Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6bc506b4 IS |
2 | #include <linux/kernel.h> |
3 | #include <linux/list.h> | |
4 | #include <linux/netdevice.h> | |
5 | #include <linux/rtnetlink.h> | |
6 | #include <linux/skbuff.h> | |
9776457c | 7 | #include <net/ip.h> |
6bc506b4 IS |
8 | #include <net/switchdev.h> |
9 | ||
10 | #include "br_private.h" | |
11 | ||
47211192 TW |
12 | static struct static_key_false br_switchdev_tx_fwd_offload; |
13 | ||
14 | static bool nbp_switchdev_can_offload_tx_fwd(const struct net_bridge_port *p, | |
15 | const struct sk_buff *skb) | |
16 | { | |
17 | if (!static_branch_unlikely(&br_switchdev_tx_fwd_offload)) | |
18 | return false; | |
19 | ||
20 | return (p->flags & BR_TX_FWD_OFFLOAD) && | |
21 | (p->hwdom != BR_INPUT_SKB_CB(skb)->src_hwdom); | |
22 | } | |
23 | ||
24 | bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) | |
25 | { | |
26 | if (!static_branch_unlikely(&br_switchdev_tx_fwd_offload)) | |
27 | return false; | |
28 | ||
29 | return BR_INPUT_SKB_CB(skb)->tx_fwd_offload; | |
30 | } | |
31 | ||
c5381154 VO |
32 | void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) |
33 | { | |
34 | skb->offload_fwd_mark = br_switchdev_frame_uses_tx_fwd_offload(skb); | |
35 | } | |
36 | ||
47211192 TW |
37 | /* Mark the frame for TX forwarding offload if this egress port supports it */ |
38 | void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, | |
39 | struct sk_buff *skb) | |
40 | { | |
41 | if (nbp_switchdev_can_offload_tx_fwd(p, skb)) | |
42 | BR_INPUT_SKB_CB(skb)->tx_fwd_offload = true; | |
43 | } | |
44 | ||
45 | /* Lazily adds the hwdom of the egress bridge port to the bit mask of hwdoms | |
46 | * that the skb has been already forwarded to, to avoid further cloning to | |
47 | * other ports in the same hwdom by making nbp_switchdev_allowed_egress() | |
48 | * return false. | |
49 | */ | |
50 | void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, | |
51 | struct sk_buff *skb) | |
52 | { | |
53 | if (nbp_switchdev_can_offload_tx_fwd(p, skb)) | |
54 | set_bit(p->hwdom, &BR_INPUT_SKB_CB(skb)->fwd_hwdoms); | |
55 | } | |
56 | ||
6bc506b4 IS |
57 | void nbp_switchdev_frame_mark(const struct net_bridge_port *p, |
58 | struct sk_buff *skb) | |
59 | { | |
f7cf972f TW |
60 | if (p->hwdom) |
61 | BR_INPUT_SKB_CB(skb)->src_hwdom = p->hwdom; | |
6bc506b4 IS |
62 | } |
63 | ||
64 | bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, | |
65 | const struct sk_buff *skb) | |
66 | { | |
47211192 TW |
67 | struct br_input_skb_cb *cb = BR_INPUT_SKB_CB(skb); |
68 | ||
69 | return !test_bit(p->hwdom, &cb->fwd_hwdoms) && | |
70 | (!skb->offload_fwd_mark || cb->src_hwdom != p->hwdom); | |
6bc506b4 | 71 | } |
3922285d AS |
72 | |
73 | /* Flags that can be offloaded to hardware */ | |
9c0ca02b | 74 | #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | BR_PORT_MAB | \ |
c3976a3f AÜ |
75 | BR_MCAST_FLOOD | BR_BCAST_FLOOD | BR_PORT_LOCKED | \ |
76 | BR_HAIRPIN_MODE | BR_ISOLATED | BR_MULTICAST_TO_UNICAST) | |
3922285d AS |
77 | |
78 | int br_switchdev_set_port_flag(struct net_bridge_port *p, | |
79 | unsigned long flags, | |
078bbb85 VO |
80 | unsigned long mask, |
81 | struct netlink_ext_ack *extack) | |
3922285d AS |
82 | { |
83 | struct switchdev_attr attr = { | |
84 | .orig_dev = p->dev, | |
3922285d | 85 | }; |
d45224d6 FF |
86 | struct switchdev_notifier_port_attr_info info = { |
87 | .attr = &attr, | |
88 | }; | |
3922285d AS |
89 | int err; |
90 | ||
304ae3bf VO |
91 | mask &= BR_PORT_FLAGS_HW_OFFLOAD; |
92 | if (!mask) | |
3922285d AS |
93 | return 0; |
94 | ||
e18f4c18 VO |
95 | attr.id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS; |
96 | attr.u.brport_flags.val = flags; | |
97 | attr.u.brport_flags.mask = mask; | |
304ae3bf | 98 | |
d45224d6 FF |
99 | /* We run from atomic context here */ |
