[LTP] [PATCH] refluxfs: Check kernel reflink support before mount

On some systems, mkfs.xfs can format XFS partition with reflink support
but the kernel then cannot mount it. Check for kernel reflink support
in setup() before mount.

Signed-off-by: Martin Doucha <[email protected]>
---
 testcases/cve/refluxfs.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/testcases/cve/refluxfs.c b/testcases/cve/refluxfs.c
index e41f35c53..277d56bb7 100644
--- a/testcases/cve/refluxfs.c
+++ b/testcases/cve/refluxfs.c
@@ -38,6 +38,7 @@
  */
 
 #include <pwd.h>
+#include <sys/mount.h>
 
 #include "tst_test.h"
 #include "tst_safe_prw.h"
@@ -94,6 +95,15 @@ static void setup(void)
 	int probe_fd, probe_dio_fd;
 	struct stat sb;
 
+	SAFE_MKDIR(MNTPOINT, 0755);
+	TEST(mount(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL));
+
+	if (TST_RET == -1 && TST_ERR == EOPNOTSUPP)
+		tst_brk(TCONF, "Kernel does not support XFS reflinks");
+
+	if (TST_RET)
+		tst_brk(TBROK | TTERRNO, "Mount failed");
+
 	SAFE_STAT(MNTPOINT, &sb);
 	blksize = sb.st_blksize;
 
@@ -197,6 +207,11 @@ static void cleanup(void)
 	free(tbuf);
 	free(wbuf);
 	free(rbuf);
+
+	SAFE_SETEUID(0);
+
+	if (tst_is_mounted(MNTPOINT))
+		SAFE_UMOUNT(MNTPOINT);
 }
 
 static struct tst_test test = {
@@ -205,8 +220,7 @@ static struct tst_test test = {
 	.cleanup = cleanup,
 	.runtime = 180,
 	.needs_root = 1,
-	.mount_device = 1,
-	.mntpoint = MNTPOINT,
+	.format_device = 1,
 	.filesystems = (struct tst_fs []) {
 		{
 			.type = "xfs",
-- 
2.54.0


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