Commit | Line | Data |
---|---|---|
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 */ | |
74 | #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ | |
fa1c8334 | 75 | BR_MCAST_FLOOD | BR_BCAST_FLOOD | BR_PORT_LOCKED) |
3922285d AS |
76 | |
77 | int br_switchdev_set_port_flag(struct net_bridge_port *p, | |
78 | unsigned long flags, | |
078bbb85 VO |
79 | unsigned long mask, |
80 | struct netlink_ext_ack *extack) | |
3922285d AS |
81 | { |
82 | struct switchdev_attr attr = { | |
83 | .orig_dev = p->dev, | |
3922285d | 84 | }; |
d45224d6 FF |
85 | struct switchdev_notifier_port_attr_info info = { |
86 | .attr = &attr, | |
87 | }; | |
3922285d AS |
88 | int err; |
89 | ||
304ae3bf VO |
90 | mask &= BR_PORT_FLAGS_HW_OFFLOAD; |
91 | if (!mask) | |
3922285d AS |
92 | return 0; |
93 | ||
e18f4c18 VO |
94 | attr.id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS; |
95 | attr.u.brport_flags.val = flags; | |
96 | attr.u.brport_flags.mask = mask; | |
304ae3bf | 97 | |
d45224d6 FF |
98 | /* We run from atomic context here */ |
99 | err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev, | |
078bbb85 | 100 | &info.info, extack); |
d45224d6 | 101 | err = notifier_to_errno(err); |
3922285d AS |
102 | if (err == -EOPNOTSUPP) |
103 | return 0; | |
3922285d | 104 | |
1ef07644 | 105 | if (err) { |
078bbb85 VO |
106 | if (extack && !extack->_msg) |
107 | NL_SET_ERR_MSG_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) { |
dcbdf135 VO |
117 | if (extack && !extack->_msg) |
118 | NL_SET_ERR_MSG_MOD(extack, | |
119 | "error setting offload flag on port"); | |
3922285d AS |
120 | return err; |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
6b26b51b | 125 | |
fab9eca8 VO |
126 | static void br_switchdev_fdb_populate(struct net_bridge *br, |
127 | struct switchdev_notifier_fdb_info *item, | |
128 | const struct net_bridge_fdb_entry *fdb, | |
129 | const void *ctx) | |
130 | { | |
131 | const struct net_bridge_port *p = READ_ONCE(fdb->dst); | |
132 | ||
133 | item->addr = fdb->key.addr.addr; | |
134 | item->vid = fdb->key.vlan_id; | |
135 | item->added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); | |
136 | item->offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags); | |
137 | item->is_local = test_bit(BR_FDB_LOCAL, &fdb->flags); | |
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 | ||
148 | br_switchdev_fdb_populate(br, &item, fdb, NULL); | |
e5b4b898 | 149 | |
6b26b51b AS |
150 | switch (type) { |
151 | case RTM_DELNEIGH: | |
e5b4b898 | 152 | call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_DEVICE, |
fab9eca8 | 153 | item.info.dev, &item.info, NULL); |
6b26b51b AS |
154 | break; |
155 | case RTM_NEWNEIGH: | |
e5b4b898 | 156 | call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_DEVICE, |
fab9eca8 | 157 | item.info.dev, &item.info, NULL); |
6b26b51b AS |
158 | break; |
159 | } | |
160 | } | |
d66e4348 | 161 | |
169327d5 | 162 | int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, |
8d23a54f | 163 | bool changed, struct netlink_ext_ack *extack) |
d66e4348 PM |
164 | { |
165 | struct switchdev_obj_port_vlan v = { | |
166 | .obj.orig_dev = dev, | |
167 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
168 | .flags = flags, | |
b7a9e0da | 169 | .vid = vid, |
8d23a54f | 170 | .changed = changed, |
