vlan.c revision d9ed0f0e2dba45eec79ffbdd841757f87712349b
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * INET 802.1Q VLAN 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Ethernet-type device handling. 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Authors: Ben Greear <greearb@candelatech.com> 6ad712087f78469a783281d0d15657edfbff69594Patrick McHardy * Please send support related email to: netdev@vger.kernel.org 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 8122952fc2d6b5ca865e8475ec471d8944fa921c7YOSHIFUJI Hideaki * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Fixes: 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Correct all the locking - David S. Miller <davem@redhat.com>; 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2 of the License, or (at your option) any later version. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> /* for copy_from_user */ 224fc268d24ceb9f4150777c1b5b2b8e6214e56b2bRandy Dunlap#include <linux/capability.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netdevice.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/skbuff.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/datalink.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/in.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/p8022.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/arp.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rtnetlink.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/notifier.h> 34e9dc86534051b78e41e5b746cccc291b57a3a311Eric W. Biederman#include <net/net_namespace.h> 35d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov#include <net/netns/generic.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/if_vlan.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "vlan.h" 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "vlanproc.h" 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRV_VERSION "1.8" 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Global VLAN variables */ 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanovint vlan_net_id; 46d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Our listing of VLAN group(s) */ 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char vlan_fullname[] = "802.1Q VLAN Support"; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char vlan_version[] = DRV_VERSION; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Determines interface naming scheme. */ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct packet_type vlan_packet_type = { 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .type = __constant_htons(ETH_P_8021Q), 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .func = vlan_skb_recv, /* VLAN receive method */ 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* End of global variables definitions. */ 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 652029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardystatic inline unsigned int vlan_grp_hashfn(unsigned int idx) 662029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy{ 672029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; 682029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy} 692029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Must be invoked with RCU read lock (no preempt) */ 71a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanovstatic struct vlan_group *__vlan_find_group(struct net_device *real_dev) 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct vlan_group *grp; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hlist_node *n; 75a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov int hash = vlan_grp_hashfn(real_dev->ifindex); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { 78a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov if (grp->real_dev == real_dev) 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return grp; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Find the protocol handler. Assumes VID < VLAN_VID_MASK. 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Must be invoked with RCU read lock (no preempt) 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct net_device *__find_vlan_dev(struct net_device *real_dev, 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short VID) 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 92a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov struct vlan_group *grp = __vlan_find_group(real_dev); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (grp) 955c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni return vlan_group_get_device(grp, VID); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1005c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Alonistatic void vlan_group_free(struct vlan_group *grp) 1015c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni{ 1025c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni int i; 1035c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni 1042029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) 1055c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni kfree(grp->vlan_devices_arrays[i]); 1065c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni kfree(grp); 1075c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni} 1085c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni 109a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanovstatic struct vlan_group *vlan_group_alloc(struct net_device *real_dev) 11042429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy{ 11142429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy struct vlan_group *grp; 11242429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy 11342429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); 11442429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy if (!grp) 11542429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy return NULL; 11642429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy 117a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov grp->real_dev = real_dev; 11842429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy hlist_add_head_rcu(&grp->hlist, 119a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); 12042429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy return grp; 12167727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov} 12242429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy 12367727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanovstatic int vlan_group_prealloc_vid(struct vlan_group *vg, int vid) 12467727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov{ 12567727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov struct net_device **array; 12667727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov unsigned int size; 12767727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov 12867727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov ASSERT_RTNL(); 12967727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov 13067727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov array = vg->vlan_devices_arrays[vid / VLAN_GROUP_ARRAY_PART_LEN]; 13167727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov if (array != NULL) 13267727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov return 0; 13367727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov 13467727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 13567727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov array = kzalloc(size, GFP_KERNEL); 13667727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov if (array == NULL) 13767727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov return -ENOBUFS; 13867727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov 13967727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov vg->vlan_devices_arrays[vid / VLAN_GROUP_ARRAY_PART_LEN] = array; 14067727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov