Commit | Line | Data |
---|---|---|
243a2e63 VY |
1 | #include <linux/kernel.h> |
2 | #include <linux/netdevice.h> | |
3 | #include <linux/rtnetlink.h> | |
4 | #include <linux/slab.h> | |
7f109539 | 5 | #include <net/switchdev.h> |
243a2e63 VY |
6 | |
7 | #include "br_private.h" | |
8 | ||
2594e906 NA |
9 | static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg, |
10 | const void *ptr) | |
552406c4 | 11 | { |
2594e906 NA |
12 | const struct net_bridge_vlan *vle = ptr; |
13 | u16 vid = *(u16 *)arg->key; | |
14 | ||
15 | return vle->vid != vid; | |
16 | } | |
17 | ||
18 | static const struct rhashtable_params br_vlan_rht_params = { | |
19 | .head_offset = offsetof(struct net_bridge_vlan, vnode), | |
20 | .key_offset = offsetof(struct net_bridge_vlan, vid), | |
21 | .key_len = sizeof(u16), | |
8af78b64 NA |
22 | .nelem_hint = 3, |
23 | .locks_mul = 1, | |
2594e906 NA |
24 | .max_size = VLAN_N_VID, |
25 | .obj_cmpfn = br_vlan_cmp, | |
26 | .automatic_shrinking = true, | |
27 | }; | |
28 | ||
29 | static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid) | |
30 | { | |
31 | return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params); | |
32 | } | |
33 | ||
77751ee8 | 34 | static void __vlan_add_pvid(struct net_bridge_vlan_group *vg, u16 vid) |
2594e906 | 35 | { |
77751ee8 | 36 | if (vg->pvid == vid) |
552406c4 VY |
37 | return; |
38 | ||
39 | smp_wmb(); | |
77751ee8 | 40 | vg->pvid = vid; |
552406c4 VY |
41 | } |
42 | ||
77751ee8 | 43 | static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid) |
552406c4 | 44 | { |
77751ee8 | 45 | if (vg->pvid != vid) |
552406c4 VY |
46 | return; |
47 | ||
48 | smp_wmb(); | |
77751ee8 | 49 | vg->pvid = 0; |
552406c4 VY |
50 | } |
51 | ||
2594e906 | 52 | static void __vlan_add_flags(struct net_bridge_vlan *v, u16 flags) |
35e03f3a | 53 | { |
77751ee8 NA |
54 | struct net_bridge_vlan_group *vg; |
55 | ||
56 | if (br_vlan_is_master(v)) | |
907b1e6e | 57 | vg = br_vlan_group(v->br); |
77751ee8 | 58 | else |
907b1e6e | 59 | vg = nbp_vlan_group(v->port); |
77751ee8 NA |
60 | |
61 | if (flags & BRIDGE_VLAN_INFO_PVID) | |
62 | __vlan_add_pvid(vg, v->vid); | |
63 | else | |
64 | __vlan_delete_pvid(vg, v->vid); | |
35e03f3a VY |
65 | |
66 | if (flags & BRIDGE_VLAN_INFO_UNTAGGED) | |
2594e906 | 67 | v->flags |= BRIDGE_VLAN_INFO_UNTAGGED; |
635126b7 | 68 | else |
2594e906 | 69 | v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED; |
35e03f3a VY |
70 | } |
71 | ||
7f109539 SF |
72 | static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br, |
73 | u16 vid, u16 flags) | |
74 | { | |
0944d6b5 JP |
75 | struct switchdev_obj_port_vlan v = { |
76 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
77 | .flags = flags, | |
78 | .vid_begin = vid, | |
79 | .vid_end = vid, | |
80 | }; | |
7f109539 SF |
81 | int err; |
82 | ||
0944d6b5 JP |
83 | /* Try switchdev op first. In case it is not supported, fallback to |
84 | * 8021q add. | |
7f109539 | 85 | */ |
0944d6b5 JP |
86 | err = switchdev_port_obj_add(dev, &v.obj); |
87 | if (err == -EOPNOTSUPP) | |
88 | return vlan_vid_add(dev, br->vlan_proto, vid); | |
7f109539 SF |
89 | return err; |
90 | } | |
91 | ||
2594e906 | 92 | static void __vlan_add_list(struct net_bridge_vlan *v) |
243a2e63 | 93 | { |
907b1e6e | 94 | struct net_bridge_vlan_group *vg; |
2594e906 NA |
95 | struct list_head *headp, *hpos; |
96 | struct net_bridge_vlan *vent; | |
bc9a25d2 | 97 | |
907b1e6e NA |
98 | if (br_vlan_is_master(v)) |
99 | vg = br_vlan_group(v->br); | |
100 | else | |
101 | vg = nbp_vlan_group(v->port); | |
102 | ||
103 | headp = &vg->vlan_list; | |
2594e906 NA |
104 | list_for_each_prev(hpos, headp) { |
105 | vent = list_entry(hpos, struct net_bridge_vlan, vlist); | |
106 | if (v->vid < vent->vid) | |
107 | continue; | |
108 | else | |
109 | break; | |
243a2e63 | 110 | } |
586c2b57 | 111 | list_add_rcu(&v->vlist, hpos); |
2594e906 | 112 | } |
243a2e63 | 113 | |
2594e906 NA |
114 | static void __vlan_del_list(struct net_bridge_vlan *v) |
115 | { | |
586c2b57 | 116 | list_del_rcu(&v->vlist); |
243a2e63 VY |
117 | } |
118 | ||
bf361ad3 VD |
119 | static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, |
120 | u16 vid) | |
7f109539 | 121 | { |
0944d6b5 JP |
122 | struct switchdev_obj_port_vlan v = { |
123 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