100 | err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev, | |
078bbb85 | 101 | &info.info, extack); |
d45224d6 | 102 | err = notifier_to_errno(err); |
3922285d AS |
103 | if (err == -EOPNOTSUPP) |
104 | return 0; | |
3922285d | 105 | |
1ef07644 | 106 | if (err) { |
028fb19c LR |
107 | NL_SET_ERR_MSG_WEAK_MOD(extack, |
108 | "bridge flag offload is not supported"); | |
3922285d AS |
109 | return -EOPNOTSUPP; |
110 | } | |
111 | ||
112 | attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; | |
113 | attr.flags = SWITCHDEV_F_DEFER; | |
1ef07644 | 114 | |
dcbdf135 | 115 | err = switchdev_port_attr_set(p->dev, &attr, extack); |
3922285d | 116 | if (err) { |
028fb19c LR |
117 | NL_SET_ERR_MSG_WEAK_MOD(extack, |
118 | "error setting offload flag on port"); | |
3922285d AS |
119 | return err; |
120 | } | |
121 | ||
122 | return 0; | |
123 | } | |
6b26b51b | 124 | |
fab9eca8 VO |
125 | static void br_switchdev_fdb_populate(struct net_bridge *br, |
126 | struct switchdev_notifier_fdb_info *item, | |
127 | const struct net_bridge_fdb_entry *fdb, | |
128 | const void *ctx) | |
129 | { | |
130 | const struct net_bridge_port *p = READ_ONCE(fdb->dst); | |
131 | ||
132 | item->addr = fdb->key.addr.addr; | |
133 | item->vid = fdb->key.vlan_id; | |
134 | item->added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); | |
135 | item->offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags); | |
136 | item->is_local = test_bit(BR_FDB_LOCAL, &fdb->flags); | |
27fabd02 | 137 | item->locked = false; |
fab9eca8 VO |
138 | item->info.dev = (!p || item->is_local) ? br->dev : p->dev; |
139 | item->info.ctx = ctx; | |
140 | } | |
141 | ||
6b26b51b | 142 | void |
6eb38bf8 TW |
143 | br_switchdev_fdb_notify(struct net_bridge *br, |
144 | const struct net_bridge_fdb_entry *fdb, int type) | |
6b26b51b | 145 | { |
fab9eca8 VO |
146 | struct switchdev_notifier_fdb_info item; |
147 | ||
27fabd02 HS |
148 | if (test_bit(BR_FDB_LOCKED, &fdb->flags)) |
149 | return; | |
150 | ||
927cdea5 VO |
151 | /* Entries with these flags were created using ndm_state == NUD_REACHABLE, |
152 | * ndm_flags == NTF_MASTER( | NTF_STICKY), ext_flags == 0 by something | |
153 | * equivalent to 'bridge fdb add ... master dynamic (sticky)'. | |
154 | * Drivers don't know how to deal with these, so don't notify them to | |
155 | * avoid confusing them. | |
156 | */ | |
157 | if (test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags) && | |
158 | !test_bit(BR_FDB_STATIC, &fdb->flags) && | |
159 | !test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags)) | |
160 | return; | |
161 | ||
fab9eca8 | 162 | br_switchdev_fdb_populate(br, &item, fdb, NULL); |
e5b4b898 | 163 | |
6b26b51b AS |
164 | switch (type) { |
165 | case RTM_DELNEIGH: | |
e5b4b898 | 166 | call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_DEVICE, |
fab9eca8 | 167 | item.info.dev, &item.info, NULL); |
6b26b51b AS |
168 | break; |
169 | case RTM_NEWNEIGH: | |
e5b4b898 | 170 | call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_DEVICE, |
fab9eca8 | 171 | item.info.dev, &item.info, NULL); |
6b26b51b AS |
172 | break; |
173 | } | |
174 | } | |
d66e4348 | 175 | |
169327d5 | 176 | int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, |
8d23a54f | 177 | bool changed, struct netlink_ext_ack *extack) |
d66e4348 PM |
178 | { |
179 | struct switchdev_obj_port_vlan v = { | |
180 | .obj.orig_dev = dev, | |
181 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
182 | .flags = flags, | |
b7a9e0da | 183 | .vid = vid, |
8d23a54f | 184 | .changed = changed, |
d66e4348 PM |
185 | }; |
186 | ||
69b7320e | 187 | return switchdev_port_obj_add(dev, &v.obj, extack); |
d66e4348 PM |
188 | } |
189 | ||
190 | int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) | |
191 | { | |
192 | struct switchdev_obj_port_vlan v = { | |
