August 2023 - Linux-kselftest-mirror

[PATCH 0/3] Avoid TCP resets when using ECMP for load-balancing between multiple servers.

by Sriram Yagnaraman

All packets in the same flow (L3/L4 depending on multipath hash policy) should be directed to the same target, but after [0]/[1] we see stray packets directed towards other targets. This, for instance, causes RST to be sent on TCP connections. The first two patches solve the problem by ignoring route hints for destinations that are part of multipath group, by using new SKB flags for IPv4 and IPv6. The third patch is a selftest that tests the scenario. Thanks to Ido, for reviewing and suggesting a way forward in [2]. [0]: commit 02b24941619f ("ipv4: use dst hint for ipv4 list receive") [1]: commit 197dbf24e360 ("ipv6: introduce and uses route look hints for list input.") [2]: https://lore.kernel.org/netdev/20230815201048.1796-1-sriram.yagnaraman@est.… Sriram Yagnaraman (3): ipv4: ignore dst hint for multipath routes ipv6: ignore dst hint for multipath routes selftests: forwarding: Add test for load-balancing between multiple servers include/linux/ipv6.h | 1 + include/net/ip.h | 1 + net/ipv4/ip_input.c | 3 +- net/ipv4/route.c | 1 + net/ipv6/ip6_input.c | 3 +- net/ipv6/route.c | 2 + .../testing/selftests/net/forwarding/Makefile | 1 + .../net/forwarding/router_multipath_vip.sh | 403 ++++++++++++++++++ 8 files changed, 413 insertions(+), 2 deletions(-) create mode 100755 tools/testing/selftests/net/forwarding/router_multipath_vip.sh -- 2.34.1

1 year, 4 months

2
8
0 0

Re: [PATCH v3 3/3] selftests/tdx: Test GetQuote TDX attestation feature

by Thomas Gleixner

On Thu, Jun 22 2023 at 14:01, Erdem Aktas wrote: > On Mon, Jun 12, 2023 at 12:03 PM Dan Williams <dan.j.williams(a)intel.com> > wrote: >> Now multiple >> confidential computing vendors trying to develop similar flows with >> differentiated formats where that differentiation need not leak over the >> ABI boundary. >> > > <Just my personal opinion below> > I agree with this statement in the high level but it is also somehow > surprising for me after all the discussion happened around this topic. > Honestly, I feel like there are multiple versions of "Intel" working in > different directions. > > If we want multiple vendors trying to do the similar things behind a common > ABI, it should start with the spec. Since this comment is coming from > Intel, I wonder if there is any plan to combine the GHCB and GHCI > interfaces under common ABI in the future or why it did not even happen in > the first place. You are conflating things here. The GETQUOTE TDVMCALL interface is part of the Guest-Hypervisor Communication Interface (GHCI), which is a firmware interface. Firmware (likewise hardware) interfaces have the unfortunate property that they are mostly cast in stone. But that has absolutely nothing to do with the way how the kernel implements support for them. If we'd follow your reasoning then we'd have a gazillion of vendor specific SCSI stacks in the kernel. > What I see is that Intel has GETQUOTE TDVMCALL interface in its spec and > again Intel does not really want to provide support for it in linux. It > feels really frustrating. Intel definitely wants to provide support for this interface and this very thread is about that support. But Intel is not in a position to define what the kernel community has to accept or not, neither is Google. Sure, it would have been more efficient to come up with a better interface earlier, but that's neither an Intel nor a TDX specific problem. It's just how kernel development works. Some ideas look good on first sight, some stuff slips through and at some point the maintainers realize that this is not the way to go and request a proper generalized and maintainable implementation. If you can provide compelling technical reasons why the IOCTL is the better and more maintainable approach for the kernel, then we are all ears and happy to debate that on the technical level. Feel free to be frustrated, but I can assure you that the only way to resolve this dilemma is to sit down and actually get work done in a way which is acceptable by the kernel community at the technical level. Everything else is frustrating for everyone involved, not only you. Thanks, tglx

