projects/linux·blob v7.2-rc7 · refs

1444 lines · 37.8 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2016 Jiri Pirko <[email protected]>
5 */
6
7#include <linux/device.h>
8#include <net/genetlink.h>
9#include <net/sock.h>
10#include "devl_internal.h"
11
12struct devlink_info_req {
13 struct sk_buff *msg;
14 void (*version_cb)(const char *version_name,
15 enum devlink_info_version_type version_type,
16 void *version_cb_priv);
17 void *version_cb_priv;
18};
19
20struct devlink_reload_combination {
21 enum devlink_reload_action action;
22 enum devlink_reload_limit limit;
23};
24
25static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
26 {
27 /* can't reinitialize driver with no down time */
28 .action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
29 .limit = DEVLINK_RELOAD_LIMIT_NO_RESET,
30 },
31};
32
33static bool
34devlink_reload_combination_is_invalid(enum devlink_reload_action action,
35 enum devlink_reload_limit limit)
36{
37 int i;
38
39 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)
40 if (devlink_reload_invalid_combinations[i].action == action &&
41 devlink_reload_invalid_combinations[i].limit == limit)
42 return true;
43 return false;
44}
45
46static bool
47devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
48{
49 return test_bit(action, &devlink->ops->reload_actions);
50}
51
52static bool
53devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit)
54{
55 return test_bit(limit, &devlink->ops->reload_limits);
56}
57
58static int devlink_reload_stat_put(struct sk_buff *msg,
59 enum devlink_reload_limit limit, u32 value)
60{
61 struct nlattr *reload_stats_entry;
62
63 reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY);
64 if (!reload_stats_entry)
65 return -EMSGSIZE;
66
67 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) ||
68 nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value))
69 goto nla_put_failure;
70 nla_nest_end(msg, reload_stats_entry);
71 return 0;
72
73nla_put_failure:
74 nla_nest_cancel(msg, reload_stats_entry);
75 return -EMSGSIZE;
76}
77
78static int
79devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink, bool is_remote)
80{
81 struct nlattr *reload_stats_attr, *act_info, *act_stats;
82 int i, j, stat_idx;
83 u32 value;
84
85 if (!is_remote)
86 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS);
87 else
88 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_REMOTE_RELOAD_STATS);
89
90 if (!reload_stats_attr)
91 return -EMSGSIZE;
92
93 for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) {
94 if ((!is_remote &&
95 !devlink_reload_action_is_supported(devlink, i)) ||
96 i == DEVLINK_RELOAD_ACTION_UNSPEC)
97 continue;
98 act_info = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_INFO);
99 if (!act_info)
100 goto nla_put_failure;
101
102 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, i))
103 goto action_info_nest_cancel;
104 act_stats = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_STATS);
105 if (!act_stats)
106 goto action_info_nest_cancel;
107
108 for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) {
109 /* Remote stats are shown even if not locally supported.
110 * Stats of actions with unspecified limit are shown
111 * though drivers don't need to register unspecified
112 * limit.
113 */
114 if ((!is_remote && j != DEVLINK_RELOAD_LIMIT_UNSPEC &&
115 !devlink_reload_limit_is_supported(devlink, j)) ||
116 devlink_reload_combination_is_invalid(i, j))
117 continue;
118
119 stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i;
120 if (!is_remote)
121 value = devlink->stats.reload_stats[stat_idx];
122 else
123 value = devlink->stats.remote_reload_stats[stat_idx];
124 if (devlink_reload_stat_put(msg, j, value))
125 goto action_stats_nest_cancel;
126 }
127 nla_nest_end(msg, act_stats);
128 nla_nest_end(msg, act_info);
129 }
130 nla_nest_end(msg, reload_stats_attr);
131 return 0;
132
133action_stats_nest_cancel:
134 nla_nest_cancel(msg, act_stats);
135action_info_nest_cancel:
136 nla_nest_cancel(msg, act_info);
137nla_put_failure:
138 nla_nest_cancel(msg, reload_stats_attr);
139 return -EMSGSIZE;
140}
141
142static int devlink_nl_nested_fill(struct sk_buff *msg, struct devlink *devlink)
143{
144 unsigned long rel_index;
145 void *unused;
146 int err;
147
148 xa_for_each(&devlink->nested_rels, rel_index, unused) {
149 err = devlink_rel_devlink_handle_put(msg, devlink,
150 rel_index,
151 DEVLINK_ATTR_NESTED_DEVLINK,
152 NULL);
153 if (err)
154 return err;
155 }
156 return 0;
157}
158
159static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
160 enum devlink_command cmd, u32 portid,
161 u32 seq, int flags)
162{
163 struct nlattr *dev_stats;
164 void *hdr;
165
166 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
167 if (!hdr)
168 return -EMSGSIZE;
169
170 if (devlink_nl_put_handle(msg, devlink))
171 goto nla_put_failure;
172 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
173 goto nla_put_failure;
174
175 dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS);
176 if (!dev_stats)
177 goto nla_put_failure;
178
179 if (devlink_reload_stats_put(msg, devlink, false))
180 goto dev_stats_nest_cancel;
181 if (devlink_reload_stats_put(msg, devlink, true))
