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-rw-r--r--include/linux/skbuff.h9
-rw-r--r--include/net/cfg80211.h4
-rw-r--r--include/net/mac80211.h16
-rw-r--r--net/mac80211/cfg.c1
-rw-r--r--net/mac80211/debugfs_sta.c6
-rw-r--r--net/mac80211/ibss.c1
-rw-r--r--net/mac80211/ieee80211_i.h5
-rw-r--r--net/mac80211/mesh.c85
-rw-r--r--net/mac80211/mesh_plink.c3
-rw-r--r--net/mac80211/mlme.c1
-rw-r--r--net/mac80211/rate.c3
-rw-r--r--net/mac80211/spectmgmt.c7
-rw-r--r--net/mac80211/sta_info.c30
-rw-r--r--net/mac80211/sta_info.h11
-rw-r--r--net/mac80211/status.c4
-rw-r--r--net/mac80211/tx.c9
-rw-r--r--net/mac80211/util.c37
-rw-r--r--net/wireless/mesh.c8
-rw-r--r--net/wireless/nl80211.c17
-rw-r--r--net/wireless/util.c11
20 files changed, 247 insertions, 21 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index d460a4cbda1c..0873c2f9a9c1 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1889,6 +1889,15 @@ static inline unsigned char *__skb_put(struct sk_buff *skb, unsigned int len)
return tmp;
}
+static inline unsigned char *skb_put_zero(struct sk_buff *skb, unsigned int len)
+{
+ unsigned char *tmp = skb_put(skb, len);
+
+ memset(tmp, 0, len);
+
+ return tmp;
+}
+
unsigned char *skb_push(struct sk_buff *skb, unsigned int len);
static inline unsigned char *__skb_push(struct sk_buff *skb, unsigned int len)
{
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index b083e6cbae8c..fa25fbb67cb6 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1441,6 +1441,9 @@ struct mesh_config {
* @mcast_rate: multicat rate for Mesh Node [6Mbps is the default for 802.11a]
* @basic_rates: basic rates to use when creating the mesh
* @beacon_rate: bitrate to be used for beacons
+ * @userspace_handles_dfs: whether user space controls DFS operation, i.e.
+ * changes the channel when a radar is detected. This is required
+ * to operate on DFS channels.
*
* These parameters are fixed when the mesh is created.
*/
@@ -1462,6 +1465,7 @@ struct mesh_setup {
int mcast_rate[NUM_NL80211_BANDS];
u32 basic_rates;
struct cfg80211_bitrate_mask beacon_rate;
+ bool userspace_handles_dfs;
};
/**
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 76ed24a201eb..e01daff1e255 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -4205,6 +4205,22 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
int max_rates);
/**
+ * ieee80211_sta_set_expected_throughput - set the expected tpt for a station
+ *
+ * Call this function to notify mac80211 about a change in expected throughput
+ * to a station. A driver for a device that does rate control in firmware can
+ * call this function when the expected throughput estimate towards a station
+ * changes. The information is used to tune the CoDel AQM applied to traffic
+ * going towards that station (which can otherwise be too aggressive and cause
+ * slow stations to starve).
+ *
+ * @pubsta: the station to set throughput for.
+ * @thr: the current expected throughput in kbps.
