- Linux-kselftest-mirror - lists.linaro.org

[PATCH] Fix linked-list KUnit test when run multiple times

by David Gow

A few of the lists used in the linked-list KUnit tests (the for_each_entry{,_reverse} tests) are declared 'static', and so are not-reinitialised if the test runs multiple times. This was not a problem when KUnit tests were run once on startup, but when tests are able to be run manually (e.g. from debugfs[1]), this is no longer the case. Making these lists no longer 'static' causes the lists to be reinitialised, and the test passes each time it is run. While there may be some value in testing that initialising static lists works, the for_each_entry_* tests are unlikely to be the right place for it. Signed-off-by: David Gow <davidgow(a)google.com> --- lib/list-test.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/list-test.c b/lib/list-test.c index 76babb1df889..ee09505df16f 100644 --- a/lib/list-test.c +++ b/lib/list-test.c @@ -659,7 +659,7 @@ static void list_test_list_for_each_prev_safe(struct kunit *test) static void list_test_list_for_each_entry(struct kunit *test) { struct list_test_struct entries[5], *cur; - static LIST_HEAD(list); + LIST_HEAD(list); int i = 0; for (i = 0; i < 5; ++i) { @@ -680,7 +680,7 @@ static void list_test_list_for_each_entry(struct kunit *test) static void list_test_list_for_each_entry_reverse(struct kunit *test) { struct list_test_struct entries[5], *cur; - static LIST_HEAD(list); + LIST_HEAD(list); int i = 0; for (i = 0; i < 5; ++i) { -- 2.25.0.341.g760bfbb309-goog

5 years, 5 months

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[PATCH bpf-next] bpf: add bpf_ct_lookup_{tcp,udp}() helpers

by Matthew Cover

Allow looking up an nf_conn. This allows eBPF programs to leverage nf_conntrack state for similar purposes to socket state use cases, as provided by the socket lookup helpers. This is particularly useful when nf_conntrack state is locally available, but socket state is not. Signed-off-by: Matthew Cover <matthew.cover(a)stackpath.com> --- include/linux/bpf.h | 28 +++ include/uapi/linux/bpf.h | 111 ++++++++- kernel/bpf/verifier.c | 105 +++++++- net/core/filter.c | 277 +++++++++++++++++++++ scripts/bpf_helpers_doc.py | 4 + tools/include/uapi/linux/bpf.h | 111 ++++++++- tools/testing/selftests/bpf/test_verifier.c | 18 ++ .../testing/selftests/bpf/verifier/ref_tracking.c | 48 ++++ 8 files changed, 694 insertions(+), 8 deletions(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 8e3b8f4..28d35c3 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -239,6 +239,7 @@ enum bpf_arg_type { ARG_PTR_TO_LONG, /* pointer to long */ ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ + ARG_PTR_TO_NF_CONN, /* pointer to bpf_nf_conn */ }; /* type of values returned from helper functions */ @@ -250,6 +251,7 @@ enum bpf_return_type { RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */ + RET_PTR_TO_NF_CONN_OR_NULL, /* returns a pointer to a nf_conn or NULL */ }; /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs @@ -316,6 +318,8 @@ enum bpf_reg_type { PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ PTR_TO_BTF_ID, /* reg points to kernel struct */ + PTR_TO_NF_CONN, /* reg points to struct nf_conn */ + PTR_TO_NF_CONN_OR_NULL, /* reg points to struct nf_conn or NULL */ }; /* The information passed from prog-specific *_is_valid_access @@ -1513,4 +1517,28 @@ enum bpf_text_poke_type { int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, void *addr1, void *addr2); +#if IS_BUILTIN(CONFIG_NF_CONNTRACK) +bool bpf_nf_conn_is_valid_access(int off, int size, enum bpf_access_type type, + struct bpf_insn_access_aux *info); + +u32 bpf_nf_conn_convert_ctx_access(enum bpf_access_type type, + const struct bpf_insn *si, + struct bpf_insn *insn_buf, + struct bpf_prog *prog, u32 *target_size); +#else +bool bpf_nf_conn_is_valid_access(int off, int size, enum bpf_access_type type, + struct bpf_insn_access_aux *info) +{ + return false; +} + +u32 bpf_nf_conn_convert_ctx_access(enum bpf_access_type type, + const struct bpf_insn *si, + struct bpf_insn *insn_buf, + struct bpf_prog *prog, u32 *target_size) +{ + return 0; +} +#endif /* CONFIG_NF_CONNTRACK */ + #endif /* _LINUX_BPF_H */ diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 033d90a..12e16ad 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -2885,6 +2885,88 @@ struct bpf_stack_build_id { * **-EPERM** if no permission to send the *sig*. * * **-EAGAIN** if bpf program can try again. + * + * struct bpf_nf_conn *bpf_ct_lookup_tcp(void *ctx, struct bpf_nf_conntrack_tuple *tuple, u32 tuple_size, u64 netns, u64 flags) + * Description + * Look for TCP nf_conntrack entry matching *tuple*, optionally in + * a child network namespace *netns*. The return value must be + * checked, and if non-**NULL**, released via + * **bpf_ct_release**\ (). + * + * The *ctx* should point to the context of the program, such as + * the skb or xdp_md (depending on the hook in use). This is used + * to determine the base network namespace for the lookup. + * + * *tuple_size* must be one of: + * + * **sizeof**\ (*tuple*\ **->ipv4**) + * Look for an IPv4 nf_conn. + * **sizeof**\ (*tuple*\ **->ipv6**) + * Look for an IPv6 nf_conn. + * + * If the *netns* is a negative signed 32-bit integer, then the + * nf_conn lookup table in the netns associated with the *ctx* will + * will be used. For the TC hooks, this is the netns of the device + * in the skb. For XDP hooks, this is the netns of the device in + * the xdp_md. If *netns* is any other signed 32-bit value greater + * than or equal to zero then it specifies the ID of the netns + * relative to the netns associated with the *ctx*. *netns* values + * beyond the range of 32-bit integers are reserved for future + * use. + * + * All values for *flags* are reserved for future usage, and must + * be left at zero. + * + * This helper is available only if the kernel was compiled with + * **CONFIG_NF_CONNTRACK=y** configuration option. + * Return + * Pointer to **struct bpf_nf_conn**, or **NULL** in case of + * failure. + * + * struct bpf_nf_conn *bpf_ct_lookup_udp(void *ctx, struct bpf_nf_conntrack_tuple *tuple, u32 tuple_size, u64 netns, u64 flags) + * Description + * Look for UDP nf_conntrack entry matching *tuple*, optionally in + * a child network namespace *netns*. The return value must be + * checked, and if non-**NULL**, released via + * **bpf_ct_release**\ (). + * + * The *ctx* should point to the context of the program, such as + * the skb or xdp_md (depending on the hook in use). This is used + * to determine the base network namespace for the lookup. + * + * *tuple_size* must be one of: + * + * **sizeof**\ (*tuple*\ **->ipv4**) + * Look for an IPv4 nf_conn. + * **sizeof**\ (*tuple*\ **->ipv6**) + * Look for an IPv6 nf_conn. + * + * If the *netns* is a negative signed 32-bit integer, then the + * nf_conn lookup table in the netns associated with the *ctx* will + * will be used. For the TC hooks, this is the netns of the device + * in the skb. For XDP hooks, this is the netns of the device in + * the xdp_md. If *netns* is any other signed 32-bit value greater + * than or equal to zero then it specifies the ID of the netns + * relative to the netns associated with the *ctx*. *netns* values + * beyond the range of 32-bit integers are reserved for future + * use. + * + * All values for *flags* are reserved for future usage, and must + * be left at zero. + * + * This helper is available only if the kernel was compiled with + * **CONFIG_NF_CONNTRACK=y** configuration option. + * Return + * Pointer to **struct bpf_nf_conn**, or **NULL** in case of + * failure. + * + * int bpf_ct_release(struct bpf_nf_conn *ct) + * Description + * Release the reference held by *ct*. *ct* must be a + * non-**NULL** pointer that was returned from + * **bpf_ct_lookup_xxx**\ (). + * Return + * 0 on success, or a negative error in case of failure. */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -3004,7 +3086,10 @@ struct bpf_stack_build_id { FN(probe_read_user_str), \ FN(probe_read_kernel_str), \ FN(tcp_send_ack), \ - FN(send_signal_thread), + FN(send_signal_thread), \ + FN(ct_lookup_tcp), \ + FN(ct_lookup_udp), \ + FN(ct_release), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call @@ -3278,6 +3363,30 @@ struct bpf_sock_tuple { }; }; +struct bpf_nf_conn { + __u32 cpu; + __u32 mark; + __u32 status; + __u32 timeout; +}; + +struct bpf_nf_conntrack_tuple { + union { + struct { + __be32 saddr; + __be32 daddr; + __be16 sport; + __be16 dport; + } ipv4; + struct { + __be32 saddr[4]; + __be32 daddr[4]; + __be16 sport; + __be16 dport; + } ipv6; + }; +}; + struct bpf_xdp_sock { __u32 queue_id; }; diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index ca17dccc..0ea0ee7 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -362,6 +362,11 @@ static const char *ltrim(const char *s) env->prev_linfo = linfo; } +static bool type_is_nf_ct_pointer(enum bpf_reg_type type) +{ + return type == PTR_TO_NF_CONN; +} + static bool type_is_pkt_pointer(enum bpf_reg_type type) { return type == PTR_TO_PACKET || @@ -381,7 +386,8 @@ static bool reg_type_may_be_null(enum bpf_reg_type type) return type == PTR_TO_MAP_VALUE_OR_NULL || type == PTR_TO_SOCKET_OR_NULL || type == PTR_TO_SOCK_COMMON_OR_NULL || - type == PTR_TO_TCP_SOCK_OR_NULL; + type == PTR_TO_TCP_SOCK_OR_NULL || + type == PTR_TO_NF_CONN_OR_NULL; } static bool reg_may_point_to_spin_lock(const struct bpf_reg_state *reg) @@ -395,12 +401,15 @@ static bool reg_type_may_be_refcounted_or_null(enum bpf_reg_type type) return type == PTR_TO_SOCKET || type == PTR_TO_SOCKET_OR_NULL || type == PTR_TO_TCP_SOCK || - type == PTR_TO_TCP_SOCK_OR_NULL; + type == PTR_TO_TCP_SOCK_OR_NULL || + type == PTR_TO_NF_CONN || + type == PTR_TO_NF_CONN_OR_NULL; } static bool arg_type_may_be_refcounted(enum bpf_arg_type type) { - return type == ARG_PTR_TO_SOCK_COMMON; + return type == ARG_PTR_TO_SOCK_COMMON || + type == ARG_PTR_TO_NF_CONN; } /* Determine whether the function releases some resources allocated by another @@ -409,14 +418,17 @@ static bool arg_type_may_be_refcounted(enum bpf_arg_type type) */ static bool is_release_function(enum bpf_func_id func_id) { - return func_id == BPF_FUNC_sk_release; + return func_id == BPF_FUNC_sk_release || + func_id == BPF_FUNC_ct_release; } static bool is_acquire_function(enum bpf_func_id func_id) { return func_id == BPF_FUNC_sk_lookup_tcp || func_id == BPF_FUNC_sk_lookup_udp || - func_id == BPF_FUNC_skc_lookup_tcp; + func_id == BPF_FUNC_skc_lookup_tcp || + func_id == BPF_FUNC_ct_lookup_tcp || + func_id == BPF_FUNC_ct_lookup_udp; } static bool is_ptr_cast_function(enum bpf_func_id func_id) @@ -447,6 +459,8 @@ static bool is_ptr_cast_function(enum bpf_func_id func_id) [PTR_TO_TP_BUFFER] = "tp_buffer", [PTR_TO_XDP_SOCK] = "xdp_sock", [PTR_TO_BTF_ID] = "ptr_", + [PTR_TO_NF_CONN] = "nf_conn", + [PTR_TO_NF_CONN_OR_NULL] = "nf_conn_or_null", }; static char slot_type_char[] = { @@ -1913,6 +1927,8 @@ static bool is_spillable_regtype(enum bpf_reg_type type) case PTR_TO_TCP_SOCK_OR_NULL: case PTR_TO_XDP_SOCK: case PTR_TO_BTF_ID: + case PTR_TO_NF_CONN: + case PTR_TO_NF_CONN_OR_NULL: return true; default: return false; @@ -2440,6 +2456,35 @@ static int check_flow_keys_access(struct bpf_verifier_env *env, int off, return 0; } +static int check_nf_ct_access(struct bpf_verifier_env *env, int insn_idx, + u32 regno, int off, int size, + enum bpf_access_type t) +{ + struct bpf_reg_state *regs = cur_regs(env); + struct bpf_reg_state *reg = &regs[regno]; + struct bpf_insn_access_aux info = {}; + bool valid; + + switch (reg->type) { + case PTR_TO_NF_CONN: + valid = bpf_nf_conn_is_valid_access(off, size, t, &info); + break; + default: + valid = false; + } + + if (valid) { + env->insn_aux_data[insn_idx].ctx_field_size = + info.ctx_field_size; + return 0; + } + + verbose(env, "R%d invalid %s access off=%d size=%d\n", + regno, reg_type_str[reg->type], off, size); + + return -EACCES; +} + static int check_sock_access(struct bpf_verifier_env *env, int insn_idx, u32 regno, int off, int size, enum bpf_access_type t) @@ -2511,6 +2556,13 @@ static bool is_ctx_reg(struct bpf_verifier_env *env, int regno) return reg->type == PTR_TO_CTX; } +static bool is_nf_ct_reg(struct bpf_verifier_env *env, int regno) +{ + const struct bpf_reg_state *reg = reg_state(env, regno); + + return type_is_nf_ct_pointer(reg->type); +} + static bool is_sk_reg(struct bpf_verifier_env *env, int regno) { const struct bpf_reg_state *reg = reg_state(env, regno); @@ -2635,6 +2687,9 @@ static int check_ptr_alignment(struct bpf_verifier_env *env, case PTR_TO_XDP_SOCK: pointer_desc = "xdp_sock "; break; + case PTR_TO_NF_CONN: + pointer_desc = "nf_conn "; + break; default: break; } @@ -3050,6 +3105,15 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn err = check_sock_access(env, insn_idx, regno, off, size, t); if (!err && value_regno >= 0) mark_reg_unknown(env, regs, value_regno); + } else if (type_is_nf_ct_pointer(reg->type)) { + if (t == BPF_WRITE) { + verbose(env, "R%d cannot write into %s\n", + regno, reg_type_str[reg->type]); + return -EACCES; + } + err = check_nf_ct_access(env, insn_idx, regno, off, size, t); + if (!err && value_regno >= 0) + mark_reg_unknown(env, regs, value_regno); } else if (reg->type == PTR_TO_TP_BUFFER) { err = check_tp_buffer_access(env, reg, regno, off, size); if (!err && t == BPF_READ && value_regno >= 0) @@ -3099,7 +3163,8 @@ static int check_xadd(struct bpf_verifier_env *env, int insn_idx, struct bpf_ins if (is_ctx_reg(env, insn->dst_reg) || is_pkt_reg(env, insn->dst_reg) || is_flow_key_reg(env, insn->dst_reg) || - is_sk_reg(env, insn->dst_reg)) { + is_sk_reg(env, insn->dst_reg) || + is_nf_ct_reg(env, insn->dst_reg)) { verbose(env, "BPF_XADD stores into R%d %s is not allowed\n", insn->dst_reg, reg_type_str[reg_state(env, insn->dst_reg)->type]); @@ -3501,6 +3566,19 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno, regno); return -EACCES; } + } else if (arg_type == ARG_PTR_TO_NF_CONN) { + expected_type = PTR_TO_NF_CONN; + if (!type_is_nf_ct_pointer(type)) + goto err_type; + if (reg->ref_obj_id) { + if (meta->ref_obj_id) { + verbose(env, "verifier internal error: more than one arg with ref_obj_id R%d %u %u\n", + regno, reg->ref_obj_id, + meta->ref_obj_id); + return -EFAULT; + } + meta->ref_obj_id = reg->ref_obj_id; + } } else if (arg_type == ARG_PTR_TO_SPIN_LOCK) { if (meta->func_id == BPF_FUNC_spin_lock) { if (process_spin_lock(env, regno, true)) @@ -4368,6 +4446,10 @@ static int check_helper_call(struct bpf_verifier_env *env, int func_id, int insn mark_reg_known_zero(env, regs, BPF_REG_0); regs[BPF_REG_0].type = PTR_TO_TCP_SOCK_OR_NULL; regs[BPF_REG_0].id = ++env->id_gen; + } else if (fn->ret_type == RET_PTR_TO_NF_CONN_OR_NULL) { + mark_reg_known_zero(env, regs, BPF_REG_0); + regs[BPF_REG_0].type = PTR_TO_NF_CONN_OR_NULL; + regs[BPF_REG_0].id = ++env->id_gen; } else { verbose(env, "unknown return type %d of func %s#%d\n", fn->ret_type, func_id_name(func_id), func_id); @@ -4649,6 +4731,8 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env, case PTR_TO_TCP_SOCK: case PTR_TO_TCP_SOCK_OR_NULL: case PTR_TO_XDP_SOCK: + case PTR_TO_NF_CONN: + case PTR_TO_NF_CONN_OR_NULL: verbose(env, "R%d pointer arithmetic on %s prohibited\n", dst, reg_type_str[ptr_reg->type]); return -EACCES; @@ -5915,6 +5999,8 @@ static void mark_ptr_or_null_reg(struct bpf_func_state *state, reg->type = PTR_TO_SOCK_COMMON; } else if (reg->type == PTR_TO_TCP_SOCK_OR_NULL) { reg->type = PTR_TO_TCP_SOCK; + } else if (reg->type == PTR_TO_NF_CONN_OR_NULL) { + reg->type = PTR_TO_NF_CONN; } if (is_null) { /* We don't need id and ref_obj_id from this point @@ -7232,6 +7318,8 @@ static bool regsafe(struct bpf_reg_state *rold, struct bpf_reg_state *rcur, case PTR_TO_TCP_SOCK: case PTR_TO_TCP_SOCK_OR_NULL: case PTR_TO_XDP_SOCK: + case PTR_TO_NF_CONN: + case PTR_TO_NF_CONN_OR_NULL: /* Only valid matches are exact, which memcmp() above * would have accepted */ @@ -7760,6 +7848,8 @@ static bool reg_type_mismatch_ok(enum bpf_reg_type type) case PTR_TO_TCP_SOCK_OR_NULL: case PTR_TO_XDP_SOCK: case PTR_TO_BTF_ID: + case PTR_TO_NF_CONN: + case PTR_TO_NF_CONN_OR_NULL: return false; default: return true; @@ -8867,6 +8957,9 @@ static int convert_ctx_accesses(struct bpf_verifier_env *env) return -EINVAL; } continue; + case PTR_TO_NF_CONN: + convert_ctx_access = bpf_nf_conn_convert_ctx_access; + break; default: continue; } diff --git a/net/core/filter.c b/net/core/filter.c index 17de674..39ba965 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -74,6 +74,12 @@ #include <net/ipv6_stubs.h> #include <net/bpf_sk_storage.h> +#if IS_BUILTIN(CONFIG_NF_CONNTRACK) +#include <net/netfilter/nf_conntrack_tuple.h> +#include <net/netfilter/nf_conntrack_core.h> +#include <net/netfilter/nf_conntrack.h> +#endif + /** * sk_filter_trim_cap - run a packet through a socket filter * @sk: sock associated with &sk_buff @@ -5122,6 +5128,253 @@ static void bpf_update_srh_state(struct sk_buff *skb) }; #endif /* CONFIG_IPV6_SEG6_BPF */ +#if IS_BUILTIN(CONFIG_NF_CONNTRACK) +bool bpf_nf_conn_is_valid_access(int off, int size, enum bpf_access_type type, + struct bpf_insn_access_aux *info) +{ + if (off < 0 || off >= offsetofend(struct bpf_nf_conn, + timeout)) + return false; + + if (off % size != 0) + return false; + + return size == sizeof(__u32); +} + +u32 bpf_nf_conn_convert_ctx_access(enum bpf_access_type type, + const struct bpf_insn *si, + struct bpf_insn *insn_buf, + struct bpf_prog *prog, u32 *target_size) +{ + struct bpf_insn *insn = insn_buf; + + switch (si->off) { + case offsetof(struct bpf_nf_conn, cpu): + BUILD_BUG_ON(FIELD_SIZEOF(struct nf_conn, cpu) != 2); + + *insn++ = BPF_LDX_MEM(BPF_H, si->dst_reg, si->src_reg, + offsetof(struct nf_conn, cpu)); + + break; + + case offsetof(struct bpf_nf_conn, mark): +#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) + BUILD_BUG_ON(FIELD_SIZEOF(struct nf_conn, mark) != 4); + + *insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->src_reg, + offsetof(struct nf_conn, mark)); +#else + *target_size = 4; + *insn++ = BPF_MOV64_IMM(si->dst_reg, 0); +#endif + break; + + case offsetof(struct bpf_nf_conn, status): + BUILD_BUG_ON(FIELD_SIZEOF(struct nf_conn, status) < 4 || + __IPS_MAX_BIT > 32); + + *insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->src_reg, + offsetof(struct nf_conn, status)); + + break; + + case offsetof(struct bpf_nf_conn, timeout): + BUILD_BUG_ON(FIELD_SIZEOF(struct nf_conn, timeout) != 4); + + *insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->src_reg, + offsetof(struct nf_conn, timeout)); + + break; + } + + return insn - insn_buf; +} + +static struct nf_conn * +ct_lookup(struct net *net, struct bpf_nf_conntrack_tuple *tuple, + u8 family, u8 proto) +{ + struct nf_conntrack_tuple_hash *hash; + struct nf_conntrack_tuple tup; + struct nf_conn *ct = NULL; + + memset(&tup, 0, sizeof(tup)); + + tup.dst.protonum = proto; + tup.src.l3num = family; + + if (family == AF_INET) { + tup.src.u3.ip = tuple->ipv4.saddr; + tup.dst.u3.ip = tuple->ipv4.daddr; + tup.src.u.tcp.port = tuple->ipv4.sport; + tup.dst.u.tcp.port = tuple->ipv4.dport; +#if IS_ENABLED(CONFIG_IPV6) + } else { + memcpy(tup.src.u3.ip6, tuple->ipv6.saddr, sizeof(tup.src.u3.ip6)); + memcpy(tup.dst.u3.ip6, tuple->ipv6.daddr, sizeof(tup.dst.u3.ip6)); + tup.src.u.tcp.port = tuple->ipv6.sport; + tup.dst.u.tcp.port = tuple->ipv6.dport; +#endif + } + + hash = nf_conntrack_find_get(net, &nf_ct_zone_dflt, &tup); + if (!hash) + goto out; + ct = nf_ct_tuplehash_to_ctrack(hash); + +out: + return ct; +} + +static struct nf_conn * +__bpf_ct_lookup(struct sk_buff *skb, struct bpf_nf_conntrack_tuple *tuple, u32 len, + struct net *caller_net, u8 proto, u64 netns_id, u64 flags) +{ + struct nf_conn *ct = NULL; + u8 family = AF_UNSPEC; + struct net *net; + + if (len == sizeof(tuple->ipv4)) + family = AF_INET; + else if (len == sizeof(tuple->ipv6)) + family = AF_INET6; + else + goto out; + + if (unlikely(family == AF_UNSPEC || flags || + !((s32)netns_id < 0 || netns_id <= S32_MAX))) + goto out; + + if ((s32)netns_id < 0) { + net = caller_net; + ct = ct_lookup(net, tuple, family, proto); + } else { + net = get_net_ns_by_id(caller_net, netns_id); + if (unlikely(!net)) + goto out; + ct = ct_lookup(net, tuple, family, proto); + put_net(net); + } + +out: + return ct; +} + +static struct nf_conn * +bpf_ct_lookup(struct sk_buff *skb, struct bpf_nf_conntrack_tuple *tuple, u32 len, + u8 proto, u64 netns_id, u64 flags) +{ + struct net *caller_net; + + if (skb->dev) { + caller_net = dev_net(skb->dev); + } else { + caller_net = sock_net(skb->sk); + } + + return __bpf_ct_lookup(skb, tuple, len, caller_net, proto, + netns_id, flags); +} + +BPF_CALL_5(bpf_ct_lookup_tcp, struct sk_buff *, skb, + struct bpf_nf_conntrack_tuple *, tuple, u32, len, u64, netns_id, + u64, flags) +{ + return (unsigned long)bpf_ct_lookup(skb, tuple, len, IPPROTO_TCP, + netns_id, flags); +} + +static const struct bpf_func_proto bpf_ct_lookup_tcp_proto = { + .func = bpf_ct_lookup_tcp, + .gpl_only = true, + .pkt_access = true, + .ret_type = RET_PTR_TO_NF_CONN_OR_NULL, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_PTR_TO_MEM, + .arg3_type = ARG_CONST_SIZE, + .arg4_type = ARG_ANYTHING, + .arg5_type = ARG_ANYTHING, +}; + +BPF_CALL_5(bpf_xdp_ct_lookup_tcp, struct xdp_buff *, ctx, + struct bpf_nf_conntrack_tuple *, tuple, u32, len, u32, netns_id, + u64, flags) +{ + struct net *caller_net = dev_net(ctx->rxq->dev); + + return (unsigned long)__bpf_ct_lookup(NULL, tuple, len, caller_net, + IPPROTO_TCP, netns_id, flags); +} + +static const struct bpf_func_proto bpf_xdp_ct_lookup_tcp_proto = { + .func = bpf_xdp_ct_lookup_tcp, + .gpl_only = true, + .pkt_access = true, + .ret_type = RET_PTR_TO_NF_CONN_OR_NULL, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_PTR_TO_MEM, + .arg3_type = ARG_CONST_SIZE, + .arg4_type = ARG_ANYTHING, + .arg5_type = ARG_ANYTHING, +}; + +BPF_CALL_5(bpf_ct_lookup_udp, struct sk_buff *, skb, + struct bpf_nf_conntrack_tuple *, tuple, u32, len, u64, netns_id, + u64, flags) +{ + return (unsigned long)bpf_ct_lookup(skb, tuple, len, IPPROTO_UDP, + netns_id, flags); +} + +static const struct bpf_func_proto bpf_ct_lookup_udp_proto = { + .func = bpf_ct_lookup_udp, + .gpl_only = true, + .pkt_access = true, + .ret_type = RET_PTR_TO_NF_CONN_OR_NULL, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_PTR_TO_MEM, + .arg3_type = ARG_CONST_SIZE, + .arg4_type = ARG_ANYTHING, + .arg5_type = ARG_ANYTHING, +}; + +BPF_CALL_5(bpf_xdp_ct_lookup_udp, struct xdp_buff *, ctx, + struct bpf_nf_conntrack_tuple *, tuple, u32, len, u32, netns_id, + u64, flags) +{ + struct net *caller_net = dev_net(ctx->rxq->dev); + + return (unsigned long)__bpf_ct_lookup(NULL, tuple, len, caller_net, + IPPROTO_UDP, netns_id, flags); +} + +static const struct bpf_func_proto bpf_xdp_ct_lookup_udp_proto = { + .func = bpf_xdp_ct_lookup_udp, + .gpl_only = true, + .pkt_access = true, + .ret_type = RET_PTR_TO_NF_CONN_OR_NULL, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_PTR_TO_MEM, + .arg3_type = ARG_CONST_SIZE, + .arg4_type = ARG_ANYTHING, + .arg5_type = ARG_ANYTHING, +}; + +BPF_CALL_1(bpf_ct_release, struct nf_conn *, ct) +{ + nf_conntrack_put(&ct->ct_general); + return 0; +} + +static const struct bpf_func_proto bpf_ct_release_proto = { + .func = bpf_ct_release, + .gpl_only = true, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_NF_CONN, +}; +#endif + #ifdef CONFIG_INET static struct sock *sk_lookup(struct net *net, struct bpf_sock_tuple *tuple, int dif, int sdif, u8 family, u8 proto) @@ -6139,6 +6392,14 @@ bool bpf_helper_changes_pkt_data(void *func) case BPF_FUNC_tcp_gen_syncookie: return &bpf_tcp_gen_syncookie_proto; #endif +#if IS_BUILTIN(CONFIG_NF_CONNTRACK) + case BPF_FUNC_ct_lookup_tcp: + return &bpf_ct_lookup_tcp_proto; + case BPF_FUNC_ct_lookup_udp: + return &bpf_ct_lookup_udp_proto; + case BPF_FUNC_ct_release: + return &bpf_ct_release_proto; +#endif default: return bpf_base_func_proto(func_id); } @@ -6180,6 +6441,14 @@ bool bpf_helper_changes_pkt_data(void *func) case BPF_FUNC_tcp_gen_syncookie: return &bpf_tcp_gen_syncookie_proto; #endif +#if IS_BUILTIN(CONFIG_NF_CONNTRACK) + case BPF_FUNC_ct_lookup_tcp: + return &bpf_xdp_ct_lookup_tcp_proto; + case BPF_FUNC_ct_lookup_udp: + return &bpf_xdp_ct_lookup_udp_proto; + case BPF_FUNC_ct_release: + return &bpf_ct_release_proto; +#endif default: return bpf_base_func_proto(func_id); } @@ -6284,6 +6553,14 @@ bool bpf_helper_changes_pkt_data(void *func) case BPF_FUNC_skc_lookup_tcp: return &bpf_skc_lookup_tcp_proto; #endif +#if IS_BUILTIN(CONFIG_NF_CONNTRACK) + case BPF_FUNC_ct_lookup_tcp: + return &bpf_ct_lookup_tcp_proto; + case BPF_FUNC_ct_lookup_udp: + return &bpf_ct_lookup_udp_proto; + case BPF_FUNC_ct_release: + return &bpf_ct_release_proto; +#endif default: return bpf_base_func_proto(func_id); } diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py index 90baf7d..26f0c2a 100755 --- a/scripts/bpf_helpers_doc.py +++ b/scripts/bpf_helpers_doc.py @@ -398,6 +398,8 @@ class PrinterHelpers(Printer): type_fwds = [ 'struct bpf_fib_lookup', + 'struct bpf_nf_conn', + 'struct bpf_nf_conntrack_tuple', 'struct bpf_perf_event_data', 'struct bpf_perf_event_value', 'struct bpf_sock', @@ -433,6 +435,8 @@ class PrinterHelpers(Printer): '__wsum', 'struct bpf_fib_lookup', + 'struct bpf_nf_conn', + 'struct bpf_nf_conntrack_tuple', 'struct bpf_perf_event_data', 'struct bpf_perf_event_value', 'struct bpf_sock', diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 033d90a..12e16ad 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -2885,6 +2885,88 @@ struct bpf_stack_build_id { * **-EPERM** if no permission to send the *sig*. * * **-EAGAIN** if bpf program can try again. + * + * struct bpf_nf_conn *bpf_ct_lookup_tcp(void *ctx, struct bpf_nf_conntrack_tuple *tuple, u32 tuple_size, u64 netns, u64 flags) + * Description + * Look for TCP nf_conntrack entry matching *tuple*, optionally in + * a child network namespace *netns*. The return value must be + * checked, and if non-**NULL**, released via + * **bpf_ct_release**\ (). + * + * The *ctx* should point to the context of the program, such as + * the skb or xdp_md (depending on the hook in use). This is used + * to determine the base network namespace for the lookup. + * + * *tuple_size* must be one of: + * + * **sizeof**\ (*tuple*\ **->ipv4**) + * Look for an IPv4 nf_conn. + * **sizeof**\ (*tuple*\ **->ipv6**) + * Look for an IPv6 nf_conn. + * + * If the *netns* is a negative signed 32-bit integer, then the + * nf_conn lookup table in the netns associated with the *ctx* will + * will be used. For the TC hooks, this is the netns of the device + * in the skb. For XDP hooks, this is the netns of the device in + * the xdp_md. If *netns* is any other signed 32-bit value greater + * than or equal to zero then it specifies the ID of the netns + * relative to the netns associated with the *ctx*. *netns* values + * beyond the range of 32-bit integers are reserved for future + * use. + * + * All values for *flags* are reserved for future usage, and must + * be left at zero. + * + * This helper is available only if the kernel was compiled with + * **CONFIG_NF_CONNTRACK=y** configuration option. + * Return + * Pointer to **struct bpf_nf_conn**, or **NULL** in case of + * failure. + * + * struct bpf_nf_conn *bpf_ct_lookup_udp(void *ctx, struct bpf_nf_conntrack_tuple *tuple, u32 tuple_size, u64 netns, u64 flags) + * Description + * Look for UDP nf_conntrack entry matching *tuple*, optionally in + * a child network namespace *netns*. The return value must be + * checked, and if non-**NULL**, released via + * **bpf_ct_release**\ (). + * + * The *ctx* should point to the context of the program, such as + * the skb or xdp_md (depending on the hook in use). This is used + * to determine the base network namespace for the lookup. + * + * *tuple_size* must be one of: + * + * **sizeof**\ (*tuple*\ **->ipv4**) + * Look for an IPv4 nf_conn. + * **sizeof**\ (*tuple*\ **->ipv6**) + * Look for an IPv6 nf_conn. + * + * If the *netns* is a negative signed 32-bit integer, then the + * nf_conn lookup table in the netns associated with the *ctx* will + * will be used. For the TC hooks, this is the netns of the device + * in the skb. For XDP hooks, this is the netns of the device in + * the xdp_md. If *netns* is any other signed 32-bit value greater + * than or equal to zero then it specifies the ID of the netns + * relative to the netns associated with the *ctx*. *netns* values + * beyond the range of 32-bit integers are reserved for future + * use. + * + * All values for *flags* are reserved for future usage, and must + * be left at zero. + * + * This helper is available only if the kernel was compiled with + * **CONFIG_NF_CONNTRACK=y** configuration option. + * Return + * Pointer to **struct bpf_nf_conn**, or **NULL** in case of + * failure. + * + * int bpf_ct_release(struct bpf_nf_conn *ct) + * Description + * Release the reference held by *ct*. *ct* must be a + * non-**NULL** pointer that was returned from + * **bpf_ct_lookup_xxx**\ (). + * Return + * 0 on success, or a negative error in case of failure. */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -3004,7 +3086,10 @@ struct bpf_stack_build_id { FN(probe_read_user_str), \ FN(probe_read_kernel_str), \ FN(tcp_send_ack), \ - FN(send_signal_thread), + FN(send_signal_thread), \ + FN(ct_lookup_tcp), \ + FN(ct_lookup_udp), \ + FN(ct_release), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call @@ -3278,6 +3363,30 @@ struct bpf_sock_tuple { }; }; +struct bpf_nf_conn { + __u32 cpu; + __u32 mark; + __u32 status; + __u32 timeout; +}; + +struct bpf_nf_conntrack_tuple { + union { + struct { + __be32 saddr; + __be32 daddr; + __be16 sport; + __be16 dport; + } ipv4; + struct { + __be32 saddr[4]; + __be32 daddr[4]; + __be16 sport; + __be16 dport; + } ipv6; + }; +}; + struct bpf_xdp_sock { __u32 queue_id; }; diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 87eaa49..7569db2 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -294,6 +294,24 @@ static void bpf_fill_scale(struct bpf_test *self) } } +/* BPF_CT_LOOKUP contains 13 instructions, if you need to fix up maps */ +#define BPF_CT_LOOKUP(func) \ + /* struct bpf_nf_conntrack_tuple tuple = {} */ \ + BPF_MOV64_IMM(BPF_REG_2, 0), \ + BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_2, -8), \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -16), \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -24), \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -32), \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -40), \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -48), \ + /* ct = func(ctx, &tuple, sizeof tuple, 0, 0) */ \ + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), \ + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -48), \ + BPF_MOV64_IMM(BPF_REG_3, sizeof(struct bpf_nf_conntrack_tuple)),\ + BPF_MOV64_IMM(BPF_REG_4, 0), \ + BPF_MOV64_IMM(BPF_REG_5, 0), \ + BPF_EMIT_CALL(BPF_FUNC_ ## func) + /* BPF_SK_LOOKUP contains 13 instructions, if you need to fix up maps */ #define BPF_SK_LOOKUP(func) \ /* struct bpf_sock_tuple tuple = {} */ \ diff --git a/tools/testing/selftests/bpf/verifier/ref_tracking.c b/tools/testing/selftests/bpf/verifier/ref_tracking.c index 604b461..de5c550a 100644 --- a/tools/testing/selftests/bpf/verifier/ref_tracking.c +++ b/tools/testing/selftests/bpf/verifier/ref_tracking.c @@ -21,6 +21,17 @@ .result = REJECT, }, { + "reference tracking: leak potential reference to nf_conn", + .insns = { + BPF_CT_LOOKUP(ct_lookup_tcp), + BPF_MOV64_REG(BPF_REG_6, BPF_REG_0), /* leak reference */ + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .errstr = "Unreleased reference", + .result = REJECT, +}, +{ "reference tracking: leak potential reference on stack", .insns = { BPF_SK_LOOKUP(sk_lookup_tcp), @@ -72,6 +83,17 @@ .result = REJECT, }, { + "reference tracking: zero potential reference to nf_conn", + .insns = { + BPF_CT_LOOKUP(ct_lookup_tcp), + BPF_MOV64_IMM(BPF_REG_0, 0), /* leak reference */ + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .errstr = "Unreleased reference", + .result = REJECT, +}, +{ "reference tracking: copy and zero potential references", .insns = { BPF_SK_LOOKUP(sk_lookup_tcp), @@ -113,6 +135,20 @@ .result = REJECT, }, { + "reference tracking: release reference to nf_conn without check", + .insns = { + BPF_CT_LOOKUP(ct_lookup_tcp), + /* reference in r0 may be NULL */ + BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), + BPF_MOV64_IMM(BPF_REG_2, 0), + BPF_EMIT_CALL(BPF_FUNC_ct_release), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .errstr = "type=nf_conn_or_null expected=nf_conn", + .result = REJECT, +}, +{ "reference tracking: release reference", .insns = { BPF_SK_LOOKUP(sk_lookup_tcp), @@ -137,6 +173,18 @@ .result = ACCEPT, }, { + "reference tracking: release reference to nf_conn", + .insns = { + BPF_CT_LOOKUP(ct_lookup_tcp), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1), + BPF_EMIT_CALL(BPF_FUNC_ct_release), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, +}, +{ "reference tracking: release reference 2", .insns = { BPF_SK_LOOKUP(sk_lookup_tcp), -- 1.8.3.1

