fs/btrfs/inode-item.c

84 			  struct btrfs_path *path,
96 	ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
101 	return btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0],
112 	struct btrfs_path *path;
126 	path = btrfs_alloc_path();
127 	if (!path)
130 	ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
141 	extref = btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0],
149 	leaf = path->nodes[0];
150 	item_size = btrfs_item_size(leaf, path->slots[0]);
159 		ret = btrfs_del_item(trans, root, path);
164 	item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
169 	btrfs_truncate_item(trans, path, item_size - del_len, 1);
172 	btrfs_free_path(path);
181 	struct btrfs_path *path;
197 	path = btrfs_alloc_path();
198 	if (!path)
201 	ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
210 	ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], name);
216 	leaf = path->nodes[0];
217 	item_size = btrfs_item_size(leaf, path->slots[0]);
223 		ret = btrfs_del_item(trans, root, path);
228 	item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
231 	btrfs_truncate_item(trans, path, item_size - sub_item_len, 1);
233 	btrfs_free_path(path);
263 	struct btrfs_path *path;
271 	path = btrfs_alloc_path();
272 	if (!path)
275 	ret = btrfs_insert_empty_item(trans, root, path, &key,
278 		if (btrfs_find_name_in_ext_backref(path->nodes[0],
279 						   path->slots[0],
284 		btrfs_extend_item(trans, path, ins_len);
290 	leaf = path->nodes[0];
291 	ptr = (unsigned long)btrfs_item_ptr(leaf, path->slots[0], char);
292 	ptr += btrfs_item_size(leaf, path->slots[0]) - ins_len;
295 	btrfs_set_inode_extref_name_len(path->nodes[0], extref, name->len);
296 	btrfs_set_inode_extref_index(path->nodes[0], extref, index);
297 	btrfs_set_inode_extref_parent(path->nodes[0], extref, ref_objectid);
300 	write_extent_buffer(path->nodes[0], name->name, ptr, name->len);
301 	btrfs_mark_buffer_dirty(trans, path->nodes[0]);
304 	btrfs_free_path(path);
308 /* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */
314 	struct btrfs_path *path;
325 	path = btrfs_alloc_path();
326 	if (!path)
329 	path->skip_release_on_error = 1;
330 	ret = btrfs_insert_empty_item(trans, root, path, &key,
334 		ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
339 		old_size = btrfs_item_size(path->nodes[0], path->slots[0]);
340 		btrfs_extend_item(trans, path, ins_len);
341 		ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
344 		btrfs_set_inode_ref_name_len(path->nodes[0], ref, name->len);
345 		btrfs_set_inode_ref_index(path->nodes[0], ref, index);
350 			if (btrfs_find_name_in_backref(path->nodes[0],
351 						       path->slots[0],
359 		ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
361 		btrfs_set_inode_ref_name_len(path->nodes[0], ref, name->len);
362 		btrfs_set_inode_ref_index(path->nodes[0], ref, index);
365 	write_extent_buffer(path->nodes[0], name->name, ptr, name->len);
366 	btrfs_mark_buffer_dirty(trans, path->nodes[0]);
369 	btrfs_free_path(path);
387 			     struct btrfs_path *path, u64 objectid)
395 	ret = btrfs_insert_empty_item(trans, root, path, &key,
401 		       *root, struct btrfs_path *path,
411 	ret = btrfs_search_slot(trans, root, location, path, ins_len, cow);
413 	    location->offset == (u64)-1 && path->slots[0] != 0) {
414 		slot = path->slots[0] - 1;
415 		leaf = path->nodes[0];
419 			path->slots[0]--;
463 	struct btrfs_path *path;
494 	path = btrfs_alloc_path();
495 	if (!path)
497 	path->reada = READA_BACK;
515 	ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
522 		if (path->slots[0] == 0)
524 		path->slots[0]--;
532 		leaf = path->nodes[0];
533 		btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
544 			fi = btrfs_item_ptr(leaf, path->slots[0],
555 					     path->slots[0]);
619 				btrfs_truncate_item(trans, path, size, 1);
642 		 * normal truncate path.
655 			       ((path->slots[0] + 1) == pending_del_slot));
660 				pending_del_slot = path->slots[0];
662 			} else if (path->slots[0] + 1 == pending_del_slot) {
665 				pending_del_slot = path->slots[0];
695 		if (path->slots[0] == 0 ||
696 		    path->slots[0] != pending_del_slot ||
699 				ret = btrfs_del_items(trans, root, path,
708 			btrfs_release_path(path);
730 			path->slots[0]--;
737 		err = btrfs_del_items(trans, root, path, pending_del_slot,
749 	btrfs_free_path(path);