Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * INET 802.1Q VLAN | |
4 | * Ethernet-type device handling. | |
5 | * | |
6 | * Authors: Ben Greear <greearb@candelatech.com> | |
ad712087 | 7 | * Please send support related email to: netdev@vger.kernel.org |
1da177e4 | 8 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
122952fc | 9 | * |
1da177e4 LT |
10 | * Fixes: |
11 | * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; | |
12 | * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; | |
13 | * Correct all the locking - David S. Miller <davem@redhat.com>; | |
14 | * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> | |
1da177e4 LT |
15 | */ |
16 | ||
afab2d29 JP |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | ||
4fc268d2 | 19 | #include <linux/capability.h> |
1da177e4 LT |
20 | #include <linux/module.h> |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/skbuff.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 | 24 | #include <linux/init.h> |
82524746 | 25 | #include <linux/rculist.h> |
1da177e4 LT |
26 | #include <net/p8022.h> |
27 | #include <net/arp.h> | |
28 | #include <linux/rtnetlink.h> | |
29 | #include <linux/notifier.h> | |
61362766 | 30 | #include <net/rtnetlink.h> |
e9dc8653 | 31 | #include <net/net_namespace.h> |
d9ed0f0e | 32 | #include <net/netns/generic.h> |
7c0f6ba6 | 33 | #include <linux/uaccess.h> |
1da177e4 LT |
34 | |
35 | #include <linux/if_vlan.h> | |
36 | #include "vlan.h" | |
37 | #include "vlanproc.h" | |
38 | ||
39 | #define DRV_VERSION "1.8" | |
40 | ||
41 | /* Global VLAN variables */ | |
42 | ||
c7d03a00 | 43 | unsigned int vlan_net_id __read_mostly; |
d9ed0f0e | 44 | |
b3020061 SH |
45 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
46 | const char vlan_version[] = DRV_VERSION; | |
1da177e4 | 47 | |
1da177e4 LT |
48 | /* End of global variables definitions. */ |
49 | ||
1fd9b1fc PM |
50 | static int vlan_group_prealloc_vid(struct vlan_group *vg, |
51 | __be16 vlan_proto, u16 vlan_id) | |
67727184 PE |
52 | { |
53 | struct net_device **array; | |
0675c285 | 54 | unsigned int vidx; |
67727184 | 55 | unsigned int size; |
0675c285 | 56 | int pidx; |
67727184 PE |
57 | |
58 | ASSERT_RTNL(); | |
59 | ||
1fd9b1fc | 60 | pidx = vlan_proto_idx(vlan_proto); |
d0186842 FF |
61 | if (pidx < 0) |
62 | return -EINVAL; | |
63 | ||
1fd9b1fc PM |
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; | |
a89893dd | 70 | array = kzalloc(size, GFP_KERNEL_ACCOUNT); |
67727184 PE |
71 | if (array == NULL) |
72 | return -ENOBUFS; | |
73 | ||
c1102e9d DZ |
74 | /* paired with smp_rmb() in __vlan_group_get_device() */ |
75 | smp_wmb(); | |
76 | ||
1fd9b1fc | 77 | vg->vlan_devices_arrays[pidx][vidx] = array; |
67727184 | 78 | return 0; |
42429aae PM |
79 | } |
80 | ||
76052d8c MM |
81 | static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, |
82 | struct net_device *dev, | |
83 | struct vlan_dev_priv *vlan) | |
84 | { | |
85 | if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) | |
86 | netif_stacked_transfer_operstate(rootdev, dev); | |
87 | } | |
88 | ||
23289a37 | 89 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 90 | { |
7da82c06 | 91 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
af301517 | 92 | struct net_device *real_dev = vlan->real_dev; |
5b9ea6e0 | 93 | struct vlan_info *vlan_info; |
1da177e4 | 94 | struct vlan_group *grp; |
9bb8582e | 95 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
96 | |
97 | ASSERT_RTNL(); | |
acc5efbc | 98 | |
5b9ea6e0 JP |
99 | vlan_info = rtnl_dereference(real_dev->vlan_info); |
100 | BUG_ON(!vlan_info); | |
101 | ||
102 | grp = &vlan_info->grp; | |
acc5efbc | 103 | |
5b9ea6e0 | 104 | grp->nr_vlan_devs--; |
acc5efbc | 105 | |
86fbe9bb DW |
106 | if (vlan->flags & VLAN_FLAG_MVRP) |
107 | vlan_mvrp_request_leave(dev); | |
55aee10d ED |
108 | if (vlan->flags & VLAN_FLAG_GVRP) |
