Ask block layer to not allow other writers to open block device used
for ext4 journal.
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/ext4/super.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 439e37ac219b..f96398f8aac9 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5855,8 +5855,9 @@ static struct bdev_handle *ext4_get_journal_blkdev(struct super_block *sb,
struct ext4_super_block *es;
int errno;
- bdev_handle = bdev_open_by_dev(j_dev, BLK_OPEN_READ | BLK_OPEN_WRITE,
- sb, &fs_holder_ops);
+ bdev_handle = bdev_open_by_dev(j_dev,
+ BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES,
+ sb, &fs_holder_ops);
if (IS_ERR(bdev_handle)) {
ext4_msg(sb, KERN_ERR,
"failed to open journal device unknown-block(%u,%u) %ld",
--
2.35.3
