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linux-sg2042
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mac80211: partially fix skb->cb use 

This patch fixes mac80211 to not use the skb->cb over the queue step
from virtual interfaces to the master. The patch also, for now,
disables aggregation because that would still require requeuing,
will fix that in a separate patch. There are two other places (software
requeue and powersaving stations) where requeue can happen, but that is
not currently used by any drivers/not possible to use respectively.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-07-29 11:32:07 +02:00 committed by John W. Linville
parent 0ccd58fc03
commit d0f0980414
13 changed files with 40 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/ath5k/base.c
View File

@ -1237,7 +1237,7 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
pktlen = skb->len;
if (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT)) {
if (info->control.hw_key) {
keyidx = info->control.hw_key->hw_key_idx;
pktlen += info->control.icv_len;
}

2
drivers/net/wireless/b43/xmit.c
View File

@ -192,7 +192,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
const struct b43_phy *phy = &dev->phy;
const struct ieee80211_hdr *wlhdr =
(const struct ieee80211_hdr *)fragment_data;
int use_encryption = (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT));
int use_encryption = !!info->control.hw_key;
__le16 fctl = wlhdr->frame_control;
struct ieee80211_rate *fbrate;
u8 rate, rate_fb;

2
drivers/net/wireless/b43legacy/xmit.c
View File

@ -192,7 +192,7 @@ static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
u16 cookie)
{
const struct ieee80211_hdr *wlhdr;
int use_encryption = (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT));
int use_encryption = !!info->control.hw_key;
u16 fctl;
u8 rate;
struct ieee80211_rate *rate_fb;

2
drivers/net/wireless/iwlwifi/iwl-tx.c
View File

@ -906,7 +906,7 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
* first entry */
iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
if (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT))
if (info->control.hw_key)
iwl_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
/* Set up TFD's 2nd entry to point directly to remainder of skb,

2
drivers/net/wireless/iwlwifi/iwl3945-base.c
View File

@ -2667,7 +2667,7 @@ static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
* first entry */
iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
if (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT))
if (info->control.hw_key)
iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
/* Set up TFD's 2nd entry to point directly to remainder of skb,

2
drivers/net/wireless/rt2x00/rt2x00mac.c
View File

@ -63,7 +63,7 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
*/
memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb));
rts_info = IEEE80211_SKB_CB(skb);
rts_info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
rts_info->control.hw_key = NULL;
rts_info->flags &= ~IEEE80211_TX_CTL_USE_RTS_CTS;
rts_info->flags &= ~IEEE80211_TX_CTL_USE_CTS_PROTECT;
rts_info->flags &= ~IEEE80211_TX_CTL_REQ_TX_STATUS;

5
include/linux/skbuff.h
View File

@ -316,7 +316,10 @@ struct sk_buff {
#ifdef CONFIG_IPV6_NDISC_NODETYPE
__u8 ndisc_nodetype:2;
#endif
/* 14 bit hole */
#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
__u8 do_not_encrypt:1;
#endif
/* 0/13/14 bit hole */
#ifdef CONFIG_NET_DMA
dma_cookie_t dma_cookie;

6
include/net/mac80211.h
View File

@ -206,8 +206,6 @@ struct ieee80211_bss_conf {
* These flags are used with the @flags member of &ieee80211_tx_info.
*
* @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame.
* @IEEE80211_TX_CTL_DO_NOT_ENCRYPT: send this frame without encryption;
* e.g., for EAPOL frame
* @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame
* @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g.,
* for combined 802.11g / 802.11b networks)
@ -220,7 +218,6 @@ struct ieee80211_bss_conf {
* @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD
* @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the
* through set_retry_limit configured long retry value
* @IEEE80211_TX_CTL_EAPOL_FRAME: internal to mac80211
* @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
* @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
* @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number
@ -253,7 +250,6 @@ struct ieee80211_bss_conf {
*/
enum mac80211_tx_control_flags {
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
IEEE80211_TX_CTL_DO_NOT_ENCRYPT = BIT(1),
IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2),
IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3),
IEEE80211_TX_CTL_NO_ACK = BIT(4),
@ -263,7 +259,6 @@ enum mac80211_tx_control_flags {
IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8),
IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9),
IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10),
IEEE80211_TX_CTL_EAPOL_FRAME = BIT(11),
IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12),
IEEE80211_TX_CTL_AMPDU = BIT(13),
IEEE80211_TX_CTL_OFDM_HT = BIT(14),
@ -323,7 +318,6 @@ struct ieee80211_tx_info {
struct ieee80211_vif *vif;
struct ieee80211_key_conf *hw_key;
unsigned long jiffies;
int ifindex;
u16 aid;
s8 rts_cts_rate_idx, alt_retry_rate_idx;
u8 retry_limit;

3
net/core/skbuff.c
View File

@ -485,6 +485,9 @@ static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff *skb)
C(head);
C(data);
C(truesize);
#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
C(do_not_encrypt);
#endif
atomic_set(&n->users, 1);
atomic_inc(&(skb_shinfo(skb)->dataref));

8
net/mac80211/main.c
View File

@ -1233,18 +1233,12 @@ static void ieee80211_tasklet_handler(unsigned long data)
/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
* make a prepared TX frame (one that has been given to hw) to look like brand
* new IEEE 802.11 frame that is ready to go through TX processing again.
* Also, tx_packet_data in cb is restored from tx_control. */
*/
static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
struct ieee80211_key *key,
struct sk_buff *skb)
{
int hdrlen, iv_len, mic_len;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS |
IEEE80211_TX_CTL_DO_NOT_ENCRYPT |
IEEE80211_TX_CTL_REQUEUE |
IEEE80211_TX_CTL_EAPOL_FRAME;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);

