11da177e4SLinus Torvalds /* -*- linux-c -*- 21da177e4SLinus Torvalds * INET 802.1Q VLAN 31da177e4SLinus Torvalds * Ethernet-type device handling. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: Ben Greear <greearb@candelatech.com> 6ad712087SPatrick McHardy * Please send support related email to: netdev@vger.kernel.org 71da177e4SLinus Torvalds * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com> 101da177e4SLinus Torvalds * - reset skb->pkt_type on incoming packets when MAC was changed 111da177e4SLinus Torvalds * - see that changed MAC is saddr for outgoing packets 121da177e4SLinus Torvalds * Oct 20, 2001: Ard van Breeman: 131da177e4SLinus Torvalds * - Fix MC-list, finally. 141da177e4SLinus Torvalds * - Flush MC-list on VLAN destroy. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 181da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 191da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 201da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 211da177e4SLinus Torvalds */ 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/module.h> 241da177e4SLinus Torvalds #include <linux/mm.h> 251da177e4SLinus Torvalds #include <linux/in.h> 261da177e4SLinus Torvalds #include <linux/init.h> 271da177e4SLinus Torvalds #include <asm/uaccess.h> /* for copy_from_user */ 281da177e4SLinus Torvalds #include <linux/skbuff.h> 291da177e4SLinus Torvalds #include <linux/netdevice.h> 301da177e4SLinus Torvalds #include <linux/etherdevice.h> 311da177e4SLinus Torvalds #include <net/datalink.h> 321da177e4SLinus Torvalds #include <net/p8022.h> 331da177e4SLinus Torvalds #include <net/arp.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include "vlan.h" 361da177e4SLinus Torvalds #include "vlanproc.h" 371da177e4SLinus Torvalds #include <linux/if_vlan.h> 381da177e4SLinus Torvalds #include <net/ip.h> 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds /* 411da177e4SLinus Torvalds * Rebuild the Ethernet MAC header. This is called after an ARP 421da177e4SLinus Torvalds * (or in future other address resolution) has completed on this 431da177e4SLinus Torvalds * sk_buff. We now let ARP fill in the other fields. 441da177e4SLinus Torvalds * 451da177e4SLinus Torvalds * This routine CANNOT use cached dst->neigh! 461da177e4SLinus Torvalds * Really, it is used only when dst->neigh is wrong. 471da177e4SLinus Torvalds * 481da177e4SLinus Torvalds * TODO: This needs a checkup, I'm ignorant here. --BLG 491da177e4SLinus Torvalds */ 50ef3eb3e5SPatrick McHardy static int vlan_dev_rebuild_header(struct sk_buff *skb) 511da177e4SLinus Torvalds { 521da177e4SLinus Torvalds struct net_device *dev = skb->dev; 531da177e4SLinus Torvalds struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds switch (veth->h_vlan_encapsulated_proto) { 561da177e4SLinus Torvalds #ifdef CONFIG_INET 571da177e4SLinus Torvalds case __constant_htons(ETH_P_IP): 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* TODO: Confirm this will work with VLAN headers... */ 601da177e4SLinus Torvalds return arp_find(veth->h_dest, skb); 611da177e4SLinus Torvalds #endif 621da177e4SLinus Torvalds default: 6340f98e1aSPatrick McHardy pr_debug("%s: unable to resolve type %X addresses.\n", 64d136fe72SAlexey Dobriyan dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 671da177e4SLinus Torvalds break; 683ff50b79SStephen Hemminger } 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds return 0; 711da177e4SLinus Torvalds } 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) 741da177e4SLinus Torvalds { 759dfebcc6SPatrick McHardy if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { 761da177e4SLinus Torvalds if (skb_shared(skb) || skb_cloned(skb)) { 771da177e4SLinus Torvalds struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC); 781da177e4SLinus Torvalds kfree_skb(skb); 791da177e4SLinus Torvalds skb = nskb; 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds if (skb) { 821da177e4SLinus Torvalds /* Lifted from Gleb's VLAN code... */ 831da177e4SLinus Torvalds memmove(skb->data - ETH_HLEN, 841da177e4SLinus Torvalds skb->data - VLAN_ETH_HLEN, 12); 85b0e380b1SArnaldo Carvalho de Melo skb->mac_header += VLAN_HLEN; 861da177e4SLinus Torvalds } 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds return skb; 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds /* 931da177e4SLinus Torvalds * Determine the packet's protocol ID. The rule here is that we 941da177e4SLinus Torvalds * assume 802.3 if the type field is short enough to be a length. 951da177e4SLinus Torvalds * This is normal practice and works for any 'now in use' protocol. 961da177e4SLinus Torvalds * 971da177e4SLinus Torvalds * Also, at this point we assume that we ARE dealing exclusively with 981da177e4SLinus Torvalds * VLAN packets, or packets that should be made into VLAN packets based 991da177e4SLinus Torvalds * on a default VLAN ID. 1001da177e4SLinus Torvalds * 1011da177e4SLinus Torvalds * NOTE: Should be similar to ethernet/eth.c. 1021da177e4SLinus Torvalds * 1031da177e4SLinus Torvalds * SANITY NOTE: This method is called when a packet is moving up the stack 1041da177e4SLinus Torvalds * towards userland. To get here, it would have already passed 1051da177e4SLinus Torvalds * through the ethernet/eth.c eth_type_trans() method. 