Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...

[pandora-kernel.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index bdd1e88..c8569f8 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1136,8 +1136,8 @@ void dev_load(struct net *net, const char *name)
                no_module = request_module("netdev-%s", name);
        if (no_module && capable(CAP_SYS_MODULE)) {
                if (!request_module("%s", name))
-                       pr_err("Loading kernel module for a network device with CAP_SYS_MODULE (deprecated).  Use CAP_NET_ADMIN and alias netdev-%s instead.\n",
-                              name);
+                       pr_warn("Loading kernel module for a network device with CAP_SYS_MODULE (deprecated).  Use CAP_NET_ADMIN and alias netdev-%s instead.\n",
+                               name);
        }
 }
 EXPORT_SYMBOL(dev_load);
@@ -1633,6 +1633,8 @@ 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);
 }
@@ -1692,7 +1694,8 @@ 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
  *
@@ -1794,6 +1797,18 @@ 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;
@@ -2445,8 +2460,12 @@ 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 void skb_update_prio(struct sk_buff *skb)
 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
@@ -3138,8 +3174,6 @@ 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);
@@ -3151,6 +3185,7 @@ 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);
 
@@ -3229,7 +3264,10 @@ 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);
@@ -5645,7 +5683,7 @@ 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.
@@ -6282,7 +6320,8 @@ 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)