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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 | ||
b82b9183 JP |
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 | ||
b82b9183 JP |
119 | for (i = 0; i < option_count; i++) { |
120 | dst_opts[i]->changed = true; | |
121 | dst_opts[i]->removed = false; | |
358b8382 | 122 | list_add_tail(&dst_opts[i]->list, &team->option_list); |
b82b9183 | 123 | } |
358b8382 | 124 | |
2bba19ff | 125 | kfree(dst_opts); |
358b8382 JP |
126 | return 0; |
127 | ||
128 | rollback: | |
129 | for (i = 0; i < option_count; i++) | |
130 | kfree(dst_opts[i]); | |
131 | ||
2bba19ff | 132 | kfree(dst_opts); |
358b8382 | 133 | return err; |
3d249d4c | 134 | } |
358b8382 | 135 | |
b82b9183 JP |
136 | static void __team_options_mark_removed(struct team *team, |
137 | const struct team_option *option, | |
138 | size_t option_count) | |
139 | { | |
140 | int i; | |
141 | ||
142 | for (i = 0; i < option_count; i++, option++) { | |
143 | struct team_option *del_opt; | |
3d249d4c | 144 | |
b82b9183 JP |
145 | del_opt = __team_find_option(team, option->name); |
146 | if (del_opt) { | |
147 | del_opt->changed = true; | |
148 | del_opt->removed = true; | |
149 | } | |
150 | } | |
151 | } | |
3d249d4c JP |
152 | |
153 | static void __team_options_unregister(struct team *team, | |
358b8382 | 154 | const struct team_option *option, |
3d249d4c JP |
155 | size_t option_count) |
156 | { | |
157 | int i; | |
158 | ||
358b8382 JP |
159 | for (i = 0; i < option_count; i++, option++) { |
160 | struct team_option *del_opt; | |
161 | ||
162 | del_opt = __team_find_option(team, option->name); | |
163 | if (del_opt) { | |
164 | list_del(&del_opt->list); | |
165 | kfree(del_opt); | |
166 | } | |
167 | } | |
3d249d4c JP |
168 | } |
169 | ||
b82b9183 JP |
170 | static void __team_options_change_check(struct team *team); |
171 | ||
172 | int team_options_register(struct team *team, | |
173 | const struct team_option *option, | |
174 | size_t option_count) | |
175 | { | |
176 | int err; | |
177 | ||
178 | err = __team_options_register(team, option, option_count); | |
179 | if (err) | |
180 | return err; | |
181 | __team_options_change_check(team); | |
182 | return 0; | |
183 | } | |
184 | EXPORT_SYMBOL(team_options_register); | |
185 | ||
358b8382 JP |
186 | void team_options_unregister(struct team *team, |
187 | const struct team_option *option, | |
3d249d4c JP |
188 | size_t option_count) |
189 | { | |
b82b9183 JP |
190 | __team_options_mark_removed(team, option, option_count); |
191 | __team_options_change_check(team); | |
3d249d4c | 192 | __team_options_unregister(team, option, option_count); |
3d249d4c JP |
193 | } |
194 | EXPORT_SYMBOL(team_options_unregister); | |
195 | ||
196 | static int team_option_get(struct team *team, struct team_option *option, | |
197 | void *arg) | |
198 | { | |
199 | return option->getter(team, arg); | |
200 | } | |
201 | ||
202 | static int team_option_set(struct team *team, struct team_option *option, | |
203 | void *arg) | |
204 | { | |
205 | int err; | |
206 | ||
207 | err = option->setter(team, arg); | |
208 | if (err) | |
209 | return err; | |
210 | ||
b82b9183 JP |
211 | option->changed = true; |
212 | __team_options_change_check(team); | |
3d249d4c JP |
213 | return err; |
214 | } | |
215 | ||
216 | /**************** | |
217 | * Mode handling | |
218 | ****************/ | |
219 | ||
220 | static LIST_HEAD(mode_list); | |
221 | static DEFINE_SPINLOCK(mode_list_lock); | |
222 | ||
223 | static struct team_mode *__find_mode(const char *kind) | |
224 | { | |
225 | struct team_mode *mode; | |
226 | ||
227 | list_for_each_entry(mode, &mode_list, list) { | |
228 | if (strcmp(mode->kind, kind) == 0) | |
229 | return mode; | |
230 | } | |
231 | return NULL; | |
232 | } | |
233 | ||
234 | static bool is_good_mode_name(const char *name) | |
235 | { | |
236 | while (*name != '\0') { | |
237 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
238 | return false; | |
239 | name++; | |
240 | } | |
241 | return true; | |
242 | } | |
243 | ||
244 | int team_mode_register(struct team_mode *mode) | |
245 | { | |
246 | int err = 0; | |
247 | ||
248 | if (!is_good_mode_name(mode->kind) || | |
249 | mode->priv_size > TEAM_MODE_PRIV_SIZE) | |
250 | return -EINVAL; | |
251 | spin_lock(&mode_list_lock); | |
252 | if (__find_mode(mode->kind)) { | |
253 | err = -EEXIST; | |
254 | goto unlock; | |
255 | } | |
256 | list_add_tail(&mode->list, &mode_list); | |
257 | unlock: | |
258 | spin_unlock(&mode_list_lock); | |
259 | return err; | |
260 | } | |
261 | EXPORT_SYMBOL(team_mode_register); | |
262 | ||
263 | int team_mode_unregister(struct team_mode *mode) | |
264 | { | |
265 | spin_lock(&mode_list_lock); | |
266 | list_del_init(&mode->list); | |
267 | spin_unlock(&mode_list_lock); | |
268 | return 0; | |
269 | } | |
270 | EXPORT_SYMBOL(team_mode_unregister); | |
271 | ||
272 | static struct team_mode *team_mode_get(const char *kind) | |
273 | { | |
274 | struct team_mode *mode; | |
275 | ||
276 | spin_lock(&mode_list_lock); | |
277 | mode = __find_mode(kind); | |
278 | if (!mode) { | |
279 | spin_unlock(&mode_list_lock); | |
280 | request_module("team-mode-%s", kind); | |
281 | spin_lock(&mode_list_lock); | |
282 | mode = __find_mode(kind); | |
283 | } | |
284 | if (mode) | |
285 | if (!try_module_get(mode->owner)) | |
286 | mode = NULL; | |
287 | ||
288 | spin_unlock(&mode_list_lock); | |
289 | return mode; | |
290 | } | |
291 | ||
292 | static void team_mode_put(const struct team_mode *mode) | |
293 | { | |
294 | module_put(mode->owner); | |
295 | } | |
296 | ||
297 | static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) | |
298 | { | |
299 | dev_kfree_skb_any(skb); | |
300 | return false; | |
301 | } | |
302 | ||
303 | rx_handler_result_t team_dummy_receive(struct team *team, | |
304 | struct team_port *port, | |
305 | struct sk_buff *skb) | |
306 | { | |
307 | return RX_HANDLER_ANOTHER; | |
308 | } | |
309 | ||
310 | static void team_adjust_ops(struct team *team) | |
311 | { | |
312 | /* | |
313 | * To avoid checks in rx/tx skb paths, ensure here that non-null and | |
314 | * correct ops are always set. | |
315 | */ | |
316 | ||
317 | if (list_empty(&team->port_list) || | |
318 | !team->mode || !team->mode->ops->transmit) | |
319 | team->ops.transmit = team_dummy_transmit; | |
320 | else | |
321 | team->ops.transmit = team->mode->ops->transmit; | |
322 | ||
323 | if (list_empty(&team->port_list) || | |
324 | !team->mode || !team->mode->ops->receive) | |
325 | team->ops.receive = team_dummy_receive; | |
326 | else | |
327 | team->ops.receive = team->mode->ops->receive; | |
328 | } | |
329 | ||
330 | /* | |