+ */
+void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
+ u32 thr);
+
+/**
* ieee80211_tx_status - transmit status callback
*
* Call this function for all transmitted frames after they have been
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/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 42601820db20..b15412c21ac9 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -154,6 +154,12 @@ static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
p += scnprintf(p,
bufsz+buf-p,
+ "target %uus interval %uus ecn %s\n",
+ codel_time_to_us(sta->cparams.target),
+ codel_time_to_us(sta->cparams.interval),
+ sta->cparams.ecn ? "yes" : "no");
+ p += scnprintf(p,
+ bufsz+buf-p,
"tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 364d4e137649..660ac6a426f4 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -808,7 +808,6 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
}
memset(&params, 0, sizeof(params));
- memset(&csa_ie, 0, sizeof(csa_ie));
err = ieee80211_parse_ch_switch_ie(sdata, elems,
ifibss->chandef.chan->band,
sta_flags, ifibss->bssid, &csa_ie);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 665501ac358f..f24f1d7b8937 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 */
@@ -1432,6 +1434,7 @@ struct ieee80211_csa_ie {
u8 count;
u8 ttl;
u16 pre_value;
+ u16 reason_code;
};
/* Parsed Information Elements */
@@ -2057,6 +2060,8 @@ u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
const struct cfg80211_chan_def *chandef,
u16 prot_mode, bool rifs_mode);
+void ieee80211_ie_build_wide_bw_cs(u8 *pos,
+ const struct cfg80211_chan_def *chandef);
u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
u32 cap);
u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 737e1f082b0d..ad5d1cf39190 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -690,6 +690,9 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
2 + sizeof(struct ieee80211_channel_sw_ie) +
/* Mesh Channel Switch Parameters */
2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
+ /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
+ 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
+ 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
2 + 8 + /* supported rates */
2 + 3; /* DS params */
tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
@@ -736,8 +739,12 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
rcu_read_lock();
csa = rcu_dereference(ifmsh->csa);
if (csa) {
- pos = skb_put(skb, 13);
- memset(pos, 0, 13);
+ enum nl80211_channel_type ct;
+ struct cfg80211_chan_def *chandef;
+ int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
+ 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
+
+ pos = skb_put_zero(skb, ie_len);
*pos++ = WLAN_EID_CHANNEL_SWITCH;
*pos++ = 3;
*pos++ = 0x0;
@@ -760,6 +767,37 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
pos += 2;
put_unaligned_le16(ifmsh->pre_value, pos);
pos += 2;
+
+ switch (csa->settings.chandef.width) {
+ case NL80211_CHAN_WIDTH_40:
+ ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
+ pos = skb_put_zero(skb, ie_len);
+
+ *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
+ *pos++ = 1; /* len */
+ ct = cfg80211_get_chandef_type(&csa->settings.chandef);
+ if (ct == NL80211_CHAN_HT40PLUS)
+ *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+ else
+ *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+ break;
+ case NL80211_CHAN_WIDTH_80:
+ case NL80211_CHAN_WIDTH_80P80:
+ case NL80211_CHAN_WIDTH_160:
+ /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
+ ie_len = 2 + 2 +
+ sizeof(struct ieee80211_wide_bw_chansw_ie);
+ pos = skb_put_zero(skb, ie_len);
+
+ *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
+ *pos++ = 5; /* len */
+ /* put sub IE */
+ chandef = &csa->settings.chandef;
+ ieee80211_ie_build_wide_bw_cs(pos, chandef);
+ break;
+ default:
+ break;
+ }
}
rcu_read_unlock();
@@ -916,6 +954,21 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
ieee80211_configure_filter(local);
}
+static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
+{
+ int err;
+
+ /* if the current channel is a DFS channel, mark the channel as
+ * unavailable.
+ */
+ err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
+ &sdata->vif.bss_conf.chandef,
+ NL80211_IFTYPE_MESH_POINT);
+ if (err > 0)
+ cfg80211_radar_event(sdata->local->hw.wiphy,
+ &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
+}
+
static bool
ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems, bool beacon)
@@ -933,19 +986,20 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
if (!sband)
return false;
- sta_flags = IEEE80211_STA_DISABLE_VHT;
+ sta_flags = 0;
switch (sdata->vif.bss_conf.chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
sta_flags |= IEEE80211_STA_DISABLE_HT;
case NL80211_CHAN_WIDTH_20:
sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
+ case NL80211_CHAN_WIDTH_40:
+ sta_flags |= IEEE80211_STA_DISABLE_VHT;
break;
default:
break;
}
memset(&params, 0, sizeof(params));
- memset(&csa_ie, 0, sizeof(csa_ie));
err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
sta_flags, sdata->vif.addr,
&csa_ie);
@@ -954,11 +1008,19 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
if (err)
return false;
+ /* Mark the channel unavailable if the reason for the switch is
+ * regulatory.
