534 	struct extent_map *em;  in btrfs_drop_extent_cache()  local
563 		em = lookup_extent_mapping(em_tree, start, len);  in btrfs_drop_extent_cache()
564 		if (!em) {  in btrfs_drop_extent_cache()
568 		flags = em->flags;  in btrfs_drop_extent_cache()
569 		gen = em->generation;  in btrfs_drop_extent_cache()
570 		if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) {  in btrfs_drop_extent_cache()
571 			if (testend && em->start + em->len >= start + len) {  in btrfs_drop_extent_cache()
572 				free_extent_map(em);  in btrfs_drop_extent_cache()
576 			start = em->start + em->len;  in btrfs_drop_extent_cache()
578 				len = start + len - (em->start + em->len);  in btrfs_drop_extent_cache()
579 			free_extent_map(em);  in btrfs_drop_extent_cache()
583 		compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);  in btrfs_drop_extent_cache()
584 		clear_bit(EXTENT_FLAG_PINNED, &em->flags);  in btrfs_drop_extent_cache()
586 		modified = !list_empty(&em->list);  in btrfs_drop_extent_cache()
590 		if (em->start < start) {  in btrfs_drop_extent_cache()
591 			split->start = em->start;  in btrfs_drop_extent_cache()
592 			split->len = start - em->start;  in btrfs_drop_extent_cache()
594 			if (em->block_start < EXTENT_MAP_LAST_BYTE) {  in btrfs_drop_extent_cache()
595 				split->orig_start = em->orig_start;  in btrfs_drop_extent_cache()
596 				split->block_start = em->block_start;  in btrfs_drop_extent_cache()
599 					split->block_len = em->block_len;  in btrfs_drop_extent_cache()
603 						em->orig_block_len);  in btrfs_drop_extent_cache()
604 				split->ram_bytes = em->ram_bytes;  in btrfs_drop_extent_cache()
608 				split->block_start = em->block_start;  in btrfs_drop_extent_cache()
614 			split->bdev = em->bdev;  in btrfs_drop_extent_cache()
616 			split->compress_type = em->compress_type;  in btrfs_drop_extent_cache()
617 			replace_extent_mapping(em_tree, em, split, modified);  in btrfs_drop_extent_cache()
622 		if (testend && em->start + em->len > start + len) {  in btrfs_drop_extent_cache()
623 			u64 diff = start + len - em->start;  in btrfs_drop_extent_cache()
626 			split->len = em->start + em->len - (start + len);  in btrfs_drop_extent_cache()
627 			split->bdev = em->bdev;  in btrfs_drop_extent_cache()
629 			split->compress_type = em->compress_type;  in btrfs_drop_extent_cache()
632 			if (em->block_start < EXTENT_MAP_LAST_BYTE) {  in btrfs_drop_extent_cache()
633 				split->orig_block_len = max(em->block_len,  in btrfs_drop_extent_cache()
634 						    em->orig_block_len);  in btrfs_drop_extent_cache()
636 				split->ram_bytes = em->ram_bytes;  in btrfs_drop_extent_cache()
638 					split->block_len = em->block_len;  in btrfs_drop_extent_cache()
639 					split->block_start = em->block_start;  in btrfs_drop_extent_cache()
640 					split->orig_start = em->orig_start;  in btrfs_drop_extent_cache()
643 					split->block_start = em->block_start  in btrfs_drop_extent_cache()
645 					split->orig_start = em->orig_start;  in btrfs_drop_extent_cache()
651 				split->block_start = em->block_start;  in btrfs_drop_extent_cache()
655 			if (extent_map_in_tree(em)) {  in btrfs_drop_extent_cache()
656 				replace_extent_mapping(em_tree, em, split,  in btrfs_drop_extent_cache()
667 		if (extent_map_in_tree(em))  in btrfs_drop_extent_cache()
668 			remove_extent_mapping(em_tree, em);  in btrfs_drop_extent_cache()
672 		free_extent_map(em);  in btrfs_drop_extent_cache()
674 		free_extent_map(em);  in btrfs_drop_extent_cache()
2234 	struct extent_map *em;  in find_first_non_hole()  local
2237 	em = btrfs_get_extent(inode, NULL, 0, *start, *len, 0);  in find_first_non_hole()
2238 	if (IS_ERR_OR_NULL(em)) {  in find_first_non_hole()
2239 		if (!em)  in find_first_non_hole()
2242 			ret = PTR_ERR(em);  in find_first_non_hole()
2247 	if (em->block_start == EXTENT_MAP_HOLE) {  in find_first_non_hole()
2249 		*len = em->start + em->len > *start + *len ?  in find_first_non_hole()
2250 		       0 : *start + *len - em->start - em->len;  in find_first_non_hole()
2251 		*start = em->start + em->len;  in find_first_non_hole()
2253 	free_extent_map(em);  in find_first_non_hole()
2560 	struct extent_map *em;  in btrfs_fallocate()  local
2649 		em = btrfs_get_extent(inode, NULL, 0, cur_offset,  in btrfs_fallocate()
2651 		if (IS_ERR_OR_NULL(em)) {  in btrfs_fallocate()
2652 			if (!em)  in btrfs_fallocate()
2655 				ret = PTR_ERR(em);  in btrfs_fallocate()
2658 		last_byte = min(extent_map_end(em), alloc_end);  in btrfs_fallocate()
2659 		actual_end = min_t(u64, extent_map_end(em), offset + len);  in btrfs_fallocate()
2662 		if (em->block_start == EXTENT_MAP_HOLE ||  in btrfs_fallocate()
2664 		     !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {  in btrfs_fallocate()
2696 		free_extent_map(em);  in btrfs_fallocate()
2718 	struct extent_map *em = NULL;  in find_desired_extent()  local
2746 		em = btrfs_get_extent_fiemap(inode, NULL, 0, start, len, 0);  in find_desired_extent()
2747 		if (IS_ERR(em)) {  in find_desired_extent()
2748 			ret = PTR_ERR(em);  in find_desired_extent()
2749 			em = NULL;  in find_desired_extent()
2754 		    (em->block_start == EXTENT_MAP_HOLE ||  in find_desired_extent()
2755 		     test_bit(EXTENT_FLAG_PREALLOC, &em->flags)))  in find_desired_extent()
2758 			   (em->block_start != EXTENT_MAP_HOLE &&  in find_desired_extent()
2759 			    !test_bit(EXTENT_FLAG_PREALLOC, &em->flags)))  in find_desired_extent()
2762 		start = em->start + em->len;  in find_desired_extent()
2763 		free_extent_map(em);  in find_desired_extent()
2764 		em = NULL;  in find_desired_extent()
2767 	free_extent_map(em);  in find_desired_extent()