return 0; 14142429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy} 14242429aaee5eb44f4a48fdb056d77d0c06ef5aebcPatrick McHardy 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void vlan_rcu_free(struct rcu_head *rcu) 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1455c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni vlan_group_free(container_of(rcu, struct vlan_group, rcu)); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 148af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardyvoid unregister_vlan_dev(struct net_device *dev) 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1509dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 151af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy struct net_device *real_dev = vlan->real_dev; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct vlan_group *grp; 153af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy unsigned short vlan_id = vlan->vlan_id; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ASSERT_RTNL(); 156acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy 157a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov grp = __vlan_find_group(real_dev); 158af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy BUG_ON(!grp); 159acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy 160acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy vlan_proc_rem_dev(dev); 161acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy 162acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy /* Take it out of our own structures, but be sure to interlock with 163acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy * HW accelerating devices or SW vlan input packet processing. 164acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy */ 165acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 166acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy real_dev->vlan_rx_kill_vid(real_dev, vlan_id); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 168acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy vlan_group_set_device(grp, vlan_id, NULL); 169af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy grp->nr_vlans--; 170acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy 171af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy synchronize_net(); 172acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy 173acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy /* If the group is now empty, kill off the group. */ 174af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy if (grp->nr_vlans == 0) { 175acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy if (real_dev->features & NETIF_F_HW_VLAN_RX) 176acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy real_dev->vlan_rx_register(real_dev, NULL); 177acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy 178acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy hlist_del_rcu(&grp->hlist); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 180acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy /* Free the group, after all cpu's are done. */ 181acc5efbcd2a023c8801f2bba39971cf93812ce7cPatrick McHardy call_rcu(&grp->rcu, vlan_rcu_free); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 184af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy /* Get rid of the vlan's reference to real_dev */ 185af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy dev_put(real_dev); 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 187c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy unregister_netdevice(dev); 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1902029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardystatic void vlan_transfer_operstate(const struct net_device *dev, 1912029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy struct net_device *vlandev) 192ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf{ 193ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf /* Have to respect userspace enforced dormant state 194ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf * of real device, also must allow supplicant running 195ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf * on VLAN device 196ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf */ 197ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf if (dev->operstate == IF_OPER_DORMANT) 198ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf netif_dormant_on(vlandev); 199ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf else 200ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf netif_dormant_off(vlandev); 201ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf 202ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf if (netif_carrier_ok(dev)) { 203ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf if (!netif_carrier_ok(vlandev)) 204ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf netif_carrier_on(vlandev); 205ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf } else { 206ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf if (netif_carrier_ok(vlandev)) 207ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf netif_carrier_off(vlandev); 208ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf } 209ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf} 210ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf 21107b5b17e157b7018d0ca40ca0d1581a23096fb45Patrick McHardyint vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21340f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy char *name = real_dev->name; 21440f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 21640f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy pr_info("8021q: VLANs not supported on %s\n", name); 217c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy return -EOPNOTSUPP; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 221d2d1acdb6a632486be9a731f40c68980c09f0490Stephen Hemminger !real_dev->vlan_rx_register) { 22240f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy pr_info("8021q: device %s has buggy VLAN hw accel\n", name); 223c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy return -EOPNOTSUPP; 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 227d2d1acdb6a632486be9a731f40c68980c09f0490Stephen Hemminger (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { 22840f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); 229c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy return -EOPNOTSUPP; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The real device must be up and operating in order to 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * assosciate a VLAN device with it. 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(real_dev->flags & IFF_UP)) 236c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy return -ENETDOWN; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23840f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy if (__find_vlan_dev(real_dev, vlan_id) != NULL) 239c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy return -EEXIST; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy return 0; 242c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy} 243c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy 24407b5b17e157b7018d0ca40ca0d1581a23096fb45Patrick McHardyint register_vlan_dev(struct net_device *dev) 245e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy{ 2469dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(dev); 247e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy struct net_device *real_dev = vlan->real_dev; 248e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy unsigned short vlan_id = vlan->vlan_id; 249e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy struct vlan_group *grp, *ngrp = NULL; 250e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy int err; 251e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 