193 | .obj.orig_dev = dev, | |
194 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
b7a9e0da | 195 | .vid = vid, |
d66e4348 PM |
196 | }; |
197 | ||
198 | return switchdev_port_obj_del(dev, &v.obj); | |
199 | } | |
85826610 TW |
200 | |
201 | static int nbp_switchdev_hwdom_set(struct net_bridge_port *joining) | |
202 | { | |
203 | struct net_bridge *br = joining->br; | |
204 | struct net_bridge_port *p; | |
205 | int hwdom; | |
206 | ||
207 | /* joining is yet to be added to the port list. */ | |
208 | list_for_each_entry(p, &br->port_list, list) { | |
2f5dc00f | 209 | if (netdev_phys_item_id_same(&joining->ppid, &p->ppid)) { |
85826610 TW |
210 | joining->hwdom = p->hwdom; |
211 | return 0; | |
212 | } | |
213 | } | |
214 | ||
215 | hwdom = find_next_zero_bit(&br->busy_hwdoms, BR_HWDOM_MAX, 1); | |
216 | if (hwdom >= BR_HWDOM_MAX) | |
217 | return -EBUSY; | |
218 | ||
219 | set_bit(hwdom, &br->busy_hwdoms); | |
220 | joining->hwdom = hwdom; | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static void nbp_switchdev_hwdom_put(struct net_bridge_port *leaving) | |
225 | { | |
226 | struct net_bridge *br = leaving->br; | |
227 | struct net_bridge_port *p; | |
228 | ||
229 | /* leaving is no longer in the port list. */ | |
230 | list_for_each_entry(p, &br->port_list, list) { | |
231 | if (p->hwdom == leaving->hwdom) | |
232 | return; | |
233 | } | |
234 | ||
235 | clear_bit(leaving->hwdom, &br->busy_hwdoms); | |
236 | } | |
237 | ||
2f5dc00f VO |
238 | static int nbp_switchdev_add(struct net_bridge_port *p, |
239 | struct netdev_phys_item_id ppid, | |
47211192 | 240 | bool tx_fwd_offload, |
2f5dc00f | 241 | struct netlink_ext_ack *extack) |
85826610 | 242 | { |
47211192 TW |
243 | int err; |
244 | ||
2f5dc00f VO |
245 | if (p->offload_count) { |
246 | /* Prevent unsupported configurations such as a bridge port | |
247 | * which is a bonding interface, and the member ports are from | |
248 | * different hardware switches. | |
249 | */ | |
250 | if (!netdev_phys_item_id_same(&p->ppid, &ppid)) { | |
251 | NL_SET_ERR_MSG_MOD(extack, | |
252 | "Same bridge port cannot be offloaded by two physical switches"); | |
253 | return -EBUSY; | |
254 | } | |
85826610 | 255 | |
2f5dc00f VO |
256 | /* Tolerate drivers that call switchdev_bridge_port_offload() |
257 | * more than once for the same bridge port, such as when the | |
258 | * bridge port is an offloaded bonding/team interface. | |
259 | */ | |
260 | p->offload_count++; | |
85826610 | 261 | |
2f5dc00f | 262 | return 0; |
85826610 TW |
263 | } |
264 | ||
2f5dc00f VO |
265 | p->ppid = ppid; |
266 | p->offload_count = 1; | |
267 | ||
47211192 TW |
268 | err = nbp_switchdev_hwdom_set(p); |
269 | if (err) | |
270 | return err; | |
271 | ||
272 | if (tx_fwd_offload) { | |
273 | p->flags |= BR_TX_FWD_OFFLOAD; | |
274 | static_branch_inc(&br_switchdev_tx_fwd_offload); | |
275 | } | |
276 | ||
277 | return 0; | |
85826610 TW |
278 | } |
279 | ||
2f5dc00f | 280 | static void nbp_switchdev_del(struct net_bridge_port *p) |
85826610 | 281 | { |
2f5dc00f VO |
282 | if (WARN_ON(!p->offload_count)) |
283 | return; | |
284 | ||
285 | p->offload_count--; | |
286 | ||
287 | if (p->offload_count) | |
288 | return; | |
85826610 TW |
289 | |
290 | if (p->hwdom) | |
291 | nbp_switchdev_hwdom_put(p); | |
47211192 TW |
292 | |
293 | if (p->flags & BR_TX_FWD_OFFLOAD) { | |
294 | p->flags &= ~BR_TX_FWD_OFFLOAD; | |
295 | static_branch_dec(&br_switchdev_tx_fwd_offload); | |
296 | } | |
85826610 | 297 | } |
2f5dc00f | 298 | |
326b212e VO |
299 | static int |
300 | br_switchdev_fdb_replay_one(struct net_bridge *br, struct notifier_block *nb, | |
301 | const struct net_bridge_fdb_entry *fdb, | |
302 | unsigned long action, const void *ctx) | |
5cda5272 | 303 | { |
5cda5272 VO |
304 | struct switchdev_notifier_fdb_info item; |
