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()
985 	if (unlikely(logical == le32_to_cpu(curp->p_idx->ei_block))) {  in ext4_ext_insert_index()
988 				 logical, le32_to_cpu(curp->p_idx->ei_block));  in ext4_ext_insert_index()
989 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
992 	if (unlikely(le16_to_cpu(curp->p_hdr->eh_entries)  in ext4_ext_insert_index()
993 			     >= le16_to_cpu(curp->p_hdr->eh_max))) {  in ext4_ext_insert_index()
996 				 le16_to_cpu(curp->p_hdr->eh_entries),  in ext4_ext_insert_index()
997 				 le16_to_cpu(curp->p_hdr->eh_max));  in ext4_ext_insert_index()
998 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
1001 	if (logical > le32_to_cpu(curp->p_idx->ei_block)) {  in ext4_ext_insert_index()
1005 		ix = curp->p_idx + 1;  in ext4_ext_insert_index()
1010 		ix = curp->p_idx;  in ext4_ext_insert_index()
1013 	if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) {  in ext4_ext_insert_index()
1015 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
1018 	len = EXT_LAST_INDEX(curp->p_hdr) - ix + 1;  in ext4_ext_insert_index()
1027 	ix->ei_block = cpu_to_le32(logical);  in ext4_ext_insert_index()
1029 	le16_add_cpu(&curp->p_hdr->eh_entries, 1);  in ext4_ext_insert_index()
1031 	if (unlikely(ix > EXT_LAST_INDEX(curp->p_hdr))) {  in ext4_ext_insert_index()
1033 		return -EFSCORRUPTED;  in ext4_ext_insert_index()
1037 	ext4_std_error(inode->i_sb, err);  in ext4_ext_insert_index()
1045  * at depth @at:
1046  * - allocates all needed blocks (new leaf and all intermediate index blocks)
1047  * - makes decision where to split
1048  * - moves remaining extents and index entries (right to the split point)
1050  * - initializes subtree
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()
1079 		return -EFSCORRUPTED;  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()
1087 		border = newext->ee_block;  in ext4_ext_split()
1095 	 * and mark filesystem read-only. index won't  in ext4_ext_split()
1105 	ablocks = kcalloc(depth, sizeof(ext4_fsblk_t), gfp_flags);  in ext4_ext_split()
1107 		return -ENOMEM;  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()
1120 	newblock = ablocks[--a];  in ext4_ext_split()
1123 		err = -EFSCORRUPTED;  in ext4_ext_split()
1126 	bh = sb_getblk_gfp(inode->i_sb, newblock, __GFP_MOVABLE | GFP_NOFS);  in ext4_ext_split()
1128 		err = -ENOMEM;  in ext4_ext_split()
1133 	err = ext4_journal_get_create_access(handle, inode->i_sb, bh,  in ext4_ext_split()
1139 	neh->eh_entries = 0;  in ext4_ext_split()
1140 	neh->eh_max = cpu_to_le16(ext4_ext_space_block(inode, 0));  in ext4_ext_split()
1141 	neh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_split()
1142 	neh->eh_depth = 0;  in ext4_ext_split()
1143 	neh->eh_generation = 0;  in ext4_ext_split()
1145 	/* move remainder of path[depth] to the new leaf */  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()
1151 		err = -EFSCORRUPTED;  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()
1161 		le16_add_cpu(&neh->eh_entries, m);  in ext4_ext_split()
1166 		sizeof(struct ext4_extent) * le16_to_cpu(neh->eh_entries);  in ext4_ext_split()
1167 	memset(bh->b_data + ext_size, 0, inode->i_sb->s_blocksize - ext_size);  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()
1194 		err = -EFSCORRUPTED;  in ext4_ext_split()
1200 	/* current depth stored in i var */  in ext4_ext_split()
1201 	i = depth - 1;  in ext4_ext_split()
1202 	while (k--) {  in ext4_ext_split()
1204 		newblock = ablocks[--a];  in ext4_ext_split()
1205 		bh = sb_getblk(inode->i_sb, newblock);  in ext4_ext_split()
1207 			err = -ENOMEM;  in ext4_ext_split()
1212 		err = ext4_journal_get_create_access(handle, inode->i_sb, bh,  in ext4_ext_split()
1218 		neh->eh_entries = cpu_to_le16(1);  in ext4_ext_split()
1219 		neh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_split()
1220 		neh->eh_max = cpu_to_le16(ext4_ext_space_block_idx(inode, 0));  in ext4_ext_split()
1221 		neh->eh_depth = cpu_to_le16(depth - i);  in ext4_ext_split()
1222 		neh->eh_generation = 0;  in ext4_ext_split()
1224 		fidx->ei_block = border;  in ext4_ext_split()
1227 		ext_debug(inode, "int.index at %d (block %llu): %u -> %llu\n",  in ext4_ext_split()
1235 					 le32_to_cpu(path[i].p_ext->ee_block));  in ext4_ext_split()
1236 			err = -EFSCORRUPTED;  in ext4_ext_split()
1240 		m = EXT_MAX_INDEX(path[i].p_hdr) - path[i].p_idx++;  in ext4_ext_split()
1247 			le16_add_cpu(&neh->eh_entries, m);  in ext4_ext_split()
1251 		   (sizeof(struct ext4_extent) * le16_to_cpu(neh->eh_entries));  in ext4_ext_split()
1252 		memset(bh->b_data + ext_size, 0,  in ext4_ext_split()
1253 			inode->i_sb->s_blocksize - ext_size);  in ext4_ext_split()
1269 			le16_add_cpu(&path[i].p_hdr->eh_entries, -m);  in ext4_ext_split()
1275 		i--;  in ext4_ext_split()
1291 		for (i = 0; i < depth; i++) {  in ext4_ext_split()
1306  * - allocates new block
1307  * - moves top-level data (index block or leaf) into the new block
1308  * - initializes new top-level, creating index that points to the
1317 	struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;  in ext4_ext_grow_indepth()
1324 	if (goal > le32_to_cpu(es->s_first_data_block)) {  in ext4_ext_grow_indepth()
1326 		goal--;  in ext4_ext_grow_indepth()
1334 	bh = sb_getblk_gfp(inode->i_sb, newblock, __GFP_MOVABLE | GFP_NOFS);  in ext4_ext_grow_indepth()
1336 		return -ENOMEM;  in ext4_ext_grow_indepth()
1339 	err = ext4_journal_get_create_access(handle, inode->i_sb, bh,  in ext4_ext_grow_indepth()
1346 	ext_size = sizeof(EXT4_I(inode)->i_data);  in ext4_ext_grow_indepth()
1347 	/* move top-level index/leaf into new block */  in ext4_ext_grow_indepth()
1348 	memmove(bh->b_data, EXT4_I(inode)->i_data, ext_size);  in ext4_ext_grow_indepth()
1350 	memset(bh->b_data + ext_size, 0, inode->i_sb->s_blocksize - ext_size);  in ext4_ext_grow_indepth()
1357 		neh->eh_max = cpu_to_le16(ext4_ext_space_block_idx(inode, 0));  in ext4_ext_grow_indepth()
1359 		neh->eh_max = cpu_to_le16(ext4_ext_space_block(inode, 0));  in ext4_ext_grow_indepth()
1360 	neh->eh_magic = EXT4_EXT_MAGIC;  in ext4_ext_grow_indepth()
1370 	/* Update top-level index: num,max,pointer */  in ext4_ext_grow_indepth()
1372 	neh->eh_entries = cpu_to_le16(1);  in ext4_ext_grow_indepth()
1374 	if (neh->eh_depth == 0) {  in ext4_ext_grow_indepth()
1376 		neh->eh_max = cpu_to_le16(ext4_ext_space_root_idx(inode, 0));  in ext4_ext_grow_indepth()
1377 		EXT_FIRST_INDEX(neh)->ei_block =  in ext4_ext_grow_indepth()
1378 			EXT_FIRST_EXTENT(neh)->ee_block;  in ext4_ext_grow_indepth()
1381 		  le16_to_cpu(neh->eh_entries), le16_to_cpu(neh->eh_max),  in ext4_ext_grow_indepth()
1382 		  le32_to_cpu(EXT_FIRST_INDEX(neh)->ei_block),  in ext4_ext_grow_indepth()
1385 	le16_add_cpu(&neh->eh_depth, 1);  in ext4_ext_grow_indepth()
1396  * if no free index is found, then it requests in-depth growing.
