[PATCH 00/14] cfg80211/mac80211 patches from our internal tree 2023-12-10

[PATCH 00/14] cfg80211/mac80211 patches from our internal tree 2023-12-10

[Miri Korenblit]

Hi,

A bunch of patches from our internal tree with mac80211 and
cfg80211 changes. It's the usual developement, adding a few small
features, bugfixes, and cleanups.

Thanks,
Miri

Andrei Otcheretianski (2):
  wifi: mac80211: Replace ENOTSUPP with EOPNOTSUPP
  wifi: cfg80211: Replace ENOTSUPP with EOPNOTSUPP

Benjamin Berg (2):
  wifi: cfg80211: generate an ML element for per-STA profiles
  wifi: cfg80211: consume both probe response and beacon IEs

Ilan Peer (2):
  wifi: cfg80211: Add support for setting TID to link mapping
  wifi: cfg80211: Update the default DSCP-to-UP mapping

Johannes Berg (8):
  wifi: mac80211: don't re-add debugfs during reconfig
  wifi: cfg80211: add BSS usage reporting
  wifi: mac80211: update some locking documentation
  wifi: mac80211: add a flag to disallow puncturing
  wifi: mac80211: don't set ESS capab bit in assoc request
  wifi: mac80211: check defragmentation succeeded
  wifi: mac80211: mesh_plink: fix matches_local logic
  wifi: mac80211: mesh: check element parsing succeeded

 include/net/cfg80211.h       |  78 ++++++++++++++++++++++---
 include/net/mac80211.h       |  23 ++++----
 include/uapi/linux/nl80211.h |  59 +++++++++++++++++++
 net/mac80211/cfg.c           |   4 +-
 net/mac80211/chan.c          |   4 +-
 net/mac80211/debugfs.c       |   1 +
 net/mac80211/driver-ops.c    |   6 +-
 net/mac80211/driver-ops.h    |   2 +-
 net/mac80211/mesh_hwmp.c     |   2 +-
 net/mac80211/mesh_pathtbl.c  |   8 +--
 net/mac80211/mesh_plink.c    |  16 +++---
 net/mac80211/mlme.c          |  29 ++++++++--
 net/mac80211/scan.c          |   4 +-
 net/mac80211/tdls.c          |  18 +++---
 net/wireless/core.h          |   3 +
 net/wireless/nl80211.c       |  95 ++++++++++++++++++++++++++----
 net/wireless/rdev-ops.h      |  26 +++++++--
 net/wireless/scan.c          | 108 +++++++++++++++++++++++++++++------
 net/wireless/trace.h         |  20 +++++++
 net/wireless/util.c          |  46 +++++++++++++++
 20 files changed, 467 insertions(+), 85 deletions(-)

-- 
2.34.1

[PATCH 01/14] wifi: mac80211: don't re-add debugfs during reconfig

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

If we're doing reconfig, then we cannot add the debugfs
files that are already there from before the reconfig.
Skip that in drv_change_sta_links() during reconfig.

Fixes: d2caad527c19 ("wifi: mac80211: add API to show the link STAs in debugfs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Reviewed-by: Berg, Benjamin <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/driver-ops.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index 7938ec87ef25..d3820333cd59 100644
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2015 Intel Deutschland GmbH
- * Copyright (C) 2022 Intel Corporation
+ * Copyright (C) 2022-2023 Intel Corporation
  */
 #include <net/mac80211.h>
 #include "ieee80211_i.h"
@@ -589,6 +589,10 @@ int drv_change_sta_links(struct ieee80211_local *local,
 	if (ret)
 		return ret;
 
+	/* during reconfig don't add it to debugfs again */
+	if (local->in_reconfig)
+		return 0;
+
 	for_each_set_bit(link_id, &links_to_add, IEEE80211_MLD_MAX_NUM_LINKS) {
 		link_sta = rcu_dereference_protected(info->link[link_id],
 						     lockdep_is_held(&local->hw.wiphy->mtx));
-- 
2.34.1

[PATCH 02/14] wifi: cfg80211: add BSS usage reporting

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

Sometimes there may be reasons for which a BSS that's
actually found in scan cannot be used to connect to,
for example a nonprimary link of an NSTR mobile AP MLD
cannot be used for normal direct connections to it.

Not indicating these to userspace as we do now of course
avoids being able to connect to them, but it's better if
they're shown to userspace and it can make an appropriate
decision, without e.g. doing an additional ML probe.

Thus add an indication of what a BSS can be used for,
currently "normal" and "MLD link", including a reason
bitmap for it being not usable.

The latter can be extended later for certain BSSes if there
are other reasons they cannot be used.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Peer, Ilan <ilan.peer@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 include/net/cfg80211.h       | 60 +++++++++++++++++++++++++----
 include/uapi/linux/nl80211.h | 40 ++++++++++++++++++++
 net/wireless/core.h          |  3 ++
 net/wireless/nl80211.c       | 54 +++++++++++++++++++++-----
 net/wireless/scan.c          | 73 +++++++++++++++++++++++++++---------
 5 files changed, 195 insertions(+), 35 deletions(-)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index d59669d86718..c0d16fbf4aba 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2819,6 +2819,13 @@ enum cfg80211_signal_type {
  *	the BSS that requested the scan in which the beacon/probe was received.
  * @chains: bitmask for filled values in @chain_signal.
  * @chain_signal: per-chain signal strength of last received BSS in dBm.
+ * @restrict_use: restrict usage, if not set, assume @use_for is
+ *	%NL80211_BSS_USE_FOR_NORMAL.
+ * @use_for: bitmap of possible usage for this BSS, see
+ *	&enum nl80211_bss_use_for
+ * @cannot_use_reasons: the reasons (bitmap) for not being able to connect,
+ *	if @restrict_use is set and @use_for is zero (empty); may be 0 for
+ *	unspecified reasons; see &enum nl80211_bss_cannot_use_reasons
  * @drv_data: Data to be passed through to @inform_bss
  */
 struct cfg80211_inform_bss {
@@ -2830,6 +2837,9 @@ struct cfg80211_inform_bss {
 	u8 chains;
 	s8 chain_signal[IEEE80211_MAX_CHAINS];
 
+	u8 restrict_use:1, use_for:7;
+	u8 cannot_use_reasons;
+
 	void *drv_data;
 };
 
@@ -2881,6 +2891,11 @@ struct cfg80211_bss_ies {
  * @chain_signal: per-chain signal strength of last received BSS in dBm.
  * @bssid_index: index in the multiple BSS set
  * @max_bssid_indicator: max number of members in the BSS set
+ * @use_for: bitmap of possible usage for this BSS, see
+ *	&enum nl80211_bss_use_for
+ * @cannot_use_reasons: the reasons (bitmap) for not being able to connect,
+ *	if @restrict_use is set and @use_for is zero (empty); may be 0 for
+ *	unspecified reasons; see &enum nl80211_bss_cannot_use_reasons
  * @priv: private area for driver use, has at least wiphy->bss_priv_size bytes
  */
 struct cfg80211_bss {
@@ -2906,6 +2921,9 @@ struct cfg80211_bss {
 	u8 bssid_index;
 	u8 max_bssid_indicator;
 
+	u8 use_for;
+	u8 cannot_use_reasons;
+
 	u8 priv[] __aligned(sizeof(void *));
 };
 
@@ -4913,6 +4931,8 @@ struct cfg80211_ops {
  *	NL80211_REGDOM_SET_BY_DRIVER.
  * @WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON: reg_call_notifier() is called if driver
  *	set this flag to update channels on beacon hints.
+ * @WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY: support connection to non-primary link
+ *	of an NSTR mobile AP MLD.
  */
 enum wiphy_flags {
 	WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK		= BIT(0),
@@ -4926,7 +4946,7 @@ enum wiphy_flags {
 	WIPHY_FLAG_IBSS_RSN			= BIT(8),
 	WIPHY_FLAG_MESH_AUTH			= BIT(10),
 	WIPHY_FLAG_SUPPORTS_EXT_KCK_32          = BIT(11),
-	/* use hole at 12 */
+	WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY	= BIT(12),
 	WIPHY_FLAG_SUPPORTS_FW_ROAM		= BIT(13),
 	WIPHY_FLAG_AP_UAPSD			= BIT(14),
 	WIPHY_FLAG_SUPPORTS_TDLS		= BIT(15),
@@ -7164,6 +7184,25 @@ cfg80211_inform_bss(struct wiphy *wiphy,
 					gfp);
 }
 
