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> 3175b8846aSPatrick McHardy #include <linux/ethtool.h> 321da177e4SLinus Torvalds #include <net/datalink.h> 331da177e4SLinus Torvalds #include <net/p8022.h> 341da177e4SLinus Torvalds #include <net/arp.h> 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include "vlan.h" 371da177e4SLinus Torvalds #include "vlanproc.h" 381da177e4SLinus Torvalds #include <linux/if_vlan.h> 391da177e4SLinus Torvalds #include <net/ip.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds /* 421da177e4SLinus Torvalds * Rebuild the Ethernet MAC header. This is called after an ARP 431da177e4SLinus Torvalds * (or in future other address resolution) has completed on this 441da177e4SLinus Torvalds * sk_buff. We now let ARP fill in the other fields. 451da177e4SLinus Torvalds * 461da177e4SLinus Torvalds * This routine CANNOT use cached dst->neigh! 471da177e4SLinus Torvalds * Really, it is used only when dst->neigh is wrong. 481da177e4SLinus Torvalds * 491da177e4SLinus Torvalds * TODO: This needs a checkup, I'm ignorant here. --BLG 501da177e4SLinus Torvalds */ 51ef3eb3e5SPatrick McHardy static int vlan_dev_rebuild_header(struct sk_buff *skb) 521da177e4SLinus Torvalds { 531da177e4SLinus Torvalds struct net_device *dev = skb->dev; 541da177e4SLinus Torvalds struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds switch (veth->h_vlan_encapsulated_proto) { 571da177e4SLinus Torvalds #ifdef CONFIG_INET 581da177e4SLinus Torvalds case __constant_htons(ETH_P_IP): 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds /* TODO: Confirm this will work with VLAN headers... */ 611da177e4SLinus Torvalds return arp_find(veth->h_dest, skb); 621da177e4SLinus Torvalds #endif 631da177e4SLinus Torvalds default: 6440f98e1aSPatrick McHardy pr_debug("%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; 693ff50b79SStephen Hemminger } 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 { 769dfebcc6SPatrick McHardy if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { 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 9391b4f954SPavel Emelyanov static inline void vlan_set_encap_proto(struct sk_buff *skb, 9491b4f954SPavel Emelyanov struct vlan_hdr *vhdr) 9591b4f954SPavel Emelyanov { 9691b4f954SPavel Emelyanov __be16 proto; 9791b4f954SPavel Emelyanov unsigned char *rawp; 9891b4f954SPavel Emelyanov 9991b4f954SPavel Emelyanov /* 10091b4f954SPavel Emelyanov * Was a VLAN packet, grab the encapsulated protocol, which the layer 10191b4f954SPavel Emelyanov * three protocols care about. 10291b4f954SPavel Emelyanov */ 10391b4f954SPavel Emelyanov 10491b4f954SPavel Emelyanov proto = vhdr->h_vlan_encapsulated_proto; 10591b4f954SPavel Emelyanov if (ntohs(proto) >= 1536) { 10691b4f954SPavel Emelyanov skb->protocol = proto; 10791b4f954SPavel Emelyanov return; 10891b4f954SPavel Emelyanov } 10991b4f954SPavel Emelyanov 11091b4f954SPavel Emelyanov rawp = skb->data; 11191b4f954SPavel Emelyanov if (*(unsigned short *)rawp == 0xFFFF) 11291b4f954SPavel Emelyanov /* 11391b4f954SPavel Emelyanov * This is a magic hack to spot IPX packets. Older Novell 11491b4f954SPavel Emelyanov * breaks the protocol design and runs IPX over 802.3 without 11591b4f954SPavel Emelyanov * an 802.2 LLC layer. We look for FFFF which isn't a used 11691b4f954SPavel Emelyanov * 802.2 SSAP/DSAP. This won't work for fault tolerant netware 11791b4f954SPavel Emelyanov * but does for the rest. 11891b4f954SPavel Emelyanov */ 11991b4f954SPavel Emelyanov skb->protocol = htons(ETH_P_802_3); 12091b4f954SPavel Emelyanov else 12191b4f954SPavel Emelyanov /* 12291b4f954SPavel Emelyanov * Real 802.2 LLC 12391b4f954SPavel Emelyanov */ 12491b4f954SPavel Emelyanov skb->protocol = htons(ETH_P_802_2); 12591b4f954SPavel Emelyanov } 12691b4f954SPavel Emelyanov 1271da177e4SLinus Torvalds /* 1281da177e4SLinus Torvalds * Determine the packet's protocol ID. The rule here is that we 1291da177e4SLinus Torvalds * assume 802.3 if the type field is short enough to be a length. 1301da177e4SLinus Torvalds * This is normal practice and works for any 'now in use' protocol. 1311da177e4SLinus Torvalds * 1321da177e4SLinus Torvalds * Also, at this point we assume that we ARE dealing exclusively with 1331da177e4SLinus Torvalds * VLAN packets, or packets that should be made into VLAN packets based 1341da177e4SLinus Torvalds * on a default VLAN ID. 1351da177e4SLinus Torvalds * 1361da177e4SLinus Torvalds * NOTE: Should be similar to ethernet/eth.c. 1371da177e4SLinus Torvalds * 1381da177e4SLinus Torvalds * SANITY NOTE: This method is called when a packet is moving up the stack 1391da177e4SLinus Torvalds * towards userland. To get here, it would have already passed 1401da177e4SLinus Torvalds * through the ethernet/eth.c eth_type_trans() method. 