[PATCHv3 0/3] add NoAck per tid support

[PATCHv3 0/3] add NoAck per tid support

[Simon Wunderlich]

This patch adds support for NoAck per WMM Queue. The Unicast QoS
Header is adapted accordingly for each outgoing frame.
The NoAck policy for the individual queues is turned and off through
a tid bitmap with nl80211 commands.

I have tested this feature on ath9k as well as ath5k devices. There is
an iw patch as well to make use of this feature.

It should apply well on the latest wireless-testing kernel.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>

---
Changes to PATCH:

consider NO_ACK flag when calculating duration
check if set_txq_noack op is implemented before calling it

Changes to PATCHv2:

change from TXQ_PARAM enhancement to separate command. This should be
more clean and enables more configuration options.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>

Simon Wunderlich (3):
  mac80211: remove debugfs noack test
  wireless: Add NoAck per tid Support
  mac80211: Add NoAck per tid Support

 include/linux/nl80211.h    |   10 ++++++++++
 include/net/cfg80211.h     |    6 ++++++
 net/mac80211/cfg.c         |   11 +++++++++++
 net/mac80211/debugfs.c     |   35 -----------------------------------
 net/mac80211/ieee80211_i.h |    4 +++-
 net/mac80211/iface.c       |    2 ++
 net/mac80211/tx.c          |   10 +---------
 net/mac80211/wme.c         |    8 ++++++--
 net/wireless/nl80211.c     |   28 ++++++++++++++++++++++++++++
 9 files changed, 67 insertions(+), 47 deletions(-)

-- 
1.7.7.3

[PATCHv3 1/3] mac80211: remove debugfs noack test

[Simon Wunderlich]

This feature has been superseded by the NoAck per Queue feature.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
---
 net/mac80211/debugfs.c     |   35 -----------------------------------
 net/mac80211/ieee80211_i.h |    1 -
 net/mac80211/tx.c          |   10 +---------
 net/mac80211/wme.c         |    3 +--
 4 files changed, 2 insertions(+), 47 deletions(-)

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 00cefcb..90baea5 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -97,40 +97,6 @@ static const struct file_operations reset_ops = {
 	.llseek = noop_llseek,
 };
 
-static ssize_t noack_read(struct file *file, char __user *user_buf,
-			  size_t count, loff_t *ppos)
-{
-	struct ieee80211_local *local = file->private_data;
-
-	return mac80211_format_buffer(user_buf, count, ppos, "%d\n",
-				      local->wifi_wme_noack_test);
-}
-
-static ssize_t noack_write(struct file *file,
-			   const char __user *user_buf,
-			   size_t count, loff_t *ppos)
-{
-	struct ieee80211_local *local = file->private_data;
-	char buf[10];
-	size_t len;
-
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-	buf[len] = '\0';
-
-	local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
-
-	return count;
-}
-
-static const struct file_operations noack_ops = {
-	.read = noack_read,
-	.write = noack_write,
-	.open = mac80211_open_file_generic,
-	.llseek = default_llseek,
-};
-
 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 				 size_t count, loff_t *ppos)
 {
@@ -398,7 +364,6 @@ void debugfs_hw_add(struct ieee80211_local *local)
 	DEBUGFS_ADD(wep_iv);
 	DEBUGFS_ADD(queues);
 	DEBUGFS_ADD_MODE(reset, 0200);
-	DEBUGFS_ADD(noack);
 	DEBUGFS_ADD(uapsd_queues);
 	DEBUGFS_ADD(uapsd_max_sp_len);
 	DEBUGFS_ADD(channel_type);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 068cc92..5c62579 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -957,7 +957,6 @@ struct ieee80211_local {
 	int total_ps_buffered; /* total number of all buffered unicast and
 				* multicast packets for power saving stations
 				*/
-	int wifi_wme_noack_test;
 	unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 
 	/*
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 30d212a..f632690 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1150,16 +1150,8 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
 	if (is_multicast_ether_addr(hdr->addr1)) {
 		tx->flags &= ~IEEE80211_TX_UNICAST;
 		info->flags |= IEEE80211_TX_CTL_NO_ACK;
-	} else {
+	} else
 		tx->flags |= IEEE80211_TX_UNICAST;
-		if (unlikely(local->wifi_wme_noack_test))
-			info->flags |= IEEE80211_TX_CTL_NO_ACK;
-		/*
-		 * Flags are initialized to 0. Hence, no need to
-		 * explicitly unset IEEE80211_TX_CTL_NO_ACK since
-		 * it might already be set for injected frames.
-		 */
-	}
 