+ */
+ if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
+ ieee80211_mesh_csa_mark_radar(sdata);
+
params.chandef = csa_ie.chandef;
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,
@@ -974,9 +1036,16 @@ 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;
@@ -1233,7 +1302,7 @@ static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
pos = mgmt->u.action.u.chan_switch.variable;
baselen = offsetof(struct ieee80211_mgmt,
u.action.u.chan_switch.variable);
- ieee802_11_parse_elems(pos, len - baselen, false, &elems);
+ ieee802_11_parse_elems(pos, len - baselen, true, &elems);
ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
if (!--ifmsh->chsw_ttl)
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 1131cd504a15..82cfd232a25e 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -264,8 +264,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
band = sband->band;
/* capability info */
- pos = skb_put(skb, 2);
- memset(pos, 0, 2);
+ pos = skb_put_zero(skb, 2);
if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
/* AID */
pos = skb_put(skb, 2);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 0ea9712bd99e..1ae9be090309 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1126,7 +1126,6 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
return;
current_band = cbss->channel->band;
- memset(&csa_ie, 0, sizeof(csa_ie));
res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
ifmgd->flags,
ifmgd->associated->bssid, &csa_ie);
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index ea1f4315c521..76f303fda3ed 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -943,6 +943,8 @@ int rate_control_set_rates(struct ieee80211_hw *hw,
drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
+ ieee80211_sta_set_expected_throughput(pubsta, sta_get_expected_throughput(sta));
+
return 0;
}
EXPORT_SYMBOL(rate_control_set_rates);
@@ -991,4 +993,3 @@ void rate_control_deinitialize(struct ieee80211_local *local)
local->rate_ctrl = NULL;
rate_control_free(local, ref);
}
-
diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c
index 0782e486fe89..bf8f5dcea1c4 100644
--- a/net/mac80211/spectmgmt.c
+++ b/net/mac80211/spectmgmt.c
@@ -36,6 +36,8 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
int secondary_channel_offset = -1;
+ memset(csa_ie, 0, sizeof(*csa_ie));
+
sec_chan_offs = elems->sec_chan_offs;
wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
@@ -76,6 +78,11 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
csa_ie->mode = elems->mesh_chansw_params_ie->mesh_flags;
csa_ie->pre_value = le16_to_cpu(
elems->mesh_chansw_params_ie->mesh_pre_value);
+
+ if (elems->mesh_chansw_params_ie->mesh_flags &
+ WLAN_EID_CHAN_SWITCH_PARAM_REASON)
+ csa_ie->reason_code = le16_to_cpu(
+ elems->mesh_chansw_params_ie->mesh_reason);
}
new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 403e3cc58b57..46e1809356f6 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -20,6 +20,7 @@
#include <linux/timer.h>
#include <linux/rtnetlink.h>
+#include <net/codel.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
@@ -425,6 +426,11 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
+ sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
+ sta->cparams.target = MS2TIME(20);
+ sta->cparams.interval = MS2TIME(100);
+ sta->cparams.ecn = true;
+
sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
return sta;
@@ -2310,3 +2316,27 @@ unsigned long ieee80211_sta_last_active(struct sta_info *sta)
return stats->last_rx;
return sta->status_stats.last_ack;
}
+
+static void sta_update_codel_params(struct sta_info *sta, u32 thr)
+{
+ if (!sta->sdata->local->ops->wake_tx_queue)
+ return;
+
+ if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
+ sta->cparams.target = MS2TIME(50);
+ sta->cparams.interval = MS2TIME(300);
+ sta->cparams.ecn = false;
+ } else {
+ sta->cparams.target = MS2TIME(20);
+ sta->cparams.interval = MS2TIME(100);
+ sta->cparams.ecn = true;
+ }
+}
+
+void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
+ u32 thr)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+ sta_update_codel_params(sta, thr);
+}
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index ea0747d6a6da..cde89c6d0386 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -396,6 +396,14 @@ struct ieee80211_sta_rx_stats {
};
/**
+ * The bandwidth threshold below which the per-station CoDel parameters will be
+ * scaled to be more lenient (to prevent starvation of slow stations). This
+ * value will be scaled by the number of active stations when it is being
+ * applied.
+ */
+#define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
+
+/**
* struct sta_info - STA information
*
* This structure collects information about a station that
@@ -448,6 +456,7 @@ struct ieee80211_sta_rx_stats {
* @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
* AP only.
* @cipher_scheme: optional cipher scheme for this station
+ * @cparams: CoDel parameters for this station.