252a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov grp = __vlan_find_group(real_dev); 253e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (!grp) { 254a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov ngrp = grp = vlan_group_alloc(real_dev); 255e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (!grp) 256e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy return -ENOBUFS; 257e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy } 258e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 25967727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov err = vlan_group_prealloc_vid(grp, vlan_id); 26067727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov if (err < 0) 26167727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov goto out_free_group; 26267727184f28c38d06013c6659560bb046c1d9f9cPavel Emelyanov 263e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy err = register_netdevice(dev); 264e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (err < 0) 265e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy goto out_free_group; 266e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 267e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy /* Account for reference in struct vlan_dev_info */ 268e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy dev_hold(real_dev); 269e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 270e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy vlan_transfer_operstate(real_dev, dev); 271e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 272e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 273e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy /* So, got the sucker initialized, now lets place 274e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy * it into our local structure. 275e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy */ 276e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy vlan_group_set_device(grp, vlan_id, dev); 277af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy grp->nr_vlans++; 278af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy 279e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) 280e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy real_dev->vlan_rx_register(real_dev, ngrp); 281e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 282e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy real_dev->vlan_rx_add_vid(real_dev, vlan_id); 283e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 284e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (vlan_proc_add_dev(dev) < 0) 28540f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy pr_warning("8021q: failed to add proc entry for %s\n", 28640f98e1af4c6082f7f98391540a2a1ade030480aPatrick McHardy dev->name); 287e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy return 0; 288e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 289e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardyout_free_group: 290e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy if (ngrp) 291e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy vlan_group_free(ngrp); 292e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy return err; 293e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy} 294e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy 295c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy/* Attach a VLAN device to a mac address (ie Ethernet Card). 2962ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy * Returns 0 if the device was created or a negative error code otherwise. 297c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy */ 2982ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardystatic int register_vlan_device(struct net_device *real_dev, 2992ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy unsigned short VLAN_ID) 300c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy{ 301c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy struct net_device *new_dev; 302c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy char name[IFNAMSIZ]; 3032ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy int err; 304c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy 305c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy if (VLAN_ID >= VLAN_VID_MASK) 3062ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy return -ERANGE; 307c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy 3082ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy err = vlan_check_real_dev(real_dev, VLAN_ID); 3092ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy if (err < 0) 3102ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy return err; 311c1d3ee9925ca714a5ed3f8fce01a7027137f4e3fPatrick McHardy 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Gotta set up the fields for the device. */ 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (vlan_name_type) { 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case VLAN_NAME_TYPE_RAW_PLUS_VID: 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* name will look like: eth1.0005 */ 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Put our vlan.VID in the name. 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Name will look like: vlan5 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Put our vlan.VID in the name. 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Name will look like: eth0.5 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case VLAN_NAME_TYPE_PLUS_VID: 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Put our vlan.VID in the name. 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Name will look like: vlan0005 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); 3363ff50b7997fe06cd5d276b229967bb52d6b3b6c1Stephen Hemminger } 337122952fc2d6b5ca865e8475ec471d8944fa921c7YOSHIFUJI Hideaki 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vlan_setup); 3405dd8d1e9eb8b51041505966fe96d081ecbe86efeArjan van de Ven 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_dev == NULL) 3422ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy return -ENOBUFS; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* need 4 bytes for extra VLAN header info, 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hope the underlying device can handle it. 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_dev->mtu = real_dev->mtu; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3499dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy vlan_dev_info(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ 3509dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy vlan_dev_info(new_dev)->real_dev = real_dev; 3519dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy vlan_dev_info(new_dev)->dent = NULL; 3529dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35407b5b17e157b7018d0ca40ca0d1581a23096fb45Patrick McHardy new_dev->rtnl_link_ops = &vlan_link_ops; 3552ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy err = register_vlan_dev(new_dev); 3562ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy if (err < 0) 357e89fe42cd03c8fd3686df82d8390a235717a66dePatrick McHardy goto out_free_newdev; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3592ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy return 0; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_free_newdev: 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_netdev(new_dev); 3632ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy return err; 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3668c979c26a0f093c13290320edda799d8335e50aePatrick McHardystatic void vlan_sync_address(struct net_device *dev, 3678c979c26a0f093c13290320edda799d8335e50aePatrick McHardy struct net_device *vlandev) 3688c979c26a0f093c13290320edda799d8335e50aePatrick McHardy{ 3699dfebcc6479c55c001e4bb5fe7cc16b6799c43a7Patrick McHardy struct vlan_dev_info *vlan = vlan_dev_info(vlandev); 3708c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 3718c979c26a0f093c13290320edda799d8335e50aePatrick McHardy /* May be called without an actual change */ 3728c979c26a0f093c13290320edda799d8335e50aePatrick McHardy if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) 3738c979c26a0f093c13290320edda799d8335e50aePatrick McHardy return; 3748c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 3758c979c26a0f093c13290320edda799d8335e50aePatrick McHardy /* vlan address was different from the old address and is equal to 3768c979c26a0f093c13290320edda799d8335e50aePatrick McHardy * the new address */ 3778c979c26a0f093c13290320edda799d8335e50aePatrick McHardy if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && 3788c979c26a0f093c13290320edda799d8335e50aePatrick McHardy !