nl80211: Add set/get for frag/rts threshold and retry limits

Add new nl80211 attributes that can be used with NL80211_CMD_SET_WIPHY
and NL80211_CMD_GET_WIPHY to manage fragmentation/RTS threshold and
retry limits.

Since these values are stored in struct wiphy, remove the local copy
from mac80211 where feasible (frag & rts threshold). The retry limits
are currently needed in struct ieee80211_conf, but these could be
eventually removed since the driver should have access to the values
in struct wiphy.

Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 25ce3e42bd10..dc9d9ec5d1ae 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -46,8 +46,10 @@
  *      to get a list of all present wiphys.
  * @NL80211_CMD_SET_WIPHY: set wiphy parameters, needs %NL80211_ATTR_WIPHY or
  *      %NL80211_ATTR_IFINDEX; can be used to set %NL80211_ATTR_WIPHY_NAME,
- *      %NL80211_ATTR_WIPHY_TXQ_PARAMS, %NL80211_ATTR_WIPHY_FREQ, and/or
- *      %NL80211_ATTR_WIPHY_CHANNEL_TYPE.
+ *      %NL80211_ATTR_WIPHY_TXQ_PARAMS, %NL80211_ATTR_WIPHY_FREQ,
+ *      %NL80211_ATTR_WIPHY_CHANNEL_TYPE, %NL80211_ATTR_WIPHY_RETRY_SHORT,
+ *      %NL80211_ATTR_WIPHY_RETRY_LONG, %NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
+ *      and/or %NL80211_ATTR_WIPHY_RTS_THRESHOLD.
  * @NL80211_CMD_NEW_WIPHY: Newly created wiphy, response to get request
  *      or rename notification. Has attributes %NL80211_ATTR_WIPHY and
  *      %NL80211_ATTR_WIPHY_NAME.
@@ -337,6 +339,18 @@ enum nl80211_commands {
  *      NL80211_CHAN_HT20 = HT20 only
  *      NL80211_CHAN_HT40MINUS = secondary channel is below the primary channel
  *      NL80211_CHAN_HT40PLUS = secondary channel is above the primary channel
+ * @NL80211_ATTR_WIPHY_RETRY_SHORT: TX retry limit for frames whose length is
+ *      less than or equal to the RTS threshold; allowed range: 1..255;
+ *      dot11ShortRetryLimit; u8
+ * @NL80211_ATTR_WIPHY_RETRY_LONG: TX retry limit for frames whose length is
+ *      greater than the RTS threshold; allowed range: 1..255;
+ *      dot11ShortLongLimit; u8
+ * @NL80211_ATTR_WIPHY_FRAG_THRESHOLD: fragmentation threshold, i.e., maximum
+ *      length in octets for frames; allowed range: 256..8000, disable
+ *      fragmentation with (u32)-1; dot11FragmentationThreshold; u32
+ * @NL80211_ATTR_WIPHY_RTS_THRESHOLD: RTS threshold (TX frames with length
+ *      larger than or equal to this use RTS/CTS handshake); allowed range:
+ *      0..65536, disable with (u32)-1; dot11RTSThreshold; u32
  *
  * @NL80211_ATTR_IFINDEX: network interface index of the device to operate on
  * @NL80211_ATTR_IFNAME: network interface name
@@ -565,6 +579,12 @@ enum nl80211_attrs {
 
         NL80211_ATTR_FREQ_FIXED,
 
+
+        NL80211_ATTR_WIPHY_RETRY_SHORT,
+        NL80211_ATTR_WIPHY_RETRY_LONG,
+        NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
+        NL80211_ATTR_WIPHY_RTS_THRESHOLD,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,