Commit | Line | Data |
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7750f403 PM |
1 | #include <linux/skbuff.h> |
2 | #include <linux/netdevice.h> | |
3 | #include <linux/if_vlan.h> | |
4ead4431 | 4 | #include <linux/netpoll.h> |
bc3b2d7f | 5 | #include <linux/export.h> |
7750f403 PM |
6 | #include "vlan.h" |
7 | ||
48cc32d3 | 8 | bool vlan_do_receive(struct sk_buff **skbp) |
7750f403 | 9 | { |
3701e513 | 10 | struct sk_buff *skb = *skbp; |
86a9bad3 | 11 | __be16 vlan_proto = skb->vlan_proto; |
df8a39de | 12 | u16 vlan_id = skb_vlan_tag_get_id(skb); |
ad1afb00 | 13 | struct net_device *vlan_dev; |
4af429d2 | 14 | struct vlan_pcpu_stats *rx_stats; |
7750f403 | 15 | |
86a9bad3 | 16 | vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); |
48cc32d3 | 17 | if (!vlan_dev) |
3701e513 | 18 | return false; |
9b22ea56 | 19 | |
3701e513 JG |
20 | skb = *skbp = skb_share_check(skb, GFP_ATOMIC); |
21 | if (unlikely(!skb)) | |
22 | return false; | |
e1c096e2 | 23 | |
3701e513 | 24 | skb->dev = vlan_dev; |
375f67df | 25 | if (unlikely(skb->pkt_type == PACKET_OTHERHOST)) { |
0b5c9db1 JP |
26 | /* Our lower layer thinks this is not local, let's make sure. |
27 | * This allows the VLAN to have a different MAC than the | |
28 | * underlying device, and still route correctly. */ | |
be14cc98 | 29 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, vlan_dev->dev_addr)) |
0b5c9db1 JP |
30 | skb->pkt_type = PACKET_HOST; |
31 | } | |
32 | ||
28f9ee22 VY |
33 | if (!(vlan_dev_priv(vlan_dev)->flags & VLAN_FLAG_REORDER_HDR) && |
34 | !netif_is_macvlan_port(vlan_dev) && | |
35 | !netif_is_bridge_port(vlan_dev)) { | |
0b5c9db1 JP |
36 | unsigned int offset = skb->data - skb_mac_header(skb); |
37 | ||
38 | /* | |
39 | * vlan_insert_tag expect skb->data pointing to mac header. | |
40 | * So change skb->data before calling it and change back to | |
41 | * original position later | |
42 | */ | |
43 | skb_push(skb, offset); | |
86a9bad3 PM |
44 | skb = *skbp = vlan_insert_tag(skb, skb->vlan_proto, |
45 | skb->vlan_tci); | |
0b5c9db1 JP |
46 | if (!skb) |
47 | return false; | |
48 | skb_pull(skb, offset + VLAN_HLEN); | |
49 | skb_reset_mac_len(skb); | |
50 | } | |
51 | ||
3701e513 | 52 | skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci); |
bc1d0411 | 53 | skb->vlan_tci = 0; |
7750f403 | 54 | |
7da82c06 | 55 | rx_stats = this_cpu_ptr(vlan_dev_priv(vlan_dev)->vlan_pcpu_stats); |
9793241f | 56 | |
9618e2ff | 57 | u64_stats_update_begin(&rx_stats->syncp); |
9793241f ED |
58 | rx_stats->rx_packets++; |
59 | rx_stats->rx_bytes += skb->len; | |
0b5c9db1 | 60 | if (skb->pkt_type == PACKET_MULTICAST) |
9618e2ff | 61 | rx_stats->rx_multicast++; |
9618e2ff | 62 | u64_stats_update_end(&rx_stats->syncp); |
3701e513 JG |
63 | |
64 | return true; | |
7750f403 | 65 | } |
22d1ba74 | 66 | |
1cdfd72f | 67 | /* Must be invoked with rcu_read_lock. */ |
f06c7f9f | 68 | struct net_device *__vlan_find_dev_deep_rcu(struct net_device *dev, |
1fd9b1fc | 69 | __be16 vlan_proto, u16 vlan_id) |
cec9c133 | 70 | { |
1cdfd72f | 71 | struct vlan_info *vlan_info = rcu_dereference(dev->vlan_info); |
cec9c133 | 72 | |
5b9ea6e0 | 73 | if (vlan_info) { |
1fd9b1fc PM |
74 | return vlan_group_get_device(&vlan_info->grp, |
75 | vlan_proto, vlan_id); | |
cec9c133 JP |
76 | } else { |
77 | /* | |
1cdfd72f JP |
