btrfs: rename the bytenr field in struct btrfs_ordered_sum to logical

btrfs_ordered_sum::bytendr stores a logical address.  Make that clear by
renaming it to ->logical.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/file-item.c

@@ -560,7 +560,7 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
 				goto fail;
 			}
 
-			sums->bytenr = start;
+			sums->logical = start;
 			sums->len = size;
 
 			offset = bytes_to_csum_size(fs_info, start - key.offset);
@@ -749,7 +749,7 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio)
 	sums->len = bio->bi_iter.bi_size;
 	INIT_LIST_HEAD(&sums->list);
 
-	sums->bytenr = bio->bi_iter.bi_sector << SECTOR_SHIFT;
+	sums->logical = bio->bi_iter.bi_sector << SECTOR_SHIFT;
 	index = 0;
 
 	shash->tfm = fs_info->csum_shash;
@@ -799,7 +799,7 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio)
 				ordered = btrfs_lookup_ordered_extent(inode,
 								offset);
 				ASSERT(ordered); /* Logic error */
-				sums->bytenr = (bio->bi_iter.bi_sector << SECTOR_SHIFT)
+				sums->logical = (bio->bi_iter.bi_sector << SECTOR_SHIFT)
 					+ total_bytes;
 				index = 0;
 			}
@@ -1086,7 +1086,7 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
 again:
 	next_offset = (u64)-1;
 	found_next = 0;
-	bytenr = sums->bytenr + total_bytes;
+	bytenr = sums->logical + total_bytes;
 	file_key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
 	file_key.offset = bytenr;
 	file_key.type = BTRFS_EXTENT_CSUM_KEY;

fs/btrfs/inode.c

@@ -2850,7 +2850,7 @@ static int add_pending_csums(struct btrfs_trans_handle *trans,
 		trans->adding_csums = true;
 		if (!csum_root)
 			csum_root = btrfs_csum_root(trans->fs_info,
-						    sum->bytenr);
+						    sum->logical);
 		ret = btrfs_csum_file_blocks(trans, csum_root, sum);
 		trans->adding_csums = false;
 		if (ret)

fs/btrfs/ordered-data.h

@@ -14,13 +14,13 @@ struct btrfs_ordered_inode_tree {
 };
 
 struct btrfs_ordered_sum {
-	/* bytenr is the start of this extent on disk */
-	u64 bytenr;
-
 	/*
-	 * this is the length in bytes covered by the sums array below.
+	 * Logical start address and length for of the blocks covered by
+	 * the sums array.
 	 */
+	u64 logical;
 	u32 len;
+
 	struct list_head list;
 	/* last field is a variable length array of csums */
 	u8 sums[];

fs/btrfs/relocation.c

@@ -4379,8 +4379,8 @@ int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len)
 		 * disk_len vs real len like with real inodes since it's all
 		 * disk length.
 		 */
-		new_bytenr = ordered->disk_bytenr + sums->bytenr - disk_bytenr;
-		sums->bytenr = new_bytenr;
+		new_bytenr = ordered->disk_bytenr + sums->logical - disk_bytenr;
+		sums->logical = new_bytenr;
 
 		btrfs_add_ordered_sum(ordered, sums);
 	}

fs/btrfs/tree-log.c

@@ -859,10 +859,10 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
 						struct btrfs_ordered_sum,
 						list);
 				csum_root = btrfs_csum_root(fs_info,
-							    sums->bytenr);
+							    sums->logical);
 				if (!ret)
 					ret = btrfs_del_csums(trans, csum_root,
-							      sums->bytenr,
+							      sums->logical,
 							      sums->len);
 				if (!ret)
 					ret = btrfs_csum_file_blocks(trans,
@@ -4221,7 +4221,7 @@ static int log_csums(struct btrfs_trans_handle *trans,
 		     struct btrfs_root *log_root,
 		     struct btrfs_ordered_sum *sums)
 {
-	const u64 lock_end = sums->bytenr + sums->len - 1;
+	const u64 lock_end = sums->logical + sums->len - 1;
 	struct extent_state *cached_state = NULL;
 	int ret;
 
@@ -4239,7 +4239,7 @@ static int log_csums(struct btrfs_trans_handle *trans,
 	 * file which happens to refer to the same extent as well. Such races
 	 * can leave checksum items in the log with overlapping ranges.
 	 */
-	ret = lock_extent(&log_root->log_csum_range, sums->bytenr, lock_end,
+	ret = lock_extent(&log_root->log_csum_range, sums->logical, lock_end,
 			  &cached_state);
 	if (ret)
 		return ret;
@@ -4252,11 +4252,11 @@ static int log_csums(struct btrfs_trans_handle *trans,
 	 * some checksums missing in the fs/subvolume tree. So just delete (or
 	 * trim and adjust) any existing csum items in the log for this range.
 	 */
-	ret = btrfs_del_csums(trans, log_root, sums->bytenr, sums->len);
+	ret = btrfs_del_csums(trans, log_root, sums->logical, sums->len);
 	if (!ret)
 		ret = btrfs_csum_file_blocks(trans, log_root, sums);
 
-	unlock_extent(&log_root->log_csum_range, sums->bytenr, lock_end,
+	unlock_extent(&log_root->log_csum_range, sums->logical, lock_end,
 		      &cached_state);
 
 	return ret;

fs/btrfs/zoned.c

@@ -1711,9 +1711,9 @@ void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered)
 
 	list_for_each_entry(sum, &ordered->list, list) {
 		if (logical < orig_logical)
-			sum->bytenr -= orig_logical - logical;
+			sum->logical -= orig_logical - logical;
 		else
-			sum->bytenr += logical - orig_logical;
+			sum->logical += logical - orig_logical;
 	}
 }