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3d249d4c JP |
1 | /* |
2 | * net/drivers/team/team.c - Network team device driver | |
3 | * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/rcupdate.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/ctype.h> | |
19 | #include <linux/notifier.h> | |
20 | #include <linux/netdevice.h> | |
87002b03 | 21 | #include <linux/if_vlan.h> |
3d249d4c JP |
22 | #include <linux/if_arp.h> |
23 | #include <linux/socket.h> | |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/rtnetlink.h> | |
26 | #include <net/rtnetlink.h> | |
27 | #include <net/genetlink.h> | |
28 | #include <net/netlink.h> | |
29 | #include <linux/if_team.h> | |
30 | ||
31 | #define DRV_NAME "team" | |
32 | ||
33 | ||
34 | /********** | |
35 | * Helpers | |
36 | **********/ | |
37 | ||
38 | #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT) | |
39 | ||
40 | static struct team_port *team_port_get_rcu(const struct net_device *dev) | |
41 | { | |
42 | struct team_port *port = rcu_dereference(dev->rx_handler_data); | |
43 | ||
44 | return team_port_exists(dev) ? port : NULL; | |
45 | } | |
46 | ||
47 | static struct team_port *team_port_get_rtnl(const struct net_device *dev) | |
48 | { | |
49 | struct team_port *port = rtnl_dereference(dev->rx_handler_data); | |
50 | ||
51 | return team_port_exists(dev) ? port : NULL; | |
52 | } | |
53 | ||
54 | /* | |
55 | * Since the ability to change mac address for open port device is tested in | |
56 | * team_port_add, this function can be called without control of return value | |
57 | */ | |
58 | static int __set_port_mac(struct net_device *port_dev, | |
59 | const unsigned char *dev_addr) | |
60 | { | |
61 | struct sockaddr addr; | |
62 | ||
63 | memcpy(addr.sa_data, dev_addr, ETH_ALEN); | |
64 | addr.sa_family = ARPHRD_ETHER; | |
65 | return dev_set_mac_address(port_dev, &addr); | |
66 | } | |
67 | ||
68 | int team_port_set_orig_mac(struct team_port *port) | |
69 | { | |
70 | return __set_port_mac(port->dev, port->orig.dev_addr); | |
71 | } | |
72 | ||
73 | int team_port_set_team_mac(struct team_port *port) | |
74 | { | |
75 | return __set_port_mac(port->dev, port->team->dev->dev_addr); | |
76 | } | |
77 | EXPORT_SYMBOL(team_port_set_team_mac); | |
78 | ||
79 | ||
80 | /******************* | |
81 | * Options handling | |
82 | *******************/ | |
83 | ||
358b8382 JP |
84 | struct team_option *__team_find_option(struct team *team, const char *opt_name) |
85 | { | |
86 | struct team_option *option; | |
87 | ||
88 | list_for_each_entry(option, &team->option_list, list) { | |
89 | if (strcmp(option->name, opt_name) == 0) | |
90 | return option; | |
91 | } | |
92 | return NULL; | |
93 | } | |
94 | ||
95 | int team_options_register(struct team *team, | |
96 | const struct team_option *option, | |
97 | size_t option_count) | |
3d249d4c JP |
98 | { |
99 | int i; | |
2bba19ff | 100 | struct team_option **dst_opts; |
358b8382 | 101 | int err; |
3d249d4c | 102 | |
2bba19ff JP |
103 | dst_opts = kzalloc(sizeof(struct team_option *) * option_count, |
104 | GFP_KERNEL); | |
105 | if (!dst_opts) | |
106 | return -ENOMEM; | |
358b8382 | 107 | for (i = 0; i < option_count; i++, option++) { |
358b8382 JP |
108 | if (__team_find_option(team, option->name)) { |
109 | err = -EEXIST; | |
110 | goto rollback; | |
111 | } | |
f8a15af0 JP |
112 | dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); |
113 | if (!dst_opts[i]) { | |
358b8382 JP |
114 | err = -ENOMEM; |
115 | goto rollback; | |
116 | } | |
358b8382 JP |
117 | } |
118 | ||
119 | for (i = 0; i < option_count; i++) | |
120 | list_add_tail(&dst_opts[i]->list, &team->option_list); | |
121 | ||
2bba19ff | 122 | kfree(dst_opts); |
358b8382 JP |
123 | return 0; |
124 | ||
125 | rollback: | |
126 | for (i = 0; i < option_count; i++) | |
127 | kfree(dst_opts[i]); | |
128 | ||
2bba19ff | 129 | kfree(dst_opts); |
358b8382 | 130 | return err; |
3d249d4c | 131 | } |
358b8382 | 132 | |
3d249d4c JP |
133 | EXPORT_SYMBOL(team_options_register); |
134 | ||
135 | static void __team_options_change_check(struct team *team, | |
136 | struct team_option *changed_option); | |
137 | ||
138 | static void __team_options_unregister(struct team *team, | |
358b8382 | 139 | const struct team_option *option, |
3d249d4c JP |
140 | size_t option_count) |
141 | { | |
142 | int i; | |
143 | ||
358b8382 JP |
144 | for (i = 0; i < option_count; i++, option++) { |
145 | struct team_option *del_opt; | |
146 | ||
147 | del_opt = __team_find_option(team, option->name); | |
148 | if (del_opt) { | |
149 | list_del(&del_opt->list); | |
150 | kfree(del_opt); | |
151 | } | |
152 | } | |
3d249d4c JP |
153 | } |
154 | ||
358b8382 JP |
155 | void team_options_unregister(struct team *team, |
156 | const struct team_option *option, | |
3d249d4c JP |
157 | size_t option_count) |
158 | { | |
159 | __team_options_unregister(team, option, option_count); | |
160 | __team_options_change_check(team, NULL); | |
161 | } | |
162 | EXPORT_SYMBOL(team_options_unregister); | |
163 | ||
164 | static int team_option_get(struct team *team, struct team_option *option, | |
165 | void *arg) | |
166 | { | |
167 | return option->getter(team, arg); | |
168 | } | |
169 | ||
170 | static int team_option_set(struct team *team, struct team_option *option, | |
171 | void *arg) | |
172 | { | |
173 | int err; | |
174 | ||
175 | err = option->setter(team, arg); | |
176 | if (err) | |
177 | return err; | |
178 | ||
179 | __team_options_change_check(team, option); | |
180 | return err; | |
181 | } | |
182 | ||
183 | /**************** | |
184 | * Mode handling | |
185 | ****************/ | |
186 | ||
187 | static LIST_HEAD(mode_list); | |
188 | static DEFINE_SPINLOCK(mode_list_lock); | |
189 | ||
190 | static struct team_mode *__find_mode(const char *kind) | |
191 | { | |
192 | struct team_mode *mode; | |
193 | ||
194 | list_for_each_entry(mode, &mode_list, list) { | |
195 | if (strcmp(mode->kind, kind) == 0) | |
196 | return mode; | |
197 | } | |
198 | return NULL; | |
199 | } | |
200 | ||
201 | static bool is_good_mode_name(const char *name) | |
202 | { | |
203 | while (*name != '\0') { | |
204 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
205 | return false; | |
206 | name++; | |
207 | } | |
208 | return true; | |
209 | } | |
210 | ||
211 | int team_mode_register(struct team_mode *mode) | |
212 | { | |
213 | int err = 0; | |
214 | ||
215 | if (!is_good_mode_name(mode->kind) || | |
216 | mode->priv_size > TEAM_MODE_PRIV_SIZE) | |
217 | return -EINVAL; | |
218 | spin_lock(&mode_list_lock); | |
219 | if (__find_mode(mode->kind)) { | |
220 | err = -EEXIST; | |
221 | goto unlock; | |
222 | } | |
223 | list_add_tail(&mode->list, &mode_list); | |
