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 <jiri@mellanox.com>
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(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_STATS_ENTRY);
64 if (!reload_stats_entry)
65 return -EMSGSIZE;
66
67 if (nla_put_u8(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_STATS_LIMIT, value: limit) ||
68 nla_put_u32(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_STATS_VALUE, value))
69 goto nla_put_failure;
70 nla_nest_end(skb: msg, start: reload_stats_entry);
71 return 0;
72
73nla_put_failure:
74 nla_nest_cancel(skb: msg, start: 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(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_STATS);
87 else
88 reload_stats_attr = nla_nest_start(skb: msg, attrtype: 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, action: i)) ||
96 i == DEVLINK_RELOAD_ACTION_UNSPEC)
97 continue;
98 act_info = nla_nest_start(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_ACTION_INFO);
99 if (!act_info)
100 goto nla_put_failure;
101
102 if (nla_put_u8(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_ACTION, value: i))
103 goto action_info_nest_cancel;
104 act_stats = nla_nest_start(skb: msg, attrtype: 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, limit: j)) ||
116 devlink_reload_combination_is_invalid(action: i, limit: 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, limit: j, value))
125 goto action_stats_nest_cancel;
126 }
127 nla_nest_end(skb: msg, start: act_stats);
128 nla_nest_end(skb: msg, start: act_info);
129 }
130 nla_nest_end(skb: msg, start: reload_stats_attr);
131 return 0;
132
133action_stats_nest_cancel:
134 nla_nest_cancel(skb: msg, start: act_stats);
135action_info_nest_cancel:
136 nla_nest_cancel(skb: msg, start: act_info);
137nla_put_failure:
138 nla_nest_cancel(skb: msg, start: 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 attrtype: 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(skb: msg, portid, seq, family: &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(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_FAILED, value: devlink->reload_failed))
173 goto nla_put_failure;
174
175 dev_stats = nla_nest_start(skb: msg, attrtype: DEVLINK_ATTR_DEV_STATS);
176 if (!dev_stats)
177 goto nla_put_failure;
178
179 if (devlink_reload_stats_put(msg, devlink, is_remote: false))
180 goto dev_stats_nest_cancel;
181 if (devlink_reload_stats_put(msg, devlink, is_remote: true))
182 goto dev_stats_nest_cancel;
183
184 nla_nest_end(skb: msg, start: dev_stats);
185
186 if (devlink_nl_nested_fill(msg, devlink))
187 goto nla_put_failure;
188
189 genlmsg_end(skb: msg, hdr);
190 return 0;
191
192dev_stats_nest_cancel:
193 nla_nest_cancel(skb: msg, start: dev_stats);
194nla_put_failure:
195 genlmsg_cancel(skb: 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, portid: 0, seq: 0, flags: 0);
215 if (err) {
216 nlmsg_free(skb: 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, cmd: DEVLINK_CMD_NEW,
234 portid: info->snd_portid, seq: info->snd_seq, flags: 0);
235 if (err) {
236 nlmsg_free(skb: msg);
237 return err;
238 }
239
240 return genlmsg_reply(skb: 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, cmd: DEVLINK_CMD_NEW,
248 NETLINK_CB(cb->skb).portid,
249 seq: 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, dump_one: devlink_nl_get_dump_one);
255}
256
257static void devlink_rel_notify_cb(struct devlink *devlink, u32 obj_index)
258{
259 devlink_notify(devlink, cmd: 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, index: 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: &rel_index, devlink_index: devlink->index, obj_index: 0,
275 notify_cb: devlink_rel_notify_cb,
276 cleanup_cb: devlink_rel_cleanup_cb,
277 devlink: nested_devlink);
278 if (err)
279 return err;
280 return xa_insert(xa: &devlink->nested_rels, index: rel_index,
281 entry: xa_mk_value(v: 0), GFP_KERNEL);
282}
283EXPORT_SYMBOL_GPL(devl_nested_devlink_set);
284