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()
1414 		i--;  in ext4_ext_create_new_leaf()
1415 		curp--;  in ext4_ext_create_new_leaf()
1429 				    (ext4_lblk_t)le32_to_cpu(newext->ee_block),  in ext4_ext_create_new_leaf()
1434 		/* tree is full, time to grow in depth */  in ext4_ext_create_new_leaf()
1441 				   (ext4_lblk_t)le32_to_cpu(newext->ee_block),  in ext4_ext_create_new_leaf()
1449 		 * only first (depth 0 -> 1) produces free space;  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
1480 		return -EFSCORRUPTED;  in ext4_ext_search_left()
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()
1494 	if (*logical < le32_to_cpu(ex->ee_block)) {  in ext4_ext_search_left()
1495 		if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) {  in ext4_ext_search_left()
1498 					 *logical, le32_to_cpu(ex->ee_block));  in ext4_ext_search_left()
1499 			return -EFSCORRUPTED;  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()
1505 				  "ix (%d) != EXT_FIRST_INDEX (%d) (depth %d)!",  in ext4_ext_search_left()
1506 				  ix != NULL ? le32_to_cpu(ix->ei_block) : 0,  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()
1509 				return -EFSCORRUPTED;  in ext4_ext_search_left()
1515 	if (unlikely(*logical < (le32_to_cpu(ex->ee_block) + ee_len))) {  in ext4_ext_search_left()
1518 				 *logical, le32_to_cpu(ex->ee_block), ee_len);  in ext4_ext_search_left()
1519 		return -EFSCORRUPTED;  in ext4_ext_search_left()
1522 	*logical = le32_to_cpu(ex->ee_block) + ee_len - 1;  in ext4_ext_search_left()
1523 	*phys = ext4_ext_pblock(ex) + ee_len - 1;  in ext4_ext_search_left()
1543 	int depth;	/* Note, NOT eh_depth; depth from top of tree */  in ext4_ext_search_right()  local
1548 		return -EFSCORRUPTED;  in ext4_ext_search_right()
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()
1562 	if (*logical < le32_to_cpu(ex->ee_block)) {  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()
1567 			return -EFSCORRUPTED;  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()
1575 				return -EFSCORRUPTED;  in ext4_ext_search_right()
1581 	if (unlikely(*logical < (le32_to_cpu(ex->ee_block) + ee_len))) {  in ext4_ext_search_right()
1584 				 *logical, le32_to_cpu(ex->ee_block), ee_len);  in ext4_ext_search_right()
1585 		return -EFSCORRUPTED;  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()
1625 	*logical = le32_to_cpu(ex->ee_block);  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()
1657 			if (p->p_ext && p->p_ext != EXT_LAST_EXTENT(p->p_hdr))  in ext4_ext_next_allocated_block()
1658 				return le32_to_cpu(p->p_ext[1].ee_block);  in ext4_ext_next_allocated_block()
1661 			if (p->p_idx != EXT_LAST_INDEX(p->p_hdr))  in ext4_ext_next_allocated_block()
1662 				return le32_to_cpu(p->p_idx[1].ei_block);  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()
1681 	/* zero-tree has no leaf blocks at all */  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()
1720 		return -EFSCORRUPTED;  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()
1741 	path[k].p_idx->ei_block = border;  in ext4_ext_correct_indexes()
1746 	while (k--) {  in ext4_ext_correct_indexes()
1747 		/* change all left-side indexes */  in ext4_ext_correct_indexes()
1753 		path[k].p_idx->ei_block = border;  in ext4_ext_correct_indexes()
1774 	if (le32_to_cpu(ex1->ee_block) + ext1_ee_len !=  in ext4_can_extents_be_merged()
1775 			le32_to_cpu(ex2->ee_block))  in ext4_can_extents_be_merged()
1797  * left, pass "ex - 1" as argument instead of "ex".
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()
1818 		ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)  in ext4_ext_try_to_merge_right()
1824 			len = (EXT_LAST_EXTENT(eh) - ex - 1)  in ext4_ext_try_to_merge_right()
1828 		le16_add_cpu(&eh->eh_entries, -1);  in ext4_ext_try_to_merge_right()
1830 		WARN_ON(eh->eh_entries == 0);  in ext4_ext_try_to_merge_right()
1831 		if (!eh->eh_entries)  in ext4_ext_try_to_merge_right()
1832 			EXT4_ERROR_INODE(inode, "eh->eh_entries = 0!");  in ext4_ext_try_to_merge_right()
1851 	    (le16_to_cpu(path[0].p_hdr->eh_entries) != 1) ||  in ext4_ext_try_to_merge_up()
1852 	    (le16_to_cpu(path[1].p_hdr->eh_entries) > max_root))  in ext4_ext_try_to_merge_up()
1861 			ext4_free_metadata_revoke_credits(inode->i_sb, 1)))  in ext4_ext_try_to_merge_up()
1868 	s = le16_to_cpu(path[1].p_hdr->eh_entries) *  in ext4_ext_try_to_merge_up()
1876 		(path[1].p_ext - EXT_FIRST_EXTENT(path[1].p_hdr));  in ext4_ext_try_to_merge_up()
1877 	path[0].p_hdr->eh_max = cpu_to_le16(max_root);  in ext4_ext_try_to_merge_up()
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()
1902 		merge_done = ext4_ext_try_to_merge_right(inode, path, ex - 1);  in ext4_ext_try_to_merge()
1924 	unsigned int depth, len1;  in ext4_ext_check_overlap()  local
1927 	b1 = le32_to_cpu(newext->ee_block);  in ext4_ext_check_overlap()
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()
1947 		len1 = EXT_MAX_BLOCKS - b1;  in ext4_ext_check_overlap()
1948 		newext->ee_len = cpu_to_le16(len1);  in ext4_ext_check_overlap()
1954 		newext->ee_len = cpu_to_le16(b2 - b1);  in ext4_ext_check_overlap()
1965  * creating new leaf in the no-space case.
1976 	int depth, len, err;  in ext4_ext_insert_extent()  local
1984 		return -EFSCORRUPTED;  in ext4_ext_insert_extent()
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()
1991 		return -EFSCORRUPTED;  in ext4_ext_insert_extent()
2005 		    (le32_to_cpu(ex->ee_block) +  in ext4_ext_insert_extent()
2007 		    le32_to_cpu(newext->ee_block))) {  in ext4_ext_insert_extent()
2011 			   (le32_to_cpu(newext->ee_block) +  in ext4_ext_insert_extent()
2013 			   le32_to_cpu(ex->ee_block)))  in ext4_ext_insert_extent()
2014 			ex -= 1;  in ext4_ext_insert_extent()
2022 				  le32_to_cpu(ex->ee_block),  in ext4_ext_insert_extent()
2027 						  path + depth);  in ext4_ext_insert_extent()
2031 			ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)  in ext4_ext_insert_extent()
2044 				  le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2047 				  le32_to_cpu(ex->ee_block),  in ext4_ext_insert_extent()
2052 						  path + depth);  in ext4_ext_insert_extent()
2057 			ex->ee_block = newext->ee_block;  in ext4_ext_insert_extent()
2059 			ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)  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()
2070 	if (le16_to_cpu(eh->eh_entries) < le16_to_cpu(eh->eh_max))  in ext4_ext_insert_extent()
2076 	if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block))  in ext4_ext_insert_extent()
2079 		ext_debug(inode, "next leaf block - %u\n", next);  in ext4_ext_insert_extent()
2084 		BUG_ON(npath->p_depth != path->p_depth);  in ext4_ext_insert_extent()
2085 		eh = npath[depth].p_hdr;  in ext4_ext_insert_extent()
2086 		if (le16_to_cpu(eh->eh_entries) < le16_to_cpu(eh->eh_max)) {  in ext4_ext_insert_extent()
2088 				  le16_to_cpu(eh->eh_entries));  in ext4_ext_insert_extent()
2093 			  le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));  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()
2119 				le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2125 		if (le32_to_cpu(newext->ee_block)  in ext4_ext_insert_extent()
2126 			   > le32_to_cpu(nearex->ee_block)) {  in ext4_ext_insert_extent()
2130 					le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2138 			BUG_ON(newext->ee_block == nearex->ee_block);  in ext4_ext_insert_extent()
2141 					le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2147 		len = EXT_LAST_EXTENT(eh) - nearex + 1;  in ext4_ext_insert_extent()
2151 					le32_to_cpu(newext->ee_block),  in ext4_ext_insert_extent()
2161 	le16_add_cpu(&eh->eh_entries, 1);  in ext4_ext_insert_extent()
2162 	path[depth].p_ext = nearex;  in ext4_ext_insert_extent()
2163 	nearex->ee_block = newext->ee_block;  in ext4_ext_insert_extent()
2165 	nearex->ee_len = newext->ee_len;  in ext4_ext_insert_extent()
2178 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_ext_insert_extent()
2189 	ext4_lblk_t next, end = block + num - 1;  in ext4_fill_es_cache_info()
2191 	unsigned char blksize_bits = inode->i_sb->s_blocksize_bits;  in ext4_fill_es_cache_info()
2232  * ext4_ext_find_hole - find hole around given block according to the given path
2248 	int depth = ext_depth(inode);  in ext4_ext_find_hole()  local
2252 	ex = path[depth].p_ext;  in ext4_ext_find_hole()
2254 		/* there is no extent yet, so gap is [0;-] */  in ext4_ext_find_hole()
2257 	} else if (*lblk < le32_to_cpu(ex->ee_block)) {  in ext4_ext_find_hole()
2258 		len = le32_to_cpu(ex->ee_block) - *lblk;  in ext4_ext_find_hole()
2259 	} else if (*lblk >= le32_to_cpu(ex->ee_block)  in ext4_ext_find_hole()
2263 		*lblk = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_find_hole()
2266 		len = next - *lblk;  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()
2286 	leaf = ext4_idx_pblock(path->p_idx);  in ext4_ext_rm_idx()
2287 	if (unlikely(path->p_hdr->eh_entries == 0)) {  in ext4_ext_rm_idx()
2288 		EXT4_ERROR_INODE(inode, "path->p_hdr->eh_entries == 0");  in ext4_ext_rm_idx()
2289 		return -EFSCORRUPTED;  in ext4_ext_rm_idx()
2295 	if (path->p_idx != EXT_LAST_INDEX(path->p_hdr)) {  in ext4_ext_rm_idx()
2296 		int len = EXT_LAST_INDEX(path->p_hdr) - path->p_idx;  in ext4_ext_rm_idx()
2298 		memmove(path->p_idx, path->p_idx + 1, len);  in ext4_ext_rm_idx()
2301 	le16_add_cpu(&path->p_hdr->eh_entries, -1);  in ext4_ext_rm_idx()
2311 	while (--depth >= 0) {  in ext4_ext_rm_idx()
2312 		if (path->p_idx != EXT_FIRST_INDEX(path->p_hdr))  in ext4_ext_rm_idx()
2314 		path--;  in ext4_ext_rm_idx()
2318 		path->p_idx->ei_block = (path+1)->p_idx->ei_block;  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()
2353 			ret = 2 + EXT4_META_TRANS_BLOCKS(inode->i_sb);  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()
2391 	if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode) ||  in get_default_free_blocks_flags()
2400  * ext4_rereserve_cluster - increment the reserved cluster count when
2403  * @inode - file containing the cluster
2404  * @lblk - logical block in cluster to be reserved
2416 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_rereserve_cluster()
2421 	spin_lock(&ei->i_block_reservation_lock);  in ext4_rereserve_cluster()
2422 	ei->i_reserved_data_blocks++;  in ext4_rereserve_cluster()
2423 	percpu_counter_add(&sbi->s_dirtyclusters_counter, 1);  in ext4_rereserve_cluster()
2424 	spin_unlock(&ei->i_block_reservation_lock);  in ext4_rereserve_cluster()
2426 	percpu_counter_add(&sbi->s_freeclusters_counter, 1);  in ext4_rereserve_cluster()
2435 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_remove_blocks()
2442 	if (from < le32_to_cpu(ex->ee_block) ||  in ext4_remove_blocks()
2443 	    to != le32_to_cpu(ex->ee_block) + ee_len - 1) {  in ext4_remove_blocks()
2444 		ext4_error(sbi->s_sb,  in ext4_remove_blocks()
2445 			   "strange request: removal(2) %u-%u from %u:%u",  in ext4_remove_blocks()
2446 			   from, to, le32_to_cpu(ex->ee_block), ee_len);  in ext4_remove_blocks()
2451 	spin_lock(&sbi->s_ext_stats_lock);  in ext4_remove_blocks()
2452 	sbi->s_ext_blocks += ee_len;  in ext4_remove_blocks()
2453 	sbi->s_ext_extents++;  in ext4_remove_blocks()
2454 	if (ee_len < sbi->s_ext_min)  in ext4_remove_blocks()
2455 		sbi->s_ext_min = ee_len;  in ext4_remove_blocks()
2456 	if (ee_len > sbi->s_ext_max)  in ext4_remove_blocks()
2457 		sbi->s_ext_max = ee_len;  in ext4_remove_blocks()
2458 	if (ext_depth(inode) > sbi->s_depth_max)  in ext4_remove_blocks()
2459 		sbi->s_depth_max = ext_depth(inode);  in ext4_remove_blocks()
2460 	spin_unlock(&sbi->s_ext_stats_lock);  in ext4_remove_blocks()
2469 	last_pblk = ext4_ext_pblock(ex) + ee_len - 1;  in ext4_remove_blocks()
2471 	if (partial->state != initial &&  in ext4_remove_blocks()
2472 	    partial->pclu != EXT4_B2C(sbi, last_pblk)) {  in ext4_remove_blocks()
2473 		if (partial->state == tofree) {  in ext4_remove_blocks()
2475 			if (ext4_is_pending(inode, partial->lblk))  in ext4_remove_blocks()
2478 					 EXT4_C2B(sbi, partial->pclu),  in ext4_remove_blocks()
2479 					 sbi->s_cluster_ratio, flags);  in ext4_remove_blocks()
2481 				ext4_rereserve_cluster(inode, partial->lblk);  in ext4_remove_blocks()
2483 		partial->state = initial;  in ext4_remove_blocks()
2486 	num = le32_to_cpu(ex->ee_block) + ee_len - from;  in ext4_remove_blocks()
2487 	pblk = ext4_ext_pblock(ex) + ee_len - num;  in ext4_remove_blocks()
2498 	if ((EXT4_LBLK_COFF(sbi, to) != sbi->s_cluster_ratio - 1) &&  in ext4_remove_blocks()
2500 	    (partial->state != nofree)) {  in ext4_remove_blocks()
2505 				 sbi->s_cluster_ratio, flags);  in ext4_remove_blocks()
2508 		partial->state = initial;  in ext4_remove_blocks()
2524 	if (partial->state != initial && partial->pclu != EXT4_B2C(sbi, pblk))  in ext4_remove_blocks()
2525 		partial->state = initial;  in ext4_remove_blocks()
2534 	 * cluster - we're either  done freeing or the beginning of the  in ext4_remove_blocks()
2538 		if (partial->state == initial) {  in ext4_remove_blocks()
2539 			partial->pclu = EXT4_B2C(sbi, pblk);  in ext4_remove_blocks()
2540 			partial->lblk = from;  in ext4_remove_blocks()
2541 			partial->state = tofree;  in ext4_remove_blocks()
2544 		partial->state = initial;  in ext4_remove_blocks()
2571 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_ext_rm_leaf()
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()
2590 		return -EFSCORRUPTED;  in ext4_ext_rm_leaf()
2593 	ex = path[depth].p_ext;  in ext4_ext_rm_leaf()
2597 	ex_ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_rm_leaf()
2612 		path[depth].p_ext = ex;  in ext4_ext_rm_leaf()
2615 		b = min(ex_ee_block + ex_ee_len - 1, end);  in ext4_ext_rm_leaf()
2628 			if (sbi->s_cluster_ratio > 1) {  in ext4_ext_rm_leaf()
2630 				partial->pclu = EXT4_B2C(sbi, pblk);  in ext4_ext_rm_leaf()
2631 				partial->state = nofree;  in ext4_ext_rm_leaf()
2633 			ex--;  in ext4_ext_rm_leaf()
2634 			ex_ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_rm_leaf()
2637 		} else if (b != ex_ee_block + ex_ee_len - 1) {  in ext4_ext_rm_leaf()
2642 					 ex_ee_block + ex_ee_len - 1);  in ext4_ext_rm_leaf()
2643 			err = -EFSCORRUPTED;  in ext4_ext_rm_leaf()
2647 			num = a - ex_ee_block;  in ext4_ext_rm_leaf()
2658 		credits = 7 + 2*(ex_ee_len/EXT4_BLOCKS_PER_GROUP(inode->i_sb));  in ext4_ext_rm_leaf()
2663 		credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);  in ext4_ext_rm_leaf()
2670 			ext4_free_metadata_revoke_credits(inode->i_sb,  in ext4_ext_rm_leaf()
2672 			ext4_free_data_revoke_credits(inode, b - a + 1);  in ext4_ext_rm_leaf()
2678 				err = -EAGAIN;  in ext4_ext_rm_leaf()
2682 		err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_rm_leaf()
2694 		ex->ee_len = cpu_to_le16(num);  in ext4_ext_rm_leaf()
2706 			if (end != EXT_MAX_BLOCKS - 1) {  in ext4_ext_rm_leaf()
2712 				memmove(ex, ex+1, (EXT_LAST_EXTENT(eh) - ex) *  in ext4_ext_rm_leaf()
