From: Jan Kara Date: Wed, 1 Nov 2023 17:43:12 +0000 (+0100) Subject: ext4: Block writes to journal device X-Git-Tag: v6.8-rc1~214^2~3 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=afde134b5bd02a5c719336ca1d0d3cb7e4def70e;p=thirdparty%2Flinux.git ext4: Block writes to journal device Ask block layer to not allow other writers to open block device used for ext4 journal. Signed-off-by: Jan Kara Link: https://lore.kernel.org/r/20231101174325.10596-7-jack@suse.cz Reviewed-by: Jens Axboe Signed-off-by: Christian Brauner --- diff --git a/fs/ext4/super.c b/fs/ext4/super.c index bd752f3f1dd52..0980845c8b8f1 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -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",