diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2026-06-06 15:39:35 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-06-07 20:03:01 +0300 |
| commit | d14e6b4346bf397eca7cb5f4b7b0b8054be632d8 (patch) | |
| tree | d545fcaa1bf11283dffb30c3398690f9e8009515 /include | |
| parent | 880db5d4abb29e931d82b9feefb4382f76fcf9e5 (diff) | |
| download | linux-d14e6b4346bf397eca7cb5f4b7b0b8054be632d8.tar.xz | |
bpf: Add multi tracing attach types
Adding new program attach types multi tracing attachment:
BPF_TRACE_FENTRY_MULTI
BPF_TRACE_FEXIT_MULTI
and their base support in verifier code.
Programs with such attach type will use specific link attachment
interface coming in following changes.
This was suggested by Andrii some (long) time ago and turned out
to be easier than having special program flag for that.
Bpf programs with such types have 'bpf_multi_func' function set as
their attach_btf_id and keep module reference when it's specified
by attach_prog_fd.
They are also accepted as sleepable programs during verification,
and the real validation for specific BTF_IDs/functions will happen
during the multi link attachment in following changes.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260606123955.345967-11-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bpf.h | 5 | ||||
| -rw-r--r-- | include/linux/btf_ids.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/bpf.h | 2 |
3 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 428789a9e736..b52dc64ec92d 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2113,6 +2113,11 @@ static inline void bpf_prog_put_recursion_context(struct bpf_prog *prog) #endif } +static inline bool is_tracing_multi(enum bpf_attach_type type) +{ + return type == BPF_TRACE_FENTRY_MULTI || type == BPF_TRACE_FEXIT_MULTI; +} + #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) /* This macro helps developer to register a struct_ops type and generate * type information correctly. Developers should use this macro to register diff --git a/include/linux/btf_ids.h b/include/linux/btf_ids.h index af011db39ab3..8b5a9ee92513 100644 --- a/include/linux/btf_ids.h +++ b/include/linux/btf_ids.h @@ -284,5 +284,6 @@ extern u32 bpf_cgroup_btf_id[]; extern u32 bpf_local_storage_map_btf_id[]; extern u32 btf_bpf_map_id[]; extern u32 bpf_kmem_cache_btf_id[]; +extern u32 bpf_multi_func_btf_id[]; #endif diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index d5238df5e5eb..28d127e5040a 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -1156,6 +1156,8 @@ enum bpf_attach_type { BPF_TRACE_KPROBE_SESSION, BPF_TRACE_UPROBE_SESSION, BPF_TRACE_FSESSION, + BPF_TRACE_FENTRY_MULTI, + BPF_TRACE_FEXIT_MULTI, __MAX_BPF_ATTACH_TYPE }; |