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> 61da177e4SLinus Torvalds * Please send support related email to: vlan@scry.wanfear.com 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 */ 501da177e4SLinus Torvalds 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: 631da177e4SLinus Torvalds printk(VLAN_DBG 641da177e4SLinus Torvalds "%s: unable to resolve type %X addresses.\n", 65d136fe72SAlexey Dobriyan dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 681da177e4SLinus Torvalds break; 691da177e4SLinus Torvalds }; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds return 0; 721da177e4SLinus Torvalds } 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) 751da177e4SLinus Torvalds { 761da177e4SLinus Torvalds if (VLAN_DEV_INFO(skb->dev)->flags & 1) { 771da177e4SLinus Torvalds if (skb_shared(skb) || skb_cloned(skb)) { 781da177e4SLinus Torvalds struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC); 791da177e4SLinus Torvalds kfree_skb(skb); 801da177e4SLinus Torvalds skb = nskb; 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds if (skb) { 831da177e4SLinus Torvalds /* Lifted from Gleb's VLAN code... */ 841da177e4SLinus Torvalds memmove(skb->data - ETH_HLEN, 851da177e4SLinus Torvalds skb->data - VLAN_ETH_HLEN, 12); 86b0e380b1SArnaldo Carvalho de Melo skb->mac_header += VLAN_HLEN; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds return skb; 911da177e4SLinus Torvalds } 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds /* 941da177e4SLinus Torvalds * Determine the packet's protocol ID. The rule here is that we 951da177e4SLinus Torvalds * assume 802.3 if the type field is short enough to be a length. 961da177e4SLinus Torvalds * This is normal practice and works for any 'now in use' protocol. 971da177e4SLinus Torvalds * 981da177e4SLinus Torvalds * Also, at this point we assume that we ARE dealing exclusively with 991da177e4SLinus Torvalds * VLAN packets, or packets that should be made into VLAN packets based 1001da177e4SLinus Torvalds * on a default VLAN ID. 1011da177e4SLinus Torvalds * 1021da177e4SLinus Torvalds * NOTE: Should be similar to ethernet/eth.c. 1031da177e4SLinus Torvalds * 1041da177e4SLinus Torvalds * SANITY NOTE: This method is called when a packet is moving up the stack 1051da177e4SLinus Torvalds * towards userland. To get here, it would have already passed 1061da177e4SLinus Torvalds * through the ethernet/eth.c eth_type_trans() method. 1071da177e4SLinus Torvalds * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be 1081da177e4SLinus Torvalds * stored UNALIGNED in the memory. RISC systems don't like 1091da177e4SLinus Torvalds * such cases very much... 1101da177e4SLinus Torvalds * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be aligned, 1111da177e4SLinus Torvalds * so there doesn't need to be any of the unaligned stuff. It has 1121da177e4SLinus Torvalds * been commented out now... --Ben 1131da177e4SLinus Torvalds * 1141da177e4SLinus Torvalds */ 1151da177e4SLinus Torvalds int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, 116f2ccd8faSDavid S. Miller struct packet_type* ptype, struct net_device *orig_dev) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds unsigned char *rawp = NULL; 1191da177e4SLinus Torvalds struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data); 1201da177e4SLinus Torvalds unsigned short vid; 1211da177e4SLinus Torvalds struct net_device_stats *stats; 1221da177e4SLinus Torvalds unsigned short vlan_TCI; 1233c3f8f25SAlexey Dobriyan __be16 proto; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds /* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */ 1261da177e4SLinus Torvalds vlan_TCI = ntohs(vhdr->h_vlan_TCI); 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds vid = (vlan_TCI & VLAN_VID_MASK); 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds #ifdef VLAN_DEBUG 1311da177e4SLinus Torvalds printk(VLAN_DBG "%s: skb: %p vlan_id: %hx\n", 1321da177e4SLinus Torvalds __FUNCTION__, skb, vid); 1331da177e4SLinus Torvalds #endif 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds /* Ok, we will find the correct VLAN device, strip the header, 1361da177e4SLinus Torvalds * and then go on as usual. 1371da177e4SLinus Torvalds */ 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds /* We have 12 bits of vlan ID. 1401da177e4SLinus Torvalds * 1411da177e4SLinus Torvalds * We must not drop allow preempt until we hold a 1421da177e4SLinus Torvalds * reference to the device (netif_rx does that) or we 1431da177e4SLinus Torvalds * fail. 1441da177e4SLinus Torvalds */ 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds rcu_read_lock(); 1471da177e4SLinus Torvalds skb->dev = __find_vlan_dev(dev, vid); 1481da177e4SLinus Torvalds if (!skb->dev) { 1491da177e4SLinus Torvalds rcu_read_unlock(); 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds #ifdef VLAN_DEBUG 1521da177e4SLinus Torvalds printk(VLAN_DBG "%s: ERROR: No net_device for VID: %i on dev: %s [%i]\n", 1531da177e4SLinus Torvalds __FUNCTION__, (unsigned int)(vid), dev->name, dev->ifindex); 1541da177e4SLinus Torvalds #endif 1551da177e4SLinus Torvalds kfree_skb(skb); 1561da177e4SLinus Torvalds return -1; 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds skb->dev->last_rx = jiffies; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* Bump the rx counters for the VLAN device. */ 1621da177e4SLinus Torvalds stats = vlan_dev_get_stats(skb->dev); 1631da177e4SLinus Torvalds stats->rx_packets++; 1641da177e4SLinus Torvalds stats->rx_bytes += skb->len; 1651da177e4SLinus Torvalds 166cbb042f9SHerbert Xu /* Take off the VLAN header (4 bytes currently) */ 167cbb042f9SHerbert Xu skb_pull_rcsum(skb, VLAN_HLEN); 168a388442cSStephen Hemminger 1691da177e4SLinus Torvalds /* Ok, lets check to make sure the device (dev) we 1701da177e4SLinus Torvalds * came in on is what this VLAN is attached to. 1711da177e4SLinus Torvalds */ 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds if (dev != VLAN_DEV_INFO(skb->dev)->real_dev) { 1741da177e4SLinus Torvalds rcu_read_unlock(); 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds #ifdef VLAN_DEBUG 1771da177e4SLinus Torvalds printk(VLAN_DBG "%s: dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n", 1781da177e4SLinus Torvalds __FUNCTION__, skb, dev->name, 1791da177e4SLinus Torvalds VLAN_DEV_INFO(skb->dev)->real_dev->name, 1801da177e4SLinus Torvalds skb->dev->name); 1811da177e4SLinus Torvalds #endif 1821da177e4SLinus Torvalds kfree_skb(skb); 1831da177e4SLinus Torvalds stats->rx_errors++; 1841da177e4SLinus Torvalds return -1; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds /* 1881da177e4SLinus Torvalds * Deal with ingress priority mapping. 1891da177e4SLinus Torvalds */ 1901da177e4SLinus Torvalds skb->priority = vlan_get_ingress_priority(skb->dev, ntohs(vhdr->h_vlan_TCI)); 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds #ifdef VLAN_DEBUG 1931da177e4SLinus Torvalds printk(VLAN_DBG "%s: priority: %lu for TCI: %hu (hbo)\n", 1941da177e4SLinus Torvalds __FUNCTION__, (unsigned long)(skb->priority), 1951da177e4SLinus Torvalds ntohs(vhdr->h_vlan_TCI)); 1961da177e4SLinus Torvalds #endif 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds /* The ethernet driver already did the pkt_type calculations 1991da177e4SLinus Torvalds * for us... 2001da177e4SLinus Torvalds */ 2011da177e4SLinus Torvalds switch (skb->pkt_type) { 2021da177e4SLinus Torvalds case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 2031da177e4SLinus Torvalds // stats->broadcast ++; // no such counter :-( 2041da177e4SLinus Torvalds break; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds case PACKET_MULTICAST: 2071da177e4SLinus Torvalds stats->multicast++; 2081da177e4SLinus Torvalds break; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds case PACKET_OTHERHOST: 2111da177e4SLinus Torvalds /* Our lower layer thinks this is not local, let's make sure. 2121da177e4SLinus Torvalds * This allows the VLAN to have a different MAC than the underlying 2131da177e4SLinus Torvalds * device, and still route correctly. 2141da177e4SLinus Torvalds */ 215d3f4a687SKris Katterjohn if (!compare_ether_addr(eth_hdr(skb)->h_dest, skb->dev->dev_addr)) { 2161da177e4SLinus Torvalds /* It is for our (changed) MAC-address! */ 2171da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds break; 2201da177e4SLinus Torvalds default: 2211da177e4SLinus Torvalds break; 2221da177e4SLinus Torvalds }; 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds /* Was a VLAN packet, grab the encapsulated protocol, which the layer 2251da177e4SLinus Torvalds * three protocols care about. 2261da177e4SLinus Torvalds */ 2271da177e4SLinus Torvalds /* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */ 2281da177e4SLinus Torvalds proto = vhdr->h_vlan_encapsulated_proto; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds skb->protocol = proto; 2311da177e4SLinus Torvalds if (ntohs(proto) >= 1536) { 2321da177e4SLinus Torvalds /* place it back on the queue to be handled by 2331da177e4SLinus Torvalds * true layer 3 protocols. 2341da177e4SLinus Torvalds */ 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds /* See if we are configured to re-write the VLAN header 2371da177e4SLinus Torvalds * to make it look like ethernet... 2381da177e4SLinus Torvalds */ 2391da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds /* Can be null if skb-clone fails when re-ordering */ 2421da177e4SLinus Torvalds if (skb) { 2431da177e4SLinus Torvalds netif_rx(skb); 2441da177e4SLinus Torvalds } else { 2451da177e4SLinus Torvalds /* TODO: Add a more specific counter here. */ 2461da177e4SLinus Torvalds stats->rx_errors++; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds rcu_read_unlock(); 2491da177e4SLinus Torvalds return 0; 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds rawp = skb->data; 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds /* 2551da177e4SLinus Torvalds * This is a magic hack to spot IPX packets. Older Novell breaks 2561da177e4SLinus Torvalds * the protocol design and runs IPX over 802.3 without an 802.2 LLC 2571da177e4SLinus Torvalds * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 2581da177e4SLinus Torvalds * won't work for fault tolerant netware but does for the rest. 2591da177e4SLinus Torvalds */ 2601da177e4SLinus Torvalds if (*(unsigned short *)rawp == 0xFFFF) { 261b93b7eebSYOSHIFUJI Hideaki skb->protocol = htons(ETH_P_802_3); 2621da177e4SLinus Torvalds /* place it back on the queue to be handled by true layer 3 protocols. 