+/**
+ * __cfg80211_get_bss - get a BSS reference
+ * @wiphy: the wiphy this BSS struct belongs to
+ * @channel: the channel to search on (or %NULL)
+ * @bssid: the desired BSSID (or %NULL)
+ * @ssid: the desired SSID (or %NULL)
+ * @ssid_len: length of the SSID (or 0)
+ * @bss_type: type of BSS, see &enum ieee80211_bss_type
+ * @privacy: privacy filter, see &enum ieee80211_privacy
+ * @use_for: indicates which use is intended
+ */
+struct cfg80211_bss *__cfg80211_get_bss(struct wiphy *wiphy,
+					struct ieee80211_channel *channel,
+					const u8 *bssid,
+					const u8 *ssid, size_t ssid_len,
+					enum ieee80211_bss_type bss_type,
+					enum ieee80211_privacy privacy,
+					u32 use_for);
+
 /**
  * cfg80211_get_bss - get a BSS reference
  * @wiphy: the wiphy this BSS struct belongs to
@@ -7173,13 +7212,20 @@ cfg80211_inform_bss(struct wiphy *wiphy,
  * @ssid_len: length of the SSID (or 0)
  * @bss_type: type of BSS, see &enum ieee80211_bss_type
  * @privacy: privacy filter, see &enum ieee80211_privacy
+ *
+ * This version implies regular usage, %NL80211_BSS_USE_FOR_NORMAL.
  */
-struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
-				      struct ieee80211_channel *channel,
-				      const u8 *bssid,
-				      const u8 *ssid, size_t ssid_len,
-				      enum ieee80211_bss_type bss_type,
-				      enum ieee80211_privacy privacy);
+static inline struct cfg80211_bss *
+cfg80211_get_bss(struct wiphy *wiphy, struct ieee80211_channel *channel,
+		 const u8 *bssid, const u8 *ssid, size_t ssid_len,
+		 enum ieee80211_bss_type bss_type,
+		 enum ieee80211_privacy privacy)
+{
+	return __cfg80211_get_bss(wiphy, channel, bssid, ssid, ssid_len,
+				  bss_type, privacy,
+				  NL80211_BSS_USE_FOR_NORMAL);
+}
+
 static inline struct cfg80211_bss *
 cfg80211_get_ibss(struct wiphy *wiphy,
 		  struct ieee80211_channel *channel,
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 0cd1da2c2902..7d774f6b3454 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2830,6 +2830,10 @@ enum nl80211_commands {
  * @NL80211_ATTR_MLO_LINK_DISABLED: Flag attribute indicating that the link is
  *	disabled.
  *
+ * @NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA: Include BSS usage data, i.e.
+ *	include BSSes that can only be used in restricted scenarios and/or
+ *	cannot be used at all.
+ *
  * @NUM_NL80211_ATTR: total number of nl80211_attrs available
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3368,6 +3372,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_MLO_LINK_DISABLED,
 
+	NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -5031,6 +5037,30 @@ enum nl80211_bss_scan_width {
 	NL80211_BSS_CHAN_WIDTH_2,
 };
 
+/**
+ * enum nl80211_bss_use_for - bitmap indicating possible BSS use
+ * @NL80211_BSS_USE_FOR_NORMAL: Use this BSS for normal "connection",
+ *	including IBSS/MBSS depending on the type.
+ * @NL80211_BSS_USE_FOR_MLD_LINK: This BSS can be used as a link in an
+ *	MLO connection. Note that for an MLO connection, all links including
+ *	the assoc link must have this flag set, and the assoc link must
+ *	additionally have %NL80211_BSS_USE_FOR_NORMAL set.
+ */
+enum nl80211_bss_use_for {
+	NL80211_BSS_USE_FOR_NORMAL = 1 << 0,
+	NL80211_BSS_USE_FOR_MLD_LINK = 1 << 1,
+};
+
+/**
+ * enum nl80211_bss_cannot_use_reasons - reason(s) connection to a
+ *	BSS isn't possible
+ * @NL80211_BSS_CANNOT_USE_NSTR_NONPRIMARY: NSTR nonprimary links aren't
+ *	supported by the device, and this BSS entry represents one.
+ */
+enum nl80211_bss_cannot_use_reasons {
+	NL80211_BSS_CANNOT_USE_NSTR_NONPRIMARY	= 1 << 0,
+};
+
 /**
  * enum nl80211_bss - netlink attributes for a BSS
  *
@@ -5083,6 +5113,14 @@ enum nl80211_bss_scan_width {
  * @NL80211_BSS_FREQUENCY_OFFSET: frequency offset in KHz
  * @NL80211_BSS_MLO_LINK_ID: MLO link ID of the BSS (u8).
  * @NL80211_BSS_MLD_ADDR: MLD address of this BSS if connected to it.
+ * @NL80211_BSS_USE_FOR: u32 bitmap attribute indicating what the BSS can be
+ *	used for, see &enum nl80211_bss_use_for.
+ * @NL80211_BSS_CANNOT_USE_REASONS: Indicates the reason that this BSS cannot
+ *	be used for all or some of the possible uses by the device reporting it,
+ *	even though its presence was detected.
+ *	This is a u64 attribute containing a bitmap of values from
+ *	&enum nl80211_cannot_use_reasons, note that the attribute may be missing
+ *	if no reasons are specified.
  * @__NL80211_BSS_AFTER_LAST: internal
  * @NL80211_BSS_MAX: highest BSS attribute
  */
@@ -5110,6 +5148,8 @@ enum nl80211_bss {
 	NL80211_BSS_FREQUENCY_OFFSET,
 	NL80211_BSS_MLO_LINK_ID,
 	NL80211_BSS_MLD_ADDR,
+	NL80211_BSS_USE_FOR,
+	NL80211_BSS_CANNOT_USE_REASONS,
 
 	/* keep last */
 	__NL80211_BSS_AFTER_LAST,
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 4c692c7faf30..87c5889b15e3 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -457,6 +457,9 @@ int cfg80211_scan(struct cfg80211_registered_device *rdev);
 
 extern struct work_struct cfg80211_disconnect_work;
 
+#define NL80211_BSS_USE_FOR_ALL	(NL80211_BSS_USE_FOR_NORMAL | \
+				 NL80211_BSS_USE_FOR_MLD_LINK)
+
 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 			    const struct cfg80211_chan_def *chandef,
 			    enum nl80211_dfs_state dfs_state);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 403a4a38966a..7dec0027daaa 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -818,6 +818,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_HW_TIMESTAMP_ENABLED] = { .type = NLA_FLAG },
 	[NL80211_ATTR_EMA_RNR_ELEMS] = { .type = NLA_NESTED },
 	[NL80211_ATTR_MLO_LINK_DISABLED] = { .type = NLA_FLAG },
+	[NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA] = { .type = NLA_FLAG },
 };
 
 /* policy for the key attributes */
@@ -10405,6 +10406,15 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
 		break;
 	}
 
+	if (nla_put_u32(msg, NL80211_BSS_USE_FOR, res->use_for))
+		goto nla_put_failure;
+
+	if (res->cannot_use_reasons &&
+	    nla_put_u64_64bit(msg, NL80211_BSS_CANNOT_USE_REASONS,
+			      res->cannot_use_reasons,
+			      NL80211_BSS_PAD))
+		goto nla_put_failure;
+
 	nla_nest_end(msg, bss);
 
 	genlmsg_end(msg, hdr);
@@ -10422,15 +10432,27 @@ static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
 	struct cfg80211_registered_device *rdev;
 	struct cfg80211_internal_bss *scan;
 	struct wireless_dev *wdev;
+	struct nlattr **attrbuf;
 	int start = cb->args[2], idx = 0;
+	bool dump_include_use_data;
 	int err;
 
-	err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
-	if (err)
+	attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf), GFP_KERNEL);
+	if (!attrbuf)
+		return -ENOMEM;
+
+	err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, attrbuf);
+	if (err) {
+		kfree(attrbuf);
 		return err;
+	}
 	/* nl80211_prepare_wdev_dump acquired it in the successful case */
 	__acquire(&rdev->wiphy.mtx);
 
+	dump_include_use_data =
+		attrbuf[NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA];
+	kfree(attrbuf);
+
 	spin_lock_bh(&rdev->bss_lock);
 
 	/*
@@ -10447,6 +10469,9 @@ static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
 	list_for_each_entry(scan, &rdev->bss_list, list) {
 		if (++idx <= start)
 			continue;
+		if (!dump_include_use_data &&
+		    !(scan->pub.use_for & NL80211_BSS_USE_FOR_NORMAL))
+			continue;
 		if (nl80211_send_bss(skb, cb,
 				cb->nlh->nlmsg_seq, NLM_F_MULTI,
 				rdev, wdev, scan) < 0) {
@@ -10898,12 +10923,13 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
 
 static struct cfg80211_bss *nl80211_assoc_bss(struct cfg80211_registered_device *rdev,
 					      const u8 *ssid, int ssid_len,
-					      struct nlattr **attrs)
+					      struct nlattr **attrs,
+					      int assoc_link_id, int link_id)
 {
 	struct ieee80211_channel *chan;
 	struct cfg80211_bss *bss;
 	const u8 *bssid;
-	u32 freq;
+	u32 freq, use_for = 0;
 
 	if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_WIPHY_FREQ])
 		return ERR_PTR(-EINVAL);
@@ -10918,10 +10944,16 @@ static struct cfg80211_bss *nl80211_assoc_bss(struct cfg80211_registered_device
 	if (!chan)
 		return ERR_PTR(-EINVAL);
 
-	bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid,
-			       ssid, ssid_len,
-			       IEEE80211_BSS_TYPE_ESS,
-			       IEEE80211_PRIVACY_ANY);
+	if (assoc_link_id >= 0)
+		use_for = NL80211_BSS_USE_FOR_MLD_LINK;
+	if (assoc_link_id == link_id)
+		use_for |= NL80211_BSS_USE_FOR_NORMAL;
+
+	bss = __cfg80211_get_bss(&rdev->wiphy, chan, bssid,
+				 ssid, ssid_len,
+				 IEEE80211_BSS_TYPE_ESS,
+				 IEEE80211_PRIVACY_ANY,
+				 use_for);
 	if (!bss)
 		return ERR_PTR(-ENOENT);
 
