111 	int depth, i;  in ext4_ext_drop_refs()  local
115 	depth = path->p_depth;  in ext4_ext_drop_refs()
116 	for (i = 0; i <= depth; i++, path++) {  in ext4_ext_drop_refs()
215 		int depth = path->p_depth;  in ext4_ext_find_goal()  local
235 		ex = path[depth].p_ext;  in ext4_ext_find_goal()
248 		if (path[depth].p_bh)  in ext4_ext_find_goal()
249 			return path[depth].p_bh->b_blocknr;  in ext4_ext_find_goal()
344 ext4_ext_max_entries(struct inode *inode, int depth)  in ext4_ext_max_entries()  argument
348 	if (depth == ext_depth(inode)) {  in ext4_ext_max_entries()
349 		if (depth == 0)  in ext4_ext_max_entries()
354 		if (depth == 0)  in ext4_ext_max_entries()
390 				     int depth)  in ext4_valid_extent_entries()  argument
401 	if (depth == 0) {  in ext4_valid_extent_entries()
409 		if (depth != ext_depth(inode) &&  in ext4_valid_extent_entries()
433 		if (depth != ext_depth(inode) &&  in ext4_valid_extent_entries()
456 			    int depth, ext4_fsblk_t pblk, ext4_lblk_t lblk)  in __ext4_ext_check()  argument
465 	if (unlikely(le16_to_cpu(eh->eh_depth) != depth)) {  in __ext4_ext_check()
473 	max = ext4_ext_max_entries(inode, depth);  in __ext4_ext_check()
482 	if (unlikely((eh->eh_entries == 0) && (depth > 0))) {  in __ext4_ext_check()
486 	if (!ext4_valid_extent_entries(inode, eh, lblk, &pblk, depth)) {  in __ext4_ext_check()
490 	if (unlikely(depth > 32)) {  in __ext4_ext_check()
495 	if (ext_depth(inode) != depth &&  in __ext4_ext_check()
511 			     max, le16_to_cpu(eh->eh_depth), depth);  in __ext4_ext_check()
515 #define ext4_ext_check(inode, eh, depth, pblk)			\  argument
516 	__ext4_ext_check(__func__, __LINE__, (inode), (eh), (depth), (pblk), 0)
550 			 int depth, int flags)  in __read_extent_tree_block()  argument
574 			       depth, pblk, le32_to_cpu(idx->ei_block));  in __read_extent_tree_block()
581 	if (!(flags & EXT4_EX_NOCACHE) && depth == 0) {  in __read_extent_tree_block()
592 #define read_extent_tree_block(inode, idx, depth, flags)		\  argument
594 				 (depth), (flags))
605 	int i = 0, depth, ret = 0;  in ext4_ext_precache()  local
611 	depth = ext_depth(inode);  in ext4_ext_precache()
614 	if (!depth) {  in ext4_ext_precache()
619 	path = kcalloc(depth + 1, sizeof(struct ext4_ext_path),  in ext4_ext_precache()
627 	ret = ext4_ext_check(inode, path[0].p_hdr, depth, 0);  in ext4_ext_precache()
636 		if ((i == depth) ||  in ext4_ext_precache()
644 					    depth - i - 1,  in ext4_ext_precache()
687 	int depth = ext_depth(inode);  in ext4_ext_show_leaf()  local
695 	eh = path[depth].p_hdr;  in ext4_ext_show_leaf()
711 	int depth = ext_depth(inode);  in ext4_ext_show_move()  local
714 	if (depth != level) {  in ext4_ext_show_move()
727 	ex = path[depth].p_ext;  in ext4_ext_show_move()
728 	while (ex <= EXT_MAX_EXTENT(path[depth].p_hdr)) {  in ext4_ext_show_move()
889 	short int depth, i, ppos = 0;  in ext4_find_extent()  local
897 	depth = ext_depth(inode);  in ext4_find_extent()
898 	if (depth < 0 || depth > EXT4_MAX_EXTENT_DEPTH) {  in ext4_find_extent()
900 				 depth);  in ext4_find_extent()
907 		if (depth > path[0].p_maxdepth) {  in ext4_find_extent()