2631da177e4SLinus Torvalds */ 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds /* See if we are configured to re-write the VLAN header 2661da177e4SLinus Torvalds * to make it look like ethernet... 2671da177e4SLinus Torvalds */ 2681da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds /* Can be null if skb-clone fails when re-ordering */ 2711da177e4SLinus Torvalds if (skb) { 2721da177e4SLinus Torvalds netif_rx(skb); 2731da177e4SLinus Torvalds } else { 2741da177e4SLinus Torvalds /* TODO: Add a more specific counter here. */ 2751da177e4SLinus Torvalds stats->rx_errors++; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds rcu_read_unlock(); 2781da177e4SLinus Torvalds return 0; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds /* 2821da177e4SLinus Torvalds * Real 802.2 LLC 2831da177e4SLinus Torvalds */ 284b93b7eebSYOSHIFUJI Hideaki skb->protocol = htons(ETH_P_802_2); 2851da177e4SLinus Torvalds /* place it back on the queue to be handled by upper layer protocols. 2861da177e4SLinus Torvalds */ 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds /* See if we are configured to re-write the VLAN header 2891da177e4SLinus Torvalds * to make it look like ethernet... 2901da177e4SLinus Torvalds */ 2911da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds /* Can be null if skb-clone fails when re-ordering */ 2941da177e4SLinus Torvalds if (skb) { 2951da177e4SLinus Torvalds netif_rx(skb); 2961da177e4SLinus Torvalds } else { 2971da177e4SLinus Torvalds /* TODO: Add a more specific counter here. */ 2981da177e4SLinus Torvalds stats->rx_errors++; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds rcu_read_unlock(); 3011da177e4SLinus Torvalds return 0; 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev, 3051da177e4SLinus Torvalds struct sk_buff* skb) 3061da177e4SLinus Torvalds { 3071da177e4SLinus Torvalds struct vlan_priority_tci_mapping *mp = 3081da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->egress_priority_map[(skb->priority & 0xF)]; 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds while (mp) { 3111da177e4SLinus Torvalds if (mp->priority == skb->priority) { 3121da177e4SLinus Torvalds return mp->vlan_qos; /* This should already be shifted to mask 3131da177e4SLinus Torvalds * correctly with the VLAN's TCI 3141da177e4SLinus Torvalds */ 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds mp = mp->next; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds return 0; 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds /* 3221da177e4SLinus Torvalds * Create the VLAN header for an arbitrary protocol layer 3231da177e4SLinus Torvalds * 3241da177e4SLinus Torvalds * saddr=NULL means use device source address 3251da177e4SLinus Torvalds * daddr=NULL means leave destination address (eg unresolved arp) 3261da177e4SLinus Torvalds * 3271da177e4SLinus Torvalds * This is called when the SKB is moving down the stack towards the 3281da177e4SLinus Torvalds * physical devices. 3291da177e4SLinus Torvalds */ 3301da177e4SLinus Torvalds int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 3311da177e4SLinus Torvalds unsigned short type, void *daddr, void *saddr, 3321da177e4SLinus Torvalds unsigned len) 3331da177e4SLinus Torvalds { 3341da177e4SLinus Torvalds struct vlan_hdr *vhdr; 3351da177e4SLinus Torvalds unsigned short veth_TCI = 0; 3361da177e4SLinus Torvalds int rc = 0; 3371da177e4SLinus Torvalds int build_vlan_header = 0; 3381da177e4SLinus Torvalds struct net_device *vdev = dev; /* save this for the bottom of the method */ 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds #ifdef VLAN_DEBUG 3411da177e4SLinus Torvalds printk(VLAN_DBG "%s: skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n", 3421da177e4SLinus Torvalds __FUNCTION__, skb, type, len, VLAN_DEV_INFO(dev)->vlan_id, daddr); 3431da177e4SLinus Torvalds #endif 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds /* build vlan header only if re_order_header flag is NOT set. This 3461da177e4SLinus Torvalds * fixes some programs that get confused when they see a VLAN device 3471da177e4SLinus Torvalds * sending a frame that is VLAN encoded (the consensus is that the VLAN 3481da177e4SLinus Torvalds * device should look completely like an Ethernet device when the 3491da177e4SLinus Torvalds * REORDER_HEADER flag is set) The drawback to this is some extra 3501da177e4SLinus Torvalds * header shuffling in the hard_start_xmit. Users can turn off this 3511da177e4SLinus Torvalds * REORDER behaviour with the vconfig tool. 3521da177e4SLinus Torvalds */ 3531da177e4SLinus Torvalds build_vlan_header = ((VLAN_DEV_INFO(dev)->flags & 1) == 0); 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds if (build_vlan_header) { 3561da177e4SLinus Torvalds vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds /* build the four bytes that make this a VLAN header. */ 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds /* Now, construct the second two bytes. This field looks something 3611da177e4SLinus Torvalds * like: 3621da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 3631da177e4SLinus Torvalds * CFI 1 bit 3641da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 3651da177e4SLinus Torvalds * 3661da177e4SLinus Torvalds */ 3671da177e4SLinus Torvalds veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 3681da177e4SLinus Torvalds veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds vhdr->h_vlan_TCI = htons(veth_TCI); 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds /* 3731da177e4SLinus Torvalds * Set the protocol type. 3741da177e4SLinus Torvalds * For a packet of type ETH_P_802_3 we put the length in here instead. 