773 	struct extent_map *em;  in submit_compressed_extents()  local
851 		em = create_io_em(inode, async_extent->start,  in submit_compressed_extents()
860 		if (IS_ERR(em))  in submit_compressed_extents()
863 		free_extent_map(em);  in submit_compressed_extents()
936 	struct extent_map *em;  in get_extent_allocation_hint()  local
940 	em = search_extent_mapping(em_tree, start, num_bytes);  in get_extent_allocation_hint()
941 	if (em) {  in get_extent_allocation_hint()
947 		if (em->block_start >= EXTENT_MAP_LAST_BYTE) {  in get_extent_allocation_hint()
948 			free_extent_map(em);  in get_extent_allocation_hint()
949 			em = search_extent_mapping(em_tree, 0, 0);  in get_extent_allocation_hint()
950 			if (em && em->block_start < EXTENT_MAP_LAST_BYTE)  in get_extent_allocation_hint()
951 				alloc_hint = em->block_start;  in get_extent_allocation_hint()
952 			if (em)  in get_extent_allocation_hint()
953 				free_extent_map(em);  in get_extent_allocation_hint()
955 			alloc_hint = em->block_start;  in get_extent_allocation_hint()
956 			free_extent_map(em);  in get_extent_allocation_hint()
991 	struct extent_map *em;  in cow_file_range()  local
1065 		em = create_io_em(inode, start, ins.offset, /* len */  in cow_file_range()
1073 		if (IS_ERR(em)) {  in cow_file_range()
1074 			ret = PTR_ERR(em);  in cow_file_range()
1077 		free_extent_map(em);  in cow_file_range()
1698 			struct extent_map *em;  in run_delalloc_nocow()  local
1700 			em = create_io_em(inode, cur_offset, num_bytes,  in run_delalloc_nocow()
1707 			if (IS_ERR(em)) {  in run_delalloc_nocow()
1708 				ret = PTR_ERR(em);  in run_delalloc_nocow()
1711 			free_extent_map(em);  in run_delalloc_nocow()
2266 		struct extent_map *em;  in btrfs_find_new_delalloc_bytes()  local
2270 		em = btrfs_get_extent(inode, NULL, 0, search_start, search_len);  in btrfs_find_new_delalloc_bytes()
2271 		if (IS_ERR(em))  in btrfs_find_new_delalloc_bytes()
2272 			return PTR_ERR(em);  in btrfs_find_new_delalloc_bytes()
2274 		if (em->block_start != EXTENT_MAP_HOLE)  in btrfs_find_new_delalloc_bytes()
2277 		em_len = em->len;  in btrfs_find_new_delalloc_bytes()
2278 		if (em->start < search_start)  in btrfs_find_new_delalloc_bytes()
2279 			em_len -= search_start - em->start;  in btrfs_find_new_delalloc_bytes()
2288 		search_start = extent_map_end(em);  in btrfs_find_new_delalloc_bytes()
2289 		free_extent_map(em);  in btrfs_find_new_delalloc_bytes()
4744 	struct extent_map *em = NULL;  in btrfs_cont_expand()  local
4770 		em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, cur_offset,  in btrfs_cont_expand()
4772 		if (IS_ERR(em)) {  in btrfs_cont_expand()
4773 			err = PTR_ERR(em);  in btrfs_cont_expand()
4774 			em = NULL;  in btrfs_cont_expand()
4777 		last_byte = min(extent_map_end(em), block_end);  in btrfs_cont_expand()
4781 		if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {  in btrfs_cont_expand()
4832 		free_extent_map(em);  in btrfs_cont_expand()
4833 		em = NULL;  in btrfs_cont_expand()
4838 	free_extent_map(em);  in btrfs_cont_expand()
4981 		struct extent_map *em;  in evict_inode_truncate_pages()  local
4984 		em = rb_entry(node, struct extent_map, rb_node);  in evict_inode_truncate_pages()
4985 		clear_bit(EXTENT_FLAG_PINNED, &em->flags);  in evict_inode_truncate_pages()
4986 		clear_bit(EXTENT_FLAG_LOGGING, &em->flags);  in evict_inode_truncate_pages()
4987 		remove_extent_mapping(map_tree, em);  in evict_inode_truncate_pages()
4988 		free_extent_map(em);  in evict_inode_truncate_pages()
