Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * INET 802.1Q VLAN | |
3 | * Ethernet-type device handling. | |
4 | * | |
5 | * Authors: Ben Greear <greearb@candelatech.com> | |
ad712087 | 6 | * Please send support related email to: netdev@vger.kernel.org |
1da177e4 | 7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
122952fc | 8 | * |
1da177e4 LT |
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 | ||
afab2d29 JP |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/skbuff.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 | 28 | #include <linux/init.h> |
82524746 | 29 | #include <linux/rculist.h> |
1da177e4 LT |
30 | #include <net/p8022.h> |
31 | #include <net/arp.h> | |
32 | #include <linux/rtnetlink.h> | |
33 | #include <linux/notifier.h> | |
61362766 | 34 | #include <net/rtnetlink.h> |
e9dc8653 | 35 | #include <net/net_namespace.h> |
d9ed0f0e | 36 | #include <net/netns/generic.h> |
7c0f6ba6 | 37 | #include <linux/uaccess.h> |
1da177e4 LT |
38 | |
39 | #include <linux/if_vlan.h> | |
40 | #include "vlan.h" | |
41 | #include "vlanproc.h" | |
42 | ||
43 | #define DRV_VERSION "1.8" | |
44 | ||
45 | /* Global VLAN variables */ | |
46 | ||
c7d03a00 | 47 | unsigned int vlan_net_id __read_mostly; |
d9ed0f0e | 48 | |
b3020061 SH |
49 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
50 | const char vlan_version[] = DRV_VERSION; | |
1da177e4 | 51 | |
1da177e4 LT |
52 | /* End of global variables definitions. */ |
53 | ||
1fd9b1fc PM |
54 | static int vlan_group_prealloc_vid(struct vlan_group *vg, |
55 | __be16 vlan_proto, u16 vlan_id) | |
67727184 PE |
56 | { |
57 | struct net_device **array; | |
1fd9b1fc | 58 | unsigned int pidx, vidx; |
67727184 PE |
59 | unsigned int size; |
60 | ||
61 | ASSERT_RTNL(); | |
62 | ||
1fd9b1fc PM |
63 | pidx = vlan_proto_idx(vlan_proto); |
64 | vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; | |
65 | array = vg->vlan_devices_arrays[pidx][vidx]; | |
67727184 PE |
66 | if (array != NULL) |
67 | return 0; | |
68 | ||
69 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
70 | array = kzalloc(size, GFP_KERNEL); | |
71 | if (array == NULL) | |
72 | return -ENOBUFS; | |
73 | ||
1fd9b1fc | 74 | vg->vlan_devices_arrays[pidx][vidx] = array; |
67727184 | 75 | return 0; |
42429aae PM |
76 | } |
77 | ||
23289a37 | 78 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 79 | { |
7da82c06 | 80 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
af301517 | 81 | struct net_device *real_dev = vlan->real_dev; |
5b9ea6e0 | 82 | struct vlan_info *vlan_info; |
1da177e4 | 83 | struct vlan_group *grp; |
9bb8582e | 84 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
85 | |
86 | ASSERT_RTNL(); | |
acc5efbc | 87 | |
5b9ea6e0 JP |
88 | vlan_info = rtnl_dereference(real_dev->vlan_info); |
89 | BUG_ON(!vlan_info); | |
90 | ||
91 | grp = &vlan_info->grp; | |
acc5efbc | 92 | |
5b9ea6e0 | 93 | grp->nr_vlan_devs--; |
acc5efbc | 94 | |
86fbe9bb DW |
95 | if (vlan->flags & VLAN_FLAG_MVRP) |
96 | vlan_mvrp_request_leave(dev); | |
55aee10d ED |
97 | if (vlan->flags & VLAN_FLAG_GVRP) |
98 | vlan_gvrp_request_leave(dev); | |
99 | ||
1fd9b1fc | 100 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); |
47701a36 VF |
101 | |
102 | netdev_upper_dev_unlink(real_dev, dev); | |
48752e1b ED |
103 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
104 | * grace period is respected before device freeing, | |
105 | * we dont need to call synchronize_net() here. | |
106 | */ | |
23289a37 | 107 | unregister_netdevice_queue(dev, head); |
ce305002 | 108 | |
86fbe9bb DW |
109 | if (grp->nr_vlan_devs == 0) { |
110 | vlan_mvrp_uninit_applicant(real_dev); | |
70c03b49 | 111 | vlan_gvrp_uninit_applicant(real_dev); |
86fbe9bb | 112 | } |
70c03b49 | 113 | |
78bbb15f | 114 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
