Add nl80211 commands to get and set o11s mesh networking parameters

The two new commands are NL80211_CMD_GET_MESH_PARAMS and
NL80211_CMD_SET_MESH_PARAMS. There is a new attribute enum,
NL80211_ATTR_MESH_PARAMS, which enumerates the various mesh configuration
parameters.

Moved struct mesh_config from mac80211/ieee80211_i.h to net/cfg80211.h.
nl80211_get_mesh_params and nl80211_set_mesh_params unpack the netlink messages
and ask the driver to get or set the configuration.  This is done via two new
function stubs, get_mesh_params and set_mesh_params, in struct cfg80211_ops.

Signed-off-by: Colin McCabe <colin@cozybit.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 117 insertions, 1 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 41720d47d618..e4cc7869b22f 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -106,6 +106,12 @@
  *      to the the specified ISO/IEC 3166-1 alpha2 country code. The core will
  *      store this as a valid request and then query userspace for it.
  *
+ * @NL80211_CMD_GET_MESH_PARAMS: Get mesh networking properties for the
+ *      interface identified by %NL80211_ATTR_IFINDEX
+ *
+ * @NL80211_CMD_SET_MESH_PARAMS: Set mesh networking properties for the
+ *      interface identified by %NL80211_ATTR_IFINDEX
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -148,6 +154,9 @@ enum nl80211_commands {
         NL80211_CMD_SET_REG,
         NL80211_CMD_REQ_SET_REG,
 
+        NL80211_CMD_GET_MESH_PARAMS,
+        NL80211_CMD_SET_MESH_PARAMS,
+
         /* add new commands above here */
 
         /* used to define NL80211_CMD_MAX below */
@@ -296,6 +305,8 @@ enum nl80211_attrs {
         NL80211_ATTR_REG_ALPHA2,
         NL80211_ATTR_REG_RULES,
 
+        NL80211_ATTR_MESH_PARAMS,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
@@ -606,4 +617,79 @@ enum nl80211_mntr_flags {
         NL80211_MNTR_FLAG_MAX = __NL80211_MNTR_FLAG_AFTER_LAST - 1
 };
 
+/**
+ * enum nl80211_meshconf_params - mesh configuration parameters
+ *
+ * Mesh configuration parameters
+ *
+ * @__NL80211_MESHCONF_INVALID: internal use
+ *
+ * @NL80211_MESHCONF_RETRY_TIMEOUT: specifies the initial retry timeout in
+ * millisecond units, used by the Peer Link Open message
+ *
+ * @NL80211_MESHCONF_CONFIRM_TIMEOUT: specifies the inital confirm timeout, in
+ * millisecond units, used by the peer link management to close a peer link
+ *
+ * @NL80211_MESHCONF_HOLDING_TIMEOUT: specifies the holding timeout, in
+ * millisecond units
+ *
+ * @NL80211_MESHCONF_MAX_PEER_LINKS: maximum number of peer links allowed
+ * on this mesh interface
+ *
+ * @NL80211_MESHCONF_MAX_RETRIES: specifies the maximum number of peer link
+ * open retries that can be sent to establish a new peer link instance in a
+ * mesh
+ *
+ * @NL80211_MESHCONF_TTL: specifies the value of TTL field set at a source mesh
+ * point.
+ *
+ * @NL80211_MESHCONF_AUTO_OPEN_PLINKS: whether we should automatically
+ * open peer links when we detect compatible mesh peers.
+ *
+ * @NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES: the number of action frames
+ * containing a PREQ that an MP can send to a particular destination (path
+ * target)
+ *
+ * @NL80211_MESHCONF_PATH_REFRESH_TIME: how frequently to refresh mesh paths
+ * (in milliseconds)
+ *
+ * @NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT: minimum length of time to wait
+ * until giving up on a path discovery (in milliseconds)
+ *
+ * @NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT: The time (in TUs) for which mesh
+ * points receiving a PREQ shall consider the forwarding information from the
+ * root to be valid. (TU = time unit)
+ *
+ * @NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL: The minimum interval of time (in
+ * TUs) during which an MP can send only one action frame containing a PREQ
+ * reference element
+ *
+ * @NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME: The interval of time (in TUs)
+ * that it takes for an HWMP information element to propagate across the mesh
+ *
+ * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute
+ *
+ * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
+ */
+enum nl80211_meshconf_params {
+        __NL80211_MESHCONF_INVALID,
+        NL80211_MESHCONF_RETRY_TIMEOUT,
+        NL80211_MESHCONF_CONFIRM_TIMEOUT,
+        NL80211_MESHCONF_HOLDING_TIMEOUT,
+        NL80211_MESHCONF_MAX_PEER_LINKS,
+        NL80211_MESHCONF_MAX_RETRIES,
+        NL80211_MESHCONF_TTL,
+        NL80211_MESHCONF_AUTO_OPEN_PLINKS,
+        NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
+        NL80211_MESHCONF_PATH_REFRESH_TIME,
+        NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
+        NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
+        NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
+        NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
+
+        /* keep last */
+        __NL80211_MESHCONF_ATTR_AFTER_LAST,
+        NL80211_MESHCONF_ATTR_MAX = __NL80211_MESHCONF_ATTR_AFTER_LAST - 1
+};
+
 #endif /* __LINUX_NL80211_H */
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 0e85ec39b638..03e1e88c6a09 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -347,6 +347,25 @@ struct ieee80211_regdomain {
         .flags = reg_flags, \
         }
 
+struct mesh_config {
+        /* Timeouts in ms */
+        /* Mesh plink management parameters */
+        u16 dot11MeshRetryTimeout;
+        u16 dot11MeshConfirmTimeout;
+        u16 dot11MeshHoldingTimeout;
+        u16 dot11MeshMaxPeerLinks;
+        u8  dot11MeshMaxRetries;
+        u8  dot11MeshTTL;
+        bool auto_open_plinks;
+        /* HWMP parameters */
+        u8  dot11MeshHWMPmaxPREQretries;
+        u32 path_refresh_time;
+        u16 min_discovery_timeout;
+        u32 dot11MeshHWMPactivePathTimeout;
+        u16 dot11MeshHWMPpreqMinInterval;
+        u16 dot11MeshHWMPnetDiameterTraversalTime;
+};
+
 /* from net/wireless.h */
 struct wiphy;
 
@@ -397,6 +416,12 @@ struct wiphy;
  *
  * @change_station: Modify a given station.
  *
+ * @get_mesh_params: Put the current mesh parameters into *params
+ *
+ * @set_mesh_params: Set mesh parameters.
+ *      The mask is a bitfield which tells us which parameters to
+ *      set, and which to leave alone.
+ *
  * @set_mesh_cfg: set mesh parameters (by now, just mesh id)
  *
  * @change_bss: Modify parameters for a given BSS.
@@ -452,7 +477,12 @@ struct cfg80211_ops {
         int     (*dump_mpath)(struct wiphy *wiphy, struct net_device *dev,
                                int idx, u8 *dst, u8 *next_hop,
                                struct mpath_info *pinfo);
-
+        int     (*get_mesh_params)(struct wiphy *wiphy,
+                                struct net_device *dev,
+                                struct mesh_config *conf);
+        int     (*set_mesh_params)(struct wiphy *wiphy,
+                                struct net_device *dev,
+                                const struct mesh_config *nconf, u32 mask);
         int     (*change_bss)(struct wiphy *wiphy, struct net_device *dev,
                               struct bss_parameters *params);
 };