package/kernel/mac80211/patches/subsys/323-mac80211-MBSSID-support-in-interface-handling.patch

   1 From: John Crispin <john@phrozen.org>
   2 Date: Wed, 15 Sep 2021 19:54:35 -0700
   3 Subject: [PATCH] mac80211: MBSSID support in interface handling
   4
   5 Configure multiple BSSID and enhanced multi-BSSID advertisement (EMA)
   6 parameters in mac80211 for AP mode.
   7
   8 For each interface, 'mbssid_tx_vif' points to the transmitting interface of
   9 the MBSSID set. The pointer is set to NULL if MBSSID is disabled.
  10
  11 Function ieee80211_stop() is modified to always bring down all the
  12 non-transmitting interfaces first and the transmitting interface last.
  13
  14 Signed-off-by: John Crispin <john@phrozen.org>
  15 Co-developed-by: Aloka Dixit <alokad@codeaurora.org>
  16 Signed-off-by: Aloka Dixit <alokad@codeaurora.org>
  17 Link: https://lore.kernel.org/r/20210916025437.29138-3-alokad@codeaurora.org
  18 [slightly change logic to be more obvious]
  19 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  20 ---
  21
  22 --- a/include/net/mac80211.h
  23 +++ b/include/net/mac80211.h
  24 @@ -1719,6 +1719,7 @@ enum ieee80211_offload_flags {
  25   *     write-protected by sdata_lock and local->mtx so holding either is fine
  26   *     for read access.
  27   * @color_change_color: the bss color that will be used after the change.
  28 + * @mbssid_tx_vif: Pointer to the transmitting interface if MBSSID is enabled.
  29   */
  30  struct ieee80211_vif {
  31         enum nl80211_iftype type;
  32 @@ -1750,6 +1751,8 @@ struct ieee80211_vif {
  33         bool color_change_active;
  34         u8 color_change_color;
  35
  36 +       struct ieee80211_vif *mbssid_tx_vif;
  37 +
  38         /* must be last */
  39         u8 drv_priv[] __aligned(sizeof(void *));
  40  };
  41 --- a/net/mac80211/cfg.c
  42 +++ b/net/mac80211/cfg.c
  43 @@ -112,6 +112,36 @@ static int ieee80211_set_mon_options(str
  44         return 0;
  45  }
  46
  47 +static int ieee80211_set_ap_mbssid_options(struct ieee80211_sub_if_data *sdata,
  48 +                                          struct cfg80211_mbssid_config params)
  49 +{
  50 +       struct ieee80211_sub_if_data *tx_sdata;
  51 +
  52 +       sdata->vif.mbssid_tx_vif = NULL;
  53 +       sdata->vif.bss_conf.bssid_index = 0;
  54 +       sdata->vif.bss_conf.nontransmitted = false;
  55 +       sdata->vif.bss_conf.ema_ap = false;
  56 +
  57 +       if (sdata->vif.type != NL80211_IFTYPE_AP || !params.tx_wdev)
  58 +               return -EINVAL;
  59 +
  60 +       tx_sdata = IEEE80211_WDEV_TO_SUB_IF(params.tx_wdev);
  61 +       if (!tx_sdata)
  62 +               return -EINVAL;
  63 +
  64 +       if (tx_sdata == sdata) {
  65 +               sdata->vif.mbssid_tx_vif = &sdata->vif;
  66 +       } else {
  67 +               sdata->vif.mbssid_tx_vif = &tx_sdata->vif;
  68 +               sdata->vif.bss_conf.nontransmitted = true;
  69 +               sdata->vif.bss_conf.bssid_index = params.index;
  70 +       }
  71 +       if (params.ema)
  72 +               sdata->vif.bss_conf.ema_ap = true;
  73 +
  74 +       return 0;
  75 +}
  76 +
  77  static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
  78                                                 const char *name,
  79                                                 unsigned char name_assign_type,
  80 @@ -1107,6 +1137,14 @@ static int ieee80211_start_ap(struct wip
  81                         changed |= BSS_CHANGED_HE_BSS_COLOR;
  82         }
  83
  84 +       if (sdata->vif.type == NL80211_IFTYPE_AP &&
  85 +           params->mbssid_config.tx_wdev) {
  86 +               err = ieee80211_set_ap_mbssid_options(sdata,
  87 +                                                     params->mbssid_config);
  88 +               if (err)
  89 +                       return err;
  90 +       }
  91 +
  92         mutex_lock(&local->mtx);
  93         err = ieee80211_vif_use_channel(sdata, &params->chandef,
  94                                         IEEE80211_CHANCTX_SHARED);
  95 --- a/net/mac80211/iface.c
  96 +++ b/net/mac80211/iface.c
  97 @@ -632,17 +632,46 @@ static void ieee80211_do_stop(struct iee
  98                 ieee80211_add_virtual_monitor(local);
  99  }
 100
 101 +static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
 102 +{
 103 +       struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
 104 +       struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
 105 +
 106 +       if (!tx_vif)
 107 +               return;
 108 +
 109 +       tx_sdata = vif_to_sdata(tx_vif);
 110 +       sdata->vif.mbssid_tx_vif = NULL;
 111 +
 112 +       list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
 113 +                                &tx_sdata->local->interfaces, list) {
 114 +               if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
 115 +                   non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
 116 +                   ieee80211_sdata_running(non_tx_sdata)) {
 117 +                       non_tx_sdata->vif.mbssid_tx_vif = NULL;
 118 +                       dev_close(non_tx_sdata->wdev.netdev);
 119 +               }
 120 +       }
 121 +
 122 +       if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
 123 +               tx_sdata->vif.mbssid_tx_vif = NULL;
 124 +               dev_close(tx_sdata->wdev.netdev);
 125 +       }
 126 +}
 127 +
 128  static int ieee80211_stop(struct net_device *dev)
 129  {
 130         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 131
 132 -       /* close all dependent VLAN interfaces before locking wiphy */
 133 +       /* close dependent VLAN and MBSSID interfaces before locking wiphy */
 134         if (sdata->vif.type == NL80211_IFTYPE_AP) {
 135                 struct ieee80211_sub_if_data *vlan, *tmpsdata;
 136
 137                 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
 138                                          u.vlan.list)
 139                         dev_close(vlan->dev);
 140 +
 141 +               ieee80211_stop_mbssid(sdata);
 142         }
 143
 144         wiphy_lock(sdata->local->hw.wiphy);