4a7df340 | 115 | |
af301517 PM |
116 | /* Get rid of the vlan's reference to real_dev */ |
117 | dev_put(real_dev); | |
1da177e4 LT |
118 | } |
119 | ||
1fd9b1fc | 120 | int vlan_check_real_dev(struct net_device *real_dev, |
33fa3823 DA |
121 | __be16 protocol, u16 vlan_id, |
122 | struct netlink_ext_ack *extack) | |
1da177e4 | 123 | { |
656299f7 | 124 | const char *name = real_dev->name; |
40f98e1a | 125 | |
1da177e4 | 126 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 127 | pr_info("VLANs not supported on %s\n", name); |
33fa3823 | 128 | NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); |
c1d3ee99 | 129 | return -EOPNOTSUPP; |
1da177e4 LT |
130 | } |
131 | ||
33fa3823 DA |
132 | if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { |
133 | NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); | |
c1d3ee99 | 134 | return -EEXIST; |
33fa3823 | 135 | } |
1da177e4 | 136 | |
c1d3ee99 PM |
137 | return 0; |
138 | } | |
139 | ||
42ab19ee | 140 | int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) |
e89fe42c | 141 | { |
7da82c06 | 142 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 143 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 144 | u16 vlan_id = vlan->vlan_id; |
5b9ea6e0 JP |
145 | struct vlan_info *vlan_info; |
146 | struct vlan_group *grp; | |
e89fe42c PM |
147 | int err; |
148 | ||
1fd9b1fc | 149 | err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); |
5b9ea6e0 JP |
150 | if (err) |
151 | return err; | |
152 | ||
153 | vlan_info = rtnl_dereference(real_dev->vlan_info); | |
154 | /* vlan_info should be there now. vlan_vid_add took care of it */ | |
155 | BUG_ON(!vlan_info); | |
156 | ||
157 | grp = &vlan_info->grp; | |
158 | if (grp->nr_vlan_devs == 0) { | |
70c03b49 PM |
159 | err = vlan_gvrp_init_applicant(real_dev); |
160 | if (err < 0) | |
5b9ea6e0 | 161 | goto out_vid_del; |
86fbe9bb DW |
162 | err = vlan_mvrp_init_applicant(real_dev); |
163 | if (err < 0) | |
164 | goto out_uninit_gvrp; | |
e89fe42c PM |
165 | } |
166 | ||
1fd9b1fc | 167 | err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); |
67727184 | 168 | if (err < 0) |
86fbe9bb | 169 | goto out_uninit_mvrp; |
67727184 | 170 | |
952fcfd0 | 171 | vlan->nest_level = dev_get_nest_level(real_dev) + 1; |
e89fe42c PM |
172 | err = register_netdevice(dev); |
173 | if (err < 0) | |
5df27e6c VF |
174 | goto out_uninit_mvrp; |
175 | ||
42ab19ee | 176 | err = netdev_upper_dev_link(real_dev, dev, extack); |
5df27e6c VF |
177 | if (err) |
178 | goto out_unregister_netdev; | |
e89fe42c | 179 | |
7da82c06 | 180 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
181 | dev_hold(real_dev); |
182 | ||
fc4a7489 | 183 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
184 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
185 | ||
186 | /* So, got the sucker initialized, now lets place | |
187 | * it into our local structure. | |
188 | */ | |
1fd9b1fc | 189 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
5b9ea6e0 | 190 | grp->nr_vlan_devs++; |
e89fe42c | 191 | |
e89fe42c PM |
192 | return 0; |
193 | ||
5df27e6c VF |
194 | out_unregister_netdev: |
195 | unregister_netdevice(dev); | |
86fbe9bb DW |
196 | out_uninit_mvrp: |
197 | if (grp->nr_vlan_devs == 0) | |
198 | vlan_mvrp_uninit_applicant(real_dev); | |
199 | out_uninit_gvrp: | |
5b9ea6e0 | 200 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 201 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 | 202 | out_vid_del: |
1fd9b1fc | 203 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
e89fe42c PM |
204 | return err; |
205 | } | |
206 | ||
c1d3ee99 | 207 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 208 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 209 | */ |
9bb8582e | 210 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 211 | { |
