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ieee80211: cleanup crypto list handling, other minor cleanups.

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This commit is contained in:
Christoph Hellwig 2005-11-09 01:01:04 -05:00 committed by Jeff Garzik
parent c2a8fad433
commit e3305626e0
2 changed files with 40 additions and 109 deletions
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1
include/net/ieee80211_crypt.h
View File

@ -31,6 +31,7 @@ enum {
struct ieee80211_crypto_ops {
const char *name;
struct list_head list;
/* init new crypto context (e.g., allocate private data space,
* select IV, etc.); returns NULL on failure or pointer to allocated

148
net/ieee80211/ieee80211_crypt.c
View File

@ -11,15 +11,14 @@
*
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/string.h>
#include <asm/errno.h>
#include <linux/string.h>
#include <net/ieee80211.h>
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("HostAP crypto");
MODULE_LICENSE("GPL");
@ -29,32 +28,20 @@ struct ieee80211_crypto_alg {
struct ieee80211_crypto_ops *ops;
};
struct ieee80211_crypto {
struct list_head algs;
spinlock_t lock;
};
static struct ieee80211_crypto *hcrypt;
static LIST_HEAD(ieee80211_crypto_algs);
static DEFINE_SPINLOCK(ieee80211_crypto_lock);
void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force)
{
struct list_head *ptr, *n;
struct ieee80211_crypt_data *entry;
struct ieee80211_crypt_data *entry, *next;
unsigned long flags;
spin_lock_irqsave(&ieee->lock, flags);
if (list_empty(&ieee->crypt_deinit_list))
goto unlock;
for (ptr = ieee->crypt_deinit_list.next, n = ptr->next;
ptr != &ieee->crypt_deinit_list; ptr = n, n = ptr->next) {
entry = list_entry(ptr, struct ieee80211_crypt_data, list);
list_for_each_entry_safe(entry, next, &ieee->crypt_deinit_list, list) {
if (atomic_read(&entry->refcnt) != 0 && !force)
continue;
list_del(ptr);
list_del(&entry->list);
if (entry->ops) {
entry->ops->deinit(entry->priv);
@ -62,7 +49,6 @@ void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force)
}
kfree(entry);
}
unlock:
spin_unlock_irqrestore(&ieee->lock, flags);
}
@ -125,9 +111,6 @@ int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops)
unsigned long flags;
struct ieee80211_crypto_alg *alg;
if (hcrypt == NULL)
return -1;
alg = kmalloc(sizeof(*alg), GFP_KERNEL);
if (alg == NULL)
return -ENOMEM;
@ -135,9 +118,9 @@ int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops)
memset(alg, 0, sizeof(*alg));
alg->ops = ops;
spin_lock_irqsave(&hcrypt->lock, flags);
list_add(&alg->list, &hcrypt->algs);
spin_unlock_irqrestore(&hcrypt->lock, flags);
spin_lock_irqsave(&ieee80211_crypto_lock, flags);
list_add(&alg->list, &ieee80211_crypto_algs);
spin_unlock_irqrestore(&ieee80211_crypto_lock, flags);
printk(KERN_DEBUG "ieee80211_crypt: registered algorithm '%s'\n",
ops->name);
@ -147,64 +130,49 @@ int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops)
int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops)
{
struct ieee80211_crypto_alg *alg;
unsigned long flags;
struct list_head *ptr;
struct ieee80211_crypto_alg *del_alg = NULL;
if (hcrypt == NULL)
return -1;
spin_lock_irqsave(&hcrypt->lock, flags);
