Commit 2ba4b32e authored by John W. Linville's avatar John W. Linville
Browse files

lib80211: consolidate crypt init routines


Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 274bfb8d
......@@ -2788,46 +2788,6 @@ static void prism2_check_sta_fw_version(local_info_t *local)
}
static void prism2_crypt_deinit_entries(local_info_t *local, int force)
{
struct list_head *ptr, *n;
struct lib80211_crypt_data *entry;
for (ptr = local->crypt_info.crypt_deinit_list.next, n = ptr->next;
ptr != &local->crypt_info.crypt_deinit_list;
ptr = n, n = ptr->next) {
entry = list_entry(ptr, struct lib80211_crypt_data, list);
if (atomic_read(&entry->refcnt) != 0 && !force)
continue;
list_del(ptr);
if (entry->ops)
entry->ops->deinit(entry->priv);
kfree(entry);
}
}
static void prism2_crypt_deinit_handler(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
unsigned long flags;
spin_lock_irqsave(&local->lock, flags);
prism2_crypt_deinit_entries(local, 0);
if (!list_empty(&local->crypt_info.crypt_deinit_list)) {
printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
"deletion list\n", local->dev->name);
local->crypt_info.crypt_deinit_timer.expires = jiffies + HZ;
add_timer(&local->crypt_info.crypt_deinit_timer);
}
spin_unlock_irqrestore(&local->lock, flags);
}
static void hostap_passive_scan(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
......@@ -3252,12 +3212,7 @@ while (0)
INIT_LIST_HEAD(&local->cmd_queue);
init_waitqueue_head(&local->hostscan_wq);
local->crypt_info.name = dev->name;
local->crypt_info.lock = &local->lock;
INIT_LIST_HEAD(&local->crypt_info.crypt_deinit_list);
init_timer(&local->crypt_info.crypt_deinit_timer);
local->crypt_info.crypt_deinit_timer.data = (unsigned long) local;
local->crypt_info.crypt_deinit_timer.function = prism2_crypt_deinit_handler;
lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
init_timer(&local->passive_scan_timer);
local->passive_scan_timer.data = (unsigned long) local;
......@@ -3358,9 +3313,7 @@ static void prism2_free_local_data(struct net_device *dev)
flush_scheduled_work();
if (timer_pending(&local->crypt_info.crypt_deinit_timer))
del_timer(&local->crypt_info.crypt_deinit_timer);
prism2_crypt_deinit_entries(local, 1);
lib80211_crypt_info_free(&local->crypt_info);
if (timer_pending(&local->passive_scan_timer))
del_timer(&local->passive_scan_timer);
......@@ -3377,16 +3330,6 @@ static void prism2_free_local_data(struct net_device *dev)
if (local->dev_enabled)
prism2_callback(local, PRISM2_CALLBACK_DISABLE);
for (i = 0; i < WEP_KEYS; i++) {
struct lib80211_crypt_data *crypt = local->crypt_info.crypt[i];
if (crypt) {
if (crypt->ops)
crypt->ops->deinit(crypt->priv);
kfree(crypt);
local->crypt_info.crypt[i] = NULL;
}
}
if (local->ap != NULL)
hostap_free_data(local->ap);
......
......@@ -116,32 +116,6 @@ static int prism2_get_name(struct net_device *dev,
}
static void prism2_crypt_delayed_deinit(local_info_t *local,
struct lib80211_crypt_data **crypt)
{
struct lib80211_crypt_data *tmp;
unsigned long flags;
tmp = *crypt;
*crypt = NULL;
if (tmp == NULL)
return;
/* must not run ops->deinit() while there may be pending encrypt or
* decrypt operations. Use a list of delayed deinits to avoid needing
* locking. */
spin_lock_irqsave(&local->lock, flags);
list_add(&tmp->list, &local->crypt_info.crypt_deinit_list);
if (!timer_pending(&local->crypt_info.crypt_deinit_timer)) {
local->crypt_info.crypt_deinit_timer.expires = jiffies + HZ;
add_timer(&local->crypt_info.crypt_deinit_timer);
}
spin_unlock_irqrestore(&local->lock, flags);
}
static int prism2_ioctl_siwencode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *keybuf)
......@@ -166,14 +140,14 @@ static int prism2_ioctl_siwencode(struct net_device *dev,
if (erq->flags & IW_ENCODE_DISABLED) {
if (*crypt)
prism2_crypt_delayed_deinit(local, crypt);
lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
goto done;
}
if (*crypt != NULL && (*crypt)->ops != NULL &&
strcmp((*crypt)->ops->name, "WEP") != 0) {
/* changing to use WEP; deinit previously used algorithm */
prism2_crypt_delayed_deinit(local, crypt);
lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
}
if (*crypt == NULL) {
......@@ -189,7 +163,7 @@ static int prism2_ioctl_siwencode(struct net_device *dev,
request_module("lib80211_crypt_wep");
