103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
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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 "hash.h"
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int btrfs_insert_dir_item(struct btrfs_root *root, char *name, int name_len,
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u64 dir, u64 objectid, u8 type)
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{
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int ret = 0;
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struct btrfs_path path;
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struct btrfs_dir_item *dir_item;
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char *name_ptr;
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struct btrfs_key key;
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u32 data_size;
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key.objectid = dir;
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key.flags = 0;
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ret = btrfs_name_hash(name, name_len, &key.offset);
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BUG_ON(ret);
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btrfs_init_path(&path);
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data_size = sizeof(*dir_item) + name_len;
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ret = btrfs_insert_empty_item(root, &path, &key, data_size);
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if (ret)
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goto out;
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dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
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struct btrfs_dir_item);
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btrfs_set_dir_objectid(dir_item, objectid);
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btrfs_set_dir_type(dir_item, type);
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btrfs_set_dir_flags(dir_item, 0);
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name_ptr = (char *)(dir_item + 1);
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memcpy(name_ptr, name, name_len);
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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_del_dir_item(struct btrfs_root *root, u64 dir, char *name,
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int name_len)
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{
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int ret = 0;
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struct btrfs_path path;
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struct btrfs_key key;
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key.objectid = dir;
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key.flags = 0;
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ret = btrfs_name_hash(name, name_len, &key.offset);
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BUG_ON(ret);
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btrfs_init_path(&path);
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ret = btrfs_search_slot(root, &key, &path, 0, 1);
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if (ret)
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goto out;
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ret = btrfs_del_item(root, &path);
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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_lookup_dir_item(struct btrfs_root *root, u64 dir, char *name,
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int name_len, u64 *objectid)
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{
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int ret = 0;
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struct btrfs_path path;
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struct btrfs_dir_item *dir_item;
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char *name_ptr;
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struct btrfs_key key;
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u32 item_len;
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struct btrfs_item *item;
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key.objectid = dir;
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key.flags = 0;
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ret = btrfs_name_hash(name, name_len, &key.offset);
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BUG_ON(ret);
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btrfs_init_path(&path);
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ret = btrfs_search_slot(root, &key, &path, 0, 0);
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if (ret)
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goto out;
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dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
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struct btrfs_dir_item);
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item = path.nodes[0]->leaf.items + path.slots[0];
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item_len = btrfs_item_size(item);
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if (item_len != name_len + sizeof(struct btrfs_dir_item)) {
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BUG();
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ret = 1;
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goto out;
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}
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name_ptr = (char *)(dir_item + 1);
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if (memcmp(name_ptr, name, name_len)) {
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BUG();
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ret = 1;
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goto out;
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}
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*objectid = btrfs_dir_objectid(dir_item);
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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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