1105 	struct extent_map *em;  in submit_one_async_extent()  local
1147 	em = create_io_em(inode, start,  in submit_one_async_extent()
1156 	if (IS_ERR(em)) {  in submit_one_async_extent()
1157 		ret = PTR_ERR(em);  in submit_one_async_extent()
1160 	free_extent_map(em);  in submit_one_async_extent()
1217 	struct extent_map *em;  in get_extent_allocation_hint()  local
1221 	em = search_extent_mapping(em_tree, start, num_bytes);  in get_extent_allocation_hint()
1222 	if (em) {  in get_extent_allocation_hint()
1228 		if (em->block_start >= EXTENT_MAP_LAST_BYTE) {  in get_extent_allocation_hint()
1229 			free_extent_map(em);  in get_extent_allocation_hint()
1230 			em = search_extent_mapping(em_tree, 0, 0);  in get_extent_allocation_hint()
1231 			if (em && em->block_start < EXTENT_MAP_LAST_BYTE)  in get_extent_allocation_hint()
1232 				alloc_hint = em->block_start;  in get_extent_allocation_hint()
1233 			if (em)  in get_extent_allocation_hint()
1234 				free_extent_map(em);  in get_extent_allocation_hint()
1236 			alloc_hint = em->block_start;  in get_extent_allocation_hint()
1237 			free_extent_map(em);  in get_extent_allocation_hint()
1288 	struct extent_map *em;  in cow_file_range()  local
1411 		em = create_io_em(inode, start, ins.offset, /* len */  in cow_file_range()
1419 		if (IS_ERR(em)) {  in cow_file_range()
1420 			ret = PTR_ERR(em);  in cow_file_range()
1423 		free_extent_map(em);  in cow_file_range()
2138 			struct extent_map *em;  in run_delalloc_nocow()  local
2140 			em = create_io_em(inode, cur_offset, nocow_args.num_bytes,  in run_delalloc_nocow()
2147 			if (IS_ERR(em)) {  in run_delalloc_nocow()
2149 				ret = PTR_ERR(em);  in run_delalloc_nocow()
2152 			free_extent_map(em);  in run_delalloc_nocow()
2619 		struct extent_map *em;  in btrfs_find_new_delalloc_bytes()  local
2623 		em = btrfs_get_extent(inode, NULL, 0, search_start, search_len);  in btrfs_find_new_delalloc_bytes()
2624 		if (IS_ERR(em))  in btrfs_find_new_delalloc_bytes()
2625 			return PTR_ERR(em);  in btrfs_find_new_delalloc_bytes()
2627 		if (em->block_start != EXTENT_MAP_HOLE)  in btrfs_find_new_delalloc_bytes()
2630 		em_len = em->len;  in btrfs_find_new_delalloc_bytes()
2631 		if (em->start < search_start)  in btrfs_find_new_delalloc_bytes()
2632 			em_len -= search_start - em->start;  in btrfs_find_new_delalloc_bytes()
2640 		search_start = extent_map_end(em);  in btrfs_find_new_delalloc_bytes()
2641 		free_extent_map(em);  in btrfs_find_new_delalloc_bytes()
4853 	struct extent_map *em = NULL;  in btrfs_cont_expand()  local
4878 		em = btrfs_get_extent(inode, NULL, 0, cur_offset,  in btrfs_cont_expand()
4880 		if (IS_ERR(em)) {  in btrfs_cont_expand()
4881 			err = PTR_ERR(em);  in btrfs_cont_expand()
4882 			em = NULL;  in btrfs_cont_expand()
4885 		last_byte = min(extent_map_end(em), block_end);  in btrfs_cont_expand()
4889 		if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {  in btrfs_cont_expand()
4930 		free_extent_map(em);  in btrfs_cont_expand()
4931 		em = NULL;  in btrfs_cont_expand()
4936 	free_extent_map(em);  in btrfs_cont_expand()
6743 	struct extent_map *em = NULL;  in btrfs_get_extent()  local
6747 	em = lookup_extent_mapping(em_tree, start, len);  in btrfs_get_extent()
6750 	if (em) {  in btrfs_get_extent()
6751 		if (em->start > start || em->start + em->len <= start)  in btrfs_get_extent()
6752 			free_extent_map(em);  in btrfs_get_extent()