124 | .vid_begin = vid, | |
125 | .vid_end = vid, | |
126 | }; | |
127 | int err; | |
7f109539 | 128 | |
0944d6b5 JP |
129 | /* Try switchdev op first. In case it is not supported, fallback to |
130 | * 8021q del. | |
7f109539 | 131 | */ |
0944d6b5 JP |
132 | err = switchdev_port_obj_del(dev, &v.obj); |
133 | if (err == -EOPNOTSUPP) { | |
7f109539 | 134 | vlan_vid_del(dev, br->vlan_proto, vid); |
0944d6b5 | 135 | return 0; |
7f109539 | 136 | } |
bf361ad3 | 137 | return err; |
7f109539 SF |
138 | } |
139 | ||
f8ed289f NA |
140 | /* Returns a master vlan, if it didn't exist it gets created. In all cases a |
141 | * a reference is taken to the master vlan before returning. | |
142 | */ | |
143 | static struct net_bridge_vlan *br_vlan_get_master(struct net_bridge *br, u16 vid) | |
144 | { | |
907b1e6e | 145 | struct net_bridge_vlan_group *vg; |
f8ed289f NA |
146 | struct net_bridge_vlan *masterv; |
147 | ||
907b1e6e NA |
148 | vg = br_vlan_group(br); |
149 | masterv = br_vlan_find(vg, vid); | |
f8ed289f NA |
150 | if (!masterv) { |
151 | /* missing global ctx, create it now */ | |
152 | if (br_vlan_add(br, vid, 0)) | |
153 | return NULL; | |
907b1e6e | 154 | masterv = br_vlan_find(vg, vid); |
f8ed289f NA |
155 | if (WARN_ON(!masterv)) |
156 | return NULL; | |
157 | } | |
158 | atomic_inc(&masterv->refcnt); | |
159 | ||
160 | return masterv; | |
161 | } | |
162 | ||
163 | static void br_vlan_put_master(struct net_bridge_vlan *masterv) | |
164 | { | |
907b1e6e NA |
165 | struct net_bridge_vlan_group *vg; |
166 | ||
f8ed289f NA |
167 | if (!br_vlan_is_master(masterv)) |
168 | return; | |
169 | ||
907b1e6e | 170 | vg = br_vlan_group(masterv->br); |
f8ed289f | 171 | if (atomic_dec_and_test(&masterv->refcnt)) { |
907b1e6e | 172 | rhashtable_remove_fast(&vg->vlan_hash, |
f8ed289f NA |
173 | &masterv->vnode, br_vlan_rht_params); |
174 | __vlan_del_list(masterv); | |
175 | kfree_rcu(masterv, rcu); | |
176 | } | |
177 | } | |
178 | ||
2594e906 NA |
179 | /* This is the shared VLAN add function which works for both ports and bridge |
180 | * devices. There are four possible calls to this function in terms of the | |
181 | * vlan entry type: | |
182 | * 1. vlan is being added on a port (no master flags, global entry exists) | |
ddd611d3 | 183 | * 2. vlan is being added on a bridge (both master and brentry flags) |
2594e906 | 184 | * 3. vlan is being added on a port, but a global entry didn't exist which |
ddd611d3 | 185 | * is being created right now (master flag set, brentry flag unset), the |
2594e906 | 186 | * global entry is used for global per-vlan features, but not for filtering |
ddd611d3 | 187 | * 4. same as 3 but with both master and brentry flags set so the entry |
2594e906 NA |
188 | * will be used for filtering in both the port and the bridge |
189 | */ | |
190 | static int __vlan_add(struct net_bridge_vlan *v, u16 flags) | |
243a2e63 | 191 | { |
2594e906 NA |
192 | struct net_bridge_vlan *masterv = NULL; |
193 | struct net_bridge_port *p = NULL; | |
6be144f6 | 194 | struct net_bridge_vlan_group *vg; |
2594e906 NA |
195 | struct net_device *dev; |
196 | struct net_bridge *br; | |
197 | int err; | |
198 | ||
199 | if (br_vlan_is_master(v)) { | |
200 | br = v->br; | |
201 | dev = br->dev; | |
907b1e6e | 202 | vg = br_vlan_group(br); |
2594e906 NA |
203 | } else { |
204 | p = v->port; | |
205 | br = p->br; | |
206 | dev = p->dev; | |
907b1e6e | 207 | vg = nbp_vlan_group(p); |
2594e906 NA |
208 | } |
209 | ||
210 | if (p) { | |
2594e906 NA |
211 | /* Add VLAN to the device filter if it is supported. |
212 | * This ensures tagged traffic enters the bridge when | |
213 | * promiscuous mode is disabled by br_manage_promisc(). | |
214 | */ | |
215 | err = __vlan_vid_add(dev, br, v->vid, flags); | |
216 | if (err) | |
217 | goto out; | |
218 | ||
219 | /* need to work on the master vlan too */ | |
220 | if (flags & BRIDGE_VLAN_INFO_MASTER) { | |
2ffdf508 NA |
221 | err = br_vlan_add(br, v->vid, flags | |
222 | BRIDGE_VLAN_INFO_BRENTRY); | |
2594e906 NA |
223 | if (err) |
224 | goto out_filt; | |
225 | } | |
226 | ||
f8ed289f NA |
227 | masterv = br_vlan_get_master(br, v->vid); |
228 | if (!masterv) | |
229 | goto out_filt; | |
2594e906 NA |
230 | v->brvlan = masterv; |
231 | } | |
232 | ||
6be144f6 | 233 | /* Add the dev mac and count the vlan only if it's usable */ |