5 years, 5 months

6
14
0 0

[PATCH bpf 1/4] selftests: bpf: use a temporary file in test_sockmap

by Lorenz Bauer

Use a proper temporary file for sendpage tests. This means that running the tests doesn't clutter the working directory, and allows running the test on read-only filesystems. Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> --- tools/testing/selftests/bpf/test_sockmap.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 4a851513c842..779e11da979c 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -331,7 +331,7 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, FILE *file; int i, fp; - file = fopen(".sendpage_tst.tmp", "w+"); + file = tmpfile(); if (!file) { perror("create file for sendpage"); return 1; @@ -340,13 +340,8 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, fwrite(&k, sizeof(char), 1, file); fflush(file); fseek(file, 0, SEEK_SET); - fclose(file); - fp = open(".sendpage_tst.tmp", O_RDONLY); - if (fp < 0) { - perror("reopen file for sendpage"); - return 1; - } + fp = fileno(file); clock_gettime(CLOCK_MONOTONIC, &s->start); for (i = 0; i < cnt; i++) { @@ -354,11 +349,11 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, if (!drop && sent < 0) { perror("send loop error"); - close(fp); + fclose(file); return sent; } else if (drop && sent >= 0) { printf("sendpage loop error expected: %i\n", sent); - close(fp); + fclose(file); return -EIO; } @@ -366,7 +361,7 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, s->bytes_sent += sent; } clock_gettime(CLOCK_MONOTONIC, &s->end); - close(fp); + fclose(file); return 0; } -- 2.20.1

5 years, 5 months

4
4
0 0

[PATCH bpf 3/4] selftests: bpf: make reuseport test output more legible

by Lorenz Bauer

Include the name of the mismatching result in human readable format when reporting an error. The new output looks like the following: unexpected result result: [1, 0, 0, 0, 0, 0] expected: [0, 0, 0, 0, 0, 0] mismatch on DROP_ERR_INNER_MAP (bpf_prog_linum:153) check_results:FAIL:382 Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> --- .../bpf/prog_tests/select_reuseport.c | 30 ++++++++++++++++--- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c index 2c37ae7dc214..09a536af139a 100644 --- a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c +++ b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c @@ -316,6 +316,28 @@ static void check_data(int type, sa_family_t family, const struct cmd *cmd, expected.len, result.len, get_linum()); } +static const char *result_to_str(enum result res) +{ + switch (res) { + case DROP_ERR_INNER_MAP: + return "DROP_ERR_INNER_MAP"; + case DROP_ERR_SKB_DATA: + return "DROP_ERR_SKB_DATA"; + case DROP_ERR_SK_SELECT_REUSEPORT: + return "DROP_ERR_SK_SELECT_REUSEPORT"; + case DROP_MISC: + return "DROP_MISC"; + case PASS: + return "PASS"; + case PASS_ERR_SK_SELECT_REUSEPORT: + return "PASS_ERR_SK_SELECT_REUSEPORT"; + case NR_RESULTS: + return "NR_RESULTS"; + default: + return "UNKNOWN"; + } +} + static void check_results(void) { __u32 results[NR_RESULTS]; @@ -351,10 +373,10 @@ static void check_results(void) printf(", %u", expected_results[i]); printf("]\n"); - RET_IF(expected_results[broken] != results[broken], - "unexpected result", - "expected_results[%u] != results[%u] bpf_prog_linum:%ld\n", - broken, broken, get_linum()); + printf("mismatch on %s (bpf_prog_linum:%ld)\n", result_to_str(broken), + get_linum()); + + CHECK_FAIL(true); } static int send_data(int type, sa_family_t family, void *data, size_t len, -- 2.20.1

5 years, 5 months

3
2
0 0

[PATCH bpf 2/4] selftests: bpf: ignore RST packets for reuseport tests

by Lorenz Bauer

The reuseport tests currently suffer from a race condition: RST packets count towards DROP_ERR_SKB_DATA, since they don't contain a valid struct cmd. Tests will spuriously fail depending on whether check_results is called before or after the RST is processed. Exit the BPF program early if FIN is set. Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> --- .../selftests/bpf/progs/test_select_reuseport_kern.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c b/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c index d69a1f2bbbfd..26e77dcc7e91 100644 --- a/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c +++ b/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c @@ -113,6 +113,12 @@ int _select_by_skb_data(struct sk_reuseport_md *reuse_md) data_check.skb_ports[0] = th->source; data_check.skb_ports[1] = th->dest; + if (th->fin) + /* The connection is being torn down at the end of a + * test. It can't contain a cmd, so return early. + */ + return SK_PASS; + if ((th->doff << 2) + sizeof(*cmd) > data_check.len) GOTO_DONE(DROP_ERR_SKB_DATA); if (bpf_skb_load_bytes(reuse_md, th->doff << 2, &cmd_copy, -- 2.20.1

5 years, 5 months

4
6
0 0

[PATCH bpf-next v2 4/4] selftests: bpf: reset global state between reuseport test runs

by Lorenz Bauer

Currently, there is a lot of false positives if a single reuseport test fails. This is because expected_results and the result map are not cleared. Zero both after individual test runs, which fixes the mentioned false positives. Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> Fixes: 91134d849a0e ("bpf: Test BPF_PROG_TYPE_SK_REUSEPORT") --- .../selftests/bpf/prog_tests/select_reuseport.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c index e7e56929751c..098bcae5f827 100644 --- a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c +++ b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c @@ -33,7 +33,7 @@ #define REUSEPORT_ARRAY_SIZE 32 static int result_map, tmp_index_ovr_map, linum_map, data_check_map; -static enum result expected_results[NR_RESULTS]; +static __u32 expected_results[NR_RESULTS]; static int sk_fds[REUSEPORT_ARRAY_SIZE]; static int reuseport_array = -1, outer_map = -1; static int select_by_skb_data_prog; @@ -697,7 +697,19 @@ static void setup_per_test(int type, sa_family_t family, bool inany, static void cleanup_per_test(bool no_inner_map) { - int i, err; + int i, err, zero = 0; + + memset(expected_results, 0, sizeof(expected_results)); + + for (i = 0; i < NR_RESULTS; i++) { + err = bpf_map_update_elem(result_map, &i, &zero, BPF_ANY); + RET_IF(err, "reset elem in result_map", + "i:%u err:%d errno:%d\n", i, err, errno); + } + + err = bpf_map_update_elem(linum_map, &zero, &zero, BPF_ANY); + RET_IF(err, "reset line number in linum_map", "err:%d errno:%d\n", + err, errno); for (i = 0; i < REUSEPORT_ARRAY_SIZE; i++) close(sk_fds[i]); -- 2.20.1

5 years, 5 months

1
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[PATCH bpf-next v2 3/4] selftests: bpf: make reuseport test output more legible

by Lorenz Bauer

Include the name of the mismatching result in human readable format when reporting an error. The new output looks like the following: unexpected result result: [1, 0, 0, 0, 0, 0] expected: [0, 0, 0, 0, 0, 0] mismatch on DROP_ERR_INNER_MAP (bpf_prog_linum:153) check_results:FAIL:382 Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> --- .../bpf/prog_tests/select_reuseport.c | 28 ++++++++++++++++--- 1 file changed, 24 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c index 2c37ae7dc214..e7e56929751c 100644 --- a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c +++ b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c @@ -316,6 +316,26 @@ static void check_data(int type, sa_family_t family, const struct cmd *cmd, expected.len, result.len, get_linum()); } +static const char *result_to_str(enum result res) +{ + switch (res) { + case DROP_ERR_INNER_MAP: + return "DROP_ERR_INNER_MAP"; + case DROP_ERR_SKB_DATA: + return "DROP_ERR_SKB_DATA"; + case DROP_ERR_SK_SELECT_REUSEPORT: + return "DROP_ERR_SK_SELECT_REUSEPORT"; + case DROP_MISC: + return "DROP_MISC"; + case PASS: + return "PASS"; + case PASS_ERR_SK_SELECT_REUSEPORT: + return "PASS_ERR_SK_SELECT_REUSEPORT"; + default: + return "UNKNOWN"; + } +} + static void check_results(void) { __u32 results[NR_RESULTS]; @@ -351,10 +371,10 @@ static void check_results(void) printf(", %u", expected_results[i]); printf("]\n"); - RET_IF(expected_results[broken] != results[broken], - "unexpected result", - "expected_results[%u] != results[%u] bpf_prog_linum:%ld\n", - broken, broken, get_linum()); + printf("mismatch on %s (bpf_prog_linum:%ld)\n", result_to_str(broken), + get_linum()); + + CHECK_FAIL(true); } static int send_data(int type, sa_family_t family, void *data, size_t len, -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH bpf-next v2 2/4] selftests: bpf: ignore FIN packets for reuseport tests

by Lorenz Bauer

The reuseport tests currently suffer from a race condition: FIN packets count towards DROP_ERR_SKB_DATA, since they don't contain a valid struct cmd. Tests will spuriously fail depending on whether check_results is called before or after the FIN is processed. Exit the BPF program early if FIN is set. Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> Fixes: 91134d849a0e ("bpf: Test BPF_PROG_TYPE_SK_REUSEPORT") --- .../selftests/bpf/progs/test_select_reuseport_kern.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c b/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c index d69a1f2bbbfd..26e77dcc7e91 100644 --- a/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c +++ b/tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c @@ -113,6 +113,12 @@ int _select_by_skb_data(struct sk_reuseport_md *reuse_md) data_check.skb_ports[0] = th->source; data_check.skb_ports[1] = th->dest; + if (th->fin) + /* The connection is being torn down at the end of a + * test. It can't contain a cmd, so return early. + */ + return SK_PASS; + if ((th->doff << 2) + sizeof(*cmd) > data_check.len) GOTO_DONE(DROP_ERR_SKB_DATA); if (bpf_skb_load_bytes(reuse_md, th->doff << 2, &cmd_copy, -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH bpf-next v2 1/4] selftests: bpf: use a temporary file in test_sockmap

by Lorenz Bauer

Use a proper temporary file for sendpage tests. This means that running the tests doesn't clutter the working directory, and allows running the test on read-only filesystems. Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> Fixes: 16962b2404ac ("bpf: sockmap, add selftests") --- tools/testing/selftests/bpf/test_sockmap.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 4a851513c842..779e11da979c 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -331,7 +331,7 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, FILE *file; int i, fp; - file = fopen(".sendpage_tst.tmp", "w+"); + file = tmpfile(); if (!file) { perror("create file for sendpage"); return 1; @@ -340,13 +340,8 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, fwrite(&k, sizeof(char), 1, file); fflush(file); fseek(file, 0, SEEK_SET); - fclose(file); - fp = open(".sendpage_tst.tmp", O_RDONLY); - if (fp < 0) { - perror("reopen file for sendpage"); - return 1; - } + fp = fileno(file); clock_gettime(CLOCK_MONOTONIC, &s->start); for (i = 0; i < cnt; i++) { @@ -354,11 +349,11 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, if (!drop && sent < 0) { perror("send loop error"); - close(fp); + fclose(file); return sent; } else if (drop && sent >= 0) { printf("sendpage loop error expected: %i\n", sent); - close(fp); + fclose(file); return -EIO; } @@ -366,7 +361,7 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, s->bytes_sent += sent; } clock_gettime(CLOCK_MONOTONIC, &s->end); - close(fp); + fclose(file); return 0; } -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH bpf 4/4] selftests: bpf: reset global state between reuseport test runs

by Lorenz Bauer

Currently, there is a lot of false positives if a single reuseport test fails. This is because expected_results and the result map are not cleared. Zero both after individual test runs, which fixes the mentioned false positives. Signed-off-by: Lorenz Bauer <lmb(a)cloudflare.com> --- .../selftests/bpf/prog_tests/select_reuseport.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c index 09a536af139a..0bab8b1ca1c3 100644 --- a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c +++ b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c @@ -699,7 +699,19 @@ static void setup_per_test(int type, sa_family_t family, bool inany, static void cleanup_per_test(bool no_inner_map) { - int i, err; + int i, err, zero = 0; + + memset(expected_results, 0, sizeof(expected_results)); + + for (i = 0; i < NR_RESULTS; i++) { + err = bpf_map_update_elem(result_map, &i, &zero, BPF_ANY); + RET_IF(err, "reset elem in result_map", + "i:%u err:%d errno:%d\n", i, err, errno); + } + + err = bpf_map_update_elem(linum_map, &zero, &zero, BPF_ANY); + RET_IF(err, "reset line number in linum_map", "err:%d errno:%d\n", + err, errno); for (i = 0; i < REUSEPORT_ARRAY_SIZE; i++) close(sk_fds[i]); -- 2.20.1

5 years, 5 months

2
1
0 0

[PATCH kunit 0/3] kunit: add debugfs representation to show results/run tests

by Alan Maguire

When kunit tests are run on native (i.e. non-UML) environments, the results of test execution are often intermixed with dmesg output. This patch series attempts to solve this by providing a debugfs representation of the results of the last test run, available as /sys/kernel/debug/kunit/<testsuite>/results In addition, we provide a way to re-run the tests and show results via /sys/kernel/debug/kunit/<testsuite>/run Alan Maguire (3): kunit: add debugfs /sys/kernel/debug/kunit/<suite>/results display kunit: add "run" debugfs file to run suites, display results kunit: update documentation to describe debugfs representation Documentation/dev-tools/kunit/usage.rst | 20 +++++ include/kunit/test.h | 21 +++-- lib/kunit/Makefile | 3 +- lib/kunit/debugfs.c | 145 ++++++++++++++++++++++++++++++++ lib/kunit/debugfs.h | 11 +++ lib/kunit/test.c | 88 ++++++++++++++----- 6 files changed, 260 insertions(+), 28 deletions(-) create mode 100644 lib/kunit/debugfs.c create mode 100644 lib/kunit/debugfs.h -- 1.8.3.1

5 years, 5 months

3
5
0 0

[PATCH v9 1/8] hugetlb_cgroup: Add hugetlb_cgroup reservation counter

by Mina Almasry

These counters will track hugetlb reservations rather than hugetlb memory faulted in. This patch only adds the counter, following patches add the charging and uncharging of the counter. This is patch 1 of an 8 patch series. Problem: Currently tasks attempting to allocate more hugetlb memory than is available get a failure at mmap/shmget time. This is thanks to Hugetlbfs Reservations [1]. However, if a task attempts to allocate hugetlb memory only more than its hugetlb_cgroup limit allows, the kernel will allow the mmap/shmget call, but will SIGBUS the task when it attempts to fault the memory in. We have developers interested in using hugetlb_cgroups, and they have expressed dissatisfaction regarding this behavior. We'd like to improve this behavior such that tasks violating the hugetlb_cgroup limits get an error on mmap/shmget time, rather than getting SIGBUS'd when they try to fault the excess memory in. The underlying problem is that today's hugetlb_cgroup accounting happens at hugetlb memory *fault* time, rather than at *reservation* time. Thus, enforcing the hugetlb_cgroup limit only happens at fault time, and the offending task gets SIGBUS'd. Proposed Solution: A new page counter named hugetlb.xMB.reservation_[limit|usage]_in_bytes. This counter has slightly different semantics than hugetlb.xMB.[limit|usage]_in_bytes: - While usage_in_bytes tracks all *faulted* hugetlb memory, reservation_usage_in_bytes tracks all *reserved* hugetlb memory and hugetlb memory faulted in without a prior reservation. - If a task attempts to reserve more memory than limit_in_bytes allows, the kernel will allow it to do so. But if a task attempts to reserve more memory than reservation_limit_in_bytes, the kernel will fail this reservation. This proposal is implemented in this patch series, with tests to verify functionality and show the usage. We also added cgroup-v2 support to hugetlb_cgroup so that the new use cases can be extended to v2. Alternatives considered: 1. A new cgroup, instead of only a new page_counter attached to the existing hugetlb_cgroup. Adding a new cgroup seemed like a lot of code duplication with hugetlb_cgroup. Keeping hugetlb related page counters under hugetlb_cgroup seemed cleaner as well. 2. Instead of adding a new counter, we considered adding a sysctl that modifies the behavior of hugetlb.xMB.[limit|usage]_in_bytes, to do accounting at reservation time rather than fault time. Adding a new page_counter seems better as userspace could, if it wants, choose to enforce different cgroups differently: one via limit_in_bytes, and another via reservation_limit_in_bytes. This could be very useful if you're transitioning how hugetlb memory is partitioned on your system one cgroup at a time, for example. Also, someone may find usage for both limit_in_bytes and reservation_limit_in_bytes concurrently, and this approach gives them the option to do so. Testing: - Added tests passing. - Used libhugetlbfs for regression testing. [1]: https://www.kernel.org/doc/html/latest/vm/hugetlbfs_reserv.html Signed-off-by: Mina Almasry <almasrymina(a)google.com> Acked-by: Hillf Danton <hdanton(a)sina.com> --- include/linux/hugetlb.h | 4 +- mm/hugetlb_cgroup.c | 116 +++++++++++++++++++++++++++++++++++----- 2 files changed, 106 insertions(+), 14 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 1e897e4168ac1..dea6143aa0685 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -432,8 +432,8 @@ struct hstate { unsigned int surplus_huge_pages_node[MAX_NUMNODES]; #ifdef CONFIG_CGROUP_HUGETLB /* cgroup control files */ - struct cftype cgroup_files_dfl[5]; - struct cftype cgroup_files_legacy[5]; + struct cftype cgroup_files_dfl[7]; + struct cftype cgroup_files_legacy[9]; #endif char name[HSTATE_NAME_LEN]; }; diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index e434b05416c68..35415af9ed26f 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -36,6 +36,11 @@ struct hugetlb_cgroup { */ struct page_counter hugepage[HUGE_MAX_HSTATE]; + /* + * the counter to account for hugepage reservations from hugetlb. + */ + struct page_counter reserved_hugepage[HUGE_MAX_HSTATE]; + atomic_long_t events[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS]; atomic_long_t events_local[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS]; @@ -55,6 +60,14 @@ struct hugetlb_cgroup { static struct hugetlb_cgroup *root_h_cgroup __read_mostly; +static inline struct page_counter * +hugetlb_cgroup_get_counter(struct hugetlb_cgroup *h_cg, int idx, bool reserved) +{ + if (reserved) + return &h_cg->reserved_hugepage[idx]; + return &h_cg->hugepage[idx]; +} + static inline struct hugetlb_cgroup *hugetlb_cgroup_from_css(struct cgroup_subsys_state *s) { @@ -295,28 +308,42 @@ void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, enum { RES_USAGE, + RES_RESERVATION_USAGE, RES_LIMIT, + RES_RESERVATION_LIMIT, RES_MAX_USAGE, + RES_RESERVATION_MAX_USAGE, RES_FAILCNT, + RES_RESERVATION_FAILCNT, }; static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css, struct cftype *cft) { struct page_counter *counter; + struct page_counter *reserved_counter; struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); counter = &h_cg->hugepage[MEMFILE_IDX(cft->private)]; + reserved_counter = &h_cg->reserved_hugepage[MEMFILE_IDX(cft->private)]; switch (MEMFILE_ATTR(cft->private)) { case RES_USAGE: return (u64)page_counter_read(counter) * PAGE_SIZE; + case RES_RESERVATION_USAGE: + return (u64)page_counter_read(reserved_counter) * PAGE_SIZE; case RES_LIMIT: return (u64)counter->max * PAGE_SIZE; + case RES_RESERVATION_LIMIT: + return (u64)reserved_counter->max * PAGE_SIZE; case RES_MAX_USAGE: return (u64)counter->watermark * PAGE_SIZE; + case RES_RESERVATION_MAX_USAGE: + return (u64)reserved_counter->watermark * PAGE_SIZE; case RES_FAILCNT: return counter->failcnt; + case RES_RESERVATION_FAILCNT: + return reserved_counter->failcnt; default: BUG(); } @@ -338,10 +365,16 @@ static int hugetlb_cgroup_read_u64_max(struct seq_file *seq, void *v) 1 << huge_page_order(&hstates[idx])); switch (MEMFILE_ATTR(cft->private)) { + case RES_RESERVATION_USAGE: + counter = &h_cg->reserved_hugepage[idx]; + /* Fall through. */ case RES_USAGE: val = (u64)page_counter_read(counter); seq_printf(seq, "%llu\n", val * PAGE_SIZE); break; + case RES_RESERVATION_LIMIT: + counter = &h_cg->reserved_hugepage[idx]; + /* Fall through. */ case RES_LIMIT: val = (u64)counter->max; if (val == limit) @@ -365,6 +398,7 @@ static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, int ret, idx; unsigned long nr_pages; struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); + bool reserved = false; if (hugetlb_cgroup_is_root(h_cg)) /* Can't set limit on root */ return -EINVAL; @@ -378,9 +412,14 @@ static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, nr_pages = round_down(nr_pages, 1 << huge_page_order(&hstates[idx])); switch (MEMFILE_ATTR(of_cft(of)->private)) { + case RES_RESERVATION_LIMIT: + reserved = true; + /* Fall through. */ case RES_LIMIT: mutex_lock(&hugetlb_limit_mutex); - ret = page_counter_set_max(&h_cg->hugepage[idx], nr_pages); + ret = page_counter_set_max(hugetlb_cgroup_get_counter(h_cg, idx, + reserved), + nr_pages); mutex_unlock(&hugetlb_limit_mutex); break; default: @@ -406,18 +445,26 @@ static ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off) { int ret = 0; - struct page_counter *counter; + struct page_counter *counter, *reserved_counter; struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); counter = &h_cg->hugepage[MEMFILE_IDX(of_cft(of)->private)]; + reserved_counter = + &h_cg->reserved_hugepage[MEMFILE_IDX(of_cft(of)->private)]; switch (MEMFILE_ATTR(of_cft(of)->private)) { case RES_MAX_USAGE: page_counter_reset_watermark(counter); break; + case RES_RESERVATION_MAX_USAGE: + page_counter_reset_watermark(reserved_counter); + break; case RES_FAILCNT: counter->failcnt = 0; break; + case RES_RESERVATION_FAILCNT: + reserved_counter->failcnt = 0; + break; default: ret = -EINVAL; break; @@ -472,7 +519,7 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx) struct hstate *h = &hstates[idx]; /* format the size */ - mem_fmt(buf, 32, huge_page_size(h)); + mem_fmt(buf, sizeof(buf), huge_page_size(h)); /* Add the limit file */ cft = &h->cgroup_files_dfl[0]; @@ -482,15 +529,30 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx) cft->write = hugetlb_cgroup_write_dfl; cft->flags = CFTYPE_NOT_ON_ROOT; - /* Add the current usage file */ + /* Add the reservation limit file */ cft = &h->cgroup_files_dfl[1]; + snprintf(cft->name, MAX_CFTYPE_NAME, "%s.reservation_max", buf); + cft->private = MEMFILE_PRIVATE(idx, RES_RESERVATION_LIMIT); + cft->seq_show = hugetlb_cgroup_read_u64_max; + cft->write = hugetlb_cgroup_write_dfl; + cft->flags = CFTYPE_NOT_ON_ROOT; + + /* Add the current usage file */ + cft = &h->cgroup_files_dfl[2]; snprintf(cft->name, MAX_CFTYPE_NAME, "%s.current", buf); cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); cft->seq_show = hugetlb_cgroup_read_u64_max; cft->flags = CFTYPE_NOT_ON_ROOT; + /* Add the current reservation usage file */ + cft = &h->cgroup_files_dfl[3]; + snprintf(cft->name, MAX_CFTYPE_NAME, "%s.reservation_current", buf); + cft->private = MEMFILE_PRIVATE(idx, RES_RESERVATION_USAGE); + cft->seq_show = hugetlb_cgroup_read_u64_max; + cft->flags = CFTYPE_NOT_ON_ROOT; + /* Add the events file */ - cft = &h->cgroup_files_dfl[2]; + cft = &h->cgroup_files_dfl[4]; snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf); cft->private = MEMFILE_PRIVATE(idx, 0); cft->seq_show = hugetlb_events_show; @@ -498,7 +560,7 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx) cft->flags = CFTYPE_NOT_ON_ROOT; /* Add the events.local file */ - cft = &h->cgroup_files_dfl[3]; + cft = &h->cgroup_files_dfl[5]; snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events.local", buf); cft->private = MEMFILE_PRIVATE(idx, 0); cft->seq_show = hugetlb_events_local_show; @@ -507,7 +569,7 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx) cft->flags = CFTYPE_NOT_ON_ROOT; /* NULL terminate the last cft */ - cft = &h->cgroup_files_dfl[4]; + cft = &h->cgroup_files_dfl[6]; memset(cft, 0, sizeof(*cft)); WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys, @@ -530,28 +592,58 @@ static void __init __hugetlb_cgroup_file_legacy_init(int idx) cft->read_u64 = hugetlb_cgroup_read_u64; cft->write = hugetlb_cgroup_write_legacy; - /* Add the usage file */ + /* Add the reservation limit file */ cft = &h->cgroup_files_legacy[1]; + snprintf(cft->name, MAX_CFTYPE_NAME, "%s.reservation_limit_in_bytes", + buf); + cft->private = MEMFILE_PRIVATE(idx, RES_RESERVATION_LIMIT); + cft->read_u64 = hugetlb_cgroup_read_u64; + cft->write = hugetlb_cgroup_write_legacy; + + /* Add the usage file */ + cft = &h->cgroup_files_legacy[2]; snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf); cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); cft->read_u64 = hugetlb_cgroup_read_u64; + /* Add the reservation usage file */ + cft = &h->cgroup_files_legacy[3]; + snprintf(cft->name, MAX_CFTYPE_NAME, "%s.reservation_usage_in_bytes", + buf); + cft->private = MEMFILE_PRIVATE(idx, RES_RESERVATION_USAGE); + cft->read_u64 = hugetlb_cgroup_read_u64; + /* Add the MAX usage file */ - cft = &h->cgroup_files_legacy[2]; + cft = &h->cgroup_files_legacy[4]; snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf); cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE); cft->write = hugetlb_cgroup_reset; cft->read_u64 = hugetlb_cgroup_read_u64; + /* Add the MAX reservation usage file */ + cft = &h->cgroup_files_legacy[5]; + snprintf(cft->name, MAX_CFTYPE_NAME, + "%s.reservation_max_usage_in_bytes", buf); + cft->private = MEMFILE_PRIVATE(idx, RES_RESERVATION_MAX_USAGE); + cft->write = hugetlb_cgroup_reset; + cft->read_u64 = hugetlb_cgroup_read_u64; + /* Add the failcntfile */ - cft = &h->cgroup_files_legacy[3]; + cft = &h->cgroup_files_legacy[6]; snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf); - cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT); + cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT); + cft->write = hugetlb_cgroup_reset; + cft->read_u64 = hugetlb_cgroup_read_u64; + + /* Add the reservation failcntfile */ + cft = &h->cgroup_files_legacy[7]; + snprintf(cft->name, MAX_CFTYPE_NAME, "%s.reservation_failcnt", buf); + cft->private = MEMFILE_PRIVATE(idx, RES_RESERVATION_FAILCNT); cft->write = hugetlb_cgroup_reset; cft->read_u64 = hugetlb_cgroup_read_u64; /* NULL terminate the last cft */ - cft = &h->cgroup_files_legacy[4]; + cft = &h->cgroup_files_legacy[8]; memset(cft, 0, sizeof(*cft)); WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys, -- 2.24.1.735.g03f4e72817-goog

5 years, 5 months

4
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0 0

[PATCH 1/3] selftests/x86: Build with LDFLAGS and LDLIBS

by Daniel Díaz

During cross-compilation, it was discovered that LDFLAGS and LDLIBS were not being used while building binaries, leading to defaults which were not necessarily correct. OpenEmbedded reported this kind of problem: ERROR: QA Issue: No GNU_HASH in the ELF binary [...], didn't pass LDFLAGS? Signed-off-by: Daniel Díaz <daniel.diaz(a)linaro.org> --- tools/testing/selftests/x86/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index 5d49bfec1e9a..f8360454eafd 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -71,10 +71,10 @@ all_64: $(BINARIES_64) EXTRA_CLEAN := $(BINARIES_32) $(BINARIES_64) $(BINARIES_32): $(OUTPUT)/%_32: %.c - $(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl -lm + $(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -lrt -ldl -lm $(BINARIES_64): $(OUTPUT)/%_64: %.c - $(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl + $(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -lrt -ldl # x86_64 users should be encouraged to install 32-bit libraries ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01) -- 2.20.1

