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 4.14-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-4.14 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 13:45:42 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@verizon.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 @@ -797,7 +797,7 @@ 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; @@ -808,7 +808,7 @@ 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)) @@ -825,7 +825,10 @@ 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) { @@ -838,7 +841,7 @@ 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; } @@ -856,7 +859,7 @@ 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 */ @@ -876,7 +879,7 @@ 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-4.14/mac80211-fix-the-update-of-path-metric-for-rann-frame.patch