d66e4348 PM |
171 | }; |
172 | ||
69b7320e | 173 | return switchdev_port_obj_add(dev, &v.obj, extack); |
d66e4348 PM |
174 | } |
175 | ||
176 | int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) | |
177 | { | |
178 | struct switchdev_obj_port_vlan v = { | |
179 | .obj.orig_dev = dev, | |
180 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
b7a9e0da | 181 | .vid = vid, |
d66e4348 PM |
182 | }; |
183 | ||
184 | return switchdev_port_obj_del(dev, &v.obj); | |
185 | } | |
85826610 TW |
186 | |
187 | static int nbp_switchdev_hwdom_set(struct net_bridge_port *joining) | |
188 | { | |
189 | struct net_bridge *br = joining->br; | |
190 | struct net_bridge_port *p; | |
191 | int hwdom; | |
192 | ||
193 | /* joining is yet to be added to the port list. */ | |
194 | list_for_each_entry(p, &br->port_list, list) { | |
2f5dc00f | 195 | if (netdev_phys_item_id_same(&joining->ppid, &p->ppid)) { |
85826610 TW |
196 | joining->hwdom = p->hwdom; |
197 | return 0; | |
198 | } | |
199 | } | |
200 | ||
201 | hwdom = find_next_zero_bit(&br->busy_hwdoms, BR_HWDOM_MAX, 1); | |
202 | if (hwdom >= BR_HWDOM_MAX) | |
203 | return -EBUSY; | |
204 | ||
205 | set_bit(hwdom, &br->busy_hwdoms); | |
206 | joining->hwdom = hwdom; | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static void nbp_switchdev_hwdom_put(struct net_bridge_port *leaving) | |
211 | { | |
212 | struct net_bridge *br = leaving->br; | |
213 | struct net_bridge_port *p; | |
214 | ||
215 | /* leaving is no longer in the port list. */ | |
216 | list_for_each_entry(p, &br->port_list, list) { | |
217 | if (p->hwdom == leaving->hwdom) | |
218 | return; | |
219 | } | |
220 | ||
221 | clear_bit(leaving->hwdom, &br->busy_hwdoms); | |
222 | } | |
223 | ||
2f5dc00f VO |
224 | static int nbp_switchdev_add(struct net_bridge_port *p, |
225 | struct netdev_phys_item_id ppid, | |
47211192 | 226 | bool tx_fwd_offload, |
2f5dc00f | 227 | struct netlink_ext_ack *extack) |
85826610 | 228 | { |
47211192 TW |
229 | int err; |
230 | ||
2f5dc00f VO |
231 | if (p->offload_count) { |
232 | /* Prevent unsupported configurations such as a bridge port | |
233 | * which is a bonding interface, and the member ports are from | |
234 | * different hardware switches. | |
235 | */ | |
236 | if (!netdev_phys_item_id_same(&p->ppid, &ppid)) { | |
237 | NL_SET_ERR_MSG_MOD(extack, | |
238 | "Same bridge port cannot be offloaded by two physical switches"); | |
239 | return -EBUSY; | |
240 | } | |
85826610 | 241 | |
2f5dc00f VO |
242 | /* Tolerate drivers that call switchdev_bridge_port_offload() |
243 | * more than once for the same bridge port, such as when the | |
244 | * bridge port is an offloaded bonding/team interface. | |
245 | */ | |
246 | p->offload_count++; | |
85826610 | 247 | |
2f5dc00f | 248 | return 0; |
85826610 TW |
249 | } |
250 | ||
2f5dc00f VO |
251 | p->ppid = ppid; |
252 | p->offload_count = 1; | |
253 | ||
47211192 TW |
254 | err = nbp_switchdev_hwdom_set(p); |
255 | if (err) | |
256 | return err; | |
257 | ||
258 | if (tx_fwd_offload) { | |
259 | p->flags |= BR_TX_FWD_OFFLOAD; | |
260 | static_branch_inc(&br_switchdev_tx_fwd_offload); | |
261 | } | |
262 | ||
263 | return 0; | |
85826610 TW |
264 | } |
265 | ||
2f5dc00f | 266 | static void nbp_switchdev_del(struct net_bridge_port *p) |