182 goto dev_stats_nest_cancel;
183
184 nla_nest_end(msg, dev_stats);
185
186 if (devlink_nl_nested_fill(msg, devlink))
187 goto nla_put_failure;
188
189 genlmsg_end(msg, hdr);
190 return 0;
191
192dev_stats_nest_cancel:
193 nla_nest_cancel(msg, dev_stats);
194nla_put_failure:
195 genlmsg_cancel(msg, hdr);
196 return -EMSGSIZE;
197}
198
199static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
200{
201 struct sk_buff *msg;
202 int err;
203
204 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
205 WARN_ON(!devl_is_registered(devlink));
206
207 if (!devlink_nl_notify_need(devlink))
208 return;
209
210 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
211 if (!msg)
212 return;
213
214 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
215 if (err) {
216 nlmsg_free(msg);
217 return;
218 }
219
220 devlink_nl_notify_send(devlink, msg);
221}
222
223int devlink_nl_get_doit(struct sk_buff *skb, struct genl_info *info)
224{
225 struct devlink *devlink = info->user_ptr[0];
226 struct sk_buff *msg;
227 int err;
228
229 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
230 if (!msg)
231 return -ENOMEM;
232
233 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
234 info->snd_portid, info->snd_seq, 0);
235 if (err) {
236 nlmsg_free(msg);
237 return err;
238 }
239
240 return genlmsg_reply(msg, info);
241}
242
243static int
244devlink_nl_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
245 struct netlink_callback *cb, int flags)
246{
247 return devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
248 NETLINK_CB(cb->skb).portid,
249 cb->nlh->nlmsg_seq, flags);
250}
251
252int devlink_nl_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb)
253{
254 return devlink_nl_dumpit(msg, cb, devlink_nl_get_dump_one);
255}
256
257static void devlink_rel_notify_cb(struct devlink *devlink, u32 obj_index)
258{
259 devlink_notify(devlink, DEVLINK_CMD_NEW);
260}
261
262static void devlink_rel_cleanup_cb(struct devlink *devlink, u32 obj_index,
263 u32 rel_index)
264{
265 xa_erase(&devlink->nested_rels, rel_index);
266}
267
268int devl_nested_devlink_set(struct devlink *devlink,
269 struct devlink *nested_devlink)
270{
271 u32 rel_index;
272 int err;
273
274 err = devlink_rel_nested_in_add(&rel_index, devlink->index, 0,
275 devlink_rel_notify_cb,
276 devlink_rel_cleanup_cb,
277 nested_devlink);
278 if (err)
279 return err;
280 return xa_insert(&devlink->nested_rels, rel_index,
281 xa_mk_value(0), GFP_KERNEL);
282}
283EXPORT_SYMBOL_GPL(devl_nested_devlink_set);
284
285void devlink_notify_register(struct devlink *devlink)
286{
287 devlink_notify(devlink, DEVLINK_CMD_NEW);
288 devlink_linecards_notify_register(devlink);
289 devlink_ports_notify_register(devlink);
290 devlink_trap_policers_notify_register(devlink);
291 devlink_trap_groups_notify_register(devlink);
292 devlink_traps_notify_register(devlink);
293 devlink_rates_notify_register(devlink);
294 devlink_regions_notify_register(devlink);
295 devlink_params_notify_register(devlink);
296}
297
298void devlink_notify_unregister(struct devlink *devlink)
299{
300 devlink_params_notify_unregister(devlink);
301 devlink_regions_notify_unregister(devlink);
302 devlink_rates_notify_unregister(devlink);
303 devlink_traps_notify_unregister(devlink);
304 devlink_trap_groups_notify_unregister(devlink);
305 devlink_trap_policers_notify_unregister(devlink);
306 devlink_ports_notify_unregister(devlink);
307 devlink_linecards_notify_unregister(devlink);
308 devlink_notify(devlink, DEVLINK_CMD_DEL);
309}
310
311static void devlink_reload_failed_set(struct devlink *devlink,
312 bool reload_failed)
313{
314 if (devlink->reload_failed == reload_failed)
315 return;
316 devlink->reload_failed = reload_failed;
317 devlink_notify(devlink, DEVLINK_CMD_NEW);
318}
319
320bool devlink_is_reload_failed(const struct devlink *devlink)
321{
322 return devlink->reload_failed;
323}
324EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
325
326static void
327__devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats,
328 enum devlink_reload_limit limit, u32 actions_performed)
329{
330 unsigned long actions = actions_performed;
331 int stat_idx;
332 int action;
333
334 for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) {
335 stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action;
336 reload_stats[stat_idx]++;
337 }
338 devlink_notify(devlink, DEVLINK_CMD_NEW);
339}
340
341static void
342devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit,
343 u32 actions_performed)
344{
345 __devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit,
346 actions_performed);
347}
348
349/**
350 * devlink_remote_reload_actions_performed - Update devlink on reload actions
351 * performed which are not a direct result of devlink reload call.
352 *
353 * This should be called by a driver after performing reload actions in case it was not
354 * a result of devlink reload call. For example fw_activate was performed as a result
355 * of devlink reload triggered fw_activate on another host.
356 * The motivation for this function is to keep data on reload actions performed on this
357 * function whether it was done due to direct devlink reload call or not.
