2208 	struct extent_map *em;  in btrfs_get_io_failure_record()  local
2228 		em = lookup_extent_mapping(em_tree, start, failrec->len);  in btrfs_get_io_failure_record()
2229 		if (!em) {  in btrfs_get_io_failure_record()
2235 		if (em->start > start || em->start + em->len <= start) {  in btrfs_get_io_failure_record()
2236 			free_extent_map(em);  in btrfs_get_io_failure_record()
2237 			em = NULL;  in btrfs_get_io_failure_record()
2240 		if (!em) {  in btrfs_get_io_failure_record()
2245 		logical = start - em->start;  in btrfs_get_io_failure_record()
2246 		logical = em->block_start + logical;  in btrfs_get_io_failure_record()
2247 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_get_io_failure_record()
2248 			logical = em->block_start;  in btrfs_get_io_failure_record()
2251 						 em->compress_type);  in btrfs_get_io_failure_record()
2258 		free_extent_map(em);  in btrfs_get_io_failure_record()
2878 	struct extent_map *em;  in __get_extent_map()  local
2881 		em = *em_cached;  in __get_extent_map()
2882 		if (extent_map_in_tree(em) && start >= em->start &&  in __get_extent_map()
2883 		    start < extent_map_end(em)) {  in __get_extent_map()
2884 			atomic_inc(&em->refs);  in __get_extent_map()
2885 			return em;  in __get_extent_map()
2888 		free_extent_map(em);  in __get_extent_map()
2892 	em = get_extent(inode, page, pg_offset, start, len, 0);  in __get_extent_map()
2893 	if (em_cached && !IS_ERR_OR_NULL(em)) {  in __get_extent_map()
2895 		atomic_inc(&em->refs);  in __get_extent_map()
2896 		*em_cached = em;  in __get_extent_map()
2898 	return em;  in __get_extent_map()
2924 	struct extent_map *em;  in __do_readpage()  local
2979 		em = __get_extent_map(inode, page, pg_offset, cur,  in __do_readpage()
2981 		if (IS_ERR_OR_NULL(em)) {  in __do_readpage()
2987 		extent_offset = cur - em->start;  in __do_readpage()
2988 		BUG_ON(extent_map_end(em) <= cur);  in __do_readpage()
2991 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in __do_readpage()
2994 						 em->compress_type);  in __do_readpage()
2997 		iosize = min(extent_map_end(em) - cur, end - cur + 1);  in __do_readpage()
2998 		cur_end = min(extent_map_end(em) - 1, end);  in __do_readpage()
3001 			disk_io_size = em->block_len;  in __do_readpage()
3002 			sector = em->block_start >> 9;  in __do_readpage()
3004 			sector = (em->block_start + extent_offset) >> 9;  in __do_readpage()
3007 		bdev = em->bdev;  in __do_readpage()
3008 		block_start = em->block_start;  in __do_readpage()
3009 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in __do_readpage()
3046 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) &&  in __do_readpage()
3048 		    *prev_em_start != em->orig_start)  in __do_readpage()
3052 			*prev_em_start = em->orig_start;  in __do_readpage()
3054 		free_extent_map(em);  in __do_readpage()
3055 		em = NULL;  in __do_readpage()
3381 	struct extent_map *em;  in __extent_writepage_io()  local
3430 		em = epd->get_extent(inode, page, pg_offset, cur,  in __extent_writepage_io()
3432 		if (IS_ERR_OR_NULL(em)) {  in __extent_writepage_io()
3434 			ret = PTR_ERR_OR_ZERO(em);  in __extent_writepage_io()
3438 		extent_offset = cur - em->start;  in __extent_writepage_io()
3439 		em_end = extent_map_end(em);  in __extent_writepage_io()
3444 		sector = (em->block_start + extent_offset) >> 9;  in __extent_writepage_io()
3445 		bdev = em->bdev;  in __extent_writepage_io()
3446 		block_start = em->block_start;  in __extent_writepage_io()
3447 		compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);  in __extent_writepage_io()
3448 		free_extent_map(em);  in __extent_writepage_io()
3449 		em = NULL;  in __extent_writepage_io()
4313 	struct extent_map *em;  in try_release_extent_mapping()  local
4323 			em = lookup_extent_mapping(map, start, len);  in try_release_extent_mapping()
4324 			if (!em) {  in try_release_extent_mapping()
4328 			if (test_bit(EXTENT_FLAG_PINNED, &em->flags) ||  in try_release_extent_mapping()
4329 			    em->start != start) {  in try_release_extent_mapping()
4331 				free_extent_map(em);  in try_release_extent_mapping()
4334 			if (!test_range_bit(tree, em->start,  in try_release_extent_mapping()
4335 					    extent_map_end(em) - 1,  in try_release_extent_mapping()
4338 				remove_extent_mapping(map, em);  in try_release_extent_mapping()
4340 				free_extent_map(em);  in try_release_extent_mapping()
4342 			start = extent_map_end(em);  in try_release_extent_mapping()
4346 			free_extent_map(em);  in try_release_extent_mapping()
4362 	struct extent_map *em;  in get_extent_skip_holes()  local
4373 		em = get_extent(inode, NULL, 0, offset, len, 0);  in get_extent_skip_holes()
4374 		if (IS_ERR_OR_NULL(em))  in get_extent_skip_holes()
4375 			return em;  in get_extent_skip_holes()
4378 		if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags) &&  in get_extent_skip_holes()
4379 		    em->block_start != EXTENT_MAP_HOLE) {  in get_extent_skip_holes()
4380 			return em;  in get_extent_skip_holes()
4384 		offset = extent_map_end(em);  in get_extent_skip_holes()
4385 		free_extent_map(em);  in get_extent_skip_holes()
4405 	struct extent_map *em = NULL;  in extent_fiemap()  local
4470 	em = get_extent_skip_holes(inode, start, last_for_get_extent,  in extent_fiemap()
4472 	if (!em)  in extent_fiemap()
4474 	if (IS_ERR(em)) {  in extent_fiemap()
4475 		ret = PTR_ERR(em);  in extent_fiemap()
4483 		if (em->start >= max || extent_map_end(em) < off)  in extent_fiemap()
4492 		em_start = max(em->start, off);  in extent_fiemap()
4500 		if (!test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))  in extent_fiemap()
4501 			offset_in_extent = em_start - em->start;  in extent_fiemap()
4502 		em_end = extent_map_end(em);  in extent_fiemap()
4510 		off = extent_map_end(em);  in extent_fiemap()
4514 		if (em->block_start == EXTENT_MAP_LAST_BYTE) {  in extent_fiemap()
4517 		} else if (em->block_start == EXTENT_MAP_INLINE) {  in extent_fiemap()
4520 		} else if (em->block_start == EXTENT_MAP_DELALLOC) {  in extent_fiemap()
4524 			u64 bytenr = em->block_start -  in extent_fiemap()
4525 				(em->start - em->orig_start);  in extent_fiemap()
4527 			disko = em->block_start + offset_in_extent;  in extent_fiemap()
4545 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))  in extent_fiemap()
4548 		free_extent_map(em);  in extent_fiemap()
4549 		em = NULL;  in extent_fiemap()
4557 		em = get_extent_skip_holes(inode, off, last_for_get_extent,  in extent_fiemap()
4559 		if (IS_ERR(em)) {  in extent_fiemap()
4560 			ret = PTR_ERR(em);  in extent_fiemap()
4563 		if (!em) {  in extent_fiemap()
4576 	free_extent_map(em);  in extent_fiemap()