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 | ||
34 | static void __vlan_add_pvid(u16 *pvid, u16 vid) | |
35 | { | |
36 | if (*pvid == vid) | |
552406c4 VY |
37 | return; |
38 | ||
39 | smp_wmb(); | |
2594e906 | 40 | *pvid = vid; |
552406c4 VY |
41 | } |
42 | ||
2594e906 | 43 | static void __vlan_delete_pvid(u16 *pvid, u16 vid) |
552406c4 | 44 | { |
2594e906 | 45 | if (*pvid != vid) |
552406c4 VY |
46 | return; |
47 | ||
48 | smp_wmb(); | |
2594e906 | 49 | *pvid = 0; |
552406c4 VY |
50 | } |
51 | ||
2594e906 | 52 | static void __vlan_add_flags(struct net_bridge_vlan *v, u16 flags) |
35e03f3a | 53 | { |
2594e906 NA |
54 | if (flags & BRIDGE_VLAN_INFO_PVID) { |
55 | if (br_vlan_is_master(v)) | |
56 | __vlan_add_pvid(&v->br->pvid, v->vid); | |
57 | else | |
58 | __vlan_add_pvid(&v->port->pvid, v->vid); | |
59 | } else { | |
60 | if (br_vlan_is_master(v)) | |
61 | __vlan_delete_pvid(&v->br->pvid, v->vid); | |
62 | else | |
63 | __vlan_delete_pvid(&v->port->pvid, v->vid); | |
64 | } | |
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 | { | |
75 | const struct net_device_ops *ops = dev->netdev_ops; | |
76 | int err; | |
77 | ||
78 | /* If driver uses VLAN ndo ops, use 8021q to install vid | |
79 | * on device, otherwise try switchdev ops to install vid. | |
80 | */ | |
81 | ||
82 | if (ops->ndo_vlan_rx_add_vid) { | |
83 | err = vlan_vid_add(dev, br->vlan_proto, vid); | |
84 | } else { | |
ab069002 VD |
85 | struct switchdev_obj_vlan v = { |
86 | .flags = flags, | |
87 | .vid_begin = vid, | |
88 | .vid_end = vid, | |
7f109539 SF |
89 | }; |
90 | ||
ab069002 | 91 | err = switchdev_port_obj_add(dev, SWITCHDEV_OBJ_PORT_VLAN, &v); |
7f109539 SF |
92 | if (err == -EOPNOTSUPP) |
93 | err = 0; | |
94 | } | |
95 | ||
96 | return err; | |
97 | } | |
98 | ||
2594e906 | 99 | static void __vlan_add_list(struct net_bridge_vlan *v) |
243a2e63 | 100 | { |
2594e906 NA |
101 | struct list_head *headp, *hpos; |
102 | struct net_bridge_vlan *vent; | |
bc9a25d2 | 103 | |
2594e906 NA |
104 | headp = br_vlan_is_master(v) ? &v->br->vlgrp->vlan_list : |
105 | &v->port->vlgrp->vlan_list; | |
106 | list_for_each_prev(hpos, headp) { | |
107 | vent = list_entry(hpos, struct net_bridge_vlan, vlist); | |
108 | if (v->vid < vent->vid) | |
109 | continue; | |
110 | else | |
111 | break; | |
243a2e63 | 112 | } |
2594e906 NA |
113 | list_add(&v->vlist, hpos); |
114 | } | |
243a2e63 | 115 | |
2594e906 NA |
116 | static void __vlan_del_list(struct net_bridge_vlan *v) |
117 | { | |
118 | list_del(&v->vlist); | |
243a2e63 VY |
119 | } |
120 | ||
bf361ad3 VD |
121 | static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, |
122 | u16 vid) | |
7f109539 SF |
123 | { |
124 | const struct net_device_ops *ops = dev->netdev_ops; | |
bf361ad3 | 125 | int err = 0; |
7f109539 SF |
126 | |
127 | /* If driver uses VLAN ndo ops, use 8021q to delete vid | |
128 | * on device, otherwise try switchdev ops to delete vid. | |
129 | */ | |
130 | ||
131 | if (ops->ndo_vlan_rx_kill_vid) { | |
132 | vlan_vid_del(dev, br->vlan_proto, vid); | |
133 | } else { | |
ab069002 VD |
134 | struct switchdev_obj_vlan v = { |
135 | .vid_begin = vid, | |
136 | .vid_end = vid, | |
7f109539 SF |
137 | }; |
138 | ||
ab069002 | 139 | err = switchdev_port_obj_del(dev, SWITCHDEV_OBJ_PORT_VLAN, &v); |
bf361ad3 VD |
140 | if (err == -EOPNOTSUPP) |
141 | err = 0; | |
7f109539 | 142 | } |
bf361ad3 VD |
143 | |
144 | return err; | |
7f109539 SF |
145 | } |
146 | ||
2594e906 NA |
147 | /* This is the shared VLAN add function which works for both ports and bridge |
148 | * devices. There are four possible calls to this function in terms of the | |
149 | * vlan entry type: | |
150 | * 1. vlan is being added on a port (no master flags, global entry exists) | |
151 | * 2. vlan is being added on a bridge (both master and brvlan flags) | |