2719 			le16_add_cpu(&eh->eh_entries, -1);  in ext4_ext_rm_leaf()
2722 		err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_ext_rm_leaf()
2728 		ex--;  in ext4_ext_rm_leaf()
2729 		ex_ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_rm_leaf()
2733 	if (correct_index && eh->eh_entries)  in ext4_ext_rm_leaf()
2743 	if (partial->state == tofree && ex >= EXT_FIRST_EXTENT(eh)) {  in ext4_ext_rm_leaf()
2744 		pblk = ext4_ext_pblock(ex) + ex_ee_len - 1;  in ext4_ext_rm_leaf()
2745 		if (partial->pclu != EXT4_B2C(sbi, pblk)) {  in ext4_ext_rm_leaf()
2748 			if (ext4_is_pending(inode, partial->lblk))  in ext4_ext_rm_leaf()
2751 					 EXT4_C2B(sbi, partial->pclu),  in ext4_ext_rm_leaf()
2752 					 sbi->s_cluster_ratio, flags);  in ext4_ext_rm_leaf()
2754 				ext4_rereserve_cluster(inode, partial->lblk);  in ext4_ext_rm_leaf()
2756 		partial->state = initial;  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()
2775 	BUG_ON(path->p_idx == NULL);  in ext4_ext_more_to_rm()
2777 	if (path->p_idx < EXT_FIRST_INDEX(path->p_hdr))  in ext4_ext_more_to_rm()
2784 	if (le16_to_cpu(path->p_hdr->eh_entries) == path->p_block)  in ext4_ext_more_to_rm()
2792 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_ext_remove_space()
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()
2822 	if (end < EXT_MAX_BLOCKS - 1) {  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()
2842 				err = -EFSCORRUPTED;  in ext4_ext_remove_space()
2847 		ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_remove_space()
2848 		ex_end = ee_block + ext4_ext_get_actual_len(ex) - 1;  in ext4_ext_remove_space()
2863 			if (sbi->s_cluster_ratio > 1) {  in ext4_ext_remove_space()
2864 				pblk = ext4_ext_pblock(ex) + end - ee_block + 1;  in ext4_ext_remove_space()
2880 		} else if (sbi->s_cluster_ratio > 1 && end >= ex_end &&  in ext4_ext_remove_space()
2905 	 * after i_size and walking into the tree depth-wise.  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()
2910 		while (--k > 0)  in ext4_ext_remove_space()
2912 				le16_to_cpu(path[k].p_hdr->eh_entries)+1;  in ext4_ext_remove_space()
2914 		path = kcalloc(depth + 1, sizeof(struct ext4_ext_path),  in ext4_ext_remove_space()
2918 			return -ENOMEM;  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()
2925 			err = -EFSCORRUPTED;  in ext4_ext_remove_space()
2932 		if (i == depth) {  in ext4_ext_remove_space()
2939 			i--;  in ext4_ext_remove_space()
2952 			path[i].p_block = le16_to_cpu(path[i].p_hdr->eh_entries)+1;  in ext4_ext_remove_space()
2955 				  le16_to_cpu(path[i].p_hdr->eh_entries));  in ext4_ext_remove_space()
2958 			path[i].p_idx--;  in ext4_ext_remove_space()
2961 		ext_debug(inode, "level %d - index, first 0x%p, cur 0x%p\n",  in ext4_ext_remove_space()
2971 						    depth - i - 1,  in ext4_ext_remove_space()
2979 			 * Should be a no-op if we did IO above. */  in ext4_ext_remove_space()
2981 			if (WARN_ON(i + 1 > depth)) {  in ext4_ext_remove_space()
2982 				err = -EFSCORRUPTED;  in ext4_ext_remove_space()
2989 			path[i].p_block = le16_to_cpu(path[i].p_hdr->eh_entries);  in ext4_ext_remove_space()
2993 			if (path[i].p_hdr->eh_entries == 0 && i > 0) {  in ext4_ext_remove_space()
3002 			i--;  in ext4_ext_remove_space()
3007 	trace_ext4_ext_remove_space_done(inode, start, end, depth, &partial,  in ext4_ext_remove_space()
3008 					 path->p_hdr->eh_entries);  in ext4_ext_remove_space()
3021 				 sbi->s_cluster_ratio, flags);  in ext4_ext_remove_space()
3028 	if (path->p_hdr->eh_entries == 0) {  in ext4_ext_remove_space()
3035 			ext_inode_hdr(inode)->eh_depth = 0;  in ext4_ext_remove_space()
3036 			ext_inode_hdr(inode)->eh_max =  in ext4_ext_remove_space()
3044 	if (err == -EAGAIN)  in ext4_ext_remove_space()
3062 		printk(KERN_INFO "EXT4-fs: file extents enabled"  in ext4_ext_init()
3075 		spin_lock_init(&EXT4_SB(sb)->s_ext_stats_lock);  in ext4_ext_init()
3076 		EXT4_SB(sb)->s_ext_min = 1 << 30;  in ext4_ext_init()
3077 		EXT4_SB(sb)->s_ext_max = 0;  in ext4_ext_init()
3091 	if (EXT4_SB(sb)->s_ext_blocks && EXT4_SB(sb)->s_ext_extents) {  in ext4_ext_release()
3093 		printk(KERN_ERR "EXT4-fs: %lu blocks in %lu extents (%lu ave)\n",  in ext4_ext_release()
3094 			sbi->s_ext_blocks, sbi->s_ext_extents,  in ext4_ext_release()
3095 			sbi->s_ext_blocks / sbi->s_ext_extents);  in ext4_ext_release()
3096 		printk(KERN_ERR "EXT4-fs: extents: %lu min, %lu max, max depth %lu\n",  in ext4_ext_release()
3097 			sbi->s_ext_min, sbi->s_ext_max, sbi->s_depth_max);  in ext4_ext_release()
3108 	ee_block  = le32_to_cpu(ex->ee_block);  in ext4_zeroout_es()
3119 /* FIXME!! we need to try to merge to left or right after zero-out  */
3127 	return ext4_issue_zeroout(inode, le32_to_cpu(ex->ee_block), ee_pblock,  in ext4_ext_zeroout()
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()
3176 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_split_extent_at()
3178 	newblock = split - ee_block + ext4_ext_pblock(ex);  in ext4_split_extent_at()
3186 	err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_split_extent_at()
3204 		err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_split_extent_at()
3210 	ex->ee_len = cpu_to_le16(split - ee_block);  in ext4_split_extent_at()
3218 	err = ext4_ext_dirty(handle, inode, path + depth);  in ext4_split_extent_at()
3223 	ex2->ee_block = cpu_to_le32(split);  in ext4_split_extent_at()
3224 	ex2->ee_len   = cpu_to_le16(ee_len - (split - ee_block));  in ext4_split_extent_at()
3230 	if (err != -ENOSPC && err != -EDQUOT && err != -ENOMEM)  in ext4_split_extent_at()
3237 				zero_ex.ee_block = ex2->ee_block;  in ext4_split_extent_at()
3244 				zero_ex.ee_block = ex->ee_block;  in ext4_split_extent_at()
3261 			ex->ee_len = cpu_to_le16(ee_len);  in ext4_split_extent_at()
3263 			err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_split_extent_at()
3277 	ex->ee_len = orig_ex.ee_len;  in ext4_split_extent_at()
3280 	 * and err is a non-zero error code.  in ext4_split_extent_at()
3282 	ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_split_extent_at()
3310 	unsigned int ee_len, depth;  in ext4_split_extent()  local
3314 	int allocated = map->m_len;  in ext4_split_extent()
3316 	depth = ext_depth(inode);  in ext4_split_extent()
3317 	ex = path[depth].p_ext;  in ext4_split_extent()
3318 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_split_extent()
3322 	if (map->m_lblk + map->m_len < ee_block + ee_len) {  in ext4_split_extent()
3331 				map->m_lblk + map->m_len, split_flag1, flags1);  in ext4_split_extent()
3335 		allocated = ee_len - (map->m_lblk - ee_block);  in ext4_split_extent()
3341 	path = ext4_find_extent(inode, map->m_lblk, ppath, flags);  in ext4_split_extent()
3344 	depth = ext_depth(inode);  in ext4_split_extent()
3345 	ex = path[depth].p_ext;  in ext4_split_extent()
3348 				 (unsigned long) map->m_lblk);  in ext4_split_extent()
3349 		return -EFSCORRUPTED;  in ext4_split_extent()
3353 	if (map->m_lblk >= ee_block) {  in ext4_split_extent()
3361 				map->m_lblk, split_flag1, flags);  in ext4_split_extent()
3374  * extent into multiple extents (up to three - one initialized and two
3381  * Pre-conditions:
3382  *  - The extent pointed to by 'path' is unwritten.
3383  *  - The extent pointed to by 'path' contains a superset
3384  *    of the logical span [map->m_lblk, map->m_lblk + map->m_len).
3386  * Post-conditions on success:
3387  *  - the returned value is the number of blocks beyond map->l_lblk
3389  *    It is guaranteed to be >= map->m_len.