3751da177e4SLinus Torvalds * It is up to the 802.2 layer to carry protocol information. 3761da177e4SLinus Torvalds */ 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds if (type != ETH_P_802_3) { 3791da177e4SLinus Torvalds vhdr->h_vlan_encapsulated_proto = htons(type); 3801da177e4SLinus Torvalds } else { 3811da177e4SLinus Torvalds vhdr->h_vlan_encapsulated_proto = htons(len); 3821da177e4SLinus Torvalds } 383279e172aSJerome Borsboom 384279e172aSJerome Borsboom skb->protocol = htons(ETH_P_8021Q); 385be8bd863SDavid S. Miller skb_reset_network_header(skb); 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds /* Before delegating work to the lower layer, enter our MAC-address */ 3891da177e4SLinus Torvalds if (saddr == NULL) 3901da177e4SLinus Torvalds saddr = dev->dev_addr; 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds dev = VLAN_DEV_INFO(dev)->real_dev; 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds /* MPLS can send us skbuffs w/out enough space. This check will grow the 3951da177e4SLinus Torvalds * skb if it doesn't have enough headroom. Not a beautiful solution, so 3961da177e4SLinus Torvalds * I'll tick a counter so that users can know it's happening... If they 3971da177e4SLinus Torvalds * care... 3981da177e4SLinus Torvalds */ 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds /* NOTE: This may still break if the underlying device is not the final 4011da177e4SLinus Torvalds * device (and thus there are more headers to add...) It should work for 4021da177e4SLinus Torvalds * good-ole-ethernet though. 4031da177e4SLinus Torvalds */ 4041da177e4SLinus Torvalds if (skb_headroom(skb) < dev->hard_header_len) { 4051da177e4SLinus Torvalds struct sk_buff *sk_tmp = skb; 4061da177e4SLinus Torvalds skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); 4071da177e4SLinus Torvalds kfree_skb(sk_tmp); 4081da177e4SLinus Torvalds if (skb == NULL) { 4091da177e4SLinus Torvalds struct net_device_stats *stats = vlan_dev_get_stats(vdev); 4101da177e4SLinus Torvalds stats->tx_dropped++; 4111da177e4SLinus Torvalds return -ENOMEM; 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds VLAN_DEV_INFO(vdev)->cnt_inc_headroom_on_tx++; 4141da177e4SLinus Torvalds #ifdef VLAN_DEBUG 4151da177e4SLinus Torvalds printk(VLAN_DBG "%s: %s: had to grow skb.\n", __FUNCTION__, vdev->name); 4161da177e4SLinus Torvalds #endif 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds if (build_vlan_header) { 4201da177e4SLinus Torvalds /* Now make the underlying real hard header */ 4211da177e4SLinus Torvalds rc = dev->hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, len + VLAN_HLEN); 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds if (rc > 0) { 4241da177e4SLinus Torvalds rc += VLAN_HLEN; 4251da177e4SLinus Torvalds } else if (rc < 0) { 4261da177e4SLinus Torvalds rc -= VLAN_HLEN; 4271da177e4SLinus Torvalds } 4281da177e4SLinus Torvalds } else { 4291da177e4SLinus Torvalds /* If here, then we'll just make a normal looking ethernet frame, 4301da177e4SLinus Torvalds * but, the hard_start_xmit method will insert the tag (it has to 4311da177e4SLinus Torvalds * be able to do this for bridged and other skbs that don't come 4321da177e4SLinus Torvalds * down the protocol stack in an orderly manner. 4331da177e4SLinus Torvalds */ 4341da177e4SLinus Torvalds rc = dev->hard_header(skb, dev, type, daddr, saddr, len); 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds return rc; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 4411da177e4SLinus Torvalds { 4421da177e4SLinus Torvalds struct net_device_stats *stats = vlan_dev_get_stats(dev); 4431da177e4SLinus Torvalds struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 4461da177e4SLinus Torvalds * 4471da177e4SLinus Torvalds * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 4481da177e4SLinus Torvalds * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 4491da177e4SLinus Torvalds */ 4501da177e4SLinus Torvalds 451b93b7eebSYOSHIFUJI Hideaki if (veth->h_vlan_proto != htons(ETH_P_8021Q)) { 4521da177e4SLinus Torvalds int orig_headroom = skb_headroom(skb); 4531da177e4SLinus Torvalds unsigned short veth_TCI; 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds /* This is not a VLAN frame...but we can fix that! */ 4561da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->cnt_encap_on_xmit++; 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds #ifdef VLAN_DEBUG 4591da177e4SLinus Torvalds printk(VLAN_DBG "%s: proto to encap: 0x%hx (hbo)\n", 4601da177e4SLinus Torvalds __FUNCTION__, htons(veth->h_vlan_proto)); 4611da177e4SLinus Torvalds #endif 4621da177e4SLinus Torvalds /* Construct the second two bytes. This field looks