109 | vlan_gvrp_request_leave(dev); | |
110 | ||
1fd9b1fc | 111 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); |
47701a36 VF |
112 | |
113 | netdev_upper_dev_unlink(real_dev, dev); | |
48752e1b ED |
114 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
115 | * grace period is respected before device freeing, | |
116 | * we dont need to call synchronize_net() here. | |
117 | */ | |
23289a37 | 118 | unregister_netdevice_queue(dev, head); |
ce305002 | 119 | |
86fbe9bb DW |
120 | if (grp->nr_vlan_devs == 0) { |
121 | vlan_mvrp_uninit_applicant(real_dev); | |
70c03b49 | 122 | vlan_gvrp_uninit_applicant(real_dev); |
86fbe9bb | 123 | } |
70c03b49 | 124 | |
78bbb15f | 125 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
1da177e4 LT |
126 | } |
127 | ||
1fd9b1fc | 128 | int vlan_check_real_dev(struct net_device *real_dev, |
33fa3823 DA |
129 | __be16 protocol, u16 vlan_id, |
130 | struct netlink_ext_ack *extack) | |
1da177e4 | 131 | { |
656299f7 | 132 | const char *name = real_dev->name; |
40f98e1a | 133 | |
1da177e4 | 134 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 135 | pr_info("VLANs not supported on %s\n", name); |
33fa3823 | 136 | NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); |
c1d3ee99 | 137 | return -EOPNOTSUPP; |
1da177e4 LT |
138 | } |
139 | ||
33fa3823 DA |
140 | if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { |
141 | NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); | |
c1d3ee99 | 142 | return -EEXIST; |
33fa3823 | 143 | } |
1da177e4 | 144 | |
c1d3ee99 PM |
145 | return 0; |
146 | } | |
147 | ||
42ab19ee | 148 | int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) |
e89fe42c | 149 | { |
7da82c06 | 150 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 151 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 152 | u16 vlan_id = vlan->vlan_id; |
5b9ea6e0 JP |
153 | struct vlan_info *vlan_info; |
154 | struct vlan_group *grp; | |
e89fe42c PM |
155 | int err; |
156 | ||
1fd9b1fc | 157 | err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); |
5b9ea6e0 JP |
158 | if (err) |
159 | return err; | |
160 | ||
161 | vlan_info = rtnl_dereference(real_dev->vlan_info); | |
162 | /* vlan_info should be there now. vlan_vid_add took care of it */ | |
163 | BUG_ON(!vlan_info); | |
164 | ||
165 | grp = &vlan_info->grp; | |
166 | if (grp->nr_vlan_devs == 0) { | |
70c03b49 PM |
167 | err = vlan_gvrp_init_applicant(real_dev); |
168 | if (err < 0) | |
5b9ea6e0 | 169 | goto out_vid_del; |
86fbe9bb DW |
170 | err = vlan_mvrp_init_applicant(real_dev); |
171 | if (err < 0) | |
172 | goto out_uninit_gvrp; | |
e89fe42c PM |
173 | } |
174 | ||
1fd9b1fc | 175 | err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); |
67727184 | 176 | if (err < 0) |
86fbe9bb | 177 | goto out_uninit_mvrp; |
67727184 | 178 | |
e89fe42c PM |
179 | err = register_netdevice(dev); |
180 | if (err < 0) | |
5df27e6c VF |
181 | goto out_uninit_mvrp; |
182 | ||
42ab19ee | 183 | err = netdev_upper_dev_link(real_dev, dev, extack); |
5df27e6c VF |
184 | if (err) |
185 | goto out_unregister_netdev; | |
e89fe42c | 186 | |
76052d8c | 187 | vlan_stacked_transfer_operstate(real_dev, dev, vlan); |
e89fe42c PM |
188 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
189 | ||
190 | /* So, got the sucker initialized, now lets place | |
191 | * it into our local structure. | |
192 | */ | |
1fd9b1fc | 193 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
5b9ea6e0 | 194 | grp->nr_vlan_devs++; |
e89fe42c | 195 | |
e89fe42c PM |
196 | return 0; |
197 | ||
5df27e6c VF |
198 | out_unregister_netdev: |
199 | unregister_netdevice(dev); | |
86fbe9bb DW |
200 | out_uninit_mvrp: |
201 | if (grp->nr_vlan_devs == 0) | |
202 | vlan_mvrp_uninit_applicant(real_dev); | |
203 | out_uninit_gvrp: | |
5b9ea6e0 | 204 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 205 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 | 206 | out_vid_del: |