85826610 | 267 | { |
2f5dc00f VO |
268 | if (WARN_ON(!p->offload_count)) |
269 | return; | |
270 | ||
271 | p->offload_count--; | |
272 | ||
273 | if (p->offload_count) | |
274 | return; | |
85826610 TW |
275 | |
276 | if (p->hwdom) | |
277 | nbp_switchdev_hwdom_put(p); | |
47211192 TW |
278 | |
279 | if (p->flags & BR_TX_FWD_OFFLOAD) { | |
280 | p->flags &= ~BR_TX_FWD_OFFLOAD; | |
281 | static_branch_dec(&br_switchdev_tx_fwd_offload); | |
282 | } | |
85826610 | 283 | } |
2f5dc00f | 284 | |
326b212e VO |
285 | static int |
286 | br_switchdev_fdb_replay_one(struct net_bridge *br, struct notifier_block *nb, | |
287 | const struct net_bridge_fdb_entry *fdb, | |
288 | unsigned long action, const void *ctx) | |
5cda5272 | 289 | { |
5cda5272 VO |
290 | struct switchdev_notifier_fdb_info item; |
291 | int err; | |
292 | ||
fab9eca8 | 293 | br_switchdev_fdb_populate(br, &item, fdb, ctx); |
5cda5272 VO |
294 | |
295 | err = nb->notifier_call(nb, action, &item); | |
296 | return notifier_to_errno(err); | |
297 | } | |
298 | ||
326b212e VO |
299 | static int |
300 | br_switchdev_fdb_replay(const struct net_device *br_dev, const void *ctx, | |
301 | bool adding, struct notifier_block *nb) | |
5cda5272 VO |
302 | { |
303 | struct net_bridge_fdb_entry *fdb; | |
304 | struct net_bridge *br; | |
305 | unsigned long action; | |
306 | int err = 0; | |
307 | ||
308 | if (!nb) | |
309 | return 0; | |
310 | ||
311 | if (!netif_is_bridge_master(br_dev)) | |
312 | return -EINVAL; | |
313 | ||
314 | br = netdev_priv(br_dev); | |
315 | ||
316 | if (adding) | |
317 | action = SWITCHDEV_FDB_ADD_TO_DEVICE; | |
318 | else | |
319 | action = SWITCHDEV_FDB_DEL_TO_DEVICE; | |
320 | ||
321 | rcu_read_lock(); | |
322 | ||
323 | hlist_for_each_entry_rcu(fdb, &br->fdb_list, fdb_node) { | |
326b212e | 324 | err = br_switchdev_fdb_replay_one(br, nb, fdb, action, ctx); |
5cda5272 VO |
325 | if (err) |
326 | break; | |
327 | } | |
328 | ||
329 | rcu_read_unlock(); | |
330 | ||
331 | return err; | |
332 | } | |
333 | ||
326b212e VO |
334 | static int |
335 | br_switchdev_vlan_replay_one(struct notifier_block *nb, | |
336 | struct net_device *dev, | |
337 | struct switchdev_obj_port_vlan *vlan, | |
338 | const void *ctx, unsigned long action, | |
339 | struct netlink_ext_ack *extack) | |
4a6849e4 VO |
340 | { |
341 | struct switchdev_notifier_port_obj_info obj_info = { | |
342 | .info = { | |
343 | .dev = dev, | |
344 | .extack = extack, | |
345 | .ctx = ctx, | |
346 | }, | |
347 | .obj = &vlan->obj, | |
348 | }; | |
349 | int err; | |
350 | ||
351 | err = nb->notifier_call(nb, action, &obj_info); | |
352 | return notifier_to_errno(err); | |
353 | } | |
354 | ||
b28d580e VO |
355 | static int br_switchdev_vlan_replay_group(struct notifier_block *nb, |
356 | struct net_device *dev, | |
357 | struct net_bridge_vlan_group *vg, | |
358 | const void *ctx, unsigned long action, | |
359 | struct netlink_ext_ack *extack) | |
4a6849e4 | 360 | { |
4a6849e4 | 361 | struct net_bridge_vlan *v; |
4a6849e4 VO |
362 | int err = 0; |
363 | u16 pvid; | |
364 | ||
4a6849e4 VO |
365 | if (!vg) |
366 | return 0; | |
367 | ||
4a6849e4 VO |
368 | pvid = br_get_pvid(vg); |
369 | ||
370 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
371 | struct switchdev_obj_port_vlan vlan = { | |