358 *
359 * @devlink: devlink
360 * @limit: reload limit
361 * @actions_performed: bitmask of actions performed
362 */
363void devlink_remote_reload_actions_performed(struct devlink *devlink,
364 enum devlink_reload_limit limit,
365 u32 actions_performed)
366{
367 if (WARN_ON(!actions_performed ||
368 actions_performed & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
369 actions_performed >= BIT(__DEVLINK_RELOAD_ACTION_MAX) ||
370 limit > DEVLINK_RELOAD_LIMIT_MAX))
371 return;
372
373 __devlink_reload_stats_update(devlink, devlink->stats.remote_reload_stats, limit,
374 actions_performed);
375}
376EXPORT_SYMBOL_GPL(devlink_remote_reload_actions_performed);
377
378static struct net *devlink_netns_get(struct sk_buff *skb,
379 struct genl_info *info)
380{
381 struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
382 struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
383 struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
384 struct net *net;
385
386 if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
387 NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
388 return ERR_PTR(-EINVAL);
389 }
390
391 if (netns_pid_attr) {
392 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
393 } else if (netns_fd_attr) {
394 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
395 } else if (netns_id_attr) {
396 net = get_net_ns_by_id(sock_net(skb->sk),
397 nla_get_u32(netns_id_attr));
398 if (!net)
399 net = ERR_PTR(-EINVAL);
400 } else {
401 WARN_ON(1);
402 net = ERR_PTR(-EINVAL);
403 }
404 if (IS_ERR(net)) {
405 NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
406 return ERR_PTR(-EINVAL);
407 }
408 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
409 put_net(net);
410 return ERR_PTR(-EPERM);
411 }
412 return net;
413}
414
415static void devlink_reload_netns_change(struct devlink *devlink,
416 struct net *curr_net,
417 struct net *dest_net)
418{
419 /* Userspace needs to be notified about devlink objects
420 * removed from original and entering new network namespace.
421 * The rest of the devlink objects are re-created during
422 * reload process so the notifications are generated separatelly.
423 */
424 devlink_notify_unregister(devlink);
425 write_pnet(&devlink->_net, dest_net);
426 devlink_notify_register(devlink);
427 devlink_rel_nested_in_notify(devlink);
428}
429
430static void devlink_reload_reinit_sanity_check(struct devlink *devlink)
431{
432 WARN_ON(!list_empty(&devlink->trap_policer_list));
433 WARN_ON(!list_empty(&devlink->trap_group_list));
434 WARN_ON(!list_empty(&devlink->trap_list));
435 WARN_ON(!list_empty(&devlink->dpipe_table_list));
436 WARN_ON(!list_empty(&devlink->sb_list));
437 WARN_ON(devlink_rates_check(devlink, NULL, NULL));
438 WARN_ON(!list_empty(&devlink->linecard_list));
439 WARN_ON(!xa_empty(&devlink->ports));
440}
441
442int devlink_reload(struct devlink *devlink, struct net *dest_net,
443 enum devlink_reload_action action,
444 enum devlink_reload_limit limit,
445 u32 *actions_performed, struct netlink_ext_ack *extack)
446{
447 u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
448 struct net *curr_net;
449 int err;
450
451 /* Make sure the reload operations are invoked with the device lock
452 * held to allow drivers to trigger functionality that expects it
453 * (e.g., PCI reset) and to close possible races between these
454 * operations and probe/remove.
455 */
456 if (devlink->dev)
457 device_lock_assert(devlink->dev);
458
459 memcpy(remote_reload_stats, devlink->stats.remote_reload_stats,
460 sizeof(remote_reload_stats));
461
462 err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
463 if (err)
464 return err;
465
466 curr_net = devlink_net(devlink);
467 if (dest_net && !net_eq(dest_net, curr_net))
468 devlink_reload_netns_change(devlink, curr_net, dest_net);
469
470 if (action == DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
471 devlink_params_driverinit_load_new(devlink);
472 devlink_reload_reinit_sanity_check(devlink);
473 }
474
475 err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack);
476 devlink_reload_failed_set(devlink, !!err);
477 if (err)
478 return err;
479
480 WARN_ON(!(*actions_performed & BIT(action)));
481 /* Catch driver on updating the remote action within devlink reload */
482 WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats,
483 sizeof(remote_reload_stats)));
484 devlink_reload_stats_update(devlink, limit, *actions_performed);
485 return 0;
486}
487
488static int
489devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed,
490 enum devlink_command cmd, struct genl_info *info)
491{
492 struct sk_buff *msg;
493 void *hdr;
494
495 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
496 if (!msg)
497 return -ENOMEM;
498
499 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd);
500 if (!hdr)
501 goto free_msg;
502
503 if (devlink_nl_put_handle(msg, devlink))
504 goto nla_put_failure;
505
506 if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed,
507 actions_performed))
508 goto nla_put_failure;
509 genlmsg_end(msg, hdr);
510
511 return genlmsg_reply(msg, info);
512
513nla_put_failure:
514 genlmsg_cancel(msg, hdr);
515free_msg:
516 nlmsg_free(msg);