331 | * We can benefit from the fact that it's ensured no port is present | |
332 | * at the time of mode change. Therefore no packets are in fly so there's no | |
333 | * need to set mode operations in any special way. | |
334 | */ | |
335 | static int __team_change_mode(struct team *team, | |
336 | const struct team_mode *new_mode) | |
337 | { | |
338 | /* Check if mode was previously set and do cleanup if so */ | |
339 | if (team->mode) { | |
340 | void (*exit_op)(struct team *team) = team->ops.exit; | |
341 | ||
342 | /* Clear ops area so no callback is called any longer */ | |
343 | memset(&team->ops, 0, sizeof(struct team_mode_ops)); | |
344 | team_adjust_ops(team); | |
345 | ||
346 | if (exit_op) | |
347 | exit_op(team); | |
348 | team_mode_put(team->mode); | |
349 | team->mode = NULL; | |
350 | /* zero private data area */ | |
351 | memset(&team->mode_priv, 0, | |
352 | sizeof(struct team) - offsetof(struct team, mode_priv)); | |
353 | } | |
354 | ||
355 | if (!new_mode) | |
356 | return 0; | |
357 | ||
358 | if (new_mode->ops->init) { | |
359 | int err; | |
360 | ||
361 | err = new_mode->ops->init(team); | |
362 | if (err) | |
363 | return err; | |
364 | } | |
365 | ||
366 | team->mode = new_mode; | |
367 | memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); | |
368 | team_adjust_ops(team); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static int team_change_mode(struct team *team, const char *kind) | |
374 | { | |
375 | struct team_mode *new_mode; | |
376 | struct net_device *dev = team->dev; | |
377 | int err; | |
378 | ||
379 | if (!list_empty(&team->port_list)) { | |
380 | netdev_err(dev, "No ports can be present during mode change\n"); | |
381 | return -EBUSY; | |
382 | } | |
383 | ||
384 | if (team->mode && strcmp(team->mode->kind, kind) == 0) { | |
385 | netdev_err(dev, "Unable to change to the same mode the team is in\n"); | |
386 | return -EINVAL; | |
387 | } | |
388 | ||
389 | new_mode = team_mode_get(kind); | |
390 | if (!new_mode) { | |
391 | netdev_err(dev, "Mode \"%s\" not found\n", kind); | |
392 | return -EINVAL; | |
393 | } | |
394 | ||
395 | err = __team_change_mode(team, new_mode); | |
396 | if (err) { | |
397 | netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); | |
398 | team_mode_put(new_mode); | |
399 | return err; | |
400 | } | |
401 | ||
402 | netdev_info(dev, "Mode changed to \"%s\"\n", kind); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | ||
407 | /************************ | |
408 | * Rx path frame handler | |
409 | ************************/ | |
410 | ||
411 | /* note: already called with rcu_read_lock */ | |
412 | static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) | |
413 | { | |
414 | struct sk_buff *skb = *pskb; | |
415 | struct team_port *port; | |
416 | struct team *team; | |
417 | rx_handler_result_t res; | |
418 | ||
419 | skb = skb_share_check(skb, GFP_ATOMIC); | |
420 | if (!skb) | |
421 | return RX_HANDLER_CONSUMED; | |
422 | ||
423 | *pskb = skb; | |
424 | ||
425 | port = team_port_get_rcu(skb->dev); | |
426 | team = port->team; | |
427 | ||
428 | res = team->ops.receive(team, port, skb); | |
429 | if (res == RX_HANDLER_ANOTHER) { | |
430 | struct team_pcpu_stats *pcpu_stats; | |
431 | ||
432 | pcpu_stats = this_cpu_ptr(team->pcpu_stats); | |
433 | u64_stats_update_begin(&pcpu_stats->syncp); | |
434 | pcpu_stats->rx_packets++; | |
435 | pcpu_stats->rx_bytes += skb->len; | |
436 | if (skb->pkt_type == PACKET_MULTICAST) | |
437 | pcpu_stats->rx_multicast++; | |
438 | u64_stats_update_end(&pcpu_stats->syncp); | |
439 | ||
440 | skb->dev = team->dev; | |
441 | } else { | |
442 | this_cpu_inc(team->pcpu_stats->rx_dropped); | |
443 | } | |
444 | ||
445 | return res; | |
446 | } | |
447 | ||
448 | ||
449 | /**************** | |
450 | * Port handling | |
451 | ****************/ | |
452 | ||
453 | static bool team_port_find(const struct team *team, | |
454 | const struct team_port *port) | |
455 | { | |
456 | struct team_port *cur; | |
457 | ||
458 | list_for_each_entry(cur, &team->port_list, list) | |
459 | if (cur == port) | |
460 | return true; | |
461 | return false; | |
462 | } | |
463 | ||
464 | /* | |
465 | * Add/delete port to the team port list. Write guarded by rtnl_lock. | |
466 | * Takes care of correct port->index setup (might be racy). | |
467 | */ | |
468 | static void team_port_list_add_port(struct team *team, | |
469 | struct team_port *port) | |
470 | { | |
471 | port->index = team->port_count++; | |
472 | hlist_add_head_rcu(&port->hlist, | |
473 | team_port_index_hash(team, port->index)); | |
474 | list_add_tail_rcu(&port->list, &team->port_list); | |
475 | } | |
476 | ||
477 | static void __reconstruct_port_hlist(struct team *team, int rm_index) | |
478 | { | |
479 | int i; | |
480 | struct team_port *port; | |
481 | ||
482 | for (i = rm_index + 1; i < team->port_count; i++) { | |
483 | port = team_get_port_by_index(team, i); | |
484 | hlist_del_rcu(&port->hlist); | |
485 | port->index--; | |
486 | hlist_add_head_rcu(&port->hlist, | |
487 | team_port_index_hash(team, port->index)); | |
488 | } | |
489 | } | |
490 | ||
491 | static void team_port_list_del_port(struct team *team, | |
492 | struct team_port *port) | |
493 | { | |
494 | int rm_index = port->index; | |
495 | ||
496 | hlist_del_rcu(&port->hlist); | |
497 | list_del_rcu(&port->list); | |
498 | __reconstruct_port_hlist(team, rm_index); | |
499 | team->port_count--; | |
500 | } | |
501 | ||
502 | #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ | |
503 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
504 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
505 | ||
506 | static void __team_compute_features(struct team *team) | |
507 | { | |
508 | struct team_port *port; | |
509 | u32 vlan_features = TEAM_VLAN_FEATURES; | |
510 | unsigned short max_hard_header_len = ETH_HLEN; | |
511 | ||
512 | list_for_each_entry(port, &team->port_list, list) { | |
513 | vlan_features = netdev_increment_features(vlan_features, | |
514 | port->dev->vlan_features, | |
515 | TEAM_VLAN_FEATURES); | |
516 | ||
517 | if (port->dev->hard_header_len > max_hard_header_len) | |
518 | max_hard_header_len = port->dev->hard_header_len; | |
519 | } | |
520 | ||
521 | team->dev->vlan_features = vlan_features; | |
522 | team->dev->hard_header_len = max_hard_header_len; | |
523 | ||
524 | netdev_change_features(team->dev); | |
525 | } | |
526 | ||
527 | static void team_compute_features(struct team *team) | |
528 | { | |
61dc3461 | 529 | mutex_lock(&team->lock); |
3d249d4c | 530 | __team_compute_features(team); |
61dc3461 | 531 | mutex_unlock(&team->lock); |
3d249d4c JP |
532 | } |
533 | ||
