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

include/net/ax25.h

@@ -139,11 +139,25 @@ enum {
 #define AX25_DEF_DS_TIMEOUT	(3 * 60 * HZ)		/* DAMA timeout 3 minutes */
 
 typedef struct ax25_uid_assoc {
-	struct ax25_uid_assoc	*next;
+	struct hlist_node	uid_node;
+	atomic_t		refcount;
 	uid_t			uid;
 	ax25_address		call;
 } ax25_uid_assoc;
 
+#define ax25_uid_for_each(__ax25, node, list) \
+	hlist_for_each_entry(__ax25, node, list, uid_node)
+
+#define ax25_uid_hold(ax25) \
+	atomic_inc(&((ax25)->refcount))
+
+static inline void ax25_uid_put(ax25_uid_assoc *assoc)
+{
+	if (atomic_dec_and_test(&assoc->refcount)) {
+		kfree(assoc);
+	}
+}
+
 typedef struct {
 	ax25_address		calls[AX25_MAX_DIGIS];
 	unsigned char		repeated[AX25_MAX_DIGIS];
@@ -376,7 +390,7 @@ extern unsigned long ax25_display_timer(struct timer_list *);
 
 /* ax25_uid.c */
 extern int  ax25_uid_policy;
-extern ax25_address *ax25_findbyuid(uid_t);
+extern ax25_uid_assoc *ax25_findbyuid(uid_t);
 extern int  ax25_uid_ioctl(int, struct sockaddr_ax25 *);
 extern struct file_operations ax25_uid_fops;
 extern void ax25_uid_free(void);

include/net/sock.h

@@ -384,6 +384,11 @@ enum sock_flags {
 	SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
 };
 
+static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
+{
+	nsk->sk_flags = osk->sk_flags;
+}
+
 static inline void sock_set_flag(struct sock *sk, enum sock_flags flag)
 {
 	__set_bit(flag, &sk->sk_flags);

net/ax25/af_ax25.c

@@ -875,12 +875,7 @@ struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
 	sk->sk_sndbuf   = osk->sk_sndbuf;
 	sk->sk_state    = TCP_ESTABLISHED;
 	sk->sk_sleep    = osk->sk_sleep;
-
-	if (sock_flag(osk, SOCK_DBG))
-		sock_set_flag(sk, SOCK_DBG);
-
-	if (sock_flag(osk, SOCK_ZAPPED))
-		sock_set_flag(sk, SOCK_ZAPPED);
+	sock_copy_flags(sk, osk);
 
 	oax25 = ax25_sk(osk);
 
@@ -1007,7 +1002,8 @@ static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 	struct sock *sk = sock->sk;
 	struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
 	ax25_dev *ax25_dev = NULL;
-	ax25_address *call;
+	ax25_uid_assoc *user;
+	ax25_address call;
 	ax25_cb *ax25;
 	int err = 0;
 
@@ -1026,9 +1022,15 @@ static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 	if (addr->fsa_ax25.sax25_family != AF_AX25)
 		return -EINVAL;
 
-	call = ax25_findbyuid(current->euid);
-	if (call == NULL && ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
-		return -EACCES;
+	user = ax25_findbyuid(current->euid);
+	if (user) {
+		call = user->call;
+		ax25_uid_put(user);
+	} else {
+		if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
+			return -EACCES;
+
+		call = addr->fsa_ax25.sax25_call;
 	}
 
 	lock_sock(sk);
@@ -1039,10 +1041,7 @@ static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 		goto out;
 	}
 
-	if (call == NULL)
-		ax25->source_addr = addr->fsa_ax25.sax25_call;
-	else
-		ax25->source_addr = *call;
+	ax25->source_addr = call;
 
 	/*
 	 * User already set interface with SO_BINDTODEVICE

net/ax25/ax25_route.c

@@ -422,8 +422,8 @@ static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat)
  */
 int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
 {
+	ax25_uid_assoc *user;
 	ax25_route *ax25_rt;
-	ax25_address *call;
 	int err;
 
 	if ((ax25_rt = ax25_get_route(addr, NULL)) == NULL)
@@ -434,16 +434,18 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
 		goto put;
 	}
 
-	if ((call = ax25_findbyuid(current->euid)) == NULL) {
+	user = ax25_findbyuid(current->euid);
+	if (user) {
+		ax25->source_addr = user->call;
+		ax25_uid_put(user);
+	} else {
 		if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
 			err = -EPERM;
 			goto put;
 		}
-		call = (ax25_address *)ax25->ax25_dev->dev->dev_addr;
+		ax25->source_addr = *(ax25_address *)ax25->ax25_dev->dev->dev_addr;
 	}
 
-	ax25->source_addr = *call;
-
 	if (ax25_rt->digipeat != NULL) {
 		if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
 			err = -ENOMEM;

net/ax25/ax25_uid.c

@@ -28,6 +28,7 @@
 #include <linux/fcntl.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
+#include <linux/list.h>
 #include <linux/notifier.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
@@ -41,38 +42,41 @@
  *	Callsign/UID mapper. This is in kernel space for security on multi-amateur machines.
  */
 
