btrfs: pass btrfs_inode to btrfs_delete_subvolume

The function is for internal interfaces so we should use the
btrfs_inode.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/btrfs_inode.h

@@ -439,7 +439,7 @@ int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
 int btrfs_add_link(struct btrfs_trans_handle *trans,
 		   struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
 		   const struct fscrypt_str *name, int add_backref, u64 index);
-int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
+int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry);
 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
 			 int front);
 

fs/btrfs/inode.c

@@ -4698,10 +4698,10 @@ static void btrfs_prune_dentries(struct btrfs_root *root)
 	spin_unlock(&root->inode_lock);
 }
 
-int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry)
+int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry)
 {
 	struct btrfs_fs_info *fs_info = btrfs_sb(dentry->d_sb);
-	struct btrfs_root *root = BTRFS_I(dir)->root;
+	struct btrfs_root *root = dir->root;
 	struct inode *inode = d_inode(dentry);
 	struct btrfs_root *dest = BTRFS_I(inode)->root;
 	struct btrfs_trans_handle *trans;
@@ -4758,9 +4758,9 @@ int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry)
 	trans->block_rsv = &block_rsv;
 	trans->bytes_reserved = block_rsv.size;
 
-	btrfs_record_snapshot_destroy(trans, BTRFS_I(dir));
+	btrfs_record_snapshot_destroy(trans, dir);
 
-	ret = btrfs_unlink_subvol(trans, dir, dentry);
+	ret = btrfs_unlink_subvol(trans, &dir->vfs_inode, dentry);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		goto out_end_trans;
@@ -4848,7 +4848,7 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
 			"extent tree v2 doesn't support snapshot deletion yet");
 			return -EOPNOTSUPP;
 		}
-		return btrfs_delete_subvolume(dir, dentry);
+		return btrfs_delete_subvolume(BTRFS_I(dir), dentry);
 	}
 
 	err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &fname);

fs/btrfs/ioctl.c

@@ -2529,7 +2529,7 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
 	}
 
 	btrfs_inode_lock(BTRFS_I(inode), 0);
-	err = btrfs_delete_subvolume(dir, dentry);
+	err = btrfs_delete_subvolume(BTRFS_I(dir), dentry);
 	btrfs_inode_unlock(BTRFS_I(inode), 0);
 	if (!err)
 		d_delete_notify(dir, dentry);