Eric Lee / smarc-fsl-linux-kernel

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fs/btrfs/orphan.c 2.08 KB
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7b1287662   Josef Bacik   Btrfs: Create orp... 
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  /*
   * Copyright (C) 2008 Red Hat.  All rights reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public
   * License v2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public
   * License along with this program; if not, write to the
   * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   * Boston, MA 021110-1307, USA.
   */
  
  #include "ctree.h"
  #include "disk-io.h"
  
  int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
  			     struct btrfs_root *root, u64 offset)
  {
  	struct btrfs_path *path;
  	struct btrfs_key key;
  	int ret = 0;
  
  	key.objectid = BTRFS_ORPHAN_OBJECTID;
  	btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
  	key.offset = offset;
  
  	path = btrfs_alloc_path();
  	if (!path)
  		return -ENOMEM;
  
  	ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
  
  	btrfs_free_path(path);
  	return ret;
  }
  
  int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
  			  struct btrfs_root *root, u64 offset)
  {
  	struct btrfs_path *path;
  	struct btrfs_key key;
  	int ret = 0;
  
  	key.objectid = BTRFS_ORPHAN_OBJECTID;
  	btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
  	key.offset = offset;
  
  	path = btrfs_alloc_path();
  	if (!path)
  		return -ENOMEM;
  
  	ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
7e1fea731   Josef Bacik   Btrfs: fixup retu... 
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  	if (ret < 0)
7b1287662   Josef Bacik   Btrfs: Create orp... 
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  		goto out;
7e1fea731   Josef Bacik   Btrfs: fixup retu... 
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  	if (ret) {
  		ret = -ENOENT;
  		goto out;
  	}
7b1287662   Josef Bacik   Btrfs: Create orp... 
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  	ret = btrfs_del_item(trans, root, path);
  
  out:
  	btrfs_free_path(path);
  	return ret;
  }
4df27c4d5   Yan, Zheng   Btrfs: change how... 
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  int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset)
  {
  	struct btrfs_path *path;
  	struct btrfs_key key;
  	int ret;
  
  	key.objectid = BTRFS_ORPHAN_OBJECTID;
  	key.type = BTRFS_ORPHAN_ITEM_KEY;
  	key.offset = offset;
  
  	path = btrfs_alloc_path();
  	if (!path)
  		return -ENOMEM;
  
  	ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
  
  	btrfs_free_path(path);
  	return ret;
  }