diff options
Diffstat (limited to 'net/8021q/vlan_dev.c')
| -rw-r--r-- | net/8021q/vlan_dev.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index b84a46b30c0c..d174c312b7f1 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -65,179 +65,6 @@ static int vlan_dev_rebuild_header(struct sk_buff *skb) return 0; } -static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) -{ - if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { - if (skb_cow(skb, skb_headroom(skb)) < 0) - skb = NULL; - if (skb) { - /* Lifted from Gleb's VLAN code... */ - memmove(skb->data - ETH_HLEN, - skb->data - VLAN_ETH_HLEN, 12); - skb->mac_header += VLAN_HLEN; - } - } - - return skb; -} - -static inline void vlan_set_encap_proto(struct sk_buff *skb, - struct vlan_hdr *vhdr) -{ - __be16 proto; - unsigned char *rawp; - - /* - * Was a VLAN packet, grab the encapsulated protocol, which the layer - * three protocols care about. - */ - - proto = vhdr->h_vlan_encapsulated_proto; - if (ntohs(proto) >= 1536) { - skb->protocol = proto; - return; - } - - rawp = skb->data; - if (*(unsigned short *)rawp == 0xFFFF) - /* - * This is a magic hack to spot IPX packets. Older Novell - * breaks the protocol design and runs IPX over 802.3 without - * an 802.2 LLC layer. We look for FFFF which isn't a used - * 802.2 SSAP/DSAP. This won't work for fault tolerant netware - * but does for the rest. - */ - skb->protocol = htons(ETH_P_802_3); - else - /* - * Real 802.2 LLC - */ - skb->protocol = htons(ETH_P_802_2); -} - -/* - * Determine the packet's protocol ID. The rule here is that we - * assume 802.3 if the type field is short enough to be a length. - * This is normal practice and works for any 'now in use' protocol. - * - * Also, at this point we assume that we ARE dealing exclusively with - * VLAN packets, or packets that should be made into VLAN packets based - * on a default VLAN ID. - * - * NOTE: Should be similar to ethernet/eth.c. - * - * SANITY NOTE: This method is called when a packet is moving up the stack - * towards userland. To get here, it would have already passed - * through the ethernet/eth.c eth_type_trans() method. - * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be - * stored UNALIGNED in the memory. RISC systems don't like - * such cases very much... - * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be - * aligned, so there doesn't need to be any of the unaligned - * stuff. It has been commented out now... --Ben - * - */ -int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *ptype, struct net_device *orig_dev) -{ - struct vlan_hdr *vhdr; - struct vlan_pcpu_stats *rx_stats; - struct net_device *vlan_dev; - u16 vlan_id; - u16 vlan_tci; - - skb = skb_share_check(skb, GFP_ATOMIC); - if (skb == NULL) - goto err_free; - - if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) - goto err_free; - - vhdr = (struct vlan_hdr *)skb->data; - vlan_tci = ntohs(vhdr->h_vlan_TCI); - vlan_id = vlan_tci & VLAN_VID_MASK; - - rcu_read_lock(); - vlan_dev = vlan_find_dev(dev, vlan_id); - - /* If the VLAN device is defined, we use it. - * If not, and the VID is 0, it is a 802.1p packet (not - * really a VLAN), so we will just netif_rx it later to the - * original interface, but with the skb->proto set to the - * wrapped proto: we do nothing here. - */ - - if (!vlan_dev) { - if (vlan_id) { - pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", - __func__, vlan_id, dev->name); - goto err_unlock; - } - rx_stats = NULL; - } else { - skb->dev = vlan_dev; - - rx_stats = this_cpu_ptr(vlan_dev_info(skb->dev)->vlan_pcpu_stats); - - u64_stats_update_begin(&rx_stats->syncp); - rx_stats->rx_packets++; - rx_stats->rx_bytes += skb->len; - - skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); - - pr_debug("%s: priority: %u for TCI: %hu\n", - __func__, skb->priority, vlan_tci); - - switch (skb->pkt_type) { - case PACKET_BROADCAST: - /* Yeah, stats collect these together.. */ - /* stats->broadcast ++; // no such counter :-( */ - break; - - case PACKET_MULTICAST: - rx_stats->rx_multicast++; - break; - - case PACKET_OTHERHOST: - /* Our lower layer thinks this is not local, let's make - * sure. - * This allows the VLAN to have a different MAC than the - * underlying device, and still route correctly. - */ - if (!compare_ether_addr(eth_hdr(skb)->h_dest, - skb->dev->dev_addr)) - skb->pkt_type = PACKET_HOST; - break; - default: - break; - } - u64_stats_update_end(&rx_stats->syncp); - } - - skb_pull_rcsum(skb, VLAN_HLEN); - vlan_set_encap_proto(skb, vhdr); - - if (vlan_dev) { - skb = vlan_check_reorder_header(skb); - if (!skb) { - rx_stats->rx_errors++; - goto err_unlock; - } - } - - netif_rx(skb); - - rcu_read_unlock(); - return NET_RX_SUCCESS; - -err_unlock: - rcu_read_unlock(); -err_free: - atomic_long_inc(&dev->rx_dropped); - kfree_skb(skb); - return NET_RX_DROP; -} - static inline u16 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) { |