78 | * Lower devices of master uppers (bonding, team) do not have |
79 | * grp assigned to themselves. Grp is assigned to upper device | |
80 | * instead. | |
cec9c133 | 81 | */ |
1cdfd72f JP |
82 | struct net_device *upper_dev; |
83 | ||
84 | upper_dev = netdev_master_upper_dev_get_rcu(dev); | |
85 | if (upper_dev) | |
f06c7f9f | 86 | return __vlan_find_dev_deep_rcu(upper_dev, |
1fd9b1fc | 87 | vlan_proto, vlan_id); |
cec9c133 JP |
88 | } |
89 | ||
90 | return NULL; | |
91 | } | |
f06c7f9f | 92 | EXPORT_SYMBOL(__vlan_find_dev_deep_rcu); |
cec9c133 | 93 | |
22d1ba74 PM |
94 | struct net_device *vlan_dev_real_dev(const struct net_device *dev) |
95 | { | |
0369722f | 96 | struct net_device *ret = vlan_dev_priv(dev)->real_dev; |
97 | ||
98 | while (is_vlan_dev(ret)) | |
99 | ret = vlan_dev_priv(ret)->real_dev; | |
100 | ||
101 | return ret; | |
22d1ba74 | 102 | } |
116cb428 | 103 | EXPORT_SYMBOL(vlan_dev_real_dev); |
22d1ba74 PM |
104 | |
105 | u16 vlan_dev_vlan_id(const struct net_device *dev) | |
106 | { | |
7da82c06 | 107 | return vlan_dev_priv(dev)->vlan_id; |
22d1ba74 | 108 | } |
116cb428 | 109 | EXPORT_SYMBOL(vlan_dev_vlan_id); |
e1c096e2 | 110 | |
71e415e4 | 111 | __be16 vlan_dev_vlan_proto(const struct net_device *dev) |
112 | { | |
113 | return vlan_dev_priv(dev)->vlan_proto; | |
114 | } | |
115 | EXPORT_SYMBOL(vlan_dev_vlan_proto); | |
116 | ||
5b9ea6e0 JP |
117 | /* |
118 | * vlan info and vid list | |
119 | */ | |
120 | ||
121 | static void vlan_group_free(struct vlan_group *grp) | |
122 | { | |
cf2c014a | 123 | int i, j; |
5b9ea6e0 | 124 | |
cf2c014a PM |
125 | for (i = 0; i < VLAN_PROTO_NUM; i++) |
126 | for (j = 0; j < VLAN_GROUP_ARRAY_SPLIT_PARTS; j++) | |
127 | kfree(grp->vlan_devices_arrays[i][j]); | |
5b9ea6e0 JP |
128 | } |
129 | ||
130 | static void vlan_info_free(struct vlan_info *vlan_info) | |
131 | { | |
132 | vlan_group_free(&vlan_info->grp); | |
133 | kfree(vlan_info); | |
134 | } | |
135 | ||
136 | static void vlan_info_rcu_free(struct rcu_head *rcu) | |
137 | { | |
138 | vlan_info_free(container_of(rcu, struct vlan_info, rcu)); | |
139 | } | |
140 | ||
141 | static struct vlan_info *vlan_info_alloc(struct net_device *dev) | |
142 | { | |
143 | struct vlan_info *vlan_info; | |
144 | ||
145 | vlan_info = kzalloc(sizeof(struct vlan_info), GFP_KERNEL); | |
146 | if (!vlan_info) | |
147 | return NULL; | |
148 | ||
149 | vlan_info->real_dev = dev; | |
150 | INIT_LIST_HEAD(&vlan_info->vid_list); | |
151 | return vlan_info; | |
152 | } | |
153 | ||
154 | struct vlan_vid_info { | |
155 | struct list_head list; | |
80d5c368 PM |
156 | __be16 proto; |
157 | u16 vid; | |
5b9ea6e0 JP |
158 | int refcount; |
159 | }; | |
160 | ||
8ad227ff PM |
161 | static bool vlan_hw_filter_capable(const struct net_device *dev, |
162 | const struct vlan_vid_info *vid_info) | |
163 | { | |
164 | if (vid_info->proto == htons(ETH_P_8021Q) && | |
165 | dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) | |
166 | return true; | |
167 | if (vid_info->proto == htons(ETH_P_8021AD) && | |
168 | dev->features & NETIF_F_HW_VLAN_STAG_FILTER) | |
169 | return true; | |
170 | return false; | |
171 | } | |
172 | ||
5b9ea6e0 | 173 | static struct vlan_vid_info *vlan_vid_info_get(struct vlan_info *vlan_info, |
80d5c368 | 174 | __be16 proto, u16 vid) |
5b9ea6e0 JP |
175 | { |
176 | struct vlan_vid_info *vid_info; | |