@@ -11100,7 +11132,8 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
 				goto free;
 			}
 			req.links[link_id].bss =
-				nl80211_assoc_bss(rdev, ssid, ssid_len, attrs);
+				nl80211_assoc_bss(rdev, ssid, ssid_len, attrs,
+						  req.link_id, link_id);
 			if (IS_ERR(req.links[link_id].bss)) {
 				err = PTR_ERR(req.links[link_id].bss);
 				req.links[link_id].bss = NULL;
@@ -11165,7 +11198,8 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
 		if (req.link_id >= 0)
 			return -EINVAL;
 
-		req.bss = nl80211_assoc_bss(rdev, ssid, ssid_len, info->attrs);
+		req.bss = nl80211_assoc_bss(rdev, ssid, ssid_len, info->attrs,
+					    -1, -1);
 		if (IS_ERR(req.bss))
 			return PTR_ERR(req.bss);
 		ap_addr = req.bss->bssid;
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 9e5ccffd6868..2f8c9b6f7ebc 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1535,12 +1535,13 @@ static bool cfg80211_bss_type_match(u16 capability,
 }
 
 /* Returned bss is reference counted and must be cleaned up appropriately. */
-struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
-				      struct ieee80211_channel *channel,
-				      const u8 *bssid,
-				      const u8 *ssid, size_t ssid_len,
-				      enum ieee80211_bss_type bss_type,
-				      enum ieee80211_privacy privacy)
+struct cfg80211_bss *__cfg80211_get_bss(struct wiphy *wiphy,
+					struct ieee80211_channel *channel,
+					const u8 *bssid,
+					const u8 *ssid, size_t ssid_len,
+					enum ieee80211_bss_type bss_type,
+					enum ieee80211_privacy privacy,
+					u32 use_for)
 {
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 	struct cfg80211_internal_bss *bss, *res = NULL;
@@ -1565,6 +1566,8 @@ struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
 			continue;
 		if (!is_valid_ether_addr(bss->pub.bssid))
 			continue;
+		if ((bss->pub.use_for & use_for) != use_for)
+			continue;
 		/* Don't get expired BSS structs */
 		if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) &&
 		    !atomic_read(&bss->hold))
@@ -1582,7 +1585,7 @@ struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
 	trace_cfg80211_return_bss(&res->pub);
 	return &res->pub;
 }
-EXPORT_SYMBOL(cfg80211_get_bss);
+EXPORT_SYMBOL(__cfg80211_get_bss);
 
 static void rb_insert_bss(struct cfg80211_registered_device *rdev,
 			  struct cfg80211_internal_bss *bss)
@@ -1800,6 +1803,8 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev,
 	ether_addr_copy(known->parent_bssid, new->parent_bssid);
 	known->pub.max_bssid_indicator = new->pub.max_bssid_indicator;
 	known->pub.bssid_index = new->pub.bssid_index;
+	known->pub.use_for &= new->pub.use_for;
+	known->pub.cannot_use_reasons = new->pub.cannot_use_reasons;
 
 	return true;
 }
@@ -2044,6 +2049,9 @@ struct cfg80211_inform_single_bss_data {
 	struct cfg80211_bss *source_bss;
 	u8 max_bssid_indicator;
 	u8 bssid_index;
+
+	u8 use_for;
+	u64 cannot_use_reasons;
 };
 
 /* Returned bss is reference counted and must be cleaned up appropriately. */
@@ -2089,6 +2097,8 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
 	tmp.ts_boottime = drv_data->boottime_ns;
 	tmp.parent_tsf = drv_data->parent_tsf;
 	ether_addr_copy(tmp.parent_bssid, drv_data->parent_bssid);
+	tmp.pub.use_for = data->use_for;
+	tmp.pub.cannot_use_reasons = data->cannot_use_reasons;
 
 	if (data->bss_source != BSS_SOURCE_DIRECT) {
 		tmp.pub.transmitted_bss = data->source_bss;
@@ -2259,6 +2269,8 @@ cfg80211_parse_mbssid_data(struct wiphy *wiphy,
 		.beacon_interval = tx_data->beacon_interval,
 		.source_bss = source_bss,
 		.bss_source = BSS_SOURCE_MBSSID,
+		.use_for = tx_data->use_for,
+		.cannot_use_reasons = tx_data->cannot_use_reasons,
 	};
 	const u8 *mbssid_index_ie;
 	const struct element *elem, *sub;
@@ -2521,7 +2533,7 @@ cfg80211_defrag_mle(const struct element *mle, const u8 *ie, size_t ielen,
 	return NULL;
 }
 
-static bool
+static u8
 cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
 			      const struct ieee80211_neighbor_ap_info **ap_info,
 			      const u8 **tbtt_info)
@@ -2540,6 +2552,7 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
 			u16 params;
 			u8 length, i, count, mld_params_offset;
 			u8 type, lid;
+			u32 use_for;
 
 			info = (void *)pos;
 			count = u8_get_bits(info->tbtt_info_hdr,
@@ -2549,20 +2562,22 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
 			pos += sizeof(*info);
 
 			if (count * length > end - pos)
-				return false;
+				return 0;
 
 			type = u8_get_bits(info->tbtt_info_hdr,
 					   IEEE80211_AP_INFO_TBTT_HDR_TYPE);
 
-			/* Only accept full TBTT information. NSTR mobile APs
-			 * use the shortened version, but we ignore them here.
-			 */
 			if (type == IEEE80211_TBTT_INFO_TYPE_TBTT &&
 			    length >=
 			    offsetofend(struct ieee80211_tbtt_info_ge_11,
 					mld_params)) {
 				mld_params_offset =
 					offsetof(struct ieee80211_tbtt_info_ge_11, mld_params);
+				use_for = NL80211_BSS_USE_FOR_ALL;
+			} else if (type == IEEE80211_TBTT_INFO_TYPE_MLD &&
+				   length >= sizeof(struct ieee80211_rnr_mld_params)) {
+				mld_params_offset = 0;
+				use_for = NL80211_BSS_USE_FOR_MLD_LINK;
 			} else {
 				pos += count * length;
 				continue;
@@ -2580,7 +2595,7 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
 					*ap_info = info;
 					*tbtt_info = pos;
 
-					return true;
+					return use_for;
 				}
 
 				pos += length;
@@ -2588,7 +2603,7 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
 		}
 	}
 
-	return false;
+	return 0;
 }
 
 static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
@@ -2676,7 +2691,7 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
 		const u8 *profile;
 		const u8 *tbtt_info;
 		ssize_t profile_len;
-		u8 link_id;
+		u8 link_id, use_for;
 
 		if (!ieee80211_mle_basic_sta_prof_size_ok((u8 *)mle->sta_prof[i],
 							  mle->sta_prof_len[i]))
@@ -2718,9 +2733,11 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
 		profile_len -= 2;
 
 		/* Find in RNR to look up channel information */
-		if (!cfg80211_tbtt_info_for_mld_ap(tx_data->ie, tx_data->ielen,
-						   mld_id, link_id,
-						   &ap_info, &tbtt_info))
+		use_for = cfg80211_tbtt_info_for_mld_ap(tx_data->ie,
+							tx_data->ielen,
+							mld_id, link_id,
+							&ap_info, &tbtt_info);
+		if (!use_for)
 			continue;
 
 		/* We could sanity check the BSSID is included */
@@ -2732,6 +2749,14 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
 		freq = ieee80211_channel_to_freq_khz(ap_info->channel, band);
 		data.channel = ieee80211_get_channel_khz(wiphy, freq);
 
+		if (use_for == NL80211_BSS_USE_FOR_MLD_LINK &&
+		    !(wiphy->flags & WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY)) {
+			use_for = 0;
+			data.cannot_use_reasons =
+				NL80211_BSS_CANNOT_USE_NSTR_NONPRIMARY;
+		}
+		data.use_for = use_for;
+
 		/* Generate new elements */
 		memset(new_ie, 0, IEEE80211_MAX_DATA_LEN);
 		data.ie = new_ie;
@@ -2769,6 +2794,10 @@ cfg80211_inform_bss_data(struct wiphy *wiphy,
 		.beacon_interval = beacon_interval,
 		.ie = ie,
 		.ielen = ielen,
+		.use_for = data->restrict_use ?
+				data->use_for :
+				NL80211_BSS_USE_FOR_ALL,
+		.cannot_use_reasons = data->cannot_use_reasons,
 	};
 	struct cfg80211_bss *res;
 
@@ -2899,6 +2928,10 @@ cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
 	tmp.pub.chains = data->chains;
 	memcpy(tmp.pub.chain_signal, data->chain_signal, IEEE80211_MAX_CHAINS);
 	ether_addr_copy(tmp.parent_bssid, data->parent_bssid);
+	tmp.pub.use_for = data->restrict_use ?
+				data->use_for :
+				NL80211_BSS_USE_FOR_ALL;
+	tmp.pub.cannot_use_reasons = data->cannot_use_reasons;
 
 	signal_valid = data->chan == channel;
 	spin_lock_bh(&rdev->bss_lock);
@@ -2930,6 +2963,10 @@ cfg80211_inform_bss_frame_data(struct wiphy *wiphy,
 		.ie = mgmt->u.probe_resp.variable,
 		.ielen = len - offsetof(struct ieee80211_mgmt,
 					u.probe_resp.variable),
+		.use_for = data->restrict_use ?
+				data->use_for :
+				NL80211_BSS_USE_FOR_ALL,
+		.cannot_use_reasons = data->cannot_use_reasons,
 	};
 	struct cfg80211_bss *res;
 
