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Subject[PATCH 07/18] tools headers: Fixup tools/include/uapi/linux/bpf.h copy of kernel ABI header
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

In 04df41e343db ("bpf: update tools/include/uapi/linux/bpf.h") the files
added in 40304b2a1567 ("bpf: BPF support for sock_ops") were added to
tools/include, but not in a verbatim way, missing the comments, which
ends up triggering this warning when build tools/perf/:

make: Entering directory '/home/acme/git/linux/tools/perf'
BUILD: Doing 'make -j4' parallel build
Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'

Make sure the the lines are equal, to fix the simple header copy
drift detector in tools/perf/.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Lawrence Brakmo <brakmo@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 04df41e343db ("bpf: update tools/include/uapi/linux/bpf.h")
Link: http://lkml.kernel.org/n/tip-z9qyyqht9qq3yyxu76sfy0dh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/include/uapi/linux/bpf.h | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 8ff155ffcd84..e99e3e6f8b37 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -750,6 +750,8 @@ struct bpf_map_info {

/* User bpf_sock_ops struct to access socket values and specify request ops
* and their replies.
+ * Some of this fields are in network (bigendian) byte order and may need
+ * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
* New fields can only be added at the end of this structure
*/
struct bpf_sock_ops {
@@ -759,12 +761,12 @@ struct bpf_sock_ops {
__u32 replylong[4];
};
__u32 family;
- __u32 remote_ip4;
- __u32 local_ip4;
- __u32 remote_ip6[4];
- __u32 local_ip6[4];
- __u32 remote_port;
- __u32 local_port;
+ __u32 remote_ip4; /* Stored in network byte order */
+ __u32 local_ip4; /* Stored in network byte order */
+ __u32 remote_ip6[4]; /* Stored in network byte order */
+ __u32 local_ip6[4]; /* Stored in network byte order */
+ __u32 remote_port; /* Stored in network byte order */
+ __u32 local_port; /* stored in host byte order */
};

/* List of known BPF sock_ops operators.
--
2.9.4
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