914 		path = kcalloc(depth + 2, sizeof(struct ext4_ext_path),  in ext4_find_extent()
918 		path[0].p_maxdepth = depth + 1;  in ext4_find_extent()
923 	i = depth;  in ext4_find_extent()
924 	if (!(flags & EXT4_EX_NOCACHE) && depth == 0)  in ext4_find_extent()
1058 	int depth = ext_depth(inode);  in ext4_ext_split()  local
1077 	if (unlikely(path[depth].p_ext > EXT_MAX_EXTENT(path[depth].p_hdr))) {  in ext4_ext_split()
1081 	if (path[depth].p_ext != EXT_MAX_EXTENT(path[depth].p_hdr)) {  in ext4_ext_split()
1082 		border = path[depth].p_ext[1].ee_block;  in ext4_ext_split()
1105 	ablocks = kcalloc(depth, sizeof(ext4_fsblk_t), gfp_flags);  in ext4_ext_split()
1110 	ext_debug(inode, "allocate %d blocks for indexes/leaf\n", depth - at);  in ext4_ext_split()
1111 	for (a = 0; a < depth - at; a++) {  in ext4_ext_split()
1146 	if (unlikely(path[depth].p_hdr->eh_entries !=  in ext4_ext_split()
1147 		     path[depth].p_hdr->eh_max)) {  in ext4_ext_split()
1149 				 path[depth].p_hdr->eh_entries,  in ext4_ext_split()
1150 				 path[depth].p_hdr->eh_max);  in ext4_ext_split()
1155 	m = EXT_MAX_EXTENT(path[depth].p_hdr) - path[depth].p_ext++;  in ext4_ext_split()
1156 	ext4_ext_show_move(inode, path, newblock, depth);  in ext4_ext_split()
1160 		memmove(ex, path[depth].p_ext, sizeof(struct ext4_extent) * m);  in ext4_ext_split()
1180 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_split()
1183 		le16_add_cpu(&path[depth].p_hdr->eh_entries, -m);  in ext4_ext_split()
1184 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_split()
1191 	k = depth - at - 1;  in ext4_ext_split()
1201 	i = depth - 1;  in ext4_ext_split()
1221 		neh->eh_depth = cpu_to_le16(depth - i);  in ext4_ext_split()
1291 		for (i = 0; i < depth; i++) {  in ext4_ext_split()
1406 	int depth, i, err = 0;  in ext4_ext_create_new_leaf()  local
1409 	i = depth = ext_depth(inode);  in ext4_ext_create_new_leaf()
1412 	curp = path + depth;  in ext4_ext_create_new_leaf()
1452 		depth = ext_depth(inode);  in ext4_ext_create_new_leaf()
1453 		if (path[depth].p_hdr->eh_entries == path[depth].p_hdr->eh_max) {  in ext4_ext_create_new_leaf()
1476 	int depth, ee_len;  in ext4_ext_search_left()  local
1482 	depth = path->p_depth;  in ext4_ext_search_left()
1485 	if (depth == 0 && path->p_ext == NULL)  in ext4_ext_search_left()
1492 	ex = path[depth].p_ext;  in ext4_ext_search_left()
1495 		if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) {  in ext4_ext_search_left()
1501 		while (--depth >= 0) {  in ext4_ext_search_left()
1502 			ix = path[depth].p_idx;  in ext4_ext_search_left()
1503 			if (unlikely(ix != EXT_FIRST_INDEX(path[depth].p_hdr))) {  in ext4_ext_search_left()
1507 				  le32_to_cpu(EXT_FIRST_INDEX(path[depth].p_hdr)->ei_block),  in ext4_ext_search_left()
1508 				  depth);  in ext4_ext_search_left()
1543 	int depth;	/* Note, NOT eh_depth; depth from top of tree */  in ext4_ext_search_right()  local
1550 	depth = path->p_depth;  in ext4_ext_search_right()
1553 	if (depth == 0 && path->p_ext == NULL)  in ext4_ext_search_right()
1560 	ex = path[depth].p_ext;  in ext4_ext_search_right()
1563 		if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) {  in ext4_ext_search_right()