c1d3ee99 | 212 | struct net_device *new_dev; |
0c0667a8 | 213 | struct vlan_dev_priv *vlan; |
7a17a2f7 PE |
214 | struct net *net = dev_net(real_dev); |
215 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 216 | char name[IFNAMSIZ]; |
2ae0bf69 | 217 | int err; |
c1d3ee99 | 218 | |
9bb8582e | 219 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 220 | return -ERANGE; |
c1d3ee99 | 221 | |
33fa3823 DA |
222 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, |
223 | NULL); | |
2ae0bf69 PM |
224 | if (err < 0) |
225 | return err; | |
c1d3ee99 | 226 | |
1da177e4 | 227 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 228 | switch (vn->name_type) { |
1da177e4 LT |
229 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
230 | /* name will look like: eth1.0005 */ | |
9bb8582e | 231 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
232 | break; |
233 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
234 | /* Put our vlan.VID in the name. | |
235 | * Name will look like: vlan5 | |
236 | */ | |
9bb8582e | 237 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
238 | break; |
239 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
240 | /* Put our vlan.VID in the name. | |
241 | * Name will look like: eth0.5 | |
242 | */ | |
9bb8582e | 243 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
244 | break; |
245 | case VLAN_NAME_TYPE_PLUS_VID: | |
246 | /* Put our vlan.VID in the name. | |
247 | * Name will look like: vlan0005 | |
248 | */ | |
249 | default: | |
9bb8582e | 250 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 251 | } |
122952fc | 252 | |
c835a677 TG |
253 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, |
254 | NET_NAME_UNKNOWN, vlan_setup); | |
5dd8d1e9 | 255 | |
1da177e4 | 256 | if (new_dev == NULL) |
2ae0bf69 | 257 | return -ENOBUFS; |
1da177e4 | 258 | |
65d292a2 | 259 | dev_net_set(new_dev, net); |
1da177e4 LT |
260 | /* need 4 bytes for extra VLAN header info, |
261 | * hope the underlying device can handle it. | |
262 | */ | |
263 | new_dev->mtu = real_dev->mtu; | |
264 | ||
0c0667a8 WSH |
265 | vlan = vlan_dev_priv(new_dev); |
266 | vlan->vlan_proto = htons(ETH_P_8021Q); | |
267 | vlan->vlan_id = vlan_id; | |
268 | vlan->real_dev = real_dev; | |
269 | vlan->dent = NULL; | |
270 | vlan->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 271 | |
07b5b17e | 272 | new_dev->rtnl_link_ops = &vlan_link_ops; |
42ab19ee | 273 | err = register_vlan_dev(new_dev, NULL); |
2ae0bf69 | 274 | if (err < 0) |
e89fe42c | 275 | goto out_free_newdev; |
1da177e4 | 276 | |
2ae0bf69 | 277 | return 0; |
1da177e4 | 278 | |
1da177e4 | 279 | out_free_newdev: |
9745e362 GF |
280 | if (new_dev->reg_state == NETREG_UNINITIALIZED) |
281 | free_netdev(new_dev); | |
2ae0bf69 | 282 | return err; |
1da177e4 LT |
283 | } |
284 | ||
8c979c26 PM |
285 | static void vlan_sync_address(struct net_device *dev, |
286 | struct net_device *vlandev) | |
287 | { | |
7da82c06 | 288 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
289 | |
290 | /* May be called without an actual change */ | |
53a2b3a1 | 291 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
292 | return; |
293 | ||
308453aa MM |
294 | /* vlan continues to inherit address of lower device */ |
295 | if (vlan_dev_inherit_address(vlandev, dev)) | |
296 | goto out; | |
297 | ||
8c979c26 PM |
298 | /* vlan address was different from the old address and is equal to |
299 | * the new address */ | |
53a2b3a1 JP |
300 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
301 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 302 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
303 | |
304 | /* vlan address was equal to the old address and is different from | |
305 | * the new address */ | |
53a2b3a1 JP |
306 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