517 return -EMSGSIZE;
518}
519
520int devlink_nl_reload_doit(struct sk_buff *skb, struct genl_info *info)
521{
522 struct devlink *devlink = info->user_ptr[0];
523 enum devlink_reload_action action;
524 enum devlink_reload_limit limit;
525 struct net *dest_net = NULL;
526 u32 actions_performed;
527 int err;
528
529 err = devlink_resources_validate(devlink, NULL, info);
530 if (err) {
531 NL_SET_ERR_MSG(info->extack, "resources size validation failed");
532 return err;
533 }
534
535 action = nla_get_u8_default(info->attrs[DEVLINK_ATTR_RELOAD_ACTION],
536 DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
537
538 if (!devlink_reload_action_is_supported(devlink, action)) {
539 NL_SET_ERR_MSG(info->extack, "Requested reload action is not supported by the driver");
540 return -EOPNOTSUPP;
541 }
542
543 limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
544 if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
545 struct nla_bitfield32 limits;
546 u32 limits_selected;
547
548 limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
549 limits_selected = limits.value & limits.selector;
550 if (!limits_selected) {
551 NL_SET_ERR_MSG(info->extack, "Invalid limit selected");
552 return -EINVAL;
553 }
554 for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
555 if (limits_selected & BIT(limit))
556 break;
557 /* UAPI enables multiselection, but currently it is not used */
558 if (limits_selected != BIT(limit)) {
559 NL_SET_ERR_MSG(info->extack, "Multiselection of limit is not supported");
560 return -EOPNOTSUPP;
561 }
562 if (!devlink_reload_limit_is_supported(devlink, limit)) {
563 NL_SET_ERR_MSG(info->extack, "Requested limit is not supported by the driver");
564 return -EOPNOTSUPP;
565 }
566 if (devlink_reload_combination_is_invalid(action, limit)) {
567 NL_SET_ERR_MSG(info->extack, "Requested limit is invalid for this action");
568 return -EINVAL;
569 }
570 }
571 if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
572 info->attrs[DEVLINK_ATTR_NETNS_FD] ||
573 info->attrs[DEVLINK_ATTR_NETNS_ID]) {
574 dest_net = devlink_netns_get(skb, info);
575 if (IS_ERR(dest_net))
576 return PTR_ERR(dest_net);
577 if (!net_eq(dest_net, devlink_net(devlink)) &&
578 action != DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
579 NL_SET_ERR_MSG_MOD(info->extack,
580 "Changing namespace is only supported for reinit action");
581 put_net(dest_net);
582 return -EOPNOTSUPP;
583 }
584 }
585
586 err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
587
588 if (dest_net)
589 put_net(dest_net);
590
591 if (err)
592 return err;
593 /* For backward compatibility generate reply only if attributes used by user */
594 if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
595 return 0;
596
597 return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
598 DEVLINK_CMD_RELOAD, info);
599}
600
601bool devlink_reload_actions_valid(const struct devlink_ops *ops)
602{
603 const struct devlink_reload_combination *comb;
604 int i;
605
606 if (!devlink_reload_supported(ops)) {
607 if (WARN_ON(ops->reload_actions))
608 return false;
609 return true;
610 }
611
612 if (WARN_ON(!ops->reload_actions ||
613 ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
614 ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
615 return false;
616
617 if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
618 ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
619 return false;
620
621 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) {
622 comb = &devlink_reload_invalid_combinations[i];
623 if (ops->reload_actions == BIT(comb->action) &&
624 ops->reload_limits == BIT(comb->limit))
625 return false;
626 }
627 return true;
628}
629
630static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
631 enum devlink_command cmd, u32 portid,
632 u32 seq, int flags)
633{
634 const struct devlink_ops *ops = devlink->ops;
635 enum devlink_eswitch_encap_mode encap_mode;
636 u8 inline_mode;
637 void *hdr;
638 int err = 0;
639 u16 mode;
640
641 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
642 if (!hdr)
643 return -EMSGSIZE;
644
645 err = devlink_nl_put_handle(msg, devlink);
646 if (err)
647 goto nla_put_failure;
648
649 if (ops->eswitch_mode_get) {
650 err = ops->eswitch_mode_get(devlink, &mode);
651 if (err)
652 goto nla_put_failure;
653 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
654 if (err)
655 goto nla_put_failure;
656 }
657
658 if (ops->eswitch_inline_mode_get) {
659 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
660 if (err)
661 goto nla_put_failure;
662 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
663 inline_mode);
664 if (err)
665 goto nla_put_failure;
666 }
667
668 if (ops->eswitch_encap_mode_get) {
669 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
670 if (err)
671 goto nla_put_failure;
672 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
673 if (err)
674 goto nla_put_failure;
675 }
676
677 genlmsg_end(msg, hdr);
678 return 0;
679
680nla_put_failure:
681 genlmsg_cancel(msg, hdr);
682 return err;
683}
684
685int devlink_nl_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info)
686{
687 struct devlink *devlink = info->user_ptr[0];
