| 1 | /* |
| 2 | * INET 802.1Q VLAN |
| 3 | * Ethernet-type device handling. |
| 4 | * |
| 5 | * Authors: Ben Greear <greearb@candelatech.com> |
| 6 | * Please send support related email to: netdev@vger.kernel.org |
| 7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
| 8 | * |
| 9 | * Fixes: |
| 10 | * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; |
| 11 | * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; |
| 12 | * Correct all the locking - David S. Miller <davem@redhat.com>; |
| 13 | * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License |
| 17 | * as published by the Free Software Foundation; either version |
| 18 | * 2 of the License, or (at your option) any later version. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/capability.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/skbuff.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/rculist.h> |
| 28 | #include <net/p8022.h> |
| 29 | #include <net/arp.h> |
| 30 | #include <linux/rtnetlink.h> |
| 31 | #include <linux/notifier.h> |
| 32 | #include <net/rtnetlink.h> |
| 33 | #include <net/net_namespace.h> |
| 34 | #include <net/netns/generic.h> |
| 35 | #include <asm/uaccess.h> |
| 36 | |
| 37 | #include <linux/if_vlan.h> |
| 38 | #include "vlan.h" |
| 39 | #include "vlanproc.h" |
| 40 | |
| 41 | #define DRV_VERSION "1.8" |
| 42 | |
| 43 | /* Global VLAN variables */ |
| 44 | |
| 45 | int vlan_net_id __read_mostly; |
| 46 | |
| 47 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
| 48 | const char vlan_version[] = DRV_VERSION; |
| 49 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; |
| 50 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; |
| 51 | |
| 52 | static struct packet_type vlan_packet_type __read_mostly = { |
| 53 | .type = cpu_to_be16(ETH_P_8021Q), |
| 54 | .func = vlan_skb_recv, /* VLAN receive method */ |
| 55 | }; |
| 56 | |
| 57 | /* End of global variables definitions. */ |
| 58 | |
| 59 | static void vlan_group_free(struct vlan_group *grp) |
| 60 | { |
| 61 | int i; |
| 62 | |
| 63 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
| 64 | kfree(grp->vlan_devices_arrays[i]); |
| 65 | kfree(grp); |
| 66 | } |
| 67 | |
| 68 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
| 69 | { |
| 70 | struct vlan_group *grp; |
| 71 | |
| 72 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
| 73 | if (!grp) |
| 74 | return NULL; |
| 75 | |
| 76 | grp->real_dev = real_dev; |
| 77 | return grp; |
| 78 | } |
| 79 | |
| 80 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
| 81 | { |
| 82 | struct net_device **array; |
| 83 | unsigned int size; |
| 84 | |
| 85 | ASSERT_RTNL(); |
| 86 | |
| 87 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
| 88 | if (array != NULL) |
| 89 | return 0; |
| 90 | |
| 91 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; |
| 92 | array = kzalloc(size, GFP_KERNEL); |
| 93 | if (array == NULL) |
| 94 | return -ENOBUFS; |
| 95 | |
| 96 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | static void vlan_rcu_free(struct rcu_head *rcu) |
| 101 | { |
| 102 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
| 103 | } |
| 104 | |
| 105 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
| 106 | { |
| 107 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
| 108 | struct net_device *real_dev = vlan->real_dev; |
| 109 | const struct net_device_ops *ops = real_dev->netdev_ops; |
| 110 | struct vlan_group *grp; |
| 111 | u16 vlan_id = vlan->vlan_id; |
| 112 | |
| 113 | ASSERT_RTNL(); |
| 114 | |
| 115 | grp = rtnl_dereference(real_dev->vlgrp); |
| 116 | BUG_ON(!grp); |
| 117 | |
| 118 | /* Take it out of our own structures, but be sure to interlock with |
| 119 | * HW accelerating devices or SW vlan input packet processing if |
| 120 | * VLAN is not 0 (leave it there for 802.1p). |