224 | unlock: | |
225 | spin_unlock(&mode_list_lock); | |
226 | return err; | |
227 | } | |
228 | EXPORT_SYMBOL(team_mode_register); | |
229 | ||
230 | int team_mode_unregister(struct team_mode *mode) | |
231 | { | |
232 | spin_lock(&mode_list_lock); | |
233 | list_del_init(&mode->list); | |
234 | spin_unlock(&mode_list_lock); | |
235 | return 0; | |
236 | } | |
237 | EXPORT_SYMBOL(team_mode_unregister); | |
238 | ||
239 | static struct team_mode *team_mode_get(const char *kind) | |
240 | { | |
241 | struct team_mode *mode; | |
242 | ||
243 | spin_lock(&mode_list_lock); | |
244 | mode = __find_mode(kind); | |
245 | if (!mode) { | |
246 | spin_unlock(&mode_list_lock); | |
247 | request_module("team-mode-%s", kind); | |
248 | spin_lock(&mode_list_lock); | |
249 | mode = __find_mode(kind); | |
250 | } | |
251 | if (mode) | |
252 | if (!try_module_get(mode->owner)) | |
253 | mode = NULL; | |
254 | ||
255 | spin_unlock(&mode_list_lock); | |
256 | return mode; | |
257 | } | |
258 | ||
259 | static void team_mode_put(const struct team_mode *mode) | |
260 | { | |
261 | module_put(mode->owner); | |
262 | } | |
263 | ||
264 | static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) | |
265 | { | |
266 | dev_kfree_skb_any(skb); | |
267 | return false; | |
268 | } | |
269 | ||
270 | rx_handler_result_t team_dummy_receive(struct team *team, | |
271 | struct team_port *port, | |
272 | struct sk_buff *skb) | |
273 | { | |
274 | return RX_HANDLER_ANOTHER; | |
275 | } | |
276 | ||
277 | static void team_adjust_ops(struct team *team) | |
278 | { | |
279 | /* | |
280 | * To avoid checks in rx/tx skb paths, ensure here that non-null and | |
281 | * correct ops are always set. | |
282 | */ | |
283 | ||
284 | if (list_empty(&team->port_list) || | |
285 | !team->mode || !team->mode->ops->transmit) | |
286 | team->ops.transmit = team_dummy_transmit; | |
287 | else | |
288 | team->ops.transmit = team->mode->ops->transmit; | |
289 | ||
290 | if (list_empty(&team->port_list) || | |
291 | !team->mode || !team->mode->ops->receive) | |
292 | team->ops.receive = team_dummy_receive; | |
293 | else | |
294 | team->ops.receive = team->mode->ops->receive; | |
295 | } | |
296 | ||
297 | /* | |
298 | * We can benefit from the fact that it's ensured no port is present | |
299 | * at the time of mode change. Therefore no packets are in fly so there's no | |
300 | * need to set mode operations in any special way. | |
301 | */ | |
302 | static int __team_change_mode(struct team *team, | |
303 | const struct team_mode *new_mode) | |
304 | { | |
305 | /* Check if mode was previously set and do cleanup if so */ | |
306 | if (team->mode) { | |
307 | void (*exit_op)(struct team *team) = team->ops.exit; | |
308 | ||
309 | /* Clear ops area so no callback is called any longer */ | |
310 | memset(&team->ops, 0, sizeof(struct team_mode_ops)); | |
311 | team_adjust_ops(team); | |
312 | ||
313 | if (exit_op) | |
314 | exit_op(team); | |
315 | team_mode_put(team->mode); | |
316 | team->mode = NULL; | |
317 | /* zero private data area */ | |
318 | memset(&team->mode_priv, 0, | |
319 | sizeof(struct team) - offsetof(struct team, mode_priv)); | |
320 | } | |
321 | ||
322 | if (!new_mode) | |
323 | return 0; | |
324 | ||
325 | if (new_mode->ops->init) { | |
326 | int err; | |
327 | ||
328 | err = new_mode->ops->init(team); | |
329 | if (err) | |
330 | return err; | |
331 | } | |
332 | ||
333 | team->mode = new_mode; | |
334 | memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); | |
335 | team_adjust_ops(team); | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | static int team_change_mode(struct team *team, const char *kind) | |
341 | { | |
342 | struct team_mode *new_mode; | |
343 | struct net_device *dev = team->dev; | |
344 | int err; | |
345 | ||
346 | if (!list_empty(&team->port_list)) { | |
347 | netdev_err(dev, "No ports can be present during mode change\n"); | |
348 | return -EBUSY; | |
349 | } | |
350 | ||
351 | if (team->mode && strcmp(team->mode->kind, kind) == 0) { | |
352 | netdev_err(dev, "Unable to change to the same mode the team is in\n"); | |
353 | return -EINVAL; | |
354 | } | |
355 | ||
356 | new_mode = team_mode_get(kind); | |
357 | if (!new_mode) { | |
358 | netdev_err(dev, "Mode \"%s\" not found\n", kind); | |
359 | return -EINVAL; | |
360 | } | |
361 | ||
362 | err = __team_change_mode(team, new_mode); | |
363 | if (err) { | |
364 | netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); | |
365 | team_mode_put(new_mode); | |
366 | return err; | |
367 | } | |
368 | ||
369 | netdev_info(dev, "Mode changed to \"%s\"\n", kind); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | ||
374 | /************************ | |
375 | * Rx path frame handler | |
376 | ************************/ | |
377 | ||
378 | /* note: already called with rcu_read_lock */ | |
379 | static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) | |
380 | { | |
381 | struct sk_buff *skb = *pskb; | |
382 | struct team_port *port; | |
383 | struct team *team; | |
384 | rx_handler_result_t res; | |
385 | ||
386 | skb = skb_share_check(skb, GFP_ATOMIC); | |
387 | if (!skb) | |
388 | return RX_HANDLER_CONSUMED; | |
389 | ||
390 | *pskb = skb; | |
391 | ||
392 | port = team_port_get_rcu(skb->dev); | |
393 | team = port->team; | |
394 | ||
395 | res = team->ops.receive(team, port, skb); | |
396 | if (res == RX_HANDLER_ANOTHER) { | |
397 | struct team_pcpu_stats *pcpu_stats; | |
398 | ||
399 | pcpu_stats = this_cpu_ptr(team->pcpu_stats); | |
400 | u64_stats_update_begin(&pcpu_stats->syncp); | |
401 | pcpu_stats->rx_packets++; | |
402 | pcpu_stats->rx_bytes += skb->len; | |
403 | if (skb->pkt_type == PACKET_MULTICAST) | |
404 | pcpu_stats->rx_multicast++; | |
405 | u64_stats_update_end(&pcpu_stats->syncp); | |
406 | ||
407 | skb->dev = team->dev; | |
408 | } else { | |
409 | this_cpu_inc(team->pcpu_stats->rx_dropped); | |
410 | } | |
411 | ||
412 | return res; | |
413 | } | |
414 | ||
415 | ||
416 | /**************** | |
417 | * Port handling | |
418 | ****************/ | |
419 | ||
420 | static bool team_port_find(const struct team *team, | |
421 | const struct team_port *port) | |
422 | { | |
423 | struct team_port *cur; | |
424 | ||
425 | list_for_each_entry(cur, &team->port_list, list) | |
426 | if (cur == port) | |
427 | return true; | |
428 | return false; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Add/delete port to the team port list. Write guarded by rtnl_lock. | |
433 | * Takes care of correct port->index setup (might be racy). | |
434 | */ | |
435 | static void team_port_list_add_port(struct team *team, | |
436 | struct team_port *port) | |
437 | { | |
438 | port->index = team->port_count++; | |