2594e906 NA |
234 | if (br_vlan_should_use(v)) { |
235 | err = br_fdb_insert(br, p, dev->dev_addr, v->vid); | |
236 | if (err) { | |
237 | br_err(br, "failed insert local address into bridge forwarding table\n"); | |
238 | goto out_filt; | |
239 | } | |
6be144f6 | 240 | vg->num_vlans++; |
2594e906 NA |
241 | } |
242 | ||
6be144f6 NA |
243 | err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, |
244 | br_vlan_rht_params); | |
2594e906 NA |
245 | if (err) |
246 | goto out_fdb_insert; | |
243a2e63 | 247 | |
2594e906 NA |
248 | __vlan_add_list(v); |
249 | __vlan_add_flags(v, flags); | |
2594e906 NA |
250 | out: |
251 | return err; | |
252 | ||
253 | out_fdb_insert: | |
6be144f6 NA |
254 | if (br_vlan_should_use(v)) { |
255 | br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); | |
256 | vg->num_vlans--; | |
257 | } | |
2594e906 NA |
258 | |
259 | out_filt: | |
260 | if (p) { | |
261 | __vlan_vid_del(dev, br, v->vid); | |
262 | if (masterv) { | |
f8ed289f | 263 | br_vlan_put_master(masterv); |
2594e906 NA |
264 | v->brvlan = NULL; |
265 | } | |
266 | } | |
267 | ||
268 | goto out; | |
269 | } | |
270 | ||
271 | static int __vlan_del(struct net_bridge_vlan *v) | |
272 | { | |
273 | struct net_bridge_vlan *masterv = v; | |
77751ee8 | 274 | struct net_bridge_vlan_group *vg; |
2594e906 | 275 | struct net_bridge_port *p = NULL; |
2594e906 | 276 | int err = 0; |
552406c4 | 277 | |
2594e906 | 278 | if (br_vlan_is_master(v)) { |
907b1e6e | 279 | vg = br_vlan_group(v->br); |
2594e906 NA |
280 | } else { |
281 | p = v->port; | |
907b1e6e | 282 | vg = nbp_vlan_group(v->port); |
2594e906 | 283 | masterv = v->brvlan; |
2594e906 | 284 | } |
bf361ad3 | 285 | |
77751ee8 | 286 | __vlan_delete_pvid(vg, v->vid); |
2594e906 NA |
287 | if (p) { |
288 | err = __vlan_vid_del(p->dev, p->br, v->vid); | |
bf361ad3 | 289 | if (err) |
2594e906 | 290 | goto out; |
8580e211 | 291 | } |
243a2e63 | 292 | |
6be144f6 NA |
293 | if (br_vlan_should_use(v)) { |
294 | v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; | |
295 | vg->num_vlans--; | |
2594e906 NA |
296 | } |
297 | ||
298 | if (masterv != v) { | |
77751ee8 NA |
299 | rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, |
300 | br_vlan_rht_params); | |
2594e906 | 301 | __vlan_del_list(v); |
243a2e63 VY |
302 | kfree_rcu(v, rcu); |
303 | } | |
2594e906 | 304 | |
f8ed289f | 305 | br_vlan_put_master(masterv); |
2594e906 NA |
306 | out: |
307 | return err; | |
243a2e63 VY |
308 | } |
309 | ||
f409d0ed NA |
310 | static void __vlan_group_free(struct net_bridge_vlan_group *vg) |
311 | { | |
312 | WARN_ON(!list_empty(&vg->vlan_list)); | |
313 | rhashtable_destroy(&vg->vlan_hash); | |
314 | kfree(vg); | |
315 | } | |
316 | ||
317 | static void __vlan_flush(struct net_bridge_vlan_group *vg) | |
243a2e63 | 318 | { |
2594e906 NA |
319 | struct net_bridge_vlan *vlan, *tmp; |
320 | ||
f409d0ed NA |
321 | __vlan_delete_pvid(vg, vg->pvid); |
322 | list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) | |
2594e906 | 323 | __vlan_del(vlan); |
243a2e63 VY |
324 | } |
325 | ||
78851988 | 326 | struct sk_buff *br_handle_vlan(struct net_bridge *br, |
2594e906 | 327 | struct net_bridge_vlan_group *vg, |
78851988 | 328 | struct sk_buff *skb) |
a37b85c9 | 329 | { |
2594e906 | 330 | struct net_bridge_vlan *v; |
a37b85c9 VY |
331 | u16 vid; |
332 | ||
20adfa1a VY |
333 | /* If this packet was not filtered at input, let it pass */ |
334 | if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) | |
78851988 VY |
335 | goto out; |
336 | ||
2594e906 NA |
337 | /* At this point, we know that the frame was filtered and contains |
338 | * a valid vlan id. If the vlan id has untagged flag set, | |
339 | * send untagged; otherwise, send tagged. | |
340 | */ | |
341 | br_vlan_get_tag(skb, &vid); | |
342 | v = br_vlan_find(vg, vid); | |
343 | /* Vlan entry must be configured at this point. The | |
fc92f745 VY |
344 | * only exception is the bridge is set in promisc mode and the |
345 | * packet is destined for the bridge device. In this case | |
346 | * pass the packet as is. | |
347 | */ | |
2594e906 | 348 | if (!v || !br_vlan_should_use(v)) { |
fc92f745 VY |
349 | if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { |
350 | goto out; | |
351 | } else { | |
352 | kfree_skb(skb); | |
353 | return NULL; | |
