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Code Issues Releases Wiki Activity

ext4: Block writes to journal device

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Ask block layer to not allow other writers to open block device used
for ext4 journal.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20231101174325.10596-7-jack@suse.cz
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jan Kara 2023-11-01 18:43:12 +01:00 committed by Christian Brauner
parent 3584c8f48a
commit afde134b5b
No known key found for this signature in database
GPG key ID: 91C61BC06578DCA2
1 changed files with 3 additions and 2 deletions
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5
fs/ext4/super.c
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@ -5864,8 +5864,9 @@ 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",