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[PATCH v4 00/19] tracing: probeevent: Improve fetcharg features

by Masami Hiramatsu

Hi, This is the 4th version of the fetch-arg improvement series. This includes variable changes on fetcharg framework like, - Add fetcharg testcases (syntax, argN, symbol, string and array) and probepoint testcase. - Rewrite fetcharg framework with fetch_insn, switch-case based instead of function pointer. - Add "symbol" type support, which shows symbol+offset instead of address value. - Add "$argN" fetcharg, which fetches function parameters. (currently only for x86-64) - Add array type support (including string arrary :) ) , which enables to get fixed length array from probe-events. V3 is here: https://lkml.org/lkml/2018/2/24/3 Changes from the v3 are here: - [1/19] Fix to pass a sign to kstrtol (Thanks Namhyung!) and check UINT_MAX for kprobe's offset. - [4/19] Add new testcase for checking probepoint syntax. - [16/19] Fix to use calculated size correctly for field definition. (Thank you Namhyung!). - [19/19] Add format field tests. Here are examples: o 'symbol' type # echo 'p vfs_read $stack0:symbol' > kprobe_events # echo 1 > events/kprobes/p_vfs_read_0/enable # tail -n 3 trace sh-729 [007] ...2 105.753637: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=SyS_read+0x42/0x90 tail-736 [000] ...2 105.754904: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=kernel_read+0x2c/0x40 tail-736 [000] ...2 105.754929: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=kernel_read+0x2c/0x40 o $argN # echo 'p vfs_read $arg0 $arg1 $arg2' > kprobe_events # echo 1 > events/kprobes/p_vfs_read_0/enable # tail -n 3 trace sh-726 [007] ...2 134.288973: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=0xffff88001d98ec00 arg2=0x7ffeb4330f79 arg3=0x1 tail-731 [000] ...2 134.289987: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=0xffff88001d9dd200 arg2=0xffff88001d8a0a00 arg3=0x80 tail-731 [000] ...2 134.290016: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=0xffff88001d9dd200 arg2=0xffff88001faf4a00 arg3=0x150 o Array type # echo 'p vfs_read +0($stack):x64 +0($stack):x8[8]' > kprobe_events # echo 1 > events/kprobes/p_vfs_read_0/enable # tail -n 3 trace sh-729 [007] ...2 91.701664: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=0xffffffff811b1252 arg2={0x52,0x12,0x1b,0x81,0xff,0xff,0xff,0xff} tail-734 [000] ...2 91.702366: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=0xffffffff811b0dec arg2={0xec,0xd,0x1b,0x81,0xff,0xff,0xff,0xff} tail-734 [000] ...2 91.702386: p_vfs_read_0: (vfs_read+0x0/0x130) arg1=0xffffffff811b0dec arg2={0xec,0xd,0x1b,0x81,0xff,0xff,0xff,0xff} # # cat events/kprobes/p_vfs_read_0/format name: p_vfs_read_0 ID: 1069 format: field:unsigned short common_type; offset:0; size:2; signed:0; field:unsigned char common_flags; offset:2; size:1; signed:0; field:unsigned char common_preempt_count; offset:3; size:1; signed:0; field:int common_pid; offset:4; size:4; signed:1; field:unsigned long __probe_ip; offset:8; size:8; signed:0; field:u64 arg1; offset:16; size:0; signed:0; field:u8 arg2[8]; offset:24; size:8; signed:0; print fmt: "(%lx) arg1=0x%Lx arg2={0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x}", REC->__probe_ip, REC->arg1, REC->arg2[0], REC->arg2[1], REC->arg2[2], REC->arg2[3], REC->arg2[4], REC->arg2[5], REC->arg2[6], REC->arg2[7] o String Array type # echo "p create_trace_kprobe arg1=+0(%si):string[3]" > kprobe_events # echo test1 test2 test3 >> kprobe_events sh: write error: Invalid argument # echo 'p vfs_read $stack' >> kprobe_events # tail -n 2 trace sh-744 [007] ...1 183.382407: p_create_trace_kprobe_0: (create_trace_kprobe+0x0/0x890) arg1={"test1","test2","test3"} sh-744 [007] ...1 230.487809: p_create_trace_kprobe_0: (create_trace_kprobe+0x0/0x890) arg1={"p","vfs_read","$stack"} Thank you, --- Masami Hiramatsu (19): [BUGFIX] tracing: probeevent: Fix to support minus offset from symbol selftests: ftrace: Add probe event argument syntax testcase selftests: ftrace: Add a testcase for string type with kprobe_event selftests: ftrace: Add a testcase for probepoint tracing: probeevent: Cleanup print argument functions tracing: probeevent: Cleanup argument field definition tracing: probeevent: Remove NOKPROBE_SYMBOL from print functions tracing: probeevent: Introduce new argument fetching code tracing: probeevent: Unify fetch type tables tracing: probeevent: Return consumed bytes of dynamic area tracing: probeevent: Append traceprobe_ for exported function tracing: probeevent: Unify fetch_insn processing common part tracing: probeevent: Add symbol type x86: ptrace: Add function argument access API tracing: probeevent: Add $argN for accessing function args tracing: probeevent: Add array type support selftests: ftrace: Add a testcase for symbol type selftests: ftrace: Add a testcase for $argN with kprobe_event selftests: ftrace: Add a testcase for array type with kprobe_event Documentation/trace/kprobetrace.txt | 26 + arch/Kconfig | 7 arch/x86/Kconfig | 1 arch/x86/include/asm/ptrace.h | 38 + kernel/trace/trace.c | 9 kernel/trace/trace_kprobe.c | 366 ++++-------- kernel/trace/trace_probe.c | 628 +++++++++----------- kernel/trace/trace_probe.h | 284 +++------ kernel/trace/trace_probe_tmpl.h | 214 +++++++ kernel/trace/trace_uprobe.c | 168 ++--- .../ftrace/test.d/kprobe/kprobe_args_argN.tc | 25 + .../ftrace/test.d/kprobe/kprobe_args_array.tc | 92 +++ .../ftrace/test.d/kprobe/kprobe_args_string.tc | 46 + .../ftrace/test.d/kprobe/kprobe_args_symbol.tc | 77 ++ .../ftrace/test.d/kprobe/kprobe_args_syntax.tc | 97 +++ .../selftests/ftrace/test.d/kprobe/probepoint.tc | 43 + 16 files changed, 1230 insertions(+), 891 deletions(-) create mode 100644 kernel/trace/trace_probe_tmpl.h create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_array.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_string.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_syntax.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc -- Masami Hiramatsu (Linaro) <mhiramat(a)kernel.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
25
0 0

