[tip:perf/core] perf bpf examples: Convert etcsnoop to use bpf_map()

tip-bot for Arnaldo Carvalho de Melo
2019-01-26T10:13:01Z

Commit-ID: f52fdd64f6046ab121688155aebd66b52ce0077d
Gitweb: https://git.kernel.org/tip/f52fdd64f6046ab121688155aebd66b52ce0077d
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Thu, 24 Jan 2019 15:48:05 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 25 Jan 2019 15:12:11 +0100

perf bpf examples: Convert etcsnoop to use bpf_map()

Making the code more compact, end result is the same:

# trace -e /home/acme/git/perf/tools/perf/examples/bpf/etcsnoop.c
0.000 ( ): sed/7385 openat(dfd: CWD, filename: "/etc/ld.so.cache", flags: RDONLY|CLOEXEC) ...
2727.723 ( ): cat/7389 openat(dfd: CWD, filename: "/etc/ld.so.cache", flags: RDONLY|CLOEXEC) ...
2728.543 ( ): cat/7389 openat(dfd: CWD, filename: "/etc/passwd") ...
^C

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-znhgz24p0daux2kay200ovc1@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/examples/bpf/etcsnoop.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/tools/perf/examples/bpf/etcsnoop.c b/tools/perf/examples/bpf/etcsnoop.c
index 550e69c2e8d1..e81b535346c0 100644
--- a/tools/perf/examples/bpf/etcsnoop.c
+++ b/tools/perf/examples/bpf/etcsnoop.c
@@ -21,12 +21,8 @@

#include <stdio.h>

-struct bpf_map SEC("maps") __augmented_syscalls__ = {
- .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
- .key_size = sizeof(int),
- .value_size = sizeof(u32),
- .max_entries = __NR_CPUS__,
-};
+/* bpf-output associated map */
+bpf_map(__augmented_syscalls__, PERF_EVENT_ARRAY, int, u32, __NR_CPUS__);

struct augmented_filename {
int size;