1061da177e4SLinus Torvalds * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be 1071da177e4SLinus Torvalds * stored UNALIGNED in the memory. RISC systems don't like 1081da177e4SLinus Torvalds * such cases very much... 1092029cc2cSPatrick McHardy * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be 1102029cc2cSPatrick McHardy * aligned, so there doesn't need to be any of the unaligned 1112029cc2cSPatrick McHardy * stuff. It has been commented out now... --Ben 1121da177e4SLinus Torvalds * 1131da177e4SLinus Torvalds */ 1141da177e4SLinus Torvalds int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, 115f2ccd8faSDavid S. Miller struct packet_type *ptype, struct net_device *orig_dev) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds unsigned char *rawp = NULL; 118e7c243c9SEvgeniy Polyakov struct vlan_hdr *vhdr; 1191da177e4SLinus Torvalds unsigned short vid; 1201da177e4SLinus Torvalds struct net_device_stats *stats; 1211da177e4SLinus Torvalds unsigned short vlan_TCI; 1223c3f8f25SAlexey Dobriyan __be16 proto; 1231da177e4SLinus Torvalds 124e730c155SEric W. Biederman if (dev->nd_net != &init_net) { 125e730c155SEric W. Biederman kfree_skb(skb); 126e730c155SEric W. Biederman return -1; 127e730c155SEric W. Biederman } 128e730c155SEric W. Biederman 1292029cc2cSPatrick McHardy skb = skb_share_check(skb, GFP_ATOMIC); 1302029cc2cSPatrick McHardy if (skb == NULL) 131e7c243c9SEvgeniy Polyakov return -1; 132e7c243c9SEvgeniy Polyakov 133e7c243c9SEvgeniy Polyakov if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) { 134e7c243c9SEvgeniy Polyakov kfree_skb(skb); 135e7c243c9SEvgeniy Polyakov return -1; 136e7c243c9SEvgeniy Polyakov } 137e7c243c9SEvgeniy Polyakov 138e7c243c9SEvgeniy Polyakov vhdr = (struct vlan_hdr *)(skb->data); 139e7c243c9SEvgeniy Polyakov 1401da177e4SLinus Torvalds /* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */ 1411da177e4SLinus Torvalds vlan_TCI = ntohs(vhdr->h_vlan_TCI); 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds vid = (vlan_TCI & VLAN_VID_MASK); 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds /* Ok, we will find the correct VLAN device, strip the header, 1461da177e4SLinus Torvalds * and then go on as usual. 1471da177e4SLinus Torvalds */ 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds /* We have 12 bits of vlan ID. 1501da177e4SLinus Torvalds * 1511da177e4SLinus Torvalds * We must not drop allow preempt until we hold a 1521da177e4SLinus Torvalds * reference to the device (netif_rx does that) or we 1531da177e4SLinus Torvalds * fail. 1541da177e4SLinus Torvalds */ 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds rcu_read_lock(); 1571da177e4SLinus Torvalds skb->dev = __find_vlan_dev(dev, vid); 1581da177e4SLinus Torvalds if (!skb->dev) { 1591da177e4SLinus Torvalds rcu_read_unlock(); 1602029cc2cSPatrick McHardy pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", 1612029cc2cSPatrick McHardy __FUNCTION__, (unsigned int)vid, dev->name); 1621da177e4SLinus Torvalds kfree_skb(skb); 1631da177e4SLinus Torvalds return -1; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds skb->dev->last_rx = jiffies; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* Bump the rx counters for the VLAN device. */ 1697bd38d77SPatrick McHardy stats = &skb->dev->stats; 1701da177e4SLinus Torvalds stats->rx_packets++; 1711da177e4SLinus Torvalds stats->rx_bytes += skb->len; 1721da177e4SLinus Torvalds 173cbb042f9SHerbert Xu /* Take off the VLAN header (4 bytes currently) */ 174cbb042f9SHerbert Xu skb_pull_rcsum(skb, VLAN_HLEN); 175a388442cSStephen Hemminger 1761da177e4SLinus Torvalds /* 1771da177e4SLinus Torvalds * Deal with ingress priority mapping. 1781da177e4SLinus Torvalds */ 1792029cc2cSPatrick McHardy skb->priority = vlan_get_ingress_priority(skb->dev, 1802029cc2cSPatrick McHardy ntohs(vhdr->h_vlan_TCI)); 1811da177e4SLinus Torvalds 18240f98e1aSPatrick McHardy pr_debug("%s: priority: %u for TCI: %hu\n", 18340f98e1aSPatrick McHardy __FUNCTION__, skb->priority, ntohs(vhdr->h_vlan_TCI)); 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* The ethernet driver already did the pkt_type calculations 1861da177e4SLinus Torvalds * for us... 1871da177e4SLinus Torvalds */ 1881da177e4SLinus Torvalds switch (skb->pkt_type) { 1891da177e4SLinus Torvalds case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 1902029cc2cSPatrick McHardy /* stats->broadcast ++; // no such counter :-( */ 1911da177e4SLinus Torvalds break; 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds case PACKET_MULTICAST: 1941da177e4SLinus Torvalds stats->multicast++; 1951da177e4SLinus Torvalds break; 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds case PACKET_OTHERHOST: 1981da177e4SLinus Torvalds /* Our lower layer thinks this is not local, let's make sure. 1992029cc2cSPatrick McHardy * This allows the VLAN to have a different MAC than the 2002029cc2cSPatrick McHardy * underlying device, and still route correctly. 