213  * len <= NILFS_NAME_LEN and de != NULL are guaranteed by caller.
216 nilfs_match(int len, const unsigned char *name, struct nilfs_dir_entry *de)  in nilfs_match()  argument
218 	if (len != de->name_len)  in nilfs_match()
220 	if (!de->inode)  in nilfs_match()
222 	return !memcmp(name, de->name, len);  in nilfs_match()
248 		struct nilfs_dir_entry *de;  in nilfs_readdir()  local
257 		de = (struct nilfs_dir_entry *)(kaddr + offset);  in nilfs_readdir()
260 		for ( ; (char *)de <= limit; de = nilfs_next_entry(de)) {  in nilfs_readdir()
261 			if (de->rec_len == 0) {  in nilfs_readdir()
266 			if (de->inode) {  in nilfs_readdir()
269 				t = fs_ftype_to_dtype(de->file_type);  in nilfs_readdir()
271 				if (!dir_emit(ctx, de->name, de->name_len,  in nilfs_readdir()
272 						le64_to_cpu(de->inode), t)) {  in nilfs_readdir()
277 			ctx->pos += nilfs_rec_len_from_disk(de->rec_len);  in nilfs_readdir()
303 	struct nilfs_dir_entry *de;  in nilfs_find_entry()  local
318 		de = (struct nilfs_dir_entry *)kaddr;  in nilfs_find_entry()
320 		while ((char *)de <= kaddr) {  in nilfs_find_entry()
321 			if (de->rec_len == 0) {  in nilfs_find_entry()
327 			if (nilfs_match(namelen, name, de))  in nilfs_find_entry()
329 			de = nilfs_next_entry(de);  in nilfs_find_entry()
349 	return de;  in nilfs_find_entry()
355 	struct nilfs_dir_entry *de, *next_de;  in nilfs_dotdot()  local
359 	de = nilfs_get_folio(dir, 0, &folio);  in nilfs_dotdot()
360 	if (IS_ERR(de))  in nilfs_dotdot()
364 	if (unlikely(!limit || le64_to_cpu(de->inode) != dir->i_ino ||  in nilfs_dotdot()
365 		     !nilfs_match(1, ".", de))) {  in nilfs_dotdot()
370 	next_de = nilfs_next_entry(de);  in nilfs_dotdot()
375 	if (unlikely((char *)next_de == (char *)de + nilfs_chunk_size(dir) ||  in nilfs_dotdot()
385 	folio_release_kmap(folio, de);  in nilfs_dotdot()
391 	struct nilfs_dir_entry *de;  in nilfs_inode_by_name()  local
394 	de = nilfs_find_entry(dir, qstr, &folio);  in nilfs_inode_by_name()
395 	if (IS_ERR(de))  in nilfs_inode_by_name()
396 		return PTR_ERR(de);  in nilfs_inode_by_name()
398 	*ino = le64_to_cpu(de->inode);  in nilfs_inode_by_name()
399 	folio_release_kmap(folio, de);  in nilfs_inode_by_name()
403 int nilfs_set_link(struct inode *dir, struct nilfs_dir_entry *de,  in nilfs_set_link()  argument
406 	size_t from = offset_in_folio(folio, de);  in nilfs_set_link()
407 	size_t to = from + nilfs_rec_len_from_disk(de->rec_len);  in nilfs_set_link()
417 	de->inode = cpu_to_le64(inode->i_ino);  in nilfs_set_link()
418 	de->file_type = fs_umode_to_ftype(inode->i_mode);  in nilfs_set_link()
436 	struct nilfs_dir_entry *de;  in nilfs_add_link()  local
455 		de = (struct nilfs_dir_entry *)kaddr;  in nilfs_add_link()
457 		while ((char *)de <= kaddr) {  in nilfs_add_link()
458 			if ((char *)de == dir_end) {  in nilfs_add_link()
462 				de->rec_len = nilfs_rec_len_to_disk(chunk_size);  in nilfs_add_link()
463 				de->inode = 0;  in nilfs_add_link()
466 			if (de->rec_len == 0) {  in nilfs_add_link()