354 | } | |
355 | } | |
2594e906 | 356 | if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) |
99b192da | 357 | skb->vlan_tci = 0; |
78851988 VY |
358 | |
359 | out: | |
360 | return skb; | |
361 | } | |
362 | ||
363 | /* Called under RCU */ | |
77751ee8 | 364 | static bool __allowed_ingress(struct net_bridge_vlan_group *vg, __be16 proto, |
2594e906 | 365 | struct sk_buff *skb, u16 *vid) |
78851988 | 366 | { |
2594e906 | 367 | const struct net_bridge_vlan *v; |
8580e211 | 368 | bool tagged; |
a37b85c9 | 369 | |
20adfa1a | 370 | BR_INPUT_SKB_CB(skb)->vlan_filtered = true; |
12464bb8 TM |
371 | /* If vlan tx offload is disabled on bridge device and frame was |
372 | * sent from vlan device on the bridge device, it does not have | |
373 | * HW accelerated vlan tag. | |
374 | */ | |
df8a39de | 375 | if (unlikely(!skb_vlan_tag_present(skb) && |
8580e211 | 376 | skb->protocol == proto)) { |
0d5501c1 | 377 | skb = skb_vlan_untag(skb); |
12464bb8 TM |
378 | if (unlikely(!skb)) |
379 | return false; | |
380 | } | |
381 | ||
8580e211 TM |
382 | if (!br_vlan_get_tag(skb, vid)) { |
383 | /* Tagged frame */ | |
384 | if (skb->vlan_proto != proto) { | |
385 | /* Protocol-mismatch, empty out vlan_tci for new tag */ | |
386 | skb_push(skb, ETH_HLEN); | |
62749e2c | 387 | skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, |
df8a39de | 388 | skb_vlan_tag_get(skb)); |
8580e211 TM |
389 | if (unlikely(!skb)) |
390 | return false; | |
391 | ||
392 | skb_pull(skb, ETH_HLEN); | |
393 | skb_reset_mac_len(skb); | |
394 | *vid = 0; | |
395 | tagged = false; | |
396 | } else { | |
397 | tagged = true; | |
398 | } | |
399 | } else { | |
400 | /* Untagged frame */ | |
401 | tagged = false; | |
402 | } | |
403 | ||
b90356ce | 404 | if (!*vid) { |
77751ee8 NA |
405 | u16 pvid = br_get_pvid(vg); |
406 | ||
b90356ce TM |
407 | /* Frame had a tag with VID 0 or did not have a tag. |
408 | * See if pvid is set on this port. That tells us which | |
409 | * vlan untagged or priority-tagged traffic belongs to. | |
78851988 | 410 | */ |
3df6bf45 | 411 | if (!pvid) |
eb707618 | 412 | goto drop; |
78851988 | 413 | |
b90356ce TM |
414 | /* PVID is set on this port. Any untagged or priority-tagged |
415 | * ingress frame is considered to belong to this vlan. | |
78851988 | 416 | */ |
dfb5fa32 | 417 | *vid = pvid; |
8580e211 | 418 | if (likely(!tagged)) |
b90356ce | 419 | /* Untagged Frame. */ |
8580e211 | 420 | __vlan_hwaccel_put_tag(skb, proto, pvid); |
b90356ce TM |
421 | else |
422 | /* Priority-tagged Frame. | |
423 | * At this point, We know that skb->vlan_tci had | |
424 | * VLAN_TAG_PRESENT bit and its VID field was 0x000. | |
425 | * We update only VID field and preserve PCP field. | |
426 | */ | |
427 | skb->vlan_tci |= pvid; | |
428 | ||
78851988 VY |
429 | return true; |
430 | } | |
431 | ||
432 | /* Frame had a valid vlan tag. See if vlan is allowed */ | |
77751ee8 | 433 | v = br_vlan_find(vg, *vid); |
2594e906 | 434 | if (v && br_vlan_should_use(v)) |
a37b85c9 | 435 | return true; |
eb707618 TM |
436 | drop: |
437 | kfree_skb(skb); | |
a37b85c9 VY |
438 | return false; |
439 | } | |
440 | ||
77751ee8 NA |
441 | bool br_allowed_ingress(const struct net_bridge *br, |
442 | struct net_bridge_vlan_group *vg, struct sk_buff *skb, | |
443 | u16 *vid) | |
2594e906 NA |
444 | { |
445 | /* If VLAN filtering is disabled on the bridge, all packets are | |
446 | * permitted. | |
447 | */ | |
448 | if (!br->vlan_enabled) { | |
449 | BR_INPUT_SKB_CB(skb)->vlan_filtered = false; | |
450 | return true; | |
451 | } | |
452 | ||
77751ee8 | 453 | return __allowed_ingress(vg, br->vlan_proto, skb, vid); |
2594e906 NA |
454 | } |
455 | ||
85f46c6b | 456 | /* Called under RCU. */ |
2594e906 | 457 | bool br_allowed_egress(struct net_bridge_vlan_group *vg, |
85f46c6b VY |
458 | const struct sk_buff *skb) |
459 | { | |
2594e906 | 460 | const struct net_bridge_vlan *v; |
85f46c6b VY |
461 | u16 vid; |
462 | ||
20adfa1a VY |
463 | /* If this packet was not filtered at input, let it pass */ |
464 | if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) | |
85f46c6b VY |
465 | return true; |
466 | ||
85f46c6b | 467 | br_vlan_get_tag(skb, &vid); |
2594e906 NA |
468 | v = br_vlan_find(vg, vid); |
469 | if (v && br_vlan_should_use(v)) | |
85f46c6b VY |
470 | return true; |
471 | ||
