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 PM |
120 | int vlan_check_real_dev(struct net_device *real_dev, |
121 | __be16 protocol, u16 vlan_id) | |
1da177e4 | 122 | { |
656299f7 | 123 | const char *name = real_dev->name; |
40f98e1a | 124 | |
1da177e4 | 125 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 126 | pr_info("VLANs not supported on %s\n", name); |
c1d3ee99 | 127 | return -EOPNOTSUPP; |
1da177e4 LT |
128 | } |
129 | ||
1fd9b1fc | 130 | if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) |
c1d3ee99 | 131 | return -EEXIST; |
1da177e4 | 132 | |
c1d3ee99 PM |
133 | return 0; |
134 | } | |
135 | ||
42ab19ee | 136 | int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) |
e89fe42c | 137 | { |
7da82c06 | 138 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 139 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 140 | u16 vlan_id = vlan->vlan_id; |
5b9ea6e0 JP |
141 | struct vlan_info *vlan_info; |
142 | struct vlan_group *grp; | |
e89fe42c PM |
143 | int err; |
144 | ||
1fd9b1fc | 145 | err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); |
5b9ea6e0 JP |
146 | if (err) |
147 | return err; | |
148 | ||
149 | vlan_info = rtnl_dereference(real_dev->vlan_info); | |
150 | /* vlan_info should be there now. vlan_vid_add took care of it */ | |
151 | BUG_ON(!vlan_info); | |
152 | ||
153 | grp = &vlan_info->grp; | |
154 | if (grp->nr_vlan_devs == 0) { | |
70c03b49 PM |
155 | err = vlan_gvrp_init_applicant(real_dev); |
156 | if (err < 0) | |
5b9ea6e0 | 157 | goto out_vid_del; |
86fbe9bb DW |
158 | err = vlan_mvrp_init_applicant(real_dev); |
159 | if (err < 0) | |
160 | goto out_uninit_gvrp; | |
e89fe42c PM |
161 | } |
162 | ||
1fd9b1fc | 163 | err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); |
67727184 | 164 | if (err < 0) |
86fbe9bb | 165 | goto out_uninit_mvrp; |
67727184 | 166 | |
952fcfd0 | 167 | vlan->nest_level = dev_get_nest_level(real_dev) + 1; |
e89fe42c PM |
168 | err = register_netdevice(dev); |
169 | if (err < 0) | |
5df27e6c VF |
170 | goto out_uninit_mvrp; |
171 | ||
42ab19ee | 172 | err = netdev_upper_dev_link(real_dev, dev, extack); |
5df27e6c VF |
173 | if (err) |
174 | goto out_unregister_netdev; | |
e89fe42c | 175 | |
7da82c06 | 176 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
177 | dev_hold(real_dev); |
178 | ||
fc4a7489 | 179 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
180 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
181 | ||
182 | /* So, got the sucker initialized, now lets place | |
183 | * it into our local structure. | |
184 | */ | |
1fd9b1fc | 185 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
5b9ea6e0 | 186 | grp->nr_vlan_devs++; |
e89fe42c | 187 | |
e89fe42c PM |
188 | return 0; |
189 | ||
5df27e6c VF |
190 | out_unregister_netdev: |
191 | unregister_netdevice(dev); | |
86fbe9bb DW |
192 | out_uninit_mvrp: |
193 | if (grp->nr_vlan_devs == 0) | |
194 | vlan_mvrp_uninit_applicant(real_dev); | |
195 | out_uninit_gvrp: | |
5b9ea6e0 | 196 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 197 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 | 198 | out_vid_del: |
1fd9b1fc | 199 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
e89fe42c PM |
200 | return err; |
201 | } | |
202 | ||
c1d3ee99 | 203 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 204 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 205 | */ |
9bb8582e | 206 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 207 | { |
c1d3ee99 | 208 | struct net_device *new_dev; |
0c0667a8 | 209 | struct vlan_dev_priv *vlan; |
7a17a2f7 PE |
210 | struct net *net = dev_net(real_dev); |