| 121 | */ |
| 122 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
| 123 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
| 124 | |
| 125 | grp->nr_vlans--; |
| 126 | |
| 127 | vlan_group_set_device(grp, vlan_id, NULL); |
| 128 | if (!grp->killall) |
| 129 | synchronize_net(); |
| 130 | |
| 131 | unregister_netdevice_queue(dev, head); |
| 132 | |
| 133 | /* If the group is now empty, kill off the group. */ |
| 134 | if (grp->nr_vlans == 0) { |
| 135 | vlan_gvrp_uninit_applicant(real_dev); |
| 136 | |
| 137 | rcu_assign_pointer(real_dev->vlgrp, NULL); |
| 138 | if (ops->ndo_vlan_rx_register) |
| 139 | ops->ndo_vlan_rx_register(real_dev, NULL); |
| 140 | |
| 141 | /* Free the group, after all cpu's are done. */ |
| 142 | call_rcu(&grp->rcu, vlan_rcu_free); |
| 143 | } |
| 144 | |
| 145 | /* Get rid of the vlan's reference to real_dev */ |
| 146 | dev_put(real_dev); |
| 147 | } |
| 148 | |
| 149 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
| 150 | { |
| 151 | const char *name = real_dev->name; |
| 152 | const struct net_device_ops *ops = real_dev->netdev_ops; |
| 153 | |
| 154 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
| 155 | pr_info("8021q: VLANs not supported on %s\n", name); |
| 156 | return -EOPNOTSUPP; |
| 157 | } |
| 158 | |
| 159 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
| 160 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
| 161 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
| 162 | return -EOPNOTSUPP; |
| 163 | } |
| 164 | |
| 165 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
| 166 | return -EEXIST; |
| 167 | |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | int register_vlan_dev(struct net_device *dev) |
| 172 | { |
| 173 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
| 174 | struct net_device *real_dev = vlan->real_dev; |
| 175 | const struct net_device_ops *ops = real_dev->netdev_ops; |
| 176 | u16 vlan_id = vlan->vlan_id; |
| 177 | struct vlan_group *grp, *ngrp = NULL; |
| 178 | int err; |
| 179 | |
| 180 | grp = rtnl_dereference(real_dev->vlgrp); |
| 181 | if (!grp) { |
| 182 | ngrp = grp = vlan_group_alloc(real_dev); |
| 183 | if (!grp) |
| 184 | return -ENOBUFS; |
| 185 | err = vlan_gvrp_init_applicant(real_dev); |
| 186 | if (err < 0) |
| 187 | goto out_free_group; |
| 188 | } |
| 189 | |
| 190 | err = vlan_group_prealloc_vid(grp, vlan_id); |
| 191 | if (err < 0) |
| 192 | goto out_uninit_applicant; |
| 193 | |
| 194 | err = register_netdevice(dev); |
| 195 | if (err < 0) |
| 196 | goto out_uninit_applicant; |
| 197 | |
| 198 | /* Account for reference in struct vlan_dev_info */ |
| 199 | dev_hold(real_dev); |
| 200 | |
| 201 | netif_stacked_transfer_operstate(real_dev, dev); |
| 202 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
| 203 | |
| 204 | /* So, got the sucker initialized, now lets place |
| 205 | * it into our local structure. |
| 206 | */ |
| 207 | vlan_group_set_device(grp, vlan_id, dev); |
| 208 | grp->nr_vlans++; |
| 209 | |
| 210 | if (ngrp) { |
| 211 | if (ops->ndo_vlan_rx_register) |
| 212 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
| 213 | rcu_assign_pointer(real_dev->vlgrp, ngrp); |
| 214 | } |
| 215 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
| 216 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
| 217 | |
| 218 | return 0; |
| 219 | |
| 220 | out_uninit_applicant: |
| 221 | if (ngrp) |
| 222 | vlan_gvrp_uninit_applicant(real_dev); |
| 223 | out_free_group: |
| 224 | if (ngrp) { |
| 225 | /* Free the group, after all cpu's are done. */ |
| 226 | call_rcu(&ngrp->rcu, vlan_rcu_free); |
| 227 | } |
| 228 | return err; |
| 229 | } |
| 230 | |
| 231 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
| 232 | * Returns 0 if the device was created or a negative error code otherwise. |
