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

Pull networking changes from David S Miller:

 1) Remove the ipv4 routing cache.  Now lookups go directly into the FIB
    trie and use prebuilt routes cached there.

    No more garbage collection, no more rDOS attacks on the routing
    cache.  Instead we now get predictable and consistent performance,
    no matter what the pattern of traffic we service.

    This has been almost 2 years in the making.  Special thanks to
    Julian Anastasov, Eric Dumazet, Steffen Klassert, and others who
    have helped along the way.

    I'm sure that with a change of this magnitude there will be some
    kind of fallout, but such things ought the be simple to fix at this
    point.  Luckily I'm not European so I'll be around all of August to
    fix things :-)

    The major stages of this work here are each fronted by a forced
    merge commit whose commit message contains a top-level description
    of the motivations and implementation issues.

 2) Pre-demux of established ipv4 TCP sockets, saves a route demux on
    input.

 3) TCP SYN/ACK performance tweaks from Eric Dumazet.

 4) Add namespace support for netfilter L4 conntrack helpers, from Gao
    Feng.

 5) Add config mechanism for Energy Efficient Ethernet to ethtool, from
    Yuval Mintz.

 6) Remove quadratic behavior from /proc/net/unix, from Eric Dumazet.

 7) Support for connection tracker helpers in userspace, from Pablo
    Neira Ayuso.

 8) Allow userspace driven TX load balancing functions in TEAM driver,
    from Jiri Pirko.

 9) Kill off NLMSG_PUT and RTA_PUT macros, more gross stuff with
    embedded gotos.

10) TCP Small Queues, essentially minimize the amount of TCP data queued
    up in the packet scheduler layer.  Whereas the existing BQL (Byte
    Queue Limits) limits the pkt_sched --> netdevice queuing levels,
    this controls the TCP --> pkt_sched queueing levels.

    From Eric Dumazet.

11) Reduce the number of get_page/put_page ops done on SKB fragments,
    from Alexander Duyck.

12) Implement protection against blind resets in TCP (RFC 5961), from
    Eric Dumazet.

13) Support the client side of TCP Fast Open, basically the ability to
    send data in the SYN exchange, from Yuchung Cheng.

    Basically, the sender queues up data with a sendmsg() call using
    MSG_FASTOPEN, then they do the connect() which emits the queued up
    fastopen data.

14) Avoid all the problems we get into in TCP when timers or PMTU events
    hit a locked socket.  The TCP Small Queues changes added a
    tcp_release_cb() that allows us to queue work up to the
    release_sock() caller, and that's what we use here too.  From Eric
    Dumazet.

15) Zero copy on TX support for TUN driver, from Michael S. Tsirkin.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1870 commits)
  genetlink: define lockdep_genl_is_held() when CONFIG_LOCKDEP
  r8169: revert "add byte queue limit support".
  ipv4: Change rt->rt_iif encoding.
  net: Make skb->skb_iif always track skb->dev
  ipv4: Prepare for change of rt->rt_iif encoding.
  ipv4: Remove all RTCF_DIRECTSRC handliing.
  ipv4: Really ignore ICMP address requests/replies.
  decnet: Don't set RTCF_DIRECTSRC.
  net/ipv4/ip_vti.c: Fix __rcu warnings detected by sparse.
  ipv4: Remove redundant assignment
  rds: set correct msg_namelen
  openvswitch: potential NULL deref in sample()
  tcp: dont drop MTU reduction indications
  bnx2x: Add new 57840 device IDs
  tcp: avoid oops in tcp_metrics and reset tcpm_stamp
  niu: Change niu_rbr_fill() to use unlikely() to check niu_rbr_add_page() return value
  niu: Fix to check for dma mapping errors.
  net: Fix references to out-of-scope variables in put_cmsg_compat()
  net: ethernet: davinci_emac: add pm_runtime support
  net: ethernet: davinci_emac: Remove unnecessary #include
  ...