[PATCH v2] selftests/vm/run_vmtests: adjust hugetlb size accroding to nr_cpus

by Li Zhijian

Fix userfaultfd_hugetlb on hosts which have more than 64 cpus. --------------------------- running userfaultfd_hugetlb --------------------------- invalid MiB Usage: <MiB> <bounces> [FAIL] Via userfaultfd.c we can know, hugetlb_size needs to meet hugetlb_size >= nr_cpus * hugepage_size. hugepage_size is often 2M, so when host cpus > 64, it requires more than 128M. Changes since v1: - update changelog/comments and variable name to make code more easier to read/understand(stolen from Mike Kravetz) Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com Signed-off-by: Li Zhijian <zhijianx.li(a)intel.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: SeongJae Park <sj38.park(a)gmail.com> Cc: Philippe Ombredanne <pombredanne(a)nexb.com> Cc: Aneesh Kumar K.V <aneesh.kumar(a)linux.vnet.ibm.com> Cc: Mike Kravetz <mike.kravetz(a)oracle.com> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- tools/testing/selftests/vm/run_vmtests | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests index d2561895a021a..22d5646738302 100755 --- a/tools/testing/selftests/vm/run_vmtests +++ b/tools/testing/selftests/vm/run_vmtests @@ -2,25 +2,33 @@ # SPDX-License-Identifier: GPL-2.0 #please run as root -#we need 256M, below is the size in kB -needmem=262144 mnt=./huge exitcode=0 -#get pagesize and freepages from /proc/meminfo +#get huge pagesize and freepages from /proc/meminfo while read name size unit; do if [ "$name" = "HugePages_Free:" ]; then freepgs=$size fi if [ "$name" = "Hugepagesize:" ]; then - pgsize=$size + hpgsize_KB=$size fi done < /proc/meminfo +# Simple hugetlbfs tests have a hardcoded minimum requirement of +# huge pages totaling 256MB (262144KB) in size. The userfaultfd +# hugetlb test requires a minimum of 2 * nr_cpus huge pages. Take +# both of these requirements into account and attempt to increase +# number of huge pages available. +nr_cpus=$(nproc) +hpgsize_MB=$((hpgsize_KB / 1024)) +half_ufd_size_MB=$((((nr_cpus * hpgsize_MB + 127) / 128) * 128)) +needmem_KB=$((half_ufd_size_MB * 2 * 1024)) + #set proper nr_hugepages -if [ -n "$freepgs" ] && [ -n "$pgsize" ]; then +if [ -n "$freepgs" ] && [ -n "$hpgsize_KB" ]; then nr_hugepgs=`cat /proc/sys/vm/nr_hugepages` - needpgs=`expr $needmem / $pgsize` + needpgs=$((needmem_KB / hpgsize_KB)) tries=2 while [ $tries -gt 0 ] && [ $freepgs -lt $needpgs ]; do lackpgs=$(( $needpgs - $freepgs )) @@ -107,8 +115,9 @@ fi echo "---------------------------" echo "running userfaultfd_hugetlb" echo "---------------------------" -# 256MB total huge pages == 128MB src and 128MB dst -./userfaultfd hugetlb 128 32 $mnt/ufd_test_file +# Test requires source and destination huge pages. Size of source +# (half_ufd_size_MB) is passed as argument to test. +./userfaultfd hugetlb $half_ufd_size_MB 32 $mnt/ufd_test_file if [ $? -ne 0 ]; then echo "[FAIL]" exitcode=1 -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