152 | * 3. vlan is being added on a port, but a global entry didn't exist which | |
153 | * is being created right now (master flag set, brvlan flag unset), the | |
154 | * global entry is used for global per-vlan features, but not for filtering | |
155 | * 4. same as 3 but with both master and brvlan flags set so the entry | |
156 | * will be used for filtering in both the port and the bridge | |
157 | */ | |
158 | static int __vlan_add(struct net_bridge_vlan *v, u16 flags) | |
243a2e63 | 159 | { |
2594e906 NA |
160 | struct net_bridge_vlan *masterv = NULL; |
161 | struct net_bridge_port *p = NULL; | |
162 | struct rhashtable *tbl; | |
163 | struct net_device *dev; | |
164 | struct net_bridge *br; | |
165 | int err; | |
166 | ||
167 | if (br_vlan_is_master(v)) { | |
168 | br = v->br; | |
169 | dev = br->dev; | |
170 | tbl = &br->vlgrp->vlan_hash; | |
171 | } else { | |
172 | p = v->port; | |
173 | br = p->br; | |
174 | dev = p->dev; | |
175 | tbl = &p->vlgrp->vlan_hash; | |
176 | } | |
177 | ||
178 | if (p) { | |
179 | u16 master_flags = flags; | |
180 | ||
181 | /* Add VLAN to the device filter if it is supported. | |
182 | * This ensures tagged traffic enters the bridge when | |
183 | * promiscuous mode is disabled by br_manage_promisc(). | |
184 | */ | |
185 | err = __vlan_vid_add(dev, br, v->vid, flags); | |
186 | if (err) | |
187 | goto out; | |
188 | ||
189 | /* need to work on the master vlan too */ | |
190 | if (flags & BRIDGE_VLAN_INFO_MASTER) { | |
191 | master_flags |= BRIDGE_VLAN_INFO_BRENTRY; | |
192 | err = br_vlan_add(br, v->vid, master_flags); | |
193 | if (err) | |
194 | goto out_filt; | |
195 | } | |
196 | ||
197 | masterv = br_vlan_find(br->vlgrp, v->vid); | |
198 | if (!masterv) { | |
199 | /* missing global ctx, create it now */ | |
200 | err = br_vlan_add(br, v->vid, master_flags); | |
201 | if (err) | |
202 | goto out_filt; | |
203 | masterv = br_vlan_find(br->vlgrp, v->vid); | |
204 | WARN_ON(!masterv); | |
205 | } | |
206 | atomic_inc(&masterv->refcnt); | |
207 | v->brvlan = masterv; | |
208 | } | |
209 | ||
210 | /* Add the dev mac only if it's a usable vlan */ | |
211 | if (br_vlan_should_use(v)) { | |
212 | err = br_fdb_insert(br, p, dev->dev_addr, v->vid); | |
213 | if (err) { | |
214 | br_err(br, "failed insert local address into bridge forwarding table\n"); | |
215 | goto out_filt; | |
216 | } | |
217 | } | |
218 | ||
219 | err = rhashtable_lookup_insert_fast(tbl, &v->vnode, br_vlan_rht_params); | |
220 | if (err) | |
221 | goto out_fdb_insert; | |
243a2e63 | 222 | |
2594e906 NA |
223 | __vlan_add_list(v); |
224 | __vlan_add_flags(v, flags); | |
225 | if (br_vlan_is_master(v)) { | |
226 | if (br_vlan_is_brentry(v)) | |
227 | br->vlgrp->num_vlans++; | |
228 | } else { | |
229 | p->vlgrp->num_vlans++; | |
230 | } | |
231 | out: | |
232 | return err; | |
233 | ||
234 | out_fdb_insert: | |
235 | br_fdb_find_delete_local(br, p, br->dev->dev_addr, v->vid); | |
236 | ||
237 | out_filt: | |
238 | if (p) { | |
239 | __vlan_vid_del(dev, br, v->vid); | |
240 | if (masterv) { | |
241 | atomic_dec(&masterv->refcnt); | |
242 | v->brvlan = NULL; | |
243 | } | |
244 | } | |
245 | ||
246 | goto out; | |
247 | } | |
248 | ||
249 | static int __vlan_del(struct net_bridge_vlan *v) | |
250 | { | |
251 | struct net_bridge_vlan *masterv = v; | |
252 | struct net_bridge_port *p = NULL; | |
253 | struct net_bridge *br; | |
254 | int err = 0; | |
255 | struct rhashtable *tbl; | |
256 | u16 *pvid; | |
552406c4 | 257 | |
2594e906 NA |
258 | if (br_vlan_is_master(v)) { |
259 | br = v->br; | |
260 | tbl = &v->br->vlgrp->vlan_hash; | |
261 | pvid = &v->br->pvid; | |
262 | } else { | |
263 | p = v->port; | |
264 | br = p->br; | |
265 | tbl = &p->vlgrp->vlan_hash; | |
266 | masterv = v->brvlan; | |
267 | pvid = &p->pvid; | |
268 | } | |
bf361ad3 | 269 | |
2594e906 NA |
270 | __vlan_delete_pvid(pvid, v->vid); |
271 | if (p) { | |