1566 					 depth);  in ext4_ext_search_right()
1569 		while (--depth >= 0) {  in ext4_ext_search_right()
1570 			ix = path[depth].p_idx;  in ext4_ext_search_right()
1571 			if (unlikely(ix != EXT_FIRST_INDEX(path[depth].p_hdr))) {  in ext4_ext_search_right()
1588 	if (ex != EXT_LAST_EXTENT(path[depth].p_hdr)) {  in ext4_ext_search_right()
1595 	while (--depth >= 0) {  in ext4_ext_search_right()
1596 		ix = path[depth].p_idx;  in ext4_ext_search_right()
1597 		if (ix != EXT_LAST_INDEX(path[depth].p_hdr))  in ext4_ext_search_right()
1609 	while (++depth < path->p_depth) {  in ext4_ext_search_right()
1611 		bh = read_extent_tree_block(inode, ix, path->p_depth - depth, 0);  in ext4_ext_search_right()
1619 	bh = read_extent_tree_block(inode, ix, path->p_depth - depth, 0);  in ext4_ext_search_right()
1644 	int depth;  in ext4_ext_next_allocated_block()  local
1647 	depth = path->p_depth;  in ext4_ext_next_allocated_block()
1649 	if (depth == 0 && path->p_ext == NULL)  in ext4_ext_next_allocated_block()
1652 	while (depth >= 0) {  in ext4_ext_next_allocated_block()
1653 		struct ext4_ext_path *p = &path[depth];  in ext4_ext_next_allocated_block()
1655 		if (depth == path->p_depth) {  in ext4_ext_next_allocated_block()
1664 		depth--;  in ext4_ext_next_allocated_block()
1676 	int depth;  in ext4_ext_next_leaf_block()  local
1679 	depth = path->p_depth;  in ext4_ext_next_leaf_block()
1682 	if (depth == 0)  in ext4_ext_next_leaf_block()
1686 	depth--;  in ext4_ext_next_leaf_block()
1688 	while (depth >= 0) {  in ext4_ext_next_leaf_block()
1689 		if (path[depth].p_idx !=  in ext4_ext_next_leaf_block()
1690 				EXT_LAST_INDEX(path[depth].p_hdr))  in ext4_ext_next_leaf_block()
1692 				le32_to_cpu(path[depth].p_idx[1].ei_block);  in ext4_ext_next_leaf_block()
1693 		depth--;  in ext4_ext_next_leaf_block()
1709 	int depth = ext_depth(inode);  in ext4_ext_correct_indexes()  local
1714 	eh = path[depth].p_hdr;  in ext4_ext_correct_indexes()
1715 	ex = path[depth].p_ext;  in ext4_ext_correct_indexes()
1723 	if (depth == 0) {  in ext4_ext_correct_indexes()
1736 	k = depth - 1;  in ext4_ext_correct_indexes()
1737 	border = path[depth].p_ext->ee_block;  in ext4_ext_correct_indexes()
1806 	unsigned int depth, len;  in ext4_ext_try_to_merge_right()  local
1809 	depth = ext_depth(inode);  in ext4_ext_try_to_merge_right()
1810 	BUG_ON(path[depth].p_hdr == NULL);  in ext4_ext_try_to_merge_right()
1811 	eh = path[depth].p_hdr;  in ext4_ext_try_to_merge_right()
1894 	unsigned int depth;  in ext4_ext_try_to_merge()  local
1897 	depth = ext_depth(inode);  in ext4_ext_try_to_merge()
1898 	BUG_ON(path[depth].p_hdr == NULL);  in ext4_ext_try_to_merge()
1899 	eh = path[depth].p_hdr;  in ext4_ext_try_to_merge()
1924 	unsigned int depth, len1;  in ext4_ext_check_overlap()  local
1929 	depth = ext_depth(inode);  in ext4_ext_check_overlap()
1930 	if (!path[depth].p_ext)  in ext4_ext_check_overlap()
1932 	b2 = EXT4_LBLK_CMASK(sbi, le32_to_cpu(path[depth].p_ext->ee_block));  in ext4_ext_check_overlap()
1976 	int depth, len, err;  in ext4_ext_insert_extent()  local
1986 	depth = ext_depth(inode);  in ext4_ext_insert_extent()