2011da177e4SLinus Torvalds */ 2022029cc2cSPatrick McHardy if (!compare_ether_addr(eth_hdr(skb)->h_dest, 2032029cc2cSPatrick McHardy skb->dev->dev_addr)) 2041da177e4SLinus Torvalds /* It is for our (changed) MAC-address! */ 2051da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 2061da177e4SLinus Torvalds break; 2071da177e4SLinus Torvalds default: 2081da177e4SLinus Torvalds break; 2093ff50b79SStephen Hemminger } 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds /* Was a VLAN packet, grab the encapsulated protocol, which the layer 2121da177e4SLinus Torvalds * three protocols care about. 2131da177e4SLinus Torvalds */ 2141da177e4SLinus Torvalds /* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */ 2151da177e4SLinus Torvalds proto = vhdr->h_vlan_encapsulated_proto; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds skb->protocol = proto; 2181da177e4SLinus Torvalds if (ntohs(proto) >= 1536) { 2191da177e4SLinus Torvalds /* place it back on the queue to be handled by 2201da177e4SLinus Torvalds * true layer 3 protocols. 2211da177e4SLinus Torvalds */ 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds /* See if we are configured to re-write the VLAN header 2241da177e4SLinus Torvalds * to make it look like ethernet... 2251da177e4SLinus Torvalds */ 2261da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds /* Can be null if skb-clone fails when re-ordering */ 2291da177e4SLinus Torvalds if (skb) { 2301da177e4SLinus Torvalds netif_rx(skb); 2311da177e4SLinus Torvalds } else { 2321da177e4SLinus Torvalds /* TODO: Add a more specific counter here. */ 2331da177e4SLinus Torvalds stats->rx_errors++; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds rcu_read_unlock(); 2361da177e4SLinus Torvalds return 0; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds rawp = skb->data; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds /* 2421da177e4SLinus Torvalds * This is a magic hack to spot IPX packets. Older Novell breaks 2431da177e4SLinus Torvalds * the protocol design and runs IPX over 802.3 without an 802.2 LLC 2441da177e4SLinus Torvalds * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 2451da177e4SLinus Torvalds * won't work for fault tolerant netware but does for the rest. 2461da177e4SLinus Torvalds */ 2471da177e4SLinus Torvalds if (*(unsigned short *)rawp == 0xFFFF) { 248b93b7eebSYOSHIFUJI Hideaki skb->protocol = htons(ETH_P_802_3); 2492029cc2cSPatrick McHardy /* place it back on the queue to be handled by true layer 3 2502029cc2cSPatrick McHardy * protocols. */ 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds /* See if we are configured to re-write the VLAN header 2531da177e4SLinus Torvalds * to make it look like ethernet... 2541da177e4SLinus Torvalds */ 2551da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds /* Can be null if skb-clone fails when re-ordering */ 2581da177e4SLinus Torvalds if (skb) { 2591da177e4SLinus Torvalds netif_rx(skb); 2601da177e4SLinus Torvalds } else { 2611da177e4SLinus Torvalds /* TODO: Add a more specific counter here. */ 2621da177e4SLinus Torvalds stats->rx_errors++; 2631da177e4SLinus Torvalds } 2641da177e4SLinus Torvalds rcu_read_unlock(); 2651da177e4SLinus Torvalds return 0; 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds /* 2691da177e4SLinus Torvalds * Real 802.2 LLC 2701da177e4SLinus Torvalds */ 271b93b7eebSYOSHIFUJI Hideaki skb->protocol = htons(ETH_P_802_2); 2721da177e4SLinus Torvalds /* place it back on the queue to be handled by upper layer protocols. 2731da177e4SLinus Torvalds */ 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds /* See if we are configured to re-write the VLAN header 2761da177e4SLinus Torvalds * to make it look like ethernet... 2771da177e4SLinus Torvalds */ 2781da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds /* Can be null if skb-clone fails when re-ordering */ 2811da177e4SLinus Torvalds if (skb) { 2821da177e4SLinus Torvalds netif_rx(skb); 2831da177e4SLinus Torvalds } else { 2841da177e4SLinus Torvalds /* TODO: Add a more specific counter here. */ 2851da177e4SLinus Torvalds stats->rx_errors++; 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds rcu_read_unlock(); 2881da177e4SLinus Torvalds return 0; 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds 2912029cc2cSPatrick McHardy static inline unsigned short 2922029cc2cSPatrick McHardy vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 2931da177e4SLinus Torvalds { 2942029cc2cSPatrick McHardy struct vlan_priority_tci_mapping *mp; 2951da177e4SLinus Torvalds 2962029cc2cSPatrick McHardy mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; 2971da177e4SLinus Torvalds while (mp) { 2981da177e4SLinus Torvalds if (mp->priority == skb->priority) { 2992029cc2cSPatrick McHardy return mp->vlan_qos; /* This should already be shifted 3002029cc2cSPatrick McHardy * to mask correctly with the 3012029cc2cSPatrick McHardy * VLAN's TCI */ 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds mp = mp->next; 3041da177e4SLinus Torvalds } 3051da177e4SLinus Torvalds return 0; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds /* 3091da177e4SLinus Torvalds * Create the VLAN header for an arbitrary protocol layer 3101da177e4SLinus Torvalds * 3111da177e4SLinus Torvalds * saddr=NULL means use device source address 3121da177e4SLinus Torvalds * daddr=NULL means leave destination address (eg unresolved arp) 3131da177e4SLinus Torvalds * 3141da177e4SLinus Torvalds * This is called when the SKB is moving down the stack towards the 3151da177e4SLinus Torvalds * physical devices. 3161da177e4SLinus Torvalds */ 317ef3eb3e5SPatrick McHardy static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 3183b04dddeSStephen Hemminger unsigned short type, 319ef3eb3e5SPatrick McHardy const void *daddr, const void *saddr, 320ef3eb3e5SPatrick McHardy unsigned int len) 3211da177e4SLinus Torvalds { 3221da177e4SLinus Torvalds struct vlan_hdr *vhdr; 3231da177e4SLinus Torvalds unsigned short veth_TCI = 0; 3241da177e4SLinus Torvalds int rc = 0; 3251da177e4SLinus Torvalds int build_vlan_header = 0; 3262029cc2cSPatrick McHardy struct net_device *vdev = dev; 3271da177e4SLinus Torvalds 32840f98e1aSPatrick McHardy pr_debug("%s: skb: %p type: %hx len: %u vlan_id: %hx, daddr: %p\n", 3292029cc2cSPatrick McHardy __FUNCTION__, skb, type, len, vlan_dev_info(dev)->vlan_id, 3302029cc2cSPatrick McHardy daddr); 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds /* build vlan header only if re_order_header flag is NOT set. This 3331da177e4SLinus Torvalds * fixes some programs that get confused when they see a VLAN device 3341da177e4SLinus Torvalds * sending a frame that is VLAN encoded (the consensus is that the VLAN 3351da177e4SLinus Torvalds * device should look completely like an Ethernet device when the 3361da177e4SLinus Torvalds * REORDER_HEADER flag is set) The drawback to this is some extra 3371da177e4SLinus Torvalds * header shuffling in the hard_start_xmit. Users can turn off this 3381da177e4SLinus Torvalds * REORDER behaviour with the vconfig tool. 3391da177e4SLinus Torvalds */ 3409dfebcc6SPatrick McHardy if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) 341a4bf3af4SPatrick McHardy build_vlan_header = 1; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds if (build_vlan_header) { 3441da177e4SLinus Torvalds vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds /* build the four bytes that make this a VLAN header. */ 3471da177e4SLinus Torvalds 3482029cc2cSPatrick McHardy /* Now, construct the second two bytes. This field looks 3492029cc2cSPatrick McHardy * something like: 3501da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 3511da177e4SLinus Torvalds * CFI 1 bit 3521da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 3531da177e4SLinus Torvalds * 3541da177e4SLinus Torvalds */ 3559dfebcc6SPatrick McHardy veth_TCI = vlan_dev_info(dev)->vlan_id; 3561da177e4SLinus Torvalds veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds vhdr->h_vlan_TCI = htons(veth_TCI); 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds /* 3612029cc2cSPatrick McHardy * Set the protocol type. For a packet of type ETH_P_802_3 we 3622029cc2cSPatrick McHardy * put the length in here instead. It is up to the 802.2 3632029cc2cSPatrick McHardy * layer to carry protocol information. 3641da177e4SLinus Torvalds */ 3651da177e4SLinus Torvalds 3662029cc2cSPatrick McHardy if (type != ETH_P_802_3) 3671da177e4SLinus Torvalds vhdr->h_vlan_encapsulated_proto = htons(type); 3682029cc2cSPatrick McHardy else 3691da177e4SLinus Torvalds vhdr->h_vlan_encapsulated_proto = htons(len); 370279e172aSJerome Borsboom 371279e172aSJerome Borsboom skb->protocol = htons(ETH_P_8021Q); 372be8bd863SDavid S. Miller skb_reset_network_header(skb); 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds /* Before delegating work to the lower layer, enter our MAC-address */ 3761da177e4SLinus Torvalds if (saddr == NULL) 3771da177e4SLinus Torvalds saddr = dev->dev_addr; 3781da177e4SLinus Torvalds 3799dfebcc6SPatrick McHardy dev = vlan_dev_info(dev)->real_dev; 3801da177e4SLinus Torvalds 3812029cc2cSPatrick McHardy /* MPLS can send us skbuffs w/out enough space. This check will grow 3822029cc2cSPatrick McHardy * the skb if it doesn't have enough headroom. Not a beautiful solution, 3832029cc2cSPatrick McHardy * so I'll tick a counter so that users can know it's happening... 3842029cc2cSPatrick McHardy * If they care... 3851da177e4SLinus Torvalds */ 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* NOTE: This may still break if the underlying device is not the final 3881da177e4SLinus Torvalds * device (and thus there are more headers to add...) It should work for 3891da177e4SLinus Torvalds * good-ole-ethernet though. 