new_crypt->ops = lib80211_get_crypto_ops("WEP");
}
if (new_crypt->ops)
if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
new_crypt->priv = new_crypt->ops->init(i);
if (!new_crypt->ops || !new_crypt->priv) {
kfree(new_crypt);
......@@ -3269,7 +3243,7 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
if ((erq->flags & IW_ENCODE_DISABLED) ||
ext->alg == IW_ENCODE_ALG_NONE) {
if (*crypt)
prism2_crypt_delayed_deinit(local, crypt);
lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
goto done;
}
......@@ -3317,7 +3291,7 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
if (*crypt == NULL || (*crypt)->ops != ops) {
struct lib80211_crypt_data *new_crypt;
prism2_crypt_delayed_deinit(local, crypt);
lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
GFP_KERNEL);
......@@ -3326,7 +3300,8 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
goto done;
}
new_crypt->ops = ops;
new_crypt->priv = new_crypt->ops->init(i);
if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
new_crypt->priv = new_crypt->ops->init(i);
if (new_crypt->priv == NULL) {
kfree(new_crypt);
ret = -EINVAL;
......@@ -3503,7 +3478,7 @@ static int prism2_ioctl_set_encryption(local_info_t *local,
if (strcmp(param->u.crypt.alg, "none") == 0) {
if (crypt)
prism2_crypt_delayed_deinit(local, crypt);
lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
goto done;
}
......@@ -3533,7 +3508,7 @@ static int prism2_ioctl_set_encryption(local_info_t *local,
if (*crypt == NULL || (*crypt)->ops != ops) {
struct lib80211_crypt_data *new_crypt;
prism2_crypt_delayed_deinit(local, crypt);
lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
GFP_KERNEL);
......
......@@ -114,6 +114,9 @@ struct lib80211_crypt_info {
int crypt_quiesced;
};
int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,
spinlock_t *lock);
void lib80211_crypt_info_free(struct lib80211_crypt_info *info);
int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops);
int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops);
struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name);
......
......@@ -182,13 +182,7 @@ struct net_device *alloc_ieee80211(int sizeof_priv)
spin_lock_init(&ieee->lock);
ieee->crypt_info.name = dev->name;
ieee->crypt_info.lock = &ieee->lock;
INIT_LIST_HEAD(&ieee->crypt_info.crypt_deinit_list);
setup_timer(&ieee->crypt_info.crypt_deinit_timer,
lib80211_crypt_deinit_handler,
(unsigned long)&ieee->crypt_info);
ieee->crypt_info.crypt_quiesced = 0;
lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);
ieee->wpa_enabled = 0;
ieee->drop_unencrypted = 0;
......@@ -206,23 +200,7 @@ void free_ieee80211(struct net_device *dev)
{
struct ieee80211_device *ieee = netdev_priv(dev);
int i;
lib80211_crypt_quiescing(&ieee->crypt_info);
del_timer_sync(&ieee->crypt_info.crypt_deinit_timer);
lib80211_crypt_deinit_entries(&ieee->crypt_info, 1);
for (i = 0; i < WEP_KEYS; i++) {
struct lib80211_crypt_data *crypt = ieee->crypt_info.crypt[i];
if (crypt) {
if (crypt->ops) {
crypt->ops->deinit(crypt->priv);
module_put(crypt->ops->owner);
}
kfree(crypt);
ieee->crypt_info.crypt[i] = NULL;
}
}
lib80211_crypt_info_free(&ieee->crypt_info);
ieee80211_networks_free(ieee);
free_netdev(dev);
......
......@@ -71,6 +71,44 @@ const char *print_ssid(char *buf, const char *ssid, u8 ssid_len)
}
EXPORT_SYMBOL(print_ssid);
int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,
spinlock_t *lock)
{
memset(info, 0, sizeof(*info));
info->name = name;
info->lock = lock;
INIT_LIST_HEAD(&info->crypt_deinit_list);
setup_timer(&info->crypt_deinit_timer, lib80211_crypt_deinit_handler,
(unsigned long)info);
return 0;
}
EXPORT_SYMBOL(lib80211_crypt_info_init);
void lib80211_crypt_info_free(struct lib80211_crypt_info *info)
{
int i;
lib80211_crypt_quiescing(info);
del_timer_sync(&info->crypt_deinit_timer);
lib80211_crypt_deinit_entries(info, 1);
for (i = 0; i < NUM_WEP_KEYS; i++) {
struct lib80211_crypt_data *crypt = info->crypt[i];
if (crypt) {
if (crypt->ops) {
crypt->ops->deinit(crypt->priv);
module_put(crypt->ops->owner);
}
kfree(crypt);
info->crypt[i] = NULL;
}
}
}
EXPORT_SYMBOL(lib80211_crypt_info_free);
void lib80211_crypt_deinit_entries(struct lib80211_crypt_info *info, int force)
{
struct lib80211_crypt_data *entry, *next;
......
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