something 4631da177e4SLinus Torvalds * like: 4641da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 4651da177e4SLinus Torvalds * CFI 1 bit 4661da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 4671da177e4SLinus Torvalds */ 4681da177e4SLinus Torvalds veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 4691da177e4SLinus Torvalds veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds skb = __vlan_put_tag(skb, veth_TCI); 4721da177e4SLinus Torvalds if (!skb) { 4731da177e4SLinus Torvalds stats->tx_dropped++; 4741da177e4SLinus Torvalds return 0; 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds if (orig_headroom < VLAN_HLEN) { 4781da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->cnt_inc_headroom_on_tx++; 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds #ifdef VLAN_DEBUG 4831da177e4SLinus Torvalds printk(VLAN_DBG "%s: about to send skb: %p to dev: %s\n", 4841da177e4SLinus Torvalds __FUNCTION__, skb, skb->dev->name); 4851da177e4SLinus Torvalds printk(VLAN_DBG " %2hx.%2hx.%2hx.%2xh.%2hx.%2hx %2hx.%2hx.%2hx.%2hx.%2hx.%2hx %4hx %4hx %4hx\n", 4861da177e4SLinus Torvalds veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], 4871da177e4SLinus Torvalds veth->h_source[0], veth->h_source[1], veth->h_source[2], veth->h_source[3], veth->h_source[4], veth->h_source[5], 4881da177e4SLinus Torvalds veth->h_vlan_proto, veth->h_vlan_TCI, veth->h_vlan_encapsulated_proto); 4891da177e4SLinus Torvalds #endif 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds stats->tx_packets++; /* for statics only */ 4921da177e4SLinus Torvalds stats->tx_bytes += skb->len; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds skb->dev = VLAN_DEV_INFO(dev)->real_dev; 4951da177e4SLinus Torvalds dev_queue_xmit(skb); 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds return 0; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 5011da177e4SLinus Torvalds { 5021da177e4SLinus Torvalds struct net_device_stats *stats = vlan_dev_get_stats(dev); 5031da177e4SLinus Torvalds unsigned short veth_TCI; 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds /* Construct the second two bytes. This field looks something 5061da177e4SLinus Torvalds * like: 5071da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 5081da177e4SLinus Torvalds * CFI 1 bit 5091da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 5101da177e4SLinus Torvalds */ 5111da177e4SLinus Torvalds veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 5121da177e4SLinus Torvalds veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 5131da177e4SLinus Torvalds skb = __vlan_hwaccel_put_tag(skb, veth_TCI); 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds stats->tx_packets++; 5161da177e4SLinus Torvalds stats->tx_bytes += skb->len; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds skb->dev = VLAN_DEV_INFO(dev)->real_dev; 5191da177e4SLinus Torvalds dev_queue_xmit(skb); 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds return 0; 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 5251da177e4SLinus Torvalds { 5261da177e4SLinus Torvalds /* TODO: gotta make sure the underlying layer can handle it, 5271da177e4SLinus Torvalds * maybe an IFF_VLAN_CAPABLE flag for devices? 5281da177e4SLinus Torvalds */ 5291da177e4SLinus Torvalds if (VLAN_DEV_INFO(dev)->real_dev->mtu < new_mtu) 5301da177e4SLinus Torvalds return -ERANGE; 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds dev->mtu = new_mtu; 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds return 0; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds int vlan_dev_set_ingress_priority(char *dev_name, __u32 skb_prio, short vlan_prio) 5381da177e4SLinus Torvalds { 5391da177e4SLinus Torvalds struct net_device *dev = dev_get_by_name(dev_name); 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds if (dev) { 5421da177e4SLinus Torvalds if (dev->priv_flags & IFF_802_1Q_VLAN) { 5431da177e4SLinus Torvalds /* see if a priority mapping exists.. */ 5441da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 5451da177e4SLinus Torvalds dev_put(dev); 5461da177e4SLinus Torvalds return 0; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds dev_put(dev); 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds return -EINVAL; 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds int vlan_dev_set_egress_priority(char *dev_name, __u32 skb_prio, short vlan_prio) 5551da177e4SLinus Torvalds { 5561da177e4SLinus Torvalds struct net_device *dev = dev_get_by_name(dev_name); 5571da177e4SLinus Torvalds struct vlan_priority_tci_mapping *mp = NULL; 5581da177e4SLinus Torvalds struct vlan_priority_tci_mapping *np; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds if (dev) { 5611da177e4SLinus Torvalds if (dev->priv_flags & IFF_802_1Q_VLAN) { 5621da177e4SLinus Torvalds /* See if a priority mapping exists.. */ 5631da177e4SLinus Torvalds mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF]; 5641da177e4SLinus Torvalds while (mp) { 5651da177e4SLinus Torvalds if (mp->priority == skb_prio) { 5661da177e4SLinus Torvalds mp->vlan_qos = ((vlan_prio << 13) & 0xE000); 5671da177e4SLinus Torvalds dev_put(dev); 5681da177e4SLinus Torvalds return 0; 5691da177e4SLinus Torvalds } 5701da177e4SLinus