439 | hlist_add_head_rcu(&port->hlist, | |
440 | team_port_index_hash(team, port->index)); | |
441 | list_add_tail_rcu(&port->list, &team->port_list); | |
442 | } | |
443 | ||
444 | static void __reconstruct_port_hlist(struct team *team, int rm_index) | |
445 | { | |
446 | int i; | |
447 | struct team_port *port; | |
448 | ||
449 | for (i = rm_index + 1; i < team->port_count; i++) { | |
450 | port = team_get_port_by_index(team, i); | |
451 | hlist_del_rcu(&port->hlist); | |
452 | port->index--; | |
453 | hlist_add_head_rcu(&port->hlist, | |
454 | team_port_index_hash(team, port->index)); | |
455 | } | |
456 | } | |
457 | ||
458 | static void team_port_list_del_port(struct team *team, | |
459 | struct team_port *port) | |
460 | { | |
461 | int rm_index = port->index; | |
462 | ||
463 | hlist_del_rcu(&port->hlist); | |
464 | list_del_rcu(&port->list); | |
465 | __reconstruct_port_hlist(team, rm_index); | |
466 | team->port_count--; | |
467 | } | |
468 | ||
469 | #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ | |
470 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
471 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
472 | ||
473 | static void __team_compute_features(struct team *team) | |
474 | { | |
475 | struct team_port *port; | |
476 | u32 vlan_features = TEAM_VLAN_FEATURES; | |
477 | unsigned short max_hard_header_len = ETH_HLEN; | |
478 | ||
479 | list_for_each_entry(port, &team->port_list, list) { | |
480 | vlan_features = netdev_increment_features(vlan_features, | |
481 | port->dev->vlan_features, | |
482 | TEAM_VLAN_FEATURES); | |
483 | ||
484 | if (port->dev->hard_header_len > max_hard_header_len) | |
485 | max_hard_header_len = port->dev->hard_header_len; | |
486 | } | |
487 | ||
488 | team->dev->vlan_features = vlan_features; | |
489 | team->dev->hard_header_len = max_hard_header_len; | |
490 | ||
491 | netdev_change_features(team->dev); | |
492 | } | |
493 | ||
494 | static void team_compute_features(struct team *team) | |
495 | { | |
61dc3461 | 496 | mutex_lock(&team->lock); |
3d249d4c | 497 | __team_compute_features(team); |
61dc3461 | 498 | mutex_unlock(&team->lock); |
3d249d4c JP |
499 | } |
500 | ||
501 | static int team_port_enter(struct team *team, struct team_port *port) | |
502 | { | |
503 | int err = 0; | |
504 | ||
505 | dev_hold(team->dev); | |
506 | port->dev->priv_flags |= IFF_TEAM_PORT; | |
507 | if (team->ops.port_enter) { | |
508 | err = team->ops.port_enter(team, port); | |
509 | if (err) { | |
510 | netdev_err(team->dev, "Device %s failed to enter team mode\n", | |
511 | port->dev->name); | |
512 | goto err_port_enter; | |
513 | } | |
514 | } | |
515 | ||
516 | return 0; | |
517 | ||
518 | err_port_enter: | |
519 | port->dev->priv_flags &= ~IFF_TEAM_PORT; | |
520 | dev_put(team->dev); | |
521 | ||
522 | return err; | |
523 | } | |
524 | ||
525 | static void team_port_leave(struct team *team, struct team_port *port) | |
526 | { | |
527 | if (team->ops.port_leave) | |
528 | team->ops.port_leave(team, port); | |
529 | port->dev->priv_flags &= ~IFF_TEAM_PORT; | |
530 | dev_put(team->dev); | |
531 | } | |
532 | ||
533 | static void __team_port_change_check(struct team_port *port, bool linkup); | |
534 | ||
535 | static int team_port_add(struct team *team, struct net_device *port_dev) | |
536 | { | |
537 | struct net_device *dev = team->dev; | |
538 | struct team_port *port; | |
539 | char *portname = port_dev->name; | |
540 | int err; | |
541 | ||
542 | if (port_dev->flags & IFF_LOOPBACK || | |
543 | port_dev->type != ARPHRD_ETHER) { | |
544 | netdev_err(dev, "Device %s is of an unsupported type\n", | |
545 | portname); | |
546 | return -EINVAL; | |
547 | } | |
548 | ||
549 | if (team_port_exists(port_dev)) { | |
550 | netdev_err(dev, "Device %s is already a port " | |
551 | "of a team device\n", portname); | |
552 | return -EBUSY; | |
553 | } | |
554 | ||
555 | if (port_dev->flags & IFF_UP) { | |
556 | netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", | |
557 | portname); | |
558 | return -EBUSY; | |
559 | } | |
560 | ||
561 | port = kzalloc(sizeof(struct team_port), GFP_KERNEL); | |
562 | if (!port) | |
563 | return -ENOMEM; | |
564 | ||
565 | port->dev = port_dev; | |
566 | port->team = team; | |
567 | ||
568 | port->orig.mtu = port_dev->mtu; | |
569 | err = dev_set_mtu(port_dev, dev->mtu); | |
570 | if (err) { | |
571 | netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); | |
572 | goto err_set_mtu; | |
573 | } | |
574 | ||
575 | memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN); | |
576 | ||
577 | err = team_port_enter(team, port); | |
578 | if (err) { | |
579 | netdev_err(dev, "Device %s failed to enter team mode\n", | |
580 | portname); | |
581 | goto err_port_enter; | |
582 | } | |
583 | ||
584 | err = dev_open(port_dev); | |
585 | if (err) { | |
586 | netdev_dbg(dev, "Device %s opening failed\n", | |
587 | portname); | |
588 | goto err_dev_open; | |
589 | } | |
590 | ||
591 | err = netdev_set_master(port_dev, dev); | |
592 | if (err) { | |
593 | netdev_err(dev, "Device %s failed to set master\n", portname); | |
594 | goto err_set_master; | |
595 | } | |
596 | ||
597 | err = netdev_rx_handler_register(port_dev, team_handle_frame, | |
598 | port); | |
599 | if (err) { | |
600 | netdev_err(dev, "Device %s failed to register rx_handler\n", | |
601 | portname); | |
602 | goto err_handler_register; | |
603 | } | |
604 | ||
605 | team_port_list_add_port(team, port); | |
606 | team_adjust_ops(team); | |
607 | __team_compute_features(team); | |
608 | __team_port_change_check(port, !!netif_carrier_ok(port_dev)); | |
609 | ||
610 | netdev_info(dev, "Port device %s added\n", portname); | |
611 | ||
612 | return 0; | |
613 | ||
614 | err_handler_register: | |
615 | netdev_set_master(port_dev, NULL); | |
616 | ||
617 | err_set_master: | |
618 | dev_close(port_dev); | |
619 | ||
620 | err_dev_open: | |
621 | team_port_leave(team, port); | |
622 | team_port_set_orig_mac(port); | |
623 | ||
624 | err_port_enter: | |
625 | dev_set_mtu(port_dev, port->orig.mtu); | |
626 | ||
627 | err_set_mtu: | |
628 | kfree(port); | |
629 | ||
630 | return err; | |
631 | } | |
632 | ||
633 | static int team_port_del(struct team *team, struct net_device *port_dev) | |
634 | { | |
635 | struct net_device *dev = team->dev; | |
636 | struct team_port *port; | |
637 | char *portname = port_dev->name; | |
638 | ||
639 | port = team_port_get_rtnl(port_dev); | |
640 | if (!port || !team_port_find(team, port)) { | |
641 | netdev_err(dev, "Device %s does not act as a port of this team\n", | |
642 | portname); | |
643 | return -ENOENT; | |
644 | } | |
645 | ||
646 | __team_port_change_check(port, false); | |
647 | team_port_list_del_port(team, port); | |