3404 	unsigned int ee_len, depth, map_len = map->m_len;  in ext4_ext_convert_to_initialized()  local
3410 		  (unsigned long long)map->m_lblk, map_len);  in ext4_ext_convert_to_initialized()
3412 	sbi = EXT4_SB(inode->i_sb);  in ext4_ext_convert_to_initialized()
3413 	eof_block = (EXT4_I(inode)->i_disksize + inode->i_sb->s_blocksize - 1)  in ext4_ext_convert_to_initialized()
3414 			>> inode->i_sb->s_blocksize_bits;  in ext4_ext_convert_to_initialized()
3415 	if (eof_block < map->m_lblk + map_len)  in ext4_ext_convert_to_initialized()
3416 		eof_block = map->m_lblk + map_len;  in ext4_ext_convert_to_initialized()
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()
3421 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_convert_to_initialized()
3428 	/* Pre-conditions */  in ext4_ext_convert_to_initialized()
3430 	BUG_ON(!in_range(map->m_lblk, ee_block, ee_len));  in ext4_ext_convert_to_initialized()
3441 	 *  - L1: we do not deal with writes covering the whole extent.  in ext4_ext_convert_to_initialized()
3444 	 *  - L2: we only attempt to merge with an extent stored in the  in ext4_ext_convert_to_initialized()
3447 	if ((map->m_lblk == ee_block) &&  in ext4_ext_convert_to_initialized()
3455 		abut_ex = ex - 1;  in ext4_ext_convert_to_initialized()
3456 		prev_lblk = le32_to_cpu(abut_ex->ee_block);  in ext4_ext_convert_to_initialized()
3464 		 * - C1: abut_ex is initialized,  in ext4_ext_convert_to_initialized()
3465 		 * - C2: abut_ex is logically abutting ex,  in ext4_ext_convert_to_initialized()
3466 		 * - C3: abut_ex is physically abutting ex,  in ext4_ext_convert_to_initialized()
3467 		 * - C4: abut_ex can receive the additional blocks without  in ext4_ext_convert_to_initialized()
3473 			(prev_len < (EXT_INIT_MAX_LEN - map_len))) {	/*C4*/  in ext4_ext_convert_to_initialized()
3474 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3482 			ex->ee_block = cpu_to_le32(ee_block + map_len);  in ext4_ext_convert_to_initialized()
3484 			ex->ee_len = cpu_to_le16(ee_len - map_len);  in ext4_ext_convert_to_initialized()
3488 			abut_ex->ee_len = cpu_to_le16(prev_len + map_len);  in ext4_ext_convert_to_initialized()
3493 	} else if (((map->m_lblk + map_len) == (ee_block + ee_len)) &&  in ext4_ext_convert_to_initialized()
3502 		next_lblk = le32_to_cpu(abut_ex->ee_block);  in ext4_ext_convert_to_initialized()
3510 		 * - C1: abut_ex is initialized,  in ext4_ext_convert_to_initialized()
3511 		 * - C2: abut_ex is logically abutting ex,  in ext4_ext_convert_to_initialized()
3512 		 * - C3: abut_ex is physically abutting ex,  in ext4_ext_convert_to_initialized()
3513 		 * - C4: abut_ex can receive the additional blocks without  in ext4_ext_convert_to_initialized()
3517 		    ((map->m_lblk + map_len) == next_lblk) &&		/*C2*/  in ext4_ext_convert_to_initialized()
3519 		    (next_len < (EXT_INIT_MAX_LEN - map_len))) {	/*C4*/  in ext4_ext_convert_to_initialized()
3520 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_convert_to_initialized()
3528 			abut_ex->ee_block = cpu_to_le32(next_lblk - map_len);  in ext4_ext_convert_to_initialized()
3529 			ext4_ext_store_pblock(abut_ex, next_pblk - map_len);  in ext4_ext_convert_to_initialized()
3530 			ex->ee_len = cpu_to_le16(ee_len - map_len);  in ext4_ext_convert_to_initialized()
3534 			abut_ex->ee_len = cpu_to_le16(next_len + map_len);  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()
3548 		allocated = ee_len - (map->m_lblk - ee_block);  in ext4_ext_convert_to_initialized()
3550 	WARN_ON(map->m_lblk < ee_block);  in ext4_ext_convert_to_initialized()
3558 		max_zeroout = sbi->s_extent_max_zeroout_kb >>  in ext4_ext_convert_to_initialized()
3559 			(inode->i_sb->s_blocksize_bits - 10);  in ext4_ext_convert_to_initialized()
3572 	split_map.m_lblk = map->m_lblk;  in ext4_ext_convert_to_initialized()
3573 	split_map.m_len = map->m_len;  in ext4_ext_convert_to_initialized()
3582 				cpu_to_le16(allocated - split_map.m_len);  in ext4_ext_convert_to_initialized()
3585 				split_map.m_len - ee_block);  in ext4_ext_convert_to_initialized()
3591 		if (split_map.m_lblk - ee_block + split_map.m_len <  in ext4_ext_convert_to_initialized()
3595 				zero_ex2.ee_block = ex->ee_block;  in ext4_ext_convert_to_initialized()
3596 				zero_ex2.ee_len = cpu_to_le16(split_map.m_lblk -  in ext4_ext_convert_to_initialized()
3605 			split_map.m_len += split_map.m_lblk - ee_block;  in ext4_ext_convert_to_initialized()
3607 			allocated = map->m_len;  in ext4_ext_convert_to_initialized()
3637  * This works the same way in the case of initialized -> unwritten conversion.
3660 	int split_flag = 0, depth;  in ext4_split_convert_extents()  local
3663 		  (unsigned long long)map->m_lblk, map->m_len);  in ext4_split_convert_extents()
3665 	eof_block = (EXT4_I(inode)->i_disksize + inode->i_sb->s_blocksize - 1)  in ext4_split_convert_extents()
3666 			>> inode->i_sb->s_blocksize_bits;  in ext4_split_convert_extents()
3667 	if (eof_block < map->m_lblk + map->m_len)  in ext4_split_convert_extents()
3668 		eof_block = map->m_lblk + map->m_len;  in ext4_split_convert_extents()
3673 	depth = ext_depth(inode);  in ext4_split_convert_extents()
3674 	ex = path[depth].p_ext;  in ext4_split_convert_extents()
3675 	ee_block = le32_to_cpu(ex->ee_block);  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()
3705 	ee_block = le32_to_cpu(ex->ee_block);  in ext4_convert_unwritten_extents_endio()
3717 	if (ee_block != map->m_lblk || ee_len > map->m_len) {  in ext4_convert_unwritten_extents_endio()
3719 		ext4_warning(inode->i_sb, "Inode (%ld) finished: extent logical block %llu,"  in ext4_convert_unwritten_extents_endio()
3721 			     inode->i_ino, (unsigned long long)ee_block, ee_len,  in ext4_convert_unwritten_extents_endio()
3722 			     (unsigned long long)map->m_lblk, map->m_len);  in ext4_convert_unwritten_extents_endio()
3728 		path = ext4_find_extent(inode, map->m_lblk, ppath, 0);  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()
3747 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in ext4_convert_unwritten_extents_endio()
3763 	int depth;  in convert_initialized_extent()  local
3770 	if (map->m_len > EXT_UNWRITTEN_MAX_LEN)  in convert_initialized_extent()
3771 		map->m_len = EXT_UNWRITTEN_MAX_LEN / 2;  in convert_initialized_extent()
3773 	depth = ext_depth(inode);  in convert_initialized_extent()
3774 	ex = path[depth].p_ext;  in convert_initialized_extent()
3775 	ee_block = le32_to_cpu(ex->ee_block);  in convert_initialized_extent()
3781 	if (ee_block != map->m_lblk || ee_len > map->m_len) {  in convert_initialized_extent()
3786 		path = ext4_find_extent(inode, map->m_lblk, ppath, 0);  in convert_initialized_extent()
3789 		depth = ext_depth(inode);  in convert_initialized_extent()
3790 		ex = path[depth].p_ext;  in convert_initialized_extent()
3793 					 (unsigned long) map->m_lblk);  in convert_initialized_extent()
3794 			return -EFSCORRUPTED;  in convert_initialized_extent()
3798 	err = ext4_ext_get_access(handle, inode, path + depth);  in convert_initialized_extent()
3810 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);  in convert_initialized_extent()
3817 	map->m_flags |= EXT4_MAP_UNWRITTEN;  in convert_initialized_extent()
3818 	if (*allocated > map->m_len)  in convert_initialized_extent()
3819 		*allocated = map->m_len;  in convert_initialized_extent()
3820 	map->m_len = *allocated;  in convert_initialized_extent()
3835 		  (unsigned long long)map->m_lblk, map->m_len, flags,  in ext4_ext_handle_unwritten_extents()
3863 					 map->m_len);  in ext4_ext_handle_unwritten_extents()
3864 			err = -EFSCORRUPTED;  in ext4_ext_handle_unwritten_extents()
3867 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_handle_unwritten_extents()
3885 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_handle_unwritten_extents()
3898 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_handle_unwritten_extents()
3919 				 map->m_len);  in ext4_ext_handle_unwritten_extents()
3920 		err = -EFSCORRUPTED;  in ext4_ext_handle_unwritten_extents()
3926 	map->m_flags |= EXT4_MAP_NEW;  in ext4_ext_handle_unwritten_extents()
3928 	map->m_flags |= EXT4_MAP_MAPPED;  in ext4_ext_handle_unwritten_extents()