372 | .obj.orig_dev = dev, | |
373 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
374 | .flags = br_vlan_flags(v, pvid), | |
375 | .vid = v->vid, | |
376 | }; | |
377 | ||
378 | if (!br_vlan_should_use(v)) | |
379 | continue; | |
380 | ||
326b212e VO |
381 | err = br_switchdev_vlan_replay_one(nb, dev, &vlan, ctx, |
382 | action, extack); | |
4a6849e4 VO |
383 | if (err) |
384 | return err; | |
385 | } | |
386 | ||
b28d580e VO |
387 | return 0; |
388 | } | |
389 | ||
390 | static int br_switchdev_vlan_replay(struct net_device *br_dev, | |
391 | const void *ctx, bool adding, | |
392 | struct notifier_block *nb, | |
393 | struct netlink_ext_ack *extack) | |
394 | { | |
395 | struct net_bridge *br = netdev_priv(br_dev); | |
396 | struct net_bridge_port *p; | |
397 | unsigned long action; | |
398 | int err; | |
399 | ||
400 | ASSERT_RTNL(); | |
401 | ||
402 | if (!nb) | |
403 | return 0; | |
404 | ||
405 | if (!netif_is_bridge_master(br_dev)) | |
406 | return -EINVAL; | |
407 | ||
408 | if (adding) | |
409 | action = SWITCHDEV_PORT_OBJ_ADD; | |
410 | else | |
411 | action = SWITCHDEV_PORT_OBJ_DEL; | |
412 | ||
413 | err = br_switchdev_vlan_replay_group(nb, br_dev, br_vlan_group(br), | |
414 | ctx, action, extack); | |
415 | if (err) | |
416 | return err; | |
417 | ||
418 | list_for_each_entry(p, &br->port_list, list) { | |
419 | struct net_device *dev = p->dev; | |
420 | ||
421 | err = br_switchdev_vlan_replay_group(nb, dev, | |
422 | nbp_vlan_group(p), | |
423 | ctx, action, extack); | |
424 | if (err) | |
425 | return err; | |
426 | } | |
427 | ||
428 | return 0; | |
4a6849e4 VO |
429 | } |
430 | ||
9776457c | 431 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
326b212e | 432 | struct br_switchdev_mdb_complete_info { |
9776457c VO |
433 | struct net_bridge_port *port; |
434 | struct br_ip ip; | |
435 | }; | |
436 | ||
326b212e | 437 | static void br_switchdev_mdb_complete(struct net_device *dev, int err, void *priv) |
9776457c | 438 | { |
326b212e | 439 | struct br_switchdev_mdb_complete_info *data = priv; |
9776457c VO |
440 | struct net_bridge_port_group __rcu **pp; |
441 | struct net_bridge_port_group *p; | |
442 | struct net_bridge_mdb_entry *mp; | |
443 | struct net_bridge_port *port = data->port; | |
444 | struct net_bridge *br = port->br; | |
445 | ||
446 | if (err) | |
447 | goto err; | |
448 | ||
449 | spin_lock_bh(&br->multicast_lock); | |
450 | mp = br_mdb_ip_get(br, &data->ip); | |
451 | if (!mp) | |
452 | goto out; | |
453 | for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; | |
454 | pp = &p->next) { | |
455 | if (p->key.port != port) | |
456 | continue; | |
457 | p->flags |= MDB_PG_FLAGS_OFFLOAD; | |
458 | } | |
459 | out: | |
460 | spin_unlock_bh(&br->multicast_lock); | |
461 | err: | |
462 | kfree(priv); | |
463 | } | |
464 | ||
465 | static void br_switchdev_mdb_populate(struct switchdev_obj_port_mdb *mdb, | |
466 | const struct net_bridge_mdb_entry *mp) | |
467 | { | |
468 | if (mp->addr.proto == htons(ETH_P_IP)) | |
469 | ip_eth_mc_map(mp->addr.dst.ip4, mdb->addr); | |
470 | #if IS_ENABLED(CONFIG_IPV6) | |
471 | else if (mp->addr.proto == htons(ETH_P_IPV6)) | |
472 | ipv6_eth_mc_map(&mp->addr.dst.ip6, mdb->addr); | |
473 | #endif | |
474 | else | |
475 | ether_addr_copy(mdb->addr, mp->addr.dst.mac_addr); | |