648 | team_adjust_ops(team); | |
649 | netdev_rx_handler_unregister(port_dev); | |
650 | netdev_set_master(port_dev, NULL); | |
651 | dev_close(port_dev); | |
652 | team_port_leave(team, port); | |
653 | team_port_set_orig_mac(port); | |
654 | dev_set_mtu(port_dev, port->orig.mtu); | |
655 | synchronize_rcu(); | |
656 | kfree(port); | |
657 | netdev_info(dev, "Port device %s removed\n", portname); | |
658 | __team_compute_features(team); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | ||
664 | /***************** | |
665 | * Net device ops | |
666 | *****************/ | |
667 | ||
668 | static const char team_no_mode_kind[] = "*NOMODE*"; | |
669 | ||
670 | static int team_mode_option_get(struct team *team, void *arg) | |
671 | { | |
672 | const char **str = arg; | |
673 | ||
674 | *str = team->mode ? team->mode->kind : team_no_mode_kind; | |
675 | return 0; | |
676 | } | |
677 | ||
678 | static int team_mode_option_set(struct team *team, void *arg) | |
679 | { | |
680 | const char **str = arg; | |
681 | ||
682 | return team_change_mode(team, *str); | |
683 | } | |
684 | ||
358b8382 | 685 | static const struct team_option team_options[] = { |
3d249d4c JP |
686 | { |
687 | .name = "mode", | |
688 | .type = TEAM_OPTION_TYPE_STRING, | |
689 | .getter = team_mode_option_get, | |
690 | .setter = team_mode_option_set, | |
691 | }, | |
692 | }; | |
693 | ||
694 | static int team_init(struct net_device *dev) | |
695 | { | |
696 | struct team *team = netdev_priv(dev); | |
697 | int i; | |
358b8382 | 698 | int err; |
3d249d4c JP |
699 | |
700 | team->dev = dev; | |
61dc3461 | 701 | mutex_init(&team->lock); |
3d249d4c JP |
702 | |
703 | team->pcpu_stats = alloc_percpu(struct team_pcpu_stats); | |
704 | if (!team->pcpu_stats) | |
705 | return -ENOMEM; | |
706 | ||
707 | for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) | |
708 | INIT_HLIST_HEAD(&team->port_hlist[i]); | |
709 | INIT_LIST_HEAD(&team->port_list); | |
710 | ||
711 | team_adjust_ops(team); | |
712 | ||
713 | INIT_LIST_HEAD(&team->option_list); | |
358b8382 JP |
714 | err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); |
715 | if (err) | |
716 | goto err_options_register; | |
3d249d4c JP |
717 | netif_carrier_off(dev); |
718 | ||
719 | return 0; | |
358b8382 JP |
720 | |
721 | err_options_register: | |
722 | free_percpu(team->pcpu_stats); | |
723 | ||
724 | return err; | |
3d249d4c JP |
725 | } |
726 | ||
727 | static void team_uninit(struct net_device *dev) | |
728 | { | |
729 | struct team *team = netdev_priv(dev); | |
730 | struct team_port *port; | |
731 | struct team_port *tmp; | |
732 | ||
61dc3461 | 733 | mutex_lock(&team->lock); |
3d249d4c JP |
734 | list_for_each_entry_safe(port, tmp, &team->port_list, list) |
735 | team_port_del(team, port->dev); | |
736 | ||
737 | __team_change_mode(team, NULL); /* cleanup */ | |
738 | __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); | |
61dc3461 | 739 | mutex_unlock(&team->lock); |
3d249d4c JP |
740 | } |
741 | ||
742 | static void team_destructor(struct net_device *dev) | |
743 | { | |
744 | struct team *team = netdev_priv(dev); | |
745 | ||
746 | free_percpu(team->pcpu_stats); | |
747 | free_netdev(dev); | |
748 | } | |
749 | ||
750 | static int team_open(struct net_device *dev) | |
751 | { | |
752 | netif_carrier_on(dev); | |
753 | return 0; | |
754 | } | |
755 | ||
756 | static int team_close(struct net_device *dev) | |
757 | { | |
758 | netif_carrier_off(dev); | |
759 | return 0; | |
760 | } | |
761 | ||
762 | /* | |
763 | * note: already called with rcu_read_lock | |
764 | */ | |
765 | static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) | |
766 | { | |
767 | struct team *team = netdev_priv(dev); | |
768 | bool tx_success = false; | |
769 | unsigned int len = skb->len; | |
770 | ||
771 | tx_success = team->ops.transmit(team, skb); | |
772 | if (tx_success) { | |
773 | struct team_pcpu_stats *pcpu_stats; | |
774 | ||
775 | pcpu_stats = this_cpu_ptr(team->pcpu_stats); | |
776 | u64_stats_update_begin(&pcpu_stats->syncp); | |
777 | pcpu_stats->tx_packets++; | |
778 | pcpu_stats->tx_bytes += len; | |
779 | u64_stats_update_end(&pcpu_stats->syncp); | |
780 | } else { | |
781 | this_cpu_inc(team->pcpu_stats->tx_dropped); | |
782 | } | |
783 | ||
784 | return NETDEV_TX_OK; | |
785 | } | |
786 | ||
787 | static void team_change_rx_flags(struct net_device *dev, int change) | |
788 | { | |
789 | struct team *team = netdev_priv(dev); | |
790 | struct team_port *port; | |
791 | int inc; | |
792 | ||
793 | rcu_read_lock(); | |
794 | list_for_each_entry_rcu(port, &team->port_list, list) { | |
795 | if (change & IFF_PROMISC) { | |
796 | inc = dev->flags & IFF_PROMISC ? 1 : -1; | |
797 | dev_set_promiscuity(port->dev, inc); | |
798 | } | |
799 | if (change & IFF_ALLMULTI) { | |
800 | inc = dev->flags & IFF_ALLMULTI ? 1 : -1; | |
801 | dev_set_allmulti(port->dev, inc); | |
802 | } | |
803 | } | |
804 | rcu_read_unlock(); | |
805 | } | |
806 | ||
807 | static void team_set_rx_mode(struct net_device *dev) | |
808 | { | |
809 | struct team *team = netdev_priv(dev); | |
810 | struct team_port *port; | |
811 | ||
812 | rcu_read_lock(); | |
813 | list_for_each_entry_rcu(port, &team->port_list, list) { | |
814 | dev_uc_sync(port->dev, dev); | |
815 | dev_mc_sync(port->dev, dev); | |
816 | } | |
817 | rcu_read_unlock(); | |
818 | } | |
819 | ||
820 | static int team_set_mac_address(struct net_device *dev, void *p) | |
821 | { | |
822 | struct team *team = netdev_priv(dev); | |
823 | struct team_port *port; | |
824 | struct sockaddr *addr = p; | |
825 | ||
826 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
827 | rcu_read_lock(); | |
828 | list_for_each_entry_rcu(port, &team->port_list, list) | |
829 | if (team->ops.port_change_mac) | |
830 | team->ops.port_change_mac(team, port); | |
831 | rcu_read_unlock(); | |
832 | return 0; | |
833 | } | |
834 | ||
835 | static int team_change_mtu(struct net_device *dev, int new_mtu) | |
836 | { | |
837 | struct team *team = netdev_priv(dev); | |
838 | struct team_port *port; | |
839 | int err; | |
840 | ||
841 | /* | |
842 | * Alhough this is reader, it's guarded by team lock. It's not possible | |
843 | * to traverse list in reverse under rcu_read_lock | |
844 | */ | |
61dc3461 | 845 | mutex_lock(&team->lock); |
3d249d4c JP |
846 | list_for_each_entry(port, &team->port_list, list) { |
847 | err = dev_set_mtu(port->dev, new_mtu); | |
848 | if (err) { | |
849 | netdev_err(dev, "Device %s failed to change mtu", | |
850 | port->dev->name); | |
851 | goto unwind; | |
852 | } | |
853 | } | |
61dc3461 | 854 | mutex_unlock(&team->lock); |
3d249d4c JP |
855 | |
856 | dev->mtu = new_mtu; | |
857 | ||
