forked from Minki/linux
[MAC80211]: remove HW_KEY_IDX_INVALID
This patch makes the mac80211/driver interface rely only on the IEEE80211_TXCTL_DO_NOT_ENCRYPT flag to signal to the driver whether a frame should be encrypted or not, since mac80211 internally no longer relies on HW_KEY_IDX_INVALID either this removes it, changes the key index to be a u8 in all places and makes the full range of the value available to drivers. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -164,7 +164,6 @@ struct ieee80211_low_level_stats {
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/* Transmit control fields. This data structure is passed to low-level driver
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* with each TX frame. The low-level driver is responsible for configuring
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* the hardware to use given values (depending on what is supported). */
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#define HW_KEY_IDX_INVALID -1
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struct ieee80211_tx_control {
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int tx_rate; /* Transmit rate, given as the hw specific value for the
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@ -197,13 +196,13 @@ struct ieee80211_tx_control {
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* long retry value */
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u32 flags; /* tx control flags defined
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* above */
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u8 key_idx; /* keyidx from hw->set_key(), undefined if
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* IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */
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u8 retry_limit; /* 1 = only first attempt, 2 = one retry, ..
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* This could be used when set_retry_limit
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* is not implemented by the driver */
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u8 power_level; /* per-packet transmit power level, in dBm */
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u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
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s8 key_idx; /* HW_KEY_IDX_INVALID = do not encrypt,
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* other values: keyidx from hw->set_key() */
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u8 icv_len; /* length of the ICV/MIC field in octets */
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u8 iv_len; /* length of the IV field in octets */
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u8 tkip_key[16]; /* generated phase2/phase1 key for hw TKIP */
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@ -467,8 +466,7 @@ enum ieee80211_key_flags {
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*
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* @hw_key_idx: To be set by the driver, this is the key index the driver
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* wants to be given when a frame is transmitted and needs to be
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* encrypted in hardware. It defaults to %HW_KEY_IDX_INVALID which
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* the driver may not use.
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* encrypted in hardware.
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* @alg: The key algorithm.
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* @flags: key flags, see &enum ieee80211_key_flags.
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* @keyidx: the key index (0-3)
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@ -476,8 +474,8 @@ enum ieee80211_key_flags {
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* @key: key material
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*/
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struct ieee80211_key_conf {
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int hw_key_idx;
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ieee80211_key_alg alg;
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u8 hw_key_idx;
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u8 flags;
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s8 keyidx;
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u8 keylen;
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@ -686,9 +684,10 @@ struct ieee80211_ops {
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* selected by the low-level driver.
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*
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* Return 0 if the key is now in use, -EOPNOTSUPP or -ENOSPC if it
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* couldn't be added; if you return 0 then hw_key_idx must be
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* assigned to something other than HW_KEY_IDX_INVALID. When the cmd
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* is DISABLE_KEY then it must succeed.
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* couldn't be added; if you return 0 then hw_key_idx must be assigned
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* to the hardware key index, you are free to use the full u8 range.
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*
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* When the cmd is DISABLE_KEY then it must succeed.
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*
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* Note that it is permissible to not decrypt a frame even if a key
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* for it has been uploaded to hardware, the stack will not make any
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@ -73,8 +73,6 @@ static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
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key->sdata->dev->dev_addr, addr,
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&key->conf);
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WARN_ON(!ret && (key->conf.hw_key_idx == HW_KEY_IDX_INVALID));
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if (!ret)
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key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
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@ -109,7 +107,6 @@ static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
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key->conf.keyidx, MAC_ARG(addr), ret);
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key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
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key->conf.hw_key_idx = HW_KEY_IDX_INVALID;
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}
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struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
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@ -132,7 +129,6 @@ struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
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* Default to software encryption; we'll later upload the
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* key to the hardware if possible.
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*/
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key->conf.hw_key_idx = HW_KEY_IDX_INVALID;
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key->conf.flags = 0;
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key->flags = 0;
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@ -430,8 +430,6 @@ ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
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{
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struct ieee80211_key *key;
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tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
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if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
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tx->key = NULL;
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else if (tx->sta && (key = rcu_dereference(tx->sta->key)))
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@ -442,8 +440,10 @@ ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
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!(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) {
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I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
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return TXRX_DROP;
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} else
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} else {
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tx->key = NULL;
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tx->u.tx.control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT;
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}
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if (tx->key) {
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tx->key->tx_rx_count++;
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@ -724,6 +724,15 @@ ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
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}
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}
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/*
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* Tell hardware to not encrypt when we had sw crypto.
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* Because we use the same flag to internally indicate that
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* no (software) encryption should be done, we have to set it
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* after all crypto handlers.
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*/
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if (tx->key && !(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
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tx->u.tx.control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT;
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return TXRX_CONTINUE;
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}
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@ -833,7 +842,6 @@ __ieee80211_parse_tx_radiotap(
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*/
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control->retry_limit = 1; /* no retry */
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control->key_idx = HW_KEY_IDX_INVALID;
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control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
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IEEE80211_TXCTL_USE_CTS_PROTECT);
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control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT |
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