Icenowy Zheng 38fb6d0ea3 f2fs: use EINVAL for superblock with invalid magic
The kernel mount_block_root() function expects -EACESS or -EINVAL for a
unmountable filesystem when trying to mount the root with different
filesystem types.

However, in 5.3-rc1 the behavior when F2FS code cannot find valid block
changed to return -EFSCORRUPTED(-EUCLEAN), and this error code makes
mount_block_root() fail when trying to probe F2FS.

When the magic number of the superblock mismatches, it has a high
probability that it's just not a F2FS. In this case return -EINVAL seems
to be a better result, and this return value can make mount_block_root()
probing work again.

Return -EINVAL when the superblock has magic mismatch, -EFSCORRUPTED in
other cases (the magic matches but the superblock cannot be recognized).

Fixes: 10f966bbf521 ("f2fs: use generic EFSBADCRC/EFSCORRUPTED")
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-07-28 22:59:14 -07:00
..
2019-07-12 16:54:37 -07:00
\n
2019-07-10 20:09:17 -07:00
2019-07-12 17:37:53 -07:00
2019-07-12 16:54:37 -07:00
2019-07-12 16:54:37 -07:00
2019-07-12 16:54:37 -07:00
2019-07-12 16:54:37 -07:00
2019-07-03 17:52:09 -04:00
2019-07-12 16:54:37 -07:00
2019-07-12 16:54:37 -07:00
2019-06-21 09:58:42 -07:00
\n
2019-07-10 20:27:07 -07:00
\n
2019-07-10 20:09:17 -07:00
2019-07-12 16:54:37 -07:00
\n
2019-07-10 20:27:07 -07:00
2019-07-12 17:17:51 -07:00
2019-04-08 18:21:02 -05:00
2019-03-08 14:48:40 -08:00
2019-07-12 16:54:37 -07:00
2019-07-09 10:45:06 -07:00
2019-07-10 20:29:45 -07:00
2019-07-10 21:22:43 -07:00
2019-01-30 17:44:07 -05:00
2019-04-09 19:20:57 -04:00
2019-02-07 16:38:35 +01:00