858 | return 0; | |
859 | ||
860 | unwind: | |
861 | list_for_each_entry_continue_reverse(port, &team->port_list, list) | |
862 | dev_set_mtu(port->dev, dev->mtu); | |
61dc3461 | 863 | mutex_unlock(&team->lock); |
3d249d4c JP |
864 | |
865 | return err; | |
866 | } | |
867 | ||
868 | static struct rtnl_link_stats64 * | |
869 | team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) | |
870 | { | |
871 | struct team *team = netdev_priv(dev); | |
872 | struct team_pcpu_stats *p; | |
873 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
874 | u32 rx_dropped = 0, tx_dropped = 0; | |
875 | unsigned int start; | |
876 | int i; | |
877 | ||
878 | for_each_possible_cpu(i) { | |
879 | p = per_cpu_ptr(team->pcpu_stats, i); | |
880 | do { | |
881 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
882 | rx_packets = p->rx_packets; | |
883 | rx_bytes = p->rx_bytes; | |
884 | rx_multicast = p->rx_multicast; | |
885 | tx_packets = p->tx_packets; | |
886 | tx_bytes = p->tx_bytes; | |
887 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); | |
888 | ||
889 | stats->rx_packets += rx_packets; | |
890 | stats->rx_bytes += rx_bytes; | |
891 | stats->multicast += rx_multicast; | |
892 | stats->tx_packets += tx_packets; | |
893 | stats->tx_bytes += tx_bytes; | |
894 | /* | |
895 | * rx_dropped & tx_dropped are u32, updated | |
896 | * without syncp protection. | |
897 | */ | |
898 | rx_dropped += p->rx_dropped; | |
899 | tx_dropped += p->tx_dropped; | |
900 | } | |
901 | stats->rx_dropped = rx_dropped; | |
902 | stats->tx_dropped = tx_dropped; | |
903 | return stats; | |
904 | } | |
905 | ||
8e586137 | 906 | static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid) |
3d249d4c JP |
907 | { |
908 | struct team *team = netdev_priv(dev); | |
909 | struct team_port *port; | |
87002b03 | 910 | int err; |
3d249d4c | 911 | |
87002b03 JP |
912 | /* |
913 | * Alhough this is reader, it's guarded by team lock. It's not possible | |
914 | * to traverse list in reverse under rcu_read_lock | |
915 | */ | |
916 | mutex_lock(&team->lock); | |
917 | list_for_each_entry(port, &team->port_list, list) { | |
918 | err = vlan_vid_add(port->dev, vid); | |
919 | if (err) | |
920 | goto unwind; | |
3d249d4c | 921 | } |
87002b03 | 922 | mutex_unlock(&team->lock); |
8e586137 JP |
923 | |
924 | return 0; | |
87002b03 JP |
925 | |
926 | unwind: | |
927 | list_for_each_entry_continue_reverse(port, &team->port_list, list) | |
928 | vlan_vid_del(port->dev, vid); | |
929 | mutex_unlock(&team->lock); | |
930 | ||
931 | return err; | |
3d249d4c JP |
932 | } |
933 | ||
8e586137 | 934 | static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid) |
3d249d4c JP |
935 | { |
936 | struct team *team = netdev_priv(dev); | |
937 | struct team_port *port; | |
938 | ||
939 | rcu_read_lock(); | |
87002b03 JP |
940 | list_for_each_entry_rcu(port, &team->port_list, list) |
941 | vlan_vid_del(port->dev, vid); | |
3d249d4c | 942 | rcu_read_unlock(); |
8e586137 JP |
943 | |
944 | return 0; | |
3d249d4c JP |
945 | } |
946 | ||
947 | static int team_add_slave(struct net_device *dev, struct net_device *port_dev) | |
948 | { | |
949 | struct team *team = netdev_priv(dev); | |
950 | int err; | |
951 | ||
61dc3461 | 952 | mutex_lock(&team->lock); |
3d249d4c | 953 | err = team_port_add(team, port_dev); |
61dc3461 | 954 | mutex_unlock(&team->lock); |
3d249d4c JP |
955 | return err; |
956 | } | |
957 | ||
958 | static int team_del_slave(struct net_device *dev, struct net_device *port_dev) | |
959 | { | |
960 | struct team *team = netdev_priv(dev); | |
961 | int err; | |
962 | ||
61dc3461 | 963 | mutex_lock(&team->lock); |
3d249d4c | 964 | err = team_port_del(team, port_dev); |
61dc3461 | 965 | mutex_unlock(&team->lock); |
3d249d4c JP |
966 | return err; |
967 | } | |
968 | ||
234a8fd4 JP |
969 | static netdev_features_t team_fix_features(struct net_device *dev, |
970 | netdev_features_t features) | |
971 | { | |
972 | struct team_port *port; | |
973 | struct team *team = netdev_priv(dev); | |
974 | netdev_features_t mask; | |
975 | ||
976 | mask = features; | |
977 | features &= ~NETIF_F_ONE_FOR_ALL; | |
978 | features |= NETIF_F_ALL_FOR_ALL; | |
979 | ||
980 | rcu_read_lock(); | |
981 | list_for_each_entry_rcu(port, &team->port_list, list) { | |
982 | features = netdev_increment_features(features, | |
983 | port->dev->features, | |
984 | mask); | |
985 | } | |
986 | rcu_read_unlock(); | |
987 | return features; | |
988 | } | |
989 | ||
3d249d4c JP |
990 | static const struct net_device_ops team_netdev_ops = { |
991 | .ndo_init = team_init, | |
992 | .ndo_uninit = team_uninit, | |
993 | .ndo_open = team_open, | |
994 | .ndo_stop = team_close, | |
995 | .ndo_start_xmit = team_xmit, | |
996 | .ndo_change_rx_flags = team_change_rx_flags, | |
997 | .ndo_set_rx_mode = team_set_rx_mode, | |
998 | .ndo_set_mac_address = team_set_mac_address, | |
999 | .ndo_change_mtu = team_change_mtu, | |
1000 | .ndo_get_stats64 = team_get_stats64, | |
1001 | .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, | |
1002 | .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, | |
1003 | .ndo_add_slave = team_add_slave, | |
1004 | .ndo_del_slave = team_del_slave, | |
234a8fd4 | 1005 | .ndo_fix_features = team_fix_features, |
3d249d4c JP |
1006 | }; |
1007 | ||
1008 | ||
1009 | /*********************** | |
1010 | * rt netlink interface | |
1011 | ***********************/ | |
1012 | ||
1013 | static void team_setup(struct net_device *dev) | |
1014 | { | |
1015 | ether_setup(dev); | |
1016 | ||
1017 | dev->netdev_ops = &team_netdev_ops; | |
1018 | dev->destructor = team_destructor; | |
1019 | dev->tx_queue_len = 0; | |
1020 | dev->flags |= IFF_MULTICAST; | |
1021 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
1022 | ||
1023 | /* | |
1024 | * Indicate we support unicast address filtering. That way core won't | |
1025 | * bring us to promisc mode in case a unicast addr is added. | |
1026 | * Let this up to underlay drivers. | |
1027 | */ | |
1028 | dev->priv_flags |= IFF_UNICAST_FLT; | |
1029 | ||
1030 | dev->features |= NETIF_F_LLTX; | |
1031 | dev->features |= NETIF_F_GRO; | |
1032 | dev->hw_features = NETIF_F_HW_VLAN_TX | | |
1033 | NETIF_F_HW_VLAN_RX | | |
1034 | NETIF_F_HW_VLAN_FILTER; | |
1035 | ||
1036 | dev->features |= dev->hw_features; | |
1037 | } | |
1038 | ||
1039 | static int team_newlink(struct net *src_net, struct net_device *dev, | |
1040 | struct nlattr *tb[], struct nlattr *data[]) | |
1041 | { | |
1042 | int err; | |
1043 | ||
1044 | if (tb[IFLA_ADDRESS] == NULL) | |
1045 | random_ether_addr(dev->dev_addr); | |
1046 | ||
1047 | err = register_netdevice(dev); | |
1048 | if (err) | |