688 struct sk_buff *msg;
689 int err;
690
691 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
692 if (!msg)
693 return -ENOMEM;
694
695 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
696 info->snd_portid, info->snd_seq, 0);
697
698 if (err) {
699 nlmsg_free(msg);
700 return err;
701 }
702
703 return genlmsg_reply(msg, info);
704}
705
706int devlink_nl_eswitch_set_doit(struct sk_buff *skb, struct genl_info *info)
707{
708 struct devlink *devlink = info->user_ptr[0];
709 const struct devlink_ops *ops = devlink->ops;
710 enum devlink_eswitch_encap_mode encap_mode;
711 u8 inline_mode;
712 int err = 0;
713 u16 mode;
714
715 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
716 if (!ops->eswitch_mode_set)
717 return -EOPNOTSUPP;
718 err = devlink_rates_check(devlink, devlink_rate_is_node,
719 info->extack);
720 if (err)
721 return err;
722 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
723 err = ops->eswitch_mode_set(devlink, mode, info->extack);
724 if (err)
725 return err;
726 }
727
728 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
729 if (!ops->eswitch_inline_mode_set)
730 return -EOPNOTSUPP;
731 inline_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
732 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
733 info->extack);
734 if (err)
735 return err;
736 }
737
738 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
739 if (!ops->eswitch_encap_mode_set)
740 return -EOPNOTSUPP;
741 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
742 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
743 info->extack);
744 if (err)
745 return err;
746 }
747
748 return 0;
749}
750
751int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
752{
753 if (!req->msg)
754 return 0;
755 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
756}
757EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
758
759int devlink_info_board_serial_number_put(struct devlink_info_req *req,
760 const char *bsn)
761{
762 if (!req->msg)
763 return 0;
764 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER,
765 bsn);
766}
767EXPORT_SYMBOL_GPL(devlink_info_board_serial_number_put);
768
769static int devlink_info_version_put(struct devlink_info_req *req, int attr,
770 const char *version_name,
771 const char *version_value,
772 enum devlink_info_version_type version_type)
773{
774 struct nlattr *nest;
775 int err;
776
777 if (req->version_cb)
778 req->version_cb(version_name, version_type,
779 req->version_cb_priv);
780
781 if (!req->msg || !*version_value)
782 return 0;
783
784 nest = nla_nest_start_noflag(req->msg, attr);
785 if (!nest)
786 return -EMSGSIZE;
787
788 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
789 version_name);
790 if (err)
791 goto nla_put_failure;
792
793 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
794 version_value);
795 if (err)
796 goto nla_put_failure;
797
798 nla_nest_end(req->msg, nest);
799
800 return 0;
801
802nla_put_failure:
803 nla_nest_cancel(req->msg, nest);
804 return err;
805}
806
807int devlink_info_version_fixed_put(struct devlink_info_req *req,
808 const char *version_name,
809 const char *version_value)
810{
811 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
812 version_name, version_value,
813 DEVLINK_INFO_VERSION_TYPE_NONE);
814}
815EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
816
817int devlink_info_version_stored_put(struct devlink_info_req *req,
818 const char *version_name,
819 const char *version_value)
820{
821 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
822 version_name, version_value,
823 DEVLINK_INFO_VERSION_TYPE_NONE);
824}
825EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
826
827int devlink_info_version_stored_put_ext(struct devlink_info_req *req,
828 const char *version_name,
829 const char *version_value,
830 enum devlink_info_version_type version_type)
831{
832 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
833 version_name, version_value,
834 version_type);
835}
836EXPORT_SYMBOL_GPL(devlink_info_version_stored_put_ext);
837
838int devlink_info_version_running_put(struct devlink_info_req *req,
839 const char *version_name,
840 const char *version_value)
841{
842 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
843 version_name, version_value,
844 DEVLINK_INFO_VERSION_TYPE_NONE);
845}
846EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
847
848int devlink_info_version_running_put_ext(struct devlink_info_req *req,
849 const char *version_name,
850 const char *version_value,
851 enum devlink_info_version_type version_type)
852{
853 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
854 version_name, version_value,
855 version_type);
856}
857EXPORT_SYMBOL_GPL(devlink_info_version_running_put_ext);
858
859static int devlink_nl_driver_info_get(const struct device_driver *drv,
860 struct devlink_info_req *req)
861{
862 if (!drv)
863 return 0;
864
865 if (drv->name[0])
866 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME,
867 drv->name);
868
869 return 0;
870}
871
872static int
873devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
874 enum devlink_command cmd, u32 portid,
875 u32 seq, int flags, struct netlink_ext_ack *extack)