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) 3798c979c26a0f093c13290320edda799d8335e50aePatrick McHardy dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); 3808c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 3818c979c26a0f093c13290320edda799d8335e50aePatrick McHardy /* vlan address was equal to the old address and is different from 3828c979c26a0f093c13290320edda799d8335e50aePatrick McHardy * the new address */ 3838c979c26a0f093c13290320edda799d8335e50aePatrick McHardy if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && 3848c979c26a0f093c13290320edda799d8335e50aePatrick McHardy compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) 3858c979c26a0f093c13290320edda799d8335e50aePatrick McHardy dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); 3868c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 3878c979c26a0f093c13290320edda799d8335e50aePatrick McHardy memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); 3888c979c26a0f093c13290320edda799d8335e50aePatrick McHardy} 3898c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 390802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanovstatic void __vlan_device_event(struct net_device *dev, unsigned long event) 391802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov{ 392802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov switch (event) { 393802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov case NETDEV_CHANGENAME: 394802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov vlan_proc_rem_dev(dev); 395802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov if (vlan_proc_add_dev(dev) < 0) 396802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov pr_warning("8021q: failed to change proc name for %s\n", 397802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov dev->name); 398802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov break; 399802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov } 400802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov} 401802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov 4022029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardystatic int vlan_device_event(struct notifier_block *unused, unsigned long event, 4032029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy void *ptr) 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device *dev = ptr; 406802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov struct vlan_group *grp; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, flgs; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device *vlandev; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 410c346dca10840a874240c78efe3f39acf4312a1f2YOSHIFUJI Hideaki if (dev_net(dev) != &init_net) 411e9dc86534051b78e41e5b746cccc291b57a3a311Eric W. Biederman return NOTIFY_DONE; 412e9dc86534051b78e41e5b746cccc291b57a3a311Eric W. Biederman 413802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov if (is_vlan_dev(dev)) { 414802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov __vlan_device_event(dev, event); 415802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov goto out; 416802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov } 417802fb176d8c635ae42da31b80841c26e8c7338a0Pavel Emelyanov 418a9fde2607895667823e9d1172fc193087125ef68Pavel Emelyanov grp = __vlan_find_group(dev); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!grp) 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* It is OK that we do not hold the group lock right now, 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as we run under the RTNL lock. 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (event) { 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case NETDEV_CHANGE: 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Propagate real device state to vlan devices */ 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 4305c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni vlandev = vlan_group_get_device(grp, i); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!vlandev) 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 434ddd7bf9fe4e59afc0a041378f82b6e1aa88f714bStefan Rompf vlan_transfer_operstate(dev, vlandev); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4388c979c26a0f093c13290320edda799d8335e50aePatrick McHardy case NETDEV_CHANGEADDR: 4398c979c26a0f093c13290320edda799d8335e50aePatrick McHardy /* Adjust unicast filters on underlying device */ 4408c979c26a0f093c13290320edda799d8335e50aePatrick McHardy for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 4418c979c26a0f093c13290320edda799d8335e50aePatrick McHardy vlandev = vlan_group_get_device(grp, i); 4428c979c26a0f093c13290320edda799d8335e50aePatrick McHardy if (!vlandev) 4438c979c26a0f093c13290320edda799d8335e50aePatrick McHardy continue; 4448c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 445d932e04a5e7b146c5f9bf517714b986a432a7594Patrick McHardy flgs = vlandev->flags; 446d932e04a5e7b146c5f9bf517714b986a432a7594Patrick McHardy if (!(flgs & IFF_UP)) 447d932e04a5e7b146c5f9bf517714b986a432a7594Patrick McHardy continue; 448d932e04a5e7b146c5f9bf517714b986a432a7594Patrick McHardy 4498c979c26a0f093c13290320edda799d8335e50aePatrick McHardy vlan_sync_address(dev, vlandev); 4508c979c26a0f093c13290320edda799d8335e50aePatrick McHardy } 4518c979c26a0f093c13290320edda799d8335e50aePatrick McHardy break; 4528c979c26a0f093c13290320edda799d8335e50aePatrick McHardy 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case NETDEV_DOWN: 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Put all VLANs for this dev in the down state too. */ 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 4565c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni vlandev = vlan_group_get_device(grp, i); 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!vlandev) 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flgs = vlandev->flags; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(flgs & IFF_UP)) 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_change_flags(vlandev, flgs & ~IFF_UP); 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case NETDEV_UP: 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Put all VLANs for this dev in the up state too. */ 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 4715c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni vlandev = vlan_group_get_device(grp, i); 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!vlandev) 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 474122952fc2d6b5ca865e8475ec471d8944fa921c7YOSHIFUJI Hideaki 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flgs = vlandev->flags; 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flgs & IFF_UP) 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_change_flags(vlandev, flgs | IFF_UP); 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 482122952fc2d6b5ca865e8475ec471d8944fa921c7YOSHIFUJI Hideaki 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case NETDEV_UNREGISTER: 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Delete