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)) | |
57 | vg = v->br->vlgrp; | |
58 | else | |
59 | vg = v->port->vlgrp; | |
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 | { | |
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; | |
77751ee8 | 252 | struct net_bridge_vlan_group *vg; |
2594e906 NA |
253 | struct net_bridge_port *p = NULL; |
254 | struct net_bridge *br; | |
255 | int err = 0; | |
552406c4 | 256 | |
2594e906 NA |
257 | if (br_vlan_is_master(v)) { |
258 | br = v->br; | |
77751ee8 | 259 | vg = v->br->vlgrp; |
2594e906 NA |
260 | } else { |
261 | p = v->port; | |
262 | br = p->br; | |
77751ee8 | 263 | vg = v->port->vlgrp; |
2594e906 | 264 | masterv = v->brvlan; |
2594e906 | 265 | } |
bf361ad3 | 266 | |
77751ee8 | 267 | __vlan_delete_pvid(vg, v->vid); |
2594e906 NA |
268 | if (p) { |
269 | err = __vlan_vid_del(p->dev, p->br, v->vid); | |
bf361ad3 | 270 | if (err) |
2594e906 | 271 | goto out; |
8580e211 | 272 | } |
243a2e63 | 273 | |
2594e906 NA |
274 | if (br_vlan_is_master(v)) { |
275 | if (br_vlan_is_brentry(v)) { | |
276 | v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; | |
277 | br->vlgrp->num_vlans--; | |
278 | } | |
279 | } else { | |
280 | p->vlgrp->num_vlans--; | |
281 | } | |
282 | ||
283 | if (masterv != v) { | |
77751ee8 NA |
284 | rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, |
285 | br_vlan_rht_params); | |
2594e906 | 286 | __vlan_del_list(v); |
243a2e63 VY |
287 | kfree_rcu(v, rcu); |
288 | } | |
2594e906 NA |
289 | |
290 | if (atomic_dec_and_test(&masterv->refcnt)) { | |
291 | rhashtable_remove_fast(&masterv->br->vlgrp->vlan_hash, | |
292 | &masterv->vnode, br_vlan_rht_params); | |
293 | __vlan_del_list(masterv); | |
294 | kfree_rcu(masterv, rcu); | |
295 | } | |
296 | out: | |
297 | return err; | |
243a2e63 VY |
298 | } |
299 | ||
77751ee8 | 300 | static void __vlan_flush(struct net_bridge_vlan_group *vlgrp) |
243a2e63 | 301 | { |
2594e906 NA |
302 | struct net_bridge_vlan *vlan, *tmp; |
303 | ||
77751ee8 | 304 | __vlan_delete_pvid(vlgrp, vlgrp->pvid); |
2594e906 NA |
305 | list_for_each_entry_safe(vlan, tmp, &vlgrp->vlan_list, vlist) |
306 | __vlan_del(vlan); | |
307 | rhashtable_destroy(&vlgrp->vlan_hash); | |
308 | kfree(vlgrp); | |
243a2e63 VY |
309 | } |
310 | ||
78851988 | 311 | struct sk_buff *br_handle_vlan(struct net_bridge *br, |
2594e906 | 312 | struct net_bridge_vlan_group *vg, |
78851988 | 313 | struct sk_buff *skb) |
a37b85c9 | 314 | { |
2594e906 | 315 | struct net_bridge_vlan *v; |
a37b85c9 VY |
316 | u16 vid; |
317 | ||
20adfa1a VY |
318 | /* If this packet was not filtered at input, let it pass */ |
319 | if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) | |
78851988 VY |
320 | goto out; |
321 | ||
2594e906 NA |
322 | /* At this point, we know that the frame was filtered and contains |
323 | * a valid vlan id. If the vlan id has untagged flag set, | |
324 | * send untagged; otherwise, send tagged. | |
325 | */ | |
326 | br_vlan_get_tag(skb, &vid); | |
327 | v = br_vlan_find(vg, vid); | |
328 | /* Vlan entry must be configured at this point. The | |
fc92f745 VY |
329 | * only exception is the bridge is set in promisc mode and the |
330 | * packet is destined for the bridge device. In this case | |
