From: Josef Bacik <josef@toxicpanda.com>
Date: Tue, 7 Jan 2020 16:55:41 +0000 (-0500)
Subject: ltp/fsx: drop caches if we're doing closeopen
X-Git-Tag: v2022.05.01~892
X-Git-Url: http://git.apps.os.sepia.ceph.com/?p=xfstests-dev.git;a=commitdiff_plain;h=fb72f6f547d7f2ecb97f33858193e58119bb5a4d

ltp/fsx: drop caches if we're doing closeopen

fsx has a closeopen option where it will close and then re-open the
file.  This is handy, but what is really more useful is to drop the file
from cache completely, so add a drop_caches into this operation so that
the file is read back completely from disk to be really evil.

[Eryu: fix drop cache failure number to stay within 190]

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
---

diff --git a/ltp/fsx.c b/ltp/fsx.c
index c74b13c2..120f4374 100644
--- a/ltp/fsx.c
+++ b/ltp/fsx.c
@@ -1778,10 +1778,14 @@ docloseopen(void)
 		prterr("docloseopen: close");
 		report_failure(180);
 	}
+	if (system("echo 3 > /proc/sys/vm/drop_caches")) {
+		prterr("docloseopen: drop_caches");
+		report_failure(181);
+	}
 	fd = open(fname, O_RDWR|o_direct, 0);
 	if (fd < 0) {
 		prterr("docloseopen: open");
-		report_failure(181);
+		report_failure(182);
 	}
 }