162e2749eSChris Mason #include <stdio.h> 262e2749eSChris Mason #include <stdlib.h> 362e2749eSChris Mason #include "kerncompat.h" 462e2749eSChris Mason #include "radix-tree.h" 562e2749eSChris Mason #include "ctree.h" 662e2749eSChris Mason #include "disk-io.h" 762e2749eSChris Mason #include "hash.h" 8e089f05cSChris Mason #include "transaction.h" 962e2749eSChris Mason 10e089f05cSChris Mason int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root 11e089f05cSChris Mason *root, char *name, int name_len, u64 dir, u64 12e089f05cSChris Mason objectid, u8 type) 1362e2749eSChris Mason { 1462e2749eSChris Mason int ret = 0; 1562e2749eSChris Mason struct btrfs_path path; 1662e2749eSChris Mason struct btrfs_dir_item *dir_item; 1762e2749eSChris Mason char *name_ptr; 1862e2749eSChris Mason struct btrfs_key key; 1962e2749eSChris Mason u32 data_size; 2062e2749eSChris Mason 2162e2749eSChris Mason key.objectid = dir; 2262e2749eSChris Mason key.flags = 0; 231d4f6404SChris Mason btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); 2462e2749eSChris Mason ret = btrfs_name_hash(name, name_len, &key.offset); 2562e2749eSChris Mason BUG_ON(ret); 2662e2749eSChris Mason btrfs_init_path(&path); 2762e2749eSChris Mason data_size = sizeof(*dir_item) + name_len; 28e089f05cSChris Mason ret = btrfs_insert_empty_item(trans, root, &path, &key, data_size); 2962e2749eSChris Mason if (ret) 3062e2749eSChris Mason goto out; 3162e2749eSChris Mason 3262e2749eSChris Mason dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0], 3362e2749eSChris Mason struct btrfs_dir_item); 3462e2749eSChris Mason btrfs_set_dir_objectid(dir_item, objectid); 3562e2749eSChris Mason btrfs_set_dir_type(dir_item, type); 3662e2749eSChris Mason btrfs_set_dir_flags(dir_item, 0); 37a8a2ee0cSChris Mason btrfs_set_dir_name_len(dir_item, name_len); 3862e2749eSChris Mason name_ptr = (char *)(dir_item + 1); 3962e2749eSChris Mason memcpy(name_ptr, name, name_len); 4062e2749eSChris Mason out: 4162e2749eSChris Mason btrfs_release_path(root, &path); 4262e2749eSChris Mason return ret; 4362e2749eSChris Mason } 4462e2749eSChris Mason 45e089f05cSChris Mason int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root 46e089f05cSChris Mason *root, struct btrfs_path *path, u64 dir, char *name, 47e089f05cSChris Mason int name_len, int mod) 4862e2749eSChris Mason { 491d4f6404SChris Mason int ret; 5062e2749eSChris Mason struct btrfs_key key; 511d4f6404SChris Mason int ins_len = mod < 0 ? -1 : 0; 521d4f6404SChris Mason int cow = mod != 0; 5362e2749eSChris Mason 5462e2749eSChris Mason key.objectid = dir; 5562e2749eSChris Mason key.flags = 0; 561d4f6404SChris Mason btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); 5762e2749eSChris Mason ret = btrfs_name_hash(name, name_len, &key.offset); 5862e2749eSChris Mason BUG_ON(ret); 59e089f05cSChris Mason ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); 6062e2749eSChris Mason return ret; 6162e2749eSChris Mason } 6262e2749eSChris Mason 63e089f05cSChris Mason int btrfs_match_dir_item_name(struct btrfs_root *root, 64e089f05cSChris Mason struct btrfs_path *path, char 65e089f05cSChris Mason *name, int name_len) 6662e2749eSChris Mason { 6762e2749eSChris Mason struct btrfs_dir_item *dir_item; 6862e2749eSChris Mason char *name_ptr; 69a8a2ee0cSChris Mason 701d4f6404SChris Mason dir_item = btrfs_item_ptr(&path->nodes[0]->leaf, path->slots[0], 711d4f6404SChris Mason struct btrfs_dir_item); 72a8a2ee0cSChris Mason if (btrfs_dir_name_len(dir_item) != name_len) 731d4f6404SChris Mason return 0; 74a8a2ee0cSChris Mason name_ptr = (char *)(dir_item + 1); 75a8a2ee0cSChris Mason if (memcmp(name_ptr, name, name_len)) 76a8a2ee0cSChris Mason return 0; 771d4f6404SChris Mason return 1; 7862e2749eSChris Mason } 79