 	if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
 		if (!(tx->flags & IEEE80211_TX_UNICAST) ||
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 4332711..74b3d10 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -150,8 +150,7 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
 		/* preserve EOSP bit */
 		ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
 
-		if (unlikely(sdata->local->wifi_wme_noack_test) ||
-		    is_multicast_ether_addr(hdr->addr1))
+		if (is_multicast_ether_addr(hdr->addr1))
 			ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
 		/* qos header is 2 bytes */
 		*p++ = ack_policy | tid;
-- 
1.7.7.3

[PATCHv3 2/3] wireless: Add NoAck per tid Support

[Simon Wunderlich]

This patch contains the configuration changes in nl80211/cfg80211.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
---
 include/linux/nl80211.h |   10 ++++++++++
 include/net/cfg80211.h  |    6 ++++++
 net/wireless/nl80211.c  |   28 ++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index f9261c2..b99e50d 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -538,6 +538,9 @@
  *	OLBC handling in hostapd. Beacons are reported in %NL80211_CMD_FRAME
  *	messages. Note that per PHY only one application may register.
  *
+ * @NL80211_CMD_SET_NOACK_MAP: sets a bitmap for the individual TIDs whether
+ *      No Acknowledgement Policy should be applied.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -675,6 +678,8 @@ enum nl80211_commands {
 
 	NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
 
+	NL80211_CMD_SET_NOACK_MAP,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -1170,6 +1175,9 @@ enum nl80211_commands {
  *	probe-response frame. The DA field in the 802.11 header is zero-ed out,
  *	to be filled by the FW.
  *
+ * @NL80211_ATTR_NOACK_MAP: This u16 bitmap contains the No Ack Policy of
+ *      up to 16 TIDs.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1408,6 +1416,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_PROBE_RESP,
 
+	NL80211_ATTR_NOACK_MAP,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 8d7ba09..2720f2e 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1442,6 +1442,8 @@ struct cfg80211_gtk_rekey_data {
  *
  * @probe_client: probe an associated client, must return a cookie that it
  *	later passes to cfg80211_probe_status().
+ *
+ * @set_noack_map: Set the NoAck Map for the TIDs.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -1635,6 +1637,10 @@ struct cfg80211_ops {
 	int	(*probe_client)(struct wiphy *wiphy, struct net_device *dev,
 				const u8 *peer, u64 *cookie);
 
+	int	(*set_noack_map)(struct wiphy *wiphy,
+				  struct net_device *dev,
+				  u16 noack_map);
+
 	struct ieee80211_channel *(*get_channel)(struct wiphy *wiphy);
 };
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 6bc7c4b..a0c2c13 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -199,6 +199,8 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 	[NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 	[NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 				      .len = IEEE80211_MAX_DATA_LEN },
+	[NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
+
 };
 
 /* policy for the key attributes */
@@ -1743,6 +1745,23 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
 	return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
 }
 