1987 	ex = path[depth].p_ext;  in ext4_ext_insert_extent()
1988 	eh = path[depth].p_hdr;  in ext4_ext_insert_extent()
1989 	if (unlikely(path[depth].p_hdr == NULL)) {  in ext4_ext_insert_extent()
1990 		EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth);  in ext4_ext_insert_extent()
2027 						  path + depth);  in ext4_ext_insert_extent()
2052 						  path + depth);  in ext4_ext_insert_extent()
2068 	depth = ext_depth(inode);  in ext4_ext_insert_extent()
2069 	eh = path[depth].p_hdr;  in ext4_ext_insert_extent()
2085 		eh = npath[depth].p_hdr;  in ext4_ext_insert_extent()
2106 	depth = ext_depth(inode);  in ext4_ext_insert_extent()
2107 	eh = path[depth].p_hdr;  in ext4_ext_insert_extent()
2110 	nearex = path[depth].p_ext;  in ext4_ext_insert_extent()
2112 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_insert_extent()
2162 	path[depth].p_ext = nearex;  in ext4_ext_insert_extent()
2248 	int depth = ext_depth(inode);  in ext4_ext_find_hole()  local
2252 	ex = path[depth].p_ext;  in ext4_ext_find_hole()
2278 			struct ext4_ext_path *path, int depth)  in ext4_ext_rm_idx()  argument
2284 	depth--;  in ext4_ext_rm_idx()
2285 	path = path + depth;  in ext4_ext_rm_idx()
2311 	while (--depth >= 0) {  in ext4_ext_rm_idx()
2337 		int depth = ext_depth(inode);  in ext4_ext_calc_credits_for_single_extent()  local
2341 		if (le16_to_cpu(path[depth].p_hdr->eh_entries)  in ext4_ext_calc_credits_for_single_extent()
2342 				< le16_to_cpu(path[depth].p_hdr->eh_max)) {  in ext4_ext_calc_credits_for_single_extent()
2373 	int depth;  in ext4_ext_index_trans_blocks()  local
2379 	depth = ext_depth(inode);  in ext4_ext_index_trans_blocks()
2382 		index = depth * 2;  in ext4_ext_index_trans_blocks()
2384 		index = depth * 3;  in ext4_ext_index_trans_blocks()
2573 	int depth = ext_depth(inode), credits, revoke_credits;  in ext4_ext_rm_leaf()  local
2585 	if (!path[depth].p_hdr)  in ext4_ext_rm_leaf()
2586 		path[depth].p_hdr = ext_block_hdr(path[depth].p_bh);  in ext4_ext_rm_leaf()
2587 	eh = path[depth].p_hdr;  in ext4_ext_rm_leaf()
2588 	if (unlikely(path[depth].p_hdr == NULL)) {  in ext4_ext_rm_leaf()
2589 		EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth);  in ext4_ext_rm_leaf()
2593 	ex = path[depth].p_ext;  in ext4_ext_rm_leaf()
2612 		path[depth].p_ext = ex;  in ext4_ext_rm_leaf()
2682 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_rm_leaf()
2722 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_rm_leaf()
2761 	if (err == 0 && eh->eh_entries == 0 && path[depth].p_bh != NULL)  in ext4_ext_rm_leaf()
2762 		err = ext4_ext_rm_idx(handle, inode, path, depth);  in ext4_ext_rm_leaf()
2793 	int depth = ext_depth(inode);  in ext4_ext_remove_space()  local
2807 			depth + 1,  in ext4_ext_remove_space()
2808 			ext4_free_metadata_revoke_credits(inode->i_sb, depth));  in ext4_ext_remove_space()
2813 	trace_ext4_ext_remove_space(inode, start, end, depth);  in ext4_ext_remove_space()
2834 		depth = ext_depth(inode);  in ext4_ext_remove_space()
2836 		ex = path[depth].p_ext;  in ext4_ext_remove_space()
2838 			if (depth) {  in ext4_ext_remove_space()
2841 						 depth);  in ext4_ext_remove_space()
