diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2022-03-16 13:24:12 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-03-17 20:17:19 -0700 |
| commit | ca74823c6e16dd42b7cf60d9fdde80e2a81a67bb (patch) | |
| tree | f0c233f5e8a14a92d9b19f348a7fc83c98817b61 /kernel/bpf | |
| parent | 97ee4d20ee67eb462581a7af01442de6586e390b (diff) | |
bpf: Add cookie support to programs attached with kprobe multi link
Adding support to call bpf_get_attach_cookie helper from
kprobe programs attached with kprobe multi link.
The cookie is provided by array of u64 values, where each
value is paired with provided function address or symbol
with the same array index.
When cookie array is provided it's sorted together with
addresses (check bpf_kprobe_multi_cookie_swap). This way
we can find cookie based on the address in
bpf_get_attach_cookie helper.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220316122419.933957-7-jolsa@kernel.org
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index b8bb67ee6c57..cdaa1152436a 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -4261,7 +4261,7 @@ static int tracing_bpf_link_attach(const union bpf_attr *attr, bpfptr_t uattr, return -EINVAL; } -#define BPF_LINK_CREATE_LAST_FIELD link_create.kprobe_multi.addrs +#define BPF_LINK_CREATE_LAST_FIELD link_create.kprobe_multi.cookies static int link_create(union bpf_attr *attr, bpfptr_t uattr) { enum bpf_prog_type ptype; |