307 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 308 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 | 309 | |
308453aa | 310 | out: |
07fc67be | 311 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
8c979c26 PM |
312 | } |
313 | ||
5fb13570 PM |
314 | static void vlan_transfer_features(struct net_device *dev, |
315 | struct net_device *vlandev) | |
316 | { | |
fc0d48b8 VY |
317 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
318 | ||
1ae4be22 | 319 | vlandev->gso_max_size = dev->gso_max_size; |
f6773c5e | 320 | vlandev->gso_max_segs = dev->gso_max_segs; |
029f5fc3 | 321 | |
fc0d48b8 | 322 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
323 | vlandev->hard_header_len = dev->hard_header_len; |
324 | else | |
325 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
326 | ||
f4d5392e | 327 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
328 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
329 | #endif | |
8a0427bb | 330 | |
9d917c20 VF |
331 | vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
332 | vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); | |
7dad9937 | 333 | vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); |
9d917c20 | 334 | |
8a0427bb | 335 | netdev_update_features(vlandev); |
5fb13570 PM |
336 | } |
337 | ||
9c5ff24f | 338 | static int __vlan_device_event(struct net_device *dev, unsigned long event) |
802fb176 | 339 | { |
9c5ff24f WC |
340 | int err = 0; |
341 | ||
802fb176 PE |
342 | switch (event) { |
343 | case NETDEV_CHANGENAME: | |
344 | vlan_proc_rem_dev(dev); | |
9c5ff24f | 345 | err = vlan_proc_add_dev(dev); |
802fb176 | 346 | break; |
30688a9a | 347 | case NETDEV_REGISTER: |
9c5ff24f | 348 | err = vlan_proc_add_dev(dev); |
30688a9a PE |
349 | break; |
350 | case NETDEV_UNREGISTER: | |
351 | vlan_proc_rem_dev(dev); | |
352 | break; | |
802fb176 | 353 | } |
9c5ff24f WC |
354 | |
355 | return err; | |
802fb176 PE |
356 | } |
357 | ||
2029cc2c PM |
358 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
359 | void *ptr) | |
1da177e4 | 360 | { |
567c5e13 | 361 | struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); |
351638e7 | 362 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 363 | struct vlan_group *grp; |
5b9ea6e0 | 364 | struct vlan_info *vlan_info; |
1da177e4 LT |
365 | int i, flgs; |
366 | struct net_device *vlandev; | |
7da82c06 | 367 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 368 | bool last = false; |
29906f6a | 369 | LIST_HEAD(list); |
9daae9bd | 370 | int err; |
1da177e4 | 371 | |
9c5ff24f WC |
372 | if (is_vlan_dev(dev)) { |
373 | int err = __vlan_device_event(dev, event); | |
374 | ||
375 | if (err) | |
376 | return notifier_from_errno(err); | |
377 | } | |
802fb176 | 378 | |
ad1afb00 | 379 | if ((event == NETDEV_UP) && |
f646968f | 380 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 381 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 382 | dev->name); |
80d5c368 | 383 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 | 384 | } |
052d41c0 CW |
385 | if (event == NETDEV_DOWN && |
386 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) | |
387 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); | |
ad1afb00 | 388 | |
5b9ea6e0 JP |
389 | vlan_info = rtnl_dereference(dev->vlan_info); |
390 | if (!vlan_info) | |
1da177e4 | 391 | goto out; |
5b9ea6e0 | 392 | grp = &vlan_info->grp; |
1da177e4 LT |
393 | |
394 | /* It is OK that we do not hold the group lock right now, | |
395 | * as we run under the RTNL lock. | |
396 | */ | |
397 | ||
398 | switch (event) { | |
399 | case NETDEV_CHANGE: | |
400 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 401 | vlan_group_for_each_dev(grp, i, vlandev) |
fc4a7489 | 402 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
403 | break; |
404 | ||
8c979c26 PM |