472 | return false; | |
473 | } | |
474 | ||
e0d7968a TM |
475 | /* Called under RCU */ |
476 | bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) | |
477 | { | |
468e7944 | 478 | struct net_bridge_vlan_group *vg; |
e0d7968a | 479 | struct net_bridge *br = p->br; |
e0d7968a | 480 | |
20adfa1a | 481 | /* If filtering was disabled at input, let it pass. */ |
c095f248 | 482 | if (!br->vlan_enabled) |
e0d7968a TM |
483 | return true; |
484 | ||
eca1e006 | 485 | vg = nbp_vlan_group_rcu(p); |
468e7944 | 486 | if (!vg || !vg->num_vlans) |
e0d7968a TM |
487 | return false; |
488 | ||
8580e211 TM |
489 | if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) |
490 | *vid = 0; | |
491 | ||
e0d7968a | 492 | if (!*vid) { |
77751ee8 | 493 | *vid = br_get_pvid(vg); |
3df6bf45 | 494 | if (!*vid) |
e0d7968a TM |
495 | return false; |
496 | ||
497 | return true; | |
498 | } | |
499 | ||
77751ee8 | 500 | if (br_vlan_find(vg, *vid)) |
e0d7968a TM |
501 | return true; |
502 | ||
503 | return false; | |
504 | } | |
505 | ||
8adff41c TM |
506 | /* Must be protected by RTNL. |
507 | * Must be called with vid in range from 1 to 4094 inclusive. | |
508 | */ | |
552406c4 | 509 | int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) |
243a2e63 | 510 | { |
907b1e6e | 511 | struct net_bridge_vlan_group *vg; |
2594e906 NA |
512 | struct net_bridge_vlan *vlan; |
513 | int ret; | |
243a2e63 VY |
514 | |
515 | ASSERT_RTNL(); | |
516 | ||
907b1e6e NA |
517 | vg = br_vlan_group(br); |
518 | vlan = br_vlan_find(vg, vid); | |
2594e906 NA |
519 | if (vlan) { |
520 | if (!br_vlan_is_brentry(vlan)) { | |
521 | /* Trying to change flags of non-existent bridge vlan */ | |
522 | if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) | |
523 | return -EINVAL; | |
524 | /* It was only kept for port vlans, now make it real */ | |
525 | ret = br_fdb_insert(br, NULL, br->dev->dev_addr, | |
526 | vlan->vid); | |
527 | if (ret) { | |
528 | br_err(br, "failed insert local address into bridge forwarding table\n"); | |
529 | return ret; | |
530 | } | |
531 | atomic_inc(&vlan->refcnt); | |
532 | vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; | |
907b1e6e | 533 | vg->num_vlans++; |
2594e906 NA |
534 | } |
535 | __vlan_add_flags(vlan, flags); | |
536 | return 0; | |
537 | } | |
243a2e63 | 538 | |
2594e906 NA |
539 | vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
540 | if (!vlan) | |
243a2e63 VY |
541 | return -ENOMEM; |
542 | ||
2594e906 NA |
543 | vlan->vid = vid; |
544 | vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; | |
545 | vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; | |
546 | vlan->br = br; | |
547 | if (flags & BRIDGE_VLAN_INFO_BRENTRY) | |
548 | atomic_set(&vlan->refcnt, 1); | |
549 | ret = __vlan_add(vlan, flags); | |
550 | if (ret) | |
551 | kfree(vlan); | |
243a2e63 | 552 | |
2594e906 | 553 | return ret; |
243a2e63 VY |
554 | } |
555 | ||
8adff41c TM |
556 | /* Must be protected by RTNL. |
557 | * Must be called with vid in range from 1 to 4094 inclusive. | |
558 | */ | |
243a2e63 VY |
559 | int br_vlan_delete(struct net_bridge *br, u16 vid) |
560 | { | |
907b1e6e | 561 | struct net_bridge_vlan_group *vg; |
2594e906 | 562 | struct net_bridge_vlan *v; |
243a2e63 VY |
563 | |
564 | ASSERT_RTNL(); | |
565 | ||
907b1e6e NA |
566 | vg = br_vlan_group(br); |
567 | v = br_vlan_find(vg, vid); | |
2594e906 NA |
568 | if (!v || !br_vlan_is_brentry(v)) |
569 | return -ENOENT; | |
243a2e63 | 570 | |
424bb9c9 | 571 | br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); |
3741873b | 572 | br_fdb_delete_by_port(br, NULL, vid, 0); |
bc9a25d2 | 573 | |
2594e906 | 574 | return __vlan_del(v); |
243a2e63 VY |
575 | } |
576 | ||
577 | void br_vlan_flush(struct net_bridge *br) | |
578 | { | |
f409d0ed NA |
579 | struct net_bridge_vlan_group *vg; |
580 | ||
243a2e63 | 581 | ASSERT_RTNL(); |
243a2e63 | 582 | |
f409d0ed NA |
583 | vg = br_vlan_group(br); |
584 | __vlan_flush(vg); | |
585 | RCU_INIT_POINTER(br->vlgrp, NULL); | |
586 | synchronize_rcu(); | |
587 | __vlan_group_free(vg); | |
243a2e63 VY |
588 | } |
589 | ||
2594e906 | 590 | struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) |
2b292fb4 | 591 | { |
2594e906 NA |
592 | if (!vg) |
593 | return NULL; | |
2b292fb4 | 594 | |
2594e906 | 595 | return br_vlan_lookup(&vg->vlan_hash, vid); |
