1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
15  *   - ext4*_error() should be used in some situations
16  *   - analyze all BUG()/BUG_ON(), use -EIO where appropriate
17  *   - smart tree reduction
53 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_extent_block_csum()
56 	csum = ext4_chksum(sbi, ei->i_csum_seed, (__u8 *)eh,  in ext4_extent_block_csum()
66 	if (!ext4_has_metadata_csum(inode->i_sb))  in ext4_extent_block_csum_verify()
70 	if (et->et_checksum != ext4_extent_block_csum(inode, eh))  in ext4_extent_block_csum_verify()
80 	if (!ext4_has_metadata_csum(inode->i_sb))  in ext4_extent_block_csum_set()
84 	et->et_checksum = ext4_extent_block_csum(inode, eh);  in ext4_extent_block_csum_set()
104 	up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_trunc_restart_fn()
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()
117 		brelse(path->p_bh);  in ext4_ext_drop_refs()
118 		path->p_bh = NULL;  in ext4_ext_drop_refs()
146 		down_write(&EXT4_I(inode)->i_data_sem);  in ext4_datasem_ensure_credits()
152  *  - EROFS
153  *  - ENOMEM
160 	if (path->p_bh) {  in ext4_ext_get_access()
162 		BUFFER_TRACE(path->p_bh, "get_write_access");  in ext4_ext_get_access()
163 		err = ext4_journal_get_write_access(handle, inode->i_sb,  in ext4_ext_get_access()
164 						    path->p_bh, EXT4_JTR_NONE);  in ext4_ext_get_access()
172 			clear_buffer_verified(path->p_bh);  in ext4_ext_get_access()
175 	/* we use in-core data, no need to protect them */  in ext4_ext_get_access()
181  *  - EROFS
182  *  - ENOMEM
183  *  - EIO
191 	WARN_ON(!rwsem_is_locked(&EXT4_I(inode)->i_data_sem));  in __ext4_ext_dirty()
192 	if (path->p_bh) {  in __ext4_ext_dirty()
193 		ext4_extent_block_csum_set(inode, ext_block_hdr(path->p_bh));  in __ext4_ext_dirty()
196 						   inode, path->p_bh);  in __ext4_ext_dirty()
197 		/* Extents updating done, re-set verified flag */  in __ext4_ext_dirty()
199 			set_buffer_verified(path->p_bh);  in __ext4_ext_dirty()
215 		int depth = path->p_depth;  in ext4_ext_find_goal()  local
221 		 * non-sparse --- i.e., in the case of libbfd writing  in ext4_ext_find_goal()
222 		 * an ELF object sections out-of-order but in a way  in ext4_ext_find_goal()
226 		 * non-ideal if we are writing a sparse file such as  in ext4_ext_find_goal()
235 		ex = path[depth].p_ext;  in ext4_ext_find_goal()
238 			ext4_lblk_t ext_block = le32_to_cpu(ex->ee_block);  in ext4_ext_find_goal()
241 				return ext_pblk + (block - ext_block);  in ext4_ext_find_goal()
243 				return ext_pblk - (ext_block - block);  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()
266 	goal = ext4_ext_find_goal(inode, path, le32_to_cpu(ex->ee_block));  in ext4_ext_new_meta_block()
276 	size = (inode->i_sb->s_blocksize - sizeof(struct ext4_extent_header))  in ext4_ext_space_block()
289 	size = (inode->i_sb->s_blocksize - sizeof(struct ext4_extent_header))  in ext4_ext_space_block_idx()
302 	size = sizeof(EXT4_I(inode)->i_data);  in ext4_ext_space_root()
303 	size -= sizeof(struct ext4_extent_header);  in ext4_ext_space_root()
316 	size = sizeof(EXT4_I(inode)->i_data);  in ext4_ext_space_root_idx()
317 	size -= sizeof(struct ext4_extent_header);  in ext4_ext_space_root_idx()
332 	int unwritten = ext4_ext_is_unwritten(path[path->p_depth].p_ext);  in ext4_force_split_extent_at()
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()
367 	ext4_lblk_t lblock = le32_to_cpu(ext->ee_block);  in ext4_valid_extent()
371 	 *  - zero length  in ext4_valid_extent()
372 	 *  - overflow/wrap-around  in ext4_valid_extent()
390 				     int depth)  in ext4_valid_extent_entries()  argument
396 	if (eh->eh_entries == 0)  in ext4_valid_extent_entries()
399 	entries = le16_to_cpu(eh->eh_entries);  in ext4_valid_extent_entries()
401 	if (depth == 0) {  in ext4_valid_extent_entries()
409 		if (depth != ext_depth(inode) &&  in ext4_valid_extent_entries()
410 		    lblk != le32_to_cpu(ext->ee_block))  in ext4_valid_extent_entries()
417 			lblock = le32_to_cpu(ext->ee_block);  in ext4_valid_extent_entries()
424 			entries--;  in ext4_valid_extent_entries()
433 		if (depth != ext_depth(inode) &&  in ext4_valid_extent_entries()
434 		    lblk != le32_to_cpu(ext_idx->ei_block))  in ext4_valid_extent_entries()
441 			lblock = le32_to_cpu(ext_idx->ei_block);  in ext4_valid_extent_entries()
447 			entries--;  in ext4_valid_extent_entries()
456 			    int depth, ext4_fsblk_t pblk, ext4_lblk_t lblk)  in __ext4_ext_check()  argument
459 	int max = 0, err = -EFSCORRUPTED;  in __ext4_ext_check()
461 	if (unlikely(eh->eh_magic != EXT4_EXT_MAGIC)) {  in __ext4_ext_check()
465 	if (unlikely(le16_to_cpu(eh->eh_depth) != depth)) {  in __ext4_ext_check()
469 	if (unlikely(eh->eh_max == 0)) {  in __ext4_ext_check()
473 	max = ext4_ext_max_entries(inode, depth);  in __ext4_ext_check()
474 	if (unlikely(le16_to_cpu(eh->eh_max) > max)) {  in __ext4_ext_check()
478 	if (unlikely(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max))) {  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()
494 	/* Verify checksum on non-root extent tree nodes */  in __ext4_ext_check()
495 	if (ext_depth(inode) != depth &&  in __ext4_ext_check()
498 		err = -EFSBADCRC;  in __ext4_ext_check()
504 	ext4_error_inode_err(inode, function, line, 0, -err,  in __ext4_ext_check()
505 			     "pblk %llu bad header/extent: %s - magic %x, "  in __ext4_ext_check()
506 			     "entries %u, max %u(%u), depth %u(%u)",  in __ext4_ext_check()
508 			     le16_to_cpu(eh->eh_magic),  in __ext4_ext_check()
509 			     le16_to_cpu(eh->eh_entries),  in __ext4_ext_check()
510 			     le16_to_cpu(eh->eh_max),  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)
530 	for (i = le16_to_cpu(eh->eh_entries); i > 0; i--, ex++) {  in ext4_cache_extents()
532 		ext4_lblk_t lblk = le32_to_cpu(ex->ee_block);  in ext4_cache_extents()
536 			ext4_es_cache_extent(inode, prev, lblk - prev, ~0,  in ext4_cache_extents()
550 			 int depth, int flags)  in __read_extent_tree_block()  argument
561 	bh = sb_getblk_gfp(inode->i_sb, pblk, gfp_flags);  in __read_extent_tree_block()
563 		return ERR_PTR(-ENOMEM);  in __read_extent_tree_block()
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
608 		return 0;	/* not an extent-mapped inode */  in ext4_ext_precache()
610 	down_read(&ei->i_data_sem);  in ext4_ext_precache()
611 	depth = ext_depth(inode);  in ext4_ext_precache()
614 	if (!depth) {  in ext4_ext_precache()
615 		up_read(&ei->i_data_sem);  in ext4_ext_precache()
619 	path = kcalloc(depth + 1, sizeof(struct ext4_ext_path),  in ext4_ext_precache()
622 		up_read(&ei->i_data_sem);  in ext4_ext_precache()
623 		return -ENOMEM;  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()
640 			i--;  in ext4_ext_precache()
644 					    depth - i - 1,  in ext4_ext_precache()
657 	up_read(&ei->i_data_sem);  in ext4_ext_precache()
665 	int k, l = path->p_depth;  in ext4_ext_show_path()
669 		if (path->p_idx) {  in ext4_ext_show_path()
670 			ext_debug(inode, "  %d->%llu",  in ext4_ext_show_path()
671 				  le32_to_cpu(path->p_idx->ei_block),  in ext4_ext_show_path()
672 				  ext4_idx_pblock(path->p_idx));  in ext4_ext_show_path()
673 		} else if (path->p_ext) {  in ext4_ext_show_path()
675 				  le32_to_cpu(path->p_ext->ee_block),  in ext4_ext_show_path()
676 				  ext4_ext_is_unwritten(path->p_ext),  in ext4_ext_show_path()
677 				  ext4_ext_get_actual_len(path->p_ext),  in ext4_ext_show_path()
678 				  ext4_ext_pblock(path->p_ext));  in ext4_ext_show_path()
687 	int depth = ext_depth(inode);  in ext4_ext_show_leaf()  local
695 	eh = path[depth].p_hdr;  in ext4_ext_show_leaf()
700 	for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ex++) {  in ext4_ext_show_leaf()
701 		ext_debug(inode, "%d:[%d]%d:%llu ", le32_to_cpu(ex->ee_block),  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()
719 				  level, le32_to_cpu(idx->ei_block),  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()
730 				le32_to_cpu(ex->ee_block),  in ext4_ext_show_move()
754 	struct ext4_extent_header *eh = path->p_hdr;  in ext4_ext_binsearch_idx()
763 		m = l + (r - l) / 2;  in ext4_ext_binsearch_idx()
765 			  le32_to_cpu(l->ei_block), m, le32_to_cpu(m->ei_block),  in ext4_ext_binsearch_idx()
766 			  r, le32_to_cpu(r->ei_block));  in ext4_ext_binsearch_idx()
768 		if (block < le32_to_cpu(m->ei_block))  in ext4_ext_binsearch_idx()
769 			r = m - 1;  in ext4_ext_binsearch_idx()
774 	path->p_idx = l - 1;  in ext4_ext_binsearch_idx()
775 	ext_debug(inode, "  -> %u->%lld ", le32_to_cpu(path->p_idx->ei_block),  in ext4_ext_binsearch_idx()
776 		  ext4_idx_pblock(path->p_idx));  in ext4_ext_binsearch_idx()
784 		for (k = 0; k < le16_to_cpu(eh->eh_entries); k++, ix++) {  in ext4_ext_binsearch_idx()
785 			if (k != 0 && le32_to_cpu(ix->ei_block) <=  in ext4_ext_binsearch_idx()
786 			    le32_to_cpu(ix[-1].ei_block)) {  in ext4_ext_binsearch_idx()
791 				       le32_to_cpu(ix->ei_block),  in ext4_ext_binsearch_idx()
792 				       le32_to_cpu(ix[-1].ei_block));  in ext4_ext_binsearch_idx()
794 			BUG_ON(k && le32_to_cpu(ix->ei_block)  in ext4_ext_binsearch_idx()
795 					   <= le32_to_cpu(ix[-1].ei_block));  in ext4_ext_binsearch_idx()
796 			if (block < le32_to_cpu(ix->ei_block))  in ext4_ext_binsearch_idx()
800 		BUG_ON(chix != path->p_idx);  in ext4_ext_binsearch_idx()
815 	struct ext4_extent_header *eh = path->p_hdr;  in ext4_ext_binsearch()
818 	if (eh->eh_entries == 0) {  in ext4_ext_binsearch()
832 		m = l + (r - l) / 2;  in ext4_ext_binsearch()
834 			  le32_to_cpu(l->ee_block), m, le32_to_cpu(m->ee_block),  in ext4_ext_binsearch()
835 			  r, le32_to_cpu(r->ee_block));  in ext4_ext_binsearch()
837 		if (block < le32_to_cpu(m->ee_block))  in ext4_ext_binsearch()