+static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev = info->user_ptr[0];
+	struct net_device *dev = info->user_ptr[1];
+	u16 noack_map;
+
+	if (!info->attrs[NL80211_ATTR_NOACK_MAP])
+		return -EINVAL;
+
+	if (!rdev->ops->set_noack_map)
+		return -EOPNOTSUPP;
+
+	noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
+
+	return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
+}
+
 struct get_key_cookie {
 	struct sk_buff *msg;
 	int error;
@@ -6529,6 +6548,15 @@ static struct genl_ops nl80211_ops[] = {
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
+	{
+		.cmd = NL80211_CMD_SET_NOACK_MAP,
+		.doit = nl80211_set_noack_map,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = NL80211_FLAG_NEED_NETDEV |
+				  NL80211_FLAG_NEED_RTNL,
+	},
+
 };
 
 static struct genl_multicast_group nl80211_mlme_mcgrp = {
-- 
1.7.7.3

Re: [PATCHv3 2/3] wireless: Add NoAck per tid Support

[Johannes Berg]

On Fri, 2011-11-18 at 12:01 +0100, Simon Wunderlich wrote:

> + * @NL80211_CMD_SET_NOACK_MAP: sets a bitmap for the individual TIDs whether
> + *      No Acknowledgement Policy should be applied.
> + *

Please advertise this in nl80211_send_wiphy().

Otherwise looks good to me, much easier to understand than before :-)

johannes

[PATCHv3 3/3] mac80211: Add NoAck per tid Support

[Simon Wunderlich]

This patch contains the processing changes in mac80211.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
---
 net/mac80211/cfg.c         |   11 +++++++++++
 net/mac80211/ieee80211_i.h |    3 +++
 net/mac80211/iface.c       |    2 ++
 net/mac80211/wme.c         |    7 ++++++-
 4 files changed, 22 insertions(+), 1 deletions(-)

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 1063a7e..e1a8d89 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -102,6 +102,16 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
 	return 0;
 }
 
+static int ieee80211_set_noack_map(struct wiphy *wiphy,
+				  struct net_device *dev,
+				  u16 noack_map)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	sdata->noack_map = noack_map;
+	return 0;
+}
+
 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 			     u8 key_idx, bool pairwise, const u8 *mac_addr,
 			     struct key_params *params)
@@ -2698,4 +2708,5 @@ struct cfg80211_ops mac80211_config_ops = {
 	.tdls_mgmt = ieee80211_tdls_mgmt,
 	.probe_client = ieee80211_probe_client,
 	.get_channel = ieee80211_wiphy_get_channel,
+	.set_noack_map = ieee80211_set_noack_map,
 };
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 5c62579..e93c496 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -607,6 +607,9 @@ struct ieee80211_sub_if_data {
 	struct ieee80211_fragment_entry	fragments[IEEE80211_FRAGMENT_MAX];
 	unsigned int fragment_next;
 
+	/* TID bitmap for NoAck policy */
+	u16 noack_map;
+
 	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 	struct ieee80211_key __rcu *default_unicast_key;
 	struct ieee80211_key __rcu *default_multicast_key;
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b34ca0c..be1d61e 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -866,6 +866,8 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 	sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
 	sdata->control_port_no_encrypt = false;
 
+	sdata->noack_map = 0;
+
 	/* only monitor differs */
 	sdata->dev->type = ARPHRD_ETHER;
 
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 74b3d10..9933590 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -139,6 +139,7 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
 			   struct sk_buff *skb)
 {
 	struct ieee80211_hdr *hdr = (void *)skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
 	/* Fill in the QoS header if there is one. */
 	if (ieee80211_is_data_qos(hdr->frame_control)) {
@@ -150,8 +151,12 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
 		/* preserve EOSP bit */
 		ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
 
-		if (is_multicast_ether_addr(hdr->addr1))
+		if (is_multicast_ether_addr(hdr->addr1) ||
+			(sdata->noack_map & 1 << tid)) {
 			ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
+			info->flags |= IEEE80211_TX_CTL_NO_ACK;
+		}
+
 		/* qos header is 2 bytes */
 		*p++ = ack_policy | tid;
 		*p = ieee80211_vif_is_mesh(&sdata->vif) ?
-- 
1.7.7.3

