Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [IPV4]: Remove IPVS icmp hack from route.c for now.
  [IPV4]: Correct rp_filter help text.
  [TCP]: TCP_CONG_YEAH requires TCP_CONG_VEGAS
  [TCP] slow start: Make comments and code logic clearer.
  [BLUETOOTH]: Fix locking in hci_sock_dev_event().
  [NET]: Fix BMSR_100{HALF,FULL}2 defines in linux/mii.h
  [NET]: lockdep classes in register_netdevice

include/linux/mii.h

@@ -56,8 +56,8 @@
 #define BMSR_ANEGCOMPLETE       0x0020  /* Auto-negotiation complete   */
 #define BMSR_RESV               0x00c0  /* Unused...                   */
 #define BMSR_ESTATEN		0x0100	/* Extended Status in R15 */
-#define BMSR_100FULL2		0x0200	/* Can do 100BASE-T2 HDX */
-#define BMSR_100HALF2		0x0400	/* Can do 100BASE-T2 FDX */
+#define BMSR_100HALF2           0x0200  /* Can do 100BASE-T2 HDX */
+#define BMSR_100FULL2           0x0400  /* Can do 100BASE-T2 FDX */
 #define BMSR_10HALF             0x0800  /* Can do 10mbps, half-duplex  */
 #define BMSR_10FULL             0x1000  /* Can do 10mbps, full-duplex  */
 #define BMSR_100HALF            0x2000  /* Can do 100mbps, half-duplex */

net/bluetooth/hci_sock.c

@@ -665,7 +665,8 @@ static int hci_sock_dev_event(struct notifier_block *this, unsigned long event,
 		/* Detach sockets from device */
 		read_lock(&hci_sk_list.lock);
 		sk_for_each(sk, node, &hci_sk_list.head) {
-			lock_sock(sk);
+			local_bh_disable();
+			bh_lock_sock_nested(sk);
 			if (hci_pi(sk)->hdev == hdev) {
 				hci_pi(sk)->hdev = NULL;
 				sk->sk_err = EPIPE;
@@ -674,7 +675,8 @@ static int hci_sock_dev_event(struct notifier_block *this, unsigned long event,
 
 				hci_dev_put(hdev);
 			}
-			release_sock(sk);
+			bh_unlock_sock(sk);
+			local_bh_enable();
 		}
 		read_unlock(&hci_sk_list.lock);
 	}

net/core/dev.c

@@ -116,6 +116,7 @@
 #include <linux/dmaengine.h>
 #include <linux/err.h>
 #include <linux/ctype.h>
+#include <linux/if_arp.h>
 
