{nl,cfg}80211: make peer link expiration time configurable

If a STA has a peer that it hasn't seen any tx activity
from for a certain length of time, the peer link is
expired. This means the inactive STA is removed from the
list of peers and that STA is not considered a peer again
unless it re-peers.  Previously, this inactivity time was
always 30 minutes.  Now, add it to the mesh configuration
and allow it to be configured.  Retain 30 minutes as a
default value.

Signed-off-by: Colleen Twitty <colleen@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 9 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 855c76ccff38..31ca11672ca8 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1124,6 +1124,9 @@ struct bss_parameters {
  *      setting for new peer links.
  * @dot11MeshAwakeWindowDuration: The duration in TUs the STA will remain awake
  *      after transmitting its beacon.
+ * @plink_timeout: If no tx activity is seen from a STA we've established
+ *      peering with for longer than this time (in seconds), then remove it
+ *      from the STA's list of peers.  Default is 30 minutes.
  */
 struct mesh_config {
         u16 dot11MeshRetryTimeout;
@@ -1153,6 +1156,7 @@ struct mesh_config {
         u16 dot11MeshHWMPconfirmationInterval;
         enum nl80211_mesh_power_mode power_mode;
         u16 dot11MeshAwakeWindowDuration;
+        u32 plink_timeout;
 };
 
 /**
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 1f0019d4cce6..ca6facf4df0c 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2577,6 +2577,10 @@ enum nl80211_mesh_power_mode {
  *
  * @NL80211_MESHCONF_AWAKE_WINDOW: awake window duration (in TUs)
  *
+ * @NL80211_MESHCONF_PLINK_TIMEOUT: If no tx activity is seen from a STA we've
+ *      established peering with for longer than this time (in seconds), then
+ *      remove it from the STA's list of peers.  Default is 30 minutes.
+ *
  * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
  */
 enum nl80211_meshconf_params {
@@ -2608,6 +2612,7 @@ enum nl80211_meshconf_params {
         NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
         NL80211_MESHCONF_POWER_MODE,
         NL80211_MESHCONF_AWAKE_WINDOW,
+        NL80211_MESHCONF_PLINK_TIMEOUT,
 
         /* keep last */
         __NL80211_MESHCONF_ATTR_AFTER_LAST,