From: Jan Kara <jack@suse.cz> maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8MPXP Reference: https://lore.kernel.org/all/20231101174325.10596-7-jack@suse.cz/ ------------------------------------------- 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> Conflicts: fs/ext4/super.c commit 218de67764e5 ("ext4: simplify device handling") in linux-next removed use of s_umount Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com> --- 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 dd620c34f51c..df0ed022c53d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5858,8 +5858,9 @@ static struct bdev_handle *ext4_get_journal_blkdev(struct super_block *sb, /* see get_tree_bdev why this is needed and safe */ up_write(&sb->s_umount); - 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); down_write(&sb->s_umount); if (IS_ERR(bdev_handle)) { ext4_msg(sb, KERN_ERR, -- 2.31.1