6753 		else if (em->block_start == EXTENT_MAP_INLINE && page)  in btrfs_get_extent()
6754 			free_extent_map(em);  in btrfs_get_extent()
6758 	em = alloc_extent_map();  in btrfs_get_extent()
6759 	if (!em) {  in btrfs_get_extent()
6763 	em->start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6764 	em->orig_start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6765 	em->len = (u64)-1;  in btrfs_get_extent()
6766 	em->block_len = (u64)-1;  in btrfs_get_extent()
6855 		em->start = start;  in btrfs_get_extent()
6856 		em->orig_start = start;  in btrfs_get_extent()
6857 		em->len = found_key.offset - start;  in btrfs_get_extent()
6858 		em->block_start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6862 	btrfs_extent_item_to_extent_map(inode, path, item, em);  in btrfs_get_extent()
6875 		ASSERT(em->start == 0);  in btrfs_get_extent()
6883 		ASSERT(em->block_start == EXTENT_MAP_INLINE);  in btrfs_get_extent()
6884 		ASSERT(em->len == fs_info->sectorsize);  in btrfs_get_extent()
6892 	em->start = start;  in btrfs_get_extent()
6893 	em->orig_start = start;  in btrfs_get_extent()
6894 	em->len = len;  in btrfs_get_extent()
6895 	em->block_start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6899 	if (em->start > start || extent_map_end(em) <= start) {  in btrfs_get_extent()
6902 			  em->start, em->len, start, len);  in btrfs_get_extent()
6908 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);  in btrfs_get_extent()
6913 	trace_btrfs_get_extent(root, inode, em);  in btrfs_get_extent()
6916 		free_extent_map(em);  in btrfs_get_extent()
6919 	return em;  in btrfs_get_extent()
6933 	struct extent_map *em = NULL;  in btrfs_create_dio_extent()  local
6937 		em = create_io_em(inode, start, len, orig_start, block_start,  in btrfs_create_dio_extent()
6941 		if (IS_ERR(em))  in btrfs_create_dio_extent()
6950 		if (em) {  in btrfs_create_dio_extent()
6951 			free_extent_map(em);  in btrfs_create_dio_extent()
6955 		em = ERR_CAST(ordered);  in btrfs_create_dio_extent()
6962 	return em;  in btrfs_create_dio_extent()
6971 	struct extent_map *em;  in btrfs_new_extent_direct()  local
6982 	em = btrfs_create_dio_extent(inode, dio_data, start, ins.offset, start,  in btrfs_new_extent_direct()
6986 	if (IS_ERR(em))  in btrfs_new_extent_direct()
6990 	return em;  in btrfs_new_extent_direct()
7226 	struct extent_map *em;  in create_io_em()  local
7234 	em = alloc_extent_map();  in create_io_em()
7235 	if (!em)  in create_io_em()
7238 	em->start = start;  in create_io_em()
7239 	em->orig_start = orig_start;  in create_io_em()
7240 	em->len = len;  in create_io_em()
7241 	em->block_len = block_len;  in create_io_em()
7242 	em->block_start = block_start;  in create_io_em()
7243 	em->orig_block_len = orig_block_len;  in create_io_em()
7244 	em->ram_bytes = ram_bytes;  in create_io_em()
7245 	em->generation = -1;  in create_io_em()
7246 	set_bit(EXTENT_FLAG_PINNED, &em->flags);  in create_io_em()
7248 		set_bit(EXTENT_FLAG_FILLING, &em->flags);  in create_io_em()
7250 		set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);  in create_io_em()
7251 		em->compress_type = compress_type;  in create_io_em()
7254 	ret = btrfs_replace_extent_map_range(inode, em, true);  in create_io_em()
7256 		free_extent_map(em);  in create_io_em()
7261 	return em;  in create_io_em()
7273 	struct extent_map *em = *map;  in btrfs_get_blocks_direct_write()  local