6588 	struct extent_map *em = NULL;  in btrfs_get_extent()  local
6593 	em = lookup_extent_mapping(em_tree, start, len);  in btrfs_get_extent()
6596 	if (em) {  in btrfs_get_extent()
6597 		if (em->start > start || em->start + em->len <= start)  in btrfs_get_extent()
6598 			free_extent_map(em);  in btrfs_get_extent()
6599 		else if (em->block_start == EXTENT_MAP_INLINE && page)  in btrfs_get_extent()
6600 			free_extent_map(em);  in btrfs_get_extent()
6604 	em = alloc_extent_map();  in btrfs_get_extent()
6605 	if (!em) {  in btrfs_get_extent()
6609 	em->start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6610 	em->orig_start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6611 	em->len = (u64)-1;  in btrfs_get_extent()
6612 	em->block_len = (u64)-1;  in btrfs_get_extent()
6699 		em->start = start;  in btrfs_get_extent()
6700 		em->orig_start = start;  in btrfs_get_extent()
6701 		em->len = found_key.offset - start;  in btrfs_get_extent()
6702 		em->block_start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6706 	btrfs_extent_item_to_extent_map(inode, path, item, !page, em);  in btrfs_get_extent()
6725 		em->start = extent_start + extent_offset;  in btrfs_get_extent()
6726 		em->len = ALIGN(copy_size, fs_info->sectorsize);  in btrfs_get_extent()
6727 		em->orig_block_len = em->len;  in btrfs_get_extent()
6728 		em->orig_start = em->start;  in btrfs_get_extent()
6752 		set_extent_uptodate(io_tree, em->start,  in btrfs_get_extent()
6753 				    extent_map_end(em) - 1, NULL, GFP_NOFS);  in btrfs_get_extent()
6757 	em->start = start;  in btrfs_get_extent()
6758 	em->orig_start = start;  in btrfs_get_extent()
6759 	em->len = len;  in btrfs_get_extent()
6760 	em->block_start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6764 	if (em->start > start || extent_map_end(em) <= start) {  in btrfs_get_extent()
6767 			  em->start, em->len, start, len);  in btrfs_get_extent()
6773 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);  in btrfs_get_extent()
6778 	trace_btrfs_get_extent(root, inode, em);  in btrfs_get_extent()
6781 		free_extent_map(em);  in btrfs_get_extent()
6784 	return em;  in btrfs_get_extent()
6790 	struct extent_map *em;  in btrfs_get_extent_fiemap()  local
6798 	em = btrfs_get_extent(inode, NULL, 0, start, len);  in btrfs_get_extent_fiemap()
6799 	if (IS_ERR(em))  in btrfs_get_extent_fiemap()
6800 		return em;  in btrfs_get_extent_fiemap()
6807 	if (em->block_start != EXTENT_MAP_HOLE &&  in btrfs_get_extent_fiemap()
6808 	    !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in btrfs_get_extent_fiemap()
6809 		return em;  in btrfs_get_extent_fiemap()
6811 		hole_em = em;  in btrfs_get_extent_fiemap()
6820 	em = NULL;  in btrfs_get_extent_fiemap()
6834 		em = hole_em;  in btrfs_get_extent_fiemap()
6851 		em = alloc_extent_map();  in btrfs_get_extent_fiemap()
6852 		if (!em) {  in btrfs_get_extent_fiemap()
6879 			em->len = min(hole_len, delalloc_start - hole_start);  in btrfs_get_extent_fiemap()
6880 			em->start = hole_start;  in btrfs_get_extent_fiemap()
6881 			em->orig_start = hole_start;  in btrfs_get_extent_fiemap()
6886 			em->block_start = hole_em->block_start;  in btrfs_get_extent_fiemap()
6887 			em->block_len = hole_len;  in btrfs_get_extent_fiemap()
6889 				set_bit(EXTENT_FLAG_PREALLOC, &em->flags);  in btrfs_get_extent_fiemap()
6895 			em->start = delalloc_start;  in btrfs_get_extent_fiemap()
6896 			em->len = delalloc_len;  in btrfs_get_extent_fiemap()