331 | * pass the packet as is. | |
332 | */ | |
2594e906 | 333 | if (!v || !br_vlan_should_use(v)) { |
fc92f745 VY |
334 | if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { |
335 | goto out; | |
336 | } else { | |
337 | kfree_skb(skb); | |
338 | return NULL; | |
339 | } | |
340 | } | |
2594e906 | 341 | if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) |
99b192da | 342 | skb->vlan_tci = 0; |
78851988 VY |
343 | |
344 | out: | |
345 | return skb; | |
346 | } | |
347 | ||
348 | /* Called under RCU */ | |
77751ee8 | 349 | static bool __allowed_ingress(struct net_bridge_vlan_group *vg, __be16 proto, |
2594e906 | 350 | struct sk_buff *skb, u16 *vid) |
78851988 | 351 | { |
2594e906 | 352 | const struct net_bridge_vlan *v; |
8580e211 | 353 | bool tagged; |
a37b85c9 | 354 | |
20adfa1a | 355 | BR_INPUT_SKB_CB(skb)->vlan_filtered = true; |
12464bb8 TM |
356 | /* If vlan tx offload is disabled on bridge device and frame was |
357 | * sent from vlan device on the bridge device, it does not have | |
358 | * HW accelerated vlan tag. | |
359 | */ | |
df8a39de | 360 | if (unlikely(!skb_vlan_tag_present(skb) && |
8580e211 | 361 | skb->protocol == proto)) { |
0d5501c1 | 362 | skb = skb_vlan_untag(skb); |
12464bb8 TM |
363 | if (unlikely(!skb)) |
364 | return false; | |
365 | } | |
366 | ||
8580e211 TM |
367 | if (!br_vlan_get_tag(skb, vid)) { |
368 | /* Tagged frame */ | |
369 | if (skb->vlan_proto != proto) { | |
370 | /* Protocol-mismatch, empty out vlan_tci for new tag */ | |
371 | skb_push(skb, ETH_HLEN); | |
62749e2c | 372 | skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, |
df8a39de | 373 | skb_vlan_tag_get(skb)); |
8580e211 TM |
374 | if (unlikely(!skb)) |
375 | return false; | |
376 | ||
377 | skb_pull(skb, ETH_HLEN); | |
378 | skb_reset_mac_len(skb); | |
379 | *vid = 0; | |
380 | tagged = false; | |
381 | } else { | |
382 | tagged = true; | |
383 | } | |
384 | } else { | |
385 | /* Untagged frame */ | |
386 | tagged = false; | |
387 | } | |
388 | ||
b90356ce | 389 | if (!*vid) { |
77751ee8 NA |
390 | u16 pvid = br_get_pvid(vg); |
391 | ||
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 */ | |
77751ee8 | 418 | v = br_vlan_find(vg, *vid); |
2594e906 | 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 | ||
77751ee8 NA |
426 | bool br_allowed_ingress(const struct net_bridge *br, |
427 | struct net_bridge_vlan_group *vg, struct sk_buff *skb, | |
428 | u16 *vid) | |
2594e906 NA |
429 | { |
430 | /* If VLAN filtering is disabled on the bridge, all packets are | |
431 | * permitted. | |
432 | */ | |
433 | if (!br->vlan_enabled) { | |
434 | BR_INPUT_SKB_CB(skb)->vlan_filtered = false; | |
435 | return true; | |
436 | } | |
437 | ||
77751ee8 | 438 | return __allowed_ingress(vg, br->vlan_proto, skb, vid); |
2594e906 NA |
439 | } |
440 | ||
85f46c6b | 441 | /* Called under RCU. */ |
2594e906 | 442 | bool br_allowed_egress(struct net_bridge_vlan_group *vg, |
85f46c6b VY |
443 | const struct sk_buff *skb) |
444 | { | |
2594e906 | 445 | const struct net_bridge_vlan *v; |
85f46c6b VY |
446 | u16 vid; |
447 | ||
20adfa1a VY |
448 | /* If this packet was not filtered at input, let it pass */ |
449 | if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) | |
85f46c6b VY |
450 | return true; |