| 233 | */ |
| 234 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
| 235 | { |
| 236 | struct net_device *new_dev; |
| 237 | struct net *net = dev_net(real_dev); |
| 238 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
| 239 | char name[IFNAMSIZ]; |
| 240 | int err; |
| 241 | |
| 242 | if (vlan_id >= VLAN_VID_MASK) |
| 243 | return -ERANGE; |
| 244 | |
| 245 | err = vlan_check_real_dev(real_dev, vlan_id); |
| 246 | if (err < 0) |
| 247 | return err; |
| 248 | |
| 249 | /* Gotta set up the fields for the device. */ |
| 250 | switch (vn->name_type) { |
| 251 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
| 252 | /* name will look like: eth1.0005 */ |
| 253 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
| 254 | break; |
| 255 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: |
| 256 | /* Put our vlan.VID in the name. |
| 257 | * Name will look like: vlan5 |
| 258 | */ |
| 259 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
| 260 | break; |
| 261 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: |
| 262 | /* Put our vlan.VID in the name. |
| 263 | * Name will look like: eth0.5 |
| 264 | */ |
| 265 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
| 266 | break; |
| 267 | case VLAN_NAME_TYPE_PLUS_VID: |
| 268 | /* Put our vlan.VID in the name. |
| 269 | * Name will look like: vlan0005 |
| 270 | */ |
| 271 | default: |
| 272 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
| 273 | } |
| 274 | |
| 275 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
| 276 | vlan_setup, real_dev->num_tx_queues); |
| 277 | |
| 278 | if (new_dev == NULL) |
| 279 | return -ENOBUFS; |
| 280 | |
| 281 | netif_copy_real_num_queues(new_dev, real_dev); |
| 282 | dev_net_set(new_dev, net); |
| 283 | /* need 4 bytes for extra VLAN header info, |
| 284 | * hope the underlying device can handle it. |
| 285 | */ |
| 286 | new_dev->mtu = real_dev->mtu; |
| 287 | |
| 288 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
| 289 | vlan_dev_info(new_dev)->real_dev = real_dev; |
| 290 | vlan_dev_info(new_dev)->dent = NULL; |
| 291 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
| 292 | |
| 293 | new_dev->rtnl_link_ops = &vlan_link_ops; |
| 294 | err = register_vlan_dev(new_dev); |
| 295 | if (err < 0) |
| 296 | goto out_free_newdev; |
| 297 | |
| 298 | return 0; |
| 299 | |
| 300 | out_free_newdev: |
| 301 | free_netdev(new_dev); |
| 302 | return err; |
| 303 | } |
| 304 | |
| 305 | static void vlan_sync_address(struct net_device *dev, |
| 306 | struct net_device *vlandev) |
| 307 | { |
| 308 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
| 309 | |
| 310 | /* May be called without an actual change */ |
| 311 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) |
| 312 | return; |
| 313 | |
| 314 | /* vlan address was different from the old address and is equal to |
| 315 | * the new address */ |
| 316 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 317 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 318 | dev_uc_del(dev, vlandev->dev_addr); |
| 319 | |
| 320 | /* vlan address was equal to the old address and is different from |
| 321 | * the new address */ |
| 322 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 323 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 324 | dev_uc_add(dev, vlandev->dev_addr); |
| 325 | |
| 326 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); |
| 327 | } |
| 328 | |
| 329 | static void vlan_transfer_features(struct net_device *dev, |
| 330 | struct net_device *vlandev) |
| 331 | { |
| 332 | unsigned long old_features = vlandev->features; |
| 333 | |
| 334 | vlandev->features &= ~dev->vlan_features; |
| 335 | vlandev->features |= dev->features & dev->vlan_features; |
| 336 | vlandev->gso_max_size = dev->gso_max_size; |