405 | case NETDEV_CHANGEADDR: |
406 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 407 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
408 | flgs = vlandev->flags; |
409 | if (!(flgs & IFF_UP)) | |
410 | continue; | |
411 | ||
8c979c26 PM |
412 | vlan_sync_address(dev, vlandev); |
413 | } | |
2e477c9b HX |
414 | break; |
415 | ||
416 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 417 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
418 | if (vlandev->mtu <= dev->mtu) |
419 | continue; | |
420 | ||
421 | dev_set_mtu(vlandev, dev->mtu); | |
422 | } | |
8c979c26 PM |
423 | break; |
424 | ||
5fb13570 PM |
425 | case NETDEV_FEAT_CHANGE: |
426 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 427 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 428 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
429 | break; |
430 | ||
99c4a26a DM |
431 | case NETDEV_DOWN: { |
432 | struct net_device *tmp; | |
433 | LIST_HEAD(close_list); | |
434 | ||
1da177e4 | 435 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 436 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
437 | flgs = vlandev->flags; |
438 | if (!(flgs & IFF_UP)) | |
439 | continue; | |
440 | ||
7da82c06 | 441 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 442 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
99c4a26a DM |
443 | list_add(&vlandev->close_list, &close_list); |
444 | } | |
445 | ||
446 | dev_close_many(&close_list, false); | |
447 | ||
448 | list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { | |
fc4a7489 | 449 | netif_stacked_transfer_operstate(dev, vlandev); |
99c4a26a | 450 | list_del_init(&vlandev->close_list); |
1da177e4 | 451 | } |
99c4a26a | 452 | list_del(&close_list); |
1da177e4 | 453 | break; |
99c4a26a | 454 | } |
1da177e4 LT |
455 | case NETDEV_UP: |
456 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 457 | vlan_group_for_each_dev(grp, i, vlandev) { |
be346ffa | 458 | flgs = dev_get_flags(vlandev); |
1da177e4 LT |
459 | if (flgs & IFF_UP) |
460 | continue; | |
461 | ||
7da82c06 | 462 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 463 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
567c5e13 PM |
464 | dev_change_flags(vlandev, flgs | IFF_UP, |
465 | extack); | |
fc4a7489 | 466 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
467 | } |
468 | break; | |
122952fc | 469 | |
1da177e4 | 470 | case NETDEV_UNREGISTER: |
3b27e105 DL |
471 | /* twiddle thumbs on netns device moves */ |
472 | if (dev->reg_state != NETREG_UNREGISTERING) | |
473 | break; | |
474 | ||
1fd9b1fc | 475 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 476 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 477 | * afterwards */ |
5b9ea6e0 | 478 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 479 | last = true; |
29906f6a PM |
480 | |
481 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
482 | if (last) |
483 | break; | |
29906f6a PM |
484 | } |
485 | unregister_netdevice_many(&list); | |
1da177e4 | 486 | break; |
1c01fe14 JP |
487 | |
488 | case NETDEV_PRE_TYPE_CHANGE: | |
489 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
490 | if (vlan_uses_dev(dev)) |
491 | return NOTIFY_BAD; | |
492 | break; | |
99606477 BH |
493 | |
494 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 495 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 496 | case NETDEV_RESEND_IGMP: |
99606477 | 497 | /* Propagate to vlan devices */ |
1fd9b1fc | 498 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 499 | call_netdevice_notifiers(event, vlandev); |
99606477 | 500 | break; |
9daae9bd GP |
501 | |
502 | case NETDEV_CVLAN_FILTER_PUSH_INFO: | |
503 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); | |
504 | if (err) | |
505 | return notifier_from_errno(err); | |
506 | break; | |
507 | ||