-- 
2.34.1

[PATCH 03/14] wifi: mac80211: update some locking documentation

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

With the locking rework, more functions need to be called
with the wiphy mutex held. Document that, and for that use
the "Context" description that shows up more nicely in the
generated documentation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 include/net/mac80211.h | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 580781ff9dcf..aa8e1055fc3a 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -5809,12 +5809,11 @@ void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf,
  * ieee80211_remove_key - remove the given key
  * @keyconf: the parameter passed with the set key
  *
+ * Context: Must be called with the wiphy mutex held.
+ *
  * Remove the given key. If the key was uploaded to the hardware at the
  * time this function is called, it is not deleted in the hardware but
  * instead assumed to have been removed already.
- *
- * Note that due to locking considerations this function can (currently)
- * only be called during key iteration (ieee80211_iter_keys().)
  */
 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf);
 
@@ -6368,12 +6367,12 @@ ieee80211_txq_airtime_check(struct ieee80211_hw *hw, struct ieee80211_txq *txq);
  * @iter: iterator function that will be called for each key
  * @iter_data: custom data to pass to the iterator function
  *
+ * Context: Must be called with wiphy mutex held; can sleep.
+ *
  * This function can be used to iterate all the keys known to
  * mac80211, even those that weren't previously programmed into
  * the device. This is intended for use in WoWLAN if the device
- * needs reprogramming of the keys during suspend. Note that due
- * to locking reasons, it is also only safe to call this at few
- * spots since it must hold the RTNL and be able to sleep.
+ * needs reprogramming of the keys during suspend.
  *
  * The order in which the keys are iterated matches the order
  * in which they were originally installed and handed to the
@@ -7435,6 +7434,9 @@ static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
  * @vif: interface to set active links on
  * @active_links: the new active links bitmap
  *
+ * Context: Must be called with wiphy mutex held; may sleep; calls
+ *	back into the driver.
+ *
  * This changes the active links on an interface. The interface
  * must be in client mode (in AP mode, all links are always active),
  * and @active_links must be a subset of the vif's valid_links.
@@ -7442,6 +7444,7 @@ static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
  * If a link is switched off and another is switched on at the same
  * time (e.g. active_links going from 0x1 to 0x10) then you will get
  * a sequence of calls like
+ *
  *  - change_vif_links(0x11)
  *  - unassign_vif_chanctx(link_id=0)
  *  - change_sta_links(0x11) for each affected STA (the AP)
@@ -7451,10 +7454,6 @@ static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
  *  - change_sta_links(0x10) for each affected STA (the AP)
  *  - assign_vif_chanctx(link_id=4)
  *  - change_vif_links(0x10)
- *
- * Note: This function acquires some mac80211 locks and must not
- *	 be called with any driver locks held that could cause a
- *	 lock dependency inversion. Best call it without locks.
  */
 int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links);
 
-- 
2.34.1

[PATCH 04/14] wifi: cfg80211: Add support for setting TID to link mapping

[Miri Korenblit]

From: Ilan Peer <ilan.peer@intel.com>

Add support for setting the TID to link mapping for a non-AP MLD
station.

This is useful in cases user space needs to restrict the possible
set of active links, e.g., since it got a BSS Transition Management
request forcing to use only a subset of the valid links etc.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 include/net/cfg80211.h       | 18 ++++++++++++++++++
 include/uapi/linux/nl80211.h | 19 ++++++++++++++++++
 net/wireless/nl80211.c       | 37 ++++++++++++++++++++++++++++++++++++
 net/wireless/rdev-ops.h      | 18 ++++++++++++++++++
 net/wireless/trace.h         | 20 +++++++++++++++++++
 5 files changed, 112 insertions(+)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index c0d16fbf4aba..bb03e83f873c 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1664,6 +1664,21 @@ struct link_station_del_parameters {
 	u32 link_id;
 };
 
+/**
+ * struct cfg80211_ttlm_params: TID to link mapping parameters
+ *
+ * Used for setting a TID to link mapping.
+ *
+ * @dlink: Downlink TID to link mapping, as defined in section 9.4.2.314
+ *     (TID-To-Link Mapping element) in Draft P802.11be_D4.0.
+ * @ulink: Uplink TID to link mapping, as defined in section 9.4.2.314
+ *     (TID-To-Link Mapping element) in Draft P802.11be_D4.0.
+ */
+struct cfg80211_ttlm_params {
+	u16 dlink[8];
+	u16 ulink[8];
+};
+
 /**
  * struct station_parameters - station parameters
  *
@@ -4514,6 +4529,7 @@ struct mgmt_frame_regs {
  * @del_link_station: Remove a link of a station.
  *
  * @set_hw_timestamp: Enable/disable HW timestamping of TM/FTM frames.
+ * @set_ttlm: set the TID to link mapping.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -4873,6 +4889,8 @@ struct cfg80211_ops {
 				    struct link_station_del_parameters *params);
 	int	(*set_hw_timestamp)(struct wiphy *wiphy, struct net_device *dev,
 				    struct cfg80211_set_hw_timestamp *hwts);
+	int	(*set_ttlm)(struct wiphy *wiphy, struct net_device *dev,
+			    struct cfg80211_ttlm_params *params);
 };
 
 /*
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 7d774f6b3454..a31a81911a2d 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1327,6 +1327,11 @@
  *	Multi-Link reconfiguration. %NL80211_ATTR_MLO_LINKS is used to provide
  *	information about the removed STA MLD setup links.
  *
+ * @NL80211_CMD_SET_TID_TO_LINK_MAPPING: Set the TID to Link Mapping for a
+ *      non-AP MLD station. The %NL80211_ATTR_MLO_TTLM_DLINK and
+ *      %NL80211_ATTR_MLO_TTLM_ULINK attributes are used to specify the
+ *      TID to Link mapping for downlink/uplink traffic.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -1582,6 +1587,8 @@ enum nl80211_commands {
 
 	NL80211_CMD_LINKS_REMOVED,
 
+	NL80211_CMD_SET_TID_TO_LINK_MAPPING,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -2834,6 +2841,15 @@ enum nl80211_commands {
  *	include BSSes that can only be used in restricted scenarios and/or
  *	cannot be used at all.
  *
+ * @NL80211_ATTR_MLO_TTLM_DLINK: Binary attribute specifying the downlink TID to
+ *      link mapping. The length is 8 * sizeof(u16). For each TID the link
+ *      mapping is as defined in section 9.4.2.314 (TID-To-Link Mapping element)
+ *      in Draft P802.11be_D4.0.
+ * @NL80211_ATTR_MLO_TTLM_ULINK: Binary attribute specifying the uplink TID to
+ *      link mapping. The length is 8 * sizeof(u16). For each TID the link
+ *      mapping is as defined in section 9.4.2.314 (TID-To-Link Mapping element)
+ *      in Draft P802.11be_D4.0.
+ *
  * @NUM_NL80211_ATTR: total number of nl80211_attrs available
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3374,6 +3390,9 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA,
 
+	NL80211_ATTR_MLO_TTLM_DLINK,
+	NL80211_ATTR_MLO_TTLM_ULINK,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7dec0027daaa..2faf02895c01 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -819,6 +819,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_EMA_RNR_ELEMS] = { .type = NLA_NESTED },
 	[NL80211_ATTR_MLO_LINK_DISABLED] = { .type = NLA_FLAG },
 	[NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA] = { .type = NLA_FLAG },
+	[NL80211_ATTR_MLO_TTLM_DLINK] = NLA_POLICY_EXACT_LEN(sizeof(u16) * 8),
+	[NL80211_ATTR_MLO_TTLM_ULINK] = NLA_POLICY_EXACT_LEN(sizeof(u16) * 8),
 };
 
 /* policy for the key attributes */
@@ -16258,6 +16260,35 @@ static int nl80211_set_hw_timestamp(struct sk_buff *skb,
 	return rdev_set_hw_timestamp(rdev, dev, &hwts);
 }
 
+static int
+nl80211_set_ttlm(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_ttlm_params params = {};
+	struct cfg80211_registered_device *rdev = info->user_ptr[0];
+	struct net_device *dev = info->user_ptr[1];
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+
+	if (wdev->iftype != NL80211_IFTYPE_STATION &&
+	    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
+		return -EOPNOTSUPP;
+
+	if (!wdev->connected)
+		return -ENOLINK;
+
+	if (!info->attrs[NL80211_ATTR_MLO_TTLM_DLINK] ||
+	    !info->attrs[NL80211_ATTR_MLO_TTLM_ULINK])
+		return -EINVAL;
+
+	nla_memcpy(params.dlink,
+		   info->attrs[NL80211_ATTR_MLO_TTLM_DLINK],
+		   sizeof(params.dlink));
+	nla_memcpy(params.ulink,
+		   info->attrs[NL80211_ATTR_MLO_TTLM_ULINK],
+		   sizeof(params.ulink));
+
+	return rdev_set_ttlm(rdev, dev, &params);
+}
+
 #define NL80211_FLAG_NEED_WIPHY		0x01
 #define NL80211_FLAG_NEED_NETDEV	0x02
 #define NL80211_FLAG_NEED_RTNL		0x04
@@ -17439,6 +17470,12 @@ static const struct genl_small_ops nl80211_small_ops[] = {
 		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 	},
+	{
+		.cmd = NL80211_CMD_SET_TID_TO_LINK_MAPPING,
+		.doit = nl80211_set_ttlm,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
+	},
 };
 
 static struct genl_family nl80211_fam __ro_after_init = {
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index 2214a90cf101..2a27a3448759 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -1524,4 +1524,22 @@ rdev_set_hw_timestamp(struct cfg80211_registered_device *rdev,
 
 	return ret;
 }
+
+static inline int
+rdev_set_ttlm(struct cfg80211_registered_device *rdev,
+	      struct net_device *dev,
+	      struct cfg80211_ttlm_params *params)
+{
+	struct wiphy *wiphy = &rdev->wiphy;
+	int ret;
+
+	if (!rdev->ops->set_ttlm)
+		return -EOPNOTSUPP;
+
+	trace_rdev_set_ttlm(wiphy, dev, params);
+	ret = rdev->ops->set_ttlm(wiphy, dev, params);
+	trace_rdev_return_int(wiphy, ret);
+
+	return ret;
+}
 #endif /* __CFG80211_RDEV_OPS */
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 4de710efa47e..1f374c8a17a5 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -3979,6 +3979,26 @@ TRACE_EVENT(cfg80211_links_removed,
 		  __entry->link_mask)
 );
 