1 year, 4 months

1
0
0 0

[PATCH] selftests: alsa: make LDLIBS consistent

by Ricardo B. Marliere

In kselftest_deps.sh script, the level 3 parser is broken for the alsa subsystem Makefile. Output before patch: $ ./kselftest_deps.sh gcc alsa ======================================================== Kselftest Dependency Check for [./kselftest_deps.sh gcc alsa] results... ======================================================== Checked tests defining LDLIBS dependencies -------------------------------------------------------- Total tests with Dependencies: 6 Pass: 2 Fail: 4 -------------------------------------------------------- PASS: alsa/Makefile dependency check passed -lasound PASS: alsa/Makefile dependency check passed -lpthread -------------------------------------------------------- Targets passed build dependency check on system: alsa -------------------------------------------------------- FAIL: alsa/Makefile dependency check: $(shell FAIL: alsa/Makefile dependency check: pkg-config FAIL: alsa/Makefile dependency check: --libs FAIL: alsa/Makefile dependency check: alsa) -------------------------------------------------------- Targets failed build dependency check on system: alsa -------------------------------------------------------- Missing libraries system $(shell alsa) --libs pkg-config -------------------------------------------------------- ======================================================== Output after patch: $ ./kselftest_deps.sh gcc alsa ======================================================== Kselftest Dependency Check for [./kselftest_deps.sh gcc alsa] results... ======================================================== Checked tests defining LDLIBS dependencies -------------------------------------------------------- Total tests with Dependencies: 2 Pass: 2 Fail: 0 -------------------------------------------------------- PASS: alsa/Makefile dependency check passed -lasound PASS: alsa/Makefile dependency check passed -lpthread -------------------------------------------------------- Targets passed build dependency check on system: alsa -------------------------------------------------------- ======================================================== Signed-off-by: Ricardo B. Marliere <rbmarliere(a)gmail.com> --- tools/testing/selftests/alsa/Makefile | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile index 5af9ba8a4645..b5670049c4e5 100644 --- a/tools/testing/selftests/alsa/Makefile +++ b/tools/testing/selftests/alsa/Makefile @@ -2,13 +2,13 @@ # CFLAGS += $(shell pkg-config --cflags alsa) -LDLIBS += $(shell pkg-config --libs alsa) -ifeq ($(LDLIBS),) -LDLIBS += -lasound +VAR_LDLIBS += $(shell pkg-config --libs alsa) +ifeq ($(VAR_LDLIBS),) +VAR_LDLIBS += -lasound endif CFLAGS += -L$(OUTPUT) -Wl,-rpath=./ -LDLIBS+=-lpthread +VAR_LDLIBS+=-lpthread OVERRIDE_TARGETS = 1 @@ -21,7 +21,7 @@ TEST_FILES := conf.d pcm-test.conf include ../lib.mk $(OUTPUT)/libatest.so: conf.c alsa-local.h - $(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@ + $(CC) $(CFLAGS) -shared -fPIC $< $(VAR_LDLIBS) -o $@ $(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) alsa-local.h - $(CC) $(CFLAGS) $< $(LDLIBS) -latest -o $@ + $(CC) $(CFLAGS) $< $(VAR_LDLIBS) -latest -o $@ -- 2.40.1