838 			r = m - 1;  in ext4_ext_binsearch()
843 	path->p_ext = l - 1;  in ext4_ext_binsearch()
844 	ext_debug(inode, "  -> %d:%llu:[%d]%d ",  in ext4_ext_binsearch()
845 			le32_to_cpu(path->p_ext->ee_block),  in ext4_ext_binsearch()
846 			ext4_ext_pblock(path->p_ext),  in ext4_ext_binsearch()
847 			ext4_ext_is_unwritten(path->p_ext),  in ext4_ext_binsearch()
848 			ext4_ext_get_actual_len(path->p_ext));  in ext4_ext_binsearch()
856 		for (k = 0; k < le16_to_cpu(eh->eh_entries); k++, ex++) {  in ext4_ext_binsearch()
857 			BUG_ON(k && le32_to_cpu(ex->ee_block)  in ext4_ext_binsearch()
858 					  <= le32_to_cpu(ex[-1].ee_block));  in ext4_ext_binsearch()
859 			if (block < le32_to_cpu(ex->ee_block))  in ext4_ext_binsearch()
863 		BUG_ON(chex != path->p_ext);  in ext4_ext_binsearch()
874 	eh->eh_depth = 0;  in ext4_ext_tree_init()
875 	eh->eh_entries = 0;  in ext4_ext_tree_init()
876 	eh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_tree_init()
877 	eh->eh_max = cpu_to_le16(ext4_ext_space_root(inode, 0));  in ext4_ext_tree_init()
878 	eh->eh_generation = 0;  in ext4_ext_tree_init()
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()
899 		EXT4_ERROR_INODE(inode, "inode has invalid extent depth: %d",  in ext4_find_extent()
900 				 depth);  in ext4_find_extent()
901 		ret = -EFSCORRUPTED;  in ext4_find_extent()
907 		if (depth > path[0].p_maxdepth) {  in ext4_find_extent()
913 		/* account possible depth increase */  in ext4_find_extent()
914 		path = kcalloc(depth + 2, sizeof(struct ext4_ext_path),  in ext4_find_extent()
917 			return ERR_PTR(-ENOMEM);  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()
928 		ext_debug(inode, "depth %d: num %d, max %d\n",  in ext4_find_extent()
929 			  ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));  in ext4_find_extent()
936 		bh = read_extent_tree_block(inode, path[ppos].p_idx, --i, flags);  in ext4_find_extent()
987 	if (unlikely(logical == le32_to_cpu(curp->p_idx->ei_block))) {  in ext4_ext_insert_index()
990 				 logical, le32_to_cpu(curp->p_idx->ei_block));  in ext4_ext_insert_index()
991 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
994 	if (unlikely(le16_to_cpu(curp->p_hdr->eh_entries)  in ext4_ext_insert_index()
995 			     >= le16_to_cpu(curp->p_hdr->eh_max))) {  in ext4_ext_insert_index()
998 				 le16_to_cpu(curp->p_hdr->eh_entries),  in ext4_ext_insert_index()
999 				 le16_to_cpu(curp->p_hdr->eh_max));  in ext4_ext_insert_index()
1000 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
1003 	if (logical > le32_to_cpu(curp->p_idx->ei_block)) {  in ext4_ext_insert_index()
1007 		ix = curp->p_idx + 1;  in ext4_ext_insert_index()
1012 		ix = curp->p_idx;  in ext4_ext_insert_index()
1015 	if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) {  in ext4_ext_insert_index()
1017 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
1020 	len = EXT_LAST_INDEX(curp->p_hdr) - ix + 1;  in ext4_ext_insert_index()
1029 	ix->ei_block = cpu_to_le32(logical);  in ext4_ext_insert_index()
1031 	le16_add_cpu(&curp->p_hdr->eh_entries, 1);  in ext4_ext_insert_index()
1033 	if (unlikely(ix > EXT_LAST_INDEX(curp->p_hdr))) {  in ext4_ext_insert_index()
1035 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
1039 	ext4_std_error(inode->i_sb, err);  in ext4_ext_insert_index()
1047  * at depth @at:
1048  * - allocates all needed blocks (new leaf and all intermediate index blocks)
1049  * - makes decision where to split
1050  * - moves remaining extents and index entries (right to the split point)
1052  * - initializes subtree
1060 	int depth = ext_depth(inode);  in ext4_ext_split()  local
1079 	if (unlikely(path[depth].p_ext > EXT_MAX_EXTENT(path[depth].p_hdr))) {  in ext4_ext_split()
1081 		return -EFSCORRUPTED;  in ext4_ext_split()
1083 	if (path[depth].p_ext != EXT_MAX_EXTENT(path[depth].p_hdr)) {  in ext4_ext_split()
1084 		border = path[depth].p_ext[1].ee_block;  in ext4_ext_split()
1089 		border = newext->ee_block;  in ext4_ext_split()
1097 	 * and mark filesystem read-only. index won't  in ext4_ext_split()
1107 	ablocks = kcalloc(depth, sizeof(ext4_fsblk_t), gfp_flags);  in ext4_ext_split()
1109 		return -ENOMEM;  in ext4_ext_split()
1112 	ext_debug(inode, "allocate %d blocks for indexes/leaf\n", depth - at);  in ext4_ext_split()
1113 	for (a = 0; a < depth - at; a++) {  in ext4_ext_split()
1122 	newblock = ablocks[--a];  in ext4_ext_split()
1125 		err = -EFSCORRUPTED;  in ext4_ext_split()
1128 	bh = sb_getblk_gfp(inode->i_sb, newblock, __GFP_MOVABLE | GFP_NOFS);  in ext4_ext_split()
1130 		err = -ENOMEM;  in ext4_ext_split()
1135 	err = ext4_journal_get_create_access(handle, inode->i_sb, bh,  in ext4_ext_split()
1141 	neh->eh_entries = 0;  in ext4_ext_split()
1142 	neh->eh_max = cpu_to_le16(ext4_ext_space_block(inode, 0));  in ext4_ext_split()
1143 	neh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_split()
1144 	neh->eh_depth = 0;  in ext4_ext_split()
1145 	neh->eh_generation = 0;  in ext4_ext_split()
1147 	/* move remainder of path[depth] to the new leaf */  in ext4_ext_split()
1148 	if (unlikely(path[depth].p_hdr->eh_entries !=  in ext4_ext_split()
1149 		     path[depth].p_hdr->eh_max)) {  in ext4_ext_split()
1151 				 path[depth].p_hdr->eh_entries,  in ext4_ext_split()
1152 				 path[depth].p_hdr->eh_max);  in ext4_ext_split()
1153 		err = -EFSCORRUPTED;  in ext4_ext_split()
1157 	m = EXT_MAX_EXTENT(path[depth].p_hdr) - path[depth].p_ext++;  in ext4_ext_split()
1158 	ext4_ext_show_move(inode, path, newblock, depth);  in ext4_ext_split()
1162 		memmove(ex, path[depth].p_ext, sizeof(struct ext4_extent) * m);  in ext4_ext_split()
1163 		le16_add_cpu(&neh->eh_entries, m);  in ext4_ext_split()
1168 		sizeof(struct ext4_extent) * le16_to_cpu(neh->eh_entries);  in ext4_ext_split()
1169 	memset(bh->b_data + ext_size, 0, inode->i_sb->s_blocksize - ext_size);  in ext4_ext_split()
1182 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_split()
1185 		le16_add_cpu(&path[depth].p_hdr->eh_entries, -m);  in ext4_ext_split()
1186 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_split()
1193 	k = depth - at - 1;  in ext4_ext_split()
1196 		err = -EFSCORRUPTED;  in ext4_ext_split()
1202 	/* current depth stored in i var */  in ext4_ext_split()
1203 	i = depth - 1;  in ext4_ext_split()
1204 	while (k--) {  in ext4_ext_split()
1206 		newblock = ablocks[--a];  in ext4_ext_split()
1207 		bh = sb_getblk(inode->i_sb, newblock);  in ext4_ext_split()
1209 			err = -ENOMEM;  in ext4_ext_split()
1214 		err = ext4_journal_get_create_access(handle, inode->i_sb, bh,  in ext4_ext_split()
1220 		neh->eh_entries = cpu_to_le16(1);  in ext4_ext_split()
1221 		neh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_split()
1222 		neh->eh_max = cpu_to_le16(ext4_ext_space_block_idx(inode, 0));  in ext4_ext_split()
1223 		neh->eh_depth = cpu_to_le16(depth - i);  in ext4_ext_split()
1224 		neh->eh_generation = 0;  in ext4_ext_split()
1226 		fidx->ei_block = border;  in ext4_ext_split()
1229 		ext_debug(inode, "int.index at %d (block %llu): %u -> %llu\n",  in ext4_ext_split()
1237 					 le32_to_cpu(path[i].p_ext->ee_block));  in ext4_ext_split()
1238 			err = -EFSCORRUPTED;  in ext4_ext_split()
1242 		m = EXT_MAX_INDEX(path[i].p_hdr) - path[i].p_idx++;  in ext4_ext_split()
1249 			le16_add_cpu(&neh->eh_entries, m);  in ext4_ext_split()
1253 		   (sizeof(struct ext4_extent) * le16_to_cpu(neh->eh_entries));  in ext4_ext_split()
1254 		memset(bh->b_data + ext_size, 0,  in ext4_ext_split()
1255 			inode->i_sb->s_blocksize - ext_size);  in ext4_ext_split()
1271 			le16_add_cpu(&path[i].p_hdr->eh_entries, -m);  in ext4_ext_split()
1277 		i--;  in ext4_ext_split()
1293 		for (i = 0; i < depth; i++) {  in ext4_ext_split()
1308  * - allocates new block
1309  * - moves top-level data (index block or leaf) into the new block
1310  * - initializes new top-level, creating index that points to the
1319 	struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;  in ext4_ext_grow_indepth()
1326 	if (goal > le32_to_cpu(es->s_first_data_block)) {  in ext4_ext_grow_indepth()
1328 		goal--;  in ext4_ext_grow_indepth()
1336 	bh = sb_getblk_gfp(inode->i_sb, newblock, __GFP_MOVABLE | GFP_NOFS);  in ext4_ext_grow_indepth()
1338 		return -ENOMEM;  in ext4_ext_grow_indepth()
1341 	err = ext4_journal_get_create_access(handle, inode->i_sb, bh,  in ext4_ext_grow_indepth()
1348 	ext_size = sizeof(EXT4_I(inode)->i_data);  in ext4_ext_grow_indepth()
1349 	/* move top-level index/leaf into new block */  in ext4_ext_grow_indepth()
1350 	memmove(bh->b_data, EXT4_I(inode)->i_data, ext_size);  in ext4_ext_grow_indepth()
1352 	memset(bh->b_data + ext_size, 0, inode->i_sb->s_blocksize - ext_size);  in ext4_ext_grow_indepth()
1359 		neh->eh_max = cpu_to_le16(ext4_ext_space_block_idx(inode, 0));  in ext4_ext_grow_indepth()
1361 		neh->eh_max = cpu_to_le16(ext4_ext_space_block(inode, 0));  in ext4_ext_grow_indepth()
1362 	neh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_grow_indepth()
1372 	/* Update top-level index: num,max,pointer */  in ext4_ext_grow_indepth()
1374 	neh->eh_entries = cpu_to_le16(1);  in ext4_ext_grow_indepth()
1376 	if (neh->eh_depth == 0) {  in ext4_ext_grow_indepth()
1378 		neh->eh_max = cpu_to_le16(ext4_ext_space_root_idx(inode, 0));  in ext4_ext_grow_indepth()
1379 		EXT_FIRST_INDEX(neh)->ei_block =  in ext4_ext_grow_indepth()
1380 			EXT_FIRST_EXTENT(neh)->ee_block;  in ext4_ext_grow_indepth()
1383 		  le16_to_cpu(neh->eh_entries), le16_to_cpu(neh->eh_max),  in ext4_ext_grow_indepth()
1384 		  le32_to_cpu(EXT_FIRST_INDEX(neh)->ei_block),  in ext4_ext_grow_indepth()
1387 	le16_add_cpu(&neh->eh_depth, 1);  in ext4_ext_grow_indepth()
1398  * if no free index is found, then it requests in-depth growing.
