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[RFC PATCH v1 5/6] selftests/rseq: x86: Implement rseq_load_u32_u32

by Mathieu Desnoyers

Allow loading a pair of u32 within a rseq critical section. It can be used in situations where both rseq_abi()->mm_cid and rseq_abi()->node_id need to be sampled atomically with respect to preemption, signal delivery and migration. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Shuah Khan <skhan(a)linuxfoundation.org> Cc: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/rseq/rseq-x86-bits.h | 43 ++++++++++++++++++++ tools/testing/selftests/rseq/rseq.h | 14 +++++++ 2 files changed, 57 insertions(+) diff --git a/tools/testing/selftests/rseq/rseq-x86-bits.h b/tools/testing/selftests/rseq/rseq-x86-bits.h index 8a9431eec467..fdf5ef398393 100644 --- a/tools/testing/selftests/rseq/rseq-x86-bits.h +++ b/tools/testing/selftests/rseq/rseq-x86-bits.h @@ -990,4 +990,47 @@ int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_trymemcpy_storev)(intptr_t *v, intptr_t #endif +#if defined(RSEQ_TEMPLATE_CPU_ID_NONE) && defined(RSEQ_TEMPLATE_MO_RELAXED) + +#define RSEQ_ARCH_HAS_LOAD_U32_U32 + +static inline __attribute__((always_inline)) +int RSEQ_TEMPLATE_IDENTIFIER(rseq_load_u32_u32)(uint32_t *dst1, uint32_t *src1, + uint32_t *dst2, uint32_t *src2) +{ + RSEQ_INJECT_C(9) + + __asm__ __volatile__ goto ( + RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ + /* Start rseq by storing table entry pointer into rseq_cs. */ + RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset])) + RSEQ_INJECT_ASM(3) + "movl %[src1], %%eax\n\t" + "movl %%eax, %[dst1]\n\t" + "movl %[src2], %%eax\n\t" + "movl %%eax, %[dst2]\n\t" + "2:\n\t" + RSEQ_INJECT_ASM(4) + RSEQ_ASM_DEFINE_ABORT(4, "", abort) + : /* gcc asm goto does not allow outputs */ + : [rseq_offset] "r" (rseq_offset), + /* final store input */ + [dst1] "m" (*dst1), + [src1] "m" (*src1), + [dst2] "m" (*dst2), + [src2] "m" (*src2) + : "memory", "cc", "rax" + RSEQ_INJECT_CLOBBER + : abort + ); + rseq_after_asm_goto(); + return 0; +abort: + rseq_after_asm_goto(); + RSEQ_INJECT_FAILED + return -1; +} + +#endif /* defined(RSEQ_TEMPLATE_CPU_ID_NONE) && defined(RSEQ_TEMPLATE_MO_RELAXED) */ + #include "rseq-bits-reset.h" diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h index d7364ea4d201..b6095c2a5da6 100644 --- a/tools/testing/selftests/rseq/rseq.h +++ b/tools/testing/selftests/rseq/rseq.h @@ -381,4 +381,18 @@ int rseq_cmpeqv_trymemcpy_storev(enum rseq_mo rseq_mo, enum rseq_percpu_mode per } } +#ifdef RSEQ_ARCH_HAS_LOAD_U32_U32 + +static inline __attribute__((always_inline)) +int rseq_load_u32_u32(enum rseq_mo rseq_mo, + uint32_t *dst1, uint32_t *src1, + uint32_t *dst2, uint32_t *src2) +{ + if (rseq_mo != RSEQ_MO_RELAXED) + return -1; + return rseq_load_u32_u32_relaxed(dst1, src1, dst2, src2); +} + +#endif + #endif /* RSEQ_H_ */ -- 2.39.2

1 year, 3 months

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[PATCH nf-next v2 2/2] netfilter: Make IP6_NF_IPTABLES_LEGACY selectable

by Breno Leitao

This option makes IP6_NF_IPTABLES_LEGACY user selectable, giving users the option to configure iptables without enabling any other config. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- net/ipv6/netfilter/Kconfig | 22 ++++++++++++---------- tools/testing/selftests/net/config | 1 + 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig index f3c8e2d918e1..dad0a50d3ef4 100644 --- a/net/ipv6/netfilter/Kconfig +++ b/net/ipv6/netfilter/Kconfig @@ -8,7 +8,13 @@ menu "IPv6: Netfilter Configuration" # old sockopt interface and eval loop config IP6_NF_IPTABLES_LEGACY - tristate + tristate "Legacy IP6 tables support" + depends on INET && IPV6 + select NETFILTER_XTABLES + default n + help + ip6tables is a general, extensible packet identification legacy framework. + This is not needed if you are using iptables over nftables (iptables-nft). config NF_SOCKET_IPV6 tristate "IPv6 socket lookup support" @@ -190,7 +196,7 @@ config IP6_NF_TARGET_HL config IP6_NF_FILTER tristate "Packet filtering" default m if NETFILTER_ADVANCED=n - select IP6_NF_IPTABLES_LEGACY + depends on IP6_NF_IPTABLES_LEGACY tristate help Packet filtering defines a table `filter', which has a series of @@ -227,7 +233,7 @@ config IP6_NF_TARGET_SYNPROXY config IP6_NF_MANGLE tristate "Packet mangling" default m if NETFILTER_ADVANCED=n - select IP6_NF_IPTABLES_LEGACY + depends on IP6_NF_IPTABLES_LEGACY help This option adds a `mangle' table to iptables: see the man page for iptables(8). This table is used for various packet alterations @@ -237,7 +243,7 @@ config IP6_NF_MANGLE config IP6_NF_RAW tristate 'raw table support (required for TRACE)' - select IP6_NF_IPTABLES_LEGACY + depends on IP6_NF_IPTABLES_LEGACY help This option adds a `raw' table to ip6tables. This table is the very first in the netfilter framework and hooks in at the PREROUTING @@ -249,9 +255,7 @@ config IP6_NF_RAW # security table for MAC policy config IP6_NF_SECURITY tristate "Security table" - depends on SECURITY - depends on NETFILTER_ADVANCED - select IP6_NF_IPTABLES_LEGACY + depends on SECURITY && NETFILTER_ADVANCED && IP6_NF_IPTABLES_LEGACY help This option adds a `security' table to iptables, for use with Mandatory Access Control (MAC) policy. @@ -260,10 +264,8 @@ config IP6_NF_SECURITY config IP6_NF_NAT tristate "ip6tables NAT support" - depends on NF_CONNTRACK - depends on NETFILTER_ADVANCED + depends on NF_CONNTRACK && NETFILTER_ADVANCED && IP6_NF_IPTABLES_LEGACY select NF_NAT - select IP6_NF_IPTABLES_LEGACY select NETFILTER_XT_NAT help This enables the `nat' table in ip6tables. This allows masquerading, diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config index 784e2965896a..32e04837084e 100644 --- a/tools/testing/selftests/net/config +++ b/tools/testing/selftests/net/config @@ -34,6 +34,7 @@ CONFIG_IPV6_SIT=y CONFIG_IP_DCCP=m CONFIG_NF_NAT=m CONFIG_IP6_NF_IPTABLES=m +CONFIG_IP6_NF_IPTABLES_LEGACY=m CONFIG_IP_NF_IPTABLES=m CONFIG_IP_NF_IPTABLES_LEGACY=m CONFIG_IP6_NF_NAT=m -- 2.43.5

1 year, 3 months

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[PATCH nf-next v2 1/2] netfilter: Make IP_NF_IPTABLES_LEGACY selectable

by Breno Leitao

This option makes IP_NF_IPTABLES_LEGACY user selectable, giving users the option to configure iptables without enabling any other config. Suggested-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Breno Leitao <leitao(a)debian.org> --- net/ipv4/netfilter/Kconfig | 19 +++++++++++-------- tools/testing/selftests/net/config | 1 + 2 files changed, 12 insertions(+), 8 deletions(-) diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index 1b991b889506..a06c1903183f 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -12,7 +12,12 @@ config NF_DEFRAG_IPV4 # old sockopt interface and eval loop config IP_NF_IPTABLES_LEGACY - tristate + tristate "Legacy IP tables support" + default n + select NETFILTER_XTABLES + help + iptables is a general, extensible packet identification legacy framework. + This is not needed if you are using iptables over nftables (iptables-nft). config NF_SOCKET_IPV4 tristate "IPv4 socket lookup support" @@ -177,7 +182,7 @@ config IP_NF_MATCH_TTL config IP_NF_FILTER tristate "Packet filtering" default m if NETFILTER_ADVANCED=n - select IP_NF_IPTABLES_LEGACY + depends on IP_NF_IPTABLES_LEGACY help Packet filtering defines a table `filter', which has a series of rules for simple packet filtering at local input, forwarding and @@ -217,7 +222,7 @@ config IP_NF_NAT default m if NETFILTER_ADVANCED=n select NF_NAT select NETFILTER_XT_NAT - select IP_NF_IPTABLES_LEGACY + depends on IP_NF_IPTABLES_LEGACY help This enables the `nat' table in iptables. This allows masquerading, port forwarding and other forms of full Network Address Port @@ -258,7 +263,7 @@ endif # IP_NF_NAT config IP_NF_MANGLE tristate "Packet mangling" default m if NETFILTER_ADVANCED=n - select IP_NF_IPTABLES_LEGACY + depends on IP_NF_IPTABLES_LEGACY help This option adds a `mangle' table to iptables: see the man page for iptables(8). This table is used for various packet alterations @@ -293,7 +298,7 @@ config IP_NF_TARGET_TTL # raw + specific targets config IP_NF_RAW tristate 'raw table support (required for NOTRACK/TRACE)' - select IP_NF_IPTABLES_LEGACY + depends on IP_NF_IPTABLES_LEGACY help This option adds a `raw' table to iptables. This table is the very first in the netfilter framework and hooks in at the PREROUTING @@ -305,9 +310,7 @@ config IP_NF_RAW # security table for MAC policy config IP_NF_SECURITY tristate "Security table" - depends on SECURITY - depends on NETFILTER_ADVANCED - select IP_NF_IPTABLES_LEGACY + depends on SECURITY && NETFILTER_ADVANCED && IP_NF_IPTABLES_LEGACY help This option adds a `security' table to iptables, for use with Mandatory Access Control (MAC) policy. diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config index 5b9baf708950..784e2965896a 100644 --- a/tools/testing/selftests/net/config +++ b/tools/testing/selftests/net/config @@ -35,6 +35,7 @@ CONFIG_IP_DCCP=m CONFIG_NF_NAT=m CONFIG_IP6_NF_IPTABLES=m CONFIG_IP_NF_IPTABLES=m +CONFIG_IP_NF_IPTABLES_LEGACY=m CONFIG_IP6_NF_NAT=m CONFIG_IP6_NF_RAW=m CONFIG_IP_NF_NAT=m -- 2.43.5

1 year, 3 months

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[PATCH v3] kselftest/arm64: signal: fix/refactor SVE vector length enumeration

by Andre Przywara

Currently a number of SVE/SME related tests have almost identical functions to enumerate all supported vector lengths. However over time the copy&pasted code has diverged, allowing some bugs to creep in: - fake_sigreturn_sme_change_vl reports a failure, not a SKIP if only one vector length is supported (but the SVE version is fine) - fake_sigreturn_sme_change_vl tries to set the SVE vector length, not the SME one (but the other SME tests are fine) - za_no_regs keeps iterating forever if only one vector length is supported (but za_regs is correct) Since those bugs seem to be mostly copy&paste ones, let's consolidate the enumeration loop into one shared function, and just call that from each test. That should fix the above bugs, and prevent similar issues from happening again. Fixes: 4963aeb35a9e ("kselftest/arm64: signal: Add SME signal handling tests") Signed-off-by: Andre Przywara <andre.przywara(a)arm.com> Reviewed-by: Mark Brown <broonie(a)kernel.org> --- Hi, v3 is fixing the build for the fake_sigreturn_sve_change_vl test, which was missing a #include. Rest is still the same. Cheers, Andre Changelog v2 .. v3: - add missing kselftest.h include Changelog v1 .. v2: - do minimal vector length check for both SME and SVE - add comment explaining reason for vector length check tools/testing/selftests/arm64/signal/Makefile | 2 +- .../selftests/arm64/signal/sve_helpers.c | 56 +++++++++++++++++++ .../selftests/arm64/signal/sve_helpers.h | 21 +++++++ .../testcases/fake_sigreturn_sme_change_vl.c | 32 +++-------- .../testcases/fake_sigreturn_sve_change_vl.c | 30 ++-------- .../arm64/signal/testcases/ssve_regs.c | 36 +++--------- .../arm64/signal/testcases/ssve_za_regs.c | 36 +++--------- .../arm64/signal/testcases/sve_regs.c | 32 +++-------- .../arm64/signal/testcases/za_no_regs.c | 32 +++-------- .../arm64/signal/testcases/za_regs.c | 36 +++--------- 10 files changed, 132 insertions(+), 181 deletions(-) create mode 100644 tools/testing/selftests/arm64/signal/sve_helpers.c create mode 100644 tools/testing/selftests/arm64/signal/sve_helpers.h diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile index 37c8207b99cfc..1381039fb36f9 100644 --- a/tools/testing/selftests/arm64/signal/Makefile +++ b/tools/testing/selftests/arm64/signal/Makefile @@ -23,7 +23,7 @@ $(TEST_GEN_PROGS): $(PROGS) # Common test-unit targets to build common-layout test-cases executables # Needs secondary expansion to properly include the testcase c-file in pre-reqs COMMON_SOURCES := test_signals.c test_signals_utils.c testcases/testcases.c \ - signals.S + signals.S sve_helpers.c COMMON_HEADERS := test_signals.h test_signals_utils.h testcases/testcases.h .SECONDEXPANSION: diff --git a/tools/testing/selftests/arm64/signal/sve_helpers.c b/tools/testing/selftests/arm64/signal/sve_helpers.c new file mode 100644 index 0000000000000..0acc121af3062 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/sve_helpers.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2024 ARM Limited + * + * Common helper functions for SVE and SME functionality. + */ + +#include <stdbool.h> +#include <kselftest.h> +#include <asm/sigcontext.h> +#include <sys/prctl.h> + +unsigned int vls[SVE_VQ_MAX]; +unsigned int nvls; + +int sve_fill_vls(bool use_sme, int min_vls) +{ + int vq, vl; + int pr_set_vl = use_sme ? PR_SME_SET_VL : PR_SVE_SET_VL; + int len_mask = use_sme ? PR_SME_VL_LEN_MASK : PR_SVE_VL_LEN_MASK; + + /* + * Enumerate up to SVE_VQ_MAX vector lengths + */ + for (vq = SVE_VQ_MAX; vq > 0; --vq) { + vl = prctl(pr_set_vl, vq * 16); + if (vl == -1) + return KSFT_FAIL; + + vl &= len_mask; + + /* + * Unlike SVE, SME does not require the minimum vector length + * to be implemented, or the VLs to be consecutive, so any call + * to the prctl might return the single implemented VL, which + * might be larger than 16. So to avoid this loop never + * terminating, bail out here when we find a higher VL than + * we asked for. + * See the ARM ARM, DDI 0487K.a, B1.4.2: I_QQRNR and I_NWYBP. + */ + if (vq < sve_vq_from_vl(vl)) + break; + + /* Skip missing VLs */ + vq = sve_vq_from_vl(vl); + + vls[nvls++] = vl; + } + + if (nvls < min_vls) { + fprintf(stderr, "Only %d VL supported\n", nvls); + return KSFT_SKIP; + } + + return KSFT_PASS; +} diff --git a/tools/testing/selftests/arm64/signal/sve_helpers.h b/tools/testing/selftests/arm64/signal/sve_helpers.h new file mode 100644 index 0000000000000..50948ce471cc6 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/sve_helpers.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2024 ARM Limited + * + * Common helper functions for SVE and SME functionality. + */ + +#ifndef __SVE_HELPERS_H__ +#define __SVE_HELPERS_H__ + +#include <stdbool.h> + +#define VLS_USE_SVE false +#define VLS_USE_SME true + +extern unsigned int vls[]; +extern unsigned int nvls; + +int sve_fill_vls(bool use_sme, int min_vls); + +#endif diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c index ebd5815b54bba..cb8c051b5c8f2 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c @@ -6,44 +6,28 @@ * handler, this is not supported and is expected to segfault. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" struct fake_sigframe sf; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 2); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SVE_SET_VL, vq * 16); - if (vl == -1) - return false; + if (!res) + return true; - vl &= PR_SME_VL_LEN_MASK; + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least two VLs */ - if (nvls < 2) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } - - return true; + return false; } static int fake_sigreturn_ssve_change_vl(struct tdescr *td, diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c index e2a452190511f..e1ccf8f85a70c 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c @@ -12,40 +12,22 @@ #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" struct fake_sigframe sf; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sve_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SVE, 2); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SVE_SET_VL, vq * 16); - if (vl == -1) - return false; + if (!res) + return true; - vl &= PR_SVE_VL_LEN_MASK; - - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least two VLs */ - if (nvls < 2) { - fprintf(stderr, "Only %d VL supported\n", nvls); + if (res == KSFT_SKIP) td->result = KSFT_SKIP; - return false; - } - return true; + return false; } static int fake_sigreturn_sve_change_vl(struct tdescr *td, diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c index 3d37daafcff51..6dbe48cf8b09e 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c @@ -6,51 +6,31 @@ * set up as expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 64]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Did we find the lowest supported VL? */ - if (vq < sve_vq_from_vl(vl)) - break; + if (!res) + return true; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_ssve_regs(void) diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c index 9dc5f128bbc0d..5557e116e9736 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c @@ -6,51 +6,31 @@ * signal frames is set up as expected when enabled simultaneously. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Did we find the lowest supported VL? */ - if (vq < sve_vq_from_vl(vl)) - break; + if (!res) + return true; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_regs(void) diff --git a/tools/testing/selftests/arm64/signal/testcases/sve_regs.c b/tools/testing/selftests/arm64/signal/testcases/sve_regs.c index 8b16eabbb7697..8143eb1c58c18 100644 --- a/tools/testing/selftests/arm64/signal/testcases/sve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/sve_regs.c @@ -6,47 +6,31 @@ * expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 64]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sve_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SVE, 1); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SVE_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SVE_VL_LEN_MASK; - - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); + if (!res) + return true; - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_sve_regs(void) diff --git a/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c index 4d6f94b6178f3..ce26e9c2fa5e3 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c @@ -6,47 +6,31 @@ * expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SME_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); + if (!res) + return true; - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, diff --git a/tools/testing/selftests/arm64/signal/testcases/za_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_regs.c index 174ad66566964..b9e13f27f1f9a 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_regs.c @@ -6,51 +6,31 @@ * expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SME_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Did we find the lowest supported VL? */ - if (vq < sve_vq_from_vl(vl)) - break; + if (!res) + return true; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_za_regs(void) -- 2.25.1

1 year, 3 months

2
1
0 0

[PATCH net-next v14 04/11] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index de2a044cc665..969e345b0f9c 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -752,14 +752,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -849,7 +849,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index 504453c688d7..a8cffe47cf01 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 6b3f01beb294..dcfd84cf0694 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1609,7 +1609,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1619,8 +1618,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 4a009122991e..c52598eaf7e7 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -117,7 +117,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_frag.va = NULL; + page_frag_cache_init(&test_frag); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

1 year, 3 months

1
0
0 0

[PATCH net-next v14 02/11] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index f53f76e0b17e..01a49be7c98d 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 485424979254..843d75412105 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index a2f6179b672b..cdc1e3696439 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -46,6 +47,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index cf8f6ce06742..7482997c719f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d2915f8c9dc0..e9d342fa8058 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 28f80daf5c04..7e830613da1b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4803,142 +4803,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 0e803db1ad79..4a009122991e 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright: linyunsheng(a)huawei.com */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> static struct ptr_ring ptr_ring; static int nr_objs = 512; -- 2.33.0

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[PATCH net-next v14 01/11] mm: page_frag: add a test module for page_frag

by Yunsheng Lin

The testing is done by ensuring that the fragment allocated from a frag_frag_cache instance is pushed into a ptr_ring instance in a kthread binded to a specified cpu, and a kthread binded to a specified cpu will pop the fragment from the ptr_ring and free the fragment. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- tools/testing/selftests/mm/Makefile | 2 + tools/testing/selftests/mm/page_frag/Makefile | 18 ++ .../selftests/mm/page_frag/page_frag_test.c | 170 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 9 +- 4 files changed, 198 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/mm/page_frag/Makefile create mode 100644 tools/testing/selftests/mm/page_frag/page_frag_test.c diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 7b8a5def54a1..a21572e81f1d 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -36,6 +36,8 @@ MAKEFLAGS += --no-builtin-rules CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) LDLIBS = -lrt -lpthread -lm +TEST_GEN_MODS_DIR := page_frag + TEST_GEN_FILES = cow TEST_GEN_FILES += compaction_test TEST_GEN_FILES += gup_longterm diff --git a/tools/testing/selftests/mm/page_frag/Makefile b/tools/testing/selftests/mm/page_frag/Makefile new file mode 100644 index 000000000000..58dda74d50a3 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/Makefile @@ -0,0 +1,18 @@ +PAGE_FRAG_TEST_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(PAGE_FRAG_TEST_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = page_frag_test.ko + +obj-m += page_frag_test.o + +all: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) clean diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c new file mode 100644 index 000000000000..0e803db1ad79 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -0,0 +1,170 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test module for page_frag cache + * + * Copyright: linyunsheng(a)huawei.com + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/cpumask.h> +#include <linux/completion.h> +#include <linux/ptr_ring.h> +#include <linux/kthread.h> + +static struct ptr_ring ptr_ring; +static int nr_objs = 512; +static atomic_t nthreads; +static struct completion wait; +static struct page_frag_cache test_frag; + +static int nr_test = 5120000; +module_param(nr_test, int, 0); +MODULE_PARM_DESC(nr_test, "number of iterations to test"); + +static bool test_align; +module_param(test_align, bool, 0); +MODULE_PARM_DESC(test_align, "use align API for testing"); + +static int test_alloc_len = 2048; +module_param(test_alloc_len, int, 0); +MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); + +static int test_push_cpu; +module_param(test_push_cpu, int, 0); +MODULE_PARM_DESC(test_push_cpu, "test cpu for pushing fragment"); + +static int test_pop_cpu; +module_param(test_pop_cpu, int, 0); +MODULE_PARM_DESC(test_pop_cpu, "test cpu for popping fragment"); + +static int page_frag_pop_thread(void *arg) +{ + struct ptr_ring *ring = arg; + int nr = nr_test; + + pr_info("page_frag pop test thread begins on cpu %d\n", + smp_processor_id()); + + while (nr > 0) { + void *obj = __ptr_ring_consume(ring); + + if (obj) { + nr--; + page_frag_free(obj); + } else { + cond_resched(); + } + } + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + pr_info("page_frag pop test thread exits on cpu %d\n", + smp_processor_id()); + + return 0; +} + +static int page_frag_push_thread(void *arg) +{ + struct ptr_ring *ring = arg; + int nr = nr_test; + + pr_info("page_frag push test thread begins on cpu %d\n", + smp_processor_id()); + + while (nr > 0) { + void *va; + int ret; + + if (test_align) { + va = page_frag_alloc_align(&test_frag, test_alloc_len, + GFP_KERNEL, SMP_CACHE_BYTES); + + WARN_ONCE((unsigned long)va & (SMP_CACHE_BYTES - 1), + "unaligned va returned\n"); + } else { + va = page_frag_alloc(&test_frag, test_alloc_len, GFP_KERNEL); + } + + if (!va) + continue; + + ret = __ptr_ring_produce(ring, va); + if (ret) { + page_frag_free(va); + cond_resched(); + } else { + nr--; + } + } + + pr_info("page_frag push test thread exits on cpu %d\n", + smp_processor_id()); + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + return 0; +} + +static int __init page_frag_test_init(void) +{ + struct task_struct *tsk_push, *tsk_pop; + ktime_t start; + u64 duration; + int ret; + + test_frag.va = NULL; + atomic_set(&nthreads, 2); + init_completion(&wait); + + if (test_alloc_len > PAGE_SIZE || test_alloc_len <= 0 || + !cpu_active(test_push_cpu) || !cpu_active(test_pop_cpu)) + return -EINVAL; + + ret = ptr_ring_init(&ptr_ring, nr_objs, GFP_KERNEL); + if (ret) + return ret; + + tsk_push = kthread_create_on_cpu(page_frag_push_thread, &ptr_ring, + test_push_cpu, "page_frag_push"); + if (IS_ERR(tsk_push)) + return PTR_ERR(tsk_push); + + tsk_pop = kthread_create_on_cpu(page_frag_pop_thread, &ptr_ring, + test_pop_cpu, "page_frag_pop"); + if (IS_ERR(tsk_pop)) { + kthread_stop(tsk_push); + return PTR_ERR(tsk_pop); + } + + start = ktime_get(); + wake_up_process(tsk_push); + wake_up_process(tsk_pop); + + pr_info("waiting for test to complete\n"); + wait_for_completion(&wait); + + duration = (u64)ktime_us_delta(ktime_get(), start); + pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", duration); + + ptr_ring_cleanup(&ptr_ring, NULL); + page_frag_cache_drain(&test_frag); + + return -EAGAIN; +} + +static void __exit page_frag_test_exit(void) +{ +} + +module_init(page_frag_test_init); +module_exit(page_frag_test_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yunsheng Lin <linyunsheng(a)huawei.com>"); +MODULE_DESCRIPTION("Test module for page_frag"); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 03ac4f2e1cce..3636d984b786 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -75,6 +75,8 @@ separated by spaces: read-only VMAs - mdwe test prctl(PR_SET_MDWE, ...) +- page_frag + test handling of page fragment allocation and freeing example: ./run_vmtests.sh -t "hmm mmap ksm" EOF @@ -231,7 +233,8 @@ run_test() { ("$@" 2>&1) | tap_prefix local ret=${PIPESTATUS[0]} count_total=$(( count_total + 1 )) - if [ $ret -eq 0 ]; then + # page_frag_test.ko returns 11(EAGAIN) when insmod'ing to avoid rmmod + if [ $ret -eq 0 ] | [ $ret -eq 11 -a ${CATEGORY} == "page_frag" ]; then count_pass=$(( count_pass + 1 )) echo "[PASS]" | tap_prefix echo "ok ${count_total} ${test}" | tap_output @@ -453,6 +456,10 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test +CATEGORY="page_frag" run_test insmod ./page_frag/page_frag_test.ko + +CATEGORY="page_frag" run_test insmod ./page_frag/page_frag_test.ko test_alloc_len=12 test_align=1 + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output -- 2.33.0

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[PATCH net-next v3 0/8] net/selftests: TCP-AO selftests updates

by Dmitry Safonov via B4 Relay

First 3 patches are more-or-less cleanups/preparations. Patches 4/5 are fixes for netns file descriptors leaks/open. Patch 6 was sent to me/contributed off-list by Mohammad, who wants 32-bit kernels to run TCP-AO. Patch 7 is a workaround/fix for slow VMs. Albeit, I can't reproduce the issue, but I hope it will fix netdev flakes for connect-deny-* tests. And the biggest change is adding TCP-AO tracepoints to selftests. I think it's a good addition by the following reasons: - The related tracepoints are now tested; - It allows tcp-ao selftests to raise expectations on the kernel behavior - up from the syscalls exit statuses + net counters. - Provides tracepoints usage samples. As tracepoints are not a stable ABI, any kernel changes done to them will be reflected to the selftests, which also will allow users to see how to change their code. It's quite better than parsing dmesg (what BGP was doing pre-tracepoints, ugh). Somewhat arguably, the code parses trace_pipe, rather than uses libtraceevent (which any sane user should do). The reason behind that is the same as for rt-netlink macros instead of libmnl: I'm trying to minimize the library dependencies of the selftests. And the performance of formatting text in kernel and parsing it again in a test is not critical. Current output sample: > ok 73 Trace events matched expectations: 13 tcp_hash_md5_required[2] tcp_hash_md5_unexpected[4] tcp_hash_ao_required[3] tcp_ao_key_not_found[4] Previously, tracepoints selftests were part of kernel tcp tracepoints submission [1], but since then the code was quite changed: - Now generic tracing setup is in lib/ftrace.c, separate from lib/ftrace-tcp.c which utilizes TCP trace points. This separation allows future selftests to trace non-TCP events, i.e. to find out an skb's drop reason, which was useful in the creation of TCP-CLOSE stress-test (not in this patch set, but used in attempt to reproduce the issue from [2]). - Another change is that in the previous submission the trace events where used only to detect unexpected TCP-AO/TCP-MD5 events. In this version the selftests will fail if an expected trace event didn't appear. Let's see how reliable this is on the netdev bot - it obviously passes on my testing, but potentially may require a temporary XFAIL patch if it misbehaves on a slow VM. [1] https://lore.kernel.org/lkml/20240224-tcp-ao-tracepoints-v1-0-15f31b7f30a7@… [2] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3… Signed-off-by: Dmitry Safonov <0x7f454c46(a)gmail.com> --- Changes in v3: - Corrected the selftests printing of tcp header flags, parsed from trace points - Fixed an issue with VRF kconfig checks (and tests) - Made check for unexpected trace events XFAIL, yet looking into the reason behind the fail - Link to v2: https://lore.kernel.org/r/20240802-tcp-ao-selftests-upd-6-12-v2-0-370c99358… Changes in v2: - Fixed two issues with parsing TCP-AO events: the socket state and TCP segment flags. Hopefully, won't fail on netdev. - Reword patch 1 & 2 messages to be more informative and at some degree formal (Paolo) - Since commit e33a02ed6a4f ("selftests: Add printf attribute to kselftest prints") it's possible to use __printf instead of "raw" gcc attribute - switch using that, as checkpatch suggests. - Link to v1: https://lore.kernel.org/r/20240730-tcp-ao-selftests-upd-6-12-v1-0-ffd4bf15d… --- Dmitry Safonov (7): selftests/net: Clean-up double assignment selftests/net: Provide test_snprintf() helper selftests/net: Be consistent in kconfig checks selftests/net: Open /proc/thread-self in open_netns() selftests/net: Don't forget to close nsfd after switch_save_ns() selftests/net: Synchronize client/server before counters checks selftests/net: Add trace events matching to tcp_ao Mohammad Nassiri (1): selftests/tcp_ao: Fix printing format for uint64_t tools/testing/selftests/net/tcp_ao/Makefile | 3 +- tools/testing/selftests/net/tcp_ao/bench-lookups.c | 2 +- tools/testing/selftests/net/tcp_ao/config | 1 + tools/testing/selftests/net/tcp_ao/connect-deny.c | 25 +- tools/testing/selftests/net/tcp_ao/connect.c | 6 +- tools/testing/selftests/net/tcp_ao/icmps-discard.c | 2 +- .../testing/selftests/net/tcp_ao/key-management.c | 18 +- tools/testing/selftests/net/tcp_ao/lib/aolib.h | 176 ++++++- .../testing/selftests/net/tcp_ao/lib/ftrace-tcp.c | 549 +++++++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/ftrace.c | 466 +++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/kconfig.c | 31 +- tools/testing/selftests/net/tcp_ao/lib/setup.c | 17 +- tools/testing/selftests/net/tcp_ao/lib/sock.c | 1 - tools/testing/selftests/net/tcp_ao/lib/utils.c | 26 + tools/testing/selftests/net/tcp_ao/restore.c | 30 +- tools/testing/selftests/net/tcp_ao/rst.c | 2 +- tools/testing/selftests/net/tcp_ao/self-connect.c | 19 +- tools/testing/selftests/net/tcp_ao/seq-ext.c | 28 +- .../selftests/net/tcp_ao/setsockopt-closed.c | 6 +- tools/testing/selftests/net/tcp_ao/unsigned-md5.c | 35 +- 20 files changed, 1376 insertions(+), 67 deletions(-) --- base-commit: a9c60712d71ff07197b2982899b9db28ed548ded change-id: 20240730-tcp-ao-selftests-upd-6-12-4d3e53a74f3f Best regards, -- Dmitry Safonov <0x7f454c46(a)gmail.com>

1 year, 3 months

3
16
0 0

[PATCH] selftests/bpf: Fix incorrect parameters in NULL pointer checking

by Hao Ge

From: Hao Ge <gehao(a)kylinos.cn> Smatch reported the following warning: ./tools/testing/selftests/bpf/testing_helpers.c:455 get_xlated_program() warn: variable dereferenced before check 'buf' (see line 454) It seems correct,so let's modify it based on it's suggestion. Actually,commit b23ed4d74c4d ("selftests/bpf: Fix invalid pointer check in get_xlated_program()") fixed an issue in the test_verifier.c once,but it was reverted this time. Let's solve this issue with the minimal changes possible. Reported-by: Dan Carpenter <dan.carpenter(a)linaro.org> Closes: https://lore.kernel.org/all/1eb3732f-605a-479d-ba64-cd14250cbf91@stanley.mo… Fixes: b4b7a4099b8c ("selftests/bpf: Factor out get_xlated_program() helper") Signed-off-by: Hao Ge <gehao(a)kylinos.cn> --- tools/testing/selftests/bpf/testing_helpers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/testing_helpers.c b/tools/testing/selftests/bpf/testing_helpers.c index d5379a0e6da8..34dfea295c8e 100644 --- a/tools/testing/selftests/bpf/testing_helpers.c +++ b/tools/testing/selftests/bpf/testing_helpers.c @@ -451,7 +451,7 @@ int get_xlated_program(int fd_prog, struct bpf_insn **buf, __u32 *cnt) *cnt = xlated_prog_len / buf_element_size; *buf = calloc(*cnt, buf_element_size); - if (!buf) { + if (!*buf) { perror("can't allocate xlated program buffer"); return -ENOMEM; } -- 2.25.1