534 | static int team_port_enter(struct team *team, struct team_port *port) | |
535 | { | |
536 | int err = 0; | |
537 | ||
538 | dev_hold(team->dev); | |
539 | port->dev->priv_flags |= IFF_TEAM_PORT; | |
540 | if (team->ops.port_enter) { | |
541 | err = team->ops.port_enter(team, port); | |
542 | if (err) { | |
543 | netdev_err(team->dev, "Device %s failed to enter team mode\n", | |
544 | port->dev->name); | |
545 | goto err_port_enter; | |
546 | } | |
547 | } | |
548 | ||
549 | return 0; | |
550 | ||
551 | err_port_enter: | |
552 | port->dev->priv_flags &= ~IFF_TEAM_PORT; | |
553 | dev_put(team->dev); | |
554 | ||
555 | return err; | |
556 | } | |
557 | ||
558 | static void team_port_leave(struct team *team, struct team_port *port) | |
559 | { | |
560 | if (team->ops.port_leave) | |
561 | team->ops.port_leave(team, port); | |
562 | port->dev->priv_flags &= ~IFF_TEAM_PORT; | |
563 | dev_put(team->dev); | |
564 | } | |
565 | ||
566 | static void __team_port_change_check(struct team_port *port, bool linkup); | |
567 | ||
568 | static int team_port_add(struct team *team, struct net_device *port_dev) | |
569 | { | |
570 | struct net_device *dev = team->dev; | |
571 | struct team_port *port; | |
572 | char *portname = port_dev->name; | |
573 | int err; | |
574 | ||
575 | if (port_dev->flags & IFF_LOOPBACK || | |
576 | port_dev->type != ARPHRD_ETHER) { | |
577 | netdev_err(dev, "Device %s is of an unsupported type\n", | |
578 | portname); | |
579 | return -EINVAL; | |
580 | } | |
581 | ||
582 | if (team_port_exists(port_dev)) { | |
583 | netdev_err(dev, "Device %s is already a port " | |
584 | "of a team device\n", portname); | |
585 | return -EBUSY; | |
586 | } | |
587 | ||
588 | if (port_dev->flags & IFF_UP) { | |
589 | netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", | |
590 | portname); | |
591 | return -EBUSY; | |
592 | } | |
593 | ||
594 | port = kzalloc(sizeof(struct team_port), GFP_KERNEL); | |
595 | if (!port) | |
596 | return -ENOMEM; | |
597 | ||
598 | port->dev = port_dev; | |
599 | port->team = team; | |
600 | ||
601 | port->orig.mtu = port_dev->mtu; | |
602 | err = dev_set_mtu(port_dev, dev->mtu); | |
603 | if (err) { | |
604 | netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); | |
605 | goto err_set_mtu; | |
606 | } | |
607 | ||
608 | memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN); | |
609 | ||
610 | err = team_port_enter(team, port); | |
611 | if (err) { | |
612 | netdev_err(dev, "Device %s failed to enter team mode\n", | |
613 | portname); | |
614 | goto err_port_enter; | |
615 | } | |
616 | ||
617 | err = dev_open(port_dev); | |
618 | if (err) { | |
619 | netdev_dbg(dev, "Device %s opening failed\n", | |
620 | portname); | |
621 | goto err_dev_open; | |
622 | } | |
623 | ||
57459185 JP |
624 | err = vlan_vids_add_by_dev(port_dev, dev); |
625 | if (err) { | |
626 | netdev_err(dev, "Failed to add vlan ids to device %s\n", | |
627 | portname); | |
628 | goto err_vids_add; | |
629 | } | |
630 | ||
3d249d4c JP |
631 | err = netdev_set_master(port_dev, dev); |
632 | if (err) { | |
633 | netdev_err(dev, "Device %s failed to set master\n", portname); | |
634 | goto err_set_master; | |
635 | } | |
636 | ||
637 | err = netdev_rx_handler_register(port_dev, team_handle_frame, | |
638 | port); | |
639 | if (err) { | |
640 | netdev_err(dev, "Device %s failed to register rx_handler\n", | |
641 | portname); | |
642 | goto err_handler_register; | |
643 | } | |
644 | ||
645 | team_port_list_add_port(team, port); | |
646 | team_adjust_ops(team); | |
647 | __team_compute_features(team); | |
648 | __team_port_change_check(port, !!netif_carrier_ok(port_dev)); | |
649 | ||
650 | netdev_info(dev, "Port device %s added\n", portname); | |
651 | ||
652 | return 0; | |
653 | ||
654 | err_handler_register: | |
655 | netdev_set_master(port_dev, NULL); | |
656 | ||
657 | err_set_master: | |
57459185 JP |
658 | vlan_vids_del_by_dev(port_dev, dev); |
659 | ||
660 | err_vids_add: | |
3d249d4c JP |
661 | dev_close(port_dev); |
662 | ||
663 | err_dev_open: | |
664 | team_port_leave(team, port); | |
665 | team_port_set_orig_mac(port); | |
666 | ||
667 | err_port_enter: | |
668 | dev_set_mtu(port_dev, port->orig.mtu); | |
669 | ||
670 | err_set_mtu: | |
671 | kfree(port); | |
672 | ||
673 | return err; | |
674 | } | |
675 | ||
676 | static int team_port_del(struct team *team, struct net_device *port_dev) | |
677 | { | |
678 | struct net_device *dev = team->dev; | |
679 | struct team_port *port; | |
680 | char *portname = port_dev->name; | |
681 | ||
682 | port = team_port_get_rtnl(port_dev); | |
683 | if (!port || !team_port_find(team, port)) { | |
684 | netdev_err(dev, "Device %s does not act as a port of this team\n", | |
685 | portname); | |
686 | return -ENOENT; | |
687 | } | |
688 | ||
b82b9183 | 689 | port->removed = true; |
3d249d4c JP |
690 | __team_port_change_check(port, false); |
691 | team_port_list_del_port(team, port); | |
692 | team_adjust_ops(team); | |
693 | netdev_rx_handler_unregister(port_dev); | |
694 | netdev_set_master(port_dev, NULL); | |
57459185 | 695 | vlan_vids_del_by_dev(port_dev, dev); |
3d249d4c JP |
696 | dev_close(port_dev); |
697 | team_port_leave(team, port); | |
698 | team_port_set_orig_mac(port); | |
699 | dev_set_mtu(port_dev, port->orig.mtu); | |
700 | synchronize_rcu(); | |
701 | kfree(port); | |
702 | netdev_info(dev, "Port device %s removed\n", portname); | |
703 | __team_compute_features(team); | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | ||
709 | /***************** | |
710 | * Net device ops | |
711 | *****************/ | |
712 | ||
713 | static const char team_no_mode_kind[] = "*NOMODE*"; | |
714 | ||
715 | static int team_mode_option_get(struct team *team, void *arg) | |
716 | { | |
717 | const char **str = arg; | |
718 | ||
719 | *str = team->mode ? team->mode->kind : team_no_mode_kind; | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static int team_mode_option_set(struct team *team, void *arg) | |
724 | { | |
725 | const char **str = arg; | |
726 | ||
727 | return team_change_mode(team, *str); | |
728 | } | |
729 | ||
358b8382 | 730 | static const struct team_option team_options[] = { |
3d249d4c JP |
731 | { |
732 | .name = "mode", | |
733 | .type = TEAM_OPTION_TYPE_STRING, | |
734 | .getter = team_mode_option_get, | |
735 | .setter = team_mode_option_set, | |
736 | }, | |
737 | }; | |
738 | ||
739 | static int team_init(struct net_device *dev) | |
740 | { | |
741 | struct team *team = netdev_priv(dev); | |
742 | int i; | |
358b8382 | 743 | int err; |
3d249d4c JP |
744 | |
745 | team->dev = dev; | |
61dc3461 | 746 | mutex_init(&team->lock); |
3d249d4c JP |
747 | |
748 | team->pcpu_stats = alloc_percpu(struct team_pcpu_stats); | |