451 | ||
85f46c6b | 452 | br_vlan_get_tag(skb, &vid); |
2594e906 NA |
453 | v = br_vlan_find(vg, vid); |
454 | if (v && br_vlan_should_use(v)) | |
85f46c6b VY |
455 | return true; |
456 | ||
457 | return false; | |
458 | } | |
459 | ||
e0d7968a TM |
460 | /* Called under RCU */ |
461 | bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) | |
462 | { | |
468e7944 | 463 | struct net_bridge_vlan_group *vg; |
e0d7968a | 464 | struct net_bridge *br = p->br; |
e0d7968a | 465 | |
20adfa1a | 466 | /* If filtering was disabled at input, let it pass. */ |
c095f248 | 467 | if (!br->vlan_enabled) |
e0d7968a TM |
468 | return true; |
469 | ||
468e7944 NA |
470 | vg = p->vlgrp; |
471 | if (!vg || !vg->num_vlans) | |
e0d7968a TM |
472 | return false; |
473 | ||
8580e211 TM |
474 | if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) |
475 | *vid = 0; | |
476 | ||
e0d7968a | 477 | if (!*vid) { |
77751ee8 | 478 | *vid = br_get_pvid(vg); |
3df6bf45 | 479 | if (!*vid) |
e0d7968a TM |
480 | return false; |
481 | ||
482 | return true; | |
483 | } | |
484 | ||
77751ee8 | 485 | if (br_vlan_find(vg, *vid)) |
e0d7968a TM |
486 | return true; |
487 | ||
488 | return false; | |
489 | } | |
490 | ||
8adff41c TM |
491 | /* Must be protected by RTNL. |
492 | * Must be called with vid in range from 1 to 4094 inclusive. | |
493 | */ | |
552406c4 | 494 | int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) |
243a2e63 | 495 | { |
2594e906 NA |
496 | struct net_bridge_vlan *vlan; |
497 | int ret; | |
243a2e63 VY |
498 | |
499 | ASSERT_RTNL(); | |
500 | ||
2594e906 NA |
501 | vlan = br_vlan_find(br->vlgrp, vid); |
502 | if (vlan) { | |
503 | if (!br_vlan_is_brentry(vlan)) { | |
504 | /* Trying to change flags of non-existent bridge vlan */ | |
505 | if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) | |
506 | return -EINVAL; | |
507 | /* It was only kept for port vlans, now make it real */ | |
508 | ret = br_fdb_insert(br, NULL, br->dev->dev_addr, | |
509 | vlan->vid); | |
510 | if (ret) { | |
511 | br_err(br, "failed insert local address into bridge forwarding table\n"); | |
512 | return ret; | |
513 | } | |
514 | atomic_inc(&vlan->refcnt); | |
515 | vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; | |
516 | br->vlgrp->num_vlans++; | |
517 | } | |
518 | __vlan_add_flags(vlan, flags); | |
519 | return 0; | |
520 | } | |
243a2e63 | 521 | |
2594e906 NA |
522 | vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
523 | if (!vlan) | |
243a2e63 VY |
524 | return -ENOMEM; |
525 | ||
2594e906 NA |
526 | vlan->vid = vid; |
527 | vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; | |
528 | vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; | |
529 | vlan->br = br; | |
530 | if (flags & BRIDGE_VLAN_INFO_BRENTRY) | |
531 | atomic_set(&vlan->refcnt, 1); | |
532 | ret = __vlan_add(vlan, flags); | |
533 | if (ret) | |
534 | kfree(vlan); | |
243a2e63 | 535 | |
2594e906 | 536 | return ret; |
243a2e63 VY |
537 | } |
538 | ||
8adff41c TM |
539 | /* Must be protected by RTNL. |
540 | * Must be called with vid in range from 1 to 4094 inclusive. | |
541 | */ | |
243a2e63 VY |
542 | int br_vlan_delete(struct net_bridge *br, u16 vid) |
543 | { | |
2594e906 | 544 | struct net_bridge_vlan *v; |
243a2e63 VY |
545 | |