+TRACE_EVENT(rdev_set_ttlm,
+	TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
+		 struct cfg80211_ttlm_params *params),
+	TP_ARGS(wiphy, netdev, params),
+	TP_STRUCT__entry(
+		WIPHY_ENTRY
+		NETDEV_ENTRY
+		__array(u8, dlink, sizeof(u16) * 8)
+		__array(u8, ulink, sizeof(u16) * 8)
+	),
+	TP_fast_assign(
+		WIPHY_ASSIGN;
+		NETDEV_ASSIGN;
+		memcpy(__entry->dlink, params->dlink, sizeof(params->dlink));
+		memcpy(__entry->ulink, params->ulink, sizeof(params->ulink));
+	),
+	TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT,
+		  WIPHY_PR_ARG, NETDEV_PR_ARG)
+);
+
 #endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
 
 #undef TRACE_INCLUDE_PATH
-- 
2.34.1

[PATCH 05/14] wifi: mac80211: add a flag to disallow puncturing

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

There may be cases where puncturing isn't possible, and
a connection needs to be downgraded. Add a hardware flag
to support this.

This is likely temporary: it seems we will need to move
puncturing to the chandef/channel context.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 include/net/mac80211.h |  4 ++++
 net/mac80211/debugfs.c |  1 +
 net/mac80211/mlme.c    | 12 ++++++++++--
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index aa8e1055fc3a..77a71b1396b1 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2686,6 +2686,9 @@ struct ieee80211_txq {
  * @IEEE80211_HW_MLO_MCAST_MULTI_LINK_TX: Hardware/driver handles transmitting
  *	multicast frames on all links, mac80211 should not do that.
  *
+ * @IEEE80211_HW_DISALLOW_PUNCTURING: HW requires disabling puncturing in EHT
+ *	and connecting with a lower bandwidth instead
+ *
  * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
  */
 enum ieee80211_hw_flags {
@@ -2743,6 +2746,7 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_SUPPORTS_CONC_MON_RX_DECAP,
 	IEEE80211_HW_DETECTS_COLOR_COLLISION,
 	IEEE80211_HW_MLO_MCAST_MULTI_LINK_TX,
+	IEEE80211_HW_DISALLOW_PUNCTURING,
 
 	/* keep last, obviously */
 	NUM_IEEE80211_HW_FLAGS
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index b575ae90e57f..74be49191e70 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -497,6 +497,7 @@ static const char *hw_flag_names[] = {
 	FLAG(SUPPORTS_CONC_MON_RX_DECAP),
 	FLAG(DETECTS_COLOR_COLLISION),
 	FLAG(MLO_MCAST_MULTI_LINK_TX),
+	FLAG(DISALLOW_PUNCTURING),
 #undef FLAG
 };
 
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 887b496f2b81..2b1b64eb82f7 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -135,6 +135,7 @@ ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link,
 				   u16 bitmap, u64 *changed)
 {
 	struct cfg80211_chan_def *chandef = &link->conf->chandef;
+	struct ieee80211_local *local = link->sdata->local;
 	u16 extracted;
 	u64 _changed = 0;
 
@@ -147,7 +148,9 @@ ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link,
 							 bitmap);
 
 		if (cfg80211_valid_disable_subchannel_bitmap(&bitmap,
-							     chandef))
+							     chandef) &&
+		    !(bitmap && ieee80211_hw_check(&local->hw,
+						   DISALLOW_PUNCTURING)))
 			break;
 		link->u.mgd.conn_flags |=
 			ieee80211_chandef_downgrade(chandef);
@@ -5682,6 +5685,7 @@ static bool ieee80211_config_puncturing(struct ieee80211_link_data *link,
 					const struct ieee80211_eht_operation *eht_oper,
 					u64 *changed)
 {
+	struct ieee80211_local *local = link->sdata->local;
 	u16 bitmap = 0, extracted;
 
 	if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) &&
@@ -5713,6 +5717,9 @@ static bool ieee80211_config_puncturing(struct ieee80211_link_data *link,
 		return false;
 	}
 
+	if (bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING))
+		return false;
+
 	ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed);
 	return true;
 }
@@ -7584,7 +7591,8 @@ ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
 
 			bitmap = get_unaligned_le16(disable_subchannel_bitmap);
 			if (cfg80211_valid_disable_subchannel_bitmap(&bitmap,
-								     &link->conf->chandef))
+								     &link->conf->chandef) &&
+			    !(bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING)))
 				ieee80211_handle_puncturing_bitmap(link,
 								   eht_oper,
 								   bitmap,
-- 
2.34.1

[PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP mapping

[Miri Korenblit]

From: Ilan Peer <ilan.peer@intel.com>

The default DSCP-to-UP mapping method defined in RFC8325
applied to packets marked per recommendations in RFC4594 and
destined to 802.11 WLAN clients will yield a number of inconsistent
QoS mappings.

To handle this, modify the mapping of specific DSCP values for
which the default mapping will create inconsistencies, based on
the recommendations in section 4 in RFC8325.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/wireless/util.c | 46 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 626b858b4b35..dd93e1950921 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -980,7 +980,53 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb,
 		}
 	}
 
+	/* The default mapping as defined in RFC8325 */
 	ret = dscp >> 5;
+
+	/* Handle specific DSCP values for which the default mapping doesn't
+	 * adhere to the intended usage of the DSCP value. See section 4 in
+	 * RFC8325.
+	 */
+	switch (dscp >> 2) {
+	case 10:
+	case 12:
+	case 14:
+		/* High throughput data: AF11, AF12, AF13 */
+		ret = 0;
+		break;
+	case 16:
+		/* Operations, Administration, and Maintenance and Provisioning:
+		 * CS2
+		 */
+		ret = 0;
+		break;
+	case 18:
+	case 20:
+	case 22:
+		/* Low latency data: AF21, AF22, AF23 */
+		ret = 3;
+		break;
+	case 24:
+		/* Broadcasting video: CS23 */
+		ret = 4;
+		break;
+	case 40:
+		/* Signaling: CS5 */
+		ret = 5;
+		break;
+	case 44:
+		/* Voice Admit */
+		ret = 6;
+		break;
+	case 46:
+		/* Telephony traffic: EF */
+		ret = 6;
+		break;
+	case 48:
+		/* Network Control Traffic: CS6 */
+		ret = 7;
+		break;
+	}
 out:
 	return array_index_nospec(ret, IEEE80211_NUM_TIDS);
 }
-- 
2.34.1

Re: [PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP mapping

[Johannes Berg]

> 
> The default DSCP-to-UP mapping method defined in RFC8325
> applied to packets marked per recommendations in RFC4594 and
> destined to 802.11 WLAN clients will yield a number of inconsistent
> QoS mappings.
> 
> To handle this, modify the mapping of specific DSCP values for
> which the default mapping will create inconsistencies, based on
> the recommendations in section 4 in RFC8325.
> 

This breaks ap_qosmap_default_acm ap_qosmap_default test cases.

How should we handle that?

johannes

RE: [PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP mapping

[Peer, Ilan]

Hi,

> -----Original Message-----
> From: Johannes Berg <johannes@sipsolutions.net>
> Sent: Tuesday, December 12, 2023 11:40
> To: Korenblit, Miriam Rachel <miriam.rachel.korenblit@intel.com>
> Cc: linux-wireless@vger.kernel.org; Peer, Ilan <ilan.peer@intel.com>;
> Greenman, Gregory <gregory.greenman@intel.com>; Jouni Malinen <j@w1.fi>
> Subject: Re: [PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP
> mapping
> 
> >
> > The default DSCP-to-UP mapping method defined in RFC8325 applied to
> > packets marked per recommendations in RFC4594 and destined to 802.11
> > WLAN clients will yield a number of inconsistent QoS mappings.
> >
> > To handle this, modify the mapping of specific DSCP values for which
> > the default mapping will create inconsistencies, based on the
> > recommendations in section 4 in RFC8325.
> >
> 
> This breaks ap_qosmap_default_acm ap_qosmap_default test cases.
> 
> How should we handle that?

Corresponding change for hostap:  https://patchwork.ozlabs.org/project/hostap/patch/20231213113735.289408-1-andrei.otcheretianski@intel.com/.

Regards,

Ilan.