476 | ||
477 | mdb->vid = mp->addr.vid; | |
478 | } | |
479 | ||
326b212e VO |
480 | static void br_switchdev_host_mdb_one(struct net_device *dev, |
481 | struct net_device *lower_dev, | |
482 | struct net_bridge_mdb_entry *mp, | |
483 | int type) | |
9776457c VO |
484 | { |
485 | struct switchdev_obj_port_mdb mdb = { | |
486 | .obj = { | |
487 | .id = SWITCHDEV_OBJ_ID_HOST_MDB, | |
488 | .flags = SWITCHDEV_F_DEFER, | |
489 | .orig_dev = dev, | |
490 | }, | |
491 | }; | |
492 | ||
493 | br_switchdev_mdb_populate(&mdb, mp); | |
494 | ||
495 | switch (type) { | |
496 | case RTM_NEWMDB: | |
497 | switchdev_port_obj_add(lower_dev, &mdb.obj, NULL); | |
498 | break; | |
499 | case RTM_DELMDB: | |
500 | switchdev_port_obj_del(lower_dev, &mdb.obj); | |
501 | break; | |
502 | } | |
503 | } | |
504 | ||
326b212e | 505 | static void br_switchdev_host_mdb(struct net_device *dev, |
9776457c VO |
506 | struct net_bridge_mdb_entry *mp, int type) |
507 | { | |
508 | struct net_device *lower_dev; | |
509 | struct list_head *iter; | |
510 | ||
511 | netdev_for_each_lower_dev(dev, lower_dev, iter) | |
326b212e | 512 | br_switchdev_host_mdb_one(dev, lower_dev, mp, type); |
9776457c VO |
513 | } |
514 | ||
326b212e VO |
515 | static int |
516 | br_switchdev_mdb_replay_one(struct notifier_block *nb, struct net_device *dev, | |
517 | const struct switchdev_obj_port_mdb *mdb, | |
518 | unsigned long action, const void *ctx, | |
519 | struct netlink_ext_ack *extack) | |
9776457c VO |
520 | { |
521 | struct switchdev_notifier_port_obj_info obj_info = { | |
522 | .info = { | |
523 | .dev = dev, | |
524 | .extack = extack, | |
525 | .ctx = ctx, | |
526 | }, | |
527 | .obj = &mdb->obj, | |
528 | }; | |
529 | int err; | |
530 | ||
531 | err = nb->notifier_call(nb, action, &obj_info); | |
532 | return notifier_to_errno(err); | |
533 | } | |
534 | ||
326b212e VO |
535 | static int br_switchdev_mdb_queue_one(struct list_head *mdb_list, |
536 | enum switchdev_obj_id id, | |
537 | const struct net_bridge_mdb_entry *mp, | |
538 | struct net_device *orig_dev) | |
9776457c VO |
539 | { |
540 | struct switchdev_obj_port_mdb *mdb; | |
541 | ||
542 | mdb = kzalloc(sizeof(*mdb), GFP_ATOMIC); | |
543 | if (!mdb) | |
544 | return -ENOMEM; | |
545 | ||
546 | mdb->obj.id = id; | |
547 | mdb->obj.orig_dev = orig_dev; | |
548 | br_switchdev_mdb_populate(mdb, mp); | |
549 | list_add_tail(&mdb->obj.list, mdb_list); | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | void br_switchdev_mdb_notify(struct net_device *dev, | |
555 | struct net_bridge_mdb_entry *mp, | |
556 | struct net_bridge_port_group *pg, | |
557 | int type) | |
558 | { | |
326b212e | 559 | struct br_switchdev_mdb_complete_info *complete_info; |
9776457c VO |
560 | struct switchdev_obj_port_mdb mdb = { |
561 | .obj = { | |
562 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
563 | .flags = SWITCHDEV_F_DEFER, | |
564 | }, | |
565 | }; | |
566 | ||
567 | if (!pg) | |
326b212e | 568 | return br_switchdev_host_mdb(dev, mp, type); |
9776457c VO |
569 | |
570 | br_switchdev_mdb_populate(&mdb, mp); | |
571 | ||
572 | mdb.obj.orig_dev = pg->key.port->dev; | |
573 | switch (type) { | |
574 | case RTM_NEWMDB: | |
575 | complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC); | |
576 | if (!complete_info) | |
