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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
/* 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 *var, *next;
if (!bank)
return;
list_for_each_safe(bank, var, next, link) {
list_del(&var->link);
dealloc_secvar(var);
}
}
int copy_bank_list(struct list_head *dst, struct list_head *src)
{
struct secvar *var, *tmp;
list_for_each(src, var, link) {
/* Allocate new secvar using actual data size */
tmp = new_secvar(var->key, var->key_len, var->data,
var->data_size, var->flags);
/* Append to new list */
list_add_tail(dst, &tmp->link);
}
return OPAL_SUCCESS;
}
struct secvar *alloc_secvar(uint64_t key_len, uint64_t data_size)
{
struct secvar *ret;
ret = zalloc(sizeof(struct secvar));
if (!ret)
return NULL;
ret->key = zalloc(key_len);
if (!ret->key) {
free(ret);
return NULL;
}
ret->data = zalloc(data_size);
if (!ret->data) {
free(ret->key);
free(ret);
return NULL;
}
ret->key_len = key_len;
ret->data_size = data_size;
return ret;
}
struct secvar *new_secvar(const char *key, uint64_t key_len,
const char *data, uint64_t data_size,
uint64_t flags)
{
struct secvar *ret;
if (!key)
return NULL;
if ((!key_len) || (key_len > SECVAR_MAX_KEY_LEN))
return NULL;
if ((!data) && (data_size))
return NULL;
ret = alloc_secvar(key_len, data_size);
if (!ret)
return NULL;
memcpy(ret->key, key, key_len);
ret->flags = flags;
if (data)
memcpy(ret->data, data, data_size);
return ret;
}
int realloc_secvar(struct secvar *var, uint64_t size)
{
void *tmp;
if (var->data_size >= size)
return 0;
tmp = zalloc(size);
if (!tmp)
return -1;
memcpy(tmp, var->data, var->data_size);
free(var->data);
var->data = tmp;
return 0;
}
void dealloc_secvar(struct secvar *var)
{
if (!var)
return;
free(var->key);
free(var->data);
free(var);
}
struct secvar *find_secvar(const char *key, uint64_t key_len, struct list_head *bank)
{
struct secvar *var = NULL;
list_for_each(bank, var, link) {
// Prevent matching shorter key subsets / bail early
if (key_len != var->key_len)
continue;
if (!memcmp(key, var->key, key_len))
return var;
}
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 *var;
list_for_each(bank, var, link)
ret++;
return ret;
}
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