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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-06-02 10:51:59 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-06-06 18:18:30 -0300 |
| commit | b4cbfa5670414a567a8a3b368047538f522eff6a (patch) | |
| tree | f76a09d058aefe3c5c7ebbf1c1560e5813d1b474 /tools/lib | |
| parent | 7db91f251056f90fec4121f028680ab3153a0f3c (diff) | |
| download | linux-b4cbfa5670414a567a8a3b368047538f522eff6a.tar.bz2 | |
tools lib bpf: Use IS_ERR() reporting macros with bpf_map__get_private()
To try to, over time, consistently use the IS_ERR() interface instead of
using two return values, i.e. the integer return value for an error and
the pointer address to return the bpf_map->priv pointer.
Also rename it to bpf__priv(), to leave the "get" term for reference
counting.
Noticed while working on using BPF for collecting non-integer syscall
argument payloads (struct sockaddr in calls such as connect(), for
instance), where we need to use BPF maps and thus generalise
bpf__setup_stdout() to connect bpf_output events with maps in a bpf
proggie.
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/tip-saypxyd6ptrct379jqgxx4bl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 9 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 2 |
2 files changed, 3 insertions, 8 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 7e543c3102d4..9bba1a907abe 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1351,14 +1351,9 @@ int bpf_map__set_private(struct bpf_map *map, void *priv, return 0; } -int bpf_map__get_private(struct bpf_map *map, void **ppriv) +void *bpf_map__priv(struct bpf_map *map) { - if (!map) - return -EINVAL; - - if (ppriv) - *ppriv = map->priv; - return 0; + return map ? map->priv : ERR_PTR(-EINVAL); } struct bpf_map * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index a51594c7b518..916abf971249 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -187,6 +187,6 @@ const char *bpf_map__get_name(struct bpf_map *map); typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *); int bpf_map__set_private(struct bpf_map *map, void *priv, bpf_map_clear_priv_t clear_priv); -int bpf_map__get_private(struct bpf_map *map, void **ppriv); +void *bpf_map__priv(struct bpf_map *map); #endif |