1411da177e4SLinus Torvalds * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be 1421da177e4SLinus Torvalds * stored UNALIGNED in the memory. RISC systems don't like 1431da177e4SLinus Torvalds * such cases very much... 1442029cc2cSPatrick McHardy * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be 1452029cc2cSPatrick McHardy * aligned, so there doesn't need to be any of the unaligned 1462029cc2cSPatrick McHardy * stuff. It has been commented out now... --Ben 1471da177e4SLinus Torvalds * 1481da177e4SLinus Torvalds */ 1491da177e4SLinus Torvalds int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, 150f2ccd8faSDavid S. Miller struct packet_type *ptype, struct net_device *orig_dev) 1511da177e4SLinus Torvalds { 152e7c243c9SEvgeniy Polyakov struct vlan_hdr *vhdr; 1531da177e4SLinus Torvalds struct net_device_stats *stats; 1549bb8582eSPatrick McHardy u16 vlan_id; 1559bb8582eSPatrick McHardy u16 vlan_tci; 1561da177e4SLinus Torvalds 1572029cc2cSPatrick McHardy skb = skb_share_check(skb, GFP_ATOMIC); 1582029cc2cSPatrick McHardy if (skb == NULL) 15931ffdbcbSPatrick McHardy goto err_free; 160e7c243c9SEvgeniy Polyakov 16131ffdbcbSPatrick McHardy if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) 16231ffdbcbSPatrick McHardy goto err_free; 163e7c243c9SEvgeniy Polyakov 16431ffdbcbSPatrick McHardy vhdr = (struct vlan_hdr *)skb->data; 1659bb8582eSPatrick McHardy vlan_tci = ntohs(vhdr->h_vlan_TCI); 1669bb8582eSPatrick McHardy vlan_id = vlan_tci & VLAN_VID_MASK; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds rcu_read_lock(); 1699bb8582eSPatrick McHardy skb->dev = __find_vlan_dev(dev, vlan_id); 1701da177e4SLinus Torvalds if (!skb->dev) { 1712029cc2cSPatrick McHardy pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", 1729bb8582eSPatrick McHardy __func__, vlan_id, dev->name); 17331ffdbcbSPatrick McHardy goto err_unlock; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds skb->dev->last_rx = jiffies; 1771da177e4SLinus Torvalds 1787bd38d77SPatrick McHardy stats = &skb->dev->stats; 1791da177e4SLinus Torvalds stats->rx_packets++; 1801da177e4SLinus Torvalds stats->rx_bytes += skb->len; 1811da177e4SLinus Torvalds 182cbb042f9SHerbert Xu skb_pull_rcsum(skb, VLAN_HLEN); 183a388442cSStephen Hemminger 1849bb8582eSPatrick McHardy skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); 1851da177e4SLinus Torvalds 18640f98e1aSPatrick McHardy pr_debug("%s: priority: %u for TCI: %hu\n", 1879bb8582eSPatrick McHardy __func__, skb->priority, vlan_tci); 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds switch (skb->pkt_type) { 1901da177e4SLinus Torvalds case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 1912029cc2cSPatrick McHardy /* stats->broadcast ++; // no such counter :-( */ 1921da177e4SLinus Torvalds break; 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds case PACKET_MULTICAST: 1951da177e4SLinus Torvalds stats->multicast++; 1961da177e4SLinus Torvalds break; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds case PACKET_OTHERHOST: 1991da177e4SLinus Torvalds /* Our lower layer thinks this is not local, let's make sure. 2002029cc2cSPatrick McHardy * This allows the VLAN to have a different MAC than the 2012029cc2cSPatrick McHardy * underlying device, and still route correctly. 2021da177e4SLinus Torvalds */ 2032029cc2cSPatrick McHardy if (!compare_ether_addr(eth_hdr(skb)->h_dest, 2042029cc2cSPatrick McHardy skb->dev->dev_addr)) 2051da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 2061da177e4SLinus Torvalds break; 2071da177e4SLinus Torvalds default: 2081da177e4SLinus Torvalds break; 2093ff50b79SStephen Hemminger } 2101da177e4SLinus Torvalds 21191b4f954SPavel Emelyanov vlan_set_encap_proto(skb, vhdr); 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds skb = vlan_check_reorder_header(skb); 21431ffdbcbSPatrick McHardy if (!skb) { 2151da177e4SLinus Torvalds stats->rx_errors++; 21631ffdbcbSPatrick McHardy goto err_unlock; 2171da177e4SLinus Torvalds } 21831ffdbcbSPatrick McHardy 21931ffdbcbSPatrick McHardy netif_rx(skb); 2201da177e4SLinus Torvalds rcu_read_unlock(); 22131ffdbcbSPatrick McHardy return NET_RX_SUCCESS; 22231ffdbcbSPatrick McHardy 22331ffdbcbSPatrick McHardy err_unlock: 22431ffdbcbSPatrick McHardy rcu_read_unlock(); 22531ffdbcbSPatrick McHardy err_free: 22631ffdbcbSPatrick McHardy kfree_skb(skb); 22731ffdbcbSPatrick McHardy return NET_RX_DROP; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2309bb8582eSPatrick McHardy static