1fd9b1fc | 207 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
e89fe42c PM |
208 | return err; |
209 | } | |
210 | ||
c1d3ee99 | 211 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 212 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 213 | */ |
9bb8582e | 214 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 215 | { |
c1d3ee99 | 216 | struct net_device *new_dev; |
0c0667a8 | 217 | struct vlan_dev_priv *vlan; |
7a17a2f7 PE |
218 | struct net *net = dev_net(real_dev); |
219 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 220 | char name[IFNAMSIZ]; |
2ae0bf69 | 221 | int err; |
c1d3ee99 | 222 | |
9bb8582e | 223 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 224 | return -ERANGE; |
c1d3ee99 | 225 | |
33fa3823 DA |
226 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, |
227 | NULL); | |
2ae0bf69 PM |
228 | if (err < 0) |
229 | return err; | |
c1d3ee99 | 230 | |
1da177e4 | 231 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 232 | switch (vn->name_type) { |
1da177e4 LT |
233 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
234 | /* name will look like: eth1.0005 */ | |
9bb8582e | 235 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
236 | break; |
237 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
238 | /* Put our vlan.VID in the name. | |
239 | * Name will look like: vlan5 | |
240 | */ | |
9bb8582e | 241 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
242 | break; |
243 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
244 | /* Put our vlan.VID in the name. | |
245 | * Name will look like: eth0.5 | |
246 | */ | |
9bb8582e | 247 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
248 | break; |
249 | case VLAN_NAME_TYPE_PLUS_VID: | |
250 | /* Put our vlan.VID in the name. | |
251 | * Name will look like: vlan0005 | |
252 | */ | |
253 | default: | |
9bb8582e | 254 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 255 | } |
122952fc | 256 | |
c835a677 TG |
257 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, |
258 | NET_NAME_UNKNOWN, vlan_setup); | |
5dd8d1e9 | 259 | |
1da177e4 | 260 | if (new_dev == NULL) |
2ae0bf69 | 261 | return -ENOBUFS; |
1da177e4 | 262 | |
65d292a2 | 263 | dev_net_set(new_dev, net); |
1da177e4 LT |
264 | /* need 4 bytes for extra VLAN header info, |
265 | * hope the underlying device can handle it. | |
266 | */ | |
267 | new_dev->mtu = real_dev->mtu; | |
268 | ||
0c0667a8 WSH |
269 | vlan = vlan_dev_priv(new_dev); |
270 | vlan->vlan_proto = htons(ETH_P_8021Q); | |
271 | vlan->vlan_id = vlan_id; | |
272 | vlan->real_dev = real_dev; | |
273 | vlan->dent = NULL; | |
274 | vlan->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 275 | |
07b5b17e | 276 | new_dev->rtnl_link_ops = &vlan_link_ops; |
42ab19ee | 277 | err = register_vlan_dev(new_dev, NULL); |
2ae0bf69 | 278 | if (err < 0) |
e89fe42c | 279 | goto out_free_newdev; |
1da177e4 | 280 | |
2ae0bf69 | 281 | return 0; |
1da177e4 | 282 | |
1da177e4 | 283 | out_free_newdev: |
c269a24c | 284 | free_netdev(new_dev); |
2ae0bf69 | 285 | return err; |
1da177e4 LT |
286 | } |
287 | ||
8c979c26 PM |
288 | static void vlan_sync_address(struct net_device *dev, |
289 | struct net_device *vlandev) | |
290 | { | |
7da82c06 | 291 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
292 | |
293 | /* May be called without an actual change */ | |
53a2b3a1 | 294 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
295 | return; |
296 | ||
308453aa MM |
297 | /* vlan continues to inherit address of lower device */ |
298 | if (vlan_dev_inherit_address(vlandev, dev)) | |
299 | goto out; | |
300 | ||
8c979c26 PM |
301 | /* vlan address was different from the old address and is equal to |
302 | * the new address */ | |
53a2b3a1 JP |
303 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
304 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 305 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
