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| author | Puranjay Mohan <puranjay@kernel.org> | 2024-10-16 10:41:35 +0200 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-10-22 00:02:49 +0200 |
| commit | 6280cf718db0c557b5fe44e2d2e8ad8e832696a7 (patch) | |
| tree | 7622100363c4b50f66ed40ff4606e61ab46db016 /kernel/bpf/helpers.c | |
| parent | Merge branch 'bpf-fix-tailcall-infinite-loop-caused-by-freplace' (diff) | |
| download | linux-6280cf718db0c557b5fe44e2d2e8ad8e832696a7.tar.xz linux-6280cf718db0c557b5fe44e2d2e8ad8e832696a7.zip | |
bpf: Implement bpf_send_signal_task() kfunc
Implement bpf_send_signal_task kfunc that is similar to
bpf_send_signal_thread and bpf_send_signal helpers but can be used to
send signals to other threads and processes. It also supports sending a
cookie with the signal similar to sigqueue().
If the receiving process establishes a handler for the signal using the
SA_SIGINFO flag to sigaction(), then it can obtain this cookie via the
si_value field of the siginfo_t structure passed as the second argument
to the handler.
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241016084136.10305-2-puranjay@kernel.org
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 073e6f04f4d7..5c3fdb29c1b1 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -3055,6 +3055,7 @@ BTF_ID_FLAGS(func, bpf_task_get_cgroup1, KF_ACQUIRE | KF_RCU | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_task_from_pid, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_task_from_vpid, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_throw) +BTF_ID_FLAGS(func, bpf_send_signal_task, KF_TRUSTED_ARGS) BTF_KFUNCS_END(generic_btf_ids) static const struct btf_kfunc_id_set generic_kfunc_set = { |