285void devlink_notify_register(struct devlink *devlink)
286{
287 devlink_notify(devlink, cmd: 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, cmd: 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, cmd: 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, cmd: 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, reload_stats: 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, reload_stats: 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(error: -EINVAL);
389 }
390
391 if (netns_pid_attr) {
392 net = get_net_ns_by_pid(pid: nla_get_u32(nla: netns_pid_attr));
393 } else if (netns_fd_attr) {
394 net = get_net_ns_by_fd(fd: nla_get_u32(nla: netns_fd_attr));
395 } else if (netns_id_attr) {
396 net = get_net_ns_by_id(net: sock_net(sk: skb->sk),
397 id: nla_get_u32(nla: netns_id_attr));
398 if (!net)
399 net = ERR_PTR(error: -EINVAL);
400 } else {
401 WARN_ON(1);
402 net = ERR_PTR(error: -EINVAL);
403 }
404 if (IS_ERR(ptr: net)) {
405 NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
406 return ERR_PTR(error: -EINVAL);
407 }
408 if (!netlink_ns_capable(skb, ns: net->user_ns, CAP_NET_ADMIN)) {
409 put_net(net);
410 return ERR_PTR(error: -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(pnet: &devlink->_net, 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(!list_empty(&devlink->rate_list));
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 device_lock_assert(dev: devlink->dev);
457
458 memcpy(remote_reload_stats, devlink->stats.remote_reload_stats,
459 sizeof(remote_reload_stats));
460
461 err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
462 if (err)
463 return err;
464
465 curr_net = devlink_net(devlink);
466 if (dest_net && !net_eq(net1: dest_net, net2: curr_net))
467 devlink_reload_netns_change(devlink, curr_net, dest_net);
468
469 if (action == DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
470 devlink_params_driverinit_load_new(devlink);
471 devlink_reload_reinit_sanity_check(devlink);
472 }
473
474 err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack);
475 devlink_reload_failed_set(devlink, reload_failed: !!err);
476 if (err)
477 return err;
478
479 WARN_ON(!(*actions_performed & BIT(action)));
480 /* Catch driver on updating the remote action within devlink reload */
481 WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats,
482 sizeof(remote_reload_stats)));
483 devlink_reload_stats_update(devlink, limit, actions_performed: *actions_performed);
484 return 0;
485}
486
487static int
488devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed,
489 enum devlink_command cmd, struct genl_info *info)
490{
491 struct sk_buff *msg;
492 void *hdr;
493
494 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
495 if (!msg)
496 return -ENOMEM;
497
498 hdr = genlmsg_put(skb: msg, portid: info->snd_portid, seq: info->snd_seq, family: &devlink_nl_family, flags: 0, cmd);
499 if (!hdr)
500 goto free_msg;
501
502 if (devlink_nl_put_handle(msg, devlink))
503 goto nla_put_failure;
504
505 if (nla_put_bitfield32(skb: msg, attrtype: DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, value: actions_performed,
506 selector: actions_performed))
507 goto nla_put_failure;
508 genlmsg_end(skb: msg, hdr);
509
510 return genlmsg_reply(skb: msg, info);
511
512nla_put_failure:
513 genlmsg_cancel(skb: msg, hdr);
514free_msg:
515 nlmsg_free(skb: msg);
516 return -EMSGSIZE;
517}
518
519int devlink_nl_reload_doit(struct sk_buff *skb, struct genl_info *info)
520{
521 struct devlink *devlink = info->user_ptr[0];
522 enum devlink_reload_action action;
523 enum devlink_reload_limit limit;
524 struct net *dest_net = NULL;
525 u32 actions_performed;
526 int err;
527
528 err = devlink_resources_validate(devlink, NULL, info);
529 if (err) {
530 NL_SET_ERR_MSG(info->extack, "resources size validation failed");
531 return err;
532 }
533
534 action = nla_get_u8_default(nla: info->attrs[DEVLINK_ATTR_RELOAD_ACTION],
535 defvalue: DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
536