3901da177e4SLinus Torvalds */ 3911da177e4SLinus Torvalds if (skb_headroom(skb) < dev->hard_header_len) { 3921da177e4SLinus Torvalds struct sk_buff *sk_tmp = skb; 3931da177e4SLinus Torvalds skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); 3941da177e4SLinus Torvalds kfree_skb(sk_tmp); 3951da177e4SLinus Torvalds if (skb == NULL) { 3967bd38d77SPatrick McHardy struct net_device_stats *stats = &vdev->stats; 3971da177e4SLinus Torvalds stats->tx_dropped++; 3981da177e4SLinus Torvalds return -ENOMEM; 3991da177e4SLinus Torvalds } 4009dfebcc6SPatrick McHardy vlan_dev_info(vdev)->cnt_inc_headroom_on_tx++; 4012029cc2cSPatrick McHardy pr_debug("%s: %s: had to grow skb\n", __FUNCTION__, vdev->name); 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds if (build_vlan_header) { 4051da177e4SLinus Torvalds /* Now make the underlying real hard header */ 4060c4e8581SStephen Hemminger rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, 4070c4e8581SStephen Hemminger len + VLAN_HLEN); 4080c4e8581SStephen Hemminger if (rc > 0) 4091da177e4SLinus Torvalds rc += VLAN_HLEN; 4100c4e8581SStephen Hemminger else if (rc < 0) 4111da177e4SLinus Torvalds rc -= VLAN_HLEN; 4120c4e8581SStephen Hemminger } else 4132029cc2cSPatrick McHardy /* If here, then we'll just make a normal looking ethernet 4142029cc2cSPatrick McHardy * frame, but, the hard_start_xmit method will insert the tag 4152029cc2cSPatrick McHardy * (it has to be able to do this for bridged and other skbs 4162029cc2cSPatrick McHardy * that don't come down the protocol stack in an orderly manner. 4171da177e4SLinus Torvalds */ 4180c4e8581SStephen Hemminger rc = dev_hard_header(skb, dev, type, daddr, saddr, len); 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds return rc; 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 423ef3eb3e5SPatrick McHardy static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 4241da177e4SLinus Torvalds { 4257bd38d77SPatrick McHardy struct net_device_stats *stats = &dev->stats; 4261da177e4SLinus Torvalds struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 4291da177e4SLinus Torvalds * 4301da177e4SLinus Torvalds * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 4311da177e4SLinus Torvalds * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 4321da177e4SLinus Torvalds */ 4331da177e4SLinus Torvalds 4346ab3b487SJoonwoo Park if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 4359dfebcc6SPatrick McHardy vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { 4361da177e4SLinus Torvalds int orig_headroom = skb_headroom(skb); 4371da177e4SLinus Torvalds unsigned short veth_TCI; 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* This is not a VLAN frame...but we can fix that! */ 4409dfebcc6SPatrick McHardy vlan_dev_info(dev)->cnt_encap_on_xmit++; 4411da177e4SLinus Torvalds 44240f98e1aSPatrick McHardy pr_debug("%s: proto to encap: 0x%hx\n", 4431da177e4SLinus Torvalds __FUNCTION__, htons(veth->h_vlan_proto)); 4441da177e4SLinus Torvalds /* Construct the second two bytes. This field looks something 4451da177e4SLinus Torvalds * like: 4461da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 4471da177e4SLinus Torvalds * CFI 1 bit 4481da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 4491da177e4SLinus Torvalds */ 4509dfebcc6SPatrick McHardy veth_TCI = vlan_dev_info(dev)->vlan_id; 4511da177e4SLinus Torvalds veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds skb = __vlan_put_tag(skb, veth_TCI); 4541da177e4SLinus Torvalds if (!skb) { 4551da177e4SLinus Torvalds stats->tx_dropped++; 4561da177e4SLinus Torvalds return 0; 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds 4592029cc2cSPatrick McHardy if (orig_headroom < VLAN_HLEN) 4609dfebcc6SPatrick McHardy vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; 4611da177e4SLinus Torvalds } 4621da177e4SLinus Torvalds 46340f98e1aSPatrick McHardy pr_debug("%s: about to send skb: %p to dev: %s\n", 4641da177e4SLinus Torvalds __FUNCTION__, skb, skb->dev->name); 46540f98e1aSPatrick McHardy pr_debug(" " MAC_FMT " " MAC_FMT " %4hx %4hx %4hx\n", 46640f98e1aSPatrick McHardy veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], 46740f98e1aSPatrick McHardy veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], 46840f98e1aSPatrick McHardy veth->h_source[0], veth->h_source[1], veth->h_source[2], 46940f98e1aSPatrick McHardy veth->h_source[3], veth->h_source[4], veth->h_source[5], 47040f98e1aSPatrick McHardy veth->h_vlan_proto, veth->h_vlan_TCI, 47140f98e1aSPatrick McHardy veth->h_vlan_encapsulated_proto); 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds stats->tx_packets++; /* for statics only */ 4741da177e4SLinus Torvalds stats->tx_bytes += skb->len; 4751da177e4SLinus Torvalds 4769dfebcc6SPatrick McHardy skb->dev = vlan_dev_info(dev)->real_dev; 4771da177e4SLinus Torvalds dev_queue_xmit(skb); 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds return 0; 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds 482ef3eb3e5SPatrick McHardy static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, 483ef3eb3e5SPatrick McHardy struct net_device *dev) 4841da177e4SLinus Torvalds { 4857bd38d77SPatrick McHardy struct net_device_stats *stats = &dev->stats; 4861da177e4SLinus Torvalds unsigned short veth_TCI; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds /* Construct the second two bytes. This field looks something 4891da177e4SLinus Torvalds * like: 4901da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 4911da177e4SLinus Torvalds * CFI 1 bit 4921da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 4931da177e4SLinus Torvalds */ 4949dfebcc6SPatrick McHardy veth_TCI = vlan_dev_info(dev)->vlan_id; 4951da177e4SLinus Torvalds veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 4961da177e4SLinus Torvalds skb = __vlan_hwaccel_put_tag(skb, veth_TCI); 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds stats->tx_packets++; 4991da177e4SLinus Torvalds stats->tx_bytes += skb->len; 5001da177e4SLinus Torvalds 5019dfebcc6SPatrick McHardy skb->dev = vlan_dev_info(dev)->real_dev; 5021da177e4SLinus Torvalds dev_queue_xmit(skb); 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds return 0; 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 507ef3eb3e5SPatrick McHardy static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 5081da177e4SLinus Torvalds { 5091da177e4SLinus Torvalds /* TODO: gotta make sure the underlying layer can handle it, 5101da177e4SLinus Torvalds * maybe an IFF_VLAN_CAPABLE flag for devices? 5111da177e4SLinus Torvalds */ 5129dfebcc6SPatrick McHardy if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) 5131da177e4SLinus Torvalds return -ERANGE; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds dev->mtu = new_mtu; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds return 0; 5181da177e4SLinus Torvalds } 5191da177e4SLinus Torvalds 520c17d8874SPatrick McHardy void vlan_dev_set_ingress_priority(const struct net_device *dev, 521c17d8874SPatrick McHardy u32 skb_prio, short vlan_prio) 5221da177e4SLinus Torvalds { 5239dfebcc6SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 524b020cb48SPatrick McHardy 525b020cb48SPatrick McHardy if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 526b020cb48SPatrick McHardy vlan->nr_ingress_mappings--; 527b020cb48SPatrick McHardy else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 528b020cb48SPatrick McHardy vlan->nr_ingress_mappings++; 529b020cb48SPatrick McHardy 530b020cb48SPatrick McHardy vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 533c17d8874SPatrick McHardy int vlan_dev_set_egress_priority(const struct net_device *dev, 534c17d8874SPatrick McHardy u32 skb_prio, short vlan_prio) 5351da177e4SLinus Torvalds { 5369dfebcc6SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 5371da177e4SLinus Torvalds struct vlan_priority_tci_mapping *mp = NULL; 5381da177e4SLinus Torvalds struct vlan_priority_tci_mapping *np; 539b020cb48SPatrick McHardy u32 vlan_qos = (vlan_prio << 13) & 0xE000; 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds /* See if a priority mapping exists.. */ 542b020cb48SPatrick McHardy mp = vlan->egress_priority_map[skb_prio & 0xF]; 5431da177e4SLinus Torvalds while (mp) { 5441da177e4SLinus Torvalds if (mp->priority == skb_prio) { 545b020cb48SPatrick McHardy if (mp->vlan_qos && !vlan_qos) 546b020cb48SPatrick McHardy vlan->nr_egress_mappings--; 547b020cb48SPatrick McHardy else if (!mp->vlan_qos && vlan_qos) 548b020cb48SPatrick McHardy vlan->nr_egress_mappings++; 549b020cb48SPatrick McHardy mp->vlan_qos = vlan_qos; 5501da177e4SLinus Torvalds return 0; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds mp = mp->next; 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds /* Create a new mapping then. */ 556b020cb48SPatrick McHardy mp = vlan->egress_priority_map[skb_prio & 0xF]; 5571da177e4SLinus Torvalds np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 558c17d8874SPatrick McHardy if (!np) 559c17d8874SPatrick McHardy return -ENOBUFS; 560c17d8874SPatrick McHardy 5611da177e4SLinus Torvalds np->next = mp; 5621da177e4SLinus Torvalds np->priority = skb_prio; 563b020cb48SPatrick McHardy np->vlan_qos = vlan_qos; 564b020cb48SPatrick McHardy vlan->egress_priority_map[skb_prio & 0xF] = np; 565b020cb48SPatrick McHardy if (vlan_qos) 566b020cb48SPatrick McHardy vlan->nr_egress_mappings++; 5671da177e4SLinus Torvalds return 0; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds 570a4bf3af4SPatrick McHardy /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 571c17d8874SPatrick McHardy int vlan_dev_set_vlan_flag(const struct net_device *dev, 572c17d8874SPatrick McHardy u32 flag, short flag_val) 5731da177e4SLinus Torvalds { 5741da177e4SLinus Torvalds /* verify flag is supported */ 575a4bf3af4SPatrick McHardy if (flag == VLAN_FLAG_REORDER_HDR) { 5762029cc2cSPatrick McHardy if (flag_val) 