546 | ASSERT_RTNL(); | |
547 | ||
2594e906 NA |
548 | v = br_vlan_find(br->vlgrp, vid); |
549 | if (!v || !br_vlan_is_brentry(v)) | |
550 | return -ENOENT; | |
243a2e63 | 551 | |
424bb9c9 | 552 | br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); |
bc9a25d2 | 553 | |
2594e906 | 554 | return __vlan_del(v); |
243a2e63 VY |
555 | } |
556 | ||
557 | void br_vlan_flush(struct net_bridge *br) | |
558 | { | |
243a2e63 | 559 | ASSERT_RTNL(); |
243a2e63 | 560 | |
77751ee8 | 561 | __vlan_flush(br_vlan_group(br)); |
243a2e63 VY |
562 | } |
563 | ||
2594e906 | 564 | struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) |
2b292fb4 | 565 | { |
2594e906 NA |
566 | if (!vg) |
567 | return NULL; | |
2b292fb4 | 568 | |
2594e906 | 569 | return br_vlan_lookup(&vg->vlan_hash, vid); |
2b292fb4 TM |
570 | } |
571 | ||
204177f3 TM |
572 | /* Must be protected by RTNL. */ |
573 | static void recalculate_group_addr(struct net_bridge *br) | |
574 | { | |
575 | if (br->group_addr_set) | |
576 | return; | |
577 | ||
578 | spin_lock_bh(&br->lock); | |
579 | if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) { | |
580 | /* Bridge Group Address */ | |
581 | br->group_addr[5] = 0x00; | |
582 | } else { /* vlan_enabled && ETH_P_8021AD */ | |
583 | /* Provider Bridge Group Address */ | |
584 | br->group_addr[5] = 0x08; | |
585 | } | |
586 | spin_unlock_bh(&br->lock); | |
587 | } | |
588 | ||
589 | /* Must be protected by RTNL. */ | |
590 | void br_recalculate_fwd_mask(struct net_bridge *br) | |
591 | { | |
592 | if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) | |
593 | br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; | |
594 | else /* vlan_enabled && ETH_P_8021AD */ | |
595 | br->group_fwd_mask_required = BR_GROUPFWD_8021AD & | |
596 | ~(1u << br->group_addr[5]); | |
597 | } | |
598 | ||
a7854037 | 599 | int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) |
243a2e63 | 600 | { |
243a2e63 | 601 | if (br->vlan_enabled == val) |
a7854037 | 602 | return 0; |
243a2e63 VY |
603 | |
604 | br->vlan_enabled = val; | |
2796d0c6 | 605 | br_manage_promisc(br); |
204177f3 TM |
606 | recalculate_group_addr(br); |
607 | br_recalculate_fwd_mask(br); | |
243a2e63 | 608 | |
a7854037 NA |
609 | return 0; |
610 | } | |
611 | ||
612 | int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) | |
613 | { | |
614 | if (!rtnl_trylock()) | |
615 | return restart_syscall(); | |
616 | ||
617 | __br_vlan_filter_toggle(br, val); | |
243a2e63 | 618 | rtnl_unlock(); |
a7854037 | 619 | |
243a2e63 VY |
620 | return 0; |
621 | } | |
622 | ||
d2d427b3 | 623 | int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) |
204177f3 TM |
624 | { |
625 | int err = 0; | |
626 | struct net_bridge_port *p; | |
2594e906 | 627 | struct net_bridge_vlan *vlan; |
d2d427b3 | 628 | __be16 oldproto; |
204177f3 | 629 | |
204177f3 | 630 | if (br->vlan_proto == proto) |
d2d427b3 | 631 | return 0; |
204177f3 TM |
632 | |
633 | /* Add VLANs for the new proto to the device filter. */ | |
634 | list_for_each_entry(p, &br->port_list, list) { | |
2594e906 NA |
635 | list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) { |
636 | err = vlan_vid_add(p->dev, proto, vlan->vid); | |
204177f3 TM |
637 | if (err) |
638 | goto err_filt; | |
