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/*
* New driver for /dev/crypto device (aka CryptoDev)
* Copyright (c) 2009,2010 Nikos Mavrogiannopoulos <nmav@gnutls.org>
*
* This file is part of linux cryptodev.
*
* cryptodev is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* cryptodev is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/crypto.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/random.h>
#include "cryptodev.h"
#include <asm/uaccess.h>
#include <asm/ioctl.h>
#include <linux/scatterlist.h>
#include "ncr.h"
#include "ncr_int.h"
void* ncr_init_lists(void)
{
struct ncr_lists *lst;
lst = kmalloc(sizeof(*lst), GFP_KERNEL);
if(!lst)
return NULL;
memset(lst, 0, sizeof(*lst));
init_MUTEX(&lst->data_sem);
INIT_LIST_HEAD(&lst->data_list);
return lst;
}
void ncr_deinit_lists(struct ncr_lists *lst)
{
if(lst) {
//data_clear_all(list->data);
kfree(lst);
}
}
/* must be called with data semaphore down
*/
static ncr_data_t _ncr_data_get_new_desc( struct ncr_lists* lst)
{
struct data_item* item;
int mx = 0;
list_for_each(item, &lst->data_list) {
mx = max(mx, item->desc);
}
mx++;
return mx;
}
void* data_alloc(unsigned int uid, size_t size)
{
/* FIXME: implement a maximum memory limit per user */
if (size > 64*1024) {
return NULL;
}
return kmalloc(GPF_KERNEL, size);
}
int ncr_data_new(unsigned int uid, struct ncr_lists* lst, void __user* arg)
{
struct ncr_data_init_st init;
struct data_item* data;
copy_from_user( &init, arg, sizeof(init));
data = kmalloc(GPF_KERNEL, sizeof(*data));
if (data == NULL) {
return -ENOMEM;
}
memset(data, 0, sizeof(*data));
init_MUTEX(&data->sem);
data->flags = init.flags;
data->data = data_alloc(uid, init.max_data_size);
if (data->data == NULL) {
kfree(data);
return -ENOMEM;
}
data->max_data_size = init.max_data_size;
down(lst->data_sem);
data->desc = _ncr_data_get_new_desc(lst);
list_add(data, &list->data_list);
up(lst->data_sem);
init.desc = data->desc;
}
int
ncr_ioctl(unsigned int uid, struct ncr_lists* lst,
unsigned int cmd, unsigned long arg)
{
if (unlikely(!lst))
BUG();
switch (cmd) {
case NCRIO_DATA_INIT:
return ncr_data_new(uid, lst, arg);
case NCRIO_DATA_GET:
case NCRIO_DATA_SET:
case NCRIO_DATA_DEINIT:
default:
return -EINVAL;
}
}
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