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Btrfs: don't bother autodefragging if our root is going away 

We can end up with inodes on the auto defrag list that exist on roots that are
going to be deleted.  This is extra work we don't need to do, so just bail if
our root has 0 root refs.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Josef Bacik 2013-07-26 09:13:15 -04:00 committed by Chris Mason
parent b37b39cd6b
commit 2112ac800d
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/file.c
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@ -310,6 +310,11 @@ static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info,
goto cleanup;
}
if (btrfs_root_refs(&inode_root->root_item) == 0) {
ret = -ENOENT;
goto cleanup;
}
key.objectid = defrag->ino;
btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
key.offset = 0;