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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; | |
1fd9b1fc | 54 | unsigned int pidx, vidx; |
67727184 PE |
55 | unsigned int size; |
56 | ||
57 | ASSERT_RTNL(); | |
58 | ||
1fd9b1fc PM |
59 | pidx = vlan_proto_idx(vlan_proto); |
60 | vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; | |
61 | array = vg->vlan_devices_arrays[pidx][vidx]; | |
67727184 PE |
62 | if (array != NULL) |
63 | return 0; | |
64 | ||
65 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
66 | array = kzalloc(size, GFP_KERNEL); | |
67 | if (array == NULL) | |
68 | return -ENOBUFS; | |
69 | ||
1fd9b1fc | 70 | vg->vlan_devices_arrays[pidx][vidx] = array; |
67727184 | 71 | return 0; |
42429aae PM |
72 | } |
73 | ||
76052d8c MM |
74 | static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, |
75 | struct net_device *dev, | |
76 | struct vlan_dev_priv *vlan) | |
77 | { | |
78 | if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) | |
79 | netif_stacked_transfer_operstate(rootdev, dev); | |
80 | } | |
81 | ||
23289a37 | 82 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 83 | { |
7da82c06 | 84 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
af301517 | 85 | struct net_device *real_dev = vlan->real_dev; |
5b9ea6e0 | 86 | struct vlan_info *vlan_info; |
1da177e4 | 87 | struct vlan_group *grp; |
9bb8582e | 88 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
89 | |
90 | ASSERT_RTNL(); | |
acc5efbc | 91 | |
5b9ea6e0 JP |
92 | vlan_info = rtnl_dereference(real_dev->vlan_info); |
93 | BUG_ON(!vlan_info); | |
94 | ||
95 | grp = &vlan_info->grp; | |
acc5efbc | 96 | |
5b9ea6e0 | 97 | grp->nr_vlan_devs--; |
acc5efbc | 98 | |
86fbe9bb DW |
99 | if (vlan->flags & VLAN_FLAG_MVRP) |
100 | vlan_mvrp_request_leave(dev); | |
55aee10d ED |
101 | if (vlan->flags & VLAN_FLAG_GVRP) |
102 | vlan_gvrp_request_leave(dev); | |
103 | ||
1fd9b1fc | 104 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); |
47701a36 VF |
105 | |
106 | netdev_upper_dev_unlink(real_dev, dev); | |
48752e1b ED |
107 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
108 | * grace period is respected before device freeing, | |
109 | * we dont need to call synchronize_net() here. | |
110 | */ | |
23289a37 | 111 | unregister_netdevice_queue(dev, head); |
ce305002 | 112 | |
86fbe9bb DW |
113 | if (grp->nr_vlan_devs == 0) { |
114 | vlan_mvrp_uninit_applicant(real_dev); | |
70c03b49 | 115 | vlan_gvrp_uninit_applicant(real_dev); |
86fbe9bb | 116 | } |
70c03b49 | 117 | |
78bbb15f | 118 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
4a7df340 | 119 | |
af301517 PM |
120 | /* Get rid of the vlan's reference to real_dev */ |
121 | dev_put(real_dev); | |
1da177e4 LT |
122 | } |
123 | ||
1fd9b1fc | 124 | int vlan_check_real_dev(struct net_device *real_dev, |
33fa3823 DA |
125 | __be16 protocol, u16 vlan_id, |
126 | struct netlink_ext_ack *extack) | |
1da177e4 | 127 | { |
656299f7 | 128 | const char *name = real_dev->name; |
40f98e1a | 129 | |
1da177e4 | 130 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 131 | pr_info("VLANs not supported on %s\n", name); |
33fa3823 | 132 | NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); |
c1d3ee99 | 133 | return -EOPNOTSUPP; |
1da177e4 LT |
134 | } |
135 | ||
33fa3823 DA |
136 | if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { |
137 | NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); | |
c1d3ee99 | 138 | return -EEXIST; |
33fa3823 | 139 | } |
1da177e4 | 140 | |
c1d3ee99 PM |
141 | return 0; |
142 | } | |
143 | ||
42ab19ee | 144 | int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) |
e89fe42c | 145 | { |
7da82c06 | 146 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 147 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 148 | u16 vlan_id = vlan->vlan_id; |
5b9ea6e0 JP |
149 | struct vlan_info *vlan_info; |
150 | struct vlan_group *grp; | |
e89fe42c PM |
151 | int err; |
152 | ||
1fd9b1fc | 153 | err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); |
5b9ea6e0 JP |
154 | if (err) |
155 | return err; | |
156 | ||
157 | vlan_info = rtnl_dereference(real_dev->vlan_info); | |
