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f2fs: should fail mount when trying to recover data on read-only dev

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If device is read-only, we should not proceed data recovery.
But, if the previous checkpoint was done by normal clean shutdown, it's safe to
proceed the recovery, since there will be no data to be recovered.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-01-23 19:16:59 -08:00
parent 119ee91445
commit 081d78c2fc
1 changed files with 9 additions and 0 deletions
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9
fs/f2fs/super.c
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@ -1149,6 +1149,15 @@ try_onemore:
/* recover fsynced data */
if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
/*
* mount should be failed, when device has readonly mode, and
* previous checkpoint was not done by clean system shutdown.
*/
if (bdev_read_only(sb->s_bdev) &&
!is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) {
err = -EROFS;
goto free_kobj;
}
err = recover_fsync_data(sbi);
if (err) {
f2fs_msg(sb, KERN_ERR,