211 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 212 | char name[IFNAMSIZ]; |
2ae0bf69 | 213 | int err; |
c1d3ee99 | 214 | |
9bb8582e | 215 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 216 | return -ERANGE; |
c1d3ee99 | 217 | |
1fd9b1fc | 218 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id); |
2ae0bf69 PM |
219 | if (err < 0) |
220 | return err; | |
c1d3ee99 | 221 | |
1da177e4 | 222 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 223 | switch (vn->name_type) { |
1da177e4 LT |
224 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
225 | /* name will look like: eth1.0005 */ | |
9bb8582e | 226 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
227 | break; |
228 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
229 | /* Put our vlan.VID in the name. | |
230 | * Name will look like: vlan5 | |
231 | */ | |
9bb8582e | 232 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
233 | break; |
234 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
235 | /* Put our vlan.VID in the name. | |
236 | * Name will look like: eth0.5 | |
237 | */ | |
9bb8582e | 238 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
239 | break; |
240 | case VLAN_NAME_TYPE_PLUS_VID: | |
241 | /* Put our vlan.VID in the name. | |
242 | * Name will look like: vlan0005 | |
243 | */ | |
244 | default: | |
9bb8582e | 245 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 246 | } |
122952fc | 247 | |
c835a677 TG |
248 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, |
249 | NET_NAME_UNKNOWN, vlan_setup); | |
5dd8d1e9 | 250 | |
1da177e4 | 251 | if (new_dev == NULL) |
2ae0bf69 | 252 | return -ENOBUFS; |
1da177e4 | 253 | |
65d292a2 | 254 | dev_net_set(new_dev, net); |
1da177e4 LT |
255 | /* need 4 bytes for extra VLAN header info, |
256 | * hope the underlying device can handle it. | |
257 | */ | |
258 | new_dev->mtu = real_dev->mtu; | |
259 | ||
0c0667a8 WSH |
260 | vlan = vlan_dev_priv(new_dev); |
261 | vlan->vlan_proto = htons(ETH_P_8021Q); | |
262 | vlan->vlan_id = vlan_id; | |
263 | vlan->real_dev = real_dev; | |
264 | vlan->dent = NULL; | |
265 | vlan->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 266 | |
07b5b17e | 267 | new_dev->rtnl_link_ops = &vlan_link_ops; |
42ab19ee | 268 | err = register_vlan_dev(new_dev, NULL); |
2ae0bf69 | 269 | if (err < 0) |
e89fe42c | 270 | goto out_free_newdev; |
1da177e4 | 271 | |
2ae0bf69 | 272 | return 0; |
1da177e4 | 273 | |
1da177e4 | 274 | out_free_newdev: |
9745e362 GF |
275 | if (new_dev->reg_state == NETREG_UNINITIALIZED) |
276 | free_netdev(new_dev); | |
2ae0bf69 | 277 | return err; |
1da177e4 LT |
278 | } |
279 | ||
8c979c26 PM |
280 | static void vlan_sync_address(struct net_device *dev, |
281 | struct net_device *vlandev) | |
282 | { | |
7da82c06 | 283 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
284 | |
285 | /* May be called without an actual change */ | |
53a2b3a1 | 286 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
287 | return; |
288 | ||
308453aa MM |
289 | /* vlan continues to inherit address of lower device */ |
290 | if (vlan_dev_inherit_address(vlandev, dev)) | |
291 | goto out; | |
292 | ||
8c979c26 PM |
293 | /* vlan address was different from the old address and is equal to |
294 | * the new address */ | |
53a2b3a1 JP |
295 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
296 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 297 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
298 | |
299 | /* vlan address was equal to the old address and is different from | |
300 | * the new address */ | |
53a2b3a1 JP |
