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-rw-r--r--package/kernel/mac80211/patches/328-mac80211-let-unused-MPP-table-entries-timeout.patch104
1 files changed, 104 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/328-mac80211-let-unused-MPP-table-entries-timeout.patch b/package/kernel/mac80211/patches/328-mac80211-let-unused-MPP-table-entries-timeout.patch
new file mode 100644
index 0000000..740993c
--- /dev/null
+++ b/package/kernel/mac80211/patches/328-mac80211-let-unused-MPP-table-entries-timeout.patch
@@ -0,0 +1,104 @@
+From: Henning Rogge <hrogge@gmail.com>
+Date: Wed, 3 Feb 2016 13:58:37 +0100
+Subject: [PATCH] mac80211: let unused MPP table entries timeout
+
+Remember the last time when a mpp table entry is used for
+rx or tx and remove them after MESH_PATH_EXPIRE time.
+
+Acked-by: Bob Copeland <me@bobcopeland.com>
+Signed-off-by: Henning Rogge <henning.rogge@fkie.fraunhofer.de>
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/net/mac80211/mesh_pathtbl.c
++++ b/net/mac80211/mesh_pathtbl.c
+@@ -942,6 +942,46 @@ enddel:
+ }
+
+ /**
++ * mpp_path_del - delete a mesh proxy path from the table
++ *
++ * @addr: addr address (ETH_ALEN length)
++ * @sdata: local subif
++ *
++ * Returns: 0 if successful
++ */
++static int mpp_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
++{
++ struct mesh_table *tbl;
++ struct mesh_path *mpath;
++ struct mpath_node *node;
++ struct hlist_head *bucket;
++ int hash_idx;
++ int err = 0;
++
++ read_lock_bh(&pathtbl_resize_lock);
++ tbl = resize_dereference_mpp_paths();
++ hash_idx = mesh_table_hash(addr, sdata, tbl);
++ bucket = &tbl->hash_buckets[hash_idx];
++
++ spin_lock(&tbl->hashwlock[hash_idx]);
++ hlist_for_each_entry(node, bucket, list) {
++ mpath = node->mpath;
++ if (mpath->sdata == sdata &&
++ ether_addr_equal(addr, mpath->dst)) {
++ __mesh_path_del(tbl, node);
++ goto enddel;
++ }
++ }
++
++ err = -ENXIO;
++enddel:
++ mesh_paths_generation++;
++ spin_unlock(&tbl->hashwlock[hash_idx]);
++ read_unlock_bh(&pathtbl_resize_lock);
++ return err;
++}
++
++/**
+ * mesh_path_tx_pending - sends pending frames in a mesh path queue
+ *
+ * @mpath: mesh path to activate
+@@ -1157,6 +1197,17 @@ void mesh_path_expire(struct ieee80211_s
+ time_after(jiffies, mpath->exp_time + MESH_PATH_EXPIRE))
+ mesh_path_del(mpath->sdata, mpath->dst);
+ }
++
++ tbl = rcu_dereference(mpp_paths);
++ for_each_mesh_entry(tbl, node, i) {
++ if (node->mpath->sdata != sdata)
++ continue;
++ mpath = node->mpath;
++ if ((!(mpath->flags & MESH_PATH_FIXED)) &&
++ time_after(jiffies, mpath->exp_time + MESH_PATH_EXPIRE))
++ mpp_path_del(mpath->sdata, mpath->dst);
++ }
++
+ rcu_read_unlock();
+ }
+
+--- a/net/mac80211/rx.c
++++ b/net/mac80211/rx.c
+@@ -2291,6 +2291,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
+ spin_lock_bh(&mppath->state_lock);
+ if (!ether_addr_equal(mppath->mpp, mpp_addr))
+ memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
++ mppath->exp_time = jiffies;
+ spin_unlock_bh(&mppath->state_lock);
+ }
+ rcu_read_unlock();
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -2171,8 +2171,11 @@ static struct sk_buff *ieee80211_build_h
+ mpp_lookup = true;
+ }
+
+- if (mpp_lookup)
++ if (mpp_lookup) {
+ mppath = mpp_path_lookup(sdata, skb->data);
++ if (mppath)
++ mppath->exp_time = jiffies;
++ }
+
+ if (mppath && mpath)
+ mesh_path_del(mpath->sdata, mpath->dst);