On Mon, Sep 05, 2005 at 12:48:45PM -0400, Jeff Garzik wrote:
> >>I understand removing the NULL pointers, but .name is actually a string
> >>"NULL".. Leaving it to be NULL is not a very good idea. This "NULL"
> >>algorithm was designed for cases where there is default algorithm for
> >>encryption and encryption needs to be disabled for a specific station.
> >>In other words, userspace programs will be asking for an algorithm
> >>called "NULL".
> >
> >
> >Yeah, I missed that. Jeff, can you fix that before applying or should
> >I resend?
>
> Please resend updated patch.
Index: linux-2.6/net/ieee80211/ieee80211_crypt.c
===================================================================
--- linux-2.6.orig/net/ieee80211/ieee80211_crypt.c 2005-09-05
14:38:19.000000000 +0200
+++ linux-2.6/net/ieee80211/ieee80211_crypt.c 2005-09-06 14:14:01.000000000
+0200
@@ -11,16 +11,14 @@
*
*/
-#include <linux/config.h>
-#include <linux/version.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 <linux/errno.h>
#include <net/ieee80211.h>
+
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("HostAP crypto");
MODULE_LICENSE("GPL");
@@ -30,28 +28,19 @@
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;
-
- 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);
+ struct ieee80211_crypt_data *entry, *next;
+ 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);
@@ -108,9 +97,6 @@
unsigned long flags;
struct ieee80211_crypto_alg *alg;
- if (hcrypt == NULL)
- return -1;
-
alg = kmalloc(sizeof(*alg), GFP_KERNEL);
if (alg == NULL)
return -ENOMEM;
@@ -118,9 +104,9 @@
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);
@@ -130,121 +116,71 @@
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_unlock_irqrestore(&hcrypt->lock, flags);
-
- if (del_alg) {
- printk(KERN_DEBUG "ieee80211_crypt: unregistered algorithm "
- "'%s'\n", ops->name);
- kfree(del_alg);
- }
-
- return del_alg ? 0 : -1;
+ 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(&ieee80211_crypto_lock, flags);
+ return -EINVAL;
+
+ 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) {}
+static void *ieee80211_crypt_null_init(int keyidx)
+{
+ return (void *) 1;
+}
+
+static void ieee80211_crypt_null_deinit(void *priv)
+{
+}
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_prefix_len = 0,
- .extra_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);
-
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