1049 | return err; | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | static int team_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1055 | { | |
1056 | if (tb[IFLA_ADDRESS]) { | |
1057 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1058 | return -EINVAL; | |
1059 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1060 | return -EADDRNOTAVAIL; | |
1061 | } | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static struct rtnl_link_ops team_link_ops __read_mostly = { | |
1066 | .kind = DRV_NAME, | |
1067 | .priv_size = sizeof(struct team), | |
1068 | .setup = team_setup, | |
1069 | .newlink = team_newlink, | |
1070 | .validate = team_validate, | |
1071 | }; | |
1072 | ||
1073 | ||
1074 | /*********************************** | |
1075 | * Generic netlink custom interface | |
1076 | ***********************************/ | |
1077 | ||
1078 | static struct genl_family team_nl_family = { | |
1079 | .id = GENL_ID_GENERATE, | |
1080 | .name = TEAM_GENL_NAME, | |
1081 | .version = TEAM_GENL_VERSION, | |
1082 | .maxattr = TEAM_ATTR_MAX, | |
1083 | .netnsok = true, | |
1084 | }; | |
1085 | ||
1086 | static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { | |
1087 | [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, | |
1088 | [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, | |
1089 | [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, | |
1090 | [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, | |
1091 | }; | |
1092 | ||
1093 | static const struct nla_policy | |
1094 | team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { | |
1095 | [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, | |
1096 | [TEAM_ATTR_OPTION_NAME] = { | |
1097 | .type = NLA_STRING, | |
1098 | .len = TEAM_STRING_MAX_LEN, | |
1099 | }, | |
1100 | [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, | |
1101 | [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, | |
1102 | [TEAM_ATTR_OPTION_DATA] = { | |
1103 | .type = NLA_BINARY, | |
1104 | .len = TEAM_STRING_MAX_LEN, | |
1105 | }, | |
1106 | }; | |
1107 | ||
1108 | static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) | |
1109 | { | |
1110 | struct sk_buff *msg; | |
1111 | void *hdr; | |
1112 | int err; | |
1113 | ||
1114 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1115 | if (!msg) | |
1116 | return -ENOMEM; | |
1117 | ||
1118 | hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, | |
1119 | &team_nl_family, 0, TEAM_CMD_NOOP); | |
1120 | if (IS_ERR(hdr)) { | |
1121 | err = PTR_ERR(hdr); | |
1122 | goto err_msg_put; | |
1123 | } | |
1124 | ||
1125 | genlmsg_end(msg, hdr); | |
1126 | ||
1127 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); | |
1128 | ||
1129 | err_msg_put: | |
1130 | nlmsg_free(msg); | |
1131 | ||
1132 | return err; | |
1133 | } | |
1134 | ||
1135 | /* | |
1136 | * Netlink cmd functions should be locked by following two functions. | |
8c0713a5 | 1137 | * Since dev gets held here, that ensures dev won't disappear in between. |
3d249d4c JP |
1138 | */ |
1139 | static struct team *team_nl_team_get(struct genl_info *info) | |
1140 | { | |
1141 | struct net *net = genl_info_net(info); | |
1142 | int ifindex; | |
1143 | struct net_device *dev; | |
1144 | struct team *team; | |
1145 | ||
1146 | if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) | |
1147 | return NULL; | |
1148 | ||
1149 | ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); | |
8c0713a5 | 1150 | dev = dev_get_by_index(net, ifindex); |
3d249d4c | 1151 | if (!dev || dev->netdev_ops != &team_netdev_ops) { |
8c0713a5 JP |
1152 | if (dev) |
1153 | dev_put(dev); | |
3d249d4c JP |
1154 | return NULL; |
1155 | } | |
1156 | ||
1157 | team = netdev_priv(dev); | |
61dc3461 | 1158 | mutex_lock(&team->lock); |
3d249d4c JP |
1159 | return team; |
1160 | } | |
1161 | ||
1162 | static void team_nl_team_put(struct team *team) | |
1163 | { | |
61dc3461 | 1164 | mutex_unlock(&team->lock); |
8c0713a5 | 1165 | dev_put(team->dev); |
3d249d4c JP |
1166 | } |
1167 | ||
1168 | static int team_nl_send_generic(struct genl_info *info, struct team *team, | |
1169 | int (*fill_func)(struct sk_buff *skb, | |
1170 | struct genl_info *info, | |
1171 | int flags, struct team *team)) | |
1172 | { | |
1173 | struct sk_buff *skb; | |
1174 | int err; | |
1175 | ||
1176 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1177 | if (!skb) | |
1178 | return -ENOMEM; | |
1179 | ||
1180 | err = fill_func(skb, info, NLM_F_ACK, team); | |
1181 | if (err < 0) | |
1182 | goto err_fill; | |
1183 | ||
1184 | err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid); | |
1185 | return err; | |
1186 | ||
1187 | err_fill: | |
1188 | nlmsg_free(skb); | |
1189 | return err; | |
1190 | } | |
1191 | ||
1192 | static int team_nl_fill_options_get_changed(struct sk_buff *skb, | |
1193 | u32 pid, u32 seq, int flags, | |
1194 | struct team *team, | |
1195 | struct team_option *changed_option) | |
1196 | { | |
1197 | struct nlattr *option_list; | |
1198 | void *hdr; | |
1199 | struct team_option *option; | |
1200 | ||
1201 | hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, | |
1202 | TEAM_CMD_OPTIONS_GET); | |
1203 | if (IS_ERR(hdr)) | |
1204 | return PTR_ERR(hdr); | |
1205 | ||
1206 | NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex); | |
1207 | option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); | |
1208 | if (!option_list) | |
1209 | return -EMSGSIZE; | |
1210 | ||
1211 | list_for_each_entry(option, &team->option_list, list) { | |
1212 | struct nlattr *option_item; | |
1213 | long arg; | |
1214 | ||
1215 | option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); | |
1216 | if (!option_item) | |
1217 | goto nla_put_failure; | |
1218 | NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name); | |
1219 | if (option == changed_option) | |
1220 | NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED); | |
1221 | switch (option->type) { | |
1222 | case TEAM_OPTION_TYPE_U32: | |
1223 | NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32); | |
1224 | team_option_get(team, option, &arg); | |
1225 | NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg); | |
1226 | break; | |
1227 | case TEAM_OPTION_TYPE_STRING: | |
1228 | NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING); | |
1229 | team_option_get(team, option, &arg); | |
1230 | NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA, | |
1231 | (char *) arg); | |
1232 | break; | |
1233 | default: | |
1234 | BUG(); | |
1235 | } | |
1236 | nla_nest_end(skb, option_item); | |
1237 | } | |
1238 | ||
1239 | nla_nest_end(skb, option_list); | |
1240 | return genlmsg_end(skb, hdr); | |
1241 | ||
1242 | nla_put_failure: | |
1243 | genlmsg_cancel(skb, hdr); | |
1244 | return -EMSGSIZE; | |
1245 | } | |