1 year, 4 months

3
2
0 0

[PATCH] selftests: fix dependency checker script

by Ricardo B. Marliere

This patch fixes inconsistencies in the parsing rules of the levels 1 and 2 of the kselftest_deps.sh. It was added the levels 4 and 5 to account for a few edge cases that are present in some tests, also some minor identation styling have been fixed (s/ /\t/g). Signed-off-by: Ricardo B. Marliere <rbmarliere(a)gmail.com> --- tools/testing/selftests/kselftest_deps.sh | 77 +++++++++++++++++++---- 1 file changed, 65 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/kselftest_deps.sh b/tools/testing/selftests/kselftest_deps.sh index 4bc14d9e8ff1..de59cc8f03c3 100755 --- a/tools/testing/selftests/kselftest_deps.sh +++ b/tools/testing/selftests/kselftest_deps.sh @@ -46,11 +46,11 @@ fi print_targets=0 while getopts "p" arg; do - case $arg in - p) + case $arg in + p) print_targets=1 shift;; - esac + esac done if [ $# -eq 0 ] @@ -92,6 +92,10 @@ pass_cnt=0 # Get all TARGETS from selftests Makefile targets=$(grep -E "^TARGETS +|^TARGETS =" Makefile | cut -d "=" -f2) +# Initially, in LDLIBS related lines, the dep checker needs +# to ignore lines containing the following strings: +filter="\$(VAR_LDLIBS)\|pkg-config\|PKG_CONFIG\|IOURING_EXTRA_LIBS" + # Single test case if [ $# -eq 2 ] then @@ -100,6 +104,8 @@ then l1_test $test l2_test $test l3_test $test + l4_test $test + l5_test $test print_results $1 $2 exit $? @@ -113,7 +119,7 @@ fi # Append space at the end of the list to append more tests. l1_tests=$(grep -r --include=Makefile "^LDLIBS" | \ - grep -v "VAR_LDLIBS" | awk -F: '{print $1}') + grep -v "$filter" | awk -F: '{print $1}' | uniq) # Level 2: LDLIBS set dynamically. # @@ -126,7 +132,7 @@ l1_tests=$(grep -r --include=Makefile "^LDLIBS" | \ # Append space at the end of the list to append more tests. l2_tests=$(grep -r --include=Makefile ": LDLIBS" | \ - grep -v "VAR_LDLIBS" | awk -F: '{print $1}') + grep -v "$filter" | awk -F: '{print $1}' | uniq) # Level 3 # memfd and others use pkg-config to find mount and fuse libs @@ -138,11 +144,32 @@ l2_tests=$(grep -r --include=Makefile ": LDLIBS" | \ # VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null) l3_tests=$(grep -r --include=Makefile "^VAR_LDLIBS" | \ - grep -v "pkg-config" | awk -F: '{print $1}') + grep -v "pkg-config\|PKG_CONFIG" | awk -F: '{print $1}' | uniq) -#echo $l1_tests -#echo $l2_1_tests -#echo $l3_tests +# Level 4 +# some tests may fall back to default using `|| echo -l<libname>` +# if pkg-config doesn't find the libs, instead of using VAR_LDLIBS +# as per level 3 checks. +# e.g: +# netfilter/Makefile +# LDLIBS += $(shell $(HOSTPKG_CONFIG) --libs libmnl 2>/dev/null || echo -lmnl) +l4_tests=$(grep -r --include=Makefile "^LDLIBS" | \ + grep "pkg-config\|PKG_CONFIG" | awk -F: '{print $1}' | uniq) + +# Level 5 +# some tests may use IOURING_EXTRA_LIBS to add extra libs to LDLIBS, +# which in turn may be defined in a sub-Makefile +# e.g.: +# mm/Makefile +# $(OUTPUT)/gup_longterm: LDLIBS += $(IOURING_EXTRA_LIBS) +l5_tests=$(grep -r --include=Makefile "LDLIBS +=.*\$(IOURING_EXTRA_LIBS)" | \ + awk -F: '{print $1}' | uniq) + +#echo l1_tests $l1_tests +#echo l2_tests $l2_tests +#echo l3_tests $l3_tests +#echo l4_tests $l4_tests +#echo l5_tests $l5_tests all_tests print_results $1 $2 @@ -164,24 +191,32 @@ all_tests() for test in $l3_tests; do l3_test $test done + + for test in $l4_tests; do + l4_test $test + done + + for test in $l5_tests; do + l5_test $test + done } # Use same parsing used for l1_tests and pick libraries this time. l1_test() { test_libs=$(grep --include=Makefile "^LDLIBS" $test | \ - grep -v "VAR_LDLIBS" | \ + grep -v "$filter" | \ sed -e 's/\:/ /' | \ sed -e 's/+/ /' | cut -d "=" -f 2) check_libs $test $test_libs } -# Use same parsing used for l2__tests and pick libraries this time. +# Use same parsing used for l2_tests and pick libraries this time. l2_test() { test_libs=$(grep --include=Makefile ": LDLIBS" $test | \ - grep -v "VAR_LDLIBS" | \ + grep -v "$filter" | \ sed -e 's/\:/ /' | sed -e 's/+/ /' | \ cut -d "=" -f 2) @@ -197,6 +232,24 @@ l3_test() check_libs $test $test_libs } +l4_test() +{ + test_libs=$(grep --include=Makefile "^VAR_LDLIBS\|^LDLIBS" $test | \ + grep "$pkg-config\|PKG_CONFIG$.*|| echo " | \ + sed -e 's/.*|| echo //' | sed -e 's/)$//') + + check_libs $test $test_libs +} + +l5_test() +{ + tests=$(find $(dirname "$test") -type f -name "*.mk") + test_libs=$(grep "^IOURING_EXTRA_LIBS +\?=" $tests | \ + cut -d "=" -f 2) + + check_libs $test $test_libs +} + check_libs() { -- 2.40.1