6897 			em->orig_start = delalloc_start;  in btrfs_get_extent_fiemap()
6898 			em->block_start = EXTENT_MAP_DELALLOC;  in btrfs_get_extent_fiemap()
6899 			em->block_len = delalloc_len;  in btrfs_get_extent_fiemap()
6908 		free_extent_map(em);  in btrfs_get_extent_fiemap()
6911 	return em;  in btrfs_get_extent_fiemap()
6924 	struct extent_map *em = NULL;  in btrfs_create_dio_extent()  local
6928 		em = create_io_em(inode, start, len, orig_start, block_start,  in btrfs_create_dio_extent()
6932 		if (IS_ERR(em))  in btrfs_create_dio_extent()
6938 		if (em) {  in btrfs_create_dio_extent()
6939 			free_extent_map(em);  in btrfs_create_dio_extent()
6942 		em = ERR_PTR(ret);  in btrfs_create_dio_extent()
6946 	return em;  in btrfs_create_dio_extent()
6954 	struct extent_map *em;  in btrfs_new_extent_direct()  local
6965 	em = btrfs_create_dio_extent(inode, start, ins.offset, start,  in btrfs_new_extent_direct()
6969 	if (IS_ERR(em))  in btrfs_new_extent_direct()
6973 	return em;  in btrfs_new_extent_direct()
7233 	struct extent_map *em;  in create_io_em()  local
7242 	em = alloc_extent_map();  in create_io_em()
7243 	if (!em)  in create_io_em()
7246 	em->start = start;  in create_io_em()
7247 	em->orig_start = orig_start;  in create_io_em()
7248 	em->len = len;  in create_io_em()
7249 	em->block_len = block_len;  in create_io_em()
7250 	em->block_start = block_start;  in create_io_em()
7251 	em->orig_block_len = orig_block_len;  in create_io_em()
7252 	em->ram_bytes = ram_bytes;  in create_io_em()
7253 	em->generation = -1;  in create_io_em()
7254 	set_bit(EXTENT_FLAG_PINNED, &em->flags);  in create_io_em()
7256 		set_bit(EXTENT_FLAG_FILLING, &em->flags);  in create_io_em()
7258 		set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);  in create_io_em()
7259 		em->compress_type = compress_type;  in create_io_em()
7263 		btrfs_drop_extent_cache(inode, em->start,  in create_io_em()
7264 					em->start + em->len - 1, 0);  in create_io_em()
7266 		ret = add_extent_mapping(em_tree, em, 1);  in create_io_em()
7275 		free_extent_map(em);  in create_io_em()
7280 	return em;  in create_io_em()
7290 	struct extent_map *em = *map;  in btrfs_get_blocks_direct_write()  local
7302 	if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags) ||  in btrfs_get_blocks_direct_write()
7304 	     em->block_start != EXTENT_MAP_HOLE)) {  in btrfs_get_blocks_direct_write()
7308 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in btrfs_get_blocks_direct_write()
7312 		len = min(len, em->len - (start - em->start));  in btrfs_get_blocks_direct_write()
7313 		block_start = em->block_start + (start - em->start);  in btrfs_get_blocks_direct_write()
7326 				free_extent_map(em);  in btrfs_get_blocks_direct_write()
7327 				*map = em = em2;  in btrfs_get_blocks_direct_write()
7345 	free_extent_map(em);  in btrfs_get_blocks_direct_write()
7346 	*map = em = btrfs_new_extent_direct(BTRFS_I(inode), start, len);  in btrfs_get_blocks_direct_write()
7347 	if (IS_ERR(em)) {  in btrfs_get_blocks_direct_write()
7348 		ret = PTR_ERR(em);  in btrfs_get_blocks_direct_write()
7352 	len = min(len, em->len - (start - em->start));  in btrfs_get_blocks_direct_write()
7372 	struct extent_map *em;  in btrfs_dio_iomap_begin()  local
7441 	em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, start, len);  in btrfs_dio_iomap_begin()
7442 	if (IS_ERR(em)) {  in btrfs_dio_iomap_begin()
7443 		ret = PTR_ERR(em);  in btrfs_dio_iomap_begin()