1408 	int depth, i, err = 0;  in ext4_ext_create_new_leaf()  local
1411 	i = depth = ext_depth(inode);  in ext4_ext_create_new_leaf()
1414 	curp = path + depth;  in ext4_ext_create_new_leaf()
1416 		i--;  in ext4_ext_create_new_leaf()
1417 		curp--;  in ext4_ext_create_new_leaf()
1431 				    (ext4_lblk_t)le32_to_cpu(newext->ee_block),  in ext4_ext_create_new_leaf()
1436 		/* tree is full, time to grow in depth */  in ext4_ext_create_new_leaf()
1443 				   (ext4_lblk_t)le32_to_cpu(newext->ee_block),  in ext4_ext_create_new_leaf()
1451 		 * only first (depth 0 -> 1) produces free space;  in ext4_ext_create_new_leaf()
1454 		depth = ext_depth(inode);  in ext4_ext_create_new_leaf()
1455 		if (path[depth].p_hdr->eh_entries == path[depth].p_hdr->eh_max) {  in ext4_ext_create_new_leaf()
1478 	int depth, ee_len;  in ext4_ext_search_left()  local
1482 		return -EFSCORRUPTED;  in ext4_ext_search_left()
1484 	depth = path->p_depth;  in ext4_ext_search_left()
1487 	if (depth == 0 && path->p_ext == NULL)  in ext4_ext_search_left()
1494 	ex = path[depth].p_ext;  in ext4_ext_search_left()
1496 	if (*logical < le32_to_cpu(ex->ee_block)) {  in ext4_ext_search_left()
1497 		if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) {  in ext4_ext_search_left()
1500 					 *logical, le32_to_cpu(ex->ee_block));  in ext4_ext_search_left()
1501 			return -EFSCORRUPTED;  in ext4_ext_search_left()
1503 		while (--depth >= 0) {  in ext4_ext_search_left()
1504 			ix = path[depth].p_idx;  in ext4_ext_search_left()
1505 			if (unlikely(ix != EXT_FIRST_INDEX(path[depth].p_hdr))) {  in ext4_ext_search_left()
1507 				  "ix (%d) != EXT_FIRST_INDEX (%d) (depth %d)!",  in ext4_ext_search_left()
1508 				  ix != NULL ? le32_to_cpu(ix->ei_block) : 0,  in ext4_ext_search_left()
1509 				  le32_to_cpu(EXT_FIRST_INDEX(path[depth].p_hdr)->ei_block),  in ext4_ext_search_left()
1510 				  depth);  in ext4_ext_search_left()
1511 				return -EFSCORRUPTED;  in ext4_ext_search_left()
1517 	if (unlikely(*logical < (le32_to_cpu(ex->ee_block) + ee_len))) {  in ext4_ext_search_left()
1520 				 *logical, le32_to_cpu(ex->ee_block), ee_len);  in ext4_ext_search_left()
1521 		return -EFSCORRUPTED;  in ext4_ext_search_left()
1524 	*logical = le32_to_cpu(ex->ee_block) + ee_len - 1;  in ext4_ext_search_left()
1525 	*phys = ext4_ext_pblock(ex) + ee_len - 1;  in ext4_ext_search_left()
1545 	int depth;	/* Note, NOT eh_depth; depth from top of tree */  in ext4_ext_search_right()  local
1550 		return -EFSCORRUPTED;  in ext4_ext_search_right()
1552 	depth = path->p_depth;  in ext4_ext_search_right()
1555 	if (depth == 0 && path->p_ext == NULL)  in ext4_ext_search_right()
1562 	ex = path[depth].p_ext;  in ext4_ext_search_right()
1564 	if (*logical < le32_to_cpu(ex->ee_block)) {  in ext4_ext_search_right()
1565 		if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) {  in ext4_ext_search_right()
1568 					 depth);  in ext4_ext_search_right()
1569 			return -EFSCORRUPTED;  in ext4_ext_search_right()
1571 		while (--depth >= 0) {  in ext4_ext_search_right()
1572 			ix = path[depth].p_idx;  in ext4_ext_search_right()
1573 			if (unlikely(ix != EXT_FIRST_INDEX(path[depth].p_hdr))) {  in ext4_ext_search_right()
1577 				return -EFSCORRUPTED;  in ext4_ext_search_right()
1583 	if (unlikely(*logical < (le32_to_cpu(ex->ee_block) + ee_len))) {  in ext4_ext_search_right()
1586 				 *logical, le32_to_cpu(ex->ee_block), ee_len);  in ext4_ext_search_right()
1587 		return -EFSCORRUPTED;  in ext4_ext_search_right()
1590 	if (ex != EXT_LAST_EXTENT(path[depth].p_hdr)) {  in ext4_ext_search_right()
1597 	while (--depth >= 0) {  in ext4_ext_search_right()
1598 		ix = path[depth].p_idx;  in ext4_ext_search_right()
1599 		if (ix != EXT_LAST_INDEX(path[depth].p_hdr))  in ext4_ext_search_right()
1611 	while (++depth < path->p_depth) {  in ext4_ext_search_right()
1613 		bh = read_extent_tree_block(inode, ix, path->p_depth - depth, 0);  in ext4_ext_search_right()
1621 	bh = read_extent_tree_block(inode, ix, path->p_depth - depth, 0);  in ext4_ext_search_right()
1627 	*logical = le32_to_cpu(ex->ee_block);  in ext4_ext_search_right()
1646 	int depth;  in ext4_ext_next_allocated_block()  local
1649 	depth = path->p_depth;  in ext4_ext_next_allocated_block()
1651 	if (depth == 0 && path->p_ext == NULL)  in ext4_ext_next_allocated_block()
1654 	while (depth >= 0) {  in ext4_ext_next_allocated_block()
1655 		struct ext4_ext_path *p = &path[depth];  in ext4_ext_next_allocated_block()
1657 		if (depth == path->p_depth) {  in ext4_ext_next_allocated_block()
1659 			if (p->p_ext && p->p_ext != EXT_LAST_EXTENT(p->p_hdr))  in ext4_ext_next_allocated_block()
1660 				return le32_to_cpu(p->p_ext[1].ee_block);  in ext4_ext_next_allocated_block()
1663 			if (p->p_idx != EXT_LAST_INDEX(p->p_hdr))  in ext4_ext_next_allocated_block()
1664 				return le32_to_cpu(p->p_idx[1].ei_block);  in ext4_ext_next_allocated_block()
1666 		depth--;  in ext4_ext_next_allocated_block()
1678 	int depth;  in ext4_ext_next_leaf_block()  local
1681 	depth = path->p_depth;  in ext4_ext_next_leaf_block()
1683 	/* zero-tree has no leaf blocks at all */  in ext4_ext_next_leaf_block()
1684 	if (depth == 0)  in ext4_ext_next_leaf_block()
1688 	depth--;  in ext4_ext_next_leaf_block()
1690 	while (depth >= 0) {  in ext4_ext_next_leaf_block()
1691 		if (path[depth].p_idx !=  in ext4_ext_next_leaf_block()
1692 				EXT_LAST_INDEX(path[depth].p_hdr))  in ext4_ext_next_leaf_block()
1694 				le32_to_cpu(path[depth].p_idx[1].ei_block);  in ext4_ext_next_leaf_block()
1695 		depth--;  in ext4_ext_next_leaf_block()
1711 	int depth = ext_depth(inode);  in ext4_ext_correct_indexes()  local
1716 	eh = path[depth].p_hdr;  in ext4_ext_correct_indexes()
1717 	ex = path[depth].p_ext;  in ext4_ext_correct_indexes()
1722 		return -EFSCORRUPTED;  in ext4_ext_correct_indexes()
1725 	if (depth == 0) {  in ext4_ext_correct_indexes()
1738 	k = depth - 1;  in ext4_ext_correct_indexes()
1739 	border = path[depth].p_ext->ee_block;  in ext4_ext_correct_indexes()
1743 	path[k].p_idx->ei_block = border;  in ext4_ext_correct_indexes()
1748 	while (k--) {  in ext4_ext_correct_indexes()
1749 		/* change all left-side indexes */  in ext4_ext_correct_indexes()
1755 		path[k].p_idx->ei_block = border;  in ext4_ext_correct_indexes()
1776 	if (le32_to_cpu(ex1->ee_block) + ext1_ee_len !=  in ext4_can_extents_be_merged()
1777 			le32_to_cpu(ex2->ee_block))  in ext4_can_extents_be_merged()
1799  * left, pass "ex - 1" as argument instead of "ex".
1808 	unsigned int depth, len;  in ext4_ext_try_to_merge_right()  local
1811 	depth = ext_depth(inode);  in ext4_ext_try_to_merge_right()
1812 	BUG_ON(path[depth].p_hdr == NULL);  in ext4_ext_try_to_merge_right()
1813 	eh = path[depth].p_hdr;  in ext4_ext_try_to_merge_right()
1820 		ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)  in ext4_ext_try_to_merge_right()
1826 			len = (EXT_LAST_EXTENT(eh) - ex - 1)  in ext4_ext_try_to_merge_right()
1830 		le16_add_cpu(&eh->eh_entries, -1);  in ext4_ext_try_to_merge_right()
1832 		WARN_ON(eh->eh_entries == 0);  in ext4_ext_try_to_merge_right()
1833 		if (!eh->eh_entries)  in ext4_ext_try_to_merge_right()
1834 			EXT4_ERROR_INODE(inode, "eh->eh_entries = 0!");  in ext4_ext_try_to_merge_right()
1853 	    (le16_to_cpu(path[0].p_hdr->eh_entries) != 1) ||  in ext4_ext_try_to_merge_up()
1854 	    (le16_to_cpu(path[1].p_hdr->eh_entries) > max_root))  in ext4_ext_try_to_merge_up()
1863 			ext4_free_metadata_revoke_credits(inode->i_sb, 1)))  in ext4_ext_try_to_merge_up()
1870 	s = le16_to_cpu(path[1].p_hdr->eh_entries) *  in ext4_ext_try_to_merge_up()
1878 		(path[1].p_ext - EXT_FIRST_EXTENT(path[1].p_hdr));  in ext4_ext_try_to_merge_up()
1879 	path[0].p_hdr->eh_max = cpu_to_le16(max_root);  in ext4_ext_try_to_merge_up()
1897 	unsigned int depth;  in ext4_ext_try_to_merge()  local
1900 	depth = ext_depth(inode);  in ext4_ext_try_to_merge()
1901 	BUG_ON(path[depth].p_hdr == NULL);  in ext4_ext_try_to_merge()
1902 	eh = path[depth].p_hdr;  in ext4_ext_try_to_merge()
1905 		merge_done = ext4_ext_try_to_merge_right(inode, path, ex - 1);  in ext4_ext_try_to_merge()
1927 	unsigned int depth, len1;  in ext4_ext_check_overlap()  local
1930 	b1 = le32_to_cpu(newext->ee_block);  in ext4_ext_check_overlap()
1932 	depth = ext_depth(inode);  in ext4_ext_check_overlap()
1933 	if (!path[depth].p_ext)  in ext4_ext_check_overlap()
1935 	b2 = EXT4_LBLK_CMASK(sbi, le32_to_cpu(path[depth].p_ext->ee_block));  in ext4_ext_check_overlap()
1950 		len1 = EXT_MAX_BLOCKS - b1;  in ext4_ext_check_overlap()
1951 		newext->ee_len = cpu_to_le16(len1);  in ext4_ext_check_overlap()
1957 		newext->ee_len = cpu_to_le16(b2 - b1);  in ext4_ext_check_overlap()
1968  * creating new leaf in the no-space case.