473 			if (nilfs_match(namelen, name, de))  in nilfs_add_link()
475 			name_len = NILFS_DIR_REC_LEN(de->name_len);  in nilfs_add_link()
476 			rec_len = nilfs_rec_len_from_disk(de->rec_len);  in nilfs_add_link()
477 			if (!de->inode && rec_len >= reclen)  in nilfs_add_link()
481 			de = (struct nilfs_dir_entry *)((char *)de + rec_len);  in nilfs_add_link()
490 	from = offset_in_folio(folio, de);  in nilfs_add_link()
495 	if (de->inode) {  in nilfs_add_link()
498 		de1 = (struct nilfs_dir_entry *)((char *)de + name_len);  in nilfs_add_link()
500 		de->rec_len = nilfs_rec_len_to_disk(name_len);  in nilfs_add_link()
501 		de = de1;  in nilfs_add_link()
503 	de->name_len = namelen;  in nilfs_add_link()
504 	memcpy(de->name, name, namelen);  in nilfs_add_link()
505 	de->inode = cpu_to_le64(inode->i_ino);  in nilfs_add_link()
506 	de->file_type = fs_umode_to_ftype(inode->i_mode);  in nilfs_add_link()
512 	folio_release_kmap(folio, de);  in nilfs_add_link()
529 	struct nilfs_dir_entry *de, *pde = NULL;  in nilfs_delete_entry()  local
534 	de = (struct nilfs_dir_entry *)(kaddr + from);  in nilfs_delete_entry()
536 	while ((char *)de < (char *)dir) {  in nilfs_delete_entry()
537 		if (de->rec_len == 0) {  in nilfs_delete_entry()
543 		pde = de;  in nilfs_delete_entry()
544 		de = nilfs_next_entry(de);  in nilfs_delete_entry()
571 	struct nilfs_dir_entry *de;  in nilfs_make_empty()  local
585 	de = (struct nilfs_dir_entry *)kaddr;  in nilfs_make_empty()
586 	de->name_len = 1;  in nilfs_make_empty()
587 	de->rec_len = nilfs_rec_len_to_disk(NILFS_DIR_REC_LEN(1));  in nilfs_make_empty()
588 	memcpy(de->name, ".\0\0", 4);  in nilfs_make_empty()
589 	de->inode = cpu_to_le64(inode->i_ino);  in nilfs_make_empty()
590 	de->file_type = fs_umode_to_ftype(inode->i_mode);  in nilfs_make_empty()
592 	de = (struct nilfs_dir_entry *)(kaddr + NILFS_DIR_REC_LEN(1));  in nilfs_make_empty()
593 	de->name_len = 2;  in nilfs_make_empty()
594 	de->rec_len = nilfs_rec_len_to_disk(chunk_size - NILFS_DIR_REC_LEN(1));  in nilfs_make_empty()
595 	de->inode = cpu_to_le64(parent->i_ino);  in nilfs_make_empty()
596 	memcpy(de->name, "..\0", 4);  in nilfs_make_empty()
597 	de->file_type = fs_umode_to_ftype(inode->i_mode);  in nilfs_make_empty()
615 		struct nilfs_dir_entry *de;  in nilfs_empty_dir()  local
621 		de = (struct nilfs_dir_entry *)kaddr;  in nilfs_empty_dir()
624 		while ((char *)de <= kaddr) {  in nilfs_empty_dir()
625 			if (de->rec_len == 0) {  in nilfs_empty_dir()
627 					    "zero-length directory entry (kaddr=%p, de=%p)",  in nilfs_empty_dir()
628 					    kaddr, de);  in nilfs_empty_dir()
631 			if (de->inode != 0) {  in nilfs_empty_dir()
633 				if (de->name[0] != '.')  in nilfs_empty_dir()
635 				if (de->name_len > 2)  in nilfs_empty_dir()
637 				if (de->name_len < 2) {  in nilfs_empty_dir()
638 					if (de->inode !=  in nilfs_empty_dir()
641 				} else if (de->name[1] != '.')  in nilfs_empty_dir()
644 			de = nilfs_next_entry(de);  in nilfs_empty_dir()