749 | if (!team->pcpu_stats) | |
750 | return -ENOMEM; | |
751 | ||
752 | for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) | |
753 | INIT_HLIST_HEAD(&team->port_hlist[i]); | |
754 | INIT_LIST_HEAD(&team->port_list); | |
755 | ||
756 | team_adjust_ops(team); | |
757 | ||
758 | INIT_LIST_HEAD(&team->option_list); | |
358b8382 JP |
759 | err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); |
760 | if (err) | |
761 | goto err_options_register; | |
3d249d4c JP |
762 | netif_carrier_off(dev); |
763 | ||
764 | return 0; | |
358b8382 JP |
765 | |
766 | err_options_register: | |
767 | free_percpu(team->pcpu_stats); | |
768 | ||
769 | return err; | |
3d249d4c JP |
770 | } |
771 | ||
772 | static void team_uninit(struct net_device *dev) | |
773 | { | |
774 | struct team *team = netdev_priv(dev); | |
775 | struct team_port *port; | |
776 | struct team_port *tmp; | |
777 | ||
61dc3461 | 778 | mutex_lock(&team->lock); |
3d249d4c JP |
779 | list_for_each_entry_safe(port, tmp, &team->port_list, list) |
780 | team_port_del(team, port->dev); | |
781 | ||
782 | __team_change_mode(team, NULL); /* cleanup */ | |
783 | __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); | |
61dc3461 | 784 | mutex_unlock(&team->lock); |
3d249d4c JP |
785 | } |
786 | ||
787 | static void team_destructor(struct net_device *dev) | |
788 | { | |
789 | struct team *team = netdev_priv(dev); | |
790 | ||
791 | free_percpu(team->pcpu_stats); | |
792 | free_netdev(dev); | |
793 | } | |
794 | ||
795 | static int team_open(struct net_device *dev) | |
796 | { | |
797 | netif_carrier_on(dev); | |
798 | return 0; | |
799 | } | |
800 | ||
801 | static int team_close(struct net_device *dev) | |
802 | { | |
803 | netif_carrier_off(dev); | |
804 | return 0; | |
805 | } | |
806 | ||
807 | /* | |
808 | * note: already called with rcu_read_lock | |
809 | */ | |
810 | static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) | |
811 | { | |
812 | struct team *team = netdev_priv(dev); | |
813 | bool tx_success = false; | |
814 | unsigned int len = skb->len; | |
815 | ||
816 | tx_success = team->ops.transmit(team, skb); | |
817 | if (tx_success) { | |
818 | struct team_pcpu_stats *pcpu_stats; | |
819 | ||
820 | pcpu_stats = this_cpu_ptr(team->pcpu_stats); | |
821 | u64_stats_update_begin(&pcpu_stats->syncp); | |
822 | pcpu_stats->tx_packets++; | |
823 | pcpu_stats->tx_bytes += len; | |
824 | u64_stats_update_end(&pcpu_stats->syncp); | |
825 | } else { | |
826 | this_cpu_inc(team->pcpu_stats->tx_dropped); | |
827 | } | |
828 | ||
829 | return NETDEV_TX_OK; | |
830 | } | |
831 | ||
832 | static void team_change_rx_flags(struct net_device *dev, int change) | |
833 | { | |
834 | struct team *team = netdev_priv(dev); | |
835 | struct team_port *port; | |
836 | int inc; | |
837 | ||
838 | rcu_read_lock(); | |
839 | list_for_each_entry_rcu(port, &team->port_list, list) { | |
840 | if (change & IFF_PROMISC) { | |
841 | inc = dev->flags & IFF_PROMISC ? 1 : -1; | |
842 | dev_set_promiscuity(port->dev, inc); | |
843 | } | |
844 | if (change & IFF_ALLMULTI) { | |
845 | inc = dev->flags & IFF_ALLMULTI ? 1 : -1; | |
846 | dev_set_allmulti(port->dev, inc); | |
847 | } | |
848 | } | |
849 | rcu_read_unlock(); | |
850 | } | |
851 | ||
852 | static void team_set_rx_mode(struct net_device *dev) | |
853 | { | |
854 | struct team *team = netdev_priv(dev); | |
855 | struct team_port *port; | |
856 | ||
857 | rcu_read_lock(); | |
858 | list_for_each_entry_rcu(port, &team->port_list, list) { | |
859 | dev_uc_sync(port->dev, dev); | |
860 | dev_mc_sync(port->dev, dev); | |
861 | } | |
862 | rcu_read_unlock(); | |
863 | } | |
864 | ||
865 | static int team_set_mac_address(struct net_device *dev, void *p) | |
866 | { | |
867 | struct team *team = netdev_priv(dev); | |
868 | struct team_port *port; | |
869 | struct sockaddr *addr = p; | |
870 | ||
7ce5d222 | 871 | dev->addr_assign_type &= ~NET_ADDR_RANDOM; |
3d249d4c JP |
872 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
873 | rcu_read_lock(); | |
874 | list_for_each_entry_rcu(port, &team->port_list, list) | |
875 | if (team->ops.port_change_mac) | |
876 | team->ops.port_change_mac(team, port); | |
877 | rcu_read_unlock(); | |
878 | return 0; | |
879 | } | |
880 | ||
881 | static int team_change_mtu(struct net_device *dev, int new_mtu) | |
882 | { | |
883 | struct team *team = netdev_priv(dev); | |
884 | struct team_port *port; | |
885 | int err; | |
886 | ||
887 | /* | |
888 | * Alhough this is reader, it's guarded by team lock. It's not possible | |
889 | * to traverse list in reverse under rcu_read_lock | |
890 | */ | |
61dc3461 | 891 | mutex_lock(&team->lock); |
3d249d4c JP |
892 | list_for_each_entry(port, &team->port_list, list) { |
893 | err = dev_set_mtu(port->dev, new_mtu); | |
894 | if (err) { | |
895 | netdev_err(dev, "Device %s failed to change mtu", | |
896 | port->dev->name); | |
897 | goto unwind; | |
898 | } | |
899 | } | |
61dc3461 | 900 | mutex_unlock(&team->lock); |
3d249d4c JP |
901 | |
902 | dev->mtu = new_mtu; | |
903 | ||
904 | return 0; | |
905 | ||
906 | unwind: | |
907 | list_for_each_entry_continue_reverse(port, &team->port_list, list) | |
908 | dev_set_mtu(port->dev, dev->mtu); | |
61dc3461 | 909 | mutex_unlock(&team->lock); |
3d249d4c JP |
910 | |
911 | return err; | |
912 | } | |
913 | ||
914 | static struct rtnl_link_stats64 * | |
915 | team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) | |
916 | { | |
917 | struct team *team = netdev_priv(dev); | |
918 | struct team_pcpu_stats *p; | |
919 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
920 | u32 rx_dropped = 0, tx_dropped = 0; | |
921 | unsigned int start; | |
922 | int i; | |
923 | ||
924 | for_each_possible_cpu(i) { | |
925 | p = per_cpu_ptr(team->pcpu_stats, i); | |
926 | do { | |
927 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
928 | rx_packets = p->rx_packets; | |
929 | rx_bytes = p->rx_bytes; | |
930 | rx_multicast = p->rx_multicast; | |
931 | tx_packets = p->tx_packets; | |
932 | tx_bytes = p->tx_bytes; | |
933 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); | |
934 | ||
935 | stats->rx_packets += rx_packets; | |
936 | stats->rx_bytes += rx_bytes; | |
937 | stats->multicast += rx_multicast; | |
938 | stats->tx_packets += tx_packets; | |
939 | stats->tx_bytes += tx_bytes; | |
940 | /* | |
941 | * rx_dropped & tx_dropped are u32, updated | |
942 | * without syncp protection. | |
943 | */ | |
944 | rx_dropped += p->rx_dropped; | |
945 | tx_dropped += p->tx_dropped; | |
946 | } | |
947 | stats->rx_dropped = rx_dropped; | |
948 | stats->tx_dropped = tx_dropped; | |
949 | return stats; | |
950 | } | |
951 | ||