1979 	int depth, len, err;  in ext4_ext_insert_extent()  local
1987 		return -EFSCORRUPTED;  in ext4_ext_insert_extent()
1989 	depth = ext_depth(inode);  in ext4_ext_insert_extent()
1990 	ex = path[depth].p_ext;  in ext4_ext_insert_extent()
1991 	eh = path[depth].p_hdr;  in ext4_ext_insert_extent()
1992 	if (unlikely(path[depth].p_hdr == NULL)) {  in ext4_ext_insert_extent()
1993 		EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth);  in ext4_ext_insert_extent()
1994 		return -EFSCORRUPTED;  in ext4_ext_insert_extent()
2008 		    (le32_to_cpu(ex->ee_block) +  in ext4_ext_insert_extent()
2010 		    le32_to_cpu(newext->ee_block))) {  in ext4_ext_insert_extent()
2014 			   (le32_to_cpu(newext->ee_block) +  in ext4_ext_insert_extent()
2016 			   le32_to_cpu(ex->ee_block)))  in ext4_ext_insert_extent()
2017 			ex -= 1;  in ext4_ext_insert_extent()
2025 				  le32_to_cpu(ex->ee_block),  in ext4_ext_insert_extent()
2030 						  path + depth);  in ext4_ext_insert_extent()
2034 			ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)  in ext4_ext_insert_extent()
2047 				  le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2050 				  le32_to_cpu(ex->ee_block),  in ext4_ext_insert_extent()
2055 						  path + depth);  in ext4_ext_insert_extent()
2060 			ex->ee_block = newext->ee_block;  in ext4_ext_insert_extent()
2062 			ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)  in ext4_ext_insert_extent()
2071 	depth = ext_depth(inode);  in ext4_ext_insert_extent()
2072 	eh = path[depth].p_hdr;  in ext4_ext_insert_extent()
2073 	if (le16_to_cpu(eh->eh_entries) < le16_to_cpu(eh->eh_max))  in ext4_ext_insert_extent()
2079 	if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block))  in ext4_ext_insert_extent()
2082 		ext_debug(inode, "next leaf block - %u\n", next);  in ext4_ext_insert_extent()
2087 		BUG_ON(npath->p_depth != path->p_depth);  in ext4_ext_insert_extent()
2088 		eh = npath[depth].p_hdr;  in ext4_ext_insert_extent()
2089 		if (le16_to_cpu(eh->eh_entries) < le16_to_cpu(eh->eh_max)) {  in ext4_ext_insert_extent()
2091 				  le16_to_cpu(eh->eh_entries));  in ext4_ext_insert_extent()
2096 			  le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));  in ext4_ext_insert_extent()
2110 	depth = ext_depth(inode);  in ext4_ext_insert_extent()
2111 	eh = path[depth].p_hdr;  in ext4_ext_insert_extent()
2114 	nearex = path[depth].p_ext;  in ext4_ext_insert_extent()
2116 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_insert_extent()
2123 				le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2129 		if (le32_to_cpu(newext->ee_block)  in ext4_ext_insert_extent()
2130 			   > le32_to_cpu(nearex->ee_block)) {  in ext4_ext_insert_extent()
2134 					le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2142 			BUG_ON(newext->ee_block == nearex->ee_block);  in ext4_ext_insert_extent()
2145 					le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2151 		len = EXT_LAST_EXTENT(eh) - nearex + 1;  in ext4_ext_insert_extent()
2155 					le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2165 	le16_add_cpu(&eh->eh_entries, 1);  in ext4_ext_insert_extent()
2166 	path[depth].p_ext = nearex;  in ext4_ext_insert_extent()
2167 	nearex->ee_block = newext->ee_block;  in ext4_ext_insert_extent()
2169 	nearex->ee_len = newext->ee_len;  in ext4_ext_insert_extent()
2182 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_ext_insert_extent()
2193 	ext4_lblk_t next, end = block + num - 1;  in ext4_fill_es_cache_info()
2195 	unsigned char blksize_bits = inode->i_sb->s_blocksize_bits;  in ext4_fill_es_cache_info()
2236  * ext4_ext_find_hole - find hole around given block according to the given path
2252 	int depth = ext_depth(inode);  in ext4_ext_find_hole()  local
2256 	ex = path[depth].p_ext;  in ext4_ext_find_hole()
2258 		/* there is no extent yet, so gap is [0;-] */  in ext4_ext_find_hole()
2261 	} else if (*lblk < le32_to_cpu(ex->ee_block)) {  in ext4_ext_find_hole()
2262 		len = le32_to_cpu(ex->ee_block) - *lblk;  in ext4_ext_find_hole()
2263 	} else if (*lblk >= le32_to_cpu(ex->ee_block)  in ext4_ext_find_hole()
2267 		*lblk = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_find_hole()
2270 		len = next - *lblk;  in ext4_ext_find_hole()
2282 			struct ext4_ext_path *path, int depth)  in ext4_ext_rm_idx()  argument
2288 	depth--;  in ext4_ext_rm_idx()
2289 	path = path + depth;  in ext4_ext_rm_idx()
2290 	leaf = ext4_idx_pblock(path->p_idx);  in ext4_ext_rm_idx()
2291 	if (unlikely(path->p_hdr->eh_entries == 0)) {  in ext4_ext_rm_idx()
2292 		EXT4_ERROR_INODE(inode, "path->p_hdr->eh_entries == 0");  in ext4_ext_rm_idx()
2293 		return -EFSCORRUPTED;  in ext4_ext_rm_idx()
2299 	if (path->p_idx != EXT_LAST_INDEX(path->p_hdr)) {  in ext4_ext_rm_idx()
2300 		int len = EXT_LAST_INDEX(path->p_hdr) - path->p_idx;  in ext4_ext_rm_idx()
2302 		memmove(path->p_idx, path->p_idx + 1, len);  in ext4_ext_rm_idx()
2305 	le16_add_cpu(&path->p_hdr->eh_entries, -1);  in ext4_ext_rm_idx()
2315 	while (--depth >= 0) {  in ext4_ext_rm_idx()
2316 		if (path->p_idx != EXT_FIRST_INDEX(path->p_hdr))  in ext4_ext_rm_idx()
2318 		path--;  in ext4_ext_rm_idx()
2322 		path->p_idx->ei_block = (path+1)->p_idx->ei_block;  in ext4_ext_rm_idx()
2341 		int depth = ext_depth(inode);  in ext4_ext_calc_credits_for_single_extent()  local
2345 		if (le16_to_cpu(path[depth].p_hdr->eh_entries)  in ext4_ext_calc_credits_for_single_extent()
2346 				< le16_to_cpu(path[depth].p_hdr->eh_max)) {  in ext4_ext_calc_credits_for_single_extent()
2357 			ret = 2 + EXT4_META_TRANS_BLOCKS(inode->i_sb);  in ext4_ext_calc_credits_for_single_extent()
2377 	int depth;  in ext4_ext_index_trans_blocks()  local
2383 	depth = ext_depth(inode);  in ext4_ext_index_trans_blocks()
2386 		index = depth * 2;  in ext4_ext_index_trans_blocks()
2388 		index = depth * 3;  in ext4_ext_index_trans_blocks()
2395 	if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode) ||  in get_default_free_blocks_flags()
2404  * ext4_rereserve_cluster - increment the reserved cluster count when
2407  * @inode - file containing the cluster
2408  * @lblk - logical block in cluster to be reserved
2420 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_rereserve_cluster()
2425 	spin_lock(&ei->i_block_reservation_lock);  in ext4_rereserve_cluster()
2426 	ei->i_reserved_data_blocks++;  in ext4_rereserve_cluster()
2427 	percpu_counter_add(&sbi->s_dirtyclusters_counter, 1);  in ext4_rereserve_cluster()
2428 	spin_unlock(&ei->i_block_reservation_lock);  in ext4_rereserve_cluster()
2430 	percpu_counter_add(&sbi->s_freeclusters_counter, 1);  in ext4_rereserve_cluster()
2439 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_remove_blocks()
2446 	if (from < le32_to_cpu(ex->ee_block) ||  in ext4_remove_blocks()
2447 	    to != le32_to_cpu(ex->ee_block) + ee_len - 1) {  in ext4_remove_blocks()
2448 		ext4_error(sbi->s_sb,  in ext4_remove_blocks()
2449 			   "strange request: removal(2) %u-%u from %u:%u",  in ext4_remove_blocks()
2450 			   from, to, le32_to_cpu(ex->ee_block), ee_len);  in ext4_remove_blocks()
2455 	spin_lock(&sbi->s_ext_stats_lock);  in ext4_remove_blocks()
2456 	sbi->s_ext_blocks += ee_len;  in ext4_remove_blocks()
2457 	sbi->s_ext_extents++;  in ext4_remove_blocks()
2458 	if (ee_len < sbi->s_ext_min)  in ext4_remove_blocks()
2459 		sbi->s_ext_min = ee_len;  in ext4_remove_blocks()
2460 	if (ee_len > sbi->s_ext_max)  in ext4_remove_blocks()
2461 		sbi->s_ext_max = ee_len;  in ext4_remove_blocks()
2462 	if (ext_depth(inode) > sbi->s_depth_max)  in ext4_remove_blocks()
2463 		sbi->s_depth_max = ext_depth(inode);  in ext4_remove_blocks()
2464 	spin_unlock(&sbi->s_ext_stats_lock);  in ext4_remove_blocks()
2473 	last_pblk = ext4_ext_pblock(ex) + ee_len - 1;  in ext4_remove_blocks()
2475 	if (partial->state != initial &&  in ext4_remove_blocks()
2476 	    partial->pclu != EXT4_B2C(sbi, last_pblk)) {  in ext4_remove_blocks()
2477 		if (partial->state == tofree) {  in ext4_remove_blocks()
2479 			if (ext4_is_pending(inode, partial->lblk))  in ext4_remove_blocks()
2482 					 EXT4_C2B(sbi, partial->pclu),  in ext4_remove_blocks()
2483 					 sbi->s_cluster_ratio, flags);  in ext4_remove_blocks()
2485 				ext4_rereserve_cluster(inode, partial->lblk);  in ext4_remove_blocks()
2487 		partial->state = initial;  in ext4_remove_blocks()
2490 	num = le32_to_cpu(ex->ee_block) + ee_len - from;  in ext4_remove_blocks()
2491 	pblk = ext4_ext_pblock(ex) + ee_len - num;  in ext4_remove_blocks()
2502 	if ((EXT4_LBLK_COFF(sbi, to) != sbi->s_cluster_ratio - 1) &&  in ext4_remove_blocks()
2504 	    (partial->state != nofree)) {  in ext4_remove_blocks()
2509 				 sbi->s_cluster_ratio, flags);  in ext4_remove_blocks()
2512 		partial->state = initial;  in ext4_remove_blocks()
2528 	if (partial->state != initial && partial->pclu != EXT4_B2C(sbi, pblk))  in ext4_remove_blocks()
2529 		partial->state = initial;  in ext4_remove_blocks()
2538 	 * cluster - we're either  done freeing or the beginning of the  in ext4_remove_blocks()
2542 		if (partial->state == initial) {  in ext4_remove_blocks()
2543 			partial->pclu = EXT4_B2C(sbi, pblk);  in ext4_remove_blocks()
2544 			partial->lblk = from;  in ext4_remove_blocks()
2545 			partial->state = tofree;  in ext4_remove_blocks()
2548 		partial->state = initial;  in ext4_remove_blocks()
2575 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_ext_rm_leaf()
2577 	int depth = ext_depth(inode), credits, revoke_credits;  in ext4_ext_rm_leaf()  local
2589 	if (!path[depth].p_hdr)  in ext4_ext_rm_leaf()
2590 		path[depth].p_hdr = ext_block_hdr(path[depth].p_bh);  in ext4_ext_rm_leaf()
2591 	eh = path[depth].p_hdr;  in ext4_ext_rm_leaf()
2592 	if (unlikely(path[depth].p_hdr == NULL)) {  in ext4_ext_rm_leaf()
2593 		EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth);  in ext4_ext_rm_leaf()
2594 		return -EFSCORRUPTED;  in ext4_ext_rm_leaf()
2597 	ex = path[depth].p_ext;  in ext4_ext_rm_leaf()
2601 	ex_ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_rm_leaf()
2616 		path[depth].p_ext = ex;  in ext4_ext_rm_leaf()
2619 		b = min(ex_ee_block + ex_ee_len - 1, end);  in ext4_ext_rm_leaf()
2632 			if (sbi->s_cluster_ratio > 1) {  in ext4_ext_rm_leaf()
2634 				partial->pclu = EXT4_B2C(sbi, pblk);  in ext4_ext_rm_leaf()
2635 				partial->state = nofree;  in ext4_ext_rm_leaf()
2637 			ex--;  in ext4_ext_rm_leaf()
2638 			ex_ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_rm_leaf()
2641 		} else if (b != ex_ee_block + ex_ee_len - 1) {  in ext4_ext_rm_leaf()
2646 					 ex_ee_block + ex_ee_len - 1);  in ext4_ext_rm_leaf()
2647 			err = -EFSCORRUPTED;  in ext4_ext_rm_leaf()
2651 			num = a - ex_ee_block;  in ext4_ext_rm_leaf()
2662 		credits = 7 + 2*(ex_ee_len/EXT4_BLOCKS_PER_GROUP(inode->i_sb));  in ext4_ext_rm_leaf()
2667 		credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);  in ext4_ext_rm_leaf()
2674 			ext4_free_metadata_revoke_credits(inode->i_sb,  in ext4_ext_rm_leaf()
2676 			ext4_free_data_revoke_credits(inode, b - a + 1);  in ext4_ext_rm_leaf()
2682 				err = -EAGAIN;  in ext4_ext_rm_leaf()
2686 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_rm_leaf()
2698 		ex->ee_len = cpu_to_le16(num);  in ext4_ext_rm_leaf()
2710 			if (end != EXT_MAX_BLOCKS - 1) {  in ext4_ext_rm_leaf()
2716 				memmove(ex, ex+1, (EXT_LAST_EXTENT(eh) - ex) *  in ext4_ext_rm_leaf()
2723 			le16_add_cpu(&eh->eh_entries, -1);  in ext4_ext_rm_leaf()
2726 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_rm_leaf()
2732 		ex--;  in ext4_ext_rm_leaf()
2733 		ex_ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_rm_leaf()
2737 	if (correct_index && eh->eh_entries)  in ext4_ext_rm_leaf()
2747 	if (partial->state == tofree && ex >= EXT_FIRST_EXTENT(eh)) {  in ext4_ext_rm_leaf()
2748 		pblk = ext4_ext_pblock(ex) + ex_ee_len - 1;  in ext4_ext_rm_leaf()
2749 		if (partial->pclu != EXT4_B2C(sbi, pblk)) {  in ext4_ext_rm_leaf()
2752 			if (ext4_is_pending(inode, partial->lblk))  in ext4_ext_rm_leaf()
2755 					 EXT4_C2B(sbi, partial->pclu),  in ext4_ext_rm_leaf()
2756 					 sbi->s_cluster_ratio, flags);  in ext4_ext_rm_leaf()
2758 				ext4_rereserve_cluster(inode, partial->lblk);  in ext4_ext_rm_leaf()
2760 		partial->state = initial;  in ext4_ext_rm_leaf()
2765 	if (err == 0 && eh->eh_entries == 0 && path[depth].p_bh != NULL)  in ext4_ext_rm_leaf()
2766 		err = ext4_ext_rm_idx(handle, inode, path, depth);  in ext4_ext_rm_leaf()
2779 	BUG_ON(path->p_idx == NULL);  in ext4_ext_more_to_rm()