2907 	depth = ext_depth(inode);  in ext4_ext_remove_space()
2909 		int k = i = depth;  in ext4_ext_remove_space()
2914 		path = kcalloc(depth + 1, sizeof(struct ext4_ext_path),  in ext4_ext_remove_space()
2920 		path[0].p_maxdepth = path[0].p_depth = depth;  in ext4_ext_remove_space()
2924 		if (ext4_ext_check(inode, path[0].p_hdr, depth, 0)) {  in ext4_ext_remove_space()
2932 		if (i == depth) {  in ext4_ext_remove_space()
2971 						    depth - i - 1,  in ext4_ext_remove_space()
2981 			if (WARN_ON(i + 1 > depth)) {  in ext4_ext_remove_space()
3007 	trace_ext4_ext_remove_space_done(inode, start, end, depth, &partial,  in ext4_ext_remove_space()
3164 	unsigned int ee_len, depth;  in ext4_split_extent_at()  local
3174 	depth = ext_depth(inode);  in ext4_split_extent_at()
3175 	ex = path[depth].p_ext;  in ext4_split_extent_at()
3186 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_split_extent_at()
3218 	err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_split_extent_at()
3310 	unsigned int ee_len, depth;  in ext4_split_extent()  local
3316 	depth = ext_depth(inode);  in ext4_split_extent()
3317 	ex = path[depth].p_ext;  in ext4_split_extent()
3344 	depth = ext_depth(inode);  in ext4_split_extent()
3345 	ex = path[depth].p_ext;  in ext4_split_extent()
3404 	unsigned int ee_len, depth, map_len = map->m_len;  in ext4_ext_convert_to_initialized()  local
3418 	depth = ext_depth(inode);  in ext4_ext_convert_to_initialized()
3419 	eh = path[depth].p_hdr;  in ext4_ext_convert_to_initialized()
3420 	ex = path[depth].p_ext;  in ext4_ext_convert_to_initialized()
3474 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3520 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3542 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3545 		path[depth].p_ext = abut_ex;  in ext4_ext_convert_to_initialized()
3660 	int split_flag = 0, depth;  in ext4_split_convert_extents()  local
3673 	depth = ext_depth(inode);  in ext4_split_convert_extents()
3674 	ex = path[depth].p_ext;  in ext4_split_convert_extents()
3700 	int depth;  in ext4_convert_unwritten_extents_endio()  local
3703 	depth = ext_depth(inode);  in ext4_convert_unwritten_extents_endio()
3704 	ex = path[depth].p_ext;  in ext4_convert_unwritten_extents_endio()
3731 		depth = ext_depth(inode);  in ext4_convert_unwritten_extents_endio()
3732 		ex = path[depth].p_ext;  in ext4_convert_unwritten_extents_endio()
3735 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_convert_unwritten_extents_endio()
3763 	int depth;  in convert_initialized_extent()  local
3773 	depth = ext_depth(inode);  in convert_initialized_extent()
3774 	ex = path[depth].p_ext;  in convert_initialized_extent()
3789 		depth = ext_depth(inode);  in convert_initialized_extent()
3790 		ex = path[depth].p_ext;  in convert_initialized_extent()
3798 	err = ext4_ext_get_access(handle, inode, path + depth);  in convert_initialized_extent()
4130 	int err = 0, depth, ret;  in ext4_ext_map_blocks()  local
4147 	depth = ext_depth(inode);  in ext4_ext_map_blocks()
4154 	if (unlikely(path[depth].p_ext == NULL && depth != 0)) {  in ext4_ext_map_blocks()
4157 				 (unsigned long) map->m_lblk, depth,  in ext4_ext_map_blocks()