537 if (!devlink_reload_action_is_supported(devlink, action)) {
538 NL_SET_ERR_MSG(info->extack, "Requested reload action is not supported by the driver");
539 return -EOPNOTSUPP;
540 }
541
542 limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
543 if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
544 struct nla_bitfield32 limits;
545 u32 limits_selected;
546
547 limits = nla_get_bitfield32(nla: info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
548 limits_selected = limits.value & limits.selector;
549 if (!limits_selected) {
550 NL_SET_ERR_MSG(info->extack, "Invalid limit selected");
551 return -EINVAL;
552 }
553 for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
554 if (limits_selected & BIT(limit))
555 break;
556 /* UAPI enables multiselection, but currently it is not used */
557 if (limits_selected != BIT(limit)) {
558 NL_SET_ERR_MSG(info->extack, "Multiselection of limit is not supported");
559 return -EOPNOTSUPP;
560 }
561 if (!devlink_reload_limit_is_supported(devlink, limit)) {
562 NL_SET_ERR_MSG(info->extack, "Requested limit is not supported by the driver");
563 return -EOPNOTSUPP;
564 }
565 if (devlink_reload_combination_is_invalid(action, limit)) {
566 NL_SET_ERR_MSG(info->extack, "Requested limit is invalid for this action");
567 return -EINVAL;
568 }
569 }
570 if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
571 info->attrs[DEVLINK_ATTR_NETNS_FD] ||
572 info->attrs[DEVLINK_ATTR_NETNS_ID]) {
573 dest_net = devlink_netns_get(skb, info);
574 if (IS_ERR(ptr: dest_net))
575 return PTR_ERR(ptr: dest_net);
576 if (!net_eq(net1: dest_net, net2: devlink_net(devlink)) &&
577 action != DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
578 NL_SET_ERR_MSG_MOD(info->extack,
579 "Changing namespace is only supported for reinit action");
580 return -EOPNOTSUPP;
581 }
582 }
583
584 err = devlink_reload(devlink, dest_net, action, limit, actions_performed: &actions_performed, extack: info->extack);
585
586 if (dest_net)
587 put_net(net: dest_net);
588
589 if (err)
590 return err;
591 /* For backward compatibility generate reply only if attributes used by user */
592 if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
593 return 0;
594
595 return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
596 cmd: DEVLINK_CMD_RELOAD, info);
597}
598
599bool devlink_reload_actions_valid(const struct devlink_ops *ops)
600{
601 const struct devlink_reload_combination *comb;
602 int i;
603
604 if (!devlink_reload_supported(ops)) {
605 if (WARN_ON(ops->reload_actions))
606 return false;
607 return true;
608 }
609
610 if (WARN_ON(!ops->reload_actions ||
611 ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
612 ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
613 return false;
614
615 if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
616 ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
617 return false;
618
619 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) {
620 comb = &devlink_reload_invalid_combinations[i];
621 if (ops->reload_actions == BIT(comb->action) &&
622 ops->reload_limits == BIT(comb->limit))
623 return false;
624 }
625 return true;
626}
627
628static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
629 enum devlink_command cmd, u32 portid,
630 u32 seq, int flags)
631{
632 const struct devlink_ops *ops = devlink->ops;
633 enum devlink_eswitch_encap_mode encap_mode;
634 u8 inline_mode;
635 void *hdr;
636 int err = 0;
637 u16 mode;
638
639 hdr = genlmsg_put(skb: msg, portid, seq, family: &devlink_nl_family, flags, cmd);
640 if (!hdr)
641 return -EMSGSIZE;
642
643 err = devlink_nl_put_handle(msg, devlink);
644 if (err)
645 goto nla_put_failure;
646
647 if (ops->eswitch_mode_get) {
648 err = ops->eswitch_mode_get(devlink, &mode);
649 if (err)
650 goto nla_put_failure;
651 err = nla_put_u16(skb: msg, attrtype: DEVLINK_ATTR_ESWITCH_MODE, value: mode);
652 if (err)
653 goto nla_put_failure;
654 }
655
656 if (ops->eswitch_inline_mode_get) {