5 years, 5 months

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Re: [RFC PATCH v1] pin_on_cpu: Introduce thread CPU pinning system call

by Mathieu Desnoyers

(replying again as plain text for mailing lists) ----- On Jan 22, 2020, at 10:44 AM, Jan Ziak 0xe2.0x9a.0x9b(a)gmail.com wrote: > Hello > I would like to note that this does not help userspace to express dynamic > scheduling relationships among processes/threads such as "do not run processes > A and B on the same core" or "run processes A and B on cores sharing the same > L2 cache". Indeed, this is not what this system call is trying to solve. Does the name "pin_on_cpu" lead to confusion here ? I thought that cgroups was already the mechanism taking care of this kind of requirement. Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com

5 years, 5 months

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Re: [RFC PATCH v1] pin_on_cpu: Introduce thread CPU pinning system call

by Jan Ziak

Hello I would like to note that this does not help userspace to express dynamic scheduling relationships among processes/threads such as "do not run processes A and B on the same core" or "run processes A and B on cores sharing the same L2 cache". Sincerely Jan

5 years, 5 months

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[PATCH v5 6/6] selftests/cgroup: add tests for cloning into cgroups

by Christian Brauner

Expand the cgroup test-suite to include tests for CLONE_INTO_CGROUP. This adds the following tests: - CLONE_INTO_CGROUP manages to clone a process directly into a correctly delegated cgroup - CLONE_INTO_CGROUP fails to clone a process into a cgroup that has been removed after we've opened an fd to it - CLONE_INTO_CGROUP fails to clone a process into an invalid domain cgroup - CLONE_INTO_CGROUP adheres to the no internal process constraint - CLONE_INTO_CGROUP works with the freezer feature Cc: Tejun Heo <tj(a)kernel.org> Cc: Shuah Khan <shuah(a)kernel.org> Cc: cgroups(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Acked-by: Roman Gushchin <guro(a)fb.com> Signed-off-by: Christian Brauner <christian.brauner(a)ubuntu.com> --- /* v1 */ Link: https://lore.kernel.org/r/20191218173516.7875-4-christian.brauner@ubuntu.com /* v2 */ Link: https://lore.kernel.org/r/20191223061504.28716-4-christian.brauner@ubuntu.c… unchanged /* v3 */ Link: https://lore.kernel.org/r/20200117002143.15559-6-christian.brauner@ubuntu.c… unchanged /* v4 */ Link: https://lore.kernel.org/r/20200117181219.14542-7-christian.brauner@ubuntu.c… unchanged /* v5 */ unchanged - Christian Brauner <christian.brauner(a)ubuntu.com>: - add Acked-by: Roman Gushchin <guro(a)fb.com> Signed-off-by: Christian Brauner <christian.brauner(a)ubuntu.com> --- tools/testing/selftests/cgroup/Makefile | 6 +- tools/testing/selftests/cgroup/cgroup_util.c | 126 ++++++++++++++++++ tools/testing/selftests/cgroup/cgroup_util.h | 4 + tools/testing/selftests/cgroup/test_core.c | 64 +++++++++ .../selftests/clone3/clone3_selftests.h | 19 ++- 5 files changed, 214 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/cgroup/Makefile b/tools/testing/selftests/cgroup/Makefile index 66aafe1f5746..967f268fde74 100644 --- a/tools/testing/selftests/cgroup/Makefile +++ b/tools/testing/selftests/cgroup/Makefile @@ -11,6 +11,6 @@ TEST_GEN_PROGS += test_freezer include ../lib.mk -$(OUTPUT)/test_memcontrol: cgroup_util.c -$(OUTPUT)/test_core: cgroup_util.c -$(OUTPUT)/test_freezer: cgroup_util.c +$(OUTPUT)/test_memcontrol: cgroup_util.c ../clone3/clone3_selftests.h +$(OUTPUT)/test_core: cgroup_util.c ../clone3/clone3_selftests.h +$(OUTPUT)/test_freezer: cgroup_util.c ../clone3/clone3_selftests.h diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 8f7131dcf1ff..8a637ca7d73a 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -15,6 +15,7 @@ #include <unistd.h> #include "cgroup_util.h" +#include "../clone3/clone3_selftests.h" static ssize_t read_text(const char *path, char *buf, size_t max_len) { @@ -331,12 +332,112 @@ int cg_run(const char *cgroup, } } +pid_t clone_into_cgroup(int cgroup_fd) +{ +#ifdef CLONE_ARGS_SIZE_VER2 + pid_t pid; + + struct clone_args args = { + .flags = CLONE_INTO_CGROUP, + .exit_signal = SIGCHLD, + .cgroup = cgroup_fd, + }; + + pid = sys_clone3(&args, sizeof(struct clone_args)); + /* + * Verify that this is a genuine test failure: + * ENOSYS -> clone3() not available + * E2BIG -> CLONE_INTO_CGROUP not available + */ + if (pid < 0 && (errno == ENOSYS || errno == E2BIG)) + goto pretend_enosys; + + return pid; + +pretend_enosys: +#endif + errno = ENOSYS; + return -ENOSYS; +} + +int clone_reap(pid_t pid, int options) +{ + int ret; + siginfo_t info = { + .si_signo = 0, + }; + +again: + ret = waitid(P_PID, pid, &info, options | __WALL | __WNOTHREAD); + if (ret < 0) { + if (errno == EINTR) + goto again; + return -1; + } + + if (options & WEXITED) { + if (WIFEXITED(info.si_status)) + return WEXITSTATUS(info.si_status); + } + + if (options & WSTOPPED) { + if (WIFSTOPPED(info.si_status)) + return WSTOPSIG(info.si_status); + } + + if (options & WCONTINUED) { + if (WIFCONTINUED(info.si_status)) + return 0; + } + + return -1; +} + +int dirfd_open_opath(const char *dir) +{ + return open(dir, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW | O_PATH); +} + +#define close_prot_errno(fd) \ + if (fd >= 0) { \ + int _e_ = errno; \ + close(fd); \ + errno = _e_; \ + } + +static int clone_into_cgroup_run_nowait(const char *cgroup, + int (*fn)(const char *cgroup, void *arg), + void *arg) +{ + int cgroup_fd; + pid_t pid; + + cgroup_fd = dirfd_open_opath(cgroup); + if (cgroup_fd < 0) + return -1; + + pid = clone_into_cgroup(cgroup_fd); + close_prot_errno(cgroup_fd); + if (pid == 0) + exit(fn(cgroup, arg)); + + return pid; +} + int cg_run_nowait(const char *cgroup, int (*fn)(const char *cgroup, void *arg), void *arg) { int pid; + pid = clone_into_cgroup_run_nowait(cgroup, fn, arg); + if (pid > 0) + return pid; + + /* Genuine test failure. */ + if (pid < 0 && errno != ENOSYS) + return -1; + pid = fork(); if (pid == 0) { char buf[64]; @@ -450,3 +551,28 @@ int proc_read_strstr(int pid, bool thread, const char *item, const char *needle) return strstr(buf, needle) ? 0 : -1; } + +int clone_into_cgroup_run_wait(const char *cgroup) +{ + int cgroup_fd; + pid_t pid; + + cgroup_fd = dirfd_open_opath(cgroup); + if (cgroup_fd < 0) + return -1; + + pid = clone_into_cgroup(cgroup_fd); + close_prot_errno(cgroup_fd); + if (pid < 0) + return -1; + + if (pid == 0) + exit(EXIT_SUCCESS); + + /* + * We don't care whether this fails. We only care whether the initial + * clone succeeded. + */ + (void)clone_reap(pid, WEXITED); + return 0; +} diff --git a/tools/testing/selftests/cgroup/cgroup_util.h b/tools/testing/selftests/cgroup/cgroup_util.h index 49c54fbdb229..5a1305dd1f0b 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.h +++ b/tools/testing/selftests/cgroup/cgroup_util.h @@ -50,3 +50,7 @@ extern int cg_wait_for_proc_count(const char *cgroup, int count); extern int cg_killall(const char *cgroup); extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); +extern pid_t clone_into_cgroup(int cgroup_fd); +extern int clone_reap(pid_t pid, int options); +extern int clone_into_cgroup_run_wait(const char *cgroup); +extern int dirfd_open_opath(const char *dir); diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index c5ca669feb2b..96e016ccafe0 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -25,8 +25,11 @@ static int test_cgcore_populated(const char *root) { int ret = KSFT_FAIL; + int err; char *cg_test_a = NULL, *cg_test_b = NULL; char *cg_test_c = NULL, *cg_test_d = NULL; + int cgroup_fd = -EBADF; + pid_t pid; cg_test_a = cg_name(root, "cg_test_a"); cg_test_b = cg_name(root, "cg_test_a/cg_test_b"); @@ -78,6 +81,52 @@ static int test_cgcore_populated(const char *root) if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n")) goto cleanup; + /* Test that we can directly clone into a new cgroup. */ + cgroup_fd = dirfd_open_opath(cg_test_d); + if (cgroup_fd < 0) + goto cleanup; + + pid = clone_into_cgroup(cgroup_fd); + if (pid < 0) { + if (errno == ENOSYS) + goto cleanup_pass; + goto cleanup; + } + + if (pid == 0) { + if (raise(SIGSTOP)) + exit(EXIT_FAILURE); + exit(EXIT_SUCCESS); + } + + err = cg_read_strcmp(cg_test_d, "cgroup.events", "populated 1\n"); + + (void)clone_reap(pid, WSTOPPED); + (void)kill(pid, SIGCONT); + (void)clone_reap(pid, WEXITED); + + if (err) + goto cleanup; + + if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n")) + goto cleanup; + + /* Remove cgroup. */ + if (cg_test_d) { + cg_destroy(cg_test_d); + free(cg_test_d); + cg_test_d = NULL; + } + + pid = clone_into_cgroup(cgroup_fd); + if (pid < 0) + goto cleanup_pass; + if (pid == 0) + exit(EXIT_SUCCESS); + (void)clone_reap(pid, WEXITED); + goto cleanup; + +cleanup_pass: ret = KSFT_PASS; cleanup: @@ -93,6 +142,8 @@ static int test_cgcore_populated(const char *root) free(cg_test_c); free(cg_test_b); free(cg_test_a); + if (cgroup_fd >= 0) + close(cgroup_fd); return ret; } @@ -136,6 +187,16 @@ static int test_cgcore_invalid_domain(const char *root) if (errno != EOPNOTSUPP) goto cleanup; + if (!clone_into_cgroup_run_wait(child)) + goto cleanup; + + if (errno == ENOSYS) + goto cleanup_pass; + + if (errno != EOPNOTSUPP) + goto cleanup; + +cleanup_pass: ret = KSFT_PASS; cleanup: @@ -345,6 +406,9 @@ static int test_cgcore_internal_process_constraint(const char *root) if (!cg_enter_current(parent)) goto cleanup; + if (!clone_into_cgroup_run_wait(parent)) + goto cleanup; + ret = KSFT_PASS; cleanup: diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h index a3f2c8ad8bcc..91c1a78ddb39 100644 --- a/tools/testing/selftests/clone3/clone3_selftests.h +++ b/tools/testing/selftests/clone3/clone3_selftests.h @@ -5,12 +5,24 @@ #define _GNU_SOURCE #include <sched.h> +#include <linux/sched.h> +#include <linux/types.h> #include <stdint.h> #include <syscall.h> -#include <linux/types.h> +#include <sys/wait.h> + +#include "../kselftest.h" #define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr))) +#ifndef CLONE_INTO_CGROUP +#define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */ +#endif + +#ifndef CLONE_ARGS_SIZE_VER0 +#define CLONE_ARGS_SIZE_VER0 64 +#endif + #ifndef __NR_clone3 #define __NR_clone3 -1 struct clone_args { @@ -22,10 +34,13 @@ struct clone_args { __aligned_u64 stack; __aligned_u64 stack_size; __aligned_u64 tls; +#define CLONE_ARGS_SIZE_VER1 80 __aligned_u64 set_tid; __aligned_u64 set_tid_size; +#define CLONE_ARGS_SIZE_VER2 88 + __aligned_u64 cgroup; }; -#endif +#endif /* __NR_clone3 */ static pid_t sys_clone3(struct clone_args *args, size_t size) { -- 2.25.0

5 years, 5 months

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[PATCH bpf-next v5 00/11] tools: Use consistent libbpf include paths everywhere

by Toke Høiland-Jørgensen

We are currently being somewhat inconsistent with the libbpf include paths, which makes it difficult to move files from the kernel into an external libbpf-using project without adjusting include paths. Having the bpf/ subdir of $INCLUDEDIR in the include path has never been a requirement for building against libbpf before, and indeed the libbpf pkg-config file doesn't include it. So let's make all libbpf includes across the kernel tree use the bpf/ prefix in their includes. Since bpftool skeleton generation emits code with a libbpf include, this also ensures that those can be used in existing external projects using the regular pkg-config include path. This turns out to be a somewhat invasive change in the number of files touched; however, the actual changes to files are fairly trivial (most of them are simply made with 'sed'). The series is split to make the change for one tool subdir at a time, while trying not to break the build along the way. It is structured like this: - Patch 1-3: Trivial fixes to Makefiles for issues I discovered while changing the include paths. - Patch 4-8: Change the include directives to use the bpf/ prefix, and updates Makefiles to make sure tools/lib/ is part of the include path, but without removing tools/lib/bpf - Patch 9-11: Remove tools/lib/bpf from include paths to make sure we don't inadvertently re-introduce includes without the bpf/ prefix. Changelog: v5: - Combine the libbpf build rules in selftests Makefile (using Andrii's suggestion for a make rule). - Re-use self-tests libbpf build for runqslower (new patch 10) - Formatting fixes v4: - Move runqslower error on missing BTF into make rule - Make sure we don't always force a rebuild selftests - Rebase on latest bpf-next (dropping patch 11) v3: - Don't add the kernel build dir to the runqslower Makefile, pass it in from selftests instead. - Use libbpf's 'make install_headers' in selftests instead of trying to generate bpf_helper_defs.h in-place (to also work on read-only filesystems). - Use a scratch builddir for both libbpf and bpftool when building in selftests. - Revert bpf_helpers.h to quoted include instead of angled include with a bpf/ prefix. - Fix a few style nits from Andrii v2: - Do a full cleanup of libbpf includes instead of just changing the bpf_helper_defs.h include. --- Toke Høiland-Jørgensen (11): samples/bpf: Don't try to remove user's homedir on clean tools/bpf/runqslower: Fix override option for VMLINUX_BTF selftests: Pass VMLINUX_BTF to runqslower Makefile tools/runqslower: Use consistent include paths for libbpf selftests: Use consistent include paths for libbpf bpftool: Use consistent include paths for libbpf perf: Use consistent include paths for libbpf samples/bpf: Use consistent include paths for libbpf tools/runqslower: Remove tools/lib/bpf from include path runsqslower: Support user-specified libbpf include and object paths selftests: Refactor build to remove tools/lib/bpf from include path samples/bpf/Makefile | 5 +- samples/bpf/cpustat_kern.c | 2 - samples/bpf/fds_example.c | 2 - samples/bpf/hbm.c | 4 + samples/bpf/hbm_kern.h | 4 + samples/bpf/ibumad_kern.c | 2 - samples/bpf/ibumad_user.c | 2 - samples/bpf/lathist_kern.c | 2 - samples/bpf/lwt_len_hist_kern.c | 2 - samples/bpf/map_perf_test_kern.c | 4 + samples/bpf/offwaketime_kern.c | 4 + samples/bpf/offwaketime_user.c | 2 - samples/bpf/parse_ldabs.c | 2 - samples/bpf/parse_simple.c | 2 - samples/bpf/parse_varlen.c | 2 - samples/bpf/sampleip_kern.c | 4 + samples/bpf/sampleip_user.c | 2 - samples/bpf/sock_flags_kern.c | 2 - samples/bpf/sockex1_kern.c | 2 - samples/bpf/sockex1_user.c | 2 - samples/bpf/sockex2_kern.c | 2 - samples/bpf/sockex2_user.c | 2 - samples/bpf/sockex3_kern.c | 2 - samples/bpf/spintest_kern.c | 4 + samples/bpf/spintest_user.c | 2 - samples/bpf/syscall_tp_kern.c | 2 - samples/bpf/task_fd_query_kern.c | 2 - samples/bpf/task_fd_query_user.c | 2 - samples/bpf/tc_l2_redirect_kern.c | 2 - samples/bpf/tcbpf1_kern.c | 2 - samples/bpf/tcp_basertt_kern.c | 4 + samples/bpf/tcp_bufs_kern.c | 4 + samples/bpf/tcp_clamp_kern.c | 4 + samples/bpf/tcp_cong_kern.c | 4 + samples/bpf/tcp_dumpstats_kern.c | 4 + samples/bpf/tcp_iw_kern.c | 4 + samples/bpf/tcp_rwnd_kern.c | 4 + samples/bpf/tcp_synrto_kern.c | 4 + samples/bpf/tcp_tos_reflect_kern.c | 4 + samples/bpf/test_cgrp2_tc_kern.c | 2 - samples/bpf/test_current_task_under_cgroup_kern.c | 2 - samples/bpf/test_lwt_bpf.c | 2 - samples/bpf/test_map_in_map_kern.c | 4 + samples/bpf/test_overhead_kprobe_kern.c | 4 + samples/bpf/test_overhead_raw_tp_kern.c | 2 - samples/bpf/test_overhead_tp_kern.c | 2 - samples/bpf/test_probe_write_user_kern.c | 4 + samples/bpf/trace_event_kern.c | 4 + samples/bpf/trace_event_user.c | 2 - samples/bpf/trace_output_kern.c | 2 - samples/bpf/trace_output_user.c | 2 - samples/bpf/tracex1_kern.c | 4 + samples/bpf/tracex2_kern.c | 4 + samples/bpf/tracex3_kern.c | 4 + samples/bpf/tracex4_kern.c | 4 + samples/bpf/tracex5_kern.c | 4 + samples/bpf/tracex6_kern.c | 2 - samples/bpf/tracex7_kern.c | 2 - samples/bpf/xdp1_kern.c | 2 - samples/bpf/xdp1_user.c | 4 + samples/bpf/xdp2_kern.c | 2 - samples/bpf/xdp2skb_meta_kern.c | 2 - samples/bpf/xdp_adjust_tail_kern.c | 2 - samples/bpf/xdp_adjust_tail_user.c | 4 + samples/bpf/xdp_fwd_kern.c | 2 - samples/bpf/xdp_fwd_user.c | 2 - samples/bpf/xdp_monitor_kern.c | 2 - samples/bpf/xdp_redirect_cpu_kern.c | 2 - samples/bpf/xdp_redirect_cpu_user.c | 2 - samples/bpf/xdp_redirect_kern.c | 2 - samples/bpf/xdp_redirect_map_kern.c | 2 - samples/bpf/xdp_redirect_map_user.c | 2 - samples/bpf/xdp_redirect_user.c | 2 - samples/bpf/xdp_router_ipv4_kern.c | 2 - samples/bpf/xdp_router_ipv4_user.c | 2 - samples/bpf/xdp_rxq_info_kern.c | 2 - samples/bpf/xdp_rxq_info_user.c | 4 + samples/bpf/xdp_sample_pkts_kern.c | 2 - samples/bpf/xdp_sample_pkts_user.c | 2 - samples/bpf/xdp_tx_iptunnel_kern.c | 2 - samples/bpf/xdp_tx_iptunnel_user.c | 2 - samples/bpf/xdpsock_kern.c | 2 - samples/bpf/xdpsock_user.c | 6 +- tools/bpf/bpftool/Documentation/bpftool-gen.rst | 2 - tools/bpf/bpftool/Makefile | 2 - tools/bpf/bpftool/btf.c | 8 +- tools/bpf/bpftool/btf_dumper.c | 2 - tools/bpf/bpftool/cgroup.c | 2 - tools/bpf/bpftool/common.c | 4 + tools/bpf/bpftool/feature.c | 4 + tools/bpf/bpftool/gen.c | 10 ++- tools/bpf/bpftool/jit_disasm.c | 2 - tools/bpf/bpftool/main.c | 4 + tools/bpf/bpftool/map.c | 4 + tools/bpf/bpftool/map_perf_ring.c | 4 + tools/bpf/bpftool/net.c | 8 +- tools/bpf/bpftool/netlink_dumper.c | 4 + tools/bpf/bpftool/perf.c | 2 - tools/bpf/bpftool/prog.c | 6 +- tools/bpf/bpftool/xlated_dumper.c | 2 - tools/bpf/runqslower/Makefile | 36 ++++++----- tools/bpf/runqslower/runqslower.bpf.c | 2 - tools/bpf/runqslower/runqslower.c | 4 + tools/perf/examples/bpf/5sec.c | 2 - tools/perf/examples/bpf/empty.c | 2 - tools/perf/examples/bpf/sys_enter_openat.c | 2 - tools/perf/include/bpf/pid_filter.h | 2 - tools/perf/include/bpf/stdio.h | 2 - tools/perf/include/bpf/unistd.h | 2 - tools/testing/selftests/bpf/.gitignore | 4 - tools/testing/selftests/bpf/Makefile | 65 ++++++++++---------- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 4 + tools/testing/selftests/bpf/bpf_trace_helpers.h | 2 - tools/testing/selftests/bpf/bpf_util.h | 2 - tools/testing/selftests/bpf/prog_tests/cpu_mask.c | 2 - .../testing/selftests/bpf/prog_tests/perf_buffer.c | 2 - tools/testing/selftests/bpf/progs/bpf_dctcp.c | 4 + tools/testing/selftests/bpf/progs/bpf_flow.c | 4 + tools/testing/selftests/bpf/progs/connect4_prog.c | 4 + tools/testing/selftests/bpf/progs/connect6_prog.c | 4 + tools/testing/selftests/bpf/progs/dev_cgroup.c | 2 - tools/testing/selftests/bpf/progs/fentry_test.c | 2 - tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c | 2 - .../selftests/bpf/progs/fexit_bpf2bpf_simple.c | 2 - tools/testing/selftests/bpf/progs/fexit_test.c | 2 - .../selftests/bpf/progs/get_cgroup_id_kern.c | 2 - tools/testing/selftests/bpf/progs/kfree_skb.c | 4 + tools/testing/selftests/bpf/progs/loop1.c | 4 + tools/testing/selftests/bpf/progs/loop2.c | 4 + tools/testing/selftests/bpf/progs/loop3.c | 4 + tools/testing/selftests/bpf/progs/loop4.c | 2 - tools/testing/selftests/bpf/progs/loop5.c | 2 - tools/testing/selftests/bpf/progs/netcnt_prog.c | 2 - tools/testing/selftests/bpf/progs/pyperf.h | 2 - .../testing/selftests/bpf/progs/sample_map_ret0.c | 2 - tools/testing/selftests/bpf/progs/sendmsg4_prog.c | 4 + tools/testing/selftests/bpf/progs/sendmsg6_prog.c | 4 + .../selftests/bpf/progs/socket_cookie_prog.c | 4 + .../selftests/bpf/progs/sockmap_parse_prog.c | 4 + .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 4 + .../selftests/bpf/progs/sockmap_verdict_prog.c | 4 + .../testing/selftests/bpf/progs/sockopt_inherit.c | 2 - tools/testing/selftests/bpf/progs/sockopt_multi.c | 2 - tools/testing/selftests/bpf/progs/sockopt_sk.c | 2 - tools/testing/selftests/bpf/progs/strobemeta.h | 2 - tools/testing/selftests/bpf/progs/tailcall1.c | 2 - tools/testing/selftests/bpf/progs/tailcall2.c | 2 - tools/testing/selftests/bpf/progs/tailcall3.c | 2 - tools/testing/selftests/bpf/progs/tailcall4.c | 2 - tools/testing/selftests/bpf/progs/tailcall5.c | 2 - tools/testing/selftests/bpf/progs/tcp_rtt.c | 2 - .../testing/selftests/bpf/progs/test_adjust_tail.c | 2 - .../selftests/bpf/progs/test_attach_probe.c | 2 - tools/testing/selftests/bpf/progs/test_btf_haskv.c | 2 - tools/testing/selftests/bpf/progs/test_btf_newkv.c | 2 - tools/testing/selftests/bpf/progs/test_btf_nokv.c | 2 - .../testing/selftests/bpf/progs/test_core_extern.c | 2 - .../selftests/bpf/progs/test_core_reloc_arrays.c | 4 + .../bpf/progs/test_core_reloc_bitfields_direct.c | 4 + .../bpf/progs/test_core_reloc_bitfields_probed.c | 4 + .../bpf/progs/test_core_reloc_existence.c | 4 + .../selftests/bpf/progs/test_core_reloc_flavors.c | 4 + .../selftests/bpf/progs/test_core_reloc_ints.c | 4 + .../selftests/bpf/progs/test_core_reloc_kernel.c | 4 + .../selftests/bpf/progs/test_core_reloc_misc.c | 4 + .../selftests/bpf/progs/test_core_reloc_mods.c | 4 + .../selftests/bpf/progs/test_core_reloc_nesting.c | 4 + .../bpf/progs/test_core_reloc_primitives.c | 4 + .../bpf/progs/test_core_reloc_ptr_as_arr.c | 4 + .../selftests/bpf/progs/test_core_reloc_size.c | 4 + .../selftests/bpf/progs/test_get_stack_rawtp.c | 2 - .../testing/selftests/bpf/progs/test_global_data.c | 2 - .../selftests/bpf/progs/test_global_func1.c | 2 - .../selftests/bpf/progs/test_global_func3.c | 2 - .../selftests/bpf/progs/test_global_func5.c | 2 - .../selftests/bpf/progs/test_global_func6.c | 2 - .../selftests/bpf/progs/test_global_func7.c | 2 - tools/testing/selftests/bpf/progs/test_l4lb.c | 4 + .../selftests/bpf/progs/test_l4lb_noinline.c | 4 + .../selftests/bpf/progs/test_lirc_mode2_kern.c | 2 - .../selftests/bpf/progs/test_lwt_ip_encap.c | 4 + .../selftests/bpf/progs/test_lwt_seg6local.c | 4 + .../testing/selftests/bpf/progs/test_map_in_map.c | 2 - tools/testing/selftests/bpf/progs/test_map_lock.c | 2 - tools/testing/selftests/bpf/progs/test_mmap.c | 2 - tools/testing/selftests/bpf/progs/test_obj_id.c | 2 - tools/testing/selftests/bpf/progs/test_overhead.c | 4 + .../testing/selftests/bpf/progs/test_perf_buffer.c | 2 - tools/testing/selftests/bpf/progs/test_pinning.c | 2 - .../selftests/bpf/progs/test_pinning_invalid.c | 2 - .../testing/selftests/bpf/progs/test_pkt_access.c | 4 + .../selftests/bpf/progs/test_pkt_md_access.c | 2 - .../testing/selftests/bpf/progs/test_probe_user.c | 4 + .../selftests/bpf/progs/test_queue_stack_map.h | 2 - .../testing/selftests/bpf/progs/test_rdonly_maps.c | 2 - tools/testing/selftests/bpf/progs/test_seg6_loop.c | 4 + .../bpf/progs/test_select_reuseport_kern.c | 4 + .../selftests/bpf/progs/test_send_signal_kern.c | 2 - .../selftests/bpf/progs/test_sk_lookup_kern.c | 4 + .../selftests/bpf/progs/test_skb_cgroup_id_kern.c | 2 - tools/testing/selftests/bpf/progs/test_skb_ctx.c | 2 - tools/testing/selftests/bpf/progs/test_skeleton.c | 2 - .../selftests/bpf/progs/test_sock_fields_kern.c | 4 + tools/testing/selftests/bpf/progs/test_spin_lock.c | 2 - .../selftests/bpf/progs/test_stacktrace_build_id.c | 2 - .../selftests/bpf/progs/test_stacktrace_map.c | 2 - .../selftests/bpf/progs/test_sysctl_loop1.c | 2 - .../selftests/bpf/progs/test_sysctl_loop2.c | 2 - .../testing/selftests/bpf/progs/test_sysctl_prog.c | 2 - tools/testing/selftests/bpf/progs/test_tc_edt.c | 4 + tools/testing/selftests/bpf/progs/test_tc_tunnel.c | 4 + .../bpf/progs/test_tcp_check_syncookie_kern.c | 4 + .../testing/selftests/bpf/progs/test_tcp_estats.c | 2 - .../testing/selftests/bpf/progs/test_tcpbpf_kern.c | 4 + .../selftests/bpf/progs/test_tcpnotify_kern.c | 4 + .../testing/selftests/bpf/progs/test_tracepoint.c | 2 - .../testing/selftests/bpf/progs/test_tunnel_kern.c | 4 + .../selftests/bpf/progs/test_verif_scale1.c | 2 - .../selftests/bpf/progs/test_verif_scale2.c | 2 - .../selftests/bpf/progs/test_verif_scale3.c | 2 - tools/testing/selftests/bpf/progs/test_xdp.c | 4 + .../testing/selftests/bpf/progs/test_xdp_bpf2bpf.c | 2 - tools/testing/selftests/bpf/progs/test_xdp_loop.c | 4 + tools/testing/selftests/bpf/progs/test_xdp_meta.c | 2 - .../selftests/bpf/progs/test_xdp_noinline.c | 4 + .../selftests/bpf/progs/test_xdp_redirect.c | 2 - tools/testing/selftests/bpf/progs/test_xdp_vlan.c | 4 + tools/testing/selftests/bpf/progs/xdp_dummy.c | 2 - .../testing/selftests/bpf/progs/xdp_redirect_map.c | 2 - tools/testing/selftests/bpf/progs/xdp_tx.c | 2 - tools/testing/selftests/bpf/progs/xdping_kern.c | 4 + tools/testing/selftests/bpf/test_cpp.cpp | 6 +- tools/testing/selftests/bpf/test_hashmap.c | 2 - tools/testing/selftests/bpf/test_progs.h | 2 - tools/testing/selftests/bpf/test_sock.c | 2 - tools/testing/selftests/bpf/test_sockmap_kern.h | 4 + tools/testing/selftests/bpf/test_sysctl.c | 2 - tools/testing/selftests/bpf/trace_helpers.h | 2 - 238 files changed, 392 insertions(+), 388 deletions(-)