| 337 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| 338 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
| 339 | #endif |
| 340 | vlandev->real_num_tx_queues = dev->real_num_tx_queues; |
| 341 | BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues); |
| 342 | |
| 343 | if (old_features != vlandev->features) |
| 344 | netdev_features_change(vlandev); |
| 345 | } |
| 346 | |
| 347 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
| 348 | { |
| 349 | switch (event) { |
| 350 | case NETDEV_CHANGENAME: |
| 351 | vlan_proc_rem_dev(dev); |
| 352 | if (vlan_proc_add_dev(dev) < 0) |
| 353 | pr_warning("8021q: failed to change proc name for %s\n", |
| 354 | dev->name); |
| 355 | break; |
| 356 | case NETDEV_REGISTER: |
| 357 | if (vlan_proc_add_dev(dev) < 0) |
| 358 | pr_warning("8021q: failed to add proc entry for %s\n", |
| 359 | dev->name); |
| 360 | break; |
| 361 | case NETDEV_UNREGISTER: |
| 362 | vlan_proc_rem_dev(dev); |
| 363 | break; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
| 368 | void *ptr) |
| 369 | { |
| 370 | struct net_device *dev = ptr; |
| 371 | struct vlan_group *grp; |
| 372 | int i, flgs; |
| 373 | struct net_device *vlandev; |
| 374 | struct vlan_dev_info *vlan; |
| 375 | LIST_HEAD(list); |
| 376 | |
| 377 | if (is_vlan_dev(dev)) |
| 378 | __vlan_device_event(dev, event); |
| 379 | |
| 380 | if ((event == NETDEV_UP) && |
| 381 | (dev->features & NETIF_F_HW_VLAN_FILTER) && |
| 382 | dev->netdev_ops->ndo_vlan_rx_add_vid) { |
| 383 | pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", |
| 384 | dev->name); |
| 385 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); |
| 386 | } |
| 387 | |
| 388 | grp = rtnl_dereference(dev->vlgrp); |
| 389 | if (!grp) |
| 390 | goto out; |
| 391 | |
| 392 | /* It is OK that we do not hold the group lock right now, |
| 393 | * as we run under the RTNL lock. |
| 394 | */ |
| 395 | |
| 396 | switch (event) { |
| 397 | case NETDEV_CHANGE: |
| 398 | /* Propagate real device state to vlan devices */ |
| 399 | for (i = 0; i < VLAN_N_VID; i++) { |
| 400 | vlandev = vlan_group_get_device(grp, i); |
| 401 | if (!vlandev) |
| 402 | continue; |
| 403 | |
| 404 | netif_stacked_transfer_operstate(dev, vlandev); |
| 405 | } |
| 406 | break; |
| 407 | |
| 408 | case NETDEV_CHANGEADDR: |
| 409 | /* Adjust unicast filters on underlying device */ |
| 410 | for (i = 0; i < VLAN_N_VID; i++) { |
| 411 | vlandev = vlan_group_get_device(grp, i); |
| 412 | if (!vlandev) |
| 413 | continue; |
| 414 | |
| 415 | flgs = vlandev->flags; |
| 416 | if (!(flgs & IFF_UP)) |
| 417 | continue; |
| 418 | |
| 419 | vlan_sync_address(dev, vlandev); |
| 420 | } |
| 421 | break; |
| 422 | |
| 423 | case NETDEV_CHANGEMTU: |
| 424 | for (i = 0; i < VLAN_N_VID; i++) { |
| 425 | vlandev = vlan_group_get_device(grp, i); |
| 426 | if (!vlandev) |
| 427 | continue; |
| 428 | |
| 429 | if (vlandev->mtu <= dev->mtu) |
| 430 | continue; |
| 431 | |
| 432 | dev_set_mtu(vlandev, dev->mtu); |
| 433 | } |
| 434 | break; |
| 435 | |
| 436 | case NETDEV_FEAT_CHANGE: |
| 437 | /* Propagate device features to underlying device */ |
| 438 | for (i = 0; i < VLAN_N_VID; i++) { |
| 439 | vlandev = vlan_group_get_device(grp, i); |
| 440 | if (!vlandev) |
| 441 | continue; |
| 442 | |
| 443 | vlan_transfer_features(dev, vlandev); |
| 444 | } |
| 445 | |
| 446 | break; |
| 447 | |
| 448 | case NETDEV_DOWN: |
| 449 | /* Put all VLANs for this dev in the down state too. */ |
| 450 | for (i = 0; i < VLAN_N_VID; i++) { |
| 451 | vlandev = vlan_group_get_device(grp, i); |
| 452 | if (!vlandev) |
| 453 | continue; |
| 454 | |
| 455 | flgs = vlandev->flags; |
| 456 | if (!(flgs & IFF_UP)) |
| 457 | continue; |
| 458 | |
| 459 | vlan = vlan_dev_info(vlandev); |
| 460 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| 461 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
