diff mbox series

[7/7] ext4: Block writes to journal device

Message ID 20231101174325.10596-7-jack@suse.cz (mailing list archive)
State Deferred, archived
Headers show
Series block: Add config option to not allow writing to mounted devices | expand

Commit Message

Jan Kara Nov. 1, 2023, 5:43 p.m. UTC 
Ask block layer to not allow other writers to open block device used
for ext4 journal.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/ext4/super.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

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",