inline u16 2312029cc2cSPatrick McHardy vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 2321da177e4SLinus Torvalds { 2332029cc2cSPatrick McHardy struct vlan_priority_tci_mapping *mp; 2341da177e4SLinus Torvalds 2352029cc2cSPatrick McHardy mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; 2361da177e4SLinus Torvalds while (mp) { 2371da177e4SLinus Torvalds if (mp->priority == skb->priority) { 2382029cc2cSPatrick McHardy return mp->vlan_qos; /* This should already be shifted 2392029cc2cSPatrick McHardy * to mask correctly with the 2402029cc2cSPatrick McHardy * VLAN's TCI */ 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds mp = mp->next; 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds return 0; 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds /* 2481da177e4SLinus Torvalds * Create the VLAN header for an arbitrary protocol layer 2491da177e4SLinus Torvalds * 2501da177e4SLinus Torvalds * saddr=NULL means use device source address 2511da177e4SLinus Torvalds * daddr=NULL means leave destination address (eg unresolved arp) 2521da177e4SLinus Torvalds * 2531da177e4SLinus Torvalds * This is called when the SKB is moving down the stack towards the 2541da177e4SLinus Torvalds * physical devices. 2551da177e4SLinus Torvalds */ 256ef3eb3e5SPatrick McHardy static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 2573b04dddeSStephen Hemminger unsigned short type, 258ef3eb3e5SPatrick McHardy const void *daddr, const void *saddr, 259ef3eb3e5SPatrick McHardy unsigned int len) 2601da177e4SLinus Torvalds { 2611da177e4SLinus Torvalds struct vlan_hdr *vhdr; 2629bb8582eSPatrick McHardy u16 vlan_tci = 0; 2631da177e4SLinus Torvalds int rc = 0; 2641da177e4SLinus Torvalds int build_vlan_header = 0; 2652029cc2cSPatrick McHardy struct net_device *vdev = dev; 2661da177e4SLinus Torvalds 26740f98e1aSPatrick McHardy pr_debug("%s: skb: %p type: %hx len: %u vlan_id: %hx, daddr: %p\n", 2680dc47877SHarvey Harrison __func__, skb, type, len, vlan_dev_info(dev)->vlan_id, 2692029cc2cSPatrick McHardy daddr); 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds /* build vlan header only if re_order_header flag is NOT set. This 2721da177e4SLinus Torvalds * fixes some programs that get confused when they see a VLAN device 2731da177e4SLinus Torvalds * sending a frame that is VLAN encoded (the consensus is that the VLAN 2741da177e4SLinus Torvalds * device should look completely like an Ethernet device when the 2751da177e4SLinus Torvalds * REORDER_HEADER flag is set) The drawback to this is some extra 2761da177e4SLinus Torvalds * header shuffling in the hard_start_xmit. Users can turn off this 2771da177e4SLinus Torvalds * REORDER behaviour with the vconfig tool. 2781da177e4SLinus Torvalds */ 2799dfebcc6SPatrick McHardy if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) 280a4bf3af4SPatrick McHardy build_vlan_header = 1; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds if (build_vlan_header) { 2831da177e4SLinus Torvalds vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds /* build the four bytes that make this a VLAN header. */ 2861da177e4SLinus Torvalds 2872029cc2cSPatrick McHardy /* Now, construct the second two bytes. This field looks 2882029cc2cSPatrick McHardy * something like: 2891da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 2901da177e4SLinus Torvalds * CFI 1 bit 2911da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 2921da177e4SLinus Torvalds * 2931da177e4SLinus Torvalds */ 2949bb8582eSPatrick McHardy vlan_tci = vlan_dev_info(dev)->vlan_id; 2959bb8582eSPatrick McHardy vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 2961da177e4SLinus Torvalds 2979bb8582eSPatrick McHardy vhdr->h_vlan_TCI = htons(vlan_tci); 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds /* 3002029cc2cSPatrick McHardy * Set the protocol type. For a packet of type ETH_P_802_3 we 3012029cc2cSPatrick McHardy * put the length in here instead. It is up to the 802.2 3022029cc2cSPatrick McHardy * layer to carry protocol information. 3031da177e4SLinus Torvalds */ 3041da177e4SLinus Torvalds 3052029cc2cSPatrick McHardy if (type != ETH_P_802_3) 3061da177e4SLinus Torvalds vhdr->h_vlan_encapsulated_proto = htons(type); 3072029cc2cSPatrick McHardy else 3081da177e4SLinus Torvalds vhdr->h_vlan_encapsulated_proto = htons(len); 309279e172aSJerome Borsboom 310279e172aSJerome Borsboom skb->protocol = htons(ETH_P_8021Q); 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds /* Before delegating work to the lower layer, enter our MAC-address */ 3141da177e4SLinus Torvalds if (saddr == NULL) 3151da177e4SLinus Torvalds saddr = dev->dev_addr; 3161da177e4SLinus Torvalds 3179dfebcc6SPatrick McHardy dev = vlan_dev_info(dev)->real_dev; 3181da177e4SLinus Torvalds 3192029cc2cSPatrick McHardy /* MPLS can send us skbuffs w/out enough space. This check will grow 3202029cc2cSPatrick McHardy * the skb if it doesn't have enough headroom. Not a beautiful solution, 3212029cc2cSPatrick McHardy * so I'll tick a counter so that users can know it's happening... 