| 462 | netif_stacked_transfer_operstate(dev, vlandev); |
| 463 | } |
| 464 | break; |
| 465 | |
| 466 | case NETDEV_UP: |
| 467 | /* Put all VLANs for this dev in the up state too. */ |
| 468 | for (i = 0; i < VLAN_N_VID; i++) { |
| 469 | vlandev = vlan_group_get_device(grp, i); |
| 470 | if (!vlandev) |
| 471 | continue; |
| 472 | |
| 473 | flgs = vlandev->flags; |
| 474 | if (flgs & IFF_UP) |
| 475 | continue; |
| 476 | |
| 477 | vlan = vlan_dev_info(vlandev); |
| 478 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| 479 | dev_change_flags(vlandev, flgs | IFF_UP); |
| 480 | netif_stacked_transfer_operstate(dev, vlandev); |
| 481 | } |
| 482 | break; |
| 483 | |
| 484 | case NETDEV_UNREGISTER: |
| 485 | /* twiddle thumbs on netns device moves */ |
| 486 | if (dev->reg_state != NETREG_UNREGISTERING) |
| 487 | break; |
| 488 | |
| 489 | /* Delete all VLANs for this dev. */ |
| 490 | grp->killall = 1; |
| 491 | |
| 492 | for (i = 0; i < VLAN_N_VID; i++) { |
| 493 | vlandev = vlan_group_get_device(grp, i); |
| 494 | if (!vlandev) |
| 495 | continue; |
| 496 | |
| 497 | /* unregistration of last vlan destroys group, abort |
| 498 | * afterwards */ |
| 499 | if (grp->nr_vlans == 1) |
| 500 | i = VLAN_N_VID; |
| 501 | |
| 502 | unregister_vlan_dev(vlandev, &list); |
| 503 | } |
| 504 | unregister_netdevice_many(&list); |
| 505 | break; |
| 506 | |
| 507 | case NETDEV_PRE_TYPE_CHANGE: |
| 508 | /* Forbid underlaying device to change its type. */ |
| 509 | return NOTIFY_BAD; |
| 510 | } |
| 511 | |
| 512 | out: |
| 513 | return NOTIFY_DONE; |
| 514 | } |
| 515 | |
| 516 | static struct notifier_block vlan_notifier_block __read_mostly = { |
| 517 | .notifier_call = vlan_device_event, |
| 518 | }; |
| 519 | |
| 520 | /* |
| 521 | * VLAN IOCTL handler. |
| 522 | * o execute requested action or pass command to the device driver |
| 523 | * arg is really a struct vlan_ioctl_args __user *. |
| 524 | */ |
| 525 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
| 526 | { |
| 527 | int err; |
| 528 | struct vlan_ioctl_args args; |
| 529 | struct net_device *dev = NULL; |
| 530 | |
| 531 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) |
| 532 | return -EFAULT; |
| 533 | |
| 534 | /* Null terminate this sucker, just in case. */ |
| 535 | args.device1[23] = 0; |
| 536 | args.u.device2[23] = 0; |
| 537 | |
| 538 | rtnl_lock(); |
| 539 | |
| 540 | switch (args.cmd) { |
| 541 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 542 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
| 543 | case SET_VLAN_FLAG_CMD: |
| 544 | case ADD_VLAN_CMD: |
| 545 | case DEL_VLAN_CMD: |
| 546 | case GET_VLAN_REALDEV_NAME_CMD: |
| 547 | case GET_VLAN_VID_CMD: |
| 548 | err = -ENODEV; |
| 549 | dev = __dev_get_by_name(net, args.device1); |
| 550 | if (!dev) |
| 551 | goto out; |
| 552 | |
| 553 | err = -EINVAL; |
| 554 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
| 555 | goto out; |
| 556 | } |
| 557 | |
| 558 | switch (args.cmd) { |
| 559 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 560 | err = -EPERM; |
| 561 | if (!capable(CAP_NET_ADMIN)) |
| 562 | break; |
| 563 | vlan_dev_set_ingress_priority(dev, |
| 564 | args.u.skb_priority, |
| 565 | args.vlan_qos); |
| 566 | err = 0; |
| 567 | break; |
| 568 | |
| 569 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
| 570 | err = -EPERM; |
| 571 | if (!capable(CAP_NET_ADMIN)) |
| 572 | break; |
| 573 | err = vlan_dev_set_egress_priority(dev, |
| 574 | args.u.skb_priority, |
| 575 | args.vlan_qos); |
| 576 | break; |
| 577 | |
| 578 | case SET_VLAN_FLAG_CMD: |
| 579 | err = -EPERM; |
| 580 | if (!capable(CAP_NET_ADMIN)) |
| 581 | break; |
| 582 | err = vlan_dev_change_flags(dev, |
| 583 | args.vlan_qos ? args.u.flag : 0, |
| 584 | args.u.flag); |