 /*
  *	The list of packet types we will receive (as opposed to discard)
@@ -217,6 +218,73 @@ extern void netdev_unregister_sysfs(struct net_device *);
 #define	netdev_unregister_sysfs(dev)	do { } while(0)
 #endif
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+/*
+ * register_netdevice() inits dev->_xmit_lock and sets lockdep class
+ * according to dev->type
+ */
+static const unsigned short netdev_lock_type[] =
+	{ARPHRD_NETROM, ARPHRD_ETHER, ARPHRD_EETHER, ARPHRD_AX25,
+	 ARPHRD_PRONET, ARPHRD_CHAOS, ARPHRD_IEEE802, ARPHRD_ARCNET,
+	 ARPHRD_APPLETLK, ARPHRD_DLCI, ARPHRD_ATM, ARPHRD_METRICOM,
+	 ARPHRD_IEEE1394, ARPHRD_EUI64, ARPHRD_INFINIBAND, ARPHRD_SLIP,
+	 ARPHRD_CSLIP, ARPHRD_SLIP6, ARPHRD_CSLIP6, ARPHRD_RSRVD,
+	 ARPHRD_ADAPT, ARPHRD_ROSE, ARPHRD_X25, ARPHRD_HWX25,
+	 ARPHRD_PPP, ARPHRD_CISCO, ARPHRD_LAPB, ARPHRD_DDCMP,
+	 ARPHRD_RAWHDLC, ARPHRD_TUNNEL, ARPHRD_TUNNEL6, ARPHRD_FRAD,
+	 ARPHRD_SKIP, ARPHRD_LOOPBACK, ARPHRD_LOCALTLK, ARPHRD_FDDI,
+	 ARPHRD_BIF, ARPHRD_SIT, ARPHRD_IPDDP, ARPHRD_IPGRE,
+	 ARPHRD_PIMREG, ARPHRD_HIPPI, ARPHRD_ASH, ARPHRD_ECONET,
+	 ARPHRD_IRDA, ARPHRD_FCPP, ARPHRD_FCAL, ARPHRD_FCPL,
+	 ARPHRD_FCFABRIC, ARPHRD_IEEE802_TR, ARPHRD_IEEE80211,
+	 ARPHRD_IEEE80211_PRISM, ARPHRD_IEEE80211_RADIOTAP, ARPHRD_VOID,
+	 ARPHRD_NONE};
+
+static const char *netdev_lock_name[] =
+	{"_xmit_NETROM", "_xmit_ETHER", "_xmit_EETHER", "_xmit_AX25",
+	 "_xmit_PRONET", "_xmit_CHAOS", "_xmit_IEEE802", "_xmit_ARCNET",
+	 "_xmit_APPLETLK", "_xmit_DLCI", "_xmit_ATM", "_xmit_METRICOM",
+	 "_xmit_IEEE1394", "_xmit_EUI64", "_xmit_INFINIBAND", "_xmit_SLIP",
+	 "_xmit_CSLIP", "_xmit_SLIP6", "_xmit_CSLIP6", "_xmit_RSRVD",
+	 "_xmit_ADAPT", "_xmit_ROSE", "_xmit_X25", "_xmit_HWX25",
+	 "_xmit_PPP", "_xmit_CISCO", "_xmit_LAPB", "_xmit_DDCMP",
+	 "_xmit_RAWHDLC", "_xmit_TUNNEL", "_xmit_TUNNEL6", "_xmit_FRAD",
+	 "_xmit_SKIP", "_xmit_LOOPBACK", "_xmit_LOCALTLK", "_xmit_FDDI",
+	 "_xmit_BIF", "_xmit_SIT", "_xmit_IPDDP", "_xmit_IPGRE",
+	 "_xmit_PIMREG", "_xmit_HIPPI", "_xmit_ASH", "_xmit_ECONET",
+	 "_xmit_IRDA", "_xmit_FCPP", "_xmit_FCAL", "_xmit_FCPL",
+	 "_xmit_FCFABRIC", "_xmit_IEEE802_TR", "_xmit_IEEE80211",
+	 "_xmit_IEEE80211_PRISM", "_xmit_IEEE80211_RADIOTAP", "_xmit_VOID",
+	 "_xmit_NONE"};
+
+static struct lock_class_key netdev_xmit_lock_key[ARRAY_SIZE(netdev_lock_type)];
+
+static inline unsigned short netdev_lock_pos(unsigned short dev_type)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(netdev_lock_type); i++)
+		if (netdev_lock_type[i] == dev_type)
+			return i;
+	/* the last key is used by default */
+	return ARRAY_SIZE(netdev_lock_type) - 1;
+}
+
+static inline void netdev_set_lockdep_class(spinlock_t *lock,
+					    unsigned short dev_type)
+{
+	int i;
+
+	i = netdev_lock_pos(dev_type);
+	lockdep_set_class_and_name(lock, &netdev_xmit_lock_key[i],
+				   netdev_lock_name[i]);
+}
+#else
+static inline void netdev_set_lockdep_class(spinlock_t *lock,
+					    unsigned short dev_type)
+{
+}
+#endif
 
 /*******************************************************************************
 
@@ -3001,6 +3069,7 @@ int register_netdevice(struct net_device *dev)
 
 	spin_lock_init(&dev->queue_lock);
 	spin_lock_init(&dev->_xmit_lock);
+	netdev_set_lockdep_class(&dev->_xmit_lock, dev->type);
 	dev->xmit_lock_owner = -1;
 	spin_lock_init(&dev->ingress_lock);
 

net/ipv4/Kconfig

@@ -43,11 +43,11 @@ config IP_ADVANCED_ROUTER
 	  asymmetric routing (packets from you to a host take a different path
 	  than packets from that host to you) or if you operate a non-routing
 	  host which has several IP addresses on different interfaces. To turn
-	  rp_filter off use:
+	  rp_filter on use:
 
-	  echo 0 > /proc/sys/net/ipv4/conf/<device>/rp_filter
+	  echo 1 > /proc/sys/net/ipv4/conf/<device>/rp_filter
 	  or
-	  echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter
+	  echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter
 
 	  If unsure, say N here.
 
