diff options
| author | Dave Young <hidave.darkstar@gmail.com> | 2011-01-08 13:09:13 +0300 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-01-16 19:30:19 +0300 |
| commit | 20b450773d17e325190c158e10bfdb25dc21d2d6 (patch) | |
| tree | c99c3d8cedbf8fb5f01ed42d7d3c5b5bd5fd9d69 /fs/btrfs/disk-io.c | |
| parent | 42838bb265b9cff3de9587fcacc398b5112dc2d9 (diff) | |
| download | linux-20b450773d17e325190c158e10bfdb25dc21d2d6.tar.xz | |
btrfs: mount failure return value fix
I happened to pass swap partition as root partition in cmdline,
then kernel panic and tell me about "Cannot open root device".
It is not correct, in fact it is a fs type mismatch instead of 'no device'.
Eventually I found btrfs mounting failed with -EIO, it should be -EINVAL.
The logic in init/do_mounts.c:
for (p = fs_names; *p; p += strlen(p)+1) {
int err = do_mount_root(name, p, flags, root_mount_data);
switch (err) {
case 0:
goto out;
case -EACCES:
flags |= MS_RDONLY;
goto retry;
case -EINVAL:
continue;
}
print "Cannot open root device"
panic
}
SO fs type after btrfs will have no chance to mount
Here fix the return value as -EINVAL
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index f88eb2ce7919..f9efb68fc2e3 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1713,8 +1713,10 @@ struct btrfs_root *open_ctree(struct super_block *sb, fs_info, BTRFS_ROOT_TREE_OBJECTID); bh = btrfs_read_dev_super(fs_devices->latest_bdev); - if (!bh) + if (!bh) { + err = -EINVAL; goto fail_iput; + } memcpy(&fs_info->super_copy, bh->b_data, sizeof(fs_info->super_copy)); memcpy(&fs_info->super_for_commit, &fs_info->super_copy, |