2b292fb4 TM |
596 | } |
597 | ||
204177f3 TM |
598 | /* Must be protected by RTNL. */ |
599 | static void recalculate_group_addr(struct net_bridge *br) | |
600 | { | |
601 | if (br->group_addr_set) | |
602 | return; | |
603 | ||
604 | spin_lock_bh(&br->lock); | |
605 | if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) { | |
606 | /* Bridge Group Address */ | |
607 | br->group_addr[5] = 0x00; | |
608 | } else { /* vlan_enabled && ETH_P_8021AD */ | |
609 | /* Provider Bridge Group Address */ | |
610 | br->group_addr[5] = 0x08; | |
611 | } | |
612 | spin_unlock_bh(&br->lock); | |
613 | } | |
614 | ||
615 | /* Must be protected by RTNL. */ | |
616 | void br_recalculate_fwd_mask(struct net_bridge *br) | |
617 | { | |
618 | if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) | |
619 | br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; | |
620 | else /* vlan_enabled && ETH_P_8021AD */ | |
621 | br->group_fwd_mask_required = BR_GROUPFWD_8021AD & | |
622 | ~(1u << br->group_addr[5]); | |
623 | } | |
624 | ||
a7854037 | 625 | int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) |
243a2e63 | 626 | { |
243a2e63 | 627 | if (br->vlan_enabled == val) |
a7854037 | 628 | return 0; |
243a2e63 VY |
629 | |
630 | br->vlan_enabled = val; | |
2796d0c6 | 631 | br_manage_promisc(br); |
204177f3 TM |
632 | recalculate_group_addr(br); |
633 | br_recalculate_fwd_mask(br); | |
243a2e63 | 634 | |
a7854037 NA |
635 | return 0; |
636 | } | |
637 | ||
638 | int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) | |
639 | { | |
640 | if (!rtnl_trylock()) | |
641 | return restart_syscall(); | |
642 | ||
643 | __br_vlan_filter_toggle(br, val); | |
243a2e63 | 644 | rtnl_unlock(); |
a7854037 | 645 | |
243a2e63 VY |
646 | return 0; |
647 | } | |
648 | ||
d2d427b3 | 649 | int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) |
204177f3 TM |
650 | { |
651 | int err = 0; | |
652 | struct net_bridge_port *p; | |
2594e906 | 653 | struct net_bridge_vlan *vlan; |
907b1e6e | 654 | struct net_bridge_vlan_group *vg; |
d2d427b3 | 655 | __be16 oldproto; |
204177f3 | 656 | |
204177f3 | 657 | if (br->vlan_proto == proto) |
d2d427b3 | 658 | return 0; |
204177f3 TM |
659 | |
660 | /* Add VLANs for the new proto to the device filter. */ | |
661 | list_for_each_entry(p, &br->port_list, list) { | |
907b1e6e NA |
662 | vg = nbp_vlan_group(p); |
663 | list_for_each_entry(vlan, &vg->vlan_list, vlist) { | |
2594e906 | 664 | err = vlan_vid_add(p->dev, proto, vlan->vid); |
204177f3 TM |
665 | if (err) |
666 | goto err_filt; | |
667 | } | |
668 | } | |
669 | ||
670 | oldproto = br->vlan_proto; | |
671 | br->vlan_proto = proto; | |
672 | ||
673 | recalculate_group_addr(br); | |
674 | br_recalculate_fwd_mask(br); | |
675 | ||
676 | /* Delete VLANs for the old proto from the device filter. */ | |
907b1e6e NA |
677 | list_for_each_entry(p, &br->port_list, list) { |
678 | vg = nbp_vlan_group(p); | |
679 | list_for_each_entry(vlan, &vg->vlan_list, vlist) | |
2594e906 | 680 | vlan_vid_del(p->dev, oldproto, vlan->vid); |
907b1e6e | 681 | } |
204177f3 | 682 | |
d2d427b3 | 683 | return 0; |
204177f3 TM |
684 | |
685 | err_filt: | |
907b1e6e | 686 | list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) |
2594e906 | 687 | vlan_vid_del(p->dev, proto, vlan->vid); |
204177f3 | 688 | |
907b1e6e NA |
689 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
690 | vg = nbp_vlan_group(p); | |
691 | list_for_each_entry(vlan, &vg->vlan_list, vlist) | |
2594e906 | 692 | vlan_vid_del(p->dev, proto, vlan->vid); |
907b1e6e | 693 | } |
204177f3 | 694 | |
d2d427b3 TM |
695 | return err; |
696 | } | |
697 | ||
698 | int br_vlan_set_proto(struct net_bridge *br, unsigned long val) | |
699 | { | |
700 | int err; | |
701 | ||
702 | if (val != ETH_P_8021Q && val != ETH_P_8021AD) | |
703 | return -EPROTONOSUPPORT; | |
704 | ||
705 | if (!rtnl_trylock()) | |
706 | return restart_syscall(); | |
707 | ||
708 | err = __br_vlan_set_proto(br, htons(val)); | |
709 | rtnl_unlock(); | |
710 | ||
711 | return err; | |
204177f3 TM |
712 | } |
713 | ||
77751ee8 | 714 | static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) |
5be5a2df | 715 | { |
2594e906 NA |
716 | struct net_bridge_vlan *v; |
717 | ||
77751ee8 | 718 | if (vid != vg->pvid) |
2594e906 NA |
719 | return false; |
720 | ||