1 year, 4 months

1
0
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[PATCH v5 00/37] arm64/gcs: Provide support for GCS in userspace

by Mark Brown

The arm64 Guarded Control Stack (GCS) feature provides support for hardware protected stacks of return addresses, intended to provide hardening against return oriented programming (ROP) attacks and to make it easier to gather call stacks for applications such as profiling. When GCS is active a secondary stack called the Guarded Control Stack is maintained, protected with a memory attribute which means that it can only be written with specific GCS operations. The current GCS pointer can not be directly written to by userspace. When a BL is executed the value stored in LR is also pushed onto the GCS, and when a RET is executed the top of the GCS is popped and compared to LR with a fault being raised if the values do not match. GCS operations may only be performed on GCS pages, a data abort is generated if they are not. The combination of hardware enforcement and lack of extra instructions in the function entry and exit paths should result in something which has less overhead and is more difficult to attack than a purely software implementation like clang's shadow stacks. This series implements support for use of GCS by userspace, along with support for use of GCS within KVM guests. It does not enable use of GCS by either EL1 or EL2, this will be implemented separately. Executables are started without GCS and must use a prctl() to enable it, it is expected that this will be done very early in application execution by the dynamic linker or other startup code. For dynamic linking this will be done by checking that everything in the executable is marked as GCS compatible. x86 has an equivalent feature called shadow stacks, this series depends on the x86 patches for generic memory management support for the new guarded/shadow stack page type and shares APIs as much as possible. As there has been extensive discussion with the wider community around the ABI for shadow stacks I have as far as practical kept implementation decisions close to those for x86, anticipating that review would lead to similar conclusions in the absence of strong reasoning for divergence. The main divergence I am concious of is that x86 allows shadow stack to be enabled and disabled repeatedly, freeing the shadow stack for the thread whenever disabled, while this implementation keeps the GCS allocated after disable but refuses to reenable it. This is to avoid races with things actively walking the GCS during a disable, we do anticipate that some systems will wish to disable GCS at runtime but are not aware of any demand for subsequently reenabling it. x86 uses an arch_prctl() to manage enable and disable, since only x86 and S/390 use arch_prctl() a generic prctl() was proposed[1] as part of a patch set for the equivalent RISC-V zisslpcfi feature which I initially adopted fairly directly but following review feedback has been revised quite a bit. There is an open issue with support for CRIU, on x86 this required the ability to set the GCS mode via ptrace. This series supports configuring mode bits other than enable/disable via ptrace but it needs to be confirmed if this is sufficient. There's a few bits where I'm not convinced with where I've placed things, in particular the GCS write operation is in the GCS header not in uaccess.h, I wasn't sure what was clearest there and am probably too close to the code to have a clear opinion. The reporting of GCS in /proc/PID/smaps is also a bit awkward. The series depends on the x86 shadow stack support: https://lore.kernel.org/lkml/20230227222957.24501-1-rick.p.edgecombe@intel.… I've rebased this onto v6.5-rc4 but not included it in the series in order to avoid confusion with Rick's work and cut down the size of the series, you can see the branch at: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git arm64-gcs [1] https://lore.kernel.org/lkml/20230213045351.3945824-1-debug@rivosinc.com/ Pending feedback from Catalin: - Switch copy_to_user_gcs() to be put_user_gcs(). Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v5: - Don't map any permissions for user GCSs, we always use EL0 accessors or use a separate mapping of the page. - Reduce the standard size of the GCS to RLIMIT_STACK/2. - Enforce a PAGE_SIZE alignment requirement on map_shadow_stack(). - Clarifications and fixes to documentation. - More tests. - Link to v4: https://lore.kernel.org/r/20230807-arm64-gcs-v4-0-68cfa37f9069@kernel.org Changes in v4: - Implement flags for map_shadow_stack() allowing the cap and end of stack marker to be enabled independently or not at all. - Relax size and alignment requirements for map_shadow_stack(). - Add more blurb explaining the advantages of hardware enforcement. - Link to v3: https://lore.kernel.org/r/20230731-arm64-gcs-v3-0-cddf9f980d98@kernel.org Changes in v3: - Rebase onto v6.5-rc4. - Add a GCS barrier on context switch. - Add a GCS stress test. - Link to v2: https://lore.kernel.org/r/20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org Changes in v2: - Rebase onto v6.5-rc3. - Rework prctl() interface to allow each bit to be locked independently. - map_shadow_stack() now places the cap token based on the size requested by the caller not the actual space allocated. - Mode changes other than enable via ptrace are now supported. - Expand test