1 files changed, 102 insertions, 0 deletions
diff --git a/libstb/secvar/secvar_util.c b/libstb/secvar/secvar_util.c
new file mode 100644
index 0000000..a143d0b
--- /dev/null
+++ b/libstb/secvar/secvar_util.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: Apache-2.0
+/* Copyright 2019 IBM Corp. */
+
+#ifndef pr_fmt
+#define pr_fmt(fmt) "SECVAR: " fmt
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <skiboot.h>
+#include <opal.h>
+#include "secvar.h"
+
+void clear_bank_list(struct list_head *bank)
+{
+	struct secvar_node *node, *next;
+
+	if (!bank)
+		return;
+
+	list_for_each_safe(bank, node, next, link) {
+		list_del(&node->link);
+
+		if (node->var)
+			free(node->var);
+		free(node);
+	}
+}
+
+struct secvar_node *alloc_secvar(uint64_t size)
+{
+	struct secvar_node *ret;
+
+	ret = zalloc(sizeof(struct secvar_node));
+	if (!ret)
+		return NULL;
+
+	ret->var = zalloc(sizeof(struct secvar) + size);
+	if (!ret->var) {
+		free(ret);
+		return NULL;
+	}
+
+	ret->size = size;
+
+	return ret;
+}
+
+int realloc_secvar(struct secvar_node *node, uint64_t size)
+{
+	void *tmp;
+
+	if (node->size >= size)
+		return 0;
+
+	tmp = zalloc(sizeof(struct secvar) + size);
+	if (!tmp)
+		return -1;
+
+	memcpy(tmp, node->var, sizeof(struct secvar) + node->size);
+	free(node->var);
+	node->var = tmp;
+
+	return 0;
+}
+
+struct secvar_node *find_secvar(const char *key, uint64_t key_len, struct list_head *bank)
+{
+	struct secvar_node *node = NULL;
+
+	list_for_each(bank, node, link) {
+		// Prevent matching shorter key subsets / bail early
+		if (key_len != node->var->key_len)
+			continue;
+		if (!memcmp(key, node->var->key, key_len))
+			return node;
+	}
+
+	return NULL;
+}
+
+int is_key_empty(const char *key, uint64_t key_len)
+{
+	int i;
+	for (i = 0; i < key_len; i++) {
+		if (key[i] != 0)
+			return 0;
+	}
+
+	return 1;
+}
+
+int list_length(struct list_head *bank)
+{
+	int ret = 0;
+	struct secvar_node *node;
+
+	list_for_each(bank, node, link)
+		ret++;
+
+	return ret;
+}