diff options
Diffstat (limited to 'ncr.c')
| -rw-r--r-- | ncr.c | 220 |
1 files changed, 2 insertions, 218 deletions
@@ -1,7 +1,7 @@ /* * New driver for /dev/crypto device (aka CryptoDev) - * Copyright (c) 2009,2010 Nikos Mavrogiannopoulos <nmav@gnutls.org> + * Copyright (c) 2010 Nikos Mavrogiannopoulos <nmav@gnutls.org> * * This file is part of linux cryptodev. * @@ -32,8 +32,6 @@ #define err() printk(KERN_DEBUG"ncr: %s: %d\n", __func__, __LINE__) -static void _ncr_data_item_put( struct data_item* item); - void* ncr_init_lists(void) { struct ncr_lists *lst; @@ -55,224 +53,10 @@ void* ncr_init_lists(void) void ncr_deinit_lists(struct ncr_lists *lst) { if(lst) { - struct data_item * item, *tmp; - - down(&lst->data_sem); - - list_for_each_entry_safe(item, tmp, &lst->data_list, list) { - list_del(&item->list); - _ncr_data_item_put( item); /* decrement ref count */ - } - up(&lst->data_sem); + ncr_data_list_deinit(lst); 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_entry(item, &lst->data_list, list) { - mx = max(mx, item->desc); - } - mx++; - - return mx; -} - -/* returns the data item corresponding to desc */ -static struct data_item* ncr_data_item_get( struct ncr_lists* lst, ncr_data_t desc) -{ -struct data_item* item; - - down(&lst->data_sem); - list_for_each_entry(item, &lst->data_list, list) { - if (item->desc == desc) { - atomic_inc(&item->refcnt); - up(&lst->data_sem); - return item; - } - } - up(&lst->data_sem); - - err(); - return NULL; -} - -static void* data_alloc(unsigned int uid, size_t size) -{ - /* FIXME: enforce a maximum memory limit per user */ - if (size > 64*1024) { - err(); - return NULL; - } - return kmalloc(size, GFP_KERNEL); -} - -static void data_free(struct data_item * data) -{ - /* FIXME: enforce a maximum memory limit per user */ - kfree(data->data); -} - -static void _ncr_data_item_put( struct data_item* item) -{ - if (atomic_dec_and_test(&item->refcnt)) { - data_free(item); - kfree(item); - } -} - -static 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(sizeof(*data), GFP_KERNEL); - if (data == NULL) { - err(); - return -ENOMEM; - } - - memset(data, 0, sizeof(*data)); - - data->flags = init.flags; - atomic_set(&data->refcnt, 1); - - data->data = data_alloc(uid, init.max_object_size); - if (data->data == NULL) { - kfree(data); - err(); - return -ENOMEM; - } - data->max_data_size = init.max_object_size; - - down(&lst->data_sem); - - data->desc = _ncr_data_get_new_desc(lst); - data->uid = uid; - - if (init.initial_data != NULL) { - copy_from_user(data->data, init.initial_data, init.initial_data_size); - data->data_size = init.initial_data_size; - } - - list_add(&data->list, &lst->data_list); - - up(&lst->data_sem); - - init.desc = data->desc; - copy_to_user(arg, &init, sizeof(init)); - - return 0; -} - - -static int ncr_data_deinit(struct ncr_lists* lst, void __user* arg) -{ - ncr_data_t desc; - struct data_item * item, *tmp; - - copy_from_user( &desc, arg, sizeof(desc)); - - down(&lst->data_sem); - - list_for_each_entry_safe(item, tmp, &lst->data_list, list) { - if(item->desc == desc) { - list_del(&item->list); - _ncr_data_item_put( item); /* decrement ref count */ - break; - } - } - - up(&lst->data_sem); - - return 0; -} - -static int ncr_data_get(struct ncr_lists* lst, void __user* arg) -{ - struct ncr_data_st get; - struct data_item * data; - size_t len; - - copy_from_user( &get, arg, sizeof(get)); - - data = ncr_data_item_get( lst, get.desc); - - if (data == NULL) { - err(); - return -EINVAL; - } - - if (!(data->flags & NCR_DATA_FLAG_EXPORTABLE)) { - err(); - return -EPERM; - } - - len = min(get.data_size, data->data_size); - - /* update length */ - get.data_size = len; - copy_to_user(arg, &get, sizeof(get)); - - if (len > 0) - copy_to_user(get.data, data->data, len); - - _ncr_data_item_put( data); - - return 0; -} - -static int ncr_data_set(struct ncr_lists* lst, void __user* arg) -{ - struct ncr_data_st get; - struct data_item * data; - int ret; - - copy_from_user( &get, arg, sizeof(get)); - - data = ncr_data_item_get( lst, get.desc); - - if (data == NULL) { - err(); - return -EINVAL; - } - - if ((get.data_size > data->max_data_size) || - (get.data == NULL && get.data_size != 0)) { - err(); - ret = -EINVAL; - goto cleanup; - } - - if (!get.append_flag) { - if (get.data != NULL) - copy_from_user(data->data, get.data, get.data_size); - data->data_size = get.data_size; - } else { - if (get.data_size+data->data_size > data->max_data_size) { - err(); - ret = -EINVAL; - goto cleanup; - } - if (get.data != NULL) - copy_from_user(&data->data[data->data_size], get.data, get.data_size); - data->data_size += get.data_size; - } - ret = 0; - -cleanup: - _ncr_data_item_put( data); - - return ret; } int |