5 years, 5 months

3
15
0 0

[PATCH bpf-next v4 00/10] tools: Use consistent libbpf include paths everywhere

by Toke Høiland-Jørgensen

We are currently being somewhat inconsistent with the libbpf include paths, which makes it difficult to move files from the kernel into an external libbpf-using project without adjusting include paths. Having the bpf/ subdir of $INCLUDEDIR in the include path has never been a requirement for building against libbpf before, and indeed the libbpf pkg-config file doesn't include it. So let's make all libbpf includes across the kernel tree use the bpf/ prefix in their includes. Since bpftool skeleton generation emits code with a libbpf include, this also ensures that those can be used in existing external projects using the regular pkg-config include path. This turns out to be a somewhat invasive change in the number of files touched; however, the actual changes to files are fairly trivial (most of them are simply made with 'sed'). The series is split to make the change for one tool subdir at a time, while trying not to break the build along the way. It is structured like this: - Patch 1-3: Trivial fixes to Makefiles for issues I discovered while changing the include paths. - Patch 4-8: Change the include directives to use the bpf/ prefix, and updates Makefiles to make sure tools/lib/ is part of the include path, but without removing tools/lib/bpf - Patch 9-10: Remove tools/lib/bpf from include paths to make sure we don't inadvertently re-introduce includes without the bpf/ prefix. Changelog: v4: - Move runqslower error on missing BTF into make rule - Make sure we don't always force a rebuild selftests - Rebase on latest bpf-next (dropping patch 11) v3: - Don't add the kernel build dir to the runqslower Makefile, pass it in from selftests instead. - Use libbpf's 'make install_headers' in selftests instead of trying to generate bpf_helper_defs.h in-place (to also work on read-only filesystems). - Use a scratch builddir for both libbpf and bpftool when building in selftests. - Revert bpf_helpers.h to quoted include instead of angled include with a bpf/ prefix. - Fix a few style nits from Andrii v2: - Do a full cleanup of libbpf includes instead of just changing the bpf_helper_defs.h include. --- Toke Høiland-Jørgensen (10): samples/bpf: Don't try to remove user's homedir on clean tools/bpf/runqslower: Fix override option for VMLINUX_BTF selftests: Pass VMLINUX_BTF to runqslower Makefile tools/runqslower: Use consistent include paths for libbpf selftests: Use consistent include paths for libbpf bpftool: Use consistent include paths for libbpf perf: Use consistent include paths for libbpf samples/bpf: Use consistent include paths for libbpf selftests: Remove tools/lib/bpf from include path tools/runqslower: Remove tools/lib/bpf from include path samples/bpf/Makefile | 5 +- samples/bpf/cpustat_kern.c | 2 - samples/bpf/fds_example.c | 2 - samples/bpf/hbm.c | 4 + samples/bpf/hbm_kern.h | 4 + samples/bpf/ibumad_kern.c | 2 - samples/bpf/ibumad_user.c | 2 - samples/bpf/lathist_kern.c | 2 - samples/bpf/lwt_len_hist_kern.c | 2 - samples/bpf/map_perf_test_kern.c | 4 + samples/bpf/offwaketime_kern.c | 4 + samples/bpf/offwaketime_user.c | 2 - samples/bpf/parse_ldabs.c | 2 - samples/bpf/parse_simple.c | 2 - samples/bpf/parse_varlen.c | 2 - samples/bpf/sampleip_kern.c | 4 + samples/bpf/sampleip_user.c | 2 - samples/bpf/sock_flags_kern.c | 2 - samples/bpf/sockex1_kern.c | 2 - samples/bpf/sockex1_user.c | 2 - samples/bpf/sockex2_kern.c | 2 - samples/bpf/sockex2_user.c | 2 - samples/bpf/sockex3_kern.c | 2 - samples/bpf/spintest_kern.c | 4 + samples/bpf/spintest_user.c | 2 - samples/bpf/syscall_tp_kern.c | 2 - samples/bpf/task_fd_query_kern.c | 2 - samples/bpf/task_fd_query_user.c | 2 - samples/bpf/tc_l2_redirect_kern.c | 2 - samples/bpf/tcbpf1_kern.c | 2 - samples/bpf/tcp_basertt_kern.c | 4 + samples/bpf/tcp_bufs_kern.c | 4 + samples/bpf/tcp_clamp_kern.c | 4 + samples/bpf/tcp_cong_kern.c | 4 + samples/bpf/tcp_dumpstats_kern.c | 4 + samples/bpf/tcp_iw_kern.c | 4 + samples/bpf/tcp_rwnd_kern.c | 4 + samples/bpf/tcp_synrto_kern.c | 4 + samples/bpf/tcp_tos_reflect_kern.c | 4 + samples/bpf/test_cgrp2_tc_kern.c | 2 - samples/bpf/test_current_task_under_cgroup_kern.c | 2 - samples/bpf/test_lwt_bpf.c | 2 - samples/bpf/test_map_in_map_kern.c | 4 + samples/bpf/test_overhead_kprobe_kern.c | 4 + samples/bpf/test_overhead_raw_tp_kern.c | 2 - samples/bpf/test_overhead_tp_kern.c | 2 - samples/bpf/test_probe_write_user_kern.c | 4 + samples/bpf/trace_event_kern.c | 4 + samples/bpf/trace_event_user.c | 2 - samples/bpf/trace_output_kern.c | 2 - samples/bpf/trace_output_user.c | 2 - samples/bpf/tracex1_kern.c | 4 + samples/bpf/tracex2_kern.c | 4 + samples/bpf/tracex3_kern.c | 4 + samples/bpf/tracex4_kern.c | 4 + samples/bpf/tracex5_kern.c | 4 + samples/bpf/tracex6_kern.c | 2 - samples/bpf/tracex7_kern.c | 2 - samples/bpf/xdp1_kern.c | 2 - samples/bpf/xdp1_user.c | 4 + samples/bpf/xdp2_kern.c | 2 - samples/bpf/xdp2skb_meta_kern.c | 2 - samples/bpf/xdp_adjust_tail_kern.c | 2 - samples/bpf/xdp_adjust_tail_user.c | 4 + samples/bpf/xdp_fwd_kern.c | 2 - samples/bpf/xdp_fwd_user.c | 2 - samples/bpf/xdp_monitor_kern.c | 2 - samples/bpf/xdp_redirect_cpu_kern.c | 2 - samples/bpf/xdp_redirect_cpu_user.c | 2 - samples/bpf/xdp_redirect_kern.c | 2 - samples/bpf/xdp_redirect_map_kern.c | 2 - samples/bpf/xdp_redirect_map_user.c | 2 - samples/bpf/xdp_redirect_user.c | 2 - samples/bpf/xdp_router_ipv4_kern.c | 2 - samples/bpf/xdp_router_ipv4_user.c | 2 - samples/bpf/xdp_rxq_info_kern.c | 2 - samples/bpf/xdp_rxq_info_user.c | 4 + samples/bpf/xdp_sample_pkts_kern.c | 2 - samples/bpf/xdp_sample_pkts_user.c | 2 - samples/bpf/xdp_tx_iptunnel_kern.c | 2 - samples/bpf/xdp_tx_iptunnel_user.c | 2 - samples/bpf/xdpsock_kern.c | 2 - samples/bpf/xdpsock_user.c | 6 +- tools/bpf/bpftool/Documentation/bpftool-gen.rst | 2 - tools/bpf/bpftool/Makefile | 2 - tools/bpf/bpftool/btf.c | 8 +-- tools/bpf/bpftool/btf_dumper.c | 2 - tools/bpf/bpftool/cgroup.c | 2 - tools/bpf/bpftool/common.c | 4 + tools/bpf/bpftool/feature.c | 4 + tools/bpf/bpftool/gen.c | 10 ++-- tools/bpf/bpftool/jit_disasm.c | 2 - tools/bpf/bpftool/main.c | 4 + tools/bpf/bpftool/map.c | 4 + tools/bpf/bpftool/map_perf_ring.c | 4 + tools/bpf/bpftool/net.c | 8 +-- tools/bpf/bpftool/netlink_dumper.c | 4 + tools/bpf/bpftool/perf.c | 2 - tools/bpf/bpftool/prog.c | 6 +- tools/bpf/bpftool/xlated_dumper.c | 2 - tools/bpf/runqslower/Makefile | 23 ++++---- tools/bpf/runqslower/runqslower.bpf.c | 2 - tools/bpf/runqslower/runqslower.c | 4 + tools/perf/examples/bpf/5sec.c | 2 - tools/perf/examples/bpf/empty.c | 2 - tools/perf/examples/bpf/sys_enter_openat.c | 2 - tools/perf/include/bpf/pid_filter.h | 2 - tools/perf/include/bpf/stdio.h | 2 - tools/perf/include/bpf/unistd.h | 2 - tools/testing/selftests/bpf/.gitignore | 2 - tools/testing/selftests/bpf/Makefile | 57 +++++++++++++------- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 4 + tools/testing/selftests/bpf/bpf_trace_helpers.h | 2 - tools/testing/selftests/bpf/bpf_util.h | 2 - tools/testing/selftests/bpf/prog_tests/cpu_mask.c | 2 - .../testing/selftests/bpf/prog_tests/perf_buffer.c | 2 - tools/testing/selftests/bpf/progs/bpf_dctcp.c | 4 + tools/testing/selftests/bpf/progs/bpf_flow.c | 4 + tools/testing/selftests/bpf/progs/connect4_prog.c | 4 + tools/testing/selftests/bpf/progs/connect6_prog.c | 4 + tools/testing/selftests/bpf/progs/dev_cgroup.c | 2 - tools/testing/selftests/bpf/progs/fentry_test.c | 2 - tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c | 2 - .../selftests/bpf/progs/fexit_bpf2bpf_simple.c | 2 - tools/testing/selftests/bpf/progs/fexit_test.c | 2 - .../selftests/bpf/progs/get_cgroup_id_kern.c | 2 - tools/testing/selftests/bpf/progs/kfree_skb.c | 4 + tools/testing/selftests/bpf/progs/loop1.c | 4 + tools/testing/selftests/bpf/progs/loop2.c | 4 + tools/testing/selftests/bpf/progs/loop3.c | 4 + tools/testing/selftests/bpf/progs/loop4.c | 2 - tools/testing/selftests/bpf/progs/loop5.c | 2 - tools/testing/selftests/bpf/progs/netcnt_prog.c | 2 - tools/testing/selftests/bpf/progs/pyperf.h | 2 - .../testing/selftests/bpf/progs/sample_map_ret0.c | 2 - tools/testing/selftests/bpf/progs/sendmsg4_prog.c | 4 + tools/testing/selftests/bpf/progs/sendmsg6_prog.c | 4 + .../selftests/bpf/progs/socket_cookie_prog.c | 4 + .../selftests/bpf/progs/sockmap_parse_prog.c | 4 + .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 4 + .../selftests/bpf/progs/sockmap_verdict_prog.c | 4 + .../testing/selftests/bpf/progs/sockopt_inherit.c | 2 - tools/testing/selftests/bpf/progs/sockopt_multi.c | 2 - tools/testing/selftests/bpf/progs/sockopt_sk.c | 2 - tools/testing/selftests/bpf/progs/strobemeta.h | 2 - tools/testing/selftests/bpf/progs/tailcall1.c | 2 - tools/testing/selftests/bpf/progs/tailcall2.c | 2 - tools/testing/selftests/bpf/progs/tailcall3.c | 2 - tools/testing/selftests/bpf/progs/tailcall4.c | 2 - tools/testing/selftests/bpf/progs/tailcall5.c | 2 - tools/testing/selftests/bpf/progs/tcp_rtt.c | 2 - .../testing/selftests/bpf/progs/test_adjust_tail.c | 2 - .../selftests/bpf/progs/test_attach_probe.c | 2 - tools/testing/selftests/bpf/progs/test_btf_haskv.c | 2 - tools/testing/selftests/bpf/progs/test_btf_newkv.c | 2 - tools/testing/selftests/bpf/progs/test_btf_nokv.c | 2 - .../testing/selftests/bpf/progs/test_core_extern.c | 2 - .../selftests/bpf/progs/test_core_reloc_arrays.c | 4 + .../bpf/progs/test_core_reloc_bitfields_direct.c | 4 + .../bpf/progs/test_core_reloc_bitfields_probed.c | 4 + .../bpf/progs/test_core_reloc_existence.c | 4 + .../selftests/bpf/progs/test_core_reloc_flavors.c | 4 + .../selftests/bpf/progs/test_core_reloc_ints.c | 4 + .../selftests/bpf/progs/test_core_reloc_kernel.c | 4 + .../selftests/bpf/progs/test_core_reloc_misc.c | 4 + .../selftests/bpf/progs/test_core_reloc_mods.c | 4 + .../selftests/bpf/progs/test_core_reloc_nesting.c | 4 + .../bpf/progs/test_core_reloc_primitives.c | 4 + .../bpf/progs/test_core_reloc_ptr_as_arr.c | 4 + .../selftests/bpf/progs/test_core_reloc_size.c | 4 + .../selftests/bpf/progs/test_get_stack_rawtp.c | 2 - .../testing/selftests/bpf/progs/test_global_data.c | 2 - .../selftests/bpf/progs/test_global_func1.c | 2 - .../selftests/bpf/progs/test_global_func3.c | 2 - .../selftests/bpf/progs/test_global_func5.c | 2 - .../selftests/bpf/progs/test_global_func6.c | 2 - .../selftests/bpf/progs/test_global_func7.c | 2 - tools/testing/selftests/bpf/progs/test_l4lb.c | 4 + .../selftests/bpf/progs/test_l4lb_noinline.c | 4 + .../selftests/bpf/progs/test_lirc_mode2_kern.c | 2 - .../selftests/bpf/progs/test_lwt_ip_encap.c | 4 + .../selftests/bpf/progs/test_lwt_seg6local.c | 4 + .../testing/selftests/bpf/progs/test_map_in_map.c | 2 - tools/testing/selftests/bpf/progs/test_map_lock.c | 2 - tools/testing/selftests/bpf/progs/test_mmap.c | 2 - tools/testing/selftests/bpf/progs/test_obj_id.c | 2 - tools/testing/selftests/bpf/progs/test_overhead.c | 4 + .../testing/selftests/bpf/progs/test_perf_buffer.c | 2 - tools/testing/selftests/bpf/progs/test_pinning.c | 2 - .../selftests/bpf/progs/test_pinning_invalid.c | 2 - .../testing/selftests/bpf/progs/test_pkt_access.c | 4 + .../selftests/bpf/progs/test_pkt_md_access.c | 2 - .../testing/selftests/bpf/progs/test_probe_user.c | 4 + .../selftests/bpf/progs/test_queue_stack_map.h | 2 - .../testing/selftests/bpf/progs/test_rdonly_maps.c | 2 - tools/testing/selftests/bpf/progs/test_seg6_loop.c | 4 + .../bpf/progs/test_select_reuseport_kern.c | 4 + .../selftests/bpf/progs/test_send_signal_kern.c | 2 - .../selftests/bpf/progs/test_sk_lookup_kern.c | 4 + .../selftests/bpf/progs/test_skb_cgroup_id_kern.c | 2 - tools/testing/selftests/bpf/progs/test_skb_ctx.c | 2 - tools/testing/selftests/bpf/progs/test_skeleton.c | 2 - .../selftests/bpf/progs/test_sock_fields_kern.c | 4 + tools/testing/selftests/bpf/progs/test_spin_lock.c | 2 - .../selftests/bpf/progs/test_stacktrace_build_id.c | 2 - .../selftests/bpf/progs/test_stacktrace_map.c | 2 - .../selftests/bpf/progs/test_sysctl_loop1.c | 2 - .../selftests/bpf/progs/test_sysctl_loop2.c | 2 - .../testing/selftests/bpf/progs/test_sysctl_prog.c | 2 - tools/testing/selftests/bpf/progs/test_tc_edt.c | 4 + tools/testing/selftests/bpf/progs/test_tc_tunnel.c | 4 + .../bpf/progs/test_tcp_check_syncookie_kern.c | 4 + .../testing/selftests/bpf/progs/test_tcp_estats.c | 2 - .../testing/selftests/bpf/progs/test_tcpbpf_kern.c | 4 + .../selftests/bpf/progs/test_tcpnotify_kern.c | 4 + .../testing/selftests/bpf/progs/test_tracepoint.c | 2 - .../testing/selftests/bpf/progs/test_tunnel_kern.c | 4 + .../selftests/bpf/progs/test_verif_scale1.c | 2 - .../selftests/bpf/progs/test_verif_scale2.c | 2 - .../selftests/bpf/progs/test_verif_scale3.c | 2 - tools/testing/selftests/bpf/progs/test_xdp.c | 4 + .../testing/selftests/bpf/progs/test_xdp_bpf2bpf.c | 2 - tools/testing/selftests/bpf/progs/test_xdp_loop.c | 4 + tools/testing/selftests/bpf/progs/test_xdp_meta.c | 2 - .../selftests/bpf/progs/test_xdp_noinline.c | 4 + .../selftests/bpf/progs/test_xdp_redirect.c | 2 - tools/testing/selftests/bpf/progs/test_xdp_vlan.c | 4 + tools/testing/selftests/bpf/progs/xdp_dummy.c | 2 - .../testing/selftests/bpf/progs/xdp_redirect_map.c | 2 - tools/testing/selftests/bpf/progs/xdp_tx.c | 2 - tools/testing/selftests/bpf/progs/xdping_kern.c | 4 + tools/testing/selftests/bpf/test_cpp.cpp | 6 +- tools/testing/selftests/bpf/test_hashmap.c | 2 - tools/testing/selftests/bpf/test_progs.h | 2 - tools/testing/selftests/bpf/test_sock.c | 2 - tools/testing/selftests/bpf/test_sockmap_kern.h | 4 + tools/testing/selftests/bpf/test_sysctl.c | 2 - tools/testing/selftests/bpf/trace_helpers.h | 2 - 238 files changed, 388 insertions(+), 369 deletions(-)

5 years, 5 months

2
19
0 0

[PATCH v2] selftests: vm: Fix 64-bit test builds for powerpc64le

by Sandipan Das

Some tests are built only for 64-bit systems. This makes sure that these tests are built for both big and little endian variants of powerpc64. Fixes: 7549b3364201 ("selftests: vm: Build/Run 64bit tests only on 64bit arch") Signed-off-by: Sandipan Das <sandipan(a)linux.ibm.com> --- Changelog: v2: - Added required changes in run_vmtests. --- tools/testing/selftests/vm/Makefile | 2 +- tools/testing/selftests/vm/run_vmtests | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index 7f9a8a8c31da..f3d11f4fca38 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -19,7 +19,7 @@ TEST_GEN_FILES += thuge-gen TEST_GEN_FILES += transhuge-stress TEST_GEN_FILES += userfaultfd -ifneq (,$(filter $(ARCH),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64)) +ifneq (,$(filter $(ARCH),arm64 ia64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sh64 sparc64 x86_64)) TEST_GEN_FILES += va_128TBswitch TEST_GEN_FILES += virtual_address_range endif diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests index a692ea828317..db8e0d1c7b39 100755 --- a/tools/testing/selftests/vm/run_vmtests +++ b/tools/testing/selftests/vm/run_vmtests @@ -59,7 +59,7 @@ else fi #filter 64bit architectures -ARCH64STR="arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64" +ARCH64STR="arm64 ia64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sh64 sparc64 x86_64" if [ -z $ARCH ]; then ARCH=`uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/'` fi -- 2.17.1

5 years, 5 months

2
1
0 0

[PATCH] selftests: vm: Fix 64-bit test builds for powerpc64le

by Sandipan Das

Some tests are built only for 64-bit systems. This makes sure that these tests are built for both big and little endian variants of powerpc64. Fixes: 7549b3364201 ("selftests: vm: Build/Run 64bit tests only on 64bit arch") Signed-off-by: Sandipan Das <sandipan(a)linux.ibm.com> --- tools/testing/selftests/vm/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index 7f9a8a8c31da..f3d11f4fca38 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -19,7 +19,7 @@ TEST_GEN_FILES += thuge-gen TEST_GEN_FILES += transhuge-stress TEST_GEN_FILES += userfaultfd -ifneq (,$(filter $(ARCH),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64)) +ifneq (,$(filter $(ARCH),arm64 ia64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sh64 sparc64 x86_64)) TEST_GEN_FILES += va_128TBswitch TEST_GEN_FILES += virtual_address_range endif -- 2.17.1

5 years, 5 months

1
0
0 0

[PATCH v3 0/2] openat2: minor uapi cleanups

by Aleksa Sarai

Patch changelog: v3: * Merge changes into the original patches to make Al's life easier. [Al Viro] v2: * Add include <linux/types.h> to openat2.h. [Florian Weimer] * Move OPEN_HOW_SIZE_* constants out of UAPI. [Florian Weimer] * Switch from __aligned_u64 to __u64 since it isn't necessary. [David Laight] v1: <https://lore.kernel.org/lkml/20191219105533.12508-1-cyphar@cyphar.com/> While openat2(2) is still not yet in Linus's tree, we can take this opportunity to iron out some small warts that weren't noticed earlier: * A fix was suggested by Florian Weimer, to separate the openat2 definitions so glibc can use the header directly. I've put the maintainership under VFS but let me know if you'd prefer it belong ot the fcntl folks. * Having heterogenous field sizes in an extensible struct results in "padding hole" problems when adding new fields (in addition the correct error to use for non-zero padding isn't entirely clear ). The simplest solution is to just copy clone(3)'s model -- always use u64s. It will waste a little more space in the struct, but it removes a possible future headache. This patch is intended to replace the corresponding patches in Al's #work.openat2 tree (and *will not* apply on Linus' tree). @Al: I will send some additional patches later, but they will require proper design review since they're ABI-related features (namely, adding a way to check what features a syscall supports as I outlined in my talk here[1]). [1]: https://youtu.be/ggD-eb3yPVs Aleksa Sarai (2): open: introduce openat2(2) syscall selftests: add openat2(2) selftests CREDITS | 4 +- MAINTAINERS | 1 + arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd.h | 2 +- arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/open.c | 147 +++-- include/linux/fcntl.h | 16 +- include/linux/syscalls.h | 3 + include/uapi/asm-generic/unistd.h | 5 +- include/uapi/linux/fcntl.h | 2 +- include/uapi/linux/openat2.h | 39 ++ tools/testing/selftests/Makefile | 1 + tools/testing/selftests/openat2/.gitignore | 1 + tools/testing/selftests/openat2/Makefile | 8 + tools/testing/selftests/openat2/helpers.c | 109 ++++ tools/testing/selftests/openat2/helpers.h | 106 ++++ .../testing/selftests/openat2/openat2_test.c | 312 +++++++++++ .../selftests/openat2/rename_attack_test.c | 160 ++++++ .../testing/selftests/openat2/resolve_test.c | 523 ++++++++++++++++++ 34 files changed, 1418 insertions(+), 39 deletions(-) create mode 100644 include/uapi/linux/openat2.h create mode 100644 tools/testing/selftests/openat2/.gitignore create mode 100644 tools/testing/selftests/openat2/Makefile create mode 100644 tools/testing/selftests/openat2/helpers.c create mode 100644 tools/testing/selftests/openat2/helpers.h create mode 100644 tools/testing/selftests/openat2/openat2_test.c create mode 100644 tools/testing/selftests/openat2/rename_attack_test.c create mode 100644 tools/testing/selftests/openat2/resolve_test.c -- 2.24.1

5 years, 5 months

2
6
0 0

[PATCH v16 00/23] selftests, powerpc, x86: Memory Protection Keys

by Sandipan Das

Memory protection keys enables an application to protect its address space from inadvertent access by its own code. This feature is now enabled on powerpc and has been available since 4.16-rc1. The patches move the selftests to arch neutral directory and enhance their test coverage. Tested on powerpc64 and x86_64 (Skylake-SP). Changelog --------- Link to previous version (v15): https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=149238 v16: (1) Rebased on top of latest master. (2) Switched to u64 instead of using an arch-dependent pkey_reg_t type for references to the pkey register based on suggestions from Dave, Michal and Michael. (3) Removed build time determination of page size based on suggestion from Michael. (4) Fixed comment before the definition of __page_o_noops() from patch 13 ("selftests/vm/pkeys: Introduce powerpc support"). v15: (1) Rebased on top of latest master. (2) Addressed review comments from Dave Hansen. (3) Moved code for getting or setting pkey bits to new helpers. These changes replace patch 7 of v14. (4) Added a fix which ensures that the correct count of reserved keys is used across different platforms. (5) Added a fix which ensures that the correct page size is used as powerpc supports both 4K and 64K pages. v14: (1) Incorporated another round of comments from Dave Hansen. v13: (1) Incorporated comments for Dave Hansen. (2) Added one more test for correct pkey-0 behavior. v12: (1) Fixed the offset of pkey field in the siginfo structure for x86_64 and powerpc. And tries to use the actual field if the headers have it defined. v11: (1) Fixed a deadlock in the ptrace testcase. v10 and prior: (1) Moved the testcase to arch neutral directory. (2) Split the changes into incremental patches. Desnes A. Nunes do Rosario (1): selftests/vm/pkeys: Fix number of reserved powerpc pkeys Ram Pai (17): selftests/x86/pkeys: Move selftests to arch-neutral directory selftests/vm: Rename all references to pkru to a generic name selftests/vm: Move generic definitions to header file selftests/vm: Typecast references to pkey register selftests/vm: Fix pkey_disable_clear() selftests/vm/pkeys: Fix assertion in pkey_disable_set/clear() selftests/vm/pkeys: Fix alloc_random_pkey() to make it really random selftests/vm/pkeys: Introduce generic pkey abstractions selftests/vm/pkeys: Introduce powerpc support selftests/vm/pkeys: Fix assertion in test_pkey_alloc_exhaust() selftests/vm/pkeys: Improve checks to determine pkey support selftests/vm/pkeys: Associate key on a mapped page and detect access violation selftests/vm/pkeys: Associate key on a mapped page and detect write violation selftests/vm/pkeys: Detect write violation on a mapped access-denied-key page selftests/vm/pkeys: Introduce a sub-page allocator selftests/vm/pkeys: Test correct behaviour of pkey-0 selftests/vm/pkeys: Override access right definitions on powerpc Sandipan Das (3): selftests: vm: pkeys: Add helpers for pkey bits selftests: vm: pkeys: Use the correct huge page size selftests: vm: pkeys: Use the correct page size on powerpc Thiago Jung Bauermann (2): selftests/vm: Move some definitions to arch-specific header selftests/vm: Make gcc check arguments of sigsafe_printf() tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/pkey-helpers.h | 225 ++++++ tools/testing/selftests/vm/pkey-powerpc.h | 136 ++++ tools/testing/selftests/vm/pkey-x86.h | 181 +++++ .../selftests/{x86 => vm}/protection_keys.c | 693 ++++++++++-------- tools/testing/selftests/x86/.gitignore | 1 - tools/testing/selftests/x86/pkey-helpers.h | 219 ------ 8 files changed, 927 insertions(+), 530 deletions(-) create mode 100644 tools/testing/selftests/vm/pkey-helpers.h create mode 100644 tools/testing/selftests/vm/pkey-powerpc.h create mode 100644 tools/testing/selftests/vm/pkey-x86.h rename tools/testing/selftests/{x86 => vm}/protection_keys.c (74%) delete mode 100644 tools/testing/selftests/x86/pkey-helpers.h -- 2.17.1

5 years, 5 months

2
25
0 0

[PATCH v4 6/6] selftests/cgroup: add tests for cloning into cgroups

by Christian Brauner

Expand the cgroup test-suite to include tests for CLONE_INTO_CGROUP. This adds the following tests: - CLONE_INTO_CGROUP manages to clone a process directly into a correctly delegated cgroup - CLONE_INTO_CGROUP fails to clone a process into a cgroup that has been removed after we've opened an fd to it - CLONE_INTO_CGROUP fails to clone a process into an invalid domain cgroup - CLONE_INTO_CGROUP adheres to the no internal process constraint - CLONE_INTO_CGROUP works with the freezer feature Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Shuah Khan <shuah(a)kernel.org> Cc: cgroups(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner(a)ubuntu.com> --- /* v1 */ Link: https://lore.kernel.org/r/20191218173516.7875-4-christian.brauner@ubuntu.com /* v2 */ Link: https://lore.kernel.org/r/20191223061504.28716-4-christian.brauner@ubuntu.c… unchanged /* v3 */ Link: https://lore.kernel.org/r/20200117002143.15559-6-christian.brauner@ubuntu.c… unchanged /* v3 */ unchanged --- tools/testing/selftests/cgroup/Makefile | 6 +- tools/testing/selftests/cgroup/cgroup_util.c | 126 ++++++++++++++++++ tools/testing/selftests/cgroup/cgroup_util.h | 4 + tools/testing/selftests/cgroup/test_core.c | 64 +++++++++ .../selftests/clone3/clone3_selftests.h | 19 ++- 5 files changed, 214 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/cgroup/Makefile b/tools/testing/selftests/cgroup/Makefile index 66aafe1f5746..967f268fde74 100644 --- a/tools/testing/selftests/cgroup/Makefile +++ b/tools/testing/selftests/cgroup/Makefile @@ -11,6 +11,6 @@ TEST_GEN_PROGS += test_freezer include ../lib.mk -$(OUTPUT)/test_memcontrol: cgroup_util.c -$(OUTPUT)/test_core: cgroup_util.c -$(OUTPUT)/test_freezer: cgroup_util.c +$(OUTPUT)/test_memcontrol: cgroup_util.c ../clone3/clone3_selftests.h +$(OUTPUT)/test_core: cgroup_util.c ../clone3/clone3_selftests.h +$(OUTPUT)/test_freezer: cgroup_util.c ../clone3/clone3_selftests.h diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 8f7131dcf1ff..8a637ca7d73a 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -15,6 +15,7 @@ #include <unistd.h> #include "cgroup_util.h" +#include "../clone3/clone3_selftests.h" static ssize_t read_text(const char *path, char *buf, size_t max_len) { @@ -331,12 +332,112 @@ int cg_run(const char *cgroup, } } +pid_t clone_into_cgroup(int cgroup_fd) +{ +#ifdef CLONE_ARGS_SIZE_VER2 + pid_t pid; + + struct clone_args args = { + .flags = CLONE_INTO_CGROUP, + .exit_signal = SIGCHLD, + .cgroup = cgroup_fd, + }; + + pid = sys_clone3(&args, sizeof(struct clone_args)); + /* + * Verify that this is a genuine test failure: + * ENOSYS -> clone3() not available + * E2BIG -> CLONE_INTO_CGROUP not available + */ + if (pid < 0 && (errno == ENOSYS || errno == E2BIG)) + goto pretend_enosys; + + return pid; + +pretend_enosys: +#endif + errno = ENOSYS; + return -ENOSYS; +} + +int clone_reap(pid_t pid, int options) +{ + int ret; + siginfo_t info = { + .si_signo = 0, + }; + +again: + ret = waitid(P_PID, pid, &info, options | __WALL | __WNOTHREAD); + if (ret < 0) { + if (errno == EINTR) + goto again; + return -1; + } + + if (options & WEXITED) { + if (WIFEXITED(info.si_status)) + return WEXITSTATUS(info.si_status); + } + + if (options & WSTOPPED) { + if (WIFSTOPPED(info.si_status)) + return WSTOPSIG(info.si_status); + } + + if (options & WCONTINUED) { + if (WIFCONTINUED(info.si_status)) + return 0; + } + + return -1; +} + +int dirfd_open_opath(const char *dir) +{ + return open(dir, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW | O_PATH); +} + +#define close_prot_errno(fd) \ + if (fd >= 0) { \ + int _e_ = errno; \ + close(fd); \ + errno = _e_; \ + } + +static int clone_into_cgroup_run_nowait(const char *cgroup, + int (*fn)(const char *cgroup, void *arg), + void *arg) +{ + int cgroup_fd; + pid_t pid; + + cgroup_fd = dirfd_open_opath(cgroup); + if (cgroup_fd < 0) + return -1; + + pid = clone_into_cgroup(cgroup_fd); + close_prot_errno(cgroup_fd); + if (pid == 0) + exit(fn(cgroup, arg)); + + return pid; +} + int cg_run_nowait(const char *cgroup, int (*fn)(const char *cgroup, void *arg), void *arg) { int pid; + pid = clone_into_cgroup_run_nowait(cgroup, fn, arg); + if (pid > 0) + return pid; + + /* Genuine test failure. */ + if (pid < 0 && errno != ENOSYS) + return -1; + pid = fork(); if (pid == 0) { char buf[64]; @@ -450,3 +551,28 @@ int proc_read_strstr(int pid, bool thread, const char *item, const char *needle) return strstr(buf, needle) ? 0 : -1; } + +int clone_into_cgroup_run_wait(const char *cgroup) +{ + int cgroup_fd; + pid_t pid; + + cgroup_fd = dirfd_open_opath(cgroup); + if (cgroup_fd < 0) + return -1; + + pid = clone_into_cgroup(cgroup_fd); + close_prot_errno(cgroup_fd); + if (pid < 0) + return -1; + + if (pid == 0) + exit(EXIT_SUCCESS); + + /* + * We don't care whether this fails. We only care whether the initial + * clone succeeded. + */ + (void)clone_reap(pid, WEXITED); + return 0; +} diff --git a/tools/testing/selftests/cgroup/cgroup_util.h b/tools/testing/selftests/cgroup/cgroup_util.h index 49c54fbdb229..5a1305dd1f0b 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.h +++ b/tools/testing/selftests/cgroup/cgroup_util.h @@ -50,3 +50,7 @@ extern int cg_wait_for_proc_count(const char *cgroup, int count); extern int cg_killall(const char *cgroup); extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); +extern pid_t clone_into_cgroup(int cgroup_fd); +extern int clone_reap(pid_t pid, int options); +extern int clone_into_cgroup_run_wait(const char *cgroup); +extern int dirfd_open_opath(const char *dir); diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index c5ca669feb2b..96e016ccafe0 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -25,8 +25,11 @@ static int test_cgcore_populated(const char *root) { int ret = KSFT_FAIL; + int err; char *cg_test_a = NULL, *cg_test_b = NULL; char *cg_test_c = NULL, *cg_test_d = NULL; + int cgroup_fd = -EBADF; + pid_t pid; cg_test_a = cg_name(root, "cg_test_a"); cg_test_b = cg_name(root, "cg_test_a/cg_test_b"); @@ -78,6 +81,52 @@ static int test_cgcore_populated(const char *root) if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n")) goto cleanup; + /* Test that we can directly clone into a new cgroup. */ + cgroup_fd = dirfd_open_opath(cg_test_d); + if (cgroup_fd < 0) + goto cleanup; + + pid = clone_into_cgroup(cgroup_fd); + if (pid < 0) { + if (errno == ENOSYS) + goto cleanup_pass; + goto cleanup; + } + + if (pid == 0) { + if (raise(SIGSTOP)) + exit(EXIT_FAILURE); + exit(EXIT_SUCCESS); + } + + err = cg_read_strcmp(cg_test_d, "cgroup.events", "populated 1\n"); + + (void)clone_reap(pid, WSTOPPED); + (void)kill(pid, SIGCONT); + (void)clone_reap(pid, WEXITED); + + if (err) + goto cleanup; + + if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n")) + goto cleanup; + + /* Remove cgroup. */ + if (cg_test_d) { + cg_destroy(cg_test_d); + free(cg_test_d); + cg_test_d = NULL; + } + + pid = clone_into_cgroup(cgroup_fd); + if (pid < 0) + goto cleanup_pass; + if (pid == 0) + exit(EXIT_SUCCESS); + (void)clone_reap(pid, WEXITED); + goto cleanup; + +cleanup_pass: ret = KSFT_PASS; cleanup: @@ -93,6 +142,8 @@ static int test_cgcore_populated(const char *root) free(cg_test_c); free(cg_test_b); free(cg_test_a); + if (cgroup_fd >= 0) + close(cgroup_fd); return ret; } @@ -136,6 +187,16 @@ static int test_cgcore_invalid_domain(const char *root) if (errno != EOPNOTSUPP) goto cleanup; + if (!clone_into_cgroup_run_wait(child)) + goto cleanup; + + if (errno == ENOSYS) + goto cleanup_pass; + + if (errno != EOPNOTSUPP) + goto cleanup; + +cleanup_pass: ret = KSFT_PASS; cleanup: @@ -345,6 +406,9 @@ static int test_cgcore_internal_process_constraint(const char *root) if (!cg_enter_current(parent)) goto cleanup; + if (!clone_into_cgroup_run_wait(parent)) + goto cleanup; + ret = KSFT_PASS; cleanup: diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h index a3f2c8ad8bcc..91c1a78ddb39 100644 --- a/tools/testing/selftests/clone3/clone3_selftests.h +++ b/tools/testing/selftests/clone3/clone3_selftests.h @@ -5,12 +5,24 @@ #define _GNU_SOURCE #include <sched.h> +#include <linux/sched.h> +#include <linux/types.h> #include <stdint.h> #include <syscall.h> -#include <linux/types.h> +#include <sys/wait.h> + +#include "../kselftest.h" #define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr))) +#ifndef CLONE_INTO_CGROUP +#define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */ +#endif + +#ifndef CLONE_ARGS_SIZE_VER0 +#define CLONE_ARGS_SIZE_VER0 64 +#endif + #ifndef __NR_clone3 #define __NR_clone3 -1 struct clone_args { @@ -22,10 +34,13 @@ struct clone_args { __aligned_u64 stack; __aligned_u64 stack_size; __aligned_u64 tls; +#define CLONE_ARGS_SIZE_VER1 80 __aligned_u64 set_tid; __aligned_u64 set_tid_size; +#define CLONE_ARGS_SIZE_VER2 88 + __aligned_u64 cgroup; }; -#endif +#endif /* __NR_clone3 */ static pid_t sys_clone3(struct clone_args *args, size_t size) { -- 2.25.0