Re: [PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP mapping

[Jouni Malinen]

On Mon, Dec 11, 2023 at 09:05:24AM +0200, Miri Korenblit wrote:
> The default DSCP-to-UP mapping method defined in RFC8325
> applied to packets marked per recommendations in RFC4594 and
> destined to 802.11 WLAN clients will yield a number of inconsistent
> QoS mappings.
> 
> To handle this, modify the mapping of specific DSCP values for
> which the default mapping will create inconsistencies, based on
> the recommendations in section 4 in RFC8325.

Could this commit message give some more justification for why these
exact specifications are the best source of this information? For
example, should this also reference the Wi-Fi QoS Management
specification?

> diff --git a/net/wireless/util.c b/net/wireless/util.c
> @@ -980,7 +980,53 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb,
>  		}
>  	}
>  
> +	/* The default mapping as defined in RFC8325 */
>  	ret = dscp >> 5;

Could you point to the exact location in RFC 8325 that has that as the
default mapping? Figure 1 has this note: "Note: All unused codepoints
are RECOMMENDED to be mapped to UP 0".

Section 2.4 does describe what many APs do, but that section is called
"Default UP-to-DSCP Mappings and Conflicts" which does not sound like a
recommended default mapping in RFC 8325..

> +	/* Handle specific DSCP values for which the default mapping doesn't
> +	 * adhere to the intended usage of the DSCP value. See section 4 in
> +	 * RFC8325.
> +	 */
> +	switch (dscp >> 2) {

What about "Standard: DF" (0 --> 0) and "Low-Priority Data: CS1" (8 ->
1)? Are those omitted here because the "dscp >> 5" happens to have same
value? It would seem to be good to have at least a comment here pointing
that out in particular taken into account that comment above about the
status of that "default mapping" and how it relates to RFC 8325.

> +	case 10:
> +	case 12:
> +	case 14:
> +		/* High throughput data: AF11, AF12, AF13 */
> +		ret = 0;
> +		break;
> +	case 16:
> +		/* Operations, Administration, and Maintenance and Provisioning:
> +		 * CS2
> +		 */
> +		ret = 0;
> +		break;
> +	case 18:
> +	case 20:
> +	case 22:
> +		/* Low latency data: AF21, AF22, AF23 */
> +		ret = 3;
> +		break;
> +	case 24:
> +		/* Broadcasting video: CS23 */
> +		ret = 4;
> +		break;

Typo.. Should be "CS3" instead of "CS23".

What about "Multimedia Streaming: AF31, AF32, AF33"? Shouldn't those
values 26, 28, 30 be mapped to 4? If not, it would be good to add a
comment explaining why that is not here while it is included in RFC 8325
Figure 1.

What about "Real-Time Interactive: CS4"? Shouldn't that value 32 be
mapped to 4? If not, it would be good to add a comment explaining why
that is not here while it is included in RFC 8325 Figure 1.

What about "Multimedia Conferencing: AF41, AF42, AF43"? Shouldn't those
values 34, 36, 38 be mapped to 4? If not, it would be good to add a
comment explaining why that is not here while it is included in RFC 8325
Figure 1.

> +	case 40:
> +		/* Signaling: CS5 */
> +		ret = 5;
> +		break;
> +	case 44:
> +		/* Voice Admit */
> +		ret = 6;
> +		break;

To be consistent, that comment should be "VOICE-ADMIT: VA".

> +	case 46:
> +		/* Telephony traffic: EF */
> +		ret = 6;
> +		break;
> +	case 48:
> +		/* Network Control Traffic: CS6 */
> +		ret = 7;
> +		break;
> +	}

This does not include "Network Control: CS7". Is there a reason for not
covering that case 56 now? I know it is "reserved for future use", but
RFC 8325 does provide mapping for it as well.

-- 
Jouni Malinen                                            PGP id EFC895FA

RE: [PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP mapping

[Peer, Ilan]

Hi,

> -----Original Message-----
> From: Jouni Malinen <j@w1.fi>
> Sent: Sunday, December 17, 2023 11:42
> To: Korenblit, Miriam Rachel <miriam.rachel.korenblit@intel.com>
> Cc: johannes@sipsolutions.net; linux-wireless@vger.kernel.org; Peer, Ilan
> <ilan.peer@intel.com>; Greenman, Gregory <gregory.greenman@intel.com>;
> Berg, Johannes <johannes.berg@intel.com>
> Subject: Re: [PATCH 06/14] wifi: cfg80211: Update the default DSCP-to-UP
> mapping
> 
> On Mon, Dec 11, 2023 at 09:05:24AM +0200, Miri Korenblit wrote:
> > The default DSCP-to-UP mapping method defined in RFC8325 applied to
> > packets marked per recommendations in RFC4594 and destined to 802.11
> > WLAN clients will yield a number of inconsistent QoS mappings.
> >
> > To handle this, modify the mapping of specific DSCP values for which
> > the default mapping will create inconsistencies, based on the
> > recommendations in section 4 in RFC8325.
> 
> Could this commit message give some more justification for why these exact
> specifications are the best source of this information? For example, should this
> also reference the Wi-Fi QoS Management specification?
> 

I was using these specifications since they were mentioned in the Wi-Fi QoS Management specification
and because RFC8325 was specifically mentioned in the WFA test plan specifications.
I'll update the commit message. 

> > diff --git a/net/wireless/util.c b/net/wireless/util.c @@ -980,7
> > +980,53 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb,
> >  		}
> >  	}
> >
> > +	/* The default mapping as defined in RFC8325 */
> >  	ret = dscp >> 5;
> 
> Could you point to the exact location in RFC 8325 that has that as the default
> mapping? Figure 1 has this note: "Note: All unused codepoints are
> RECOMMENDED to be mapped to UP 0".
> 
> Section 2.4 does describe what many APs do, but that section is called
> "Default UP-to-DSCP Mappings and Conflicts" which does not sound like a
> recommended default mapping in RFC 8325..
> 

The term "Default DSCP-to-UP" is defined in section 2.3 in RFC8325. As noted there, this is
not a specification definition, but more a term to describe what is a "common practice in the
networking industry".

> > +	/* Handle specific DSCP values for which the default mapping doesn't
> > +	 * adhere to the intended usage of the DSCP value. See section 4 in
> > +	 * RFC8325.
> > +	 */
> > +	switch (dscp >> 2) {
> 
> What about "Standard: DF" (0 --> 0) and "Low-Priority Data: CS1" (8 -> 1)?
> Are those omitted here because the "dscp >> 5" happens to have same value?
> It would seem to be good to have at least a comment here pointing that out in
> particular taken into account that comment above about the status of that
> "default mapping" and how it relates to RFC 8325.
> 

Yes. I thought my comment above was clear about it, but I'll rephrase it to make
It clearer.

> > +	case 10:
> > +	case 12:
> > +	case 14:
> > +		/* High throughput data: AF11, AF12, AF13 */
> > +		ret = 0;
> > +		break;
> > +	case 16:
> > +		/* Operations, Administration, and Maintenance and
> Provisioning:
> > +		 * CS2
> > +		 */
> > +		ret = 0;
> > +		break;
> > +	case 18:
> > +	case 20:
> > +	case 22:
> > +		/* Low latency data: AF21, AF22, AF23 */
> > +		ret = 3;
> > +		break;
> > +	case 24:
> > +		/* Broadcasting video: CS23 */
> > +		ret = 4;
> > +		break;
> 
> Typo.. Should be "CS3" instead of "CS23".
> 

Fixed.

> What about "Multimedia Streaming: AF31, AF32, AF33"? Shouldn't those
> values 26, 28, 30 be mapped to 4? If not, it would be good to add a comment
> explaining why that is not here while it is included in RFC 8325 Figure 1.
> 

The default mapping maps AF31, AF32 and AF33 to 4 which is the recommended mapping.
I'll add a comment.

> What about "Real-Time Interactive: CS4"? Shouldn't that value 32 be mapped
> to 4? If not, it would be good to add a comment explaining why that is not
> here while it is included in RFC 8325 Figure 1.
> 

Same here. The default mapping is used. I'll add a comment.

> What about "Multimedia Conferencing: AF41, AF42, AF43"? Shouldn't those
> values 34, 36, 38 be mapped to 4? If not, it would be good to add a comment
> explaining why that is not here while it is included in RFC 8325 Figure 1.
> 

Same.

> > +	case 40:
> > +		/* Signaling: CS5 */
> > +		ret = 5;
> > +		break;
> > +	case 44:
> > +		/* Voice Admit */
> > +		ret = 6;
> > +		break;
> 
> To be consistent, that comment should be "VOICE-ADMIT: VA".
> 

Fixed.

> > +	case 46:
> > +		/* Telephony traffic: EF */
> > +		ret = 6;
> > +		break;
> > +	case 48:
> > +		/* Network Control Traffic: CS6 */
> > +		ret = 7;
> > +		break;
> > +	}
> 
> This does not include "Network Control: CS7". Is there a reason for not
> covering that case 56 now? I know it is "reserved for future use", but RFC
> 8325 does provide mapping for it as well.
> 
 
Same.

Regards,

Ilan.

[PATCH v2] wifi: cfg80211: Update the default DSCP-to-UP mapping

[Ilan Peer]

The default DSCP-to-UP mapping method defined in RFC8325
applied to packets marked per recommendations in RFC4594 and
destined to 802.11 WLAN clients will yield a number of inconsistent
QoS mappings.

To handle this, modify the mapping of specific DSCP values for
which the default mapping will create inconsistencies, based on
the recommendations in section 4 in RFC8325.

