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btrfs: refuse to remount read-write after abort 

It's still possible to flip the filesystem into RW mode after it's
remounted RO due to an abort. There are lots of places that check for
the superblock error bit and will not write data, but we should not let
the filesystem appear read-write.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
David Sterba 2013-09-13 17:41:20 +02:00 committed by Chris Mason
parent 1cecf579d1
commit 6ef3de9c92
1 changed files with 6 additions and 0 deletions
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6
fs/btrfs/super.c
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@ -1340,6 +1340,12 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
if (ret)
goto restore;
} else {
if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) {
btrfs_err(fs_info,
"Remounting read-write after error is not allowed\n");
ret = -EINVAL;
goto restore;
}
if (fs_info->fs_devices->rw_devices == 0) {
ret = -EACCES;
goto restore;