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authorHenning Rogge <hrogge@gmail.com>2016-02-03 15:58:37 +0300
committerJohannes Berg <johannes.berg@intel.com>2016-02-24 11:04:35 +0300
commitab1c7906b0bead549065a3a2def5aeda21818c99 (patch)
tree46bc0624697c12e809b80a6bd3a4c489e8272a88 /net/mac80211/mesh_pathtbl.c
parentbf5a70e105820eb214d3f33376cf6a3011d2e20c (diff)
downloadlinux-ab1c7906b0bead549065a3a2def5aeda21818c99.tar.xz
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>
Diffstat (limited to 'net/mac80211/mesh_pathtbl.c')
-rw-r--r--net/mac80211/mesh_pathtbl.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 40ed206b0f60..29e50407507a 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -941,6 +941,46 @@ 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
@@ -1154,6 +1194,17 @@ void mesh_path_expire(struct ieee80211_sub_if_data *sdata)
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();
}