79787eaab4
btrfs currently handles most errors with BUG_ON. This patch is a work-in- progress but aims to handle most errors other than internal logic errors and ENOMEM more gracefully. This iteration prevents most crashes but can run into lockups with the page lock on occasion when the timing "works out." Signed-off-by: Jeff Mahoney <jeffm@suse.com>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* Copyright (C) 2008 Red Hat. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include "ctree.h"
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#include "disk-io.h"
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int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, u64 offset)
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{
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struct btrfs_path *path;
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struct btrfs_key key;
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int ret = 0;
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key.objectid = BTRFS_ORPHAN_OBJECTID;
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btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
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key.offset = offset;
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path = btrfs_alloc_path();
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if (!path)
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return -ENOMEM;
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ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
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btrfs_free_path(path);
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return ret;
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}
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int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, u64 offset)
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{
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struct btrfs_path *path;
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struct btrfs_key key;
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int ret = 0;
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key.objectid = BTRFS_ORPHAN_OBJECTID;
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btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
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key.offset = offset;
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path = btrfs_alloc_path();
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if (!path)
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return -ENOMEM;
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ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
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if (ret < 0)
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goto out;
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if (ret) { /* JDM: Really? */
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ret = -ENOENT;
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goto out;
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}
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ret = btrfs_del_item(trans, root, path);
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out:
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btrfs_free_path(path);
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return ret;
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}
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int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset)
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{
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struct btrfs_path *path;
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struct btrfs_key key;
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int ret;
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key.objectid = BTRFS_ORPHAN_OBJECTID;
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key.type = BTRFS_ORPHAN_ITEM_KEY;
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key.offset = offset;
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path = btrfs_alloc_path();
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if (!path)
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return -ENOMEM;
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ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
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btrfs_free_path(path);
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return ret;
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}
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