301 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
302 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 303 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 | 304 | |
308453aa | 305 | out: |
07fc67be | 306 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
8c979c26 PM |
307 | } |
308 | ||
5fb13570 PM |
309 | static void vlan_transfer_features(struct net_device *dev, |
310 | struct net_device *vlandev) | |
311 | { | |
fc0d48b8 VY |
312 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
313 | ||
1ae4be22 | 314 | vlandev->gso_max_size = dev->gso_max_size; |
f6773c5e | 315 | vlandev->gso_max_segs = dev->gso_max_segs; |
029f5fc3 | 316 | |
fc0d48b8 | 317 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
318 | vlandev->hard_header_len = dev->hard_header_len; |
319 | else | |
320 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
321 | ||
f4d5392e | 322 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
323 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
324 | #endif | |
8a0427bb | 325 | |
9d917c20 VF |
326 | vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
327 | vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); | |
328 | ||
8a0427bb | 329 | netdev_update_features(vlandev); |
5fb13570 PM |
330 | } |
331 | ||
9c5ff24f | 332 | static int __vlan_device_event(struct net_device *dev, unsigned long event) |
802fb176 | 333 | { |
9c5ff24f WC |
334 | int err = 0; |
335 | ||
802fb176 PE |
336 | switch (event) { |
337 | case NETDEV_CHANGENAME: | |
338 | vlan_proc_rem_dev(dev); | |
9c5ff24f | 339 | err = vlan_proc_add_dev(dev); |
802fb176 | 340 | break; |
30688a9a | 341 | case NETDEV_REGISTER: |
9c5ff24f | 342 | err = vlan_proc_add_dev(dev); |
30688a9a PE |
343 | break; |
344 | case NETDEV_UNREGISTER: | |
345 | vlan_proc_rem_dev(dev); | |
346 | break; | |
802fb176 | 347 | } |
9c5ff24f WC |
348 | |
349 | return err; | |
802fb176 PE |
350 | } |
351 | ||
2029cc2c PM |
352 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
353 | void *ptr) | |
1da177e4 | 354 | { |
351638e7 | 355 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 356 | struct vlan_group *grp; |
5b9ea6e0 | 357 | struct vlan_info *vlan_info; |
1da177e4 LT |
358 | int i, flgs; |
359 | struct net_device *vlandev; | |
7da82c06 | 360 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 361 | bool last = false; |
29906f6a | 362 | LIST_HEAD(list); |
9daae9bd | 363 | int err; |
1da177e4 | 364 | |
9c5ff24f WC |
365 | if (is_vlan_dev(dev)) { |
366 | int err = __vlan_device_event(dev, event); | |
367 | ||
368 | if (err) | |
369 | return notifier_from_errno(err); | |
370 | } | |
802fb176 | 371 | |
ad1afb00 | 372 | if ((event == NETDEV_UP) && |
f646968f | 373 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 374 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 375 | dev->name); |
80d5c368 | 376 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 | 377 | } |
052d41c0 CW |
378 | if (event == NETDEV_DOWN && |
379 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) | |
380 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); | |
ad1afb00 | 381 | |
5b9ea6e0 JP |
382 | vlan_info = rtnl_dereference(dev->vlan_info); |
383 | if (!vlan_info) | |
1da177e4 | 384 | goto out; |
5b9ea6e0 | 385 | grp = &vlan_info->grp; |
1da177e4 LT |
386 | |
387 | /* It is OK that we do not hold the group lock right now, | |
388 | * as we run under the RTNL lock. | |
389 | */ | |
390 | ||
391 | switch (event) { | |
392 | case NETDEV_CHANGE: | |
393 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 394 | vlan_group_for_each_dev(grp, i, vlandev) |
fc4a7489 | 395 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
