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

[PATCH bpf-next v4 0/4] xsk: TX metadata Launch Time support

by Song Yoong Siang

This series expands the XDP TX metadata framework to allow user applications to pass per packet 64-bit launch time directly to the kernel driver, requesting launch time hardware offload support. The XDP TX metadata framework will not perform any clock conversion or packet reordering. Please note that the role of Tx metadata is just to pass the launch time, not to enable the offload feature. Users will need to enable the launch time hardware offload feature of the device by using the respective command, such as the tc-etf command. Although some devices use the tc-etf command to enable their launch time hardware offload feature, xsk packets will not go through the etf qdisc. Therefore, in my opinion, the launch time should always be based on the PTP Hardware Clock (PHC). Thus, i did not include a clock ID to indicate the clock source. To simplify the test steps, I modified the xdp_hw_metadata bpf self-test tool in such a way that it will set the launch time based on the offset provided by the user and the value of the Receive Hardware Timestamp, which is against the PHC. This will eliminate the need to discipline System Clock with the PHC and then use clock_gettime() to get the time. Please note that AF_XDP lacks a feedback mechanism to inform the application if the requested launch time is invalid. So, users are expected to familiar with the horizon of the launch time of the device they use and not request a launch time that is beyond the horizon. Otherwise, the driver might interpret the launch time incorrectly and react wrongly. For stmmac and igc, where modulo computation is used, a launch time larger than the horizon will cause the device to transmit the packet earlier that the requested launch time. Although there is no feedback mechanism for the launch time request for now, user still can check whether the requested launch time is working or not, by requesting the Transmit Completion Hardware Timestamp. Changes since v1: - renamed to use Earliest TxTime First (Willem) - renamed to use txtime (Willem) Changes since v2: - renamed to use launch time (Jesper & Willem) - changed the default launch time in xdp_hw_metadata apps from 1s to 0.1s because some NICs do not support such a large future time. Changes since v3: - added XDP launch time support to the igc driver (Jesper & Florian) - added per-driver launch time limitation on xsk-tx-metadata.rst (Jesper) - added explanation on FIFO behavior on xsk-tx-metadata.rst (Jakub) - added step to enable launch time in the commit message (Jesper & Willem) - explicitly documented the type of launch_time and which clock source it is against (Willem) v1: https://patchwork.kernel.org/project/netdevbpf/cover/20231130162028.852006-… v2: https://patchwork.kernel.org/project/netdevbpf/cover/20231201062421.1074768… v3: https://patchwork.kernel.org/project/netdevbpf/cover/20231203165129.1740512… Song Yoong Siang (4): xsk: Add launch time hardware offload support to XDP Tx metadata selftests/bpf: Add Launch Time request to xdp_hw_metadata net: stmmac: Add launch time support to XDP ZC igc: Add launch time support to XDP ZC Documentation/netlink/specs/netdev.yaml | 4 + Documentation/networking/xsk-tx-metadata.rst | 64 +++++++++++++++ drivers/net/ethernet/intel/igc/igc_main.c | 78 +++++++++++++------ drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 + .../net/ethernet/stmicro/stmmac/stmmac_main.c | 13 ++++ include/net/xdp_sock.h | 10 +++ include/net/xdp_sock_drv.h | 1 + include/uapi/linux/if_xdp.h | 10 +++ include/uapi/linux/netdev.h | 3 + net/core/netdev-genl.c | 2 + net/xdp/xsk.c | 3 + tools/include/uapi/linux/if_xdp.h | 10 +++ tools/include/uapi/linux/netdev.h | 3 + tools/testing/selftests/bpf/xdp_hw_metadata.c | 30 ++++++- 14 files changed, 208 insertions(+), 25 deletions(-) -- 2.34.1

6 months

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rust/kernel/lib.rs:17:12 : warning: the feature `new_uninit` has been stable since 1.82.0 and no longer requires an attribute to enable