@@ -577,6 +577,7 @@ config TCP_CONG_VENO
 config TCP_CONG_YEAH
 	tristate "YeAH TCP"
 	depends on EXPERIMENTAL
+	select TCP_CONG_VEGAS
 	default n
 	---help---
 	YeAH-TCP is a sender-side high-speed enabled TCP congestion control

net/ipv4/route.c

@@ -2396,7 +2396,7 @@ static int ip_route_output_slow(struct rtable **rp, const struct flowi *oldflp)
 
 		/* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
 		dev_out = ip_dev_find(oldflp->fl4_src);
-		if ((dev_out == NULL) && !(sysctl_ip_nonlocal_bind))
+		if (dev_out == NULL)
 			goto out;
 
 		/* I removed check for oif == dev_out->oif here.
@@ -2407,7 +2407,7 @@ static int ip_route_output_slow(struct rtable **rp, const struct flowi *oldflp)
 		      of another iface. --ANK
 		 */
 
-		if (dev_out && oldflp->oif == 0
+		if (oldflp->oif == 0
 		    && (MULTICAST(oldflp->fl4_dst) || oldflp->fl4_dst == htonl(0xFFFFFFFF))) {
 			/* Special hack: user can direct multicasts
 			   and limited broadcast via necessary interface

net/ipv4/tcp_cong.c

@@ -276,30 +276,34 @@ int tcp_set_congestion_control(struct sock *sk, const char *name)
 
 
 /*
- * Slow start (exponential increase) with
- * RFC3742 Limited Slow Start (fast linear increase) support.
+ * Slow start is used when congestion window is less than slow start
+ * threshold. This version implements the basic RFC2581 version
+ * and optionally supports:
+ * 	RFC3742 Limited Slow Start  	  - growth limited to max_ssthresh
+ *	RFC3465 Appropriate Byte Counting - growth limited by bytes acknowledged
  */
 void tcp_slow_start(struct tcp_sock *tp)
 {
-	int cnt = 0;
-
-	if (sysctl_tcp_abc) {
-		/* RFC3465: Slow Start
-		 * TCP sender SHOULD increase cwnd by the number of
-		 * previously unacknowledged bytes ACKed by each incoming
-		 * acknowledgment, provided the increase is not more than L
-		 */
-		if (tp->bytes_acked < tp->mss_cache)
-			return;
-	}
+	int cnt; /* increase in packets */
+
+	/* RFC3465: ABC Slow start
+	 * Increase only after a full MSS of bytes is acked
+	 *
+	 * TCP sender SHOULD increase cwnd by the number of
+	 * previously unacknowledged bytes ACKed by each incoming
+	 * acknowledgment, provided the increase is not more than L
+	 */
+	if (sysctl_tcp_abc && tp->bytes_acked < tp->mss_cache)
+		return;
 
-	if (sysctl_tcp_max_ssthresh > 0 &&
-	    tp->snd_cwnd > sysctl_tcp_max_ssthresh)
-		cnt += sysctl_tcp_max_ssthresh>>1;
+	if (sysctl_tcp_max_ssthresh > 0 && tp->snd_cwnd > sysctl_tcp_max_ssthresh)
+		cnt = sysctl_tcp_max_ssthresh >> 1;	/* limited slow start */
 	else
-		cnt += tp->snd_cwnd;
+		cnt = tp->snd_cwnd;			/* exponential increase */
 
-	/* RFC3465: We MAY increase by 2 if discovered delayed ack */
+	/* RFC3465: ABC
+	 * We MAY increase by 2 if discovered delayed ack
+	 */
 	if (sysctl_tcp_abc > 1 && tp->bytes_acked >= 2*tp->mss_cache)
 		cnt <<= 1;
 	tp->bytes_acked = 0;