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bpf: Add cookies support for uprobe_multi link

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Adding support to specify cookies array for uprobe_multi link.

The cookies array share indexes and length with other uprobe_multi
arrays (offsets/ref_ctr_offsets).

The cookies[i] value defines cookie for i-the uprobe and will be
returned by bpf_get_attach_cookie helper when called from ebpf
program hooked to that specific uprobe.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230809083440.3209381-5-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa
2023-08-09 10:34:16 +02:00
committed by Alexei Starovoitov
parent 89ae89f53d
commit 0b779b61f6
4 changed files with 44 additions and 5 deletions
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tools/include/uapi/linux/bpf.h
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@@ -1639,6 +1639,7 @@ union bpf_attr {
__aligned_u64 path;
__aligned_u64 offsets;
__aligned_u64 ref_ctr_offsets;
__aligned_u64 cookies;
__u32 cnt;
__u32 flags;
} uprobe_multi;