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| author | Mykyta Yatsenko <yatsenko@meta.com> | 2026-08-08 15:42:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-08-19 19:20:12 +0300 |
| commit | 7fd0235c438cd740baef214770cdcd808acce49b (patch) | |
| tree | 664762251087c5e514c7a7da11cc776a9acb7d85 /tools | |
| parent | 070d4ce6776f67e1a0adb43983fa33e8fe4f181b (diff) | |
| download | linux-7fd0235c438cd740baef214770cdcd808acce49b.tar.xz | |
selftests/bpf: Add tests for sleepable tracepoint programs
[ Upstream commit 8a20655749c625dcc4debdfdeeaa0cf8bb85c203 ]
Cover all three sleepable tracepoint types (tp_btf.s, raw_tp.s, tp.s)
and sys_exit (via bpf_task_pt_regs) with functional tests using
bpf_copy_from_user() on getcwd. Verify alias and bare SEC variants,
bpf_prog_test_run_raw_tp() with BPF_F_TEST_RUN_ON_CPU rejection,
attach-time rejection on non-faultable tracepoints, and load-time
rejection for sleepable tp_btf on non-faultable tracepoints.
[ rbm: Removed hunks from (new) files:
tools/testing/selftests/bpf/prog_tests/sleepable_tracepoints.c
tools/testing/selftests/bpf/progs/test_sleepable_tracepoints.c
tools/testing/selftests/bpf/progs/test_sleepable_tracepoints_fail.c
These rely on libbpf's ".s" tracepoint section handlers
(0cd420a6f40c7) and on kernel-side sleepable tracepoint runtime
support (439ebd5b5708, 12628ffaf98b, 57918341dd19), none of which
are backported here; kept only the verifier/sleepable.c hunk, which
is correct and needed on its own. ]
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/bpf/20260422-sleepable_tracepoints-v13-6-99005dff21ef@meta.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Ricardo B. Marlière (SUSE) <ricardo@marliere.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/verifier/sleepable.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/tools/testing/selftests/bpf/verifier/sleepable.c b/tools/testing/selftests/bpf/verifier/sleepable.c index c2b7f5ebf168..6dabc5522945 100644 --- a/tools/testing/selftests/bpf/verifier/sleepable.c +++ b/tools/testing/selftests/bpf/verifier/sleepable.c @@ -76,7 +76,20 @@ .runs = -1, }, { - "sleepable raw tracepoint reject", + "sleepable raw tracepoint accept", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACING, + .expected_attach_type = BPF_TRACE_RAW_TP, + .kfunc = "sys_enter", + .result = ACCEPT, + .flags = BPF_F_SLEEPABLE, + .runs = -1, +}, +{ + "sleepable raw tracepoint reject non-faultable", .insns = { BPF_MOV64_IMM(BPF_REG_0, 0), BPF_EXIT_INSN(), @@ -85,7 +98,7 @@ .expected_attach_type = BPF_TRACE_RAW_TP, .kfunc = "sched_switch", .result = REJECT, - .errstr = "Only fentry/fexit/fsession/fmod_ret, lsm, iter, uprobe, and struct_ops programs can be sleepable", + .errstr = "Sleepable program cannot attach to non-faultable tracepoint", .flags = BPF_F_SLEEPABLE, .runs = -1, }, |