for (ptr = hcrypt->algs.next; ptr != &hcrypt->algs; ptr = ptr->next) {
struct ieee80211_crypto_alg *alg =
(struct ieee80211_crypto_alg *)ptr;
if (alg->ops == ops) {
list_del(&alg->list);
del_alg = alg;
break;
}
spin_lock_irqsave(&ieee80211_crypto_lock, flags);
list_for_each_entry(alg, &ieee80211_crypto_algs, list) {
if (alg->ops == ops)
goto found;
}
spin_unlock_irqrestore(&hcrypt->lock, flags);
spin_unlock_irqrestore(&ieee80211_crypto_lock, flags);
return -EINVAL;
if (del_alg) {
printk(KERN_DEBUG "ieee80211_crypt: unregistered algorithm "
"'%s'\n", ops->name);
kfree(del_alg);
}
return del_alg ? 0 : -1;
found:
printk(KERN_DEBUG "ieee80211_crypt: unregistered algorithm "
"'%s'\n", ops->name);
list_del(&alg->list);
spin_unlock_irqrestore(&ieee80211_crypto_lock, flags);
kfree(alg);
return 0;
}
struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name)
{
struct ieee80211_crypto_alg *alg;
unsigned long flags;
struct list_head *ptr;
struct ieee80211_crypto_alg *found_alg = NULL;
if (hcrypt == NULL)
return NULL;
spin_lock_irqsave(&hcrypt->lock, flags);
for (ptr = hcrypt->algs.next; ptr != &hcrypt->algs; ptr = ptr->next) {
struct ieee80211_crypto_alg *alg =
(struct ieee80211_crypto_alg *)ptr;
if (strcmp(alg->ops->name, name) == 0) {
found_alg = alg;
break;
}
spin_lock_irqsave(&ieee80211_crypto_lock, flags);
list_for_each_entry(alg, &ieee80211_crypto_algs, list) {
if (strcmp(alg->ops->name, name) == 0)
goto found;
}
spin_unlock_irqrestore(&hcrypt->lock, flags);
spin_unlock_irqrestore(&ieee80211_crypto_lock, flags);
return NULL;
if (found_alg)
return found_alg->ops;
else
return NULL;
found:
spin_unlock_irqrestore(&ieee80211_crypto_lock, flags);
return alg->ops;
}
static void *ieee80211_crypt_null_init(int keyidx)
{
return (void *)1;
}
static void ieee80211_crypt_null_deinit(void *priv)
{
}
@ -213,56 +181,18 @@ static struct ieee80211_crypto_ops ieee80211_crypt_null = {
.name = "NULL",
.init = ieee80211_crypt_null_init,
.deinit = ieee80211_crypt_null_deinit,
.encrypt_mpdu = NULL,
.decrypt_mpdu = NULL,
.encrypt_msdu = NULL,
.decrypt_msdu = NULL,
.set_key = NULL,
.get_key = NULL,
.extra_mpdu_prefix_len = 0,
.extra_mpdu_postfix_len = 0,
.owner = THIS_MODULE,
};
static int __init ieee80211_crypto_init(void)
{
int ret = -ENOMEM;
hcrypt = kmalloc(sizeof(*hcrypt), GFP_KERNEL);
if (!hcrypt)
goto out;
memset(hcrypt, 0, sizeof(*hcrypt));
INIT_LIST_HEAD(&hcrypt->algs);
spin_lock_init(&hcrypt->lock);
ret = ieee80211_register_crypto_ops(&ieee80211_crypt_null);
if (ret < 0) {
kfree(hcrypt);
hcrypt = NULL;
}
out:
return ret;
return ieee80211_register_crypto_ops(&ieee80211_crypt_null);
}
static void __exit ieee80211_crypto_deinit(void)
{
struct list_head *ptr, *n;
if (hcrypt == NULL)
return;
for (ptr = hcrypt->algs.next, n = ptr->next; ptr != &hcrypt->algs;
ptr = n, n = ptr->next) {
struct ieee80211_crypto_alg *alg =
(struct ieee80211_crypto_alg *)ptr;
list_del(ptr);
printk(KERN_DEBUG "ieee80211_crypt: unregistered algorithm "
"'%s' (deinit)\n", alg->ops->name);
kfree(alg);
}
kfree(hcrypt);
ieee80211_unregister_crypto_ops(&ieee80211_crypt_null);
BUG_ON(!list_empty(&ieee80211_crypto_algs));
}
EXPORT_SYMBOL(ieee80211_crypt_deinit_entries);