177 | ||
178 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { | |
80d5c368 | 179 | if (vid_info->proto == proto && vid_info->vid == vid) |
5b9ea6e0 JP |
180 | return vid_info; |
181 | } | |
182 | return NULL; | |
183 | } | |
184 | ||
80d5c368 | 185 | static struct vlan_vid_info *vlan_vid_info_alloc(__be16 proto, u16 vid) |
5b9ea6e0 JP |
186 | { |
187 | struct vlan_vid_info *vid_info; | |
188 | ||
189 | vid_info = kzalloc(sizeof(struct vlan_vid_info), GFP_KERNEL); | |
190 | if (!vid_info) | |
191 | return NULL; | |
80d5c368 | 192 | vid_info->proto = proto; |
5b9ea6e0 JP |
193 | vid_info->vid = vid; |
194 | ||
195 | return vid_info; | |
196 | } | |
197 | ||
80d5c368 | 198 | static int __vlan_vid_add(struct vlan_info *vlan_info, __be16 proto, u16 vid, |
5b9ea6e0 | 199 | struct vlan_vid_info **pvid_info) |
87002b03 | 200 | { |
5b9ea6e0 | 201 | struct net_device *dev = vlan_info->real_dev; |
87002b03 | 202 | const struct net_device_ops *ops = dev->netdev_ops; |
5b9ea6e0 JP |
203 | struct vlan_vid_info *vid_info; |
204 | int err; | |
205 | ||
80d5c368 | 206 | vid_info = vlan_vid_info_alloc(proto, vid); |
5b9ea6e0 JP |
207 | if (!vid_info) |
208 | return -ENOMEM; | |
87002b03 | 209 | |
8ad227ff | 210 | if (vlan_hw_filter_capable(dev, vid_info)) { |
74f2d19c PR |
211 | if (netif_device_present(dev)) |
212 | err = ops->ndo_vlan_rx_add_vid(dev, proto, vid); | |
213 | else | |
214 | err = -ENODEV; | |
5b9ea6e0 JP |
215 | if (err) { |
216 | kfree(vid_info); | |
217 | return err; | |
218 | } | |
87002b03 | 219 | } |
5b9ea6e0 JP |
220 | list_add(&vid_info->list, &vlan_info->vid_list); |
221 | vlan_info->nr_vids++; | |
222 | *pvid_info = vid_info; | |
87002b03 JP |
223 | return 0; |
224 | } | |
5b9ea6e0 | 225 | |
80d5c368 | 226 | int vlan_vid_add(struct net_device *dev, __be16 proto, u16 vid) |
5b9ea6e0 JP |
227 | { |
228 | struct vlan_info *vlan_info; | |
229 | struct vlan_vid_info *vid_info; | |
230 | bool vlan_info_created = false; | |
231 | int err; | |
232 | ||
233 | ASSERT_RTNL(); | |
234 | ||
235 | vlan_info = rtnl_dereference(dev->vlan_info); | |
236 | if (!vlan_info) { | |
237 | vlan_info = vlan_info_alloc(dev); | |
238 | if (!vlan_info) | |
239 | return -ENOMEM; | |
240 | vlan_info_created = true; | |
241 | } | |
80d5c368 | 242 | vid_info = vlan_vid_info_get(vlan_info, proto, vid); |
5b9ea6e0 | 243 | if (!vid_info) { |
80d5c368 | 244 | err = __vlan_vid_add(vlan_info, proto, vid, &vid_info); |
5b9ea6e0 JP |
245 | if (err) |
246 | goto out_free_vlan_info; | |
247 | } | |
248 | vid_info->refcount++; | |
249 | ||
250 | if (vlan_info_created) | |
251 | rcu_assign_pointer(dev->vlan_info, vlan_info); | |
252 | ||
253 | return 0; | |
254 | ||
255 | out_free_vlan_info: | |
256 | if (vlan_info_created) | |
257 | kfree(vlan_info); | |
258 | return err; | |
259 | } | |
87002b03 JP |
260 | EXPORT_SYMBOL(vlan_vid_add); |
261 | ||
5b9ea6e0 JP |
262 | static void __vlan_vid_del(struct vlan_info *vlan_info, |
263 | struct vlan_vid_info *vid_info) | |
87002b03 | 264 | { |
5b9ea6e0 | 265 | struct net_device *dev = vlan_info->real_dev; |
87002b03 | 266 | const struct net_device_ops *ops = dev->netdev_ops; |
80d5c368 PM |
267 | __be16 proto = vid_info->proto; |
268 | u16 vid = vid_info->vid; | |
5b9ea6e0 | 269 | int err; |
87002b03 | 270 | |
8ad227ff | 271 | if (vlan_hw_filter_capable(dev, vid_info)) { |