508 | case NETDEV_CVLAN_FILTER_DROP_INFO: | |
509 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); | |
510 | break; | |
511 | ||
512 | case NETDEV_SVLAN_FILTER_PUSH_INFO: | |
513 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); | |
514 | if (err) | |
515 | return notifier_from_errno(err); | |
516 | break; | |
517 | ||
518 | case NETDEV_SVLAN_FILTER_DROP_INFO: | |
519 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); | |
520 | break; | |
3ff50b79 | 521 | } |
1da177e4 LT |
522 | |
523 | out: | |
524 | return NOTIFY_DONE; | |
525 | } | |
526 | ||
69ab4b7d PM |
527 | static struct notifier_block vlan_notifier_block __read_mostly = { |
528 | .notifier_call = vlan_device_event, | |
529 | }; | |
530 | ||
1da177e4 LT |
531 | /* |
532 | * VLAN IOCTL handler. | |
533 | * o execute requested action or pass command to the device driver | |
534 | * arg is really a struct vlan_ioctl_args __user *. | |
535 | */ | |
881d966b | 536 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 537 | { |
c17d8874 | 538 | int err; |
1da177e4 | 539 | struct vlan_ioctl_args args; |
c17d8874 | 540 | struct net_device *dev = NULL; |
1da177e4 LT |
541 | |
542 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
543 | return -EFAULT; | |
544 | ||
545 | /* Null terminate this sucker, just in case. */ | |
9c403b6b GF |
546 | args.device1[sizeof(args.device1) - 1] = 0; |
547 | args.u.device2[sizeof(args.u.device2) - 1] = 0; | |
1da177e4 | 548 | |
c17d8874 PM |
549 | rtnl_lock(); |
550 | ||
1da177e4 LT |
551 | switch (args.cmd) { |
552 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
553 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
554 | case SET_VLAN_FLAG_CMD: | |
555 | case ADD_VLAN_CMD: | |
556 | case DEL_VLAN_CMD: | |
557 | case GET_VLAN_REALDEV_NAME_CMD: | |
558 | case GET_VLAN_VID_CMD: | |
559 | err = -ENODEV; | |
65d292a2 | 560 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
561 | if (!dev) |
562 | goto out; | |
563 | ||
564 | err = -EINVAL; | |
26a25239 | 565 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
566 | goto out; |
567 | } | |
568 | ||
569 | switch (args.cmd) { | |
570 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
571 | err = -EPERM; | |
276996fd | 572 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
573 | break; |
574 | vlan_dev_set_ingress_priority(dev, | |
575 | args.u.skb_priority, | |
576 | args.vlan_qos); | |
fffe470a | 577 | err = 0; |
1da177e4 LT |
578 | break; |
579 | ||
580 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 581 | err = -EPERM; |
276996fd | 582 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
583 | break; |
584 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
585 | args.u.skb_priority, |
586 | args.vlan_qos); | |
587 | break; | |
588 | ||
589 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 590 | err = -EPERM; |
276996fd | 591 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 592 | break; |
b3ce0325 PM |
593 | err = vlan_dev_change_flags(dev, |
594 | args.vlan_qos ? args.u.flag : 0, | |
595 | args.u.flag); | |
1da177e4 LT |
596 | break; |
597 | ||
598 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 599 | err = -EPERM; |
276996fd | 600 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 601 | break; |
403f0727 | 602 | if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { |
7a17a2f7 PE |
603 | struct vlan_net *vn; |
604 | ||
605 | vn = net_generic(net, vlan_net_id); | |
606 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
607 | err = 0; |
608 | } else { | |
609 | err = -EINVAL; | |
610 | } | |
611 | break; | |
612 | ||
613 | case ADD_VLAN_CMD: | |
c17d8874 | 614 | err = -EPERM; |
276996fd | 615 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 616 | break; |
2ae0bf69 | 617 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
618 | break; |