1 year, 3 months

4
6
0 0

[PATCH v9 net-next 0/3] Enhance network interface feature testing

by Abhinav Jain

This small series includes fixes for creation of veth pairs for networkless kernels & adds tests for turning the different network interface features on and off in selftests/net/netdevice.sh script. Tested using vng and compiles for network as well as networkless kernel. Changes in v9: Removed veth1 to avoid redundant testing as per feedback in v8. Changes in v8: https://lore.kernel.org/all/20240819121235.39514-1-jain.abhinav177@gmail.co… Remove redundant variable initial_state as per feedback in v7. Changes in v7: https://lore.kernel.org/all/20240815105924.1389290-1-jain.abhinav177@gmail.… Create a third patch in the series to do SKIP -> XFAIL replacement. Add logic to incorporate XFAIL on setting IP address for veth pair. Changes in v6: https://lore.kernel.org/all/20240814191517.50466-1-jain.abhinav177@gmail.com Use XFAIL for ethtool operations that are unsupported instead of SKIP. Changes in v5: https://lore.kernel.org/all/20240808122452.25683-1-jain.abhinav177@gmail.com Rectify the syntax for ip add link. Fix the veth_created condition check. Changes in v4: https://lore.kernel.org/all/20240807175717.7775-1-jain.abhinav177@gmail.com Move veth creation/removal to the main shell script. Tested using vng on a networkless kernel and the script works, sample output below the changes. Changes in v3: https://lore.kernel.org/all/20240614113240.41550-1-jain.abhinav177@gmail.com Add a check for netdev, create veth pair for testing. Restore feature to its initial state. Changes in v2: https://lore.kernel.org/all/20240609132124.51683-1-jain.abhinav177@gmail.com Remove tail usage; use read to parse the features from temp file. v1: https://lore.kernel.org/all/20240606212714.27472-1-jain.abhinav177@gmail.com ``` # selftests: net: netdevice.sh # No valid network device found, creating veth pair # PASS: veth0: set interface up # PASS: veth0: set MAC address # XFAIL: veth0: set IP address unsupported for veth* # PASS: veth0: ethtool list features # PASS: veth0: Turned off feature: rx-checksumming # PASS: veth0: Turned on feature: rx-checksumming # PASS: veth0: Restore feature rx-checksumming to initial state on # Actual changes: # tx-checksum-ip-generic: off ... # PASS: veth0: Turned on feature: rx-udp-gro-forwarding # PASS: veth0: Restore feature rx-udp-gro-forwarding to initial state off # Cannot get register dump: Operation not supported # XFAIL: veth0: ethtool dump not supported # PASS: veth0: ethtool stats # PASS: veth0: stop interface ``` Abhinav Jain (3): selftests: net: Create veth pair for testing in networkless kernel selftests: net: Add on/off checks for non-fixed features of interface selftests: net: Use XFAIL for operations not supported by the driver tools/testing/selftests/net/netdevice.sh | 60 ++++++++++++++++++++++-- 1 file changed, 56 insertions(+), 4 deletions(-) -- 2.34.1

1 year, 3 months

2
4
0 0

[PATCH] tools: Copy linux/align.h into tools/

by Ackerley Tng

This provides alignment macros for use in selftests. Also clean up tools/include/linux/bitmap.h's inline definition of IS_ALIGNED(). Signed-off-by: Ackerley Tng <ackerleytng(a)google.com> --- tools/include/linux/align.h | 15 +++++++++++++++ tools/include/linux/bitmap.h | 2 +- 2 files changed, 16 insertions(+), 1 deletion(-) create mode 100644 tools/include/linux/align.h diff --git a/tools/include/linux/align.h b/tools/include/linux/align.h new file mode 100644 index 000000000000..2b4acec7b95a --- /dev/null +++ b/tools/include/linux/align.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_ALIGN_H +#define _LINUX_ALIGN_H + +#include <linux/const.h> + +/* @a is a power of 2 value */ +#define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) +#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) +#define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) +#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) +#define PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a))) +#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) + +#endif /* _LINUX_ALIGN_H */ diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h index f3566ea0f932..8c6852dba04f 100644 --- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -3,6 +3,7 @@ #define _TOOLS_LINUX_BITMAP_H #include <string.h> +#include <linux/align.h> #include <linux/bitops.h> #include <linux/find.h> #include <stdlib.h> @@ -126,7 +127,6 @@ static inline bool bitmap_and(unsigned long *dst, const unsigned long *src1, #define BITMAP_MEM_ALIGNMENT (8 * sizeof(unsigned long)) #endif #define BITMAP_MEM_MASK (BITMAP_MEM_ALIGNMENT - 1) -#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) static inline bool bitmap_equal(const unsigned long *src1, const unsigned long *src2, unsigned int nbits) -- 2.39.2.722.g9855ee24e9-goog

1 year, 3 months

2
3
0 0

[PATCH] selftests/livepatch: wait for atomic replace to occur

by Ryan Sullivan

Uses 'loop_until' to wait for the atomic replace to unload all previous livepatches, as on some machines with a large number of CPUs there is a sizable delay between the atomic replace ocurring and when sysfs updates accordingly. Signed-off-by: Ryan Sullivan <rysulliv(a)redhat.com> --- tools/testing/selftests/livepatch/test-livepatch.sh | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/livepatch/test-livepatch.sh b/tools/testing/selftests/livepatch/test-livepatch.sh index 65c9c058458d..bd13257bfdfe 100755 --- a/tools/testing/selftests/livepatch/test-livepatch.sh +++ b/tools/testing/selftests/livepatch/test-livepatch.sh @@ -139,11 +139,8 @@ load_lp $MOD_REPLACE replace=1 grep 'live patched' /proc/cmdline > /dev/kmsg grep 'live patched' /proc/meminfo > /dev/kmsg -mods=(/sys/kernel/livepatch/*) -nmods=${#mods[@]} -if [ "$nmods" -ne 1 ]; then - die "Expecting only one moduled listed, found $nmods" -fi +loop_until 'mods=(/sys/kernel/livepatch/*); nmods=${#mods[@]}; [[ "$nmods" -eq 1 ]]' || + die "Expecting only one moduled listed, found $nmods" # These modules were disabled by the atomic replace for mod in $MOD_LIVEPATCH3 $MOD_LIVEPATCH2 $MOD_LIVEPATCH1; do -- 2.44.0

1 year, 3 months

2
1
0 0

[PATCH v2 0/3] kunit: Improve format of some assertion messages

by Michal Wajdeczko

v1: https://patchwork.kernel.org/project/linux-kselftest/list/?series=881867 v2: keep numerical values (David) Cc: David Gow <davidgow(a)google.com> Cc: Rae Moar <rmoar(a)google.com> Michal Wajdeczko (3): kunit: Improve format of the NOT_ERR_OR_NULL assertion kunit: Improve format of the PTR_EQ|NE|NULL assertion kunit: Improve format of the KUNIT_EXPECT_EQ assertion lib/kunit/assert.c | 71 +++++++++++++++++++++++++++++++++++++--------- 1 file changed, 57 insertions(+), 14 deletions(-) -- 2.43.0

1 year, 3 months

1
3
0 0

[PATCH v2] selftests:mm: Fix mmap() error paths to check for MAP_FAILED

by Yang Ruibin

To correctly detect whether mmap is successful, must use if (map_ptr == MAP_FAILED)to avoid incorrectly handling a valid mapping.Fix mmap() error paths to check for MAP_FAILED. Signed-off-by: Yang Ruibin <11162571(a)vivo.com> --- tools/testing/selftests/mm/ksm_tests.c | 2 +- tools/testing/selftests/mm/madv_populate.c | 2 +- tools/testing/selftests/mm/soft-dirty.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/mm/ksm_tests.c b/tools/testing/selftests/mm/ksm_tests.c index b748c4890..dad54840f 100644 --- a/tools/testing/selftests/mm/ksm_tests.c +++ b/tools/testing/selftests/mm/ksm_tests.c @@ -201,7 +201,7 @@ static void *allocate_memory(void *ptr, int prot, int mapping, char data, size_ { void *map_ptr = mmap(ptr, map_size, PROT_WRITE, mapping, -1, 0); - if (!map_ptr) { + if (map_ptr == MAP_FAILED) { perror("mmap"); return NULL; } diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c index ef7d911da..b89cb83ca 100644 --- a/tools/testing/selftests/mm/madv_populate.c +++ b/tools/testing/selftests/mm/madv_populate.c @@ -34,7 +34,7 @@ static void sense_support(void) addr = mmap(0, pagesize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); - if (!addr) + if (addr == MAP_FAILED) ksft_exit_fail_msg("mmap failed\n"); ret = madvise(addr, pagesize, MADV_POPULATE_READ); diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c index bdfa5d085..4ccbc053b 100644 --- a/tools/testing/selftests/mm/soft-dirty.c +++ b/tools/testing/selftests/mm/soft-dirty.c @@ -134,7 +134,7 @@ static void test_mprotect(int pagemap_fd, int pagesize, bool anon) if (anon) { map = mmap(NULL, pagesize, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); - if (!map) + if (map == MAP_FAILED) ksft_exit_fail_msg("anon mmap failed\n"); } else { test_fd = open(fname, O_RDWR | O_CREAT, 0664); -- 2.34.1

1 year, 3 months

2
1
0 0

[PATCH v6 0/2] Add test to distinguish between thread's signal mask and ucontext_t

by Dev Jain

This patch series is motivated by the following observation: Raise a signal, jump to signal handler. The ucontext_t structure dumped by kernel to userspace has a uc_sigmask field having the mask of blocked signals. If you run a fresh minimalistic program doing this, this field is empty, even if you block some signals while registering the handler with sigaction(). Here is what the man-pages have to say: sigaction(2): "sa_mask specifies a mask of signals which should be blocked (i.e., added to the signal mask of the thread in which the signal handler is invoked) during execution of the signal handler. In addition, the signal which triggered the handler will be blocked, unless the SA_NODEFER flag is used." signal(7): Under "Execution of signal handlers", (1.3) implies: "The thread's current signal mask is accessible via the ucontext_t object that is pointed to by the third argument of the signal handler." But, (1.4) states: "Any signals specified in act->sa_mask when registering the handler with sigprocmask(2) are added to the thread's signal mask. The signal being delivered is also added to the signal mask, unless SA_NODEFER was specified when registering the handler. These signals are thus blocked while the handler executes." There clearly is no distinction being made in the man pages between "Thread's signal mask" and ucontext_t; this logically should imply that a signal blocked by populating struct sigaction should be visible in ucontext_t. Here is what the kernel code does (for Aarch64): do_signal() -> handle_signal() -> sigmask_to_save(), which returns &current->blocked, is passed to setup_rt_frame() -> setup_sigframe() -> __copy_to_user(). Hence, &current->blocked is copied to ucontext_t exposed to userspace. Returning back to handle_signal(), signal_setup_done() -> signal_delivered() -> sigorsets() and set_current_blocked() are responsible for using information from struct ksignal ksig, which was populated through the sigaction() system call in kernel/signal.c: copy_from_user(&new_sa.sa, act, sizeof(new_sa.sa)), to update &current->blocked; hence, the set of blocked signals for the current thread is updated AFTER the kernel dumps ucontext_t to userspace. Assuming that the above is indeed the intended behaviour, because it semantically makes sense, since the signals blocked using sigaction() remain blocked only till the execution of the handler, and not in the context present before jumping to the handler (but nothing can be confirmed from the man-pages), the series introduces a test for mangling with uc_sigmask. I will send a separate series to fix the man-pages. The proposed selftest has been tested out on Aarch32, Aarch64 and x86_64. v5->v6: - Drop renaming of sas.c - Include the explanation from the cover letter in the changelog for the second patch v4->v5: - Remove a redundant print statement v3->v4: - Allocate sigsets as automatic variables to avoid malloc() v2->v3: - ucontext describes current state -> ucontext describes interrupted context - Add a comment for blockage of USR2 even after return from handler - Describe blockage of signals in a better way v1->v2: - Replace all occurrences of SIGPIPE with SIGSEGV - Fixed a mismatch between code comment and ksft log - Add a testcase: Raise the same signal again; it must not be queued - Remove unneeded <assert.h>, <unistd.h> - Give a detailed test description in the comments; also describe the exact meaning of delivered and blocked - Handle errors for all libc functions/syscalls - Mention tests in Makefile and .gitignore in alphabetical order v1: - https://lore.kernel.org/all/20240607122319.768640-1-dev.jain@arm.com/ Dev Jain (2): selftests: Rename sigaltstack to generic signal selftests: Add a test mangling with uc_sigmask tools/testing/selftests/Makefile | 2 +- .../{sigaltstack => signal}/.gitignore | 1 + .../{sigaltstack => signal}/Makefile | 3 +- .../current_stack_pointer.h | 0 .../selftests/signal/mangle_uc_sigmask.c | 184 ++++++++++++++++++ .../selftests/{sigaltstack => signal}/sas.c | 0 6 files changed, 188 insertions(+), 2 deletions(-) rename tools/testing/selftests/{sigaltstack => signal}/.gitignore (70%) rename tools/testing/selftests/{sigaltstack => signal}/Makefile (56%) rename tools/testing/selftests/{sigaltstack => signal}/current_stack_pointer.h (100%) create mode 100644 tools/testing/selftests/signal/mangle_uc_sigmask.c rename tools/testing/selftests/{sigaltstack => signal}/sas.c (100%) -- 2.30.2

1 year, 3 months

1
3
0 0

[PATCH net-next v3] selftests: net: add helper for checking if nettest is available

by Jakub Kicinski

A few tests check if nettest exists in the $PATH before adding $PWD to $PATH and re-checking. They don't discard stderr on the first check (and nettest is built as part of selftests, so it's pretty normal for it to not be available in system $PATH). This leads to output noise: which: no nettest in (/home/virtme/tools/fs/bin:/home/virtme/tools/fs/sbin:/home/virtme/tools/fs/usr/bin:/home/virtme/tools/fs/usr/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin) Add a common helper for the check which does silence stderr. There is another small functional change hiding here, because pmtu.sh and fib_rule_tests.sh used to return from the test case rather than completely exit. Building nettest is not hard, there should be no need to maintain the ability to selectively skip cases in its absence. Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- v3: - delete accidentally added profiling v2: https://lore.kernel.org/20240820004217.1087392-1-kuba@kernel.org - fold in the changes from Ido v1: https://lore.kernel.org/20240817183848.658443-1-kuba@kernel.org CC: shuah(a)kernel.org CC: linux-kselftest(a)vger.kernel.org CC: Ido Schimmel <idosch(a)idosch.org> --- tools/testing/selftests/net/fcnal-test.sh | 9 +---- tools/testing/selftests/net/fib_rule_tests.sh | 37 +------------------ tools/testing/selftests/net/lib.sh | 15 ++++++++ tools/testing/selftests/net/pmtu.sh | 8 +--- .../selftests/net/unicast_extensions.sh | 9 +---- .../selftests/net/vrf_route_leaking.sh | 3 +- 6 files changed, 22 insertions(+), 59 deletions(-) diff --git a/tools/testing/selftests/net/fcnal-test.sh b/tools/testing/selftests/net/fcnal-test.sh index 386ebd829df5..899dbad0104b 100755 --- a/tools/testing/selftests/net/fcnal-test.sh +++ b/tools/testing/selftests/net/fcnal-test.sh @@ -4304,14 +4304,7 @@ elif [ "$TESTS" = "ipv6" ]; then TESTS="$TESTS_IPV6" fi -# nettest can be run from PATH or from same directory as this selftest -if ! which nettest >/dev/null; then - PATH=$PWD:$PATH - if ! which nettest >/dev/null; then - echo "'nettest' command not found; skipping tests" - exit $ksft_skip - fi -fi +check_gen_prog "nettest" declare -i nfail=0 declare -i nsuccess=0 diff --git a/tools/testing/selftests/net/fib_rule_tests.sh b/tools/testing/selftests/net/fib_rule_tests.sh index 89034c5b69dc..53c5c1ad437e 100755 --- a/tools/testing/selftests/net/fib_rule_tests.sh +++ b/tools/testing/selftests/net/fib_rule_tests.sh @@ -51,31 +51,6 @@ log_test() fi } -check_nettest() -{ - if which nettest > /dev/null 2>&1; then - return 0 - fi - - # Add the selftest directory to PATH if not already done - if [ "${SELFTEST_PATH}" = "" ]; then - SELFTEST_PATH="$(dirname $0)" - PATH="${PATH}:${SELFTEST_PATH}" - - # Now retry with the new path - if which nettest > /dev/null 2>&1; then - return 0 - fi - - if [ "${ret}" -eq 0 ]; then - ret="${ksft_skip}" - fi - echo "nettest not found (try 'make -C ${SELFTEST_PATH} nettest')" - fi - - return 1 -} - setup() { set -e @@ -317,11 +292,6 @@ fib_rule6_connect_test() echo echo "IPv6 FIB rule connect tests" - if ! check_nettest; then - echo "SKIP: Could not run test without nettest tool" - return - fi - setup_peer $IP -6 rule add dsfield 0x04 table $RTABLE_PEER @@ -516,11 +486,6 @@ fib_rule4_connect_test() echo echo "IPv4 FIB rule connect tests" - if ! check_nettest; then - echo "SKIP: Could not run test without nettest tool" - return - fi - setup_peer $IP -4 rule add dsfield 0x04 table $RTABLE_PEER @@ -584,6 +549,8 @@ if [ ! -x "$(command -v ip)" ]; then exit $ksft_skip fi +check_gen_prog "nettest" + # start clean cleanup &> /dev/null setup diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 8ee4489238ca..be8707bfb46e 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -125,6 +125,21 @@ slowwait_for_counter() slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@" } +# Check for existence of tools which are built as part of selftests +# but may also already exist in $PATH +check_gen_prog() +{ + local prog_name=$1; shift + + if ! which $prog_name >/dev/null 2>/dev/null; then + PATH=$PWD:$PATH + if ! which $prog_name >/dev/null; then + echo "'$prog_name' command not found; skipping tests" + exit $ksft_skip + fi + fi +} + remove_ns_list() { local item=$1 diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 24a50622406c..569bce8b6383 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -681,13 +681,7 @@ setup_xfrm() { } setup_nettest_xfrm() { - if ! which nettest >/dev/null; then - PATH=$PWD:$PATH - if ! which nettest >/dev/null; then - echo "'nettest' command not found; skipping tests" - return 1 - fi - fi + check_gen_prog "nettest" [ ${1} -eq 6 ] && proto="-6" || proto="" port=${2} diff --git a/tools/testing/selftests/net/unicast_extensions.sh b/tools/testing/selftests/net/unicast_extensions.sh index f52aa5f7da52..3e751234ccfe 100755 --- a/tools/testing/selftests/net/unicast_extensions.sh +++ b/tools/testing/selftests/net/unicast_extensions.sh @@ -30,14 +30,7 @@ source lib.sh -# nettest can be run from PATH or from same directory as this selftest -if ! which nettest >/dev/null; then - PATH=$PWD:$PATH - if ! which nettest >/dev/null; then - echo "'nettest' command not found; skipping tests" - exit $ksft_skip - fi -fi +check_gen_prog "nettest" result=0 diff --git a/tools/testing/selftests/net/vrf_route_leaking.sh b/tools/testing/selftests/net/vrf_route_leaking.sh index 152171fb1fc8..e9c2f71da207 100755 --- a/tools/testing/selftests/net/vrf_route_leaking.sh +++ b/tools/testing/selftests/net/vrf_route_leaking.sh @@ -59,7 +59,6 @@ # while it is forwarded between different vrfs. source lib.sh -PATH=$PWD:$PWD/tools/testing/selftests/net:$PATH VERBOSE=0 PAUSE_ON_FAIL=no DEFAULT_TTYPE=sym @@ -636,6 +635,8 @@ EOF # Some systems don't have a ping6 binary anymore command -v ping6 > /dev/null 2>&1 && ping6=$(command -v ping6) || ping6=$(command -v ping) +check_gen_prog "nettest" + TESTS_IPV4="ipv4_ping_ttl ipv4_traceroute ipv4_ping_frag ipv4_ping_local ipv4_tcp_local ipv4_udp_local ipv4_ping_ttl_asym ipv4_traceroute_asym" TESTS_IPV6="ipv6_ping_ttl ipv6_traceroute ipv6_ping_local ipv6_tcp_local ipv6_udp_local -- 2.46.0

1 year, 3 months

3
2
0 0

[PATCH bpf-next v1 0/8] libbpf, selftests/bpf: Support cross-endian usage

by Tony Ambardar

Hello all, This patch series targets a long-standing BPF usability issue - the lack of general cross-compilation support - by enabling cross-endian usage of libbpf and cross-endian build targets for selftests/bpf. Use cases range from better BPF support for embedded systems based on e.g. big-endian MIPS, to more build/test options for s390x systems. Initial development and testing used mips64, since this arch makes switching the build byte-order trivial and is thus very handy for A/B testing. However, it lacks some key features (bpf2bpf call, kfuncs, etc) making for poor selftests/bpf coverage. Final testing takes the kernel and selftests/bpf cross-built from x86_64 to s390x, and runs the result under QEMU/s390x. That same configuration could also be used on kernel-patches/bpf CI for regression testing endian support or perhaps load-sharing s390x builds across x86_64 systems. This thread includes some background regarding testing on QEMU/s390x and the generally favourable results (3 failures running test_progs): https://lore.kernel.org/bpf/ZsEcsaa3juxxQBUf@kodidev-ubuntu/ Feedback and suggestions are welcome! Best regards, Tony Tony Ambardar (8): libbpf: Improve log message formatting libbpf: Fix header comment typos for BTF.ext libbpf: Fix output .symtab byte-order during linking libbpf: Support BTF.ext loading and output in either endianness libbpf: Support opening bpf objects of either endianness libbpf: Support linking bpf objects of either endianness libbpf: Support creating light skeleton of either endianness selftests/bpf: Support cross-endian building tools/lib/bpf/bpf_gen_internal.h | 1 + tools/lib/bpf/btf.c | 167 +++++++++++++++++++++++-- tools/lib/bpf/btf.h | 2 + tools/lib/bpf/btf_dump.c | 2 +- tools/lib/bpf/btf_relocate.c | 2 +- tools/lib/bpf/gen_loader.c | 179 +++++++++++++++++++++------ tools/lib/bpf/libbpf.c | 26 +++- tools/lib/bpf/libbpf.map | 2 + tools/lib/bpf/libbpf_internal.h | 17 ++- tools/lib/bpf/linker.c | 108 +++++++++++++--- tools/lib/bpf/relo_core.c | 2 +- tools/lib/bpf/skel_internal.h | 3 +- tools/testing/selftests/bpf/Makefile | 7 +- 13 files changed, 438 insertions(+), 80 deletions(-) -- 2.34.1

1 year, 3 months

2
10
0 0

[PATCH bpf-next v4 0/2] selftests/bpf: new MPTCP subflow subtest

by Matthieu Baerts (NGI0)

In this series from Geliang, modifying MPTCP BPF selftests, we have: - A new MPTCP subflow BPF program setting socket options per subflow: it looks better to have this old test program in the BPF selftests to track regressions and to serve as example. Note: Nicolas is no longer working for Tessares, but he did this work while working for them, and his email address is no longer available. - A new MPTCP BPF subtest validating the new BPF program added in the first patch. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v4: - Drop former patch 2/3: MPTCP's pm_nl_ctl requires a new header file: - I will check later if it is possible to avoid having duplicated header files in tools/include/uapi, but no need to block this series for that. Patch 2/3 can be added later if needed. - Patch 2/2: skip the test if 'ip mptcp' is not available. - Link to v3: https://lore.kernel.org/r/20240703-upstream-bpf-next-20240506-mptcp-subflow… Changes in v3: - Sorry for the delay between v2 and v3, this series was conflicting with the "add netns helpers", but it looks like it is on hold: https://lore.kernel.org/cover.1715821541.git.tanggeliang@kylinos.cn - Patch 1/3 includes "bpf_tracing_net.h", introduced in between. - New patch 2/3: "selftests/bpf: Add mptcp pm_nl_ctl link". - Patch 3/3: use the tool introduced in patch 2/3 + SYS_NOFAIL() helper. - Link to v2: https://lore.kernel.org/r/20240509-upstream-bpf-next-20240506-mptcp-subflow… Changes in v2: - Previous patches 1/4 and 2/4 have been dropped from this series: - 1/4: "selftests/bpf: Handle SIGINT when creating netns": - A new version, more generic and no longer specific to MPTCP BPF selftest will be sent later, as part of a new series. (Alexei) - 2/4: "selftests/bpf: Add RUN_MPTCP_TEST macro": - Removed, not to hide helper functions in macros. (Alexei) - The commit message of patch 1/2 has been clarified to avoid some possible confusions spot by Alexei. - Link to v1: https://lore.kernel.org/r/20240507-upstream-bpf-next-20240506-mptcp-subflow… --- Geliang Tang (1): selftests/bpf: Add mptcp subflow subtest Nicolas Rybowski (1): selftests/bpf: Add mptcp subflow example tools/testing/selftests/bpf/prog_tests/mptcp.c | 105 ++++++++++++++++++++++ tools/testing/selftests/bpf/progs/mptcp_subflow.c | 59 ++++++++++++ 2 files changed, 164 insertions(+) --- base-commit: 3d650ab5e7d9c4d7306e4c116f8aa9980bf13295 change-id: 20240506-upstream-bpf-next-20240506-mptcp-subflow-test-faef6654bfa3 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

1 year, 3 months

5
11
0 0

[PATCH 0/3] selftests: Fix cpuid / vendor checking build issues

by Ilpo Järvinen

First, generalize resctrl selftest non-contiguous CAT check to not assume non-AMD vendor implies Intel. Second, improve kselftest common parts and resctrl selftest such that the use of __cpuid_count() does not lead into a build failure (happens at least on ARM). The last patch might still require some work on which symbol the conditional in kselftest.h is implemented. I could not find any pre-existing one that could be used. Perhaps somebody who's more familiar with the kselftest build system has a better suggestion on which symbol the logic should be based at? Ilpo Järvinen (3): selftests/resctrl: Generalize non-contiguous CAT check selftests/resctrl: Always initialize ecx to avoid build warnings [RFC] kselftest: Provide __cpuid_count() stub on non-x86 archs tools/testing/selftests/kselftest.h | 6 +++++ tools/testing/selftests/lib.mk | 4 ++++ tools/testing/selftests/resctrl/cat_test.c | 28 +++++++++++++--------- 3 files changed, 27 insertions(+), 11 deletions(-) -- 2.39.2

1 year, 3 months

3
9
0 0

[PATCH] test coverage for dup_fd() failure handling in unshare_fd()

by Al Viro

At some point there'd been a dumb braino during the dup_fd() calling conventions change; caught by smatch and immediately fixed. The trouble is, there had been no test coverage for the dup_fd() failure handling - neither in kselftests nor in LTP. Fortunately, it can be triggered on stock kernel - ENOMEM would require fault injection, but EMFILE can be had with sysctl alone (fs.nr_open). Signed-off-by: Al Viro <viro(a)zeniv.linux.org.uk> --- diff --git a/tools/testing/selftests/core/Makefile b/tools/testing/selftests/core/Makefile index ce262d097269..8e99f87f5d7c 100644 --- a/tools/testing/selftests/core/Makefile +++ b/tools/testing/selftests/core/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only CFLAGS += -g $(KHDR_INCLUDES) -TEST_GEN_PROGS := close_range_test +TEST_GEN_PROGS := close_range_test unshare_test include ../lib.mk diff --git a/tools/testing/selftests/core/unshare_test.c b/tools/testing/selftests/core/unshare_test.c new file mode 100644 index 000000000000..7fec9dfb1b0e --- /dev/null +++ b/tools/testing/selftests/core/unshare_test.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE +#include <errno.h> +#include <fcntl.h> +#include <linux/kernel.h> +#include <limits.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syscall.h> +#include <unistd.h> +#include <sys/resource.h> +#include <linux/close_range.h> + +#include "../kselftest_harness.h" +#include "../clone3/clone3_selftests.h" + +TEST(unshare_EMFILE) +{ + pid_t pid; + int status; + struct __clone_args args = { + .flags = CLONE_FILES, + .exit_signal = SIGCHLD, + }; + int fd; + ssize_t n, n2; + static char buf[512], buf2[512]; + struct rlimit rlimit; + int nr_open; + + fd = open("/proc/sys/fs/nr_open", O_RDWR); + ASSERT_GE(fd, 0); + + n = read(fd, buf, sizeof(buf)); + ASSERT_GT(n, 0); + ASSERT_EQ(buf[n - 1], '\n'); + + ASSERT_EQ(sscanf(buf, "%d", &nr_open), 1); + + ASSERT_EQ(0, getrlimit(RLIMIT_NOFILE, &rlimit)); + + /* bump fs.nr_open */ + n2 = sprintf(buf2, "%d\n", nr_open + 1024); + lseek(fd, 0, SEEK_SET); + write(fd, buf2, n2); + + /* bump ulimit -n */ + rlimit.rlim_cur = nr_open + 1024; + rlimit.rlim_max = nr_open + 1024; + EXPECT_EQ(0, setrlimit(RLIMIT_NOFILE, &rlimit)) { + lseek(fd, 0, SEEK_SET); + write(fd, buf, n); + exit(EXIT_FAILURE); + } + + /* get a descriptor past the old fs.nr_open */ + EXPECT_GE(dup2(2, nr_open + 64), 0) { + lseek(fd, 0, SEEK_SET); + write(fd, buf, n); + exit(EXIT_FAILURE); + } + + /* get descriptor table shared */ + pid = sys_clone3(&args, sizeof(args)); + EXPECT_GE(pid, 0) { + lseek(fd, 0, SEEK_SET); + write(fd, buf, n); + exit(EXIT_FAILURE); + } + + if (pid == 0) { + int err; + + /* restore fs.nr_open */ + lseek(fd, 0, SEEK_SET); + write(fd, buf, n); + /* ... and now unshare(CLONE_FILES) must fail with EMFILE */ + err = unshare(CLONE_FILES); + EXPECT_EQ(err, -1) + exit(EXIT_FAILURE); + EXPECT_EQ(errno, EMFILE) + exit(EXIT_FAILURE); + exit(EXIT_SUCCESS); + } + + EXPECT_EQ(waitpid(pid, &status, 0), pid); + EXPECT_EQ(true, WIFEXITED(status)); + EXPECT_EQ(0, WEXITSTATUS(status)); +} + +TEST_HARNESS_MAIN

1 year, 3 months

2
1
0 0

[PATCH 0/3] kunit: Improve format of some assertion messages

by Michal Wajdeczko

This is mostly a re-post of a series [1] that was apparently lost last year. [1] https://lore.kernel.org/all/20230928133821.1467-1-michal.wajdeczko@intel.co… Cc: David Gow <davidgow(a)google.com> Cc: Rae Moar <rmoar(a)google.com> Michal Wajdeczko (3): kunit: Improve format of the NOT_ERR_OR_NULL assertion kunit: Improve format of the PTR_EQ|NE|NULL assertion kunit: Improve format of the KUNIT_EXPECT_EQ assertion lib/kunit/assert.c | 64 ++++++++++++++++++++++++++++++++++++---------- 1 file changed, 50 insertions(+), 14 deletions(-) -- 2.43.0

1 year, 3 months

2
6
0 0

[PATCH v1] tools:mm:Check mmap based on return values

by Yang Ruibin

To correctly detect whether mmap is successful, must use if (map_ptr == MAP_FAILED)to avoid incorrectly handling a valid mapping. Signed-off-by: Yang Ruibin <11162571(a)vivo.com> --- tools/testing/selftests/mm/ksm_tests.c | 2 +- tools/testing/selftests/mm/madv_populate.c | 2 +- tools/testing/selftests/mm/soft-dirty.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/mm/ksm_tests.c b/tools/testing/selftests/mm/ksm_tests.c index b748c48908d9..dad54840f32e 100644 --- a/tools/testing/selftests/mm/ksm_tests.c +++ b/tools/testing/selftests/mm/ksm_tests.c @@ -201,7 +201,7 @@ static void *allocate_memory(void *ptr, int prot, int mapping, char data, size_ { void *map_ptr = mmap(ptr, map_size, PROT_WRITE, mapping, -1, 0); - if (!map_ptr) { + if (map_ptr == MAP_FAILED) { perror("mmap"); return NULL; } diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c index ef7d911da13e..b89cb83ca5c5 100644 --- a/tools/testing/selftests/mm/madv_populate.c +++ b/tools/testing/selftests/mm/madv_populate.c @@ -34,7 +34,7 @@ static void sense_support(void) addr = mmap(0, pagesize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); - if (!addr) + if (addr == MAP_FAILED) ksft_exit_fail_msg("mmap failed\n"); ret = madvise(addr, pagesize, MADV_POPULATE_READ); diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c index bdfa5d085f00..4ccbc053bcce 100644 --- a/tools/testing/selftests/mm/soft-dirty.c +++ b/tools/testing/selftests/mm/soft-dirty.c @@ -134,7 +134,7 @@ static void test_mprotect(int pagemap_fd, int pagesize, bool anon) if (anon) { map = mmap(NULL, pagesize, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); - if (!map) + if (map == MAP_FAILED) ksft_exit_fail_msg("anon mmap failed\n"); } else { test_fd = open(fname, O_RDWR | O_CREAT, 0664); -- 2.34.1

1 year, 3 months

2
1
0 0

[PATCH net] selftests: mlxsw: ethtool_lanes: Source ethtool lib from correct path

by Petr Machata

From: Ido Schimmel <idosch(a)nvidia.com> Source the ethtool library from the correct path and avoid the following error: ./ethtool_lanes.sh: line 14: ./../../../net/forwarding/ethtool_lib.sh: No such file or directory Fixes: 40d269c000bd ("selftests: forwarding: Move several selftests") Signed-off-by: Ido Schimmel <idosch(a)nvidia.com> Signed-off-by: Petr Machata <petrm(a)nvidia.com> --- tools/testing/selftests/drivers/net/mlxsw/ethtool_lanes.sh | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/mlxsw/ethtool_lanes.sh b/tools/testing/selftests/drivers/net/mlxsw/ethtool_lanes.sh index 877cd6df94a1..fe905a7f34b3 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/ethtool_lanes.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/ethtool_lanes.sh @@ -2,6 +2,7 @@ # SPDX-License-Identifier: GPL-2.0 lib_dir=$(dirname $0)/../../../net/forwarding +ethtool_lib_dir=$(dirname $0)/../hw ALL_TESTS=" autoneg @@ -11,7 +12,7 @@ ALL_TESTS=" NUM_NETIFS=2 : ${TIMEOUT:=30000} # ms source $lib_dir/lib.sh -source $lib_dir/ethtool_lib.sh +source $ethtool_lib_dir/ethtool_lib.sh setup_prepare() { -- 2.45.0