2781 	if (path->p_idx < EXT_FIRST_INDEX(path->p_hdr))  in ext4_ext_more_to_rm()
2788 	if (le16_to_cpu(path->p_hdr->eh_entries) == path->p_block)  in ext4_ext_more_to_rm()
2796 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_ext_remove_space()
2797 	int depth = ext_depth(inode);  in ext4_ext_remove_space()  local
2811 			depth + 1,  in ext4_ext_remove_space()
2812 			ext4_free_metadata_revoke_credits(inode->i_sb, depth));  in ext4_ext_remove_space()
2817 	trace_ext4_ext_remove_space(inode, start, end, depth);  in ext4_ext_remove_space()
2826 	if (end < EXT_MAX_BLOCKS - 1) {  in ext4_ext_remove_space()
2838 		depth = ext_depth(inode);  in ext4_ext_remove_space()
2840 		ex = path[depth].p_ext;  in ext4_ext_remove_space()
2842 			if (depth) {  in ext4_ext_remove_space()
2845 						 depth);  in ext4_ext_remove_space()
2846 				err = -EFSCORRUPTED;  in ext4_ext_remove_space()
2851 		ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_remove_space()
2852 		ex_end = ee_block + ext4_ext_get_actual_len(ex) - 1;  in ext4_ext_remove_space()
2867 			if (sbi->s_cluster_ratio > 1) {  in ext4_ext_remove_space()
2868 				pblk = ext4_ext_pblock(ex) + end - ee_block + 1;  in ext4_ext_remove_space()
2884 		} else if (sbi->s_cluster_ratio > 1 && end >= ex_end &&  in ext4_ext_remove_space()
2909 	 * after i_size and walking into the tree depth-wise.  in ext4_ext_remove_space()
2911 	depth = ext_depth(inode);  in ext4_ext_remove_space()
2913 		int k = i = depth;  in ext4_ext_remove_space()
2914 		while (--k > 0)  in ext4_ext_remove_space()
2916 				le16_to_cpu(path[k].p_hdr->eh_entries)+1;  in ext4_ext_remove_space()
2918 		path = kcalloc(depth + 1, sizeof(struct ext4_ext_path),  in ext4_ext_remove_space()
2922 			return -ENOMEM;  in ext4_ext_remove_space()
2924 		path[0].p_maxdepth = path[0].p_depth = depth;  in ext4_ext_remove_space()
2928 		if (ext4_ext_check(inode, path[0].p_hdr, depth, 0)) {  in ext4_ext_remove_space()
2929 			err = -EFSCORRUPTED;  in ext4_ext_remove_space()
2936 		if (i == depth) {  in ext4_ext_remove_space()
2943 			i--;  in ext4_ext_remove_space()
2956 			path[i].p_block = le16_to_cpu(path[i].p_hdr->eh_entries)+1;  in ext4_ext_remove_space()
2959 				  le16_to_cpu(path[i].p_hdr->eh_entries));  in ext4_ext_remove_space()
2962 			path[i].p_idx--;  in ext4_ext_remove_space()
2965 		ext_debug(inode, "level %d - index, first 0x%p, cur 0x%p\n",  in ext4_ext_remove_space()
2975 						    depth - i - 1,  in ext4_ext_remove_space()
2983 			 * Should be a no-op if we did IO above. */  in ext4_ext_remove_space()
2985 			if (WARN_ON(i + 1 > depth)) {  in ext4_ext_remove_space()
2986 				err = -EFSCORRUPTED;  in ext4_ext_remove_space()
2993 			path[i].p_block = le16_to_cpu(path[i].p_hdr->eh_entries);  in ext4_ext_remove_space()
2997 			if (path[i].p_hdr->eh_entries == 0 && i > 0) {  in ext4_ext_remove_space()
3006 			i--;  in ext4_ext_remove_space()
3011 	trace_ext4_ext_remove_space_done(inode, start, end, depth, &partial,  in ext4_ext_remove_space()
3012 					 path->p_hdr->eh_entries);  in ext4_ext_remove_space()
3025 				 sbi->s_cluster_ratio, flags);  in ext4_ext_remove_space()
3032 	if (path->p_hdr->eh_entries == 0) {  in ext4_ext_remove_space()
3039 			ext_inode_hdr(inode)->eh_depth = 0;  in ext4_ext_remove_space()
3040 			ext_inode_hdr(inode)->eh_max =  in ext4_ext_remove_space()
3048 	if (err == -EAGAIN)  in ext4_ext_remove_space()
3066 		printk(KERN_INFO "EXT4-fs: file extents enabled"  in ext4_ext_init()
3079 		spin_lock_init(&EXT4_SB(sb)->s_ext_stats_lock);  in ext4_ext_init()
3080 		EXT4_SB(sb)->s_ext_min = 1 << 30;  in ext4_ext_init()
3081 		EXT4_SB(sb)->s_ext_max = 0;  in ext4_ext_init()
3095 	if (EXT4_SB(sb)->s_ext_blocks && EXT4_SB(sb)->s_ext_extents) {  in ext4_ext_release()
3097 		printk(KERN_ERR "EXT4-fs: %lu blocks in %lu extents (%lu ave)\n",  in ext4_ext_release()
3098 			sbi->s_ext_blocks, sbi->s_ext_extents,  in ext4_ext_release()
3099 			sbi->s_ext_blocks / sbi->s_ext_extents);  in ext4_ext_release()
3100 		printk(KERN_ERR "EXT4-fs: extents: %lu min, %lu max, max depth %lu\n",  in ext4_ext_release()
3101 			sbi->s_ext_min, sbi->s_ext_max, sbi->s_depth_max);  in ext4_ext_release()
3112 	ee_block  = le32_to_cpu(ex->ee_block);  in ext4_zeroout_es()
3123 /* FIXME!! we need to try to merge to left or right after zero-out  */
3131 	return ext4_issue_zeroout(inode, le32_to_cpu(ex->ee_block), ee_pblock,  in ext4_ext_zeroout()
3168 	unsigned int ee_len, depth;  in ext4_split_extent_at()  local
3178 	depth = ext_depth(inode);  in ext4_split_extent_at()
3179 	ex = path[depth].p_ext;  in ext4_split_extent_at()
3180 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_split_extent_at()
3182 	newblock = split - ee_block + ext4_ext_pblock(ex);  in ext4_split_extent_at()
3190 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_split_extent_at()
3208 		err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_split_extent_at()
3214 	ex->ee_len = cpu_to_le16(split - ee_block);  in ext4_split_extent_at()
3222 	err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_split_extent_at()
3227 	ex2->ee_block = cpu_to_le32(split);  in ext4_split_extent_at()
3228 	ex2->ee_len   = cpu_to_le16(ee_len - (split - ee_block));  in ext4_split_extent_at()
3234 	if (err != -ENOSPC && err != -EDQUOT && err != -ENOMEM)  in ext4_split_extent_at()
3240 	 * guarantees that ext4_find_extent() will not return -ENOMEM,  in ext4_split_extent_at()
3241 	 * otherwise -ENOMEM will cause a retry in do_writepages(), and a  in ext4_split_extent_at()
3252 	depth = ext_depth(inode);  in ext4_split_extent_at()
3253 	ex = path[depth].p_ext;  in ext4_split_extent_at()
3259 				zero_ex.ee_block = ex2->ee_block;  in ext4_split_extent_at()
3266 				zero_ex.ee_block = ex->ee_block;  in ext4_split_extent_at()
3283 			ex->ee_len = cpu_to_le16(ee_len);  in ext4_split_extent_at()
3285 			err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_split_extent_at()
3299 	ex->ee_len = orig_ex.ee_len;  in ext4_split_extent_at()
3302 	 * and err is a non-zero error code.  in ext4_split_extent_at()
3304 	ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_split_extent_at()
3332 	unsigned int ee_len, depth;  in ext4_split_extent()  local
3336 	int allocated = map->m_len;  in ext4_split_extent()
3338 	depth = ext_depth(inode);  in ext4_split_extent()
3339 	ex = path[depth].p_ext;  in ext4_split_extent()
3340 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_split_extent()
3344 	if (map->m_lblk + map->m_len < ee_block + ee_len) {  in ext4_split_extent()
3353 				map->m_lblk + map->m_len, split_flag1, flags1);  in ext4_split_extent()
3357 		allocated = ee_len - (map->m_lblk - ee_block);  in ext4_split_extent()
3363 	path = ext4_find_extent(inode, map->m_lblk, ppath, flags);  in ext4_split_extent()
3366 	depth = ext_depth(inode);  in ext4_split_extent()
3367 	ex = path[depth].p_ext;  in ext4_split_extent()
3370 				 (unsigned long) map->m_lblk);  in ext4_split_extent()
3371 		return -EFSCORRUPTED;  in ext4_split_extent()
3375 	if (map->m_lblk >= ee_block) {  in ext4_split_extent()
3383 				map->m_lblk, split_flag1, flags);  in ext4_split_extent()
3396  * extent into multiple extents (up to three - one initialized and two
3403  * Pre-conditions:
3404  *  - The extent pointed to by 'path' is unwritten.
3405  *  - The extent pointed to by 'path' contains a superset
3406  *    of the logical span [map->m_lblk, map->m_lblk + map->m_len).
3408  * Post-conditions on success:
3409  *  - the returned value is the number of blocks beyond map->l_lblk
3411  *    It is guaranteed to be >= map->m_len.
3426 	unsigned int ee_len, depth, map_len = map->m_len;  in ext4_ext_convert_to_initialized()  local
3433 		  (unsigned long long)map->m_lblk, map_len);  in ext4_ext_convert_to_initialized()
3435 	sbi = EXT4_SB(inode->i_sb);  in ext4_ext_convert_to_initialized()
3436 	eof_block = (EXT4_I(inode)->i_disksize + inode->i_sb->s_blocksize - 1)  in ext4_ext_convert_to_initialized()
3437 			>> inode->i_sb->s_blocksize_bits;  in ext4_ext_convert_to_initialized()
3438 	if (eof_block < map->m_lblk + map_len)  in ext4_ext_convert_to_initialized()
3439 		eof_block = map->m_lblk + map_len;  in ext4_ext_convert_to_initialized()
3441 	depth = ext_depth(inode);  in ext4_ext_convert_to_initialized()
3442 	eh = path[depth].p_hdr;  in ext4_ext_convert_to_initialized()
3443 	ex = path[depth].p_ext;  in ext4_ext_convert_to_initialized()
3444 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_convert_to_initialized()
3451 	/* Pre-conditions */  in ext4_ext_convert_to_initialized()
3453 	BUG_ON(!in_range(map->m_lblk, ee_block, ee_len));  in ext4_ext_convert_to_initialized()
3464 	 *  - L1: we do not deal with writes covering the whole extent.  in ext4_ext_convert_to_initialized()
3467 	 *  - L2: we only attempt to merge with an extent stored in the  in ext4_ext_convert_to_initialized()
3470 	if ((map->m_lblk == ee_block) &&  in ext4_ext_convert_to_initialized()
3478 		abut_ex = ex - 1;  in ext4_ext_convert_to_initialized()
3479 		prev_lblk = le32_to_cpu(abut_ex->ee_block);  in ext4_ext_convert_to_initialized()
3487 		 * - C1: abut_ex is initialized,  in ext4_ext_convert_to_initialized()
3488 		 * - C2: abut_ex is logically abutting ex,  in ext4_ext_convert_to_initialized()
3489 		 * - C3: abut_ex is physically abutting ex,  in ext4_ext_convert_to_initialized()
3490 		 * - C4: abut_ex can receive the additional blocks without  in ext4_ext_convert_to_initialized()
3496 			(prev_len < (EXT_INIT_MAX_LEN - map_len))) {	/*C4*/  in ext4_ext_convert_to_initialized()
3497 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3505 			ex->ee_block = cpu_to_le32(ee_block + map_len);  in ext4_ext_convert_to_initialized()
3507 			ex->ee_len = cpu_to_le16(ee_len - map_len);  in ext4_ext_convert_to_initialized()
3511 			abut_ex->ee_len = cpu_to_le16(prev_len + map_len);  in ext4_ext_convert_to_initialized()
3516 	} else if (((map->m_lblk + map_len) == (ee_block + ee_len)) &&  in ext4_ext_convert_to_initialized()
3525 		next_lblk = le32_to_cpu(abut_ex->ee_block);  in ext4_ext_convert_to_initialized()
3533 		 * - C1: abut_ex is initialized,  in ext4_ext_convert_to_initialized()
3534 		 * - C2: abut_ex is logically abutting ex,  in ext4_ext_convert_to_initialized()
3535 		 * - C3: abut_ex is physically abutting ex,  in ext4_ext_convert_to_initialized()
3536 		 * - C4: abut_ex can receive the additional blocks without  in ext4_ext_convert_to_initialized()
3540 		    ((map->m_lblk + map_len) == next_lblk) &&		/*C2*/  in ext4_ext_convert_to_initialized()
3542 		    (next_len < (EXT_INIT_MAX_LEN - map_len))) {	/*C4*/  in ext4_ext_convert_to_initialized()
3543 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3551 			abut_ex->ee_block = cpu_to_le32(next_lblk - map_len);  in ext4_ext_convert_to_initialized()
3552 			ext4_ext_store_pblock(abut_ex, next_pblk - map_len);  in ext4_ext_convert_to_initialized()
3553 			ex->ee_len = cpu_to_le16(ee_len - map_len);  in ext4_ext_convert_to_initialized()
3557 			abut_ex->ee_len = cpu_to_le16(next_len + map_len);  in ext4_ext_convert_to_initialized()
3565 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3568 		path[depth].p_ext = abut_ex;  in ext4_ext_convert_to_initialized()
3571 		allocated = ee_len - (map->m_lblk - ee_block);  in ext4_ext_convert_to_initialized()
3573 	WARN_ON(map->m_lblk < ee_block);  in ext4_ext_convert_to_initialized()
3581 		max_zeroout = sbi->s_extent_max_zeroout_kb >>  in ext4_ext_convert_to_initialized()
3582 			(inode->i_sb->s_blocksize_bits - 10);  in ext4_ext_convert_to_initialized()
3595 	split_map.m_lblk = map->m_lblk;  in ext4_ext_convert_to_initialized()
3596 	split_map.m_len = map->m_len;  in ext4_ext_convert_to_initialized()
3605 				cpu_to_le16(allocated - split_map.m_len);  in ext4_ext_convert_to_initialized()
3608 				split_map.m_len - ee_block);  in ext4_ext_convert_to_initialized()
3614 		if (split_map.m_lblk - ee_block + split_map.m_len <  in ext4_ext_convert_to_initialized()
3618 				zero_ex2.ee_block = ex->ee_block;  in ext4_ext_convert_to_initialized()
3619 				zero_ex2.ee_len = cpu_to_le16(split_map.m_lblk -  in ext4_ext_convert_to_initialized()
3628 			split_map.m_len += split_map.m_lblk - ee_block;  in ext4_ext_convert_to_initialized()
3630 			allocated = map->m_len;  in ext4_ext_convert_to_initialized()
3660  * This works the same way in the case of initialized -> unwritten conversion.
