btrfs-progs: btrfsck operations should be exclusive

this patch will make btrfsck operations to open disk in exclusive mode,
so that mount will fail when btrfsck is running

Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/volumes.c b/volumes.c
index 65be5f07..8c458517 100644
--- a/volumes.c
+++ b/volumes.c
@@ -214,7 +214,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags)
 		if (device->devid == fs_devices->lowest_devid)
 			fs_devices->lowest_bdev = fd;
 		device->fd = fd;
-		if (flags == O_RDWR)
+		if (flags & O_RDWR)
 			device->writeable = 1;
 	}
 	return 0;