1246 | ||
1247 | static int team_nl_fill_options_get(struct sk_buff *skb, | |
1248 | struct genl_info *info, int flags, | |
1249 | struct team *team) | |
1250 | { | |
1251 | return team_nl_fill_options_get_changed(skb, info->snd_pid, | |
1252 | info->snd_seq, NLM_F_ACK, | |
1253 | team, NULL); | |
1254 | } | |
1255 | ||
1256 | static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) | |
1257 | { | |
1258 | struct team *team; | |
1259 | int err; | |
1260 | ||
1261 | team = team_nl_team_get(info); | |
1262 | if (!team) | |
1263 | return -EINVAL; | |
1264 | ||
1265 | err = team_nl_send_generic(info, team, team_nl_fill_options_get); | |
1266 | ||
1267 | team_nl_team_put(team); | |
1268 | ||
1269 | return err; | |
1270 | } | |
1271 | ||
1272 | static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) | |
1273 | { | |
1274 | struct team *team; | |
1275 | int err = 0; | |
1276 | int i; | |
1277 | struct nlattr *nl_option; | |
1278 | ||
1279 | team = team_nl_team_get(info); | |
1280 | if (!team) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | err = -EINVAL; | |
1284 | if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { | |
1285 | err = -EINVAL; | |
1286 | goto team_put; | |
1287 | } | |
1288 | ||
1289 | nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { | |
1290 | struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1]; | |
1291 | enum team_option_type opt_type; | |
1292 | struct team_option *option; | |
1293 | char *opt_name; | |
1294 | bool opt_found = false; | |
1295 | ||
1296 | if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { | |
1297 | err = -EINVAL; | |
1298 | goto team_put; | |
1299 | } | |
1300 | err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX, | |
1301 | nl_option, team_nl_option_policy); | |
1302 | if (err) | |
1303 | goto team_put; | |
1304 | if (!mode_attrs[TEAM_ATTR_OPTION_NAME] || | |
1305 | !mode_attrs[TEAM_ATTR_OPTION_TYPE] || | |
1306 | !mode_attrs[TEAM_ATTR_OPTION_DATA]) { | |
1307 | err = -EINVAL; | |
1308 | goto team_put; | |
1309 | } | |
1310 | switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) { | |
1311 | case NLA_U32: | |
1312 | opt_type = TEAM_OPTION_TYPE_U32; | |
1313 | break; | |
1314 | case NLA_STRING: | |
1315 | opt_type = TEAM_OPTION_TYPE_STRING; | |
1316 | break; | |
1317 | default: | |
1318 | goto team_put; | |
1319 | } | |
1320 | ||
1321 | opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]); | |
1322 | list_for_each_entry(option, &team->option_list, list) { | |
1323 | long arg; | |
1324 | struct nlattr *opt_data_attr; | |
1325 | ||
1326 | if (option->type != opt_type || | |
1327 | strcmp(option->name, opt_name)) | |
1328 | continue; | |
1329 | opt_found = true; | |
1330 | opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA]; | |
1331 | switch (opt_type) { | |
1332 | case TEAM_OPTION_TYPE_U32: | |
1333 | arg = nla_get_u32(opt_data_attr); | |
1334 | break; | |
1335 | case TEAM_OPTION_TYPE_STRING: | |
1336 | arg = (long) nla_data(opt_data_attr); | |
1337 | break; | |
1338 | default: | |
1339 | BUG(); | |
1340 | } | |
1341 | err = team_option_set(team, option, &arg); | |
1342 | if (err) | |
1343 | goto team_put; | |
1344 | } | |
1345 | if (!opt_found) { | |
1346 | err = -ENOENT; | |
1347 | goto team_put; | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | team_put: | |
1352 | team_nl_team_put(team); | |
1353 | ||
1354 | return err; | |
1355 | } | |
1356 | ||
1357 | static int team_nl_fill_port_list_get_changed(struct sk_buff *skb, | |
1358 | u32 pid, u32 seq, int flags, | |
1359 | struct team *team, | |
1360 | struct team_port *changed_port) | |
1361 | { | |
1362 | struct nlattr *port_list; | |
1363 | void *hdr; | |
1364 | struct team_port *port; | |
1365 | ||
1366 | hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, | |
1367 | TEAM_CMD_PORT_LIST_GET); | |
1368 | if (IS_ERR(hdr)) | |
1369 | return PTR_ERR(hdr); | |
1370 | ||
1371 | NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex); | |
1372 | port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); | |
1373 | if (!port_list) | |
1374 | return -EMSGSIZE; | |
1375 | ||
1376 | list_for_each_entry(port, &team->port_list, list) { | |
1377 | struct nlattr *port_item; | |
1378 | ||
1379 | port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); | |
1380 | if (!port_item) | |
1381 | goto nla_put_failure; | |
1382 | NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex); | |
1383 | if (port == changed_port) | |
1384 | NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED); | |
1385 | if (port->linkup) | |
1386 | NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP); | |
1387 | NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed); | |
1388 | NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex); | |
1389 | nla_nest_end(skb, port_item); | |
1390 | } | |
1391 | ||
1392 | nla_nest_end(skb, port_list); | |
1393 | return genlmsg_end(skb, hdr); | |
1394 | ||
1395 | nla_put_failure: | |
1396 | genlmsg_cancel(skb, hdr); | |
1397 | return -EMSGSIZE; | |
1398 | } | |
1399 | ||
1400 | static int team_nl_fill_port_list_get(struct sk_buff *skb, | |
1401 | struct genl_info *info, int flags, | |
1402 | struct team *team) | |
1403 | { | |
1404 | return team_nl_fill_port_list_get_changed(skb, info->snd_pid, | |
1405 | info->snd_seq, NLM_F_ACK, | |
1406 | team, NULL); | |
1407 | } | |
1408 | ||
1409 | static int team_nl_cmd_port_list_get(struct sk_buff *skb, | |
1410 | struct genl_info *info) | |
1411 | { | |
1412 | struct team *team; | |
1413 | int err; | |
1414 | ||
1415 | team = team_nl_team_get(info); | |
1416 | if (!team) | |
1417 | return -EINVAL; | |
1418 | ||
1419 | err = team_nl_send_generic(info, team, team_nl_fill_port_list_get); | |
1420 | ||
1421 | team_nl_team_put(team); | |
1422 | ||
1423 | return err; | |
1424 | } | |
1425 | ||
1426 | static struct genl_ops team_nl_ops[] = { | |
1427 | { | |
1428 | .cmd = TEAM_CMD_NOOP, | |
1429 | .doit = team_nl_cmd_noop, | |
1430 | .policy = team_nl_policy, | |
1431 | }, | |
1432 | { | |
1433 | .cmd = TEAM_CMD_OPTIONS_SET, | |
1434 | .doit = team_nl_cmd_options_set, | |
1435 | .policy = team_nl_policy, | |
1436 | .flags = GENL_ADMIN_PERM, | |
1437 | }, | |
1438 | { | |
1439 | .cmd = TEAM_CMD_OPTIONS_GET, | |
1440 | .doit = team_nl_cmd_options_get, | |
1441 | .policy = team_nl_policy, | |
1442 | .flags = GENL_ADMIN_PERM, | |
1443 | }, | |
1444 | { | |
1445 | .cmd = TEAM_CMD_PORT_LIST_GET, | |
1446 | .doit = team_nl_cmd_port_list_get, | |
1447 | .policy = team_nl_policy, | |
1448 | .flags = GENL_ADMIN_PERM, | |
1449 | }, | |
1450 | }; | |
1451 | ||
1452 | static struct genl_multicast_group team_change_event_mcgrp = { | |
1453 | .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, | |