5779dfebcc6SPatrick McHardy vlan_dev_info(dev)->flags |= VLAN_FLAG_REORDER_HDR; 5782029cc2cSPatrick McHardy else 5799dfebcc6SPatrick McHardy vlan_dev_info(dev)->flags &= ~VLAN_FLAG_REORDER_HDR; 5801da177e4SLinus Torvalds return 0; 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds return -EINVAL; 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 585c17d8874SPatrick McHardy void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 5861da177e4SLinus Torvalds { 5879dfebcc6SPatrick McHardy strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 590c17d8874SPatrick McHardy void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result) 5911da177e4SLinus Torvalds { 5929dfebcc6SPatrick McHardy *result = vlan_dev_info(dev)->vlan_id; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 595ef3eb3e5SPatrick McHardy static int vlan_dev_open(struct net_device *dev) 5961da177e4SLinus Torvalds { 5979dfebcc6SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 5988c979c26SPatrick McHardy struct net_device *real_dev = vlan->real_dev; 5998c979c26SPatrick McHardy int err; 6008c979c26SPatrick McHardy 6018c979c26SPatrick McHardy if (!(real_dev->flags & IFF_UP)) 6021da177e4SLinus Torvalds return -ENETDOWN; 6031da177e4SLinus Torvalds 6048c979c26SPatrick McHardy if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 6058c979c26SPatrick McHardy err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); 6068c979c26SPatrick McHardy if (err < 0) 6078c979c26SPatrick McHardy return err; 6088c979c26SPatrick McHardy } 6098c979c26SPatrick McHardy memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 6108c979c26SPatrick McHardy 6116c78dcbdSPatrick McHardy if (dev->flags & IFF_ALLMULTI) 6126c78dcbdSPatrick McHardy dev_set_allmulti(real_dev, 1); 6136c78dcbdSPatrick McHardy if (dev->flags & IFF_PROMISC) 6146c78dcbdSPatrick McHardy dev_set_promiscuity(real_dev, 1); 6156c78dcbdSPatrick McHardy 6161da177e4SLinus Torvalds return 0; 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds 619ef3eb3e5SPatrick McHardy static int vlan_dev_stop(struct net_device *dev) 6201da177e4SLinus Torvalds { 6219dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 6228c979c26SPatrick McHardy 62356addd6eSPatrick McHardy dev_mc_unsync(real_dev, dev); 6246c78dcbdSPatrick McHardy if (dev->flags & IFF_ALLMULTI) 6256c78dcbdSPatrick McHardy dev_set_allmulti(real_dev, -1); 6266c78dcbdSPatrick McHardy if (dev->flags & IFF_PROMISC) 6276c78dcbdSPatrick McHardy dev_set_promiscuity(real_dev, -1); 6286c78dcbdSPatrick McHardy 6298c979c26SPatrick McHardy if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 6308c979c26SPatrick McHardy dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); 6318c979c26SPatrick McHardy 6321da177e4SLinus Torvalds return 0; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 635ef3eb3e5SPatrick McHardy static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 63639aaac11SPatrick McHardy { 6379dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 63839aaac11SPatrick McHardy struct sockaddr *addr = p; 63939aaac11SPatrick McHardy int err; 64039aaac11SPatrick McHardy 64139aaac11SPatrick McHardy if (!is_valid_ether_addr(addr->sa_data)) 64239aaac11SPatrick McHardy return -EADDRNOTAVAIL; 64339aaac11SPatrick McHardy 64439aaac11SPatrick McHardy if (!(dev->flags & IFF_UP)) 64539aaac11SPatrick McHardy goto out; 64639aaac11SPatrick McHardy 64739aaac11SPatrick McHardy if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { 64839aaac11SPatrick McHardy err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); 64939aaac11SPatrick McHardy if (err < 0) 65039aaac11SPatrick McHardy return err; 65139aaac11SPatrick McHardy } 65239aaac11SPatrick McHardy 65339aaac11SPatrick McHardy if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 65439aaac11SPatrick McHardy dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); 65539aaac11SPatrick McHardy 65639aaac11SPatrick McHardy out: 65739aaac11SPatrick McHardy memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 65839aaac11SPatrick McHardy return 0; 65939aaac11SPatrick McHardy } 66039aaac11SPatrick McHardy 661ef3eb3e5SPatrick McHardy static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 6621da177e4SLinus Torvalds { 6639dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 6641da177e4SLinus Torvalds struct ifreq ifrr; 6651da177e4SLinus Torvalds int err = -EOPNOTSUPP; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 6681da177e4SLinus Torvalds ifrr.ifr_ifru = ifr->ifr_ifru; 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds switch (cmd) { 6711da177e4SLinus Torvalds case SIOCGMIIPHY: 6721da177e4SLinus Torvalds case SIOCGMIIREG: 6731da177e4SLinus Torvalds case SIOCSMIIREG: 6741da177e4SLinus Torvalds if (real_dev->do_ioctl && netif_device_present(real_dev)) 6751da177e4SLinus Torvalds err = real_dev->do_ioctl(real_dev, &ifrr, cmd); 6761da177e4SLinus Torvalds break; 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds if (!err) 