396 | break; |
397 | ||
8c979c26 PM |
398 | case NETDEV_CHANGEADDR: |
399 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 400 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
401 | flgs = vlandev->flags; |
402 | if (!(flgs & IFF_UP)) | |
403 | continue; | |
404 | ||
8c979c26 PM |
405 | vlan_sync_address(dev, vlandev); |
406 | } | |
2e477c9b HX |
407 | break; |
408 | ||
409 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 410 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
411 | if (vlandev->mtu <= dev->mtu) |
412 | continue; | |
413 | ||
414 | dev_set_mtu(vlandev, dev->mtu); | |
415 | } | |
8c979c26 PM |
416 | break; |
417 | ||
5fb13570 PM |
418 | case NETDEV_FEAT_CHANGE: |
419 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 420 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 421 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
422 | break; |
423 | ||
99c4a26a DM |
424 | case NETDEV_DOWN: { |
425 | struct net_device *tmp; | |
426 | LIST_HEAD(close_list); | |
427 | ||
1da177e4 | 428 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 429 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
430 | flgs = vlandev->flags; |
431 | if (!(flgs & IFF_UP)) | |
432 | continue; | |
433 | ||
7da82c06 | 434 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 435 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
99c4a26a DM |
436 | list_add(&vlandev->close_list, &close_list); |
437 | } | |
438 | ||
439 | dev_close_many(&close_list, false); | |
440 | ||
441 | list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { | |
fc4a7489 | 442 | netif_stacked_transfer_operstate(dev, vlandev); |
99c4a26a | 443 | list_del_init(&vlandev->close_list); |
1da177e4 | 444 | } |
99c4a26a | 445 | list_del(&close_list); |
1da177e4 | 446 | break; |
99c4a26a | 447 | } |
1da177e4 LT |
448 | case NETDEV_UP: |
449 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 450 | vlan_group_for_each_dev(grp, i, vlandev) { |
be346ffa | 451 | flgs = dev_get_flags(vlandev); |
1da177e4 LT |
452 | if (flgs & IFF_UP) |
453 | continue; | |
454 | ||
7da82c06 | 455 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
456 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
457 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 458 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
459 | } |
460 | break; | |
122952fc | 461 | |
1da177e4 | 462 | case NETDEV_UNREGISTER: |
3b27e105 DL |
463 | /* twiddle thumbs on netns device moves */ |
464 | if (dev->reg_state != NETREG_UNREGISTERING) | |
465 | break; | |
466 | ||
1fd9b1fc | 467 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 468 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 469 | * afterwards */ |
5b9ea6e0 | 470 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 471 | last = true; |
29906f6a PM |
472 | |
473 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
474 | if (last) |
475 | break; | |
29906f6a PM |
476 | } |
477 | unregister_netdevice_many(&list); | |
1da177e4 | 478 | break; |
1c01fe14 JP |
479 | |
480 | case NETDEV_PRE_TYPE_CHANGE: | |
481 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
482 | if (vlan_uses_dev(dev)) |
483 | return NOTIFY_BAD; | |
484 | break; | |
99606477 BH |
485 | |
486 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 487 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 488 | case NETDEV_RESEND_IGMP: |
99606477 | 489 | /* Propagate to vlan devices */ |
1fd9b1fc | 490 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 491 | call_netdevice_notifiers(event, vlandev); |
99606477 | 492 | break; |
9daae9bd GP |
493 | |