coverage. - Various smaller fixes and adjustments. - Link to v1: https://lore.kernel.org/r/20230716-arm64-gcs-v1-0-bf567f93bba6@kernel.org --- Mark Brown (37): arm64/mm: Restructure arch_validate_flags() for extensibility prctl: arch-agnostic prctl for shadow stack arm64: Document boot requirements for Guarded Control Stacks arm64/gcs: Document the ABI for Guarded Control Stacks arm64/sysreg: Add new system registers for GCS arm64/sysreg: Add definitions for architected GCS caps arm64/gcs: Add manual encodings of GCS instructions arm64/gcs: Provide copy_to_user_gcs() arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) arm64/mm: Allocate PIE slots for EL0 guarded control stack mm: Define VM_SHADOW_STACK for arm64 when we support GCS arm64/mm: Map pages for guarded control stack KVM: arm64: Manage GCS registers for guests arm64/gcs: Allow GCS usage at EL0 and EL1 arm64/idreg: Add overrride for GCS arm64/hwcap: Add hwcap for GCS arm64/traps: Handle GCS exceptions arm64/mm: Handle GCS data aborts arm64/gcs: Context switch GCS state for EL0 arm64/gcs: Allocate a new GCS for threads with GCS enabled arm64/gcs: Implement shadow stack prctl() interface arm64/mm: Implement map_shadow_stack() arm64/signal: Set up and restore the GCS context for signal handlers arm64/signal: Expose GCS state in signal frames arm64/ptrace: Expose GCS via ptrace and core files arm64: Add Kconfig for Guarded Control Stack (GCS) kselftest/arm64: Verify the GCS hwcap kselftest/arm64: Add GCS as a detected feature in the signal tests kselftest/arm64: Add framework support for GCS to signal handling tests kselftest/arm64: Allow signals tests to specify an expected si_code kselftest/arm64: Always run signals tests with GCS enabled kselftest/arm64: Add very basic GCS test program kselftest/arm64: Add a GCS test program built with the system libc kselftest/arm64: Add test coverage for GCS mode locking selftests/arm64: Add GCS signal tests kselftest/arm64: Add a GCS stress test kselftest/arm64: Enable GCS for the FP stress tests Documentation/admin-guide/kernel-parameters.txt | 3 + Documentation/arch/arm64/booting.rst | 22 + Documentation/arch/arm64/elf_hwcaps.rst | 3 + Documentation/arch/arm64/gcs.rst | 233 +++++++ Documentation/arch/arm64/index.rst | 1 + Documentation/filesystems/proc.rst | 2 +- arch/arm64/Kconfig | 19 + arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/el2_setup.h | 17 + arch/arm64/include/asm/esr.h | 28 +- arch/arm64/include/asm/exception.h | 2 + arch/arm64/include/asm/gcs.h | 106 +++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/kvm_arm.h | 4 +- arch/arm64/include/asm/kvm_host.h | 12 + arch/arm64/include/asm/mman.h | 20 +- arch/arm64/include/asm/pgtable-prot.h | 14 +- arch/arm64/include/asm/processor.h | 7 + arch/arm64/include/asm/sysreg.h | 20 + arch/arm64/include/asm/uaccess.h | 42 ++ arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/ptrace.h | 8 + arch/arm64/include/uapi/asm/sigcontext.h | 9 + arch/arm64/kernel/cpufeature.c | 19 + arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/entry-common.c | 23 + arch/arm64/kernel/idreg-override.c | 2 + arch/arm64/kernel/process.c | 89 +++ arch/arm64/kernel/ptrace.c | 59 ++ arch/arm64/kernel/signal.c | 237 ++++++- arch/arm64/kernel/traps.c | 11 + arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 17 + arch/arm64/kvm/sys_regs.c | 22 + arch/arm64/mm/Makefile | 1 + arch/arm64/mm/fault.c | 79 ++- arch/arm64/mm/gcs.c | 225 +++++++ arch/arm64/mm/mmap.c | 13 +- arch/arm64/tools/cpucaps | 1 + arch/arm64/tools/sysreg | 55 ++ fs/proc/task_mmu.c | 3 + include/linux/mm.h | 16 +- include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 5 +- include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 22 + kernel/sys.c | 30 + kernel/sys_ni.c | 1 + tools/testing/selftests/arm64/Makefile | 2 +- tools/testing/selftests/arm64/abi/hwcap.c | 19 + tools/testing/selftests/arm64/fp/assembler.h | 15 + tools/testing/selftests/arm64/fp/fpsimd-test.S | 2 + tools/testing/selftests/arm64/fp/sve-test.S | 2 + tools/testing/selftests/arm64/fp/za-test.S | 2 + tools/testing/selftests/arm64/fp/zt-test.S | 2 + tools/testing/selftests/arm64/gcs/.gitignore | 5 + tools/testing/selftests/arm64/gcs/Makefile | 24 + tools/testing/selftests/arm64/gcs/asm-offsets.h | 0 tools/testing/selftests/arm64/gcs/basic-gcs.c | 356 ++++++++++ tools/testing/selftests/arm64/gcs/gcs-locking.c | 200 ++++++ .../selftests/arm64/gcs/gcs-stress-thread.S | 311 +++++++++ tools/testing/selftests/arm64/gcs/gcs-stress.c | 532 +++++++++++++++ tools/testing/selftests/arm64/gcs/gcs-util.h | 100 +++ tools/testing/selftests/arm64/gcs/libc-gcs.c | 742 +++++++++++++++++++++ tools/testing/selftests/arm64/signal/.gitignore | 1 + .../testing/selftests/arm64/signal/test_signals.c | 17 +- .../testing/selftests/arm64/signal/test_signals.h | 6 + .../selftests/arm64/signal/test_signals_utils.c | 32 +- .../selftests/arm64/signal/test_signals_utils.h | 39 ++ .../arm64/signal/testcases/gcs_exception_fault.c | 59 ++ .../selftests/arm64/signal/testcases/gcs_frame.c | 78 +++ .../arm64/signal/testcases/gcs_write_fault.c | 67 ++ .../selftests/arm64/signal/testcases/testcases.c | 7 + .../selftests/arm64/signal/testcases/testcases.h | 1 + 73 files changed, 4096 insertions(+), 38 deletions(-) --- base-commit: e514f673179ed8af6c64d79f8d43e2569ad6cb9f change-id: 20230303-arm64-gcs-e311ab0d8729 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year, 4 months