272 | err = __vlan_vid_del(p->dev, p->br, v->vid); | |
bf361ad3 | 273 | if (err) |
2594e906 | 274 | goto out; |
8580e211 | 275 | } |
243a2e63 | 276 | |
2594e906 NA |
277 | if (br_vlan_is_master(v)) { |
278 | if (br_vlan_is_brentry(v)) { | |
279 | v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; | |
280 | br->vlgrp->num_vlans--; | |
281 | } | |
282 | } else { | |
283 | p->vlgrp->num_vlans--; | |
284 | } | |
285 | ||
286 | if (masterv != v) { | |
287 | rhashtable_remove_fast(tbl, &v->vnode, br_vlan_rht_params); | |
288 | __vlan_del_list(v); | |
243a2e63 VY |
289 | kfree_rcu(v, rcu); |
290 | } | |
2594e906 NA |
291 | |
292 | if (atomic_dec_and_test(&masterv->refcnt)) { | |
293 | rhashtable_remove_fast(&masterv->br->vlgrp->vlan_hash, | |
294 | &masterv->vnode, br_vlan_rht_params); | |
295 | __vlan_del_list(masterv); | |
296 | kfree_rcu(masterv, rcu); | |
297 | } | |
298 | out: | |
299 | return err; | |
243a2e63 VY |
300 | } |
301 | ||
2594e906 | 302 | static void __vlan_flush(struct net_bridge_vlan_group *vlgrp, u16 *pvid) |
243a2e63 | 303 | { |
2594e906 NA |
304 | struct net_bridge_vlan *vlan, *tmp; |
305 | ||
306 | __vlan_delete_pvid(pvid, *pvid); | |
307 | list_for_each_entry_safe(vlan, tmp, &vlgrp->vlan_list, vlist) | |
308 | __vlan_del(vlan); | |
309 | rhashtable_destroy(&vlgrp->vlan_hash); | |
310 | kfree(vlgrp); | |
243a2e63 VY |
311 | } |
312 | ||
78851988 | 313 | struct sk_buff *br_handle_vlan(struct net_bridge *br, |
2594e906 | 314 | struct net_bridge_vlan_group *vg, |
78851988 | 315 | struct sk_buff *skb) |
a37b85c9 | 316 | { |
2594e906 | 317 | struct net_bridge_vlan *v; |
a37b85c9 VY |
318 | u16 vid; |
319 | ||
20adfa1a VY |
320 | /* If this packet was not filtered at input, let it pass */ |
321 | if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) | |
78851988 VY |
322 | goto out; |
323 | ||
2594e906 NA |
324 | /* At this point, we know that the frame was filtered and contains |
325 | * a valid vlan id. If the vlan id has untagged flag set, | |
326 | * send untagged; otherwise, send tagged. | |
327 | */ | |
328 | br_vlan_get_tag(skb, &vid); | |
329 | v = br_vlan_find(vg, vid); | |
330 | /* Vlan entry must be configured at this point. The | |
fc92f745 VY |
331 | * only exception is the bridge is set in promisc mode and the |
332 | * packet is destined for the bridge device. In this case | |
333 | * pass the packet as is. | |
334 | */ | |
2594e906 | 335 | if (!v || !br_vlan_should_use(v)) { |
fc92f745 VY |
336 | if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { |
337 | goto out; | |
338 | } else { | |
339 | kfree_skb(skb); | |
340 | return NULL; | |
341 | } | |
342 | } | |
2594e906 | 343 | if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) |
99b192da | 344 | skb->vlan_tci = 0; |
78851988 VY |
345 | |
346 | out: | |
347 | return skb; | |
348 | } | |
349 | ||
350 | /* Called under RCU */ | |
2594e906 NA |
351 | static bool __allowed_ingress(struct rhashtable *tbl, u16 pvid, __be16 proto, |
352 | struct sk_buff *skb, u16 *vid) | |
78851988 | 353 | { |
2594e906 | 354 | const struct net_bridge_vlan *v; |
8580e211 | 355 | bool tagged; |
a37b85c9 | 356 | |
20adfa1a | 357 | BR_INPUT_SKB_CB(skb)->vlan_filtered = true; |
12464bb8 TM |
358 | /* If vlan tx offload is disabled on bridge device and frame was |
359 | * sent from vlan device on the bridge device, it does not have | |
360 | * HW accelerated vlan tag. | |
361 | */ | |
df8a39de | 362 | if (unlikely(!skb_vlan_tag_present(skb) && |
8580e211 | 363 | skb->protocol == proto)) { |
0d5501c1 | 364 | skb = skb_vlan_untag(skb); |
12464bb8 TM |
365 | if (unlikely(!skb)) |
366 | return false; | |
367 | } | |
368 | ||
8580e211 TM |
369 | if (!br_vlan_get_tag(skb, vid)) { |
370 | /* Tagged frame */ | |
371 | if (skb->vlan_proto != proto) { | |
372 | /* Protocol-mismatch, empty out vlan_tci for new tag */ | |
373 | skb_push(skb, ETH_HLEN); | |