-static ax25_uid_assoc *ax25_uid_list;
+HLIST_HEAD(ax25_uid_list);
 static DEFINE_RWLOCK(ax25_uid_lock);
 
 int ax25_uid_policy = 0;
 
-ax25_address *ax25_findbyuid(uid_t uid)
+ax25_uid_assoc *ax25_findbyuid(uid_t uid)
 {
-	ax25_uid_assoc *ax25_uid;
-	ax25_address *res = NULL;
+	ax25_uid_assoc *ax25_uid, *res = NULL;
+	struct hlist_node *node;
 
 	read_lock(&ax25_uid_lock);
-	for (ax25_uid = ax25_uid_list; ax25_uid != NULL; ax25_uid = ax25_uid->next) {
+	ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) {
 		if (ax25_uid->uid == uid) {
-			res = &ax25_uid->call;
+			ax25_uid_hold(ax25_uid);
+			res = ax25_uid;
 			break;
 		}
 	}
 	read_unlock(&ax25_uid_lock);
 
-	return NULL;
+	return res;
 }
 
 int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 {
-	ax25_uid_assoc *s, *ax25_uid;
+	ax25_uid_assoc *ax25_uid;
+	struct hlist_node *node;
+	ax25_uid_assoc *user;
 	unsigned long res;
 
 	switch (cmd) {
 	case SIOCAX25GETUID:
 		res = -ENOENT;
 		read_lock(&ax25_uid_lock);
-		for (ax25_uid = ax25_uid_list; ax25_uid != NULL; ax25_uid = ax25_uid->next) {
+		ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) {
 			if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) {
 				res = ax25_uid->uid;
 				break;
@@ -85,19 +89,22 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 	case SIOCAX25ADDUID:
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
-		if (ax25_findbyuid(sax->sax25_uid))
+		user = ax25_findbyuid(sax->sax25_uid);
+		if (user) {
+			ax25_uid_put(user);
 			return -EEXIST;
+		}
 		if (sax->sax25_uid == 0)
 			return -EINVAL;
 		if ((ax25_uid = kmalloc(sizeof(*ax25_uid), GFP_KERNEL)) == NULL)
 			return -ENOMEM;
 
+		atomic_set(&ax25_uid->refcount, 1);
 		ax25_uid->uid  = sax->sax25_uid;
 		ax25_uid->call = sax->sax25_call;
 
 		write_lock(&ax25_uid_lock);
-		ax25_uid->next = ax25_uid_list;
-		ax25_uid_list  = ax25_uid;
+		hlist_add_head(&ax25_uid->uid_node, &ax25_uid_list);
 		write_unlock(&ax25_uid_lock);
 
 		return 0;
@@ -106,34 +113,21 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
 
+		ax25_uid = NULL;
 		write_lock(&ax25_uid_lock);
-		for (ax25_uid = ax25_uid_list; ax25_uid != NULL; ax25_uid = ax25_uid->next) {
-			if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) {
+		ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) {
+			if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0)
 				break;
-			}
 		}
 		if (ax25_uid == NULL) {
 			write_unlock(&ax25_uid_lock);
 			return -ENOENT;
 		}
-		if ((s = ax25_uid_list) == ax25_uid) {
-			ax25_uid_list = s->next;
-			write_unlock(&ax25_uid_lock);
-			kfree(ax25_uid);
-			return 0;
-		}
-		while (s != NULL && s->next != NULL) {
-			if (s->next == ax25_uid) {
-				s->next = ax25_uid->next;
-				write_unlock(&ax25_uid_lock);
-				kfree(ax25_uid);
-				return 0;
-			}
-			s = s->next;
-		}
+		hlist_del_init(&ax25_uid->uid_node);
+		ax25_uid_put(ax25_uid);
 		write_unlock(&ax25_uid_lock);
 
-		return -ENOENT;
+		return 0;
 
 	default:
 		return -EINVAL;
@@ -147,13 +141,11 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 static void *ax25_uid_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	struct ax25_uid_assoc *pt;
-	int i = 1;
+	struct hlist_node *node;
+	int i = 0;
 
 	read_lock(&ax25_uid_lock);
-	if (*pos == 0)
-		return SEQ_START_TOKEN;
-
-	for (pt = ax25_uid_list; pt != NULL; pt = pt->next) {
+	ax25_uid_for_each(pt, node, &ax25_uid_list) {
 		if (i == *pos)
 			return pt;
 		++i;
@@ -164,8 +156,9 @@ static void *ax25_uid_seq_start(struct seq_file *seq, loff_t *pos)
 static void *ax25_uid_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	++*pos;
-	return (v == SEQ_START_TOKEN) ? ax25_uid_list : 
-		((struct ax25_uid_assoc *) v)->next;
+
+	return hlist_entry(((ax25_uid_assoc *)v)->uid_node.next,
+	                   ax25_uid_assoc, uid_node);
 }
 