4
42
0 0

[PATCH v2 0/2] selftests: cachestat: fix run on older kernels

by Andre Przywara

I ran all kernel selftests on some test machine, and stumbled upon cachestat failing (among others). These patches fix the run on older kernels and when the current directory is on a tmpfs instance. I dropped the first two fix patches from v1, since Shuah applied those already. [PATCH v2 1/2] is almost the same as [PATCH 3/3] from v1, but using the proper skip function from kselftest.h. I am not sure if Shuah applied that already, if yes, it's not a big problem, the output is the same. Patch 2/2 implements the tmpfs detection that Nhat suggested the last time (many thanks for pointing me to statfs and the magics!). Cheers, Andre Andre Przywara (2): selftests: cachestat: test for cachestat availability selftests: cachestat: catch failing fsync test on tmpfs .../selftests/cachestat/test_cachestat.c | 80 +++++++++++++++---- 1 file changed, 65 insertions(+), 15 deletions(-) -- 2.25.1

1 year, 4 months

2
4
0 0

[PATCH] selftests: Keep symlinks, when possible

by Björn Töpel

From: Björn Töpel <bjorn(a)rivosinc.com> When kselftest is built/installed with the 'gen_tar' target, rsync is used for the installation step to copy files. Extra care is needed for tests that have symlinks. Commit ae108c48b5d2 ("selftests: net: Fix cross-tree inclusion of scripts") added '-L' (transform symlink into referent file/dir) to rsync, to fix dangling links. However, that broke some tests where the symlink (being a symlink) is part of the test (e.g. exec:execveat). Use rsync's '--copy-unsafe-links' that does right thing. Fixes: ae108c48b5d2 ("selftests: net: Fix cross-tree inclusion of scripts") Signed-off-by: Björn Töpel <bjorn(a)rivosinc.com> --- tools/testing/selftests/lib.mk | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index d17854285f2b..118e0964bda9 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -106,7 +106,7 @@ endef run_tests: all ifdef building_out_of_srctree @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then \ - rsync -aLq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \ + rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \ fi @if [ "X$(TEST_PROGS)" != "X" ]; then \ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \ @@ -120,7 +120,7 @@ endif define INSTALL_SINGLE_RULE $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)) - $(if $(INSTALL_LIST),rsync -aL $(INSTALL_LIST) $(INSTALL_PATH)/) + $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/) endef define INSTALL_RULE base-commit: f7757129e3dea336c407551c98f50057c22bb266 -- 2.39.2