305 | int err; | |
306 | ||
fab9eca8 | 307 | br_switchdev_fdb_populate(br, &item, fdb, ctx); |
5cda5272 VO |
308 | |
309 | err = nb->notifier_call(nb, action, &item); | |
310 | return notifier_to_errno(err); | |
311 | } | |
312 | ||
326b212e VO |
313 | static int |
314 | br_switchdev_fdb_replay(const struct net_device *br_dev, const void *ctx, | |
315 | bool adding, struct notifier_block *nb) | |
5cda5272 VO |
316 | { |
317 | struct net_bridge_fdb_entry *fdb; | |
318 | struct net_bridge *br; | |
319 | unsigned long action; | |
320 | int err = 0; | |
321 | ||
322 | if (!nb) | |
323 | return 0; | |
324 | ||
325 | if (!netif_is_bridge_master(br_dev)) | |
326 | return -EINVAL; | |
327 | ||
328 | br = netdev_priv(br_dev); | |
329 | ||
330 | if (adding) | |
331 | action = SWITCHDEV_FDB_ADD_TO_DEVICE; | |
332 | else | |
333 | action = SWITCHDEV_FDB_DEL_TO_DEVICE; | |
334 | ||
335 | rcu_read_lock(); | |
336 | ||
337 | hlist_for_each_entry_rcu(fdb, &br->fdb_list, fdb_node) { | |
326b212e | 338 | err = br_switchdev_fdb_replay_one(br, nb, fdb, action, ctx); |
5cda5272 VO |
339 | if (err) |
340 | break; | |
341 | } | |
342 | ||
343 | rcu_read_unlock(); | |
344 | ||
345 | return err; | |
346 | } | |
347 | ||
6284c723 TW |
348 | static int br_switchdev_vlan_attr_replay(struct net_device *br_dev, |
349 | const void *ctx, | |
350 | struct notifier_block *nb, | |
351 | struct netlink_ext_ack *extack) | |
352 | { | |
353 | struct switchdev_notifier_port_attr_info attr_info = { | |
354 | .info = { | |
355 | .dev = br_dev, | |
356 | .extack = extack, | |
357 | .ctx = ctx, | |
358 | }, | |
359 | }; | |
360 | struct net_bridge *br = netdev_priv(br_dev); | |
361 | struct net_bridge_vlan_group *vg; | |
362 | struct switchdev_attr attr; | |
363 | struct net_bridge_vlan *v; | |
364 | int err; | |
365 | ||
366 | attr_info.attr = &attr; | |
367 | attr.orig_dev = br_dev; | |
368 | ||
369 | vg = br_vlan_group(br); | |
7f40ea21 CL |
370 | if (!vg) |
371 | return 0; | |
6284c723 TW |
372 | |
373 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
374 | if (v->msti) { | |
375 | attr.id = SWITCHDEV_ATTR_ID_VLAN_MSTI; | |
376 | attr.u.vlan_msti.vid = v->vid; | |
377 | attr.u.vlan_msti.msti = v->msti; | |
378 | ||
379 | err = nb->notifier_call(nb, SWITCHDEV_PORT_ATTR_SET, | |
380 | &attr_info); | |
381 | err = notifier_to_errno(err); | |
382 | if (err) | |
383 | return err; | |
384 | } | |
385 | } | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
326b212e VO |
390 | static int |
391 | br_switchdev_vlan_replay_one(struct notifier_block *nb, | |
392 | struct net_device *dev, | |
393 | struct switchdev_obj_port_vlan *vlan, | |
394 | const void *ctx, unsigned long action, | |
395 | struct netlink_ext_ack *extack) | |
4a6849e4 VO |
396 | { |
397 | struct switchdev_notifier_port_obj_info obj_info = { | |
398 | .info = { | |
399 | .dev = dev, | |
400 | .extack = extack, | |
401 | .ctx = ctx, | |
402 | }, | |
403 | .obj = &vlan->obj, | |
404 | }; | |
405 | int err; | |
406 | ||
407 | err = nb->notifier_call(nb, action, &obj_info); | |
408 | return notifier_to_errno(err); | |
409 | } | |
410 | ||
b28d580e VO |
411 | static int br_switchdev_vlan_replay_group(struct notifier_block *nb, |
412 | struct net_device *dev, | |
413 | struct net_bridge_vlan_group *vg, | |
414 | const void *ctx, unsigned long action, | |
415 | struct netlink_ext_ack *extack) | |
4a6849e4 | 416 | { |
4a6849e4 | 417 | struct net_bridge_vlan *v; |
4a6849e4 VO |
418 | int err = 0; |
419 | u16 pvid; | |
420 | ||
4a6849e4 VO |
421 | if (!vg) |
422 | return 0; | |
423 | ||
4a6849e4 VO |
424 | pvid = br_get_pvid(vg); |
425 | ||
426 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
427 | struct switchdev_obj_port_vlan vlan = { | |
428 | .obj.orig_dev = dev, | |
429 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