8e586137 | 952 | static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid) |
3d249d4c JP |
953 | { |
954 | struct team *team = netdev_priv(dev); | |
955 | struct team_port *port; | |
87002b03 | 956 | int err; |
3d249d4c | 957 | |
87002b03 JP |
958 | /* |
959 | * Alhough this is reader, it's guarded by team lock. It's not possible | |
960 | * to traverse list in reverse under rcu_read_lock | |
961 | */ | |
962 | mutex_lock(&team->lock); | |
963 | list_for_each_entry(port, &team->port_list, list) { | |
964 | err = vlan_vid_add(port->dev, vid); | |
965 | if (err) | |
966 | goto unwind; | |
3d249d4c | 967 | } |
87002b03 | 968 | mutex_unlock(&team->lock); |
8e586137 JP |
969 | |
970 | return 0; | |
87002b03 JP |
971 | |
972 | unwind: | |
973 | list_for_each_entry_continue_reverse(port, &team->port_list, list) | |
974 | vlan_vid_del(port->dev, vid); | |
975 | mutex_unlock(&team->lock); | |
976 | ||
977 | return err; | |
3d249d4c JP |
978 | } |
979 | ||
8e586137 | 980 | static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid) |
3d249d4c JP |
981 | { |
982 | struct team *team = netdev_priv(dev); | |
983 | struct team_port *port; | |
984 | ||
985 | rcu_read_lock(); | |
87002b03 JP |
986 | list_for_each_entry_rcu(port, &team->port_list, list) |
987 | vlan_vid_del(port->dev, vid); | |
3d249d4c | 988 | rcu_read_unlock(); |
8e586137 JP |
989 | |
990 | return 0; | |
3d249d4c JP |
991 | } |
992 | ||
993 | static int team_add_slave(struct net_device *dev, struct net_device *port_dev) | |
994 | { | |
995 | struct team *team = netdev_priv(dev); | |
996 | int err; | |
997 | ||
61dc3461 | 998 | mutex_lock(&team->lock); |
3d249d4c | 999 | err = team_port_add(team, port_dev); |
61dc3461 | 1000 | mutex_unlock(&team->lock); |
3d249d4c JP |
1001 | return err; |
1002 | } | |
1003 | ||
1004 | static int team_del_slave(struct net_device *dev, struct net_device *port_dev) | |
1005 | { | |
1006 | struct team *team = netdev_priv(dev); | |
1007 | int err; | |
1008 | ||
61dc3461 | 1009 | mutex_lock(&team->lock); |
3d249d4c | 1010 | err = team_port_del(team, port_dev); |
61dc3461 | 1011 | mutex_unlock(&team->lock); |
3d249d4c JP |
1012 | return err; |
1013 | } | |
1014 | ||
234a8fd4 JP |
1015 | static netdev_features_t team_fix_features(struct net_device *dev, |
1016 | netdev_features_t features) | |
1017 | { | |
1018 | struct team_port *port; | |
1019 | struct team *team = netdev_priv(dev); | |
1020 | netdev_features_t mask; | |
1021 | ||
1022 | mask = features; | |
1023 | features &= ~NETIF_F_ONE_FOR_ALL; | |
1024 | features |= NETIF_F_ALL_FOR_ALL; | |
1025 | ||
1026 | rcu_read_lock(); | |
1027 | list_for_each_entry_rcu(port, &team->port_list, list) { | |
1028 | features = netdev_increment_features(features, | |
1029 | port->dev->features, | |
1030 | mask); | |
1031 | } | |
1032 | rcu_read_unlock(); | |
1033 | return features; | |
1034 | } | |
1035 | ||
3d249d4c JP |
1036 | static const struct net_device_ops team_netdev_ops = { |
1037 | .ndo_init = team_init, | |
1038 | .ndo_uninit = team_uninit, | |
1039 | .ndo_open = team_open, | |
1040 | .ndo_stop = team_close, | |
1041 | .ndo_start_xmit = team_xmit, | |
1042 | .ndo_change_rx_flags = team_change_rx_flags, | |
1043 | .ndo_set_rx_mode = team_set_rx_mode, | |
1044 | .ndo_set_mac_address = team_set_mac_address, | |
1045 | .ndo_change_mtu = team_change_mtu, | |
1046 | .ndo_get_stats64 = team_get_stats64, | |
1047 | .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, | |
1048 | .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, | |
1049 | .ndo_add_slave = team_add_slave, | |
1050 | .ndo_del_slave = team_del_slave, | |
234a8fd4 | 1051 | .ndo_fix_features = team_fix_features, |
3d249d4c JP |
1052 | }; |
1053 | ||
1054 | ||
1055 | /*********************** | |
1056 | * rt netlink interface | |
1057 | ***********************/ | |
1058 | ||
1059 | static void team_setup(struct net_device *dev) | |
1060 | { | |
1061 | ether_setup(dev); | |
1062 | ||
1063 | dev->netdev_ops = &team_netdev_ops; | |
1064 | dev->destructor = team_destructor; | |
1065 | dev->tx_queue_len = 0; | |
1066 | dev->flags |= IFF_MULTICAST; | |
1067 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
1068 | ||
1069 | /* | |
1070 | * Indicate we support unicast address filtering. That way core won't | |
1071 | * bring us to promisc mode in case a unicast addr is added. | |
1072 | * Let this up to underlay drivers. | |
1073 | */ | |
1074 | dev->priv_flags |= IFF_UNICAST_FLT; | |
1075 | ||
1076 | dev->features |= NETIF_F_LLTX; | |
1077 | dev->features |= NETIF_F_GRO; | |
1078 | dev->hw_features = NETIF_F_HW_VLAN_TX | | |
1079 | NETIF_F_HW_VLAN_RX | | |
1080 | NETIF_F_HW_VLAN_FILTER; | |
1081 | ||
1082 | dev->features |= dev->hw_features; | |
1083 | } | |
1084 | ||
1085 | static int team_newlink(struct net *src_net, struct net_device *dev, | |
1086 | struct nlattr *tb[], struct nlattr *data[]) | |
1087 | { | |
1088 | int err; | |
1089 | ||
1090 | if (tb[IFLA_ADDRESS] == NULL) | |
7ce5d222 | 1091 | eth_hw_addr_random(dev); |
3d249d4c JP |
1092 | |
1093 | err = register_netdevice(dev); | |
1094 | if (err) | |
1095 | return err; | |
1096 | ||
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | static int team_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1101 | { | |
1102 | if (tb[IFLA_ADDRESS]) { | |
1103 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1104 | return -EINVAL; | |
1105 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1106 | return -EADDRNOTAVAIL; | |
1107 | } | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | static struct rtnl_link_ops team_link_ops __read_mostly = { | |
1112 | .kind = DRV_NAME, | |
1113 | .priv_size = sizeof(struct team), | |
1114 | .setup = team_setup, | |
1115 | .newlink = team_newlink, | |
1116 | .validate = team_validate, | |
1117 | }; | |
1118 | ||
1119 | ||
1120 | /*********************************** | |
1121 | * Generic netlink custom interface | |
1122 | ***********************************/ | |
1123 | ||
1124 | static struct genl_family team_nl_family = { | |
1125 | .id = GENL_ID_GENERATE, | |
1126 | .name = TEAM_GENL_NAME, | |
1127 | .version = TEAM_GENL_VERSION, | |
1128 | .maxattr = TEAM_ATTR_MAX, | |
1129 | .netnsok = true, | |
1130 | }; | |
1131 | ||
1132 | static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { | |
1133 | [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, | |
1134 | [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, | |
1135 | [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, | |
1136 | [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, | |
1137 | }; | |
1138 | ||
1139 | static const struct nla_policy | |
1140 | team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { | |
1141 | [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, | |
1142 | [TEAM_ATTR_OPTION_NAME] = { | |
1143 | .type = NLA_STRING, | |
1144 | .len = TEAM_STRING_MAX_LEN, | |
1145 | }, | |
1146 | [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, | |
1147 | [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, | |
1148 | [TEAM_ATTR_OPTION_DATA] = { | |
1149 | .type = NLA_BINARY, | |
1150 | .len = TEAM_STRING_MAX_LEN, | |
1151 | }, | |
1152 | }; | |
1153 | ||
1154 | static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) | |
1155 | { | |
1156 | struct sk_buff *msg; | |
1157 | void *hdr; | |
1158 | int err; | |
1159 | ||
1160 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1161 | if (!msg) | |
1162 | return -ENOMEM; | |
1163 | ||
1164 | hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, | |
1165 | &team_nl_family, 0, TEAM_CMD_NOOP); | |
1166 | if (IS_ERR(hdr)) { | |
1167 | err = PTR_ERR(hdr); | |
1168 | goto err_msg_put; | |
1169 | } | |
1170 | ||
1171 | genlmsg_end(msg, hdr); | |
1172 | ||
1173 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); | |
1174 | ||
1175 | err_msg_put: | |
1176 | nlmsg_free(msg); | |
1177 | ||
1178 | return err; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Netlink cmd functions should be locked by following two functions. | |
8c0713a5 | 1183 | * Since dev gets held here, that ensures dev won't disappear in between. |
3d249d4c JP |
1184 | */ |
1185 | static struct team *team_nl_team_get(struct genl_info *info) | |
1186 | { | |
1187 | struct net *net = genl_info_net(info); | |
1188 | int ifindex; | |
1189 | struct net_device *dev; | |
1190 | struct team *team; | |
1191 | ||
1192 | if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) | |
1193 | return NULL; | |
1194 | ||
1195 | ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); | |
8c0713a5 | 1196 | dev = dev_get_by_index(net, ifindex); |
3d249d4c | 1197 | if (!dev || dev->netdev_ops != &team_netdev_ops) { |
8c0713a5 JP |
1198 | if (dev) |
1199 | dev_put(dev); | |
3d249d4c JP |
1200 | return NULL; |
1201 | } | |
1202 | ||
1203 | team = netdev_priv(dev); | |
61dc3461 | 1204 | mutex_lock(&team->lock); |
3d249d4c JP |
1205 | return team; |
1206 | } | |
1207 | ||
1208 | static void team_nl_team_put(struct team *team) | |
1209 | { | |
61dc3461 | 1210 | mutex_unlock(&team->lock); |
8c0713a5 | 1211 | dev_put(team->dev); |
3d249d4c JP |
1212 | } |
1213 | ||
1214 | static int team_nl_send_generic(struct genl_info *info, struct team *team, | |
1215 | int (*fill_func)(struct sk_buff *skb, | |
1216 | struct genl_info *info, | |
1217 | int flags, struct team *team)) | |
1218 | { | |
1219 | struct sk_buff *skb; | |
1220 | int err; | |
1221 | ||
1222 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1223 | if (!skb) | |
1224 | return -ENOMEM; | |
1225 | ||
1226 | err = fill_func(skb, info, NLM_F_ACK, team); | |
1227 | if (err < 0) | |
1228 | goto err_fill; | |
1229 | ||
1230 | err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid); | |
1231 | return err; | |
1232 | ||
1233 | err_fill: | |
1234 | nlmsg_free(skb); | |
1235 | return err; | |
1236 | } | |
1237 | ||
b82b9183 JP |
1238 | static int team_nl_fill_options_get(struct sk_buff *skb, |
1239 | u32 pid, u32 seq, int flags, | |
1240 | struct team *team, bool fillall) | |
3d249d4c JP |
1241 | { |
1242 | struct nlattr *option_list; | |
1243 | void *hdr; | |
1244 | struct team_option *option; | |
1245 | ||
1246 | hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, | |
1247 | TEAM_CMD_OPTIONS_GET); | |
1248 | if (IS_ERR(hdr)) | |
1249 | return PTR_ERR(hdr); | |
1250 | ||
86ebb02d DM |
1251 | if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) |
1252 | goto nla_put_failure; | |
3d249d4c JP |
1253 | option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); |
1254 | if (!option_list) | |
1255 | return -EMSGSIZE; | |
1256 | ||
1257 | list_for_each_entry(option, &team->option_list, list) { | |
1258 | struct nlattr *option_item; | |
1259 | long arg; | |
1260 | ||
b82b9183 JP |
1261 | /* Include only changed options if fill all mode is not on */ |
1262 | if (!fillall && !option->changed) | |
1263 | continue; | |
3d249d4c JP |
1264 | option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); |
1265 | if (!option_item) | |
1266 | goto nla_put_failure; | |
86ebb02d DM |
1267 | if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) |
1268 | goto nla_put_failure; | |
b82b9183 | 1269 | if (option->changed) { |
86ebb02d DM |
1270 | if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) |
1271 | goto nla_put_failure; | |
b82b9183 JP |
1272 | option->changed = false; |
1273 | } | |
86ebb02d DM |
1274 | if (option->removed && |
1275 | nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) | |
1276 | goto nla_put_failure; | |
3d249d4c JP |
1277 | switch (option->type) { |
1278 | case TEAM_OPTION_TYPE_U32: | |
86ebb02d DM |
1279 | if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) |
1280 | goto nla_put_failure; | |
3d249d4c | 1281 | team_option_get(team, option, &arg); |
86ebb02d DM |
1282 | if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, arg)) |
1283 | goto nla_put_failure; | |
3d249d4c JP |
1284 | break; |
1285 | case TEAM_OPTION_TYPE_STRING: | |
86ebb02d DM |
1286 | if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) |
1287 | goto nla_put_failure; | |
3d249d4c | 1288 | team_option_get(team, option, &arg); |
86ebb02d DM |
1289 | if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, |
1290 | (char *) arg)) | |
1291 | goto nla_put_failure; | |
3d249d4c JP |
1292 | break; |
1293 | default: | |
1294 | BUG(); | |
1295 | } | |
1296 | nla_nest_end(skb, option_item); | |
1297 | } | |
1298 | ||
1299 | nla_nest_end(skb, option_list); | |
1300 | return genlmsg_end(skb, hdr); | |
1301 | ||
1302 | nla_put_failure: | |
1303 | genlmsg_cancel(skb, hdr); | |
1304 | return -EMSGSIZE; | |
1305 | } | |
1306 | ||
b82b9183 JP |
1307 | static int team_nl_fill_options_get_all(struct sk_buff *skb, |
1308 | struct genl_info *info, int flags, | |
1309 | struct team *team) | |
3d249d4c | 1310 | { |
b82b9183 JP |
1311 | return team_nl_fill_options_get(skb, info->snd_pid, |
1312 | info->snd_seq, NLM_F_ACK, | |
1313 | team, true); | |
3d249d4c JP |
1314 | } |
1315 | ||
1316 | static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) | |
1317 | { | |
1318 | struct team *team; | |
1319 | int err; | |
1320 | ||
1321 | team = team_nl_team_get(info); | |
1322 | if (!team) | |
1323 | return -EINVAL; | |
1324 | ||
b82b9183 | 1325 | err = team_nl_send_generic(info, team, team_nl_fill_options_get_all); |
3d249d4c JP |
1326 | |
1327 | team_nl_team_put(team); | |
1328 | ||
1329 | return err; | |