all VLANs for this dev. */ 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 4865c15bdec5c38f4ccf73ef2585fc80a6164de9554Dan Aloni vlandev = vlan_group_get_device(grp, i); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!vlandev) 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 490af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy /* unregistration of last vlan destroys group, abort 491af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy * afterwards */ 492af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy if (grp->nr_vlans == 1) 493af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy i = VLAN_GROUP_ARRAY_LEN; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 495af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy unregister_vlan_dev(vlandev); 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4983ff50b7997fe06cd5d276b229967bb52d6b3b6c1Stephen Hemminger } 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NOTIFY_DONE; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 50469ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardystatic struct notifier_block vlan_notifier_block __read_mostly = { 50569ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy .notifier_call = vlan_device_event, 50669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy}; 50769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * VLAN IOCTL handler. 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * o execute requested action or pass command to the device driver 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * arg is really a struct vlan_ioctl_args __user *. 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 513881d966b48b035ab3f3aeaae0f3d3f9b584f45b2Eric W. Biedermanstatic int vlan_ioctl_handler(struct net *net, void __user *arg) 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 515c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy int err; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short vid = 0; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct vlan_ioctl_args args; 518c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy struct net_device *dev = NULL; 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Null terminate this sucker, just in case. */ 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.device1[23] = 0; 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.u.device2[23] = 0; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 527c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy rtnl_lock(); 528c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (args.cmd) { 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SET_VLAN_INGRESS_PRIORITY_CMD: 531c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case SET_VLAN_EGRESS_PRIORITY_CMD: 532c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case SET_VLAN_FLAG_CMD: 533c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case ADD_VLAN_CMD: 534c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case DEL_VLAN_CMD: 535c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case GET_VLAN_REALDEV_NAME_CMD: 536c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case GET_VLAN_VID_CMD: 537c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -ENODEV; 538881d966b48b035ab3f3aeaae0f3d3f9b584f45b2Eric W. Biederman dev = __dev_get_by_name(&init_net, args.device1); 539c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy if (!dev) 540c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy goto out; 541c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy 542c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EINVAL; 543c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy if (args.cmd != ADD_VLAN_CMD && 544c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy !(dev->priv_flags & IFF_802_1Q_VLAN)) 545c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy goto out; 546c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy } 547c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy 548c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy switch (args.cmd) { 549c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy case SET_VLAN_INGRESS_PRIORITY_CMD: 550c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EPERM; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_NET_ADMIN)) 552c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy break; 553c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy vlan_dev_set_ingress_priority(dev, 554c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy args.u.skb_priority, 555c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy args.vlan_qos); 556fffe470a803e7f7b74c016291e542a0162761209Patrick McHardy err = 0; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SET_VLAN_EGRESS_PRIORITY_CMD: 560c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EPERM; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_NET_ADMIN)) 562c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy break; 563c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = vlan_dev_set_egress_priority(dev, 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.u.skb_priority, 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.vlan_qos); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SET_VLAN_FLAG_CMD: 569c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EPERM; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_NET_ADMIN)) 571c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy break; 572c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = vlan_dev_set_vlan_flag(dev, 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.u.flag, 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.vlan_qos); 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SET_VLAN_NAME_TYPE_CMD: 578c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EPERM; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_NET_ADMIN)) 580e35de02615f97b785dc6f73cba421cea06bcbd10Pavel Emelyanov break; 581c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy if ((args.u.name_type >= 0) && 582c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vlan_name_type = args.u.name_type; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = 0; 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EINVAL; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case ADD_VLAN_CMD: 591c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EPERM; 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_NET_ADMIN)) 593c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy break; 5942ae0bf69b716d07126f0a9c17fcc2d76da172cb6Patrick McHardy err = register_vlan_device(dev, args.u.VID); 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DEL_VLAN_CMD: 598c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy err = -EPERM; 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_NET_ADMIN)) 600c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy break; 601af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy unregister_vlan_dev(dev); 602af30151709bcace1ca844d4bb8b7e2e392ff81ebPatrick McHardy err = 0; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case GET_VLAN_REALDEV_NAME_CMD: 6063f5f4346b6d3c8bc33780a941da2473c4be2c989Andrew Morton err = 0; 607c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy vlan_dev_get_realdev_name(dev, args.u.device2); 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user(arg, &args, 6092029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy sizeof(struct vlan_ioctl_args))) 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case GET_VLAN_VID_CMD: 6143f5f4346b6d3c8bc33780a941da2473c4be2c989Andrew Morton err = 0; 615c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy vlan_dev_get_vid(dev, &vid); 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds args.u.VID = vid; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user(arg, &args, 