721 | v = br_vlan_lookup(&vg->vlan_hash, vid); | |
722 | if (v && br_vlan_should_use(v) && | |
723 | (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) | |
724 | return true; | |
725 | ||
726 | return false; | |
5be5a2df VY |
727 | } |
728 | ||
729 | static void br_vlan_disable_default_pvid(struct net_bridge *br) | |
730 | { | |
731 | struct net_bridge_port *p; | |
732 | u16 pvid = br->default_pvid; | |
733 | ||
734 | /* Disable default_pvid on all ports where it is still | |
735 | * configured. | |
736 | */ | |
907b1e6e | 737 | if (vlan_default_pvid(br_vlan_group(br), pvid)) |
5be5a2df VY |
738 | br_vlan_delete(br, pvid); |
739 | ||
740 | list_for_each_entry(p, &br->port_list, list) { | |
907b1e6e | 741 | if (vlan_default_pvid(nbp_vlan_group(p), pvid)) |
5be5a2df VY |
742 | nbp_vlan_delete(p, pvid); |
743 | } | |
744 | ||
745 | br->default_pvid = 0; | |
746 | } | |
747 | ||
0f963b75 | 748 | int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid) |
5be5a2df | 749 | { |
2594e906 | 750 | const struct net_bridge_vlan *pvent; |
907b1e6e | 751 | struct net_bridge_vlan_group *vg; |
5be5a2df VY |
752 | struct net_bridge_port *p; |
753 | u16 old_pvid; | |
754 | int err = 0; | |
755 | unsigned long *changed; | |
756 | ||
0f963b75 NA |
757 | if (!pvid) { |
758 | br_vlan_disable_default_pvid(br); | |
759 | return 0; | |
760 | } | |
761 | ||
5be5a2df VY |
762 | changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), |
763 | GFP_KERNEL); | |
764 | if (!changed) | |
765 | return -ENOMEM; | |
766 | ||
767 | old_pvid = br->default_pvid; | |
768 | ||
769 | /* Update default_pvid config only if we do not conflict with | |
770 | * user configuration. | |
771 | */ | |
907b1e6e NA |
772 | vg = br_vlan_group(br); |
773 | pvent = br_vlan_find(vg, pvid); | |
774 | if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && | |
2594e906 | 775 | (!pvent || !br_vlan_should_use(pvent))) { |
5be5a2df VY |
776 | err = br_vlan_add(br, pvid, |
777 | BRIDGE_VLAN_INFO_PVID | | |
2594e906 NA |
778 | BRIDGE_VLAN_INFO_UNTAGGED | |
779 | BRIDGE_VLAN_INFO_BRENTRY); | |
5be5a2df VY |
780 | if (err) |
781 | goto out; | |
782 | br_vlan_delete(br, old_pvid); | |
783 | set_bit(0, changed); | |
784 | } | |
785 | ||
786 | list_for_each_entry(p, &br->port_list, list) { | |
787 | /* Update default_pvid config only if we do not conflict with | |
788 | * user configuration. | |
789 | */ | |
907b1e6e | 790 | vg = nbp_vlan_group(p); |
5be5a2df | 791 | if ((old_pvid && |
907b1e6e NA |
792 | !vlan_default_pvid(vg, old_pvid)) || |
793 | br_vlan_find(vg, pvid)) | |
5be5a2df VY |
794 | continue; |
795 | ||
796 | err = nbp_vlan_add(p, pvid, | |
797 | BRIDGE_VLAN_INFO_PVID | | |
798 | BRIDGE_VLAN_INFO_UNTAGGED); | |
799 | if (err) | |
800 | goto err_port; | |
801 | nbp_vlan_delete(p, old_pvid); | |
802 | set_bit(p->port_no, changed); | |
803 | } | |
804 | ||
805 | br->default_pvid = pvid; | |
806 | ||
807 | out: | |
808 | kfree(changed); | |
809 | return err; | |
810 | ||
811 | err_port: | |
812 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { | |
813 | if (!test_bit(p->port_no, changed)) | |
814 | continue; | |
815 | ||
816 | if (old_pvid) | |
817 | nbp_vlan_add(p, old_pvid, | |
818 | BRIDGE_VLAN_INFO_PVID | | |
819 | BRIDGE_VLAN_INFO_UNTAGGED); | |
820 | nbp_vlan_delete(p, pvid); | |
821 | } | |
822 | ||
823 | if (test_bit(0, changed)) { | |
824 | if (old_pvid) | |
825 | br_vlan_add(br, old_pvid, | |
826 | BRIDGE_VLAN_INFO_PVID | | |
2594e906 NA |
827 | BRIDGE_VLAN_INFO_UNTAGGED | |
828 | BRIDGE_VLAN_INFO_BRENTRY); | |
5be5a2df VY |
829 | br_vlan_delete(br, pvid); |
830 | } | |
831 | goto out; | |
832 | } | |
833 | ||
96a20d9d VY |
834 | int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) |
835 | { | |
836 | u16 pvid = val; | |
837 | int err = 0; | |
838 | ||
5be5a2df | 839 | if (val >= VLAN_VID_MASK) |
96a20d9d VY |
840 | return -EINVAL; |
841 | ||
842 | if (!rtnl_trylock()) | |
843 | return restart_syscall(); | |
844 | ||
845 | if (pvid == br->default_pvid) | |
846 | goto unlock; | |
847 | ||
848 | /* Only allow default pvid change when filtering is disabled */ | |
849 | if (br->vlan_enabled) { | |
850 | pr_info_once("Please disable vlan filtering to change default_pvid\n"); | |
851 | err = -EPERM; | |
852 | goto unlock; | |
853 | } | |
0f963b75 | 854 | err = __br_vlan_set_default_pvid(br, pvid); |