1 year, 3 months

3
2
0 0

[PATCH net-next v6] net: netconsole: selftests: Create a new netconsole selftest

by Breno Leitao

Adds a selftest that creates two virtual interfaces, assigns one to a new namespace, and assigns IP addresses to both. It listens on the destination interface using socat and configures a dynamic target on netconsole, pointing to the destination IP address. The test then checks if the message was received properly on the destination interface. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- Changelog: v6: * Check for SRC and DST ip before starting the test (Jakub) * Revert the printk configuration at the end of the test (Jakub) * Fix the modprobe stderr redirection (Jakub) v5: * Replace check_file_size() by "test -s" (Matthieu) * https://lore.kernel.org/all/20240819090406.1441297-1-leitao@debian.org/#t v4: * Avoid sleeping in waiting for sockets and files (Matthieu Baerts) * Some other improvements (Matthieu Baerts) * Add configfs as a dependency (Jakub) * https://lore.kernel.org/all/20240816132450.346744-1-leitao@debian.org/ v3: * Defined CONFIGs in config file (Jakub) * Identention fixes (Petr Machata) * Use setup_ns in a better way (Matthieu Baerts) * Add dependencies in TEST_INCLUDES (Hangbin Liu) * https://lore.kernel.org/all/20240815095157.3064722-1-leitao@debian.org/ v2: * Change the location of the path (Jakub) * Move from veth to netdevsim * Other small changes in dependency checks and cleanup * https://lore.kernel.org/all/20240813183825.837091-1-leitao@debian.org/ v1: * https://lore.kernel.org/all/ZqyUHN770pjSofTC@gmail.com/ MAINTAINERS | 1 + tools/testing/selftests/drivers/net/Makefile | 5 +- tools/testing/selftests/drivers/net/config | 4 + .../selftests/drivers/net/netcons_basic.sh | 234 ++++++++++++++++++ 4 files changed, 243 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/drivers/net/netcons_basic.sh diff --git a/MAINTAINERS b/MAINTAINERS index 5dbf23cf11c8..9a371ddd8719 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15772,6 +15772,7 @@ M: Breno Leitao <leitao(a)debian.org> S: Maintained F: Documentation/networking/netconsole.rst F: drivers/net/netconsole.c +F: tools/testing/selftests/drivers/net/netcons_basic.sh NETDEVSIM M: Jakub Kicinski <kuba(a)kernel.org> diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index e54f382bcb02..39fb97a8c1df 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -1,8 +1,11 @@ # SPDX-License-Identifier: GPL-2.0 -TEST_INCLUDES := $(wildcard lib/py/*.py) +TEST_INCLUDES := $(wildcard lib/py/*.py) \ + ../../net/net_helper.sh \ + ../../net/lib.sh \ TEST_PROGS := \ + netcons_basic.sh \ ping.py \ queues.py \ stats.py \ diff --git a/tools/testing/selftests/drivers/net/config b/tools/testing/selftests/drivers/net/config index f6a58ce8a230..a2d8af60876d 100644 --- a/tools/testing/selftests/drivers/net/config +++ b/tools/testing/selftests/drivers/net/config @@ -1,2 +1,6 @@ CONFIG_IPV6=y CONFIG_NETDEVSIM=m +CONFIG_CONFIGFS_FS=y +CONFIG_NETCONSOLE=m +CONFIG_NETCONSOLE_DYNAMIC=y +CONFIG_NETCONSOLE_EXTENDED_LOG=y diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh new file mode 100755 index 000000000000..b4bfb451ccb6 --- /dev/null +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -0,0 +1,234 @@ +#!/usr/bin/env bash +# SPDX-License-Identifier: GPL-2.0 + +# This test creates two netdevsim virtual interfaces, assigns one of them (the +# "destination interface") to a new namespace, and assigns IP addresses to both +# interfaces. +# +# It listens on the destination interface using socat and configures a dynamic +# target on netconsole, pointing to the destination IP address. +# +# Finally, it checks whether the message was received properly on the +# destination interface. Note that this test may pollute the kernel log buffer +# (dmesg) and relies on dynamic configuration and namespaces being configured. +# +# Author: Breno Leitao <leitao(a)debian.org> + +set -euo pipefail + +SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") + +# Simple script to test dynamic targets in netconsole +SRCIF="" # to be populated later +SRCIP=192.168.1.1 +DSTIF="" # to be populated later +DSTIP=192.168.1.2 + +PORT="6666" +MSG="netconsole selftest" +TARGET=$(mktemp -u netcons_XXXXX) +DEFAULT_PRINTK_VALUES=$(cat /proc/sys/kernel/printk) +NETCONS_CONFIGFS="/sys/kernel/config/netconsole" +NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}" +# NAMESPACE will be populated by setup_ns with a random value +NAMESPACE="" + +# IDs for netdevsim +NSIM_DEV_1_ID=$((256 + RANDOM % 256)) +NSIM_DEV_2_ID=$((512 + RANDOM % 256)) + +# Used to create and delete namespaces +source "${SCRIPTDIR}"/../../net/lib.sh +source "${SCRIPTDIR}"/../../net/net_helper.sh + +# Create netdevsim interfaces +create_ifaces() { + local NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device + + echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_NEW" + echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_NEW" + udevadm settle 2> /dev/null || true + + local NSIM1=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_1_ID" + local NSIM2=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_2_ID" + + # These are global variables + SRCIF=$(find "$NSIM1"/net -maxdepth 1 -type d ! \ + -path "$NSIM1"/net -exec basename {} \;) + DSTIF=$(find "$NSIM2"/net -maxdepth 1 -type d ! \ + -path "$NSIM2"/net -exec basename {} \;) +} + +link_ifaces() { + local NSIM_DEV_SYS_LINK="/sys/bus/netdevsim/link_device" + local SRCIF_IFIDX=$(cat /sys/class/net/"$SRCIF"/ifindex) + local DSTIF_IFIDX=$(cat /sys/class/net/"$DSTIF"/ifindex) + + exec {NAMESPACE_FD}</var/run/netns/"${NAMESPACE}" + exec {INITNS_FD}</proc/self/ns/net + + # Bind the dst interface to namespace + ip link set "${DSTIF}" netns "${NAMESPACE}" + + # Linking one device to the other one (on the other namespace} + if ! echo "${INITNS_FD}:$SRCIF_IFIDX $NAMESPACE_FD:$DSTIF_IFIDX" > $NSIM_DEV_SYS_LINK + then + echo "linking netdevsim1 with netdevsim2 should succeed" + cleanup + exit "${ksft_skip}" + fi +} + +function configure_ip() { + # Configure the IPs for both interfaces + ip netns exec "${NAMESPACE}" ip addr add "${DSTIP}"/24 dev "${DSTIF}" + ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" up + + ip addr add "${SRCIP}"/24 dev "${SRCIF}" + ip link set "${SRCIF}" up +} + +function set_network() { + # setup_ns function is coming from lib.sh + setup_ns NAMESPACE + + # Create both interfaces, and assign the destination to a different + # namespace + create_ifaces + + # Link both interfaces back to back + link_ifaces + + configure_ip +} + +function create_dynamic_target() { + DSTMAC=$(ip netns exec "${NAMESPACE}" \ + ip link show "${DSTIF}" | awk '/ether/ {print $2}') + + # Create a dynamic target + mkdir "${NETCONS_PATH}" + + echo "${DSTIP}" > "${NETCONS_PATH}"/remote_ip + echo "${SRCIP}" > "${NETCONS_PATH}"/local_ip + echo "${DSTMAC}" > "${NETCONS_PATH}"/remote_mac + echo "${SRCIF}" > "${NETCONS_PATH}"/dev_name + + echo 1 > "${NETCONS_PATH}"/enabled +} + +function cleanup() { + local NSIM_DEV_SYS_DEL="/sys/bus/netdevsim/del_device" + + # delete netconsole dynamic reconfiguration + echo 0 > "${NETCONS_PATH}"/enabled + # Remove the configfs entry + rmdir "${NETCONS_PATH}" + + # Delete netdevsim devices + echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_DEL" + echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_DEL" + + # this is coming from lib.sh + cleanup_all_ns + + # Restoring printk configurations + echo "${DEFAULT_PRINTK_VALUES}" > /proc/sys/kernel/printk +} + +function listen_port_and_save_to() { + local OUTPUT=${1} + # Just wait for 2 seconds + timeout 2 ip netns exec "${NAMESPACE}" \ + socat UDP-LISTEN:"${PORT}",fork "${OUTPUT}" +} + +function validate_result() { + local TMPFILENAME="$1" + + # Check if the file exists + if [ ! -f "$TMPFILENAME" ]; then + echo "FAIL: File was not generated." >&2 + exit "${ksft_fail}" + fi + + if ! grep -q "${MSG}" "${TMPFILENAME}"; then + echo "FAIL: ${MSG} not found in ${TMPFILENAME}" >&2 + cat "${TMPFILENAME}" >&2 + exit "${ksft_fail}" + fi + + # Delete the file once it is validated, otherwise keep it + # for debugging purposes + rm "${TMPFILENAME}" + exit "${ksft_pass}" +} + +function check_for_dependencies() { + if [ "$(id -u)" -ne 0 ]; then + echo "This test must be run as root" >&2 + exit "${ksft_skip}" + fi + + if ! which socat > /dev/null ; then + echo "SKIP: socat(1) is not available" >&2 + exit "${ksft_skip}" + fi + + if ! which ip > /dev/null ; then + echo "SKIP: ip(1) is not available" >&2 + exit "${ksft_skip}" + fi + + if ! which udevadm > /dev/null ; then + echo "SKIP: udevadm(1) is not available" >&2 + exit "${ksft_skip}" + fi + + if [ ! -d "${NETCONS_CONFIGFS}" ]; then + echo "SKIP: directory ${NETCONS_CONFIGFS} does not exist. Check if NETCONSOLE_DYNAMIC is enabled" >&2 + exit "${ksft_skip}" + fi + + if ip link show "${DSTIF}" 2> /dev/null; then + echo "SKIP: interface ${DSTIF} exists in the system. Not overwriting it." >&2 + exit "${ksft_skip}" + fi + + if ip addr list | grep -E "inet.*(${SRCIP}|${DSTIP})" 2> /dev/null; then + echo "SKIP: IPs already in use. Skippig it" >&2 + exit "${ksft_skip}" + fi +} + +# ========== # +# Start here # +# ========== # +modprobe netdevsim 2> /dev/null || true +modprobe netconsole 2> /dev/null || true + +# The content of kmsg will be save to the following file +OUTPUT_FILE="/tmp/${TARGET}" + +# Check for basic system dependency and exit if not found +check_for_dependencies +# Set current loglevel to KERN_INFO(6), and default to KERN_NOTICE(5) +echo "6 5" > /proc/sys/kernel/printk +# Remove the namespace, interfaces and netconsole target on exit +trap cleanup EXIT +# Create one namespace and two interfaces +set_network +# Create a dynamic target for netconsole +create_dynamic_target +# Listed for netconsole port inside the namespace and destination interface +listen_port_and_save_to "${OUTPUT_FILE}" & +# Wait for socat to start and listen to the port. +wait_local_port_listen "${NAMESPACE}" "${PORT}" udp +# Send the message +echo "${MSG}: ${TARGET}" > /dev/kmsg +# Wait until socat saves the file to disk +busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" + +# Make sure the message was received in the dst part +# and exit +validate_result "${OUTPUT_FILE}" -- 2.43.5

1 year, 3 months

3
2
0 0

[PATCH v3 0/7] mm: Optimize mseal checks

by Pedro Falcato

[based on mm-unstable, 651c8c1d7359] Optimize mseal checks by removing the separate can_modify_mm() step, and just doing checks on the individual vmas, when various operations are themselves iterating through the tree. This provides a nice speedup and restores performance parity with pre-mseal[3]. This series also depends on the powerpc series that removes arch_unmap[2]. This series is already in mm-unstable. will-it-scale mmap1_process[1] -t 1 results: commit 3450fe2b574b4345e4296ccae395149e1a357fee: min:277605 max:277605 total:277605 min:281784 max:281784 total:281784 min:277238 max:277238 total:277238 min:281761 max:281761 total:281761 min:274279 max:274279 total:274279 min:254854 max:254854 total:254854 measurement min:269143 max:269143 total:269143 min:270454 max:270454 total:270454 min:243523 max:243523 total:243523 min:251148 max:251148 total:251148 min:209669 max:209669 total:209669 min:190426 max:190426 total:190426 min:231219 max:231219 total:231219 min:275364 max:275364 total:275364 min:266540 max:266540 total:266540 min:242572 max:242572 total:242572 min:284469 max:284469 total:284469 min:278882 max:278882 total:278882 min:283269 max:283269 total:283269 min:281204 max:281204 total:281204 After this patch set: min:280580 max:280580 total:280580 min:290514 max:290514 total:290514 min:291006 max:291006 total:291006 min:290352 max:290352 total:290352 min:294582 max:294582 total:294582 min:293075 max:293075 total:293075 measurement min:295613 max:295613 total:295613 min:294070 max:294070 total:294070 min:293193 max:293193 total:293193 min:291631 max:291631 total:291631 min:295278 max:295278 total:295278 min:293782 max:293782 total:293782 min:290361 max:290361 total:290361 min:294517 max:294517 total:294517 min:293750 max:293750 total:293750 min:293572 max:293572 total:293572 min:295239 max:295239 total:295239 min:292932 max:292932 total:292932 min:293319 max:293319 total:293319 min:294954 max:294954 total:294954 This was a Completely Unscientific test but seems to show there were around 5-10% gains on ops per second. Oliver performed his own tests and showed[3] a similar ~5% gain in them. [1]: mmap1_process does mmap and munmap in a loop. I didn't bother testing multithreading cases. [2]: https://lore.kernel.org/all/20240807124103.85644-1-mpe@ellerman.id.au/ [3]: https://lore.kernel.org/all/ZrMMJfe9aXSWxJz6@xsang-OptiPlex-9020/ Link: https://lore.kernel.org/all/202408041602.caa0372-oliver.sang@intel.com/ Changes in v3: - Moved can_modify_vma to vma.h instead of internal.h (Lorenzo) - Fixed a bug in munmap where we used the wrong VMA pointer - Added tests for the previous munmap bug - Moved the mremap source vma check upwards, to stop us from unmapping dest while the source is sealed (Liam) Changes in v2: - Rebased on top of mm-unstable - Removed a superfluous check in mremap (Jeff Xu) Signed-off-by: Pedro Falcato <pedro.falcato(a)gmail.com> --- Pedro Falcato (7): mm: Move can_modify_vma to mm/vma.h mm/munmap: Replace can_modify_mm with can_modify_vma mm/mprotect: Replace can_modify_mm with can_modify_vma mm/mremap: Replace can_modify_mm with can_modify_vma mseal: Replace can_modify_mm_madv with a vma variant mm: Remove can_modify_mm() selftests/mm: add more mseal traversal tests mm/internal.h | 16 ----- mm/madvise.c | 13 +--- mm/mmap.c | 11 +--- mm/mprotect.c | 12 +--- mm/mremap.c | 32 ++------- mm/mseal.c | 55 ++-------------- mm/vma.c | 19 ++++-- mm/vma.h | 35 ++++++++++ tools/testing/selftests/mm/mseal_test.c | 111 +++++++++++++++++++++++++++++++- 9 files changed, 174 insertions(+), 130 deletions(-) --- base-commit: 651c8c1d735983040bec4f71d0e2e690f3c0fc2d change-id: 20240816-mseal-depessimize-f39d9f4c32c6 Best regards, -- Pedro Falcato <pedro.falcato(a)gmail.com>

1 year, 3 months

4
35
0 0

[PATCH net-next v19 03/13] netdev: support binding dma-buf to netdevice

by Mina Almasry

Add a netdev_dmabuf_binding struct which represents the dma-buf-to-netdevice binding. The netlink API will bind the dma-buf to rx queues on the netdevice. On the binding, the dma_buf_attach & dma_buf_map_attachment will occur. The entries in the sg_table from mapping will be inserted into a genpool to make it ready for allocation. The chunks in the genpool are owned by a dmabuf_chunk_owner struct which holds the dma-buf offset of the base of the chunk and the dma_addr of the chunk. Both are needed to use allocations that come from this chunk. We create a new type that represents an allocation from the genpool: net_iov. We setup the net_iov allocation size in the genpool to PAGE_SIZE for simplicity: to match the PAGE_SIZE normally allocated by the page pool and given to the drivers. The user can unbind the dmabuf from the netdevice by closing the netlink socket that established the binding. We do this so that the binding is automatically unbound even if the userspace process crashes. The binding and unbinding leaves an indicator in struct netdev_rx_queue that the given queue is bound, and the binding is actuated by resetting the rx queue using the queue API. The netdev_dmabuf_binding struct is refcounted, and releases its resources only when all the refs are released. Signed-off-by: Willem de Bruijn <willemb(a)google.com> Signed-off-by: Kaiyuan Zhang <kaiyuanz(a)google.com> Signed-off-by: Mina Almasry <almasrymina(a)google.com> Reviewed-by: Pavel Begunkov <asml.silence(a)gmail.com> # excluding netlink Acked-by: Daniel Vetter <daniel.vetter(a)ffwll.ch> --- v19: - Prevent deactivating queues bound to mp (Jakub). - disable attaching xdp to memory provider netdev (Jakub). - Address various nits from Jakub. - In the netlink API, check for presence of queue_id, queue_type and that the queue_type is RX (Jakub). v17: - Add missing kfree(owner) (Jakub) - Fix issue found by Taehee, where may access an rxq that has already been freed if the driver has been unloaded in the meantime (thanks!) v16: - Fix rtnl_lock() not being acquired on unbind path (Reported by Taehee). - Use unlocked versions of dma_buf_[un]map_attachment (Reported by Taehee). - Use real_num_rx_queues instead of num_rx_queues (Taehee). - bound_rxq_list -> bound_rxqs (Jakub). - Removed READ_ONCE/WRITE_ONCE infavor of rtnl_lock() sync. (Jakub). - Use ERR_CAST instead of out param (Jakub). - Add NULL Check for kzalloc_node() call (Paolo). - Move genl_sk_priv_get, genlmsg_new, genlmsg_input outside of the lock acquisition (Jakub). - Add netif_device_present() check (Jakub). - Use nla_for_each_attr_type(Jakub). v13: - Fixed a couple of places that still listed DMA_BIDIRECTIONAL (Pavel). - Added reviewed-by from Pavel. v11: - Fix build error with CONFIG_DMA_SHARED_BUFFER && !CONFIG_GENERIC_ALLOCATOR - Rebased on top of no memory provider ops. v10: - Moved net_iov_dma_addr() to devmem.h and made it devmem specific helper (David). v9: https://lore.kernel.org/all/20240403002053.2376017-5-almasrymina@google.com/ - Removed net_devmem_restart_rx_queues and put it in its own patch (David). v8: - move dmabuf_devmem_ops usage to later patch to avoid patch-by-patch build error. v7: - Use IS_ERR() instead of IS_ERR_OR_NULL() for the dma_buf_get() return value. - Changes netdev_* naming in devmem.c to net_devmem_* (Yunsheng). - DMA_BIDIRECTIONAL -> DMA_FROM_DEVICE (Yunsheng). - Added a comment around recovering of the old rx queue in net_devmem_restart_rx_queue(), and added freeing of old_mem if the restart of the old queue fails. (Yunsheng). - Use kernel-family sock-priv (Jakub). - Put pp_memory_provider_params in netdev_rx_queue instead of the dma-buf specific binding (Pavel & David). - Move queue management ops to queue_mgmt_ops instead of netdev_ops (Jakub). - Remove excess whitespaces (Jakub). - Use genlmsg_iput (Jakub). v6: - Validate rx queue index - Refactor new functions into devmem.c (Pavel) v5: - Renamed page_pool_iov to net_iov, and moved that support to devmem.h or netmem.h. v1: - Introduce devmem.h instead of bloating netdevice.h (Jakub) - ENOTSUPP -> EOPNOTSUPP (checkpatch.pl I think) - Remove unneeded rcu protection for binding->list (rtnl protected) - Removed extraneous err_binding_put: label. - Removed dma_addr += len (Paolo). - Don't override err on netdev_bind_dmabuf_to_queue failure. - Rename devmem -> dmabuf (David). - Add id to dmabuf binding (David/Stan). - Fix missing xa_destroy bound_rq_list. - Use queue api to reset bound RX queues (Jakub). - Update netlink API for rx-queue type (tx/re) (Jakub). RFC v3: - Support multi rx-queue binding --- Documentation/netlink/specs/netdev.yaml | 4 + include/linux/netdevice.h | 2 + include/net/devmem.h | 115 +++++++++++ include/net/netdev_rx_queue.h | 2 + include/net/netmem.h | 10 + include/net/page_pool/types.h | 6 + net/core/Makefile | 2 +- net/core/dev.c | 22 ++ net/core/devmem.c | 262 ++++++++++++++++++++++++ net/core/netdev-genl-gen.c | 4 + net/core/netdev-genl-gen.h | 4 + net/core/netdev-genl.c | 117 ++++++++++- net/ethtool/common.c | 9 + 13 files changed, 556 insertions(+), 3 deletions(-) create mode 100644 include/net/devmem.h create mode 100644 net/core/devmem.c diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml index 4930e8142aa6..0c747530c275 100644 --- a/Documentation/netlink/specs/netdev.yaml +++ b/Documentation/netlink/specs/netdev.yaml @@ -667,6 +667,10 @@ operations: attributes: - id +kernel-family: + headers: [ "linux/list.h"] + sock-priv: struct list_head + mcast-groups: list: - diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 0ef3eaa23f4b..1c92d6a6e1fc 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3920,6 +3920,8 @@ int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); u8 dev_xdp_prog_count(struct net_device *dev); u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode); +int dev_get_max_mp_channel(const struct net_device *dev); + int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb); diff --git a/include/net/devmem.h b/include/net/devmem.h new file mode 100644 index 000000000000..c7bd6a0a6b9e --- /dev/null +++ b/include/net/devmem.h @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Device memory TCP support + * + * Authors: Mina Almasry <almasrymina(a)google.com> + * Willem de Bruijn <willemb(a)google.com> + * Kaiyuan Zhang <kaiyuanz(a)google.com> + * + */ +#ifndef _NET_DEVMEM_H +#define _NET_DEVMEM_H + +struct net_devmem_dmabuf_binding { + struct dma_buf *dmabuf; + struct dma_buf_attachment *attachment; + struct sg_table *sgt; + struct net_device *dev; + struct gen_pool *chunk_pool; + + /* The user holds a ref (via the netlink API) for as long as they want + * the binding to remain alive. Each page pool using this binding holds + * a ref to keep the binding alive. Each allocated net_iov holds a + * ref. + * + * The binding undos itself and unmaps the underlying dmabuf once all + * those refs are dropped and the binding is no longer desired or in + * use. + */ + refcount_t ref; + + /* The list of bindings currently active. Used for netlink to notify us + * of the user dropping the bind. + */ + struct list_head list; + + /* rxq's this binding is active on. */ + struct xarray bound_rxqs; + + /* ID of this binding. Globally unique to all bindings currently + * active. + */ + u32 id; +}; + +/* Owner of the dma-buf chunks inserted into the gen pool. Each scatterlist + * entry from the dmabuf is inserted into the genpool as a chunk, and needs + * this owner struct to keep track of some metadata necessary to create + * allocations from this chunk. + */ +struct dmabuf_genpool_chunk_owner { + /* Offset into the dma-buf where this chunk starts. */ + unsigned long base_virtual; + + /* dma_addr of the start of the chunk. */ + dma_addr_t base_dma_addr; + + /* Array of net_iovs for this chunk. */ + struct net_iov *niovs; + size_t num_niovs; + + struct net_devmem_dmabuf_binding *binding; +}; + +#if defined(CONFIG_DMA_SHARED_BUFFER) && defined(CONFIG_GENERIC_ALLOCATOR) +void __net_devmem_dmabuf_binding_free(struct net_devmem_dmabuf_binding *binding); +struct net_devmem_dmabuf_binding * +net_devmem_bind_dmabuf(struct net_device *dev, unsigned int dmabuf_fd); +void net_devmem_unbind_dmabuf(struct net_devmem_dmabuf_binding *binding); +int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx, + struct net_devmem_dmabuf_binding *binding); +void dev_dmabuf_uninstall(struct net_device *dev); +#else +static inline void +__net_devmem_dmabuf_binding_free(struct net_devmem_dmabuf_binding *binding) +{ +} + +static inline struct net_devmem_dmabuf_binding * +net_devmem_bind_dmabuf(struct net_device *dev, unsigned int dmabuf_fd) +{ + return ERR_PTR(-EOPNOTSUPP); +} +static inline void +net_devmem_unbind_dmabuf(struct net_devmem_dmabuf_binding *binding) +{ +} + +static inline int +net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx, + struct net_devmem_dmabuf_binding *binding) +{ + return -EOPNOTSUPP; +} + +static inline void dev_dmabuf_uninstall(struct net_device *dev) +{ +} +#endif + +static inline void +net_devmem_dmabuf_binding_get(struct net_devmem_dmabuf_binding *binding) +{ + refcount_inc(&binding->ref); +} + +static inline void +net_devmem_dmabuf_binding_put(struct net_devmem_dmabuf_binding *binding) +{ + if (!refcount_dec_and_test(&binding->ref)) + return; + + __net_devmem_dmabuf_binding_free(binding); +} + +#endif /* _NET_DEVMEM_H */ diff --git a/include/net/netdev_rx_queue.h b/include/net/netdev_rx_queue.h index e78ca52d67fb..ac34f5fb4f71 100644 --- a/include/net/netdev_rx_queue.h +++ b/include/net/netdev_rx_queue.h @@ -6,6 +6,7 @@ #include <linux/netdevice.h> #include <linux/sysfs.h> #include <net/xdp.h> +#include <net/page_pool/types.h> /* This structure contains an instance of an RX queue. */ struct netdev_rx_queue { @@ -25,6 +26,7 @@ struct netdev_rx_queue { * Readers and writers must hold RTNL */ struct napi_struct *napi; + struct pp_memory_provider_params mp_params; } ____cacheline_aligned_in_smp; /* diff --git a/include/net/netmem.h b/include/net/netmem.h index 46cc9b89ac79..41e96c2f94b5 100644 --- a/include/net/netmem.h +++ b/include/net/netmem.h @@ -8,6 +8,16 @@ #ifndef _NET_NETMEM_H #define _NET_NETMEM_H +#include <net/devmem.h> + +/* net_iov */ + +struct net_iov { + struct dmabuf_genpool_chunk_owner *owner; +}; + +/* netmem */ + /** * typedef netmem_ref - a nonexistent type marking a reference to generic * network memory. diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h index 50569fed7868..4afd6dd56351 100644 --- a/include/net/page_pool/types.h +++ b/include/net/page_pool/types.h @@ -139,6 +139,10 @@ struct page_pool_stats { */ #define PAGE_POOL_FRAG_GROUP_ALIGN (4 * sizeof(long)) +struct pp_memory_provider_params { + void *mp_priv; +}; + struct page_pool { struct page_pool_params_fast p; @@ -197,6 +201,8 @@ struct page_pool { */ struct ptr_ring ring; + void *mp_priv; + #ifdef CONFIG_PAGE_POOL_STATS /* recycle stats are per-cpu to avoid locking */ struct page_pool_recycle_stats __percpu *recycle_stats; diff --git a/net/core/Makefile b/net/core/Makefile index f82232b358a2..6b43611fb4a4 100644 --- a/net/core/Makefile +++ b/net/core/Makefile @@ -13,7 +13,7 @@ obj-y += dev.o dev_addr_lists.o dst.o netevent.o \ neighbour.o rtnetlink.o utils.o link_watch.o filter.o \ sock_diag.o dev_ioctl.o tso.o sock_reuseport.o \ fib_notifier.o xdp.o flow_offload.o gro.o \ - netdev-genl.o netdev-genl-gen.o gso.o + netdev-genl.o netdev-genl-gen.o gso.o devmem.o obj-$(CONFIG_NETDEV_ADDR_LIST_TEST) += dev_addr_lists_test.o diff --git a/net/core/dev.c b/net/core/dev.c index 751d9b70e6ad..0a8caf0e4c77 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -158,6 +158,9 @@ #include <net/page_pool/types.h> #include <net/page_pool/helpers.h> #include <net/rps.h> +#include <linux/genalloc.h> +#include <linux/dma-buf.h> +#include <net/devmem.h> #include "dev.h" #include "net-sysfs.h" @@ -9537,6 +9540,10 @@ static int dev_xdp_attach(struct net_device *dev, struct netlink_ext_ack *extack NL_SET_ERR_MSG(extack, "Native and generic XDP can't be active at the same time"); return -EEXIST; } + if (dev_get_max_mp_channel(dev) != -1) { + NL_SET_ERR_MSG(extack, "XDP can't be installed on a netdev using memory providers"); + return -EINVAL; + } if (!offload && bpf_prog_is_offloaded(new_prog->aux)) { NL_SET_ERR_MSG(extack, "Using offloaded program without HW_MODE flag is not supported"); return -EINVAL; @@ -9821,6 +9828,20 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack, return err; } +int dev_get_max_mp_channel(const struct net_device *dev) +{ + int i, max = -1; + + ASSERT_RTNL(); + + for (i = 0; i < dev->real_num_rx_queues; i++) + if (dev->_rx[i].mp_params.mp_priv) + /* The number of queues is the idx plus 1. */ + max = i + 1; + + return max; +} + /** * dev_index_reserve() - allocate an ifindex in a namespace * @net: the applicable net namespace @@ -11335,6 +11356,7 @@ void unregister_netdevice_many_notify(struct list_head *head, dev_tcx_uninstall(dev); dev_xdp_uninstall(dev); bpf_dev_bound_netdev_unregister(dev); + dev_dmabuf_uninstall(dev); netdev_offload_xstats_disable_all(dev); diff --git a/net/core/devmem.c b/net/core/devmem.c new file mode 100644 index 000000000000..1b693424c17d --- /dev/null +++ b/net/core/devmem.c @@ -0,0 +1,262 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Devmem TCP + * + * Authors: Mina Almasry <almasrymina(a)google.com> + * Willem de Bruijn <willemdebruijn.kernel(a)gmail.com> + * Kaiyuan Zhang <kaiyuanz(a)google.com + */ + +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/netdevice.h> +#include <trace/events/page_pool.h> +#include <net/netdev_rx_queue.h> +#include <net/page_pool/types.h> +#include <net/page_pool/helpers.h> +#include <linux/genalloc.h> +#include <linux/dma-buf.h> +#include <net/devmem.h> +#include <net/netdev_queues.h> + +/* Device memory support */ + +/* Protected by rtnl_lock() */ +static DEFINE_XARRAY_FLAGS(net_devmem_dmabuf_bindings, XA_FLAGS_ALLOC1); + +#if defined(CONFIG_DMA_SHARED_BUFFER) && defined(CONFIG_GENERIC_ALLOCATOR) +static void net_devmem_dmabuf_free_chunk_owner(struct gen_pool *genpool, + struct gen_pool_chunk *chunk, + void *not_used) +{ + struct dmabuf_genpool_chunk_owner *owner = chunk->owner; + + kvfree(owner->niovs); + kfree(owner); +} + +void __net_devmem_dmabuf_binding_free(struct net_devmem_dmabuf_binding *binding) +{ + size_t size, avail; + + gen_pool_for_each_chunk(binding->chunk_pool, + net_devmem_dmabuf_free_chunk_owner, NULL); + + size = gen_pool_size(binding->chunk_pool); + avail = gen_pool_avail(binding->chunk_pool); + + if (!WARN(size != avail, "can't destroy genpool. size=%zu, avail=%zu", + size, avail)) + gen_pool_destroy(binding->chunk_pool); + + dma_buf_unmap_attachment_unlocked(binding->attachment, binding->sgt, + DMA_FROM_DEVICE); + dma_buf_detach(binding->dmabuf, binding->attachment); + dma_buf_put(binding->dmabuf); + xa_destroy(&binding->bound_rxqs); + kfree(binding); +} + +void net_devmem_unbind_dmabuf(struct net_devmem_dmabuf_binding *binding) +{ + struct netdev_rx_queue *rxq; + unsigned long xa_idx; + unsigned int rxq_idx; + + if (binding->list.next) + list_del(&binding->list); + + xa_for_each(&binding->bound_rxqs, xa_idx, rxq) { + if (rxq->mp_params.mp_priv == binding) { + rxq->mp_params.mp_priv = NULL; + + rxq_idx = get_netdev_rx_queue_index(rxq); + + WARN_ON(netdev_rx_queue_restart(binding->dev, rxq_idx)); + } + } + + xa_erase(&net_devmem_dmabuf_bindings, binding->id); + + net_devmem_dmabuf_binding_put(binding); +} + +int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx, + struct net_devmem_dmabuf_binding *binding) +{ + struct netdev_rx_queue *rxq; + u32 xa_idx; + int err; + + if (rxq_idx >= dev->real_num_rx_queues) + return -ERANGE; + + rxq = __netif_get_rx_queue(dev, rxq_idx); + if (rxq->mp_params.mp_priv) + return -EEXIST; + + if (dev_xdp_prog_count(dev)) + return -EEXIST; + + err = xa_alloc(&binding->bound_rxqs, &xa_idx, rxq, xa_limit_32b, + GFP_KERNEL); + if (err) + return err; + + rxq->mp_params.mp_priv = binding; + + err = netdev_rx_queue_restart(dev, rxq_idx); + if (err) + goto err_xa_erase; + + return 0; + +err_xa_erase: + rxq->mp_params.mp_priv = NULL; + xa_erase(&binding->bound_rxqs, xa_idx); + + return err; +} + +struct net_devmem_dmabuf_binding *net_devmem_bind_dmabuf(struct net_device *dev, + unsigned int dmabuf_fd) +{ + struct net_devmem_dmabuf_binding *binding; + static u32 id_alloc_next; + struct scatterlist *sg; + struct dma_buf *dmabuf; + unsigned int sg_idx, i; + unsigned long virtual; + int err; + + dmabuf = dma_buf_get(dmabuf_fd); + if (IS_ERR(dmabuf)) + return ERR_CAST(dmabuf); + + binding = kzalloc_node(sizeof(*binding), GFP_KERNEL, + dev_to_node(&dev->dev)); + if (!binding) { + err = -ENOMEM; + goto err_put_dmabuf; + } + + binding->dev = dev; + + err = xa_alloc_cyclic(&net_devmem_dmabuf_bindings, &binding->id, + binding, xa_limit_32b, &id_alloc_next, + GFP_KERNEL); + if (err < 0) + goto err_free_binding; + + xa_init_flags(&binding->bound_rxqs, XA_FLAGS_ALLOC); + + refcount_set(&binding->ref, 1); + + binding->dmabuf = dmabuf; + + binding->attachment = dma_buf_attach(binding->dmabuf, dev->dev.parent); + if (IS_ERR(binding->attachment)) { + err = PTR_ERR(binding->attachment); + goto err_free_id; + } + + binding->sgt = dma_buf_map_attachment_unlocked(binding->attachment, + DMA_FROM_DEVICE); + if (IS_ERR(binding->sgt)) { + err = PTR_ERR(binding->sgt); + goto err_detach; + } + + /* For simplicity we expect to make PAGE_SIZE allocations, but the + * binding can be much more flexible than that. We may be able to + * allocate MTU sized chunks here. Leave that for future work... + */ + binding->chunk_pool = + gen_pool_create(PAGE_SHIFT, dev_to_node(&dev->dev)); + if (!binding->chunk_pool) { + err = -ENOMEM; + goto err_unmap; + } + + virtual = 0; + for_each_sgtable_dma_sg(binding->sgt, sg, sg_idx) { + dma_addr_t dma_addr = sg_dma_address(sg); + struct dmabuf_genpool_chunk_owner *owner; + size_t len = sg_dma_len(sg); + struct net_iov *niov; + + owner = kzalloc_node(sizeof(*owner), GFP_KERNEL, + dev_to_node(&dev->dev)); + if (!owner) { + err = -ENOMEM; + goto err_free_chunks; + } + + owner->base_virtual = virtual; + owner->base_dma_addr = dma_addr; + owner->num_niovs = len / PAGE_SIZE; + owner->binding = binding; + + err = gen_pool_add_owner(binding->chunk_pool, dma_addr, + dma_addr, len, dev_to_node(&dev->dev), + owner); + if (err) { + kfree(owner); + err = -EINVAL; + goto err_free_chunks; + } + + owner->niovs = kvmalloc_array(owner->num_niovs, + sizeof(*owner->niovs), + GFP_KERNEL); + if (!owner->niovs) { + err = -ENOMEM; + goto err_free_chunks; + } + + for (i = 0; i < owner->num_niovs; i++) { + niov = &owner->niovs[i]; + niov->owner = owner; + } + + virtual += len; + } + + return binding; + +err_free_chunks: + gen_pool_for_each_chunk(binding->chunk_pool, + net_devmem_dmabuf_free_chunk_owner, NULL); + gen_pool_destroy(binding->chunk_pool); +err_unmap: + dma_buf_unmap_attachment_unlocked(binding->attachment, binding->sgt, + DMA_FROM_DEVICE); +err_detach: + dma_buf_detach(dmabuf, binding->attachment); +err_free_id: + xa_erase(&net_devmem_dmabuf_bindings, binding->id); +err_free_binding: + kfree(binding); +err_put_dmabuf: + dma_buf_put(dmabuf); + return ERR_PTR(err); +} + +void dev_dmabuf_uninstall(struct net_device *dev) +{ + struct net_devmem_dmabuf_binding *binding; + struct netdev_rx_queue *rxq; + unsigned long xa_idx; + unsigned int i; + + for (i = 0; i < dev->real_num_rx_queues; i++) { + binding = dev->_rx[i].mp_params.mp_priv; + if (!binding) + continue; + + xa_for_each(&binding->bound_rxqs, xa_idx, rxq) + if (rxq == &dev->_rx[i]) + xa_erase(&binding->bound_rxqs, xa_idx); + } +} +#endif diff --git a/net/core/netdev-genl-gen.c b/net/core/netdev-genl-gen.c index 6b7fe6035067..b28424ae06d5 100644 --- a/net/core/netdev-genl-gen.c +++ b/net/core/netdev-genl-gen.c @@ -9,6 +9,7 @@ #include "netdev-genl-gen.h" #include <uapi/linux/netdev.h> +#include <linux/list.h> /* Integer value ranges */ static const struct netlink_range_validation netdev_a_page_pool_id_range = { @@ -187,4 +188,7 @@ struct genl_family netdev_nl_family __ro_after_init = { .n_split_ops = ARRAY_SIZE(netdev_nl_ops), .mcgrps = netdev_nl_mcgrps, .n_mcgrps = ARRAY_SIZE(netdev_nl_mcgrps), + .sock_priv_size = sizeof(struct list_head), + .sock_priv_init = (void *)netdev_nl_sock_priv_init, + .sock_priv_destroy = (void *)netdev_nl_sock_priv_destroy, }; diff --git a/net/core/netdev-genl-gen.h b/net/core/netdev-genl-gen.h index 67c34005750c..8cda334fd042 100644 --- a/net/core/netdev-genl-gen.h +++ b/net/core/netdev-genl-gen.h @@ -10,6 +10,7 @@ #include <net/genetlink.h> #include <uapi/linux/netdev.h> +#include <linux/list.h> /* Common nested types */ extern const struct nla_policy netdev_page_pool_info_nl_policy[NETDEV_A_PAGE_POOL_IFINDEX + 1]; @@ -40,4 +41,7 @@ enum { extern struct genl_family netdev_nl_family; +void netdev_nl_sock_priv_init(struct list_head *priv); +void netdev_nl_sock_priv_destroy(struct list_head *priv); + #endif /* _LINUX_NETDEV_GEN_H */ diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c index 2d726e65211d..88017ee22d2f 100644 --- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -10,6 +10,7 @@ #include <net/netdev_rx_queue.h> #include <net/netdev_queues.h> #include <net/busy_poll.h> +#include <net/devmem.h> #include "netdev-genl-gen.h" #include "dev.h" @@ -721,10 +722,122 @@ int netdev_nl_qstats_get_dumpit(struct sk_buff *skb, return err; } -/* Stub */ int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info) { - return 0; + struct nlattr *tb[ARRAY_SIZE(netdev_queue_id_nl_policy)]; + struct net_devmem_dmabuf_binding *binding; + struct list_head *sock_binding_list; + u32 ifindex, dmabuf_fd, rxq_idx; + struct net_device *netdev; + struct sk_buff *rsp; + struct nlattr *attr; + int rem, err = 0; + void *hdr; + + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_DEV_IFINDEX) || + GENL_REQ_ATTR_CHECK(info, NETDEV_A_DMABUF_FD) || + GENL_REQ_ATTR_CHECK(info, NETDEV_A_DMABUF_QUEUES)) + return -EINVAL; + + ifindex = nla_get_u32(info->attrs[NETDEV_A_DEV_IFINDEX]); + dmabuf_fd = nla_get_u32(info->attrs[NETDEV_A_DMABUF_FD]); + + sock_binding_list = genl_sk_priv_get(&netdev_nl_family, + NETLINK_CB(skb).sk); + if (IS_ERR(sock_binding_list)) + return PTR_ERR(sock_binding_list); + + rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!rsp) + return -ENOMEM; + + hdr = genlmsg_iput(rsp, info); + if (!hdr) { + err = -EMSGSIZE; + goto err_genlmsg_free; + } + + rtnl_lock(); + + netdev = __dev_get_by_index(genl_info_net(info), ifindex); + if (!netdev || !netif_device_present(netdev)) { + err = -ENODEV; + goto err_unlock; + } + + binding = net_devmem_bind_dmabuf(netdev, dmabuf_fd); + if (IS_ERR(binding)) { + err = PTR_ERR(binding); + goto err_unlock; + } + + nla_for_each_attr_type(attr, NETDEV_A_DMABUF_QUEUES, + genlmsg_data(info->genlhdr), + genlmsg_len(info->genlhdr), rem) { + err = nla_parse_nested( + tb, ARRAY_SIZE(netdev_queue_id_nl_policy) - 1, attr, + netdev_queue_id_nl_policy, info->extack); + if (err < 0) + goto err_unbind; + + if (NL_REQ_ATTR_CHECK(info->extack, attr, tb, + NETDEV_A_QUEUE_ID)) { + err = -EINVAL; + goto err_unlock; + } + + if (NL_REQ_ATTR_CHECK(info->extack, attr, tb, + NETDEV_A_QUEUE_TYPE)) { + err = -EINVAL; + goto err_unlock; + } + + if (nla_get_u32(tb[NETDEV_A_QUEUE_TYPE]) != + NETDEV_QUEUE_TYPE_RX) { + err = -EINVAL; + goto err_unlock; + } + + rxq_idx = nla_get_u32(tb[NETDEV_A_QUEUE_ID]); + + err = net_devmem_bind_dmabuf_to_queue(netdev, rxq_idx, binding); + if (err) + goto err_unbind; + } + + list_add(&binding->list, sock_binding_list); + + rtnl_unlock(); + + nla_put_u32(rsp, NETDEV_A_DMABUF_ID, binding->id); + genlmsg_end(rsp, hdr); + + return genlmsg_reply(rsp, info); + +err_unbind: + net_devmem_unbind_dmabuf(binding); +err_unlock: + rtnl_unlock(); +err_genlmsg_free: + nlmsg_free(rsp); + return err; +} + +void netdev_nl_sock_priv_init(struct list_head *priv) +{ + INIT_LIST_HEAD(priv); +} + +void netdev_nl_sock_priv_destroy(struct list_head *priv) +{ + struct net_devmem_dmabuf_binding *binding; + struct net_devmem_dmabuf_binding *temp; + + list_for_each_entry_safe(binding, temp, priv, list) { + rtnl_lock(); + net_devmem_unbind_dmabuf(binding); + rtnl_unlock(); + } } static int netdev_genl_netdevice_event(struct notifier_block *nb, diff --git a/net/ethtool/common.c b/net/ethtool/common.c index 7257ae272296..84c63113951c 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -5,6 +5,7 @@ #include <linux/phy.h> #include <linux/rtnetlink.h> #include <linux/ptp_clock_kernel.h> +#include <net/netdev_rx_queue.h> #include "netlink.h" #include "common.h" @@ -657,6 +658,7 @@ int ethtool_check_max_channel(struct net_device *dev, { u64 max_rxnfc_in_use; u32 max_rxfh_in_use; + int max_mp_in_use; /* ensure the new Rx count fits within the configured Rx flow * indirection table/rxnfc settings @@ -675,6 +677,13 @@ int ethtool_check_max_channel(struct net_device *dev, return -EINVAL; } + max_mp_in_use = dev_get_max_mp_channel(dev); + if (channels.combined_count + channels.rx_count <= max_mp_in_use) { + if (info) + GENL_SET_ERR_MSG_FMT(info, "requested channel counts are too low for existing memory provider setting (%d)", max_mp_in_use); + return -EINVAL; + } + return 0; } -- 2.46.0.76.ge559c4bf1a-goog