7292 	if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags) ||  in btrfs_get_blocks_direct_write()
7294 	     em->block_start != EXTENT_MAP_HOLE)) {  in btrfs_get_blocks_direct_write()
7295 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in btrfs_get_blocks_direct_write()
7299 		len = min(len, em->len - (start - em->start));  in btrfs_get_blocks_direct_write()
7300 		block_start = em->block_start + (start - em->start);  in btrfs_get_blocks_direct_write()
7319 			free_extent_map(em);  in btrfs_get_blocks_direct_write()
7334 			free_extent_map(em);  in btrfs_get_blocks_direct_write()
7336 			em = em2;  in btrfs_get_blocks_direct_write()
7347 		free_extent_map(em);  in btrfs_get_blocks_direct_write()
7374 		em = btrfs_new_extent_direct(BTRFS_I(inode), dio_data, start, len);  in btrfs_get_blocks_direct_write()
7375 		if (IS_ERR(em)) {  in btrfs_get_blocks_direct_write()
7376 			ret = PTR_ERR(em);  in btrfs_get_blocks_direct_write()
7379 		*map = em;  in btrfs_get_blocks_direct_write()
7380 		len = min(len, em->len - (start - em->start));  in btrfs_get_blocks_direct_write()
7413 	struct extent_map *em;  in btrfs_dio_iomap_begin()  local
7510 	em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, start, len);  in btrfs_dio_iomap_begin()
7511 	if (IS_ERR(em)) {  in btrfs_dio_iomap_begin()
7512 		ret = PTR_ERR(em);  in btrfs_dio_iomap_begin()
7530 	if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) ||  in btrfs_dio_iomap_begin()
7531 	    em->block_start == EXTENT_MAP_INLINE) {  in btrfs_dio_iomap_begin()
7532 		free_extent_map(em);  in btrfs_dio_iomap_begin()
7549 	len = min(len, em->len - (start - em->start));  in btrfs_dio_iomap_begin()
7573 		free_extent_map(em);  in btrfs_dio_iomap_begin()
7579 		ret = btrfs_get_blocks_direct_write(&em, inode, dio_data,  in btrfs_dio_iomap_begin()
7585 		len = min(len, em->len - (start - em->start));  in btrfs_dio_iomap_begin()
7625 	if ((em->block_start == EXTENT_MAP_HOLE) ||  in btrfs_dio_iomap_begin()
7626 	    (test_bit(EXTENT_FLAG_PREALLOC, &em->flags) && !write)) {  in btrfs_dio_iomap_begin()
7630 		iomap->addr = em->block_start + (start - em->start);  in btrfs_dio_iomap_begin()
7636 	free_extent_map(em);  in btrfs_dio_iomap_begin()
9548 	struct extent_map *em;  in __btrfs_prealloc_file_range()  local
9603 		em = alloc_extent_map();  in __btrfs_prealloc_file_range()
9604 		if (!em) {  in __btrfs_prealloc_file_range()
9611 		em->start = cur_offset;  in __btrfs_prealloc_file_range()
9612 		em->orig_start = cur_offset;  in __btrfs_prealloc_file_range()
9613 		em->len = ins.offset;  in __btrfs_prealloc_file_range()
9614 		em->block_start = ins.objectid;  in __btrfs_prealloc_file_range()
9615 		em->block_len = ins.offset;  in __btrfs_prealloc_file_range()
9616 		em->orig_block_len = ins.offset;  in __btrfs_prealloc_file_range()
9617 		em->ram_bytes = ins.offset;  in __btrfs_prealloc_file_range()
9618 		set_bit(EXTENT_FLAG_PREALLOC, &em->flags);  in __btrfs_prealloc_file_range()
9619 		em->generation = trans->transid;  in __btrfs_prealloc_file_range()
9621 		ret = btrfs_replace_extent_map_range(BTRFS_I(inode), em, true);  in __btrfs_prealloc_file_range()
9622 		free_extent_map(em);  in __btrfs_prealloc_file_range()
10036 	struct extent_map *em;  in btrfs_encoded_read()  local
10071 	em = btrfs_get_extent(inode, NULL, 0, start, lockend - start + 1);  in btrfs_encoded_read()
