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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-17 14:42:39 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-17 14:50:38 -0300 |
| commit | 7014e0e3bf9b0d0b6221eb7d2f8a1f690423dd73 (patch) | |
| tree | 37da2c3997d4b2c03a4e1698481e8608925b11cd /tools/lib | |
| parent | 25a7d914274de38637c5199342eb90a297361386 (diff) | |
| download | linux-7014e0e3bf9b0d0b6221eb7d2f8a1f690423dd73.tar.bz2 | |
tools lib api fs tracing_path: Introduce opendir() method
That takes care of using the right call to get the tracing_path
directory, the one that will end up calling tracing_path_set() to figure
out where tracefs is mounted.
One more step in doing just lazy reading of system structures to reduce
the number of operations done unconditionaly at 'perf' start.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-42zzi0f274909bg9mxzl81bu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/api/fs/tracing_path.c | 13 | ||||
| -rw-r--r-- | tools/lib/api/fs/tracing_path.h | 3 |
2 files changed, 16 insertions, 0 deletions
diff --git a/tools/lib/api/fs/tracing_path.c b/tools/lib/api/fs/tracing_path.c index 9cd282425929..9b451af0721c 100644 --- a/tools/lib/api/fs/tracing_path.c +++ b/tools/lib/api/fs/tracing_path.c @@ -101,6 +101,19 @@ void put_events_file(char *file) free(file); } +DIR *tracing_events__opendir(void) +{ + DIR *dir = NULL; + char *path = get_tracing_file("events"); + + if (path) { + dir = opendir(path); + put_events_file(path); + } + + return dir; +} + int tracing_path__strerror_open_tp(int err, char *buf, size_t size, const char *sys, const char *name) { diff --git a/tools/lib/api/fs/tracing_path.h b/tools/lib/api/fs/tracing_path.h index 3b32fb439f12..904d085b2ae7 100644 --- a/tools/lib/api/fs/tracing_path.h +++ b/tools/lib/api/fs/tracing_path.h @@ -3,9 +3,12 @@ #define __API_FS_TRACING_PATH_H #include <linux/types.h> +#include <dirent.h> extern char tracing_events_path[]; +DIR *tracing_events__opendir(void); + void tracing_path_set(const char *mountpoint); const char *tracing_path_mount(void); |