62749e2c | 374 | skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, |
df8a39de | 375 | skb_vlan_tag_get(skb)); |
8580e211 TM |
376 | if (unlikely(!skb)) |
377 | return false; | |
378 | ||
379 | skb_pull(skb, ETH_HLEN); | |
380 | skb_reset_mac_len(skb); | |
381 | *vid = 0; | |
382 | tagged = false; | |
383 | } else { | |
384 | tagged = true; | |
385 | } | |
386 | } else { | |
387 | /* Untagged frame */ | |
388 | tagged = false; | |
389 | } | |
390 | ||
b90356ce | 391 | if (!*vid) { |
b90356ce TM |
392 | /* Frame had a tag with VID 0 or did not have a tag. |
393 | * See if pvid is set on this port. That tells us which | |
394 | * vlan untagged or priority-tagged traffic belongs to. | |
78851988 | 395 | */ |
3df6bf45 | 396 | if (!pvid) |
eb707618 | 397 | goto drop; |
78851988 | 398 | |
b90356ce TM |
399 | /* PVID is set on this port. Any untagged or priority-tagged |
400 | * ingress frame is considered to belong to this vlan. | |
78851988 | 401 | */ |
dfb5fa32 | 402 | *vid = pvid; |
8580e211 | 403 | if (likely(!tagged)) |
b90356ce | 404 | /* Untagged Frame. */ |
8580e211 | 405 | __vlan_hwaccel_put_tag(skb, proto, pvid); |
b90356ce TM |
406 | else |
407 | /* Priority-tagged Frame. | |
408 | * At this point, We know that skb->vlan_tci had | |
409 | * VLAN_TAG_PRESENT bit and its VID field was 0x000. | |
410 | * We update only VID field and preserve PCP field. | |
411 | */ | |
412 | skb->vlan_tci |= pvid; | |
413 | ||
78851988 VY |
414 | return true; |
415 | } | |
416 | ||
417 | /* Frame had a valid vlan tag. See if vlan is allowed */ | |
2594e906 NA |
418 | v = br_vlan_lookup(tbl, *vid); |
419 | if (v && br_vlan_should_use(v)) | |
a37b85c9 | 420 | return true; |
eb707618 TM |
421 | drop: |
422 | kfree_skb(skb); | |
a37b85c9 VY |
423 | return false; |
424 | } | |
425 | ||
2594e906 NA |
426 | bool br_allowed_ingress(struct net_bridge *br, struct sk_buff *skb, u16 *vid) |
427 | { | |
428 | /* If VLAN filtering is disabled on the bridge, all packets are | |
429 | * permitted. | |
430 | */ | |
431 | if (!br->vlan_enabled) { | |
432 | BR_INPUT_SKB_CB(skb)->vlan_filtered = false; | |
433 | return true; | |
434 | } | |
435 | ||
436 | return __allowed_ingress(&br->vlgrp->vlan_hash, br->pvid, | |
437 | br->vlan_proto, skb, vid); | |
438 | } | |
439 | ||
440 | bool nbp_allowed_ingress(struct net_bridge_port *p, struct sk_buff *skb, | |
441 | u16 *vid) | |
442 | { | |
443 | struct net_bridge *br = p->br; | |
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 | ||
453 | return __allowed_ingress(&p->vlgrp->vlan_hash, p->pvid, br->vlan_proto, | |
454 | skb, vid); | |
455 | } | |
456 | ||
85f46c6b | 457 | /* Called under RCU. */ |
2594e906 | 458 | bool br_allowed_egress(struct net_bridge_vlan_group *vg, |
85f46c6b VY |
459 | const struct sk_buff *skb) |
460 | { | |
2594e906 | 461 | const struct net_bridge_vlan *v; |
85f46c6b VY |
462 | u16 vid; |
463 | ||
20adfa1a VY |
464 | /* If this packet was not filtered at input, let it pass */ |
465 | if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) | |
85f46c6b VY |
466 | return true; |
467 | ||
85f46c6b | 468 | br_vlan_get_tag(skb, &vid); |
2594e906 NA |
469 | v = br_vlan_find(vg, vid); |
470 | if (v && br_vlan_should_use(v)) | |
85f46c6b VY |
471 | return true; |
472 | ||
473 | return false; | |
474 | } | |
475 | ||
e0d7968a TM |
476 | /* Called under RCU */ |
477 | bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) | |
478 | { | |
468e7944 | 479 | struct net_bridge_vlan_group *vg; |
e0d7968a | 480 | struct net_bridge *br = p->br; |
e0d7968a | 481 | |
20adfa1a | 482 | /* If filtering was disabled at input, let it pass. */ |
c095f248 | 483 | if (!br->vlan_enabled) |
e0d7968a TM |
484 | return true; |
485 | ||
468e7944 NA |
486 | vg = p->vlgrp; |
487 | if (!vg || !vg->num_vlans) | |
e0d7968a TM |
488 | return false; |
489 | ||
8580e211 TM |