494 | case NETDEV_CVLAN_FILTER_PUSH_INFO: | |
495 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); | |
496 | if (err) | |
497 | return notifier_from_errno(err); | |
498 | break; | |
499 | ||
500 | case NETDEV_CVLAN_FILTER_DROP_INFO: | |
501 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); | |
502 | break; | |
503 | ||
504 | case NETDEV_SVLAN_FILTER_PUSH_INFO: | |
505 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); | |
506 | if (err) | |
507 | return notifier_from_errno(err); | |
508 | break; | |
509 | ||
510 | case NETDEV_SVLAN_FILTER_DROP_INFO: | |
511 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); | |
512 | break; | |
3ff50b79 | 513 | } |
1da177e4 LT |
514 | |
515 | out: | |
516 | return NOTIFY_DONE; | |
517 | } | |
518 | ||
69ab4b7d PM |
519 | static struct notifier_block vlan_notifier_block __read_mostly = { |
520 | .notifier_call = vlan_device_event, | |
521 | }; | |
522 | ||
1da177e4 LT |
523 | /* |
524 | * VLAN IOCTL handler. | |
525 | * o execute requested action or pass command to the device driver | |
526 | * arg is really a struct vlan_ioctl_args __user *. | |
527 | */ | |
881d966b | 528 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 529 | { |
c17d8874 | 530 | int err; |
1da177e4 | 531 | struct vlan_ioctl_args args; |
c17d8874 | 532 | struct net_device *dev = NULL; |
1da177e4 LT |
533 | |
534 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
535 | return -EFAULT; | |
536 | ||
537 | /* Null terminate this sucker, just in case. */ | |
9c403b6b GF |
538 | args.device1[sizeof(args.device1) - 1] = 0; |
539 | args.u.device2[sizeof(args.u.device2) - 1] = 0; | |
1da177e4 | 540 | |
c17d8874 PM |
541 | rtnl_lock(); |
542 | ||
1da177e4 LT |
543 | switch (args.cmd) { |
544 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
545 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
546 | case SET_VLAN_FLAG_CMD: | |
547 | case ADD_VLAN_CMD: | |
548 | case DEL_VLAN_CMD: | |
549 | case GET_VLAN_REALDEV_NAME_CMD: | |
550 | case GET_VLAN_VID_CMD: | |
551 | err = -ENODEV; | |
65d292a2 | 552 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
553 | if (!dev) |
554 | goto out; | |
555 | ||
556 | err = -EINVAL; | |
26a25239 | 557 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
558 | goto out; |
559 | } | |
560 | ||
561 | switch (args.cmd) { | |
562 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
563 | err = -EPERM; | |
276996fd | 564 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
565 | break; |
566 | vlan_dev_set_ingress_priority(dev, | |
567 | args.u.skb_priority, | |
568 | args.vlan_qos); | |
fffe470a | 569 | err = 0; |
1da177e4 LT |
570 | break; |
571 | ||
572 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 573 | err = -EPERM; |
276996fd | 574 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
575 | break; |
576 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
577 | args.u.skb_priority, |
578 | args.vlan_qos); | |
579 | break; | |
580 | ||
581 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 582 | err = -EPERM; |
276996fd | 583 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 584 | break; |
b3ce0325 PM |
585 | err = vlan_dev_change_flags(dev, |
586 | args.vlan_qos ? args.u.flag : 0, | |
587 | args.u.flag); | |
1da177e4 LT |
588 | break; |
589 | ||
590 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 591 | err = -EPERM; |
276996fd | 592 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 593 | break; |
403f0727 | 594 | if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { |
7a17a2f7 PE |
595 | struct vlan_net *vn; |
596 | ||
597 | vn = net_generic(net, vlan_net_id); | |