1
0
0 0

[PATCH] selftests/vm/run_vmtests: adjust hugetlb size accroding to nr_cpus

by Li Zhijian

this patch is to fix running userfaultfd_hugetlb failed on the host which has more than 64 cpus --------------------------- running userfaultfd_hugetlb --------------------------- invalid MiB Usage: <MiB> <bounces> [FAIL] >From userfaultfd.c we can know, hugetlb_size need to meet hugetlb_size >= nr_cpus * hugepage_size hugepage_size is often 2M, so when host cpus > 64, it requires more than 128M. Signed-off-by: Li Zhijian <zhijianx.li(a)intel.com> --- tools/testing/selftests/vm/run_vmtests | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests index d2561895a021a..c440fb972afe9 100755 --- a/tools/testing/selftests/vm/run_vmtests +++ b/tools/testing/selftests/vm/run_vmtests @@ -2,8 +2,6 @@ # SPDX-License-Identifier: GPL-2.0 #please run as root -#we need 256M, below is the size in kB -needmem=262144 mnt=./huge exitcode=0 @@ -17,6 +15,13 @@ while read name size unit; do fi done < /proc/meminfo +nr_cpus=$(nproc) +pgsize_MB=$((pgsize/1024)) +# rule: nr_cpus * pgsize_MB <= hugetlb_size(round to 128M for testing) +hugetlb_size=$((((nr_cpus*pgsize_MB+127)/128)*128)) +# needmem depends on the nr_cpus, below is the size in kB +needmem=$((hugetlb_size*2*1024)) + #set proper nr_hugepages if [ -n "$freepgs" ] && [ -n "$pgsize" ]; then nr_hugepgs=`cat /proc/sys/vm/nr_hugepages` @@ -107,8 +112,8 @@ fi echo "---------------------------" echo "running userfaultfd_hugetlb" echo "---------------------------" -# 256MB total huge pages == 128MB src and 128MB dst -./userfaultfd hugetlb 128 32 $mnt/ufd_test_file +# 256MB total huge pages == 128MB src and 128MB dst when nr_cpus <= 64 +./userfaultfd hugetlb $hugetlb_size 32 $mnt/ufd_test_file if [ $? -ne 0 ]; then echo "[FAIL]" exitcode=1 -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
1
0 0