3930 	map->m_pblk = newblock;  in ext4_ext_handle_unwritten_extents()
3931 	if (allocated > map->m_len)  in ext4_ext_handle_unwritten_extents()
3932 		allocated = map->m_len;  in ext4_ext_handle_unwritten_extents()
3933 	map->m_len = allocated;  in ext4_ext_handle_unwritten_extents()
3940  * get_implied_cluster_alloc - check to see if the requested
3944  *	@map	The requested lblk->pblk mapping
3954  *		 |--- cluster # N--|
3955  *    |--- extent ---|	|---- requested region ---|
3960  *   |--------- cluster # N ----------------|
3961  *	   |--- requested region --|   |------- extent ----|
3966  *          |------------- cluster # N-------------|
3967  * |----- ex -----|                  |---- ex_right ----|
3968  *                  |------ requested region ------|
3971  * In each of the above cases, we need to set the map->m_pblk and
3972  * map->m_len so it corresponds to the return the extent labelled as
3974  * cluster EXT4_B2C(sbi, map->m_lblk).	We will then return 1 to
3975  * signal to ext4_ext_map_blocks() that map->m_pblk should be treated
3986 	ext4_lblk_t c_offset = EXT4_LBLK_COFF(sbi, map->m_lblk);  in get_implied_cluster_alloc()
3989 	ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block);  in get_implied_cluster_alloc()
3995 	ex_cluster_end = EXT4_B2C(sbi, ee_block + ee_len - 1);  in get_implied_cluster_alloc()
3998 	rr_cluster_start = EXT4_B2C(sbi, map->m_lblk);  in get_implied_cluster_alloc()
4003 			ee_start += ee_len - 1;  in get_implied_cluster_alloc()
4004 		map->m_pblk = EXT4_PBLK_CMASK(sbi, ee_start) + c_offset;  in get_implied_cluster_alloc()
4005 		map->m_len = min(map->m_len,  in get_implied_cluster_alloc()
4006 				 (unsigned) sbi->s_cluster_ratio - c_offset);  in get_implied_cluster_alloc()
4010 		 *   |--------- cluster # N-------------|  in get_implied_cluster_alloc()
4011 		 *		       |------- extent ----|  in get_implied_cluster_alloc()
4012 		 *	   |--- requested region ---|  in get_implied_cluster_alloc()
4016 		if (map->m_lblk < ee_block)  in get_implied_cluster_alloc()
4017 			map->m_len = min(map->m_len, ee_block - map->m_lblk);  in get_implied_cluster_alloc()
4023 		 *          |------------- cluster # N-------------|  in get_implied_cluster_alloc()
4024 		 * |----- ex -----|                  |---- ex_right ----|  in get_implied_cluster_alloc()
4025 		 *                  |------ requested region ------|  in get_implied_cluster_alloc()
4028 		if (map->m_lblk > ee_block) {  in get_implied_cluster_alloc()
4030 			map->m_len = min(map->m_len, next - map->m_lblk);  in get_implied_cluster_alloc()
4059 				  hole_start + len - 1, &es);  in ext4_ext_determine_insert_hole()
4072 		len -= lblk - hole_start;  in ext4_ext_determine_insert_hole()
4082 		len = es.es_lblk + es.es_len - lblk;  in ext4_ext_determine_insert_hole()
4090 		len = min(es.es_lblk - hole_start, len);  in ext4_ext_determine_insert_hole()
4095 	ext_debug(inode, " -> %u:%u\n", hole_start, len);  in ext4_ext_determine_insert_hole()
4100 		len -= lblk - hole_start;  in ext4_ext_determine_insert_hole()
4110  * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
4111  * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
4114  *          if create == 0 and these are pre-allocated blocks
4128 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_ext_map_blocks()
4130 	int err = 0, depth, ret;  in ext4_ext_map_blocks()  local
4136 	ext_debug(inode, "blocks %u/%u requested\n", map->m_lblk, map->m_len);  in ext4_ext_map_blocks()
4137 	trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags);  in ext4_ext_map_blocks()
4140 	path = ext4_find_extent(inode, map->m_lblk, NULL, 0);  in ext4_ext_map_blocks()
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()
4156 				 "lblock: %lu, depth: %d pblock %lld",  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()
4159 		err = -EFSCORRUPTED;  in ext4_ext_map_blocks()
4163 	ex = path[depth].p_ext;  in ext4_ext_map_blocks()
4165 		ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block);  in ext4_ext_map_blocks()
4179 		if (in_range(map->m_lblk, ee_block, ee_len)) {  in ext4_ext_map_blocks()
4180 			newblock = map->m_lblk - ee_block + ee_start;  in ext4_ext_map_blocks()
4182 			allocated = ee_len - (map->m_lblk - ee_block);  in ext4_ext_map_blocks()
4183 			ext_debug(inode, "%u fit into %u:%d -> %llu\n",  in ext4_ext_map_blocks()
4184 				  map->m_lblk, ee_block, ee_len, newblock);  in ext4_ext_map_blocks()
4196 				map->m_flags |= EXT4_MAP_MAPPED;  in ext4_ext_map_blocks()
4197 				map->m_pblk = newblock;  in ext4_ext_map_blocks()
4198 				if (allocated > map->m_len)  in ext4_ext_map_blocks()
4199 					allocated = map->m_len;  in ext4_ext_map_blocks()
4200 				map->m_len = allocated;  in ext4_ext_map_blocks()
4223 		len = ext4_ext_determine_insert_hole(inode, path, map->m_lblk);  in ext4_ext_map_blocks()
4225 		map->m_pblk = 0;  in ext4_ext_map_blocks()
4226 		map->m_len = min_t(unsigned int, map->m_len, len);  in ext4_ext_map_blocks()
4233 	newex.ee_block = cpu_to_le32(map->m_lblk);  in ext4_ext_map_blocks()
4234 	cluster_offset = EXT4_LBLK_COFF(sbi, map->m_lblk);  in ext4_ext_map_blocks()
4241 	    get_implied_cluster_alloc(inode->i_sb, map, ex, path)) {  in ext4_ext_map_blocks()
4242 		ar.len = allocated = map->m_len;  in ext4_ext_map_blocks()
4243 		newblock = map->m_pblk;  in ext4_ext_map_blocks()
4248 	ar.lleft = map->m_lblk;  in ext4_ext_map_blocks()
4252 	ar.lright = map->m_lblk;  in ext4_ext_map_blocks()
4259 	if ((sbi->s_cluster_ratio > 1) && err &&  in ext4_ext_map_blocks()
4260 	    get_implied_cluster_alloc(inode->i_sb, map, &ex2, path)) {  in ext4_ext_map_blocks()
4261 		ar.len = allocated = map->m_len;  in ext4_ext_map_blocks()
4262 		newblock = map->m_pblk;  in ext4_ext_map_blocks()
4272 	if (map->m_len > EXT_INIT_MAX_LEN &&  in ext4_ext_map_blocks()
4274 		map->m_len = EXT_INIT_MAX_LEN;  in ext4_ext_map_blocks()
4275 	else if (map->m_len > EXT_UNWRITTEN_MAX_LEN &&  in ext4_ext_map_blocks()
4277 		map->m_len = EXT_UNWRITTEN_MAX_LEN;  in ext4_ext_map_blocks()
4280 	newex.ee_len = cpu_to_le16(map->m_len);  in ext4_ext_map_blocks()
4285 		allocated = map->m_len;  in ext4_ext_map_blocks()
4289 	ar.goal = ext4_ext_find_goal(inode, path, map->m_lblk);  in ext4_ext_map_blocks()
4290 	ar.logical = map->m_lblk;  in ext4_ext_map_blocks()
4299 	offset = EXT4_LBLK_COFF(sbi, map->m_lblk);  in ext4_ext_map_blocks()
4301 	ar.goal -= offset;  in ext4_ext_map_blocks()
4302 	ar.logical -= offset;  in ext4_ext_map_blocks()
4303 	if (S_ISREG(inode->i_mode))  in ext4_ext_map_blocks()
4306 		/* disable in-core preallocation for non-regular files */  in ext4_ext_map_blocks()
4318 	ar.len = EXT4_C2B(sbi, ar.len) - offset;  in ext4_ext_map_blocks()
4332 		map->m_flags |= EXT4_MAP_UNWRITTEN;  in ext4_ext_map_blocks()
4361 	if (test_opt(inode->i_sb, DELALLOC) && allocated_clusters) {  in ext4_ext_map_blocks()
4374 			 * When allocating non-delayed allocated clusters  in ext4_ext_map_blocks()
4384 			lblk = EXT4_LBLK_CMASK(sbi, map->m_lblk);  in ext4_ext_map_blocks()
4385 			len = allocated_clusters << sbi->s_cluster_bits;  in ext4_ext_map_blocks()
4401 	map->m_flags |= (EXT4_MAP_NEW | EXT4_MAP_MAPPED);  in ext4_ext_map_blocks()
4402 	map->m_pblk = pblk;  in ext4_ext_map_blocks()
4403 	map->m_len = ar.len;  in ext4_ext_map_blocks()
4404 	allocated = map->m_len;  in ext4_ext_map_blocks()
4416 	struct super_block *sb = inode->i_sb;  in ext4_ext_truncate()
4427 	EXT4_I(inode)->i_disksize = inode->i_size;  in ext4_ext_truncate()
4432 	last_block = (inode->i_size + sb->s_blocksize - 1)  in ext4_ext_truncate()
4434 	ext4_es_remove_extent(inode, last_block, EXT_MAX_BLOCKS - last_block);  in ext4_ext_truncate()
4437 	err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCKS - 1);  in ext4_ext_truncate()
4438 	if (err == -ENOMEM) {  in ext4_ext_truncate()
4453 	int depth = 0;  in ext4_alloc_file_blocks()  local
4473 	depth = ext_depth(inode);  in ext4_alloc_file_blocks()
4478 		 * Recalculate credits when extent tree depth changes.  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()
4495 				   inode->i_ino, map.m_lblk,  in ext4_alloc_file_blocks()
