From: German Gomez <[email protected]>
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 <[email protected]>
Signed-off-by: James Clark <[email protected]>
---
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 23e1d70fa343..8abf5b8439a7 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1742,6 +1742,16 @@ 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 742d4db319a0..2bdc560f19c7 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