876{
877 struct devlink_info_req req = {};
878 void *hdr;
879 int err;
880
881 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
882 if (!hdr)
883 return -EMSGSIZE;
884
885 err = -EMSGSIZE;
886 if (devlink_nl_put_handle(msg, devlink))
887 goto err_cancel_msg;
888
889 req.msg = msg;
890 if (devlink->ops->info_get) {
891 err = devlink->ops->info_get(devlink, &req, extack);
892 if (err)
893 goto err_cancel_msg;
894 }
895
896 err = devlink_nl_driver_info_get(devlink->dev_driver, &req);
897 if (err)
898 goto err_cancel_msg;
899
900 genlmsg_end(msg, hdr);
901 return 0;
902
903err_cancel_msg:
904 genlmsg_cancel(msg, hdr);
905 return err;
906}
907
908int devlink_nl_info_get_doit(struct sk_buff *skb, struct genl_info *info)
909{
910 struct devlink *devlink = info->user_ptr[0];
911 struct sk_buff *msg;
912 int err;
913
914 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
915 if (!msg)
916 return -ENOMEM;
917
918 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
919 info->snd_portid, info->snd_seq, 0,
920 info->extack);
921 if (err) {
922 nlmsg_free(msg);
923 return err;
924 }
925
926 return genlmsg_reply(msg, info);
927}
928
929static int
930devlink_nl_info_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
931 struct netlink_callback *cb, int flags)
932{
933 int err;
934
935 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
936 NETLINK_CB(cb->skb).portid,
937 cb->nlh->nlmsg_seq, flags,
938 cb->extack);
939 if (err == -EOPNOTSUPP)
940 err = 0;
941 return err;
942}
943
944int devlink_nl_info_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb)
945{
946 return devlink_nl_dumpit(msg, cb, devlink_nl_info_get_dump_one);
947}
948
949static int devlink_nl_flash_update_fill(struct sk_buff *msg,
950 struct devlink *devlink,
951 enum devlink_command cmd,
952 struct devlink_flash_notify *params)
953{
954 void *hdr;
955
956 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
957 if (!hdr)
958 return -EMSGSIZE;
959
960 if (devlink_nl_put_handle(msg, devlink))
961 goto nla_put_failure;
962
963 if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
964 goto out;
965
966 if (params->status_msg &&
967 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
968 params->status_msg))
969 goto nla_put_failure;
970 if (params->component &&
971 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
972 params->component))
973 goto nla_put_failure;
974 if (devlink_nl_put_u64(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
975 params->done))
976 goto nla_put_failure;
977 if (devlink_nl_put_u64(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
978 params->total))
979 goto nla_put_failure;
980 if (devlink_nl_put_u64(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,
981 params->timeout))
982 goto nla_put_failure;
983
984out:
985 genlmsg_end(msg, hdr);
986 return 0;
987
988nla_put_failure:
989 genlmsg_cancel(msg, hdr);
990 return -EMSGSIZE;
991}
992
993static void __devlink_flash_update_notify(struct devlink *devlink,
994 enum devlink_command cmd,
995 struct devlink_flash_notify *params)
996{
997 struct sk_buff *msg;
998 int err;
999
1000 WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
1001 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
1002 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
1003
1004 if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
1005 return;
1006
1007 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1008 if (!msg)
1009 return;
1010
1011 err = devlink_nl_flash_update_fill(msg, devlink, cmd, params);
1012 if (err)
1013 goto out_free_msg;
1014
1015 devlink_nl_notify_send(devlink, msg);
1016 return;
1017
1018out_free_msg:
1019 nlmsg_free(msg);
1020}
1021
1022static void devlink_flash_update_begin_notify(struct devlink *devlink)
1023{
1024 struct devlink_flash_notify params = {};
1025
1026 __devlink_flash_update_notify(devlink,
1027 DEVLINK_CMD_FLASH_UPDATE,
1028 &params);
1029}
1030
1031static void devlink_flash_update_end_notify(struct devlink *devlink)
1032{
1033 struct devlink_flash_notify params = {};
1034
1035 __devlink_flash_update_notify(devlink,
1036 DEVLINK_CMD_FLASH_UPDATE_END,
1037 &params);
1038}
1039
1040void devlink_flash_update_status_notify(struct devlink *devlink,
1041 const char *status_msg,
1042 const char *component,
1043 unsigned long done,
1044 unsigned long total)
1045{
1046 struct devlink_flash_notify params = {
1047 .status_msg = status_msg,
1048 .component = component,
1049 .done = done,
1050 .total = total,
1051 };
1052
1053 __devlink_flash_update_notify(devlink,
1054 DEVLINK_CMD_FLASH_UPDATE_STATUS,
1055 &params);
1056}
1057EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
1058
1059void devlink_flash_update_timeout_notify(struct devlink *devlink,
1060 const char *status_msg,
1061 const char *component,
1062 unsigned long timeout)
1063{
1064 struct devlink_flash_notify params = {
1065 .status_msg = status_msg,
1066 .component = component,
1067 .timeout = timeout,
1068 };
1069
1070 __devlink_flash_update_notify(devlink,
1071 DEVLINK_CMD_FLASH_UPDATE_STATUS,
1072 &params);
1073}
1074EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
1075
1076struct devlink_flash_component_lookup_ctx {
