521 	struct extent_buffer *leaf;  in btrfs_drop_extents()  local
571 			leaf = path->nodes[0];  in btrfs_drop_extents()
572 			btrfs_item_key_to_cpu(leaf, &key, path->slots[0] - 1);  in btrfs_drop_extents()
579 		leaf = path->nodes[0];  in btrfs_drop_extents()
580 		if (path->slots[0] >= btrfs_header_nritems(leaf)) {  in btrfs_drop_extents()
589 			leaf = path->nodes[0];  in btrfs_drop_extents()
593 		btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);  in btrfs_drop_extents()
606 		fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_drop_extents()
608 		extent_type = btrfs_file_extent_type(leaf, fi);  in btrfs_drop_extents()
612 			disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);  in btrfs_drop_extents()
613 			num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);  in btrfs_drop_extents()
614 			extent_offset = btrfs_file_extent_offset(leaf, fi);  in btrfs_drop_extents()
616 				btrfs_file_extent_num_bytes(leaf, fi);  in btrfs_drop_extents()
619 				btrfs_file_extent_ram_bytes(leaf, fi);  in btrfs_drop_extents()
674 			leaf = path->nodes[0];  in btrfs_drop_extents()
675 			fi = btrfs_item_ptr(leaf, path->slots[0] - 1,  in btrfs_drop_extents()
677 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_drop_extents()
680 			fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_drop_extents()
684 			btrfs_set_file_extent_offset(leaf, fi, extent_offset);  in btrfs_drop_extents()
685 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_drop_extents()
687 			btrfs_mark_buffer_dirty(leaf);  in btrfs_drop_extents()
724 			btrfs_set_file_extent_offset(leaf, fi, extent_offset);  in btrfs_drop_extents()
725 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_drop_extents()
727 			btrfs_mark_buffer_dirty(leaf);  in btrfs_drop_extents()
745 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_drop_extents()
747 			btrfs_mark_buffer_dirty(leaf);  in btrfs_drop_extents()
793 			if (path->slots[0] + 1 < btrfs_header_nritems(leaf)) {  in btrfs_drop_extents()
828 	leaf = path->nodes[0];  in btrfs_drop_extents()
836 	    btrfs_leaf_free_space(leaf) >=  in btrfs_drop_extents()
842 		if (!del_nr && path->slots[0] < btrfs_header_nritems(leaf)) {  in btrfs_drop_extents()
845 			btrfs_item_key_to_cpu(leaf, &slot_key, path->slots[0]);  in btrfs_drop_extents()
863 static int extent_mergeable(struct extent_buffer *leaf, int slot,  in extent_mergeable()  argument
871 	if (slot < 0 || slot >= btrfs_header_nritems(leaf))  in extent_mergeable()
874 	btrfs_item_key_to_cpu(leaf, &key, slot);  in extent_mergeable()
878 	fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);  in extent_mergeable()
879 	if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_REG ||  in extent_mergeable()
880 	    btrfs_file_extent_disk_bytenr(leaf, fi) != bytenr ||  in extent_mergeable()
881 	    btrfs_file_extent_offset(leaf, fi) != key.offset - orig_offset ||  in extent_mergeable()
882 	    btrfs_file_extent_compression(leaf, fi) ||  in extent_mergeable()
883 	    btrfs_file_extent_encryption(leaf, fi) ||  in extent_mergeable()
884 	    btrfs_file_extent_other_encoding(leaf, fi))  in extent_mergeable()
887 	extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);  in extent_mergeable()
908 	struct extent_buffer *leaf;  in btrfs_mark_extent_written()  local
943 	leaf = path->nodes[0];  in btrfs_mark_extent_written()
944 	btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);  in btrfs_mark_extent_written()
951 	fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_mark_extent_written()
953 	if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_PREALLOC) {  in btrfs_mark_extent_written()
958 	extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);  in btrfs_mark_extent_written()
965 	bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);  in btrfs_mark_extent_written()
966 	num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);  in btrfs_mark_extent_written()
967 	orig_offset = key.offset - btrfs_file_extent_offset(leaf, fi);  in btrfs_mark_extent_written()
973 		if (extent_mergeable(leaf, path->slots[0] - 1,  in btrfs_mark_extent_written()
978 			fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_mark_extent_written()
980 			btrfs_set_file_extent_generation(leaf, fi,  in btrfs_mark_extent_written()
982 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
984 			btrfs_set_file_extent_offset(leaf, fi,  in btrfs_mark_extent_written()
986 			fi = btrfs_item_ptr(leaf, path->slots[0] - 1,  in btrfs_mark_extent_written()
988 			btrfs_set_file_extent_generation(leaf, fi,  in btrfs_mark_extent_written()
990 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
992 			btrfs_mark_buffer_dirty(leaf);  in btrfs_mark_extent_written()
1000 		if (extent_mergeable(leaf, path->slots[0] + 1,  in btrfs_mark_extent_written()
1003 			fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_mark_extent_written()
1005 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
1007 			btrfs_set_file_extent_generation(leaf, fi,  in btrfs_mark_extent_written()
1013 			fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_mark_extent_written()
1015 			btrfs_set_file_extent_generation(leaf, fi,  in btrfs_mark_extent_written()