430 | .flags = br_vlan_flags(v, pvid), | |
431 | .vid = v->vid, | |
432 | }; | |
433 | ||
434 | if (!br_vlan_should_use(v)) | |
435 | continue; | |
436 | ||
326b212e VO |
437 | err = br_switchdev_vlan_replay_one(nb, dev, &vlan, ctx, |
438 | action, extack); | |
4a6849e4 VO |
439 | if (err) |
440 | return err; | |
441 | } | |
442 | ||
b28d580e VO |
443 | return 0; |
444 | } | |
445 | ||
446 | static int br_switchdev_vlan_replay(struct net_device *br_dev, | |
447 | const void *ctx, bool adding, | |
448 | struct notifier_block *nb, | |
449 | struct netlink_ext_ack *extack) | |
450 | { | |
451 | struct net_bridge *br = netdev_priv(br_dev); | |
452 | struct net_bridge_port *p; | |
453 | unsigned long action; | |
454 | int err; | |
455 | ||
456 | ASSERT_RTNL(); | |
457 | ||
458 | if (!nb) | |
459 | return 0; | |
460 | ||
461 | if (!netif_is_bridge_master(br_dev)) | |
462 | return -EINVAL; | |
463 | ||
464 | if (adding) | |
465 | action = SWITCHDEV_PORT_OBJ_ADD; | |
466 | else | |
467 | action = SWITCHDEV_PORT_OBJ_DEL; | |
468 | ||
469 | err = br_switchdev_vlan_replay_group(nb, br_dev, br_vlan_group(br), | |
470 | ctx, action, extack); | |
471 | if (err) | |
472 | return err; | |
473 | ||
474 | list_for_each_entry(p, &br->port_list, list) { | |
475 | struct net_device *dev = p->dev; | |
476 | ||
477 | err = br_switchdev_vlan_replay_group(nb, dev, | |
478 | nbp_vlan_group(p), | |
479 | ctx, action, extack); | |
480 | if (err) | |
481 | return err; | |
482 | } | |
483 | ||
6284c723 TW |
484 | if (adding) { |
485 | err = br_switchdev_vlan_attr_replay(br_dev, ctx, nb, extack); | |
486 | if (err) | |
487 | return err; | |
488 | } | |
489 | ||
b28d580e | 490 | return 0; |
4a6849e4 VO |
491 | } |
492 | ||
9776457c | 493 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
326b212e | 494 | struct br_switchdev_mdb_complete_info { |
9776457c VO |
495 | struct net_bridge_port *port; |
496 | struct br_ip ip; | |
497 | }; | |
498 | ||
326b212e | 499 | static void br_switchdev_mdb_complete(struct net_device *dev, int err, void *priv) |
9776457c | 500 | { |
326b212e | 501 | struct br_switchdev_mdb_complete_info *data = priv; |
9776457c VO |
502 | struct net_bridge_port_group __rcu **pp; |
503 | struct net_bridge_port_group *p; | |
504 | struct net_bridge_mdb_entry *mp; | |
505 | struct net_bridge_port *port = data->port; | |
506 | struct net_bridge *br = port->br; | |
507 | ||
508 | if (err) | |
509 | goto err; | |
510 | ||
511 | spin_lock_bh(&br->multicast_lock); | |
512 | mp = br_mdb_ip_get(br, &data->ip); | |
513 | if (!mp) | |
514 | goto out; | |
515 | for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; | |
516 | pp = &p->next) { | |
517 | if (p->key.port != port) | |
518 | continue; | |
519 | p->flags |= MDB_PG_FLAGS_OFFLOAD; | |
520 | } | |
521 | out: | |
522 | spin_unlock_bh(&br->multicast_lock); | |
523 | err: | |
524 | kfree(priv); | |
525 | } | |
526 | ||
527 | static void br_switchdev_mdb_populate(struct switchdev_obj_port_mdb *mdb, | |
528 | const struct net_bridge_mdb_entry *mp) | |
529 | { | |
530 | if (mp->addr.proto == htons(ETH_P_IP)) | |
531 | ip_eth_mc_map(mp->addr.dst.ip4, mdb->addr); | |
532 | #if IS_ENABLED(CONFIG_IPV6) | |
533 | else if (mp->addr.proto == htons(ETH_P_IPV6)) | |
534 | ipv6_eth_mc_map(&mp->addr.dst.ip6, mdb->addr); | |
535 | #endif | |
536 | else | |
537 | ether_addr_copy(mdb->addr, mp->addr.dst.mac_addr); | |
538 | ||
539 | mdb->vid = mp->addr.vid; | |
540 | } | |
541 | ||
326b212e VO |
542 | static void br_switchdev_host_mdb_one(struct net_device *dev, |
543 | struct net_device *lower_dev, | |
544 | struct net_bridge_mdb_entry *mp, | |
545 | int type) | |
9776457c VO |
546 | { |
547 | struct switchdev_obj_port_mdb mdb = { | |
548 | .obj = { | |
549 | .id = SWITCHDEV_OBJ_ID_HOST_MDB, | |
550 | .flags = SWITCHDEV_F_DEFER, | |