3683 	int split_flag = 0, depth;  in ext4_split_convert_extents()  local
3686 		  (unsigned long long)map->m_lblk, map->m_len);  in ext4_split_convert_extents()
3688 	eof_block = (EXT4_I(inode)->i_disksize + inode->i_sb->s_blocksize - 1)  in ext4_split_convert_extents()
3689 			>> inode->i_sb->s_blocksize_bits;  in ext4_split_convert_extents()
3690 	if (eof_block < map->m_lblk + map->m_len)  in ext4_split_convert_extents()
3691 		eof_block = map->m_lblk + map->m_len;  in ext4_split_convert_extents()
3696 	depth = ext_depth(inode);  in ext4_split_convert_extents()
3697 	ex = path[depth].p_ext;  in ext4_split_convert_extents()
3698 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_split_convert_extents()
3723 	int depth;  in ext4_convert_unwritten_extents_endio()  local
3726 	depth = ext_depth(inode);  in ext4_convert_unwritten_extents_endio()
3727 	ex = path[depth].p_ext;  in ext4_convert_unwritten_extents_endio()
3728 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_convert_unwritten_extents_endio()
3740 	if (ee_block != map->m_lblk || ee_len > map->m_len) {  in ext4_convert_unwritten_extents_endio()
3742 		ext4_warning(inode->i_sb, "Inode (%ld) finished: extent logical block %llu,"  in ext4_convert_unwritten_extents_endio()
3744 			     inode->i_ino, (unsigned long long)ee_block, ee_len,  in ext4_convert_unwritten_extents_endio()
3745 			     (unsigned long long)map->m_lblk, map->m_len);  in ext4_convert_unwritten_extents_endio()
3751 		path = ext4_find_extent(inode, map->m_lblk, ppath, 0);  in ext4_convert_unwritten_extents_endio()
3754 		depth = ext_depth(inode);  in ext4_convert_unwritten_extents_endio()
3755 		ex = path[depth].p_ext;  in ext4_convert_unwritten_extents_endio()
3758 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_convert_unwritten_extents_endio()
3770 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_convert_unwritten_extents_endio()
3786 	int depth;  in convert_initialized_extent()  local
3793 	if (map->m_len > EXT_UNWRITTEN_MAX_LEN)  in convert_initialized_extent()
3794 		map->m_len = EXT_UNWRITTEN_MAX_LEN / 2;  in convert_initialized_extent()
3796 	depth = ext_depth(inode);  in convert_initialized_extent()
3797 	ex = path[depth].p_ext;  in convert_initialized_extent()
3798 	ee_block = le32_to_cpu(ex->ee_block);  in convert_initialized_extent()
3804 	if (ee_block != map->m_lblk || ee_len > map->m_len) {  in convert_initialized_extent()
3809 		path = ext4_find_extent(inode, map->m_lblk, ppath, 0);  in convert_initialized_extent()
3812 		depth = ext_depth(inode);  in convert_initialized_extent()
3813 		ex = path[depth].p_ext;  in convert_initialized_extent()
3816 					 (unsigned long) map->m_lblk);  in convert_initialized_extent()
3817 			return -EFSCORRUPTED;  in convert_initialized_extent()
3821 	err = ext4_ext_get_access(handle, inode, path + depth);  in convert_initialized_extent()
3833 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in convert_initialized_extent()
3840 	map->m_flags |= EXT4_MAP_UNWRITTEN;  in convert_initialized_extent()
3841 	if (*allocated > map->m_len)  in convert_initialized_extent()
3842 		*allocated = map->m_len;  in convert_initialized_extent()
3843 	map->m_len = *allocated;  in convert_initialized_extent()
3857 		  (unsigned long long)map->m_lblk, map->m_len, flags,  in ext4_ext_handle_unwritten_extents()
3885 					 map->m_len);  in ext4_ext_handle_unwritten_extents()
3886 			err = -EFSCORRUPTED;  in ext4_ext_handle_unwritten_extents()
3889 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_handle_unwritten_extents()
3907 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_handle_unwritten_extents()
3920 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_handle_unwritten_extents()
3941 				 map->m_len);  in ext4_ext_handle_unwritten_extents()
3942 		err = -EFSCORRUPTED;  in ext4_ext_handle_unwritten_extents()
3948 	map->m_flags |= EXT4_MAP_NEW;  in ext4_ext_handle_unwritten_extents()
3950 	map->m_flags |= EXT4_MAP_MAPPED;  in ext4_ext_handle_unwritten_extents()
3952 	map->m_pblk = newblock;  in ext4_ext_handle_unwritten_extents()
3953 	if (allocated > map->m_len)  in ext4_ext_handle_unwritten_extents()
3954 		allocated = map->m_len;  in ext4_ext_handle_unwritten_extents()
3955 	map->m_len = allocated;  in ext4_ext_handle_unwritten_extents()
3962  * get_implied_cluster_alloc - check to see if the requested
3966  *	@map	The requested lblk->pblk mapping
3976  *		 |--- cluster # N--|
3977  *    |--- extent ---|	|---- requested region ---|
3982  *   |--------- cluster # N ----------------|
3983  *	   |--- requested region --|   |------- extent ----|
3988  *          |------------- cluster # N-------------|
3989  * |----- ex -----|                  |---- ex_right ----|
3990  *                  |------ requested region ------|
3993  * In each of the above cases, we need to set the map->m_pblk and
3994  * map->m_len so it corresponds to the return the extent labelled as
3996  * cluster EXT4_B2C(sbi, map->m_lblk).	We will then return 1 to
3997  * signal to ext4_ext_map_blocks() that map->m_pblk should be treated
4008 	ext4_lblk_t c_offset = EXT4_LBLK_COFF(sbi, map->m_lblk);  in get_implied_cluster_alloc()
4011 	ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block);  in get_implied_cluster_alloc()
4017 	ex_cluster_end = EXT4_B2C(sbi, ee_block + ee_len - 1);  in get_implied_cluster_alloc()
4020 	rr_cluster_start = EXT4_B2C(sbi, map->m_lblk);  in get_implied_cluster_alloc()
4025 			ee_start += ee_len - 1;  in get_implied_cluster_alloc()
4026 		map->m_pblk = EXT4_PBLK_CMASK(sbi, ee_start) + c_offset;  in get_implied_cluster_alloc()
4027 		map->m_len = min(map->m_len,  in get_implied_cluster_alloc()
4028 				 (unsigned) sbi->s_cluster_ratio - c_offset);  in get_implied_cluster_alloc()
4032 		 *   |--------- cluster # N-------------|  in get_implied_cluster_alloc()
4033 		 *		       |------- extent ----|  in get_implied_cluster_alloc()
4034 		 *	   |--- requested region ---|  in get_implied_cluster_alloc()
4038 		if (map->m_lblk < ee_block)  in get_implied_cluster_alloc()
4039 			map->m_len = min(map->m_len, ee_block - map->m_lblk);  in get_implied_cluster_alloc()
4045 		 *          |------------- cluster # N-------------|  in get_implied_cluster_alloc()
4046 		 * |----- ex -----|                  |---- ex_right ----|  in get_implied_cluster_alloc()
4047 		 *                  |------ requested region ------|  in get_implied_cluster_alloc()
4050 		if (map->m_lblk > ee_block) {  in get_implied_cluster_alloc()
4052 			map->m_len = min(map->m_len, next - map->m_lblk);  in get_implied_cluster_alloc()
4081 				  hole_start + len - 1, &es);  in ext4_ext_determine_insert_hole()
4094 		len -= lblk - hole_start;  in ext4_ext_determine_insert_hole()
4104 		len = es.es_lblk + es.es_len - lblk;  in ext4_ext_determine_insert_hole()
4112 		len = min(es.es_lblk - hole_start, len);  in ext4_ext_determine_insert_hole()
4117 	ext_debug(inode, " -> %u:%u\n", hole_start, len);  in ext4_ext_determine_insert_hole()
4122 		len -= lblk - hole_start;  in ext4_ext_determine_insert_hole()
4132  * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
4133  * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
4136  *          if create == 0 and these are pre-allocated blocks
4150 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_ext_map_blocks()
4152 	int err = 0, depth, ret;  in ext4_ext_map_blocks()  local
4158 	ext_debug(inode, "blocks %u/%u requested\n", map->m_lblk, map->m_len);  in ext4_ext_map_blocks()
4159 	trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags);  in ext4_ext_map_blocks()
4162 	path = ext4_find_extent(inode, map->m_lblk, NULL, 0);  in ext4_ext_map_blocks()
4169 	depth = ext_depth(inode);  in ext4_ext_map_blocks()
4176 	if (unlikely(path[depth].p_ext == NULL && depth != 0)) {  in ext4_ext_map_blocks()
4178 				 "lblock: %lu, depth: %d pblock %lld",  in ext4_ext_map_blocks()
4179 				 (unsigned long) map->m_lblk, depth,  in ext4_ext_map_blocks()
4180 				 path[depth].p_block);  in ext4_ext_map_blocks()
4181 		err = -EFSCORRUPTED;  in ext4_ext_map_blocks()
4185 	ex = path[depth].p_ext;  in ext4_ext_map_blocks()
4187 		ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_map_blocks()
4201 		if (in_range(map->m_lblk, ee_block, ee_len)) {  in ext4_ext_map_blocks()
4202 			newblock = map->m_lblk - ee_block + ee_start;  in ext4_ext_map_blocks()
4204 			allocated = ee_len - (map->m_lblk - ee_block);  in ext4_ext_map_blocks()
4205 			ext_debug(inode, "%u fit into %u:%d -> %llu\n",  in ext4_ext_map_blocks()
4206 				  map->m_lblk, ee_block, ee_len, newblock);  in ext4_ext_map_blocks()
4218 				map->m_flags |= EXT4_MAP_MAPPED;  in ext4_ext_map_blocks()
4219 				map->m_pblk = newblock;  in ext4_ext_map_blocks()
4220 				if (allocated > map->m_len)  in ext4_ext_map_blocks()
4221 					allocated = map->m_len;  in ext4_ext_map_blocks()
4222 				map->m_len = allocated;  in ext4_ext_map_blocks()
4245 		len = ext4_ext_determine_insert_hole(inode, path, map->m_lblk);  in ext4_ext_map_blocks()
4247 		map->m_pblk = 0;  in ext4_ext_map_blocks()
4248 		map->m_len = min_t(unsigned int, map->m_len, len);  in ext4_ext_map_blocks()
4255 	newex.ee_block = cpu_to_le32(map->m_lblk);  in ext4_ext_map_blocks()
4256 	cluster_offset = EXT4_LBLK_COFF(sbi, map->m_lblk);  in ext4_ext_map_blocks()
4263 	    get_implied_cluster_alloc(inode->i_sb, map, ex, path)) {  in ext4_ext_map_blocks()
4264 		ar.len = allocated = map->m_len;  in ext4_ext_map_blocks()
4265 		newblock = map->m_pblk;  in ext4_ext_map_blocks()
4270 	ar.lleft = map->m_lblk;  in ext4_ext_map_blocks()
4274 	ar.lright = map->m_lblk;  in ext4_ext_map_blocks()
4281 	if ((sbi->s_cluster_ratio > 1) && err &&  in ext4_ext_map_blocks()
4282 	    get_implied_cluster_alloc(inode->i_sb, map, &ex2, path)) {  in ext4_ext_map_blocks()
4283 		ar.len = allocated = map->m_len;  in ext4_ext_map_blocks()
4284 		newblock = map->m_pblk;  in ext4_ext_map_blocks()
4294 	if (map->m_len > EXT_INIT_MAX_LEN &&  in ext4_ext_map_blocks()
4296 		map->m_len = EXT_INIT_MAX_LEN;  in ext4_ext_map_blocks()
4297 	else if (map->m_len > EXT_UNWRITTEN_MAX_LEN &&  in ext4_ext_map_blocks()
4299 		map->m_len = EXT_UNWRITTEN_MAX_LEN;  in ext4_ext_map_blocks()
4302 	newex.ee_len = cpu_to_le16(map->m_len);  in ext4_ext_map_blocks()
4307 		allocated = map->m_len;  in ext4_ext_map_blocks()
4311 	ar.goal = ext4_ext_find_goal(inode, path, map->m_lblk);  in ext4_ext_map_blocks()
4312 	ar.logical = map->m_lblk;  in ext4_ext_map_blocks()
4321 	offset = EXT4_LBLK_COFF(sbi, map->m_lblk);  in ext4_ext_map_blocks()
4323 	ar.goal -= offset;  in ext4_ext_map_blocks()
4324 	ar.logical -= offset;  in ext4_ext_map_blocks()
4325 	if (S_ISREG(inode->i_mode))  in ext4_ext_map_blocks()
4328 		/* disable in-core preallocation for non-regular files */  in ext4_ext_map_blocks()
4340 	ar.len = EXT4_C2B(sbi, ar.len) - offset;  in ext4_ext_map_blocks()
4354 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_map_blocks()