1 year, 4 months

2
1
0 0

[PATCH v4 00/10] kunit: Add dynamically-extending log

by Richard Fitzgerald

This patch chain changes the logging implementation to use string_stream so that the log will grow dynamically. The first 8 patches add test code for string_stream, and make some changes to string_stream needed to be able to use it for the log. The final patch adds a performance report of string_stream. CHANGES SINCE V3: Completely rewritten to use string_stream instead of implementing a separate extending-buffer implementation for logging. I have used the performance test from the final patch on my original fixed-size-fragment implementation from V3 to get a comparison of the two implementations (run on i3-8145UE CPU @ 2.20GHz): string_stream V3 fixed-size-buffer Time elapsed: 7748 us 3251 us Total string length: 573890 573890 Bytes requested: 823994 728336 Actual bytes allocated: 1061440 728352 I don't think the difference is enough to be worth complicating the string_stream implementation with my fixed-fragment implementation from V3 of this patch chain. Richard Fitzgerald (10): kunit: string-stream: Improve testing of string_stream kunit: string-stream: Don't create a fragment for empty strings kunit: string-stream: Add cases for adding empty strings to a string_stream kunit: string-stream: Add option to make all lines end with newline kunit: string-stream: Add cases for string_stream newline appending kunit: string-stream: Pass struct kunit to string_stream_get_string() kunit: string-stream: Decouple string_stream from kunit kunit: string-stream: Add test for freeing resource-managed string_stream kunit: Use string_stream for test log kunit: string-stream: Test performance of string_stream include/kunit/test.h | 14 +- lib/kunit/Makefile | 5 +- lib/kunit/debugfs.c | 36 ++- lib/kunit/kunit-test.c | 52 +--- lib/kunit/log-test.c | 72 ++++++ lib/kunit/string-stream-test.c | 447 +++++++++++++++++++++++++++++++-- lib/kunit/string-stream.c | 129 +++++++--- lib/kunit/string-stream.h | 22 +- lib/kunit/test.c | 48 +--- 9 files changed, 656 insertions(+), 169 deletions(-) create mode 100644 lib/kunit/log-test.c -- 2.30.2

1 year, 4 months

4
32
0 0

clang-17: selftests: sgx: clang: error: -z noexecstack: 'linker' input unused [-Werror,-Wunused-command-line-argument]

by Naresh Kamboju

Recently we have updated the toolchain clang-17 version. While building selftests sgx following warnings / errors noticed on the Linux next with clang-17. Reported-by: Linux Kernel Functional Testing <lkft(a)linaro.org> sgx/main.o clang: error: -z noexecstack: 'linker' input unused [-Werror,-Wunused-command-line-argument] Links: - https://storage.tuxsuite.com/public/linaro/lkft/builds/2UHhSg0TPLhjp9Uq9EFc… Steps to reproduce: - https://storage.tuxsuite.com/public/linaro/lkft/builds/2UHhSg0TPLhjp9Uq9EFc… tuxmake --runtime podman --target-arch x86_64 --toolchain clang-17 --kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2UHhSg0TPLhjp9Uq9EFc… LLVM=1 LLVM_IAS=1 debugkernel cpupower headers kernel kselftest modules -- Linaro LKFT https://lkft.linaro.org

1 year, 4 months

2
1
0 0

landlock: fs_test: fs_test.c:4524:9: error: initializer element is not a compile-time constant

by Naresh Kamboju

While building selftests landlock following warnings / errors noticed on the Linux next with clang-17. Reported-by: Linux Kernel Functional Testing <lkft(a)linaro.org> Build errors: ------------ landlock/fs_test fs_test.c:4524:9: error: initializer element is not a compile-time constant 4524 | .mnt = mnt_tmp, | ^~~~~~~ 1 error generated. Links: - https://storage.tuxsuite.com/public/linaro/lkft/builds/2U69ue7AaypfY7eRU4UU… Steps to reproduce: tuxmake --runtime podman --target-arch arm64 --toolchain clang-17 --kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2U69ue7AaypfY7eRU4UU… LLVM=1 LLVM_IAS=1 dtbs dtbs-legacy headers kernel kselftest modules -- Linaro LKFT https://lkft.linaro.org

1 year, 4 months

2
4
0 0

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Linux-kselftest-mirror August 2023