5 years, 5 months

2
1
0 0

[PATCH bpf-next v3 00/11] tools: Use consistent libbpf include paths everywhere

by Toke Høiland-Jørgensen

The recent commit 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") broke compilation against libbpf if it is installed on the system, and $INCLUDEDIR/bpf is not in the include path. Since having the bpf/ subdir of $INCLUDEDIR in the include path has never been a requirement for building against libbpf before, this needs to be fixed. One option is to just revert the offending commit and figure out a different way to achieve what it aims for. However, this series takes a different approach: Changing all in-tree users of libbpf to consistently use a bpf/ prefix in #include directives for header files from libbpf. This turns out to be a somewhat invasive change in the number of files touched; however, the actual changes to files are fairly trivial (most of them are simply made with 'sed'). Also, this approach has the advantage that it makes external and internal users consistent with each other, and ensures no future changes breaks things in the same way as the commit referenced above. The series is split to make the change for one tool subdir at a time, while trying not to break the build along the way. It is structured like this: - Patch 1-3: Trivial fixes to Makefiles for issues I discovered while changing the include paths. - Patch 4-8: Change the include directives to use the bpf/ prefix, and updates Makefiles to make sure tools/lib/ is part of the include path, but without removing tools/lib/bpf - Patch 9-10: Remove tools/lib/bpf from include paths to make sure we don't inadvertently re-introduce includes without the bpf/ prefix. - Patch 11: Change the bpf_helpers.h file in libbpf itself back to using a quoted include for bpf_helper_defs.h (the original source of breakage). Changelog: v3: - Don't add the kernel build dir to the runqslower Makefile, pass it in from selftests instead. - Use libbpf's 'make install_headers' in selftests instead of trying to generate bpf_helper_defs.h in-place (to also work on read-only filesystems). - Use a scratch builddir for both libbpf and bpftool when building in selftests. - Revert bpf_helpers.h to quoted include instead of angled include with a bpf/ prefix. - Fix a few style nits from Andrii v2: - Do a full cleanup of libbpf includes instead of just changing the bpf_helper_defs.h include. --- Toke Høiland-Jørgensen (11): samples/bpf: Don't try to remove user's homedir on clean tools/bpf/runqslower: Fix override option for VMLINUX_BTF selftests: Pass VMLINUX_BTF to runqslower Makefile tools/runqslower: Use consistent include paths for libbpf selftests: Use consistent include paths for libbpf bpftool: Use consistent include paths for libbpf perf: Use consistent include paths for libbpf samples/bpf: Use consistent include paths for libbpf selftests: Remove tools/lib/bpf from include path tools/runqslower: Remove tools/lib/bpf from include path libbpf: Fix include of bpf_helpers.h when libbpf is installed on system samples/bpf/Makefile | 5 +- samples/bpf/cpustat_kern.c | 2 - samples/bpf/fds_example.c | 2 - samples/bpf/hbm.c | 4 +- samples/bpf/hbm_kern.h | 4 +- samples/bpf/ibumad_kern.c | 2 - samples/bpf/ibumad_user.c | 2 - samples/bpf/lathist_kern.c | 2 - samples/bpf/lwt_len_hist_kern.c | 2 - samples/bpf/map_perf_test_kern.c | 4 +- samples/bpf/offwaketime_kern.c | 4 +- samples/bpf/offwaketime_user.c | 2 - samples/bpf/parse_ldabs.c | 2 - samples/bpf/parse_simple.c | 2 - samples/bpf/parse_varlen.c | 2 - samples/bpf/sampleip_kern.c | 4 +- samples/bpf/sampleip_user.c | 2 - samples/bpf/sock_flags_kern.c | 2 - samples/bpf/sockex1_kern.c | 2 - samples/bpf/sockex1_user.c | 2 - samples/bpf/sockex2_kern.c | 2 - samples/bpf/sockex2_user.c | 2 - samples/bpf/sockex3_kern.c | 2 - samples/bpf/spintest_kern.c | 4 +- samples/bpf/spintest_user.c | 2 - samples/bpf/syscall_tp_kern.c | 2 - samples/bpf/task_fd_query_kern.c | 2 - samples/bpf/task_fd_query_user.c | 2 - samples/bpf/tc_l2_redirect_kern.c | 2 - samples/bpf/tcbpf1_kern.c | 2 - samples/bpf/tcp_basertt_kern.c | 4 +- samples/bpf/tcp_bufs_kern.c | 4 +- samples/bpf/tcp_clamp_kern.c | 4 +- samples/bpf/tcp_cong_kern.c | 4 +- samples/bpf/tcp_dumpstats_kern.c | 4 +- samples/bpf/tcp_iw_kern.c | 4 +- samples/bpf/tcp_rwnd_kern.c | 4 +- samples/bpf/tcp_synrto_kern.c | 4 +- samples/bpf/tcp_tos_reflect_kern.c | 4 +- samples/bpf/test_cgrp2_tc_kern.c | 2 - samples/bpf/test_current_task_under_cgroup_kern.c | 2 - samples/bpf/test_lwt_bpf.c | 2 - samples/bpf/test_map_in_map_kern.c | 4 +- samples/bpf/test_overhead_kprobe_kern.c | 4 +- samples/bpf/test_overhead_raw_tp_kern.c | 2 - samples/bpf/test_overhead_tp_kern.c | 2 - samples/bpf/test_probe_write_user_kern.c | 4 +- samples/bpf/trace_event_kern.c | 4 +- samples/bpf/trace_event_user.c | 2 - samples/bpf/trace_output_kern.c | 2 - samples/bpf/trace_output_user.c | 2 - samples/bpf/tracex1_kern.c | 4 +- samples/bpf/tracex2_kern.c | 4 +- samples/bpf/tracex3_kern.c | 4 +- samples/bpf/tracex4_kern.c | 4 +- samples/bpf/tracex5_kern.c | 4 +- samples/bpf/tracex6_kern.c | 2 - samples/bpf/tracex7_kern.c | 2 - samples/bpf/xdp1_kern.c | 2 - samples/bpf/xdp1_user.c | 4 +- samples/bpf/xdp2_kern.c | 2 - samples/bpf/xdp2skb_meta_kern.c | 2 - samples/bpf/xdp_adjust_tail_kern.c | 2 - samples/bpf/xdp_adjust_tail_user.c | 4 +- samples/bpf/xdp_fwd_kern.c | 2 - samples/bpf/xdp_fwd_user.c | 2 - samples/bpf/xdp_monitor_kern.c | 2 - samples/bpf/xdp_redirect_cpu_kern.c | 2 - samples/bpf/xdp_redirect_cpu_user.c | 2 - samples/bpf/xdp_redirect_kern.c | 2 - samples/bpf/xdp_redirect_map_kern.c | 2 - samples/bpf/xdp_redirect_map_user.c | 2 - samples/bpf/xdp_redirect_user.c | 2 - samples/bpf/xdp_router_ipv4_kern.c | 2 - samples/bpf/xdp_router_ipv4_user.c | 2 - samples/bpf/xdp_rxq_info_kern.c | 2 - samples/bpf/xdp_rxq_info_user.c | 4 +- samples/bpf/xdp_sample_pkts_kern.c | 2 - samples/bpf/xdp_sample_pkts_user.c | 2 - samples/bpf/xdp_tx_iptunnel_kern.c | 2 - samples/bpf/xdp_tx_iptunnel_user.c | 2 - samples/bpf/xdpsock_kern.c | 2 - samples/bpf/xdpsock_user.c | 6 +- tools/bpf/bpftool/Documentation/bpftool-gen.rst | 2 - tools/bpf/bpftool/Makefile | 2 - tools/bpf/bpftool/btf.c | 8 ++- tools/bpf/bpftool/btf_dumper.c | 2 - tools/bpf/bpftool/cgroup.c | 2 - tools/bpf/bpftool/common.c | 4 +- tools/bpf/bpftool/feature.c | 4 +- tools/bpf/bpftool/gen.c | 10 ++-- tools/bpf/bpftool/jit_disasm.c | 2 - tools/bpf/bpftool/main.c | 4 +- tools/bpf/bpftool/map.c | 4 +- tools/bpf/bpftool/map_perf_ring.c | 4 +- tools/bpf/bpftool/net.c | 8 ++- tools/bpf/bpftool/netlink_dumper.c | 4 +- tools/bpf/bpftool/perf.c | 2 - tools/bpf/bpftool/prog.c | 6 +- tools/bpf/bpftool/xlated_dumper.c | 2 - tools/bpf/runqslower/Makefile | 23 +++++---- tools/bpf/runqslower/runqslower.bpf.c | 2 - tools/bpf/runqslower/runqslower.c | 4 +- tools/lib/bpf/bpf_helpers.h | 2 - tools/perf/examples/bpf/5sec.c | 2 - tools/perf/examples/bpf/empty.c | 2 - tools/perf/examples/bpf/sys_enter_openat.c | 2 - tools/perf/include/bpf/pid_filter.h | 2 - tools/perf/include/bpf/stdio.h | 2 - tools/perf/include/bpf/unistd.h | 2 - tools/testing/selftests/bpf/.gitignore | 1 tools/testing/selftests/bpf/Makefile | 52 ++++++++++++-------- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 4 +- tools/testing/selftests/bpf/bpf_trace_helpers.h | 2 - tools/testing/selftests/bpf/bpf_util.h | 2 - tools/testing/selftests/bpf/prog_tests/cpu_mask.c | 2 - .../testing/selftests/bpf/prog_tests/perf_buffer.c | 2 - tools/testing/selftests/bpf/progs/bpf_dctcp.c | 2 - tools/testing/selftests/bpf/progs/bpf_flow.c | 4 +- tools/testing/selftests/bpf/progs/connect4_prog.c | 4 +- tools/testing/selftests/bpf/progs/connect6_prog.c | 4 +- tools/testing/selftests/bpf/progs/dev_cgroup.c | 2 - tools/testing/selftests/bpf/progs/fentry_test.c | 2 - tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c | 2 - .../selftests/bpf/progs/fexit_bpf2bpf_simple.c | 2 - tools/testing/selftests/bpf/progs/fexit_test.c | 2 - .../selftests/bpf/progs/get_cgroup_id_kern.c | 2 - tools/testing/selftests/bpf/progs/kfree_skb.c | 4 +- tools/testing/selftests/bpf/progs/loop1.c | 4 +- tools/testing/selftests/bpf/progs/loop2.c | 4 +- tools/testing/selftests/bpf/progs/loop3.c | 4 +- tools/testing/selftests/bpf/progs/loop4.c | 2 - tools/testing/selftests/bpf/progs/loop5.c | 2 - tools/testing/selftests/bpf/progs/netcnt_prog.c | 2 - tools/testing/selftests/bpf/progs/pyperf.h | 2 - .../testing/selftests/bpf/progs/sample_map_ret0.c | 2 - tools/testing/selftests/bpf/progs/sendmsg4_prog.c | 4 +- tools/testing/selftests/bpf/progs/sendmsg6_prog.c | 4 +- .../selftests/bpf/progs/socket_cookie_prog.c | 4 +- .../selftests/bpf/progs/sockmap_parse_prog.c | 4 +- .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 4 +- .../selftests/bpf/progs/sockmap_verdict_prog.c | 4 +- .../testing/selftests/bpf/progs/sockopt_inherit.c | 2 - tools/testing/selftests/bpf/progs/sockopt_multi.c | 2 - tools/testing/selftests/bpf/progs/sockopt_sk.c | 2 - tools/testing/selftests/bpf/progs/strobemeta.h | 2 - tools/testing/selftests/bpf/progs/tailcall1.c | 2 - tools/testing/selftests/bpf/progs/tailcall2.c | 2 - tools/testing/selftests/bpf/progs/tailcall3.c | 2 - tools/testing/selftests/bpf/progs/tailcall4.c | 2 - tools/testing/selftests/bpf/progs/tailcall5.c | 2 - tools/testing/selftests/bpf/progs/tcp_rtt.c | 2 - .../testing/selftests/bpf/progs/test_adjust_tail.c | 2 - .../selftests/bpf/progs/test_attach_probe.c | 2 - tools/testing/selftests/bpf/progs/test_btf_haskv.c | 2 - tools/testing/selftests/bpf/progs/test_btf_newkv.c | 2 - tools/testing/selftests/bpf/progs/test_btf_nokv.c | 2 - .../testing/selftests/bpf/progs/test_core_extern.c | 2 - .../selftests/bpf/progs/test_core_reloc_arrays.c | 4 +- .../bpf/progs/test_core_reloc_bitfields_direct.c | 4 +- .../bpf/progs/test_core_reloc_bitfields_probed.c | 4 +- .../bpf/progs/test_core_reloc_existence.c | 4 +- .../selftests/bpf/progs/test_core_reloc_flavors.c | 4 +- .../selftests/bpf/progs/test_core_reloc_ints.c | 4 +- .../selftests/bpf/progs/test_core_reloc_kernel.c | 4 +- .../selftests/bpf/progs/test_core_reloc_misc.c | 4 +- .../selftests/bpf/progs/test_core_reloc_mods.c | 4 +- .../selftests/bpf/progs/test_core_reloc_nesting.c | 4 +- .../bpf/progs/test_core_reloc_primitives.c | 4 +- .../bpf/progs/test_core_reloc_ptr_as_arr.c | 4 +- .../selftests/bpf/progs/test_core_reloc_size.c | 4 +- .../selftests/bpf/progs/test_get_stack_rawtp.c | 2 - .../testing/selftests/bpf/progs/test_global_data.c | 2 - .../selftests/bpf/progs/test_global_func1.c | 2 - .../selftests/bpf/progs/test_global_func3.c | 2 - .../selftests/bpf/progs/test_global_func5.c | 2 - .../selftests/bpf/progs/test_global_func6.c | 2 - .../selftests/bpf/progs/test_global_func7.c | 2 - tools/testing/selftests/bpf/progs/test_l4lb.c | 4 +- .../selftests/bpf/progs/test_l4lb_noinline.c | 4 +- .../selftests/bpf/progs/test_lirc_mode2_kern.c | 2 - .../selftests/bpf/progs/test_lwt_ip_encap.c | 4 +- .../selftests/bpf/progs/test_lwt_seg6local.c | 4 +- .../testing/selftests/bpf/progs/test_map_in_map.c | 2 - tools/testing/selftests/bpf/progs/test_map_lock.c | 2 - tools/testing/selftests/bpf/progs/test_mmap.c | 2 - tools/testing/selftests/bpf/progs/test_obj_id.c | 2 - tools/testing/selftests/bpf/progs/test_overhead.c | 4 +- .../testing/selftests/bpf/progs/test_perf_buffer.c | 2 - tools/testing/selftests/bpf/progs/test_pinning.c | 2 - .../selftests/bpf/progs/test_pinning_invalid.c | 2 - .../testing/selftests/bpf/progs/test_pkt_access.c | 4 +- .../selftests/bpf/progs/test_pkt_md_access.c | 2 - .../testing/selftests/bpf/progs/test_probe_user.c | 4 +- .../selftests/bpf/progs/test_queue_stack_map.h | 2 - .../testing/selftests/bpf/progs/test_rdonly_maps.c | 2 - tools/testing/selftests/bpf/progs/test_seg6_loop.c | 4 +- .../bpf/progs/test_select_reuseport_kern.c | 4 +- .../selftests/bpf/progs/test_send_signal_kern.c | 2 - .../selftests/bpf/progs/test_sk_lookup_kern.c | 4 +- .../selftests/bpf/progs/test_skb_cgroup_id_kern.c | 2 - tools/testing/selftests/bpf/progs/test_skb_ctx.c | 2 - tools/testing/selftests/bpf/progs/test_skeleton.c | 2 - .../selftests/bpf/progs/test_sock_fields_kern.c | 4 +- tools/testing/selftests/bpf/progs/test_spin_lock.c | 2 - .../selftests/bpf/progs/test_stacktrace_build_id.c | 2 - .../selftests/bpf/progs/test_stacktrace_map.c | 2 - .../selftests/bpf/progs/test_sysctl_loop1.c | 2 - .../selftests/bpf/progs/test_sysctl_loop2.c | 2 - .../testing/selftests/bpf/progs/test_sysctl_prog.c | 2 - tools/testing/selftests/bpf/progs/test_tc_edt.c | 4 +- tools/testing/selftests/bpf/progs/test_tc_tunnel.c | 4 +- .../bpf/progs/test_tcp_check_syncookie_kern.c | 4 +- .../testing/selftests/bpf/progs/test_tcp_estats.c | 2 - .../testing/selftests/bpf/progs/test_tcpbpf_kern.c | 4 +- .../selftests/bpf/progs/test_tcpnotify_kern.c | 4 +- .../testing/selftests/bpf/progs/test_tracepoint.c | 2 - .../testing/selftests/bpf/progs/test_tunnel_kern.c | 4 +- .../selftests/bpf/progs/test_verif_scale1.c | 2 - .../selftests/bpf/progs/test_verif_scale2.c | 2 - .../selftests/bpf/progs/test_verif_scale3.c | 2 - tools/testing/selftests/bpf/progs/test_xdp.c | 4 +- tools/testing/selftests/bpf/progs/test_xdp_loop.c | 4 +- tools/testing/selftests/bpf/progs/test_xdp_meta.c | 2 - .../selftests/bpf/progs/test_xdp_noinline.c | 4 +- .../selftests/bpf/progs/test_xdp_redirect.c | 2 - tools/testing/selftests/bpf/progs/test_xdp_vlan.c | 4 +- tools/testing/selftests/bpf/progs/xdp_dummy.c | 2 - .../testing/selftests/bpf/progs/xdp_redirect_map.c | 2 - tools/testing/selftests/bpf/progs/xdp_tx.c | 2 - tools/testing/selftests/bpf/progs/xdping_kern.c | 4 +- tools/testing/selftests/bpf/test_cpp.cpp | 6 +- tools/testing/selftests/bpf/test_hashmap.c | 2 - tools/testing/selftests/bpf/test_progs.h | 2 - tools/testing/selftests/bpf/test_sock.c | 2 - tools/testing/selftests/bpf/test_sockmap_kern.h | 4 +- tools/testing/selftests/bpf/test_sysctl.c | 2 - tools/testing/selftests/bpf/trace_helpers.h | 2 - 238 files changed, 381 insertions(+), 368 deletions(-)

5 years, 5 months

4
29
0 0

[PATCH] kselftest: Minimise dependency of get_size on C library interfaces

by Siddhesh Poyarekar

It was observed[1] on arm64 that __builtin_strlen led to an infinite loop in the get_size selftest. This is because __builtin_strlen (and other builtins) may sometimes result in a call to the C library function. The C library implementation of strlen uses an IFUNC resolver to load the most efficient strlen implementation for the underlying machine and hence has a PLT indirection even for static binaries. Because this binary avoids the C library startup routines, the PLT initialization never happens and hence the program gets stuck in an infinite loop. On x86_64 the __builtin_strlen just happens to expand inline and avoid the call but that is not always guaranteed. Further, while testing on x86_64 (Fedora 31), it was observed that the test also failed with a segfault inside write() because the generated code for the write function in glibc seems to access TLS before the syscall (probably due to the cancellation point check) and fails because TLS is not initialised. To mitigate these problems, this patch reduces the interface with the C library to just the syscall function. The syscall function still sets errno on failure, which is undesirable but for now it only affects cases where syscalls fail. [1] https://bugs.linaro.org/show_bug.cgi?id=5479 Signed-off-by: Siddhesh Poyarekar <siddhesh(a)gotplt.org> Reported-by: Masami Hiramatsu <masami.hiramatsu(a)linaro.org> --- tools/testing/selftests/size/get_size.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/size/get_size.c b/tools/testing/selftests/size/get_size.c index d4b59ab979a0..f55943b6d1e2 100644 --- a/tools/testing/selftests/size/get_size.c +++ b/tools/testing/selftests/size/get_size.c @@ -12,23 +12,35 @@ * own execution. It also attempts to have as few dependencies * on kernel features as possible. * - * It should be statically linked, with startup libs avoided. - * It uses no library calls, and only the following 3 syscalls: + * It should be statically linked, with startup libs avoided. It uses + * no library calls except the syscall() function for the following 3 + * syscalls: * sysinfo(), write(), and _exit() * * For output, it avoids printf (which in some C libraries * has large external dependencies) by implementing it's own * number output and print routines, and using __builtin_strlen() + * + * The test may crash if any of the above syscalls fails because in some + * libc implementations (e.g. the GNU C Library) errno is saved in + * thread-local storage, which does not get initialized due to avoiding + * startup libs. */ #include <sys/sysinfo.h> #include <unistd.h> +#include <sys/syscall.h> #define STDOUT_FILENO 1 static int print(const char *s) { - return write(STDOUT_FILENO, s, __builtin_strlen(s)); + size_t len = 0; + + while (s[len] != '\0') + len++; + + return syscall(SYS_write, STDOUT_FILENO, s, len); } static inline char *num_to_str(unsigned long num, char *buf, int len) @@ -80,12 +92,12 @@ void _start(void) print("TAP version 13\n"); print("# Testing system size.\n"); - ccode = sysinfo(&info); + ccode = syscall(SYS_sysinfo, &info); if (ccode < 0) { print("not ok 1"); print(test_name); print(" ---\n reason: \"could not get sysinfo\"\n ...\n"); - _exit(ccode); + syscall(SYS_exit, ccode); } print("ok 1"); print(test_name); @@ -101,5 +113,5 @@ void _start(void) print(" ...\n"); print("1..1\n"); - _exit(0); + syscall(SYS_exit, 0); } -- 2.24.1

5 years, 5 months

3
3
0 0

[PATCH v3 5/5] selftests/cgroup: add tests for cloning into cgroups

by Christian Brauner

Expand the cgroup test-suite to include tests for CLONE_INTO_CGROUP. This adds the following tests: - CLONE_INTO_CGROUP manages to clone a process directly into a correctly delegated cgroup - CLONE_INTO_CGROUP fails to clone a process into a cgroup that has been removed after we've opened an fd to it - CLONE_INTO_CGROUP fails to clone a process into an invalid domain cgroup - CLONE_INTO_CGROUP adheres to the no internal process constraint - CLONE_INTO_CGROUP works with the freezer feature Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Shuah Khan <shuah(a)kernel.org> Cc: cgroups(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner(a)ubuntu.com> --- /* v1 */ Link: https://lore.kernel.org/r/20191218173516.7875-4-christian.brauner@ubuntu.com /* v2 */ Link: https://lore.kernel.org/r/20191223061504.28716-4-christian.brauner@ubuntu.c… unchanged /* v3 */ unchanged --- tools/testing/selftests/cgroup/Makefile | 6 +- tools/testing/selftests/cgroup/cgroup_util.c | 126 ++++++++++++++++++ tools/testing/selftests/cgroup/cgroup_util.h | 4 + tools/testing/selftests/cgroup/test_core.c | 64 +++++++++ .../selftests/clone3/clone3_selftests.h | 19 ++- 5 files changed, 214 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/cgroup/Makefile b/tools/testing/selftests/cgroup/Makefile index 66aafe1f5746..967f268fde74 100644 --- a/tools/testing/selftests/cgroup/Makefile +++ b/tools/testing/selftests/cgroup/Makefile @@ -11,6 +11,6 @@ TEST_GEN_PROGS += test_freezer include ../lib.mk -$(OUTPUT)/test_memcontrol: cgroup_util.c -$(OUTPUT)/test_core: cgroup_util.c -$(OUTPUT)/test_freezer: cgroup_util.c +$(OUTPUT)/test_memcontrol: cgroup_util.c ../clone3/clone3_selftests.h +$(OUTPUT)/test_core: cgroup_util.c ../clone3/clone3_selftests.h +$(OUTPUT)/test_freezer: cgroup_util.c ../clone3/clone3_selftests.h diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 8f7131dcf1ff..8a637ca7d73a 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -15,6 +15,7 @@ #include <unistd.h> #include "cgroup_util.h" +#include "../clone3/clone3_selftests.h" static ssize_t read_text(const char *path, char *buf, size_t max_len) { @@ -331,12 +332,112 @@ int cg_run(const char *cgroup, } } +pid_t clone_into_cgroup(int cgroup_fd) +{ +#ifdef CLONE_ARGS_SIZE_VER2 + pid_t pid; + + struct clone_args args = { + .flags = CLONE_INTO_CGROUP, + .exit_signal = SIGCHLD, + .cgroup = cgroup_fd, + }; + + pid = sys_clone3(&args, sizeof(struct clone_args)); + /* + * Verify that this is a genuine test failure: + * ENOSYS -> clone3() not available + * E2BIG -> CLONE_INTO_CGROUP not available + */ + if (pid < 0 && (errno == ENOSYS || errno == E2BIG)) + goto pretend_enosys; + + return pid; + +pretend_enosys: +#endif + errno = ENOSYS; + return -ENOSYS; +} + +int clone_reap(pid_t pid, int options) +{ + int ret; + siginfo_t info = { + .si_signo = 0, + }; + +again: + ret = waitid(P_PID, pid, &info, options | __WALL | __WNOTHREAD); + if (ret < 0) { + if (errno == EINTR) + goto again; + return -1; + } + + if (options & WEXITED) { + if (WIFEXITED(info.si_status)) + return WEXITSTATUS(info.si_status); + } + + if (options & WSTOPPED) { + if (WIFSTOPPED(info.si_status)) + return WSTOPSIG(info.si_status); + } + + if (options & WCONTINUED) { + if (WIFCONTINUED(info.si_status)) + return 0; + } + + return -1; +} + +int dirfd_open_opath(const char *dir) +{ + return open(dir, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW | O_PATH); +} + +#define close_prot_errno(fd) \ + if (fd >= 0) { \ + int _e_ = errno; \ + close(fd); \ + errno = _e_; \ + } + +static int clone_into_cgroup_run_nowait(const char *cgroup, + int (*fn)(const char *cgroup, void *arg), + void *arg) +{ + int cgroup_fd; + pid_t pid; + + cgroup_fd = dirfd_open_opath(cgroup); + if (cgroup_fd < 0) + return -1; + + pid = clone_into_cgroup(cgroup_fd); + close_prot_errno(cgroup_fd); + if (pid == 0) + exit(fn(cgroup, arg)); + + return pid; +} + int cg_run_nowait(const char *cgroup, int (*fn)(const char *cgroup, void *arg), void *arg) { int pid; + pid = clone_into_cgroup_run_nowait(cgroup, fn, arg); + if (pid > 0) + return pid; + + /* Genuine test failure. */ + if (pid < 0 && errno != ENOSYS) + return -1; + pid = fork(); if (pid == 0) { char buf[64]; @@ -450,3 +551,28 @@ int proc_read_strstr(int pid, bool thread, const char *item, const char *needle) return strstr(buf, needle) ? 0 : -1; } + +int clone_into_cgroup_run_wait(const char *cgroup) +{ + int cgroup_fd; + pid_t pid; + + cgroup_fd = dirfd_open_opath(cgroup); + if (cgroup_fd < 0) + return -1; + + pid = clone_into_cgroup(cgroup_fd); + close_prot_errno(cgroup_fd); + if (pid < 0) + return -1; + + if (pid == 0) + exit(EXIT_SUCCESS); + + /* + * We don't care whether this fails. We only care whether the initial + * clone succeeded. + */ + (void)clone_reap(pid, WEXITED); + return 0; +} diff --git a/tools/testing/selftests/cgroup/cgroup_util.h b/tools/testing/selftests/cgroup/cgroup_util.h index 49c54fbdb229..5a1305dd1f0b 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.h +++ b/tools/testing/selftests/cgroup/cgroup_util.h @@ -50,3 +50,7 @@ extern int cg_wait_for_proc_count(const char *cgroup, int count); extern int cg_killall(const char *cgroup); extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); +extern pid_t clone_into_cgroup(int cgroup_fd); +extern int clone_reap(pid_t pid, int options); +extern int clone_into_cgroup_run_wait(const char *cgroup); +extern int dirfd_open_opath(const char *dir); diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index c5ca669feb2b..96e016ccafe0 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -25,8 +25,11 @@ static int test_cgcore_populated(const char *root) { int ret = KSFT_FAIL; + int err; char *cg_test_a = NULL, *cg_test_b = NULL; char *cg_test_c = NULL, *cg_test_d = NULL; + int cgroup_fd = -EBADF; + pid_t pid; cg_test_a = cg_name(root, "cg_test_a"); cg_test_b = cg_name(root, "cg_test_a/cg_test_b"); @@ -78,6 +81,52 @@ static int test_cgcore_populated(const char *root) if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n")) goto cleanup; + /* Test that we can directly clone into a new cgroup. */ + cgroup_fd = dirfd_open_opath(cg_test_d); + if (cgroup_fd < 0) + goto cleanup; + + pid = clone_into_cgroup(cgroup_fd); + if (pid < 0) { + if (errno == ENOSYS) + goto cleanup_pass; + goto cleanup; + } + + if (pid == 0) { + if (raise(SIGSTOP)) + exit(EXIT_FAILURE); + exit(EXIT_SUCCESS); + } + + err = cg_read_strcmp(cg_test_d, "cgroup.events", "populated 1\n"); + + (void)clone_reap(pid, WSTOPPED); + (void)kill(pid, SIGCONT); + (void)clone_reap(pid, WEXITED); + + if (err) + goto cleanup; + + if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n")) + goto cleanup; + + /* Remove cgroup. */ + if (cg_test_d) { + cg_destroy(cg_test_d); + free(cg_test_d); + cg_test_d = NULL; + } + + pid = clone_into_cgroup(cgroup_fd); + if (pid < 0) + goto cleanup_pass; + if (pid == 0) + exit(EXIT_SUCCESS); + (void)clone_reap(pid, WEXITED); + goto cleanup; + +cleanup_pass: ret = KSFT_PASS; cleanup: @@ -93,6 +142,8 @@ static int test_cgcore_populated(const char *root) free(cg_test_c); free(cg_test_b); free(cg_test_a); + if (cgroup_fd >= 0) + close(cgroup_fd); return ret; } @@ -136,6 +187,16 @@ static int test_cgcore_invalid_domain(const char *root) if (errno != EOPNOTSUPP) goto cleanup; + if (!clone_into_cgroup_run_wait(child)) + goto cleanup; + + if (errno == ENOSYS) + goto cleanup_pass; + + if (errno != EOPNOTSUPP) + goto cleanup; + +cleanup_pass: ret = KSFT_PASS; cleanup: @@ -345,6 +406,9 @@ static int test_cgcore_internal_process_constraint(const char *root) if (!cg_enter_current(parent)) goto cleanup; + if (!clone_into_cgroup_run_wait(parent)) + goto cleanup; + ret = KSFT_PASS; cleanup: diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h index a3f2c8ad8bcc..91c1a78ddb39 100644 --- a/tools/testing/selftests/clone3/clone3_selftests.h +++ b/tools/testing/selftests/clone3/clone3_selftests.h @@ -5,12 +5,24 @@ #define _GNU_SOURCE #include <sched.h> +#include <linux/sched.h> +#include <linux/types.h> #include <stdint.h> #include <syscall.h> -#include <linux/types.h> +#include <sys/wait.h> + +#include "../kselftest.h" #define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr))) +#ifndef CLONE_INTO_CGROUP +#define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */ +#endif + +#ifndef CLONE_ARGS_SIZE_VER0 +#define CLONE_ARGS_SIZE_VER0 64 +#endif + #ifndef __NR_clone3 #define __NR_clone3 -1 struct clone_args { @@ -22,10 +34,13 @@ struct clone_args { __aligned_u64 stack; __aligned_u64 stack_size; __aligned_u64 tls; +#define CLONE_ARGS_SIZE_VER1 80 __aligned_u64 set_tid; __aligned_u64 set_tid_size; +#define CLONE_ARGS_SIZE_VER2 88 + __aligned_u64 cgroup; }; -#endif +#endif /* __NR_clone3 */ static pid_t sys_clone3(struct clone_args *args, size_t size) { -- 2.25.0