Note: RFC8235 is used as it referenced by both IEEE802.11Revme_D4.0
and WFA QoS Management Specification.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/wireless/util.c | 56 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 626b858b4b35..d1ce3bee2797 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -980,7 +980,63 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb,
 		}
 	}
 
+	/* The default mapping as defined Section 2.3 in RFC8325: The three
+	 * Most Significant Bits (MSBs) of the DSCP are used as the
+	 * corresponding L2 markings.
+	 */
 	ret = dscp >> 5;
+
+	/* Handle specific DSCP values for which the default mapping (as
+	 * described above) doesn't adhere to the intended usage of the DSCP
+	 * value. See section 4 in RFC8325. Specifically, for the following
+	 * Diffserv Service Classes no update is needed:
+	 * - Standard: DF
+	 * - Low Priority Data: CS1
+	 * - Multimedia Streaming: AF31, AF32, AF33
+	 * - Multimedia Conferencing: AF41, AF42, AF43
+	 * - Network Control Traffic: CS7
+	 * - Real-Time Interactive: CS4
+	 */
+	switch (dscp >> 2) {
+	case 10:
+	case 12:
+	case 14:
+		/* High throughput data: AF11, AF12, AF13 */
+		ret = 0;
+		break;
+	case 16:
+		/* Operations, Administration, and Maintenance and Provisioning:
+		 * CS2
+		 */
+		ret = 0;
+		break;
+	case 18:
+	case 20:
+	case 22:
+		/* Low latency data: AF21, AF22, AF23 */
+		ret = 3;
+		break;
+	case 24:
+		/* Broadcasting video: CS3 */
+		ret = 4;
+		break;
+	case 40:
+		/* Signaling: CS5 */
+		ret = 5;
+		break;
+	case 44:
+		/* Voice Admit: VA */
+		ret = 6;
+		break;
+	case 46:
+		/* Telephony traffic: EF */
+		ret = 6;
+		break;
+	case 48:
+		/* Network Control Traffic: CS6 */
+		ret = 7;
+		break;
+	}
 out:
 	return array_index_nospec(ret, IEEE80211_NUM_TIDS);
 }
-- 
2.34.1

[PATCH 07/14] wifi: mac80211: Replace ENOTSUPP with EOPNOTSUPP

[Miri Korenblit]

From: Andrei Otcheretianski <andrei.otcheretianski@intel.com>

ENOTSUP isn't a standard error code. EOPNOTSUPP should be used instead.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/cfg.c          |  4 ++--
 net/mac80211/chan.c         |  4 ++--
 net/mac80211/driver-ops.h   |  2 +-
 net/mac80211/mesh_hwmp.c    |  2 +-
 net/mac80211/mesh_pathtbl.c |  8 ++++----
 net/mac80211/scan.c         |  4 ++--
 net/mac80211/tdls.c         | 18 +++++++++---------
 7 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 606b1b2e4123..e0a4f9eecb2c 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1270,7 +1270,7 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 		return -EALREADY;
 
 	if (params->smps_mode != NL80211_SMPS_OFF)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	link->smps_mode = IEEE80211_SMPS_OFF;
 
@@ -2556,7 +2556,7 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy,
 		 * devices that report signal in dBm.
 		 */
 		if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
-			return -ENOTSUPP;
+			return -EOPNOTSUPP;
 		conf->rssi_threshold = nconf->rssi_threshold;
 	}
 	if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 1d928f29ad6f..d26726b2629d 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -858,7 +858,7 @@ static int ieee80211_assign_link_chanctx(struct ieee80211_link_data *link,
 	int ret = 0;
 
 	if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_NAN))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	conf = rcu_dereference_protected(link->conf->chanctx_conf,
 					 lockdep_is_held(&local->hw.wiphy->mtx));
@@ -1106,7 +1106,7 @@ int ieee80211_link_reserve_chanctx(struct ieee80211_link_data *link,
 
 	curr_ctx = ieee80211_link_get_chanctx(link);
 	if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode);
 	if (!new_ctx) {
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 568633b38c47..fecf92f06da7 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -800,7 +800,7 @@ drv_cancel_remain_on_channel(struct ieee80211_local *local,
 static inline int drv_set_ringparam(struct ieee80211_local *local,
 				    u32 tx, u32 rx)
 {
-	int ret = -ENOTSUPP;
+	int ret = -EOPNOTSUPP;
 
 	might_sleep();
 	lockdep_assert_wiphy(local->hw.wiphy);
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 775d52561c54..024f48db6b05 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -151,7 +151,7 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
 		break;
 	default:
 		kfree_skb(skb);
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 	*pos++ = ie_len;
 	*pos++ = flags;
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 8a3f44ce3e04..735edde1bd81 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -676,10 +676,10 @@ struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata,
 
 	if (ether_addr_equal(dst, sdata->vif.addr))
 		/* never add ourselves as neighbours */
-		return ERR_PTR(-ENOTSUPP);
+		return ERR_PTR(-EOPNOTSUPP);
 
 	if (is_multicast_ether_addr(dst))
-		return ERR_PTR(-ENOTSUPP);
+		return ERR_PTR(-EOPNOTSUPP);
 
 	if (atomic_add_unless(&sdata->u.mesh.mpaths, 1, MESH_MAX_MPATHS) == 0)
 		return ERR_PTR(-ENOSPC);
@@ -719,10 +719,10 @@ int mpp_path_add(struct ieee80211_sub_if_data *sdata,
 
 	if (ether_addr_equal(dst, sdata->vif.addr))
 		/* never add ourselves as neighbours */
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	if (is_multicast_ether_addr(dst))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
 
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 1d98877647d8..645355e5f1bc 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -1289,7 +1289,7 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
 	iebufsz = local->scan_ies_len + req->ie_len;
 
 	if (!local->ops->sched_scan_start)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	for (i = 0; i < NUM_NL80211_BANDS; i++) {
 		if (local->hw.wiphy->bands[i]) {
@@ -1354,7 +1354,7 @@ int ieee80211_request_sched_scan_stop(struct ieee80211_local *local)
 	lockdep_assert_wiphy(local->hw.wiphy);
 
 	if (!local->ops->sched_scan_stop)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	/* We don't want to restart sched scan anymore. */
 	RCU_INIT_POINTER(local->sched_scan_req, NULL);
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 05a7dff69fe9..49730b424141 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -1001,7 +1001,7 @@ ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 						 skb);
 		break;
 	default:
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 		break;
 	}
 
@@ -1071,7 +1071,7 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 		/* any value is ok */
 		break;
 	default:
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 		break;
 	}
 
@@ -1177,7 +1177,7 @@ ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
 	    smps_mode != IEEE80211_SMPS_OFF) {
 		tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n",
 			 smps_mode);
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 
 	lockdep_assert_wiphy(local->hw.wiphy);
@@ -1289,7 +1289,7 @@ int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
 	int ret;
 
 	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	/* make sure we are in managed mode, and associated */
 	if (sdata->vif.type != NL80211_IFTYPE_STATION ||
@@ -1446,7 +1446,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
 	lockdep_assert_wiphy(local->hw.wiphy);
 
 	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	if (sdata->vif.type != NL80211_IFTYPE_STATION)
 		return -EINVAL;
@@ -1459,7 +1459,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
 	case NL80211_TDLS_SETUP:
 	case NL80211_TDLS_DISCOVERY_REQ:
 		/* We don't support in-driver setup/teardown/discovery */
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 
 	/* protect possible bss_conf changes and avoid concurrency in
@@ -1510,7 +1510,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
 			return ret;
 		break;
 	default:
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 
 	if (ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
@@ -1673,7 +1673,7 @@ ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
 	if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) {
 		tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n",
 			 addr);
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 		goto out;
 	}
 
@@ -1993,7 +1993,7 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
 	if (!sta->sta.deflink.ht_cap.ht_supported && elems->sec_chan_offs &&
 	    elems->sec_chan_offs->sec_chan_offs) {
 		tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n");
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 		goto out;
 	}
 
-- 
2.34.1

[PATCH 08/14] wifi: cfg80211: Replace ENOTSUPP with EOPNOTSUPP

[Miri Korenblit]

From: Andrei Otcheretianski <andrei.otcheretianski@intel.com>

ENOTSUPP isn't a standard error code, don't use it.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/wireless/nl80211.c  | 4 ++--
 net/wireless/rdev-ops.h | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 2faf02895c01..59a1a235fce9 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -4853,7 +4853,7 @@ static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
 		return ERR_PTR(n_entries);
 
 	if (n_entries > wiphy->max_acl_mac_addrs)
-		return ERR_PTR(-ENOTSUPP);
+		return ERR_PTR(-EOPNOTSUPP);
 
 	acl = kzalloc(struct_size(acl, mac_addrs, n_entries), GFP_KERNEL);
 	if (!acl)
@@ -15867,7 +15867,7 @@ static int parse_tid_conf(struct cfg80211_registered_device *rdev,
 
 	if (tid_conf->mask & ~mask) {
 		NL_SET_ERR_MSG(extack, "unsupported TID configuration");
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 
 	return 0;
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index 2a27a3448759..43897a5269b6 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -1046,7 +1046,7 @@ rdev_nan_change_conf(struct cfg80211_registered_device *rdev,
 		ret = rdev->ops->nan_change_conf(&rdev->wiphy, wdev, conf,
 						 changes);
 	else
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 	trace_rdev_return_int(&rdev->wiphy, ret);
 	return ret;
 }
@@ -1200,7 +1200,7 @@ rdev_start_radar_detection(struct cfg80211_registered_device *rdev,
 			   struct cfg80211_chan_def *chandef,
 			   u32 cac_time_ms)
 {
-	int ret = -ENOTSUPP;
+	int ret = -EOPNOTSUPP;
 
 	trace_rdev_start_radar_detection(&rdev->wiphy, dev, chandef,
 					 cac_time_ms);
@@ -1226,7 +1226,7 @@ rdev_set_mcast_rate(struct cfg80211_registered_device *rdev,
 		    struct net_device *dev,
 		    int mcast_rate[NUM_NL80211_BANDS])
 {
-	int ret = -ENOTSUPP;
+	int ret = -EOPNOTSUPP;
 
 	trace_rdev_set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
 	if (rdev->ops->set_mcast_rate)
@@ -1239,7 +1239,7 @@ static inline int
 rdev_set_coalesce(struct cfg80211_registered_device *rdev,
 		  struct cfg80211_coalesce *coalesce)
 {
-	int ret = -ENOTSUPP;
+	int ret = -EOPNOTSUPP;
 
 	trace_rdev_set_coalesce(&rdev->wiphy, coalesce);
 	if (rdev->ops->set_coalesce)
-- 
2.34.1