577 | break; | |
578 | complete_info->port = pg->key.port; | |
579 | complete_info->ip = mp->addr; | |
580 | mdb.obj.complete_priv = complete_info; | |
326b212e | 581 | mdb.obj.complete = br_switchdev_mdb_complete; |
9776457c VO |
582 | if (switchdev_port_obj_add(pg->key.port->dev, &mdb.obj, NULL)) |
583 | kfree(complete_info); | |
584 | break; | |
585 | case RTM_DELMDB: | |
586 | switchdev_port_obj_del(pg->key.port->dev, &mdb.obj); | |
587 | break; | |
588 | } | |
589 | } | |
590 | #endif | |
591 | ||
326b212e VO |
592 | static int |
593 | br_switchdev_mdb_replay(struct net_device *br_dev, struct net_device *dev, | |
594 | const void *ctx, bool adding, struct notifier_block *nb, | |
595 | struct netlink_ext_ack *extack) | |
9776457c VO |
596 | { |
597 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING | |
598 | const struct net_bridge_mdb_entry *mp; | |
599 | struct switchdev_obj *obj, *tmp; | |
600 | struct net_bridge *br; | |
601 | unsigned long action; | |
602 | LIST_HEAD(mdb_list); | |
603 | int err = 0; | |
604 | ||
605 | ASSERT_RTNL(); | |
606 | ||
607 | if (!nb) | |
608 | return 0; | |
609 | ||
610 | if (!netif_is_bridge_master(br_dev) || !netif_is_bridge_port(dev)) | |
611 | return -EINVAL; | |
612 | ||
613 | br = netdev_priv(br_dev); | |
614 | ||
615 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
616 | return 0; | |
617 | ||
618 | /* We cannot walk over br->mdb_list protected just by the rtnl_mutex, | |
619 | * because the write-side protection is br->multicast_lock. But we | |
620 | * need to emulate the [ blocking ] calling context of a regular | |
621 | * switchdev event, so since both br->multicast_lock and RCU read side | |
622 | * critical sections are atomic, we have no choice but to pick the RCU | |
623 | * read side lock, queue up all our events, leave the critical section | |
624 | * and notify switchdev from blocking context. | |
625 | */ | |
626 | rcu_read_lock(); | |
627 | ||
628 | hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) { | |
629 | struct net_bridge_port_group __rcu * const *pp; | |
630 | const struct net_bridge_port_group *p; | |
631 | ||
632 | if (mp->host_joined) { | |
326b212e VO |
633 | err = br_switchdev_mdb_queue_one(&mdb_list, |
634 | SWITCHDEV_OBJ_ID_HOST_MDB, | |
635 | mp, br_dev); | |
9776457c VO |
636 | if (err) { |
637 | rcu_read_unlock(); | |
638 | goto out_free_mdb; | |
639 | } | |
640 | } | |
641 | ||
642 | for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL; | |
643 | pp = &p->next) { | |
644 | if (p->key.port->dev != dev) | |
645 | continue; | |
646 | ||
326b212e VO |
647 | err = br_switchdev_mdb_queue_one(&mdb_list, |
648 | SWITCHDEV_OBJ_ID_PORT_MDB, | |
649 | mp, dev); | |
9776457c VO |
650 | if (err) { |
651 | rcu_read_unlock(); | |
652 | goto out_free_mdb; | |
653 | } | |
654 | } | |
655 | } | |
656 | ||
657 | rcu_read_unlock(); | |
658 | ||
659 | if (adding) | |
660 | action = SWITCHDEV_PORT_OBJ_ADD; | |
661 | else | |
662 | action = SWITCHDEV_PORT_OBJ_DEL; | |
663 | ||
664 | list_for_each_entry(obj, &mdb_list, list) { | |
326b212e VO |
665 | err = br_switchdev_mdb_replay_one(nb, dev, |
666 | SWITCHDEV_OBJ_PORT_MDB(obj), | |
667 | action, ctx, extack); | |
9776457c VO |
668 | if (err) |
669 | goto out_free_mdb; | |
670 | } | |
671 | ||
672 | out_free_mdb: | |