657 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
658 if (err)
659 goto nla_put_failure;
660 err = nla_put_u8(skb: msg, attrtype: DEVLINK_ATTR_ESWITCH_INLINE_MODE,
661 value: inline_mode);
662 if (err)
663 goto nla_put_failure;
664 }
665
666 if (ops->eswitch_encap_mode_get) {
667 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
668 if (err)
669 goto nla_put_failure;
670 err = nla_put_u8(skb: msg, attrtype: DEVLINK_ATTR_ESWITCH_ENCAP_MODE, value: encap_mode);
671 if (err)
672 goto nla_put_failure;
673 }
674
675 genlmsg_end(skb: msg, hdr);
676 return 0;
677
678nla_put_failure:
679 genlmsg_cancel(skb: msg, hdr);
680 return err;
681}
682
683int devlink_nl_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info)
684{
685 struct devlink *devlink = info->user_ptr[0];
686 struct sk_buff *msg;
687 int err;
688
689 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
690 if (!msg)
691 return -ENOMEM;
692
693 err = devlink_nl_eswitch_fill(msg, devlink, cmd: DEVLINK_CMD_ESWITCH_GET,
694 portid: info->snd_portid, seq: info->snd_seq, flags: 0);
695
696 if (err) {
697 nlmsg_free(skb: msg);
698 return err;
699 }
700
701 return genlmsg_reply(skb: msg, info);
702}
703
704int devlink_nl_eswitch_set_doit(struct sk_buff *skb, struct genl_info *info)
705{
706 struct devlink *devlink = info->user_ptr[0];
707 const struct devlink_ops *ops = devlink->ops;
708 enum devlink_eswitch_encap_mode encap_mode;
709 u8 inline_mode;
710 int err = 0;
711 u16 mode;
712
713 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
714 if (!ops->eswitch_mode_set)
715 return -EOPNOTSUPP;
716 mode = nla_get_u16(nla: info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
717 err = devlink_rate_nodes_check(devlink, mode, extack: info->extack);
718 if (err)
719 return err;
720 err = ops->eswitch_mode_set(devlink, mode, info->extack);
721 if (err)
722 return err;
723 }
724
725 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
726 if (!ops->eswitch_inline_mode_set)
727 return -EOPNOTSUPP;
728 inline_mode = nla_get_u8(nla: info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
729 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
730 info->extack);
731 if (err)
732 return err;
733 }
734
735 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
736 if (!ops->eswitch_encap_mode_set)
737 return -EOPNOTSUPP;
738 encap_mode = nla_get_u8(nla: info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
739 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
740 info->extack);
741 if (err)
742 return err;
743 }
744
745 return 0;
746}
747
748int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
749{
750 if (!req->msg)
751 return 0;
752 return nla_put_string(skb: req->msg, attrtype: DEVLINK_ATTR_INFO_SERIAL_NUMBER, str: sn);
753}
754EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
755
756int devlink_info_board_serial_number_put(struct devlink_info_req *req,
757 const char *bsn)
758{
759 if (!req->msg)
760 return 0;
761 return nla_put_string(skb: req->msg, attrtype: DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER,
762 str: bsn);
763}
764EXPORT_SYMBOL_GPL(devlink_info_board_serial_number_put);
765
766static int devlink_info_version_put(struct devlink_info_req *req, int attr,
767 const char *version_name,
768 const char *version_value,
769 enum devlink_info_version_type version_type)
770{
771 struct nlattr *nest;
772 int err;
773
774 if (req->version_cb)
775 req->version_cb(version_name, version_type,
776 req->version_cb_priv);
777
778 if (!req->msg || !*version_value)
779 return 0;
780
781 nest = nla_nest_start_noflag(skb: req->msg, attrtype: attr);
782 if (!nest)
783 return -EMSGSIZE;
784
785 err = nla_put_string(skb: req->msg, attrtype: DEVLINK_ATTR_INFO_VERSION_NAME,
786 str: version_name);
787 if (err)
788 goto nla_put_failure;
789
790 err = nla_put_string(skb: req->msg, attrtype: DEVLINK_ATTR_INFO_VERSION_VALUE,
791 str: version_value);
792 if (err)
793 goto nla_put_failure;
794
795 nla_nest_end(skb: req->msg, start: nest);