598 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
599 | err = 0; |
600 | } else { | |
601 | err = -EINVAL; | |
602 | } | |
603 | break; | |
604 | ||
605 | case ADD_VLAN_CMD: | |
c17d8874 | 606 | err = -EPERM; |
276996fd | 607 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 608 | break; |
2ae0bf69 | 609 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
610 | break; |
611 | ||
612 | case DEL_VLAN_CMD: | |
c17d8874 | 613 | err = -EPERM; |
276996fd | 614 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 615 | break; |
23289a37 | 616 | unregister_vlan_dev(dev, NULL); |
af301517 | 617 | err = 0; |
1da177e4 LT |
618 | break; |
619 | ||
1da177e4 | 620 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 621 | err = 0; |
c17d8874 | 622 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 623 | if (copy_to_user(arg, &args, |
2029cc2c | 624 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 625 | err = -EFAULT; |
1da177e4 LT |
626 | break; |
627 | ||
628 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 629 | err = 0; |
22d1ba74 | 630 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 631 | if (copy_to_user(arg, &args, |
2029cc2c | 632 | sizeof(struct vlan_ioctl_args))) |
122952fc | 633 | err = -EFAULT; |
1da177e4 LT |
634 | break; |
635 | ||
636 | default: | |
198a291c | 637 | err = -EOPNOTSUPP; |
c17d8874 | 638 | break; |
3ff50b79 | 639 | } |
7eb1b3d3 | 640 | out: |
c17d8874 | 641 | rtnl_unlock(); |
1da177e4 LT |
642 | return err; |
643 | } | |
644 | ||
66e5133f TM |
645 | static struct sk_buff **vlan_gro_receive(struct sk_buff **head, |
646 | struct sk_buff *skb) | |
647 | { | |
648 | struct sk_buff *p, **pp = NULL; | |
649 | struct vlan_hdr *vhdr; | |
650 | unsigned int hlen, off_vlan; | |
651 | const struct packet_offload *ptype; | |
652 | __be16 type; | |
653 | int flush = 1; | |
654 | ||
655 | off_vlan = skb_gro_offset(skb); | |
656 | hlen = off_vlan + sizeof(*vhdr); | |
657 | vhdr = skb_gro_header_fast(skb, off_vlan); | |
658 | if (skb_gro_header_hard(skb, hlen)) { | |
659 | vhdr = skb_gro_header_slow(skb, hlen, off_vlan); | |
660 | if (unlikely(!vhdr)) | |
661 | goto out; | |
662 | } | |
663 | ||
664 | type = vhdr->h_vlan_encapsulated_proto; | |
665 | ||
666 | rcu_read_lock(); | |
667 | ptype = gro_find_receive_by_type(type); | |
668 | if (!ptype) | |
669 | goto out_unlock; | |
670 | ||
671 | flush = 0; | |
672 | ||
673 | for (p = *head; p; p = p->next) { | |
674 | struct vlan_hdr *vhdr2; | |
675 | ||
676 | if (!NAPI_GRO_CB(p)->same_flow) | |
677 | continue; | |
678 | ||
679 | vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); | |
680 | if (compare_vlan_header(vhdr, vhdr2)) | |
681 | NAPI_GRO_CB(p)->same_flow = 0; | |
682 | } | |
683 | ||
684 | skb_gro_pull(skb, sizeof(*vhdr)); | |
685 | skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); | |
fcd91dd4 | 686 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
66e5133f TM |
687 | |
688 | out_unlock: | |
689 | rcu_read_unlock(); | |
690 | out: | |
691 | NAPI_GRO_CB(skb)->flush |= flush; | |
692 | ||
693 | return pp; | |
694 | } | |
695 | ||
696 | static int vlan_gro_complete(struct sk_buff *skb, int nhoff) | |
697 | { | |
698 | struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); | |
699 | __be16 type = vhdr->h_vlan_encapsulated_proto; | |
700 | struct packet_offload *ptype; | |
701 | int err = -ENOENT; | |
702 | ||
703 | rcu_read_lock(); | |
704 | ptype = gro_find_complete_by_type(type); | |
705 | if (ptype) | |
706 | err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr)); | |
707 | ||
708 | rcu_read_unlock(); | |
709 | return err; | |
