From 50f32718e125c3be5b0528bfa3868e88d677d8ce Mon Sep 17 00:00:00 2001
From: Haim Dreyfuss <haim.dreyfuss@intel.com>
Date: Fri, 20 Apr 2018 13:49:26 +0300
Subject: [PATCH] nl80211: Add wmm rule attribute to NL80211_CMD_GET_WIPHY dump command
Git-commit: 50f32718e125c3be5b0528bfa3868e88d677d8ce
Patch-mainline: v4.18-rc1
References: FATE#326294
This will serve userspace entity to maintain its regulatory limitation.
More specifcally APs can use this data to calculate the WMM IE when
Building: beacons, probe responses, assoc responses etc...
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
include/uapi/linux/nl80211.h | 28 ++++++++++++++++++
net/wireless/nl80211.c | 57 +++++++++++++++++++++++++++++++++---
2 files changed, 81 insertions(+), 4 deletions(-)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 15daf5e2638d..04c9b97aa5fc 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -11,6 +11,7 @@
* Copyright 2008 Jouni Malinen <jouni.malinen@atheros.com>
* Copyright 2008 Colin McCabe <colin@cozybit.com>
* Copyright 2015-2017 Intel Deutschland GmbH
+ * Copyright (C) 2018 Intel Corporation
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -3141,6 +3142,29 @@ enum nl80211_band_attr {
#define NL80211_BAND_ATTR_HT_CAPA NL80211_BAND_ATTR_HT_CAPA
+/**
+ * enum nl80211_wmm_rule - regulatory wmm rule
+ *
+ * @__NL80211_WMMR_INVALID: attribute number 0 is reserved
+ * @NL80211_WMMR_CW_MIN: Minimum contention window slot.
+ * @NL80211_WMMR_CW_MAX: Maximum contention window slot.
+ * @NL80211_WMMR_AIFSN: Arbitration Inter Frame Space.
+ * @NL80211_WMMR_TXOP: Maximum allowed tx operation time.
+ * @nl80211_WMMR_MAX: highest possible wmm rule.
+ * @__NL80211_WMMR_LAST: Internal use.
+ */
+enum nl80211_wmm_rule {
+ __NL80211_WMMR_INVALID,
+ NL80211_WMMR_CW_MIN,
+ NL80211_WMMR_CW_MAX,
+ NL80211_WMMR_AIFSN,
+ NL80211_WMMR_TXOP,
+
+ /* keep last */
+ __NL80211_WMMR_LAST,
+ NL80211_WMMR_MAX = __NL80211_WMMR_LAST - 1
+};
+
/**
* enum nl80211_frequency_attr - frequency attributes
* @__NL80211_FREQUENCY_ATTR_INVALID: attribute number 0 is reserved
@@ -3190,6 +3214,9 @@ enum nl80211_band_attr {
* on this channel in current regulatory domain.
* @NL80211_FREQUENCY_ATTR_NO_10MHZ: 10 MHz operation is not allowed
* on this channel in current regulatory domain.
+ * @NL80211_FREQUENCY_ATTR_WMM: this channel has wmm limitations.
+ * This is a nested attribute that contains the wmm limitation per AC.
+ * (see &enum nl80211_wmm_rule)
* @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
* currently defined
* @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
@@ -3218,6 +3245,7 @@ enum nl80211_frequency_attr {
NL80211_FREQUENCY_ATTR_IR_CONCURRENT,
NL80211_FREQUENCY_ATTR_NO_20MHZ,
NL80211_FREQUENCY_ATTR_NO_10MHZ,
+ NL80211_FREQUENCY_ATTR_WMM,
/* keep last */
__NL80211_FREQUENCY_ATTR_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index ff28f8feeb09..016d0a1de576 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -4,6 +4,7 @@
* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright 2015-2017 Intel Deutschland GmbH
+ * Copyright (C) 2018 Intel Corporation
*/
#include <linux/if.h>
@@ -645,7 +646,43 @@ static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
}
-static int nl80211_msg_put_channel(struct sk_buff *msg,
+static int nl80211_msg_put_wmm_rules(struct sk_buff *msg,
+ const struct ieee80211_reg_rule *rule)
+{
+ int j;
+ struct nlattr *nl_wmm_rules =
+ nla_nest_start(msg, NL80211_FREQUENCY_ATTR_WMM);
+
+ if (!nl_wmm_rules)
+ goto nla_put_failure;
+
+ for (j = 0; j < IEEE80211_NUM_ACS; j++) {
+ struct nlattr *nl_wmm_rule = nla_nest_start(msg, j);
+
+ if (!nl_wmm_rule)
+ goto nla_put_failure;
+
+ if (nla_put_u16(msg, NL80211_WMMR_CW_MIN,
+ rule->wmm_rule->client[j].cw_min) ||
+ nla_put_u16(msg, NL80211_WMMR_CW_MAX,
+ rule->wmm_rule->client[j].cw_max) ||
+ nla_put_u8(msg, NL80211_WMMR_AIFSN,
+ rule->wmm_rule->client[j].aifsn) ||
+ nla_put_u8(msg, NL80211_WMMR_TXOP,
+ rule->wmm_rule->client[j].cot))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, nl_wmm_rule);
+ }
+ nla_nest_end(msg, nl_wmm_rules);
+
+ return 0;
+
+nla_put_failure:
+ return -ENOBUFS;
+}
+
+static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy,
struct ieee80211_channel *chan,
bool large)
{
@@ -721,6 +758,16 @@ static int nl80211_msg_put_channel(struct sk_buff *msg,
DBM_TO_MBM(chan->max_power)))
goto nla_put_failure;
+ if (large) {
+ const struct ieee80211_reg_rule *rule =
+ freq_reg_info(wiphy, chan->center_freq);
+
+ if (!IS_ERR(rule) && rule->wmm_rule) {
+ if (nl80211_msg_put_wmm_rules(msg, rule))
+ goto nla_put_failure;
+ }
+ }
+
return 0;
nla_put_failure:
@@ -1631,7 +1678,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
chan = &sband->channels[i];
if (nl80211_msg_put_channel(
- msg, chan,
+ msg, &rdev->wiphy, chan,
state->split))
goto nla_put_failure;
@@ -14320,7 +14367,8 @@ void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
if (!nl_freq)
goto nla_put_failure;
- if (nl80211_msg_put_channel(msg, channel_before, false))
+
+ if (nl80211_msg_put_channel(msg, wiphy, channel_before, false))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
@@ -14328,7 +14376,8 @@ void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
if (!nl_freq)
goto nla_put_failure;
- if (nl80211_msg_put_channel(msg, channel_after, false))
+
+ if (nl80211_msg_put_channel(msg, wiphy, channel_after, false))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
--
2.19.2