74f2d19c PR |
272 | if (netif_device_present(dev)) |
273 | err = ops->ndo_vlan_rx_kill_vid(dev, proto, vid); | |
274 | else | |
275 | err = -ENODEV; | |
5b9ea6e0 | 276 | if (err) { |
80d5c368 PM |
277 | pr_warn("failed to kill vid %04x/%d for device %s\n", |
278 | proto, vid, dev->name); | |
5b9ea6e0 JP |
279 | } |
280 | } | |
281 | list_del(&vid_info->list); | |
282 | kfree(vid_info); | |
283 | vlan_info->nr_vids--; | |
284 | } | |
285 | ||
80d5c368 | 286 | void vlan_vid_del(struct net_device *dev, __be16 proto, u16 vid) |
5b9ea6e0 JP |
287 | { |
288 | struct vlan_info *vlan_info; | |
289 | struct vlan_vid_info *vid_info; | |
290 | ||
291 | ASSERT_RTNL(); | |
292 | ||
293 | vlan_info = rtnl_dereference(dev->vlan_info); | |
294 | if (!vlan_info) | |
295 | return; | |
296 | ||
80d5c368 | 297 | vid_info = vlan_vid_info_get(vlan_info, proto, vid); |
5b9ea6e0 JP |
298 | if (!vid_info) |
299 | return; | |
300 | vid_info->refcount--; | |
301 | if (vid_info->refcount == 0) { | |
302 | __vlan_vid_del(vlan_info, vid_info); | |
303 | if (vlan_info->nr_vids == 0) { | |
304 | RCU_INIT_POINTER(dev->vlan_info, NULL); | |
305 | call_rcu(&vlan_info->rcu, vlan_info_rcu_free); | |
306 | } | |
87002b03 JP |
307 | } |
308 | } | |
309 | EXPORT_SYMBOL(vlan_vid_del); | |
348a1443 JP |
310 | |
311 | int vlan_vids_add_by_dev(struct net_device *dev, | |
312 | const struct net_device *by_dev) | |
313 | { | |
314 | struct vlan_vid_info *vid_info; | |
f9586f79 | 315 | struct vlan_info *vlan_info; |
348a1443 JP |
316 | int err; |
317 | ||
318 | ASSERT_RTNL(); | |
319 | ||
f9586f79 DC |
320 | vlan_info = rtnl_dereference(by_dev->vlan_info); |
321 | if (!vlan_info) | |
348a1443 JP |
322 | return 0; |
323 | ||
f9586f79 | 324 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { |
80d5c368 | 325 | err = vlan_vid_add(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
326 | if (err) |
327 | goto unwind; | |
328 | } | |
329 | return 0; | |
330 | ||
331 | unwind: | |
332 | list_for_each_entry_continue_reverse(vid_info, | |
f9586f79 | 333 | &vlan_info->vid_list, |
348a1443 | 334 | list) { |
80d5c368 | 335 | vlan_vid_del(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
336 | } |
337 | ||
338 | return err; | |
339 | } | |
340 | EXPORT_SYMBOL(vlan_vids_add_by_dev); | |
341 | ||
342 | void vlan_vids_del_by_dev(struct net_device *dev, | |
343 | const struct net_device *by_dev) | |
344 | { | |
345 | struct vlan_vid_info *vid_info; | |
f9586f79 | 346 | struct vlan_info *vlan_info; |
348a1443 JP |
347 | |
348 | ASSERT_RTNL(); | |
349 | ||
f9586f79 DC |
350 | vlan_info = rtnl_dereference(by_dev->vlan_info); |
351 | if (!vlan_info) | |
348a1443 JP |
352 | return; |
353 | ||
f9586f79 | 354 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) |
80d5c368 | 355 | vlan_vid_del(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
356 | } |
357 | EXPORT_SYMBOL(vlan_vids_del_by_dev); | |
9b361c13 JP |
358 | |
359 | bool vlan_uses_dev(const struct net_device *dev) | |
360 | { | |
55462cf3 JP |
361 | struct vlan_info *vlan_info; |
362 | ||
363 | ASSERT_RTNL(); | |
364 | ||
365 | vlan_info = rtnl_dereference(dev->vlan_info); | |
366 | if (!vlan_info) | |
367 | return false; | |
368 | return vlan_info->grp.nr_vlan_devs ? true : false; | |
9b361c13 JP |
369 | } |
370 | EXPORT_SYMBOL(vlan_uses_dev); |