110 lines
3.0 KiB
C
110 lines
3.0 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 <stdio.h>
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#include <stdlib.h>
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#include "kerncompat.h"
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#include "radix-tree.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_ref(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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const char *name, int name_len,
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u64 inode_objectid, u64 ref_objectid)
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{
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struct btrfs_path path;
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struct btrfs_key key;
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struct btrfs_inode_ref *ref;
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char *ptr;
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int ret;
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int ins_len = name_len + sizeof(*ref);
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key.objectid = inode_objectid;
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key.offset = ref_objectid;
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btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
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btrfs_init_path(&path);
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ret = btrfs_insert_empty_item(trans, root, &path, &key,
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ins_len);
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if (ret == -EEXIST) {
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#if 0
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u32 old_size;
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if (find_name_in_backref(path, name, name_len, &ref))
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goto out;
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old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
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ret = btrfs_extend_item(trans, root, path, ins_len);
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BUG_ON(ret);
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ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_inode_ref);
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ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);
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btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len);
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ptr = (unsigned long)(ref + 1);
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ret = 0;
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#endif
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goto out;
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} else if (ret < 0) {
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goto out;
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} else {
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ref = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
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struct btrfs_inode_ref);
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btrfs_set_inode_ref_name_len(ref, name_len);
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ptr = (char *)(ref + 1);
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}
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memcpy(ptr, name, name_len);
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dirty_tree_block(trans, root, path.nodes[0]);
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out:
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btrfs_release_path(root, &path);
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return ret;
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}
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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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btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
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key.offset = 0;
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btrfs_init_path(&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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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, u64 objectid, int mod)
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{
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struct btrfs_key key;
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int ins_len = mod < 0 ? -1 : 0;
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int cow = mod != 0;
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key.objectid = objectid;
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btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
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key.offset = 0;
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return btrfs_search_slot(trans, root, &key, path, ins_len, cow);
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}
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