551 | .orig_dev = dev, | |
552 | }, | |
553 | }; | |
554 | ||
555 | br_switchdev_mdb_populate(&mdb, mp); | |
556 | ||
557 | switch (type) { | |
558 | case RTM_NEWMDB: | |
559 | switchdev_port_obj_add(lower_dev, &mdb.obj, NULL); | |
560 | break; | |
561 | case RTM_DELMDB: | |
562 | switchdev_port_obj_del(lower_dev, &mdb.obj); | |
563 | break; | |
564 | } | |
565 | } | |
566 | ||
326b212e | 567 | static void br_switchdev_host_mdb(struct net_device *dev, |
9776457c VO |
568 | struct net_bridge_mdb_entry *mp, int type) |
569 | { | |
570 | struct net_device *lower_dev; | |
571 | struct list_head *iter; | |
572 | ||
573 | netdev_for_each_lower_dev(dev, lower_dev, iter) | |
326b212e | 574 | br_switchdev_host_mdb_one(dev, lower_dev, mp, type); |
9776457c VO |
575 | } |
576 | ||
326b212e VO |
577 | static int |
578 | br_switchdev_mdb_replay_one(struct notifier_block *nb, struct net_device *dev, | |
579 | const struct switchdev_obj_port_mdb *mdb, | |
580 | unsigned long action, const void *ctx, | |
581 | struct netlink_ext_ack *extack) | |
9776457c VO |
582 | { |
583 | struct switchdev_notifier_port_obj_info obj_info = { | |
584 | .info = { | |
585 | .dev = dev, | |
586 | .extack = extack, | |
587 | .ctx = ctx, | |
588 | }, | |
589 | .obj = &mdb->obj, | |
590 | }; | |
591 | int err; | |
592 | ||
593 | err = nb->notifier_call(nb, action, &obj_info); | |
594 | return notifier_to_errno(err); | |
595 | } | |
596 | ||
326b212e | 597 | static int br_switchdev_mdb_queue_one(struct list_head *mdb_list, |
dc489f86 TW |
598 | struct net_device *dev, |
599 | unsigned long action, | |
326b212e VO |
600 | enum switchdev_obj_id id, |
601 | const struct net_bridge_mdb_entry *mp, | |
602 | struct net_device *orig_dev) | |
9776457c | 603 | { |
dc489f86 TW |
604 | struct switchdev_obj_port_mdb mdb = { |
605 | .obj = { | |
606 | .id = id, | |
607 | .orig_dev = orig_dev, | |
608 | }, | |
609 | }; | |
610 | struct switchdev_obj_port_mdb *pmdb; | |
9776457c | 611 | |
dc489f86 | 612 | br_switchdev_mdb_populate(&mdb, mp); |
9776457c | 613 | |
dc489f86 TW |
614 | if (action == SWITCHDEV_PORT_OBJ_ADD && |
615 | switchdev_port_obj_act_is_deferred(dev, action, &mdb.obj)) { | |
616 | /* This event is already in the deferred queue of | |
617 | * events, so this replay must be elided, lest the | |
618 | * driver receives duplicate events for it. This can | |
619 | * only happen when replaying additions, since | |
620 | * modifications are always immediately visible in | |
621 | * br->mdb_list, whereas actual event delivery may be | |
622 | * delayed. | |
623 | */ | |
624 | return 0; | |
625 | } | |
626 | ||
627 | pmdb = kmemdup(&mdb, sizeof(mdb), GFP_ATOMIC); | |
628 | if (!pmdb) | |
629 | return -ENOMEM; | |
9776457c | 630 | |
dc489f86 | 631 | list_add_tail(&pmdb->obj.list, mdb_list); |
9776457c VO |
632 | return 0; |
633 | } | |
634 | ||
635 | void br_switchdev_mdb_notify(struct net_device *dev, | |
636 | struct net_bridge_mdb_entry *mp, | |
637 | struct net_bridge_port_group *pg, | |
638 | int type) | |
639 | { | |
326b212e | 640 | struct br_switchdev_mdb_complete_info *complete_info; |
9776457c VO |
641 | struct switchdev_obj_port_mdb mdb = { |
642 | .obj = { | |
643 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
644 | .flags = SWITCHDEV_F_DEFER, | |
645 | }, | |
646 | }; | |
647 | ||
648 | if (!pg) | |
326b212e | 649 | return br_switchdev_host_mdb(dev, mp, type); |
9776457c VO |
650 | |
651 | br_switchdev_mdb_populate(&mdb, mp); | |
652 | ||
653 | mdb.obj.orig_dev = pg->key.port->dev; | |
654 | switch (type) { | |
655 | case RTM_NEWMDB: | |
656 | complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC); | |
657 | if (!complete_info) | |
658 | break; | |
659 | complete_info->port = pg->key.port; | |
660 | complete_info->ip = mp->addr; | |
661 | mdb.obj.complete_priv = complete_info; | |