1330 | } | |
1331 | ||
1332 | static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) | |
1333 | { | |
1334 | struct team *team; | |
1335 | int err = 0; | |
1336 | int i; | |
1337 | struct nlattr *nl_option; | |
1338 | ||
1339 | team = team_nl_team_get(info); | |
1340 | if (!team) | |
1341 | return -EINVAL; | |
1342 | ||
1343 | err = -EINVAL; | |
1344 | if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { | |
1345 | err = -EINVAL; | |
1346 | goto team_put; | |
1347 | } | |
1348 | ||
1349 | nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { | |
1350 | struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1]; | |
1351 | enum team_option_type opt_type; | |
1352 | struct team_option *option; | |
1353 | char *opt_name; | |
1354 | bool opt_found = false; | |
1355 | ||
1356 | if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { | |
1357 | err = -EINVAL; | |
1358 | goto team_put; | |
1359 | } | |
1360 | err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX, | |
1361 | nl_option, team_nl_option_policy); | |
1362 | if (err) | |
1363 | goto team_put; | |
1364 | if (!mode_attrs[TEAM_ATTR_OPTION_NAME] || | |
1365 | !mode_attrs[TEAM_ATTR_OPTION_TYPE] || | |
1366 | !mode_attrs[TEAM_ATTR_OPTION_DATA]) { | |
1367 | err = -EINVAL; | |
1368 | goto team_put; | |
1369 | } | |
1370 | switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) { | |
1371 | case NLA_U32: | |
1372 | opt_type = TEAM_OPTION_TYPE_U32; | |
1373 | break; | |
1374 | case NLA_STRING: | |
1375 | opt_type = TEAM_OPTION_TYPE_STRING; | |
1376 | break; | |
1377 | default: | |
1378 | goto team_put; | |
1379 | } | |
1380 | ||
1381 | opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]); | |
1382 | list_for_each_entry(option, &team->option_list, list) { | |
1383 | long arg; | |
1384 | struct nlattr *opt_data_attr; | |
1385 | ||
1386 | if (option->type != opt_type || | |
1387 | strcmp(option->name, opt_name)) | |
1388 | continue; | |
1389 | opt_found = true; | |
1390 | opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA]; | |
1391 | switch (opt_type) { | |
1392 | case TEAM_OPTION_TYPE_U32: | |
1393 | arg = nla_get_u32(opt_data_attr); | |
1394 | break; | |
1395 | case TEAM_OPTION_TYPE_STRING: | |
1396 | arg = (long) nla_data(opt_data_attr); | |
1397 | break; | |
1398 | default: | |
1399 | BUG(); | |
1400 | } | |
1401 | err = team_option_set(team, option, &arg); | |
1402 | if (err) | |
1403 | goto team_put; | |
1404 | } | |
1405 | if (!opt_found) { | |
1406 | err = -ENOENT; | |
1407 | goto team_put; | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | team_put: | |
1412 | team_nl_team_put(team); | |
1413 | ||
1414 | return err; | |
1415 | } | |
1416 | ||
b82b9183 JP |
1417 | static int team_nl_fill_port_list_get(struct sk_buff *skb, |
1418 | u32 pid, u32 seq, int flags, | |
1419 | struct team *team, | |
1420 | bool fillall) | |
3d249d4c JP |
1421 | { |
1422 | struct nlattr *port_list; | |
1423 | void *hdr; | |
1424 | struct team_port *port; | |
1425 | ||
1426 | hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, | |
1427 | TEAM_CMD_PORT_LIST_GET); | |
1428 | if (IS_ERR(hdr)) | |
1429 | return PTR_ERR(hdr); | |
1430 | ||
86ebb02d DM |
1431 | if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) |
1432 | goto nla_put_failure; | |
3d249d4c JP |
1433 | port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); |
1434 | if (!port_list) | |
1435 | return -EMSGSIZE; | |
1436 | ||
1437 | list_for_each_entry(port, &team->port_list, list) { | |
1438 | struct nlattr *port_item; | |
1439 | ||
b82b9183 JP |
1440 | /* Include only changed ports if fill all mode is not on */ |
1441 | if (!fillall && !port->changed) | |
1442 | continue; | |
3d249d4c JP |
1443 | port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); |
1444 | if (!port_item) | |
1445 | goto nla_put_failure; | |
86ebb02d DM |
1446 | if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) |
1447 | goto nla_put_failure; | |
b82b9183 | 1448 | if (port->changed) { |
86ebb02d DM |
1449 | if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) |
1450 | goto nla_put_failure; | |
b82b9183 JP |
1451 | port->changed = false; |
1452 | } | |
86ebb02d DM |
1453 | if ((port->removed && |
1454 | nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || | |
1455 | (port->linkup && | |
1456 | nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || | |
1457 | nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->speed) || | |
1458 | nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex)) | |
1459 | goto nla_put_failure; | |
3d249d4c JP |
1460 | nla_nest_end(skb, port_item); |
1461 | } | |
1462 | ||
1463 | nla_nest_end(skb, port_list); | |
1464 | return genlmsg_end(skb, hdr); | |
1465 | ||
1466 | nla_put_failure: | |
1467 | genlmsg_cancel(skb, hdr); | |
1468 | return -EMSGSIZE; | |
1469 | } | |
1470 | ||
b82b9183 JP |
1471 | static int team_nl_fill_port_list_get_all(struct sk_buff *skb, |
1472 | struct genl_info *info, int flags, | |
1473 | struct team *team) | |
3d249d4c | 1474 | { |
b82b9183 JP |
1475 | return team_nl_fill_port_list_get(skb, info->snd_pid, |
1476 | info->snd_seq, NLM_F_ACK, | |
1477 | team, true); | |
3d249d4c JP |
1478 | } |
1479 | ||
1480 | static int team_nl_cmd_port_list_get(struct sk_buff *skb, | |
1481 | struct genl_info *info) | |
1482 | { | |
1483 | struct team *team; | |
1484 | int err; | |
1485 | ||
1486 | team = team_nl_team_get(info); | |
1487 | if (!team) | |
1488 | return -EINVAL; | |
1489 | ||
b82b9183 | 1490 | err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all); |
3d249d4c JP |
1491 | |
1492 | team_nl_team_put(team); | |
1493 | ||
1494 | return err; | |
1495 | } | |
1496 | ||
1497 | static struct genl_ops team_nl_ops[] = { | |
1498 | { | |
1499 | .cmd = TEAM_CMD_NOOP, | |
1500 | .doit = team_nl_cmd_noop, | |
1501 | .policy = team_nl_policy, | |
1502 | }, | |
1503 | { | |
1504 | .cmd = TEAM_CMD_OPTIONS_SET, | |
1505 | .doit = team_nl_cmd_options_set, | |
1506 | .policy = team_nl_policy, | |
1507 | .flags = GENL_ADMIN_PERM, | |
1508 | }, | |
1509 | { | |
1510 | .cmd = TEAM_CMD_OPTIONS_GET, | |
1511 | .doit = team_nl_cmd_options_get, | |
1512 | .policy = team_nl_policy, | |
1513 | .flags = GENL_ADMIN_PERM, | |
1514 | }, | |
1515 | { | |
1516 | .cmd = TEAM_CMD_PORT_LIST_GET, | |
1517 | .doit = team_nl_cmd_port_list_get, | |
1518 | .policy = team_nl_policy, | |
1519 | .flags = GENL_ADMIN_PERM, | |
1520 | }, | |
1521 | }; | |
1522 | ||
1523 | static struct genl_multicast_group team_change_event_mcgrp = { | |
1524 | .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, | |
1525 | }; | |
1526 | ||
b82b9183 | 1527 | static int team_nl_send_event_options_get(struct team *team) |
