netdev - [PATCH bpf-next 06/10] libbpf: Change signature of bpf_prog

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Date:   Wed,  5 Oct 2022 01:11:39 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     bpf@...r.kernel.org
Cc:     razor@...ckwall.org, ast@...nel.org, andrii@...nel.org,
        martin.lau@...ux.dev, john.fastabend@...il.com,
        joannelkoong@...il.com, memxor@...il.com, toke@...hat.com,
        joe@...ium.io, netdev@...r.kernel.org,
        Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH bpf-next 06/10] libbpf: Change signature of bpf_prog_query

Minor signature change for bpf_prog_query() API, no change in behavior.
An alternative option would be to add a new libbpf introspection API
with close to 1:1 implementation of bpf_prog_query() but with changed
prog_ids pointer. Given the change is just minor enough, we went for
the first option here.

Co-developed-by: Nikolay Aleksandrov <razor@...ckwall.org>
Signed-off-by: Nikolay Aleksandrov <razor@...ckwall.org>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
---
 tools/lib/bpf/bpf.c | 2 +-
 tools/lib/bpf/bpf.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1d49a0352836..18b1e91cc469 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -846,7 +846,7 @@ int bpf_prog_query_opts(int target_fd,
 }
 
 int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
-		   __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt)
+		   __u32 *attach_flags, void *prog_ids, __u32 *prog_cnt)
 {
 	LIBBPF_OPTS(bpf_prog_query_opts, opts);
 	int ret;
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 9c50beabdd14..bef7a5282188 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -386,7 +386,7 @@ LIBBPF_API int bpf_prog_query_opts(int target_fd,
 				   struct bpf_prog_query_opts *opts);
 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
 			      __u32 query_flags, __u32 *attach_flags,
-			      __u32 *prog_ids, __u32 *prog_cnt);
+			      void *prog_ids, __u32 *prog_cnt);
 
 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
-- 
2.34.1