158 | /* vlan_info should be there now. vlan_vid_add took care of it */ | |
159 | BUG_ON(!vlan_info); | |
160 | ||
161 | grp = &vlan_info->grp; | |
162 | if (grp->nr_vlan_devs == 0) { | |
70c03b49 PM |
163 | err = vlan_gvrp_init_applicant(real_dev); |
164 | if (err < 0) | |
5b9ea6e0 | 165 | goto out_vid_del; |
86fbe9bb DW |
166 | err = vlan_mvrp_init_applicant(real_dev); |
167 | if (err < 0) | |
168 | goto out_uninit_gvrp; | |
e89fe42c PM |
169 | } |
170 | ||
1fd9b1fc | 171 | err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); |
67727184 | 172 | if (err < 0) |
86fbe9bb | 173 | goto out_uninit_mvrp; |
67727184 | 174 | |
e89fe42c PM |
175 | err = register_netdevice(dev); |
176 | if (err < 0) | |
5df27e6c VF |
177 | goto out_uninit_mvrp; |
178 | ||
42ab19ee | 179 | err = netdev_upper_dev_link(real_dev, dev, extack); |
5df27e6c VF |
180 | if (err) |
181 | goto out_unregister_netdev; | |
e89fe42c | 182 | |
7da82c06 | 183 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
184 | dev_hold(real_dev); |
185 | ||
76052d8c | 186 | vlan_stacked_transfer_operstate(real_dev, dev, vlan); |
e89fe42c PM |
187 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
188 | ||
189 | /* So, got the sucker initialized, now lets place | |
190 | * it into our local structure. | |
191 | */ | |
1fd9b1fc | 192 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
5b9ea6e0 | 193 | grp->nr_vlan_devs++; |
e89fe42c | 194 | |
e89fe42c PM |
195 | return 0; |
196 | ||
5df27e6c VF |
197 | out_unregister_netdev: |
198 | unregister_netdevice(dev); | |
86fbe9bb DW |
199 | out_uninit_mvrp: |
200 | if (grp->nr_vlan_devs == 0) | |
201 | vlan_mvrp_uninit_applicant(real_dev); | |
202 | out_uninit_gvrp: | |
5b9ea6e0 | 203 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 204 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 | 205 | out_vid_del: |
1fd9b1fc | 206 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
e89fe42c PM |
207 | return err; |
208 | } | |
209 | ||
c1d3ee99 | 210 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 211 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 212 | */ |
9bb8582e | 213 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 214 | { |
c1d3ee99 | 215 | struct net_device *new_dev; |
0c0667a8 | 216 | struct vlan_dev_priv *vlan; |
7a17a2f7 PE |
217 | struct net *net = dev_net(real_dev); |
218 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 219 | char name[IFNAMSIZ]; |
2ae0bf69 | 220 | int err; |
c1d3ee99 | 221 | |
9bb8582e | 222 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 223 | return -ERANGE; |
c1d3ee99 | 224 | |
33fa3823 DA |
225 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, |
226 | NULL); | |
2ae0bf69 PM |
227 | if (err < 0) |
228 | return err; | |
c1d3ee99 | 229 | |
1da177e4 | 230 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 231 | switch (vn->name_type) { |
1da177e4 LT |
232 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
233 | /* name will look like: eth1.0005 */ | |
9bb8582e | 234 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
235 | break; |
236 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
237 | /* Put our vlan.VID in the name. | |
238 | * Name will look like: vlan5 | |
239 | */ | |
9bb8582e | 240 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
241 | break; |
242 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
243 | /* Put our vlan.VID in the name. | |
244 | * Name will look like: eth0.5 | |
245 | */ | |
9bb8582e | 246 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
247 | break; |
248 | case VLAN_NAME_TYPE_PLUS_VID: | |
249 | /* Put our vlan.VID in the name. | |
250 | * Name will look like: vlan0005 | |
251 | */ | |
252 | default: | |
9bb8582e | 253 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 254 | } |
122952fc | 255 | |
c835a677 TG |
256 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, |
257 | NET_NAME_UNKNOWN, vlan_setup); | |
5dd8d1e9 | 258 | |
1da177e4 | 259 | if (new_dev == NULL) |
2ae0bf69 | 260 | return -ENOBUFS; |
1da177e4 | 261 | |
65d292a2 | 262 | dev_net_set(new_dev, net); |
1da177e4 LT |