490 | if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) |
491 | *vid = 0; | |
492 | ||
e0d7968a | 493 | if (!*vid) { |
2594e906 | 494 | *vid = nbp_get_pvid(p); |
3df6bf45 | 495 | if (!*vid) |
e0d7968a TM |
496 | return false; |
497 | ||
498 | return true; | |
499 | } | |
500 | ||
2594e906 | 501 | if (br_vlan_find(p->vlgrp, *vid)) |
e0d7968a TM |
502 | return true; |
503 | ||
504 | return false; | |
505 | } | |
506 | ||
8adff41c TM |
507 | /* Must be protected by RTNL. |
508 | * Must be called with vid in range from 1 to 4094 inclusive. | |
509 | */ | |
552406c4 | 510 | int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) |
243a2e63 | 511 | { |
2594e906 NA |
512 | struct net_bridge_vlan *vlan; |
513 | int ret; | |
243a2e63 VY |
514 | |
515 | ASSERT_RTNL(); | |
516 | ||
2594e906 NA |
517 | vlan = br_vlan_find(br->vlgrp, vid); |
518 | if (vlan) { | |
519 | if (!br_vlan_is_brentry(vlan)) { | |
520 | /* Trying to change flags of non-existent bridge vlan */ | |
521 | if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) | |
522 | return -EINVAL; | |
523 | /* It was only kept for port vlans, now make it real */ | |
524 | ret = br_fdb_insert(br, NULL, br->dev->dev_addr, | |
525 | vlan->vid); | |
526 | if (ret) { | |
527 | br_err(br, "failed insert local address into bridge forwarding table\n"); | |
528 | return ret; | |
529 | } | |
530 | atomic_inc(&vlan->refcnt); | |
531 | vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; | |
532 | br->vlgrp->num_vlans++; | |
533 | } | |
534 | __vlan_add_flags(vlan, flags); | |
535 | return 0; | |
536 | } | |
243a2e63 | 537 | |
2594e906 NA |
538 | vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
539 | if (!vlan) | |
243a2e63 VY |
540 | return -ENOMEM; |
541 | ||
2594e906 NA |
542 | vlan->vid = vid; |
543 | vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; | |
544 | vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; | |
545 | vlan->br = br; | |
546 | if (flags & BRIDGE_VLAN_INFO_BRENTRY) | |
547 | atomic_set(&vlan->refcnt, 1); | |
548 | ret = __vlan_add(vlan, flags); | |
549 | if (ret) | |
550 | kfree(vlan); | |
243a2e63 | 551 | |
2594e906 | 552 | return ret; |
243a2e63 VY |
553 | } |
554 | ||
8adff41c TM |
555 | /* Must be protected by RTNL. |
556 | * Must be called with vid in range from 1 to 4094 inclusive. | |
557 | */ | |
243a2e63 VY |
558 | int br_vlan_delete(struct net_bridge *br, u16 vid) |
559 | { | |
2594e906 | 560 | struct net_bridge_vlan *v; |
243a2e63 VY |
561 | |
562 | ASSERT_RTNL(); | |
563 | ||
2594e906 NA |
564 | v = br_vlan_find(br->vlgrp, vid); |
565 | if (!v || !br_vlan_is_brentry(v)) | |
566 | return -ENOENT; | |
243a2e63 | 567 | |
424bb9c9 | 568 | br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); |
bc9a25d2 | 569 | |
2594e906 | 570 | return __vlan_del(v); |
243a2e63 VY |
571 | } |
572 | ||
573 | void br_vlan_flush(struct net_bridge *br) | |
574 | { | |
243a2e63 | 575 | ASSERT_RTNL(); |
243a2e63 | 576 | |
2594e906 | 577 | __vlan_flush(br_vlan_group(br), &br->pvid); |
243a2e63 VY |
578 | } |
579 | ||
2594e906 | 580 | struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) |
2b292fb4 | 581 | { |
2594e906 NA |
582 | if (!vg) |
583 | return NULL; | |
2b292fb4 | 584 | |
2594e906 | 585 | return br_vlan_lookup(&vg->vlan_hash, vid); |
2b292fb4 TM |
586 | } |
587 | ||
204177f3 TM |
588 | /* Must be protected by RTNL. */ |
589 | static void recalculate_group_addr(struct net_bridge *br) | |
590 | { | |
591 | if (br->group_addr_set) | |
592 | return; | |
593 | ||
594 | spin_lock_bh(&br->lock); | |
595 | if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) { | |
596 | /* Bridge Group Address */ | |
597 | br->group_addr[5] = 0x00; | |
598 | } else { /* vlan_enabled && ETH_P_8021AD */ | |
599 | /* Provider Bridge Group Address */ | |
600 | br->group_addr[5] = 0x08; | |
601 | } | |
602 | spin_unlock_bh(&br->lock); | |
603 | } | |
604 | ||