306 | |
307 | /* vlan address was equal to the old address and is different from | |
308 | * the new address */ | |
53a2b3a1 JP |
309 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
310 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 311 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 | 312 | |
308453aa | 313 | out: |
07fc67be | 314 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
8c979c26 PM |
315 | } |
316 | ||
5fb13570 PM |
317 | static void vlan_transfer_features(struct net_device *dev, |
318 | struct net_device *vlandev) | |
319 | { | |
fc0d48b8 VY |
320 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
321 | ||
6df6398f | 322 | netif_inherit_tso_max(vlandev, dev); |
029f5fc3 | 323 | |
fc0d48b8 | 324 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
325 | vlandev->hard_header_len = dev->hard_header_len; |
326 | else | |
327 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
328 | ||
f4d5392e | 329 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
330 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
331 | #endif | |
8a0427bb | 332 | |
9d917c20 VF |
333 | vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
334 | vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); | |
7dad9937 | 335 | vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); |
9d917c20 | 336 | |
8a0427bb | 337 | netdev_update_features(vlandev); |
5fb13570 PM |
338 | } |
339 | ||
9c5ff24f | 340 | static int __vlan_device_event(struct net_device *dev, unsigned long event) |
802fb176 | 341 | { |
9c5ff24f WC |
342 | int err = 0; |
343 | ||
802fb176 PE |
344 | switch (event) { |
345 | case NETDEV_CHANGENAME: | |
346 | vlan_proc_rem_dev(dev); | |
9c5ff24f | 347 | err = vlan_proc_add_dev(dev); |
802fb176 | 348 | break; |
30688a9a | 349 | case NETDEV_REGISTER: |
9c5ff24f | 350 | err = vlan_proc_add_dev(dev); |
30688a9a PE |
351 | break; |
352 | case NETDEV_UNREGISTER: | |
353 | vlan_proc_rem_dev(dev); | |
354 | break; | |
802fb176 | 355 | } |
9c5ff24f WC |
356 | |
357 | return err; | |
802fb176 PE |
358 | } |
359 | ||
2029cc2c PM |
360 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
361 | void *ptr) | |
1da177e4 | 362 | { |
567c5e13 | 363 | struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); |
351638e7 | 364 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 365 | struct vlan_group *grp; |
5b9ea6e0 | 366 | struct vlan_info *vlan_info; |
1da177e4 LT |
367 | int i, flgs; |
368 | struct net_device *vlandev; | |
7da82c06 | 369 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 370 | bool last = false; |
29906f6a | 371 | LIST_HEAD(list); |
9daae9bd | 372 | int err; |
1da177e4 | 373 | |
9c5ff24f WC |
374 | if (is_vlan_dev(dev)) { |
375 | int err = __vlan_device_event(dev, event); | |
376 | ||
377 | if (err) | |
378 | return notifier_from_errno(err); | |
379 | } | |
802fb176 | 380 | |
ad1afb00 | 381 | if ((event == NETDEV_UP) && |
f646968f | 382 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 383 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 384 | dev->name); |
80d5c368 | 385 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 | 386 | } |
052d41c0 CW |
387 | if (event == NETDEV_DOWN && |
388 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) | |
389 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); | |
ad1afb00 | 390 | |
5b9ea6e0 JP |
391 | vlan_info = rtnl_dereference(dev->vlan_info); |
392 | if (!vlan_info) | |
1da177e4 | 393 | goto out; |
5b9ea6e0 | 394 | grp = &vlan_info->grp; |
1da177e4 LT |
395 | |
396 | /* It is OK that we do not hold the group lock right now, | |
397 | * as we run under the RTNL lock. | |
398 | */ | |
399 | ||
400 | switch (event) { | |
401 | case NETDEV_CHANGE: | |
402 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 403 | vlan_group_for_each_dev(grp, i, vlandev) |
76052d8c MM |
