mufs: locate directory entry properly in mufs_rmpath()

source/fs/mufs/path.c

@@ -95,9 +95,12 @@ int mufs_rmpath(struct mufs *fs, const char *path)
 	struct flash_dev *dev = fs->dev;
 	char data[1 << dev->log2_block_size];
 	struct mufs_dentry *entry, *next;
+	struct mufs_dirent ent;
 	struct mufs_tree *tree;
+	struct mufs_dir *dir;
 	char *s, *name;
 	uint32_t va, offset, len;
+	int ret;
 
 	if (!(s = mufs_abspath(path)))
 		return -1;
@@ -105,13 +108,24 @@ int mufs_rmpath(struct mufs *fs, const char *path)
 	name = strrchr(s, '/');
 	*name++ = '\0';
 
-	if (!(tree = resolve_path(fs, s, NULL))) {
-		free(s);
-		return -1;
+	if (!(tree = resolve_path(fs, s, NULL)))
+		goto err_free_s;
+
+	if (!(dir = mufs_opendir(fs, s)))
+		goto err_free_s;
+
+	for (va = dir->va; (ret = mufs_readdir(dir, &ent)) == 0; va = dir->va) {
+		if (strcmp(ent.path, name) == 0)
+			break;
 	}
 
-	offset = tree->va & ((UINT32_C(1) << dev->log2_block_size) - 1);
-	va = align(tree->va, dev->log2_block_size);
+	mufs_closedir(dir);
+
+	if (ret < 0)
+		goto err_free_s;
+
+	offset = va & ((UINT32_C(1) << dev->log2_block_size) - 1);
+	va = align(va, dev->log2_block_size);
 
 	if (mufs_tree_read(tree, data, va, 1 << dev->log2_block_size) == 0)
 		return -1;
@@ -130,7 +144,12 @@ int mufs_rmpath(struct mufs *fs, const char *path)
 	if (mufs_tree_write(tree, data, va, 1 << dev->log2_block_size) == 0)
 		return -1;
 
+	free(s);
 	return 0;
+
+err_free_s:
+	free(s);
+	return -1;
 }
 
 int mufs_stat(struct mufs *fs, const char *path, struct mufs_stat *stat)