3222029cc2cSPatrick McHardy * If they care... 3231da177e4SLinus Torvalds */ 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds /* NOTE: This may still break if the underlying device is not the final 3261da177e4SLinus Torvalds * device (and thus there are more headers to add...) It should work for 3271da177e4SLinus Torvalds * good-ole-ethernet though. 3281da177e4SLinus Torvalds */ 3291da177e4SLinus Torvalds if (skb_headroom(skb) < dev->hard_header_len) { 3301da177e4SLinus Torvalds struct sk_buff *sk_tmp = skb; 3311da177e4SLinus Torvalds skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); 3321da177e4SLinus Torvalds kfree_skb(sk_tmp); 3331da177e4SLinus Torvalds if (skb == NULL) { 3347bd38d77SPatrick McHardy struct net_device_stats *stats = &vdev->stats; 3351da177e4SLinus Torvalds stats->tx_dropped++; 3361da177e4SLinus Torvalds return -ENOMEM; 3371da177e4SLinus Torvalds } 3389dfebcc6SPatrick McHardy vlan_dev_info(vdev)->cnt_inc_headroom_on_tx++; 3390dc47877SHarvey Harrison pr_debug("%s: %s: had to grow skb\n", __func__, vdev->name); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds if (build_vlan_header) { 3431da177e4SLinus Torvalds /* Now make the underlying real hard header */ 3440c4e8581SStephen Hemminger rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, 3450c4e8581SStephen Hemminger len + VLAN_HLEN); 3460c4e8581SStephen Hemminger if (rc > 0) 3471da177e4SLinus Torvalds rc += VLAN_HLEN; 3480c4e8581SStephen Hemminger else if (rc < 0) 3491da177e4SLinus Torvalds rc -= VLAN_HLEN; 3500c4e8581SStephen Hemminger } else 3512029cc2cSPatrick McHardy /* If here, then we'll just make a normal looking ethernet 3522029cc2cSPatrick McHardy * frame, but, the hard_start_xmit method will insert the tag 3532029cc2cSPatrick McHardy * (it has to be able to do this for bridged and other skbs 3542029cc2cSPatrick McHardy * that don't come down the protocol stack in an orderly manner. 3551da177e4SLinus Torvalds */ 3560c4e8581SStephen Hemminger rc = dev_hard_header(skb, dev, type, daddr, saddr, len); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds return rc; 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 361ef3eb3e5SPatrick McHardy static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 3621da177e4SLinus Torvalds { 3637bd38d77SPatrick McHardy struct net_device_stats *stats = &dev->stats; 3641da177e4SLinus Torvalds struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 36555b01e86SDavid S. Miller 3661da177e4SLinus Torvalds /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 3671da177e4SLinus Torvalds * 3681da177e4SLinus Torvalds * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 3691da177e4SLinus Torvalds * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 3701da177e4SLinus Torvalds */ 3711da177e4SLinus Torvalds 3726ab3b487SJoonwoo Park if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 3739dfebcc6SPatrick McHardy vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { 3741da177e4SLinus Torvalds int orig_headroom = skb_headroom(skb); 3759bb8582eSPatrick McHardy u16 vlan_tci; 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds /* This is not a VLAN frame...but we can fix that! */ 3789dfebcc6SPatrick McHardy vlan_dev_info(dev)->cnt_encap_on_xmit++; 3791da177e4SLinus Torvalds 38040f98e1aSPatrick McHardy pr_debug("%s: proto to encap: 0x%hx\n", 381577f99c1SDavid S. Miller __func__, ntohs(veth->h_vlan_proto)); 3821da177e4SLinus Torvalds /* Construct the second two bytes. This field looks something 3831da177e4SLinus Torvalds * like: 3841da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 3851da177e4SLinus Torvalds * CFI 1 bit 3861da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 3871da177e4SLinus Torvalds */ 3889bb8582eSPatrick McHardy vlan_tci = vlan_dev_info(dev)->vlan_id; 3899bb8582eSPatrick McHardy vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 3901da177e4SLinus Torvalds 3919bb8582eSPatrick McHardy skb = __vlan_put_tag(skb, vlan_tci); 3921da177e4SLinus Torvalds if (!skb) { 3931da177e4SLinus Torvalds stats->tx_dropped++; 3941da177e4SLinus Torvalds return 0; 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds 3972029cc2cSPatrick McHardy if (orig_headroom < VLAN_HLEN) 3989dfebcc6SPatrick McHardy vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 40140f98e1aSPatrick McHardy pr_debug("%s: about to send skb: %p to dev: %s\n", 4020dc47877SHarvey Harrison __func__, skb, skb->dev->name); 40355b01e86SDavid S. Miller pr_debug(" " MAC_FMT " " MAC_FMT " %4hx %4hx %4hx\n", 40455b01e86SDavid S. Miller veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], 40555b01e86SDavid S. Miller veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], 40655b01e86SDavid S. Miller veth->h_source[0], veth->h_source[1], veth->h_source[2], 40755b01e86SDavid S. Miller veth->h_source[3], veth->h_source[4], veth->h_source[5], 40840f98e1aSPatrick McHardy veth->h_vlan_proto, veth->h_vlan_TCI, 40940f98e1aSPatrick McHardy veth->h_vlan_encapsulated_proto); 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds stats->tx_packets++; /* for statics only */ 4121da177e4SLinus Torvalds stats->tx_bytes += skb->len; 4131da177e4SLinus Torvalds 4149dfebcc6SPatrick McHardy skb->dev = vlan_dev_info(dev)->real_dev; 4151da177e4SLinus Torvalds dev_queue_xmit(skb); 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds return 0; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 420ef3eb3e5SPatrick McHardy static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, 421ef3eb3e5SPatrick McHardy struct net_device *dev) 4221da177e4SLinus Torvalds { 4237bd38d77SPatrick McHardy struct net_device_stats *stats = &dev->stats; 4249bb8582eSPatrick McHardy u16 vlan_tci; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds /* Construct the second two bytes. This field looks something 4271da177e4SLinus Torvalds * like: 4281da177e4SLinus Torvalds * usr_priority: 3 bits (high bits) 4291da177e4SLinus Torvalds * CFI 1 bit 4301da177e4SLinus Torvalds * VLAN ID 12 bits (low bits) 4311da177e4SLinus Torvalds */ 4329bb8582eSPatrick McHardy vlan_tci = vlan_dev_info(dev)->vlan_id; 4339bb8582eSPatrick McHardy vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 4349bb8582eSPatrick McHardy skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds stats->tx_packets++; 4371da177e4SLinus Torvalds stats->tx_bytes += skb->len; 4381da177e4SLinus Torvalds 4399dfebcc6SPatrick McHardy skb->dev = vlan_dev_info(dev)->real_dev; 4401da177e4SLinus Torvalds dev_queue_xmit(skb); 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds return 0; 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds 445ef3eb3e5SPatrick McHardy static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 4461da177e4SLinus Torvalds { 4471da177e4SLinus Torvalds /* TODO: gotta make sure the underlying layer can handle it, 4481da177e4SLinus Torvalds * maybe an IFF_VLAN_CAPABLE flag for devices? 4491da177e4SLinus Torvalds */ 4509dfebcc6SPatrick McHardy if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) 4511da177e4SLinus Torvalds return -ERANGE; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds dev->mtu = new_mtu; 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds return 0; 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds 458c17d8874SPatrick McHardy void vlan_dev_set_ingress_priority(const struct net_device *dev, 4599bb8582eSPatrick McHardy u32 skb_prio, u16 vlan_prio) 4601da177e4SLinus Torvalds { 4619dfebcc6SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 462b020cb48SPatrick McHardy 463b020cb48SPatrick McHardy if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 464b020cb48SPatrick McHardy vlan->nr_ingress_mappings--; 465b020cb48SPatrick McHardy else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 466b020cb48SPatrick McHardy vlan->nr_ingress_mappings++; 467b020cb48SPatrick McHardy 468b020cb48SPatrick McHardy vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 4691da177e4SLinus Torvalds } 4701da177e4SLinus Torvalds 471c17d8874SPatrick McHardy int vlan_dev_set_egress_priority(const struct net_device *dev, 4729bb8582eSPatrick McHardy u32 skb_prio, u16 vlan_prio) 4731da177e4SLinus Torvalds { 4749dfebcc6SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 4751da177e4SLinus Torvalds struct vlan_priority_tci_mapping *mp = NULL; 4761da177e4SLinus Torvalds struct vlan_priority_tci_mapping *np; 477b020cb48SPatrick McHardy u32 vlan_qos = (vlan_prio << 13) & 0xE000; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds /* See if a priority mapping exists.. */ 480b020cb48SPatrick McHardy mp = vlan->egress_priority_map[skb_prio & 0xF]; 4811da177e4SLinus Torvalds while (mp) { 4821da177e4SLinus Torvalds if (mp->priority == skb_prio) { 483b020cb48SPatrick McHardy if (mp->vlan_qos && !vlan_qos) 484b020cb48SPatrick McHardy vlan->nr_egress_mappings--; 