5 years, 5 months

1
0
0 0

[PATCH v12 00/22] mm/gup: prereqs to track dma-pinned pages: FOLL_PIN

by John Hubbard

Hi, The "track FOLL_PIN pages" would have been the very next patch, but it is not included here because I'm still debugging a bug report from Leon. Let's get all of the prerequisite work (it's been reviewed) into the tree so that future reviews are easier. It's clear that any fixes that are required to the tracking patch, won't affect these patches here. This implements an API naming change (put_user_page*() --> unpin_user_page*()), and also adds FOLL_PIN page support, up to *but not including* actually tracking FOLL_PIN pages. It extends the FOLL_PIN support to a few select subsystems. More subsystems will be added in follow up work. Christoph Hellwig, a point of interest: a) I've moved the bulk of the code out of the inline functions, as requested, for the devmap changes (patch 4: "mm: devmap: refactor 1-based refcounting for ZONE_DEVICE pages"). Changes since v11: Fixes resulting from Kirill Shutemov's review, plus a fix for a kbuild robot-reported warning. * Only include the first 22 patches: up to, but not including, the "track FOLL_PIN pages" patch. * Improved the efficiency of put_compound_head(), by avoiding get_page() entirely, and instead doing the mass subtraction on one less than refs, followed by a final put_page(). * Got rid of the forward declaration of __gup_longterm_locked(), by moving get_user_pages_remote() further down in gup.c * Got rid of a redundant page_is_devmap_managed() call, and simplified put_devmap_managed_page() as part of that small cleanup. * Changed put_devmap_managed_page() to do an early out if the page is not devmap managed. This saves an indentation level. * Applied the same type of change to __unpin_devmap_managed_user_page(), which has the same checks. * Changed release_pages() to handle the changed put_devmap_managed_page() API. * Removed EXPORT_SYMBOL(free_devmap_managed_page), as it is not required, after the other refactoring. * Fixed a kbuild robot sparse warning: added "static" to try_pin_compound_head()'s declaration. There is a git repo and branch, for convenience: git@github.com:johnhubbard/linux.git pin_user_pages_tracking_v8 For the remaining list of "changes since version N", those are all in v11, which is here: https://lore.kernel.org/r/20191216222537.491123-1-jhubbard@nvidia.com ============================================================ Overview: This is a prerequisite to solving the problem of proper interactions between file-backed pages, and [R]DMA activities, as discussed in [1], [2], [3], and in a remarkable number of email threads since about 2017. :) A new internal gup flag, FOLL_PIN is introduced, and thoroughly documented in the last patch's Documentation/vm/pin_user_pages.rst. I believe that this will provide a good starting point for doing the layout lease work that Ira Weiny has been working on. That's because these new wrapper functions provide a clean, constrained, systematically named set of functionality that, again, is required in order to even know if a page is "dma-pinned". In contrast to earlier approaches, the page tracking can be incrementally applied to the kernel call sites that, until now, have been simply calling get_user_pages() ("gup"). In other words, opt-in by changing from this: get_user_pages() (sets FOLL_GET) put_page() to this: pin_user_pages() (sets FOLL_PIN) unpin_user_page() ============================================================ Testing: * I've done some overall kernel testing (LTP, and a few other goodies), and some directed testing to exercise some of the changes. And as you can see, gup_benchmark is enhanced to exercise this. Basically, I've been able to runtime test the core get_user_pages() and pin_user_pages() and related routines, but not so much on several of the call sites--but those are generally just a couple of lines changed, each. Not much of the kernel is actually using this, which on one hand reduces risk quite a lot. But on the other hand, testing coverage is low. So I'd love it if, in particular, the Infiniband and PowerPC folks could do a smoke test of this series for me. Runtime testing for the call sites so far is pretty light: * io_uring: Some directed tests from liburing exercise this, and they pass. * process_vm_access.c: A small directed test passes. * gup_benchmark: the enhanced version hits the new gup.c code, and passes. * infiniband: Ran rdma-core tests: rdma-core/build/bin/run_tests.py * VFIO: compiles (I'm vowing to set up a run time test soon, but it's not ready just yet) * powerpc: it compiles... * drm/via: compiles... * goldfish: compiles... * net/xdp: compiles... * media/v4l2: compiles... [1] Some slow progress on get_user_pages() (Apr 2, 2019): https://lwn.net/Articles/784574/ [2] DMA and get_user_pages() (LPC: Dec 12, 2018): https://lwn.net/Articles/774411/ [3] The trouble with get_user_pages() (Apr 30, 2018): https://lwn.net/Articles/753027/ Dan Williams (1): mm: Cleanup __put_devmap_managed_page() vs ->page_free() John Hubbard (21): mm/gup: factor out duplicate code from four routines mm/gup: move try_get_compound_head() to top, fix minor issues mm: devmap: refactor 1-based refcounting for ZONE_DEVICE pages goldish_pipe: rename local pin_user_pages() routine mm: fix get_user_pages_remote()'s handling of FOLL_LONGTERM vfio: fix FOLL_LONGTERM use, simplify get_user_pages_remote() call mm/gup: allow FOLL_FORCE for get_user_pages_fast() IB/umem: use get_user_pages_fast() to pin DMA pages media/v4l2-core: set pages dirty upon releasing DMA buffers mm/gup: introduce pin_user_pages*() and FOLL_PIN goldish_pipe: convert to pin_user_pages() and put_user_page() IB/{core,hw,umem}: set FOLL_PIN via pin_user_pages*(), fix up ODP mm/process_vm_access: set FOLL_PIN via pin_user_pages_remote() drm/via: set FOLL_PIN via pin_user_pages_fast() fs/io_uring: set FOLL_PIN via pin_user_pages() net/xdp: set FOLL_PIN via pin_user_pages() media/v4l2-core: pin_user_pages (FOLL_PIN) and put_user_page() conversion vfio, mm: pin_user_pages (FOLL_PIN) and put_user_page() conversion powerpc: book3s64: convert to pin_user_pages() and put_user_page() mm/gup_benchmark: use proper FOLL_WRITE flags instead of hard-coding "1" mm, tree-wide: rename put_user_page*() to unpin_user_page*() Documentation/core-api/index.rst | 1 + Documentation/core-api/pin_user_pages.rst | 232 +++++++++ arch/powerpc/mm/book3s64/iommu_api.c | 10 +- drivers/gpu/drm/via/via_dmablit.c | 6 +- drivers/infiniband/core/umem.c | 19 +- drivers/infiniband/core/umem_odp.c | 13 +- drivers/infiniband/hw/hfi1/user_pages.c | 4 +- drivers/infiniband/hw/mthca/mthca_memfree.c | 8 +- drivers/infiniband/hw/qib/qib_user_pages.c | 4 +- drivers/infiniband/hw/qib/qib_user_sdma.c | 8 +- drivers/infiniband/hw/usnic/usnic_uiom.c | 4 +- drivers/infiniband/sw/siw/siw_mem.c | 4 +- drivers/media/v4l2-core/videobuf-dma-sg.c | 8 +- drivers/nvdimm/pmem.c | 6 - drivers/platform/goldfish/goldfish_pipe.c | 35 +- drivers/vfio/vfio_iommu_type1.c | 35 +- fs/io_uring.c | 6 +- include/linux/mm.h | 95 +++- mm/gup.c | 495 ++++++++++++-------- mm/gup_benchmark.c | 9 +- mm/memremap.c | 75 ++- mm/process_vm_access.c | 28 +- mm/swap.c | 27 +- net/xdp/xdp_umem.c | 4 +- tools/testing/selftests/vm/gup_benchmark.c | 6 +- 25 files changed, 762 insertions(+), 380 deletions(-) create mode 100644 Documentation/core-api/pin_user_pages.rst -- 2.24.1

5 years, 5 months

3
35
0 0

[PATCH][next] selftests: fix spelling mistake "chainged" -> "chained"

by Colin King

From: Colin Ian King <colin.king(a)canonical.com> There is a spelling mistake in a literal string, fix it. Signed-off-by: Colin Ian King <colin.king(a)canonical.com> --- tools/testing/selftests/openat2/resolve_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/openat2/resolve_test.c b/tools/testing/selftests/openat2/resolve_test.c index 7a94b1da8e7b..bbafad440893 100644 --- a/tools/testing/selftests/openat2/resolve_test.c +++ b/tools/testing/selftests/openat2/resolve_test.c @@ -230,7 +230,7 @@ void test_openat2_opath_tests(void) { .name = "[in_root] garbage link to /root", .path = "cheeky/garbageself", .how.resolve = RESOLVE_IN_ROOT, .out.path = "root", .pass = true }, - { .name = "[in_root] chainged garbage links to /root", + { .name = "[in_root] chained garbage links to /root", .path = "abscheeky/garbageself", .how.resolve = RESOLVE_IN_ROOT, .out.path = "root", .pass = true }, { .name = "[in_root] relative path to 'root'", -- 2.24.0

5 years, 5 months

3
2
0 0

Re: [PATCH v9 00/13] selftests/resctrl: Add resctrl selftest

by Thomas Gleixner

Fenghua Yu <fenghua.yu(a)intel.com> writes: > > Hi, Boris, Thomas, Ingo, et al, > > Any comment on this patch set? No objections from my side, but you forgot to CC the relevant maintainer/mailinglist for tools/testing/selftests/. CC'ed now. Thanks, tglx

5 years, 5 months

2
1
0 0

[PATCH AUTOSEL 4.14 165/371] selftests/ipc: Fix msgque compiler warnings

by Sasha Levin

From: Kees Cook <keescook(a)chromium.org> [ Upstream commit a147faa96f832f76e772b1e448e94ea84c774081 ] This fixes the various compiler warnings when building the msgque selftest. The primary change is using sys/msg.h instead of linux/msg.h directly to gain the API declarations. Fixes: 3a665531a3b7 ("selftests: IPC message queue copy feature test") Signed-off-by: Kees Cook <keescook(a)chromium.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/ipc/msgque.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c index ee9382bdfadc..c5587844fbb8 100644 --- a/tools/testing/selftests/ipc/msgque.c +++ b/tools/testing/selftests/ipc/msgque.c @@ -1,9 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> -#include <linux/msg.h> +#include <sys/msg.h> #include <fcntl.h> #include "../kselftest.h" @@ -73,7 +74,7 @@ int restore_queue(struct msgque_data *msgque) return 0; destroy: - if (msgctl(id, IPC_RMID, 0)) + if (msgctl(id, IPC_RMID, NULL)) printf("Failed to destroy queue: %d\n", -errno); return ret; } @@ -120,7 +121,7 @@ int check_and_destroy_queue(struct msgque_data *msgque) ret = 0; err: - if (msgctl(msgque->msq_id, IPC_RMID, 0)) { + if (msgctl(msgque->msq_id, IPC_RMID, NULL)) { printf("Failed to destroy queue: %d\n", -errno); return -errno; } @@ -129,7 +130,7 @@ int check_and_destroy_queue(struct msgque_data *msgque) int dump_queue(struct msgque_data *msgque) { - struct msqid64_ds ds; + struct msqid_ds ds; int kern_id; int i, ret; @@ -246,7 +247,7 @@ int main(int argc, char **argv) return ksft_exit_pass(); err_destroy: - if (msgctl(msgque.msq_id, IPC_RMID, 0)) { + if (msgctl(msgque.msq_id, IPC_RMID, NULL)) { printf("Failed to destroy queue: %d\n", -errno); return ksft_exit_fail(); } -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH bpf-next v2 00/10] tools: Use consistent libbpf include paths everywhere

by Toke Høiland-Jørgensen

The recent commit 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") broke compilation against libbpf if it is installed on the system, and $INCLUDEDIR/bpf is not in the include path. Since having the bpf/ subdir of $INCLUDEDIR in the include path has never been a requirement for building against libbpf before, this needs to be fixed. One option is to just revert the offending commit and figure out a different way to achieve what it aims for. However, this series takes a different approach: Changing all in-tree users of libbpf to consistently use a bpf/ prefix in #include directives for header files from libbpf. This turns out to be a somewhat invasive change in the number of files touched; however, the actual changes to files are fairly trivial (most of them are simply made with 'sed'). Also, this approach has the advantage that it makes external and internal users consistent with each other, and ensures no future changes breaks things in the same way as the commit referenced above. The series is split to make the change for one tool subdir at a time, while trying not to break the build along the way. It is structured like this: - Patch 1-2: Trivial fixes to Makefiles for issues I discovered while changing the include paths. - Patch 3-7: Change the include directives to use the bpf/ prefix, and updates Makefiles to make sure tools/lib/ is part of the include path, but without removing tools/lib/bpf - Patch 8: Change the bpf_helpers file in libbpf itself to use the bpf/ prefix when including (the original source of breakage). - Patch 9-10: Remove tools/lib/bpf from include paths to make sure we don't inadvertently re-introduce includes without the bpf/ prefix. --- Toke Høiland-Jørgensen (10): samples/bpf: Don't try to remove user's homedir on clean tools/bpf/runqslower: Fix override option for VMLINUX_BTF tools/runqslower: Use consistent include paths for libbpf selftests: Use consistent include paths for libbpf bpftool: Use consistent include paths for libbpf perf: Use consistent include paths for libbpf samples/bpf: Use consistent include paths for libbpf libbpf: Fix include of bpf_helpers.h when libbpf is installed on system selftests: Remove tools/lib/bpf from include path tools/runqslower: Remove tools/lib/bpf from include path samples/bpf/Makefile | 5 ++--- samples/bpf/cpustat_kern.c | 2 +- samples/bpf/fds_example.c | 2 +- samples/bpf/hbm.c | 4 ++-- samples/bpf/hbm_kern.h | 4 ++-- samples/bpf/ibumad_kern.c | 2 +- samples/bpf/ibumad_user.c | 2 +- samples/bpf/lathist_kern.c | 2 +- samples/bpf/lwt_len_hist_kern.c | 2 +- samples/bpf/map_perf_test_kern.c | 4 ++-- samples/bpf/offwaketime_kern.c | 4 ++-- samples/bpf/offwaketime_user.c | 2 +- samples/bpf/parse_ldabs.c | 2 +- samples/bpf/parse_simple.c | 2 +- samples/bpf/parse_varlen.c | 2 +- samples/bpf/sampleip_kern.c | 4 ++-- samples/bpf/sampleip_user.c | 2 +- samples/bpf/sock_flags_kern.c | 2 +- samples/bpf/sockex1_kern.c | 2 +- samples/bpf/sockex1_user.c | 2 +- samples/bpf/sockex2_kern.c | 2 +- samples/bpf/sockex2_user.c | 2 +- samples/bpf/sockex3_kern.c | 2 +- samples/bpf/spintest_kern.c | 4 ++-- samples/bpf/spintest_user.c | 2 +- samples/bpf/syscall_tp_kern.c | 2 +- samples/bpf/task_fd_query_kern.c | 2 +- samples/bpf/task_fd_query_user.c | 2 +- samples/bpf/tc_l2_redirect_kern.c | 2 +- samples/bpf/tcbpf1_kern.c | 2 +- samples/bpf/tcp_basertt_kern.c | 4 ++-- samples/bpf/tcp_bufs_kern.c | 4 ++-- samples/bpf/tcp_clamp_kern.c | 4 ++-- samples/bpf/tcp_cong_kern.c | 4 ++-- samples/bpf/tcp_dumpstats_kern.c | 4 ++-- samples/bpf/tcp_iw_kern.c | 4 ++-- samples/bpf/tcp_rwnd_kern.c | 4 ++-- samples/bpf/tcp_synrto_kern.c | 4 ++-- samples/bpf/tcp_tos_reflect_kern.c | 4 ++-- samples/bpf/test_cgrp2_tc_kern.c | 2 +- samples/bpf/test_current_task_under_cgroup_kern.c | 2 +- samples/bpf/test_lwt_bpf.c | 2 +- samples/bpf/test_map_in_map_kern.c | 4 ++-- samples/bpf/test_overhead_kprobe_kern.c | 4 ++-- samples/bpf/test_overhead_raw_tp_kern.c | 2 +- samples/bpf/test_overhead_tp_kern.c | 2 +- samples/bpf/test_probe_write_user_kern.c | 4 ++-- samples/bpf/trace_event_kern.c | 4 ++-- samples/bpf/trace_event_user.c | 2 +- samples/bpf/trace_output_kern.c | 2 +- samples/bpf/trace_output_user.c | 2 +- samples/bpf/tracex1_kern.c | 4 ++-- samples/bpf/tracex2_kern.c | 4 ++-- samples/bpf/tracex3_kern.c | 4 ++-- samples/bpf/tracex4_kern.c | 4 ++-- samples/bpf/tracex5_kern.c | 4 ++-- samples/bpf/tracex6_kern.c | 2 +- samples/bpf/tracex7_kern.c | 2 +- samples/bpf/xdp1_kern.c | 2 +- samples/bpf/xdp1_user.c | 4 ++-- samples/bpf/xdp2_kern.c | 2 +- samples/bpf/xdp2skb_meta_kern.c | 2 +- samples/bpf/xdp_adjust_tail_kern.c | 2 +- samples/bpf/xdp_adjust_tail_user.c | 4 ++-- samples/bpf/xdp_fwd_kern.c | 2 +- samples/bpf/xdp_fwd_user.c | 2 +- samples/bpf/xdp_monitor_kern.c | 2 +- samples/bpf/xdp_redirect_cpu_kern.c | 2 +- samples/bpf/xdp_redirect_cpu_user.c | 2 +- samples/bpf/xdp_redirect_kern.c | 2 +- samples/bpf/xdp_redirect_map_kern.c | 2 +- samples/bpf/xdp_redirect_map_user.c | 2 +- samples/bpf/xdp_redirect_user.c | 2 +- samples/bpf/xdp_router_ipv4_kern.c | 2 +- samples/bpf/xdp_router_ipv4_user.c | 2 +- samples/bpf/xdp_rxq_info_kern.c | 2 +- samples/bpf/xdp_rxq_info_user.c | 4 ++-- samples/bpf/xdp_sample_pkts_kern.c | 2 +- samples/bpf/xdp_sample_pkts_user.c | 2 +- samples/bpf/xdp_tx_iptunnel_kern.c | 2 +- samples/bpf/xdp_tx_iptunnel_user.c | 2 +- samples/bpf/xdpsock_kern.c | 2 +- samples/bpf/xdpsock_user.c | 6 +++--- tools/bpf/bpftool/Documentation/bpftool-gen.rst | 2 +- tools/bpf/bpftool/Makefile | 2 +- tools/bpf/bpftool/btf.c | 8 ++++---- tools/bpf/bpftool/btf_dumper.c | 2 +- tools/bpf/bpftool/cgroup.c | 2 +- tools/bpf/bpftool/common.c | 4 ++-- tools/bpf/bpftool/feature.c | 4 ++-- tools/bpf/bpftool/gen.c | 10 +++++----- tools/bpf/bpftool/jit_disasm.c | 2 +- tools/bpf/bpftool/main.c | 4 ++-- tools/bpf/bpftool/map.c | 4 ++-- tools/bpf/bpftool/map_perf_ring.c | 4 ++-- tools/bpf/bpftool/net.c | 8 ++++---- tools/bpf/bpftool/netlink_dumper.c | 4 ++-- tools/bpf/bpftool/perf.c | 2 +- tools/bpf/bpftool/prog.c | 6 +++--- tools/bpf/bpftool/xlated_dumper.c | 2 +- tools/bpf/runqslower/Makefile | 21 ++++++++++++-------- tools/bpf/runqslower/runqslower.bpf.c | 2 +- tools/bpf/runqslower/runqslower.c | 4 ++-- tools/lib/bpf/bpf_helpers.h | 2 +- tools/perf/examples/bpf/5sec.c | 2 +- tools/perf/examples/bpf/empty.c | 2 +- tools/perf/examples/bpf/sys_enter_openat.c | 2 +- tools/perf/include/bpf/pid_filter.h | 2 +- tools/perf/include/bpf/stdio.h | 2 +- tools/perf/include/bpf/unistd.h | 2 +- tools/testing/selftests/bpf/.gitignore | 3 ++- tools/testing/selftests/bpf/Makefile | 16 ++++++++------- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 4 ++-- tools/testing/selftests/bpf/bpf_trace_helpers.h | 2 +- tools/testing/selftests/bpf/bpf_util.h | 2 +- tools/testing/selftests/bpf/prog_tests/cpu_mask.c | 2 +- .../testing/selftests/bpf/prog_tests/perf_buffer.c | 2 +- tools/testing/selftests/bpf/progs/bpf_dctcp.c | 2 +- tools/testing/selftests/bpf/progs/bpf_flow.c | 4 ++-- tools/testing/selftests/bpf/progs/connect4_prog.c | 4 ++-- tools/testing/selftests/bpf/progs/connect6_prog.c | 4 ++-- tools/testing/selftests/bpf/progs/dev_cgroup.c | 2 +- tools/testing/selftests/bpf/progs/fentry_test.c | 2 +- tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c | 2 +- .../selftests/bpf/progs/fexit_bpf2bpf_simple.c | 2 +- tools/testing/selftests/bpf/progs/fexit_test.c | 2 +- .../selftests/bpf/progs/get_cgroup_id_kern.c | 2 +- tools/testing/selftests/bpf/progs/kfree_skb.c | 4 ++-- tools/testing/selftests/bpf/progs/loop1.c | 4 ++-- tools/testing/selftests/bpf/progs/loop2.c | 4 ++-- tools/testing/selftests/bpf/progs/loop3.c | 4 ++-- tools/testing/selftests/bpf/progs/loop4.c | 2 +- tools/testing/selftests/bpf/progs/loop5.c | 2 +- tools/testing/selftests/bpf/progs/netcnt_prog.c | 2 +- tools/testing/selftests/bpf/progs/pyperf.h | 2 +- .../testing/selftests/bpf/progs/sample_map_ret0.c | 2 +- tools/testing/selftests/bpf/progs/sendmsg4_prog.c | 4 ++-- tools/testing/selftests/bpf/progs/sendmsg6_prog.c | 4 ++-- .../selftests/bpf/progs/socket_cookie_prog.c | 4 ++-- .../selftests/bpf/progs/sockmap_parse_prog.c | 4 ++-- .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 4 ++-- .../selftests/bpf/progs/sockmap_verdict_prog.c | 4 ++-- .../testing/selftests/bpf/progs/sockopt_inherit.c | 2 +- tools/testing/selftests/bpf/progs/sockopt_multi.c | 2 +- tools/testing/selftests/bpf/progs/sockopt_sk.c | 2 +- tools/testing/selftests/bpf/progs/strobemeta.h | 2 +- tools/testing/selftests/bpf/progs/tailcall1.c | 2 +- tools/testing/selftests/bpf/progs/tailcall2.c | 2 +- tools/testing/selftests/bpf/progs/tailcall3.c | 2 +- tools/testing/selftests/bpf/progs/tailcall4.c | 2 +- tools/testing/selftests/bpf/progs/tailcall5.c | 2 +- tools/testing/selftests/bpf/progs/tcp_rtt.c | 2 +- .../testing/selftests/bpf/progs/test_adjust_tail.c | 2 +- .../selftests/bpf/progs/test_attach_probe.c | 2 +- tools/testing/selftests/bpf/progs/test_btf_haskv.c | 2 +- tools/testing/selftests/bpf/progs/test_btf_newkv.c | 2 +- tools/testing/selftests/bpf/progs/test_btf_nokv.c | 2 +- .../testing/selftests/bpf/progs/test_core_extern.c | 2 +- .../selftests/bpf/progs/test_core_reloc_arrays.c | 4 ++-- .../bpf/progs/test_core_reloc_bitfields_direct.c | 4 ++-- .../bpf/progs/test_core_reloc_bitfields_probed.c | 4 ++-- .../bpf/progs/test_core_reloc_existence.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_flavors.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_ints.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_kernel.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_misc.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_mods.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_nesting.c | 4 ++-- .../bpf/progs/test_core_reloc_primitives.c | 4 ++-- .../bpf/progs/test_core_reloc_ptr_as_arr.c | 4 ++-- .../selftests/bpf/progs/test_core_reloc_size.c | 4 ++-- .../selftests/bpf/progs/test_get_stack_rawtp.c | 2 +- .../testing/selftests/bpf/progs/test_global_data.c | 2 +- .../selftests/bpf/progs/test_global_func1.c | 2 +- .../selftests/bpf/progs/test_global_func3.c | 2 +- .../selftests/bpf/progs/test_global_func5.c | 2 +- .../selftests/bpf/progs/test_global_func6.c | 2 +- .../selftests/bpf/progs/test_global_func7.c | 2 +- tools/testing/selftests/bpf/progs/test_l4lb.c | 4 ++-- .../selftests/bpf/progs/test_l4lb_noinline.c | 4 ++-- .../selftests/bpf/progs/test_lirc_mode2_kern.c | 2 +- .../selftests/bpf/progs/test_lwt_ip_encap.c | 4 ++-- .../selftests/bpf/progs/test_lwt_seg6local.c | 4 ++-- .../testing/selftests/bpf/progs/test_map_in_map.c | 2 +- tools/testing/selftests/bpf/progs/test_map_lock.c | 2 +- tools/testing/selftests/bpf/progs/test_mmap.c | 2 +- tools/testing/selftests/bpf/progs/test_obj_id.c | 2 +- tools/testing/selftests/bpf/progs/test_overhead.c | 4 ++-- .../testing/selftests/bpf/progs/test_perf_buffer.c | 2 +- tools/testing/selftests/bpf/progs/test_pinning.c | 2 +- .../selftests/bpf/progs/test_pinning_invalid.c | 2 +- .../testing/selftests/bpf/progs/test_pkt_access.c | 4 ++-- .../selftests/bpf/progs/test_pkt_md_access.c | 2 +- .../testing/selftests/bpf/progs/test_probe_user.c | 4 ++-- .../selftests/bpf/progs/test_queue_stack_map.h | 2 +- .../testing/selftests/bpf/progs/test_rdonly_maps.c | 2 +- tools/testing/selftests/bpf/progs/test_seg6_loop.c | 4 ++-- .../bpf/progs/test_select_reuseport_kern.c | 4 ++-- .../selftests/bpf/progs/test_send_signal_kern.c | 2 +- .../selftests/bpf/progs/test_sk_lookup_kern.c | 4 ++-- .../selftests/bpf/progs/test_skb_cgroup_id_kern.c | 2 +- tools/testing/selftests/bpf/progs/test_skb_ctx.c | 2 +- tools/testing/selftests/bpf/progs/test_skeleton.c | 2 +- .../selftests/bpf/progs/test_sock_fields_kern.c | 4 ++-- tools/testing/selftests/bpf/progs/test_spin_lock.c | 2 +- .../selftests/bpf/progs/test_stacktrace_build_id.c | 2 +- .../selftests/bpf/progs/test_stacktrace_map.c | 2 +- .../selftests/bpf/progs/test_sysctl_loop1.c | 2 +- .../selftests/bpf/progs/test_sysctl_loop2.c | 2 +- .../testing/selftests/bpf/progs/test_sysctl_prog.c | 2 +- tools/testing/selftests/bpf/progs/test_tc_edt.c | 4 ++-- tools/testing/selftests/bpf/progs/test_tc_tunnel.c | 4 ++-- .../bpf/progs/test_tcp_check_syncookie_kern.c | 4 ++-- .../testing/selftests/bpf/progs/test_tcp_estats.c | 2 +- .../testing/selftests/bpf/progs/test_tcpbpf_kern.c | 4 ++-- .../selftests/bpf/progs/test_tcpnotify_kern.c | 4 ++-- .../testing/selftests/bpf/progs/test_tracepoint.c | 2 +- .../testing/selftests/bpf/progs/test_tunnel_kern.c | 4 ++-- .../selftests/bpf/progs/test_verif_scale1.c | 2 +- .../selftests/bpf/progs/test_verif_scale2.c | 2 +- .../selftests/bpf/progs/test_verif_scale3.c | 2 +- tools/testing/selftests/bpf/progs/test_xdp.c | 4 ++-- tools/testing/selftests/bpf/progs/test_xdp_loop.c | 4 ++-- tools/testing/selftests/bpf/progs/test_xdp_meta.c | 2 +- .../selftests/bpf/progs/test_xdp_noinline.c | 4 ++-- .../selftests/bpf/progs/test_xdp_redirect.c | 2 +- tools/testing/selftests/bpf/progs/test_xdp_vlan.c | 4 ++-- tools/testing/selftests/bpf/progs/xdp_dummy.c | 2 +- .../testing/selftests/bpf/progs/xdp_redirect_map.c | 2 +- tools/testing/selftests/bpf/progs/xdp_tx.c | 2 +- tools/testing/selftests/bpf/progs/xdping_kern.c | 4 ++-- tools/testing/selftests/bpf/test_cpp.cpp | 6 +++--- tools/testing/selftests/bpf/test_hashmap.c | 2 +- tools/testing/selftests/bpf/test_progs.h | 2 +- tools/testing/selftests/bpf/test_sock.c | 2 +- tools/testing/selftests/bpf/test_sockmap_kern.h | 4 ++-- tools/testing/selftests/bpf/test_sysctl.c | 2 +- tools/testing/selftests/bpf/trace_helpers.h | 2 +- 238 files changed, 359 insertions(+), 354 deletions(-)

5 years, 5 months

4
24
0 0

[PATCH AUTOSEL 4.19 302/671] selftests/ipc: Fix msgque compiler warnings

by Sasha Levin

From: Kees Cook <keescook(a)chromium.org> [ Upstream commit a147faa96f832f76e772b1e448e94ea84c774081 ] This fixes the various compiler warnings when building the msgque selftest. The primary change is using sys/msg.h instead of linux/msg.h directly to gain the API declarations. Fixes: 3a665531a3b7 ("selftests: IPC message queue copy feature test") Signed-off-by: Kees Cook <keescook(a)chromium.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/ipc/msgque.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c index dac927e82336..4c156aeab6b8 100644 --- a/tools/testing/selftests/ipc/msgque.c +++ b/tools/testing/selftests/ipc/msgque.c @@ -1,9 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> -#include <linux/msg.h> +#include <sys/msg.h> #include <fcntl.h> #include "../kselftest.h" @@ -73,7 +74,7 @@ int restore_queue(struct msgque_data *msgque) return 0; destroy: - if (msgctl(id, IPC_RMID, 0)) + if (msgctl(id, IPC_RMID, NULL)) printf("Failed to destroy queue: %d\n", -errno); return ret; } @@ -120,7 +121,7 @@ int check_and_destroy_queue(struct msgque_data *msgque) ret = 0; err: - if (msgctl(msgque->msq_id, IPC_RMID, 0)) { + if (msgctl(msgque->msq_id, IPC_RMID, NULL)) { printf("Failed to destroy queue: %d\n", -errno); return -errno; } @@ -129,7 +130,7 @@ int check_and_destroy_queue(struct msgque_data *msgque) int dump_queue(struct msgque_data *msgque) { - struct msqid64_ds ds; + struct msqid_ds ds; int kern_id; int i, ret; @@ -245,7 +246,7 @@ int main(int argc, char **argv) return ksft_exit_pass(); err_destroy: - if (msgctl(msgque.msq_id, IPC_RMID, 0)) { + if (msgctl(msgque.msq_id, IPC_RMID, NULL)) { printf("Failed to destroy queue: %d\n", -errno); return ksft_exit_fail(); } -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH AUTOSEL 5.4 155/205] libbpf: Fix call relocation offset calculation bug

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit a0d7da26ce86a25e97ae191cb90574ada6daea98 ] When relocating subprogram call, libbpf doesn't take into account relo->text_off, which comes from symbol's value. This generally works fine for subprograms implemented as static functions, but breaks for global functions. Taking a simplified test_pkt_access.c as an example: __attribute__ ((noinline)) static int test_pkt_access_subprog1(volatile struct __sk_buff *skb) { return skb->len * 2; } __attribute__ ((noinline)) static int test_pkt_access_subprog2(int val, volatile struct __sk_buff *skb) { return skb->len + val; } SEC("classifier/test_pkt_access") int test_pkt_access(struct __sk_buff *skb) { if (test_pkt_access_subprog1(skb) != skb->len * 2) return TC_ACT_SHOT; if (test_pkt_access_subprog2(2, skb) != skb->len + 2) return TC_ACT_SHOT; return TC_ACT_UNSPEC; } When compiled, we get two relocations, pointing to '.text' symbol. .text has st_value set to 0 (it points to the beginning of .text section): 0000000000000008 000000050000000a R_BPF_64_32 0000000000000000 .text 0000000000000040 000000050000000a R_BPF_64_32 0000000000000000 .text test_pkt_access_subprog1 and test_pkt_access_subprog2 offsets (targets of two calls) are encoded within call instruction's imm32 part as -1 and 2, respectively: 0000000000000000 test_pkt_access_subprog1: 0: 61 10 00 00 00 00 00 00 r0 = *(u32 *)(r1 + 0) 1: 64 00 00 00 01 00 00 00 w0 <<= 1 2: 95 00 00 00 00 00 00 00 exit 0000000000000018 test_pkt_access_subprog2: 3: 61 10 00 00 00 00 00 00 r0 = *(u32 *)(r1 + 0) 4: 04 00 00 00 02 00 00 00 w0 += 2 5: 95 00 00 00 00 00 00 00 exit 0000000000000000 test_pkt_access: 0: bf 16 00 00 00 00 00 00 r6 = r1 ===> 1: 85 10 00 00 ff ff ff ff call -1 2: bc 01 00 00 00 00 00 00 w1 = w0 3: b4 00 00 00 02 00 00 00 w0 = 2 4: 61 62 00 00 00 00 00 00 r2 = *(u32 *)(r6 + 0) 5: 64 02 00 00 01 00 00 00 w2 <<= 1 6: 5e 21 08 00 00 00 00 00 if w1 != w2 goto +8 <LBB0_3> 7: bf 61 00 00 00 00 00 00 r1 = r6 ===> 8: 85 10 00 00 02 00 00 00 call 2 9: bc 01 00 00 00 00 00 00 w1 = w0 10: 61 62 00 00 00 00 00 00 r2 = *(u32 *)(r6 + 0) 11: 04 02 00 00 02 00 00 00 w2 += 2 12: b4 00 00 00 ff ff ff ff w0 = -1 13: 1e 21 01 00 00 00 00 00 if w1 == w2 goto +1 <LBB0_3> 14: b4 00 00 00 02 00 00 00 w0 = 2 0000000000000078 LBB0_3: 15: 95 00 00 00 00 00 00 00 exit Now, if we compile example with global functions, the setup changes. Relocations are now against specifically test_pkt_access_subprog1 and test_pkt_access_subprog2 symbols, with test_pkt_access_subprog2 pointing 24 bytes into its respective section (.text), i.e., 3 instructions in: 0000000000000008 000000070000000a R_BPF_64_32 0000000000000000 test_pkt_access_subprog1 0000000000000048 000000080000000a R_BPF_64_32 0000000000000018 test_pkt_access_subprog2 Calls instructions now encode offsets relative to function symbols and are both set ot -1: 0000000000000000 test_pkt_access_subprog1: 0: 61 10 00 00 00 00 00 00 r0 = *(u32 *)(r1 + 0) 1: 64 00 00 00 01 00 00 00 w0 <<= 1 2: 95 00 00 00 00 00 00 00 exit 0000000000000018 test_pkt_access_subprog2: 3: 61 20 00 00 00 00 00 00 r0 = *(u32 *)(r2 + 0) 4: 0c 10 00 00 00 00 00 00 w0 += w1 5: 95 00 00 00 00 00 00 00 exit 0000000000000000 test_pkt_access: 0: bf 16 00 00 00 00 00 00 r6 = r1 ===> 1: 85 10 00 00 ff ff ff ff call -1 2: bc 01 00 00 00 00 00 00 w1 = w0 3: b4 00 00 00 02 00 00 00 w0 = 2 4: 61 62 00 00 00 00 00 00 r2 = *(u32 *)(r6 + 0) 5: 64 02 00 00 01 00 00 00 w2 <<= 1 6: 5e 21 09 00 00 00 00 00 if w1 != w2 goto +9 <LBB2_3> 7: b4 01 00 00 02 00 00 00 w1 = 2 8: bf 62 00 00 00 00 00 00 r2 = r6 ===> 9: 85 10 00 00 ff ff ff ff call -1 10: bc 01 00 00 00 00 00 00 w1 = w0 11: 61 62 00 00 00 00 00 00 r2 = *(u32 *)(r6 + 0) 12: 04 02 00 00 02 00 00 00 w2 += 2 13: b4 00 00 00 ff ff ff ff w0 = -1 14: 1e 21 01 00 00 00 00 00 if w1 == w2 goto +1 <LBB2_3> 15: b4 00 00 00 02 00 00 00 w0 = 2 0000000000000080 LBB2_3: 16: 95 00 00 00 00 00 00 00 exit Thus the right formula to calculate target call offset after relocation should take into account relocation's target symbol value (offset within section), call instruction's imm32 offset, and (subtracting, to get relative instruction offset) instruction index of call instruction itself. All that is shifted by number of instructions in main program, given all sub-programs are copied over after main program. Convert few selftests relying on bpf-to-bpf calls to use global functions instead of static ones. Fixes: 48cca7e44f9f ("libbpf: add support for bpf_call") Reported-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Acked-by: Yonghong Song <yhs(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Link: https://lore.kernel.org/bpf/20191119224447.3781271-1-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/lib/bpf/libbpf.c | 8 ++++++-- tools/testing/selftests/bpf/progs/test_btf_haskv.c | 4 ++-- tools/testing/selftests/bpf/progs/test_btf_newkv.c | 4 ++-- tools/testing/selftests/bpf/progs/test_btf_nokv.c | 4 ++-- 4 files changed, 12 insertions(+), 8 deletions(-) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index d98838c5820c..de2be6b2a748 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1791,9 +1791,13 @@ bpf_program__collect_reloc(struct bpf_program *prog, GElf_Shdr *shdr, pr_warning("incorrect bpf_call opcode\n"); return -LIBBPF_ERRNO__RELOC; } + if (sym.st_value % 8) { + pr_warn("bad call relo offset: %lu\n", sym.st_value); + return -LIBBPF_ERRNO__RELOC; + } prog->reloc_desc[i].type = RELO_CALL; prog->reloc_desc[i].insn_idx = insn_idx; - prog->reloc_desc[i].text_off = sym.st_value; + prog->reloc_desc[i].text_off = sym.st_value / 8; obj->has_pseudo_calls = true; continue; } @@ -3239,7 +3243,7 @@ bpf_program__reloc_text(struct bpf_program *prog, struct bpf_object *obj, prog->section_name); } insn = &prog->insns[relo->insn_idx]; - insn->imm += prog->main_prog_cnt - relo->insn_idx; + insn->imm += relo->text_off + prog->main_prog_cnt - relo->insn_idx; return 0; } diff --git a/tools/testing/selftests/bpf/progs/test_btf_haskv.c b/tools/testing/selftests/bpf/progs/test_btf_haskv.c index e5c79fe0ffdb..d65c61e64df2 100644 --- a/tools/testing/selftests/bpf/progs/test_btf_haskv.c +++ b/tools/testing/selftests/bpf/progs/test_btf_haskv.c @@ -25,7 +25,7 @@ struct dummy_tracepoint_args { }; __attribute__((noinline)) -static int test_long_fname_2(struct dummy_tracepoint_args *arg) +int test_long_fname_2(struct dummy_tracepoint_args *arg) { struct ipv_counts *counts; int key = 0; @@ -43,7 +43,7 @@ static int test_long_fname_2(struct dummy_tracepoint_args *arg) } __attribute__((noinline)) -static int test_long_fname_1(struct dummy_tracepoint_args *arg) +int test_long_fname_1(struct dummy_tracepoint_args *arg) { return test_long_fname_2(arg); } diff --git a/tools/testing/selftests/bpf/progs/test_btf_newkv.c b/tools/testing/selftests/bpf/progs/test_btf_newkv.c index 5ee3622ddebb..8e83317db841 100644 --- a/tools/testing/selftests/bpf/progs/test_btf_newkv.c +++ b/tools/testing/selftests/bpf/progs/test_btf_newkv.c @@ -33,7 +33,7 @@ struct dummy_tracepoint_args { }; __attribute__((noinline)) -static int test_long_fname_2(struct dummy_tracepoint_args *arg) +int test_long_fname_2(struct dummy_tracepoint_args *arg) { struct ipv_counts *counts; int key = 0; @@ -56,7 +56,7 @@ static int test_long_fname_2(struct dummy_tracepoint_args *arg) } __attribute__((noinline)) -static int test_long_fname_1(struct dummy_tracepoint_args *arg) +int test_long_fname_1(struct dummy_tracepoint_args *arg) { return test_long_fname_2(arg); } diff --git a/tools/testing/selftests/bpf/progs/test_btf_nokv.c b/tools/testing/selftests/bpf/progs/test_btf_nokv.c index 434188c37774..3f4422044759 100644 --- a/tools/testing/selftests/bpf/progs/test_btf_nokv.c +++ b/tools/testing/selftests/bpf/progs/test_btf_nokv.c @@ -23,7 +23,7 @@ struct dummy_tracepoint_args { }; __attribute__((noinline)) -static int test_long_fname_2(struct dummy_tracepoint_args *arg) +int test_long_fname_2(struct dummy_tracepoint_args *arg) { struct ipv_counts *counts; int key = 0; @@ -41,7 +41,7 @@ static int test_long_fname_2(struct dummy_tracepoint_args *arg) } __attribute__((noinline)) -static int test_long_fname_1(struct dummy_tracepoint_args *arg) +int test_long_fname_1(struct dummy_tracepoint_args *arg) { return test_long_fname_2(arg); } -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH AUTOSEL 5.4 132/205] kselftests: cgroup: Avoid the reuse of fd after it is deallocated

by Sasha Levin

From: Hewenliang <hewenliang4(a)huawei.com> [ Upstream commit d671fa6393d6788fc65555d4643b71cb3a361f36 ] It is necessary to set fd to -1 when inotify_add_watch() fails in cg_prepare_for_wait. Otherwise the fd which has been closed in cg_prepare_for_wait may be misused in other functions such as cg_enter_and_wait_for_frozen and cg_freeze_wait. Fixes: 5313bfe425c8 ("selftests: cgroup: add freezer controller self-tests") Signed-off-by: Hewenliang <hewenliang4(a)huawei.com> Signed-off-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_freezer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/cgroup/test_freezer.c b/tools/testing/selftests/cgroup/test_freezer.c index 0fc1b6d4b0f9..62a27ab3c2f3 100644 --- a/tools/testing/selftests/cgroup/test_freezer.c +++ b/tools/testing/selftests/cgroup/test_freezer.c @@ -72,6 +72,7 @@ static int cg_prepare_for_wait(const char *cgroup) if (ret == -1) { debug("Error: inotify_add_watch() failed\n"); close(fd); + fd = -1; } return fd; -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH AUTOSEL 5.4 116/205] selftests: gen_kselftest_tar.sh: Do not clobber kselftest/

by Sasha Levin

From: Kees Cook <keescook(a)chromium.org> [ Upstream commit ea1bf0bb18c0bd627d7b551196453ff2fff44225 ] The default installation location for gen_kselftest_tar.sh was still "kselftest/" which collides with the existing directory. Instead, this moves the installation target into "kselftest_install/kselftest/" and adjusts the tar creation accordingly. This also adjusts indentation and logic to be consistent. Fixes: 42d46e57ec97 ("selftests: Extract single-test shell logic from lib.mk") Signed-off-by: Kees Cook <keescook(a)chromium.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/gen_kselftest_tar.sh | 21 ++++++++++------- tools/testing/selftests/kselftest_install.sh | 24 ++++++++++---------- 2 files changed, 25 insertions(+), 20 deletions(-) diff --git a/tools/testing/selftests/gen_kselftest_tar.sh b/tools/testing/selftests/gen_kselftest_tar.sh index a27e2eec3586..8b2b6088540d 100755 --- a/tools/testing/selftests/gen_kselftest_tar.sh +++ b/tools/testing/selftests/gen_kselftest_tar.sh @@ -38,16 +38,21 @@ main() esac fi - install_dir=./kselftest + # Create working directory. + dest=`pwd` + install_work="$dest"/kselftest_install + install_name=kselftest + install_dir="$install_work"/"$install_name" + mkdir -p "$install_dir" -# Run install using INSTALL_KSFT_PATH override to generate install -# directory -./kselftest_install.sh -tar $copts kselftest${ext} $install_dir -echo "Kselftest archive kselftest${ext} created!" + # Run install using INSTALL_KSFT_PATH override to generate install + # directory + ./kselftest_install.sh "$install_dir" + (cd "$install_work"; tar $copts "$dest"/kselftest${ext} $install_name) + echo "Kselftest archive kselftest${ext} created!" -# clean up install directory -rm -rf kselftest + # clean up top-level install work directory + rm -rf "$install_work" } main "$@" diff --git a/tools/testing/selftests/kselftest_install.sh b/tools/testing/selftests/kselftest_install.sh index e2e1911d62d5..407af7da7037 100755 --- a/tools/testing/selftests/kselftest_install.sh +++ b/tools/testing/selftests/kselftest_install.sh @@ -6,30 +6,30 @@ # Author: Shuah Khan <shuahkh(a)osg.samsung.com> # Copyright (C) 2015 Samsung Electronics Co., Ltd. -install_loc=`pwd` - main() { - if [ $(basename $install_loc) != "selftests" ]; then + base_dir=`pwd` + install_dir="$base_dir"/kselftest_install + + # Make sure we're in the selftests top-level directory. + if [ $(basename "$base_dir") != "selftests" ]; then echo "$0: Please run it in selftests directory ..." exit 1; fi + + # Only allow installation into an existing location. if [ "$#" -eq 0 ]; then - echo "$0: Installing in default location - $install_loc ..." + echo "$0: Installing in default location - $install_dir ..." elif [ ! -d "$1" ]; then echo "$0: $1 doesn't exist!!" exit 1; else - install_loc=$1 - echo "$0: Installing in specified location - $install_loc ..." + install_dir="$1" + echo "$0: Installing in specified location - $install_dir ..." fi - install_dir=$install_loc/kselftest_install - -# Create install directory - mkdir -p $install_dir -# Build tests - KSFT_INSTALL_PATH=$install_dir make install + # Build tests + KSFT_INSTALL_PATH="$install_dir" make install } main "$@" -- 2.20.1

5 years, 5 months

1
0
0 0

[PATCH] selftests: fix spelling mistaked "chaigned" -> "chained"

by Colin King

From: Colin Ian King <colin.king(a)canonical.com> There is a spelling mistake in a literal string, fix it. Signed-off-by: Colin Ian King <colin.king(a)canonical.com> --- tools/testing/selftests/openat2/resolve_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/openat2/resolve_test.c b/tools/testing/selftests/openat2/resolve_test.c index 7a94b1da8e7b..bbafad440893 100644 --- a/tools/testing/selftests/openat2/resolve_test.c +++ b/tools/testing/selftests/openat2/resolve_test.c @@ -230,7 +230,7 @@ void test_openat2_opath_tests(void) { .name = "[in_root] garbage link to /root", .path = "cheeky/garbageself", .how.resolve = RESOLVE_IN_ROOT, .out.path = "root", .pass = true }, - { .name = "[in_root] chainged garbage links to /root", + { .name = "[in_root] chained garbage links to /root", .path = "abscheeky/garbageself", .how.resolve = RESOLVE_IN_ROOT, .out.path = "root", .pass = true }, { .name = "[in_root] relative path to 'root'", -- 2.24.0

5 years, 5 months

2
1
0 0

[PATCH v5 0/2] mm/hmm/test: add self tests for HMM

by Ralph Campbell

This series adds basic self tests for HMM and mmu interval notifiers so that changes can be validated. It is based on linux-5.5.0-rc1 and is for Jason's rdma/hmm tree since I believe he is planning some interval notifier changes. Patch 2 was last posted as part of [1] but the other patches in that series have been merged and this version of the HMM tests is modified to address Jason's concern over using both process wide MMU notifiers in combination with MMU interval notifiers. Therefore, patch 1 adds some core functionality to allow intervals to be updated from within the invalidation() callback so that MMU_NOTIFY_UNMAP events can update the range being tracked. [1] https://lore.kernel.org/linux-mm/20191104222141.5173-1-rcampbell@nvidia.com Ralph Campbell (2): mm/mmu_notifier: make interval notifier updates safe mm/hmm/test: add self tests for HMM MAINTAINERS | 3 + include/linux/mmu_notifier.h | 15 + lib/Kconfig.debug | 11 + lib/Makefile | 1 + lib/test_hmm.c | 1367 ++++++++++++++++++++++++ mm/mmu_notifier.c | 196 +++- tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 3 + tools/testing/selftests/vm/config | 2 + tools/testing/selftests/vm/hmm-tests.c | 1360 +++++++++++++++++++++++ tools/testing/selftests/vm/run_vmtests | 16 + tools/testing/selftests/vm/test_hmm.sh | 97 ++ 12 files changed, 3047 insertions(+), 25 deletions(-) create mode 100644 lib/test_hmm.c create mode 100644 tools/testing/selftests/vm/hmm-tests.c create mode 100755 tools/testing/selftests/vm/test_hmm.sh -- 2.20.1

5 years, 5 months

3
11
0 0

[PATCH v15 00/24] selftests, powerpc, x86: Memory Protection Keys

by Sandipan Das

Memory protection keys enables an application to protect its address space from inadvertent access by its own code. This feature is now enabled on powerpc and has been available since 4.16-rc1. The patches move the selftests to arch neutral directory and enhance their test coverage. Testing ------- Verified for correctness on powerpc. Need help with x86 testing as I do not have access to a Skylake server. Client platforms like Coffee Lake do not have the required feature bits set in CPUID. Changelog --------- Link to previous version (v14): https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=55981&state=* v15: (1) Rebased on top of latest master. (2) Addressed review comments from Dave Hansen. (3) Moved code for getting or setting pkey bits to new helpers. These changes replace patch 7 of v14. (4) Added a fix which ensures that the correct count of reserved keys is used across different platforms. (5) Added a fix which ensures that the correct page size is used as powerpc supports both 4K and 64K pages. v14: (1) Incorporated another round of comments from Dave Hansen. v13: (1) Incorporated comments for Dave Hansen. (2) Added one more test for correct pkey-0 behavior. v12: (1) Fixed the offset of pkey field in the siginfo structure for x86_64 and powerpc. And tries to use the actual field if the headers have it defined. v11: (1) Fixed a deadlock in the ptrace testcase. v10 and prior: (1) Moved the testcase to arch neutral directory. (2) Split the changes into incremental patches. Desnes A. Nunes do Rosario (1): selftests/vm/pkeys: Fix number of reserved powerpc pkeys Ram Pai (17): selftests/x86/pkeys: Move selftests to arch-neutral directory selftests/vm/pkeys: Rename all references to pkru to a generic name selftests/vm/pkeys: Move generic definitions to header file selftests/vm/pkeys: Typecast the pkey register selftests/vm/pkeys: Fix pkey_disable_clear() selftests/vm/pkeys: Fix assertion in pkey_disable_set/clear() selftests/vm/pkeys: Fix alloc_random_pkey() to make it really random selftests/vm/pkeys: Introduce generic pkey abstractions selftests/vm/pkeys: Introduce powerpc support selftests/vm/pkeys: Fix assertion in test_pkey_alloc_exhaust() selftests/vm/pkeys: Improve checks to determine pkey support selftests/vm/pkeys: Associate key on a mapped page and detect access violation selftests/vm/pkeys: Associate key on a mapped page and detect write violation selftests/vm/pkeys: Detect write violation on a mapped access-denied-key page selftests/vm/pkeys: Introduce a sub-page allocator selftests/vm/pkeys: Test correct behaviour of pkey-0 selftests/vm/pkeys: Override access right definitions on powerpc Sandipan Das (3): selftests: vm: pkeys: Add helpers for pkey bits selftests: vm: pkeys: Use the correct huge page size selftests: vm: pkeys: Use the correct page size on powerpc Thiago Jung Bauermann (2): selftests/vm/pkeys: Move some definitions to arch-specific header selftests/vm/pkeys: Make gcc check arguments of sigsafe_printf() tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 5 + tools/testing/selftests/vm/pkey-helpers.h | 226 ++++++ tools/testing/selftests/vm/pkey-powerpc.h | 138 ++++ tools/testing/selftests/vm/pkey-x86.h | 183 +++++ .../selftests/{x86 => vm}/protection_keys.c | 688 ++++++++++-------- tools/testing/selftests/x86/.gitignore | 1 - tools/testing/selftests/x86/pkey-helpers.h | 219 ------ 8 files changed, 931 insertions(+), 530 deletions(-) create mode 100644 tools/testing/selftests/vm/pkey-helpers.h create mode 100644 tools/testing/selftests/vm/pkey-powerpc.h create mode 100644 tools/testing/selftests/vm/pkey-x86.h rename tools/testing/selftests/{x86 => vm}/protection_keys.c (74%) delete mode 100644 tools/testing/selftests/x86/pkey-helpers.h -- 2.17.1

5 years, 5 months

5
35
0 0

[BUGFIX PATCH] selftests: Fix pthread link option

by Masami Hiramatsu

To support pthread correctly, it is better to use -pthread instead of -lpthread. Signed-off-by: Masami Hiramatsu <mhiramat(a)kernel.org> --- tools/testing/selftests/bpf/Makefile | 2 +- tools/testing/selftests/membarrier/Makefile | 2 +- tools/testing/selftests/mqueue/Makefile | 2 +- tools/testing/selftests/net/Makefile | 4 ++-- .../testing/selftests/powerpc/benchmarks/Makefile | 4 ++-- tools/testing/selftests/powerpc/dscr/Makefile | 2 +- tools/testing/selftests/powerpc/mm/Makefile | 2 +- tools/testing/selftests/rseq/Makefile | 2 +- tools/testing/selftests/rtc/Makefile | 2 +- tools/testing/selftests/seccomp/Makefile | 2 +- tools/testing/selftests/timers/Makefile | 2 +- tools/testing/selftests/vm/Makefile | 2 +- 12 files changed, 14 insertions(+), 14 deletions(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index e2fd6f8d579c..419f58c53d12 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -22,7 +22,7 @@ CFLAGS += -g -Wall -O2 $(GENFLAGS) -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) \ -I$(GENDIR) -I$(TOOLSDIR) -I$(CURDIR) \ -Dbpf_prog_load=bpf_prog_test_load \ -Dbpf_load_program=bpf_test_load_program -LDLIBS += -lcap -lelf -lrt -lpthread +LDLIBS += -lcap -lelf -lrt -pthread # Order correspond to 'make run_tests' order TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \ diff --git a/tools/testing/selftests/membarrier/Makefile b/tools/testing/selftests/membarrier/Makefile index 34d1c81a2324..19d657d966e3 100644 --- a/tools/testing/selftests/membarrier/Makefile +++ b/tools/testing/selftests/membarrier/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only CFLAGS += -g -I../../../../usr/include/ -LDLIBS += -lpthread +LDLIBS += -pthread TEST_GEN_PROGS := membarrier_test_single_thread \ membarrier_test_multi_thread diff --git a/tools/testing/selftests/mqueue/Makefile b/tools/testing/selftests/mqueue/Makefile index 8a58055fc1f5..9986b778b8b3 100644 --- a/tools/testing/selftests/mqueue/Makefile +++ b/tools/testing/selftests/mqueue/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += -O2 -LDLIBS = -lrt -lpthread -lpopt +LDLIBS = -lrt -pthread -lpopt TEST_GEN_PROGS := mq_open_tests mq_perf_tests diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index a8e04d665b69..6ad8571bb0ed 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -25,5 +25,5 @@ KSFT_KHDR_INSTALL := 1 include ../lib.mk $(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma -$(OUTPUT)/tcp_mmap: LDFLAGS += -lpthread -$(OUTPUT)/tcp_inq: LDFLAGS += -lpthread +$(OUTPUT)/tcp_mmap: LDFLAGS += -pthread +$(OUTPUT)/tcp_inq: LDFLAGS += -pthread diff --git a/tools/testing/selftests/powerpc/benchmarks/Makefile b/tools/testing/selftests/powerpc/benchmarks/Makefile index d40300a65b42..0d7c82d520ce 100644 --- a/tools/testing/selftests/powerpc/benchmarks/Makefile +++ b/tools/testing/selftests/powerpc/benchmarks/Makefile @@ -11,8 +11,8 @@ $(TEST_GEN_PROGS): ../harness.c $(OUTPUT)/context_switch: ../utils.c $(OUTPUT)/context_switch: CFLAGS += -maltivec -mvsx -mabi=altivec -$(OUTPUT)/context_switch: LDLIBS += -lpthread +$(OUTPUT)/context_switch: LDLIBS += -pthread -$(OUTPUT)/fork: LDLIBS += -lpthread +$(OUTPUT)/fork: LDLIBS += -pthread $(OUTPUT)/exec_target: CFLAGS += -static -nostartfiles diff --git a/tools/testing/selftests/powerpc/dscr/Makefile b/tools/testing/selftests/powerpc/dscr/Makefile index 5df476364b4d..90c744592d1b 100644 --- a/tools/testing/selftests/powerpc/dscr/Makefile +++ b/tools/testing/selftests/powerpc/dscr/Makefile @@ -6,6 +6,6 @@ TEST_GEN_PROGS := dscr_default_test dscr_explicit_test dscr_user_test \ top_srcdir = ../../../../.. include ../../lib.mk -$(OUTPUT)/dscr_default_test: LDLIBS += -lpthread +$(OUTPUT)/dscr_default_test: LDLIBS += -pthread $(TEST_GEN_PROGS): ../harness.c diff --git a/tools/testing/selftests/powerpc/mm/Makefile b/tools/testing/selftests/powerpc/mm/Makefile index ed1565809d2b..4cda9b0b3dd4 100644 --- a/tools/testing/selftests/powerpc/mm/Makefile +++ b/tools/testing/selftests/powerpc/mm/Makefile @@ -20,4 +20,4 @@ $(OUTPUT)/large_vm_fork_separation: CFLAGS += -m64 $(OUTPUT)/tempfile: dd if=/dev/zero of=$@ bs=64k count=1 -$(OUTPUT)/tlbie_test: LDLIBS += -lpthread +$(OUTPUT)/tlbie_test: LDLIBS += -pthread diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile index d6469535630a..3a17f5b74b9c 100644 --- a/tools/testing/selftests/rseq/Makefile +++ b/tools/testing/selftests/rseq/Makefile @@ -6,7 +6,7 @@ endif CFLAGS += -O2 -Wall -g -I./ -I../../../../usr/include/ -L./ -Wl,-rpath=./ \ $(CLANG_FLAGS) -LDLIBS += -lpthread +LDLIBS += -pthread # Own dependencies because we only want to build against 1st prerequisite, but # still track changes to header files and depend on shared object. diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile index de9c8566672a..d075ecfbe846 100644 --- a/tools/testing/selftests/rtc/Makefile +++ b/tools/testing/selftests/rtc/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += -O3 -Wl,-no-as-needed -Wall -LDFLAGS += -lrt -lpthread -lm +LDFLAGS += -lrt -pthread -lm TEST_GEN_PROGS = rtctest diff --git a/tools/testing/selftests/seccomp/Makefile b/tools/testing/selftests/seccomp/Makefile index 1760b3e39730..3e35159f709a 100644 --- a/tools/testing/selftests/seccomp/Makefile +++ b/tools/testing/selftests/seccomp/Makefile @@ -9,7 +9,7 @@ BINARIES := seccomp_bpf seccomp_benchmark CFLAGS += -Wl,-no-as-needed -Wall seccomp_bpf: seccomp_bpf.c ../kselftest_harness.h - $(CC) $(CFLAGS) $(LDFLAGS) $< -lpthread -o $@ + $(CC) $(CFLAGS) $(LDFLAGS) $< -pthread -o $@ TEST_PROGS += $(BINARIES) EXTRA_CLEAN := $(BINARIES) diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile index 7656c7ce79d9..70461befa338 100644 --- a/tools/testing/selftests/timers/Makefile +++ b/tools/testing/selftests/timers/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += -O3 -Wl,-no-as-needed -Wall -LDLIBS += -lrt -lpthread -lm +LDLIBS += -lrt -pthread -lm # these are all "safe" tests that don't modify # system time or require escalated privileges diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index 7f9a8a8c31da..afb35febd7b6 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -31,6 +31,6 @@ TEST_FILES := test_vmalloc.sh KSFT_KHDR_INSTALL := 1 include ../lib.mk -$(OUTPUT)/userfaultfd: LDLIBS += -lpthread +$(OUTPUT)/userfaultfd: LDLIBS += -pthread $(OUTPUT)/mlock-random-test: LDLIBS += -lcap

5 years, 5 months

2
3
0 0

[PATCH] software node: introduce CONFIG_KUNIT_DRIVER_PE_TEST

by Alan Maguire

currently the property entry kunit tests are built if CONFIG_KUNIT=y. This will cause warnings when merged with the kunit tree that now supports tristate CONFIG_KUNIT. While the tests appear to compile as a module, we get a warning about missing module license. It's better to have a per-test suite CONFIG variable so that we can do selective building of kunit-based suites, and can also avoid merge issues like this. Reported-by: Stephen Rothwell <sfr(a)canb.auug.org.au> Fixes: c032ace71c29 ("software node: add basic tests for property entries") Signed-off-by: Alan Maguire <alan.maguire(a)oracle.com> --- drivers/base/test/Kconfig | 3 +++ drivers/base/test/Makefile | 2 +- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/base/test/Kconfig b/drivers/base/test/Kconfig index 86e85da..d29ae95 100644 --- a/drivers/base/test/Kconfig +++ b/drivers/base/test/Kconfig @@ -8,3 +8,6 @@ config TEST_ASYNC_DRIVER_PROBE The module name will be test_async_driver_probe.ko If unsure say N. +config KUNIT_DRIVER_PE_TEST + bool "KUnit Tests for property entry API" + depends on KUNIT diff --git a/drivers/base/test/Makefile b/drivers/base/test/Makefile index 2214310..3ca5636 100644 --- a/drivers/base/test/Makefile +++ b/drivers/base/test/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_TEST_ASYNC_DRIVER_PROBE) += test_async_driver_probe.o -obj-$(CONFIG_KUNIT) += property-entry-test.o +obj-$(CONFIG_KUNIT_DRIVER_PE_TEST) += property-entry-test.o -- 1.8.3.1

5 years, 5 months

4
5
0 0

Re: linux-next: Tree for Jan 13 (drivers/base/test/property-entry-test.o)

by Randy Dunlap

On 1/12/20 11:14 PM, Stephen Rothwell wrote: > Hi all, > > Changes since 20200110: > > The kunit-next tree lost its failures. > on i386: WARNING: modpost: missing MODULE_LICENSE() in drivers/base/test/property-entry-test.o see include/linux/module.h for more information -- ~Randy Reported-by: Randy Dunlap <rdunlap(a)infradead.org>

5 years, 5 months

4
3
0 0

[PATCH v2 0/8] vdso: Complete the conversion to 32bit syscalls

by Vincenzo Frascino

This patch series is a follow up to "lib/vdso, x86/vdso: Fix fallout from generic VDSO conversion" [1]. The main purpose is to complete the 32bit vDSOs conversion to use the legacy 32bit syscalls as a fallback. With the conversion of all the architectures present in -next complete, this patch series removes as well the conditional choice in between 32 and 64 bit for 32bit vDSOs. This series has been rebased on linux-next/master. [1] https://lkml.org/lkml/2019/7/28/86 Cc: Catalin Marinas <catalin.marinas(a)arm.com> Cc: Will Deacon <will(a)kernel.org> Cc: Paul Burton <paul.burton(a)mips.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Dmitry Safonov <0x7f454c46(a)gmail.com> Cc: Andy Lutomirski <luto(a)kernel.org> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Vincenzo Frascino (8): arm64: compat: vdso: Expose BUILD_VDSO32 lib: vdso: Build 32 bit specific functions in the right context mips: compat: vdso: Use legacy syscalls as fallback lib: vdso: Remove VDSO_HAS_32BIT_FALLBACK lib: vdso: Remove checks on return value for 32 bit vDSO arm64: compat: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK mips: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK x86: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK .../include/asm/vdso/compat_gettimeofday.h | 2 +- arch/mips/include/asm/vdso/gettimeofday.h | 43 +++++++++++++++++++ arch/mips/vdso/config-n32-o32-env.c | 1 + arch/x86/include/asm/vdso/gettimeofday.h | 2 - lib/vdso/gettimeofday.c | 30 ++++++------- 5 files changed, 57 insertions(+), 21 deletions(-) -- 2.23.0

