package/kernel/mac80211/patches/327-mac80211-Remove-MPP-table-entries-with-MPath.patch

   1 From: Henning Rogge <hrogge@gmail.com>
   2 Date: Wed, 3 Feb 2016 13:58:36 +0100
   3 Subject: [PATCH] mac80211: Remove MPP table entries with MPath
   4
   5 Make the mesh_path_del() function remove all mpp table entries
   6 that are proxied by the removed mesh path.
   7
   8 Acked-by: Bob Copeland <me@bobcopeland.com>
   9 Signed-off-by: Henning Rogge <henning.rogge@fkie.fraunhofer.de>
  10 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  11 ---
  12
  13 --- a/net/mac80211/mesh_pathtbl.c
  14 +++ b/net/mac80211/mesh_pathtbl.c
  15 @@ -835,6 +835,29 @@ void mesh_path_flush_by_nexthop(struct s
  16         rcu_read_unlock();
  17  }
  18
  19 +static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
  20 +                              const u8 *proxy)
  21 +{
  22 +       struct mesh_table *tbl;
  23 +       struct mesh_path *mpp;
  24 +       struct mpath_node *node;
  25 +       int i;
  26 +
  27 +       rcu_read_lock();
  28 +       read_lock_bh(&pathtbl_resize_lock);
  29 +       tbl = resize_dereference_mpp_paths();
  30 +       for_each_mesh_entry(tbl, node, i) {
  31 +               mpp = node->mpath;
  32 +               if (ether_addr_equal(mpp->mpp, proxy)) {
  33 +                       spin_lock(&tbl->hashwlock[i]);
  34 +                       __mesh_path_del(tbl, node);
  35 +                       spin_unlock(&tbl->hashwlock[i]);
  36 +               }
  37 +       }
  38 +       read_unlock_bh(&pathtbl_resize_lock);
  39 +       rcu_read_unlock();
  40 +}
  41 +
  42  static void table_flush_by_iface(struct mesh_table *tbl,
  43                                  struct ieee80211_sub_if_data *sdata)
  44  {
  45 @@ -892,6 +915,9 @@ int mesh_path_del(struct ieee80211_sub_i
  46         int hash_idx;
  47         int err = 0;
  48
  49 +       /* flush relevant mpp entries first */
  50 +       mpp_flush_by_proxy(sdata, addr);
  51 +
  52         read_lock_bh(&pathtbl_resize_lock);
  53         tbl = resize_dereference_mesh_paths();
  54         hash_idx = mesh_table_hash(addr, sdata, tbl);