6 files changed, 166 insertions, 82 deletions

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 5c9c657..750effe 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1036,7 +1036,12 @@ int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)
 /* This actually signals the guest, using eventfd. */
 void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
 {
-	__u16 flags = 0;
+	__u16 flags;
+	/* Flush out used index updates. This is paired
+	 * with the barrier that the Guest executes when enabling
+	 * interrupts. */
+	smp_mb();
+
 	if (get_user(flags, &vq->avail->flags)) {
 		vq_err(vq, "Failed to get flags");
 		return;
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index cfd420ba..c3af67f 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -111,10 +111,7 @@ enum {
 	IFLA_NET_NS_PID,
 	IFLA_IFALIAS,
 	IFLA_NUM_VF,		/* Number of VFs if device is SR-IOV PF */
-	IFLA_VF_MAC,		/* Hardware queue specific attributes */
-	IFLA_VF_VLAN,
-	IFLA_VF_TX_RATE,	/* TX Bandwidth Allocation */
-	IFLA_VFINFO,
+	IFLA_VFINFO_LIST,
 	IFLA_STATS64,
 	__IFLA_MAX
 };
@@ -236,6 +233,24 @@ enum macvlan_mode {
 
 /* SR-IOV virtual function managment section */
 
+enum {
+	IFLA_VF_INFO_UNSPEC,
+	IFLA_VF_INFO,
+	__IFLA_VF_INFO_MAX,
+};
+
+#define IFLA_VF_INFO_MAX (__IFLA_VF_INFO_MAX - 1)
+
+enum {
+	IFLA_VF_UNSPEC,
+	IFLA_VF_MAC,		/* Hardware queue specific attributes */
+	IFLA_VF_VLAN,
+	IFLA_VF_TX_RATE,	/* TX Bandwidth Allocation */
+	__IFLA_VF_MAX,
+};
+
+#define IFLA_VF_MAX (__IFLA_VF_MAX - 1)
+
 struct ifla_vf_mac {
 	__u32 vf;
 	__u8 mac[32]; /* MAX_ADDR_LEN */
diff --git a/include/net/tcp.h b/include/net/tcp.h
index fb5c66b..a144914 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1206,30 +1206,15 @@ extern int			tcp_v4_md5_do_del(struct sock *sk,
 extern struct tcp_md5sig_pool * __percpu *tcp_alloc_md5sig_pool(struct sock *);
 extern void			tcp_free_md5sig_pool(void);
 
-extern struct tcp_md5sig_pool	*__tcp_get_md5sig_pool(int cpu);
-extern void			__tcp_put_md5sig_pool(void);
+extern struct tcp_md5sig_pool	*tcp_get_md5sig_pool(void);
+extern void			tcp_put_md5sig_pool(void);
+
 extern int tcp_md5_hash_header(struct tcp_md5sig_pool *, struct tcphdr *);
 extern int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *, struct sk_buff *,
 				 unsigned header_len);
 extern int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
 			    struct tcp_md5sig_key *key);
 
-static inline
-struct tcp_md5sig_pool		*tcp_get_md5sig_pool(void)
-{
-	int cpu = get_cpu();
-	struct tcp_md5sig_pool *ret = __tcp_get_md5sig_pool(cpu);
-	if (!ret)
-		put_cpu();
-	return ret;
-}
-
-static inline void		tcp_put_md5sig_pool(void)
-{
-	__tcp_put_md5sig_pool();
-	put_cpu();
-}
-
 /* write queue abstraction */
 static inline void tcp_write_queue_purge(struct sock *sk)
 {
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 23a71cb..66db120 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -644,12 +644,19 @@ static void copy_rtnl_link_stats64(void *v, const struct net_device_stats *b)
 	memcpy(v, &a, sizeof(a));
 }
 
+/* All VF info */
 static inline int rtnl_vfinfo_size(const struct net_device *dev)
 {
-	if (dev->dev.parent && dev_is_pci(dev->dev.parent))
-		return dev_num_vf(dev->dev.parent) *
-			sizeof(struct ifla_vf_info);
-	else
+	if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
+
+		int num_vfs = dev_num_vf(dev->dev.parent);
+		size_t size = nlmsg_total_size(sizeof(struct nlattr));
+		size += nlmsg_total_size(num_vfs * sizeof(struct nlattr));
+		size += num_vfs * (sizeof(struct ifla_vf_mac) +
+				  sizeof(struct ifla_vf_vlan) +
+				  sizeof(struct ifla_vf_tx_rate));
+		return size;
+	} else
 		return 0;
 }
 