1077 const char *lookup_name;
1078 bool lookup_name_found;
1079};
1080
1081static void
1082devlink_flash_component_lookup_cb(const char *version_name,
1083 enum devlink_info_version_type version_type,
1084 void *version_cb_priv)
1085{
1086 struct devlink_flash_component_lookup_ctx *lookup_ctx = version_cb_priv;
1087
1088 if (version_type != DEVLINK_INFO_VERSION_TYPE_COMPONENT ||
1089 lookup_ctx->lookup_name_found)
1090 return;
1091
1092 lookup_ctx->lookup_name_found =
1093 !strcmp(lookup_ctx->lookup_name, version_name);
1094}
1095
1096static int devlink_flash_component_get(struct devlink *devlink,
1097 struct nlattr *nla_component,
1098 const char **p_component,
1099 struct netlink_ext_ack *extack)
1100{
1101 struct devlink_flash_component_lookup_ctx lookup_ctx = {};
1102 struct devlink_info_req req = {};
1103 const char *component;
1104 int ret;
1105
1106 if (!nla_component)
1107 return 0;
1108
1109 component = nla_data(nla_component);
1110
1111 if (!devlink->ops->info_get) {
1112 NL_SET_ERR_MSG_ATTR(extack, nla_component,
1113 "component update is not supported by this device");
1114 return -EOPNOTSUPP;
1115 }
1116
1117 lookup_ctx.lookup_name = component;
1118 req.version_cb = devlink_flash_component_lookup_cb;
1119 req.version_cb_priv = &lookup_ctx;
1120
1121 ret = devlink->ops->info_get(devlink, &req, NULL);
1122 if (ret)
1123 return ret;
1124
1125 if (!lookup_ctx.lookup_name_found) {
1126 NL_SET_ERR_MSG_ATTR(extack, nla_component,
1127 "selected component is not supported by this device");
1128 return -EINVAL;
1129 }
1130 *p_component = component;
1131 return 0;
1132}
1133
1134int devlink_nl_flash_update_doit(struct sk_buff *skb, struct genl_info *info)
1135{
1136 struct nlattr *nla_overwrite_mask, *nla_file_name;
1137 struct devlink_flash_update_params params = {};
1138 struct devlink *devlink = info->user_ptr[0];
1139 const char *file_name;
1140 u32 supported_params;
1141 int ret;
1142
1143 if (!devlink->ops->flash_update)
1144 return -EOPNOTSUPP;
1145
1146 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME))
1147 return -EINVAL;
1148
1149 ret = devlink_flash_component_get(devlink,
1150 info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT],
1151 &params.component, info->extack);
1152 if (ret)
1153 return ret;
1154
1155 supported_params = devlink->ops->supported_flash_update_params;
1156
1157 nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK];
1158 if (nla_overwrite_mask) {
1159 struct nla_bitfield32 sections;
1160
1161 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) {
1162 NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask,
1163 "overwrite settings are not supported by this device");
1164 return -EOPNOTSUPP;
1165 }
1166 sections = nla_get_bitfield32(nla_overwrite_mask);
1167 params.overwrite_mask = sections.value & sections.selector;
1168 }
1169
1170 nla_file_name = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME];
1171 file_name = nla_data(nla_file_name);
1172 ret = request_firmware(&params.fw, file_name, devlink->dev);
1173 if (ret) {
1174 NL_SET_ERR_MSG_ATTR(info->extack, nla_file_name,
1175 "failed to locate the requested firmware file");
1176 return ret;
1177 }
1178
1179 devlink_flash_update_begin_notify(devlink);
1180 ret = devlink->ops->flash_update(devlink, &params, info->extack);
1181 devlink_flash_update_end_notify(devlink);
1182
1183 release_firmware(params.fw);
1184
1185 return ret;
1186}
1187
1188static void __devlink_compat_running_version(struct devlink *devlink,
1189 char *buf, size_t len)
1190{
1191 struct devlink_info_req req = {};
1192 const struct nlattr *nlattr;
1193 struct sk_buff *msg;
1194 int rem, err;
1195
1196 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1197 if (!msg)
1198 return;
1199
1200 req.msg = msg;
1201 err = devlink->ops->info_get(devlink, &req, NULL);
1202 if (err)
1203 goto free_msg;
1204
1205 nla_for_each_attr_type(nlattr, DEVLINK_ATTR_INFO_VERSION_RUNNING,
1206 (void *)msg->data, msg->len, rem) {
1207 const struct nlattr *kv;
1208 int rem_kv;
1209
1210 nla_for_each_nested_type(kv, DEVLINK_ATTR_INFO_VERSION_VALUE,
1211 nlattr, rem_kv) {
1212 strlcat(buf, nla_data(kv), len);
1213 strlcat(buf, " ", len);
1214 }
1215 }
1216free_msg:
1217 nlmsg_consume(msg);
1218}
1219
1220void devlink_compat_running_version(struct devlink *devlink,
1221 char *buf, size_t len)
1222{
1223 if (!devlink->ops->info_get)
1224 return;
1225
1226 devl_lock(devlink);
1227 if (devl_is_registered(devlink))
1228 __devlink_compat_running_version(devlink, buf, len);
1229 devl_unlock(devlink);
1230}
1231
1232int devlink_compat_flash_update(struct devlink *devlink, const char *file_name)
1233{
1234 struct devlink_flash_update_params params = {};
1235 int ret;
1236
1237 devl_lock(devlink);
1238 if (!devl_is_registered(devlink)) {
1239 ret = -ENODEV;
1240 goto out_unlock;
1241 }
1242
1243 if (!devlink->ops->flash_update) {
1244 ret = -EOPNOTSUPP;
1245 goto out_unlock;
1246 }
1247
1248 ret = request_firmware(&params.fw, file_name, devlink->dev);
1249 if (ret)
1250 goto out_unlock;
1251
1252 devlink_flash_update_begin_notify(devlink);
1253 ret = devlink->ops->flash_update(devlink, &params, NULL);