by Naresh Kamboju

The following kselftest rust builds failed on sashal/linus-next.git due to following build warnings / errors. Good: 829d8581c398a96deea1d6bc78578950347dcbec Bad: b2d472701a703596889c3fd067fd8929aeffc4be Build error: -------------- warning: the feature `new_uninit` has been stable since 1.82.0 and no longer requires an attribute to enable --> /rust/kernel/lib.rs:17:12 | 17 | #![feature(new_uninit)] | ^^^^^^^^^^ | = note: `#[warn(stable_features)]` on by default error[E0658]: use of unstable library feature 'box_uninit_write' --> /rust/kernel/alloc/box_ext.rs:41:12 | 41 | Ok(Box::write(b, x)) | ^^^^^^^^^^ | = note: see issue #129397 <https://github.com/rust-lang/rust/issues/129397> for more information = help: add `#![feature(box_uninit_write)]` to the crate attributes to enable = note: this compiler was built on 2024-11-26; consider upgrading it if it is out of date error: aborting due to 1 previous error; 1 warning emitted For more information about this error, try `rustc --explain E0658`. make[3]: *** [/rust/Makefile:425: rust/kernel.o] Error 1 Links: ------- - https://qa-reports.linaro.org/lkft/sashal-linus-next/build/v6.11-rc4-6237-g… - https://qa-reports.linaro.org/lkft/sashal-linus-next/build/v6.11-rc4-6237-g… - https://qa-reports.linaro.org/lkft/sashal-linus-next/build/v6.11-rc4-6237-g… metadata: ---- git repo: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linus-next.git kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2rByIOiC9ssqI7NjEPY7… build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2rByIOiC9ssqI7NjEPY7… toolchain: rustgcc compiler: 'name': 'gcc', 'version': '14', 'version_full': 'gcc (Debian 14.2.0-8) 14.2.0' config: rustgcc-lkftconfig-kselftest arch: arm64 -- Linaro LKFT https://lkft.linaro.org

6 months

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[PATCH net] selftests: tc-testing: reduce rshift value

by Jakub Kicinski

After previous change rshift >= 32 is no longer allowed. Modify the test to use 31, the test doesn't seem to send any traffic so the exact value shouldn't matter. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: jhs(a)mojatatu.com CC: xiyou.wangcong(a)gmail.com CC: jiri(a)resnulli.us CC: shuah(a)kernel.org CC: karansanghvi98(a)gmail.com CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/tc-testing/tc-tests/filters/flow.json | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json index 996448afe31b..91d120548bf5 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json @@ -78,10 +78,10 @@ "setup": [ "$TC qdisc add dev $DEV1 ingress" ], - "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 prio 1 protocol ip flow map key dst rshift 0xff", + "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 prio 1 protocol ip flow map key dst rshift 0x1f", "expExitCode": "0", "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 1 flow", - "matchPattern": "filter parent ffff: protocol ip pref 1 flow chain [0-9]+ handle 0x1 map keys dst rshift 255 baseclass", + "matchPattern": "filter parent ffff: protocol ip pref 1 flow chain [0-9]+ handle 0x1 map keys dst rshift 31 baseclass", "matchCount": "1", "teardown": [ "$TC qdisc del dev $DEV1 ingress" -- 2.47.1

6 months

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[PATCH v3 0/2] fix reading ESP during coredump

by Nam Cao

Hi, In /proc/PID/stat, there is the kstkesp field which is the stack pointer of a thread. While the thread is active, this field reads zero. But during a coredump, it should have a valid value. However, at the moment, kstkesp is zero even during coredump. The first commit fixes this problem, and the second commit adds a selftest to detect if this problem appears again in the future. v2..v3 https://lore.kernel.org/lkml/cover.1735550994.git.namcao@linutronix.de/ - Move stackdump file to local directory [Kees] - Always cleanup the stackdump file after the test [Kees] - Remove unused empty function v1..v2 https://lore.kernel.org/lkml/cover.1730883229.git.namcao@linutronix.de/ - Change the fix patch to use PF_POSTCOREDUMP [Oleg] Nam Cao (2): fs/proc: do_task_stat: Fix ESP not readable during coredump selftests: coredump: Add stackdump test fs/proc/array.c | 2 +- tools/testing/selftests/coredump/Makefile | 7 + tools/testing/selftests/coredump/README.rst | 50 ++++++ tools/testing/selftests/coredump/stackdump | 14 ++ .../selftests/coredump/stackdump_test.c | 151 ++++++++++++++++++ 5 files changed, 223 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/coredump/Makefile create mode 100644 tools/testing/selftests/coredump/README.rst create mode 100755 tools/testing/selftests/coredump/stackdump create mode 100644 tools/testing/selftests/coredump/stackdump_test.c -- 2.39.5

6 months

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[PATCH AUTOSEL 6.6 3/3] selftests/alsa: Fix circular dependency involving global-timer