605 | /* Must be protected by RTNL. */ | |
606 | void br_recalculate_fwd_mask(struct net_bridge *br) | |
607 | { | |
608 | if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) | |
609 | br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; | |
610 | else /* vlan_enabled && ETH_P_8021AD */ | |
611 | br->group_fwd_mask_required = BR_GROUPFWD_8021AD & | |
612 | ~(1u << br->group_addr[5]); | |
613 | } | |
614 | ||
a7854037 | 615 | int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) |
243a2e63 | 616 | { |
243a2e63 | 617 | if (br->vlan_enabled == val) |
a7854037 | 618 | return 0; |
243a2e63 VY |
619 | |
620 | br->vlan_enabled = val; | |
2796d0c6 | 621 | br_manage_promisc(br); |
204177f3 TM |
622 | recalculate_group_addr(br); |
623 | br_recalculate_fwd_mask(br); | |
243a2e63 | 624 | |
a7854037 NA |
625 | return 0; |
626 | } | |
627 | ||
628 | int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) | |
629 | { | |
630 | if (!rtnl_trylock()) | |
631 | return restart_syscall(); | |
632 | ||
633 | __br_vlan_filter_toggle(br, val); | |
243a2e63 | 634 | rtnl_unlock(); |
a7854037 | 635 | |
243a2e63 VY |
636 | return 0; |
637 | } | |
638 | ||
d2d427b3 | 639 | int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) |
204177f3 TM |
640 | { |
641 | int err = 0; | |
642 | struct net_bridge_port *p; | |
2594e906 | 643 | struct net_bridge_vlan *vlan; |
d2d427b3 | 644 | __be16 oldproto; |
204177f3 | 645 | |
204177f3 | 646 | if (br->vlan_proto == proto) |
d2d427b3 | 647 | return 0; |
204177f3 TM |
648 | |
649 | /* Add VLANs for the new proto to the device filter. */ | |
650 | list_for_each_entry(p, &br->port_list, list) { | |
2594e906 NA |
651 | list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) { |
652 | err = vlan_vid_add(p->dev, proto, vlan->vid); | |
204177f3 TM |
653 | if (err) |
654 | goto err_filt; | |
655 | } | |
656 | } | |
657 | ||
658 | oldproto = br->vlan_proto; | |
659 | br->vlan_proto = proto; | |
660 | ||
661 | recalculate_group_addr(br); | |
662 | br_recalculate_fwd_mask(br); | |
663 | ||
664 | /* Delete VLANs for the old proto from the device filter. */ | |
2594e906 NA |
665 | list_for_each_entry(p, &br->port_list, list) |
666 | list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) | |
667 | vlan_vid_del(p->dev, oldproto, vlan->vid); | |
204177f3 | 668 | |
d2d427b3 | 669 | return 0; |
204177f3 TM |
670 | |
671 | err_filt: | |
2594e906 NA |
672 | list_for_each_entry_continue_reverse(vlan, &p->vlgrp->vlan_list, vlist) |
673 | vlan_vid_del(p->dev, proto, vlan->vid); | |
204177f3 | 674 | |
2594e906 NA |
675 | list_for_each_entry_continue_reverse(p, &br->port_list, list) |
676 | list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) | |
677 | vlan_vid_del(p->dev, proto, vlan->vid); | |
204177f3 | 678 | |
d2d427b3 TM |
679 | return err; |
680 | } | |
681 | ||
682 | int br_vlan_set_proto(struct net_bridge *br, unsigned long val) | |
683 | { | |
684 | int err; | |
685 | ||
686 | if (val != ETH_P_8021Q && val != ETH_P_8021AD) | |
687 | return -EPROTONOSUPPORT; | |
688 | ||
689 | if (!rtnl_trylock()) | |
690 | return restart_syscall(); | |
691 | ||
692 | err = __br_vlan_set_proto(br, htons(val)); | |
693 | rtnl_unlock(); | |
694 | ||
695 | return err; | |
204177f3 TM |
696 | } |
697 | ||
2594e906 NA |
698 | static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 pvid, |
699 | u16 vid) | |
5be5a2df | 700 | { |
2594e906 NA |
701 | struct net_bridge_vlan *v; |
702 | ||
703 | if (vid != pvid) | |
704 | return false; | |
705 | ||
706 | v = br_vlan_lookup(&vg->vlan_hash, vid); | |
707 | if (v && br_vlan_should_use(v) && | |
708 | (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) | |
709 | return true; | |
710 | ||
711 | return false; | |
5be5a2df VY |
712 | } |
713 | ||
714 | static void br_vlan_disable_default_pvid(struct net_bridge *br) | |
715 | { | |
716 | struct net_bridge_port *p; | |