3d249d4c JP |
1528 | { |
1529 | struct sk_buff *skb; | |
1530 | int err; | |
1531 | struct net *net = dev_net(team->dev); | |
1532 | ||
1533 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1534 | if (!skb) | |
1535 | return -ENOMEM; | |
1536 | ||
b82b9183 | 1537 | err = team_nl_fill_options_get(skb, 0, 0, 0, team, false); |
3d249d4c JP |
1538 | if (err < 0) |
1539 | goto err_fill; | |
1540 | ||
1541 | err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, | |
1542 | GFP_KERNEL); | |
1543 | return err; | |
1544 | ||
1545 | err_fill: | |
1546 | nlmsg_free(skb); | |
1547 | return err; | |
1548 | } | |
1549 | ||
b82b9183 | 1550 | static int team_nl_send_event_port_list_get(struct team *team) |
3d249d4c JP |
1551 | { |
1552 | struct sk_buff *skb; | |
1553 | int err; | |
b82b9183 | 1554 | struct net *net = dev_net(team->dev); |
3d249d4c JP |
1555 | |
1556 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1557 | if (!skb) | |
1558 | return -ENOMEM; | |
1559 | ||
b82b9183 | 1560 | err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false); |
3d249d4c JP |
1561 | if (err < 0) |
1562 | goto err_fill; | |
1563 | ||
1564 | err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, | |
1565 | GFP_KERNEL); | |
1566 | return err; | |
1567 | ||
1568 | err_fill: | |
1569 | nlmsg_free(skb); | |
1570 | return err; | |
1571 | } | |
1572 | ||
1573 | static int team_nl_init(void) | |
1574 | { | |
1575 | int err; | |
1576 | ||
1577 | err = genl_register_family_with_ops(&team_nl_family, team_nl_ops, | |
1578 | ARRAY_SIZE(team_nl_ops)); | |
1579 | if (err) | |
1580 | return err; | |
1581 | ||
1582 | err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp); | |
1583 | if (err) | |
1584 | goto err_change_event_grp_reg; | |
1585 | ||
1586 | return 0; | |
1587 | ||
1588 | err_change_event_grp_reg: | |
1589 | genl_unregister_family(&team_nl_family); | |
1590 | ||
1591 | return err; | |
1592 | } | |
1593 | ||
1594 | static void team_nl_fini(void) | |
1595 | { | |
1596 | genl_unregister_family(&team_nl_family); | |
1597 | } | |
1598 | ||
1599 | ||
1600 | /****************** | |
1601 | * Change checkers | |
1602 | ******************/ | |
1603 | ||
b82b9183 | 1604 | static void __team_options_change_check(struct team *team) |
3d249d4c JP |
1605 | { |
1606 | int err; | |
1607 | ||
b82b9183 | 1608 | err = team_nl_send_event_options_get(team); |
3d249d4c JP |
1609 | if (err) |
1610 | netdev_warn(team->dev, "Failed to send options change via netlink\n"); | |
1611 | } | |
1612 | ||
1613 | /* rtnl lock is held */ | |
1614 | static void __team_port_change_check(struct team_port *port, bool linkup) | |
1615 | { | |
1616 | int err; | |
1617 | ||
b82b9183 | 1618 | if (!port->removed && port->linkup == linkup) |
3d249d4c JP |
1619 | return; |
1620 | ||
b82b9183 | 1621 | port->changed = true; |
3d249d4c JP |
1622 | port->linkup = linkup; |
1623 | if (linkup) { | |
1624 | struct ethtool_cmd ecmd; | |
1625 | ||
1626 | err = __ethtool_get_settings(port->dev, &ecmd); | |
1627 | if (!err) { | |
1628 | port->speed = ethtool_cmd_speed(&ecmd); | |
1629 | port->duplex = ecmd.duplex; | |
1630 | goto send_event; | |
1631 | } | |
1632 | } | |
1633 | port->speed = 0; | |
1634 | port->duplex = 0; | |
1635 | ||
1636 | send_event: | |
b82b9183 | 1637 | err = team_nl_send_event_port_list_get(port->team); |
3d249d4c JP |
1638 | if (err) |
1639 | netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n", | |
1640 | port->dev->name); | |
1641 | ||
1642 | } | |
1643 | ||
1644 | static void team_port_change_check(struct team_port *port, bool linkup) | |
1645 | { | |
1646 | struct team *team = port->team; | |
1647 | ||
61dc3461 | 1648 | mutex_lock(&team->lock); |
3d249d4c | 1649 | __team_port_change_check(port, linkup); |
61dc3461 | 1650 | mutex_unlock(&team->lock); |
3d249d4c JP |
1651 | } |
1652 | ||
1653 | /************************************ | |
1654 | * Net device notifier event handler | |
1655 | ************************************/ | |
1656 | ||
1657 | static int team_device_event(struct notifier_block *unused, | |
1658 | unsigned long event, void *ptr) | |
1659 | { | |
1660 | struct net_device *dev = (struct net_device *) ptr; | |
1661 | struct team_port *port; | |
1662 | ||
1663 | port = team_port_get_rtnl(dev); | |
1664 | if (!port) | |
1665 | return NOTIFY_DONE; | |
1666 | ||
1667 | switch (event) { | |
1668 | case NETDEV_UP: | |
1669 | if (netif_carrier_ok(dev)) | |
1670 | team_port_change_check(port, true); | |
1671 | case NETDEV_DOWN: | |
1672 | team_port_change_check(port, false); | |
1673 | case NETDEV_CHANGE: | |
1674 | if (netif_running(port->dev)) | |
1675 | team_port_change_check(port, | |
1676 | !!netif_carrier_ok(port->dev)); | |
1677 | break; | |
1678 | case NETDEV_UNREGISTER: | |
1679 | team_del_slave(port->team->dev, dev); | |
1680 | break; | |
1681 | case NETDEV_FEAT_CHANGE: | |
1682 | team_compute_features(port->team); | |
1683 | break; | |
1684 | case NETDEV_CHANGEMTU: | |
1685 | /* Forbid to change mtu of underlaying device */ | |
1686 | return NOTIFY_BAD; | |
1687 | case NETDEV_PRE_TYPE_CHANGE: | |
1688 | /* Forbid to change type of underlaying device */ | |
1689 | return NOTIFY_BAD; | |
1690 | } | |
1691 | return NOTIFY_DONE; | |
1692 | } | |
1693 | ||
1694 | static struct notifier_block team_notifier_block __read_mostly = { | |
1695 | .notifier_call = team_device_event, | |
1696 | }; | |
1697 | ||
1698 | ||
1699 | /*********************** | |
1700 | * Module init and exit | |
1701 | ***********************/ | |
1702 | ||
1703 | static int __init team_module_init(void) | |
1704 | { | |
1705 | int err; | |
1706 | ||
1707 | register_netdevice_notifier(&team_notifier_block); | |
1708 | ||
1709 | err = rtnl_link_register(&team_link_ops); | |
1710 | if (err) | |
1711 | goto err_rtnl_reg; | |
1712 | ||
1713 | err = team_nl_init(); | |
1714 | if (err) | |
1715 | goto err_nl_init; | |
1716 | ||
1717 | return 0; | |
1718 | ||
1719 | err_nl_init: | |
1720 | rtnl_link_unregister(&team_link_ops); | |
1721 | ||
1722 | err_rtnl_reg: | |
1723 | unregister_netdevice_notifier(&team_notifier_block); | |
1724 | ||
1725 | return err; | |
1726 | } | |
1727 | ||
1728 | static void __exit team_module_exit(void) | |
1729 | { | |
1730 | team_nl_fini(); | |
1731 | rtnl_link_unregister(&team_link_ops); | |
1732 | unregister_netdevice_notifier(&team_notifier_block); | |
1733 | } | |
1734 | ||
1735 | module_init(team_module_init); | |
1736 | module_exit(team_module_exit); | |
1737 | ||
1738 | MODULE_LICENSE("GPL v2"); | |
1739 | MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); | |
1740 | MODULE_DESCRIPTION("Ethernet team device driver"); | |
1741 | MODULE_ALIAS_RTNL_LINK(DRV_NAME); |