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit 55853cb829dc707427c3519f6b8686682a204368 ] The pattern rule `$(OUTPUT)/%: %.c` inadvertently included a circular dependency on the global-timer target due to its inclusion in $(TEST_GEN_PROGS_EXTENDED). This resulted in a circular dependency warning during the build process. To resolve this, the dependency on $(TEST_GEN_PROGS_EXTENDED) has been replaced with an explicit dependency on $(OUTPUT)/libatest.so. This change ensures that libatest.so is built before any other targets that require it, without creating a circular dependency. This fix addresses the following warning: make[4]: Entering directory 'tools/testing/selftests/alsa' make[4]: Circular default_modconfig/kselftest/alsa/global-timer <- default_modconfig/kselftest/alsa/global-timer dependency dropped. make[4]: Nothing to be done for 'all'. make[4]: Leaving directory 'tools/testing/selftests/alsa' Cc: Mark Brown <broonie(a)kernel.org> Cc: Jaroslav Kysela <perex(a)perex.cz> Cc: Takashi Iwai <tiwai(a)suse.com> Cc: Shuah Khan <shuah(a)kernel.org> Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Link: https://patch.msgid.link/20241218025931.914164-1-lizhijian@fujitsu.com Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/alsa/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile index 5af9ba8a4645..140c7f821727 100644 --- a/tools/testing/selftests/alsa/Makefile +++ b/tools/testing/selftests/alsa/Makefile @@ -23,5 +23,5 @@ include ../lib.mk $(OUTPUT)/libatest.so: conf.c alsa-local.h $(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@ -$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) alsa-local.h +$(OUTPUT)/%: %.c $(OUTPUT)/libatest.so alsa-local.h $(CC) $(CFLAGS) $< $(LDLIBS) -latest -o $@ -- 2.39.5

6 months

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[PATCH AUTOSEL 6.12 4/4] selftests/alsa: Fix circular dependency involving global-timer

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit 55853cb829dc707427c3519f6b8686682a204368 ] The pattern rule `$(OUTPUT)/%: %.c` inadvertently included a circular dependency on the global-timer target due to its inclusion in $(TEST_GEN_PROGS_EXTENDED). This resulted in a circular dependency warning during the build process. To resolve this, the dependency on $(TEST_GEN_PROGS_EXTENDED) has been replaced with an explicit dependency on $(OUTPUT)/libatest.so. This change ensures that libatest.so is built before any other targets that require it, without creating a circular dependency. This fix addresses the following warning: make[4]: Entering directory 'tools/testing/selftests/alsa' make[4]: Circular default_modconfig/kselftest/alsa/global-timer <- default_modconfig/kselftest/alsa/global-timer dependency dropped. make[4]: Nothing to be done for 'all'. make[4]: Leaving directory 'tools/testing/selftests/alsa' Cc: Mark Brown <broonie(a)kernel.org> Cc: Jaroslav Kysela <perex(a)perex.cz> Cc: Takashi Iwai <tiwai(a)suse.com> Cc: Shuah Khan <shuah(a)kernel.org> Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Link: https://patch.msgid.link/20241218025931.914164-1-lizhijian@fujitsu.com Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/alsa/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile index 944279160fed..8dab90ad22bb 100644 --- a/tools/testing/selftests/alsa/Makefile +++ b/tools/testing/selftests/alsa/Makefile @@ -27,5 +27,5 @@ include ../lib.mk $(OUTPUT)/libatest.so: conf.c alsa-local.h $(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@ -$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) alsa-local.h +$(OUTPUT)/%: %.c $(OUTPUT)/libatest.so alsa-local.h $(CC) $(CFLAGS) $< $(LDLIBS) -latest -o $@ -- 2.39.5

6 months

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[PATCH v7 0/2] selftests: tmpfs: Add kselftest support

