summaryrefslogtreecommitdiff
path: root/net/wireless/mesh.c
diff options
context:
space:
mode:
authorLinus Lüssing <ll@simonwunderlich.de>2020-06-17 10:30:33 +0300
committerJohannes Berg <johannes.berg@intel.com>2020-07-31 10:24:23 +0300
commite3718a611470d311a92c60d4eb535270b49a7108 (patch)
tree3e5daf705d3dfd6cc2a128623e0e4dbc897d8aac /net/wireless/mesh.c
parent2f1805ea209a146669e0b660633ed22f49e1dd49 (diff)
downloadlinux-e3718a611470d311a92c60d4eb535270b49a7108.tar.xz
cfg80211/mac80211: add mesh_param "mesh_nolearn" to skip path discovery
Currently, before being able to forward a packet between two 802.11s nodes, both a PLINK handshake is performed upon receiving a beacon and then later a PREQ/PREP exchange for path discovery is performed on demand upon receiving a data frame to forward. When running a mesh protocol on top of an 802.11s interface, like batman-adv, we do not need the multi-hop mesh routing capabilities of 802.11s and usually set mesh_fwding=0. However, even with mesh_fwding=0 the PREQ/PREP path discovery is still performed on demand. Even though in this scenario the next hop PREQ/PREP will determine is always the direct 11s neighbor node. The new mesh_nolearn parameter allows to skip the PREQ/PREP exchange in this scenario, leading to a reduced delay, reduced packet buffering and simplifies HWMP in general. mesh_nolearn is still rather conservative in that if the packet destination is not a direct 11s neighbor, it will fall back to PREQ/PREP path discovery. For normal, multi-hop 802.11s mesh routing it is usually not advisable to enable mesh_nolearn as a transmission to a direct but distant neighbor might be worse than reaching that same node via a more robust / higher throughput etc. multi-hop path. Cc: Sven Eckelmann <sven@narfation.org> Cc: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Linus Lüssing <ll@simonwunderlich.de> Link: https://lore.kernel.org/r/20200617073034.26149-1-linus.luessing@c0d3.blue [fix nl80211 policy to range 0/1 only] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/mesh.c')
-rw-r--r--net/wireless/mesh.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index eac5aa1419fc..e4e363138279 100644
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -78,6 +78,7 @@ const struct mesh_config default_mesh_config = {
.power_mode = NL80211_MESH_POWER_ACTIVE,
.dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
.plink_timeout = MESH_DEFAULT_PLINK_TIMEOUT,
+ .dot11MeshNolearn = false,
};
const struct mesh_setup default_mesh_setup = {