Re: [PATCHv3 3/3] mac80211: Add NoAck per tid Support

[Johannes Berg]

On Fri, 2011-11-18 at 12:01 +0100, Simon Wunderlich wrote:

> -		if (is_multicast_ether_addr(hdr->addr1))
> +		if (is_multicast_ether_addr(hdr->addr1) ||
> +			(sdata->noack_map & 1 << tid)) {

I'd prefer this:

		if (is_multicast_ether_addr(...) ||
		    sdata->noack_map & BIT(tid))

(Note indentation & use of BIT())

Isn't this missing an update to ieee80211_duration() now?

johannes

Re: [PATCHv3 3/3] mac80211: Add NoAck per tid Support

[Simon Wunderlich]

[-- Attachment #1: Type: text/plain, Size: 740 bytes --]

On Fri, Nov 18, 2011 at 12:12:24PM +0100, Johannes Berg wrote:
> On Fri, 2011-11-18 at 12:01 +0100, Simon Wunderlich wrote:
> 
> > -		if (is_multicast_ether_addr(hdr->addr1))
> > +		if (is_multicast_ether_addr(hdr->addr1) ||
> > +			(sdata->noack_map & 1 << tid)) {
> 
> I'd prefer this:
> 
> 		if (is_multicast_ether_addr(...) ||
> 		    sdata->noack_map & BIT(tid))
> 
> (Note indentation & use of BIT())

OK

> 
> Isn't this missing an update to ieee80211_duration() now?

Yep, I silently dropped that modification - I rather don't mess with stuff I
don't completly understand. Keeping the duration too long shouldn't hurt
(only performance), having it too short will have much worse effects ...

Thanks,
	Simon

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Re: [PATCHv3 3/3] mac80211: Add NoAck per tid Support

[Kalle Valo]

Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> writes:

>> Isn't this missing an update to ieee80211_duration() now?
>
> Yep, I silently dropped that modification - I rather don't mess with stuff I
> don't completly understand. Keeping the duration too long shouldn't hurt
> (only performance), having it too short will have much worse effects ...

Still a comment in the function about this issue would be nice. Just to
make sure that it's not forgotten.

-- 
Kalle Valo

Re: [PATCHv3 3/3] mac80211: Add NoAck per tid Support

[Johannes Berg]

On Mon, 2011-11-21 at 19:20 +0200, Kalle Valo wrote:
> Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> writes:
> 
> >> Isn't this missing an update to ieee80211_duration() now?
> >
> > Yep, I silently dropped that modification - I rather don't mess with stuff I
> > don't completly understand. Keeping the duration too long shouldn't hurt
> > (only performance), having it too short will have much worse effects ...
> 
> Still a comment in the function about this issue would be nice. Just to
> make sure that it's not forgotten.

I think it should be added back -- it doesn't seem that hard? Just check
if (qos_data && no-ack)? It's on my list but I haven't gotten around ...

johannes

Re: [PATCHv3 3/3] mac80211: Add NoAck per tid Support

[Simon Wunderlich]

[-- Attachment #1: Type: text/plain, Size: 918 bytes --]

On Mon, Nov 21, 2011 at 06:26:33PM +0100, Johannes Berg wrote:
> On Mon, 2011-11-21 at 19:20 +0200, Kalle Valo wrote:
> > Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> writes:
> > 
> > >> Isn't this missing an update to ieee80211_duration() now?
> > >
> > > Yep, I silently dropped that modification - I rather don't mess with stuff I
> > > don't completly understand. Keeping the duration too long shouldn't hurt
> > > (only performance), having it too short will have much worse effects ...
> > 
> > Still a comment in the function about this issue would be nice. Just to
> > make sure that it's not forgotten.
> 
> I think it should be added back -- it doesn't seem that hard? Just check
> if (qos_data && no-ack)? It's on my list but I haven't gotten around ...

Very well, I've sent another patch in reply to the PATCHv4 set - please have
a look at this one.

Thanks
        Simon

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[PATCHv3 1/2] iw: import latest nl80211.h with new commands

[Simon Wunderlich]

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
---
 nl80211.h |  121 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 121 insertions(+), 0 deletions(-)

diff --git a/nl80211.h b/nl80211.h
index 8049bf7..b99e50d 100644
--- a/nl80211.h
+++ b/nl80211.h
@@ -509,6 +509,38 @@
  * @NL80211_CMD_TDLS_OPER: Perform a high-level TDLS command (e.g. link setup).
  * @NL80211_CMD_TDLS_MGMT: Send a TDLS management frame.
  *
+ * @NL80211_CMD_UNEXPECTED_FRAME: Used by an application controlling an AP
+ *	(or GO) interface (i.e. hostapd) to ask for unexpected frames to
+ *	implement sending deauth to stations that send unexpected class 3
+ *	frames. Also used as the event sent by the kernel when such a frame
+ *	is received.
+ *	For the event, the %NL80211_ATTR_MAC attribute carries the TA and
+ *	other attributes like the interface index are present.
+ *	If used as the command it must have an interface index and you can
+ *	only unsubscribe from the event by closing the socket. Subscription
+ *	is also for %NL80211_CMD_UNEXPECTED_4ADDR_FRAME events.
+ *
+ * @NL80211_CMD_UNEXPECTED_4ADDR_FRAME: Sent as an event indicating that the
+ *	associated station identified by %NL80211_ATTR_MAC sent a 4addr frame
+ *	and wasn't already in a 4-addr VLAN. The event will be sent similarly
+ *	to the %NL80211_CMD_UNEXPECTED_FRAME event, to the same listener.
+ *
+ * @NL80211_CMD_PROBE_CLIENT: Probe an associated station on an AP interface
+ *	by sending a null data frame to it and reporting when the frame is
+ *	acknowleged. This is used to allow timing out inactive clients. Uses
+ *	%NL80211_ATTR_IFINDEX and %NL80211_ATTR_MAC. The command returns a
+ *	direct reply with an %NL80211_ATTR_COOKIE that is later used to match
+ *	up the event with the request. The event includes the same data and
+ *	has %NL80211_ATTR_ACK set if the frame was ACKed.
+ *
+ * @NL80211_CMD_REGISTER_BEACONS: Register this socket to receive beacons from
+ *	other BSSes when any interfaces are in AP mode. This helps implement
+ *	OLBC handling in hostapd. Beacons are reported in %NL80211_CMD_FRAME
+ *	messages. Note that per PHY only one application may register.
+ *
+ * @NL80211_CMD_SET_NOACK_MAP: sets a bitmap for the individual TIDs whether
+ *      No Acknowledgement Policy should be applied.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -638,6 +670,16 @@ enum nl80211_commands {
 	NL80211_CMD_TDLS_OPER,
 	NL80211_CMD_TDLS_MGMT,
 
+	NL80211_CMD_UNEXPECTED_FRAME,
+
+	NL80211_CMD_PROBE_CLIENT,
+
+	NL80211_CMD_REGISTER_BEACONS,
+
+	NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
+
+	NL80211_CMD_SET_NOACK_MAP,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -658,6 +700,8 @@ enum nl80211_commands {
 #define NL80211_CMD_DISASSOCIATE NL80211_CMD_DISASSOCIATE
 #define NL80211_CMD_REG_BEACON_HINT NL80211_CMD_REG_BEACON_HINT
 
+#define NL80211_ATTR_FEATURE_FLAGS NL80211_ATTR_FEATURE_FLAGS
+
 /* source-level API compatibility */
 #define NL80211_CMD_GET_MESH_PARAMS NL80211_CMD_GET_MESH_CONFIG
 #define NL80211_CMD_SET_MESH_PARAMS NL80211_CMD_SET_MESH_CONFIG
@@ -1109,6 +1153,31 @@ enum nl80211_commands {
  *	%NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be
  *	used for asking the driver to perform a TDLS operation.
  *
+ * @NL80211_ATTR_DEVICE_AP_SME: This u32 attribute may be listed for devices
+ *	that have AP support to indicate that they have the AP SME integrated
+ *	with support for the features listed in this attribute, see
+ *	&enum nl80211_ap_sme_features.
+ *
+ * @NL80211_ATTR_DONT_WAIT_FOR_ACK: Used with %NL80211_CMD_FRAME, this tells
+ *	the driver to not wait for an acknowledgement. Note that due to this,
+ *	it will also not give a status callback nor return a cookie. This is
+ *	mostly useful for probe responses to save airtime.
+ *
+ * @NL80211_ATTR_FEATURE_FLAGS: This u32 attribute contains flags from
+ *	&enum nl80211_feature_flags and is advertised in wiphy information.
+ * @NL80211_ATTR_PROBE_RESP_OFFLOAD: Indicates that the HW responds to probe
+ *
+ *	requests while operating in AP-mode.
+ *	This attribute holds a bitmap of the supported protocols for
+ *	offloading (see &enum nl80211_probe_resp_offload_support_attr).
+ *
+ * @NL80211_ATTR_PROBE_RESP: Probe Response template data. Contains the entire
+ *	probe-response frame. The DA field in the 802.11 header is zero-ed out,
+ *	to be filled by the FW.
+ *
+ * @NL80211_ATTR_NOACK_MAP: This u16 bitmap contains the No Ack Policy of
+ *      up to 16 TIDs.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1337,6 +1406,18 @@ enum nl80211_attrs {
 	NL80211_ATTR_TDLS_SUPPORT,
 	NL80211_ATTR_TDLS_EXTERNAL_SETUP,
 
+	NL80211_ATTR_DEVICE_AP_SME,
+
+	NL80211_ATTR_DONT_WAIT_FOR_ACK,
+
+	NL80211_ATTR_FEATURE_FLAGS,
+
+	NL80211_ATTR_PROBE_RESP_OFFLOAD,
+
+	NL80211_ATTR_PROBE_RESP,
+
+	NL80211_ATTR_NOACK_MAP,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -1371,6 +1452,7 @@ enum nl80211_attrs {
 #define NL80211_ATTR_AKM_SUITES NL80211_ATTR_AKM_SUITES
 #define NL80211_ATTR_KEY NL80211_ATTR_KEY
 #define NL80211_ATTR_KEYS NL80211_ATTR_KEYS
+#define NL80211_ATTR_FEATURE_FLAGS NL80211_ATTR_FEATURE_FLAGS
 
 #define NL80211_MAX_SUPP_RATES			32
 #define NL80211_MAX_SUPP_REG_RULES		32
@@ -2650,4 +2732,43 @@ enum nl80211_tdls_operation {
 	NL80211_TDLS_DISABLE_LINK,
 };
 
+/*
+ * enum nl80211_ap_sme_features - device-integrated AP features
+ * Reserved for future use, no bits are defined in
+ * NL80211_ATTR_DEVICE_AP_SME yet.
+enum nl80211_ap_sme_features {
+};
+ */
+
+/**
+ * enum nl80211_feature_flags - device/driver features
+ * @NL80211_FEATURE_SK_TX_STATUS: This driver supports reflecting back
+ *	TX status to the socket error queue when requested with the
+ *	socket option.
+ */
+enum nl80211_feature_flags {
+	NL80211_FEATURE_SK_TX_STATUS	= 1 << 0,
+};
+
+/**
+ * enum nl80211_probe_resp_offload_support_attr - optional supported
+ *	protocols for probe-response offloading by the driver/FW.
+ *	To be used with the %NL80211_ATTR_PROBE_RESP_OFFLOAD attribute.
+ *	Each enum value represents a bit in the bitmap of supported
+ *	protocols. Typically a subset of probe-requests belonging to a
+ *	supported protocol will be excluded from offload and uploaded
+ *	to the host.
+ *
+ * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS: Support for WPS ver. 1
+ * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2: Support for WPS ver. 2
+ * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P: Support for P2P
+ * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U: Support for 802.11u
+ */
+enum nl80211_probe_resp_offload_support_attr {
+	NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS =	1<<0,
+	NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 =	1<<1,
+	NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P =	1<<2,
+	NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U =	1<<3,
+};
+
 #endif /* __LINUX_NL80211_H */
-- 
1.7.7.3

[PATCHv3 2/2] iw: add support for NoAck per tid

[Simon Wunderlich]

This adds support for the new NoAck feature in nl80211/mac80211

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
---
 interface.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/interface.c b/interface.c
index 3a345ba..db38b6a 100644
--- a/interface.c
+++ b/interface.c
@@ -386,6 +386,33 @@ COMMAND(set, 4addr, "<on|off>",
 	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_4addr,
 	"Set interface 4addr (WDS) mode.");
 
+static int handle_interface_noack_map(struct nl80211_state *state,
+				      struct nl_cb *cb,
+				      struct nl_msg *msg,
+				      int argc, char **argv)
+{
+	uint16_t noack_map;
+	char *end;
+
+	if (argc != 1)
+		return 1;
+
+	noack_map = strtoul(argv[0], &end, 16);
+	if (end != (argv[0] + strlen(argv[0])))
+		return 1;
+
+	NLA_PUT_U16(msg, NL80211_ATTR_NOACK_MAP, noack_map);
+
+	return 0;
+ nla_put_failure:
+	return -ENOBUFS;
+
+}
+COMMAND(set, noack_map, "<map>",
+	NL80211_CMD_SET_NOACK_MAP, 0, CIB_NETDEV, handle_interface_noack_map,
+	"Set the NoAck map for the TIDs. (0x0001 = BE, 0x000e = BK, 0x0030 = VI, 0x00C0 = VO)");
+
+
 static int handle_interface_wds_peer(struct nl80211_state *state,
 				     struct nl_cb *cb,
 				     struct nl_msg *msg,
-- 
1.7.7.3

Re: [PATCHv3 2/2] iw: add support for NoAck per tid

[Johannes Berg]

On Fri, 2011-11-18 at 12:01 +0100, Simon Wunderlich wrote:

> +static int handle_interface_noack_map(struct nl80211_state *state,
> +				      struct nl_cb *cb,
> +				      struct nl_msg *msg,
> +				      int argc, char **argv)
> +{
> +	uint16_t noack_map;
> +	char *end;
> +
> +	if (argc != 1)
> +		return 1;
> +
> +	noack_map = strtoul(argv[0], &end, 16);
> +	if (end != (argv[0] + strlen(argv[0])))
> +		return 1;

if (*end)
	return 1;

:-)

> +	NLA_PUT_U16(msg, NL80211_ATTR_NOACK_MAP, noack_map);
> +
> +	return 0;
> + nla_put_failure:
> +	return -ENOBUFS;
> +
> +}
> +COMMAND(set, noack_map, "<map>",
> +	NL80211_CMD_SET_NOACK_MAP, 0, CIB_NETDEV, handle_interface_noack_map,
> +	"Set the NoAck map for the TIDs. (0x0001 = BE, 0x000e = BK, 0x0030 = VI, 0x00C0 = VO)");

That doesn't seem right -- BE should be 0x9, BK should be 0x6, no?

johannes

Re: [PATCHv3 2/2] iw: add support for NoAck per tid

[Dave Taht]

Anything that makes it more possible to drop packets when appropriate
makes me happy.

Would there be some way to do this on a per packet basis,
rather than on a per queue basis?

For example, via some sort of dscp map (EF = OK to DROP),
or setsockopt option...
or cgroup...




-- 
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
FR Tel: 0638645374
http://www.bufferbloat.net