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| author | Emil Tsalapatis <emil@etsalapatis.com> | 2026-02-03 21:04:24 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-02-03 21:41:16 +0300 |
| commit | 4d99137eea48b18387d8d17443e28d124177ab7b (patch) | |
| tree | e779f0f28060e84fcea857eadda068a880f38b0e /tools/testing | |
| parent | 9ddfa24e16747da8d98464b4285ee66e37ddc5c0 (diff) | |
| download | linux-4d99137eea48b18387d8d17443e28d124177ab7b.tar.xz | |
selftests/bpf: Add selftests for stream functions under lock
Add a selftest to ensure BPF stream functions can now be called
while holding a lock.
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260203180424.14057-5-emil@etsalapatis.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/stream.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/stream.c b/tools/testing/selftests/bpf/progs/stream.c index f63b378de090..6f999ba951a3 100644 --- a/tools/testing/selftests/bpf/progs/stream.c +++ b/tools/testing/selftests/bpf/progs/stream.c @@ -42,6 +42,10 @@ int size; u64 fault_addr; void *arena_ptr; +#define private(name) SEC(".bss." #name) __hidden __attribute__((aligned(8))) + +private(STREAM) struct bpf_spin_lock block; + SEC("syscall") __success __retval(0) int stream_exhaust(void *ctx) @@ -255,4 +259,32 @@ int stream_print_stack_invalid_id(void *ctx) return bpf_stream_print_stack((enum bpf_stream_id)0xbadcafe); } +SEC("syscall") +__arch_x86_64 +__arch_arm64 +__success __retval(0) +__stdout(_STR) +__stderr("CPU: {{[0-9]+}} UID: 0 PID: {{[0-9]+}} Comm: {{.*}}") +__stderr("Call trace:\n" +"{{([a-zA-Z_][a-zA-Z0-9_]*\\+0x[0-9a-fA-F]+/0x[0-9a-fA-F]+\n" +"|[ \t]+[^\n]+\n)*}}") +int stream_print_kfuncs_locked(void *ctx) +{ + int ret; + + bpf_spin_lock(&block); + + ret = bpf_stream_printk(BPF_STDOUT, _STR); + if (ret) + goto out; + + ret = bpf_stream_print_stack(BPF_STDERR); + +out: + bpf_spin_unlock(&block); + + return ret; +} + + char _license[] SEC("license") = "GPL"; |