639 | } | |
640 | } | |
641 | ||
642 | oldproto = br->vlan_proto; | |
643 | br->vlan_proto = proto; | |
644 | ||
645 | recalculate_group_addr(br); | |
646 | br_recalculate_fwd_mask(br); | |
647 | ||
648 | /* Delete VLANs for the old proto from the device filter. */ | |
2594e906 NA |
649 | list_for_each_entry(p, &br->port_list, list) |
650 | list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) | |
651 | vlan_vid_del(p->dev, oldproto, vlan->vid); | |
204177f3 | 652 | |
d2d427b3 | 653 | return 0; |
204177f3 TM |
654 | |
655 | err_filt: | |
2594e906 NA |
656 | list_for_each_entry_continue_reverse(vlan, &p->vlgrp->vlan_list, vlist) |
657 | vlan_vid_del(p->dev, proto, vlan->vid); | |
204177f3 | 658 | |
2594e906 NA |
659 | list_for_each_entry_continue_reverse(p, &br->port_list, list) |
660 | list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) | |
661 | vlan_vid_del(p->dev, proto, vlan->vid); | |
204177f3 | 662 | |
d2d427b3 TM |
663 | return err; |
664 | } | |
665 | ||
666 | int br_vlan_set_proto(struct net_bridge *br, unsigned long val) | |
667 | { | |
668 | int err; | |
669 | ||
670 | if (val != ETH_P_8021Q && val != ETH_P_8021AD) | |
671 | return -EPROTONOSUPPORT; | |
672 | ||
673 | if (!rtnl_trylock()) | |
674 | return restart_syscall(); | |
675 | ||
676 | err = __br_vlan_set_proto(br, htons(val)); | |
677 | rtnl_unlock(); | |
678 | ||
679 | return err; | |
204177f3 TM |
680 | } |
681 | ||
77751ee8 | 682 | static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) |
5be5a2df | 683 | { |
2594e906 NA |
684 | struct net_bridge_vlan *v; |
685 | ||
77751ee8 | 686 | if (vid != vg->pvid) |
2594e906 NA |
687 | return false; |
688 | ||
689 | v = br_vlan_lookup(&vg->vlan_hash, vid); | |
690 | if (v && br_vlan_should_use(v) && | |
691 | (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) | |
692 | return true; | |
693 | ||
694 | return false; | |
5be5a2df VY |
695 | } |
696 | ||
697 | static void br_vlan_disable_default_pvid(struct net_bridge *br) | |
698 | { | |
699 | struct net_bridge_port *p; | |
700 | u16 pvid = br->default_pvid; | |
701 | ||
702 | /* Disable default_pvid on all ports where it is still | |
703 | * configured. | |
704 | */ | |
77751ee8 | 705 | if (vlan_default_pvid(br->vlgrp, pvid)) |
5be5a2df VY |
706 | br_vlan_delete(br, pvid); |
707 | ||
708 | list_for_each_entry(p, &br->port_list, list) { | |
77751ee8 | 709 | if (vlan_default_pvid(p->vlgrp, pvid)) |
5be5a2df VY |
710 | nbp_vlan_delete(p, pvid); |
711 | } | |
712 | ||
713 | br->default_pvid = 0; | |
714 | } | |
715 | ||
716 | static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid) | |
717 | { | |
2594e906 | 718 | const struct net_bridge_vlan *pvent; |
5be5a2df VY |
719 | struct net_bridge_port *p; |
720 | u16 old_pvid; | |
721 | int err = 0; | |
722 | unsigned long *changed; | |
723 | ||
724 | changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), | |
725 | GFP_KERNEL); | |
726 | if (!changed) | |
727 | return -ENOMEM; | |
728 | ||
729 | old_pvid = br->default_pvid; | |
730 | ||
731 | /* Update default_pvid config only if we do not conflict with | |
732 | * user configuration. | |
733 | */ | |
2594e906 | 734 | pvent = br_vlan_find(br->vlgrp, pvid); |
77751ee8 | 735 | if ((!old_pvid || vlan_default_pvid(br->vlgrp, old_pvid)) && |
