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Commit e8f479b1 authored Oct 22, 2014 by Ben Greear Committed by Johannes Berg Oct 27, 2014

cfg80211: support configuring vif mac addr on create



This is useful when creating virtual interfaces.
Keeps udev from mucking with things it shouldn't, since
the default MAC is never seen by udev when specified on
the cmd-line during creation.

Signed-off-by: Ben Greear <greearb@candelatech.com>
[check for feature flag in nl80211 to force drivers to set it]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent 9a0cb89a

include/net/cfg80211.h

+6 −3

Original line number	Original line	Diff line number	Diff line
	@@ -319,9 +319,12 @@ struct ieee80211_supported_band {
	/**		/**
	* struct vif_params - describes virtual interface parameters		* struct vif_params - describes virtual interface parameters
	* @use_4addr: use 4-address frames		* @use_4addr: use 4-address frames
	* @macaddr: address to use for this virtual interface. This will only		* @macaddr: address to use for this virtual interface.
	* be used for non-netdevice interfaces. If this parameter is set		* If this parameter is set to zero address the driver may
	* to zero address the driver may determine the address as needed.		* determine the address as needed.
			* This feature is only fully supported by drivers that enable the
			* %NL80211_FEATURE_MAC_ON_CREATE flag. Others may support creating
			** only p2p devices with specified MAC.
	*/		*/
	struct vif_params {		struct vif_params {
	int use_4addr;		int use_4addr;

include/uapi/linux/nl80211.h

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -4056,6 +4056,9 @@ enum nl80211_ap_sme_features {
	* TSPEC sessions (TID aka TSID 0-7) with the %NL80211_CMD_ADD_TX_TS		* TSPEC sessions (TID aka TSID 0-7) with the %NL80211_CMD_ADD_TX_TS
	* command. Standard IEEE 802.11 TSPEC setup is not yet supported, it		* command. Standard IEEE 802.11 TSPEC setup is not yet supported, it
	* needs to be able to handle Block-Ack agreements and other things.		* needs to be able to handle Block-Ack agreements and other things.
			* @NL80211_FEATURE_MAC_ON_CREATE: Device supports configuring
			* the vif's MAC address upon creation.
			* See 'macaddr' field in the vif_params (cfg80211.h).
	*/		*/
	enum nl80211_feature_flags {		enum nl80211_feature_flags {
	NL80211_FEATURE_SK_TX_STATUS = 1 << 0,		NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
	@@ -4085,6 +4088,7 @@ enum nl80211_feature_flags {
	NL80211_FEATURE_STATIC_SMPS = 1 << 24,		NL80211_FEATURE_STATIC_SMPS = 1 << 24,
	NL80211_FEATURE_DYNAMIC_SMPS = 1 << 25,		NL80211_FEATURE_DYNAMIC_SMPS = 1 << 25,
	NL80211_FEATURE_SUPPORTS_WMM_ADMISSION = 1 << 26,		NL80211_FEATURE_SUPPORTS_WMM_ADMISSION = 1 << 26,
			NL80211_FEATURE_MAC_ON_CREATE = 1 << 27,
	};		};

	/**		/**

net/wireless/nl80211.c

+3 −1

Original line number	Original line	Diff line number	Diff line
	@@ -2605,7 +2605,9 @@ static int nl80211_new_interface(struct sk_buff skb, struct genl_info info)
	!(rdev->wiphy.interface_modes & (1 << type)))		!(rdev->wiphy.interface_modes & (1 << type)))
	return -EOPNOTSUPP;		return -EOPNOTSUPP;

	if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {		if ((type == NL80211_IFTYPE_P2P_DEVICE \|\|
			rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
			info->attrs[NL80211_ATTR_MAC]) {
	nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],		nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
	ETH_ALEN);		ETH_ALEN);
	if (!is_valid_ether_addr(params.macaddr))		if (!is_valid_ether_addr(params.macaddr))

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