4383 	if (test_opt(inode->i_sb, DELALLOC) && allocated_clusters) {  in ext4_ext_map_blocks()
4396 			 * When allocating non-delayed allocated clusters  in ext4_ext_map_blocks()
4406 			lblk = EXT4_LBLK_CMASK(sbi, map->m_lblk);  in ext4_ext_map_blocks()
4407 			len = allocated_clusters << sbi->s_cluster_bits;  in ext4_ext_map_blocks()
4423 	map->m_flags |= (EXT4_MAP_NEW | EXT4_MAP_MAPPED);  in ext4_ext_map_blocks()
4424 	map->m_pblk = pblk;  in ext4_ext_map_blocks()
4425 	map->m_len = ar.len;  in ext4_ext_map_blocks()
4426 	allocated = map->m_len;  in ext4_ext_map_blocks()
4438 	struct super_block *sb = inode->i_sb;  in ext4_ext_truncate()
4449 	EXT4_I(inode)->i_disksize = inode->i_size;  in ext4_ext_truncate()
4454 	last_block = (inode->i_size + sb->s_blocksize - 1)  in ext4_ext_truncate()
4456 	ext4_es_remove_extent(inode, last_block, EXT_MAX_BLOCKS - last_block);  in ext4_ext_truncate()
4459 	err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCKS - 1);  in ext4_ext_truncate()
4460 	if (err == -ENOMEM) {  in ext4_ext_truncate()
4475 	int depth = 0;  in ext4_alloc_file_blocks()  local
4495 	depth = ext_depth(inode);  in ext4_alloc_file_blocks()
4500 		 * Recalculate credits when extent tree depth changes.  in ext4_alloc_file_blocks()
4502 		if (depth != ext_depth(inode)) {  in ext4_alloc_file_blocks()
4504 			depth = ext_depth(inode);  in ext4_alloc_file_blocks()
4517 				   inode->i_ino, map.m_lblk,  in ext4_alloc_file_blocks()
4528 		map.m_len = len = len - ret;  in ext4_alloc_file_blocks()
4529 		epos = (loff_t)map.m_lblk << inode->i_blkbits;  in ext4_alloc_file_blocks()
4540 						     old_size, epos - old_size);  in ext4_alloc_file_blocks()
4550 	if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))  in ext4_alloc_file_blocks()
4564 	struct address_space *mapping = file->f_mapping;  in ext4_zero_range()
4574 	unsigned int blkbits = inode->i_blkbits;  in ext4_zero_range()
4589 		return -EINVAL;  in ext4_zero_range()
4590 	partial_begin = offset & ((1 << blkbits) - 1);  in ext4_zero_range()
4591 	partial_end = (offset + len) & ((1 << blkbits) - 1);  in ext4_zero_range()
4598 		max_blocks -= lblk;  in ext4_zero_range()
4606 		ret = -EOPNOTSUPP;  in ext4_zero_range()
4611 	    (offset + len > inode->i_size ||  in ext4_zero_range()
4612 	     offset + len > EXT4_I(inode)->i_disksize)) {  in ext4_zero_range()
4632 				(round_up((offset + len), 1 << blkbits) -  in ext4_zero_range()
4670 							   end - 1);  in ext4_zero_range()
4678 		truncate_pagecache_range(inode, start, end - 1);  in ext4_zero_range()
4700 		ext4_std_error(inode->i_sb, ret);  in ext4_zero_range()
4715 	if (file->f_flags & O_SYNC)  in ext4_zero_range()
4728  * For block-mapped files, posix_fallocate should fall back to the method
4740 	unsigned int blkbits = inode->i_blkbits;  in ext4_fallocate()
4744 	 * range since we would need to re-encrypt blocks with a  in ext4_fallocate()
4750 		return -EOPNOTSUPP;  in ext4_fallocate()
4756 		return -EOPNOTSUPP;  in ext4_fallocate()
4792 	 * We only support preallocation for extent-based files only  in ext4_fallocate()
4795 		ret = -EOPNOTSUPP;  in ext4_fallocate()
4800 	    (offset + len > inode->i_size ||  in ext4_fallocate()
4801 	     offset + len > EXT4_I(inode)->i_disksize)) {  in ext4_fallocate()
4819 	if (file->f_flags & O_SYNC && EXT4_SB(inode->i_sb)->s_journal) {  in ext4_fallocate()
4820 		ret = ext4_fc_commit(EXT4_SB(inode->i_sb)->s_journal,  in ext4_fallocate()
4821 					EXT4_I(inode)->i_sync_tid);  in ext4_fallocate()
4846 	unsigned int blkbits = inode->i_blkbits;  in ext4_convert_unwritten_extents()
4860 		map.m_len = (max_blocks -= ret);  in ext4_convert_unwritten_extents()
4872 			ext4_warning(inode->i_sb,  in ext4_convert_unwritten_extents()
4875 				     inode->i_ino, map.m_lblk,  in ext4_convert_unwritten_extents()
4907 	list_for_each_entry(io_end_vec, &io_end->list_vec, list) {  in ext4_convert_unwritten_io_end_vec()
4908 		ret = ext4_convert_unwritten_extents(handle, io_end->inode,  in ext4_convert_unwritten_io_end_vec()
4909 						     io_end_vec->offset,  in ext4_convert_unwritten_io_end_vec()
4910 						     io_end_vec->size);  in ext4_convert_unwritten_io_end_vec()
4925 	int blockbits = inode->i_sb->s_blocksize_bits;  in ext4_iomap_xattr_fiemap()
4929 	/* in-inode? */  in ext4_iomap_xattr_fiemap()
4937 		physical = (__u64)iloc.bh->b_blocknr << blockbits;  in ext4_iomap_xattr_fiemap()
4939 				EXT4_I(inode)->i_extra_isize;  in ext4_iomap_xattr_fiemap()
4941 		length = EXT4_SB(inode->i_sb)->s_inode_size - offset;  in ext4_iomap_xattr_fiemap()
4944 	} else if (EXT4_I(inode)->i_file_acl) { /* external block */  in ext4_iomap_xattr_fiemap()
4945 		physical = (__u64)EXT4_I(inode)->i_file_acl << blockbits;  in ext4_iomap_xattr_fiemap()
4946 		length = inode->i_sb->s_blocksize;  in ext4_iomap_xattr_fiemap()
4949 		/* no in-inode or external block for xattr, so return -ENOENT */  in ext4_iomap_xattr_fiemap()
4950 		error = -ENOENT;  in ext4_iomap_xattr_fiemap()
4954 	iomap->addr = physical;  in ext4_iomap_xattr_fiemap()
4955 	iomap->offset = 0;  in ext4_iomap_xattr_fiemap()
4956 	iomap->length = length;  in ext4_iomap_xattr_fiemap()
4957 	iomap->type = iomap_type;  in ext4_iomap_xattr_fiemap()
4958 	iomap->flags = 0;  in ext4_iomap_xattr_fiemap()
4970 	if (error == 0 && (offset >= iomap->length))  in ext4_iomap_xattr_begin()
4971 		error = -ENOENT;  in ext4_iomap_xattr_begin()
4984 		maxbytes = inode->i_sb->s_maxbytes;  in ext4_fiemap_check_ranges()
4986 		maxbytes = EXT4_SB(inode->i_sb)->s_bitmap_maxbytes;  in ext4_fiemap_check_ranges()
4989 		return -EINVAL;  in ext4_fiemap_check_ranges()
4991 		return -EFBIG;  in ext4_fiemap_check_ranges()
4996 	if (*len > maxbytes || (maxbytes - *len) < start)  in ext4_fiemap_check_ranges()
4997 		*len = maxbytes - start;  in ext4_fiemap_check_ranges()
5006 	if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {  in ext4_fiemap()
5010 		fieinfo->fi_flags &= ~FIEMAP_FLAG_CACHE;  in ext4_fiemap()
5022 	if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {  in ext4_fiemap()
5023 		fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;  in ext4_fiemap()
5041 		down_read(&EXT4_I(inode)->xattr_sem);  in ext4_get_es_cache()
5043 		up_read(&EXT4_I(inode)->xattr_sem);  in ext4_get_es_cache()
5048 	if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {  in ext4_get_es_cache()
5052 		fieinfo->fi_flags &= ~FIEMAP_FLAG_CACHE;  in ext4_get_es_cache()
5063 	start_blk = start >> inode->i_sb->s_blocksize_bits;  in ext4_get_es_cache()
5064 	last_blk = (start + len - 1) >> inode->i_sb->s_blocksize_bits;  in ext4_get_es_cache()
5066 		last_blk = EXT_MAX_BLOCKS-1;  in ext4_get_es_cache()
5067 	len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1;  in ext4_get_es_cache()
5078  * Shift the extents of a path structure lying between path[depth].p_ext
5079  * and EXT_LAST_EXTENT(path[depth].p_hdr), by @shift blocks. @SHIFT tells
5087 	int depth, err = 0;  in ext4_ext_shift_path_extents()  local
5091 	depth = path->p_depth;  in ext4_ext_shift_path_extents()
5093 	while (depth >= 0) {  in ext4_ext_shift_path_extents()
5094 		if (depth == path->p_depth) {  in ext4_ext_shift_path_extents()
5095 			ex_start = path[depth].p_ext;  in ext4_ext_shift_path_extents()
5097 				return -EFSCORRUPTED;  in ext4_ext_shift_path_extents()
5099 			ex_last = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_path_extents()
5102 			if (ex_start == EXT_FIRST_EXTENT(path[depth].p_hdr)) {  in ext4_ext_shift_path_extents()
5105 				credits = depth + 2;  in ext4_ext_shift_path_extents()
5113 					err = -EAGAIN;  in ext4_ext_shift_path_extents()
5117 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5123 					le32_add_cpu(&ex_start->ee_block,  in ext4_ext_shift_path_extents()
5124 						-shift);  in ext4_ext_shift_path_extents()
5127 					    EXT_FIRST_EXTENT(path[depth].p_hdr))  in ext4_ext_shift_path_extents()
5130 					    path, ex_start - 1))  in ext4_ext_shift_path_extents()
5131 						ex_last--;  in ext4_ext_shift_path_extents()
5135 					le32_add_cpu(&ex_last->ee_block, shift);  in ext4_ext_shift_path_extents()
5138 					ex_last--;  in ext4_ext_shift_path_extents()
5141 			err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5145 			if (--depth < 0 || !update)  in ext4_ext_shift_path_extents()
5150 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5155 			le32_add_cpu(&path[depth].p_idx->ei_block, -shift);  in ext4_ext_shift_path_extents()
5157 			le32_add_cpu(&path[depth].p_idx->ei_block, shift);  in ext4_ext_shift_path_extents()
5158 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5163 		if (path[depth].p_idx != EXT_FIRST_INDEX(path[depth].p_hdr))  in ext4_ext_shift_path_extents()
5166 		depth--;  in ext4_ext_shift_path_extents()
5186 	int ret = 0, depth;  in ext4_ext_shift_extents()  local
5192 	path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL,  in ext4_ext_shift_extents()
5197 	depth = path->p_depth;  in ext4_ext_shift_extents()
5198 	extent = path[depth].p_ext;  in ext4_ext_shift_extents()
5202 	stop = le32_to_cpu(extent->ee_block);  in ext4_ext_shift_extents()
5210 		path = ext4_find_extent(inode, start - 1, &path,  in ext4_ext_shift_extents()
5214 		depth = path->p_depth;  in ext4_ext_shift_extents()
5215 		extent =  path[depth].p_ext;  in ext4_ext_shift_extents()
5217 			ex_start = le32_to_cpu(extent->ee_block);  in ext4_ext_shift_extents()
5218 			ex_end = le32_to_cpu(extent->ee_block) +  in ext4_ext_shift_extents()
5226 		    (shift > start - ex_end)) {  in ext4_ext_shift_extents()
5227 			ret = -EINVAL;  in ext4_ext_shift_extents()
5231 		if (shift > EXT_MAX_BLOCKS -  in ext4_ext_shift_extents()
5233 			ret = -EINVAL;  in ext4_ext_shift_extents()
5263 		depth = path->p_depth;  in ext4_ext_shift_extents()
5264 		extent = path[depth].p_ext;  in ext4_ext_shift_extents()
5268 			return -EFSCORRUPTED;  in ext4_ext_shift_extents()
5271 		    le32_to_cpu(extent->ee_block)) {  in ext4_ext_shift_extents()
5273 			if (extent < EXT_LAST_EXTENT(path[depth].p_hdr)) {  in ext4_ext_shift_extents()
5274 				path[depth].p_ext++;  in ext4_ext_shift_extents()
5283 			extent = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5284 			*iterator = le32_to_cpu(extent->ee_block) +  in ext4_ext_shift_extents()
5287 			extent = EXT_FIRST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5288 			if (le32_to_cpu(extent->ee_block) > start)  in ext4_ext_shift_extents()
5289 				*iterator = le32_to_cpu(extent->ee_block) - 1;  in ext4_ext_shift_extents()
5290 			else if (le32_to_cpu(extent->ee_block) == start)  in ext4_ext_shift_extents()
5293 				extent = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5294 				while (le32_to_cpu(extent->ee_block) >= start)  in ext4_ext_shift_extents()
5295 					extent--;  in ext4_ext_shift_extents()
5297 				if (extent == EXT_LAST_EXTENT(path[depth].p_hdr))  in ext4_ext_shift_extents()
5303 			path[depth].p_ext = extent;  in ext4_ext_shift_extents()
5308 		if (ret == -EAGAIN)  in ext4_ext_shift_extents()
5321  * Returns: 0 and non-zero on error.