Torvalds mp = mp->next; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds /* Create a new mapping then. */ 5741da177e4SLinus Torvalds mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF]; 5751da177e4SLinus Torvalds np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 5761da177e4SLinus Torvalds if (np) { 5771da177e4SLinus Torvalds np->next = mp; 5781da177e4SLinus Torvalds np->priority = skb_prio; 5791da177e4SLinus Torvalds np->vlan_qos = ((vlan_prio << 13) & 0xE000); 5801da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np; 5811da177e4SLinus Torvalds dev_put(dev); 5821da177e4SLinus Torvalds return 0; 5831da177e4SLinus Torvalds } else { 5841da177e4SLinus Torvalds dev_put(dev); 5851da177e4SLinus Torvalds return -ENOBUFS; 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds dev_put(dev); 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds return -EINVAL; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /* Flags are defined in the vlan_dev_info class in include/linux/if_vlan.h file. */ 5941da177e4SLinus Torvalds int vlan_dev_set_vlan_flag(char *dev_name, __u32 flag, short flag_val) 5951da177e4SLinus Torvalds { 5961da177e4SLinus Torvalds struct net_device *dev = dev_get_by_name(dev_name); 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds if (dev) { 5991da177e4SLinus Torvalds if (dev->priv_flags & IFF_802_1Q_VLAN) { 6001da177e4SLinus Torvalds /* verify flag is supported */ 6011da177e4SLinus Torvalds if (flag == 1) { 6021da177e4SLinus Torvalds if (flag_val) { 6031da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->flags |= 1; 6041da177e4SLinus Torvalds } else { 6051da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->flags &= ~1; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds dev_put(dev); 6081da177e4SLinus Torvalds return 0; 6091da177e4SLinus Torvalds } else { 6101da177e4SLinus Torvalds printk(KERN_ERR "%s: flag %i is not valid.\n", 6111da177e4SLinus Torvalds __FUNCTION__, (int)(flag)); 6121da177e4SLinus Torvalds dev_put(dev); 6131da177e4SLinus Torvalds return -EINVAL; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds } else { 6161da177e4SLinus Torvalds printk(KERN_ERR 6171da177e4SLinus Torvalds "%s: %s is not a vlan device, priv_flags: %hX.\n", 6181da177e4SLinus Torvalds __FUNCTION__, dev->name, dev->priv_flags); 6191da177e4SLinus Torvalds dev_put(dev); 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds } else { 6221da177e4SLinus Torvalds printk(KERN_ERR "%s: Could not find device: %s\n", 6231da177e4SLinus Torvalds __FUNCTION__, dev_name); 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds return -EINVAL; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds int vlan_dev_get_realdev_name(const char *dev_name, char* result) 6311da177e4SLinus Torvalds { 6321da177e4SLinus Torvalds struct net_device *dev = dev_get_by_name(dev_name); 6331da177e4SLinus Torvalds int rv = 0; 6341da177e4SLinus Torvalds if (dev) { 6351da177e4SLinus Torvalds if (dev->priv_flags & IFF_802_1Q_VLAN) { 6361da177e4SLinus Torvalds strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23); 6371da177e4SLinus Torvalds rv = 0; 6381da177e4SLinus Torvalds } else { 6391da177e4SLinus Torvalds rv = -EINVAL; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds dev_put(dev); 6421da177e4SLinus Torvalds } else { 6431da177e4SLinus Torvalds rv = -ENODEV; 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds return rv; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds int vlan_dev_get_vid(const char *dev_name, unsigned short* result) 6491da177e4SLinus Torvalds { 6501da177e4SLinus Torvalds struct net_device *dev = dev_get_by_name(dev_name); 6511da177e4SLinus Torvalds int rv = 0; 6521da177e4SLinus Torvalds if (dev) { 6531da177e4SLinus Torvalds if (dev->priv_flags & IFF_802_1Q_VLAN) { 6541da177e4SLinus Torvalds *result = VLAN_DEV_INFO(dev)->vlan_id; 6551da177e4SLinus Torvalds rv = 0; 6561da177e4SLinus Torvalds } else { 6571da177e4SLinus Torvalds rv = -EINVAL; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds dev_put(dev); 6601da177e4SLinus Torvalds } else { 6611da177e4SLinus Torvalds rv = -ENODEV; 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds return rv; 6641da177e4SLinus Torvalds } 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p) 6681da177e4SLinus Torvalds { 6691da177e4SLinus Torvalds struct sockaddr *addr = (struct sockaddr *)(addr_struct_p); 6701da177e4SLinus Torvalds int i; 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds if (netif_running(dev)) 6731da177e4SLinus Torvalds return -EBUSY; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds printk("%s: Setting MAC address to ", dev->name); 6781da177e4SLinus Torvalds for (i = 0; i < 6; i++) 6791da177e4SLinus Torvalds printk(" %2.2x", dev->dev_addr[i]); 6801da177e4SLinus Torvalds printk(".