485b020cb48SPatrick McHardy else if (!mp->vlan_qos && vlan_qos) 486b020cb48SPatrick McHardy vlan->nr_egress_mappings++; 487b020cb48SPatrick McHardy mp->vlan_qos = vlan_qos; 4881da177e4SLinus Torvalds return 0; 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds mp = mp->next; 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /* Create a new mapping then. */ 494b020cb48SPatrick McHardy mp = vlan->egress_priority_map[skb_prio & 0xF]; 4951da177e4SLinus Torvalds np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 496c17d8874SPatrick McHardy if (!np) 497c17d8874SPatrick McHardy return -ENOBUFS; 498c17d8874SPatrick McHardy 4991da177e4SLinus Torvalds np->next = mp; 5001da177e4SLinus Torvalds np->priority = skb_prio; 501b020cb48SPatrick McHardy np->vlan_qos = vlan_qos; 502b020cb48SPatrick McHardy vlan->egress_priority_map[skb_prio & 0xF] = np; 503b020cb48SPatrick McHardy if (vlan_qos) 504b020cb48SPatrick McHardy vlan->nr_egress_mappings++; 5051da177e4SLinus Torvalds return 0; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 508a4bf3af4SPatrick McHardy /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 509b3ce0325SPatrick McHardy int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 5101da177e4SLinus Torvalds { 511b3ce0325SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 512b3ce0325SPatrick McHardy u32 old_flags = vlan->flags; 513b3ce0325SPatrick McHardy 51470c03b49SPatrick McHardy if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) 5151da177e4SLinus Torvalds return -EINVAL; 516b3ce0325SPatrick McHardy 517b3ce0325SPatrick McHardy vlan->flags = (old_flags & ~mask) | (flags & mask); 51870c03b49SPatrick McHardy 51970c03b49SPatrick McHardy if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 52070c03b49SPatrick McHardy if (vlan->flags & VLAN_FLAG_GVRP) 52170c03b49SPatrick McHardy vlan_gvrp_request_join(dev); 52270c03b49SPatrick McHardy else 52370c03b49SPatrick McHardy vlan_gvrp_request_leave(dev); 52470c03b49SPatrick McHardy } 525b3ce0325SPatrick McHardy return 0; 5261da177e4SLinus Torvalds } 5271da177e4SLinus Torvalds 528c17d8874SPatrick McHardy void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 5291da177e4SLinus Torvalds { 5309dfebcc6SPatrick McHardy strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 533ef3eb3e5SPatrick McHardy static int vlan_dev_open(struct net_device *dev) 5341da177e4SLinus Torvalds { 5359dfebcc6SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 5368c979c26SPatrick McHardy struct net_device *real_dev = vlan->real_dev; 5378c979c26SPatrick McHardy int err; 5388c979c26SPatrick McHardy 5398c979c26SPatrick McHardy if (!(real_dev->flags & IFF_UP)) 5401da177e4SLinus Torvalds return -ENETDOWN; 5411da177e4SLinus Torvalds 5428c979c26SPatrick McHardy if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 5438c979c26SPatrick McHardy err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); 5448c979c26SPatrick McHardy if (err < 0) 5458c979c26SPatrick McHardy return err; 5468c979c26SPatrick McHardy } 5478c979c26SPatrick McHardy memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 5488c979c26SPatrick McHardy 5496c78dcbdSPatrick McHardy if (dev->flags & IFF_ALLMULTI) 5506c78dcbdSPatrick McHardy dev_set_allmulti(real_dev, 1); 5516c78dcbdSPatrick McHardy if (dev->flags & IFF_PROMISC) 5526c78dcbdSPatrick McHardy dev_set_promiscuity(real_dev, 1); 5536c78dcbdSPatrick McHardy 55470c03b49SPatrick McHardy if (vlan->flags & VLAN_FLAG_GVRP) 55570c03b49SPatrick McHardy vlan_gvrp_request_join(dev); 55670c03b49SPatrick McHardy 5571da177e4SLinus Torvalds return 0; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 560ef3eb3e5SPatrick McHardy static int vlan_dev_stop(struct net_device *dev) 5611da177e4SLinus Torvalds { 56270c03b49SPatrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 56370c03b49SPatrick McHardy struct net_device *real_dev = vlan->real_dev; 56470c03b49SPatrick McHardy 56570c03b49SPatrick McHardy if (vlan->flags & VLAN_FLAG_GVRP) 56670c03b49SPatrick McHardy vlan_gvrp_request_leave(dev); 5678c979c26SPatrick McHardy 56856addd6eSPatrick McHardy dev_mc_unsync(real_dev, dev); 569e83a2ea8SChris Leech dev_unicast_unsync(real_dev, dev); 5706c78dcbdSPatrick McHardy if (dev->flags & IFF_ALLMULTI) 5716c78dcbdSPatrick McHardy dev_set_allmulti(real_dev, -1); 5726c78dcbdSPatrick McHardy if (dev->flags & IFF_PROMISC) 5736c78dcbdSPatrick McHardy dev_set_promiscuity(real_dev, -1); 5746c78dcbdSPatrick McHardy 5758c979c26SPatrick McHardy if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 5768c979c26SPatrick McHardy dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); 5778c979c26SPatrick McHardy 5781da177e4SLinus Torvalds return 0; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds 581ef3eb3e5SPatrick McHardy static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 58239aaac11SPatrick McHardy { 5839dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 58439aaac11SPatrick McHardy struct sockaddr *addr = p; 58539aaac11SPatrick McHardy int err; 58639aaac11SPatrick McHardy 58739aaac11SPatrick McHardy if (!is_valid_ether_addr(addr->sa_data)) 58839aaac11SPatrick McHardy return -EADDRNOTAVAIL; 58939aaac11SPatrick McHardy 59039aaac11SPatrick McHardy if (!