1454 | }; | |
1455 | ||
1456 | static int team_nl_send_event_options_get(struct team *team, | |
1457 | struct team_option *changed_option) | |
1458 | { | |
1459 | struct sk_buff *skb; | |
1460 | int err; | |
1461 | struct net *net = dev_net(team->dev); | |
1462 | ||
1463 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1464 | if (!skb) | |
1465 | return -ENOMEM; | |
1466 | ||
1467 | err = team_nl_fill_options_get_changed(skb, 0, 0, 0, team, | |
1468 | changed_option); | |
1469 | if (err < 0) | |
1470 | goto err_fill; | |
1471 | ||
1472 | err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, | |
1473 | GFP_KERNEL); | |
1474 | return err; | |
1475 | ||
1476 | err_fill: | |
1477 | nlmsg_free(skb); | |
1478 | return err; | |
1479 | } | |
1480 | ||
1481 | static int team_nl_send_event_port_list_get(struct team_port *port) | |
1482 | { | |
1483 | struct sk_buff *skb; | |
1484 | int err; | |
1485 | struct net *net = dev_net(port->team->dev); | |
1486 | ||
1487 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1488 | if (!skb) | |
1489 | return -ENOMEM; | |
1490 | ||
1491 | err = team_nl_fill_port_list_get_changed(skb, 0, 0, 0, | |
1492 | port->team, port); | |
1493 | if (err < 0) | |
1494 | goto err_fill; | |
1495 | ||
1496 | err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, | |
1497 | GFP_KERNEL); | |
1498 | return err; | |
1499 | ||
1500 | err_fill: | |
1501 | nlmsg_free(skb); | |
1502 | return err; | |
1503 | } | |
1504 | ||
1505 | static int team_nl_init(void) | |
1506 | { | |
1507 | int err; | |
1508 | ||
1509 | err = genl_register_family_with_ops(&team_nl_family, team_nl_ops, | |
1510 | ARRAY_SIZE(team_nl_ops)); | |
1511 | if (err) | |
1512 | return err; | |
1513 | ||
1514 | err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp); | |
1515 | if (err) | |
1516 | goto err_change_event_grp_reg; | |
1517 | ||
1518 | return 0; | |
1519 | ||
1520 | err_change_event_grp_reg: | |
1521 | genl_unregister_family(&team_nl_family); | |
1522 | ||
1523 | return err; | |
1524 | } | |
1525 | ||
1526 | static void team_nl_fini(void) | |
1527 | { | |
1528 | genl_unregister_family(&team_nl_family); | |
1529 | } | |
1530 | ||
1531 | ||
1532 | /****************** | |
1533 | * Change checkers | |
1534 | ******************/ | |
1535 | ||
1536 | static void __team_options_change_check(struct team *team, | |
1537 | struct team_option *changed_option) | |
1538 | { | |
1539 | int err; | |
1540 | ||
1541 | err = team_nl_send_event_options_get(team, changed_option); | |
1542 | if (err) | |
1543 | netdev_warn(team->dev, "Failed to send options change via netlink\n"); | |
1544 | } | |
1545 | ||
1546 | /* rtnl lock is held */ | |
1547 | static void __team_port_change_check(struct team_port *port, bool linkup) | |
1548 | { | |
1549 | int err; | |
1550 | ||
1551 | if (port->linkup == linkup) | |
1552 | return; | |
1553 | ||
1554 | port->linkup = linkup; | |
1555 | if (linkup) { | |
1556 | struct ethtool_cmd ecmd; | |
1557 | ||
1558 | err = __ethtool_get_settings(port->dev, &ecmd); | |
1559 | if (!err) { | |
1560 | port->speed = ethtool_cmd_speed(&ecmd); | |
1561 | port->duplex = ecmd.duplex; | |
1562 | goto send_event; | |
1563 | } | |
1564 | } | |
1565 | port->speed = 0; | |
1566 | port->duplex = 0; | |
1567 | ||
1568 | send_event: | |
1569 | err = team_nl_send_event_port_list_get(port); | |
1570 | if (err) | |
1571 | netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n", | |
1572 | port->dev->name); | |
1573 | ||
1574 | } | |
1575 | ||
1576 | static void team_port_change_check(struct team_port *port, bool linkup) | |
1577 | { | |
1578 | struct team *team = port->team; | |
1579 | ||
61dc3461 | 1580 | mutex_lock(&team->lock); |
3d249d4c | 1581 | __team_port_change_check(port, linkup); |
61dc3461 | 1582 | mutex_unlock(&team->lock); |
3d249d4c JP |
1583 | } |
1584 | ||
1585 | /************************************ | |
1586 | * Net device notifier event handler | |
1587 | ************************************/ | |
1588 | ||
1589 | static int team_device_event(struct notifier_block *unused, | |
1590 | unsigned long event, void *ptr) | |
1591 | { | |
1592 | struct net_device *dev = (struct net_device *) ptr; | |
1593 | struct team_port *port; | |
1594 | ||
1595 | port = team_port_get_rtnl(dev); | |
1596 | if (!port) | |
1597 | return NOTIFY_DONE; | |
1598 | ||
1599 | switch (event) { | |
1600 | case NETDEV_UP: | |
1601 | if (netif_carrier_ok(dev)) | |
1602 | team_port_change_check(port, true); | |
1603 | case NETDEV_DOWN: | |
1604 | team_port_change_check(port, false); | |
1605 | case NETDEV_CHANGE: | |
1606 | if (netif_running(port->dev)) | |
1607 | team_port_change_check(port, | |
1608 | !!netif_carrier_ok(port->dev)); | |
1609 | break; | |
1610 | case NETDEV_UNREGISTER: | |
1611 | team_del_slave(port->team->dev, dev); | |
1612 | break; | |
1613 | case NETDEV_FEAT_CHANGE: | |
1614 | team_compute_features(port->team); | |
1615 | break; | |
1616 | case NETDEV_CHANGEMTU: | |
1617 | /* Forbid to change mtu of underlaying device */ | |
1618 | return NOTIFY_BAD; | |
1619 | case NETDEV_PRE_TYPE_CHANGE: | |
1620 | /* Forbid to change type of underlaying device */ | |
1621 | return NOTIFY_BAD; | |
1622 | } | |
1623 | return NOTIFY_DONE; | |
1624 | } | |
1625 | ||
1626 | static struct notifier_block team_notifier_block __read_mostly = { | |
1627 | .notifier_call = team_device_event, | |
1628 | }; | |
1629 | ||
1630 | ||
1631 | /*********************** | |
1632 | * Module init and exit | |
1633 | ***********************/ | |
1634 | ||
1635 | static int __init team_module_init(void) | |
1636 | { | |
1637 | int err; | |
1638 | ||
1639 | register_netdevice_notifier(&team_notifier_block); | |
1640 | ||
1641 | err = rtnl_link_register(&team_link_ops); | |
1642 | if (err) | |
1643 | goto err_rtnl_reg; | |
1644 | ||
1645 | err = team_nl_init(); | |
1646 | if (err) | |
1647 | goto err_nl_init; | |
1648 | ||
1649 | return 0; | |
1650 | ||
1651 | err_nl_init: | |
1652 | rtnl_link_unregister(&team_link_ops); | |
1653 | ||
1654 | err_rtnl_reg: | |
1655 | unregister_netdevice_notifier(&team_notifier_block); | |
1656 | ||
1657 | return err; | |
1658 | } | |
1659 | ||
1660 | static void __exit team_module_exit(void) | |
1661 | { | |
1662 | team_nl_fini(); | |
1663 | rtnl_link_unregister(&team_link_ops); | |
1664 | unregister_netdevice_notifier(&team_notifier_block); | |
1665 | } | |
1666 | ||
1667 | module_init(team_module_init); | |
1668 | module_exit(team_module_exit); | |
1669 | ||
1670 | MODULE_LICENSE("GPL v2"); | |
1671 | MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); | |
1672 | MODULE_DESCRIPTION("Ethernet team device driver"); | |
1673 | MODULE_ALIAS_RTNL_LINK(DRV_NAME); |