1 year, 3 months

3
13
0 0

[PATCH bpf-next v2 0/2] selftests/bpf: new MPTCP subflow subtest

by Matthieu Baerts (NGI0)

In this series from Geliang, modifying MPTCP BPF selftests, we have: - A new MPTCP subflow BPF program setting socket options per subflow: it looks better to have this old test program in the BPF selftests to track regressions and to serve as example. Note: Nicolas is no longer working for Tessares, but he did this work while working for them, and his email address is no longer available. - A new MPTCP BPF subtest validating this new BPF program. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v2: - Previous patches 1/4 and 2/4 have been dropped from this series: - 1/4: "selftests/bpf: Handle SIGINT when creating netns": - A new version, more generic and no longer specific to MPTCP BPF selftest will be sent later, as part of a new series. (Alexei) - 2/4: "selftests/bpf: Add RUN_MPTCP_TEST macro": - Removed, not to hide helper functions in macros. (Alexei) - The commit message of patch 1/2 has been clarified to avoid some possible confusions spot by Alexei. - Link to v1: https://lore.kernel.org/r/20240507-upstream-bpf-next-20240506-mptcp-subflow… --- Geliang Tang (1): selftests/bpf: Add mptcp subflow subtest Nicolas Rybowski (1): selftests/bpf: Add mptcp subflow example tools/testing/selftests/bpf/prog_tests/mptcp.c | 109 ++++++++++++++++++++++ tools/testing/selftests/bpf/progs/mptcp_subflow.c | 70 ++++++++++++++ 2 files changed, 179 insertions(+) --- base-commit: 009367099eb61a4fc2af44d4eb06b6b4de7de6db change-id: 20240506-upstream-bpf-next-20240506-mptcp-subflow-test-faef6654bfa3 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

1 year, 3 months

4
6
0 0

[PATCH RFT v10 0/8] fork: Support shadow stacks in clone3()

by Mark Brown

The kernel has recently added support for shadow stacks, currently x86 only using their CET feature but both arm64 and RISC-V have equivalent features (GCS and Zicfiss respectively), I am actively working on GCS[1]. With shadow stacks the hardware maintains an additional stack containing only the return addresses for branch instructions which is not generally writeable by userspace and ensures that any returns are to the recorded addresses. This provides some protection against ROP attacks and making it easier to collect call stacks. These shadow stacks are allocated in the address space of the userspace process. Our API for shadow stacks does not currently offer userspace any flexiblity for managing the allocation of shadow stacks for newly created threads, instead the kernel allocates a new shadow stack with the same size as the normal stack whenever a thread is created with the feature enabled. The stacks allocated in this way are freed by the kernel when the thread exits or shadow stacks are disabled for the thread. This lack of flexibility and control isn't ideal, in the vast majority of cases the shadow stack will be over allocated and the implicit allocation and deallocation is not consistent with other interfaces. As far as I can tell the interface is done in this manner mainly because the shadow stack patches were in development since before clone3() was implemented. Since clone3() is readily extensible let's add support for specifying a shadow stack when creating a new thread or process in a similar manner to how the normal stack is specified, keeping the current implicit allocation behaviour if one is not specified either with clone3() or through the use of clone(). The user must provide a shadow stack address and size, this must point to memory mapped for use as a shadow stackby map_shadow_stack() with a shadow stack token at the top of the stack. Please note that the x86 portions of this code are build tested only, I don't appear to have a system that can run CET avaible to me, I have done testing with an integration into my pending work for GCS. There is some possibility that the arm64 implementation may require the use of clone3() and explicit userspace allocation of shadow stacks, this is still under discussion. Please further note that the token consumption done by clone3() is not currently implemented in an atomic fashion, Rick indicated that he would look into fixing this if people are OK with the implementation. A new architecture feature Kconfig option for shadow stacks is added as here, this was suggested as part of the review comments for the arm64 GCS series and since we need to detect if shadow stacks are supported it seemed sensible to roll it in here. [1] https://lore.kernel.org/r/20231009-arm64-gcs-v6-0-78e55deaa4dd@kernel.org/ Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v10: - Integrate fixes & improvements for the x86 implementation from Rick Edgecombe. - Require that the shadow stack be VM_WRITE. - Require that the shadow stack base and size be sizeof(void *) aligned. - Clean up trailing newline. - Link to v9: https://lore.kernel.org/r/20240819-clone3-shadow-stack-v9-0-962d74f99464@ke… Changes in v9: - Pull token validation earlier and report problems with an error return to parent rather than signal delivery to the child. - Verify that the top of the supplied shadow stack is VM_SHADOW_STACK. - Rework token validation to only do the page mapping once. - Drop no longer needed support for testing for signals in selftest. - Fix typo in comments. - Link to v8: https://lore.kernel.org/r/20240808-clone3-shadow-stack-v8-0-0acf37caf14c@ke… Changes in v8: - Fix token verification with user specified shadow stack. - Don't track user managed shadow stacks for child processes. - Link to v7: https://lore.kernel.org/r/20240731-clone3-shadow-stack-v7-0-a9532eebfb1d@ke… Changes in v7: - Rebase onto v6.11-rc1. - Typo fixes. - Link to v6: https://lore.kernel.org/r/20240623-clone3-shadow-stack-v6-0-9ee7783b1fb9@ke… Changes in v6: - Rebase onto v6.10-rc3. - Ensure we don't try to free the parent shadow stack in error paths of x86 arch code. - Spelling fixes in userspace API document. - Additional cleanups and improvements to the clone3() tests to support the shadow stack tests. - Link to v5: https://lore.kernel.org/r/20240203-clone3-shadow-stack-v5-0-322c69598e4b@ke… Changes in v5: - Rebase onto v6.8-rc2. - Rework ABI to have the user allocate the shadow stack memory with map_shadow_stack() and a token. - Force inlining of the x86 shadow stack enablement. - Move shadow stack enablement out into a shared header for reuse by other tests. - Link to v4: https://lore.kernel.org/r/20231128-clone3-shadow-stack-v4-0-8b28ffe4f676@ke… Changes in v4: - Formatting changes. - Use a define for minimum shadow stack size and move some basic validation to fork.c. - Link to v3: https://lore.kernel.org/r/20231120-clone3-shadow-stack-v3-0-a7b8ed3e2acc@ke… Changes in v3: - Rebase onto v6.7-rc2. - Remove stale shadow_stack in internal kargs. - If a shadow stack is specified unconditionally use it regardless of CLONE_ parameters. - Force enable shadow stacks in the selftest. - Update changelogs for RISC-V feature rename. - Link to v2: https://lore.kernel.org/r/20231114-clone3-shadow-stack-v2-0-b613f8681155@ke… Changes in v2: - Rebase onto v6.7-rc1. - Remove ability to provide preallocated shadow stack, just specify the desired size. - Link to v1: https://lore.kernel.org/r/20231023-clone3-shadow-stack-v1-0-d867d0b5d4d0@ke… --- Mark Brown (8): Documentation: userspace-api: Add shadow stack API documentation selftests: Provide helper header for shadow stack testing mm: Introduce ARCH_HAS_USER_SHADOW_STACK fork: Add shadow stack support to clone3() selftests/clone3: Remove redundant flushes of output streams selftests/clone3: Factor more of main loop into test_clone3() selftests/clone3: Allow tests to flag if -E2BIG is a valid error code selftests/clone3: Test shadow stack support Documentation/userspace-api/index.rst | 1 + Documentation/userspace-api/shadow_stack.rst | 41 ++++ arch/x86/Kconfig | 1 + arch/x86/include/asm/shstk.h | 11 +- arch/x86/kernel/process.c | 2 +- arch/x86/kernel/shstk.c | 96 ++++++-- fs/proc/task_mmu.c | 2 +- include/asm-generic/cacheflush.h | 11 + include/linux/mm.h | 2 +- include/linux/sched/task.h | 18 ++ include/uapi/linux/sched.h | 13 +- kernel/fork.c | 121 ++++++++++- mm/Kconfig | 6 + tools/testing/selftests/clone3/clone3.c | 254 ++++++++++++++++++---- tools/testing/selftests/clone3/clone3_selftests.h | 40 +++- tools/testing/selftests/ksft_shstk.h | 61 ++++++ 16 files changed, 593 insertions(+), 87 deletions(-) --- base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b change-id: 20231019-clone3-shadow-stack-15d40d2bf536 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year, 3 months

1
8
0 0

[PATCH v10 00/40] arm64/gcs: Provide support for GCS in userspace

by Mark Brown

The arm64 Guarded Control Stack (GCS) feature provides support for hardware protected stacks of return addresses, intended to provide hardening against return oriented programming (ROP) attacks and to make it easier to gather call stacks for applications such as profiling. When GCS is active a secondary stack called the Guarded Control Stack is maintained, protected with a memory attribute which means that it can only be written with specific GCS operations. The current GCS pointer can not be directly written to by userspace. When a BL is executed the value stored in LR is also pushed onto the GCS, and when a RET is executed the top of the GCS is popped and compared to LR with a fault being raised if the values do not match. GCS operations may only be performed on GCS pages, a data abort is generated if they are not. The combination of hardware enforcement and lack of extra instructions in the function entry and exit paths should result in something which has less overhead and is more difficult to attack than a purely software implementation like clang's shadow stacks. This series implements support for use of GCS by userspace, along with support for use of GCS within KVM guests. It does not enable use of GCS by either EL1 or EL2, this will be implemented separately. Executables are started without GCS and must use a prctl() to enable it, it is expected that this will be done very early in application execution by the dynamic linker or other startup code. For dynamic linking this will be done by checking that everything in the executable is marked as GCS compatible. x86 has an equivalent feature called shadow stacks, this series depends on the x86 patches for generic memory management support for the new guarded/shadow stack page type and shares APIs as much as possible. As there has been extensive discussion with the wider community around the ABI for shadow stacks I have as far as practical kept implementation decisions close to those for x86, anticipating that review would lead to similar conclusions in the absence of strong reasoning for divergence. The main divergence I am concious of is that x86 allows shadow stack to be enabled and disabled repeatedly, freeing the shadow stack for the thread whenever disabled, while this implementation keeps the GCS allocated after disable but refuses to reenable it. This is to avoid races with things actively walking the GCS during a disable, we do anticipate that some systems will wish to disable GCS at runtime but are not aware of any demand for subsequently reenabling it. x86 uses an arch_prctl() to manage enable and disable, since only x86 and S/390 use arch_prctl() a generic prctl() was proposed[1] as part of a patch set for the equivalent RISC-V Zicfiss feature which I initially adopted fairly directly but following review feedback has been revised quite a bit. We currently maintain the x86 pattern of implicitly allocating a shadow stack for threads started with shadow stack enabled, there has been some discussion of removing this support and requiring the use of clone3() with explicit allocation of shadow stacks instead. I have no strong feelings either way, implicit allocation is not really consistent with anything else we do and creates the potential for errors around thread exit but on the other hand it is existing ABI on x86 and minimises the changes needed in userspace code. glibc and bionic changes using this ABI have been implemented and tested. Headless Android systems have been validated and Ross Burton has used this code has been used to bring up a Yocto system with GCS enabed as standard, a test implementation of V8 support has also been done. There is an open issue with support for CRIU, on x86 this required the ability to set the GCS mode via ptrace. This series supports configuring mode bits other than enable/disable via ptrace but it needs to be confirmed if this is sufficient. The series depends on support for shadow stacks in clone3(), that series includes the addition of ARCH_HAS_USER_SHADOW_STACK. https://lore.kernel.org/r/20240731-clone3-shadow-stack-v7-0-a9532eebfb1d@ke… You can see a branch with the full set of dependencies against Linus' tree at: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git arm64-gcs [1] https://lore.kernel.org/lkml/20230213045351.3945824-1-debug@rivosinc.com/ Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v10: - Fix issues with THP. - Tighten up requirements for initialising GCSCR*. - Only generate GCS signal frames for threads using GCS. - Only context switch EL1 GCS registers if S1PIE is enabled. - Move context switch of GCSCRE0_EL1 to EL0 context switch. - Make GCS registers unconditionally visible to userspace. - Use FHU infrastructure. - Don't change writability of ID_AA64PFR1_EL1 for KVM. - Remove unused arguments from alloc_gcs(). - Typo fixes. - Link to v9: https://lore.kernel.org/r/20240625-arm64-gcs-v9-0-0f634469b8f0@kernel.org Changes in v9: - Rebase onto v6.10-rc3. - Restructure and clarify memory management fault handling. - Fix up basic-gcs for the latest clone3() changes. - Convert to newly merged KVM ID register based feature configuration. - Fixes for NV traps. - Link to v8: https://lore.kernel.org/r/20240203-arm64-gcs-v8-0-c9fec77673ef@kernel.org Changes in v8: - Invalidate signal cap token on stack when consuming. - Typo and other trivial fixes. - Don't try to use process_vm_write() on GCS, it intentionally does not work. - Fix leak of thread GCSs. - Rebase onto latest clone3() series. - Link to v7: https://lore.kernel.org/r/20231122-arm64-gcs-v7-0-201c483bd775@kernel.org Changes in v7: - Rebase onto v6.7-rc2 via the clone3() patch series. - Change the token used to cap the stack during signal handling to be compatible with GCSPOPM. - Fix flags for new page types. - Fold in support for clone3(). - Replace copy_to_user_gcs() with put_user_gcs(). - Link to v6: https://lore.kernel.org/r/20231009-arm64-gcs-v6-0-78e55deaa4dd@kernel.org Changes in v6: - Rebase onto v6.6-rc3. - Add some more gcsb_dsync() barriers following spec clarifications. - Due to ongoing discussion around clone()/clone3() I've not updated anything there, the behaviour is the same as on previous versions. - Link to v5: https://lore.kernel.org/r/20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org Changes in v5: - Don't map any permissions for user GCSs, we always use EL0 accessors or use a separate mapping of the page. - Reduce the standard size of the GCS to RLIMIT_STACK/2. - Enforce a PAGE_SIZE alignment requirement on map_shadow_stack(). - Clarifications and fixes to documentation. - More tests. - Link to v4: https://lore.kernel.org/r/20230807-arm64-gcs-v4-0-68cfa37f9069@kernel.org Changes in v4: - Implement flags for map_shadow_stack() allowing the cap and end of stack marker to be enabled independently or not at all. - Relax size and alignment requirements for map_shadow_stack(). - Add more blurb explaining the advantages of hardware enforcement. - Link to v3: https://lore.kernel.org/r/20230731-arm64-gcs-v3-0-cddf9f980d98@kernel.org Changes in v3: - Rebase onto v6.5-rc4. - Add a GCS barrier on context switch. - Add a GCS stress test. - Link to v2: https://lore.kernel.org/r/20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org Changes in v2: - Rebase onto v6.5-rc3. - Rework prctl() interface to allow each bit to be locked independently. - map_shadow_stack() now places the cap token based on the size requested by the caller not the actual space allocated. - Mode changes other than enable via ptrace are now supported. - Expand test coverage. - Various smaller fixes and adjustments. - Link to v1: https://lore.kernel.org/r/20230716-arm64-gcs-v1-0-bf567f93bba6@kernel.org --- Mark Brown (40): arm64/mm: Restructure arch_validate_flags() for extensibility prctl: arch-agnostic prctl for shadow stack mman: Add map_shadow_stack() flags arm64: Document boot requirements for Guarded Control Stacks arm64/gcs: Document the ABI for Guarded Control Stacks arm64/sysreg: Add definitions for architected GCS caps arm64/gcs: Add manual encodings of GCS instructions arm64/gcs: Provide put_user_gcs() arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) arm64/mm: Allocate PIE slots for EL0 guarded control stack mm: Define VM_SHADOW_STACK for arm64 when we support GCS arm64/mm: Map pages for guarded control stack KVM: arm64: Manage GCS access and registers for guests arm64/idreg: Add overrride for GCS arm64/hwcap: Add hwcap for GCS arm64/traps: Handle GCS exceptions arm64/mm: Handle GCS data aborts arm64/gcs: Context switch GCS state for EL0 arm64/gcs: Ensure that new threads have a GCS arm64/gcs: Implement shadow stack prctl() interface arm64/mm: Implement map_shadow_stack() arm64/signal: Set up and restore the GCS context for signal handlers arm64/signal: Expose GCS state in signal frames arm64/ptrace: Expose GCS via ptrace and core files arm64: Add Kconfig for Guarded Control Stack (GCS) kselftest/arm64: Verify the GCS hwcap kselftest: Provide shadow stack enable helpers for arm64 selftests/clone3: Enable arm64 shadow stack testing kselftest/arm64: Add GCS as a detected feature in the signal tests kselftest/arm64: Add framework support for GCS to signal handling tests kselftest/arm64: Allow signals tests to specify an expected si_code kselftest/arm64: Always run signals tests with GCS enabled kselftest/arm64: Add very basic GCS test program kselftest/arm64: Add a GCS test program built with the system libc kselftest/arm64: Add test coverage for GCS mode locking kselftest/arm64: Add GCS signal tests kselftest/arm64: Add a GCS stress test kselftest/arm64: Enable GCS for the FP stress tests KVM: selftests: arm64: Add GCS registers to get-reg-list Documentation/admin-guide/kernel-parameters.txt | 3 + Documentation/arch/arm64/booting.rst | 30 + Documentation/arch/arm64/elf_hwcaps.rst | 2 + Documentation/arch/arm64/gcs.rst | 233 +++++++ Documentation/arch/arm64/index.rst | 1 + Documentation/filesystems/proc.rst | 2 +- arch/arm64/Kconfig | 20 + arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/el2_setup.h | 29 + arch/arm64/include/asm/esr.h | 28 +- arch/arm64/include/asm/exception.h | 2 + arch/arm64/include/asm/gcs.h | 107 +++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/kvm_host.h | 8 + arch/arm64/include/asm/mman.h | 23 +- arch/arm64/include/asm/pgtable-prot.h | 14 +- arch/arm64/include/asm/processor.h | 7 + arch/arm64/include/asm/sysreg.h | 20 + arch/arm64/include/asm/uaccess.h | 40 ++ arch/arm64/include/asm/vncr_mapping.h | 2 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/ptrace.h | 8 + arch/arm64/include/uapi/asm/sigcontext.h | 9 + arch/arm64/kernel/cpufeature.c | 12 + arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/entry-common.c | 23 + arch/arm64/kernel/pi/idreg-override.c | 2 + arch/arm64/kernel/process.c | 85 +++ arch/arm64/kernel/ptrace.c | 59 ++ arch/arm64/kernel/signal.c | 240 ++++++- arch/arm64/kernel/traps.c | 11 + arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 49 +- arch/arm64/kvm/sys_regs.c | 12 + arch/arm64/mm/Makefile | 1 + arch/arm64/mm/fault.c | 42 ++ arch/arm64/mm/gcs.c | 324 +++++++++ arch/arm64/mm/mmap.c | 10 +- arch/arm64/tools/cpucaps | 1 + arch/x86/include/uapi/asm/mman.h | 3 - include/linux/mm.h | 16 +- include/uapi/asm-generic/mman.h | 4 + include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 22 + kernel/sys.c | 30 + tools/testing/selftests/arm64/Makefile | 2 +- tools/testing/selftests/arm64/abi/hwcap.c | 19 + tools/testing/selftests/arm64/fp/assembler.h | 15 + tools/testing/selftests/arm64/fp/fpsimd-test.S | 2 + tools/testing/selftests/arm64/fp/sve-test.S | 2 + tools/testing/selftests/arm64/fp/za-test.S | 2 + tools/testing/selftests/arm64/fp/zt-test.S | 2 + tools/testing/selftests/arm64/gcs/.gitignore | 5 + tools/testing/selftests/arm64/gcs/Makefile | 24 + tools/testing/selftests/arm64/gcs/asm-offsets.h | 0 tools/testing/selftests/arm64/gcs/basic-gcs.c | 357 ++++++++++ tools/testing/selftests/arm64/gcs/gcs-locking.c | 200 ++++++ .../selftests/arm64/gcs/gcs-stress-thread.S | 311 +++++++++ tools/testing/selftests/arm64/gcs/gcs-stress.c | 530 +++++++++++++++ tools/testing/selftests/arm64/gcs/gcs-util.h | 100 +++ tools/testing/selftests/arm64/gcs/libc-gcs.c | 736 +++++++++++++++++++++ tools/testing/selftests/arm64/signal/.gitignore | 1 + .../testing/selftests/arm64/signal/test_signals.c | 17 +- .../testing/selftests/arm64/signal/test_signals.h | 6 + .../selftests/arm64/signal/test_signals_utils.c | 32 +- .../selftests/arm64/signal/test_signals_utils.h | 39 ++ .../arm64/signal/testcases/gcs_exception_fault.c | 62 ++ .../selftests/arm64/signal/testcases/gcs_frame.c | 88 +++ .../arm64/signal/testcases/gcs_write_fault.c | 67 ++ .../selftests/arm64/signal/testcases/testcases.c | 7 + .../selftests/arm64/signal/testcases/testcases.h | 1 + tools/testing/selftests/clone3/clone3_selftests.h | 26 + tools/testing/selftests/ksft_shstk.h | 37 ++ tools/testing/selftests/kvm/aarch64/get-reg-list.c | 28 + 73 files changed, 4222 insertions(+), 40 deletions(-) --- base-commit: 2d2c15fd64fcaba525a96e3198e4a4732680a49e change-id: 20230303-arm64-gcs-e311ab0d8729 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year, 3 months