7461 	if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) ||  in btrfs_dio_iomap_begin()
7462 	    em->block_start == EXTENT_MAP_INLINE) {  in btrfs_dio_iomap_begin()
7463 		free_extent_map(em);  in btrfs_dio_iomap_begin()
7468 	len = min(len, em->len - (start - em->start));  in btrfs_dio_iomap_begin()
7470 		ret = btrfs_get_blocks_direct_write(&em, inode, dio_data,  in btrfs_dio_iomap_begin()
7476 		len = min(len, em->len - (start - em->start));  in btrfs_dio_iomap_begin()
7498 	if ((em->block_start == EXTENT_MAP_HOLE) ||  in btrfs_dio_iomap_begin()
7499 	    (test_bit(EXTENT_FLAG_PREALLOC, &em->flags) && !write)) {  in btrfs_dio_iomap_begin()
7503 		iomap->addr = em->block_start + (start - em->start);  in btrfs_dio_iomap_begin()
7510 	free_extent_map(em);  in btrfs_dio_iomap_begin()
9696 	struct extent_map *em;  in __btrfs_prealloc_file_range()  local
9753 		em = alloc_extent_map();  in __btrfs_prealloc_file_range()
9754 		if (!em) {  in __btrfs_prealloc_file_range()
9760 		em->start = cur_offset;  in __btrfs_prealloc_file_range()
9761 		em->orig_start = cur_offset;  in __btrfs_prealloc_file_range()
9762 		em->len = ins.offset;  in __btrfs_prealloc_file_range()
9763 		em->block_start = ins.objectid;  in __btrfs_prealloc_file_range()
9764 		em->block_len = ins.offset;  in __btrfs_prealloc_file_range()
9765 		em->orig_block_len = ins.offset;  in __btrfs_prealloc_file_range()
9766 		em->ram_bytes = ins.offset;  in __btrfs_prealloc_file_range()
9767 		set_bit(EXTENT_FLAG_PREALLOC, &em->flags);  in __btrfs_prealloc_file_range()
9768 		em->generation = trans->transid;  in __btrfs_prealloc_file_range()
9772 			ret = add_extent_mapping(em_tree, em, 1);  in __btrfs_prealloc_file_range()
9780 		free_extent_map(em);  in __btrfs_prealloc_file_range()
10061 	struct extent_map *em = NULL;  in btrfs_swap_activate()  local
10126 		em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, start, len);  in btrfs_swap_activate()
10127 		if (IS_ERR(em)) {  in btrfs_swap_activate()
10128 			ret = PTR_ERR(em);  in btrfs_swap_activate()
10132 		if (em->block_start == EXTENT_MAP_HOLE) {  in btrfs_swap_activate()
10137 		if (em->block_start == EXTENT_MAP_INLINE) {  in btrfs_swap_activate()
10149 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_swap_activate()
10155 		logical_block_start = em->block_start + (start - em->start);  in btrfs_swap_activate()
10156 		len = min(len, em->len - (start - em->start));  in btrfs_swap_activate()
10157 		free_extent_map(em);  in btrfs_swap_activate()
10158 		em = NULL;  in btrfs_swap_activate()
10172 		em = btrfs_get_chunk_map(fs_info, logical_block_start, len);  in btrfs_swap_activate()
10173 		if (IS_ERR(em)) {  in btrfs_swap_activate()
10174 			ret = PTR_ERR(em);  in btrfs_swap_activate()
10178 		if (em->map_lookup->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {  in btrfs_swap_activate()
10186 			device = em->map_lookup->stripes[0].dev;  in btrfs_swap_activate()
10192 		} else if (device != em->map_lookup->stripes[0].dev) {  in btrfs_swap_activate()
10198 		physical_block_start = (em->map_lookup->stripes[0].physical +  in btrfs_swap_activate()
10199 					(logical_block_start - em->start));  in btrfs_swap_activate()
10200 		len = min(len, em->len - (logical_block_start - em->start));  in btrfs_swap_activate()
10201 		free_extent_map(em);  in btrfs_swap_activate()
10202 		em = NULL;  in btrfs_swap_activate()
10242 	if (!IS_ERR_OR_NULL(em))  in btrfs_swap_activate()
10243 		free_extent_map(em);  in btrfs_swap_activate()