diff options
Diffstat (limited to 'net/core/dev.c')
-rw-r--r-- | net/core/dev.c | 44 |
1 files changed, 33 insertions, 11 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index ee61b98..94d9d6f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -119,6 +119,7 @@ #include <linux/err.h> #include <linux/ctype.h> #include <linux/if_arp.h> +#include <linux/if_vlan.h> #include "net-sysfs.h" @@ -453,7 +454,7 @@ static int netdev_boot_setup_add(char *name, struct ifmap *map) for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) { if (s[i].name[0] == '\0' || s[i].name[0] == ' ') { memset(s[i].name, 0, sizeof(s[i].name)); - strcpy(s[i].name, name); + strlcpy(s[i].name, name, IFNAMSIZ); memcpy(&s[i].map, map, sizeof(s[i].map)); break; } @@ -478,7 +479,7 @@ int netdev_boot_setup_check(struct net_device *dev) for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) { if (s[i].name[0] != '\0' && s[i].name[0] != ' ' && - !strncmp(dev->name, s[i].name, strlen(s[i].name))) { + !strcmp(dev->name, s[i].name)) { dev->irq = s[i].map.irq; dev->base_addr = s[i].map.base_addr; dev->mem_start = s[i].map.mem_start; @@ -1362,6 +1363,29 @@ void netif_device_attach(struct net_device *dev) } EXPORT_SYMBOL(netif_device_attach); +static bool can_checksum_protocol(unsigned long features, __be16 protocol) +{ + return ((features & NETIF_F_GEN_CSUM) || + ((features & NETIF_F_IP_CSUM) && + protocol == htons(ETH_P_IP)) || + ((features & NETIF_F_IPV6_CSUM) && + protocol == htons(ETH_P_IPV6))); +} + +static bool dev_can_checksum(struct net_device *dev, struct sk_buff *skb) +{ + if (can_checksum_protocol(dev->features, skb->protocol)) + return true; + + if (skb->protocol == htons(ETH_P_8021Q)) { + struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data; + if (can_checksum_protocol(dev->features & dev->vlan_features, + veh->h_vlan_encapsulated_proto)) + return true; + } + + return false; +} /* * Invalidate hardware checksum when packet is to be mangled, and @@ -1640,14 +1664,8 @@ int dev_queue_xmit(struct sk_buff *skb) if (skb->ip_summed == CHECKSUM_PARTIAL) { skb_set_transport_header(skb, skb->csum_start - skb_headroom(skb)); - - if (!(dev->features & NETIF_F_GEN_CSUM) && - !((dev->features & NETIF_F_IP_CSUM) && - skb->protocol == htons(ETH_P_IP)) && - !((dev->features & NETIF_F_IPV6_CSUM) && - skb->protocol == htons(ETH_P_IPV6))) - if (skb_checksum_help(skb)) - goto out_kfree_skb; + if (!dev_can_checksum(dev, skb) && skb_checksum_help(skb)) + goto out_kfree_skb; } gso: @@ -2059,6 +2077,10 @@ int netif_receive_skb(struct sk_buff *skb) rcu_read_lock(); + /* Don't receive packets in an exiting network namespace */ + if (!net_alive(dev_net(skb->dev))) + goto out; + #ifdef CONFIG_NET_CLS_ACT if (skb->tc_verd & TC_NCLS) { skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); @@ -2951,7 +2973,7 @@ EXPORT_SYMBOL(dev_unicast_delete); /** * dev_unicast_add - add a secondary unicast address * @dev: device - * @addr: address to delete + * @addr: address to add * @alen: length of @addr * * Add a secondary unicast address to the device or increase |