UBIFS: fix budgeting calculations

The 'ubifs_release_dirty_inode_budget()' was buggy and incorrectly
freed the budget, which led to not freeing all dirty data budget.
This patch fixes that.

Also, this patch fixes ubifs_mkdir() which passed 1 in dirty_ino_d,
which makes no sense. Well, it is harmless though.

Also, add few more useful assertions. And improve few debugging
messages.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

fs/ubifs/budget.c

@@ -686,9 +686,10 @@ void ubifs_convert_page_budget(struct ubifs_info *c)
 void ubifs_release_dirty_inode_budget(struct ubifs_info *c,
 				      struct ubifs_inode *ui)
 {
-	struct ubifs_budget_req req = {.dd_growth = c->inode_budget,
-				       .dirtied_ino_d = ui->data_len};
+	struct ubifs_budget_req req;
 
+	memset(&req, 0, sizeof(struct ubifs_budget_req));
+	req.dd_growth = c->inode_budget + ui->data_len;
 	ubifs_release_budget(c, &req);
 }
 

fs/ubifs/dir.c

@@ -727,8 +727,7 @@ static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 	struct ubifs_inode *dir_ui = ubifs_inode(dir);
 	struct ubifs_info *c = dir->i_sb->s_fs_info;
 	int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
-	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
-					.dirtied_ino_d = 1 };
+	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
 
 	/*
 	 * Budget request settings: new inode, new direntry and changing parent