[PATCH] selftests: memory-hotplug: fix emit_tests regression

by Shuah Khan

Commit 16c513b13477 ("selftests: memory-hotplug: silence test command echo") introduced regression in emit_tests and results in the following failure when selftests are installed and run. Fix it. Running tests in memory-hotplug ======================================== ./run_kselftest.sh: line 121: @./mem-on-off-test.sh: No such file or directory selftests: memory-hotplug [FAIL] Fixes: 16c513b13477 (selftests: memory-hotplug: silence test command echo") Reported-by: Naresh Kamboju <naresh.kamboju(a)linaro.org> Signed-off-by: Shuah Khan <shuahkh(a)osg.samsung.com> --- tools/testing/selftests/memory-hotplug/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/memory-hotplug/Makefile b/tools/testing/selftests/memory-hotplug/Makefile index 183b46883875..686da510f989 100644 --- a/tools/testing/selftests/memory-hotplug/Makefile +++ b/tools/testing/selftests/memory-hotplug/Makefile @@ -5,7 +5,8 @@ include ../lib.mk TEST_PROGS := mem-on-off-test.sh override RUN_TESTS := @./mem-on-off-test.sh -r 2 && echo "selftests: memory-hotplug [PASS]" || echo "selftests: memory-hotplug [FAIL]" -override EMIT_TESTS := echo "$(RUN_TESTS)" + +override EMIT_TESTS := echo "$(subst @,,$(RUN_TESTS))" run_full_test: @/bin/bash ./mem-on-off-test.sh && echo "memory-hotplug selftests: [PASS]" || echo "memory-hotplug selftests: [FAIL]" -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
2
0 0

[PATCH v2 net-next 0/4] selftests: forwarding: misc bug fixes and enhancements

by David Ahern

Bug fixes and an enhancement for the recent forwarding tests: - only check tc version on tc tests - handle multipath tests failing with 0 packet count - fix ping command for IPv6 on Debian jessie - improve summary of multipath tests v2 - add CHECK_TC to bridge_vlan_aware.sh (Ido) - dropped patch 2; always check for mz given its use - fixed commit message for the last patch (Multipath: was dropped) David Ahern (4): selftests: forwarding: Only check tc version for tc tests selftests: forwarding: Handle 0 for packet difference in multipath tests selftests: forwarding: Use PING6 instead of ping for ipv6 multipath test selftests: forwarding: Add description to the multipath tests .../selftests/net/forwarding/bridge_vlan_aware.sh | 1 + tools/testing/selftests/net/forwarding/lib.sh | 29 ++++++++------ .../selftests/net/forwarding/router_multipath.sh | 46 +++++++++++++--------- .../testing/selftests/net/forwarding/tc_actions.sh | 2 +- .../testing/selftests/net/forwarding/tc_chains.sh | 2 +- .../testing/selftests/net/forwarding/tc_common.sh | 2 + .../testing/selftests/net/forwarding/tc_flower.sh | 2 +- .../selftests/net/forwarding/tc_shblocks.sh | 2 +- 8 files changed, 53 insertions(+), 33 deletions(-) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
5
0 0

[PATCH net-next 0/5] selftests: forwarding: misc bug fixes and enhancements

by David Ahern

Bug fixes and an enhancement for the recent forwarding tests: - only check tc version on tc tests - only check for mz for tests that will use it - handle multipath tests failing with 0 packet count - fix ping command for IPv6 on Debian jessie - improve summary of multipath tests BTW: who is the cruel person that made whitespace 7 spaces in these files? David Ahern (5): selftests: forwarding: Only check tc version for tc tests selftests: forwarding: Only check for mz when it is needed selftests: forwarding: Handle 0 for packet difference in multipath tests selftests: forwarding: Use PING6 instead of ping for ipv6 multipath test selftests: forwarding: Add description to the multipath tests tools/testing/selftests/net/forwarding/lib.sh | 37 ++++++++++------- .../selftests/net/forwarding/router_multipath.sh | 47 +++++++++++++--------- .../testing/selftests/net/forwarding/tc_actions.sh | 2 +- .../testing/selftests/net/forwarding/tc_chains.sh | 2 +- .../testing/selftests/net/forwarding/tc_common.sh | 3 ++ .../testing/selftests/net/forwarding/tc_flower.sh | 2 +- .../selftests/net/forwarding/tc_shblocks.sh | 2 +- 7 files changed, 59 insertions(+), 36 deletions(-) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
14
0 0