1254 devlink_flash_update_end_notify(devlink);
1255
1256 release_firmware(params.fw);
1257out_unlock:
1258 devl_unlock(devlink);
1259
1260 return ret;
1261}
1262
1263static int
1264devlink_nl_selftests_fill(struct sk_buff *msg, struct devlink *devlink,
1265 u32 portid, u32 seq, int flags,
1266 struct netlink_ext_ack *extack)
1267{
1268 struct nlattr *selftests;
1269 void *hdr;
1270 int err;
1271 int i;
1272
1273 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags,
1274 DEVLINK_CMD_SELFTESTS_GET);
1275 if (!hdr)
1276 return -EMSGSIZE;
1277
1278 err = -EMSGSIZE;
1279 if (devlink_nl_put_handle(msg, devlink))
1280 goto err_cancel_msg;
1281
1282 selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
1283 if (!selftests)
1284 goto err_cancel_msg;
1285
1286 for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
1287 i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
1288 if (devlink->ops->selftest_check(devlink, i, extack)) {
1289 err = nla_put_flag(msg, i);
1290 if (err)
1291 goto err_cancel_msg;
1292 }
1293 }
1294
1295 nla_nest_end(msg, selftests);
1296 genlmsg_end(msg, hdr);
1297 return 0;
1298
1299err_cancel_msg:
1300 genlmsg_cancel(msg, hdr);
1301 return err;
1302}
1303
1304int devlink_nl_selftests_get_doit(struct sk_buff *skb, struct genl_info *info)
1305{
1306 struct devlink *devlink = info->user_ptr[0];
1307 struct sk_buff *msg;
1308 int err;
1309
1310 if (!devlink->ops->selftest_check)
1311 return -EOPNOTSUPP;
1312
1313 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1314 if (!msg)
1315 return -ENOMEM;
1316
1317 err = devlink_nl_selftests_fill(msg, devlink, info->snd_portid,
1318 info->snd_seq, 0, info->extack);
1319 if (err) {
1320 nlmsg_free(msg);
1321 return err;
1322 }
1323
1324 return genlmsg_reply(msg, info);
1325}
1326
1327static int devlink_nl_selftests_get_dump_one(struct sk_buff *msg,
1328 struct devlink *devlink,
1329 struct netlink_callback *cb,
1330 int flags)
1331{
1332 if (!devlink->ops->selftest_check)
1333 return 0;
1334
1335 return devlink_nl_selftests_fill(msg, devlink,
1336 NETLINK_CB(cb->skb).portid,
1337 cb->nlh->nlmsg_seq, flags,
1338 cb->extack);
1339}
1340
1341int devlink_nl_selftests_get_dumpit(struct sk_buff *skb,
1342 struct netlink_callback *cb)
1343{
1344 return devlink_nl_dumpit(skb, cb, devlink_nl_selftests_get_dump_one);
1345}
1346
1347static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id,
1348 enum devlink_selftest_status test_status)
1349{
1350 struct nlattr *result_attr;
1351
1352 result_attr = nla_nest_start(skb, DEVLINK_ATTR_SELFTEST_RESULT);
1353 if (!result_attr)
1354 return -EMSGSIZE;
1355
1356 if (nla_put_u32(skb, DEVLINK_ATTR_SELFTEST_RESULT_ID, id) ||
1357 nla_put_u8(skb, DEVLINK_ATTR_SELFTEST_RESULT_STATUS,
1358 test_status))
1359 goto nla_put_failure;
1360
1361 nla_nest_end(skb, result_attr);
1362 return 0;
1363
1364nla_put_failure:
1365 nla_nest_cancel(skb, result_attr);
1366 return -EMSGSIZE;
1367}
1368
1369static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_ATTR_SELFTEST_ID_MAX + 1] = {
1370 [DEVLINK_ATTR_SELFTEST_ID_FLASH] = { .type = NLA_FLAG },
1371};
1372
1373int devlink_nl_selftests_run_doit(struct sk_buff *skb, struct genl_info *info)
1374{
1375 struct nlattr *tb[DEVLINK_ATTR_SELFTEST_ID_MAX + 1];
1376 struct devlink *devlink = info->user_ptr[0];
1377 struct nlattr *attrs, *selftests;
1378 struct sk_buff *msg;
1379 void *hdr;
1380 int err;
1381 int i;
1382
1383 if (!devlink->ops->selftest_run || !devlink->ops->selftest_check)
1384 return -EOPNOTSUPP;
1385
1386 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SELFTESTS))
1387 return -EINVAL;
1388
1389 attrs = info->attrs[DEVLINK_ATTR_SELFTESTS];
1390
1391 err = nla_parse_nested(tb, DEVLINK_ATTR_SELFTEST_ID_MAX, attrs,
1392 devlink_selftest_nl_policy, info->extack);
1393 if (err < 0)
1394 return err;
1395
1396 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1397 if (!msg)
1398 return -ENOMEM;
1399
1400 err = -EMSGSIZE;
1401 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1402 &devlink_nl_family, 0, DEVLINK_CMD_SELFTESTS_RUN);
1403 if (!hdr)
1404 goto free_msg;
1405
1406 if (devlink_nl_put_handle(msg, devlink))
1407 goto genlmsg_cancel;
1408
1409 selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
1410 if (!selftests)
1411 goto genlmsg_cancel;
1412
1413 for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
1414 i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
1415 enum devlink_selftest_status test_status;
1416
1417 if (nla_get_flag(tb[i])) {
1418 if (!devlink->ops->selftest_check(devlink, i,
1419 info->extack)) {
1420 if (devlink_selftest_result_put(msg, i,
1421 DEVLINK_SELFTEST_STATUS_SKIP))
1422 goto selftests_nest_cancel;
1423 continue;
1424 }
1425
1426 test_status = devlink->ops->selftest_run(devlink, i,
1427 info->extack);
1428 if (devlink_selftest_result_put(msg, i, test_status))
1429 goto selftests_nest_cancel;
1430 }
1431 }
1432
1433 nla_nest_end(msg, selftests);
1434 genlmsg_end(msg, hdr);
1435 return genlmsg_reply(msg, info);
1436
1437selftests_nest_cancel:
1438 nla_nest_cancel(msg, selftests);
1439genlmsg_cancel:
1440 genlmsg_cancel(msg, hdr);
1441free_msg:
1442 nlmsg_free(msg);
1443 return err;
1444}