Messages in this thread Patch in this message | | | From | James Clark <> | Subject | [PATCH v4 4/8] perf pmu: Add function to check if a pmu file exists | Date | Thu, 19 Jan 2023 15:43:03 +0000 |
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From: German Gomez <german.gomez@arm.com>
Add a utility function perf_pmu__file_exists() to check if a given pmu file exists in the sysfs filesystem.
Signed-off-by: German Gomez <german.gomez@arm.com> Signed-off-by: James Clark <james.clark@arm.com> --- tools/perf/util/pmu.c | 10 ++++++++++ tools/perf/util/pmu.h | 2 ++ 2 files changed, 12 insertions(+)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 7a4e243a370d..3529556d57dc 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1741,6 +1741,16 @@ int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, return ret; } +bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name) +{ + char path[PATH_MAX]; + + if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name)) + return false; + + return file_available(path); +} + static int perf_pmu__new_caps(struct list_head *list, char *name, char *value) { struct perf_pmu_caps *caps = zalloc(sizeof(*caps)); diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 3ef99f096852..db51fa82a9a7 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -230,6 +230,8 @@ bool pmu_have_event(const char *pname, const char *name); int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) __scanf(3, 4); +bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name); + int perf_pmu__test(void); struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu); -- 2.25.1
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