8
net/mac80211/mlme.c
View File

@ -606,7 +606,6 @@ void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
int encrypt)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_tx_info *info;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
skb->dev = sdata->local->mdev;
@ -614,11 +613,8 @@ void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
skb_set_network_header(skb, 0);
skb_set_transport_header(skb, 0);
info = IEEE80211_SKB_CB(skb);
memset(info, 0, sizeof(struct ieee80211_tx_info));
info->control.ifindex = sdata->dev->ifindex;
if (!encrypt)
info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
skb->iif = sdata->dev->ifindex;
skb->do_not_encrypt = !encrypt;
dev_queue_xmit(skb);
}

47
net/mac80211/tx.c
View File

@ -439,14 +439,14 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
u16 fc = tx->fc;
if (unlikely(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT))
if (unlikely(tx->skb->do_not_encrypt))
tx->key = NULL;
else if (tx->sta && (key = rcu_dereference(tx->sta->key)))
tx->key = key;
else if ((key = rcu_dereference(tx->sdata->default_key)))
tx->key = key;
else if (tx->sdata->drop_unencrypted &&
!(info->flags & IEEE80211_TX_CTL_EAPOL_FRAME) &&
(tx->skb->protocol != cpu_to_be16(ETH_P_PAE)) &&
!(info->flags & IEEE80211_TX_CTL_INJECTED)) {
I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
return TX_DROP;
@ -476,7 +476,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
}
if (!tx->key || !(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
tx->skb->do_not_encrypt = 1;
return TX_CONTINUE;
}
@ -732,6 +732,7 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
memcpy(skb_put(frag, copylen), pos, copylen);
memcpy(frag->cb, first->cb, sizeof(frag->cb));
skb_copy_queue_mapping(frag, first);
frag->do_not_encrypt = first->do_not_encrypt;
pos += copylen;
left -= copylen;
@ -852,7 +853,7 @@ __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx,
sband = tx->local->hw.wiphy->bands[tx->channel->band];
info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
skb->do_not_encrypt = 1;
info->flags |= IEEE80211_TX_CTL_INJECTED;
tx->flags &= ~IEEE80211_TX_FRAGMENTED;
@ -925,8 +926,7 @@ __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx,
skb_trim(skb, skb->len - FCS_LEN);
}
if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
info->flags &=
~IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
tx->skb->do_not_encrypt = 0;
if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
tx->flags |= IEEE80211_TX_FRAGMENTED;
break;
@ -1042,10 +1042,9 @@ static int ieee80211_tx_prepare(struct ieee80211_tx_data *tx,
struct sk_buff *skb,
struct net_device *mdev)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct net_device *dev;
dev = dev_get_by_index(&init_net, info->control.ifindex);
dev = dev_get_by_index(&init_net, skb->iif);
if (unlikely(dev && !is_ieee80211_device(dev, mdev))) {
dev_put(dev);
dev = NULL;
@ -1306,8 +1305,8 @@ int ieee80211_master_start_xmit(struct sk_buff *skb,
bool may_encrypt;
int ret;
if (info->control.ifindex)
odev = dev_get_by_index(&init_net, info->control.ifindex);
if (skb->iif)
odev = dev_get_by_index(&init_net, skb->iif);
if (unlikely(odev && !is_ieee80211_device(odev, dev))) {
dev_put(odev);
odev = NULL;
@ -1321,9 +1320,13 @@ int ieee80211_master_start_xmit(struct sk_buff *skb,
return 0;
}
memset(info, 0, sizeof(*info));
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
osdata = IEEE80211_DEV_TO_SUB_IF(odev);
may_encrypt = !(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT);
may_encrypt = !skb->do_not_encrypt;
headroom = osdata->local->tx_headroom;
if (may_encrypt)
@ -1348,7 +1351,6 @@ int ieee80211_monitor_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_radiotap_header *prthdr =
(struct ieee80211_radiotap_header *)skb->data;
u16 len_rthdr;
@ -1371,11 +1373,11 @@ int ieee80211_monitor_start_xmit(struct sk_buff *skb,
skb->dev = local->mdev;
/* needed because we set skb device to master */
info->control.ifindex = dev->ifindex;
skb->iif = dev->ifindex;
info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
/* Interfaces should always request a status report */
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
/* sometimes we do encrypt injected frames, will be fixed
* up in radiotap parser if not wanted */
skb->do_not_encrypt = 0;
/*
* fix up the pointers accounting for the radiotap
@ -1419,7 +1421,6 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_tx_info *info;
struct ieee80211_sub_if_data *sdata;
int ret = 1, head_need;
u16 ethertype, hdrlen, meshhdrlen = 0;
@ -1645,14 +1646,7 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb,
nh_pos += hdrlen;
h_pos += hdrlen;
info = IEEE80211_SKB_CB(skb);
memset(info, 0, sizeof(*info));
info->control.ifindex = dev->ifindex;
if (ethertype == ETH_P_PAE)
info->flags |= IEEE80211_TX_CTL_EAPOL_FRAME;
/* Interfaces should always request a status report */
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
skb->iif = dev->ifindex;
skb->dev = local->mdev;
dev->stats.tx_packets++;
@ -1922,6 +1916,8 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
info = IEEE80211_SKB_CB(skb);
skb->do_not_encrypt = 1;
info->band = band;
rate_control_get_rate(local->mdev, sband, skb, &rsel);
@ -1940,7 +1936,6 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
info->tx_rate_idx = rsel.rate_idx;
info->flags |= IEEE80211_TX_CTL_NO_ACK;
info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
if (sdata->bss_conf.use_short_preamble &&

3
net/mac80211/wme.c
View File

@ -188,6 +188,9 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
{
int i;
/* XXX: currently broken due to cb/requeue use */
return -EPERM;
/* prepare the filter and save it for the SW queue
* matching the received HW queue */