by Shivam Chaudhary

This version 7 patch series replace direct error handling methods with ksft macros, which provide better reporting.Currently, when the tmpfs test runs, it does not display any output if it passes,and if it fails (particularly when not run as root),it simply exits without any warning or message. This series of patch adds: 1. Add 'ksft_print_header()' and 'ksft_set_plan()' to structure test outputs more effectively. 2. skip if not run as root. 3. Replace direct error handling with 'ksft_test_result_*', macros for better reporting. v6->v7: - Improve the handling of failure macros. v6 v1: https://lore.kernel.org/all/20241219152929.4005003-2-cvam0000@gmail.com/ v6 v2: https://lore.kernel.org/all/20241219152929.4005003-3-cvam0000@gmail.com/ v5->v6: - Skip if not run as root. v5 v1: https://lore.kernel.org/all/20241112143056.565122-2-cvam0000@gmail.com/ v5 v2: https://lore.kernel.org/all/20241112143056.565122-3-cvam0000@gmail.com/ v4->v5: - Remove unnecessary pass messages. - Remove unnecessary use of KSFT_SKIP. - Add appropriate use of ksft_exit_fail_msg. v4 v1: https://lore.kernel.org/all/8db9feab-0600-440b-b4b2-042695a100b5@linuxfound… v4 v2: https://lore.kernel.org/all/63d5e3bb-9817-4a34-98fe-823a9cac7c16@linuxfound… v3->v4: - Start a patchset - Split patch into smaller patches to make it easy to review. Patch1 Replace 'ksft_test_result_skip' with 'KSFT_SKIP' during root run check. Patch2 Replace 'ksft_test_result_fail' with 'KSFT_SKIP' where fail does not make sense, or failure could be due to not unsupported APIs with appropriate warnings. v3: https://lore.kernel.org/all/20241028185756.111832-1-cvam0000@gmail.com/ v2->v3: - Remove extra ksft_set_plan() - Remove function for unshare() - Fix the comment style v2: https://lore.kernel.org/all/20241026191621.2860376-1-cvam0000@gmail.com/ v1->v2: - Make the commit message more clear. v1: https://lore.kernel.org/all/20241024200228.1075840-1-cvam0000@gmail.com/T/#u thanks Shivam Shivam Chaudhary (2): selftests: tmpfs: Add Test-skip if not run as root selftests: tmpfs: Add kselftest support to tmpfs .../selftests/tmpfs/bug-link-o-tmpfile.c | 40 ++++++++++++------- 1 file changed, 26 insertions(+), 14 deletions(-) -- 2.34.1

6 months

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[PATCH v5 0/3] rust: kunit: Support KUnit tests with a user-space like syntax

by David Gow

Hi all, v5 here is a small set of fixes and a rebase of the previous versions. If there are no major issues, I'd like to land this soon so it can be used and tested ready for 6.14. This series was originally written by José Expósito, and has been modified and updated by Matt Gilbride and myself. The original version can be found here: https://github.com/Rust-for-Linux/linux/pull/950 Add support for writing KUnit tests in Rust. While Rust doctests are already converted to KUnit tests and run, they're really better suited for examples, rather than as first-class unit tests. This series implements a series of direct Rust bindings for KUnit tests, as well as a new macro which allows KUnit tests to be written using a close variant of normal Rust unit test syntax. The only change required is replacing '#[cfg(test)]' with '#[kunit_tests(kunit_test_suite_name)]' An example test would look like: #[kunit_tests(rust_kernel_hid_driver)] mod tests { use super::*; use crate::{c_str, driver, hid, prelude::*}; use core::ptr; struct SimpleTestDriver; impl Driver for SimpleTestDriver { type Data = (); } #[test] fn rust_test_hid_driver_adapter() { let mut hid = bindings::hid_driver::default(); let name = c_str!("SimpleTestDriver"); static MODULE: ThisModule = unsafe { ThisModule::from_ptr(ptr::null_mut()) }; let res = unsafe { <hid::Adapter<SimpleTestDriver> as driver::DriverOps>::register(&mut hid, name, &MODULE) }; assert_eq!(res, Err(ENODEV)); // The mock returns -19 } } Please give this a go, and make sure I haven't broken it! There's almost certainly a lot of improvements which can be made -- and there's a fair case to be made for replacing some of this with generated C code which can use the C macros -- but this is hopefully an adequate implementation for now, and the interface can (with luck) remain the same even if the implementation changes. A few small notable missing features: - Attributes (like the speed of a test) are hardcoded to the default value. - Similarly, the module name attribute is hardcoded to NULL. In C, we use the KBUILD_MODNAME macro, but I couldn't find a way to use this from Rust which wasn't more ugly than just disabling it. - Assertions are not automatically rewritten to use KUnit assertions. --- Changes since v4: https://lore.kernel.org/linux-kselftest/20241101064505.3820737-1-davidgow@g… - Rebased against 6.13-rc1 - Allowed an unused_unsafe warning after the behaviour of addr_of_mut!() changed in Rust 1.82. (Thanks Boqun, Miguel) - "Expect" that the sample assert_eq!(1+1, 2) produces a clippy warning due to a redundant assertion. (Thanks Boqun, Miguel) - Fix some missing safety comments, and remove some unneeded 'unsafe' blocks. (Thanks Boqun) - Fix a couple of minor rustfmt issues which were triggering checkpatch warnings. Changes since v3: https://lore.kernel.org/linux-kselftest/20241030045719.3085147-2-davidgow@g… - The kunit_unsafe_test_suite!() macro now panic!s if the suite name is too long, triggering a compile error. (Thanks, Alice!) - The #[kunit_tests()] macro now preserves span information, so errors can be better reported. (Thanks, Boqun!) - The example tests have been updated to no longer use assert_eq!() with a constant bool argument (which triggered a clippy warning now we have the span info). Changes since v2: https://lore.kernel.org/linux-kselftest/20241029092422.2884505-1-davidgow@g… - Include missing rust/macros/kunit.rs file from v2. (Thanks Boqun!) - The kunit_unsafe_test_suite!() macro will truncate the name of the suite if it is too long. (Thanks Alice!) - The proc macro now emits an error if the suite name is too long. - We no longer needlessly use UnsafeCell<> in kunit_unsafe_test_suite!(). (Thanks Alice!) Changes since v1: https://lore.kernel.org/lkml/20230720-rustbind-v1-0-c80db349e3b5@google.com… - Rebase on top of the latest rust-next (commit 718c4069896c) - Make kunit_case a const fn, rather than a macro (Thanks Boqun) - As a result, the null terminator is now created with kernel::kunit::kunit_case_null() - Use the C kunit_get_current_test() function to implement in_kunit_test(), rather than re-implementing it (less efficiently) ourselves. Changes since the GitHub PR: - Rebased on top of kselftest/kunit - Add const_mut_refs feature This may conflict with https://lore.kernel.org/lkml/20230503090708.2524310-6-nmi@metaspace.dk/ - Add rust/macros/kunit.rs to the KUnit MAINTAINERS entry --- José Expósito (3): rust: kunit: add KUnit case and suite macros rust: macros: add macro to easily run KUnit tests rust: kunit: allow to know if we are in a test MAINTAINERS | 1 + rust/kernel/kunit.rs | 207 +++++++++++++++++++++++++++++++++++++++++++ rust/kernel/lib.rs | 1 + rust/macros/kunit.rs | 168 +++++++++++++++++++++++++++++++++++ rust/macros/lib.rs | 29 ++++++ 5 files changed, 406 insertions(+) create mode 100644 rust/macros/kunit.rs -- 2.47.1.613.gc27f4b7a9f-goog