263 | /* need 4 bytes for extra VLAN header info, |
264 | * hope the underlying device can handle it. | |
265 | */ | |
266 | new_dev->mtu = real_dev->mtu; | |
267 | ||
0c0667a8 WSH |
268 | vlan = vlan_dev_priv(new_dev); |
269 | vlan->vlan_proto = htons(ETH_P_8021Q); | |
270 | vlan->vlan_id = vlan_id; | |
271 | vlan->real_dev = real_dev; | |
272 | vlan->dent = NULL; | |
273 | vlan->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 274 | |
07b5b17e | 275 | new_dev->rtnl_link_ops = &vlan_link_ops; |
42ab19ee | 276 | err = register_vlan_dev(new_dev, NULL); |
2ae0bf69 | 277 | if (err < 0) |
e89fe42c | 278 | goto out_free_newdev; |
1da177e4 | 279 | |
2ae0bf69 | 280 | return 0; |
1da177e4 | 281 | |
1da177e4 | 282 | out_free_newdev: |
9745e362 GF |
283 | if (new_dev->reg_state == NETREG_UNINITIALIZED) |
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 | ||
1ae4be22 | 322 | vlandev->gso_max_size = dev->gso_max_size; |
f6773c5e | 323 | vlandev->gso_max_segs = dev->gso_max_segs; |
029f5fc3 | 324 | |
fc0d48b8 | 325 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
326 | vlandev->hard_header_len = dev->hard_header_len; |
327 | else | |
328 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
329 | ||
f4d5392e | 330 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
331 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
332 | #endif | |
8a0427bb | 333 | |
9d917c20 VF |
334 | vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
335 | vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); | |
7dad9937 | 336 | vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); |
9d917c20 | 337 | |
8a0427bb | 338 | netdev_update_features(vlandev); |
5fb13570 PM |
339 | } |
340 | ||
9c5ff24f | 341 | static int __vlan_device_event(struct net_device *dev, unsigned long event) |
802fb176 | 342 | { |
9c5ff24f WC |
343 | int err = 0; |
344 | ||
802fb176 PE |
345 | switch (event) { |
346 | case NETDEV_CHANGENAME: | |
347 | vlan_proc_rem_dev(dev); | |
9c5ff24f | 348 | err = vlan_proc_add_dev(dev); |
802fb176 | 349 | break; |
30688a9a | 350 | case NETDEV_REGISTER: |
9c5ff24f | 351 | err = vlan_proc_add_dev(dev); |
30688a9a PE |
352 | break; |
353 | case NETDEV_UNREGISTER: | |
354 | vlan_proc_rem_dev(dev); | |
355 | break; | |
802fb176 | 356 | } |
9c5ff24f WC |
357 | |
358 | return err; | |
802fb176 PE |
359 | } |
360 | ||
2029cc2c PM |
361 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
362 | void *ptr) | |
1da177e4 | 363 | { |
567c5e13 | 364 | struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); |
351638e7 | 365 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 366 | struct vlan_group *grp; |
5b9ea6e0 | 367 | struct vlan_info *vlan_info; |
1da177e4 LT |
368 | int i, flgs; |
369 | struct net_device *vlandev; | |
7da82c06 | 370 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 371 | bool last = false; |
29906f6a | 372 | LIST_HEAD(list); |
9daae9bd | 373 | int err; |
1da177e4 | 374 | |
9c5ff24f WC |
375 | if (is_vlan_dev(dev)) { |
376 | int err = __vlan_device_event(dev, event); | |
377 | ||
378 | if (err) | |
379 | return notifier_from_errno(err); | |
380 | } | |
802fb176 | 381 | |
ad1afb00 | 382 | if ((event == NETDEV_UP) && |
f646968f | 383 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 384 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 385 | dev->name); |
80d5c368 | 386 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 | 387 | } |
052d41c0 CW |
388 | if (event == NETDEV_DOWN && |
389 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) | |
390 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); | |
ad1afb00 | 391 | |
5b9ea6e0 JP |
392 | vlan_info = rtnl_dereference(dev->vlan_info); |
393 | if (!vlan_info) | |
1da177e4 | 394 | goto out; |
5b9ea6e0 | 395 | grp = &vlan_info->grp; |
1da177e4 LT |
396 | |
397 | /* It is OK that we do not hold the group lock right now, | |
398 | * as we run under the RTNL lock. | |
399 | */ | |
400 | ||
401 | switch (event) { | |
402 | case NETDEV_CHANGE: | |
403 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 404 | vlan_group_for_each_dev(grp, i, vlandev) |
76052d8c MM |
405 | vlan_stacked_transfer_operstate(dev, vlandev, |
