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40b275b69e
This adds sparse RCU annotations to most of mac80211, only the mesh code remains to be done. Due the the previous patches, the annotations are pretty simple. The only thing that this actually changes is removing the RCU usage of key->sta in debugfs since this pointer isn't actually an RCU-managed pointer (it only has a single assignment done before the key even goes live). As that is otherwise harmless, I decided to make it part of this patch. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
/*
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* Copyright 2002-2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef IEEE80211_KEY_H
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#define IEEE80211_KEY_H
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/crypto.h>
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#include <linux/rcupdate.h>
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#include <net/mac80211.h>
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#define NUM_DEFAULT_KEYS 4
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#define NUM_DEFAULT_MGMT_KEYS 2
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#define WEP_IV_LEN 4
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#define WEP_ICV_LEN 4
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#define ALG_CCMP_KEY_LEN 16
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#define CCMP_HDR_LEN 8
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#define CCMP_MIC_LEN 8
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#define CCMP_TK_LEN 16
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#define CCMP_PN_LEN 6
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#define TKIP_IV_LEN 8
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#define TKIP_ICV_LEN 4
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#define NUM_RX_DATA_QUEUES 17
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struct ieee80211_local;
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struct ieee80211_sub_if_data;
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struct sta_info;
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/**
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* enum ieee80211_internal_key_flags - internal key flags
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*
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* @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
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* in the hardware for TX crypto hardware acceleration.
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*/
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enum ieee80211_internal_key_flags {
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KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
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};
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enum ieee80211_internal_tkip_state {
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TKIP_STATE_NOT_INIT,
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TKIP_STATE_PHASE1_DONE,
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TKIP_STATE_PHASE1_HW_UPLOADED,
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};
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struct tkip_ctx {
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u32 iv32;
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u16 iv16;
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u16 p1k[5];
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enum ieee80211_internal_tkip_state state;
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};
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struct ieee80211_key {
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struct ieee80211_local *local;
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struct ieee80211_sub_if_data *sdata;
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struct sta_info *sta;
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/* for sdata list */
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struct list_head list;
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/* protected by key mutex */
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unsigned int flags;
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union {
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struct {
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/* last used TSC */
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struct tkip_ctx tx;
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/* last received RSC */
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struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
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} tkip;
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struct {
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u8 tx_pn[6];
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/*
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* Last received packet number. The first
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* NUM_RX_DATA_QUEUES counters are used with Data
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* frames and the last counter is used with Robust
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* Management frames.
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*/
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u8 rx_pn[NUM_RX_DATA_QUEUES + 1][6];
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struct crypto_cipher *tfm;
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u32 replays; /* dot11RSNAStatsCCMPReplays */
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/* scratch buffers for virt_to_page() (crypto API) */
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#ifndef AES_BLOCK_LEN
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#define AES_BLOCK_LEN 16
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#endif
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u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
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u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
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} ccmp;
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struct {
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u8 tx_pn[6];
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u8 rx_pn[6];
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struct crypto_cipher *tfm;
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u32 replays; /* dot11RSNAStatsCMACReplays */
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u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
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/* scratch buffers for virt_to_page() (crypto API) */
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u8 tx_crypto_buf[2 * AES_BLOCK_LEN];
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u8 rx_crypto_buf[2 * AES_BLOCK_LEN];
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} aes_cmac;
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} u;
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/* number of times this key has been used */
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int tx_rx_count;
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#ifdef CONFIG_MAC80211_DEBUGFS
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struct {
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struct dentry *stalink;
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struct dentry *dir;
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int cnt;
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} debugfs;
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#endif
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/*
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* key config, must be last because it contains key
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* material as variable length member
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*/
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struct ieee80211_key_conf conf;
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};
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struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
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const u8 *key_data,
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size_t seq_len, const u8 *seq);
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/*
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* Insert a key into data structures (sdata, sta if necessary)
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* to make it used, free old key.
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*/
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int __must_check ieee80211_key_link(struct ieee80211_key *key,
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struct ieee80211_sub_if_data *sdata,
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struct sta_info *sta);
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void __ieee80211_key_free(struct ieee80211_key *key);
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void ieee80211_key_free(struct ieee80211_local *local,
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struct ieee80211_key *key);
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void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
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bool uni, bool multi);
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void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
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int idx);
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void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
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void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
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void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
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#define key_mtx_dereference(local, ref) \
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rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
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#endif /* IEEE80211_KEY_H */
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