1 files changed, 45 insertions, 82 deletions

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 33d9d0c3e3d0..5746d62faba1 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -82,8 +82,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
 	local->oper_channel = chan;
 	channel_type = ifibss->channel_type;
-	if (channel_type > NL80211_CHAN_HT20 &&
-	    !cfg80211_can_beacon_sec_chan(local->hw.wiphy, chan, channel_type))
+	if (!cfg80211_can_beacon_sec_chan(local->hw.wiphy, chan, channel_type))
 		channel_type = NL80211_CHAN_HT20;
 	if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
 		/* can only fail due to HT40+/- mismatch */
@@ -262,11 +261,7 @@ static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta,
 
 	memcpy(addr, sta->sta.addr, ETH_ALEN);
 
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
-	wiphy_debug(sdata->local->hw.wiphy,
-		    "Adding new IBSS station %pM (dev=%s)\n",
-		    addr, sdata->name);
-#endif
+	ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr);
 
 	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
 	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
@@ -280,12 +275,10 @@ static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta,
 	/* If it fails, maybe we raced another insertion? */
 	if (sta_info_insert_rcu(sta))
 		return sta_info_get(sdata, addr);
-	if (auth) {
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-		printk(KERN_DEBUG "TX Auth SA=%pM DA=%pM BSSID=%pM"
-		       "(auth_transaction=1)\n", sdata->vif.addr,
-		       sdata->u.ibss.bssid, addr);
-#endif
+	if (auth && !sdata->u.ibss.auth_frame_registrations) {
+		ibss_dbg(sdata,
+			 "TX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=1)\n",
+			 sdata->vif.addr, sdata->u.ibss.bssid, addr);
 		ieee80211_send_auth(sdata, 1, WLAN_AUTH_OPEN, NULL, 0,
 				    addr, sdata->u.ibss.bssid, NULL, 0, 0);
 	}
@@ -308,7 +301,7 @@ ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 	 * 	allow new one to be added.
 	 */
 	if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
-		net_dbg_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
+		net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
 				    sdata->name, addr);
 		rcu_read_lock();
 		return NULL;
@@ -355,11 +348,9 @@ static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
 
 	if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
 		return;
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-	printk(KERN_DEBUG "%s: RX Auth SA=%pM DA=%pM BSSID=%pM."
-	       "(auth_transaction=%d)\n",
-	       sdata->name, mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction);
-#endif
+	ibss_dbg(sdata,
+		 "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n",
+		 mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction);
 	sta_info_destroy_addr(sdata, mgmt->sa);
 	ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 0, false);
 	rcu_read_unlock();
@@ -422,15 +413,10 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 					ieee80211_mandatory_rates(local, band);
 
 				if (sta->sta.supp_rates[band] != prev_rates) {
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-					printk(KERN_DEBUG
-						"%s: updated supp_rates set "
-						"for %pM based on beacon"
-						"/probe_resp (0x%x -> 0x%x)\n",
-						sdata->name, sta->sta.addr,
-						prev_rates,
-						sta->sta.supp_rates[band]);
-#endif
+					ibss_dbg(sdata,
+						 "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n",
+						 sta->sta.addr, prev_rates,
+						 sta->sta.supp_rates[band]);
 					rates_updated = true;
 				}
 			} else {
@@ -545,22 +531,18 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 		rx_timestamp = drv_get_tsf(local, sdata);
 	}
 
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-	printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
-	       "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
-	       mgmt->sa, mgmt->bssid,
-	       (unsigned long long)rx_timestamp,
-	       (unsigned long long)beacon_timestamp,
-	       (unsigned long long)(rx_timestamp - beacon_timestamp),
-	       jiffies);
-#endif
+	ibss_dbg(sdata,
+		 "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
+		 mgmt->sa, mgmt->bssid,
+		 (unsigned long long)rx_timestamp,
+		 (unsigned long long)beacon_timestamp,
+		 (unsigned long long)(rx_timestamp - beacon_timestamp),
+		 jiffies);
 
 	if (beacon_timestamp > rx_timestamp) {
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-		printk(KERN_DEBUG "%s: beacon TSF higher than "
-		       "local TSF - IBSS merge with BSSID %pM\n",
-		       sdata->name, mgmt->bssid);
-#endif
+		ibss_dbg(sdata,
+			 "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n",
+			 mgmt->bssid);
 		ieee80211_sta_join_ibss(sdata, bss);
 		supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL);
 		ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
@@ -586,7 +568,7 @@ void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
 	 * 	allow new one to be added.
 	 */
 	if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
-		net_dbg_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
+		net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
 				    sdata->name, addr);
 		return;
 	}
@@ -662,8 +644,8 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
 	if (ifibss->fixed_channel)
 		return;
 
