{nl,cfg,mac}80211: let userspace set RANN interval

Allow userspace to set Root Announcement Interval for our mesh
interface. Also, RANN interval is now in proper units of TUs.

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

9 files changed, 27 insertions, 6 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 89dec16b4697..20353bb44840 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1861,6 +1861,9 @@ enum nl80211_mntr_flags {
  * @NL80211_MESHCONF_ELEMENT_TTL: specifies the value of TTL field set at a
  * source mesh point for path selection elements.
  *
+ * @NL80211_MESHCONF_HWMP_RANN_INTERVAL:  The interval of time (in TUs) between
+ * root announcements are transmitted.
+ *
  * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute
  *
  * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
@@ -1882,6 +1885,7 @@ enum nl80211_meshconf_params {
         NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
         NL80211_MESHCONF_HWMP_ROOTMODE,
         NL80211_MESHCONF_ELEMENT_TTL,
+        NL80211_MESHCONF_HWMP_RANN_INTERVAL,
 
         /* keep last */
         __NL80211_MESHCONF_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index d29d11a31f5a..4f0d12e349d1 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -755,6 +755,7 @@ struct mesh_config {
         u16 dot11MeshHWMPpreqMinInterval;
         u16 dot11MeshHWMPnetDiameterTraversalTime;
         u8  dot11MeshHWMPRootMode;
+        u16 dot11MeshHWMPRannInterval;
 };
 
 /**
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index c1fa5775cef2..9995c83c2420 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1137,6 +1137,10 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy,
                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
                 ieee80211_mesh_root_setup(ifmsh);
         }
+        if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask)) {
+                conf->dot11MeshHWMPRannInterval =
+                        nconf->dot11MeshHWMPRannInterval;
+        }
         return 0;
 }
 
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 75ece3d3b6dd..bac94434a874 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -372,6 +372,8 @@ IEEE80211_IF_FILE(min_discovery_timeout,
                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPRannInterval,
+                u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC);
 #endif
 
 
@@ -486,6 +488,7 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
         MESHPARAMS_ADD(path_refresh_time);
         MESHPARAMS_ADD(min_discovery_timeout);
         MESHPARAMS_ADD(dot11MeshHWMPRootMode);
+        MESHPARAMS_ADD(dot11MeshHWMPRannInterval);
 #undef MESHPARAMS_ADD
 }
 #endif
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index e120fefb4e40..1c4f53c31ae5 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -537,7 +537,8 @@ static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
 
         mesh_path_tx_root_frame(sdata);
         mod_timer(&ifmsh->mesh_path_root_timer,
-                  round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL));
+                  round_jiffies(jiffies +
+                          usecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPRannInterval * 1024)));
 }
 
 #ifdef CONFIG_PM
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 9d9116e1a9ac..20272072171f 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -175,7 +175,6 @@ struct mesh_rmc {
 
 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
-#define IEEE80211_MESH_RANN_INTERVAL         (1 * HZ)
 
 #define MESH_DEFAULT_BEACON_INTERVAL            1000    /* in 1024 us units */
 
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 7b517c46100d..ae3de755fada 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -695,7 +695,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
         u8 ttl, flags, hopcount;
         u8 *orig_addr;
         u32 orig_sn, metric;
-        u32 interval = cpu_to_le32(IEEE80211_MESH_RANN_INTERVAL);
+        u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
         bool root_is_gate;
 
         ttl = rann->rann_ttl;
@@ -743,7 +743,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
                 mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
                                        cpu_to_le32(orig_sn),
                                        0, NULL, 0, broadcast_addr,
-                                       hopcount, ttl, interval,
+                                       hopcount, ttl, cpu_to_le32(interval),
                                        cpu_to_le32(metric + mpath->metric),
                                        0, sdata);
                 mpath->sn = orig_sn;
@@ -1044,11 +1044,11 @@ void
 mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
 {
         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
-        u32 interval = cpu_to_le32(IEEE80211_MESH_RANN_INTERVAL);
+        u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
 
         mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->vif.addr,
                                cpu_to_le32(++ifmsh->sn),
                                0, NULL, 0, broadcast_addr,
                                0, sdata->u.mesh.mshcfg.element_ttl,
-                               interval, 0, 0, sdata);
+                               cpu_to_le32(interval), 0, 0, sdata);
 }
diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index 5c116083eeca..b5a39d4d1dcf 100644
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -12,6 +12,7 @@
 #define MESH_HOLD_T             100
 
 #define MESH_PATH_TIMEOUT       5000
+#define MESH_RANN_INTERVAL      5000
 
 /*
  * Minimum interval between two consecutive PREQs originated by the same
@@ -49,6 +50,7 @@ const struct mesh_config default_mesh_config = {
         .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
         .path_refresh_time = MESH_PATH_REFRESH_TIME,
         .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
+        .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
 };
 
 const struct mesh_setup default_mesh_setup = {
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 93ee888b1059..bbf3d7384a6b 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3035,6 +3035,8 @@ static int nl80211_get_mesh_config(struct sk_buff *skb,
                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
                         cur_params.dot11MeshHWMPRootMode);
+        NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
+                        cur_params.dot11MeshHWMPRannInterval);
         nla_nest_end(msg, pinfoattr);
         genlmsg_end(msg, hdr);
         return genlmsg_reply(msg, info);
@@ -3063,6 +3065,7 @@ static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_A
         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
+        [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
 };
 
 static const struct nla_policy
@@ -3141,6 +3144,10 @@ do {\
                         dot11MeshHWMPRootMode, mask,
                         NL80211_MESHCONF_HWMP_ROOTMODE,
                         nla_get_u8);
+        FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
+                        dot11MeshHWMPRannInterval, mask,
+                        NL80211_MESHCONF_HWMP_RANN_INTERVAL,
+                        nla_get_u16);
         if (mask_out)
                 *mask_out = mask;