{nl,cfg,mac}80211: implement dot11MeshHWMPconfirmationInterval
As defined in section 13.10.9.3 Case D (802.11-2012), this
control variable is used to limit the mesh STA to send only
one PREQ to a root mesh STA within this interval of time
(in TUs). The default value for this variable is set to
2000 TUs. However, for current implementation, the maximum
configurable of dot11MeshHWMPconfirmationInterval is
restricted by dot11MeshHWMPactivePathTimeout.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
[line-break commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 5bd316c..6e25ac4 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1596,6 +1596,9 @@
if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
conf->dot11MeshHWMProotInterval =
nconf->dot11MeshHWMProotInterval;
+ if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
+ conf->dot11MeshHWMPconfirmationInterval =
+ nconf->dot11MeshHWMPconfirmationInterval;
return 0;
}
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index a8cea70..512c894 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -514,6 +514,8 @@
u.mesh.mshcfg.dot11MeshHWMPactivePathToRootTimeout, DEC);
IEEE80211_IF_FILE(dot11MeshHWMProotInterval,
u.mesh.mshcfg.dot11MeshHWMProotInterval, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPconfirmationInterval,
+ u.mesh.mshcfg.dot11MeshHWMPconfirmationInterval, DEC);
#endif
#define DEBUGFS_ADD_MODE(name, mode) \
@@ -617,6 +619,7 @@
MESHPARAMS_ADD(ht_opmode);
MESHPARAMS_ADD(dot11MeshHWMPactivePathToRootTimeout);
MESHPARAMS_ADD(dot11MeshHWMProotInterval);
+ MESHPARAMS_ADD(dot11MeshHWMPconfirmationInterval);
#undef MESHPARAMS_ADD
}
#endif
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index c7400a2..faaa39b 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -104,6 +104,7 @@
* an mpath to a hash bucket on a path table.
* @rann_snd_addr: the RANN sender address
* @rann_metric: the aggregated path metric towards the root node
+ * @last_preq_to_root: Timestamp of last PREQ sent to root
* @is_root: the destination station of this path is a root node
* @is_gate: the destination station of this path is a mesh gate
*
@@ -131,6 +132,7 @@
spinlock_t state_lock;
u8 rann_snd_addr[ETH_ALEN];
u32 rann_metric;
+ unsigned long last_preq_to_root;
bool is_root;
bool is_gate;
};
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 35e3acb..bea5247 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -98,6 +98,8 @@
#define max_preq_retries(s) (s->u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries)
#define disc_timeout_jiff(s) \
msecs_to_jiffies(sdata->u.mesh.mshcfg.min_discovery_timeout)
+#define root_path_confirmation_jiffies(s) \
+ msecs_to_jiffies(sdata->u.mesh.mshcfg.dot11MeshHWMPconfirmationInterval)
enum mpath_frame_type {
MPATH_PREQ = 0,
@@ -811,11 +813,14 @@
}
if ((!(mpath->flags & (MESH_PATH_ACTIVE | MESH_PATH_RESOLVING)) ||
- time_after(jiffies, mpath->exp_time - 1*HZ)) &&
+ (time_after(jiffies, mpath->last_preq_to_root +
+ root_path_confirmation_jiffies(sdata)) ||
+ time_before(jiffies, mpath->last_preq_to_root))) &&
!(mpath->flags & MESH_PATH_FIXED)) {
mhwmp_dbg("%s time to refresh root mpath %pM", sdata->name,
orig_addr);
mesh_queue_preq(mpath, PREQ_Q_F_START | PREQ_Q_F_REFRESH);
+ mpath->last_preq_to_root = jiffies;
}
if ((SN_LT(mpath->sn, orig_sn) || (mpath->sn == orig_sn &&