7
120
0 0

[PATCH v8 net-next 0/3] Enhance network interface feature testing

by Abhinav Jain

This small series includes fixes for creation of veth pairs for networkless kernels & adds tests for turning the different network interface features on and off in selftests/net/netdevice.sh script. Tested using vng and compiles for network as well as networkless kernel. Changes in v8: Remove redundant variable initial_state as per feedback in v7. Changes in v7: https://lore.kernel.org/all/20240815105924.1389290-1-jain.abhinav177@gmail.… Create a third patch in the series to do SKIP -> XFAIL replacement. Add logic to incorporate XFAIL on setting IP address for veth pair. Changes in v6: https://lore.kernel.org/all/20240814191517.50466-1-jain.abhinav177@gmail.com Use XFAIL for ethtool operations that are unsupported instead of SKIP. Changes in v5: https://lore.kernel.org/all/20240808122452.25683-1-jain.abhinav177@gmail.com Rectify the syntax for ip add link. Fix the veth_created condition check. Changes in v4: https://lore.kernel.org/all/20240807175717.7775-1-jain.abhinav177@gmail.com Move veth creation/removal to the main shell script. Tested using vng on a networkless kernel and the script works, sample output below the changes. Changes in v3: https://lore.kernel.org/all/20240614113240.41550-1-jain.abhinav177@gmail.com Add a check for netdev, create veth pair for testing. Restore feature to its initial state. Changes in v2: https://lore.kernel.org/all/20240609132124.51683-1-jain.abhinav177@gmail.com Remove tail usage; use read to parse the features from temp file. v1: https://lore.kernel.org/all/20240606212714.27472-1-jain.abhinav177@gmail.com ``` # selftests: net: netdevice.sh # No valid network device found, creating veth pair # PASS: veth0: set interface up # PASS: veth0: set MAC address # XFAIL: veth0: set IP address unsupported for veth* # PASS: veth0: ethtool list features # PASS: veth0: Turned off feature: rx-checksumming # PASS: veth0: Turned on feature: rx-checksumming # PASS: veth0: Restore feature rx-checksumming to initial state on # Actual changes: # tx-checksum-ip-generic: off ... # PASS: veth0: Turned on feature: rx-udp-gro-forwarding # PASS: veth0: Restore feature rx-udp-gro-forwarding to initial state off # Cannot get register dump: Operation not supported # XFAIL: veth0: ethtool dump not supported # PASS: veth0: ethtool stats # PASS: veth0: stop interface ``` Abhinav Jain (3): selftests: net: Create veth pair for testing in networkless kernel selftests: net: Add on/off checks for non-fixed features of interface selftests: net: Use XFAIL for operations not supported by the driver tools/testing/selftests/net/netdevice.sh | 61 ++++++++++++++++++++++-- 1 file changed, 57 insertions(+), 4 deletions(-) -- 2.34.1

1 year, 3 months

3
10
0 0

[PATCH v2] kselftest/arm64: signal: fix/refactor SVE vector length enumeration

by Andre Przywara

Currently a number of SVE/SME related tests have almost identical functions to enumerate all supported vector lengths. However over time the copy&pasted code has diverged, allowing some bugs to creep in: - fake_sigreturn_sme_change_vl reports a failure, not a SKIP if only one vector length is supported (but the SVE version is fine) - fake_sigreturn_sme_change_vl tries to set the SVE vector length, not the SME one (but the other SME tests are fine) - za_no_regs keeps iterating forever if only one vector length is supported (but za_regs is correct) Since those bugs seem to be mostly copy&paste ones, let's consolidate the enumeration loop into one shared function, and just call that from each test. That should fix the above bugs, and prevent similar issues from happening again. Fixes: 4963aeb35a9e ("kselftest/arm64: signal: Add SME signal handling tests") Signed-off-by: Andre Przywara <andre.przywara(a)arm.com> --- Hi, a small update, making the SME VL loop check more generic, and adding a comment about the reason we have that in the first place. Cheers, Andre tools/testing/selftests/arm64/signal/Makefile | 2 +- .../selftests/arm64/signal/sve_helpers.c | 56 +++++++++++++++++++ .../selftests/arm64/signal/sve_helpers.h | 21 +++++++ .../testcases/fake_sigreturn_sme_change_vl.c | 31 +++------- .../testcases/fake_sigreturn_sve_change_vl.c | 30 ++-------- .../arm64/signal/testcases/ssve_regs.c | 36 +++--------- .../arm64/signal/testcases/ssve_za_regs.c | 36 +++--------- .../arm64/signal/testcases/sve_regs.c | 32 +++-------- .../arm64/signal/testcases/za_no_regs.c | 32 +++-------- .../arm64/signal/testcases/za_regs.c | 36 +++--------- 10 files changed, 131 insertions(+), 181 deletions(-) create mode 100644 tools/testing/selftests/arm64/signal/sve_helpers.c create mode 100644 tools/testing/selftests/arm64/signal/sve_helpers.h diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile index 37c8207b99cfc..1381039fb36f9 100644 --- a/tools/testing/selftests/arm64/signal/Makefile +++ b/tools/testing/selftests/arm64/signal/Makefile @@ -23,7 +23,7 @@ $(TEST_GEN_PROGS): $(PROGS) # Common test-unit targets to build common-layout test-cases executables # Needs secondary expansion to properly include the testcase c-file in pre-reqs COMMON_SOURCES := test_signals.c test_signals_utils.c testcases/testcases.c \ - signals.S + signals.S sve_helpers.c COMMON_HEADERS := test_signals.h test_signals_utils.h testcases/testcases.h .SECONDEXPANSION: diff --git a/tools/testing/selftests/arm64/signal/sve_helpers.c b/tools/testing/selftests/arm64/signal/sve_helpers.c new file mode 100644 index 0000000000000..f57265354eaed --- /dev/null +++ b/tools/testing/selftests/arm64/signal/sve_helpers.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2024 ARM Limited + * + * Common helper functions for SVE and SME functionality. + */ + +#include <stdbool.h> +#include <kselftest.h> +#include <asm/sigcontext.h> +#include <sys/prctl.h> + +unsigned int vls[SVE_VQ_MAX]; +unsigned int nvls; + +int sve_fill_vls(bool use_sme, int min_vls) +{ + int vq, vl; + int pr_set_vl = use_sme ? PR_SME_SET_VL : PR_SVE_SET_VL; + int len_mask = use_sme ? PR_SME_VL_LEN_MASK : PR_SVE_VL_LEN_MASK; + + /* + * Enumerate up to SVE_VQ_MAX vector lengths + */ + for (vq = SVE_VQ_MAX; vq > 0; --vq) { + vl = prctl(pr_set_vl, vq * 16); + if (vl == -1) + return KSFT_FAIL; + + vl &= len_mask; + + /* + * Unlike SVE, SME does not require the minimum vector length + * to be implemented, or the VLs to be consecutive, so any call + * to the prctl might return the single implemented VL, which + * might be larger than 16. So to avoid this loop never + * terminating, bail out here when we find a higher VL than + * we asked for. + * See the ARM ARM, DDI 0487K.a, B1.4.2: I_QQRNR and I_NWYBP. + */ + if (vq < sve_vq_from_vl(vl)) + break; + + /* Skip missing VLs */ + vq = sve_vq_from_vl(vl); + + vls[nvls++] = vl; + } + + if (nvls < min_vls) { + fprintf(stderr, "Only %d VL supported\n", nvls); + return KSFT_SKIP; + } + + return KSFT_PASS; +} diff --git a/tools/testing/selftests/arm64/signal/sve_helpers.h b/tools/testing/selftests/arm64/signal/sve_helpers.h new file mode 100644 index 0000000000000..50948ce471cc6 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/sve_helpers.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2024 ARM Limited + * + * Common helper functions for SVE and SME functionality. + */ + +#ifndef __SVE_HELPERS_H__ +#define __SVE_HELPERS_H__ + +#include <stdbool.h> + +#define VLS_USE_SVE false +#define VLS_USE_SME true + +extern unsigned int vls[]; +extern unsigned int nvls; + +int sve_fill_vls(bool use_sme, int min_vls); + +#endif diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c index ebd5815b54bba..bc10585062d57 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c @@ -11,39 +11,22 @@ #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" struct fake_sigframe sf; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 2); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SVE_SET_VL, vq * 16); - if (vl == -1) - return false; + if (!res) + return true; - vl &= PR_SME_VL_LEN_MASK; + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least two VLs */ - if (nvls < 2) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } - - return true; + return false; } static int fake_sigreturn_ssve_change_vl(struct tdescr *td, diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c index e2a452190511f..e1ccf8f85a70c 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c @@ -12,40 +12,22 @@ #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" struct fake_sigframe sf; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sve_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SVE, 2); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SVE_SET_VL, vq * 16); - if (vl == -1) - return false; + if (!res) + return true; - vl &= PR_SVE_VL_LEN_MASK; - - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least two VLs */ - if (nvls < 2) { - fprintf(stderr, "Only %d VL supported\n", nvls); + if (res == KSFT_SKIP) td->result = KSFT_SKIP; - return false; - } - return true; + return false; } static int fake_sigreturn_sve_change_vl(struct tdescr *td, diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c index 3d37daafcff51..6dbe48cf8b09e 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c @@ -6,51 +6,31 @@ * set up as expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 64]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Did we find the lowest supported VL? */ - if (vq < sve_vq_from_vl(vl)) - break; + if (!res) + return true; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_ssve_regs(void) diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c index 9dc5f128bbc0d..5557e116e9736 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c @@ -6,51 +6,31 @@ * signal frames is set up as expected when enabled simultaneously. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Did we find the lowest supported VL? */ - if (vq < sve_vq_from_vl(vl)) - break; + if (!res) + return true; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_regs(void) diff --git a/tools/testing/selftests/arm64/signal/testcases/sve_regs.c b/tools/testing/selftests/arm64/signal/testcases/sve_regs.c index 8b16eabbb7697..8143eb1c58c18 100644 --- a/tools/testing/selftests/arm64/signal/testcases/sve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/sve_regs.c @@ -6,47 +6,31 @@ * expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 64]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sve_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SVE, 1); - /* - * Enumerate up to SVE_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SVE_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SVE_VL_LEN_MASK; - - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); + if (!res) + return true; - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_sve_regs(void) diff --git a/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c index 4d6f94b6178f3..ce26e9c2fa5e3 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c @@ -6,47 +6,31 @@ * expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SME_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); + if (!res) + return true; - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, diff --git a/tools/testing/selftests/arm64/signal/testcases/za_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_regs.c index 174ad66566964..b9e13f27f1f9a 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_regs.c @@ -6,51 +6,31 @@ * expected. */ +#include <kselftest.h> #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" +#include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; -static unsigned int vls[SVE_VQ_MAX]; -unsigned int nvls = 0; static bool sme_get_vls(struct tdescr *td) { - int vq, vl; + int res = sve_fill_vls(VLS_USE_SME, 1); - /* - * Enumerate up to SME_VQ_MAX vector lengths - */ - for (vq = SVE_VQ_MAX; vq > 0; --vq) { - vl = prctl(PR_SME_SET_VL, vq * 16); - if (vl == -1) - return false; - - vl &= PR_SME_VL_LEN_MASK; - - /* Did we find the lowest supported VL? */ - if (vq < sve_vq_from_vl(vl)) - break; + if (!res) + return true; - /* Skip missing VLs */ - vq = sve_vq_from_vl(vl); - - vls[nvls++] = vl; - } - - /* We need at least one VL */ - if (nvls < 1) { - fprintf(stderr, "Only %d VL supported\n", nvls); - return false; - } + if (res == KSFT_SKIP) + td->result = KSFT_SKIP; - return true; + return false; } static void setup_za_regs(void) -- 2.25.1

1 year, 3 months

2
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[PATCH v2 0/5] KVM: s390: selftests: Add regression tests for CPU subfunctions

by Hariharan Mari

This patch series introduces a set of regression tests for various s390x CPU subfunctions in KVM. The tests ensure that the KVM implementation accurately reflects the behavior of actual CPU instructions for these subfunctions. The series adds tests for a total of 15 instructions across five patches, covering a range of operations including sorting, compression, and various cryptographic functions. Each patch follows a consistent testing pattern: 1. Obtain the KVM_S390_VM_CPU_MACHINE_SUBFUNC attribute for the VM. 2. Execute the relevant asm instructions. 3. Compare KVM-reported results with direct instruction execution results. Testing has been performed on s390x hardware with KVM support. All tests pass successfully, verifying the correct implementation of these subfunctions in KVM. --- v2: * Fix facility_bit type from bool to int --- Hariharan Mari (5): KVM: s390: selftests: Add regression tests for SORTL and DFLTCC CPU subfunctions KVM: s390: selftests: Add regression tests for PRNO, KDSA and KMA crypto subfunctions KVM: s390: selftests: Add regression tests for KMCTR, KMF, KMO and PCC crypto subfunctions KVM: s390: selftests: Add regression tests for KMAC, KMC, KM, KIMD and KLMD crypto subfunctions KVM: s390: selftests: Add regression tests for PLO subfunctions tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/s390x/facility.h | 50 +++ .../kvm/s390x/cpumodel_subfuncs_test.c | 343 ++++++++++++++++++ 3 files changed, 394 insertions(+) create mode 100644 tools/testing/selftests/kvm/include/s390x/facility.h create mode 100644 tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c -- 2.45.2

1 year, 3 months

3
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[PATCH v1 0/2] mremap refactor: check src address for vma boundaries first.

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> mremap doesn't allow relocate, expand, shrink across VMA boundaries, refactor the code to check src address range before doing anything on the destination, i.e. destination won't be unmapped, if src address failed the boundaries check. This also allows us to remove can_modify_mm from mremap.c, since the src address must be single VMA, can_modify_vma is used. It is likely this will improve the performance on mremap, previously the code does sealing check using can_modify_mm for the src address range, and the new code removed the loop (used by can_modify_mm). In order to verify this patch doesn't regress on mremap, I added tests in mseal_test, the test patch can be applied before mremap refactor patch or checkin independently. Also this patch doesn't change mseal's existing schematic: if sealing fail, user can expect the src/dst address isn't updated. So this patch can be applied regardless if we decided to go with current out-of-loop approach or in-loop approach currently in discussion. Regarding the perf test report by stress-ng [1] title: 8be7258aad: stress-ng.pagemove.page_remaps_per_sec -4.4% regression The test is using below for testing: stress-ng --timeout 60 --times --verify --metrics --no-rand-seed --pagemove 64 I can't repro this using ChromeOS, the pagemove test shows large value of stddev and stderr, and can't reasonably refect the performance impact. For example: I write a c program [2] to run the above pagemove test 10 times and calculate the stddev, stderr, for 3 commits: 1> before mseal feature is added: Ops/sec: Mean : 3564.40 Std Dev : 2737.35 (76.80% of Mean) Std Err : 865.63 (24.29% of Mean) 2> after mseal feature is added: Ops/sec: Mean : 2703.84 Std Dev : 2085.13 (77.12% of Mean) Std Err : 659.38 (24.39% of Mean) 3> after current patch (mremap refactor) Ops/sec: Mean : 3603.67 Std Dev : 2422.22 (67.22% of Mean) Std Err : 765.97 (21.26% of Mean) The result shows 21%-24% stderr, this means whatever perf improvment/impact there might be won't be measured correctly by this test. This test machine has 32G memory, Intel(R) Celeron(R) 7305, 5 CPU. And I reboot the machine before each test, and take the first 10 runs with run_stress_ng 10 (I will run longer duration to see if test still shows large stdDev,StdErr) [1] https://lore.kernel.org/lkml/202408041602.caa0372-oliver.sang@intel.com/ [2] https://github.com/peaktocreek/mmperf/blob/main/run_stress_ng.c Jeff Xu (2): mseal:selftest mremap across VMA boundaries. mseal: refactor mremap to remove can_modify_mm mm/internal.h | 24 ++ mm/mremap.c | 77 +++---- mm/mseal.c | 17 -- tools/testing/selftests/mm/mseal_test.c | 293 +++++++++++++++++++++++- 4 files changed, 353 insertions(+), 58 deletions(-) -- 2.46.0.76.ge559c4bf1a-goog

1 year, 3 months

5
20
0 0

[PATCH net-next v13 04/14] mm: page_frag: add '_va' suffix to page_frag API

by Yunsheng Lin

Currently the page_frag API is returning 'virtual address' or 'va' when allocing and expecting 'virtual address' or 'va' as input when freeing. As we are about to support new use cases that the caller need to deal with 'struct page' or need to deal with both 'va' and 'struct page'. In order to differentiate the API handling between 'va' and 'struct page', add '_va' suffix to the corresponding API mirroring the page_pool_alloc_va() API of the page_pool. So that callers expecting to deal with va, page or both va and page may call page_frag_alloc_va*, page_frag_alloc_pg*, or page_frag_alloc* API accordingly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Subbaraya Sundeep <sbhatta(a)marvell.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> Acked-by: Sagi Grimberg <sagi(a)grimberg.me> --- drivers/net/ethernet/google/gve/gve_rx.c | 4 ++-- drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +- drivers/net/ethernet/intel/ice/ice_txrx.h | 2 +- drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 2 +- .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 ++-- .../marvell/octeontx2/nic/otx2_common.c | 2 +- drivers/net/ethernet/mediatek/mtk_wed_wo.c | 4 ++-- drivers/nvme/host/tcp.c | 8 +++---- drivers/nvme/target/tcp.c | 22 +++++++++---------- drivers/vhost/net.c | 6 ++--- include/linux/page_frag_cache.h | 21 +++++++++--------- include/linux/skbuff.h | 2 +- kernel/bpf/cpumap.c | 2 +- mm/page_frag_cache.c | 12 +++++----- net/core/skbuff.c | 16 +++++++------- net/core/xdp.c | 2 +- net/rxrpc/txbuf.c | 15 +++++++------ net/sunrpc/svcsock.c | 6 ++--- .../selftests/mm/page_frag/page_frag_test.c | 13 ++++++----- 19 files changed, 75 insertions(+), 70 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c index acb73d4d0de6..b6c10100e462 100644 --- a/drivers/net/ethernet/google/gve/gve_rx.c +++ b/drivers/net/ethernet/google/gve/gve_rx.c @@ -729,7 +729,7 @@ static int gve_xdp_redirect(struct net_device *dev, struct gve_rx_ring *rx, total_len = headroom + SKB_DATA_ALIGN(len) + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); - frame = page_frag_alloc(&rx->page_cache, total_len, GFP_ATOMIC); + frame = page_frag_alloc_va(&rx->page_cache, total_len, GFP_ATOMIC); if (!frame) { u64_stats_update_begin(&rx->statss); rx->xdp_alloc_fails++; @@ -742,7 +742,7 @@ static int gve_xdp_redirect(struct net_device *dev, struct gve_rx_ring *rx, err = xdp_do_redirect(dev, &new, xdp_prog); if (err) - page_frag_free(frame); + page_frag_free_va(frame); return err; } diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index 8d25b6981269..00c706de2b82 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -126,7 +126,7 @@ ice_unmap_and_free_tx_buf(struct ice_tx_ring *ring, struct ice_tx_buf *tx_buf) dev_kfree_skb_any(tx_buf->skb); break; case ICE_TX_BUF_XDP_TX: - page_frag_free(tx_buf->raw_buf); + page_frag_free_va(tx_buf->raw_buf); break; case ICE_TX_BUF_XDP_XMIT: xdp_return_frame(tx_buf->xdpf); diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h index feba314a3fe4..6379f57d8228 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.h +++ b/drivers/net/ethernet/intel/ice/ice_txrx.h @@ -148,7 +148,7 @@ static inline int ice_skb_pad(void) * @ICE_TX_BUF_DUMMY: dummy Flow Director packet, unmap and kfree() * @ICE_TX_BUF_FRAG: mapped skb OR &xdp_buff frag, only unmap DMA * @ICE_TX_BUF_SKB: &sk_buff, unmap and consume_skb(), update stats - * @ICE_TX_BUF_XDP_TX: &xdp_buff, unmap and page_frag_free(), stats + * @ICE_TX_BUF_XDP_TX: &xdp_buff, unmap and page_frag_free_va(), stats * @ICE_TX_BUF_XDP_XMIT: &xdp_frame, unmap and xdp_return_frame(), stats * @ICE_TX_BUF_XSK_TX: &xdp_buff on XSk queue, xsk_buff_free(), stats */ diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c index 2719f0e20933..a1a41a14df0d 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c @@ -250,7 +250,7 @@ ice_clean_xdp_tx_buf(struct device *dev, struct ice_tx_buf *tx_buf, switch (tx_buf->type) { case ICE_TX_BUF_XDP_TX: - page_frag_free(tx_buf->raw_buf); + page_frag_free_va(tx_buf->raw_buf); break; case ICE_TX_BUF_XDP_XMIT: xdp_return_frame_bulk(tx_buf->xdpf, bq); diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 149911e3002a..eef16a909f85 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -302,7 +302,7 @@ static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector, /* free the skb */ if (ring_is_xdp(tx_ring)) - page_frag_free(tx_buffer->data); + page_frag_free_va(tx_buffer->data); else napi_consume_skb(tx_buffer->skb, napi_budget); @@ -2412,7 +2412,7 @@ static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring) /* Free all the Tx ring sk_buffs */ if (ring_is_xdp(tx_ring)) - page_frag_free(tx_buffer->data); + page_frag_free_va(tx_buffer->data); else dev_kfree_skb_any(tx_buffer->skb); diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c index 87d5776e3b88..a485e988fa1d 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c @@ -553,7 +553,7 @@ static int __otx2_alloc_rbuf(struct otx2_nic *pfvf, struct otx2_pool *pool, *dma = dma_map_single_attrs(pfvf->dev, buf, pool->rbsize, DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); if (unlikely(dma_mapping_error(pfvf->dev, *dma))) { - page_frag_free(buf); + page_frag_free_va(buf); return -ENOMEM; } diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.c b/drivers/net/ethernet/mediatek/mtk_wed_wo.c index 7063c78bd35f..c4228719f8a4 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed_wo.c +++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.c @@ -142,8 +142,8 @@ mtk_wed_wo_queue_refill(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q, dma_addr_t addr; void *buf; - buf = page_frag_alloc(&q->cache, q->buf_size, - GFP_ATOMIC | GFP_DMA32); + buf = page_frag_alloc_va(&q->cache, q->buf_size, + GFP_ATOMIC | GFP_DMA32); if (!buf) break; diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index a2a47d3ab99f..86906bc505de 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -506,7 +506,7 @@ static void nvme_tcp_exit_request(struct blk_mq_tag_set *set, { struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); - page_frag_free(req->pdu); + page_frag_free_va(req->pdu); } static int nvme_tcp_init_request(struct blk_mq_tag_set *set, @@ -520,7 +520,7 @@ static int nvme_tcp_init_request(struct blk_mq_tag_set *set, struct nvme_tcp_queue *queue = &ctrl->queues[queue_idx]; u8 hdgst = nvme_tcp_hdgst_len(queue); - req->pdu = page_frag_alloc(&queue->pf_cache, + req->pdu = page_frag_alloc_va(&queue->pf_cache, sizeof(struct nvme_tcp_cmd_pdu) + hdgst, GFP_KERNEL | __GFP_ZERO); if (!req->pdu) @@ -1337,7 +1337,7 @@ static void nvme_tcp_free_async_req(struct nvme_tcp_ctrl *ctrl) { struct nvme_tcp_request *async = &ctrl->async_req; - page_frag_free(async->pdu); + page_frag_free_va(async->pdu); } static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl) @@ -1346,7 +1346,7 @@ static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl) struct nvme_tcp_request *async = &ctrl->async_req; u8 hdgst = nvme_tcp_hdgst_len(queue); - async->pdu = page_frag_alloc(&queue->pf_cache, + async->pdu = page_frag_alloc_va(&queue->pf_cache, sizeof(struct nvme_tcp_cmd_pdu) + hdgst, GFP_KERNEL | __GFP_ZERO); if (!async->pdu) diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 5bff0d5464d1..560df3db2f82 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1463,24 +1463,24 @@ static int nvmet_tcp_alloc_cmd(struct nvmet_tcp_queue *queue, c->queue = queue; c->req.port = queue->port->nport; - c->cmd_pdu = page_frag_alloc(&queue->pf_cache, + c->cmd_pdu = page_frag_alloc_va(&queue->pf_cache, sizeof(*c->cmd_pdu) + hdgst, GFP_KERNEL | __GFP_ZERO); if (!c->cmd_pdu) return -ENOMEM; c->req.cmd = &c->cmd_pdu->cmd; - c->rsp_pdu = page_frag_alloc(&queue->pf_cache, + c->rsp_pdu = page_frag_alloc_va(&queue->pf_cache, sizeof(*c->rsp_pdu) + hdgst, GFP_KERNEL | __GFP_ZERO); if (!c->rsp_pdu) goto out_free_cmd; c->req.cqe = &c->rsp_pdu->cqe; - c->data_pdu = page_frag_alloc(&queue->pf_cache, + c->data_pdu = page_frag_alloc_va(&queue->pf_cache, sizeof(*c->data_pdu) + hdgst, GFP_KERNEL | __GFP_ZERO); if (!c->data_pdu) goto out_free_rsp; - c->r2t_pdu = page_frag_alloc(&queue->pf_cache, + c->r2t_pdu = page_frag_alloc_va(&queue->pf_cache, sizeof(*c->r2t_pdu) + hdgst, GFP_KERNEL | __GFP_ZERO); if (!c->r2t_pdu) goto out_free_data; @@ -1495,20 +1495,20 @@ static int nvmet_tcp_alloc_cmd(struct nvmet_tcp_queue *queue, return 0; out_free_data: - page_frag_free(c->data_pdu); + page_frag_free_va(c->data_pdu); out_free_rsp: - page_frag_free(c->rsp_pdu); + page_frag_free_va(c->rsp_pdu); out_free_cmd: - page_frag_free(c->cmd_pdu); + page_frag_free_va(c->cmd_pdu); return -ENOMEM; } static void nvmet_tcp_free_cmd(struct nvmet_tcp_cmd *c) { - page_frag_free(c->r2t_pdu); - page_frag_free(c->data_pdu); - page_frag_free(c->rsp_pdu); - page_frag_free(c->cmd_pdu); + page_frag_free_va(c->r2t_pdu); + page_frag_free_va(c->data_pdu); + page_frag_free_va(c->rsp_pdu); + page_frag_free_va(c->cmd_pdu); } static int nvmet_tcp_alloc_cmds(struct nvmet_tcp_queue *queue) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..6691fac01e0d 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -686,8 +686,8 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq, return -ENOSPC; buflen += SKB_DATA_ALIGN(len + pad); - buf = page_frag_alloc_align(&net->pf_cache, buflen, GFP_KERNEL, - SMP_CACHE_BYTES); + buf = page_frag_alloc_va_align(&net->pf_cache, buflen, GFP_KERNEL, + SMP_CACHE_BYTES); if (unlikely(!buf)) return -ENOMEM; @@ -734,7 +734,7 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq, return 0; err: - page_frag_free(buf); + page_frag_free_va(buf); return ret; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index a758cb65a9b3..ef038a07925c 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -9,23 +9,24 @@ void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); +void *__page_frag_alloc_va_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask); -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) +static inline void *page_frag_alloc_va_align(struct page_frag_cache *nc, + unsigned int fragsz, + gfp_t gfp_mask, unsigned int align) { WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); + return __page_frag_alloc_va_align(nc, fragsz, gfp_mask, -align); } -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) +static inline void *page_frag_alloc_va(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) { - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); + return __page_frag_alloc_va_align(nc, fragsz, gfp_mask, ~0u); } -void page_frag_free(void *addr); +void page_frag_free_va(void *addr); #endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 7482997c719f..f9f0393e6b12 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3381,7 +3381,7 @@ static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev, static inline void skb_free_frag(void *addr) { - page_frag_free(addr); + page_frag_free_va(addr); } void *__napi_alloc_frag_align(unsigned int fragsz, unsigned int align_mask); diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c index fbdf5a1aabfe..3b70b6b071b9 100644 --- a/kernel/bpf/cpumap.c +++ b/kernel/bpf/cpumap.c @@ -323,7 +323,7 @@ static int cpu_map_kthread_run(void *data) /* Bring struct page memory area to curr CPU. Read by * build_skb_around via page_is_pfmemalloc(), and when - * freed written by page_frag_free call. + * freed written by page_frag_free_va call. */ prefetchw(page); } diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c index c5bc72cf018a..70fb6dead624 100644 --- a/mm/page_frag_cache.c +++ b/mm/page_frag_cache.c @@ -59,9 +59,9 @@ void __page_frag_cache_drain(struct page *page, unsigned int count) } EXPORT_SYMBOL(__page_frag_cache_drain); -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) +void *__page_frag_alloc_va_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) { #if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) unsigned int size = nc->size; @@ -130,16 +130,16 @@ void *__page_frag_alloc_align(struct page_frag_cache *nc, return nc->va + (size - remaining); } -EXPORT_SYMBOL(__page_frag_alloc_align); +EXPORT_SYMBOL(__page_frag_alloc_va_align); /* * Frees a page fragment allocated out of either a compound or order 0 page. */ -void page_frag_free(void *addr) +void page_frag_free_va(void *addr) { struct page *page = virt_to_head_page(addr); if (unlikely(put_page_testzero(page))) free_unref_page(page, compound_order(page)); } -EXPORT_SYMBOL(page_frag_free); +EXPORT_SYMBOL(page_frag_free_va); diff --git a/net/core/skbuff.c b/net/core/skbuff.c index de2a044cc665..6cf2c51a34e1 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -314,8 +314,8 @@ void *__napi_alloc_frag_align(unsigned int fragsz, unsigned int align_mask) fragsz = SKB_DATA_ALIGN(fragsz); local_lock_nested_bh(&napi_alloc_cache.bh_lock); - data = __page_frag_alloc_align(&nc->page, fragsz, - GFP_ATOMIC | __GFP_NOWARN, align_mask); + data = __page_frag_alloc_va_align(&nc->page, fragsz, + GFP_ATOMIC | __GFP_NOWARN, align_mask); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); return data; @@ -330,9 +330,9 @@ void *__netdev_alloc_frag_align(unsigned int fragsz, unsigned int align_mask) struct page_frag_cache *nc = this_cpu_ptr(&netdev_alloc_cache); fragsz = SKB_DATA_ALIGN(fragsz); - data = __page_frag_alloc_align(nc, fragsz, - GFP_ATOMIC | __GFP_NOWARN, - align_mask); + data = __page_frag_alloc_va_align(nc, fragsz, + GFP_ATOMIC | __GFP_NOWARN, + align_mask); } else { local_bh_disable(); data = __napi_alloc_frag_align(fragsz, align_mask); @@ -751,14 +751,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); - data = page_frag_alloc(nc, len, gfp_mask); + data = page_frag_alloc_va(nc, len, gfp_mask); pfmemalloc = nc->pfmemalloc; } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); - data = page_frag_alloc(nc, len, gfp_mask); + data = page_frag_alloc_va(nc, len, gfp_mask); pfmemalloc = nc->pfmemalloc; local_unlock_nested_bh(&napi_alloc_cache.bh_lock); @@ -848,7 +848,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) } else { len = SKB_HEAD_ALIGN(len); - data = page_frag_alloc(&nc->page, len, gfp_mask); + data = page_frag_alloc_va(&nc->page, len, gfp_mask); pfmemalloc = nc->page.pfmemalloc; } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/core/xdp.c b/net/core/xdp.c index bcc5551c6424..7d4e09fb478f 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -387,7 +387,7 @@ void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct, page_pool_put_full_page(page->pp, page, napi_direct); break; case MEM_TYPE_PAGE_SHARED: - page_frag_free(data); + page_frag_free_va(data); break; case MEM_TYPE_PAGE_ORDER0: page = virt_to_page(data); /* Assumes order0 page*/ diff --git a/net/rxrpc/txbuf.c b/net/rxrpc/txbuf.c index c3913d8a50d3..dccb0353ee84 100644 --- a/net/rxrpc/txbuf.c +++ b/net/rxrpc/txbuf.c @@ -33,8 +33,8 @@ struct rxrpc_txbuf *rxrpc_alloc_data_txbuf(struct rxrpc_call *call, size_t data_ data_align = umax(data_align, L1_CACHE_BYTES); mutex_lock(&call->conn->tx_data_alloc_lock); - buf = page_frag_alloc_align(&call->conn->tx_data_alloc, total, gfp, - data_align); + buf = page_frag_alloc_va_align(&call->conn->tx_data_alloc, total, gfp, + data_align); mutex_unlock(&call->conn->tx_data_alloc_lock); if (!buf) { kfree(txb); @@ -96,17 +96,18 @@ struct rxrpc_txbuf *rxrpc_alloc_ack_txbuf(struct rxrpc_call *call, size_t sack_s if (!txb) return NULL; - buf = page_frag_alloc(&call->local->tx_alloc, - sizeof(*whdr) + sizeof(*ack) + 1 + 3 + sizeof(*trailer), gfp); + buf = page_frag_alloc_va(&call->local->tx_alloc, + sizeof(*whdr) + sizeof(*ack) + 1 + 3 + sizeof(*trailer), gfp); if (!buf) { kfree(txb); return NULL; } if (sack_size) { - buf2 = page_frag_alloc(&call->local->tx_alloc, sack_size, gfp); + buf2 = page_frag_alloc_va(&call->local->tx_alloc, sack_size, + gfp); if (!buf2) { - page_frag_free(buf); + page_frag_free_va(buf); kfree(txb); return NULL; } @@ -180,7 +181,7 @@ static void rxrpc_free_txbuf(struct rxrpc_txbuf *txb) rxrpc_txbuf_free); for (i = 0; i < txb->nr_kvec; i++) if (txb->kvec[i].iov_base) - page_frag_free(txb->kvec[i].iov_base); + page_frag_free_va(txb->kvec[i].iov_base); kfree(txb); atomic_dec(&rxrpc_nr_txbuf); } diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 6b3f01beb294..42d20412c1c3 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1222,8 +1222,8 @@ static int svc_tcp_sendmsg(struct svc_sock *svsk, struct svc_rqst *rqstp, /* The stream record marker is copied into a temporary page * fragment buffer so that it can be included in rq_bvec. */ - buf = page_frag_alloc(&svsk->sk_frag_cache, sizeof(marker), - GFP_KERNEL); + buf = page_frag_alloc_va(&svsk->sk_frag_cache, sizeof(marker), + GFP_KERNEL); if (!buf) return -ENOMEM; memcpy(buf, &marker, sizeof(marker)); @@ -1235,7 +1235,7 @@ static int svc_tcp_sendmsg(struct svc_sock *svsk, struct svc_rqst *rqstp, iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, rqstp->rq_bvec, 1 + count, sizeof(marker) + rqstp->rq_res.len); ret = sock_sendmsg(svsk->sk_sock, &msg); - page_frag_free(buf); + page_frag_free_va(buf); if (ret < 0) return ret; *sentp += ret; diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 4a009122991e..e522611452c9 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -52,7 +52,7 @@ static int page_frag_pop_thread(void *arg) if (obj) { nr--; - page_frag_free(obj); + page_frag_free_va(obj); } else { cond_resched(); } @@ -80,13 +80,16 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_frag, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + va = page_frag_alloc_va_align(&test_frag, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); WARN_ONCE((unsigned long)va & (SMP_CACHE_BYTES - 1), "unaligned va returned\n"); } else { - va = page_frag_alloc(&test_frag, test_alloc_len, GFP_KERNEL); + va = page_frag_alloc_va(&test_frag, test_alloc_len, + GFP_KERNEL); } if (!va) @@ -94,7 +97,7 @@ static int page_frag_push_thread(void *arg) ret = __ptr_ring_produce(ring, va); if (ret) { - page_frag_free(va); + page_frag_free_va(va); cond_resched(); } else { nr--; -- 2.33.0