4506 		map.m_len = len = len - ret;  in ext4_alloc_file_blocks()
4507 		epos = (loff_t)map.m_lblk << inode->i_blkbits;  in ext4_alloc_file_blocks()
4513 				inode->i_mtime = inode_get_ctime(inode);  in ext4_alloc_file_blocks()
4522 	if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))  in ext4_alloc_file_blocks()
4536 	struct address_space *mapping = file->f_mapping;  in ext4_zero_range()
4546 	unsigned int blkbits = inode->i_blkbits;  in ext4_zero_range()
4561 		return -EINVAL;  in ext4_zero_range()
4562 	partial_begin = offset & ((1 << blkbits) - 1);  in ext4_zero_range()
4563 	partial_end = (offset + len) & ((1 << blkbits) - 1);  in ext4_zero_range()
4570 		max_blocks -= lblk;  in ext4_zero_range()
4578 		ret = -EOPNOTSUPP;  in ext4_zero_range()
4583 	    (offset + len > inode->i_size ||  in ext4_zero_range()
4584 	     offset + len > EXT4_I(inode)->i_disksize)) {  in ext4_zero_range()
4604 				(round_up((offset + len), 1 << blkbits) -  in ext4_zero_range()
4642 							   end - 1);  in ext4_zero_range()
4650 		truncate_pagecache_range(inode, start, end - 1);  in ext4_zero_range()
4651 		inode->i_mtime = inode_set_ctime_current(inode);  in ext4_zero_range()
4672 		ext4_std_error(inode->i_sb, ret);  in ext4_zero_range()
4676 	inode->i_mtime = inode_set_ctime_current(inode);  in ext4_zero_range()
4687 	if (file->f_flags & O_SYNC)  in ext4_zero_range()
4700  * For block-mapped files, posix_fallocate should fall back to the method
4712 	unsigned int blkbits = inode->i_blkbits;  in ext4_fallocate()
4716 	 * range since we would need to re-encrypt blocks with a  in ext4_fallocate()
4722 		return -EOPNOTSUPP;  in ext4_fallocate()
4728 		return -EOPNOTSUPP;  in ext4_fallocate()
4764 	 * We only support preallocation for extent-based files only  in ext4_fallocate()
4767 		ret = -EOPNOTSUPP;  in ext4_fallocate()
4772 	    (offset + len > inode->i_size ||  in ext4_fallocate()
4773 	     offset + len > EXT4_I(inode)->i_disksize)) {  in ext4_fallocate()
4791 	if (file->f_flags & O_SYNC && EXT4_SB(inode->i_sb)->s_journal) {  in ext4_fallocate()
4792 		ret = ext4_fc_commit(EXT4_SB(inode->i_sb)->s_journal,  in ext4_fallocate()
4793 					EXT4_I(inode)->i_sync_tid);  in ext4_fallocate()
4818 	unsigned int blkbits = inode->i_blkbits;  in ext4_convert_unwritten_extents()
4832 		map.m_len = (max_blocks -= ret);  in ext4_convert_unwritten_extents()
4844 			ext4_warning(inode->i_sb,  in ext4_convert_unwritten_extents()
4847 				     inode->i_ino, map.m_lblk,  in ext4_convert_unwritten_extents()
4879 	list_for_each_entry(io_end_vec, &io_end->list_vec, list) {  in ext4_convert_unwritten_io_end_vec()
4880 		ret = ext4_convert_unwritten_extents(handle, io_end->inode,  in ext4_convert_unwritten_io_end_vec()
4881 						     io_end_vec->offset,  in ext4_convert_unwritten_io_end_vec()
4882 						     io_end_vec->size);  in ext4_convert_unwritten_io_end_vec()
4897 	int blockbits = inode->i_sb->s_blocksize_bits;  in ext4_iomap_xattr_fiemap()
4901 	/* in-inode? */  in ext4_iomap_xattr_fiemap()
4909 		physical = (__u64)iloc.bh->b_blocknr << blockbits;  in ext4_iomap_xattr_fiemap()
4911 				EXT4_I(inode)->i_extra_isize;  in ext4_iomap_xattr_fiemap()
4913 		length = EXT4_SB(inode->i_sb)->s_inode_size - offset;  in ext4_iomap_xattr_fiemap()
4916 	} else if (EXT4_I(inode)->i_file_acl) { /* external block */  in ext4_iomap_xattr_fiemap()
4917 		physical = (__u64)EXT4_I(inode)->i_file_acl << blockbits;  in ext4_iomap_xattr_fiemap()
4918 		length = inode->i_sb->s_blocksize;  in ext4_iomap_xattr_fiemap()
4921 		/* no in-inode or external block for xattr, so return -ENOENT */  in ext4_iomap_xattr_fiemap()
4922 		error = -ENOENT;  in ext4_iomap_xattr_fiemap()
4926 	iomap->addr = physical;  in ext4_iomap_xattr_fiemap()
4927 	iomap->offset = 0;  in ext4_iomap_xattr_fiemap()
4928 	iomap->length = length;  in ext4_iomap_xattr_fiemap()
4929 	iomap->type = iomap_type;  in ext4_iomap_xattr_fiemap()
4930 	iomap->flags = 0;  in ext4_iomap_xattr_fiemap()
4942 	if (error == 0 && (offset >= iomap->length))  in ext4_iomap_xattr_begin()
4943 		error = -ENOENT;  in ext4_iomap_xattr_begin()
4956 		maxbytes = inode->i_sb->s_maxbytes;  in ext4_fiemap_check_ranges()
4958 		maxbytes = EXT4_SB(inode->i_sb)->s_bitmap_maxbytes;  in ext4_fiemap_check_ranges()
4961 		return -EINVAL;  in ext4_fiemap_check_ranges()
4963 		return -EFBIG;  in ext4_fiemap_check_ranges()
4968 	if (*len > maxbytes || (maxbytes - *len) < start)  in ext4_fiemap_check_ranges()
4969 		*len = maxbytes - start;  in ext4_fiemap_check_ranges()
4978 	if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {  in ext4_fiemap()
4982 		fieinfo->fi_flags &= ~FIEMAP_FLAG_CACHE;  in ext4_fiemap()
4994 	if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {  in ext4_fiemap()
4995 		fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;  in ext4_fiemap()
5013 		down_read(&EXT4_I(inode)->xattr_sem);  in ext4_get_es_cache()
5015 		up_read(&EXT4_I(inode)->xattr_sem);  in ext4_get_es_cache()
5020 	if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {  in ext4_get_es_cache()
5024 		fieinfo->fi_flags &= ~FIEMAP_FLAG_CACHE;  in ext4_get_es_cache()
5035 	start_blk = start >> inode->i_sb->s_blocksize_bits;  in ext4_get_es_cache()
5036 	last_blk = (start + len - 1) >> inode->i_sb->s_blocksize_bits;  in ext4_get_es_cache()
5038 		last_blk = EXT_MAX_BLOCKS-1;  in ext4_get_es_cache()
5039 	len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1;  in ext4_get_es_cache()
5050  * Shift the extents of a path structure lying between path[depth].p_ext
5051  * and EXT_LAST_EXTENT(path[depth].p_hdr), by @shift blocks. @SHIFT tells
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()
5069 				return -EFSCORRUPTED;  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()
5085 					err = -EAGAIN;  in ext4_ext_shift_path_extents()
5089 			err = ext4_ext_get_access(handle, inode, path + depth);  in ext4_ext_shift_path_extents()
5095 					le32_add_cpu(&ex_start->ee_block,  in ext4_ext_shift_path_extents()
5096 						-shift);  in ext4_ext_shift_path_extents()
5099 					    EXT_FIRST_EXTENT(path[depth].p_hdr))  in ext4_ext_shift_path_extents()
5102 					    path, ex_start - 1))  in ext4_ext_shift_path_extents()
5103 						ex_last--;  in ext4_ext_shift_path_extents()
5107 					le32_add_cpu(&ex_last->ee_block, shift);  in ext4_ext_shift_path_extents()
5110 					ex_last--;  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
5164 	path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL,  in ext4_ext_shift_extents()
5169 	depth = path->p_depth;  in ext4_ext_shift_extents()
5170 	extent = path[depth].p_ext;  in ext4_ext_shift_extents()
5174 	stop = le32_to_cpu(extent->ee_block);  in ext4_ext_shift_extents()
5182 		path = ext4_find_extent(inode, start - 1, &path,  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()
5189 			ex_start = le32_to_cpu(extent->ee_block);  in ext4_ext_shift_extents()
5190 			ex_end = le32_to_cpu(extent->ee_block) +  in ext4_ext_shift_extents()
5198 		    (shift > start - ex_end)) {  in ext4_ext_shift_extents()
5199 			ret = -EINVAL;  in ext4_ext_shift_extents()
5203 		if (shift > EXT_MAX_BLOCKS -  in ext4_ext_shift_extents()
5205 			ret = -EINVAL;  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()
5240 			return -EFSCORRUPTED;  in ext4_ext_shift_extents()
5243 		    le32_to_cpu(extent->ee_block)) {  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()
5256 			*iterator = le32_to_cpu(extent->ee_block) +  in ext4_ext_shift_extents()
5259 			extent = EXT_FIRST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5260 			if (le32_to_cpu(extent->ee_block) > start)  in ext4_ext_shift_extents()
5261 				*iterator = le32_to_cpu(extent->ee_block) - 1;  in ext4_ext_shift_extents()
5262 			else if (le32_to_cpu(extent->ee_block) == start)  in ext4_ext_shift_extents()
5265 				extent = EXT_LAST_EXTENT(path[depth].p_hdr);  in ext4_ext_shift_extents()
5266 				while (le32_to_cpu(extent->ee_block) >= start)  in ext4_ext_shift_extents()
5267 					extent--;  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()
5280 		if (ret == -EAGAIN)  in ext4_ext_shift_extents()
5293  * Returns: 0 and non-zero on error.