1017 			btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
1019 			btrfs_set_file_extent_offset(leaf, fi,  in btrfs_mark_extent_written()
1021 			btrfs_mark_buffer_dirty(leaf);  in btrfs_mark_extent_written()
1041 		leaf = path->nodes[0];  in btrfs_mark_extent_written()
1042 		fi = btrfs_item_ptr(leaf, path->slots[0] - 1,  in btrfs_mark_extent_written()
1044 		btrfs_set_file_extent_generation(leaf, fi, trans->transid);  in btrfs_mark_extent_written()
1045 		btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
1048 		fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_mark_extent_written()
1051 		btrfs_set_file_extent_generation(leaf, fi, trans->transid);  in btrfs_mark_extent_written()
1052 		btrfs_set_file_extent_offset(leaf, fi, split - orig_offset);  in btrfs_mark_extent_written()
1053 		btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
1055 		btrfs_mark_buffer_dirty(leaf);  in btrfs_mark_extent_written()
1087 	if (extent_mergeable(leaf, path->slots[0] + 1,  in btrfs_mark_extent_written()
1105 	if (extent_mergeable(leaf, path->slots[0] - 1,  in btrfs_mark_extent_written()
1122 		fi = btrfs_item_ptr(leaf, path->slots[0],  in btrfs_mark_extent_written()
1124 		btrfs_set_file_extent_type(leaf, fi,  in btrfs_mark_extent_written()
1126 		btrfs_set_file_extent_generation(leaf, fi, trans->transid);  in btrfs_mark_extent_written()
1127 		btrfs_mark_buffer_dirty(leaf);  in btrfs_mark_extent_written()
1129 		fi = btrfs_item_ptr(leaf, del_slot - 1,  in btrfs_mark_extent_written()
1131 		btrfs_set_file_extent_type(leaf, fi,  in btrfs_mark_extent_written()
1133 		btrfs_set_file_extent_generation(leaf, fi, trans->transid);  in btrfs_mark_extent_written()
1134 		btrfs_set_file_extent_num_bytes(leaf, fi,  in btrfs_mark_extent_written()
1136 		btrfs_mark_buffer_dirty(leaf);  in btrfs_mark_extent_written()
2339 static int hole_mergeable(struct btrfs_inode *inode, struct extent_buffer *leaf,  in hole_mergeable()  argument
2345 	if (slot < 0 || slot >= btrfs_header_nritems(leaf))  in hole_mergeable()
2348 	btrfs_item_key_to_cpu(leaf, &key, slot);  in hole_mergeable()
2353 	fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);  in hole_mergeable()
2355 	if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_REG)  in hole_mergeable()
2358 	if (btrfs_file_extent_disk_bytenr(leaf, fi))  in hole_mergeable()
2363 	if (key.offset + btrfs_file_extent_num_bytes(leaf, fi) == start)  in hole_mergeable()
2374 	struct extent_buffer *leaf;  in fill_holes()  local
2398 	leaf = path->nodes[0];  in fill_holes()
2399 	if (hole_mergeable(inode, leaf, path->slots[0] - 1, offset, end)) {  in fill_holes()
2403 		fi = btrfs_item_ptr(leaf, path->slots[0],  in fill_holes()
2405 		num_bytes = btrfs_file_extent_num_bytes(leaf, fi) +  in fill_holes()
2407 		btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);  in fill_holes()
2408 		btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);  in fill_holes()
2409 		btrfs_set_file_extent_offset(leaf, fi, 0);  in fill_holes()
2410 		btrfs_set_file_extent_generation(leaf, fi, trans->transid);  in fill_holes()
2411 		btrfs_mark_buffer_dirty(leaf);  in fill_holes()
2415 	if (hole_mergeable(inode, leaf, path->slots[0], offset, end)) {  in fill_holes()
2420 		fi = btrfs_item_ptr(leaf, path->slots[0],  in fill_holes()
2422 		num_bytes = btrfs_file_extent_num_bytes(leaf, fi) + end -  in fill_holes()
2424 		btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);  in fill_holes()
2425 		btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);  in fill_holes()
2426 		btrfs_set_file_extent_offset(leaf, fi, 0);  in fill_holes()
2427 		btrfs_set_file_extent_generation(leaf, fi, trans->transid);  in fill_holes()
2428 		btrfs_mark_buffer_dirty(leaf);  in fill_holes()
2547 	struct extent_buffer *leaf;  in btrfs_insert_replace_extent()  local
2569 	leaf = path->nodes[0];  in btrfs_insert_replace_extent()
2571 	write_extent_buffer(leaf, extent_info->extent_buf,  in btrfs_insert_replace_extent()
2572 			    btrfs_item_ptr_offset(leaf, slot),  in btrfs_insert_replace_extent()
2574 	extent = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);  in btrfs_insert_replace_extent()
2575 	ASSERT(btrfs_file_extent_type(leaf, extent) != BTRFS_FILE_EXTENT_INLINE);  in btrfs_insert_replace_extent()
2576 	btrfs_set_file_extent_offset(leaf, extent, extent_info->data_offset);  in btrfs_insert_replace_extent()
2577 	btrfs_set_file_extent_num_bytes(leaf, extent, replace_len);  in btrfs_insert_replace_extent()
2579 		btrfs_set_file_extent_generation(leaf, extent, trans->transid);  in btrfs_insert_replace_extent()
2580 	btrfs_mark_buffer_dirty(leaf);  in btrfs_insert_replace_extent()
3832 		struct extent_buffer *leaf = path->nodes[0];  in find_desired_extent()  local
3836 		if (path->slots[0] >= btrfs_header_nritems(leaf)) {  in find_desired_extent()
3843 			leaf = path->nodes[0];  in find_desired_extent()
3846 		btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);  in find_desired_extent()
3887 		extent = btrfs_item_ptr(leaf, path->slots[0],  in find_desired_extent()
3890 		if (btrfs_file_extent_disk_bytenr(leaf, extent) == 0 ||  in find_desired_extent()
3891 		    btrfs_file_extent_type(leaf, extent) ==  in find_desired_extent()