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