208  * len <= NILFS_NAME_LEN and de != NULL are guaranteed by caller.
211 nilfs_match(int len, const unsigned char *name, struct nilfs_dir_entry *de)  in nilfs_match()  argument
213 	if (len != de->name_len)  in nilfs_match()
215 	if (!de->inode)  in nilfs_match()
217 	return !memcmp(name, de->name, len);  in nilfs_match()
253 static void nilfs_set_de_type(struct nilfs_dir_entry *de, struct inode *inode)  in nilfs_set_de_type()  argument
257 	de->file_type = nilfs_type_by_mode[(mode & S_IFMT)>>S_SHIFT];  in nilfs_set_de_type()
274 		struct nilfs_dir_entry *de;  in nilfs_readdir()  local
283 		de = (struct nilfs_dir_entry *)(kaddr + offset);  in nilfs_readdir()
286 		for ( ; (char *)de <= limit; de = nilfs_next_entry(de)) {  in nilfs_readdir()
287 			if (de->rec_len == 0) {  in nilfs_readdir()
292 			if (de->inode) {  in nilfs_readdir()
295 				if (de->file_type < NILFS_FT_MAX)  in nilfs_readdir()
296 					t = nilfs_filetype_table[de->file_type];  in nilfs_readdir()
300 				if (!dir_emit(ctx, de->name, de->name_len,  in nilfs_readdir()
301 						le64_to_cpu(de->inode), t)) {  in nilfs_readdir()
306 			ctx->pos += nilfs_rec_len_from_disk(de->rec_len);  in nilfs_readdir()
332 	struct nilfs_dir_entry *de;  in nilfs_find_entry()  local
345 			de = (struct nilfs_dir_entry *)kaddr;  in nilfs_find_entry()
347 			while ((char *) de <= kaddr) {  in nilfs_find_entry()
348 				if (de->rec_len == 0) {  in nilfs_find_entry()
354 				if (nilfs_match(namelen, name, de))  in nilfs_find_entry()
356 				de = nilfs_next_entry(de);  in nilfs_find_entry()
376 	return de;  in nilfs_find_entry()
381 	struct nilfs_dir_entry *de = nilfs_get_folio(dir, 0, foliop);  in nilfs_dotdot()  local
383 	if (IS_ERR(de))  in nilfs_dotdot()
385 	return nilfs_next_entry(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 (de) {  in nilfs_inode_by_name()
396 		res = le64_to_cpu(de->inode);  in nilfs_inode_by_name()
397 		folio_release_kmap(folio, de);  in nilfs_inode_by_name()
402 void nilfs_set_link(struct inode *dir, struct nilfs_dir_entry *de,  in nilfs_set_link()  argument
405 	size_t from = offset_in_folio(folio, de);  in nilfs_set_link()
406 	size_t to = from + nilfs_rec_len_from_disk(de->rec_len);  in nilfs_set_link()
413 	de->inode = cpu_to_le64(inode->i_ino);  in nilfs_set_link()
414 	nilfs_set_de_type(de, inode);  in nilfs_set_link()
431 	struct nilfs_dir_entry *de;  in nilfs_add_link()  local
450 		de = (struct nilfs_dir_entry *)kaddr;  in nilfs_add_link()
452 		while ((char *)de <= kaddr) {  in nilfs_add_link()
453 			if ((char *)de == dir_end) {  in nilfs_add_link()
457 				de->rec_len = nilfs_rec_len_to_disk(chunk_size);  in nilfs_add_link()
458 				de->inode = 0;  in nilfs_add_link()
461 			if (de->rec_len == 0) {  in nilfs_add_link()
468 			if (nilfs_match(namelen, name, de))  in nilfs_add_link()
470 			name_len = NILFS_DIR_REC_LEN(de->name_len);  in nilfs_add_link()
471 			rec_len = nilfs_rec_len_from_disk(de->rec_len);  in nilfs_add_link()
472 			if (!de->inode && rec_len >= reclen)  in nilfs_add_link()
476 			de = (struct nilfs_dir_entry *)((char *)de + rec_len);  in nilfs_add_link()
485 	from = offset_in_folio(folio, de);  in nilfs_add_link()
490 	if (de->inode) {  in nilfs_add_link()
493 		de1 = (struct nilfs_dir_entry *)((char *)de + name_len);  in nilfs_add_link()
495 		de->rec_len = nilfs_rec_len_to_disk(name_len);  in nilfs_add_link()
496 		de = de1;  in nilfs_add_link()
498 	de->name_len = namelen;  in nilfs_add_link()
499 	memcpy(de->name, name, namelen);  in nilfs_add_link()
500 	de->inode = cpu_to_le64(inode->i_ino);  in nilfs_add_link()
501 	nilfs_set_de_type(de, inode);  in nilfs_add_link()
507 	folio_release_kmap(folio, de);  in nilfs_add_link()
524 	struct nilfs_dir_entry *de, *pde = NULL;  in nilfs_delete_entry()  local
529 	de = (struct nilfs_dir_entry *)(kaddr + from);  in nilfs_delete_entry()
531 	while ((char *)de < (char *)dir) {  in nilfs_delete_entry()
532 		if (de->rec_len == 0) {  in nilfs_delete_entry()
538 		pde = de;  in nilfs_delete_entry()
539 		de = nilfs_next_entry(de);  in nilfs_delete_entry()
563 	struct nilfs_dir_entry *de;  in nilfs_make_empty()  local
577 	de = (struct nilfs_dir_entry *)kaddr;  in nilfs_make_empty()
578 	de->name_len = 1;  in nilfs_make_empty()
579 	de->rec_len = nilfs_rec_len_to_disk(NILFS_DIR_REC_LEN(1));  in nilfs_make_empty()
580 	memcpy(de->name, ".\0\0", 4);  in nilfs_make_empty()
581 	de->inode = cpu_to_le64(inode->i_ino);  in nilfs_make_empty()
582 	nilfs_set_de_type(de, inode);  in nilfs_make_empty()
584 	de = (struct nilfs_dir_entry *)(kaddr + NILFS_DIR_REC_LEN(1));  in nilfs_make_empty()
585 	de->name_len = 2;  in nilfs_make_empty()
586 	de->rec_len = nilfs_rec_len_to_disk(chunk_size - NILFS_DIR_REC_LEN(1));  in nilfs_make_empty()
587 	de->inode = cpu_to_le64(parent->i_ino);  in nilfs_make_empty()
588 	memcpy(de->name, "..\0", 4);  in nilfs_make_empty()
589 	nilfs_set_de_type(de, inode);  in nilfs_make_empty()
607 		struct nilfs_dir_entry *de;  in nilfs_empty_dir()  local
613 		de = (struct nilfs_dir_entry *)kaddr;  in nilfs_empty_dir()
616 		while ((char *)de <= kaddr) {  in nilfs_empty_dir()
617 			if (de->rec_len == 0) {  in nilfs_empty_dir()
619 					    "zero-length directory entry (kaddr=%p, de=%p)",  in nilfs_empty_dir()
620 					    kaddr, de);  in nilfs_empty_dir()
623 			if (de->inode != 0) {  in nilfs_empty_dir()
625 				if (de->name[0] != '.')  in nilfs_empty_dir()
627 				if (de->name_len > 2)  in nilfs_empty_dir()
629 				if (de->name_len < 2) {  in nilfs_empty_dir()
630 					if (de->inode !=  in nilfs_empty_dir()
633 				} else if (de->name[1] != '.')  in nilfs_empty_dir()
636 			de = nilfs_next_entry(de);  in nilfs_empty_dir()