\n"); 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds if (memcmp(VLAN_DEV_INFO(dev)->real_dev->dev_addr, 6831da177e4SLinus Torvalds dev->dev_addr, 6841da177e4SLinus Torvalds dev->addr_len) != 0) { 6851da177e4SLinus Torvalds if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_PROMISC)) { 6861da177e4SLinus Torvalds int flgs = VLAN_DEV_INFO(dev)->real_dev->flags; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds /* Increment our in-use promiscuity counter */ 6891da177e4SLinus Torvalds dev_set_promiscuity(VLAN_DEV_INFO(dev)->real_dev, 1); 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds /* Make PROMISC visible to the user. */ 6921da177e4SLinus Torvalds flgs |= IFF_PROMISC; 6931da177e4SLinus Torvalds printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n", 6941da177e4SLinus Torvalds dev->name, VLAN_DEV_INFO(dev)->real_dev->name); 6951da177e4SLinus Torvalds dev_change_flags(VLAN_DEV_INFO(dev)->real_dev, flgs); 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds } else { 6981da177e4SLinus Torvalds printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n", 6991da177e4SLinus Torvalds dev->name, VLAN_DEV_INFO(dev)->real_dev->name); 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds return 0; 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds static inline int vlan_dmi_equals(struct dev_mc_list *dmi1, 7061da177e4SLinus Torvalds struct dev_mc_list *dmi2) 7071da177e4SLinus Torvalds { 7081da177e4SLinus Torvalds return ((dmi1->dmi_addrlen == dmi2->dmi_addrlen) && 7091da177e4SLinus Torvalds (memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0)); 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds /** dmi is a single entry into a dev_mc_list, a single node. mc_list is 7131da177e4SLinus Torvalds * an entire list, and we'll iterate through it. 7141da177e4SLinus Torvalds */ 7151da177e4SLinus Torvalds static int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds struct dev_mc_list *idmi; 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds for (idmi = mc_list; idmi != NULL; ) { 7201da177e4SLinus Torvalds if (vlan_dmi_equals(dmi, idmi)) { 7211da177e4SLinus Torvalds if (dmi->dmi_users > idmi->dmi_users) 7221da177e4SLinus Torvalds return 1; 7231da177e4SLinus Torvalds else 7241da177e4SLinus Torvalds return 0; 7251da177e4SLinus Torvalds } else { 7261da177e4SLinus Torvalds idmi = idmi->next; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds } 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds return 1; 7311da177e4SLinus Torvalds } 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds static inline void vlan_destroy_mc_list(struct dev_mc_list *mc_list) 7341da177e4SLinus Torvalds { 7351da177e4SLinus Torvalds struct dev_mc_list *dmi = mc_list; 7361da177e4SLinus Torvalds struct dev_mc_list *next; 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds while(dmi) { 7391da177e4SLinus Torvalds next = dmi->next; 7401da177e4SLinus Torvalds kfree(dmi); 7411da177e4SLinus Torvalds dmi = next; 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds static void vlan_copy_mc_list(struct dev_mc_list *mc_list, struct vlan_dev_info *vlan_info) 7461da177e4SLinus Torvalds { 7471da177e4SLinus Torvalds struct dev_mc_list *dmi, *new_dmi; 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds vlan_destroy_mc_list(vlan_info->old_mc_list); 7501da177e4SLinus Torvalds vlan_info->old_mc_list = NULL; 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds for (dmi = mc_list; dmi != NULL; dmi = dmi->next) { 7531da177e4SLinus Torvalds new_dmi = kmalloc(sizeof(*new_dmi), GFP_ATOMIC); 7541da177e4SLinus Torvalds if (new_dmi == NULL) { 7551da177e4SLinus Torvalds printk(KERN_ERR "vlan: cannot allocate memory. " 7561da177e4SLinus Torvalds "Multicast may not work properly from now.\n"); 7571da177e4SLinus Torvalds return; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds /* Copy whole structure, then make new 'next' pointer */ 7611da177e4SLinus Torvalds *new_dmi = *dmi; 7621da177e4SLinus Torvalds new_dmi->next = vlan_info->old_mc_list; 7631da177e4SLinus Torvalds vlan_info->old_mc_list = new_dmi; 7641da177e4SLinus Torvalds } 7651da177e4SLinus Torvalds } 7661da177e4SLinus Torvalds 7671da177e4SLinus Torvalds static void vlan_flush_mc_list(struct net_device *dev) 7681da177e4SLinus Torvalds { 7691da177e4SLinus Torvalds struct dev_mc_list *dmi = dev->mc_list; 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds while (dmi) { 7721da177e4SLinus Torvalds printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from vlan interface\n", 7731da177e4SLinus Torvalds dev->name, 7741da177e4SLinus Torvalds dmi->dmi_addr[0], 7751da177e4SLinus Torvalds dmi->dmi_addr[1], 7761da177e4SLinus Torvalds dmi->dmi_addr[2], 7771da177e4SLinus Torvalds dmi->dmi_addr[3], 7781da177e4SLinus Torvalds dmi->dmi_addr[4], 7791da177e4SLinus Torvalds dmi->dmi_addr[5]); 7801da177e4SLinus Torvalds dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); 7811da177e4SLinus Torvalds dmi = dev->mc_list; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds /* dev->mc_list is NULL by the time we get here. */ 7851da177e4SLinus Torvalds vlan_destroy_mc_list(VLAN_DEV_INFO(dev)->old_mc_list); 7861da177e4SLinus Torvalds VLAN_DEV_INFO(dev)->old_mc_list = NULL; 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds int vlan_dev_open(struct net_device *dev) 7901da177e4SLinus Torvalds { 7911da177e4SLinus Torvalds if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_UP)) 7921da177e4SLinus Torvalds return -ENETDOWN; 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds return 0; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds int vlan_dev_stop(struct net_device *dev) 7981da177e4SLinus Torvalds { 7991da177e4SLinus Torvalds vlan_flush_mc_list(dev); 8001da177e4SLinus Torvalds return 0; 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 8041da177e4SLinus Torvalds { 8051da177e4SLinus Torvalds struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 8061da177e4SLinus Torvalds struct ifreq ifrr; 8071da177e4SLinus Torvalds int err = -EOPNOTSUPP; 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 8101da177e4SLinus Torvalds ifrr.ifr_ifru = ifr->ifr_ifru; 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds switch(cmd) { 8131da177e4SLinus Torvalds case SIOCGMIIPHY: 8141da177e4SLinus Torvalds case SIOCGMIIREG: 8151da177e4SLinus Torvalds case SIOCSMIIREG: 8161da177e4SLinus Torvalds if (real_dev->do_ioctl && netif_device_present(real_dev)) 8171da177e4SLinus Torvalds err = real_dev->do_ioctl(real_dev, &ifrr, cmd); 8181da177e4SLinus Torvalds break; 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds case SIOCETHTOOL: 8211da177e4SLinus Torvalds err = dev_ethtool(&ifrr); 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds if (!err) 8251da177e4SLinus Torvalds ifr->ifr_ifru = ifrr.ifr_ifru; 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds return err; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds /** Taken from Gleb + Lennert's VLAN code, and modified... */ 8311da177e4SLinus Torvalds void vlan_dev_set_multicast_list(struct net_device *vlan_dev) 8321da177e4SLinus Torvalds { 8331da177e4SLinus Torvalds struct dev_mc_list *dmi; 8341da177e4SLinus Torvalds struct net_device *real_dev; 8351da177e4SLinus Torvalds int inc; 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds if (vlan_dev && (vlan_dev->priv_flags & IFF_802_1Q_VLAN)) { 8381da177e4SLinus Torvalds /* Then it's a real vlan device, as far as we can tell.. */ 8391da177e4SLinus Torvalds real_dev = VLAN_DEV_INFO(vlan_dev)->real_dev; 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds /* compare the current promiscuity to the last promisc we had.. */ 8421da177e4SLinus Torvalds inc = vlan_dev->promiscuity - VLAN_DEV_INFO(vlan_dev)->old_promiscuity; 8431da177e4SLinus Torvalds if (inc) { 8441da177e4SLinus Torvalds printk(KERN_INFO "%s: dev_set_promiscuity(master, %d)\n", 8451da177e4SLinus Torvalds vlan_dev->name, inc); 8461da177e4SLinus Torvalds dev_set_promiscuity(real_dev, inc); /* found in dev.c */ 8471da177e4SLinus Torvalds VLAN_DEV_INFO(vlan_dev)->old_promiscuity = vlan_dev->promiscuity; 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds inc = vlan_dev->allmulti - VLAN_DEV_INFO(vlan_dev)->old_allmulti; 8511da177e4SLinus Torvalds if (inc) { 8521da177e4SLinus Torvalds printk(KERN_INFO "%s: dev_set_allmulti(master, %d)\n", 8531da177e4SLinus Torvalds vlan_dev->name, inc); 8541da177e4SLinus Torvalds dev_set_allmulti(real_dev, inc); /* dev.c */ 8551da177e4SLinus Torvalds VLAN_DEV_INFO(vlan_dev)->old_allmulti = vlan_dev->allmulti; 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds /* looking for addresses to add to master's list */ 8591da177e4SLinus Torvalds for (dmi = vlan_dev->mc_list; dmi != NULL; dmi = dmi->next) { 8601da177e4SLinus Torvalds if (vlan_should_add_mc(dmi, VLAN_DEV_INFO(vlan_dev)->old_mc_list)) { 8611da177e4SLinus Torvalds dev_mc_add(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); 8621da177e4SLinus Torvalds printk(KERN_DEBUG "%s: add %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address to master interface\n", 8631da177e4SLinus Torvalds vlan_dev->name, 8641da177e4SLinus Torvalds dmi->dmi_addr[0], 8651da177e4SLinus Torvalds dmi->dmi_addr[1], 8661da177e4SLinus Torvalds dmi->dmi_addr[2], 8671da177e4SLinus Torvalds dmi->dmi_addr[3], 8681da177e4SLinus Torvalds dmi->dmi_addr[4], 8691da177e4SLinus Torvalds dmi->dmi_addr[5]); 8701da177e4SLinus Torvalds } 8711da177e4SLinus Torvalds } 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvalds /* looking for addresses to delete from master's list */ 8741da177e4SLinus Torvalds for (dmi = VLAN_DEV_INFO(vlan_dev)->old_mc_list; dmi != NULL; dmi = dmi->next) { 8751da177e4SLinus Torvalds if (vlan_should_add_mc(dmi, vlan_dev->mc_list)) { 8761da177e4SLinus Torvalds /* if we think we should add it to the new list, then we should really 8771da177e4SLinus Torvalds * delete it from the real list on the underlying device. 8781da177e4SLinus Torvalds */ 8791da177e4SLinus Torvalds dev_mc_delete(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); 8801da177e4SLinus Torvalds printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from master interface\n", 8811da177e4SLinus Torvalds vlan_dev->name, 8821da177e4SLinus Torvalds dmi->dmi_addr[0], 8831da177e4SLinus Torvalds dmi->dmi_addr[1], 8841da177e4SLinus Torvalds dmi->dmi_addr[2], 8851da177e4SLinus Torvalds dmi->dmi_addr[3], 8861da177e4SLinus Torvalds dmi->dmi_addr[4], 8871da177e4SLinus Torvalds dmi->dmi_addr[5]); 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds } 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds /* save multicast list */ 8921da177e4SLinus Torvalds vlan_copy_mc_list(vlan_dev->mc_list, VLAN_DEV_INFO(vlan_dev)); 8931da177e4SLinus Torvalds } 8941da177e4SLinus Torvalds } 895