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cfg80211/mac80211: improve ad-hoc multicast rate handling

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- 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>
This commit is contained in:
Felix Fietkau
2010-11-22 20:58:24 +01:00
committed by John W. Linville
parent 46090979a5
commit dd5b4cc71c
5 changed files with 51 additions and 21 deletions
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36
net/wireless/nl80211.c
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@@ -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,