[PATCH] selftests: memory-hotplug: silence test command echo

by Shuah Khan

Silence the following command being printed while running test. ./mem-on-off-test.sh -r 2 && echo "selftests: memory-hotplug [PASS]" || echo "selftests: memory-hotplug [FAIL]" Signed-off-by: Shuah Khan <shuahkh(a)osg.samsung.com> --- tools/testing/selftests/memory-hotplug/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/memory-hotplug/Makefile b/tools/testing/selftests/memory-hotplug/Makefile index 86636d207adf..183b46883875 100644 --- a/tools/testing/selftests/memory-hotplug/Makefile +++ b/tools/testing/selftests/memory-hotplug/Makefile @@ -4,7 +4,7 @@ all: include ../lib.mk TEST_PROGS := mem-on-off-test.sh -override RUN_TESTS := ./mem-on-off-test.sh -r 2 && echo "selftests: memory-hotplug [PASS]" || echo "selftests: memory-hotplug [FAIL]" +override RUN_TESTS := @./mem-on-off-test.sh -r 2 && echo "selftests: memory-hotplug [PASS]" || echo "selftests: memory-hotplug [FAIL]" override EMIT_TESTS := echo "$(RUN_TESTS)" run_full_test: -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
2
0 0

Re: [PATCH] selftests/bpf: Add bpf_probe_read_str to bpf_helpers.h

by Tushar Dave

On 02/28/2018 08:57 AM, Daniel Borkmann wrote: > Hi Tushar, > > On 02/28/2018 01:33 AM, Tushar Dave wrote: >> Using bpf_probe_read_str() from samples/bpf causes compiler warning. >> e.g. >> warning: implicit declaration of function 'bpf_probe_read_str' is invalid in C99 >> [-Wimplicit-function-declaration] >> num = bpf_probe_read_str(buf, sizeof(buf), ctx->di); >> ^ >> 1 warning generated. >> >> Add bpf_probe_read_str() to bpf_helpers.h so it can be used by >> samples/bpf programs. >> >> Signed-off-by: Tushar Dave <tushar.n.dave(a)oracle.com> > > In general no objections to it, but it would need an in-tree > user first: > > $ git grep -n bpf_probe_read_str tools/ > tools/include/uapi/linux/bpf.h:596: * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr) > $ > > Why not adding this along with a sample? Okay, I will send new patch along with new sample or add usage of bpf_probe_read_str() in one of our exiting sample :) Thanks. -Tushar PS: adding correct mail-list this time linux-kselftest(a)vger.kernel.org > > Thanks, > Daniel > -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

7 years, 3 months

2
1
0 0

[GIT PULL] kselftest fixes update for 4.16-rc4

by Shuah Khan

Hi Linus, Please pull the following Kselftest update for 4.16-rc4. This kselftest fixes update for 4.16-rc4 consists of of fixes for various problems in test output, compile errors, and missing configs. Diff for the update is attached. thanks, -- Shuah ----------------------------------------------------------------------------------- The following changes since commit 7928b2cbe55b2a410a0f5c1f154610059c57b1b2: Linux 4.16-rc1 (2018-02-11 15:04:29 -0800) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-4.16-rc4 for you to fetch changes up to f6869826de700bce59e2cef14974f99836e34e4f: selftests: vm: update .gitignore with new test (2018-02-26 16:09:50 -0700) ---------------------------------------------------------------- linux-kselftest-4.16-rc4 This kselftest fixes update for 4.16-rc4 consists of of fixes for various problems in test output, compile errors, and missing configs. ---------------------------------------------------------------- Anders Roxell (2): selftests: sync: missing CFLAGS while compiling selftests: memfd: add config fragment for fuse Daniel Díaz (2): selftests/android: Fix line continuation in Makefile selftests/futex: Fix line continuation in Makefile Dominik Brodowski (1): selftest/vDSO: fix O= Naresh Kamboju (1): selftests: pstore: Adding config fragment CONFIG_PSTORE_RAM=m Shuah Khan (2): selftests: memory-hotplug: silence test command echo selftests: vm: update .gitignore with new test tools/testing/selftests/android/Makefile | 8 ++++---- tools/testing/selftests/futex/Makefile | 6 +++--- tools/testing/selftests/memfd/config | 1 + tools/testing/selftests/memory-hotplug/Makefile | 2 +- tools/testing/selftests/pstore/config | 1 + tools/testing/selftests/sync/Makefile | 2 +- tools/testing/selftests/vDSO/Makefile | 14 +++++++------- tools/testing/selftests/vm/.gitignore | 1 + 8 files changed, 19 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/memfd/config -----------------------------------------------------------------------------------