2594e906 | 736 | (!pvent || !br_vlan_should_use(pvent))) { |
5be5a2df VY |
737 | err = br_vlan_add(br, pvid, |
738 | BRIDGE_VLAN_INFO_PVID | | |
2594e906 NA |
739 | BRIDGE_VLAN_INFO_UNTAGGED | |
740 | BRIDGE_VLAN_INFO_BRENTRY); | |
5be5a2df VY |
741 | if (err) |
742 | goto out; | |
743 | br_vlan_delete(br, old_pvid); | |
744 | set_bit(0, changed); | |
745 | } | |
746 | ||
747 | list_for_each_entry(p, &br->port_list, list) { | |
748 | /* Update default_pvid config only if we do not conflict with | |
749 | * user configuration. | |
750 | */ | |
751 | if ((old_pvid && | |
77751ee8 | 752 | !vlan_default_pvid(p->vlgrp, old_pvid)) || |
2594e906 | 753 | br_vlan_find(p->vlgrp, pvid)) |
5be5a2df VY |
754 | continue; |
755 | ||
756 | err = nbp_vlan_add(p, pvid, | |
757 | BRIDGE_VLAN_INFO_PVID | | |
758 | BRIDGE_VLAN_INFO_UNTAGGED); | |
759 | if (err) | |
760 | goto err_port; | |
761 | nbp_vlan_delete(p, old_pvid); | |
762 | set_bit(p->port_no, changed); | |
763 | } | |
764 | ||
765 | br->default_pvid = pvid; | |
766 | ||
767 | out: | |
768 | kfree(changed); | |
769 | return err; | |
770 | ||
771 | err_port: | |
772 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { | |
773 | if (!test_bit(p->port_no, changed)) | |
774 | continue; | |
775 | ||
776 | if (old_pvid) | |
777 | nbp_vlan_add(p, old_pvid, | |
778 | BRIDGE_VLAN_INFO_PVID | | |
779 | BRIDGE_VLAN_INFO_UNTAGGED); | |
780 | nbp_vlan_delete(p, pvid); | |
781 | } | |
782 | ||
783 | if (test_bit(0, changed)) { | |
784 | if (old_pvid) | |
785 | br_vlan_add(br, old_pvid, | |
786 | BRIDGE_VLAN_INFO_PVID | | |
2594e906 NA |
787 | BRIDGE_VLAN_INFO_UNTAGGED | |
788 | BRIDGE_VLAN_INFO_BRENTRY); | |
5be5a2df VY |
789 | br_vlan_delete(br, pvid); |
790 | } | |
791 | goto out; | |
792 | } | |
793 | ||
96a20d9d VY |
794 | int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) |
795 | { | |
796 | u16 pvid = val; | |
797 | int err = 0; | |
798 | ||
5be5a2df | 799 | if (val >= VLAN_VID_MASK) |
96a20d9d VY |
800 | return -EINVAL; |
801 | ||
802 | if (!rtnl_trylock()) | |
803 | return restart_syscall(); | |
804 | ||
805 | if (pvid == br->default_pvid) | |
806 | goto unlock; | |
807 | ||
808 | /* Only allow default pvid change when filtering is disabled */ | |
809 | if (br->vlan_enabled) { | |
810 | pr_info_once("Please disable vlan filtering to change default_pvid\n"); | |
811 | err = -EPERM; | |
812 | goto unlock; | |
813 | } | |
814 | ||
5be5a2df VY |
815 | if (!pvid) |
816 | br_vlan_disable_default_pvid(br); | |
817 | else | |
818 | err = __br_vlan_set_default_pvid(br, pvid); | |
96a20d9d VY |
819 | |
820 | unlock: | |
821 | rtnl_unlock(); | |
822 | return err; | |
823 | } | |
824 | ||
5be5a2df | 825 | int br_vlan_init(struct net_bridge *br) |
8580e211 | 826 | { |
2594e906 NA |
827 | int ret = -ENOMEM; |
828 | ||
829 | br->vlgrp = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); | |
830 | if (!br->vlgrp) | |
831 | goto out; | |
832 | ret = rhashtable_init(&br->vlgrp->vlan_hash, &br_vlan_rht_params); | |
833 | if (ret) | |
834 | goto err_rhtbl; | |
835 | INIT_LIST_HEAD(&br->vlgrp->vlan_list); | |
8580e211 | 836 | br->vlan_proto = htons(ETH_P_8021Q); |
96a20d9d | 837 | br->default_pvid = 1; |
2594e906 NA |
838 | ret = br_vlan_add(br, 1, |
