Commit 76708dee authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville

mac80211: free up 2 bytes in skb->cb

Free up 2 bytes in skb->cb to be used for multi-rate retry later.
Move iv_len and icv_len initialization into key alloc.
Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 417bd25a
......@@ -1188,7 +1188,7 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
if (info->control.hw_key) {
keyidx = info->control.hw_key->hw_key_idx;
pktlen += info->control.icv_len;
pktlen += info->control.hw_key->icv_len;
}
ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
......
......@@ -237,7 +237,7 @@ static int ath_tx_prepare(struct ath_softc *sc,
if (tx_info->control.hw_key) {
txctl->keyix = tx_info->control.hw_key->hw_key_idx;
txctl->frmlen += tx_info->control.icv_len;
txctl->frmlen += tx_info->control.hw_key->icv_len;
if (tx_info->control.hw_key->alg == ALG_WEP)
txctl->keytype = ATH9K_KEY_TYPE_WEP;
......
......@@ -252,7 +252,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
}
/* Hardware appends ICV. */
plcp_fragment_len += info->control.icv_len;
plcp_fragment_len += info->control.hw_key->icv_len;
key_idx = b43_kidx_to_fw(dev, key_idx);
mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
......@@ -260,7 +260,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
B43_TXH_MAC_KEYALG;
wlhdr_len = ieee80211_hdrlen(fctl);
iv_len = min((size_t) info->control.iv_len,
iv_len = min((size_t) info->control.hw_key->iv_len,
ARRAY_SIZE(txhdr->iv));
memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
}
......
......@@ -243,7 +243,7 @@ static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
if (key->enabled) {
/* Hardware appends ICV. */
plcp_fragment_len += info->control.icv_len;
plcp_fragment_len += info->control.hw_key->icv_len;
key_idx = b43legacy_kidx_to_fw(dev, key_idx);
mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
......@@ -252,7 +252,7 @@ static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
B43legacy_TX4_MAC_KEYALG_SHIFT) &
B43legacy_TX4_MAC_KEYALG;
wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
iv_len = min((size_t)info->control.iv_len,
iv_len = min((size_t)info->control.hw_key->iv_len,
ARRAY_SIZE(txhdr->iv));
memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
} else {
......
......@@ -56,10 +56,10 @@ unsigned int rt2x00crypto_tx_overhead(struct ieee80211_tx_info *tx_info)
* note that these lengths should only be added when
* mac80211 does not generate it.
*/
overhead += tx_info->control.icv_len;
overhead += key->icv_len;
if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
overhead += tx_info->control.iv_len;
overhead += key->iv_len;
if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
if (key->alg == ALG_TKIP)
......
......@@ -374,7 +374,7 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
struct txentry_desc txdesc;
struct skb_frame_desc *skbdesc;
unsigned int iv_len = IEEE80211_SKB_CB(skb)->control.iv_len;
unsigned int iv_len;
if (unlikely(rt2x00queue_full(queue)))
return -EINVAL;
......@@ -410,8 +410,11 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
* the frame so we can provide it to the driver seperately.
*/
if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
!test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags))
!test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags) &&
(IEEE80211_SKB_CB(skb)->control.hw_key != NULL)) {
iv_len = IEEE80211_SKB_CB(skb)->control.hw_key->iv_len;
rt2x00crypto_tx_remove_iv(skb, iv_len);
}
/*
* It could be possible that the queue was corrupted and this
......
......@@ -337,8 +337,6 @@ struct ieee80211_tx_info {
unsigned long jiffies;
s8 rts_cts_rate_idx, alt_retry_rate_idx;
u8 retry_limit;
u8 icv_len;
u8 iv_len;
} control;
struct {
u64 ampdu_ack_map;
......@@ -635,6 +633,8 @@ enum ieee80211_key_flags {
*/
struct ieee80211_key_conf {
enum ieee80211_key_alg alg;
u8 icv_len;
u8 iv_len;
u8 hw_key_idx;
u8 flags;
s8 keyidx;
......
......@@ -281,6 +281,20 @@ struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
key->conf.alg = alg;
key->conf.keyidx = idx;
key->conf.keylen = key_len;
switch (alg) {
case ALG_WEP:
key->conf.iv_len = WEP_IV_LEN;
key->conf.icv_len = WEP_ICV_LEN;
break;
case ALG_TKIP:
key->conf.iv_len = TKIP_IV_LEN;
key->conf.icv_len = TKIP_ICV_LEN;
break;
case ALG_CCMP:
key->conf.iv_len = CCMP_HDR_LEN;
key->conf.icv_len = CCMP_MIC_LEN;
break;
}
memcpy(key->conf.key, key_data, key_len);
INIT_LIST_HEAD(&key->list);
INIT_LIST_HEAD(&key->todo);
......
......@@ -313,9 +313,6 @@ static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
info->control.iv_len = WEP_IV_LEN;
info->control.icv_len = WEP_ICV_LEN;
if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
return -1;
......
......@@ -152,9 +152,6 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
int len, tail;
u8 *pos;
info->control.icv_len = TKIP_ICV_LEN;
info->control.iv_len = TKIP_IV_LEN;
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
!(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
/* hwaccel - with no need for preallocated room for IV/ICV */
......@@ -374,9 +371,6 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
u8 *pos, *pn;
int i;
info->control.icv_len = CCMP_MIC_LEN;
info->control.iv_len = CCMP_HDR_LEN;
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
!(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
/* hwaccel - with no need for preallocated room for CCMP "
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment