Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking changes from David Miller:

 1) Get rid of the error prone NLA_PUT*() macros that used an embedded
    goto.

 2) Kill off the token-ring and MCA networking drivers, from Paul
    Gortmaker.

 3) Reduce high-order allocations made by datagram AF_UNIX sockets, from
    Eric Dumazet.

 4) Add PTP hardware clock support to IGB and IXGBE, from Richard
    Cochran and Jacob Keller.

 5) Allow users to query timestamping capabilities of a card via
    ethtool, from Richard Cochran.

 6) Add loadbalance mode to the teaming driver, from Jiri Pirko.  Part
    of this is that we can now have BPF filters not attached to sockets,
    and the loadbalancing function is calculated using one.

 7) Francois Romieu went through the network drivers removing gratuitous
    uses of netdev->base_addr, perhaps some day we can remove it
    completely but it's used for ISA probing still.

 8) Add a BPF JIT for sparc.  I know, who cares, right? :-)

 9) Move networking sysctl registry away from using the compatability
    mode interfaces in the sysctl code.  From Eric W Biederman.

10) Pavel Emelyanov added a way to save and restore TCP socket state via
    TCP_REPAIR, TCP_REPAIR_QUEUE, and TCP_QUEUE_SEQ socket options as
    well as a way to forcefully bind a socket to a port via the
    sk->sk_reuse value SK_FORCE_REUSE.  There is also a
    TCP_REPAIR_OPTIONS which allows to reinstante the TCP options
    enabled on the connection.

11) Several enhancements from Eric Dumazet that, in particular, can
    enhance splice performance on TCP sockets significantly.

     a) Reset the offset of the per-socket sendmsg page when we know
        we're the only use of the page in linear_to_page().

     b) Add facilities such that skb->data can be backed a page rather
        than SLAB kmalloc'd memory.  In particular devices which were
        receiving into linear RX buffers can now end up providing paged
        data.

    The big result is that code like splice and GRO do not have to copy
    any more.

12) Allow a pure sender to more gracefully handle ACK backlogs in TCP.
    What can happen at high rates is that the sender hasn't grown his
    receive buffer limits at all (he's not receiving data so really
    doesn't need to), but the non-data ACKs consume receive buffer
    space.

    sk_add_backlog() is too aggressive in dropping frames in this case,
    so relax it's requirements by using the receive buffer plus the send
    buffer limit as the backlog limit instead of just the former.

    Also from Eric Dumazet.

13) Add ipv6 support to L2TP, from Benjamin LaHaise, James Chapman, and
    Chris Elston.

14) Implement TCP early retransmit (RFC 5827), from Yuchung Cheng.
    Basically, we can start fast retransmit before hiting the dupack
    threshold under certain conditions.

15) New CODEL active queue management packet scheduler, from Eric
    Dumazet based upon initial work by Dave Taht.

    Basically, the big feature is that packets are dropped (or ECN bits
    are set) based upon how long packets live in the queue, rather than
    the queue length (which is what RED uses).

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1341 commits)
  drivers/net/stmmac: seq_file fix memory leak
  ipv6/exthdrs: strict Pad1 and PadN check
  USB: qmi_wwan: Add ZTE (Vodafone) K3520-Z
  USB: qmi_wwan: Add ZTE (Vodafone) K3765-Z
  USB: qmi_wwan: Make forced int 4 whitelist generic
  net/ipv4: replace simple_strtoul with kstrtoul
  net/ipv4/ipconfig: neaten __setup placement
  net: qmi_wwan: Add Vodafone/Huawei K5005 support
  net: cdc_ether: Add ZTE WWAN matches before generic Ethernet
  ipv6: use skb coalescing in reassembly
  ipv4: use skb coalescing in defragmentation
  net: introduce skb_try_coalesce()
  net:ipv6:fixed space issues relating to operators.
  net:ipv6:fixed a trailing white space issue.
  ipv6: disable GSO on sockets hitting dst_allfrag
  tg3: use netdev_alloc_frag() API
  net: napi_frags_skb() is static
  ppp: avoid false drop_monitor false positives
  ipv6: bool/const conversions phase2
  ipx: Remove spurious NULL checking in ipx_ioctl().
  ...

1 files changed, 160 insertions, 12 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index c20051b7ffc..856237c5c1f 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -127,7 +127,7 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
 			 * The remaining checks are only performed for interfaces
 			 * with the same MAC address.
 			 */
-			if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
+			if (!ether_addr_equal(dev->dev_addr, ndev->dev_addr))
 				continue;
 
 			/*
@@ -149,6 +149,35 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
 	return 0;
 }
 
+static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
+{
+	int n_queues = sdata->local->hw.queues;
+	int i;
+
+	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+		if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
+				 IEEE80211_INVAL_HW_QUEUE))
+			return -EINVAL;
+		if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
+				 n_queues))
+			return -EINVAL;
+	}
+
+	if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
+	    !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
+		sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
+		return 0;
+	}
+
+	if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
+		return -EINVAL;
+
+	if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
+		return -EINVAL;
+
+	return 0;
+}
+
 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
 				    const int offset)
 {
@@ -169,6 +198,81 @@ void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
 #undef ADJUST
 }
 
+static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	int i;
+
+	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+		if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
+			sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
+		else
+			sdata->vif.hw_queue[i] = i;
+	}
+	sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
+}
+
+static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+	int ret;
+
+	if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
+		return 0;
+
+	if (local->monitor_sdata)
+		return 0;
+
+	sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
+	if (!sdata)
+		return -ENOMEM;
+
+	/* set up data */
+	sdata->local = local;
+	sdata->vif.type = NL80211_IFTYPE_MONITOR;
+	snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
+		 wiphy_name(local->hw.wiphy));
+
+	ieee80211_set_default_queues(sdata);
+
+	ret = drv_add_interface(local, sdata);
+	if (WARN_ON(ret)) {
+		/* ok .. stupid driver, it asked for this! */
+		kfree(sdata);
+		return ret;
+	}
+
+	ret = ieee80211_check_queues(sdata);
+	if (ret) {
+		kfree(sdata);
+		return ret;
+	}
+
+	rcu_assign_pointer(local->monitor_sdata, sdata);
+
+	return 0;
+}
+
+static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
+		return;
+
+	sdata = rtnl_dereference(local->monitor_sdata);
+
+	if (!sdata)
+		return;
+
+	rcu_assign_pointer(local->monitor_sdata, NULL);
+	synchronize_net();
+
+	drv_remove_interface(local, sdata);
+
+	kfree(sdata);
+}
+
 /*
  * NOTE: Be very careful when changing this function, it must NOT return
  * an error on interface type changes that have been pre-checked, so most
@@ -246,15 +350,18 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
 		memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
 
 		if (!is_valid_ether_addr(dev->dev_addr)) {
-			if (!local->open_count)
-				drv_stop(local);
-			return -EADDRNOTAVAIL;
+			res = -EADDRNOTAVAIL;
+			goto err_stop;
 		}
 	}
 
 	switch (sdata->vif.type) {
 	case NL80211_IFTYPE_AP_VLAN:
-		/* no need to tell driver */
+		/* no need to tell driver, but set carrier */
+		if (rtnl_dereference(sdata->bss->beacon))
+			netif_carrier_on(dev);
+		else
+			netif_carrier_off(dev);
 		break;
 	case NL80211_IFTYPE_MONITOR:
 		if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
@@ -262,6 +369,12 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
 			break;
 		}
 
+		if (local->monitors == 0 && local->open_count == 0) {
+			res = ieee80211_add_virtual_monitor(local);
+			if (res)
+				goto err_stop;
+		}
+
 		/* must be before the call to ieee80211_configure_filter */
 		local->monitors++;
 		if (local->monitors == 1) {
@@ -276,9 +389,14 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
 		break;
 	default:
 		if (coming_up) {
+			ieee80211_del_virtual_monitor(local);
+
 			res = drv_add_interface(local, sdata);
 			if (res)
 				goto err_stop;
+			res = ieee80211_check_queues(sdata);
+			if (res)
+				goto err_del_interface;
 		}
 
 		if (sdata->vif.type == NL80211_IFTYPE_AP) {
@@ -294,7 +412,8 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
 		ieee80211_bss_info_change_notify(sdata, changed);
 
 		if (sdata->vif.type == NL80211_IFTYPE_STATION ||
-		    sdata->vif.type == NL80211_IFTYPE_ADHOC)
+		    sdata->vif.type == NL80211_IFTYPE_ADHOC ||
+		    sdata->vif.type == NL80211_IFTYPE_AP)
 			netif_carrier_off(dev);
 		else
 			netif_carrier_on(dev);
@@ -366,6 +485,7 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
 	sdata->bss = NULL;
 	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 		list_del(&sdata->u.vlan.list);
+	/* might already be clear but that doesn't matter */
 	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 	return res;
 }
@@ -508,6 +628,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 		if (local->monitors == 0) {
 			local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
 			hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+			ieee80211_del_virtual_monitor(local);
 		}
 
 		ieee80211_adjust_monitor_flags(sdata, -1);
@@ -581,6 +702,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 		}
 	}
 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+	if (local->monitors == local->open_count && local->monitors > 0)
+		ieee80211_add_virtual_monitor(local);
 }
 
 static int ieee80211_stop(struct net_device *dev)
@@ -676,7 +800,7 @@ static u16 ieee80211_monitor_select_queue(struct net_device *dev,
 	struct ieee80211_hdr *hdr;
 	struct ieee80211_radiotap_header *rtap = (void *)skb->data;
 
-	if (local->hw.queues < 4)
+	if (local->hw.queues < IEEE80211_NUM_ACS)
 		return 0;
 
 	if (skb->len < 4 ||
@@ -907,6 +1031,18 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 	ieee80211_debugfs_add_netdev(sdata);
 }
 
+static void ieee80211_clean_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_MESH_POINT:
+		mesh_path_flush_by_iface(sdata);
+		break;
+
+	default:
+		break;
+	}
+}
+
 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 					   enum nl80211_iftype type)
 {
@@ -970,6 +1106,13 @@ static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 	if (ret)
 		type = sdata->vif.type;
 
+	/*
+	 * Ignore return value here, there's not much we can do since
+	 * the driver changed the interface type internally already.
+	 * The warnings will hopefully make driver authors fix it :-)
+	 */
+	ieee80211_check_queues(sdata);
+
 	ieee80211_setup_sdata(sdata, type);
 
 	err = ieee80211_do_open(sdata->dev, false);
@@ -1133,11 +1276,15 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 	struct net_device *ndev;
 	struct ieee80211_sub_if_data *sdata = NULL;
 	int ret, i;
+	int txqs = 1;
 
 	ASSERT_RTNL();
 
+	if (local->hw.queues >= IEEE80211_NUM_ACS)
+		txqs = IEEE80211_NUM_ACS;
+
 	ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
-				name, ieee80211_if_setup, local->hw.queues, 1);
+				name, ieee80211_if_setup, txqs, 1);
 	if (!ndev)
 		return -ENOMEM;
 	dev_net_set(ndev, wiphy_net(local->hw.wiphy));
@@ -1192,6 +1339,8 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 			       sizeof(sdata->rc_rateidx_mcs_mask[i]));
 	}
 
+	ieee80211_set_default_queues(sdata);
+
 	/* setup type-dependent data */
 	ieee80211_setup_sdata(sdata, type);
 
@@ -1227,8 +1376,8 @@ void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
 	list_del_rcu(&sdata->list);
 	mutex_unlock(&sdata->local->iflist_mtx);
 
-	if (ieee80211_vif_is_mesh(&sdata->vif))
-		mesh_path_flush_by_iface(sdata);
+	/* clean up type-dependent data */
+	ieee80211_clean_sdata(sdata);
 
 	synchronize_rcu();
 	unregister_netdevice(sdata->dev);
@@ -1249,8 +1398,7 @@ void ieee80211_remove_interfaces(struct ieee80211_local *local)
 	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 		list_del(&sdata->list);
 
-		if (ieee80211_vif_is_mesh(&sdata->vif))
-			mesh_path_flush_by_iface(sdata);
+		ieee80211_clean_sdata(sdata);
 
 		unregister_netdevice_queue(sdata->dev, &unreg_list);
 	}