717 | u16 pvid = br->default_pvid; | |
718 | ||
719 | /* Disable default_pvid on all ports where it is still | |
720 | * configured. | |
721 | */ | |
2594e906 | 722 | if (vlan_default_pvid(br->vlgrp, br->pvid, pvid)) |
5be5a2df VY |
723 | br_vlan_delete(br, pvid); |
724 | ||
725 | list_for_each_entry(p, &br->port_list, list) { | |
2594e906 | 726 | if (vlan_default_pvid(p->vlgrp, p->pvid, pvid)) |
5be5a2df VY |
727 | nbp_vlan_delete(p, pvid); |
728 | } | |
729 | ||
730 | br->default_pvid = 0; | |
731 | } | |
732 | ||
733 | static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid) | |
734 | { | |
2594e906 | 735 | const struct net_bridge_vlan *pvent; |
5be5a2df VY |
736 | struct net_bridge_port *p; |
737 | u16 old_pvid; | |
738 | int err = 0; | |
739 | unsigned long *changed; | |
740 | ||
741 | changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), | |
742 | GFP_KERNEL); | |
743 | if (!changed) | |
744 | return -ENOMEM; | |
745 | ||
746 | old_pvid = br->default_pvid; | |
747 | ||
748 | /* Update default_pvid config only if we do not conflict with | |
749 | * user configuration. | |
750 | */ | |
2594e906 NA |
751 | pvent = br_vlan_find(br->vlgrp, pvid); |
752 | if ((!old_pvid || vlan_default_pvid(br->vlgrp, br->pvid, old_pvid)) && | |
753 | (!pvent || !br_vlan_should_use(pvent))) { | |
5be5a2df VY |
754 | err = br_vlan_add(br, pvid, |
755 | BRIDGE_VLAN_INFO_PVID | | |
2594e906 NA |
756 | BRIDGE_VLAN_INFO_UNTAGGED | |
757 | BRIDGE_VLAN_INFO_BRENTRY); | |
5be5a2df VY |
758 | if (err) |
759 | goto out; | |
760 | br_vlan_delete(br, old_pvid); | |
761 | set_bit(0, changed); | |
762 | } | |
763 | ||
764 | list_for_each_entry(p, &br->port_list, list) { | |
765 | /* Update default_pvid config only if we do not conflict with | |
766 | * user configuration. | |
767 | */ | |
768 | if ((old_pvid && | |
2594e906 NA |
769 | !vlan_default_pvid(p->vlgrp, p->pvid, old_pvid)) || |
770 | br_vlan_find(p->vlgrp, pvid)) | |
5be5a2df VY |
771 | continue; |
772 | ||
773 | err = nbp_vlan_add(p, pvid, | |
774 | BRIDGE_VLAN_INFO_PVID | | |
775 | BRIDGE_VLAN_INFO_UNTAGGED); | |
776 | if (err) | |
777 | goto err_port; | |
778 | nbp_vlan_delete(p, old_pvid); | |
779 | set_bit(p->port_no, changed); | |
780 | } | |
781 | ||
782 | br->default_pvid = pvid; | |
783 | ||
784 | out: | |
785 | kfree(changed); | |
786 | return err; | |
787 | ||
788 | err_port: | |
789 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { | |
790 | if (!test_bit(p->port_no, changed)) | |
791 | continue; | |
792 | ||
793 | if (old_pvid) | |
794 | nbp_vlan_add(p, old_pvid, | |
795 | BRIDGE_VLAN_INFO_PVID | | |
796 | BRIDGE_VLAN_INFO_UNTAGGED); | |
797 | nbp_vlan_delete(p, pvid); | |
798 | } | |
799 | ||
800 | if (test_bit(0, changed)) { | |
801 | if (old_pvid) | |
802 | br_vlan_add(br, old_pvid, | |
803 | BRIDGE_VLAN_INFO_PVID | | |
2594e906 NA |
804 | BRIDGE_VLAN_INFO_UNTAGGED | |
805 | BRIDGE_VLAN_INFO_BRENTRY); | |
5be5a2df VY |
806 | br_vlan_delete(br, pvid); |
807 | } | |
808 | goto out; | |
809 | } | |
810 | ||
96a20d9d VY |
811 | int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) |
812 | { | |
813 | u16 pvid = val; | |
814 | int err = 0; | |
815 | ||
5be5a2df | 816 | if (val >= VLAN_VID_MASK) |
96a20d9d VY |
817 | return -EINVAL; |
818 | ||
819 | if (!rtnl_trylock()) | |
820 | return restart_syscall(); | |
821 | ||
822 | if (pvid == br->default_pvid) | |
823 | goto unlock; | |
824 | ||
825 | /* Only allow default pvid change when filtering is disabled */ | |
826 | if (br->vlan_enabled) { | |
827 | pr_info_once("Please disable vlan filtering to change default_pvid\n"); | |
828 | err = -EPERM; | |
829 | goto unlock; | |
830 | } | |
831 | ||
5be5a2df VY |
832 | if (!pvid) |
833 | br_vlan_disable_default_pvid(br); | |
834 | else | |
835 | err = __br_vlan_set_default_pvid(br, pvid); | |
96a20d9d VY |
836 | |
837 | unlock: | |
838 | rtnl_unlock(); | |