10072 	if (IS_ERR(em)) {  in btrfs_encoded_read()
10073 		ret = PTR_ERR(em);  in btrfs_encoded_read()
10077 	if (em->block_start == EXTENT_MAP_INLINE) {  in btrfs_encoded_read()
10078 		u64 extent_start = em->start;  in btrfs_encoded_read()
10084 		free_extent_map(em);  in btrfs_encoded_read()
10085 		em = NULL;  in btrfs_encoded_read()
10096 	encoded->len = min_t(u64, extent_map_end(em),  in btrfs_encoded_read()
10098 	if (em->block_start == EXTENT_MAP_HOLE ||  in btrfs_encoded_read()
10099 	    test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {  in btrfs_encoded_read()
10104 	} else if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_encoded_read()
10105 		disk_bytenr = em->block_start;  in btrfs_encoded_read()
10110 		if (em->block_len > count) {  in btrfs_encoded_read()
10114 		disk_io_size = em->block_len;  in btrfs_encoded_read()
10115 		count = em->block_len;  in btrfs_encoded_read()
10116 		encoded->unencoded_len = em->ram_bytes;  in btrfs_encoded_read()
10117 		encoded->unencoded_offset = iocb->ki_pos - em->orig_start;  in btrfs_encoded_read()
10119 							     em->compress_type);  in btrfs_encoded_read()
10124 		disk_bytenr = em->block_start + (start - em->start);  in btrfs_encoded_read()
10137 	free_extent_map(em);  in btrfs_encoded_read()
10138 	em = NULL;  in btrfs_encoded_read()
10159 	free_extent_map(em);  in btrfs_encoded_read()
10187 	struct extent_map *em;  in btrfs_do_encoded_write()  local
10345 	em = create_io_em(inode, start, num_bytes,  in btrfs_do_encoded_write()
10349 	if (IS_ERR(em)) {  in btrfs_do_encoded_write()
10350 		ret = PTR_ERR(em);  in btrfs_do_encoded_write()
10353 	free_extent_map(em);  in btrfs_do_encoded_write()
10549 	struct extent_map *em = NULL;  in btrfs_swap_activate()  local
10643 		em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, start, len);  in btrfs_swap_activate()
10644 		if (IS_ERR(em)) {  in btrfs_swap_activate()
10645 			ret = PTR_ERR(em);  in btrfs_swap_activate()
10649 		if (em->block_start == EXTENT_MAP_HOLE) {  in btrfs_swap_activate()
10654 		if (em->block_start == EXTENT_MAP_INLINE) {  in btrfs_swap_activate()
10666 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_swap_activate()
10672 		logical_block_start = em->block_start + (start - em->start);  in btrfs_swap_activate()
10673 		len = min(len, em->len - (start - em->start));  in btrfs_swap_activate()
10674 		free_extent_map(em);  in btrfs_swap_activate()
10675 		em = NULL;  in btrfs_swap_activate()
10689 		em = btrfs_get_chunk_map(fs_info, logical_block_start, len);  in btrfs_swap_activate()
10690 		if (IS_ERR(em)) {  in btrfs_swap_activate()
10691 			ret = PTR_ERR(em);  in btrfs_swap_activate()
10695 		if (em->map_lookup->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {  in btrfs_swap_activate()
10703 			device = em->map_lookup->stripes[0].dev;  in btrfs_swap_activate()
10709 		} else if (device != em->map_lookup->stripes[0].dev) {  in btrfs_swap_activate()
10715 		physical_block_start = (em->map_lookup->stripes[0].physical +  in btrfs_swap_activate()
10716 					(logical_block_start - em->start));  in btrfs_swap_activate()
10717 		len = min(len, em->len - (logical_block_start - em->start));  in btrfs_swap_activate()
10718 		free_extent_map(em);  in btrfs_swap_activate()
10719 		em = NULL;  in btrfs_swap_activate()
10770 	if (!IS_ERR_OR_NULL(em))  in btrfs_swap_activate()
10771 		free_extent_map(em);  in btrfs_swap_activate()