fs/adfs: newdir: split out directory commit from update

After changing a directory, we need to update the sequence numbers and
calculate the new check byte before the directory is scheduled to be
written back to the media.  Since this needs to happen for any change
to the directory, move this into a separate method.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/adfs/adfs.h

@@ -130,6 +130,7 @@ struct adfs_dir_ops {
 	int	(*update)(struct adfs_dir *dir, struct object_info *obj);
 	int	(*create)(struct adfs_dir *dir, struct object_info *obj);
 	int	(*remove)(struct adfs_dir *dir, struct object_info *obj);
+	int	(*commit)(struct adfs_dir *dir);
 };
 
 struct adfs_discmap {

fs/adfs/dir.c

@@ -293,6 +293,10 @@ adfs_dir_update(struct super_block *sb, struct object_info *obj, int wait)
 		goto unlock;
 
 	ret = ops->update(&dir, obj);
+	if (ret)
+		goto forget;
+
+	ret = ops->commit(&dir);
 	if (ret)
 		goto forget;
 	up_write(&adfs_dir_rwsem);

fs/adfs/dir_f.c

@@ -292,25 +292,24 @@ static int adfs_f_update(struct adfs_dir *dir, struct object_info *obj)
 	adfs_obj2dir(&de, obj);
 
 	/* Write the directory entry back to the directory */
-	ret = adfs_dir_copyto(dir, pos, &de, 26);
-	if (ret)
-		return ret;
- 
-	/*
-	 * Increment directory sequence number
-	 */
+	return adfs_dir_copyto(dir, offset, &de, 26);
+}
+
+static int adfs_f_commit(struct adfs_dir *dir)
+{
+	int ret;
+
+	/* Increment directory sequence number */
 	dir->dirhead->startmasseq += 1;
 	dir->newtail->endmasseq += 1;
 
-	ret = adfs_dir_checkbyte(dir);
-	/*
-	 * Update directory check byte
-	 */
-	dir->newtail->dircheckbyte = ret;
+	/* Update directory check byte */
+	dir->newtail->dircheckbyte = adfs_dir_checkbyte(dir);
 
+	/* Make sure the directory still validates correctly */
 	ret = adfs_f_validate(dir);
 	if (ret)
-		adfs_error(dir->sb, "whoops!  I broke a directory!");
+		adfs_msg(dir->sb, KERN_ERR, "error: update broke directory");
 
 	return ret;
 }
@@ -321,4 +320,5 @@ const struct adfs_dir_ops adfs_f_dir_ops = {
 	.setpos		= adfs_f_setpos,
 	.getnext	= adfs_f_getnext,
 	.update		= adfs_f_update,
+	.commit		= adfs_f_commit,
 };