1 files changed, 47 insertions, 8 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 84f01ba81a34..0ebaea16632f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1632,6 +1632,8 @@ static inline int deliver_skb(struct sk_buff *skb,
                               struct packet_type *pt_prev,
                               struct net_device *orig_dev)
 {
+        if (unlikely(skb_orphan_frags(skb, GFP_ATOMIC)))
+                return -ENOMEM;
         atomic_inc(&skb->users);
         return pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
 }
@@ -1691,7 +1693,8 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
         rcu_read_unlock();
 }
 
-/* netif_setup_tc - Handle tc mappings on real_num_tx_queues change
+/**
+ * netif_setup_tc - Handle tc mappings on real_num_tx_queues change
  * @dev: Network device
  * @txq: number of queues available
  *
@@ -1793,6 +1796,18 @@ int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq)
 EXPORT_SYMBOL(netif_set_real_num_rx_queues);
 #endif
 
+/**
+ * netif_get_num_default_rss_queues - default number of RSS queues
+ *
+ * This routine should set an upper limit on the number of RSS queues
+ * used by default by multiqueue devices.
+ */
+int netif_get_num_default_rss_queues(void)
+{
+        return min_t(int, DEFAULT_MAX_NUM_RSS_QUEUES, num_online_cpus());
+}
+EXPORT_SYMBOL(netif_get_num_default_rss_queues);
+
 static inline void __netif_reschedule(struct Qdisc *q)
 {
         struct softnet_data *sd;
@@ -2444,8 +2459,12 @@ static void skb_update_prio(struct sk_buff *skb)
 {
         struct netprio_map *map = rcu_dereference_bh(skb->dev->priomap);
 
-        if ((!skb->priority) && (skb->sk) && map)
-                skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
+        if (!skb->priority && skb->sk && map) {
+                unsigned int prioidx = skb->sk->sk_cgrp_prioidx;
+
+                if (prioidx < map->priomap_len)
+                        skb->priority = map->priomap[prioidx];
+        }
 }
 #else
 #define skb_update_prio(skb)
@@ -2455,6 +2474,23 @@ static DEFINE_PER_CPU(int, xmit_recursion);
 #define RECURSION_LIMIT 10
 
 /**
+ *      dev_loopback_xmit - loop back @skb
+ *      @skb: buffer to transmit
+ */
+int dev_loopback_xmit(struct sk_buff *skb)
+{
+        skb_reset_mac_header(skb);
+        __skb_pull(skb, skb_network_offset(skb));
+        skb->pkt_type = PACKET_LOOPBACK;
+        skb->ip_summed = CHECKSUM_UNNECESSARY;
+        WARN_ON(!skb_dst(skb));
+        skb_dst_force(skb);
+        netif_rx_ni(skb);
+        return 0;
+}
+EXPORT_SYMBOL(dev_loopback_xmit);
+
+/**
  *      dev_queue_xmit - transmit a buffer
  *      @skb: buffer to transmit
  *
@@ -3137,8 +3173,6 @@ static int __netif_receive_skb(struct sk_buff *skb)
         if (netpoll_receive_skb(skb))
                 return NET_RX_DROP;
 
-        if (!skb->skb_iif)
-                skb->skb_iif = skb->dev->ifindex;
         orig_dev = skb->dev;
 
         skb_reset_network_header(skb);
@@ -3150,6 +3184,7 @@ static int __netif_receive_skb(struct sk_buff *skb)
         rcu_read_lock();
 
 another_round:
+        skb->skb_iif = skb->dev->ifindex;
 
         __this_cpu_inc(softnet_data.processed);
 
@@ -3228,7 +3263,10 @@ ncls:
         }
 
         if (pt_prev) {
-                ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
+                if (unlikely(skb_orphan_frags(skb, GFP_ATOMIC)))
+                        ret = -ENOMEM;
+                else
+                        ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
         } else {
                 atomic_long_inc(&skb->dev->rx_dropped);
                 kfree_skb(skb);
@@ -5642,7 +5680,7 @@ int netdev_refcnt_read(const struct net_device *dev)
 }
 EXPORT_SYMBOL(netdev_refcnt_read);
 
-/*
+/**
  * netdev_wait_allrefs - wait until all references are gone.
  *
  * This is called when unregistering network devices.
@@ -6279,7 +6317,8 @@ static struct hlist_head *netdev_create_hash(void)
 /* Initialize per network namespace state */
 static int __net_init netdev_init(struct net *net)
 {
-        INIT_LIST_HEAD(&net->dev_base_head);
+        if (net != &init_net)
+                INIT_LIST_HEAD(&net->dev_base_head);
 
         net->dev_name_head = netdev_create_hash();
         if (net->dev_name_head == NULL)