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f1ace244c8
Attaching below is some of the code cleanups that i came across while reading the code. a) alloc_path already calls init_path. b) Mention that btrfs_inode is the in memory copy.Ext4 have ext4_inode_info as the in memory copy ext4_inode as the disk copy Signed-off-by: Chris Mason <chris.mason@oracle.com>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
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* Copyright (C) 2007 Oracle. 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 <linux/module.h>
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#include "ctree.h"
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#include "disk-io.h"
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#include "transaction.h"
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int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, u64 objectid, struct btrfs_inode_item
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*inode_item)
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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 = objectid;
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key.flags = 0;
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btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
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key.offset = 0;
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path = btrfs_alloc_path();
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BUG_ON(!path);
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ret = btrfs_insert_item(trans, root, &key, inode_item,
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sizeof(*inode_item));
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btrfs_release_path(root, path);
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btrfs_free_path(path);
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if (ret == 0 && objectid > root->highest_inode)
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root->highest_inode = objectid;
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return ret;
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}
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int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, struct btrfs_path *path,
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struct btrfs_key *location, int mod)
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{
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int ins_len = mod < 0 ? -1 : 0;
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int cow = mod != 0;
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int ret;
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int slot;
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struct btrfs_leaf *leaf;
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struct btrfs_key found_key;
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ret = btrfs_search_slot(trans, root, location, path, ins_len, cow);
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if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY &&
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location->offset == (u64)-1 && path->slots[0] != 0) {
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slot = path->slots[0] - 1;
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leaf = btrfs_buffer_leaf(path->nodes[0]);
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btrfs_disk_key_to_cpu(&found_key, &leaf->items[slot].key);
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if (found_key.objectid == location->objectid &&
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btrfs_key_type(&found_key) == btrfs_key_type(location)) {
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path->slots[0]--;
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return 0;
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}
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}
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return ret;
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}
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