96a20d9d VY |
855 | unlock: |
856 | rtnl_unlock(); | |
857 | return err; | |
858 | } | |
859 | ||
5be5a2df | 860 | int br_vlan_init(struct net_bridge *br) |
8580e211 | 861 | { |
907b1e6e | 862 | struct net_bridge_vlan_group *vg; |
2594e906 NA |
863 | int ret = -ENOMEM; |
864 | ||
907b1e6e NA |
865 | vg = kzalloc(sizeof(*vg), GFP_KERNEL); |
866 | if (!vg) | |
2594e906 | 867 | goto out; |
907b1e6e | 868 | ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); |
2594e906 NA |
869 | if (ret) |
870 | goto err_rhtbl; | |
907b1e6e | 871 | INIT_LIST_HEAD(&vg->vlan_list); |
8580e211 | 872 | br->vlan_proto = htons(ETH_P_8021Q); |
96a20d9d | 873 | br->default_pvid = 1; |
907b1e6e | 874 | rcu_assign_pointer(br->vlgrp, vg); |
2594e906 NA |
875 | ret = br_vlan_add(br, 1, |
876 | BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | | |
877 | BRIDGE_VLAN_INFO_BRENTRY); | |
878 | if (ret) | |
879 | goto err_vlan_add; | |
880 | ||
881 | out: | |
882 | return ret; | |
883 | ||
884 | err_vlan_add: | |
907b1e6e | 885 | rhashtable_destroy(&vg->vlan_hash); |
2594e906 | 886 | err_rhtbl: |
907b1e6e | 887 | kfree(vg); |
2594e906 NA |
888 | |
889 | goto out; | |
890 | } | |
891 | ||
892 | int nbp_vlan_init(struct net_bridge_port *p) | |
893 | { | |
263344e6 | 894 | struct net_bridge_vlan_group *vg; |
2594e906 NA |
895 | int ret = -ENOMEM; |
896 | ||
263344e6 NA |
897 | vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); |
898 | if (!vg) | |
2594e906 NA |
899 | goto out; |
900 | ||
263344e6 | 901 | ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); |
2594e906 NA |
902 | if (ret) |
903 | goto err_rhtbl; | |
263344e6 | 904 | INIT_LIST_HEAD(&vg->vlan_list); |
907b1e6e | 905 | rcu_assign_pointer(p->vlgrp, vg); |
2594e906 NA |
906 | if (p->br->default_pvid) { |
907 | ret = nbp_vlan_add(p, p->br->default_pvid, | |
908 | BRIDGE_VLAN_INFO_PVID | | |
909 | BRIDGE_VLAN_INFO_UNTAGGED); | |
910 | if (ret) | |
911 | goto err_vlan_add; | |
912 | } | |
913 | out: | |
914 | return ret; | |
915 | ||
916 | err_vlan_add: | |
07bc588f IS |
917 | RCU_INIT_POINTER(p->vlgrp, NULL); |
918 | synchronize_rcu(); | |
263344e6 | 919 | rhashtable_destroy(&vg->vlan_hash); |
2594e906 | 920 | err_rhtbl: |
263344e6 | 921 | kfree(vg); |
2594e906 NA |
922 | |
923 | goto out; | |
8580e211 TM |
924 | } |
925 | ||
8adff41c TM |
926 | /* Must be protected by RTNL. |
927 | * Must be called with vid in range from 1 to 4094 inclusive. | |
928 | */ | |
552406c4 | 929 | int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) |
243a2e63 | 930 | { |
2594e906 NA |
931 | struct net_bridge_vlan *vlan; |
932 | int ret; | |
243a2e63 VY |
933 | |
934 | ASSERT_RTNL(); | |
935 | ||
907b1e6e | 936 | vlan = br_vlan_find(nbp_vlan_group(port), vid); |
2594e906 NA |
937 | if (vlan) { |
938 | __vlan_add_flags(vlan, flags); | |
939 | return 0; | |
243a2e63 VY |
940 | } |
941 | ||
2594e906 NA |
942 | vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
943 | if (!vlan) | |
944 | return -ENOMEM; | |
243a2e63 | 945 | |
2594e906 NA |
946 | vlan->vid = vid; |
947 | vlan->port = port; | |
948 | ret = __vlan_add(vlan, flags); | |
949 | if (ret) | |
950 | kfree(vlan); | |
243a2e63 | 951 | |
2594e906 | 952 | return ret; |
243a2e63 VY |
953 | } |
954 | ||
8adff41c TM |
955 | /* Must be protected by RTNL. |
956 | * Must be called with vid in range from 1 to 4094 inclusive. | |
957 | */ | |
243a2e63 VY |
958 | int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) |
959 | { | |
2594e906 | 960 | struct net_bridge_vlan *v; |
243a2e63 VY |
961 | |
962 | ASSERT_RTNL(); | |
963 | ||
907b1e6e | 964 | v = br_vlan_find(nbp_vlan_group(port), vid); |
2594e906 NA |
965 | if (!v) |
966 | return -ENOENT; | |
424bb9c9 | 967 | br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); |
1ea2d020 | 968 | br_fdb_delete_by_port(port->br, port, vid, 0); |
bc9a25d2 | 969 | |
2594e906 | 970 | return __vlan_del(v); |
243a2e63 VY |
971 | } |
972 | ||
973 | void nbp_vlan_flush(struct net_bridge_port *port) | |
974 | { | |
f409d0ed NA |
975 | struct net_bridge_vlan_group *vg; |
976 | ||
243a2e63 VY |
977 | ASSERT_RTNL(); |
978 | ||
f409d0ed NA |
979 | vg = nbp_vlan_group(port); |
980 | __vlan_flush(vg); | |
981 | RCU_INIT_POINTER(port->vlgrp, NULL); | |
982 | synchronize_rcu(); | |
983 | __vlan_group_free(vg); | |
5be5a2df | 984 | } |