Commit cd8f7cb4 authored by Johannes Berg's avatar Johannes Berg
Browse files

cfg80211/mac80211: support reporting wakeup reason 



When waking up from WoWLAN, it is useful to know
what triggered the wakeup. Support reporting the
wakeup reason(s) in cfg80211 (and a pass-through
in mac80211) to allow userspace to know.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 3b144658

include/net/cfg80211.h

+41 −0
Original line number Diff line number Diff line
@@ -1596,6 +1596,32 @@ struct cfg80211_wowlan { 
	int n_patterns;

};



/**

 * struct cfg80211_wowlan_wakeup - wakeup report

 * @disconnect: woke up by getting disconnected

 * @magic_pkt: woke up by receiving magic packet

 * @gtk_rekey_failure: woke up by GTK rekey failure

 * @eap_identity_req: woke up by EAP identity request packet

 * @four_way_handshake: woke up by 4-way handshake

 * @rfkill_release: woke up by rfkill being released

 * @pattern_idx: pattern that caused wakeup, -1 if not due to pattern

 * @packet_present_len: copied wakeup packet data

 * @packet_len: original wakeup packet length

 * @packet: The packet causing the wakeup, if any.

 * @packet_80211:  For pattern match, magic packet and other data

 *	frame triggers an 802.3 frame should be reported, for

 *	disconnect due to deauth 802.11 frame. This indicates which

 *	it is.

 */

struct cfg80211_wowlan_wakeup {

	bool disconnect, magic_pkt, gtk_rekey_failure,

	     eap_identity_req, four_way_handshake,

	     rfkill_release, packet_80211;

	s32 pattern_idx;

	u32 packet_present_len, packet_len;

	const void *packet;

};



/**

 * struct cfg80211_gtk_rekey_data - rekey data

 * @kek: key encryption key
@@ -3852,6 +3878,21 @@ int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, 
			  enum ieee80211_p2p_attr_id attr,

			  u8 *buf, unsigned int bufsize);



/**

 * cfg80211_report_wowlan_wakeup - report wakeup from WoWLAN

 * @wdev: the wireless device reporting the wakeup

 * @wakeup: the wakeup report

 * @gfp: allocation flags

 *

 * This function reports that the given device woke up. If it

 * caused the wakeup, report the reason(s), otherwise you may

 * pass %NULL as the @wakeup parameter to advertise that something

 * else caused the wakeup.

 */

void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,

				   struct cfg80211_wowlan_wakeup *wakeup,

				   gfp_t gfp);



/* Logging, debugging and troubleshooting/diagnostic helpers. */



/* wiphy_printk helpers, similar to dev_printk */

include/net/mac80211.h

+12 −0
Original line number Diff line number Diff line
@@ -4206,4 +4206,16 @@ void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 
 */

int ieee80211_ave_rssi(struct ieee80211_vif *vif);



/**

 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup

 * @vif: virtual interface

 * @wakeup: wakeup reason(s)

 * @gfp: allocation flags

 *

 * See cfg80211_report_wowlan_wakeup().

 */

void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,

				    struct cfg80211_wowlan_wakeup *wakeup,

				    gfp_t gfp);



#endif /* MAC80211_H */

include/uapi/linux/nl80211.h

+31 −0
Original line number Diff line number Diff line
@@ -513,6 +513,12 @@ 
 *	command with the %NL80211_ATTR_WOWLAN_TRIGGERS attribute. For

 *	more background information, see

 *	http://wireless.kernel.org/en/users/Documentation/WoWLAN.

 *	The @NL80211_CMD_SET_WOWLAN command can also be used as a notification

 *	from the driver reporting the wakeup reason. In this case, the

 *	@NL80211_ATTR_WOWLAN_TRIGGERS attribute will contain the reason

 *	for the wakeup, if it was caused by wireless. If it is not present

 *	in the wakeup notification, the wireless device didn't cause the

 *	wakeup but reports that it was woken up.

 *

 * @NL80211_CMD_SET_REKEY_OFFLOAD: This command is used give the driver

 *	the necessary information for supporting GTK rekey offload. This
@@ -2947,6 +2953,10 @@ struct nl80211_wowlan_pattern_support { 
 *

 *	In %NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED, it is a binary attribute

 *	carrying a &struct nl80211_wowlan_pattern_support.

 *

 *	When reporting wakeup. it is a u32 attribute containing the 0-based

 *	index of the pattern that caused the wakeup, in the patterns passed

 *	to the kernel when configuring.

