nl80211: Let userspace drive the peer link management states.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 60 insertions, 32 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index c53b916036c5..de96783954a1 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -913,6 +913,9 @@ enum nl80211_commands {
  * @NL80211_ATTR_SUPPORT_MESH_AUTH: Currently, this means the underlying driver
  *      allows auth frames in a mesh to be passed to userspace for processing via
  *      the @NL80211_MESH_SETUP_USERSPACE_AUTH flag.
+ * @NL80211_ATTR_STA_PLINK_STATE: The state of a mesh peer link. Used when
+ *      userspace is driving the peer link management state machine.
+ *      @NL80211_MESH_SETUP_USERSPACE_AMPE must be enabled.
  *
  * @NL80211_ATTR_WOWLAN_SUPPORTED: indicates, as part of the wiphy capabilities,
  *      the supported WoWLAN triggers
@@ -1109,6 +1112,7 @@ enum nl80211_attrs {
         NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 
         NL80211_ATTR_SUPPORT_MESH_AUTH,
+        NL80211_ATTR_STA_PLINK_STATE,
 
         NL80211_ATTR_WOWLAN_TRIGGERS,
         NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 10c17d68059f..4b0d035be64f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -372,6 +372,33 @@ enum plink_actions {
 };
 
 /**
+ * enum plink_states - state of a mesh peer link finite state machine
+ *
+ * @PLINK_LISTEN: initial state, considered the implicit state of non
+ * existant mesh peer links
+ * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh
+ * peer @PLINK_OPN_RCVD: mesh plink open frame has been received from
+ * this mesh peer
+ * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from
+ * this mesh peer
+ * @PLINK_ESTAB: mesh peer link is established
+ * @PLINK_HOLDING: mesh peer link is being closed or cancelled
+ * @PLINK_BLOCKED: all frames transmitted from this mesh plink are
+ * discarded
+ * @PLINK_INVALID: reserved
+ */
+enum plink_state {
+        PLINK_LISTEN,
+        PLINK_OPN_SNT,
+        PLINK_OPN_RCVD,
+        PLINK_CNF_RCVD,
+        PLINK_ESTAB,
+        PLINK_HOLDING,
+        PLINK_BLOCKED,
+        PLINK_INVALID,
+};
+
+/**
  * struct station_parameters - station parameters
  *
  * Used to change and create a new station.
@@ -387,6 +414,7 @@ enum plink_actions {
  * @listen_interval: listen interval or -1 for no change
  * @aid: AID or zero for no change
  * @plink_action: plink action to take
+ * @plink_state: set the peer link state for a station
  * @ht_capa: HT capabilities of station
  */
 struct station_parameters {
@@ -397,6 +425,7 @@ struct station_parameters {
         u16 aid;
         u8 supported_rates_len;
         u8 plink_action;
+        u8 plink_state;
         struct ieee80211_ht_cap *ht_capa;
 };
 
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 18c2555e04e6..51f775772d9e 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -734,15 +734,27 @@ static void sta_apply_parameters(struct ieee80211_local *local,
                                                   params->ht_capa,
                                                   &sta->sta.ht_cap);
 
-        if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
-                switch (params->plink_action) {
-                case PLINK_ACTION_OPEN:
-                        mesh_plink_open(sta);
-                        break;
-                case PLINK_ACTION_BLOCK:
-                        mesh_plink_block(sta);
-                        break;
-                }
+        if (ieee80211_vif_is_mesh(&sdata->vif)) {
+                if (sdata->u.mesh.security & IEEE80211_MESH_SEC_SECURED)
+                        switch (params->plink_state) {
+                        case PLINK_LISTEN:
+                        case PLINK_ESTAB:
+                        case PLINK_BLOCKED:
+                                sta->plink_state = params->plink_state;
+                                break;
+                        default:
+                                /*  nothing  */
+                                break;
+                        }
+                else
+                        switch (params->plink_action) {
+                        case PLINK_ACTION_OPEN:
+                                mesh_plink_open(sta);
+                                break;
+                        case PLINK_ACTION_BLOCK:
+                                mesh_plink_block(sta);
+                                break;
+                        }
         }
 }
 
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index af1a7f8c8675..f00b4dcb49d7 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -174,29 +174,6 @@ struct sta_ampdu_mlme {
 
 
 /**
- * enum plink_state - state of a mesh peer link finite state machine
- *
- * @PLINK_LISTEN: initial state, considered the implicit state of non existant
- *      mesh peer links
- * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer
- * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer
- * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh
- *      peer
- * @PLINK_ESTAB: mesh peer link is established
- * @PLINK_HOLDING: mesh peer link is being closed or cancelled
- * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded
- */
-enum plink_state {
-        PLINK_LISTEN,
-        PLINK_OPN_SNT,
-        PLINK_OPN_RCVD,
-        PLINK_CNF_RCVD,
-        PLINK_ESTAB,
-        PLINK_HOLDING,
-        PLINK_BLOCKED
-};
-
-/**
  * struct sta_info - STA information
  *
  * This structure collects information about a station that
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 64efc2d7a7ad..f698c1d116e4 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -174,6 +174,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
+        [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 };
 
 /* policy for the key attributes */
@@ -2247,6 +2248,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
         memset(&params, 0, sizeof(params));
 
         params.listen_interval = -1;
+        params.plink_state = PLINK_INVALID;
 
         if (info->attrs[NL80211_ATTR_STA_AID])
                 return -EINVAL;
@@ -2278,6 +2280,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
                 params.plink_action =
                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
 
+        if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
+                params.plink_state =
+                    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
+
         err = get_vlan(info, rdev, &params.vlan);
         if (err)
                 goto out;