5298 	struct super_block *sb = inode->i_sb;  in ext4_collapse_range()
5299 	struct address_space *mapping = inode->i_mapping;  in ext4_collapse_range()
5312 		return -EOPNOTSUPP;  in ext4_collapse_range()
5316 		return -EINVAL;  in ext4_collapse_range()
5328 	if (offset + len >= inode->i_size) {  in ext4_collapse_range()
5329 		ret = -EINVAL;  in ext4_collapse_range()
5335 		ret = -EOPNOTSUPP;  in ext4_collapse_range()
5387 	down_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5389 	ext4_es_remove_extent(inode, punch_start, EXT_MAX_BLOCKS - punch_start);  in ext4_collapse_range()
5391 	ret = ext4_ext_remove_space(inode, punch_start, punch_stop - 1);  in ext4_collapse_range()
5393 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5399 				     punch_stop - punch_start, SHIFT_LEFT);  in ext4_collapse_range()
5401 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5405 	new_size = inode->i_size - len;  in ext4_collapse_range()
5407 	EXT4_I(inode)->i_disksize = new_size;  in ext4_collapse_range()
5409 	up_write(&EXT4_I(inode)->i_data_sem);  in ext4_collapse_range()
5412 	inode->i_mtime = inode_set_ctime_current(inode);  in ext4_collapse_range()
5436 	struct super_block *sb = inode->i_sb;  in ext4_insert_range()
5437 	struct address_space *mapping = inode->i_mapping;  in ext4_insert_range()
5443 	int ret = 0, depth, split_flag = 0;  in ext4_insert_range()  local
5452 		return -EOPNOTSUPP;  in ext4_insert_range()
5456 		return -EINVAL;  in ext4_insert_range()
5466 		ret = -EOPNOTSUPP;  in ext4_insert_range()
5471 	if (len > inode->i_sb->s_maxbytes - inode->i_size) {  in ext4_insert_range()
5472 		ret = -EFBIG;  in ext4_insert_range()
5477 	if (offset >= inode->i_size) {  in ext4_insert_range()
5478 		ret = -EINVAL;  in ext4_insert_range()
5505 	ret = filemap_write_and_wait_range(inode->i_mapping, ioffset,  in ext4_insert_range()
5520 	inode->i_size += len;  in ext4_insert_range()
5521 	EXT4_I(inode)->i_disksize += len;  in ext4_insert_range()
5522 	inode->i_mtime = inode_set_ctime_current(inode);  in ext4_insert_range()
5527 	down_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5532 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5536 	depth = ext_depth(inode);  in ext4_insert_range()
5537 	extent = path[depth].p_ext;  in ext4_insert_range()
5539 		ee_start_lblk = le32_to_cpu(extent->ee_block);  in ext4_insert_range()
5560 			up_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5567 	ext4_es_remove_extent(inode, offset_lblk, EXT_MAX_BLOCKS - offset_lblk);  in ext4_insert_range()
5576 	up_write(&EXT4_I(inode)->i_data_sem);  in ext4_insert_range()
5592  * ext4_swap_extents() - Swap extents between two inodes
5603  * stuff such as page-cache locking consistency, bh mapping consistency or
5620 	BUG_ON(!rwsem_is_locked(&EXT4_I(inode1)->i_data_sem));  in ext4_swap_extents()
5621 	BUG_ON(!rwsem_is_locked(&EXT4_I(inode2)->i_data_sem));  in ext4_swap_extents()
5648 		ex1 = path1[path1->p_depth].p_ext;  in ext4_swap_extents()
5649 		ex2 = path2[path2->p_depth].p_ext;  in ext4_swap_extents()
5654 		e1_blk = le32_to_cpu(ex1->ee_block);  in ext4_swap_extents()
5655 		e2_blk = le32_to_cpu(ex2->ee_block);  in ext4_swap_extents()
5676 			len = next1 - lblk1;  in ext4_swap_extents()
5677 			if (len < next2 - lblk2)  in ext4_swap_extents()
5678 				len = next2 - lblk2;  in ext4_swap_extents()
5683 			count -= len;  in ext4_swap_extents()
5709 		if (len > e1_blk + e1_len - lblk1)  in ext4_swap_extents()
5710 			len = e1_blk + e1_len - lblk1;  in ext4_swap_extents()
5711 		if (len > e2_blk + e2_len - lblk2)  in ext4_swap_extents()
5712 			len = e2_blk + e2_len - lblk2;  in ext4_swap_extents()
5734 		*erp = ext4_ext_get_access(handle, inode1, path1 + path1->p_depth);  in ext4_swap_extents()
5737 		*erp = ext4_ext_get_access(handle, inode2, path2 + path2->p_depth);  in ext4_swap_extents()
5745 		ex1->ee_len = cpu_to_le16(e2_len);  in ext4_swap_extents()
5746 		ex2->ee_len = cpu_to_le16(e1_len);  in ext4_swap_extents()
5755 				      path2->p_depth);  in ext4_swap_extents()
5759 				      path1->p_depth);  in ext4_swap_extents()
5771 		count -= len;  in ext4_swap_extents()
5782  * ext4_clu_mapped - determine whether any block in a logical cluster has
5785  * @inode - file containing the logical cluster
5786  * @lclu - logical cluster of interest
5795 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);  in ext4_clu_mapped()
5797 	int depth, mapped = 0, err = 0;  in ext4_clu_mapped()  local
5803 	 * mapped - no physical clusters have been allocated, and the  in ext4_clu_mapped()
5818 	depth = ext_depth(inode);  in ext4_clu_mapped()
5825 	if (unlikely(path[depth].p_ext == NULL && depth != 0)) {  in ext4_clu_mapped()
5827 		    "bad extent address - lblock: %lu, depth: %d, pblock: %lld",  in ext4_clu_mapped()
5829 				 depth, path[depth].p_block);  in ext4_clu_mapped()
5830 		err = -EFSCORRUPTED;  in ext4_clu_mapped()
5834 	extent = path[depth].p_ext;  in ext4_clu_mapped()
5840 	first_lblk = le32_to_cpu(extent->ee_block);  in ext4_clu_mapped()
5844 	 * Three possible outcomes at this point - found extent spanning  in ext4_clu_mapped()
5851 				     ext4_ext_get_actual_len(extent) - 1);  in ext4_clu_mapped()
5885 	ex = path[path->p_depth].p_ext;  in ext4_ext_replay_update_ex()
5887 		ret = -EFSCORRUPTED;  in ext4_ext_replay_update_ex()
5891 	if (le32_to_cpu(ex->ee_block) != start ||  in ext4_ext_replay_update_ex()
5895 		down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5897 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5903 			return -1;  in ext4_ext_replay_update_ex()
5905 		ex = path[path->p_depth].p_ext;  in ext4_ext_replay_update_ex()
5906 		WARN_ON(le32_to_cpu(ex->ee_block) != start);  in ext4_ext_replay_update_ex()
5908 			down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5911 			up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5917 				return -EINVAL;  in ext4_ext_replay_update_ex()
5918 			ex = path[path->p_depth].p_ext;  in ext4_ext_replay_update_ex()
5926 	down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_update_ex()
5927 	ret = ext4_ext_dirty(NULL, inode, &path[path->p_depth]);  in ext4_ext_replay_update_ex()
5928 	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_shrink_inode()
5953 		cur = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_replay_shrink_inode()
5957 		down_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_shrink_inode()
5958 		ext4_ext_dirty(NULL, inode, &path[path->p_depth]);  in ext4_ext_replay_shrink_inode()
5959 		up_write(&EXT4_I(inode)->i_data_sem);  in ext4_ext_replay_shrink_inode()
5972 	map.m_len = ((inode->i_size) >> inode->i_sb->s_blocksize_bits) - *cur;  in skip_hole()
5994 	path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL,  in ext4_ext_replay_set_iblocks()
5998 	ex = path[path->p_depth].p_ext;  in ext4_ext_replay_set_iblocks()
6003 	end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_replay_set_iblocks()
6010 		map.m_len = end - cur;  in ext4_ext_replay_set_iblocks()
6033 	numblks += path->p_depth;  in ext4_ext_replay_set_iblocks()
6039 		ex = path[path->p_depth].p_ext;  in ext4_ext_replay_set_iblocks()
6044 		cur = max(cur + 1, le32_to_cpu(ex->ee_block) +  in ext4_ext_replay_set_iblocks()
6056 		for (i = 0; i <= max(path->p_depth, path2->p_depth); i++) {  in ext4_ext_replay_set_iblocks()
6058 			if (i <= path->p_depth)  in ext4_ext_replay_set_iblocks()
6060 					path[i].p_bh->b_blocknr : 0;  in ext4_ext_replay_set_iblocks()
6061 			if (i <= path2->p_depth)  in ext4_ext_replay_set_iblocks()
6063 					path2[i].p_bh->b_blocknr : 0;  in ext4_ext_replay_set_iblocks()
6072 	inode->i_blocks = numblks << (inode->i_sb->s_blocksize_bits - 9);  in ext4_ext_replay_set_iblocks()
6089 	path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL,  in ext4_ext_clear_bb()
6093 	ex = path[path->p_depth].p_ext;  in ext4_ext_clear_bb()
6098 	end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);  in ext4_ext_clear_bb()
6104 		map.m_len = end - cur;  in ext4_ext_clear_bb()
6111 				for (j = 0; j < path->p_depth; j++) {  in ext4_ext_clear_bb()
6113 					ext4_mb_mark_bb(inode->i_sb,  in ext4_ext_clear_bb()
6115 					ext4_fc_record_regions(inode->i_sb, inode->i_ino,  in ext4_ext_clear_bb()
6120 			ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0);  in ext4_ext_clear_bb()
6121 			ext4_fc_record_regions(inode->i_sb, inode->i_ino,  in ext4_ext_clear_bb()