 * @NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED: Not a real trigger, and cannot be

 *	used when setting, used only to indicate that GTK rekeying is supported

 *	by the device (flag)
@@ -2957,8 +2967,25 @@ struct nl80211_wowlan_pattern_support { 
 * @NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE: wake up on 4-way handshake (flag)

 * @NL80211_WOWLAN_TRIG_RFKILL_RELEASE: wake up when rfkill is released

 *	(on devices that have rfkill in the device) (flag)

 * @NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211: For wakeup reporting only, contains

 *	the 802.11 packet that caused the wakeup, e.g. a deauth frame. The frame

 *	may be truncated, the @NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN

 *	attribute contains the original length.

 * @NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN: Original length of the 802.11

 *	packet, may be bigger than the @NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211

 *	attribute if the packet was truncated somewhere.

 * @NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023: For wakeup reporting only, contains the

 *	802.11 packet that caused the wakeup, e.g. a magic packet. The frame may

 *	be truncated, the @NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN attribute

 *	contains the original length.

 * @NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN: Original length of the 802.3

 *	packet, may be bigger than the @NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023

 *	attribute if the packet was truncated somewhere.

 * @NUM_NL80211_WOWLAN_TRIG: number of wake on wireless triggers

 * @MAX_NL80211_WOWLAN_TRIG: highest wowlan trigger attribute number

 *

 * These nested attributes are used to configure the wakeup triggers and

 * to report the wakeup reason(s).

 */

enum nl80211_wowlan_triggers {

	__NL80211_WOWLAN_TRIG_INVALID,
@@ -2971,6 +2998,10 @@ enum nl80211_wowlan_triggers { 
	NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST,

	NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE,

	NL80211_WOWLAN_TRIG_RFKILL_RELEASE,

	NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211,

	NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN,

	NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023,

	NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN,



	/* keep last */

	NUM_NL80211_WOWLAN_TRIG,

net/mac80211/pm.c

+10 −0
Original line number Diff line number Diff line
@@ -228,3 +228,13 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) 
 * ieee80211_reconfig(), which is also needed for hardware

 * hang/firmware failure/etc. recovery.

 */



void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,

				    struct cfg80211_wowlan_wakeup *wakeup,

				    gfp_t gfp)

{

	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);



	cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);

}

EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);

net/wireless/nl80211.c

+97 −0
Original line number Diff line number Diff line
@@ -9323,6 +9323,103 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy, 
}

EXPORT_SYMBOL(cfg80211_report_obss_beacon);



#ifdef CONFIG_PM

void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,

				   struct cfg80211_wowlan_wakeup *wakeup,

				   gfp_t gfp)

{

	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);

	struct sk_buff *msg;

	void *hdr;

	int err, size = 200;



	trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);



	if (wakeup)

		size += wakeup->packet_present_len;



	msg = nlmsg_new(size, gfp);

	if (!msg)

		return;



	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);

	if (!hdr)

		goto free_msg;



	if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||

	    nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))

		goto free_msg;



	if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,

					wdev->netdev->ifindex))

		goto free_msg;



	if (wakeup) {

		struct nlattr *reasons;



		reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);



		if (wakeup->disconnect &&

		    nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))

			goto free_msg;

		if (wakeup->magic_pkt &&

		    nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))

			goto free_msg;

		if (wakeup->gtk_rekey_failure &&

		    nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))

			goto free_msg;

		if (wakeup->eap_identity_req &&

		    nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))

			goto free_msg;

		if (wakeup->four_way_handshake &&

		    nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))

			goto free_msg;

		if (wakeup->rfkill_release &&

		    nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))

			goto free_msg;



		if (wakeup->pattern_idx >= 0 &&

		    nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,

				wakeup->pattern_idx))

			goto free_msg;



		if (wakeup->packet) {

			u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;

			u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;



			if (!wakeup->packet_80211) {

				pkt_attr =

					NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;

				len_attr =

					NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;

			}



			if (wakeup->packet_len &&

			    nla_put_u32(msg, len_attr, wakeup->packet_len))

				goto free_msg;



			if (nla_put(msg, pkt_attr, wakeup->packet_present_len,

				    wakeup->packet))

				goto free_msg;

		}



		nla_nest_end(msg, reasons);

	}



	err = genlmsg_end(msg, hdr);

	if (err < 0)

		goto free_msg;



	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,

				nl80211_mlme_mcgrp.id, gfp);

	return;



 free_msg:

	nlmsg_free(msg);

}

EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);

#endif



void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,

				enum nl80211_tdls_operation oper,

				u16 reason_code, gfp_t gfp)

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