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100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
#include <linux/module.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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#include "transaction.h"
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int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, const char *name, int name_len, u64 dir, u64
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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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btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
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ret = btrfs_name_hash(name, name_len, &key.offset);
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BUG_ON(ret);
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path = btrfs_alloc_path();
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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(trans, 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(btrfs_buffer_leaf(path->nodes[0]),
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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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btrfs_set_dir_name_len(dir_item, name_len);
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name_ptr = (char *)(dir_item + 1);
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btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
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btrfs_mark_buffer_dirty(path->nodes[0]);
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btrfs_release_path(root, path);
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btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
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key.offset = objectid;
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ret = btrfs_insert_empty_item(trans, root, path, &key, data_size);
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// FIXME clear the dirindex bit
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if (ret)
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goto out;
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dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
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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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btrfs_set_dir_name_len(dir_item, name_len);
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name_ptr = (char *)(dir_item + 1);
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btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
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btrfs_mark_buffer_dirty(path->nodes[0]);
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out:
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btrfs_release_path(root, path);
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btrfs_free_path(path);
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return ret;
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}
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int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, struct btrfs_path *path, u64 dir,
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const char *name, int name_len, int mod)
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{
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int ret;
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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 = dir;
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key.flags = 0;
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btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
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ret = btrfs_name_hash(name, name_len, &key.offset);
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BUG_ON(ret);
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ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
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return ret;
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}
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int btrfs_match_dir_item_name(struct btrfs_root *root,
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struct btrfs_path *path,
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const char *name, int name_len)
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{
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struct btrfs_dir_item *dir_item;
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char *name_ptr;
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dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
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path->slots[0],
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struct btrfs_dir_item);
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if (btrfs_dir_name_len(dir_item) != name_len)
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return 0;
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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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return 0;
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return 1;
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}
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