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authorBenjamin Berg <benjamin@sipsolutions.net>2017-05-16 11:23:13 +0200
committerJohannes Berg <johannes.berg@intel.com>2017-05-19 13:26:05 +0200
commit0ab2e55d33346972297972dd6bb4623159a1b239 (patch)
tree8e8c3aba76b625bff9f61a590f95ca15632a51b8
parent8d9de16f80d35f12198496640c4f09d35fd77715 (diff)
mac80211: mesh: Allow following CSA to DFS channels if userspace handles it
If userspace has flagged support for DFS earlier, then we can follow CSA to DFS channels. So instead of rejecting the switch, allow it to happen if the flag has been set during mesh setup. Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
-rw-r--r--net/mac80211/cfg.c1
-rw-r--r--net/mac80211/ieee80211_i.h2
-rw-r--r--net/mac80211/mesh.c15
3 files changed, 15 insertions, 3 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 6c2e6060cd54..6980a936a437 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1874,6 +1874,7 @@ static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
ifmsh->user_mpm = setup->user_mpm;
ifmsh->mesh_auth_id = setup->auth_id;
ifmsh->security = IEEE80211_MESH_SEC_NONE;
+ ifmsh->userspace_handles_dfs = setup->userspace_handles_dfs;
if (setup->is_authenticated)
ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
if (setup->is_secure)
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 60bed6c69801..c960e4999380 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -643,6 +643,8 @@ struct ieee80211_if_mesh {
unsigned long wrkq_flags;
unsigned long mbss_changed;
+ bool userspace_handles_dfs;
+
u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
size_t mesh_id_len;
/* Active Path Selection Protocol Identifier */
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index f7dffdf5fc74..7e0498bb9337 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -978,7 +978,9 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
params.count = csa_ie.count;
if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, &params.chandef,
- IEEE80211_CHAN_DISABLED)) {
+ IEEE80211_CHAN_DISABLED) ||
+ !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, &params.chandef,
+ NL80211_IFTYPE_MESH_POINT)) {
sdata_info(sdata,
"mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
sdata->vif.addr,
@@ -994,9 +996,16 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
NL80211_IFTYPE_MESH_POINT);
if (err < 0)
return false;
- if (err > 0)
- /* TODO: DFS not (yet) supported */
+ if (err > 0 && !ifmsh->userspace_handles_dfs) {
+ sdata_info(sdata,
+ "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
+ sdata->vif.addr,
+ params.chandef.chan->center_freq,
+ params.chandef.width,
+ params.chandef.center_freq1,
+ params.chandef.center_freq2);
return false;
+ }
params.radar_required = err;