| 585 | break; |
| 586 | |
| 587 | case SET_VLAN_NAME_TYPE_CMD: |
| 588 | err = -EPERM; |
| 589 | if (!capable(CAP_NET_ADMIN)) |
| 590 | break; |
| 591 | if ((args.u.name_type >= 0) && |
| 592 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
| 593 | struct vlan_net *vn; |
| 594 | |
| 595 | vn = net_generic(net, vlan_net_id); |
| 596 | vn->name_type = args.u.name_type; |
| 597 | err = 0; |
| 598 | } else { |
| 599 | err = -EINVAL; |
| 600 | } |
| 601 | break; |
| 602 | |
| 603 | case ADD_VLAN_CMD: |
| 604 | err = -EPERM; |
| 605 | if (!capable(CAP_NET_ADMIN)) |
| 606 | break; |
| 607 | err = register_vlan_device(dev, args.u.VID); |
| 608 | break; |
| 609 | |
| 610 | case DEL_VLAN_CMD: |
| 611 | err = -EPERM; |
| 612 | if (!capable(CAP_NET_ADMIN)) |
| 613 | break; |
| 614 | unregister_vlan_dev(dev, NULL); |
| 615 | err = 0; |
| 616 | break; |
| 617 | |
| 618 | case GET_VLAN_REALDEV_NAME_CMD: |
| 619 | err = 0; |
| 620 | vlan_dev_get_realdev_name(dev, args.u.device2); |
| 621 | if (copy_to_user(arg, &args, |
| 622 | sizeof(struct vlan_ioctl_args))) |
| 623 | err = -EFAULT; |
| 624 | break; |
| 625 | |
| 626 | case GET_VLAN_VID_CMD: |
| 627 | err = 0; |
| 628 | args.u.VID = vlan_dev_vlan_id(dev); |
| 629 | if (copy_to_user(arg, &args, |
| 630 | sizeof(struct vlan_ioctl_args))) |
| 631 | err = -EFAULT; |
| 632 | break; |
| 633 | |
| 634 | default: |
| 635 | err = -EOPNOTSUPP; |
| 636 | break; |
| 637 | } |
| 638 | out: |
| 639 | rtnl_unlock(); |
| 640 | return err; |
| 641 | } |
| 642 | |
| 643 | static int __net_init vlan_init_net(struct net *net) |
| 644 | { |
| 645 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
| 646 | int err; |
| 647 | |
| 648 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
| 649 | |
| 650 | err = vlan_proc_init(net); |
| 651 | |
| 652 | return err; |
| 653 | } |
| 654 | |
| 655 | static void __net_exit vlan_exit_net(struct net *net) |
| 656 | { |
| 657 | vlan_proc_cleanup(net); |
| 658 | } |
| 659 | |
| 660 | static struct pernet_operations vlan_net_ops = { |
| 661 | .init = vlan_init_net, |
| 662 | .exit = vlan_exit_net, |
| 663 | .id = &vlan_net_id, |
| 664 | .size = sizeof(struct vlan_net), |
| 665 | }; |
| 666 | |
| 667 | static int __init vlan_proto_init(void) |
| 668 | { |
| 669 | int err; |
| 670 | |
| 671 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); |
| 672 | pr_info("All bugs added by %s\n", vlan_buggyright); |
| 673 | |
| 674 | err = register_pernet_subsys(&vlan_net_ops); |
| 675 | if (err < 0) |
| 676 | goto err0; |
| 677 | |
| 678 | err = register_netdevice_notifier(&vlan_notifier_block); |
| 679 | if (err < 0) |
| 680 | goto err2; |
| 681 | |
| 682 | err = vlan_gvrp_init(); |
| 683 | if (err < 0) |
| 684 | goto err3; |
| 685 | |
| 686 | err = vlan_netlink_init(); |
| 687 | if (err < 0) |
| 688 | goto err4; |
| 689 | |
| 690 | dev_add_pack(&vlan_packet_type); |
| 691 | vlan_ioctl_set(vlan_ioctl_handler); |
| 692 | return 0; |
| 693 | |
| 694 | err4: |
| 695 | vlan_gvrp_uninit(); |
| 696 | err3: |
| 697 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 698 | err2: |
| 699 | unregister_pernet_subsys(&vlan_net_ops); |
| 700 | err0: |
| 701 | return err; |
| 702 | } |
| 703 | |
| 704 | static void __exit vlan_cleanup_module(void) |
| 705 | { |
| 706 | vlan_ioctl_set(NULL); |
| 707 | vlan_netlink_fini(); |
| 708 | |
| 709 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 710 | |
| 711 | dev_remove_pack(&vlan_packet_type); |
| 712 | |
| 713 | unregister_pernet_subsys(&vlan_net_ops); |
| 714 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
| 715 | |
| 716 | vlan_gvrp_uninit(); |
| 717 | } |
| 718 | |
| 719 | module_init(vlan_proto_init); |
| 720 | module_exit(vlan_cleanup_module); |
| 721 | |
| 722 | MODULE_LICENSE("GPL"); |
| 723 | MODULE_VERSION(DRV_VERSION); |