839 | return err; | |
840 | } | |
841 | ||
5be5a2df | 842 | int br_vlan_init(struct net_bridge *br) |
8580e211 | 843 | { |
2594e906 NA |
844 | int ret = -ENOMEM; |
845 | ||
846 | br->vlgrp = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); | |
847 | if (!br->vlgrp) | |
848 | goto out; | |
849 | ret = rhashtable_init(&br->vlgrp->vlan_hash, &br_vlan_rht_params); | |
850 | if (ret) | |
851 | goto err_rhtbl; | |
852 | INIT_LIST_HEAD(&br->vlgrp->vlan_list); | |
8580e211 | 853 | br->vlan_proto = htons(ETH_P_8021Q); |
96a20d9d | 854 | br->default_pvid = 1; |
2594e906 NA |
855 | ret = br_vlan_add(br, 1, |
856 | BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | | |
857 | BRIDGE_VLAN_INFO_BRENTRY); | |
858 | if (ret) | |
859 | goto err_vlan_add; | |
860 | ||
861 | out: | |
862 | return ret; | |
863 | ||
864 | err_vlan_add: | |
865 | rhashtable_destroy(&br->vlgrp->vlan_hash); | |
866 | err_rhtbl: | |
867 | kfree(br->vlgrp); | |
868 | ||
869 | goto out; | |
870 | } | |
871 | ||
872 | int nbp_vlan_init(struct net_bridge_port *p) | |
873 | { | |
874 | int ret = -ENOMEM; | |
875 | ||
876 | p->vlgrp = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); | |
877 | if (!p->vlgrp) | |
878 | goto out; | |
879 | ||
880 | ret = rhashtable_init(&p->vlgrp->vlan_hash, &br_vlan_rht_params); | |
881 | if (ret) | |
882 | goto err_rhtbl; | |
883 | INIT_LIST_HEAD(&p->vlgrp->vlan_list); | |
884 | if (p->br->default_pvid) { | |
885 | ret = nbp_vlan_add(p, p->br->default_pvid, | |
886 | BRIDGE_VLAN_INFO_PVID | | |
887 | BRIDGE_VLAN_INFO_UNTAGGED); | |
888 | if (ret) | |
889 | goto err_vlan_add; | |
890 | } | |
891 | out: | |
892 | return ret; | |
893 | ||
894 | err_vlan_add: | |
895 | rhashtable_destroy(&p->vlgrp->vlan_hash); | |
896 | err_rhtbl: | |
897 | kfree(p->vlgrp); | |
898 | ||
899 | goto out; | |
8580e211 TM |
900 | } |
901 | ||
8adff41c TM |
902 | /* Must be protected by RTNL. |
903 | * Must be called with vid in range from 1 to 4094 inclusive. | |
904 | */ | |
552406c4 | 905 | int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) |
243a2e63 | 906 | { |
2594e906 NA |
907 | struct net_bridge_vlan *vlan; |
908 | int ret; | |
243a2e63 VY |
909 | |
910 | ASSERT_RTNL(); | |
911 | ||
2594e906 NA |
912 | vlan = br_vlan_find(port->vlgrp, vid); |
913 | if (vlan) { | |
914 | __vlan_add_flags(vlan, flags); | |
915 | return 0; | |
243a2e63 VY |
916 | } |
917 | ||
2594e906 NA |
918 | vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
919 | if (!vlan) | |
920 | return -ENOMEM; | |
243a2e63 | 921 | |
2594e906 NA |
922 | vlan->vid = vid; |
923 | vlan->port = port; | |
924 | ret = __vlan_add(vlan, flags); | |
925 | if (ret) | |
926 | kfree(vlan); | |
243a2e63 | 927 | |
2594e906 | 928 | return ret; |
243a2e63 VY |
929 | } |
930 | ||
8adff41c TM |
931 | /* Must be protected by RTNL. |
932 | * Must be called with vid in range from 1 to 4094 inclusive. | |
933 | */ | |
243a2e63 VY |
934 | int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) |
935 | { | |
2594e906 | 936 | struct net_bridge_vlan *v; |
243a2e63 VY |
937 | |
938 | ASSERT_RTNL(); | |
939 | ||
2594e906 NA |
940 | v = br_vlan_find(port->vlgrp, vid); |
941 | if (!v) | |
942 | return -ENOENT; | |
424bb9c9 | 943 | br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); |
1ea2d020 | 944 | br_fdb_delete_by_port(port->br, port, vid, 0); |
bc9a25d2 | 945 | |
2594e906 | 946 | return __vlan_del(v); |
243a2e63 VY |
947 | } |
948 | ||
949 | void nbp_vlan_flush(struct net_bridge_port *port) | |
950 | { | |
2594e906 | 951 | struct net_bridge_vlan *vlan; |
243a2e63 VY |
952 | |
953 | ASSERT_RTNL(); | |
954 | ||
2594e906 NA |
955 | list_for_each_entry(vlan, &port->vlgrp->vlan_list, vlist) |
956 | vlan_vid_del(port->dev, port->br->vlan_proto, vlan->vid); | |
bc9a25d2 | 957 | |
2594e906 | 958 | __vlan_flush(nbp_vlan_group(port), &port->pvid); |
5be5a2df | 959 | } |