144 	struct extent_map *em = NULL;  in btrfs_create_dio_extent()  local
148 		em = btrfs_create_io_em(inode, start, file_extent, type);  in btrfs_create_dio_extent()
149 		if (IS_ERR(em))  in btrfs_create_dio_extent()
157 		if (em) {  in btrfs_create_dio_extent()
158 			btrfs_free_extent_map(em);  in btrfs_create_dio_extent()
162 		em = ERR_CAST(ordered);  in btrfs_create_dio_extent()
169 	return em;  in btrfs_create_dio_extent()
179 	struct extent_map *em;  in btrfs_new_extent_direct()  local
203 	em = btrfs_create_dio_extent(inode, dio_data, start, &file_extent,  in btrfs_new_extent_direct()
206 	if (IS_ERR(em))  in btrfs_new_extent_direct()
209 	return em;  in btrfs_new_extent_direct()
221 	struct extent_map *em = *map;  in btrfs_get_blocks_direct_write()  local
240 	if ((em->flags & EXTENT_FLAG_PREALLOC) ||  in btrfs_get_blocks_direct_write()
242 	     em->disk_bytenr != EXTENT_MAP_HOLE)) {  in btrfs_get_blocks_direct_write()
243 		if (em->flags & EXTENT_FLAG_PREALLOC)  in btrfs_get_blocks_direct_write()
247 		len = min(len, em->len - (start - em->start));  in btrfs_get_blocks_direct_write()
248 		block_start = btrfs_extent_map_block_start(em) + (start - em->start);  in btrfs_get_blocks_direct_write()
267 			btrfs_free_extent_map(em);  in btrfs_get_blocks_direct_write()
280 			btrfs_free_extent_map(em);  in btrfs_get_blocks_direct_write()
282 			em = em2;  in btrfs_get_blocks_direct_write()
293 		btrfs_free_extent_map(em);  in btrfs_get_blocks_direct_write()
320 		em = btrfs_new_extent_direct(BTRFS_I(inode), dio_data, start, len);  in btrfs_get_blocks_direct_write()
321 		if (IS_ERR(em)) {  in btrfs_get_blocks_direct_write()
322 			ret = PTR_ERR(em);  in btrfs_get_blocks_direct_write()
325 		*map = em;  in btrfs_get_blocks_direct_write()
326 		len = min(len, em->len - (start - em->start));  in btrfs_get_blocks_direct_write()
359 	struct extent_map *em;  in btrfs_dio_iomap_begin()  local
456 	em = btrfs_get_extent(BTRFS_I(inode), NULL, start, len);  in btrfs_dio_iomap_begin()
457 	if (IS_ERR(em)) {  in btrfs_dio_iomap_begin()
458 		ret = PTR_ERR(em);  in btrfs_dio_iomap_begin()
476 	if (btrfs_extent_map_is_compressed(em) || em->disk_bytenr == EXTENT_MAP_INLINE) {  in btrfs_dio_iomap_begin()
477 		btrfs_free_extent_map(em);  in btrfs_dio_iomap_begin()
494 	len = min(len, em->len - (start - em->start));  in btrfs_dio_iomap_begin()
518 		btrfs_free_extent_map(em);  in btrfs_dio_iomap_begin()
524 		ret = btrfs_get_blocks_direct_write(&em, inode, dio_data,  in btrfs_dio_iomap_begin()
528 		/* Recalc len in case the new em is smaller than requested */  in btrfs_dio_iomap_begin()
529 		len = min(len, em->len - (start - em->start));  in btrfs_dio_iomap_begin()
555 	if ((em->disk_bytenr == EXTENT_MAP_HOLE) ||  in btrfs_dio_iomap_begin()
556 	    ((em->flags & EXTENT_FLAG_PREALLOC) && !write)) {  in btrfs_dio_iomap_begin()
560 		iomap->addr = btrfs_extent_map_block_start(em) + (start - em->start);  in btrfs_dio_iomap_begin()
566 	btrfs_free_extent_map(em);  in btrfs_dio_iomap_begin()