7 years, 3 months

1
0
0 0

[PATCH net-next v2 00/14] selftests: forwarding: Add VRF-based tests

by Ido Schimmel

One of the nice things about network namespaces is that they allow one to easily create and test complex environments. Unfortunately, these namespaces can not be used with actual switching ASICs, as their ports can not be migrated to other network namespaces (NETIF_F_NETNS_LOCAL) and most of them probably do not support the L1-separation provided by namespaces. However, a similar kind of flexibility can be achieved by using VRFs and by looping the switch ports together. For example: br0 + vrf-h1 | vrf-h2 + +---+----+ + | | | | 192.0.2.1/24 + + + + 192.0.2.2/24 swp1 swp2 swp3 swp4 + + + + | | | | +--------+ +--------+ The VRFs act as lightweight namespaces representing hosts connected to the switch. This approach for testing switch ASICs has several advantages over the traditional method that requires multiple physical machines, to name a few: 1. Only the device under test (DUT) is being tested without noise from other system. 2. Ability to easily provision complex topologies. Testing bridging between 4-ports LAGs or 8-way ECMP requires many physical links that are not always available. With the VRF-based approach one merely needs to loopback more ports. These tests are written with switch ASICs in mind, but they can be run on any Linux box using veth pairs to emulate physical loopbacks. v2: * Order local variables declaration according to function arguments order (Petr) v1: * Change location to net/forwarding instead of forwarding/ * Add ability to pause on failure * Add ability to pause on cleanup * Make configuration file optional * Make ping/ping6/mz configurable * Add more tc tests Ido Schimmel (7): selftests: forwarding: Add initial testing framework selftests: forwarding: Add a test for FDB learning selftests: forwarding: Add a test for flooded traffic selftests: forwarding: Add a test for basic IPv4 and IPv6 routing selftests: forwarding: Create test topology for multipath routing selftests: forwarding: Test IPv4 weighted nexthops selftests: forwarding: Test IPv6 weighted nexthops Jiri Pirko (7): selftests: forwarding: Add tc offload check helper selftests: forwarding: Add MAC get helper selftests: forwarding: Allow to get netdev interfaces names from commandline selftests: forwarding: Introduce tc flower matching tests selftests: forwarding: Introduce tc actions tests selftests: forwarding: Introduce basic tc chains tests selftests: forwarding: Introduce basic shared blocks tests tools/testing/selftests/net/forwarding/.gitignore | 1 + tools/testing/selftests/net/forwarding/README | 56 +++ .../selftests/net/forwarding/bridge_vlan_aware.sh | 87 ++++ tools/testing/selftests/net/forwarding/config | 12 + .../net/forwarding/forwarding.config.sample | 31 ++ tools/testing/selftests/net/forwarding/lib.sh | 533 +++++++++++++++++++++ tools/testing/selftests/net/forwarding/router.sh | 125 +++++ .../selftests/net/forwarding/router_multipath.sh | 322 +++++++++++++ .../testing/selftests/net/forwarding/tc_actions.sh | 195 ++++++++ .../testing/selftests/net/forwarding/tc_chains.sh | 122 +++++ .../testing/selftests/net/forwarding/tc_common.sh | 23 + .../testing/selftests/net/forwarding/tc_flower.sh | 196 ++++++++ .../selftests/net/forwarding/tc_shblocks.sh | 122 +++++ 13 files changed, 1825 insertions(+) create mode 100644 tools/testing/selftests/net/forwarding/.gitignore create mode 100644 tools/testing/selftests/net/forwarding/README create mode 100755 tools/testing/selftests/net/forwarding/bridge_vlan_aware.sh create mode 100644 tools/testing/selftests/net/forwarding/config create mode 100644 tools/testing/selftests/net/forwarding/forwarding.config.sample create mode 100644 tools/testing/selftests/net/forwarding/lib.sh create mode 100755 tools/testing/selftests/net/forwarding/router.sh create mode 100755 tools/testing/selftests/net/forwarding/router_multipath.sh create mode 100755 tools/testing/selftests/net/forwarding/tc_actions.sh create mode 100755 tools/testing/selftests/net/forwarding/tc_chains.sh create mode 100644 tools/testing/selftests/net/forwarding/tc_common.sh create mode 100755 tools/testing/selftests/net/forwarding/tc_flower.sh create mode 100755 tools/testing/selftests/net/forwarding/tc_shblocks.sh -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

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