@@ -672,7 +679,7 @@ static inline size_t if_nlmsg_size(const struct net_device *dev)
 	       + nla_total_size(1) /* IFLA_OPERSTATE */
 	       + nla_total_size(1) /* IFLA_LINKMODE */
 	       + nla_total_size(4) /* IFLA_NUM_VF */
-	       + nla_total_size(rtnl_vfinfo_size(dev)) /* IFLA_VFINFO */
+	       + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
 	       + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
 }
 
@@ -749,14 +756,37 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 
 	if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
 		int i;
-		struct ifla_vf_info ivi;
 
-		NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
-		for (i = 0; i < dev_num_vf(dev->dev.parent); i++) {
+		struct nlattr *vfinfo, *vf;
+		int num_vfs = dev_num_vf(dev->dev.parent);
+
+		NLA_PUT_U32(skb, IFLA_NUM_VF, num_vfs);
+		vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
+		if (!vfinfo)
+			goto nla_put_failure;
+		for (i = 0; i < num_vfs; i++) {
+			struct ifla_vf_info ivi;
+			struct ifla_vf_mac vf_mac;
+			struct ifla_vf_vlan vf_vlan;
+			struct ifla_vf_tx_rate vf_tx_rate;
 			if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
 				break;
-			NLA_PUT(skb, IFLA_VFINFO, sizeof(ivi), &ivi);
+			vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf;
+			memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
+			vf_vlan.vlan = ivi.vlan;
+			vf_vlan.qos = ivi.qos;
+			vf_tx_rate.rate = ivi.tx_rate;
+			vf = nla_nest_start(skb, IFLA_VF_INFO);
+			if (!vf) {
+				nla_nest_cancel(skb, vfinfo);
+				goto nla_put_failure;
+			}
+			NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
+			NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
+			NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate);
+			nla_nest_end(skb, vf);
 		}
+		nla_nest_end(skb, vfinfo);
 	}
 	if (dev->rtnl_link_ops) {
 		if (rtnl_link_fill(skb, dev) < 0)
@@ -818,12 +848,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
 	[IFLA_LINKINFO]		= { .type = NLA_NESTED },
 	[IFLA_NET_NS_PID]	= { .type = NLA_U32 },
 	[IFLA_IFALIAS]	        = { .type = NLA_STRING, .len = IFALIASZ-1 },
-	[IFLA_VF_MAC]		= { .type = NLA_BINARY,
-				    .len = sizeof(struct ifla_vf_mac) },
-	[IFLA_VF_VLAN]		= { .type = NLA_BINARY,
-				    .len = sizeof(struct ifla_vf_vlan) },
-	[IFLA_VF_TX_RATE]	= { .type = NLA_BINARY,
-				    .len = sizeof(struct ifla_vf_tx_rate) },
+	[IFLA_VFINFO_LIST]	= {. type = NLA_NESTED },
 };
 EXPORT_SYMBOL(ifla_policy);
 
@@ -832,6 +857,19 @@ static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
 	[IFLA_INFO_DATA]	= { .type = NLA_NESTED },
 };
 
+static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
+	[IFLA_VF_INFO]		= { .type = NLA_NESTED },
+};
+
+static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
+	[IFLA_VF_MAC]		= { .type = NLA_BINARY,
+				    .len = sizeof(struct ifla_vf_mac) },
+	[IFLA_VF_VLAN]		= { .type = NLA_BINARY,
+				    .len = sizeof(struct ifla_vf_vlan) },
+	[IFLA_VF_TX_RATE]	= { .type = NLA_BINARY,
+				    .len = sizeof(struct ifla_vf_tx_rate) },
+};
+
 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
 {
 	struct net *net;
@@ -861,6 +899,52 @@ static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
 	return 0;
 }
 
+static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
+{
+	int rem, err = -EINVAL;
+	struct nlattr *vf;
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	nla_for_each_nested(vf, attr, rem) {
+		switch (nla_type(vf)) {
+		case IFLA_VF_MAC: {
+			struct ifla_vf_mac *ivm;
+			ivm = nla_data(vf);
+			err = -EOPNOTSUPP;
+			if (ops->ndo_set_vf_mac)
+				err = ops->ndo_set_vf_mac(dev, ivm->vf,
+							  ivm->mac);
+			break;
+		}
+		case IFLA_VF_VLAN: {
+			struct ifla_vf_vlan *ivv;
+			ivv = nla_data(vf);
+			err = -EOPNOTSUPP;
+			if (ops->ndo_set_vf_vlan)
+				err = ops->ndo_set_vf_vlan(dev, ivv->vf,
+							   ivv->vlan,
+							   ivv->qos);
+			break;
+		}
+		case IFLA_VF_TX_RATE: {
+			struct ifla_vf_tx_rate *ivt;
+			ivt = nla_data(vf);
+			err = -EOPNOTSUPP;
+			if (ops->ndo_set_vf_tx_rate)
+				err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
+							      ivt->rate);
+			break;
+		}
+		default:
+			err = -EINVAL;
+			break;
+		}
+		if (err)
+			break;
+	}
+	return err;
+}
+
 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		      struct nlattr **tb, char *ifname, int modified)
 {
@@ -991,40 +1075,17 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		write_unlock_bh(&dev_base_lock);
 	}
 