1 year, 3 months

3
8
0 0

[PATCH net-next v5] net: netconsole: selftests: Create a new netconsole selftest

by Breno Leitao

Adds a selftest that creates two virtual interfaces, assigns one to a new namespace, and assigns IP addresses to both. It listens on the destination interface using socat and configures a dynamic target on netconsole, pointing to the destination IP address. The test then checks if the message was received properly on the destination interface. Signed-off-by: Breno Leitao <leitao(a)debian.org> Acked-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changelog: v5: * Replace check_file_size() by "test -s" (Matthieu) v4: * Avoid sleeping in waiting for sockets and files (Matthieu Baerts) * Some other improvements (Matthieu Baerts) * Add configfs as a dependency (Jakub) * https://lore.kernel.org/all/20240816132450.346744-1-leitao@debian.org/ v3: * Defined CONFIGs in config file (Jakub) * Identention fixes (Petr Machata) * Use setup_ns in a better way (Matthieu Baerts) * Add dependencies in TEST_INCLUDES (Hangbin Liu) * https://lore.kernel.org/all/20240815095157.3064722-1-leitao@debian.org/ v2: * Change the location of the path (Jakub) * Move from veth to netdevsim * Other small changes in dependency checks and cleanup * https://lore.kernel.org/all/20240813183825.837091-1-leitao@debian.org/ v1: * https://lore.kernel.org/all/ZqyUHN770pjSofTC@gmail.com/ MAINTAINERS | 1 + tools/testing/selftests/drivers/net/Makefile | 5 +- tools/testing/selftests/drivers/net/config | 4 + .../selftests/drivers/net/netcons_basic.sh | 225 ++++++++++++++++++ 4 files changed, 234 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/drivers/net/netcons_basic.sh diff --git a/MAINTAINERS b/MAINTAINERS index 5dbf23cf11c8..9a371ddd8719 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15772,6 +15772,7 @@ M: Breno Leitao <leitao(a)debian.org> S: Maintained F: Documentation/networking/netconsole.rst F: drivers/net/netconsole.c +F: tools/testing/selftests/drivers/net/netcons_basic.sh NETDEVSIM M: Jakub Kicinski <kuba(a)kernel.org> diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index e54f382bcb02..39fb97a8c1df 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -1,8 +1,11 @@ # SPDX-License-Identifier: GPL-2.0 -TEST_INCLUDES := $(wildcard lib/py/*.py) +TEST_INCLUDES := $(wildcard lib/py/*.py) \ + ../../net/net_helper.sh \ + ../../net/lib.sh \ TEST_PROGS := \ + netcons_basic.sh \ ping.py \ queues.py \ stats.py \ diff --git a/tools/testing/selftests/drivers/net/config b/tools/testing/selftests/drivers/net/config index f6a58ce8a230..a2d8af60876d 100644 --- a/tools/testing/selftests/drivers/net/config +++ b/tools/testing/selftests/drivers/net/config @@ -1,2 +1,6 @@ CONFIG_IPV6=y CONFIG_NETDEVSIM=m +CONFIG_CONFIGFS_FS=y +CONFIG_NETCONSOLE=m +CONFIG_NETCONSOLE_DYNAMIC=y +CONFIG_NETCONSOLE_EXTENDED_LOG=y diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh new file mode 100755 index 000000000000..137875505663 --- /dev/null +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -0,0 +1,225 @@ +#!/usr/bin/env bash +# SPDX-License-Identifier: GPL-2.0 + +# This test creates two netdevsim virtual interfaces, assigns one of them (the +# "destination interface") to a new namespace, and assigns IP addresses to both +# interfaces. +# +# It listens on the destination interface using socat and configures a dynamic +# target on netconsole, pointing to the destination IP address. +# +# Finally, it checks whether the message was received properly on the +# destination interface. Note that this test may pollute the kernel log buffer +# (dmesg) and relies on dynamic configuration and namespaces being configured. +# +# Author: Breno Leitao <leitao(a)debian.org> + +set -euo pipefail + +SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") + +# Simple script to test dynamic targets in netconsole +SRCIF="" # to be populated later +SRCIP=192.168.1.1 +DSTIF="" # to be populated later +DSTIP=192.168.1.2 + +PORT="6666" +MSG="netconsole selftest" +TARGET=$(mktemp -u netcons_XXXXX) +NETCONS_CONFIGFS="/sys/kernel/config/netconsole" +NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}" +# NAMESPACE will be populated by setup_ns with a random value +NAMESPACE="" + +# IDs for netdevsim +NSIM_DEV_1_ID=$((256 + RANDOM % 256)) +NSIM_DEV_2_ID=$((512 + RANDOM % 256)) + +# Used to create and delete namespaces +source "${SCRIPTDIR}"/../../net/lib.sh +source "${SCRIPTDIR}"/../../net/net_helper.sh + +# Create netdevsim interfaces +create_ifaces() { + local NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device + + echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_NEW" + echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_NEW" + udevadm settle 2> /dev/null || true + + local NSIM1=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_1_ID" + local NSIM2=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_2_ID" + + # These are global variables + SRCIF=$(find "$NSIM1"/net -maxdepth 1 -type d ! \ + -path "$NSIM1"/net -exec basename {} \;) + DSTIF=$(find "$NSIM2"/net -maxdepth 1 -type d ! \ + -path "$NSIM2"/net -exec basename {} \;) +} + +link_ifaces() { + local NSIM_DEV_SYS_LINK="/sys/bus/netdevsim/link_device" + local SRCIF_IFIDX=$(cat /sys/class/net/"$SRCIF"/ifindex) + local DSTIF_IFIDX=$(cat /sys/class/net/"$DSTIF"/ifindex) + + exec {NAMESPACE_FD}</var/run/netns/"${NAMESPACE}" + exec {INITNS_FD}</proc/self/ns/net + + # Bind the dst interface to namespace + ip link set "${DSTIF}" netns "${NAMESPACE}" + + # Linking one device to the other one (on the other namespace} + if ! echo "${INITNS_FD}:$SRCIF_IFIDX $NAMESPACE_FD:$DSTIF_IFIDX" > $NSIM_DEV_SYS_LINK + then + echo "linking netdevsim1 with netdevsim2 should succeed" + cleanup + exit "${ksft_skip}" + fi +} + +function configure_ip() { + # Configure the IPs for both interfaces + ip netns exec "${NAMESPACE}" ip addr add "${DSTIP}"/24 dev "${DSTIF}" + ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" up + + ip addr add "${SRCIP}"/24 dev "${SRCIF}" + ip link set "${SRCIF}" up +} + +function set_network() { + # setup_ns function is coming from lib.sh + setup_ns NAMESPACE + + # Create both interfaces, and assign the destination to a different + # namespace + create_ifaces + + # Link both interfaces back to back + link_ifaces + + configure_ip +} + +function create_dynamic_target() { + DSTMAC=$(ip netns exec "${NAMESPACE}" \ + ip link show "${DSTIF}" | awk '/ether/ {print $2}') + + # Create a dynamic target + mkdir "${NETCONS_PATH}" + + echo "${DSTIP}" > "${NETCONS_PATH}"/remote_ip + echo "${SRCIP}" > "${NETCONS_PATH}"/local_ip + echo "${DSTMAC}" > "${NETCONS_PATH}"/remote_mac + echo "${SRCIF}" > "${NETCONS_PATH}"/dev_name + + echo 1 > "${NETCONS_PATH}"/enabled +} + +function cleanup() { + local NSIM_DEV_SYS_DEL="/sys/bus/netdevsim/del_device" + + # delete netconsole dynamic reconfiguration + echo 0 > "${NETCONS_PATH}"/enabled + # Remove the configfs entry + rmdir "${NETCONS_PATH}" + + # Delete netdevsim devices + echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_DEL" + echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_DEL" + + # this is coming from lib.sh + cleanup_all_ns +} + +function listen_port_and_save_to() { + local OUTPUT=${1} + # Just wait for 2 seconds + timeout 2 ip netns exec "${NAMESPACE}" \ + socat UDP-LISTEN:"${PORT}",fork "${OUTPUT}" +} + +function validate_result() { + local TMPFILENAME="$1" + + # Check if the file exists + if [ ! -f "$TMPFILENAME" ]; then + echo "FAIL: File was not generated." >&2 + exit "${ksft_fail}" + fi + + if ! grep -q "${MSG}" "${TMPFILENAME}"; then + echo "FAIL: ${MSG} not found in ${TMPFILENAME}" >&2 + cat "${TMPFILENAME}" >&2 + exit "${ksft_fail}" + fi + + # Delete the file once it is validated, otherwise keep it + # for debugging purposes + rm "${TMPFILENAME}" + exit "${ksft_pass}" +} + +function check_for_dependencies() { + if [ "$(id -u)" -ne 0 ]; then + echo "This test must be run as root" >&2 + exit "${ksft_skip}" + fi + + if ! which socat > /dev/null ; then + echo "SKIP: socat(1) is not available" >&2 + exit "${ksft_skip}" + fi + + if ! which ip > /dev/null ; then + echo "SKIP: ip(1) is not available" >&2 + exit "${ksft_skip}" + fi + + if ! which udevadm > /dev/null ; then + echo "SKIP: udevadm(1) is not available" >&2 + exit "${ksft_skip}" + fi + + if [ ! -d "${NETCONS_CONFIGFS}" ]; then + echo "SKIP: directory ${NETCONS_CONFIGFS} does not exist. Check if NETCONSOLE_DYNAMIC is enabled" >&2 + exit "${ksft_skip}" + fi + + if ip link show "${DSTIF}" 2> /dev/null; then + echo "SKIP: interface ${DSTIF} exists in the system. Not overwriting it." >&2 + exit "${ksft_skip}" + fi +} + +# ========== # +# Start here # +# ========== # +modprobe netdevsim 2> /dev/null || true +modprobe netconsole 2 > /dev/null || true + +# The content of kmsg will be save to the following file +OUTPUT_FILE="/tmp/${TARGET}" + +# Check for basic system dependency and exit if not found +check_for_dependencies +# Set current loglevel to KERN_INFO(6), and default to KERN_NOTICE(5) +echo "6 5" > /proc/sys/kernel/printk +# Remove the namespace, interfaces and netconsole target on exit +trap cleanup EXIT +# Create one namespace and two interfaces +set_network +# Create a dynamic target for netconsole +create_dynamic_target +# Listed for netconsole port inside the namespace and destination interface +listen_port_and_save_to "${OUTPUT_FILE}" & +# Wait for socat to start and listen to the port. +wait_local_port_listen "${NAMESPACE}" "${PORT}" udp +# Send the message +echo "${MSG}: ${TARGET}" > /dev/kmsg +# Wait until socat saves the file to disk +busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" + +# Make sure the message was received in the dst part +# and exit +validate_result "${OUTPUT_FILE}" -- 2.43.5

1 year, 3 months

3
3
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kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (v6.11-rc1-15-gc049acee3c71c)

by kernelci.org bot

kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (v6.11-rc1-15-gc049acee3c71c) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.11-rc1-15-gc049a… Tree: kselftest Branch: next Git Describe: v6.11-rc1-15-gc049acee3c71c Git Commit: c049acee3c71cfc26c739f82617a84e13e471a45 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x39: relocation to !ENDBR: .text+0x14ef94 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x39: relocation to !ENDBR: .text+0x14ef94 --- For more info write to <info(a)kernelci.org>

1 year, 3 months

1
0
0 0

[PATCH] selftests/ftrace: Fix test to handle both old and new kernels

by Steven Rostedt

From: "Steven Rostedt (Google)" <rostedt(a)goodmis.org> The function "scheduler_tick" was renamed to "sched_tick" and a selftest that used that function for testing function trace filtering used that function as part of the test. But the change causes it to fail when run on older kernels. As tests should not fail on older kernels, add a check to see which name is available before testing. Fixes: 86dd6c04ef9f2 ("sched/balancing: Rename scheduler_tick() => sched_tick()") Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- .../ftrace/test.d/ftrace/func_set_ftrace_file.tc | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc index 073a748b9380..263f6b798c85 100644 --- a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc @@ -19,7 +19,14 @@ fail() { # mesg FILTER=set_ftrace_filter FUNC1="schedule" -FUNC2="sched_tick" +if grep '^sched_tick\b' available_filter_functions; then + FUNC2="sched_tick" +elif grep '^scheduler_tick\b' available_filter_functions; then + FUNC2="scheduler_tick" +else + exit_unresolved +fi + ALL_FUNCS="#### all functions enabled ####" -- 2.43.0

1 year, 3 months

2
3
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[PATCH net-next v2] selftests: net: add helper for checking if nettest is available

by Jakub Kicinski

A few tests check if nettest exists in the $PATH before adding $PWD to $PATH and re-checking. They don't discard stderr on the first check (and nettest is built as part of selftests, so it's pretty normal for it to not be available in system $PATH). This leads to output noise: which: no nettest in (/home/virtme/tools/fs/bin:/home/virtme/tools/fs/sbin:/home/virtme/tools/fs/usr/bin:/home/virtme/tools/fs/usr/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin) Add a common helper for the check which does silence stderr. There is another small functional change hiding here, because pmtu.sh and fib_rule_tests.sh used to return from the test case rather than completely exit. Building nettest is not hard, there should be no need to maintain the ability to selectively skip cases in its absence. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- v2: - fold in the changes from Ido v1: https://lore.kernel.org/20240817183848.658443-1-kuba@kernel.org CC: shuah(a)kernel.org CC: linux-kselftest(a)vger.kernel.org CC: Ido Schimmel <idosch(a)idosch.org> --- tools/testing/selftests/net/fcnal-test.sh | 9 +---- tools/testing/selftests/net/fib_rule_tests.sh | 37 +------------------ tools/testing/selftests/net/lib.sh | 15 ++++++++ tools/testing/selftests/net/pmtu.sh | 8 +--- tools/testing/selftests/net/settings | 1 + .../selftests/net/unicast_extensions.sh | 9 +---- .../selftests/net/vrf_route_leaking.sh | 3 +- 7 files changed, 23 insertions(+), 59 deletions(-) diff --git a/tools/testing/selftests/net/fcnal-test.sh b/tools/testing/selftests/net/fcnal-test.sh index 386ebd829df5..899dbad0104b 100755 --- a/tools/testing/selftests/net/fcnal-test.sh +++ b/tools/testing/selftests/net/fcnal-test.sh @@ -4304,14 +4304,7 @@ elif [ "$TESTS" = "ipv6" ]; then TESTS="$TESTS_IPV6" fi -# nettest can be run from PATH or from same directory as this selftest -if ! which nettest >/dev/null; then - PATH=$PWD:$PATH - if ! which nettest >/dev/null; then - echo "'nettest' command not found; skipping tests" - exit $ksft_skip - fi -fi +check_gen_prog "nettest" declare -i nfail=0 declare -i nsuccess=0 diff --git a/tools/testing/selftests/net/fib_rule_tests.sh b/tools/testing/selftests/net/fib_rule_tests.sh index 89034c5b69dc..53c5c1ad437e 100755 --- a/tools/testing/selftests/net/fib_rule_tests.sh +++ b/tools/testing/selftests/net/fib_rule_tests.sh @@ -51,31 +51,6 @@ log_test() fi } -check_nettest() -{ - if which nettest > /dev/null 2>&1; then - return 0 - fi - - # Add the selftest directory to PATH if not already done - if [ "${SELFTEST_PATH}" = "" ]; then - SELFTEST_PATH="$(dirname $0)" - PATH="${PATH}:${SELFTEST_PATH}" - - # Now retry with the new path - if which nettest > /dev/null 2>&1; then - return 0 - fi - - if [ "${ret}" -eq 0 ]; then - ret="${ksft_skip}" - fi - echo "nettest not found (try 'make -C ${SELFTEST_PATH} nettest')" - fi - - return 1 -} - setup() { set -e @@ -317,11 +292,6 @@ fib_rule6_connect_test() echo echo "IPv6 FIB rule connect tests" - if ! check_nettest; then - echo "SKIP: Could not run test without nettest tool" - return - fi - setup_peer $IP -6 rule add dsfield 0x04 table $RTABLE_PEER @@ -516,11 +486,6 @@ fib_rule4_connect_test() echo echo "IPv4 FIB rule connect tests" - if ! check_nettest; then - echo "SKIP: Could not run test without nettest tool" - return - fi - setup_peer $IP -4 rule add dsfield 0x04 table $RTABLE_PEER @@ -584,6 +549,8 @@ if [ ! -x "$(command -v ip)" ]; then exit $ksft_skip fi +check_gen_prog "nettest" + # start clean cleanup &> /dev/null setup diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 8ee4489238ca..be8707bfb46e 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -125,6 +125,21 @@ slowwait_for_counter() slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@" } +# Check for existence of tools which are built as part of selftests +# but may also already exist in $PATH +check_gen_prog() +{ + local prog_name=$1; shift + + if ! which $prog_name >/dev/null 2>/dev/null; then + PATH=$PWD:$PATH + if ! which $prog_name >/dev/null; then + echo "'$prog_name' command not found; skipping tests" + exit $ksft_skip + fi + fi +} + remove_ns_list() { local item=$1 diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 24a50622406c..569bce8b6383 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -681,13 +681,7 @@ setup_xfrm() { } setup_nettest_xfrm() { - if ! which nettest >/dev/null; then - PATH=$PWD:$PATH - if ! which nettest >/dev/null; then - echo "'nettest' command not found; skipping tests" - return 1 - fi - fi + check_gen_prog "nettest" [ ${1} -eq 6 ] && proto="-6" || proto="" port=${2} diff --git a/tools/testing/selftests/net/settings b/tools/testing/selftests/net/settings index ed8418e8217a..a38764182822 100644 --- a/tools/testing/selftests/net/settings +++ b/tools/testing/selftests/net/settings @@ -1 +1,2 @@ timeout=3600 +profile=1 diff --git a/tools/testing/selftests/net/unicast_extensions.sh b/tools/testing/selftests/net/unicast_extensions.sh index f52aa5f7da52..3e751234ccfe 100755 --- a/tools/testing/selftests/net/unicast_extensions.sh +++ b/tools/testing/selftests/net/unicast_extensions.sh @@ -30,14 +30,7 @@ source lib.sh -# nettest can be run from PATH or from same directory as this selftest -if ! which nettest >/dev/null; then - PATH=$PWD:$PATH - if ! which nettest >/dev/null; then - echo "'nettest' command not found; skipping tests" - exit $ksft_skip - fi -fi +check_gen_prog "nettest" result=0 diff --git a/tools/testing/selftests/net/vrf_route_leaking.sh b/tools/testing/selftests/net/vrf_route_leaking.sh index 152171fb1fc8..e9c2f71da207 100755 --- a/tools/testing/selftests/net/vrf_route_leaking.sh +++ b/tools/testing/selftests/net/vrf_route_leaking.sh @@ -59,7 +59,6 @@ # while it is forwarded between different vrfs. source lib.sh -PATH=$PWD:$PWD/tools/testing/selftests/net:$PATH VERBOSE=0 PAUSE_ON_FAIL=no DEFAULT_TTYPE=sym @@ -636,6 +635,8 @@ EOF # Some systems don't have a ping6 binary anymore command -v ping6 > /dev/null 2>&1 && ping6=$(command -v ping6) || ping6=$(command -v ping) +check_gen_prog "nettest" + TESTS_IPV4="ipv4_ping_ttl ipv4_traceroute ipv4_ping_frag ipv4_ping_local ipv4_tcp_local ipv4_udp_local ipv4_ping_ttl_asym ipv4_traceroute_asym" TESTS_IPV6="ipv6_ping_ttl ipv6_traceroute ipv6_ping_local ipv6_tcp_local ipv6_udp_local -- 2.46.0

1 year, 3 months

3
5
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[PATCH net 00/14] mptcp: pm: fix IDs not being reusable

by Matthieu Baerts (NGI0)

Here are more fixes for the MPTCP in-kernel path-manager. In this series, the fixes are around the endpoint IDs not being reusable for on-going connections when re-creating endpoints with previously used IDs. - Patch 1 fixes this case for endpoints being used to send ADD_ADDR. Patch 2 validates this fix. The issue is present since v5.10. - Patch 3 fixes this case for endpoints being used to establish new subflows. Patch 4 validates this fix. The issue is present since v5.10. - Patch 5 fixes this case when all endpoints are flushed. Patch 6 validates this fix. The issue is present since v5.13. - Patch 7 removes a helper that is confusing, and introduced in v5.10. It helps simplifying the next patches. - Patch 8 makes sure a 'subflow' counter is only decremented when removing a 'subflow' endpoint. Can be backported up to v5.13. - Patch 9 is similar, but for a 'signal' counter. Can be backported up to v5.10. - Patch 10 checks the last max accepted ADD_ADDR limit before accepting new ADD_ADDR. For v5.10 as well. - Patch 11 removes a wrong restriction for the userspace PM, added during a refactoring in v6.5. - Patch 12 makes sure the fullmesh mode sets the ID 0 when a new subflow using the source address of the initial subflow is created. Patch 13 covers this case. This issue is present since v5.15. - Patch 14 avoid possible UaF when selecting an address from the endpoints list. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Matthieu Baerts (NGI0) (14): mptcp: pm: re-using ID of unused removed ADD_ADDR selftests: mptcp: join: check re-using ID of unused ADD_ADDR mptcp: pm: re-using ID of unused removed subflows selftests: mptcp: join: check re-using ID of closed subflow mptcp: pm: re-using ID of unused flushed subflows selftests: mptcp: join: test for flush/re-add endpoints mptcp: pm: remove mptcp_pm_remove_subflow() mptcp: pm: only mark 'subflow' endp as available mptcp: pm: only decrement add_addr_accepted for MPJ req mptcp: pm: check add_addr_accept_max before accepting new ADD_ADDR mptcp: pm: only in-kernel cannot have entries with ID 0 mptcp: pm: fullmesh: select the right ID later selftests: mptcp: join: validate fullmesh endp on 1st sf mptcp: pm: avoid possible UaF when selecting endp net/mptcp/pm.c | 13 --- net/mptcp/pm_netlink.c | 142 ++++++++++++++++-------- net/mptcp/protocol.h | 3 - tools/testing/selftests/net/mptcp/mptcp_join.sh | 76 +++++++++++-- 4 files changed, 160 insertions(+), 74 deletions(-) --- base-commit: 565d121b69980637f040eb4d84289869cdaabedf change-id: 20240819-net-mptcp-pm-reusing-id-eb08827b7be6 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

1 year, 3 months

2
15
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kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v6.11-rc1-13-g41f37c852ac3f)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v6.11-rc1-13-g41f37c852ac3f) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.11-rc1-13-g41… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: v6.11-rc1-13-g41f37c852ac3f URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 41f37c852ac3fbfd072a00281b60dc7ba056be8c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/66c5128498efe3795cc86925 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.11-rc1-13-g41f37c852ac3f/ar… HTML log: https://storage.kernelci.org//kselftest/next/v6.11-rc1-13-g41f37c852ac3f/ar… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/66c5128498efe3795cc86926 failing since 21 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

1 year, 3 months

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kselftest/next kselftest-lib: 1 runs, 1 regressions (v6.11-rc1-13-g41f37c852ac3f)

by kernelci.org bot

kselftest/next kselftest-lib: 1 runs, 1 regressions (v6.11-rc1-13-g41f37c852ac3f) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.11-rc1-13-g41… Test: kselftest-lib Tree: kselftest Branch: next Describe: v6.11-rc1-13-g41f37c852ac3f URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 41f37c852ac3fbfd072a00281b60dc7ba056be8c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/66c5140122b4b11599c8685e Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.11-rc1-13-g41f37c852ac3f/ar… HTML log: https://storage.kernelci.org//kselftest/next/v6.11-rc1-13-g41f37c852ac3f/ar… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/66c5140122b4b11599c8685f failing since 21 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

1 year, 3 months

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kselftest/next kselftest-seccomp: 1 runs, 1 regressions (v6.11-rc1-13-g41f37c852ac3f)

by kernelci.org bot

kselftest/next kselftest-seccomp: 1 runs, 1 regressions (v6.11-rc1-13-g41f37c852ac3f) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.11-rc1-13-g41… Test: kselftest-seccomp Tree: kselftest Branch: next Describe: v6.11-rc1-13-g41f37c852ac3f URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 41f37c852ac3fbfd072a00281b60dc7ba056be8c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/66c5157c7ea50df009c86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.11-rc1-13-g41f37c852ac3f/ar… HTML log: https://storage.kernelci.org//kselftest/next/v6.11-rc1-13-g41f37c852ac3f/ar… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-seccomp.login: https://kernelci.org/test/case/id/66c5157c7ea50df009c86856 failing since 21 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

1 year, 3 months

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[PATCH net-next] selftests: net/forwarding: spawn sh inside vrf to speed up ping loop

by Jakub Kicinski

Looking at timestamped output of netdev CI reveals that most of the time in forwarding tests for custom route hashing is spent on a single case, namely the test which uses ping (mausezahn does not support flow labels). On a non-debug kernel we spend 714 of 730 total test runtime (97%) on this test case. While having flow label support in a traffic gen tool / mausezahn would be best, we can significantly speed up the loop by putting ip vrf exec outside of the iteration. In a test of 1000 pings using a normal loop takes 50 seconds to finish. While using: ip vrf exec $vrf sh -c "$loop-body" takes 12 seconds (1/4 of the time). Some of the slowness is likely due to our inefficient virtualization setup, but even on my laptop running "ip link help" 16k times takes 25-30 seconds, so I think it's worth optimizing even for fastest setups. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: shuah(a)kernel.org CC: idosch(a)nvidia.com CC: linux-kselftest(a)vger.kernel.org --- .../selftests/net/forwarding/custom_multipath_hash.sh | 8 ++++---- .../selftests/net/forwarding/gre_custom_multipath_hash.sh | 8 ++++---- .../net/forwarding/ip6gre_custom_multipath_hash.sh | 8 ++++---- 3 files changed, 12 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh index 1783c10215e5..7d531f7091e6 100755 --- a/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh +++ b/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh @@ -224,10 +224,10 @@ send_dst_ipv6() send_flowlabel() { # Generate 16384 echo requests, each with a random flow label. - for _ in $(seq 1 16384); do - ip vrf exec v$h1 \ - $PING6 2001:db8:4::2 -F 0 -c 1 -q >/dev/null 2>&1 - done + ip vrf exec v$h1 sh -c \ + "for _ in {1..16384}; do \ + $PING6 2001:db8:4::2 -F 0 -c 1 -q >/dev/null 2>&1; \ + done" } send_src_udp6() diff --git a/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh index 9788bd0f6e8b..dda11a4a9450 100755 --- a/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh +++ b/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh @@ -319,10 +319,10 @@ send_dst_ipv6() send_flowlabel() { # Generate 16384 echo requests, each with a random flow label. - for _ in $(seq 1 16384); do - ip vrf exec v$h1 \ - $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1 - done + ip vrf exec v$h1 sh -c \ + "for _ in {1..16384}; do \ + $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1; \ + done" } send_src_udp6() diff --git a/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh index 2ab9eaaa5532..e28b4a079e52 100755 --- a/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh +++ b/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh @@ -321,10 +321,10 @@ send_dst_ipv6() send_flowlabel() { # Generate 16384 echo requests, each with a random flow label. - for _ in $(seq 1 16384); do - ip vrf exec v$h1 \ - $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1 - done + ip vrf exec v$h1 sh -c \ + "for _ in {1..16384}; do \ + $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1; \ + done" } send_src_udp6() -- 2.46.0

1 year, 3 months

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[PATCH v2] kunit: Device wrappers should also manage driver name

by David Gow

kunit_driver_create() accepts a name for the driver, but does not copy it, so if that name is either on the stack, or otherwise freed, we end up with a use-after-free when the driver is cleaned up. Instead, strdup() the name, and manage it as another KUnit allocation. As there was no existing kunit_kstrdup(), we add one. Further, add a kunit_ variant of strdup_const() and kfree_const(), so we don't need to allocate and manage the string in the majority of cases where it's a constant. However, these are inline functions, and is_kernel_rodata() only works for built-in code. This causes problems in two cases: - If kunit is built as a module, __{start,end}_rodata is not defined. - If a kunit test using these functions is built as a module, it will suffer the same fate. This fixes a KASAN splat with overflow.overflow_allocation_test, when built as a module. Restrict the is_kernel_rodata() case to when KUnit is built as a module, which fixes the first case, at the cost of losing the optimisation. Also, make kunit_{kstrdup,kfree}_const non-inline, so that other modules using them will not accidentally depend on is_kernel_rodata(). If KUnit is built-in, they'll benefit from the optimisation, if KUnit is not, they won't, but the string will be properly duplicated. Fixes: d03c720e03bd ("kunit: Add APIs for managing devices") Reported-by: Nico Pache <npache(a)redhat.com> Closes: https://groups.google.com/g/kunit-dev/c/81V9b9QYON0 Reviewed-by: Kees Cook <kees(a)kernel.org> Reviewed-by: Maxime Ripard <mripard(a)kernel.org> Reviewed-by: Rae Moar <rmoar(a)google.com> Signed-off-by: David Gow <davidgow(a)google.com> --- This is a combination of the previous version of this patch with the follow-up fix "kunit: Fix kunit_kstrdup_const() with modules". kunit_kstrdup_const() now falls back to kstrdup() if KUnit is built as a module, and is no longer inlined. This should fix the issues we'd seen before. I've not tried doing something fancy by looking at module rodata sections: it might be a possible optimisation, but it seems like it'd overcomplicate things for this initial change. If we hit a KUnit test where this is a bottleneck (or if I have some more spare time), we can look into it. The overflow_kunit test has been fixed independently to not rely on this anyway, so there shouldn't be any current cases of this causing issues, but it's worth making the API robust regardless. Changes since previous version: https://lore.kernel.org/linux-kselftest/20240731070207.3918687-1-davidgow@g… - Fix module support by integrating: https://lore.kernel.org/linux-kselftest/20240806020136.3481593-1-davidgow@g… --- include/kunit/test.h | 48 ++++++++++++++++++++++++++++++++++++++++++++ lib/kunit/device.c | 7 +++++-- lib/kunit/test.c | 19 ++++++++++++++++++ 3 files changed, 72 insertions(+), 2 deletions(-) diff --git a/include/kunit/test.h b/include/kunit/test.h index e2a1f0928e8b..5ac237c949a0 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -28,6 +28,7 @@ #include <linux/types.h> #include <asm/rwonce.h> +#include <asm/sections.h> /* Static key: true if any KUnit tests are currently running */ DECLARE_STATIC_KEY_FALSE(kunit_running); @@ -480,6 +481,53 @@ static inline void *kunit_kcalloc(struct kunit *test, size_t n, size_t size, gfp return kunit_kmalloc_array(test, n, size, gfp | __GFP_ZERO); } + +/** + * kunit_kfree_const() - conditionally free test managed memory + * @x: pointer to the memory + * + * Calls kunit_kfree() only if @x is not in .rodata section. + * See kunit_kstrdup_const() for more information. + */ +void kunit_kfree_const(struct kunit *test, const void *x); + +/** + * kunit_kstrdup() - Duplicates a string into a test managed allocation. + * + * @test: The test context object. + * @str: The NULL-terminated string to duplicate. + * @gfp: flags passed to underlying kmalloc(). + * + * See kstrdup() and kunit_kmalloc_array() for more information. + */ +static inline char *kunit_kstrdup(struct kunit *test, const char *str, gfp_t gfp) +{ + size_t len; + char *buf; + + if (!str) + return NULL; + + len = strlen(str) + 1; + buf = kunit_kmalloc(test, len, gfp); + if (buf) + memcpy(buf, str, len); + return buf; +} + +/** + * kunit_kstrdup_const() - Conditionally duplicates a string into a test managed allocation. + * + * @test: The test context object. + * @str: The NULL-terminated string to duplicate. + * @gfp: flags passed to underlying kmalloc(). + * + * Calls kunit_kstrdup() only if @str is not in the rodata section. Must be freed with + * kunit_kfree_const() -- not kunit_kfree(). + * See kstrdup_const() and kunit_kmalloc_array() for more information. + */ +const char *kunit_kstrdup_const(struct kunit *test, const char *str, gfp_t gfp); + /** * kunit_vm_mmap() - Allocate KUnit-tracked vm_mmap() area * @test: The test context object. diff --git a/lib/kunit/device.c b/lib/kunit/device.c index 25c81ed465fb..520c1fccee8a 100644 --- a/lib/kunit/device.c +++ b/lib/kunit/device.c @@ -89,7 +89,7 @@ struct device_driver *kunit_driver_create(struct kunit *test, const char *name) if (!driver) return ERR_PTR(err); - driver->name = name; + driver->name = kunit_kstrdup_const(test, name, GFP_KERNEL); driver->bus = &kunit_bus_type; driver->owner = THIS_MODULE; @@ -192,8 +192,11 @@ void kunit_device_unregister(struct kunit *test, struct device *dev) const struct device_driver *driver = to_kunit_device(dev)->driver; kunit_release_action(test, device_unregister_wrapper, dev); - if (driver) + if (driver) { + const char *driver_name = driver->name; kunit_release_action(test, driver_unregister_wrapper, (void *)driver); + kunit_kfree_const(test, driver_name); + } } EXPORT_SYMBOL_GPL(kunit_device_unregister); diff --git a/lib/kunit/test.c b/lib/kunit/test.c index e8b1b52a19ab..089c832e3cdb 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -874,6 +874,25 @@ void kunit_kfree(struct kunit *test, const void *ptr) } EXPORT_SYMBOL_GPL(kunit_kfree); +void kunit_kfree_const(struct kunit *test, const void *x) +{ +#if !IS_MODULE(CONFIG_KUNIT) + if (!is_kernel_rodata((unsigned long)x)) +#endif + kunit_kfree(test, x); +} +EXPORT_SYMBOL_GPL(kunit_kfree_const); + +const char *kunit_kstrdup_const(struct kunit *test, const char *str, gfp_t gfp) +{ +#if !IS_MODULE(CONFIG_KUNIT) + if (is_kernel_rodata((unsigned long)str)) + return str; +#endif + return kunit_kstrdup(test, str, gfp); +} +EXPORT_SYMBOL_GPL(kunit_kstrdup_const); + void kunit_cleanup(struct kunit *test) { struct kunit_resource *res; -- 2.46.0.184.g6999bdac58-goog