404 | vlan_stacked_transfer_operstate(dev, vlandev, |
405 | vlan_dev_priv(vlandev)); | |
1da177e4 LT |
406 | break; |
407 | ||
8c979c26 PM |
408 | case NETDEV_CHANGEADDR: |
409 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 410 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
411 | flgs = vlandev->flags; |
412 | if (!(flgs & IFF_UP)) | |
413 | continue; | |
414 | ||
8c979c26 PM |
415 | vlan_sync_address(dev, vlandev); |
416 | } | |
2e477c9b HX |
417 | break; |
418 | ||
419 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 420 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
421 | if (vlandev->mtu <= dev->mtu) |
422 | continue; | |
423 | ||
424 | dev_set_mtu(vlandev, dev->mtu); | |
425 | } | |
8c979c26 PM |
426 | break; |
427 | ||
5fb13570 PM |
428 | case NETDEV_FEAT_CHANGE: |
429 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 430 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 431 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
432 | break; |
433 | ||
99c4a26a DM |
434 | case NETDEV_DOWN: { |
435 | struct net_device *tmp; | |
436 | LIST_HEAD(close_list); | |
437 | ||
1da177e4 | 438 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 439 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
440 | flgs = vlandev->flags; |
441 | if (!(flgs & IFF_UP)) | |
442 | continue; | |
443 | ||
7da82c06 | 444 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 445 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
99c4a26a DM |
446 | list_add(&vlandev->close_list, &close_list); |
447 | } | |
448 | ||
449 | dev_close_many(&close_list, false); | |
450 | ||
451 | list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { | |
76052d8c MM |
452 | vlan_stacked_transfer_operstate(dev, vlandev, |
453 | vlan_dev_priv(vlandev)); | |
99c4a26a | 454 | list_del_init(&vlandev->close_list); |
1da177e4 | 455 | } |
99c4a26a | 456 | list_del(&close_list); |
1da177e4 | 457 | break; |
99c4a26a | 458 | } |
1da177e4 LT |
459 | case NETDEV_UP: |
460 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 461 | vlan_group_for_each_dev(grp, i, vlandev) { |
be346ffa | 462 | flgs = dev_get_flags(vlandev); |
1da177e4 LT |
463 | if (flgs & IFF_UP) |
464 | continue; | |
465 | ||
7da82c06 | 466 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 467 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
567c5e13 PM |
468 | dev_change_flags(vlandev, flgs | IFF_UP, |
469 | extack); | |
76052d8c | 470 | vlan_stacked_transfer_operstate(dev, vlandev, vlan); |
1da177e4 LT |
471 | } |
472 | break; | |
122952fc | 473 | |
1da177e4 | 474 | case NETDEV_UNREGISTER: |
3b27e105 DL |
475 | /* twiddle thumbs on netns device moves */ |
476 | if (dev->reg_state != NETREG_UNREGISTERING) | |
477 | break; | |
478 | ||
1fd9b1fc | 479 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 480 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 481 | * afterwards */ |
5b9ea6e0 | 482 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 483 | last = true; |
29906f6a PM |
484 | |
485 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
486 | if (last) |
487 | break; | |
29906f6a PM |
488 | } |
489 | unregister_netdevice_many(&list); | |
1da177e4 | 490 | break; |
1c01fe14 JP |
491 | |
492 | case NETDEV_PRE_TYPE_CHANGE: | |
493 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
494 | if (vlan_uses_dev(dev)) |
495 | return NOTIFY_BAD; | |
496 | break; | |
99606477 BH |
497 | |
498 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 499 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 500 | case NETDEV_RESEND_IGMP: |
99606477 | 501 | /* Propagate to vlan devices */ |
1fd9b1fc | 502 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 503 | call_netdevice_notifiers(event, vlandev); |
99606477 | 504 | break; |
9daae9bd GP |
505 | |
506 | case NETDEV_CVLAN_FILTER_PUSH_INFO: | |
507 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); | |