710 | } | |
711 | ||
712 | static struct packet_offload vlan_packet_offloads[] __read_mostly = { | |
713 | { | |
714 | .type = cpu_to_be16(ETH_P_8021Q), | |
715 | .priority = 10, | |
716 | .callbacks = { | |
717 | .gro_receive = vlan_gro_receive, | |
718 | .gro_complete = vlan_gro_complete, | |
719 | }, | |
720 | }, | |
721 | { | |
722 | .type = cpu_to_be16(ETH_P_8021AD), | |
723 | .priority = 10, | |
724 | .callbacks = { | |
725 | .gro_receive = vlan_gro_receive, | |
726 | .gro_complete = vlan_gro_complete, | |
727 | }, | |
728 | }, | |
729 | }; | |
730 | ||
2c8c1e72 | 731 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 732 | { |
946d1a92 | 733 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 734 | int err; |
d9ed0f0e | 735 | |
7a17a2f7 PE |
736 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
737 | ||
cd1c7014 | 738 | err = vlan_proc_init(net); |
cd1c7014 | 739 | |
d9ed0f0e PE |
740 | return err; |
741 | } | |
742 | ||
2c8c1e72 | 743 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 744 | { |
cd1c7014 | 745 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
746 | } |
747 | ||
748 | static struct pernet_operations vlan_net_ops = { | |
749 | .init = vlan_init_net, | |
750 | .exit = vlan_exit_net, | |
946d1a92 EB |
751 | .id = &vlan_net_id, |
752 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
753 | }; |
754 | ||
69ab4b7d PM |
755 | static int __init vlan_proto_init(void) |
756 | { | |
757 | int err; | |
66e5133f | 758 | unsigned int i; |
69ab4b7d | 759 | |
da7c06c4 | 760 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 761 | |
91e2ff35 | 762 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
763 | if (err < 0) |
764 | goto err0; | |
765 | ||
69ab4b7d PM |
766 | err = register_netdevice_notifier(&vlan_notifier_block); |
767 | if (err < 0) | |
768 | goto err2; | |
769 | ||
70c03b49 | 770 | err = vlan_gvrp_init(); |
69ab4b7d PM |
771 | if (err < 0) |
772 | goto err3; | |
773 | ||
86fbe9bb | 774 | err = vlan_mvrp_init(); |
70c03b49 PM |
775 | if (err < 0) |
776 | goto err4; | |
777 | ||
86fbe9bb DW |
778 | err = vlan_netlink_init(); |
779 | if (err < 0) | |
780 | goto err5; | |
781 | ||
66e5133f TM |
782 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) |
783 | dev_add_offload(&vlan_packet_offloads[i]); | |
784 | ||
69ab4b7d PM |
785 | vlan_ioctl_set(vlan_ioctl_handler); |
786 | return 0; | |
787 | ||
86fbe9bb DW |
788 | err5: |
789 | vlan_mvrp_uninit(); | |
70c03b49 PM |
790 | err4: |
791 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
792 | err3: |
793 | unregister_netdevice_notifier(&vlan_notifier_block); | |
794 | err2: | |
91e2ff35 | 795 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 796 | err0: |
69ab4b7d PM |
797 | return err; |
798 | } | |
799 | ||
800 | static void __exit vlan_cleanup_module(void) | |
801 | { | |
66e5133f TM |
802 | unsigned int i; |
803 | ||
69ab4b7d | 804 | vlan_ioctl_set(NULL); |
66e5133f TM |
805 | |
806 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) | |
807 | dev_remove_offload(&vlan_packet_offloads[i]); | |
808 | ||
69ab4b7d PM |
809 | vlan_netlink_fini(); |
810 | ||
811 | unregister_netdevice_notifier(&vlan_notifier_block); | |
812 | ||
91e2ff35 | 813 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 814 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 815 | |
86fbe9bb | 816 | vlan_mvrp_uninit(); |
70c03b49 | 817 | vlan_gvrp_uninit(); |
69ab4b7d PM |
818 | } |
819 | ||
820 | module_init(vlan_proto_init); | |
821 | module_exit(vlan_cleanup_module); | |
822 | ||
1da177e4 LT |
823 | MODULE_LICENSE("GPL"); |
824 | MODULE_VERSION(DRV_VERSION); |