perf jevents: Add support for an extra directory level

Currently only upto a level 2 directory is supported, in form
vendor/platform.

Add support for a further level, to support vendor/platform
sub-directories in future, which will be vendor/platform/cpu and
vendor/platform/sys.

Signed-off-by: John Garry <[email protected]>
Acked-by: Kajol Jain <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Joakim Zhang <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Kim Phillips <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Shaokun Zhang <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 8 insertions, 3 deletions

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 72cfa3b5046d..9022216b1253 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -978,15 +978,20 @@ static int process_one_file(const char *fpath, const struct stat *sb,
 	int level   = ftwbuf->level;
 	int err = 0;
 
-	if (level == 2 && is_dir) {
+	if (level >= 2 && is_dir) {
+		int count = 0;
 		/*
 		 * For level 2 directory, bname will include parent name,
 		 * like vendor/platform. So search back from platform dir
 		 * to find this.
+		 * Something similar for level 3 directory, but we're a PMU
+		 * category folder, like vendor/platform/cpu.
 		 */
 		bname = (char *) fpath + ftwbuf->base - 2;
 		for (;;) {
 			if (*bname == '/')
+				count++;
+			if (count == level - 1)
 				break;
 			bname--;
 		}
@@ -999,13 +1004,13 @@ static int process_one_file(const char *fpath, const struct stat *sb,
 		 level, sb->st_size, bname, fpath);
 
 	/* base dir or too deep */
-	if (level == 0 || level > 3)
+	if (level == 0 || level > 4)
 		return 0;
 
 
 	/* model directory, reset topic */
 	if ((level == 1 && is_dir && is_leaf_dir(fpath)) ||
-	    (level == 2 && is_dir)) {
+	    (level >= 2 && is_dir && is_leaf_dir(fpath))) {
 		if (close_table)
 			print_events_table_suffix(eventsfp);