(dev->flags & IFF_UP)) 59139aaac11SPatrick McHardy goto out; 59239aaac11SPatrick McHardy 59339aaac11SPatrick McHardy if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { 59439aaac11SPatrick McHardy err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); 59539aaac11SPatrick McHardy if (err < 0) 59639aaac11SPatrick McHardy return err; 59739aaac11SPatrick McHardy } 59839aaac11SPatrick McHardy 59939aaac11SPatrick McHardy if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 60039aaac11SPatrick McHardy dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); 60139aaac11SPatrick McHardy 60239aaac11SPatrick McHardy out: 60339aaac11SPatrick McHardy memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 60439aaac11SPatrick McHardy return 0; 60539aaac11SPatrick McHardy } 60639aaac11SPatrick McHardy 607ef3eb3e5SPatrick McHardy static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 6081da177e4SLinus Torvalds { 6099dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 6101da177e4SLinus Torvalds struct ifreq ifrr; 6111da177e4SLinus Torvalds int err = -EOPNOTSUPP; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 6141da177e4SLinus Torvalds ifrr.ifr_ifru = ifr->ifr_ifru; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds switch (cmd) { 6171da177e4SLinus Torvalds case SIOCGMIIPHY: 6181da177e4SLinus Torvalds case SIOCGMIIREG: 6191da177e4SLinus Torvalds case SIOCSMIIREG: 6201da177e4SLinus Torvalds if (real_dev->do_ioctl && netif_device_present(real_dev)) 6211da177e4SLinus Torvalds err = real_dev->do_ioctl(real_dev, &ifrr, cmd); 6221da177e4SLinus Torvalds break; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds if (!err) 6261da177e4SLinus Torvalds ifr->ifr_ifru = ifrr.ifr_ifru; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds return err; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 631ef3eb3e5SPatrick McHardy static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 6326c78dcbdSPatrick McHardy { 6339dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 6346c78dcbdSPatrick McHardy 6356c78dcbdSPatrick McHardy if (change & IFF_ALLMULTI) 6366c78dcbdSPatrick McHardy dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 6376c78dcbdSPatrick McHardy if (change & IFF_PROMISC) 6386c78dcbdSPatrick McHardy dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 6396c78dcbdSPatrick McHardy } 6406c78dcbdSPatrick McHardy 641e83a2ea8SChris Leech static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 6421da177e4SLinus Torvalds { 6439dfebcc6SPatrick McHardy dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 644e83a2ea8SChris Leech dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 6451da177e4SLinus Torvalds } 646ef3eb3e5SPatrick McHardy 647ef3eb3e5SPatrick McHardy /* 648ef3eb3e5SPatrick McHardy * vlan network devices have devices nesting below it, and are a special 649ef3eb3e5SPatrick McHardy * "super class" of normal network devices; split their locks off into a 650ef3eb3e5SPatrick McHardy * separate class since they always nest. 651ef3eb3e5SPatrick McHardy */ 652ef3eb3e5SPatrick McHardy static struct lock_class_key vlan_netdev_xmit_lock_key; 653ef3eb3e5SPatrick McHardy 654ef3eb3e5SPatrick McHardy static const struct header_ops vlan_header_ops = { 655ef3eb3e5SPatrick McHardy .create = vlan_dev_hard_header, 656ef3eb3e5SPatrick McHardy .rebuild = vlan_dev_rebuild_header, 657ef3eb3e5SPatrick McHardy .parse = eth_header_parse, 658ef3eb3e5SPatrick McHardy }; 659ef3eb3e5SPatrick McHardy 660ef3eb3e5SPatrick McHardy static int vlan_dev_init(struct net_device *dev) 661ef3eb3e5SPatrick McHardy { 6629dfebcc6SPatrick McHardy struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 663ef3eb3e5SPatrick McHardy int subclass = 0; 664ef3eb3e5SPatrick McHardy 665ef3eb3e5SPatrick McHardy /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 6660ed21b32SPatrick McHardy dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); 667ef3eb3e5SPatrick McHardy dev->iflink = real_dev->ifindex; 668ef3eb3e5SPatrick