-	printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
-	       "IBSS networks with same SSID (merge)\n", sdata->name);
+	sdata_info(sdata,
+		   "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n");
 
 	ieee80211_request_internal_scan(sdata,
 			ifibss->ssid, ifibss->ssid_len, NULL);
@@ -691,8 +673,7 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
 		bssid[0] |= 0x02;
 	}
 
-	printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
-	       sdata->name, bssid);
+	sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid);
 
 	capability = WLAN_CAPABILITY_IBSS;
 
@@ -723,10 +704,7 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
 	lockdep_assert_held(&ifibss->mtx);
 
 	active_ibss = ieee80211_sta_active_ibss(sdata);
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-	printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
-	       sdata->name, active_ibss);
-#endif /* CONFIG_MAC80211_IBSS_DEBUG */
+	ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss);
 
 	if (active_ibss)
 		return;
@@ -749,29 +727,24 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
 		struct ieee80211_bss *bss;
 
 		bss = (void *)cbss->priv;
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-		printk(KERN_DEBUG "   sta_find_ibss: selected %pM current "
-		       "%pM\n", cbss->bssid, ifibss->bssid);
-#endif /* CONFIG_MAC80211_IBSS_DEBUG */
-
-		printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
-		       " based on configured SSID\n",
-		       sdata->name, cbss->bssid);
+		ibss_dbg(sdata,
+			 "sta_find_ibss: selected %pM current %pM\n",
+			 cbss->bssid, ifibss->bssid);
+		sdata_info(sdata,
+			   "Selected IBSS BSSID %pM based on configured SSID\n",
+			   cbss->bssid);
 
 		ieee80211_sta_join_ibss(sdata, bss);
 		ieee80211_rx_bss_put(local, bss);
 		return;
 	}
 
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-	printk(KERN_DEBUG "   did not try to join ibss\n");
-#endif /* CONFIG_MAC80211_IBSS_DEBUG */
+	ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n");
 
 	/* Selected IBSS not found in current scan results - try to scan */
 	if (time_after(jiffies, ifibss->last_scan_completed +
 					IEEE80211_SCAN_INTERVAL)) {
-		printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
-		       "join\n", sdata->name);
+		sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
 
 		ieee80211_request_internal_scan(sdata,
 				ifibss->ssid, ifibss->ssid_len,
@@ -785,9 +758,8 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
 				ieee80211_sta_create_ibss(sdata);
 				return;
 			}
-			printk(KERN_DEBUG "%s: IBSS not allowed on"
-			       " %d MHz\n", sdata->name,
-			       local->hw.conf.channel->center_freq);
+			sdata_info(sdata, "IBSS not allowed on %d MHz\n",
+				   local->hw.conf.channel->center_freq);
 
 			/* No IBSS found - decrease scan interval and continue
 			 * scanning. */
@@ -822,12 +794,9 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
 
 	tx_last_beacon = drv_tx_last_beacon(local);
 
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-	printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
-	       " (tx_last_beacon=%d)\n",
-	       sdata->name, mgmt->sa, mgmt->da,
-	       mgmt->bssid, tx_last_beacon);
-#endif /* CONFIG_MAC80211_IBSS_DEBUG */
+	ibss_dbg(sdata,
+		 "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n",
+		 mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon);
 
 	if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da))
 		return;
@@ -840,11 +809,8 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
 	pos = mgmt->u.probe_req.variable;
 	if (pos[0] != WLAN_EID_SSID ||
 	    pos + 2 + pos[1] > end) {
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-		printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
-		       "from %pM\n",
-		       sdata->name, mgmt->sa);
-#endif
+		ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n",
+			 mgmt->sa);
 		return;
 	}
 	if (pos[1] != 0 &&
@@ -861,10 +827,7 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
 
 	resp = (struct ieee80211_mgmt *) skb->data;
 	memcpy(resp->da, mgmt->sa, ETH_ALEN);
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-	printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
-	       sdata->name, resp->da);
-#endif /* CONFIG_MAC80211_IBSS_DEBUG */
+	ibss_dbg(sdata, "Sending ProbeResp to %pM\n", resp->da);
 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 	ieee80211_tx_skb(sdata, skb);
 }