1 year, 3 months

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kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (v6.11-rc1-13-g41f37c852ac3f)

by kernelci.org bot

kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (v6.11-rc1-13-g41f37c852ac3f) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.11-rc1-13-g41f37… Tree: kselftest Branch: next Git Describe: v6.11-rc1-13-g41f37c852ac3f Git Commit: 41f37c852ac3fbfd072a00281b60dc7ba056be8c Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x39: relocation to !ENDBR: .text+0x14ef94 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x39: relocation to !ENDBR: .text+0x14ef94 -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

1 year, 3 months

1
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[PATCH v9 00/13] riscv: Add support for xtheadvector

by Charlie Jenkins

xtheadvector is a custom extension that is based upon riscv vector version 0.7.1 [1]. All of the vector routines have been modified to support this alternative vector version based upon whether xtheadvector was determined to be supported at boot. vlenb is not supported on the existing xtheadvector hardware, so a devicetree property thead,vlenb is added to provide the vlenb to Linux. There is a new hwprobe key RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0 that is used to request which thead vendor extensions are supported on the current platform. This allows future vendors to allocate hwprobe keys for their vendor. Support for xtheadvector is also added to the vector kselftests. Signed-off-by: Charlie Jenkins <charlie(a)rivosinc.com> [1] https://github.com/T-head-Semi/thead-extension-spec/blob/95358cb2cca9489361… --- This series is a continuation of a different series that was fragmented into two other series in an attempt to get part of it merged in the 6.10 merge window. The split-off series did not get merged due to a NAK on the series that added the generic riscv,vlenb devicetree entry. This series has converted riscv,vlenb to thead,vlenb to remedy this issue. The original series is titled "riscv: Support vendor extensions and xtheadvector" [3]. The series titled "riscv: Extend cpufeature.c to detect vendor extensions" is still under development and this series is based on that series! [4] I have tested this with an Allwinner Nezha board. I ran into issues booting the board after 6.9-rc1 so I applied these patches to 6.8. There are a couple of minor merge conflicts that do arrise when doing that, so please let me know if you have been able to boot this board with a 6.9 kernel. I used SkiffOS [1] to manage building the image, but upgraded the U-Boot version to Samuel Holland's more up-to-date version [2] and changed out the device tree used by U-Boot with the device trees that are present in upstream linux and this series. Thank you Samuel for all of the work you did to make this task possible. [1] https://github.com/skiffos/SkiffOS/tree/master/configs/allwinner/nezha [2] https://github.com/smaeul/u-boot/commit/2e89b706f5c956a70c989cd31665f1429e9… [3] https://lore.kernel.org/all/20240503-dev-charlie-support_thead_vector_6_9-v… [4] https://lore.kernel.org/lkml/20240719-support_vendor_extensions-v3-4-0af758… --- Changes in v9: - Rebase onto palmer's for-next - Fix sparse error in arch/riscv/kernel/vendor_extensions/thead.c - Fix maybe-uninitialized warning in arch/riscv/include/asm/vendor_extensions/vendor_hwprobe.h - Wrap some long lines - Link to v8: https://lore.kernel.org/r/20240724-xtheadvector-v8-0-cf043168e137@rivosinc.… Changes in v8: - Rebase onto palmer's for-next - Link to v7: https://lore.kernel.org/r/20240724-xtheadvector-v7-0-b741910ada3e@rivosinc.… Changes in v7: - Add defs for has_xtheadvector_no_alternatives() and has_xtheadvector() when vector disabled. (Palmer) - Link to v6: https://lore.kernel.org/r/20240722-xtheadvector-v6-0-c9af0130fa00@rivosinc.… Changes in v6: - Fix return type of is_vector_supported()/is_xthead_supported() to be bool - Link to v5: https://lore.kernel.org/r/20240719-xtheadvector-v5-0-4b485fc7d55f@rivosinc.… Changes in v5: - Rebase on for-next - Link to v4: https://lore.kernel.org/r/20240702-xtheadvector-v4-0-2bad6820db11@rivosinc.… Changes in v4: - Replace inline asm with C (Samuel) - Rename VCSRs to CSRs (Samuel) - Replace .insn directives with .4byte directives - Link to v3: https://lore.kernel.org/r/20240619-xtheadvector-v3-0-bff39eb9668e@rivosinc.… Changes in v3: - Add back Heiko's signed-off-by (Conor) - Mark RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0 as a bitmask - Link to v2: https://lore.kernel.org/r/20240610-xtheadvector-v2-0-97a48613ad64@rivosinc.… Changes in v2: - Removed extraneous references to "riscv,vlenb" (Jess) - Moved declaration of "thead,vlenb" into cpus.yaml and added restriction that it's only applicable to thead cores (Conor) - Check CONFIG_RISCV_ISA_XTHEADVECTOR instead of CONFIG_RISCV_ISA_V for thead,vlenb (Jess) - Fix naming of hwprobe variables (Evan) - Link to v1: https://lore.kernel.org/r/20240609-xtheadvector-v1-0-3fe591d7f109@rivosinc.… --- Charlie Jenkins (12): dt-bindings: riscv: Add xtheadvector ISA extension description dt-bindings: cpus: add a thead vlen register length property riscv: dts: allwinner: Add xtheadvector to the D1/D1s devicetree riscv: Add thead and xtheadvector as a vendor extension riscv: vector: Use vlenb from DT for thead riscv: csr: Add CSR encodings for CSR_VXRM/CSR_VXSAT riscv: Add xtheadvector instruction definitions riscv: vector: Support xtheadvector save/restore riscv: hwprobe: Add thead vendor extension probing riscv: hwprobe: Document thead vendor extensions and xtheadvector extension selftests: riscv: Fix vector tests selftests: riscv: Support xtheadvector in vector tests Heiko Stuebner (1): RISC-V: define the elements of the VCSR vector CSR Documentation/arch/riscv/hwprobe.rst | 10 + Documentation/devicetree/bindings/riscv/cpus.yaml | 19 ++ .../devicetree/bindings/riscv/extensions.yaml | 10 + arch/riscv/Kconfig.vendor | 26 ++ arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi | 3 +- arch/riscv/include/asm/cpufeature.h | 2 + arch/riscv/include/asm/csr.h | 15 + arch/riscv/include/asm/hwprobe.h | 3 +- arch/riscv/include/asm/switch_to.h | 2 +- arch/riscv/include/asm/vector.h | 225 +++++++++++---- arch/riscv/include/asm/vendor_extensions/thead.h | 42 +++ .../include/asm/vendor_extensions/thead_hwprobe.h | 19 ++ .../include/asm/vendor_extensions/vendor_hwprobe.h | 37 +++ arch/riscv/include/uapi/asm/hwprobe.h | 3 +- arch/riscv/include/uapi/asm/vendor/thead.h | 3 + arch/riscv/kernel/cpufeature.c | 52 +++- arch/riscv/kernel/kernel_mode_vector.c | 8 +- arch/riscv/kernel/process.c | 4 +- arch/riscv/kernel/signal.c | 6 +- arch/riscv/kernel/sys_hwprobe.c | 5 + arch/riscv/kernel/vector.c | 24 +- arch/riscv/kernel/vendor_extensions.c | 10 + arch/riscv/kernel/vendor_extensions/Makefile | 2 + arch/riscv/kernel/vendor_extensions/thead.c | 18 ++ .../riscv/kernel/vendor_extensions/thead_hwprobe.c | 19 ++ tools/testing/selftests/riscv/vector/.gitignore | 3 +- tools/testing/selftests/riscv/vector/Makefile | 17 +- .../selftests/riscv/vector/v_exec_initval_nolibc.c | 94 +++++++ tools/testing/selftests/riscv/vector/v_helpers.c | 68 +++++ tools/testing/selftests/riscv/vector/v_helpers.h | 8 + tools/testing/selftests/riscv/vector/v_initval.c | 22 ++ .../selftests/riscv/vector/v_initval_nolibc.c | 68 ----- .../selftests/riscv/vector/vstate_exec_nolibc.c | 20 +- .../testing/selftests/riscv/vector/vstate_prctl.c | 305 +++++++++++++-------- 34 files changed, 901 insertions(+), 271 deletions(-) --- base-commit: 7c08a2615f149f64fb1bb4660997e152fb3a11a7 change-id: 20240530-xtheadvector-833d3d17b423 -- - Charlie

1 year, 3 months

2
18
0 0

[PATCH v2] selftests: kvm: fix mkdir error when building for unsupported arch

by Muhammad Usama Anjum

The tests are built on per architecture basis. When unsupported architecture is specified, it has no tests and TEST_GEN_PROGS is empty. The lib.mk has support for not building anything for such case. But KVM makefile doesn't handle such case correctly. It doesn't check if TEST_GEN_PROGS is empty or not and try to create directory by mkdir. Hence mkdir generates the error. mkdir: missing operand Try 'mkdir --help' for more information. This can be easily fixed by checking if TEST_GEN_PROGS isn't empty before calling mkdir. Cc: Paolo Bonzini <pbonzini(a)redhat.com> Cc: Sean Christopherson <seanjc(a)google.com> Signed-off-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> --- Changes since v1: - Instead of ignoring error, check TEST_GEN_PROGS's validity first --- tools/testing/selftests/kvm/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 48d32c5aa3eb7..9f8ed82ff1d65 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -317,7 +317,9 @@ $(LIBKVM_S_OBJ): $(OUTPUT)/%.o: %.S $(GEN_HDRS) $(LIBKVM_STRING_OBJ): $(OUTPUT)/%.o: %.c $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -ffreestanding $< -o $@ +ifneq ($(strip $(TEST_GEN_PROGS)),) $(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS)))) +endif $(SPLIT_TEST_GEN_OBJ): $(GEN_HDRS) $(TEST_GEN_PROGS): $(LIBKVM_OBJS) $(TEST_GEN_PROGS_EXTENDED): $(LIBKVM_OBJS) -- 2.39.2

1 year, 3 months

6
5
0 0

[PATCH bpf-next] bpf: use kfunc hooks instead of program types

by Matteo Croce

From: Matteo Croce <teknoraver(a)meta.com> Pass to register_btf_kfunc_id_set() a btf_kfunc_hook directly, instead of a bpf_prog_type. Many program types share the same kfunc hook, so some calls to register_btf_kfunc_id_set() can be removed. Tested compiling the kernel with -Werror=enum-conversion to catch all the occourrences. Signed-off-by: Matteo Croce <teknoraver(a)meta.com> --- Documentation/bpf/kfuncs.rst | 2 +- drivers/hid/bpf/hid_bpf_dispatch.c | 4 +-- fs/bpf_fs_kfuncs.c | 2 +- fs/verity/measure.c | 2 +- include/linux/btf.h | 22 ++++++++++++++-- kernel/bpf/arena.c | 2 +- kernel/bpf/btf.c | 23 +---------------- kernel/bpf/cpumask.c | 6 ++--- kernel/bpf/crypto.c | 8 +++--- kernel/bpf/helpers.c | 15 +++++------ kernel/bpf/map_iter.c | 2 +- kernel/cgroup/rstat.c | 2 +- kernel/trace/bpf_trace.c | 4 +-- net/bpf/test_run.c | 6 ++--- net/core/filter.c | 25 ++++++++----------- net/core/xdp.c | 2 +- net/ipv4/bpf_tcp_ca.c | 2 +- net/ipv4/fou_bpf.c | 2 +- net/ipv4/tcp_bbr.c | 2 +- net/ipv4/tcp_cubic.c | 2 +- net/ipv4/tcp_dctcp.c | 2 +- net/netfilter/nf_conntrack_bpf.c | 4 +-- net/netfilter/nf_flow_table_bpf.c | 2 +- net/netfilter/nf_nat_bpf.c | 4 +-- net/xfrm/xfrm_interface_bpf.c | 2 +- net/xfrm/xfrm_state_bpf.c | 2 +- .../selftests/bpf/bpf_testmod/bpf_testmod.c | 8 +++--- 27 files changed, 76 insertions(+), 83 deletions(-) diff --git a/Documentation/bpf/kfuncs.rst b/Documentation/bpf/kfuncs.rst index a8f5782bd833..136c449b26d4 100644 --- a/Documentation/bpf/kfuncs.rst +++ b/Documentation/bpf/kfuncs.rst @@ -359,7 +359,7 @@ type. An example is shown below:: static int init_subsystem(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_task_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_task_kfunc_set); } late_initcall(init_subsystem); diff --git a/drivers/hid/bpf/hid_bpf_dispatch.c b/drivers/hid/bpf/hid_bpf_dispatch.c index a272a086c950..37a87d70a382 100644 --- a/drivers/hid/bpf/hid_bpf_dispatch.c +++ b/drivers/hid/bpf/hid_bpf_dispatch.c @@ -660,13 +660,13 @@ static int __init hid_bpf_init(void) * This is not a big deal: nobody will be able to use the functionality. */ - err = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &hid_bpf_kfunc_set); + err = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &hid_bpf_kfunc_set); if (err) { pr_warn("error while setting HID BPF tracing kfuncs: %d", err); return 0; } - err = register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, &hid_bpf_syscall_kfunc_set); + err = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SYSCALL, &hid_bpf_syscall_kfunc_set); if (err) { pr_warn("error while setting HID BPF syscall kfuncs: %d", err); return 0; diff --git a/fs/bpf_fs_kfuncs.c b/fs/bpf_fs_kfuncs.c index 3fe9f59ef867..2661c9a4f858 100644 --- a/fs/bpf_fs_kfuncs.c +++ b/fs/bpf_fs_kfuncs.c @@ -179,7 +179,7 @@ static const struct btf_kfunc_id_set bpf_fs_kfunc_set = { static int __init bpf_fs_kfuncs_init(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_LSM, &bpf_fs_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_fs_kfunc_set); } late_initcall(bpf_fs_kfuncs_init); diff --git a/fs/verity/measure.c b/fs/verity/measure.c index 175d2f1bc089..00f1a6077a77 100644 --- a/fs/verity/measure.c +++ b/fs/verity/measure.c @@ -181,7 +181,7 @@ static const struct btf_kfunc_id_set bpf_fsverity_set = { void __init fsverity_init_bpf(void) { - register_btf_kfunc_id_set(BPF_PROG_TYPE_LSM, &bpf_fsverity_set); + register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_fsverity_set); } #endif /* CONFIG_BPF_SYSCALL */ diff --git a/include/linux/btf.h b/include/linux/btf.h index cffb43133c68..2da205e0f923 100644 --- a/include/linux/btf.h +++ b/include/linux/btf.h @@ -114,6 +114,24 @@ struct bpf_prog; typedef int (*btf_kfunc_filter_t)(const struct bpf_prog *prog, u32 kfunc_id); +enum btf_kfunc_hook { + BTF_KFUNC_HOOK_COMMON, + BTF_KFUNC_HOOK_XDP, + BTF_KFUNC_HOOK_TC, + BTF_KFUNC_HOOK_STRUCT_OPS, + BTF_KFUNC_HOOK_TRACING, + BTF_KFUNC_HOOK_SYSCALL, + BTF_KFUNC_HOOK_FMODRET, + BTF_KFUNC_HOOK_CGROUP, + BTF_KFUNC_HOOK_SCHED_ACT, + BTF_KFUNC_HOOK_SK_SKB, + BTF_KFUNC_HOOK_SOCKET_FILTER, + BTF_KFUNC_HOOK_LWT, + BTF_KFUNC_HOOK_NETFILTER, + BTF_KFUNC_HOOK_KPROBE, + BTF_KFUNC_HOOK_MAX, +}; + struct btf_kfunc_id_set { struct module *owner; struct btf_id_set8 *set; @@ -566,7 +584,7 @@ u32 *btf_kfunc_id_set_contains(const struct btf *btf, u32 kfunc_btf_id, const struct bpf_prog *prog); u32 *btf_kfunc_is_modify_return(const struct btf *btf, u32 kfunc_btf_id, const struct bpf_prog *prog); -int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, +int register_btf_kfunc_id_set(enum btf_kfunc_hook hook, const struct btf_kfunc_id_set *s); int register_btf_fmodret_id_set(const struct btf_kfunc_id_set *kset); s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id); @@ -620,7 +638,7 @@ static inline u32 *btf_kfunc_id_set_contains(const struct btf *btf, { return NULL; } -static inline int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, +static inline int register_btf_kfunc_id_set(enum btf_kfunc_hook hook, const struct btf_kfunc_id_set *s) { return 0; diff --git a/kernel/bpf/arena.c b/kernel/bpf/arena.c index e52b3ad231b9..07bafb9327ec 100644 --- a/kernel/bpf/arena.c +++ b/kernel/bpf/arena.c @@ -576,6 +576,6 @@ static const struct btf_kfunc_id_set common_kfunc_set = { static int __init kfunc_init(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_UNSPEC, &common_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_COMMON, &common_kfunc_set); } late_initcall(kfunc_init); diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index b12db397303e..975c1d61aa2d 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -204,24 +204,6 @@ DEFINE_IDR(btf_idr); DEFINE_SPINLOCK(btf_idr_lock); -enum btf_kfunc_hook { - BTF_KFUNC_HOOK_COMMON, - BTF_KFUNC_HOOK_XDP, - BTF_KFUNC_HOOK_TC, - BTF_KFUNC_HOOK_STRUCT_OPS, - BTF_KFUNC_HOOK_TRACING, - BTF_KFUNC_HOOK_SYSCALL, - BTF_KFUNC_HOOK_FMODRET, - BTF_KFUNC_HOOK_CGROUP, - BTF_KFUNC_HOOK_SCHED_ACT, - BTF_KFUNC_HOOK_SK_SKB, - BTF_KFUNC_HOOK_SOCKET_FILTER, - BTF_KFUNC_HOOK_LWT, - BTF_KFUNC_HOOK_NETFILTER, - BTF_KFUNC_HOOK_KPROBE, - BTF_KFUNC_HOOK_MAX, -}; - enum { BTF_KFUNC_SET_MAX_CNT = 256, BTF_DTOR_KFUNC_MAX_CNT = 256, @@ -8389,11 +8371,9 @@ static int __register_btf_kfunc_id_set(enum btf_kfunc_hook hook, } /* This function must be invoked only from initcalls/module init functions */ -int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, +int register_btf_kfunc_id_set(enum btf_kfunc_hook hook, const struct btf_kfunc_id_set *kset) { - enum btf_kfunc_hook hook; - /* All kfuncs need to be tagged as such in BTF. * WARN() for initcall registrations that do not check errors. */ @@ -8402,7 +8382,6 @@ int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, return -EINVAL; } - hook = bpf_prog_type_to_kfunc_hook(prog_type); return __register_btf_kfunc_id_set(hook, kset); } EXPORT_SYMBOL_GPL(register_btf_kfunc_id_set); diff --git a/kernel/bpf/cpumask.c b/kernel/bpf/cpumask.c index 33c473d676a5..1a34689b2c3d 100644 --- a/kernel/bpf/cpumask.c +++ b/kernel/bpf/cpumask.c @@ -472,9 +472,9 @@ static int __init cpumask_kfunc_init(void) }; ret = bpf_mem_alloc_init(&bpf_cpumask_ma, sizeof(struct bpf_cpumask), false); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &cpumask_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &cpumask_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, &cpumask_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &cpumask_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &cpumask_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SYSCALL, &cpumask_kfunc_set); return ret ?: register_btf_id_dtor_kfuncs(cpumask_dtors, ARRAY_SIZE(cpumask_dtors), THIS_MODULE); diff --git a/kernel/bpf/crypto.c b/kernel/bpf/crypto.c index 94854cd9c4cc..1010ffbffa10 100644 --- a/kernel/bpf/crypto.c +++ b/kernel/bpf/crypto.c @@ -380,10 +380,10 @@ static int __init crypto_kfunc_init(void) }, }; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &crypt_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_ACT, &crypt_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &crypt_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &crypt_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SCHED_ACT, &crypt_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &crypt_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SYSCALL, &crypt_init_kfunc_set); return ret ?: register_btf_id_dtor_kfuncs(bpf_crypto_dtors, ARRAY_SIZE(bpf_crypto_dtors), diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 12e3aa40b180..3f3b68207941 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -3070,16 +3070,17 @@ static int __init kfunc_init(void) #endif }; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &generic_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &generic_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &generic_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &generic_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, &generic_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_CGROUP_SKB, &generic_kfunc_set); + + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &generic_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &generic_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &generic_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &generic_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SYSCALL, &generic_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_CGROUP, &generic_kfunc_set); ret = ret ?: register_btf_id_dtor_kfuncs(generic_dtors, ARRAY_SIZE(generic_dtors), THIS_MODULE); - return ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_UNSPEC, &common_kfunc_set); + return ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_COMMON, &common_kfunc_set); } late_initcall(kfunc_init); diff --git a/kernel/bpf/map_iter.c b/kernel/bpf/map_iter.c index 9575314f40a6..60f8133abd05 100644 --- a/kernel/bpf/map_iter.c +++ b/kernel/bpf/map_iter.c @@ -224,6 +224,6 @@ static const struct btf_kfunc_id_set bpf_map_iter_kfunc_set = { static int init_subsystem(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_UNSPEC, &bpf_map_iter_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_COMMON, &bpf_map_iter_kfunc_set); } late_initcall(init_subsystem); diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c index a06b45272411..afaa9a437c1b 100644 --- a/kernel/cgroup/rstat.c +++ b/kernel/cgroup/rstat.c @@ -649,7 +649,7 @@ static const struct btf_kfunc_id_set bpf_rstat_kfunc_set = { static int __init bpf_rstat_kfunc_init(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_rstat_kfunc_set); } late_initcall(bpf_rstat_kfunc_init); diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index b69a39316c0c..c30264e9c3cb 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -1408,7 +1408,7 @@ static const struct btf_kfunc_id_set bpf_key_sig_kfunc_set = { static int __init bpf_key_sig_kfuncs_init(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_key_sig_kfunc_set); } @@ -3473,7 +3473,7 @@ static const struct btf_kfunc_id_set bpf_kprobe_multi_kfunc_set = { static int __init bpf_kprobe_multi_kfuncs_init(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_KPROBE, &bpf_kprobe_multi_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_KPROBE, &bpf_kprobe_multi_kfunc_set); } late_initcall(bpf_kprobe_multi_kfuncs_init); diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 6d7a442ceb89..2ce805125cb2 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -1753,9 +1753,9 @@ static int __init bpf_prog_test_run_init(void) int ret; ret = register_btf_fmodret_id_set(&bpf_test_modify_return_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_prog_test_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_prog_test_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, &bpf_prog_test_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &bpf_prog_test_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_prog_test_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SYSCALL, &bpf_prog_test_kfunc_set); return ret ?: register_btf_id_dtor_kfuncs(bpf_prog_test_dtor_kfunc, ARRAY_SIZE(bpf_prog_test_dtor_kfunc), THIS_MODULE); diff --git a/net/core/filter.c b/net/core/filter.c index 78a6f746ea0b..ce764c31240c 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -12095,20 +12095,15 @@ static int __init bpf_kfunc_init(void) { int ret; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_ACT, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SK_SKB, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SOCKET_FILTER, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_CGROUP_SKB, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_LWT_OUT, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_LWT_IN, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_LWT_XMIT, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_LWT_SEG6LOCAL, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_NETFILTER, &bpf_kfunc_set_skb); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &bpf_kfunc_set_xdp); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_CGROUP_SOCK_ADDR, - &bpf_kfunc_set_sock_addr); - return ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_kfunc_set_tcp_reqsk); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SCHED_ACT, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SK_SKB, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SOCKET_FILTER, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_CGROUP, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_LWT, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_NETFILTER, &bpf_kfunc_set_skb); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &bpf_kfunc_set_xdp); + return ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &bpf_kfunc_set_tcp_reqsk); } late_initcall(bpf_kfunc_init); @@ -12168,6 +12163,6 @@ static const struct btf_kfunc_id_set bpf_sk_iter_kfunc_set = { static int init_subsystem(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_sk_iter_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_sk_iter_kfunc_set); } late_initcall(init_subsystem); diff --git a/net/core/xdp.c b/net/core/xdp.c index bcc5551c6424..d602b9184686 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -797,7 +797,7 @@ bool bpf_dev_bound_kfunc_id(u32 btf_id) static int __init xdp_metadata_init(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &xdp_metadata_kfunc_set); + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &xdp_metadata_kfunc_set); } late_initcall(xdp_metadata_init); diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c index 554804774628..a1fc378cc58c 100644 --- a/net/ipv4/bpf_tcp_ca.c +++ b/net/ipv4/bpf_tcp_ca.c @@ -341,7 +341,7 @@ static int __init bpf_tcp_ca_kfunc_init(void) { int ret; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &bpf_tcp_ca_kfunc_set); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &bpf_tcp_ca_kfunc_set); ret = ret ?: register_bpf_struct_ops(&bpf_tcp_congestion_ops, tcp_congestion_ops); return ret; diff --git a/net/ipv4/fou_bpf.c b/net/ipv4/fou_bpf.c index 54984f3170a8..f9a68a20cd7c 100644 --- a/net/ipv4/fou_bpf.c +++ b/net/ipv4/fou_bpf.c @@ -112,6 +112,6 @@ static const struct btf_kfunc_id_set fou_bpf_kfunc_set = { int register_fou_bpf(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &fou_bpf_kfunc_set); } diff --git a/net/ipv4/tcp_bbr.c b/net/ipv4/tcp_bbr.c index 760941e55153..49d80dbd5f26 100644 --- a/net/ipv4/tcp_bbr.c +++ b/net/ipv4/tcp_bbr.c @@ -1177,7 +1177,7 @@ static int __init bbr_register(void) BUILD_BUG_ON(sizeof(struct bbr) > ICSK_CA_PRIV_SIZE); - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &tcp_bbr_kfunc_set); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &tcp_bbr_kfunc_set); if (ret < 0) return ret; return tcp_register_congestion_control(&tcp_bbr_cong_ops); diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c index 5dbed91c6178..2ed23f429a8c 100644 --- a/net/ipv4/tcp_cubic.c +++ b/net/ipv4/tcp_cubic.c @@ -533,7 +533,7 @@ static int __init cubictcp_register(void) /* divide by bic_scale and by constant Srtt (100ms) */ do_div(cube_factor, bic_scale * 10); - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &tcp_cubic_kfunc_set); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &tcp_cubic_kfunc_set); if (ret < 0) return ret; return tcp_register_congestion_control(&cubictcp); diff --git a/net/ipv4/tcp_dctcp.c b/net/ipv4/tcp_dctcp.c index 8a45a4aea933..b86007e9487d 100644 --- a/net/ipv4/tcp_dctcp.c +++ b/net/ipv4/tcp_dctcp.c @@ -291,7 +291,7 @@ static int __init dctcp_register(void) BUILD_BUG_ON(sizeof(struct dctcp) > ICSK_CA_PRIV_SIZE); - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &tcp_dctcp_kfunc_set); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_STRUCT_OPS, &tcp_dctcp_kfunc_set); if (ret < 0) return ret; return tcp_register_congestion_control(&dctcp); diff --git a/net/netfilter/nf_conntrack_bpf.c b/net/netfilter/nf_conntrack_bpf.c index 4a136fc3a9c0..356559e5505f 100644 --- a/net/netfilter/nf_conntrack_bpf.c +++ b/net/netfilter/nf_conntrack_bpf.c @@ -531,8 +531,8 @@ int register_nf_conntrack_bpf(void) { int ret; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &nf_conntrack_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &nf_conntrack_kfunc_set); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &nf_conntrack_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &nf_conntrack_kfunc_set); if (!ret) { mutex_lock(&nf_conn_btf_access_lock); nfct_btf_struct_access = _nf_conntrack_btf_struct_access; diff --git a/net/netfilter/nf_flow_table_bpf.c b/net/netfilter/nf_flow_table_bpf.c index 4a5f5195f2d2..0166882856a2 100644 --- a/net/netfilter/nf_flow_table_bpf.c +++ b/net/netfilter/nf_flow_table_bpf.c @@ -115,7 +115,7 @@ static const struct btf_kfunc_id_set nf_flow_kfunc_set = { int nf_flow_register_bpf(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &nf_flow_kfunc_set); } EXPORT_SYMBOL_GPL(nf_flow_register_bpf); diff --git a/net/netfilter/nf_nat_bpf.c b/net/netfilter/nf_nat_bpf.c index 481be15609b1..a3300e3618ab 100644 --- a/net/netfilter/nf_nat_bpf.c +++ b/net/netfilter/nf_nat_bpf.c @@ -67,11 +67,11 @@ int register_nf_nat_bpf(void) { int ret; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &nf_bpf_nat_kfunc_set); if (ret) return ret; - return register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &nf_bpf_nat_kfunc_set); } diff --git a/net/xfrm/xfrm_interface_bpf.c b/net/xfrm/xfrm_interface_bpf.c index 5ea15037ebd1..4c3149d22712 100644 --- a/net/xfrm/xfrm_interface_bpf.c +++ b/net/xfrm/xfrm_interface_bpf.c @@ -105,6 +105,6 @@ static const struct btf_kfunc_id_set xfrm_interface_kfunc_set = { int __init register_xfrm_interface_bpf(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &xfrm_interface_kfunc_set); } diff --git a/net/xfrm/xfrm_state_bpf.c b/net/xfrm/xfrm_state_bpf.c index 2248eda741f8..90a3a245c6de 100644 --- a/net/xfrm/xfrm_state_bpf.c +++ b/net/xfrm/xfrm_state_bpf.c @@ -129,6 +129,6 @@ static const struct btf_kfunc_id_set xfrm_state_xdp_kfunc_set = { int __init register_xfrm_state_bpf(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, + return register_btf_kfunc_id_set(BTF_KFUNC_HOOK_XDP, &xfrm_state_xdp_kfunc_set); } diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c index 3687a40b61c6..fbb4d739597d 100644 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c @@ -1088,10 +1088,10 @@ static int bpf_testmod_init(void) void **tramp; int ret; - ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_UNSPEC, &bpf_testmod_common_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_testmod_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_testmod_kfunc_set); - ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, &bpf_testmod_kfunc_set); + ret = register_btf_kfunc_id_set(BTF_KFUNC_HOOK_COMMON, &bpf_testmod_common_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TC, &bpf_testmod_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_TRACING, &bpf_testmod_kfunc_set); + ret = ret ?: register_btf_kfunc_id_set(BTF_KFUNC_HOOK_SYSCALL, &bpf_testmod_kfunc_set); ret = ret ?: register_bpf_struct_ops(&bpf_bpf_testmod_ops, bpf_testmod_ops); ret = ret ?: register_bpf_struct_ops(&bpf_testmod_ops2, bpf_testmod_ops2); ret = ret ?: register_btf_id_dtor_kfuncs(bpf_testmod_dtors, -- 2.45.2