5326 	struct super_block *sb = inode->i_sb;  in ext4_collapse_range()
5327 	struct address_space *mapping = inode->i_mapping;  in ext4_collapse_range()
5340 		return -EOPNOTSUPP;  in ext4_collapse_range()
5344 		return -EINVAL;  in ext4_collapse_range()
5356 	if (offset + len >= inode->i_size) {  in ext4_collapse_range()
5357 		ret = -EINVAL;  in ext4_collapse_range()
5363 		ret = -EOPNOTSUPP;  in ext4_collapse_range()
5415 	down_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5417 	ext4_es_remove_extent(inode, punch_start, EXT_MAX_BLOCKS - punch_start);  in ext4_collapse_range()
5419 	ret = ext4_ext_remove_space(inode, punch_start, punch_stop - 1);  in ext4_collapse_range()
5421 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5427 				     punch_stop - punch_start, SHIFT_LEFT);  in ext4_collapse_range()
5429 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5433 	new_size = inode->i_size - len;  in ext4_collapse_range()
5435 	EXT4_I(inode)->i_disksize = new_size;  in ext4_collapse_range()
5437 	up_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5464 	struct super_block *sb = inode->i_sb;  in ext4_insert_range()
5465 	struct address_space *mapping = inode->i_mapping;  in ext4_insert_range()
5471 	int ret = 0, depth, split_flag = 0;  in ext4_insert_range()  local
5480 		return -EOPNOTSUPP;  in ext4_insert_range()
5484 		return -EINVAL;  in ext4_insert_range()
5494 		ret = -EOPNOTSUPP;  in ext4_insert_range()
5499 	if (len > inode->i_sb->s_maxbytes - inode->i_size) {  in ext4_insert_range()
5500 		ret = -EFBIG;  in ext4_insert_range()
5505 	if (offset >= inode->i_size) {  in ext4_insert_range()
5506 		ret = -EINVAL;  in ext4_insert_range()
5533 	ret = filemap_write_and_wait_range(inode->i_mapping, ioffset,  in ext4_insert_range()
5548 	inode->i_size += len;  in ext4_insert_range()
5549 	EXT4_I(inode)->i_disksize += len;  in ext4_insert_range()
5555 	down_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5560 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5565 	depth = ext_depth(inode);  in ext4_insert_range()
5566 	extent = path[depth].p_ext;  in ext4_insert_range()
5568 		ee_start_lblk = le32_to_cpu(extent->ee_block);  in ext4_insert_range()
5589 			up_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5596 	ext4_es_remove_extent(inode, offset_lblk, EXT_MAX_BLOCKS - offset_lblk);  in ext4_insert_range()
5605 	up_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5621  * ext4_swap_extents() - Swap extents between two inodes
5632  * stuff such as page-cache locking consistency, bh mapping consistency or
5649 	BUG_ON(!rwsem_is_locked(&EXT4_I(inode1)->i_data_sem));  in ext4_swap_extents()
5650 	BUG_ON(!rwsem_is_locked(&EXT4_I(inode2)->i_data_sem));  in ext4_swap_extents()
5677 		ex1 = path1[path1->p_depth].p_ext;  in ext4_swap_extents()
5678 		ex2 = path2[path2->p_depth].p_ext;  in ext4_swap_extents()
5683 		e1_blk = le32_to_cpu(ex1->ee_block);  in ext4_swap_extents()
5684 		e2_blk = le32_to_cpu(ex2->ee_block);  in ext4_swap_extents()
5705 			len = next1 - lblk1;  in ext4_swap_extents()
5706 			if (len < next2 - lblk2)  in ext4_swap_extents()
5707 				len = next2 - lblk2;  in ext4_swap_extents()
5712 			count -= len;  in ext4_swap_extents()
5738 		if (len > e1_blk + e1_len - lblk1)  in ext4_swap_extents()
5739 			len = e1_blk + e1_len - lblk1;  in ext4_swap_extents()
5740 		if (len > e2_blk + e2_len - lblk2)  in ext4_swap_extents()
5741 			len = e2_blk + e2_len - lblk2;  in ext4_swap_extents()
5763 		*erp = ext4_ext_get_access(handle, inode1, path1 + path1->p_depth);  in ext4_swap_extents()
5766 		*erp = ext4_ext_get_access(handle, inode2, path2 + path2->p_depth);  in ext4_swap_extents()
5774 		ex1->ee_len = cpu_to_le16(e2_len);  in ext4_swap_extents()
5775 		ex2->ee_len = cpu_to_le16(e1_len);  in ext4_swap_extents()
5784 				      path2->p_depth);  in ext4_swap_extents()
5788 				      path1->p_depth);  in ext4_swap_extents()
5800 		count -= len;  in ext4_swap_extents()
5811  * ext4_clu_mapped - determine whether any block in a logical cluster has
5814  * @inode - file containing the logical cluster
5815  * @lclu - logical cluster of interest
5824 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_clu_mapped()
5826 	int depth, mapped = 0, err = 0;  in ext4_clu_mapped()  local
5832 	 * mapped - no physical clusters have been allocated, and the  in ext4_clu_mapped()
5847 	depth = ext_depth(inode);  in ext4_clu_mapped()
5854 	if (unlikely(path[depth].p_ext == NULL && depth != 0)) {  in ext4_clu_mapped()
5856 		    "bad extent address - lblock: %lu, depth: %d, pblock: %lld",  in ext4_clu_mapped()
5858 				 depth, path[depth].p_block);  in ext4_clu_mapped()
5859 		err = -EFSCORRUPTED;  in ext4_clu_mapped()
5863 	extent = path[depth].p_ext;  in ext4_clu_mapped()
5869 	first_lblk = le32_to_cpu(extent->ee_block);  in ext4_clu_mapped()
5873 	 * Three possible outcomes at this point - found extent spanning  in ext4_clu_mapped()
5880 				     ext4_ext_get_actual_len(extent) - 1);  in ext4_clu_mapped()
5914 	ex = path[path->p_depth].p_ext;  in ext4_ext_replay_update_ex()
5916 		ret = -EFSCORRUPTED;  in ext4_ext_replay_update_ex()
5920 	if (le32_to_cpu(ex->ee_block) != start ||  in ext4_ext_replay_update_ex()
5923 		down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5925 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5932 		ex = path[path->p_depth].p_ext;  in ext4_ext_replay_update_ex()
5933 		WARN_ON(le32_to_cpu(ex->ee_block) != start);  in ext4_ext_replay_update_ex()
5936 			down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5939 			up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5946 			ex = path[path->p_depth].p_ext;  in ext4_ext_replay_update_ex()
5954 	down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5955 	ret = ext4_ext_dirty(NULL, inode, &path[path->p_depth]);  in ext4_ext_replay_update_ex()
5956 	up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5974 		ex = path[path->p_depth].p_ext;  in ext4_ext_replay_shrink_inode()
5981 		cur = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_replay_shrink_inode()
5985 		down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_shrink_inode()
5986 		ext4_ext_dirty(NULL, inode, &path[path->p_depth]);  in ext4_ext_replay_shrink_inode()
5987 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_shrink_inode()
6000 	map.m_len = ((inode->i_size) >> inode->i_sb->s_blocksize_bits) - *cur;  in skip_hole()
6022 	path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL,  in ext4_ext_replay_set_iblocks()
6026 	ex = path[path->p_depth].p_ext;  in ext4_ext_replay_set_iblocks()
6031 	end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_replay_set_iblocks()
6038 		map.m_len = end - cur;  in ext4_ext_replay_set_iblocks()
6061 	numblks += path->p_depth;  in ext4_ext_replay_set_iblocks()
6067 		ex = path[path->p_depth].p_ext;  in ext4_ext_replay_set_iblocks()
6072 		cur = max(cur + 1, le32_to_cpu(ex->ee_block) +  in ext4_ext_replay_set_iblocks()
6084 		for (i = 0; i <= max(path->p_depth, path2->p_depth); i++) {  in ext4_ext_replay_set_iblocks()
6086 			if (i <= path->p_depth)  in ext4_ext_replay_set_iblocks()
6088 					path[i].p_bh->b_blocknr : 0;  in ext4_ext_replay_set_iblocks()
6089 			if (i <= path2->p_depth)  in ext4_ext_replay_set_iblocks()
6091 					path2[i].p_bh->b_blocknr : 0;  in ext4_ext_replay_set_iblocks()
6100 	inode->i_blocks = numblks << (inode->i_sb->s_blocksize_bits - 9);  in ext4_ext_replay_set_iblocks()
6117 	path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL,  in ext4_ext_clear_bb()
6121 	ex = path[path->p_depth].p_ext;  in ext4_ext_clear_bb()
6126 	end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_clear_bb()
6132 		map.m_len = end - cur;  in ext4_ext_clear_bb()
6139 				for (j = 0; j < path->p_depth; j++) {  in ext4_ext_clear_bb()
6141 					ext4_mb_mark_bb(inode->i_sb,  in ext4_ext_clear_bb()
6143 					ext4_fc_record_regions(inode->i_sb, inode->i_ino,  in ext4_ext_clear_bb()
6148 			ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0);  in ext4_ext_clear_bb()
6149 			ext4_fc_record_regions(inode->i_sb, inode->i_ino,  in ext4_ext_clear_bb()