Btrfs: don't bother committing delayed inode updates when fsyncing

We can just copy the in memory inode into the tree log directly, no sense in
updating the fs tree so we can copy it into the tree log tree.  Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

fs/btrfs/tree-log.c

@@ -2944,6 +2944,55 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
 	return ret;
 }
 
+static void fill_inode_item(struct btrfs_trans_handle *trans,
+			    struct extent_buffer *leaf,
+			    struct btrfs_inode_item *item,
+			    struct inode *inode, int log_inode_only)
+{
+	btrfs_set_inode_uid(leaf, item, inode->i_uid);
+	btrfs_set_inode_gid(leaf, item, inode->i_gid);
+	btrfs_set_inode_mode(leaf, item, inode->i_mode);
+	btrfs_set_inode_nlink(leaf, item, inode->i_nlink);
+
+	btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item),
+			       inode->i_atime.tv_sec);
+	btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item),
+				inode->i_atime.tv_nsec);
+
+	btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item),
+			       inode->i_mtime.tv_sec);
+	btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item),
+				inode->i_mtime.tv_nsec);
+
+	btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item),
+			       inode->i_ctime.tv_sec);
+	btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item),
+				inode->i_ctime.tv_nsec);
+
+	btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode));
+
+	btrfs_set_inode_sequence(leaf, item, inode->i_version);
+	btrfs_set_inode_transid(leaf, item, trans->transid);
+	btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
+	btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags);
+	btrfs_set_inode_block_group(leaf, item, 0);
+
+	if (log_inode_only) {
+		/* set the generation to zero so the recover code
+		 * can tell the difference between an logging
+		 * just to say 'this inode exists' and a logging
+		 * to say 'update this inode with these values'
+		 */
+		btrfs_set_inode_generation(leaf, item, 0);
+		btrfs_set_inode_size(leaf, item, 0);
+	} else {
+		btrfs_set_inode_generation(leaf, item,
+					   BTRFS_I(inode)->generation);
+		btrfs_set_inode_size(leaf, item, inode->i_size);
+	}
+
+}
+
 static noinline int copy_items(struct btrfs_trans_handle *trans,
 			       struct inode *inode,
 			       struct btrfs_path *dst_path,
@@ -2990,24 +3039,17 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
 
 		src_offset = btrfs_item_ptr_offset(src, start_slot + i);
 
-		copy_extent_buffer(dst_path->nodes[0], src, dst_offset,
-				   src_offset, ins_sizes[i]);
-
-		if (inode_only == LOG_INODE_EXISTS &&
-		    ins_keys[i].type == BTRFS_INODE_ITEM_KEY) {
+		if (ins_keys[i].type == BTRFS_INODE_ITEM_KEY) {
 			inode_item = btrfs_item_ptr(dst_path->nodes[0],
 						    dst_path->slots[0],
 						    struct btrfs_inode_item);
-			btrfs_set_inode_size(dst_path->nodes[0], inode_item, 0);
-
-			/* set the generation to zero so the recover code
-			 * can tell the difference between an logging
-			 * just to say 'this inode exists' and a logging
-			 * to say 'update this inode with these values'
-			 */
-			btrfs_set_inode_generation(dst_path->nodes[0],
-						   inode_item, 0);
+			fill_inode_item(trans, dst_path->nodes[0], inode_item,
+					inode, inode_only == LOG_INODE_EXISTS);
+		} else {
+			copy_extent_buffer(dst_path->nodes[0], src, dst_offset,
+					   src_offset, ins_sizes[i]);
 		}
+
 		/* take a reference on file data extents so that truncates
 		 * or deletes of this inode don't have to relog the inode
 		 * again
@@ -3361,11 +3403,15 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
 		max_key.type = (u8)-1;
 	max_key.offset = (u64)-1;
 
-	ret = btrfs_commit_inode_delayed_items(trans, inode);
-	if (ret) {
-		btrfs_free_path(path);
-		btrfs_free_path(dst_path);
-		return ret;
+	/* Only run delayed items if we are a dir or a new file */
+	if (S_ISDIR(inode->i_mode) ||
+	    BTRFS_I(inode)->generation > root->fs_info->last_trans_committed) {
+		ret = btrfs_commit_inode_delayed_items(trans, inode);
+		if (ret) {
+			btrfs_free_path(path);
+			btrfs_free_path(dst_path);
+			return ret;
+		}
 	}
 
 	mutex_lock(&BTRFS_I(inode)->log_mutex);