-	if (tb[IFLA_VF_MAC]) {
-		struct ifla_vf_mac *ivm;
-		ivm = nla_data(tb[IFLA_VF_MAC]);
-		err = -EOPNOTSUPP;
-		if (ops->ndo_set_vf_mac)
-			err = ops->ndo_set_vf_mac(dev, ivm->vf, ivm->mac);
-		if (err < 0)
-			goto errout;
-		modified = 1;
-	}
-
-	if (tb[IFLA_VF_VLAN]) {
-		struct ifla_vf_vlan *ivv;
-		ivv = nla_data(tb[IFLA_VF_VLAN]);
-		err = -EOPNOTSUPP;
-		if (ops->ndo_set_vf_vlan)
-			err = ops->ndo_set_vf_vlan(dev, ivv->vf,
-						   ivv->vlan,
-						   ivv->qos);
-		if (err < 0)
-			goto errout;
-		modified = 1;
-	}
-	err = 0;
-
-	if (tb[IFLA_VF_TX_RATE]) {
-		struct ifla_vf_tx_rate *ivt;
-		ivt = nla_data(tb[IFLA_VF_TX_RATE]);
-		err = -EOPNOTSUPP;
-		if (ops->ndo_set_vf_tx_rate)
-			err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, ivt->rate);
-		if (err < 0)
-			goto errout;
-		modified = 1;
+	if (tb[IFLA_VFINFO_LIST]) {
+		struct nlattr *attr;
+		int rem;
+		nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
+			if (nla_type(attr) != IFLA_VF_INFO)
+				goto errout;
+			err = do_setvfinfo(dev, attr);
+			if (err < 0)
+				goto errout;
+			modified = 1;
+		}
 	}
 	err = 0;
 
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 8ce2974..3284393 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2840,7 +2840,6 @@ static void __tcp_free_md5sig_pool(struct tcp_md5sig_pool * __percpu *pool)
 			if (p->md5_desc.tfm)
 				crypto_free_hash(p->md5_desc.tfm);
 			kfree(p);
-			p = NULL;
 		}
 	}
 	free_percpu(pool);
@@ -2938,25 +2937,40 @@ retry:
 
 EXPORT_SYMBOL(tcp_alloc_md5sig_pool);
 
-struct tcp_md5sig_pool *__tcp_get_md5sig_pool(int cpu)
+
+/**
+ *	tcp_get_md5sig_pool - get md5sig_pool for this user
+ *
+ *	We use percpu structure, so if we succeed, we exit with preemption
+ *	and BH disabled, to make sure another thread or softirq handling
+ *	wont try to get same context.
+ */
+struct tcp_md5sig_pool *tcp_get_md5sig_pool(void)
 {
 	struct tcp_md5sig_pool * __percpu *p;
-	spin_lock_bh(&tcp_md5sig_pool_lock);
+
+	local_bh_disable();
+
+	spin_lock(&tcp_md5sig_pool_lock);
 	p = tcp_md5sig_pool;
 	if (p)
 		tcp_md5sig_users++;
-	spin_unlock_bh(&tcp_md5sig_pool_lock);
-	return (p ? *per_cpu_ptr(p, cpu) : NULL);
-}
+	spin_unlock(&tcp_md5sig_pool_lock);
+
+	if (p)
+		return *per_cpu_ptr(p, smp_processor_id());
 
-EXPORT_SYMBOL(__tcp_get_md5sig_pool);
+	local_bh_enable();
+	return NULL;
+}
+EXPORT_SYMBOL(tcp_get_md5sig_pool);
 
-void __tcp_put_md5sig_pool(void)
+void tcp_put_md5sig_pool(void)
 {
+	local_bh_enable();
 	tcp_free_md5sig_pool();
 }
-
-EXPORT_SYMBOL(__tcp_put_md5sig_pool);
+EXPORT_SYMBOL(tcp_put_md5sig_pool);
 
 int tcp_md5_hash_header(struct tcp_md5sig_pool *hp,
 			struct tcphdr *th)
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index d67501f..132046c 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -148,6 +148,10 @@ void sctp_transport_free(struct sctp_transport *transport)
 	    del_timer(&transport->T3_rtx_timer))
 		sctp_transport_put(transport);
 
+	/* Delete the ICMP proto unreachable timer if it's active. */
+	if (timer_pending(&transport->proto_unreach_timer) &&
+	    del_timer(&transport->proto_unreach_timer))
+		sctp_association_put(transport->asoc);
 
 	sctp_transport_put(transport);
 }