net/mac80211/key.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include "ieee80211_i.h"
  13 #include "debugfs_key.h"
  14 #include "aes_ccm.h"
  15
  16 struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
  17                                           int idx, size_t key_len, gfp_t flags)
  18 {
  19         struct ieee80211_key *key;
  20
  21         key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags);
  22         if (!key)
  23                 return NULL;
  24         kref_init(&key->kref);
  25         return key;
  26 }
  27
  28 static void ieee80211_key_release(struct kref *kref)
  29 {
  30         struct ieee80211_key *key;
  31
  32         key = container_of(kref, struct ieee80211_key, kref);
  33         if (key->conf.alg == ALG_CCMP)
  34                 ieee80211_aes_key_free(key->u.ccmp.tfm);
  35         ieee80211_debugfs_key_remove(key);
  36         kfree(key);
  37 }
  38
  39 void ieee80211_key_free(struct ieee80211_key *key)
  40 {
  41         if (key)
  42                 kref_put(&key->kref, ieee80211_key_release);
  43 }