326b212e | 662 | mdb.obj.complete = br_switchdev_mdb_complete; |
9776457c VO |
663 | if (switchdev_port_obj_add(pg->key.port->dev, &mdb.obj, NULL)) |
664 | kfree(complete_info); | |
665 | break; | |
666 | case RTM_DELMDB: | |
667 | switchdev_port_obj_del(pg->key.port->dev, &mdb.obj); | |
668 | break; | |
669 | } | |
670 | } | |
671 | #endif | |
672 | ||
326b212e VO |
673 | static int |
674 | br_switchdev_mdb_replay(struct net_device *br_dev, struct net_device *dev, | |
675 | const void *ctx, bool adding, struct notifier_block *nb, | |
676 | struct netlink_ext_ack *extack) | |
9776457c VO |
677 | { |
678 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING | |
679 | const struct net_bridge_mdb_entry *mp; | |
680 | struct switchdev_obj *obj, *tmp; | |
681 | struct net_bridge *br; | |
682 | unsigned long action; | |
683 | LIST_HEAD(mdb_list); | |
684 | int err = 0; | |
685 | ||
686 | ASSERT_RTNL(); | |
687 | ||
688 | if (!nb) | |
689 | return 0; | |
690 | ||
691 | if (!netif_is_bridge_master(br_dev) || !netif_is_bridge_port(dev)) | |
692 | return -EINVAL; | |
693 | ||
694 | br = netdev_priv(br_dev); | |
695 | ||
696 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
697 | return 0; | |
698 | ||
dc489f86 TW |
699 | if (adding) |
700 | action = SWITCHDEV_PORT_OBJ_ADD; | |
701 | else | |
702 | action = SWITCHDEV_PORT_OBJ_DEL; | |
703 | ||
704 | /* br_switchdev_mdb_queue_one() will take care to not queue a | |
705 | * replay of an event that is already pending in the switchdev | |
706 | * deferred queue. In order to safely determine that, there | |
707 | * must be no new deferred MDB notifications enqueued for the | |
708 | * duration of the MDB scan. Therefore, grab the write-side | |
709 | * lock to avoid racing with any concurrent IGMP/MLD snooping. | |
9776457c | 710 | */ |
dc489f86 | 711 | spin_lock_bh(&br->multicast_lock); |
9776457c | 712 | |
dc489f86 | 713 | hlist_for_each_entry(mp, &br->mdb_list, mdb_node) { |
9776457c VO |
714 | struct net_bridge_port_group __rcu * const *pp; |
715 | const struct net_bridge_port_group *p; | |
716 | ||
717 | if (mp->host_joined) { | |
dc489f86 | 718 | err = br_switchdev_mdb_queue_one(&mdb_list, dev, action, |
326b212e VO |
719 | SWITCHDEV_OBJ_ID_HOST_MDB, |
720 | mp, br_dev); | |
9776457c | 721 | if (err) { |
dc489f86 | 722 | spin_unlock_bh(&br->multicast_lock); |
9776457c VO |
723 | goto out_free_mdb; |
724 | } | |
725 | } | |
726 | ||
dc489f86 | 727 | for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; |
9776457c VO |
728 | pp = &p->next) { |
729 | if (p->key.port->dev != dev) | |
730 | continue; | |
731 | ||
dc489f86 | 732 | err = br_switchdev_mdb_queue_one(&mdb_list, dev, action, |
326b212e VO |
733 | SWITCHDEV_OBJ_ID_PORT_MDB, |
734 | mp, dev); | |
9776457c | 735 | if (err) { |
dc489f86 | 736 | spin_unlock_bh(&br->multicast_lock); |
9776457c VO |
737 | goto out_free_mdb; |
738 | } | |
739 | } | |
740 | } | |
741 | ||
dc489f86 | 742 | spin_unlock_bh(&br->multicast_lock); |
9776457c VO |
743 | |
744 | list_for_each_entry(obj, &mdb_list, list) { | |
326b212e VO |
745 | err = br_switchdev_mdb_replay_one(nb, dev, |
746 | SWITCHDEV_OBJ_PORT_MDB(obj), | |
747 | action, ctx, extack); | |
989280d6 PM |
748 | if (err == -EOPNOTSUPP) |
749 | err = 0; | |
9776457c VO |
750 | if (err) |
751 | goto out_free_mdb; | |
752 | } | |
753 | ||
754 | out_free_mdb: | |
755 | list_for_each_entry_safe(obj, tmp, &mdb_list, list) { | |
756 | list_del(&obj->list); | |
757 | kfree(SWITCHDEV_OBJ_PORT_MDB(obj)); | |
758 | } | |
759 | ||
760 | if (err) | |
761 | return err; | |
762 | #endif | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
4e51bf44 VO |
767 | static int nbp_switchdev_sync_objs(struct net_bridge_port *p, const void *ctx, |
768 | struct notifier_block *atomic_nb, | |
769 | struct notifier_block *blocking_nb, | |