5 years, 5 months

4
22
0 0

[PATCH] [RFC] kunit: move binary assertion out of line

by Arnd Bergmann

In combination with the structleak gcc plugin, kunit can lead to excessive stack usage when each assertion adds another structure to the stack from of the calling function: base/test/property-entry-test.c:99:1: error: the frame size of 3032 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] As most assertions are binary, change those over to a direct function call that does not have this problem. This can probably be improved further, I just went for a straightforward conversion, but a function call with 12 fixed arguments plus varargs it not great either. Cc: Kees Cook <keescook(a)chromium.org> Cc: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Cc: Brendan Higgins <brendanhiggins(a)google.com> Cc: Stephen Boyd <sboyd(a)kernel.org> Cc: Dmitry Torokhov <dmitry.torokhov(a)gmail.com> Cc: "Rafael J. Wysocki" <rjw(a)rjwysocki.net> Cc: linux-kselftest(a)vger.kernel.org Cc: kunit-dev(a)googlegroups.com Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- I think improving the compiler or the plugin to not force the allocation of these structs would be better, as it avoids the whack-a-mole game of fixing up each time it hits us, but this may not be possible using the current plugin infrastructure. --- include/kunit/test.h | 155 ++++++++++++------------------------------- lib/kunit/assert.c | 8 +-- lib/kunit/test.c | 42 ++++++++++++ 3 files changed, 90 insertions(+), 115 deletions(-) diff --git a/include/kunit/test.h b/include/kunit/test.h index dba48304b3bd..76eadd4a8b77 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -391,6 +391,16 @@ void kunit_do_assertion(struct kunit *test, bool pass, const char *fmt, ...); +void kunit_do_binary_assertion(struct kunit *test, bool pass, + enum kunit_assert_type type, + int line, const char *file, + const char *operation, + const char *left_text, long long left_value, + const char *right_text, long long right_value, + void (*format)(const struct kunit_assert *assert, + struct string_stream *stream), + const char *fmt, ...); + #define KUNIT_ASSERTION(test, pass, assert_class, INITIALIZER, fmt, ...) do { \ struct assert_class __assertion = INITIALIZER; \ kunit_do_assertion(test, \ @@ -491,19 +501,32 @@ do { \ typeof(left) __left = (left); \ typeof(right) __right = (right); \ ((void)__typecheck(__left, __right)); \ - \ - KUNIT_ASSERTION(test, \ - __left op __right, \ - assert_class, \ - ASSERT_CLASS_INIT(test, \ - assert_type, \ - #op, \ - #left, \ - __left, \ - #right, \ - __right), \ - fmt, \ - ##__VA_ARGS__); \ + kunit_do_binary_assertion(test, left op right, assert_type, \ + __LINE__, __FILE__, #op, #left, __left, \ + #right, __right, \ + kunit_binary_assert_format, \ + fmt, ##__VA_ARGS__); \ +} while (0) + +#define KUNIT_BASE_POINTER_ASSERTION(test, \ + assert_class, \ + ASSERT_CLASS_INIT, \ + assert_type, \ + left, \ + op, \ + right, \ + fmt, \ + ...) \ +do { \ + typeof(left) __left = (left); \ + typeof(right) __right = (right); \ + ((void)__typecheck(__left, __right)); \ + kunit_do_binary_assertion(test, left op right, assert_type, \ + __LINE__, __FILE__, #op, \ + #left, (uintptr_t)__left, \ + #right, (uintptr_t)__right, \ + kunit_binary_ptr_assert_format, \ + fmt, ##__VA_ARGS__); \ } while (0) #define KUNIT_BASE_EQ_MSG_ASSERTION(test, \ @@ -625,12 +648,11 @@ do { \ right, \ fmt, \ ...) \ - KUNIT_BASE_EQ_MSG_ASSERTION(test, \ - kunit_binary_ptr_assert, \ - KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT, \ + KUNIT_BASE_POINTER_ASSERTION(test, \ + assert_class, \ + ASSERT_CLASS_INIT, \ assert_type, \ - left, \ - right, \ + left, ==, right, \ fmt, \ ##__VA_ARGS__) @@ -664,12 +686,11 @@ do { \ right, \ fmt, \ ...) \ - KUNIT_BASE_NE_MSG_ASSERTION(test, \ - kunit_binary_ptr_assert, \ - KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT, \ + KUNIT_BASE_POINTER_ASSERTION(test, \ + assert_class, \ + ASSERT_CLASS_INIT, \ assert_type, \ - left, \ - right, \ + left, !=, right, \ fmt, \ ##__VA_ARGS__) @@ -697,28 +718,6 @@ do { \ right, \ NULL) -#define KUNIT_BINARY_PTR_LT_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ...) \ - KUNIT_BASE_LT_MSG_ASSERTION(test, \ - kunit_binary_ptr_assert, \ - KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ##__VA_ARGS__) - -#define KUNIT_BINARY_PTR_LT_ASSERTION(test, assert_type, left, right) \ - KUNIT_BINARY_PTR_LT_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - NULL) - #define KUNIT_BINARY_LE_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ KUNIT_BASE_LE_MSG_ASSERTION(test, \ kunit_binary_assert, \ @@ -736,28 +735,6 @@ do { \ right, \ NULL) -#define KUNIT_BINARY_PTR_LE_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ...) \ - KUNIT_BASE_LE_MSG_ASSERTION(test, \ - kunit_binary_ptr_assert, \ - KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ##__VA_ARGS__) - -#define KUNIT_BINARY_PTR_LE_ASSERTION(test, assert_type, left, right) \ - KUNIT_BINARY_PTR_LE_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - NULL) - #define KUNIT_BINARY_GT_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ KUNIT_BASE_GT_MSG_ASSERTION(test, \ kunit_binary_assert, \ @@ -775,28 +752,6 @@ do { \ right, \ NULL) -#define KUNIT_BINARY_PTR_GT_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ...) \ - KUNIT_BASE_GT_MSG_ASSERTION(test, \ - kunit_binary_ptr_assert, \ - KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ##__VA_ARGS__) - -#define KUNIT_BINARY_PTR_GT_ASSERTION(test, assert_type, left, right) \ - KUNIT_BINARY_PTR_GT_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - NULL) - #define KUNIT_BINARY_GE_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ KUNIT_BASE_GE_MSG_ASSERTION(test, \ kunit_binary_assert, \ @@ -814,28 +769,6 @@ do { \ right, \ NULL) -#define KUNIT_BINARY_PTR_GE_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ...) \ - KUNIT_BASE_GE_MSG_ASSERTION(test, \ - kunit_binary_ptr_assert, \ - KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT, \ - assert_type, \ - left, \ - right, \ - fmt, \ - ##__VA_ARGS__) - -#define KUNIT_BINARY_PTR_GE_ASSERTION(test, assert_type, left, right) \ - KUNIT_BINARY_PTR_GE_MSG_ASSERTION(test, \ - assert_type, \ - left, \ - right, \ - NULL) - #define KUNIT_BINARY_STR_ASSERTION(test, \ assert_type, \ left, \ diff --git a/lib/kunit/assert.c b/lib/kunit/assert.c index 86013d4cf891..abb6c70de925 100644 --- a/lib/kunit/assert.c +++ b/lib/kunit/assert.c @@ -101,8 +101,8 @@ void kunit_binary_assert_format(const struct kunit_assert *assert, void kunit_binary_ptr_assert_format(const struct kunit_assert *assert, struct string_stream *stream) { - struct kunit_binary_ptr_assert *binary_assert = container_of( - assert, struct kunit_binary_ptr_assert, assert); + struct kunit_binary_assert *binary_assert = container_of( + assert, struct kunit_binary_assert, assert); kunit_base_assert_format(assert, stream); string_stream_add(stream, @@ -112,10 +112,10 @@ void kunit_binary_ptr_assert_format(const struct kunit_assert *assert, binary_assert->right_text); string_stream_add(stream, "\t\t%s == %pK\n", binary_assert->left_text, - binary_assert->left_value); + (void *)(uintptr_t)binary_assert->left_value); string_stream_add(stream, "\t\t%s == %pK", binary_assert->right_text, - binary_assert->right_value); + (void *)(uintptr_t)binary_assert->right_value); kunit_assert_print_msg(assert, stream); } diff --git a/lib/kunit/test.c b/lib/kunit/test.c index c83c0fa59cbd..937f3fbe5ecc 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -172,6 +172,48 @@ void kunit_do_assertion(struct kunit *test, kunit_abort(test); } +void kunit_do_binary_assertion(struct kunit *test, bool pass, + enum kunit_assert_type type, + int line, const char *file, + const char *operation, + const char *left_text, long long left_value, + const char *right_text, long long right_value, + void (*format)(const struct kunit_assert *assert, + struct string_stream *stream), + const char *fmt, ...) +{ + va_list args; + struct kunit_binary_assert assert = { + .assert = { + .test = test, + .type = type, + .file = file, + .line = line, + .message.fmt = fmt, + .format = format, + }, + .operation = operation, + .left_text = left_text, + .left_value = left_value, + .right_text = right_text, + .right_value = right_value, + }; + + if (pass) + return; + + va_start(args, fmt); + + assert.assert.message.va = &args; + + kunit_fail(test, &assert.assert); + + va_end(args); + + if (type == KUNIT_ASSERTION) + kunit_abort(test); +} + void kunit_init_test(struct kunit *test, const char *name) { spin_lock_init(&test->lock); -- 2.20.0

5 years, 5 months

2
3
0 0

[PATCH 0/2] selftests/livepatch: Trivial cleanups

by Miroslav Benes

Two trivial cleanups after recent changes in selftests/livepatch. Based on "next" branch of Shuah's kselftest tree. Miroslav Benes (2): selftests/livepatch: Replace set_dynamic_debug() with setup_config() in README selftests/livepatch: Remove unused local variable in set_ftrace_enabled() tools/testing/selftests/livepatch/README | 2 +- tools/testing/selftests/livepatch/functions.sh | 1 - 2 files changed, 1 insertion(+), 2 deletions(-) -- 2.24.1

5 years, 5 months

4
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[PATCH kunit] kunit: building kunit as a module breaks allmodconfig

by Alan Maguire

kunit tests that do not support module build should depend on KUNIT=y rather than just KUNIT in Kconfig, otherwise they will trigger compilation errors for "make allmodconfig" builds. Fixes: 9fe124bf1b77 ("kunit: allow kunit to be loaded as a module") Signed-off-by: Alan Maguire <alan.maguire(a)oracle.com> Reported-by: Stephen Rothwell <sfr(a)canb.auug.org.au> --- drivers/base/Kconfig | 2 +- security/apparmor/Kconfig | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index c3b3b5c..5f0bc74 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -150,7 +150,7 @@ config DEBUG_TEST_DRIVER_REMOVE config PM_QOS_KUNIT_TEST bool "KUnit Test for PM QoS features" - depends on KUNIT + depends on KUNIT=y config HMEM_REPORTING bool diff --git a/security/apparmor/Kconfig b/security/apparmor/Kconfig index d547930..0fe3368 100644 --- a/security/apparmor/Kconfig +++ b/security/apparmor/Kconfig @@ -71,7 +71,7 @@ config SECURITY_APPARMOR_DEBUG_MESSAGES config SECURITY_APPARMOR_KUNIT_TEST bool "Build KUnit tests for policy_unpack.c" - depends on KUNIT && SECURITY_APPARMOR + depends on KUNIT=y && SECURITY_APPARMOR help This builds the AppArmor KUnit tests. -- 1.8.3.1

5 years, 5 months

3
2
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Investment opportunity

by Peter Wong

Greetings, Please read the attached investment proposal and reply for more details. Are you interested in loan? Sincerely: Peter Wong ---------------------------------------------------- This email was sent by the shareware version of Postman Professional.

5 years, 5 months

1
0
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[PATCH v3] selftests/lkdtm: Add tests for LKDTM targets

by Kees Cook

This adds a basic framework for running all the "safe" LKDTM tests. This will allow easy introspection into any selftest logs to examine the results of most LKDTM tests. Signed-off-by: Kees Cook <keescook(a)chromium.org> --- v3: replace open-coded "4" with $KSELFTEST_SKIP_TEXT (shuah), add DOUBLE_FAULT v2: https://lore.kernel.org/lkml/201912301453.19D686EE6@keescook v1: https://lore.kernel.org/lkml/201905091013.E228F0F0BE@keescook --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/lkdtm/Makefile | 12 ++++ tools/testing/selftests/lkdtm/config | 1 + tools/testing/selftests/lkdtm/run.sh | 92 +++++++++++++++++++++++++ tools/testing/selftests/lkdtm/tests.txt | 71 +++++++++++++++++++ 6 files changed, 178 insertions(+) create mode 100644 tools/testing/selftests/lkdtm/Makefile create mode 100644 tools/testing/selftests/lkdtm/config create mode 100755 tools/testing/selftests/lkdtm/run.sh create mode 100644 tools/testing/selftests/lkdtm/tests.txt diff --git a/MAINTAINERS b/MAINTAINERS index cc0a4a8ae06a..eacc00c6cfd5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9578,6 +9578,7 @@ LINUX KERNEL DUMP TEST MODULE (LKDTM) M: Kees Cook <keescook(a)chromium.org> S: Maintained F: drivers/misc/lkdtm/* +F: tools/testing/selftests/lkdtm/* LINUX KERNEL MEMORY CONSISTENCY MODEL (LKMM) M: Alan Stern <stern(a)rowland.harvard.edu> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b001c602414b..f0b02a12ba39 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -26,6 +26,7 @@ TARGETS += kexec TARGETS += kvm TARGETS += lib TARGETS += livepatch +TARGETS += lkdtm TARGETS += membarrier TARGETS += memfd TARGETS += memory-hotplug diff --git a/tools/testing/selftests/lkdtm/Makefile b/tools/testing/selftests/lkdtm/Makefile new file mode 100644 index 000000000000..1bcc9ee990eb --- /dev/null +++ b/tools/testing/selftests/lkdtm/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for LKDTM regression tests + +include ../lib.mk + +# NOTE: $(OUTPUT) won't get default value if used before lib.mk +TEST_FILES := tests.txt +TEST_GEN_PROGS = $(patsubst %,$(OUTPUT)/%.sh,$(shell awk '{print $$1}' tests.txt | sed -e 's/\#//')) +all: $(TEST_GEN_PROGS) + +$(OUTPUT)/%: run.sh tests.txt + install -m 0744 run.sh $@ diff --git a/tools/testing/selftests/lkdtm/config b/tools/testing/selftests/lkdtm/config new file mode 100644 index 000000000000..d874990e442b --- /dev/null +++ b/tools/testing/selftests/lkdtm/config @@ -0,0 +1 @@ +CONFIG_LKDTM=y diff --git a/tools/testing/selftests/lkdtm/run.sh b/tools/testing/selftests/lkdtm/run.sh new file mode 100755 index 000000000000..dadf819148a4 --- /dev/null +++ b/tools/testing/selftests/lkdtm/run.sh @@ -0,0 +1,92 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# This reads tests.txt for the list of LKDTM tests to invoke. Any marked +# with a leading "#" are skipped. The rest of the line after the +# test name is either the text to look for in dmesg for a "success", +# or the rationale for why a test is marked to be skipped. +# +set -e +TRIGGER=/sys/kernel/debug/provoke-crash/DIRECT +KSELFTEST_SKIP_TEST=4 + +# Verify we have LKDTM available in the kernel. +if [ ! -r $TRIGGER ] ; then + /sbin/modprobe -q lkdtm || true + if [ ! -r $TRIGGER ] ; then + echo "Cannot find $TRIGGER (missing CONFIG_LKDTM?)" + else + echo "Cannot write $TRIGGER (need to run as root?)" + fi + # Skip this test + exit $KSELFTEST_SKIP_TEST +fi + +# Figure out which test to run from our script name. +test=$(basename $0 .sh) +# Look up details about the test from master list of LKDTM tests. +line=$(egrep '^#?'"$test"'\b' tests.txt) +if [ -z "$line" ]; then + echo "Skipped: missing test '$test' in tests.txt" + exit $KSELFTEST_SKIP_TEST +fi +# Check that the test is known to LKDTM. +if ! egrep -q '^'"$test"'$' "$TRIGGER" ; then + echo "Skipped: test '$test' missing in $TRIGGER!" + exit $KSELFTEST_SKIP_TEST +fi + +# Extract notes/expected output from test list. +test=$(echo "$line" | cut -d" " -f1) +if echo "$line" | grep -q ' ' ; then + expect=$(echo "$line" | cut -d" " -f2-) +else + expect="" +fi + +# If the test is commented out, report a skip +if echo "$test" | grep -q '^#' ; then + test=$(echo "$test" | cut -c2-) + if [ -z "$expect" ]; then + expect="crashes entire system" + fi + echo "Skipping $test: $expect" + exit $KSELFTEST_SKIP_TEST +fi + +# If no expected output given, assume an Oops with back trace is success. +if [ -z "$expect" ]; then + expect="call trace:" +fi + +# Clear out dmesg for output reporting +dmesg -c >/dev/null + +# Prepare log for report checking +LOG=$(mktemp --tmpdir -t lkdtm-XXXXXX) +cleanup() { + rm -f "$LOG" +} +trap cleanup EXIT + +# Most shells yell about signals and we're expecting the "cat" process +# to usually be killed by the kernel. So we have to run it in a sub-shell +# and silence errors. +($SHELL -c 'cat <(echo '"$test"') >'"$TRIGGER" 2>/dev/null) || true + +# Record and dump the results +dmesg -c >"$LOG" +cat "$LOG" +# Check for expected output +if egrep -qi "$expect" "$LOG" ; then + echo "$test: saw '$expect': ok" + exit 0 +else + if egrep -qi XFAIL: "$LOG" ; then + echo "$test: saw 'XFAIL': [SKIP]" + exit $KSELFTEST_SKIP_TEST + else + echo "$test: missing '$expect': [FAIL]" + exit 1 + fi +fi diff --git a/tools/testing/selftests/lkdtm/tests.txt b/tools/testing/selftests/lkdtm/tests.txt new file mode 100644 index 000000000000..92ca32143ae5 --- /dev/null +++ b/tools/testing/selftests/lkdtm/tests.txt @@ -0,0 +1,71 @@ +#PANIC +BUG kernel BUG at +WARNING WARNING: +WARNING_MESSAGE message trigger +EXCEPTION +#LOOP Hangs the system +#EXHAUST_STACK Corrupts memory on failure +#CORRUPT_STACK Crashes entire system on success +#CORRUPT_STACK_STRONG Crashes entire system on success +CORRUPT_LIST_ADD list_add corruption +CORRUPT_LIST_DEL list_del corruption +CORRUPT_USER_DS Invalid address limit on user-mode return +STACK_GUARD_PAGE_LEADING +STACK_GUARD_PAGE_TRAILING +UNSET_SMEP CR4 bits went missing +DOUBLE_FAULT +UNALIGNED_LOAD_STORE_WRITE +#OVERWRITE_ALLOCATION Corrupts memory on failure +#WRITE_AFTER_FREE Corrupts memory on failure +READ_AFTER_FREE +#WRITE_BUDDY_AFTER_FREE Corrupts memory on failure +READ_BUDDY_AFTER_FREE +SLAB_FREE_DOUBLE +SLAB_FREE_CROSS +SLAB_FREE_PAGE +#SOFTLOCKUP Hangs the system +#HARDLOCKUP Hangs the system +#SPINLOCKUP Hangs the system +#HUNG_TASK Hangs the system +EXEC_DATA +EXEC_STACK +EXEC_KMALLOC +EXEC_VMALLOC +EXEC_RODATA +EXEC_USERSPACE +EXEC_NULL +ACCESS_USERSPACE +ACCESS_NULL +WRITE_RO +WRITE_RO_AFTER_INIT +WRITE_KERN +REFCOUNT_INC_OVERFLOW +REFCOUNT_ADD_OVERFLOW +REFCOUNT_INC_NOT_ZERO_OVERFLOW +REFCOUNT_ADD_NOT_ZERO_OVERFLOW +REFCOUNT_DEC_ZERO +REFCOUNT_DEC_NEGATIVE Negative detected: saturated +REFCOUNT_DEC_AND_TEST_NEGATIVE Negative detected: saturated +REFCOUNT_SUB_AND_TEST_NEGATIVE Negative detected: saturated +REFCOUNT_INC_ZERO +REFCOUNT_ADD_ZERO +REFCOUNT_INC_SATURATED Saturation detected: still saturated +REFCOUNT_DEC_SATURATED Saturation detected: still saturated +REFCOUNT_ADD_SATURATED Saturation detected: still saturated +REFCOUNT_INC_NOT_ZERO_SATURATED +REFCOUNT_ADD_NOT_ZERO_SATURATED +REFCOUNT_DEC_AND_TEST_SATURATED Saturation detected: still saturated +REFCOUNT_SUB_AND_TEST_SATURATED Saturation detected: still saturated +#REFCOUNT_TIMING timing only +#ATOMIC_TIMING timing only +USERCOPY_HEAP_SIZE_TO +USERCOPY_HEAP_SIZE_FROM +USERCOPY_HEAP_WHITELIST_TO +USERCOPY_HEAP_WHITELIST_FROM +USERCOPY_STACK_FRAME_TO +USERCOPY_STACK_FRAME_FROM +USERCOPY_STACK_BEYOND +USERCOPY_KERNEL +USERCOPY_KERNEL_DS +STACKLEAK_ERASING OK: the rest of the thread stack is properly erased +CFI_FORWARD_PROTO -- 2.20.1 -- Kees Cook

5 years, 5 months

1
0
0 0

[PATCH v2] selftests/lkdtm: Add tests for LKDTM targets

by Kees Cook

This adds a basic framework for running all the "safe" LKDTM tests. This will allow easy introspection into any selftest logs to examine the results of most LKDTM tests. Signed-off-by: Kees Cook <keescook(a)chromium.org> --- v2: refreshed for v5.5, added new tests since v1 v1: https://lore.kernel.org/lkml/201905091013.E228F0F0BE@keescook/ --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/lkdtm/Makefile | 12 ++++ tools/testing/selftests/lkdtm/config | 1 + tools/testing/selftests/lkdtm/run.sh | 91 +++++++++++++++++++++++++ tools/testing/selftests/lkdtm/tests.txt | 70 +++++++++++++++++++ 6 files changed, 176 insertions(+) create mode 100644 tools/testing/selftests/lkdtm/Makefile create mode 100644 tools/testing/selftests/lkdtm/config create mode 100755 tools/testing/selftests/lkdtm/run.sh create mode 100644 tools/testing/selftests/lkdtm/tests.txt diff --git a/MAINTAINERS b/MAINTAINERS index cc0a4a8ae06a..eacc00c6cfd5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9578,6 +9578,7 @@ LINUX KERNEL DUMP TEST MODULE (LKDTM) M: Kees Cook <keescook(a)chromium.org> S: Maintained F: drivers/misc/lkdtm/* +F: tools/testing/selftests/lkdtm/* LINUX KERNEL MEMORY CONSISTENCY MODEL (LKMM) M: Alan Stern <stern(a)rowland.harvard.edu> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b001c602414b..f0b02a12ba39 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -26,6 +26,7 @@ TARGETS += kexec TARGETS += kvm TARGETS += lib TARGETS += livepatch +TARGETS += lkdtm TARGETS += membarrier TARGETS += memfd TARGETS += memory-hotplug diff --git a/tools/testing/selftests/lkdtm/Makefile b/tools/testing/selftests/lkdtm/Makefile new file mode 100644 index 000000000000..1bcc9ee990eb --- /dev/null +++ b/tools/testing/selftests/lkdtm/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for LKDTM regression tests + +include ../lib.mk + +# NOTE: $(OUTPUT) won't get default value if used before lib.mk +TEST_FILES := tests.txt +TEST_GEN_PROGS = $(patsubst %,$(OUTPUT)/%.sh,$(shell awk '{print $$1}' tests.txt | sed -e 's/\#//')) +all: $(TEST_GEN_PROGS) + +$(OUTPUT)/%: run.sh tests.txt + install -m 0744 run.sh $@ diff --git a/tools/testing/selftests/lkdtm/config b/tools/testing/selftests/lkdtm/config new file mode 100644 index 000000000000..d874990e442b --- /dev/null +++ b/tools/testing/selftests/lkdtm/config @@ -0,0 +1 @@ +CONFIG_LKDTM=y diff --git a/tools/testing/selftests/lkdtm/run.sh b/tools/testing/selftests/lkdtm/run.sh new file mode 100755 index 000000000000..793ee0d5d5a3 --- /dev/null +++ b/tools/testing/selftests/lkdtm/run.sh @@ -0,0 +1,91 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# This reads tests.txt for the list of LKDTM tests to invoke. Any marked +# with a leading "#" are skipped. The rest of the line after the +# test name is either the text to look for in dmesg for a "success", +# or the rationale for why a test is marked to be skipped. +# +set -e +TRIGGER=/sys/kernel/debug/provoke-crash/DIRECT + +# Verify we have LKDTM available in the kernel. +if [ ! -r $TRIGGER ] ; then + /sbin/modprobe -q lkdtm || true + if [ ! -r $TRIGGER ] ; then + echo "Cannot find $TRIGGER (missing CONFIG_LKDTM?)" + else + echo "Cannot write $TRIGGER (need to run as root?)" + fi + # Skip this test + exit 4 +fi + +# Figure out which test to run from our script name. +test=$(basename $0 .sh) +# Look up details about the test from master list of LKDTM tests. +line=$(egrep '^#?'"$test"'\b' tests.txt) +if [ -z "$line" ]; then + echo "Skipped: missing test '$test' in tests.txt" + exit 4 +fi +# Check that the test is known to LKDTM. +if ! egrep -q '^'"$test"'$' "$TRIGGER" ; then + echo "Skipped: test '$test' missing in $TRIGGER!" + exit 4 +fi + +# Extract notes/expected output from test list. +test=$(echo "$line" | cut -d" " -f1) +if echo "$line" | grep -q ' ' ; then + expect=$(echo "$line" | cut -d" " -f2-) +else + expect="" +fi + +# If the test is commented out, report a skip +if echo "$test" | grep -q '^#' ; then + test=$(echo "$test" | cut -c2-) + if [ -z "$expect" ]; then + expect="crashes entire system" + fi + echo "Skipping $test: $expect" + exit 4 +fi + +# If no expected output given, assume an Oops with back trace is success. +if [ -z "$expect" ]; then + expect="call trace:" +fi + +# Clear out dmesg for output reporting +dmesg -c >/dev/null + +# Prepare log for report checking +LOG=$(mktemp --tmpdir -t lkdtm-XXXXXX) +cleanup() { + rm -f "$LOG" +} +trap cleanup EXIT + +# Most shells yell about signals and we're expecting the "cat" process +# to usually be killed by the kernel. So we have to run it in a sub-shell +# and silence errors. +($SHELL -c 'cat <(echo '"$test"') >'"$TRIGGER" 2>/dev/null) || true + +# Record and dump the results +dmesg -c >"$LOG" +cat "$LOG" +# Check for expected output +if egrep -qi "$expect" "$LOG" ; then + echo "$test: saw '$expect': ok" + exit 0 +else + if egrep -qi XFAIL: "$LOG" ; then + echo "$test: saw 'XFAIL': [SKIP]" + exit 4 + else + echo "$test: missing '$expect': [FAIL]" + exit 1 + fi +fi diff --git a/tools/testing/selftests/lkdtm/tests.txt b/tools/testing/selftests/lkdtm/tests.txt new file mode 100644 index 000000000000..fc55f8ef8bee --- /dev/null +++ b/tools/testing/selftests/lkdtm/tests.txt @@ -0,0 +1,70 @@ +#PANIC +BUG kernel BUG at +WARNING WARNING: +WARNING_MESSAGE message trigger +EXCEPTION +#LOOP Hangs the system +#EXHAUST_STACK Corrupts memory on failure +#CORRUPT_STACK Crashes entire system on success +#CORRUPT_STACK_STRONG Crashes entire system on success +CORRUPT_LIST_ADD list_add corruption +CORRUPT_LIST_DEL list_del corruption +CORRUPT_USER_DS Invalid address limit on user-mode return +STACK_GUARD_PAGE_LEADING +STACK_GUARD_PAGE_TRAILING +UNSET_SMEP CR4 bits went missing +UNALIGNED_LOAD_STORE_WRITE +#OVERWRITE_ALLOCATION Corrupts memory on failure +#WRITE_AFTER_FREE Corrupts memory on failure +READ_AFTER_FREE +#WRITE_BUDDY_AFTER_FREE Corrupts memory on failure +READ_BUDDY_AFTER_FREE +SLAB_FREE_DOUBLE +SLAB_FREE_CROSS +SLAB_FREE_PAGE +#SOFTLOCKUP Hangs the system +#HARDLOCKUP Hangs the system +#SPINLOCKUP Hangs the system +#HUNG_TASK Hangs the system +EXEC_DATA +EXEC_STACK +EXEC_KMALLOC +EXEC_VMALLOC +EXEC_RODATA +EXEC_USERSPACE +EXEC_NULL +ACCESS_USERSPACE +ACCESS_NULL +WRITE_RO +WRITE_RO_AFTER_INIT +WRITE_KERN +REFCOUNT_INC_OVERFLOW +REFCOUNT_ADD_OVERFLOW +REFCOUNT_INC_NOT_ZERO_OVERFLOW +REFCOUNT_ADD_NOT_ZERO_OVERFLOW +REFCOUNT_DEC_ZERO +REFCOUNT_DEC_NEGATIVE Negative detected: saturated +REFCOUNT_DEC_AND_TEST_NEGATIVE Negative detected: saturated +REFCOUNT_SUB_AND_TEST_NEGATIVE Negative detected: saturated +REFCOUNT_INC_ZERO +REFCOUNT_ADD_ZERO +REFCOUNT_INC_SATURATED Saturation detected: still saturated +REFCOUNT_DEC_SATURATED Saturation detected: still saturated +REFCOUNT_ADD_SATURATED Saturation detected: still saturated +REFCOUNT_INC_NOT_ZERO_SATURATED +REFCOUNT_ADD_NOT_ZERO_SATURATED +REFCOUNT_DEC_AND_TEST_SATURATED Saturation detected: still saturated +REFCOUNT_SUB_AND_TEST_SATURATED Saturation detected: still saturated +#REFCOUNT_TIMING timing only +#ATOMIC_TIMING timing only +USERCOPY_HEAP_SIZE_TO +USERCOPY_HEAP_SIZE_FROM +USERCOPY_HEAP_WHITELIST_TO +USERCOPY_HEAP_WHITELIST_FROM +USERCOPY_STACK_FRAME_TO +USERCOPY_STACK_FRAME_FROM +USERCOPY_STACK_BEYOND +USERCOPY_KERNEL +USERCOPY_KERNEL_DS +STACKLEAK_ERASING OK: the rest of the thread stack is properly erased +CFI_FORWARD_PROTO -- 2.20.1 -- Kees Cook

5 years, 5 months

2
1
0 0

What is the best way to compare an unsigned and a constant?

by SeongJae Park

Hello, I have a function returning 'unsigned long', and would like to write a kunit test for the function, as below. unsigned long foo(void) { return 42; } static void foo_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 42, foo()); } However, this kunit gives me below warning for the above code: /.../linux/include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ^ /.../linux/include/kunit/test.h:493:9: note: in expansion of macro ‘__typecheck’ ((void)__typecheck(__left, __right)); \ ^~~~~~~~~~~ /.../linux/include/kunit/test.h:517:2: note: in expansion of macro ‘KUNIT_BASE_BINARY_ASSERTION’ KUNIT_BASE_BINARY_ASSERTION(test, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/include/kunit/test.h:606:2: note: in expansion of macro ‘KUNIT_BASE_EQ_MSG_ASSERTION’ KUNIT_BASE_EQ_MSG_ASSERTION(test, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/include/kunit/test.h:616:2: note: in expansion of macro ‘KUNIT_BINARY_EQ_MSG_ASSERTION’ KUNIT_BINARY_EQ_MSG_ASSERTION(test, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/include/kunit/test.h:979:2: note: in expansion of macro ‘KUNIT_BINARY_EQ_ASSERTION’ KUNIT_BINARY_EQ_ASSERTION(test, KUNIT_EXPECTATION, left, right) ^~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/mm/foo-test.h:565:2: note: in expansion of macro ‘KUNIT_EXPECT_EQ’ KUNIT_EXPECT_EQ(test, 42, foo()); ^~~~~~~~~~~~~~~ I could remove the warning by explicitly type casting the constant as below: KUNIT_EXPECT_EQ(test, (unsigned long)42, foo()); However, now 'checkpatch.pl' complains about the type casting as below. WARNING: Unnecessary typecast of c90 int constant #565: FILE: mm/foo-test.h:565: + KUNIT_EXPECT_EQ(test, (unsigned long)42, foo()); Of course, there could be several work-arounds for these warnings, such as using 'EXPECT_TRUE(test, 42 == foo())' or casting the function's return value. Nonetheless, I'm not sure what is the right way. Could you please let me know what is the recommended way for this case? Thanks, SeongJae Park

5 years, 5 months

3
7
0 0

[PATCH v3 0/8] Create a userfaultfd demand paging test

by Ben Gardon

When handling page faults for many vCPUs during demand paging, KVM's MMU lock becomes highly contended. This series creates a test with a naive userfaultfd based demand paging implementation to demonstrate that contention. This test serves both as a functional test of userfaultfd and a microbenchmark of demand paging performance with a variable number of vCPUs and memory per vCPU. The test creates N userfaultfd threads, N vCPUs, and a region of memory with M pages per vCPU. The N userfaultfd polling threads are each set up to serve faults on a region of memory corresponding to one of the vCPUs. Each of the vCPUs is then started, and touches each page of its disjoint memory region, sequentially. In response to faults, the userfaultfd threads copy a static buffer into the guest's memory. This creates a worst case for MMU lock contention as we have removed most of the contention between the userfaultfd threads and there is no time required to fetch the contents of guest memory. This test was run successfully on Intel Haswell, Broadwell, and Cascadelake hosts with a variety of vCPU counts and memory sizes. This test was adapted from the dirty_log_test. The series can also be viewed in Gerrit here: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/1464 (Thanks to Dmitry Vyukov <dvyukov(a)google.com> for setting up the Gerrit instance) Ben Gardon (9): KVM: selftests: Create a demand paging test KVM: selftests: Add demand paging content to the demand paging test KVM: selftests: Add memory size parameter to the demand paging test KVM: selftests: Pass args to vCPU instead of using globals KVM: selftests: Support multiple vCPUs in demand paging test KVM: selftests: Time guest demand paging KVM: selftests: Add parameter to _vm_create for memslot 0 base paddr KVM: selftests: Support large VMs in demand paging test Add static flag tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 4 +- .../selftests/kvm/demand_paging_test.c | 610 ++++++++++++++++++ tools/testing/selftests/kvm/dirty_log_test.c | 2 +- .../testing/selftests/kvm/include/kvm_util.h | 3 +- tools/testing/selftests/kvm/lib/kvm_util.c | 7 +- 6 files changed, 621 insertions(+), 6 deletions(-) create mode 100644 tools/testing/selftests/kvm/demand_paging_test.c -- 2.23.0.444.g18eeb5a265-goog

5 years, 5 months

3
25
0 0

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