6801da177e4SLinus Torvalds ifr->ifr_ifru = ifrr.ifr_ifru; 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds return err; 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 685ef3eb3e5SPatrick McHardy static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 6866c78dcbdSPatrick McHardy { 6879dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 6886c78dcbdSPatrick McHardy 6896c78dcbdSPatrick McHardy if (change & IFF_ALLMULTI) 6906c78dcbdSPatrick McHardy dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 6916c78dcbdSPatrick McHardy if (change & IFF_PROMISC) 6926c78dcbdSPatrick McHardy dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 6936c78dcbdSPatrick McHardy } 6946c78dcbdSPatrick McHardy 695ef3eb3e5SPatrick McHardy static void vlan_dev_set_multicast_list(struct net_device *vlan_dev) 6961da177e4SLinus Torvalds { 6979dfebcc6SPatrick McHardy dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 6981da177e4SLinus Torvalds } 699ef3eb3e5SPatrick McHardy 700ef3eb3e5SPatrick McHardy /* 701ef3eb3e5SPatrick McHardy * vlan network devices have devices nesting below it, and are a special 702ef3eb3e5SPatrick McHardy * "super class" of normal network devices; split their locks off into a 703ef3eb3e5SPatrick McHardy * separate class since they always nest. 704ef3eb3e5SPatrick McHardy */ 705ef3eb3e5SPatrick McHardy static struct lock_class_key vlan_netdev_xmit_lock_key; 706ef3eb3e5SPatrick McHardy 707ef3eb3e5SPatrick McHardy static const struct header_ops vlan_header_ops = { 708ef3eb3e5SPatrick McHardy .create = vlan_dev_hard_header, 709ef3eb3e5SPatrick McHardy .rebuild = vlan_dev_rebuild_header, 710ef3eb3e5SPatrick McHardy .parse = eth_header_parse, 711ef3eb3e5SPatrick McHardy }; 712ef3eb3e5SPatrick McHardy 713ef3eb3e5SPatrick McHardy static int vlan_dev_init(struct net_device *dev) 714ef3eb3e5SPatrick McHardy { 7159dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 716ef3eb3e5SPatrick McHardy int subclass = 0; 717ef3eb3e5SPatrick McHardy 718ef3eb3e5SPatrick McHardy /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 719ef3eb3e5SPatrick McHardy dev->flags = real_dev->flags & ~IFF_UP; 720ef3eb3e5SPatrick McHardy dev->iflink = real_dev->ifindex; 721ef3eb3e5SPatrick McHardy dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 722ef3eb3e5SPatrick McHardy (1<<__LINK_STATE_DORMANT))) | 723ef3eb3e5SPatrick McHardy (1<<__LINK_STATE_PRESENT); 724ef3eb3e5SPatrick McHardy 725ef3eb3e5SPatrick McHardy /* ipv6 shared card related stuff */ 726ef3eb3e5SPatrick McHardy dev->dev_id = real_dev->dev_id; 727ef3eb3e5SPatrick McHardy 728ef3eb3e5SPatrick McHardy if (is_zero_ether_addr(dev->dev_addr)) 729ef3eb3e5SPatrick McHardy memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 730ef3eb3e5SPatrick McHardy if (is_zero_ether_addr(dev->broadcast)) 731ef3eb3e5SPatrick McHardy memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 732ef3eb3e5SPatrick McHardy 733ef3eb3e5SPatrick McHardy if (real_dev->features & NETIF_F_HW_VLAN_TX) { 734ef3eb3e5SPatrick McHardy dev->header_ops = real_dev->header_ops; 735ef3eb3e5SPatrick McHardy dev->hard_header_len = real_dev->hard_header_len; 736ef3eb3e5SPatrick McHardy dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 737ef3eb3e5SPatrick McHardy } else { 738ef3eb3e5SPatrick McHardy dev->header_ops = &vlan_header_ops; 739ef3eb3e5SPatrick McHardy dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 740ef3eb3e5SPatrick McHardy dev->hard_start_xmit = vlan_dev_hard_start_xmit; 741ef3eb3e5SPatrick McHardy } 742ef3eb3e5SPatrick McHardy 743ef3eb3e5SPatrick McHardy if (real_dev->priv_flags & IFF_802_1Q_VLAN) 744ef3eb3e5SPatrick McHardy subclass = 1; 745ef3eb3e5SPatrick McHardy 746ef3eb3e5SPatrick McHardy lockdep_set_class_and_subclass(&dev->_xmit_lock, 747ef3eb3e5SPatrick McHardy &vlan_netdev_xmit_lock_key, subclass); 748ef3eb3e5SPatrick McHardy return 0; 749ef3eb3e5SPatrick McHardy } 750ef3eb3e5SPatrick McHardy 751ef3eb3e5SPatrick McHardy void vlan_setup(struct net_device *dev) 752ef3eb3e5SPatrick McHardy { 753ef3eb3e5SPatrick McHardy ether_setup(dev); 754ef3eb3e5SPatrick McHardy 755ef3eb3e5SPatrick McHardy dev->priv_flags |= IFF_802_1Q_VLAN; 756ef3eb3e5SPatrick McHardy dev->tx_queue_len = 0; 757ef3eb3e5SPatrick McHardy 758ef3eb3e5SPatrick McHardy dev->change_mtu = vlan_dev_change_mtu; 759ef3eb3e5SPatrick McHardy dev->init = vlan_dev_init; 760ef3eb3e5SPatrick McHardy dev->open = vlan_dev_open; 761ef3eb3e5SPatrick McHardy dev->stop = vlan_dev_stop; 762ef3eb3e5SPatrick McHardy dev->set_mac_address = vlan_dev_set_mac_address; 763ef3eb3e5SPatrick McHardy dev->set_multicast_list = vlan_dev_set_multicast_list; 764ef3eb3e5SPatrick McHardy dev->change_rx_flags = vlan_dev_change_rx_flags; 765ef3eb3e5SPatrick McHardy dev->do_ioctl = vlan_dev_ioctl; 766ef3eb3e5SPatrick McHardy dev->destructor = free_netdev; 767ef3eb3e5SPatrick McHardy 768ef3eb3e5SPatrick McHardy memset(dev->broadcast, 0, ETH_ALEN); 769ef3eb3e5SPatrick McHardy } 770