619 | ||
620 | case DEL_VLAN_CMD: | |
c17d8874 | 621 | err = -EPERM; |
276996fd | 622 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 623 | break; |
23289a37 | 624 | unregister_vlan_dev(dev, NULL); |
af301517 | 625 | err = 0; |
1da177e4 LT |
626 | break; |
627 | ||
1da177e4 | 628 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 629 | err = 0; |
c17d8874 | 630 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 631 | if (copy_to_user(arg, &args, |
2029cc2c | 632 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 633 | err = -EFAULT; |
1da177e4 LT |
634 | break; |
635 | ||
636 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 637 | err = 0; |
22d1ba74 | 638 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 639 | if (copy_to_user(arg, &args, |
2029cc2c | 640 | sizeof(struct vlan_ioctl_args))) |
122952fc | 641 | err = -EFAULT; |
1da177e4 LT |
642 | break; |
643 | ||
644 | default: | |
198a291c | 645 | err = -EOPNOTSUPP; |
c17d8874 | 646 | break; |
3ff50b79 | 647 | } |
7eb1b3d3 | 648 | out: |
c17d8874 | 649 | rtnl_unlock(); |
1da177e4 LT |
650 | return err; |
651 | } | |
652 | ||
2c8c1e72 | 653 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 654 | { |
946d1a92 | 655 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 656 | int err; |
d9ed0f0e | 657 | |
7a17a2f7 PE |
658 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
659 | ||
cd1c7014 | 660 | err = vlan_proc_init(net); |
cd1c7014 | 661 | |
d9ed0f0e PE |
662 | return err; |
663 | } | |
664 | ||
2c8c1e72 | 665 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 666 | { |
cd1c7014 | 667 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
668 | } |
669 | ||
670 | static struct pernet_operations vlan_net_ops = { | |
671 | .init = vlan_init_net, | |
672 | .exit = vlan_exit_net, | |
946d1a92 EB |
673 | .id = &vlan_net_id, |
674 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
675 | }; |
676 | ||
69ab4b7d PM |
677 | static int __init vlan_proto_init(void) |
678 | { | |
679 | int err; | |
680 | ||
da7c06c4 | 681 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 682 | |
91e2ff35 | 683 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
684 | if (err < 0) |
685 | goto err0; | |
686 | ||
69ab4b7d PM |
687 | err = register_netdevice_notifier(&vlan_notifier_block); |
688 | if (err < 0) | |
689 | goto err2; | |
690 | ||
70c03b49 | 691 | err = vlan_gvrp_init(); |
69ab4b7d PM |
692 | if (err < 0) |
693 | goto err3; | |
694 | ||
86fbe9bb | 695 | err = vlan_mvrp_init(); |
70c03b49 PM |
696 | if (err < 0) |
697 | goto err4; | |
698 | ||
86fbe9bb DW |
699 | err = vlan_netlink_init(); |
700 | if (err < 0) | |
701 | goto err5; | |
702 | ||
69ab4b7d PM |
703 | vlan_ioctl_set(vlan_ioctl_handler); |
704 | return 0; | |
705 | ||
86fbe9bb DW |
706 | err5: |
707 | vlan_mvrp_uninit(); | |
70c03b49 PM |
708 | err4: |
709 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
710 | err3: |
711 | unregister_netdevice_notifier(&vlan_notifier_block); | |
712 | err2: | |
91e2ff35 | 713 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 714 | err0: |
69ab4b7d PM |
715 | return err; |
716 | } | |
717 | ||
718 | static void __exit vlan_cleanup_module(void) | |
719 | { | |
69ab4b7d | 720 | vlan_ioctl_set(NULL); |
66e5133f | 721 | |
69ab4b7d PM |
722 | vlan_netlink_fini(); |
723 | ||
724 | unregister_netdevice_notifier(&vlan_notifier_block); | |
725 | ||
91e2ff35 | 726 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 727 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 728 | |
86fbe9bb | 729 | vlan_mvrp_uninit(); |
70c03b49 | 730 | vlan_gvrp_uninit(); |
69ab4b7d PM |
731 | } |
732 | ||
733 | module_init(vlan_proto_init); | |
734 | module_exit(vlan_cleanup_module); | |
735 | ||
1da177e4 LT |
736 | MODULE_LICENSE("GPL"); |
737 | MODULE_VERSION(DRV_VERSION); |