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authorJohannes Berg <johannes.berg@intel.com>2016-03-31 19:02:10 +0200
committerJohannes Berg <johannes.berg@intel.com>2016-04-06 13:18:18 +0200
commit49ddf8e6e2347cffdcf83d1ca2d04ff929820178 (patch)
tree93ae97699c3abf8d47a1c4571dfdfb466c955df6 /net/mac80211/key.c
parentmac80211: fix RX u64 stats consistency on 32-bit platforms (diff)
downloadlinux-49ddf8e6e2347cffdcf83d1ca2d04ff929820178.tar.xz
linux-49ddf8e6e2347cffdcf83d1ca2d04ff929820178.zip
mac80211: add fast-rx path
The regular RX path has a lot of code, but with a few assumptions on the hardware it's possible to reduce the amount of code significantly. Currently the assumptions on the driver are the following: * hardware/driver reordering buffer (if supporting aggregation) * hardware/driver decryption & PN checking (if using encryption) * hardware/driver did de-duplication * hardware/driver did A-MSDU deaggregation * AP_LINK_PS is used (in AP mode) * no client powersave handling in mac80211 (in client mode) of which some are actually checked per packet: * de-duplication * PN checking * decryption and additionally packets must * not be A-MSDU (have been deaggregated by driver/device) * be data packets * not be fragmented * be unicast * have RFC 1042 header Additionally dynamically we assume: * no encryption or CCMP/GCMP, TKIP/WEP/other not allowed * station must be authorized * 4-addr format not enabled Some data needed for the RX path is cached in a new per-station "fast_rx" structure, so that we only need to look at this and the packet, no other memory when processing packets on the fast RX path. After doing the above per-packet checks, the data path collapses down to a pretty simple conversion function taking advantage of the data cached in the small fast_rx struct. This should speed up the RX processing, and will make it easier to reason about parallelizing RX (for which statistics will need to be per-CPU still.) Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/key.c')
-rw-r--r--net/mac80211/key.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 3df7b0392d30..edd6f2945f69 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -338,6 +338,7 @@ static void ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
} else {
rcu_assign_pointer(sta->gtk[idx], new);
}
+ ieee80211_check_fast_rx(sta);
} else {
defunikey = old &&
old == key_mtx_dereference(sdata->local,