6182029cc2c84fb1169c80c6cf6fc375f11194ed8b5Patrick McHardy sizeof(struct vlan_ioctl_args))) 619122952fc2d6b5ca865e8475ec471d8944fa921c7YOSHIFUJI Hideaki err = -EFAULT; 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 623198a291ce3a9103f4738600e3cf5416b66e009d9Patrick McHardy err = -EOPNOTSUPP; 624c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy break; 6253ff50b7997fe06cd5d276b229967bb52d6b3b6c1Stephen Hemminger } 6267eb1b3d372a53fe9220b9e3b579886db0fe2f897Mika Kukkonenout: 627c17d8874f9959070552fddf1b4e1d73c0c144c0fPatrick McHardy rtnl_unlock(); 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 631d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanovstatic int vlan_init_net(struct net *net) 632d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov{ 633d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov int err; 634d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov struct vlan_net *vn; 635d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 636d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov err = -ENOMEM; 637d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); 638d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov if (vn == NULL) 639d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov goto err_alloc; 640d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 641d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov err = net_assign_generic(net, vlan_net_id, vn); 642d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov if (err < 0) 643d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov goto err_assign; 644d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 645d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov return 0; 646d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 647d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanoverr_assign: 648d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov kfree(vn); 649d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanoverr_alloc: 650d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov return err; 651d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov} 652d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 653d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanovstatic void vlan_exit_net(struct net *net) 654d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov{ 655d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov struct vlan_net *vn; 656d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 657d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov vn = net_generic(net, vlan_net_id); 658d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov kfree(vn); 659d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov} 660d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 661d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanovstatic struct pernet_operations vlan_net_ops = { 662d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov .init = vlan_init_net, 663d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov .exit = vlan_exit_net, 664d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov}; 665d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 66669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardystatic int __init vlan_proto_init(void) 66769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy{ 66869ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy int err; 66969ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 67069ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); 67169ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy pr_info("All bugs added by %s\n", vlan_buggyright); 67269ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 673d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); 674d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov if (err < 0) 675d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov goto err0; 676d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 67769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy err = vlan_proc_init(); 67869ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy if (err < 0) 67969ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy goto err1; 68069ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 68169ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy err = register_netdevice_notifier(&vlan_notifier_block); 68269ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy if (err < 0) 68369ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy goto err2; 68469ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 68569ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy err = vlan_netlink_init(); 68669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy if (err < 0) 68769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy goto err3; 68869ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 68969ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy dev_add_pack(&vlan_packet_type); 69069ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy vlan_ioctl_set(vlan_ioctl_handler); 69169ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy return 0; 69269ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 69369ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardyerr3: 69469ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy unregister_netdevice_notifier(&vlan_notifier_block); 69569ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardyerr2: 69669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy vlan_proc_cleanup(); 69769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardyerr1: 698d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); 699d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanoverr0: 70069ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy return err; 70169ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy} 70269ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 70369ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardystatic void __exit vlan_cleanup_module(void) 70469ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy{ 70569ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy unsigned int i; 70669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 70769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy vlan_ioctl_set(NULL); 70869ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy vlan_netlink_fini(); 70969ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 71069ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy unregister_netdevice_notifier(&vlan_notifier_block); 71169ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 71269ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy dev_remove_pack(&vlan_packet_type); 71369ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 71469ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy /* This table must be empty if there are no module references left. */ 71569ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) 71669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy BUG_ON(!hlist_empty(&vlan_group_hash[i])); 71769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 71869ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy vlan_proc_cleanup(); 71969ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 720d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); 721d9ed0f0e2dba45eec79ffbdd841757f87712349bPavel Emelyanov 72269ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy synchronize_net(); 72369ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy} 72469ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 72569ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardymodule_init(vlan_proto_init); 72669ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardymodule_exit(vlan_cleanup_module); 72769ab4b7d6db68396dbfa827daa8d6f30f9b546a8Patrick McHardy 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_VERSION(DRV_VERSION); 730