508 | if (err) | |
509 | return notifier_from_errno(err); | |
510 | break; | |
511 | ||
512 | case NETDEV_CVLAN_FILTER_DROP_INFO: | |
513 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); | |
514 | break; | |
515 | ||
516 | case NETDEV_SVLAN_FILTER_PUSH_INFO: | |
517 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); | |
518 | if (err) | |
519 | return notifier_from_errno(err); | |
520 | break; | |
521 | ||
522 | case NETDEV_SVLAN_FILTER_DROP_INFO: | |
523 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); | |
524 | break; | |
3ff50b79 | 525 | } |
1da177e4 LT |
526 | |
527 | out: | |
528 | return NOTIFY_DONE; | |
529 | } | |
530 | ||
69ab4b7d PM |
531 | static struct notifier_block vlan_notifier_block __read_mostly = { |
532 | .notifier_call = vlan_device_event, | |
533 | }; | |
534 | ||
1da177e4 LT |
535 | /* |
536 | * VLAN IOCTL handler. | |
537 | * o execute requested action or pass command to the device driver | |
538 | * arg is really a struct vlan_ioctl_args __user *. | |
539 | */ | |
881d966b | 540 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 541 | { |
c17d8874 | 542 | int err; |
1da177e4 | 543 | struct vlan_ioctl_args args; |
c17d8874 | 544 | struct net_device *dev = NULL; |
1da177e4 LT |
545 | |
546 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
547 | return -EFAULT; | |
548 | ||
549 | /* Null terminate this sucker, just in case. */ | |
9c403b6b GF |
550 | args.device1[sizeof(args.device1) - 1] = 0; |
551 | args.u.device2[sizeof(args.u.device2) - 1] = 0; | |
1da177e4 | 552 | |
c17d8874 PM |
553 | rtnl_lock(); |
554 | ||
1da177e4 LT |
555 | switch (args.cmd) { |
556 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
557 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
558 | case SET_VLAN_FLAG_CMD: | |
559 | case ADD_VLAN_CMD: | |
560 | case DEL_VLAN_CMD: | |
561 | case GET_VLAN_REALDEV_NAME_CMD: | |
562 | case GET_VLAN_VID_CMD: | |
563 | err = -ENODEV; | |
65d292a2 | 564 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
565 | if (!dev) |
566 | goto out; | |
567 | ||
568 | err = -EINVAL; | |
26a25239 | 569 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
570 | goto out; |
571 | } | |
572 | ||
573 | switch (args.cmd) { | |
574 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
575 | err = -EPERM; | |
276996fd | 576 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
577 | break; |
578 | vlan_dev_set_ingress_priority(dev, | |
579 | args.u.skb_priority, | |
580 | args.vlan_qos); | |
fffe470a | 581 | err = 0; |
1da177e4 LT |
582 | break; |
583 | ||
584 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 585 | err = -EPERM; |
276996fd | 586 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
587 | break; |
588 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
589 | args.u.skb_priority, |
590 | args.vlan_qos); | |
591 | break; | |
592 | ||
593 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 594 | err = -EPERM; |
276996fd | 595 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 596 | break; |
b3ce0325 PM |
597 | err = vlan_dev_change_flags(dev, |
598 | args.vlan_qos ? args.u.flag : 0, | |
599 | args.u.flag); | |
1da177e4 LT |
600 | break; |
601 | ||
602 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 603 | err = -EPERM; |
276996fd | 604 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 605 | break; |
403f0727 | 606 | if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { |
7a17a2f7 PE |
607 | struct vlan_net *vn; |
608 | ||
609 | vn = net_generic(net, vlan_net_id); | |
610 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
611 | err = 0; |
612 | } else { | |
613 | err = -EINVAL; | |
614 | } | |
615 | break; | |
616 | ||
617 | case ADD_VLAN_CMD: | |
c17d8874 | 618 | err = -EPERM; |
276996fd | 619 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 620 | break; |
2ae0bf69 | 621 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
