Btrfs: add a flags field to btrfs_fs_info

We have a lot of random ints in btrfs_fs_info that can be put into flags.  This
is mostly equivalent with the exception of how we deal with quota going on or
off, now instead we set a flag when we are turning it on or off and deal with
that appropriately, rather than just having a pending state that the current
quota_enabled gets set to.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 3eeb9cd..982a168 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -1874,7 +1874,8 @@
 	 * leads to enospc problems.  This means we also can't do
 	 * delayed inode refs
 	 */
-	if (BTRFS_I(inode)->root->fs_info->log_root_recovering)
+	if (test_bit(BTRFS_FS_LOG_RECOVERING,
+		     &BTRFS_I(inode)->root->fs_info->flags))
 		return -EAGAIN;
 
 	delayed_node = btrfs_get_or_create_delayed_node(inode);