This is a note to let you know that I've just added the patch titled
mac80211: fix the update of path metric for RANN frame
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: mac80211-fix-the-update-of-path-metric-for-rann-frame.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Thu Feb 1 14:00:34 CET 2018
From: Chun-Yeow Yeoh yeohchunyeow@gmail.com Date: Tue, 14 Nov 2017 23:20:05 +0800 Subject: mac80211: fix the update of path metric for RANN frame
From: Chun-Yeow Yeoh yeohchunyeow@gmail.com
[ Upstream commit fbbdad5edf0bb59786a51b94a9d006bc8c2da9a2 ]
The previous path metric update from RANN frame has not considered the own link metric toward the transmitting mesh STA. Fix this.
Reported-by: Michael65535 Signed-off-by: Chun-Yeow Yeoh yeohchunyeow@gmail.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/mac80211/mesh_hwmp.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)
--- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -788,7 +788,7 @@ static void hwmp_rann_frame_process(stru struct mesh_path *mpath; u8 ttl, flags, hopcount; const u8 *orig_addr; - u32 orig_sn, metric, metric_txsta, interval; + u32 orig_sn, new_metric, orig_metric, last_hop_metric, interval; bool root_is_gate;
ttl = rann->rann_ttl; @@ -799,7 +799,7 @@ static void hwmp_rann_frame_process(stru interval = le32_to_cpu(rann->rann_interval); hopcount = rann->rann_hopcount; hopcount++; - metric = le32_to_cpu(rann->rann_metric); + orig_metric = le32_to_cpu(rann->rann_metric);
/* Ignore our own RANNs */ if (ether_addr_equal(orig_addr, sdata->vif.addr)) @@ -816,7 +816,10 @@ static void hwmp_rann_frame_process(stru return; }
- metric_txsta = airtime_link_metric_get(local, sta); + last_hop_metric = airtime_link_metric_get(local, sta); + new_metric = orig_metric + last_hop_metric; + if (new_metric < orig_metric) + new_metric = MAX_METRIC;
mpath = mesh_path_lookup(sdata, orig_addr); if (!mpath) { @@ -829,7 +832,7 @@ static void hwmp_rann_frame_process(stru }
if (!(SN_LT(mpath->sn, orig_sn)) && - !(mpath->sn == orig_sn && metric < mpath->rann_metric)) { + !(mpath->sn == orig_sn && new_metric < mpath->rann_metric)) { rcu_read_unlock(); return; } @@ -847,7 +850,7 @@ static void hwmp_rann_frame_process(stru }
mpath->sn = orig_sn; - mpath->rann_metric = metric + metric_txsta; + mpath->rann_metric = new_metric; mpath->is_root = true; /* Recording RANNs sender address to send individually * addressed PREQs destined for root mesh STA */ @@ -867,7 +870,7 @@ static void hwmp_rann_frame_process(stru mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr, orig_sn, 0, NULL, 0, broadcast_addr, hopcount, ttl, interval, - metric + metric_txsta, 0, sdata); + new_metric, 0, sdata); }
rcu_read_unlock();
Patches currently in stable-queue which might be from yeohchunyeow@gmail.com are
queue-4.9/mac80211-fix-the-update-of-path-metric-for-rann-frame.patch