673 | list_for_each_entry_safe(obj, tmp, &mdb_list, list) { | |
674 | list_del(&obj->list); | |
675 | kfree(SWITCHDEV_OBJ_PORT_MDB(obj)); | |
676 | } | |
677 | ||
678 | if (err) | |
679 | return err; | |
680 | #endif | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
4e51bf44 VO |
685 | static int nbp_switchdev_sync_objs(struct net_bridge_port *p, const void *ctx, |
686 | struct notifier_block *atomic_nb, | |
687 | struct notifier_block *blocking_nb, | |
688 | struct netlink_ext_ack *extack) | |
689 | { | |
690 | struct net_device *br_dev = p->br->dev; | |
691 | struct net_device *dev = p->dev; | |
692 | int err; | |
693 | ||
b28d580e | 694 | err = br_switchdev_vlan_replay(br_dev, ctx, true, blocking_nb, extack); |
4e51bf44 VO |
695 | if (err && err != -EOPNOTSUPP) |
696 | return err; | |
697 | ||
326b212e VO |
698 | err = br_switchdev_mdb_replay(br_dev, dev, ctx, true, blocking_nb, |
699 | extack); | |
4e51bf44 VO |
700 | if (err && err != -EOPNOTSUPP) |
701 | return err; | |
702 | ||
326b212e | 703 | err = br_switchdev_fdb_replay(br_dev, ctx, true, atomic_nb); |
4e51bf44 VO |
704 | if (err && err != -EOPNOTSUPP) |
705 | return err; | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | static void nbp_switchdev_unsync_objs(struct net_bridge_port *p, | |
711 | const void *ctx, | |
712 | struct notifier_block *atomic_nb, | |
713 | struct notifier_block *blocking_nb) | |
714 | { | |
715 | struct net_device *br_dev = p->br->dev; | |
716 | struct net_device *dev = p->dev; | |
717 | ||
263029ae | 718 | br_switchdev_fdb_replay(br_dev, ctx, false, atomic_nb); |
4e51bf44 | 719 | |
326b212e | 720 | br_switchdev_mdb_replay(br_dev, dev, ctx, false, blocking_nb, NULL); |
4e51bf44 | 721 | |
b28d580e | 722 | br_switchdev_vlan_replay(br_dev, ctx, false, blocking_nb, NULL); |
4e51bf44 VO |
723 | } |
724 | ||
2f5dc00f VO |
725 | /* Let the bridge know that this port is offloaded, so that it can assign a |
726 | * switchdev hardware domain to it. | |
727 | */ | |
957e2235 VO |
728 | int br_switchdev_port_offload(struct net_bridge_port *p, |
729 | struct net_device *dev, const void *ctx, | |
730 | struct notifier_block *atomic_nb, | |
731 | struct notifier_block *blocking_nb, | |
732 | bool tx_fwd_offload, | |
733 | struct netlink_ext_ack *extack) | |
2f5dc00f VO |
734 | { |
735 | struct netdev_phys_item_id ppid; | |
2f5dc00f VO |
736 | int err; |
737 | ||
2f5dc00f VO |
738 | err = dev_get_port_parent_id(dev, &ppid, false); |
739 | if (err) | |
740 | return err; | |
741 | ||
47211192 | 742 | err = nbp_switchdev_add(p, ppid, tx_fwd_offload, extack); |
4e51bf44 VO |
743 | if (err) |
744 | return err; | |
745 | ||
746 | err = nbp_switchdev_sync_objs(p, ctx, atomic_nb, blocking_nb, extack); | |
747 | if (err) | |
748 | goto out_switchdev_del; | |
749 | ||
750 | return 0; | |
751 | ||
752 | out_switchdev_del: | |
753 | nbp_switchdev_del(p); | |
754 | ||
755 | return err; | |
2f5dc00f | 756 | } |
2f5dc00f | 757 | |
957e2235 VO |
758 | void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, |
759 | struct notifier_block *atomic_nb, | |
760 | struct notifier_block *blocking_nb) | |
2f5dc00f | 761 | { |
4e51bf44 VO |
762 | nbp_switchdev_unsync_objs(p, ctx, atomic_nb, blocking_nb); |
763 | ||
2f5dc00f VO |
764 | nbp_switchdev_del(p); |
765 | } |