linux-kernel - [PATCH] perf vendor events: fix processing for xfs

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Date:   Thu, 15 Mar 2018 01:10:52 +0800
From:   John Garry <john.garry@...wei.com>
To:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <alexander.shishkin@...ux.intel.com>, <jolsa@...hat.com>,
        <namhyung@...nel.org>, <ak@...ux.intel.com>, <wcohen@...hat.com>,
        <sukadev@...ux.vnet.ibm.com>
CC:     <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH] perf vendor events: fix processing for xfs

In the recently introduced support for vendor subdirectory,
the checking for directory entries under xfs (or any other fs
which does not support dirent.d_type) is missing the check
for links for current and parent directory. This can result
in a broken pmu_events.c being generated.

Fix this by adding the appropriate check in is_leaf_dir().

Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Signed-off-by: John Garry <john.garry@...wei.com>

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 1c01844..db3a594 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -873,7 +873,10 @@ static int is_leaf_dir(const char *fpath)
 		return 0;
 
 	while ((dir = readdir(d)) != NULL) {
-		if (dir->d_type == DT_DIR && dir->d_name[0] != '.') {
+		if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
+			continue;
+
+		if (dir->d_type == DT_DIR) {
 			res = 0;
 			break;
 		} else if (dir->d_type == DT_UNKNOWN) {
-- 
1.9.1