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ext4: open via dedicated fs bdev helpers

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Route the external journal device open through fs_bdev_file_open_by_dev()
so it is registered against the superblock, and convert the matching
releases to fs_bdev_file_release().

Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20260616-work-super-bdev_holder_global-v2-11-7df6b864028e@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2026-06-16 16:08:27 +02:00
parent 6585c5888d
commit 86b5384943
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 6 additions and 6 deletions
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12
fs/ext4/super.c
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@ -5797,7 +5797,7 @@ failed_mount8: __maybe_unused
brelse(sbi->s_sbh);
if (sbi->s_journal_bdev_file) {
invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));
bdev_fput(sbi->s_journal_bdev_file);
fs_bdev_file_release(sbi->s_journal_bdev_file, sb);
}
out_fail:
invalidate_bdev(sb->s_bdev);
@ -5981,9 +5981,9 @@ static struct file *ext4_get_journal_blkdev(struct super_block *sb,
struct ext4_super_block *es;
int errno;
bdev_file = bdev_file_open_by_dev(j_dev,
bdev_file = fs_bdev_file_open_by_dev(j_dev,
BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES,
sb, &fs_holder_ops);
sb, sb);
if (IS_ERR(bdev_file)) {
ext4_msg(sb, KERN_ERR,
"failed to open journal device unknown-block(%u,%u) %pe",
@ -6043,7 +6043,7 @@ static struct file *ext4_get_journal_blkdev(struct super_block *sb,
out_bh:
brelse(bh);
out_bdev:
bdev_fput(bdev_file);
fs_bdev_file_release(bdev_file, sb);
return ERR_PTR(errno);
}
@ -6082,7 +6082,7 @@ static journal_t *ext4_open_dev_journal(struct super_block *sb,
out_journal:
ext4_journal_destroy(EXT4_SB(sb), journal);
out_bdev:
bdev_fput(bdev_file);
fs_bdev_file_release(bdev_file, sb);
return ERR_PTR(errno);
}
@ -7499,7 +7499,7 @@ static void ext4_kill_sb(struct super_block *sb)
kill_block_super(sb);
if (bdev_file)
bdev_fput(bdev_file);
fs_bdev_file_release(bdev_file, sb);
}
static struct file_system_type ext4_fs_type = {