McHardy dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 669ef3eb3e5SPatrick McHardy (1<<__LINK_STATE_DORMANT))) | 670ef3eb3e5SPatrick McHardy (1<<__LINK_STATE_PRESENT); 671ef3eb3e5SPatrick McHardy 672289c79a4SPatrick McHardy dev->features |= real_dev->features & real_dev->vlan_features; 6735fb13570SPatrick McHardy 674ef3eb3e5SPatrick McHardy /* ipv6 shared card related stuff */ 675ef3eb3e5SPatrick McHardy dev->dev_id = real_dev->dev_id; 676ef3eb3e5SPatrick McHardy 677ef3eb3e5SPatrick McHardy if (is_zero_ether_addr(dev->dev_addr)) 678ef3eb3e5SPatrick McHardy memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 679ef3eb3e5SPatrick McHardy if (is_zero_ether_addr(dev->broadcast)) 680ef3eb3e5SPatrick McHardy memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 681ef3eb3e5SPatrick McHardy 682ef3eb3e5SPatrick McHardy if (real_dev->features & NETIF_F_HW_VLAN_TX) { 683ef3eb3e5SPatrick McHardy dev->header_ops = real_dev->header_ops; 684ef3eb3e5SPatrick McHardy dev->hard_header_len = real_dev->hard_header_len; 685ef3eb3e5SPatrick McHardy dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 686ef3eb3e5SPatrick McHardy } else { 687ef3eb3e5SPatrick McHardy dev->header_ops = &vlan_header_ops; 688ef3eb3e5SPatrick McHardy dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 689ef3eb3e5SPatrick McHardy dev->hard_start_xmit = vlan_dev_hard_start_xmit; 690ef3eb3e5SPatrick McHardy } 691ef3eb3e5SPatrick McHardy 69226a25239SJoonwoo Park if (is_vlan_dev(real_dev)) 693ef3eb3e5SPatrick McHardy subclass = 1; 694ef3eb3e5SPatrick McHardy 695ef3eb3e5SPatrick McHardy lockdep_set_class_and_subclass(&dev->_xmit_lock, 696ef3eb3e5SPatrick McHardy &vlan_netdev_xmit_lock_key, subclass); 697ef3eb3e5SPatrick McHardy return 0; 698ef3eb3e5SPatrick McHardy } 699ef3eb3e5SPatrick McHardy 70023556323SPavel Emelyanov static void vlan_dev_uninit(struct net_device *dev) 70123556323SPavel Emelyanov { 70223556323SPavel Emelyanov struct vlan_priority_tci_mapping *pm; 70323556323SPavel Emelyanov struct vlan_dev_info *vlan = vlan_dev_info(dev); 70423556323SPavel Emelyanov int i; 70523556323SPavel Emelyanov 70623556323SPavel Emelyanov for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 70723556323SPavel Emelyanov while ((pm = vlan->egress_priority_map[i]) != NULL) { 70823556323SPavel Emelyanov vlan->egress_priority_map[i] = pm->next; 70923556323SPavel Emelyanov kfree(pm); 71023556323SPavel Emelyanov } 71123556323SPavel Emelyanov } 71223556323SPavel Emelyanov } 71323556323SPavel Emelyanov 71475b8846aSPatrick McHardy static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) 71575b8846aSPatrick McHardy { 71675b8846aSPatrick McHardy const struct vlan_dev_info *vlan = vlan_dev_info(dev); 71775b8846aSPatrick McHardy struct net_device *real_dev = vlan->real_dev; 71875b8846aSPatrick McHardy 71975b8846aSPatrick McHardy if (real_dev->ethtool_ops == NULL || 72075b8846aSPatrick McHardy real_dev->ethtool_ops->get_rx_csum == NULL) 72175b8846aSPatrick McHardy return 0; 72275b8846aSPatrick McHardy return real_dev->ethtool_ops->get_rx_csum(real_dev); 72375b8846aSPatrick McHardy } 72475b8846aSPatrick McHardy 72575b8846aSPatrick McHardy static const struct ethtool_ops vlan_ethtool_ops = { 72675b8846aSPatrick McHardy .get_link = ethtool_op_get_link, 72775b8846aSPatrick McHardy .get_rx_csum = vlan_ethtool_get_rx_csum, 72875b8846aSPatrick McHardy }; 72975b8846aSPatrick McHardy 730ef3eb3e5SPatrick McHardy void vlan_setup(struct net_device *dev) 731ef3eb3e5SPatrick McHardy { 732ef3eb3e5SPatrick McHardy ether_setup(dev); 733ef3eb3e5SPatrick McHardy 734ef3eb3e5SPatrick McHardy dev->priv_flags |= IFF_802_1Q_VLAN; 735ef3eb3e5SPatrick McHardy dev->tx_queue_len = 0; 736ef3eb3e5SPatrick McHardy 737ef3eb3e5SPatrick McHardy dev->change_mtu = vlan_dev_change_mtu; 738ef3eb3e5SPatrick McHardy dev->init = vlan_dev_init; 73923556323SPavel Emelyanov dev->uninit = vlan_dev_uninit; 740ef3eb3e5SPatrick McHardy dev->open = vlan_dev_open; 741ef3eb3e5SPatrick McHardy dev->stop = vlan_dev_stop; 742ef3eb3e5SPatrick McHardy dev->set_mac_address = vlan_dev_set_mac_address; 743e83a2ea8SChris Leech dev->set_rx_mode = vlan_dev_set_rx_mode; 744e83a2ea8SChris Leech dev->set_multicast_list = vlan_dev_set_rx_mode; 745ef3eb3e5SPatrick McHardy dev->change_rx_flags = vlan_dev_change_rx_flags; 746ef3eb3e5SPatrick McHardy dev->do_ioctl = vlan_dev_ioctl; 747ef3eb3e5SPatrick McHardy dev->destructor = free_netdev; 74875b8846aSPatrick McHardy dev->ethtool_ops = &vlan_ethtool_ops; 749ef3eb3e5SPatrick McHardy 750ef3eb3e5SPatrick McHardy memset(dev->broadcast, 0, ETH_ALEN); 751ef3eb3e5SPatrick McHardy } 752