839 | BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | | |
840 | BRIDGE_VLAN_INFO_BRENTRY); | |
841 | if (ret) | |
842 | goto err_vlan_add; | |
843 | ||
844 | out: | |
845 | return ret; | |
846 | ||
847 | err_vlan_add: | |
848 | rhashtable_destroy(&br->vlgrp->vlan_hash); | |
849 | err_rhtbl: | |
850 | kfree(br->vlgrp); | |
851 | ||
852 | goto out; | |
853 | } | |
854 | ||
855 | int nbp_vlan_init(struct net_bridge_port *p) | |
856 | { | |
857 | int ret = -ENOMEM; | |
858 | ||
859 | p->vlgrp = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); | |
860 | if (!p->vlgrp) | |
861 | goto out; | |
862 | ||
863 | ret = rhashtable_init(&p->vlgrp->vlan_hash, &br_vlan_rht_params); | |
864 | if (ret) | |
865 | goto err_rhtbl; | |
866 | INIT_LIST_HEAD(&p->vlgrp->vlan_list); | |
867 | if (p->br->default_pvid) { | |
868 | ret = nbp_vlan_add(p, p->br->default_pvid, | |
869 | BRIDGE_VLAN_INFO_PVID | | |
870 | BRIDGE_VLAN_INFO_UNTAGGED); | |
871 | if (ret) | |
872 | goto err_vlan_add; | |
873 | } | |
874 | out: | |
875 | return ret; | |
876 | ||
877 | err_vlan_add: | |
878 | rhashtable_destroy(&p->vlgrp->vlan_hash); | |
879 | err_rhtbl: | |
880 | kfree(p->vlgrp); | |
881 | ||
882 | goto out; | |
8580e211 TM |
883 | } |
884 | ||
8adff41c TM |
885 | /* Must be protected by RTNL. |
886 | * Must be called with vid in range from 1 to 4094 inclusive. | |
887 | */ | |
552406c4 | 888 | int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) |
243a2e63 | 889 | { |
2594e906 NA |
890 | struct net_bridge_vlan *vlan; |
891 | int ret; | |
243a2e63 VY |
892 | |
893 | ASSERT_RTNL(); | |
894 | ||
2594e906 NA |
895 | vlan = br_vlan_find(port->vlgrp, vid); |
896 | if (vlan) { | |
897 | __vlan_add_flags(vlan, flags); | |
898 | return 0; | |
243a2e63 VY |
899 | } |
900 | ||
2594e906 NA |
901 | vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
902 | if (!vlan) | |
903 | return -ENOMEM; | |
243a2e63 | 904 | |
2594e906 NA |
905 | vlan->vid = vid; |
906 | vlan->port = port; | |
907 | ret = __vlan_add(vlan, flags); | |
908 | if (ret) | |
909 | kfree(vlan); | |
243a2e63 | 910 | |
2594e906 | 911 | return ret; |
243a2e63 VY |
912 | } |
913 | ||
8adff41c TM |
914 | /* Must be protected by RTNL. |
915 | * Must be called with vid in range from 1 to 4094 inclusive. | |
916 | */ | |
243a2e63 VY |
917 | int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) |
918 | { | |
2594e906 | 919 | struct net_bridge_vlan *v; |
243a2e63 VY |
920 | |
921 | ASSERT_RTNL(); | |
922 | ||
2594e906 NA |
923 | v = br_vlan_find(port->vlgrp, vid); |
924 | if (!v) | |
925 | return -ENOENT; | |
424bb9c9 | 926 | br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); |
1ea2d020 | 927 | br_fdb_delete_by_port(port->br, port, vid, 0); |
bc9a25d2 | 928 | |
2594e906 | 929 | return __vlan_del(v); |
243a2e63 VY |
930 | } |
931 | ||
932 | void nbp_vlan_flush(struct net_bridge_port *port) | |
933 | { | |
2594e906 | 934 | struct net_bridge_vlan *vlan; |
243a2e63 VY |
935 | |
936 | ASSERT_RTNL(); | |
937 | ||
2594e906 NA |
938 | list_for_each_entry(vlan, &port->vlgrp->vlan_list, vlist) |
939 | vlan_vid_del(port->dev, port->br->vlan_proto, vlan->vid); | |
bc9a25d2 | 940 | |
77751ee8 | 941 | __vlan_flush(nbp_vlan_group(port)); |
5be5a2df | 942 | } |