4158 				 path[depth].p_block);  in ext4_ext_map_blocks()
4163 	ex = path[depth].p_ext;  in ext4_ext_map_blocks()
4453 	int depth = 0;  in ext4_alloc_file_blocks()  local
4473 	depth = ext_depth(inode);  in ext4_alloc_file_blocks()
4480 		if (depth != ext_depth(inode)) {  in ext4_alloc_file_blocks()
4482 			depth = ext_depth(inode);  in ext4_alloc_file_blocks()
5059 	int depth, err = 0;  in ext4_ext_shift_path_extents()  local
5063 	depth = path->p_depth;  in ext4_ext_shift_path_extents()
5065 	while (depth >= 0) {  in ext4_ext_shift_path_extents()
5066 		if (depth == path->p_depth) {  in ext4_ext_shift_path_extents()
5067 			ex_start = path[depth].p_ext;  in ext4_ext_shift_path_extents()
5071 			ex_last = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_path_extents()
5074 			if (ex_start == EXT_FIRST_EXTENT(path[depth].p_hdr)) {  in ext4_ext_shift_path_extents()
5077 				credits = depth + 2;  in ext4_ext_shift_path_extents()
5089 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5099 					    EXT_FIRST_EXTENT(path[depth].p_hdr))  in ext4_ext_shift_path_extents()
5113 			err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5117 			if (--depth < 0 || !update)  in ext4_ext_shift_path_extents()
5122 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5127 			le32_add_cpu(&path[depth].p_idx->ei_block, -shift);  in ext4_ext_shift_path_extents()
5129 			le32_add_cpu(&path[depth].p_idx->ei_block, shift);  in ext4_ext_shift_path_extents()
5130 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5135 		if (path[depth].p_idx != EXT_FIRST_INDEX(path[depth].p_hdr))  in ext4_ext_shift_path_extents()
5138 		depth--;  in ext4_ext_shift_path_extents()
5158 	int ret = 0, depth;  in ext4_ext_shift_extents()  local
5169 	depth = path->p_depth;  in ext4_ext_shift_extents()
5170 	extent = path[depth].p_ext;  in ext4_ext_shift_extents()
5186 		depth = path->p_depth;  in ext4_ext_shift_extents()
5187 		extent =  path[depth].p_ext;  in ext4_ext_shift_extents()
5235 		depth = path->p_depth;  in ext4_ext_shift_extents()
5236 		extent = path[depth].p_ext;  in ext4_ext_shift_extents()
5245 			if (extent < EXT_LAST_EXTENT(path[depth].p_hdr)) {  in ext4_ext_shift_extents()
5246 				path[depth].p_ext++;  in ext4_ext_shift_extents()
5255 			extent = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5259 			extent = EXT_FIRST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5265 				extent = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5269 				if (extent == EXT_LAST_EXTENT(path[depth].p_hdr))  in ext4_ext_shift_extents()
5275 			path[depth].p_ext = extent;  in ext4_ext_shift_extents()
5443 	int ret = 0, depth, split_flag = 0;  in ext4_insert_range()  local
5536 	depth = ext_depth(inode);  in ext4_insert_range()
5537 	extent = path[depth].p_ext;  in ext4_insert_range()
5797 	int depth, mapped = 0, err = 0;  in ext4_clu_mapped()  local
5818 	depth = ext_depth(inode);  in ext4_clu_mapped()
5825 	if (unlikely(path[depth].p_ext == NULL && depth != 0)) {  in ext4_clu_mapped()
5829 				 depth, path[depth].p_block);  in ext4_clu_mapped()
5834 	extent = path[depth].p_ext;  in ext4_clu_mapped()