406 | vlan_dev_priv(vlandev)); | |
1da177e4 LT |
407 | break; |
408 | ||
8c979c26 PM |
409 | case NETDEV_CHANGEADDR: |
410 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 411 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
412 | flgs = vlandev->flags; |
413 | if (!(flgs & IFF_UP)) | |
414 | continue; | |
415 | ||
8c979c26 PM |
416 | vlan_sync_address(dev, vlandev); |
417 | } | |
2e477c9b HX |
418 | break; |
419 | ||
420 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 421 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
422 | if (vlandev->mtu <= dev->mtu) |
423 | continue; | |
424 | ||
425 | dev_set_mtu(vlandev, dev->mtu); | |
426 | } | |
8c979c26 PM |
427 | break; |
428 | ||
5fb13570 PM |
429 | case NETDEV_FEAT_CHANGE: |
430 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 431 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 432 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
433 | break; |
434 | ||
99c4a26a DM |
435 | case NETDEV_DOWN: { |
436 | struct net_device *tmp; | |
437 | LIST_HEAD(close_list); | |
438 | ||
1da177e4 | 439 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 440 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
441 | flgs = vlandev->flags; |
442 | if (!(flgs & IFF_UP)) | |
443 | continue; | |
444 | ||
7da82c06 | 445 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 446 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
99c4a26a DM |
447 | list_add(&vlandev->close_list, &close_list); |
448 | } | |
449 | ||
450 | dev_close_many(&close_list, false); | |
451 | ||
452 | list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { | |
76052d8c MM |
453 | vlan_stacked_transfer_operstate(dev, vlandev, |
454 | vlan_dev_priv(vlandev)); | |
99c4a26a | 455 | list_del_init(&vlandev->close_list); |
1da177e4 | 456 | } |
99c4a26a | 457 | list_del(&close_list); |
1da177e4 | 458 | break; |
99c4a26a | 459 | } |
1da177e4 LT |
460 | case NETDEV_UP: |
461 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 462 | vlan_group_for_each_dev(grp, i, vlandev) { |
be346ffa | 463 | flgs = dev_get_flags(vlandev); |
1da177e4 LT |
464 | if (flgs & IFF_UP) |
465 | continue; | |
466 | ||
7da82c06 | 467 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 468 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
567c5e13 PM |
469 | dev_change_flags(vlandev, flgs | IFF_UP, |
470 | extack); | |
76052d8c | 471 | vlan_stacked_transfer_operstate(dev, vlandev, vlan); |
1da177e4 LT |
472 | } |
473 | break; | |
122952fc | 474 | |
1da177e4 | 475 | case NETDEV_UNREGISTER: |
3b27e105 DL |
476 | /* twiddle thumbs on netns device moves */ |
477 | if (dev->reg_state != NETREG_UNREGISTERING) | |
478 | break; | |
479 | ||
1fd9b1fc | 480 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 481 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 482 | * afterwards */ |
5b9ea6e0 | 483 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 484 | last = true; |
29906f6a PM |
485 | |
486 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
487 | if (last) |
488 | break; | |
29906f6a PM |
489 | } |
490 | unregister_netdevice_many(&list); | |
1da177e4 | 491 | break; |
1c01fe14 JP |
492 | |
493 | case NETDEV_PRE_TYPE_CHANGE: | |
494 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
495 | if (vlan_uses_dev(dev)) |
496 | return NOTIFY_BAD; | |
497 | break; | |
99606477 BH |
498 | |
499 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 500 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 501 | case NETDEV_RESEND_IGMP: |
99606477 | 502 | /* Propagate to vlan devices */ |
1fd9b1fc | 503 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 504 | call_netdevice_notifiers(event, vlandev); |
99606477 | 505 | break; |
9daae9bd GP |
506 | |
507 | case NETDEV_CVLAN_FILTER_PUSH_INFO: | |
508 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); | |
509 | if (err) | |
510 | return notifier_from_errno(err); | |
511 | break; | |
512 | ||
513 | case NETDEV_CVLAN_FILTER_DROP_INFO: | |
514 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); | |
515 | break; | |
516 | ||
517 | case NETDEV_SVLAN_FILTER_PUSH_INFO: | |
