On 8/9/23 1:34 AM, Jiri Olsa wrote:
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@xxxxxxxxxx>
Acked-by: Yafang Shao <laoar.shao@xxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Ack with a minor nit below.
Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>
---
include/uapi/linux/bpf.h | 1 +
kernel/bpf/syscall.c | 2 +-
kernel/trace/bpf_trace.c | 45 +++++++++++++++++++++++++++++++---
tools/include/uapi/linux/bpf.h | 1 +
4 files changed, 44 insertions(+), 5 deletions(-)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index e48780951fc7..d7f4f50b1e58 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -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;
The 'cookies' field is inserted into the middle of 'uprobe_multi'
struct. Not sure whether this may cause bug bisecting issue or not.
