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authorFelix Fietkau <nbd@openwrt.org>2010-11-22 22:58:24 +0300
committerJohn W. Linville <linville@tuxdriver.com>2010-11-25 00:19:35 +0300
commitdd5b4cc71cd09c33e1579cc6d5720656e94e52de (patch)
tree86a27c86480109d9b6bbedddc083095035fbef2d
parent46090979a55a0dc2cdb3d939f94fa47742108194 (diff)
downloadlinux-dd5b4cc71cd09c33e1579cc6d5720656e94e52de.tar.xz
cfg80211/mac80211: improve ad-hoc multicast rate handling
- store the multicast rate as an index instead of the rate value (reduces cpu overhead in a hotpath) - validate the rate values (must match a bitrate in at least one sband) Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--include/net/cfg80211.h4
-rw-r--r--include/net/mac80211.h4
-rw-r--r--net/mac80211/ibss.c3
-rw-r--r--net/mac80211/rate.c25
-rw-r--r--net/wireless/nl80211.c36
5 files changed, 51 insertions, 21 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 91f099556ac1..dd4c43f512e2 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -923,7 +923,7 @@ struct cfg80211_disassoc_request {
* @privacy: this is a protected network, keys will be configured
* after joining
* @basic_rates: bitmap of basic rates to use when creating the IBSS
- * @mcast_rate: multicast tx rate (in 100 kbps)
+ * @mcast_rate: per-band multicast rate index + 1 (0: disabled)
*/
struct cfg80211_ibss_params {
u8 *ssid;
@@ -935,7 +935,7 @@ struct cfg80211_ibss_params {
u32 basic_rates;
bool channel_fixed;
bool privacy;
- int mcast_rate;
+ int mcast_rate[IEEE80211_NUM_BANDS];
};
/**
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 5b0fff2178bb..08e97e5d03fd 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -219,7 +219,7 @@ enum ieee80211_bss_change {
* @basic_rates: bitmap of basic rates, each bit stands for an
* index into the rate table configured by the driver in
* the current band.
- * @mcast_rate: multicast rate for AP and Ad-Hoc (in 100 kbps)
+ * @mcast_rate: per-band multicast rate index + 1 (0: disabled)
* @bssid: The BSSID for this BSS
* @enable_beacon: whether beaconing should be enabled or not
* @channel_type: Channel type for this BSS -- the hardware might be
@@ -259,7 +259,7 @@ struct ieee80211_bss_conf {
u16 assoc_capability;
u64 timestamp;
u32 basic_rates;
- u32 mcast_rate;
+ int mcast_rate[IEEE80211_NUM_BANDS];
u16 ht_operation_mode;
s32 cqm_rssi_thold;
u32 cqm_rssi_hyst;
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 6fe6837dc134..410d104b1347 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -915,7 +915,8 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
sdata->u.ibss.privacy = params->privacy;
sdata->u.ibss.basic_rates = params->basic_rates;
- sdata->vif.bss_conf.mcast_rate = params->mcast_rate;
+ memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate,
+ sizeof(params->mcast_rate));
sdata->vif.bss_conf.beacon_int = params->beacon_interval;
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 76de4f8d9327..3d5a2cb835c4 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -211,20 +211,11 @@ static bool rc_no_data_or_no_ack(struct ieee80211_tx_rate_control *txrc)
return (info->flags & IEEE80211_TX_CTL_NO_ACK) || !ieee80211_is_data(fc);
}
-static void rc_send_low_broadcast(s8 *idx, u32 basic_rates, u32 mcast_rate,
+static void rc_send_low_broadcast(s8 *idx, u32 basic_rates,
struct ieee80211_supported_band *sband)
{
u8 i;
- if (mcast_rate) {
- for (i = 0; i < sband->n_bitrates; i++) {
- if (sband->bitrates[i].bitrate == mcast_rate) {
- *idx = i;
- return;
- }
- }
- }
-
if (basic_rates == 0)
return; /* assume basic rates unknown and accept rate */
if (*idx < 0)
@@ -247,17 +238,25 @@ bool rate_control_send_low(struct ieee80211_sta *sta,
struct ieee80211_tx_rate_control *txrc)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
+ struct ieee80211_supported_band *sband = txrc->sband;
+ int mcast_rate;
if (!sta || !priv_sta || rc_no_data_or_no_ack(txrc)) {
info->control.rates[0].idx = rate_lowest_index(txrc->sband, sta);
info->control.rates[0].count =
(info->flags & IEEE80211_TX_CTL_NO_ACK) ?
1 : txrc->hw->max_rate_tries;
- if (!sta && txrc->bss)
+ if (!sta && txrc->bss) {
+ mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
+ if (mcast_rate > 0) {
+ info->control.rates[0].idx = mcast_rate - 1;
+ return true;
+ }
+
rc_send_low_broadcast(&info->control.rates[0].idx,
txrc->bss_conf->basic_rates,
- txrc->bss_conf->mcast_rate,
- txrc->sband);
+ sband);
+ }
return true;
}
return false;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index b15eb77195d8..8734efa663d1 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3600,6 +3600,34 @@ static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
local_state_change);
}
+static bool
+nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
+ int mcast_rate[IEEE80211_NUM_BANDS],
+ int rateval)
+{
+ struct wiphy *wiphy = &rdev->wiphy;
+ bool found = false;
+ int band, i;
+
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+ struct ieee80211_supported_band *sband;
+
+ sband = wiphy->bands[band];
+ if (!sband)
+ continue;
+
+ for (i = 0; i < sband->n_bitrates; i++) {
+ if (sband->bitrates[i].bitrate == rateval) {
+ mcast_rate[band] = i + 1;
+ found = true;
+ break;
+ }
+ }
+ }
+
+ return found;
+}
+
static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
@@ -3683,9 +3711,11 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
}
}
- if (info->attrs[NL80211_ATTR_MCAST_RATE])
- ibss.mcast_rate =
- nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
+
+ if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
+ !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
+ nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
+ return -EINVAL;
if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
connkeys = nl80211_parse_connkeys(rdev,