622 | break; |
623 | ||
624 | case DEL_VLAN_CMD: | |
c17d8874 | 625 | err = -EPERM; |
276996fd | 626 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 627 | break; |
23289a37 | 628 | unregister_vlan_dev(dev, NULL); |
af301517 | 629 | err = 0; |
1da177e4 LT |
630 | break; |
631 | ||
1da177e4 | 632 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 633 | err = 0; |
9c153d38 KC |
634 | vlan_dev_get_realdev_name(dev, args.u.device2, |
635 | sizeof(args.u.device2)); | |
1da177e4 | 636 | if (copy_to_user(arg, &args, |
2029cc2c | 637 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 638 | err = -EFAULT; |
1da177e4 LT |
639 | break; |
640 | ||
641 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 642 | err = 0; |
22d1ba74 | 643 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 644 | if (copy_to_user(arg, &args, |
2029cc2c | 645 | sizeof(struct vlan_ioctl_args))) |
122952fc | 646 | err = -EFAULT; |
1da177e4 LT |
647 | break; |
648 | ||
649 | default: | |
198a291c | 650 | err = -EOPNOTSUPP; |
c17d8874 | 651 | break; |
3ff50b79 | 652 | } |
7eb1b3d3 | 653 | out: |
c17d8874 | 654 | rtnl_unlock(); |
1da177e4 LT |
655 | return err; |
656 | } | |
657 | ||
2c8c1e72 | 658 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 659 | { |
946d1a92 | 660 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 661 | int err; |
d9ed0f0e | 662 | |
7a17a2f7 PE |
663 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
664 | ||
cd1c7014 | 665 | err = vlan_proc_init(net); |
cd1c7014 | 666 | |
d9ed0f0e PE |
667 | return err; |
668 | } | |
669 | ||
2c8c1e72 | 670 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 671 | { |
cd1c7014 | 672 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
673 | } |
674 | ||
675 | static struct pernet_operations vlan_net_ops = { | |
676 | .init = vlan_init_net, | |
677 | .exit = vlan_exit_net, | |
946d1a92 EB |
678 | .id = &vlan_net_id, |
679 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
680 | }; |
681 | ||
69ab4b7d PM |
682 | static int __init vlan_proto_init(void) |
683 | { | |
684 | int err; | |
685 | ||
da7c06c4 | 686 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 687 | |
91e2ff35 | 688 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
689 | if (err < 0) |
690 | goto err0; | |
691 | ||
69ab4b7d PM |
692 | err = register_netdevice_notifier(&vlan_notifier_block); |
693 | if (err < 0) | |
694 | goto err2; | |
695 | ||
70c03b49 | 696 | err = vlan_gvrp_init(); |
69ab4b7d PM |
697 | if (err < 0) |
698 | goto err3; | |
699 | ||
86fbe9bb | 700 | err = vlan_mvrp_init(); |
70c03b49 PM |
701 | if (err < 0) |
702 | goto err4; | |
703 | ||
86fbe9bb DW |
704 | err = vlan_netlink_init(); |
705 | if (err < 0) | |
706 | goto err5; | |
707 | ||
69ab4b7d PM |
708 | vlan_ioctl_set(vlan_ioctl_handler); |
709 | return 0; | |
710 | ||
86fbe9bb DW |
711 | err5: |
712 | vlan_mvrp_uninit(); | |
70c03b49 PM |
713 | err4: |
714 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
715 | err3: |
716 | unregister_netdevice_notifier(&vlan_notifier_block); | |
717 | err2: | |
91e2ff35 | 718 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 719 | err0: |
69ab4b7d PM |
720 | return err; |
721 | } | |
722 | ||
723 | static void __exit vlan_cleanup_module(void) | |
724 | { | |
69ab4b7d | 725 | vlan_ioctl_set(NULL); |
66e5133f | 726 | |
69ab4b7d PM |
727 | vlan_netlink_fini(); |
728 | ||
729 | unregister_netdevice_notifier(&vlan_notifier_block); | |
730 | ||
91e2ff35 | 731 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 732 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 733 | |
86fbe9bb | 734 | vlan_mvrp_uninit(); |
70c03b49 | 735 | vlan_gvrp_uninit(); |
69ab4b7d PM |
736 | } |
737 | ||
738 | module_init(vlan_proto_init); | |
739 | module_exit(vlan_cleanup_module); | |
740 | ||
1da177e4 LT |
741 | MODULE_LICENSE("GPL"); |
742 | MODULE_VERSION(DRV_VERSION); |