[PATCH 09/14] wifi: cfg80211: generate an ML element for per-STA profiles

[Miri Korenblit]

From: Benjamin Berg <benjamin.berg@intel.com>

The specification says that this information should not be explicitly
included in the per-STA profile. However, we need this information
readily available in the BSS for userspace and also internally when
associating. As such, append the appropriate element before
adding/updating the BSS.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/wireless/scan.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 2f8c9b6f7ebc..3e3ba0ddb83e 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -2621,6 +2621,7 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
 	const struct element *elem;
 	struct cfg80211_mle *mle;
 	u16 control;
+	u8 ml_common_len;
 	u8 *new_ie;
 	struct cfg80211_bss *bss;
 	int mld_id;
@@ -2651,6 +2652,8 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
 	    !(control & IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP))
 		return;
 
+	ml_common_len = ml_elem->variable[0];
+
 	/* length + MLD MAC address + link ID info + BSS Params Change Count */
 	pos = ml_elem->variable + 1 + 6 + 1 + 1;
 
@@ -2767,6 +2770,34 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
 		if (!data.ielen)
 			continue;
 
+		/* The generated elements do not contain:
+		 *  - Basic ML element
+		 *  - A TBTT entry in the RNR for the transmitting AP
+		 *
+		 * This information is needed both internally and in userspace
+		 * as such, we should append it here.
+		 */
+		if (data.ielen + 3 + sizeof(*ml_elem) + ml_common_len >
+		    IEEE80211_MAX_DATA_LEN)
+			continue;
+
+		/* Copy the Basic Multi-Link element including the common
+		 * information, and then fix up the link ID.
+		 * Note that the ML element length has been verified and we
+		 * also checked that it contains the link ID.
+		 */
+		new_ie[data.ielen++] = WLAN_EID_EXTENSION;
+		new_ie[data.ielen++] = 1 + sizeof(*ml_elem) + ml_common_len;
+		new_ie[data.ielen++] = WLAN_EID_EXT_EHT_MULTI_LINK;
+		memcpy(new_ie + data.ielen, ml_elem,
+		       sizeof(*ml_elem) + ml_common_len);
+
+		new_ie[data.ielen + sizeof(*ml_elem) + 1 + ETH_ALEN] = link_id;
+
+		data.ielen += sizeof(*ml_elem) + ml_common_len;
+
+		/* TODO: Add an RNR containing only the reporting AP */
+
 		bss = cfg80211_inform_single_bss_data(wiphy, &data, gfp);
 		if (!bss)
 			break;
-- 
2.34.1

[PATCH 10/14] wifi: cfg80211: consume both probe response and beacon IEs

[Miri Korenblit]

From: Benjamin Berg <benjamin.berg@intel.com>

When doing a channel switch, cfg80211_update_known_bss may be called
with a BSS where both proberesp_ies and beacon_ies is set. If that
happens, both need to be consumed.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Berg, Johannes <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/wireless/scan.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 3e3ba0ddb83e..3d260c99c348 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1749,7 +1749,9 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev,
 				   new->pub.proberesp_ies);
 		if (old)
 			kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head);
-	} else if (rcu_access_pointer(new->pub.beacon_ies)) {
+	}
+
+	if (rcu_access_pointer(new->pub.beacon_ies)) {
 		const struct cfg80211_bss_ies *old;
 
 		if (known->pub.hidden_beacon_bss &&
-- 
2.34.1

[PATCH 11/14] wifi: mac80211: don't set ESS capab bit in assoc request

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

The ESS capability bit is reserved in frames transmitted by
the client, so we shouldn't set it. Since we've set it for
decades, keep that old behaviour unless we're connection to
a new EHT AP.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/mlme.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 2b1b64eb82f7..a693ca2cf8cd 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1385,7 +1385,7 @@ static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 	struct ieee80211_mgmt *mgmt;
 	u8 *pos, qos_info, *ie_start;
 	size_t offset, noffset;
-	u16 capab = WLAN_CAPABILITY_ESS, link_capab;
+	u16 capab = 0, link_capab;
 	__le16 listen_int;
 	struct element *ext_capa = NULL;
 	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
@@ -1532,6 +1532,17 @@ static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 	*pos++ = assoc_data->ssid_len;
 	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 
+	/*
+	 * This bit is technically reserved, so it shouldn't matter for either
+	 * the AP or us, but it also means we shouldn't set it. However, we've
+	 * always set it in the past, and apparently some EHT APs check that
+	 * we don't set it. To avoid interoperability issues with old APs that
+	 * for some reason check it and want it to be set, set the bit for all
+	 * pre-EHT connections as we used to do.
+	 */
+	if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)
+		capab |= WLAN_CAPABILITY_ESS;
+
 	/* add the elements for the assoc (main) link */
 	link_capab = capab;
 	offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
-- 
2.34.1

[PATCH 12/14] wifi: mac80211: check defragmentation succeeded

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

We need to check that cfg80211_defragment_element()
didn't return an error, since it can fail due to bad
input, and we didn't catch that before.

Fixes: 8eb8dd2ffbbb ("wifi: mac80211: Support link removal using Reconfiguration ML element")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/mlme.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index a693ca2cf8cd..40a4fbfff530 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -5800,7 +5800,7 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
 {
 	const struct ieee80211_multi_link_elem *ml;
 	const struct element *sub;
-	size_t ml_len;
+	ssize_t ml_len;
 	unsigned long removed_links = 0;
 	u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {};
 	u8 link_id;
@@ -5816,6 +5816,8 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
 					     elems->scratch + elems->scratch_len -
 					     elems->scratch_pos,
 					     WLAN_EID_FRAGMENT);
+	if (ml_len < 0)
+		return;
 
 	elems->ml_reconf = (const void *)elems->scratch_pos;
 	elems->ml_reconf_len = ml_len;
-- 
2.34.1

[PATCH 13/14] wifi: mac80211: mesh_plink: fix matches_local logic

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

During refactoring the "else" here got lost, add it back.

Fixes: c99a89edb106 ("mac80211: factor out plink event gathering")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/mesh_plink.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index dbabeefe4515..efffde7e5695 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -1068,8 +1068,8 @@ mesh_plink_get_event(struct ieee80211_sub_if_data *sdata,
 	case WLAN_SP_MESH_PEERING_OPEN:
 		if (!matches_local)
 			event = OPN_RJCT;
-		if (!mesh_plink_free_count(sdata) ||
-		    (sta->mesh->plid && sta->mesh->plid != plid))
+		else if (!mesh_plink_free_count(sdata) ||
+			 (sta->mesh->plid && sta->mesh->plid != plid))
 			event = OPN_IGNR;
 		else
 			event = OPN_ACPT;
@@ -1077,9 +1077,9 @@ mesh_plink_get_event(struct ieee80211_sub_if_data *sdata,
 	case WLAN_SP_MESH_PEERING_CONFIRM:
 		if (!matches_local)
 			event = CNF_RJCT;
-		if (!mesh_plink_free_count(sdata) ||
-		    sta->mesh->llid != llid ||
-		    (sta->mesh->plid && sta->mesh->plid != plid))
+		else if (!mesh_plink_free_count(sdata) ||
+			 sta->mesh->llid != llid ||
+			 (sta->mesh->plid && sta->mesh->plid != plid))
 			event = CNF_IGNR;
 		else
 			event = CNF_ACPT;
-- 
2.34.1

[PATCH 14/14] wifi: mac80211: mesh: check element parsing succeeded

[Miri Korenblit]

From: Johannes Berg <johannes.berg@intel.com>

ieee802_11_parse_elems() can return NULL, so we must
check for the return value.

Fixes: 5d24828d05f3 ("mac80211: always allocate struct ieee802_11_elems")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/mesh_plink.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index efffde7e5695..28bf794f67f8 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -1247,6 +1247,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
 			return;
 	}
 	elems = ieee802_11_parse_elems(baseaddr, len - baselen, true, NULL);
-	mesh_process_plink_frame(sdata, mgmt, elems, rx_status);
-	kfree(elems);
+	if (elems) {
+		mesh_process_plink_frame(sdata, mgmt, elems, rx_status);
+		kfree(elems);
+	}
 }
-- 
2.34.1