770 | struct netlink_ext_ack *extack) | |
771 | { | |
772 | struct net_device *br_dev = p->br->dev; | |
773 | struct net_device *dev = p->dev; | |
774 | int err; | |
775 | ||
b28d580e | 776 | err = br_switchdev_vlan_replay(br_dev, ctx, true, blocking_nb, extack); |
4e51bf44 VO |
777 | if (err && err != -EOPNOTSUPP) |
778 | return err; | |
779 | ||
326b212e VO |
780 | err = br_switchdev_mdb_replay(br_dev, dev, ctx, true, blocking_nb, |
781 | extack); | |
989280d6 PM |
782 | if (err) { |
783 | /* -EOPNOTSUPP not propagated from MDB replay. */ | |
4e51bf44 | 784 | return err; |
989280d6 | 785 | } |
4e51bf44 | 786 | |
326b212e | 787 | err = br_switchdev_fdb_replay(br_dev, ctx, true, atomic_nb); |
4e51bf44 VO |
788 | if (err && err != -EOPNOTSUPP) |
789 | return err; | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | static void nbp_switchdev_unsync_objs(struct net_bridge_port *p, | |
795 | const void *ctx, | |
796 | struct notifier_block *atomic_nb, | |
797 | struct notifier_block *blocking_nb) | |
798 | { | |
799 | struct net_device *br_dev = p->br->dev; | |
800 | struct net_device *dev = p->dev; | |
801 | ||
263029ae | 802 | br_switchdev_fdb_replay(br_dev, ctx, false, atomic_nb); |
4e51bf44 | 803 | |
326b212e | 804 | br_switchdev_mdb_replay(br_dev, dev, ctx, false, blocking_nb, NULL); |
4e51bf44 | 805 | |
b28d580e | 806 | br_switchdev_vlan_replay(br_dev, ctx, false, blocking_nb, NULL); |
f7a70d65 TW |
807 | |
808 | /* Make sure that the device leaving this bridge has seen all | |
809 | * relevant events before it is disassociated. In the normal | |
810 | * case, when the device is directly attached to the bridge, | |
811 | * this is covered by del_nbp(). If the association was indirect | |
812 | * however, e.g. via a team or bond, and the device is leaving | |
813 | * that intermediate device, then the bridge port remains in | |
814 | * place. | |
815 | */ | |
816 | switchdev_deferred_process(); | |
4e51bf44 VO |
817 | } |
818 | ||
2f5dc00f VO |
819 | /* Let the bridge know that this port is offloaded, so that it can assign a |
820 | * switchdev hardware domain to it. | |
821 | */ | |
957e2235 VO |
822 | int br_switchdev_port_offload(struct net_bridge_port *p, |
823 | struct net_device *dev, const void *ctx, | |
824 | struct notifier_block *atomic_nb, | |
825 | struct notifier_block *blocking_nb, | |
826 | bool tx_fwd_offload, | |
827 | struct netlink_ext_ack *extack) | |
2f5dc00f VO |
828 | { |
829 | struct netdev_phys_item_id ppid; | |
2f5dc00f VO |
830 | int err; |
831 | ||
2f5dc00f VO |
832 | err = dev_get_port_parent_id(dev, &ppid, false); |
833 | if (err) | |
834 | return err; | |
835 | ||
47211192 | 836 | err = nbp_switchdev_add(p, ppid, tx_fwd_offload, extack); |
4e51bf44 VO |
837 | if (err) |
838 | return err; | |
839 | ||
840 | err = nbp_switchdev_sync_objs(p, ctx, atomic_nb, blocking_nb, extack); | |
841 | if (err) | |
842 | goto out_switchdev_del; | |
843 | ||
844 | return 0; | |
845 | ||
846 | out_switchdev_del: | |
847 | nbp_switchdev_del(p); | |
848 | ||
849 | return err; | |
2f5dc00f | 850 | } |
2f5dc00f | 851 | |
957e2235 VO |
852 | void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, |
853 | struct notifier_block *atomic_nb, | |
854 | struct notifier_block *blocking_nb) | |
2f5dc00f | 855 | { |
4e51bf44 VO |
856 | nbp_switchdev_unsync_objs(p, ctx, atomic_nb, blocking_nb); |
857 | ||
2f5dc00f VO |
858 | nbp_switchdev_del(p); |
859 | } | |
f2e2857b PM |
860 | |
861 | int br_switchdev_port_replay(struct net_bridge_port *p, | |
862 | struct net_device *dev, const void *ctx, | |
863 | struct notifier_block *atomic_nb, | |
864 | struct notifier_block *blocking_nb, | |
865 | struct netlink_ext_ack *extack) | |
866 | { | |
867 | return nbp_switchdev_sync_objs(p, ctx, atomic_nb, blocking_nb, extack); | |
868 | } |