12e635a27SChris Mason #include <linux/module.h> 262e2749eSChris Mason #include "ctree.h" 362e2749eSChris Mason #include "disk-io.h" 462e2749eSChris Mason #include "hash.h" 5e089f05cSChris Mason #include "transaction.h" 662e2749eSChris Mason 7e089f05cSChris Mason int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root 8d5719762SChris Mason *root, const char *name, int name_len, u64 dir, u64 9e089f05cSChris Mason objectid, u8 type) 1062e2749eSChris Mason { 1162e2749eSChris Mason int ret = 0; 125caf2a00SChris Mason struct btrfs_path *path; 1362e2749eSChris Mason struct btrfs_dir_item *dir_item; 1462e2749eSChris Mason char *name_ptr; 1562e2749eSChris Mason struct btrfs_key key; 1662e2749eSChris Mason u32 data_size; 1762e2749eSChris Mason 1862e2749eSChris Mason key.objectid = dir; 1962e2749eSChris Mason key.flags = 0; 201d4f6404SChris Mason btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); 2162e2749eSChris Mason ret = btrfs_name_hash(name, name_len, &key.offset); 2262e2749eSChris Mason BUG_ON(ret); 235caf2a00SChris Mason path = btrfs_alloc_path(); 245caf2a00SChris Mason btrfs_init_path(path); 2562e2749eSChris Mason data_size = sizeof(*dir_item) + name_len; 265caf2a00SChris Mason ret = btrfs_insert_empty_item(trans, root, path, &key, data_size); 2762e2749eSChris Mason if (ret) 2862e2749eSChris Mason goto out; 2962e2749eSChris Mason 305caf2a00SChris Mason dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), 315caf2a00SChris Mason path->slots[0], 3262e2749eSChris Mason struct btrfs_dir_item); 3362e2749eSChris Mason btrfs_set_dir_objectid(dir_item, objectid); 3462e2749eSChris Mason btrfs_set_dir_type(dir_item, type); 3562e2749eSChris Mason btrfs_set_dir_flags(dir_item, 0); 36a8a2ee0cSChris Mason btrfs_set_dir_name_len(dir_item, name_len); 3762e2749eSChris Mason name_ptr = (char *)(dir_item + 1); 385caf2a00SChris Mason btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len); 395caf2a00SChris Mason btrfs_mark_buffer_dirty(path->nodes[0]); 4062e2749eSChris Mason out: 415caf2a00SChris Mason btrfs_release_path(root, path); 425caf2a00SChris Mason btrfs_free_path(path); 4362e2749eSChris Mason return ret; 4462e2749eSChris Mason } 4562e2749eSChris Mason 46e089f05cSChris Mason int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root 47e20d96d6SChris Mason *root, struct btrfs_path *path, u64 dir, 48e20d96d6SChris Mason const char *name, int name_len, int mod) 4962e2749eSChris Mason { 501d4f6404SChris Mason int ret; 5162e2749eSChris Mason struct btrfs_key key; 521d4f6404SChris Mason int ins_len = mod < 0 ? -1 : 0; 531d4f6404SChris Mason int cow = mod != 0; 5462e2749eSChris Mason 5562e2749eSChris Mason key.objectid = dir; 5662e2749eSChris Mason key.flags = 0; 571d4f6404SChris Mason btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); 5862e2749eSChris Mason ret = btrfs_name_hash(name, name_len, &key.offset); 5962e2749eSChris Mason BUG_ON(ret); 60e089f05cSChris Mason ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); 6162e2749eSChris Mason return ret; 6262e2749eSChris Mason } 6362e2749eSChris Mason 64e089f05cSChris Mason int btrfs_match_dir_item_name(struct btrfs_root *root, 657f5c1516SChris Mason struct btrfs_path *path, 667f5c1516SChris Mason const char *name, int name_len) 6762e2749eSChris Mason { 6862e2749eSChris Mason struct btrfs_dir_item *dir_item; 6962e2749eSChris Mason char *name_ptr; 70a8a2ee0cSChris Mason 71e20d96d6SChris Mason dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), 72e20d96d6SChris Mason path->slots[0], 731d4f6404SChris Mason struct btrfs_dir_item); 74a8a2ee0cSChris Mason if (btrfs_dir_name_len(dir_item) != name_len) 751d4f6404SChris Mason return 0; 76a8a2ee0cSChris Mason name_ptr = (char *)(dir_item + 1); 77a8a2ee0cSChris Mason if (memcmp(name_ptr, name, name_len)) 78a8a2ee0cSChris Mason return 0; 791d4f6404SChris Mason return 1; 8062e2749eSChris Mason } 81