518 | err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); | |
519 | if (err) | |
520 | return notifier_from_errno(err); | |
521 | break; | |
522 | ||
523 | case NETDEV_SVLAN_FILTER_DROP_INFO: | |
524 | vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); | |
525 | break; | |
3ff50b79 | 526 | } |
1da177e4 LT |
527 | |
528 | out: | |
529 | return NOTIFY_DONE; | |
530 | } | |
531 | ||
69ab4b7d PM |
532 | static struct notifier_block vlan_notifier_block __read_mostly = { |
533 | .notifier_call = vlan_device_event, | |
534 | }; | |
535 | ||
1da177e4 LT |
536 | /* |
537 | * VLAN IOCTL handler. | |
538 | * o execute requested action or pass command to the device driver | |
539 | * arg is really a struct vlan_ioctl_args __user *. | |
540 | */ | |
881d966b | 541 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 542 | { |
c17d8874 | 543 | int err; |
1da177e4 | 544 | struct vlan_ioctl_args args; |
c17d8874 | 545 | struct net_device *dev = NULL; |
1da177e4 LT |
546 | |
547 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
548 | return -EFAULT; | |
549 | ||
550 | /* Null terminate this sucker, just in case. */ | |
9c403b6b GF |
551 | args.device1[sizeof(args.device1) - 1] = 0; |
552 | args.u.device2[sizeof(args.u.device2) - 1] = 0; | |
1da177e4 | 553 | |
c17d8874 PM |
554 | rtnl_lock(); |
555 | ||
1da177e4 LT |
556 | switch (args.cmd) { |
557 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
558 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
559 | case SET_VLAN_FLAG_CMD: | |
560 | case ADD_VLAN_CMD: | |
561 | case DEL_VLAN_CMD: | |
562 | case GET_VLAN_REALDEV_NAME_CMD: | |
563 | case GET_VLAN_VID_CMD: | |
564 | err = -ENODEV; | |
65d292a2 | 565 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
566 | if (!dev) |
567 | goto out; | |
568 | ||
569 | err = -EINVAL; | |
26a25239 | 570 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
571 | goto out; |
572 | } | |
573 | ||
574 | switch (args.cmd) { | |
575 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
576 | err = -EPERM; | |
276996fd | 577 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
578 | break; |
579 | vlan_dev_set_ingress_priority(dev, | |
580 | args.u.skb_priority, | |
581 | args.vlan_qos); | |
fffe470a | 582 | err = 0; |
1da177e4 LT |
583 | break; |
584 | ||
585 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 586 | err = -EPERM; |
276996fd | 587 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
588 | break; |
589 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
590 | args.u.skb_priority, |
591 | args.vlan_qos); | |
592 | break; | |
593 | ||
594 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 595 | err = -EPERM; |
276996fd | 596 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 597 | break; |
b3ce0325 PM |
598 | err = vlan_dev_change_flags(dev, |
599 | args.vlan_qos ? args.u.flag : 0, | |
600 | args.u.flag); | |
1da177e4 LT |
601 | break; |
602 | ||
603 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 604 | err = -EPERM; |
276996fd | 605 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 606 | break; |
403f0727 | 607 | if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { |
7a17a2f7 PE |
608 | struct vlan_net *vn; |
609 | ||
610 | vn = net_generic(net, vlan_net_id); | |
611 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
612 | err = 0; |
613 | } else { | |
614 | err = -EINVAL; | |
615 | } | |
616 | break; | |
617 | ||
618 | case ADD_VLAN_CMD: | |
c17d8874 | 619 | err = -EPERM; |
276996fd | 620 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 621 | break; |
2ae0bf69 | 622 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
623 | break; |
624 | ||
625 | case DEL_VLAN_CMD: | |
c17d8874 | 626 | err = -EPERM; |
276996fd | 627 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 628 | break; |
23289a37 | 629 | unregister_vlan_dev(dev, NULL); |
af301517 | 630 | err = 0; |
1da177e4 LT |
631 | break; |
632 | ||
1da177e4 | 633 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 634 | err = 0; |
c17d8874 | 635 | vlan_dev_get_realdev_name(dev, 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); |