1 year, 3 months

2
1
0 0

[PATCH net-next v21 00/13] Device Memory TCP

by Mina Almasry

v21: https://patchwork.kernel.org/project/netdevbpf/list/?series=880735&state=* ==== v20 addressed some comments and resolved a test failure, but introduced an unfortunate build error with a config edge case I wasn't testing. v21 simply resolves that error. Major Changes: - Resolve build error with CONFIG_PAGE_POOL=n && CONFIG_NET=y Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v21/ v20: https://patchwork.kernel.org/project/netdevbpf/list/?series=879373&state=* ==== v20 aims to resolve a couple of bug reports against v19, and addresses some review comments around the page_pool_check_memory_provider mechanism. Major changes: - Test edge cases such as header split disabled in selftest. - Change `offset = 0` back to `offset = offset - start` to resolve issue found in RX path by Taehee (thanks!) - Address a few comments around page_pool_check_memory_provider() from Pavel & Jakub. - Removed some unnecessary includes across various patches in the series. - Removed unnecessary EXPORT_SYMBOL(page_pool_mem_providers) (Jakub). - Fix regression caused by incorrect dev_get_max_mp_channel check, along with rename (Jakub). Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v20/ v19: https://patchwork.kernel.org/project/netdevbpf/list/?series=876852&state=* ==== v18 got a thorough review (thanks!), and this iteration addresses the feedback. Major changes: - Prevent deactivating mp bound queues. - Prevent installing xdp on mp bound netdevs, or installing mps on xdp installed netdevs. - Fix corner cases in netlink API vis-a-vis missing attributes. - Iron out the unreadable netmem driver support story. To be honest, the conversation with Jakub & Pavel got a bit confusing for me. I've implemented an approach in this set that makes sense to me, and AFAICT, addresses the requirements. It may be good as-is, or it may be a conversation starter/continuer. To be honest IMO there are many ways to skin this cat and I don't see an extremely strong reason to go for one approach over another. Here is one approach you may like. - Don't reset niov dma_addr on allocation & free. - Add some tests to the selftest that catches some of the issues around missing netlink attributes or deactivating mp-bound queues. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v19/ v18: https://patchwork.kernel.org/project/netdevbpf/list/?series=874848&state=* ==== v17 got minor feedback: (a) to beef up the description on patch 1 and (b) to remove the leading underscores in the header definition. I applied (a). (b) seems to be against current conventions so I did not apply before further discussion. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v17/ v17: https://patchwork.kernel.org/project/netdevbpf/list/?series=869900&state=* ==== v16 also got a very thorough review and some testing (thanks again!). Thes version addresses all the concerns reported on v15, in terms of feedback and issues reported. Major changes: - Use ASSERT_RTNL. - Moved around some of the page_pool helpers definitions so I can hide some netmem helpers in private files as Jakub suggested. - Don't make every net_iov hold a ref on the binding as Jakub suggested. - Fix issue reported by Taehee where we access queues after they have been freed. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v17/ v16: https://patchwork.kernel.org/project/netdevbpf/list/?series=866353&state=* ==== v15 got a thorough review and some testing, and this version addresses almost all the feedback. Some more minor comments where the authors said it could be done later, I left out. Major changes: - Addition of dma-buf introspection to page-pool-get and queue-get. - Fixes to selftests suggested by Taehee. - Fixes to documentation suggested by Donald. - A couple of suggestions and fixes to TCP patches by Eric and David. - Fixes to number assignements suggested by Arnd. - Use rtnl_lock()ing to guard against queue reconfiguration while the page_pool initialization is happening. (Jakub). - Fixes to a few warnings reproduced by Taehee. - Fixes to dma-buf binding suggested by Taehee and Jakub. - Fixes to netlink UAPI suggested by Jakub - Applied a number of Reviewed-bys and Acked-bys (including ones I lost from v13+). Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v16/ One caveat: Taehee reproduced a KASAN warning and reported it here: https://lore.kernel.org/netdev/CAMArcTUdCxOBYGF3vpbq=eBvqZfnc44KBaQTN7H-wqd… I estimate the issue to be minor and easily fixable: https://lore.kernel.org/netdev/CAHS8izNgaqC--GGE2xd85QB=utUnOHmioCsDd1TNxJW… I hope to be able to follow up with a fix to net tree as net-next closes imminently, but if this iteration doesn't make it in, I will repost with a fix squashed after net-next reopens, no problem. v15: https://patchwork.kernel.org/project/netdevbpf/list/?series=865481&state=* ==== No material changes in this version, only a fix to linking against libynl.a from the last version. Per Jakub's instructions I've pulled one of his patches into this series, and now use the new libynl.a correctly, I hope. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v15/ v14: https://patchwork.kernel.org/project/netdevbpf/list/?series=865135&archive=… ==== No material changes in this version. Only rebase and re-verification on top of net-next. v13, I think, raced with commit ebad6d0334793 ("net/ipv4: Use nested-BH locking for ipv4_tcp_sk.") being merged to net-next that caused a patchwork failure to apply. This series should apply cleanly on commit c4532232fa2a4 ("selftests: net: remove unneeded IP_GRE config"). I did not wait the customary 24hr as Jakub said it's OK to repost as soon as I build test the rebased version: https://lore.kernel.org/netdev/20240625075926.146d769d@kernel.org/ v13: https://patchwork.kernel.org/project/netdevbpf/list/?series=861406&archive=… ==== Major changes: -------------- This iteration addresses Pavel's review comments, applies his reviewed-by's, and seeks to fix the patchwork build error (sorry!). As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v13/ v12: https://patchwork.kernel.org/project/netdevbpf/list/?series=859747&state=* ==== Major changes: -------------- This iteration only addresses one minor comment from Pavel with regards to the trace printing of netmem, and the patchwork build error introduced in v11 because I missed doing an allmodconfig build, sorry. Other than that v11, AFAICT, received no feedback. There is one discussion about how the specifics of plugging io uring memory through the page pool, but not relevant to content in this particular patchset, AFAICT. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v12/ v11: https://patchwork.kernel.org/project/netdevbpf/list/?series=857457&state=* ==== Major Changes: -------------- v11 addresses feedback received in v10. The major change is the removal of the memory provider ops as requested by Christoph. We still accomplish the same thing, but utilizing direct function calls with if statements rather than generic ops. Additionally address sparse warnings, bugs and review comments from folks that reviewed. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v11/ Detailed changelog: ------------------- - Fixes in netdev_rx_queue_restart() from Pavel & David. - Remove commit e650e8c3a36f5 ("net: page_pool: create hooks for custom page providers") from the series to address Christoph's feedback and rebased other patches on the series on this change. - Fixed build errors with CONFIG_DMA_SHARED_BUFFER && !CONFIG_GENERIC_ALLOCATOR build. - Fixed sparse warnings pointed out by Paolo. - Drop unnecessary gro_pull_from_frag0 checks. - Added Bagas reviewed-by to docs. Cc: Bagas Sanjaya <bagasdotme(a)gmail.com> Cc: Steven Rostedt <rostedt(a)goodmis.org> Cc: Christoph Hellwig <hch(a)infradead.org> Cc: Nikolay Aleksandrov <razor(a)blackwall.org> Cc: Taehee Yoo <ap420073(a)gmail.com> Cc: Donald Hunter <donald.hunter(a)gmail.com> v10: https://patchwork.kernel.org/project/netdevbpf/list/?series=852422&state=* ==== Major Changes: -------------- v9 was sent right before the merge window closed (sorry!). v10 is almost a re-send of the series now that the merge window re-opened. Only rebased to latest net-next and addressed some minor iterative comments received on v9. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v10/ Detailed changelog: ------------------- - Fixed tokens leaking in DONTNEED setsockopt (Nikolay). - Moved net_iov_dma_addr() to devmem.c and made it a devmem specific helpers (David). - Rename hook alloc_pages to alloc_netmems as alloc_pages is now preprocessor macro defined and causes a build error. v9: === Major Changes: -------------- GVE queue API has been merged. Submitting this version as non-RFC after rebasing on top of the merged API, and dropped the out of tree queue API I was carrying on github. Addressed the little feedback v8 has received. Detailed changelog: ------------------ - Added new patch from David Wei to this series for netdev_rx_queue_restart() - Fixed sparse error. - Removed CONFIG_ checks in netmem_is_net_iov() - Flipped skb->readable to skb->unreadable - Minor fixes to selftests & docs. RFC v8: ======= Major Changes: -------------- - Fixed build error generated by patch-by-patch build. - Applied docs suggestions from Randy. RFC v7: ======= Major Changes: -------------- This revision largely rebases on top of net-next and addresses the feedback RFCv6 received from folks, namely Jakub, Yunsheng, Arnd, David, & Pavel. The series remains in RFC because the queue-API ndos defined in this series are not yet implemented. I have a GVE implementation I carry out of tree for my testing. A upstreamable GVE implementation is in the works. Aside from that, in my estimation all the patches are ready for review/merge. Please do take a look. As usual the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v7/ Detailed changelog: - Use admin-perm in netlink API. - Addressed feedback from Jakub with regards to netlink API implementation. - Renamed devmem.c functions to something more appropriate for that file. - Improve the performance seen through the page_pool benchmark. - Fix the value definition of all the SO_DEVMEM_* uapi. - Various fixes to documentation. Perf - page-pool benchmark: --------------------------- Improved performance of bench_page_pool_simple.ko tests compared to v6: https://pastebin.com/raw/v5dYRg8L net-next base: 8 cycle fast path. RFC v6: 10 cycle fast path. RFC v7: 9 cycle fast path. RFC v7 with CONFIG_DMA_SHARED_BUFFER disabled: 8 cycle fast path, same as baseline. Perf - Devmem TCP benchmark: --------------------- Perf is about the same regardless of the changes in v7, namely the removal of the static_branch_unlikely to improve the page_pool benchmark performance: 189/200gbps bi-directional throughput with RX devmem TCP and regular TCP TX i.e. ~95% line rate. RFC v6: ======= Major Changes: -------------- This revision largely rebases on top of net-next and addresses the little feedback RFCv5 received. The series remains in RFC because the queue-API ndos defined in this series are not yet implemented. I have a GVE implementation I carry out of tree for my testing. A upstreamable GVE implementation is in the works. Aside from that, in my estimation all the patches are ready for review/merge. Please do take a look. As usual the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v6/ This version also comes with some performance data recorded in the cover letter (see below changelog). Detailed changelog: - Rebased on top of the merged netmem_ref changes. - Converted skb->dmabuf to skb->readable (Pavel). Pavel's original suggestion was to remove the skb->dmabuf flag entirely, but when I looked into it closely, I found the issue that if we remove the flag we have to dereference the shinfo(skb) pointer to obtain the first frag to tell whether an skb is readable or not. This can cause a performance regression if it dirties the cache line when the shinfo(skb) was not really needed. Instead, I converted the skb->dmabuf flag into a generic skb->readable flag which can be re-used by io_uring 0-copy RX. - Squashed a few locking optimizations from Eric Dumazet in the RX path and the DEVMEM_DONTNEED setsockopt. - Expanded the tests a bit. Added validation for invalid scenarios and added some more coverage. Perf - page-pool benchmark: --------------------------- bench_page_pool_simple.ko tests with and without these changes: https://pastebin.com/raw/ncHDwAbn AFAIK the number that really matters in the perf tests is the 'tasklet_page_pool01_fast_path Per elem'. This one measures at about 8 cycles without the changes but there is some 1 cycle noise in some results. With the patches this regresses to 9 cycles with the changes but there is 1 cycle noise occasionally running this test repeatedly. Lastly I tried disable the static_branch_unlikely() in netmem_is_net_iov() check. To my surprise disabling the static_branch_unlikely() check reduces the fast path back to 8 cycles, but the 1 cycle noise remains. Perf - Devmem TCP benchmark: --------------------- 189/200gbps bi-directional throughput with RX devmem TCP and regular TCP TX i.e. ~95% line rate. Major changes in RFC v5: ======================== 1. Rebased on top of 'Abstract page from net stack' series and used the new netmem type to refer to LSB set pointers instead of re-using struct page. 2. Downgraded this series back to RFC and called it RFC v5. This is because this series is now dependent on 'Abstract page from net stack'[1] and the queue API. Both are removed from the series to reduce the patch # and those bits are fairly independent or pre-requisite work. 3. Reworked the page_pool devmem support to use netmem and for some more unified handling. 4. Reworked the reference counting of net_iov (renamed from page_pool_iov) to use pp_ref_count for refcounting. The full changes including the dependent series and GVE page pool support is here: https://github.com/mina/linux/commits/tcpdevmem-rfcv5/ [1] https://patchwork.kernel.org/project/netdevbpf/list/?series=810774 Major changes in v1: ==================== 1. Implemented MVP queue API ndos to remove the userspace-visible driver reset. 2. Fixed issues in the napi_pp_put_page() devmem frag unref path. 3. Removed RFC tag. Many smaller addressed comments across all the patches (patches have individual change log). Full tree including the rest of the GVE driver changes: https://github.com/mina/linux/commits/tcpdevmem-v1 Changes in RFC v3: ================== 1. Pulled in the memory-provider dependency from Jakub's RFC[1] to make the series reviewable and mergeable. 2. Implemented multi-rx-queue binding which was a todo in v2. 3. Fix to cmsg handling. The sticking point in RFC v2[2] was the device reset required to refill the device rx-queues after the dmabuf bind/unbind. The solution suggested as I understand is a subset of the per-queue management ops Jakub suggested or similar: https://lore.kernel.org/netdev/20230815171638.4c057dcd@kernel.org/ This is not addressed in this revision, because: 1. This point was discussed at netconf & netdev and there is openness to using the current approach of requiring a device reset. 2. Implementing individual queue resetting seems to be difficult for my test bed with GVE. My prototype to test this ran into issues with the rx-queues not coming back up properly if reset individually. At the moment I'm unsure if it's a mistake in the POC or a genuine issue in the virtualization stack behind GVE, which currently doesn't test individual rx-queue restart. 3. Our usecases are not bothered by requiring a device reset to refill the buffer queues, and we'd like to support NICs that run into this limitation with resetting individual queues. My thought is that drivers that have trouble with per-queue configs can use the support in this series, while drivers that support new netdev ops to reset individual queues can automatically reset the queue as part of the dma-buf bind/unbind. The same approach with device resets is presented again for consideration with other sticking points addressed. This proposal includes the rx devmem path only proposed for merge. For a snapshot of my entire tree which includes the GVE POC page pool support & device memory support: https://github.com/torvalds/linux/compare/master...mina:linux:tcpdevmem-v3 [1] https://lore.kernel.org/netdev/f8270765-a27b-6ccf-33ea-cda097168d79@redhat.… [2] https://lore.kernel.org/netdev/CAHS8izOVJGJH5WF68OsRWFKJid1_huzzUK+hpKbLcL4… Changes in RFC v2: ================== The sticking point in RFC v1[1] was the dma-buf pages approach we used to deliver the device memory to the TCP stack. RFC v2 is a proof-of-concept that attempts to resolve this by implementing scatterlist support in the networking stack, such that we can import the dma-buf scatterlist directly. This is the approach proposed at a high level here[2]. Detailed changes: 1. Replaced dma-buf pages approach with importing scatterlist into the page pool. 2. Replace the dma-buf pages centric API with a netlink API. 3. Removed the TX path implementation - there is no issue with implementing the TX path with scatterlist approach, but leaving out the TX path makes it easier to review. 4. Functionality is tested with this proposal, but I have not conducted perf testing yet. I'm not sure there are regressions, but I removed perf claims from the cover letter until they can be re-confirmed. 5. Added Signed-off-by: contributors to the implementation. 6. Fixed some bugs with the RX path since RFC v1. Any feedback welcome, but specifically the biggest pending questions needing feedback IMO are: 1. Feedback on the scatterlist-based approach in general. 2. Netlink API (Patch 1 & 2). 3. Approach to handle all the drivers that expect to receive pages from the page pool (Patch 6). [1] https://lore.kernel.org/netdev/dfe4bae7-13a0-3c5d-d671-f61b375cb0b4@gmail.c… [2] https://lore.kernel.org/netdev/CAHS8izPm6XRS54LdCDZVd0C75tA1zHSu6jLVO8nzTLX… ================== * TL;DR: Device memory TCP (devmem TCP) is a proposal for transferring data to and/or from device memory efficiently, without bouncing the data to a host memory buffer. * Problem: A large amount of data transfers have device memory as the source and/or destination. Accelerators drastically increased the volume of such transfers. Some examples include: - ML accelerators transferring large amounts of training data from storage into GPU/TPU memory. In some cases ML training setup time can be as long as 50% of TPU compute time, improving data transfer throughput & efficiency can help improving GPU/TPU utilization. - Distributed training, where ML accelerators, such as GPUs on different hosts, exchange data among them. - Distributed raw block storage applications transfer large amounts of data with remote SSDs, much of this data does not require host processing. Today, the majority of the Device-to-Device data transfers the network are implemented as the following low level operations: Device-to-Host copy, Host-to-Host network transfer, and Host-to-Device copy. The implementation is suboptimal, especially for bulk data transfers, and can put significant strains on system resources, such as host memory bandwidth, PCIe bandwidth, etc. One important reason behind the current state is the kernel’s lack of semantics to express device to network transfers. * Proposal: In this patch series we attempt to optimize this use case by implementing socket APIs that enable the user to: 1. send device memory across the network directly, and 2. receive incoming network packets directly into device memory. Packet _payloads_ go directly from the NIC to device memory for receive and from device memory to NIC for transmit. Packet _headers_ go to/from host memory and are processed by the TCP/IP stack normally. The NIC _must_ support header split to achieve this. Advantages: - Alleviate host memory bandwidth pressure, compared to existing network-transfer + device-copy semantics. - Alleviate PCIe BW pressure, by limiting data transfer to the lowest level of the PCIe tree, compared to traditional path which sends data through the root complex. * Patch overview: ** Part 1: netlink API Gives user ability to bind dma-buf to an RX queue. ** Part 2: scatterlist support Currently the standard for device memory sharing is DMABUF, which doesn't generate struct pages. On the other hand, networking stack (skbs, drivers, and page pool) operate on pages. We have 2 options: 1. Generate struct pages for dmabuf device memory, or, 2. Modify the networking stack to process scatterlist. Approach #1 was attempted in RFC v1. RFC v2 implements approach #2. ** part 3: page pool support We piggy back on page pool memory providers proposal: https://github.com/kuba-moo/linux/tree/pp-providers It allows the page pool to define a memory provider that provides the page allocation and freeing. It helps abstract most of the device memory TCP changes from the driver. ** part 4: support for unreadable skb frags Page pool iovs are not accessible by the host; we implement changes throughput the networking stack to correctly handle skbs with unreadable frags. ** Part 5: recvmsg() APIs We define user APIs for the user to send and receive device memory. Not included with this series is the GVE devmem TCP support, just to simplify the review. Code available here if desired: https://github.com/mina/linux/tree/tcpdevmem This series is built on top of net-next with Jakub's pp-providers changes cherry-picked. * NIC dependencies: 1. (strict) Devmem TCP require the NIC to support header split, i.e. the capability to split incoming packets into a header + payload and to put each into a separate buffer. Devmem TCP works by using device memory for the packet payload, and host memory for the packet headers. 2. (optional) Devmem TCP works better with flow steering support & RSS support, i.e. the NIC's ability to steer flows into certain rx queues. This allows the sysadmin to enable devmem TCP on a subset of the rx queues, and steer devmem TCP traffic onto these queues and non devmem TCP elsewhere. The NIC I have access to with these properties is the GVE with DQO support running in Google Cloud, but any NIC that supports these features would suffice. I may be able to help reviewers bring up devmem TCP on their NICs. * Testing: The series includes a udmabuf kselftest that show a simple use case of devmem TCP and validates the entire data path end to end without a dependency on a specific dmabuf provider. ** Test Setup Kernel: net-next with this series and memory provider API cherry-picked locally. Hardware: Google Cloud A3 VMs. NIC: GVE with header split & RSS & flow steering support. Cc: Pavel Begunkov <asml.silence(a)gmail.com> Cc: David Wei <dw(a)davidwei.uk> Cc: Jason Gunthorpe <jgg(a)ziepe.ca> Cc: Yunsheng Lin <linyunsheng(a)huawei.com> Cc: Shailend Chand <shailend(a)google.com> Cc: Harshitha Ramamurthy <hramamurthy(a)google.com> Cc: Shakeel Butt <shakeel.butt(a)linux.dev> Cc: Jeroen de Borst <jeroendb(a)google.com> Cc: Praveen Kaligineedi <pkaligineedi(a)google.com> Mina Almasry (13): netdev: add netdev_rx_queue_restart() net: netdev netlink api to bind dma-buf to a net device netdev: support binding dma-buf to netdevice netdev: netdevice devmem allocator page_pool: devmem support memory-provider: dmabuf devmem memory provider net: support non paged skb frags net: add support for skbs with unreadable frags tcp: RX path for devmem TCP net: add SO_DEVMEM_DONTNEED setsockopt to release RX frags net: add devmem TCP documentation selftests: add ncdevmem, netcat for devmem TCP netdev: add dmabuf introspection Documentation/netlink/specs/netdev.yaml | 61 +++ Documentation/networking/devmem.rst | 269 +++++++++++ Documentation/networking/index.rst | 1 + arch/alpha/include/uapi/asm/socket.h | 6 + arch/mips/include/uapi/asm/socket.h | 6 + arch/parisc/include/uapi/asm/socket.h | 6 + arch/sparc/include/uapi/asm/socket.h | 6 + include/linux/netdevice.h | 2 + include/linux/skbuff.h | 61 ++- include/linux/skbuff_ref.h | 9 +- include/linux/socket.h | 1 + include/net/devmem.h | 128 ++++++ include/net/mp_dmabuf_devmem.h | 44 ++ include/net/netdev_rx_queue.h | 5 + include/net/netmem.h | 169 ++++++- include/net/page_pool/helpers.h | 39 +- include/net/page_pool/types.h | 22 +- include/net/sock.h | 2 + include/net/tcp.h | 5 +- include/trace/events/page_pool.h | 12 +- include/uapi/asm-generic/socket.h | 6 + include/uapi/linux/netdev.h | 13 + include/uapi/linux/uio.h | 17 + net/core/Makefile | 3 +- net/core/datagram.c | 6 + net/core/dev.c | 22 +- net/core/devmem.c | 374 +++++++++++++++ net/core/gro.c | 3 +- net/core/netdev-genl-gen.c | 23 + net/core/netdev-genl-gen.h | 6 + net/core/netdev-genl.c | 118 +++++ net/core/netdev_rx_queue.c | 81 ++++ net/core/netmem_priv.h | 31 ++ net/core/page_pool.c | 117 +++-- net/core/page_pool_priv.h | 46 ++ net/core/page_pool_user.c | 29 ++ net/core/skbuff.c | 77 +++- net/core/sock.c | 68 +++ net/ethtool/common.c | 8 + net/ipv4/esp4.c | 3 +- net/ipv4/tcp.c | 261 ++++++++++- net/ipv4/tcp_input.c | 13 +- net/ipv4/tcp_ipv4.c | 16 + net/ipv4/tcp_minisocks.c | 2 + net/ipv4/tcp_output.c | 5 +- net/ipv6/esp6.c | 3 +- net/packet/af_packet.c | 4 +- tools/include/uapi/linux/netdev.h | 13 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 9 + tools/testing/selftests/net/ncdevmem.c | 588 ++++++++++++++++++++++++ 51 files changed, 2699 insertions(+), 121 deletions(-) create mode 100644 Documentation/networking/devmem.rst create mode 100644 include/net/devmem.h create mode 100644 include/net/mp_dmabuf_devmem.h create mode 100644 net/core/devmem.c create mode 100644 net/core/netdev_rx_queue.c create mode 100644 net/core/netmem_priv.h create mode 100644 tools/testing/selftests/net/ncdevmem.c -- 2.46.0.184.g6999bdac58-goog

1 year, 3 months

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Re: [PATCH v3 1/3] riscv: mm: Use hint address in mmap if available

by Charlie Jenkins

On Tue, Aug 20, 2024 at 09:48:50AM +0800, Levi Zim wrote: > On 2024-08-20 01:00, Charlie Jenkins wrote: > > On Mon, Aug 19, 2024 at 01:55:57PM +0800, Levi Zim wrote: > > > On 2024-03-22 22:06, Palmer Dabbelt wrote: > > > > On Thu, 01 Feb 2024 18:28:06 PST (-0800), Charlie Jenkins wrote: > > > > > On Wed, Jan 31, 2024 at 11:59:43PM +0800, Yangyu Chen wrote: > > > > > > On Wed, 2024-01-31 at 22:41 +0800, Yangyu Chen wrote: > > > > > > > On Tue, 2024-01-30 at 17:07 -0800, Charlie Jenkins wrote: > > > > > > > > On riscv it is guaranteed that the address returned by mmap is less > > > > > > > > than > > > > > > > > the hint address. Allow mmap to return an address all the way up to > > > > > > > > addr, if provided, rather than just up to the lower address space. > > > > > > > > > > This provides a performance benefit as well, allowing > > > > > > mmap to exit > > > > > > > > after > > > > > > > > checking that the address is in range rather than searching for a > > > > > > > > valid > > > > > > > > address. > > > > > > > > > > It is possible to provide an address that uses at most the same > > > > > > > > number > > > > > > > > of bits, however it is significantly more computationally expensive > > > > > > > > to > > > > > > > > provide that number rather than setting the max to be the hint > > > > > > > > address. > > > > > > > > There is the instruction clz/clzw in Zbb that returns the highest > > > > > > > > set > > > > > > > > bit > > > > > > > > which could be used to performantly implement this, but it would > > > > > > > > still > > > > > > > > be slower than the current implementation. At worst case, half of > > > > > > > > the > > > > > > > > address would not be able to be allocated when a hint address is > > > > > > > > provided. > > > > > > > > > > Signed-off-by: Charlie Jenkins<charlie(a)rivosinc.com> > > > > > > > > --- > > > > > > > > arch/riscv/include/asm/processor.h | 27 +++++++++++--------------- > > > > > > > > - > > > > > > > > 1 file changed, 11 insertions(+), 16 deletions(-) > > > > > > > > > > diff --git a/arch/riscv/include/asm/processor.h > > > > > > > > b/arch/riscv/include/asm/processor.h > > > > > > > > index f19f861cda54..8ece7a8f0e18 100644 > > > > > > > > --- a/arch/riscv/include/asm/processor.h > > > > > > > > +++ b/arch/riscv/include/asm/processor.h > > > > > > > > @@ -14,22 +14,16 @@ > > > > > > > > > > > > > > > > #include <asm/ptrace.h> > > > > > > > > > > > > > > > > -#ifdef CONFIG_64BIT > > > > > > > > -#define DEFAULT_MAP_WINDOW (UL(1) << (MMAP_VA_BITS - 1)) > > > > > > > > -#define STACK_TOP_MAX TASK_SIZE_64 > > > > > > > > - > > > > > > > > #define arch_get_mmap_end(addr, len, flags) \ > > > > > > > > ({ \ > > > > > > > > unsigned long > > > > > > > > mmap_end; \ > > > > > > > > typeof(addr) _addr = (addr); \ > > > > > > > > - if ((_addr) == 0 || (IS_ENABLED(CONFIG_COMPAT) && > > > > > > > > is_compat_task())) \ > > > > > > > > + if ((_addr) == 0 || \ > > > > > > > > + (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) || \ > > > > > > > > + ((_addr + len) > BIT(VA_BITS - > > > > > > > > 1))) \ > > > > > > > > mmap_end = STACK_TOP_MAX; \ > > > > > > > > - else if ((_addr) >= VA_USER_SV57) \ > > > > > > > > - mmap_end = STACK_TOP_MAX; \ > > > > > > > > - else if ((((_addr) >= VA_USER_SV48)) && (VA_BITS >= > > > > > > > > VA_BITS_SV48)) \ > > > > > > > > - mmap_end = VA_USER_SV48; \ > > > > > > > > else \ > > > > > > > > - mmap_end = VA_USER_SV39; \ > > > > > > > > + mmap_end = (_addr + len); \ > > > > > > > > mmap_end; \ > > > > > > > > }) > > > > > > > > > > > > > > > > @@ -39,17 +33,18 @@ > > > > > > > > typeof(addr) _addr = (addr); \ > > > > > > > > typeof(base) _base = (base); \ > > > > > > > > unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base); \ > > > > > > > > - if ((_addr) == 0 || (IS_ENABLED(CONFIG_COMPAT) && > > > > > > > > is_compat_task())) \ > > > > > > > > + if ((_addr) == 0 || \ > > > > > > > > + (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) || \ > > > > > > > > + ((_addr + len) > BIT(VA_BITS - > > > > > > > > 1))) \ > > > > > > > > mmap_base = (_base); \ > > > > > > > > - else if (((_addr) >= VA_USER_SV57) && (VA_BITS >= > > > > > > > > VA_BITS_SV57)) \ > > > > > > > > - mmap_base = VA_USER_SV57 - rnd_gap; \ > > > > > > > > - else if ((((_addr) >= VA_USER_SV48)) && (VA_BITS >= > > > > > > > > VA_BITS_SV48)) \ > > > > > > > > - mmap_base = VA_USER_SV48 - rnd_gap; \ > > > > > > > > else \ > > > > > > > > - mmap_base = VA_USER_SV39 - rnd_gap; \ > > > > > > > > + mmap_base = (_addr + len) - rnd_gap; \ > > > > > > > > mmap_base; \ > > > > > > > > }) > > > > > > > > > > > > > > > > +#ifdef CONFIG_64BIT > > > > > > > > +#define DEFAULT_MAP_WINDOW (UL(1) << (MMAP_VA_BITS - 1)) > > > > > > > > +#define STACK_TOP_MAX TASK_SIZE_64 > > > > > > > > #else > > > > > > > > #define DEFAULT_MAP_WINDOW TASK_SIZE > > > > > > > > #define STACK_TOP_MAX TASK_SIZE > > > > > > > > > > I have carefully tested your patch on qemu with sv57. A > > > > > > bug that > > > > > > > needs > > > > > > > to be solved is that mmap with the same hint address without > > > > > > > MAP_FIXED > > > > > > > set will fail the second time. > > > > > > > > Userspace code to reproduce the bug: > > > > > > > > #include <sys/mman.h> > > > > > > > #include <stdio.h> > > > > > > > #include <stdint.h> > > > > > > > > void test(char *addr) { > > > > > > > char *res = mmap(addr, 4096, PROT_READ | PROT_WRITE, > > > > > > > MAP_ANONYMOUS > > > > > > > > MAP_PRIVATE, -1, 0); > > > > > > > printf("hint %p got %p.\n", addr, res); > > > > > > > } > > > > > > > > int main (void) { > > > > > > > test(1<<30); > > > > > > > test(1<<30); > > > > > > > test(1<<30); > > > > > > > return 0; > > > > > > > } > > > > > > > > output: > > > > > > > > hint 0x40000000 got 0x40000000. > > > > > > > hint 0x40000000 got 0xffffffffffffffff. > > > > > > > hint 0x40000000 got 0xffffffffffffffff. > > > > > > > > output on x86: > > > > > > > > hint 0x40000000 got 0x40000000. > > > > > > > hint 0x40000000 got 0x7f9171363000. > > > > > > > hint 0x40000000 got 0x7f9171362000. > > > > > > > > It may need to implement a special arch_get_unmapped_area and > > > > > > > arch_get_unmapped_area_topdown function. > > > > > > > > > > > > > This is because hint address < rnd_gap. I have tried to let mmap_base = > > > > > > min((_addr + len), (base) + TASK_SIZE - DEFAULT_MAP_WINDOW). However it > > > > > > does not work for bottom-up while ulimit -s is unlimited. You said this > > > > > > behavior is expected from patch v2 review. However it brings a new > > > > > > regression even on sv39 systems. > > > > > > > > > > > > I still don't know the reason why use addr+len as the upper-bound. I > > > > > > think solution like x86/arm64/powerpc provide two address space switch > > > > > > based on whether hint address above the default map window is enough. > > > > > > > > > > > Yep this is expected. It is up to the maintainers to decide. > > > > Sorry I forgot to reply to this, I had a buffer sitting around somewhere > > > > but I must have lost it. > > > > > > > > I think Charlie's approach is the right way to go. Putting my userspace > > > > hat on, I'd much rather have my allocations fail rather than silently > > > > ignore the hint when there's memory pressure. > > > > > > > > If there's some real use case that needs these low hints to be silently > > > > ignored under VA pressure then we can try and figure something out that > > > > makes those applications work. > > > I could confirm that this patch has broken chromium's partition allocator on > > > riscv64. The minimal reproduction I use is chromium-mmap.c: > > > > > > #include <stdio.h> > > > #include <sys/mman.h> > > > > > > int main() { > > > void* expected = (void*)0x400000000; > > > void* addr = mmap(expected, 17179869184, PROT_NONE, > > > MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); > > > if (addr != expected) { > > It is not valid to assume that the address returned by mmap will be the > > hint address. If the hint address is not available, mmap will return a > > different address. > > Oh, sorry I didn't make it clear what is the expected behavior. > The printf here is solely for debugging purpose and I don't mean that > chromium expect it will get the hint address. The expected behavior is that > both the two mmap calls will succeed. > > > > printf("Not expected address: %p != %p\n", addr, expected); > > > } > > > expected = (void*)0x3fffff000; > > > addr = mmap(expected, 17179873280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, > > > -1, 0); > > > if (addr != expected) { > > > printf("Not expected address: %p != %p\n", addr, expected); > > > } > > > return 0; > > > } > > > > > > The second mmap fails with ENOMEM. Manually reverting this commit fixes the > > > issue for me. So I think it's clearly a regression and breaks userspace. > > > > > The issue here is that overlapping memory is being requested. This > > second mmap will never be able to provide an address at 0x3fffff000 with > > a size of 0x400001000 since mmap just provided an address at 0x400000000 > > with a size of 0x400000000. > > > > Before this patch, this request causes mmap to return a completely > > arbitrary value. There is no reason to use a hint address in this manner > > because the hint can never be respected. Since an arbitrary address is > > desired, a hint of zero should be used. > > > > This patch causes the behavior to be more deterministic. Instead of > > providing an arbitrary address, it causes the address to be less than or > > equal to the hint address. This allows for applications to make > > assumptions about the returned address. > > About the overlap, of course the partition allocator's request for > overlapped vma seems unreasonable. > > But I still don't quite understand why mmap cannot use an address higher > than the hint address. > The hint address, after all, is a hint, not a requirement. Yes that is fair. A "hint" that does not guarantee anything is useless so architectures have abused the term quite a bit. > > Quoting the man page: > > > If another mapping already exists there, the kernel picks > > a new address that may or may not depend on the hint. The > > address of the new mapping is returned as the result of the call. > So for casual programmers that only reads man page but not architecture > specific kernel > documentation, the current behavior of mmap on riscv64 failing on overlapped > address ranges > are quite surprising IMO. The man pages for riscv are in desperate need of attention. I have submitted a couple of updates to them recently, but there is a lot more work to be done to help developers. > > And quoting the man page again about the errno: > > > ENOMEM No memory is available. > > > > ENOMEM The process's maximum number of mappings would have been > > exceeded. This error can also occur for munmap(), when > > unmapping a region in the middle of an existing mapping, > > since this results in two smaller mappings on either side > > of the region being unmapped. > > > > ENOMEM (since Linux 4.7) The process's RLIMIT_DATA limit, > > described in getrlimit(2), would have been exceeded. > > > > ENOMEM We don't like addr, because it exceeds the virtual address > > space of the CPU. > > > > There's no matching description for the ENOMEM returned here. > I would suggest removing "because it exceeds the virtual address > space of the CPU." from the last item if the ENOMEM behavior here > is expected. This ENOMEM means something like "no memory available in the requested region". > > > This code is unfortunately relying on the previously mostly undefined > > behavior of the hint address in mmap. > Although I haven't read the code of chromium's partition allocator to judge > whether it should > be improved or fixed for riscv64, I do know that the kernel "don't break > userspace" and > "never EVER blame the user programs". The hint address design of mmap is a tricky one because it is largely implementation defined and what the man pages say is not how it is implemented in most architectures! > > The goal of this patch is to help > > developers have more consistent mmap behavior, but maybe it is necessary > > to hide this behavior behind an mmap flag. > Thank you for helping to shape a more consistent mmap behavior. > I think this should be fixed ASAP either by allowing the hint address to be > ignored > (as suggested by the Linux man page), or hide this behavior behind an mmap > flag as you said. Having a flag could also lead to a generic way of defining this behavior. Other architectures do not provide a way for applications to guarantee that some number of bits are left unused in a virtual address, and that was one of the motivating design goals here. - Charlie > > > - Charlie > > > > > See alsohttps://github.com/riscv-forks/electron/issues/4 > > > > > > > > - Charlie > > > Sincerely, > > > Levi > > >

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