* @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
* @fast_tx: TX fastpath information
* @fast_rx: RX fastpath information
@@ -551,6 +560,8 @@ struct sta_info {
enum ieee80211_smps_mode known_smps_mode;
const struct ieee80211_cipher_scheme *cipher_scheme;
+ struct codel_params cparams;
+
u8 reserved_tid;
struct cfg80211_chan_def tdls_chandef;
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index be47ac5cd8c8..a9fa6ee57e8f 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -546,6 +546,8 @@ static void ieee80211_report_used_skb(struct ieee80211_local *local,
skb->wifi_acked_valid = 1;
skb->wifi_acked = acked;
}
+
+ ieee80211_led_tx(local);
}
/*
@@ -823,8 +825,6 @@ static void __ieee80211_tx_status(struct ieee80211_hw *hw,
}
}
- ieee80211_led_tx(local);
-
/* SNMP counters
* Fragments are passed to low-level drivers as separate skbs, so these
* are actually fragments, not frames. Update frame counters only for
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 04b22f8982fe..b8dc41191835 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1340,9 +1340,16 @@ static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
local = container_of(fq, struct ieee80211_local, fq);
txqi = container_of(tin, struct txq_info, tin);
- cparams = &local->cparams;
cstats = &txqi->cstats;
+ if (txqi->txq.sta) {
+ struct sta_info *sta = container_of(txqi->txq.sta,
+ struct sta_info, sta);
+ cparams = &sta->cparams;
+ } else {
+ cparams = &local->cparams;
+ }
+
if (flow == &txqi->def_flow)
cvars = &txqi->def_cvars;
else
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ac9ac6c35594..de0f1cdb64d4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2414,6 +2414,35 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
return pos + sizeof(struct ieee80211_ht_operation);
}
+void ieee80211_ie_build_wide_bw_cs(u8 *pos,
+ const struct cfg80211_chan_def *chandef)
+{
+ *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
+ *pos++ = 3; /* IE length */
+ /* New channel width */
+ switch (chandef->width) {
+ case NL80211_CHAN_WIDTH_80:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_160:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_80P80:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
+ break;
+ default:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
+ }
+
+ /* new center frequency segment 0 */
+ *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
+ /* new center frequency segment 1 */
+ if (chandef->center_freq2)
+ *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
+ else
+ *pos++ = 0;
+}
+
u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
const struct cfg80211_chan_def *chandef)
{
@@ -2964,6 +2993,7 @@ int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
skb = dev_alloc_skb(local->tx_headroom + hdr_len +
5 + /* channel switch announcement element */
3 + /* secondary channel offset element */
+ 5 + /* wide bandwidth channel switch announcement */
8); /* mesh channel switch parameters element */
if (!skb)
return -ENOMEM;
@@ -3022,6 +3052,13 @@ int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
pos += 2;
}
+ if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
+ csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
+ csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
+ skb_put(skb, 5);
+ ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
+ }
+
ieee80211_tx_skb(sdata, skb);
return 0;
}
diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index ec0b1c20ac99..421a6b80ec62 100644
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -174,6 +174,14 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
scan_width);
}
+ err = cfg80211_chandef_dfs_required(&rdev->wiphy,
+ &setup->chandef,
+ NL80211_IFTYPE_MESH_POINT);
+ if (err < 0)
+ return err;
+ if (err > 0 && !setup->userspace_handles_dfs)
+ return -EINVAL;
+
if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef,
NL80211_IFTYPE_MESH_POINT))
return -EINVAL;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c3bc9da30cff..9eb59196a378 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7501,6 +7501,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
int err;
bool need_new_beacon = false;
+ bool need_handle_dfs_flag = true;
int len, i;
u32 cs_count;
@@ -7512,6 +7513,12 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
need_new_beacon = true;
+ /* For all modes except AP the handle_dfs flag needs to be
+ * supplied to tell the kernel that userspace will handle radar
+ * events when they happen. Otherwise a switch to a channel
+ * requiring DFS will be rejected.
+ */
+ need_handle_dfs_flag = false;
/* useless if AP is not running */
if (!wdev->beacon_interval)
@@ -7634,8 +7641,13 @@ skip_beacons:
if (err < 0)
return err;
- if (err > 0)
+ if (err > 0) {
params.radar_required = true;
+ if (need_handle_dfs_flag &&
+ !nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS])) {
+ return -EINVAL;
+ }
+ }
if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
params.block_tx = true;
@@ -9962,6 +9974,9 @@ static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
return err;
}
+ setup.userspace_handles_dfs =
+ nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
+
return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
}
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 4992f1025c9d..96613fe2c6b1 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1219,8 +1219,8 @@ static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
u32 bitrate;
int idx;
- if (WARN_ON_ONCE(rate->mcs > 9))
- return 0;
+ if (rate->mcs > 9)
+ goto warn;
switch (rate->bw) {
case RATE_INFO_BW_160:
@@ -1235,8 +1235,7 @@ static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
case RATE_INFO_BW_5:
case RATE_INFO_BW_10:
default:
- WARN_ON(1);
- /* fall through */
+ goto warn;
case RATE_INFO_BW_20:
idx = 0;
}
@@ -1249,6 +1248,10 @@ static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
/* do NOT round down here */
return (bitrate + 50000) / 100000;
+ warn:
+ WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
+ rate->bw, rate->mcs, rate->nss);
+ return 0;
}
u32 cfg80211_calculate_bitrate(struct rate_info *rate)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.