 static void ax25_uid_seq_stop(struct seq_file *seq, void *v)
@@ -179,7 +172,6 @@ static int ax25_uid_seq_show(struct seq_file *seq, void *v)
 		seq_printf(seq, "Policy: %d\n", ax25_uid_policy);
 	else {
 		struct ax25_uid_assoc *pt = v;
-
 
 		seq_printf(seq, "%6d %s\n", pt->uid, ax2asc(&pt->call));
 	}
@@ -213,16 +205,13 @@ struct file_operations ax25_uid_fops = {
  */
 void __exit ax25_uid_free(void)
 {
-	ax25_uid_assoc *s, *ax25_uid;
+	ax25_uid_assoc *ax25_uid;
+	struct hlist_node *node;
 
 	write_lock(&ax25_uid_lock);
-	ax25_uid = ax25_uid_list;
-	while (ax25_uid != NULL) {
-		s        = ax25_uid;
-		ax25_uid = ax25_uid->next;
-
-		kfree(s);
+	ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) {
+		hlist_del_init(&ax25_uid->uid_node);
+		ax25_uid_put(ax25_uid);
 	}
-	ax25_uid_list = NULL;
 	write_unlock(&ax25_uid_lock);
 }

net/ipv4/inetpeer.c

@@ -450,10 +450,13 @@ static void peer_check_expire(unsigned long dummy)
 	/* Trigger the timer after inet_peer_gc_mintime .. inet_peer_gc_maxtime
 	 * interval depending on the total number of entries (more entries,
 	 * less interval). */
-	peer_periodic_timer.expires = jiffies
-		+ inet_peer_gc_maxtime
-		- (inet_peer_gc_maxtime - inet_peer_gc_mintime) / HZ *
-			peer_total / inet_peer_threshold * HZ;
+	if (peer_total >= inet_peer_threshold)
+		peer_periodic_timer.expires = jiffies + inet_peer_gc_mintime;
+	else
+		peer_periodic_timer.expires = jiffies
+			+ inet_peer_gc_maxtime
+			- (inet_peer_gc_maxtime - inet_peer_gc_mintime) / HZ *
+				peer_total / inet_peer_threshold * HZ;
 	add_timer(&peer_periodic_timer);
 }
 

net/ipv4/netfilter/ip_queue.c

@@ -214,6 +214,12 @@ ipq_build_packet_message(struct ipq_queue_entry *entry, int *errp)
 		break;
 
 	case IPQ_COPY_PACKET:
+		if (entry->skb->ip_summed == CHECKSUM_HW &&
+		    (*errp = skb_checksum_help(entry->skb,
+		                               entry->info->outdev == NULL))) {
+			read_unlock_bh(&queue_lock);
+			return NULL;
+		}
 		if (copy_range == 0 || copy_range > entry->skb->len)
 			data_len = entry->skb->len;
 		else
@@ -385,6 +391,7 @@ ipq_mangle_ipv4(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
 	if (!skb_ip_make_writable(&e->skb, v->data_len))
 		return -ENOMEM;
 	memcpy(e->skb->data, v->payload, v->data_len);
+	e->skb->ip_summed = CHECKSUM_NONE;
 	e->skb->nfcache |= NFC_ALTERED;
 
 	/*

net/ipv4/tcp.c

@@ -584,7 +584,7 @@ static inline void skb_entail(struct sock *sk, struct tcp_sock *tp,
 	sk_charge_skb(sk, skb);
 	if (!sk->sk_send_head)
 		sk->sk_send_head = skb;
-	else if (tp->nonagle&TCP_NAGLE_PUSH)
+	if (tp->nonagle & TCP_NAGLE_PUSH)
 		tp->nonagle &= ~TCP_NAGLE_PUSH; 
 }
 

net/ipv4/tcp_ipv4.c

@@ -242,9 +242,14 @@ static int tcp_v4_get_port(struct sock *sk, unsigned short snum)
 		tcp_port_rover = rover;
 		spin_unlock(&tcp_portalloc_lock);
 
-		/* Exhausted local port range during search? */
+		/* Exhausted local port range during search?  It is not
+		 * possible for us to be holding one of the bind hash
+		 * locks if this test triggers, because if 'remaining'
+		 * drops to zero, we broke out of the do/while loop at
+		 * the top level, not from the 'break;' statement.
+		 */
 		ret = 1;
-		if (remaining <= 0)
+		if (unlikely(remaining <= 0))
 			goto fail;
 
 		/* OK, here is the one we will use.  HEAD is

net/ipv4/tcp_output.c

@@ -925,10 +925,6 @@ static int tcp_tso_should_defer(struct sock *sk, struct tcp_sock *tp, struct sk_
 
 	limit = min(send_win, cong_win);
 
-	/* If sk_send_head can be sent fully now, just do it.  */
-	if (skb->len <= limit)
-		return 0;
-
 	if (sysctl_tcp_tso_win_divisor) {
 		u32 chunk = min(tp->snd_wnd, tp->snd_cwnd * tp->mss_cache);