6 months

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Question about test_xsk.sh

by Alexis Lothoré

Hello all, I was looking at other test candidates for conversion to bpf test_progs framework (to increase automatic testing scope) and found test_xsk.sh, which does not seem to have coverage yet in test_progs. This test validates the AF_XDP socket behavior with different XDP modes (SKB, DRV, zero copy) and socket configuration (normal, busy polling). The testing program looks pretty big, considering all files involved (test_xsk.sh, xskxceiver.c, xsk.c, the different XDP programs) and the matrix of tests it runs. So before really diving into it, I would like to ask: - is it indeed a good/relevant target for integration in test_progs (all tests look like functional tests, so I guess it is) ? - if so, is there anyone already working on this ? - multiple commits on xskxceiver.c hint that the program is also used for testing on real hardware, could someone confirm that it is still the case (similar need has been seen with test_xdp_features.sh for example) ? If so, it means that the current form must be preserved, and it would be an additional integration into test_progs rather a conversion (then most of the code should be shared between the non-test_progs and the test_progs version) Thanks, Alexis -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

6 months

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[PATCH net-next 0/4] netconsole: selftest for userdata overflow

by Breno Leitao

Implement comprehensive testing for netconsole userdata entry handling, demonstrating correct behavior when creating maximum entries and preventing unauthorized overflow. Refactor existing test infrastructure to support modular, reusable helper functions that validate strict entry limit enforcement. Also, add a warning if update_userdata() sees more than MAX_USERDATA_ITEMS entries. This shouldn't happen and it is a bug that shouldn't be silently ignored. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- Breno Leitao (4): netconsole: Warn if MAX_USERDATA_ITEMS limit is exceeded netconsole: selftest: Split the helpers from the selftest netconsole: selftest: Delete all userdata keys netconsole: selftest: verify userdata entry limit MAINTAINERS | 3 +- drivers/net/netconsole.c | 2 +- .../selftests/drivers/net/lib/sh/lib_netcons.sh | 225 +++++++++++++++++++++ .../testing/selftests/drivers/net/netcons_basic.sh | 218 +------------------- .../selftests/drivers/net/netcons_overflow.sh | 67 ++++++ 5 files changed, 296 insertions(+), 219 deletions(-) --- base-commit: bb18265c3aba92b91a1355609769f3e967b65dee change-id: 20241204-netcons_overflow_test-eaf735d1f743 Best regards, -- Breno Leitao <leitao(a)debian.org>

6 months

2
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