fs/nilfs2/dir.c

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