796
797 return 0;
798
799nla_put_failure:
800 nla_nest_cancel(skb: req->msg, start: nest);
801 return err;
802}
803
804int devlink_info_version_fixed_put(struct devlink_info_req *req,
805 const char *version_name,
806 const char *version_value)
807{
808 return devlink_info_version_put(req, attr: DEVLINK_ATTR_INFO_VERSION_FIXED,
809 version_name, version_value,
810 version_type: DEVLINK_INFO_VERSION_TYPE_NONE);
811}
812EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
813
814int devlink_info_version_stored_put(struct devlink_info_req *req,
815 const char *version_name,
816 const char *version_value)
817{
818 return devlink_info_version_put(req, attr: DEVLINK_ATTR_INFO_VERSION_STORED,
819 version_name, version_value,
820 version_type: DEVLINK_INFO_VERSION_TYPE_NONE);
821}
822EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
823
824int devlink_info_version_stored_put_ext(struct devlink_info_req *req,
825 const char *version_name,
826 const char *version_value,
827 enum devlink_info_version_type version_type)
828{
829 return devlink_info_version_put(req, attr: DEVLINK_ATTR_INFO_VERSION_STORED,
830 version_name, version_value,
831 version_type);
832}
833EXPORT_SYMBOL_GPL(devlink_info_version_stored_put_ext);
834
835int devlink_info_version_running_put(struct devlink_info_req *req,
836 const char *version_name,
837 const char *version_value)
838{
839 return devlink_info_version_put(req, attr: DEVLINK_ATTR_INFO_VERSION_RUNNING,
840 version_name, version_value,
841 version_type: DEVLINK_INFO_VERSION_TYPE_NONE);
842}
843EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
844
845int devlink_info_version_running_put_ext(struct devlink_info_req *req,
846 const char *version_name,
847 const char *version_value,
848 enum devlink_info_version_type version_type)
849{
850 return devlink_info_version_put(req, attr: DEVLINK_ATTR_INFO_VERSION_RUNNING,
851 version_name, version_value,
852 version_type);
853}
854EXPORT_SYMBOL_GPL(devlink_info_version_running_put_ext);
855
856static int devlink_nl_driver_info_get(struct device_driver *drv,
857 struct devlink_info_req *req)
858{
859 if (!drv)
860 return 0;
861
862 if (drv->name[0])
863 return nla_put_string(skb: req->msg, attrtype: DEVLINK_ATTR_INFO_DRIVER_NAME,
864 str: drv->name);
865
866 return 0;
867}
868
869static int
870devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
871 enum devlink_command cmd, u32 portid,
872 u32 seq, int flags, struct netlink_ext_ack *extack)
873{
874 struct device *dev = devlink_to_dev(devlink);
875 struct devlink_info_req req = {};
876 void *hdr;
877 int err;
878
879 hdr = genlmsg_put(skb: msg, portid, seq, family: &devlink_nl_family, flags, cmd);
880 if (!hdr)
881 return -EMSGSIZE;
882
883 err = -EMSGSIZE;
884 if (devlink_nl_put_handle(msg, devlink))
885 goto err_cancel_msg;
886
887 req.msg = msg;
888 if (devlink->ops->info_get) {
889 err = devlink->ops->info_get(devlink, &req, extack);
890 if (err)
891 goto err_cancel_msg;
892 }
893
894 err = devlink_nl_driver_info_get(drv: dev->driver, req: &req);
895 if (err)
896 goto err_cancel_msg;
897
898 genlmsg_end(skb: msg, hdr);
899 return 0;
900
901err_cancel_msg:
902 genlmsg_cancel(skb: msg, hdr);
903 return err;
904}
905
906int devlink_nl_info_get_doit(struct sk_buff *skb, struct genl_info *info)
907{
908 struct devlink *devlink = info->user_ptr[0];
909 struct sk_buff *msg;
910 int err;
911
912 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
913 if (!msg)
914 return -ENOMEM;
915
916 err = devlink_nl_info_fill(msg, devlink, cmd: DEVLINK_CMD_INFO_GET,
917 portid: info->snd_portid, seq: info->snd_seq, flags: 0,
918 extack: info->extack);
919 if (err) {
920 nlmsg_free(skb: msg);
921 return err;
922 }
923
924 return genlmsg_reply(skb: msg, info);
925}
926
927static int
928devlink_nl_info_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
929 struct netlink_callback *cb, int flags)
930{
931 int err;
932
933 err = devlink_nl_info_fill(msg, devlink, cmd: DEVLINK_CMD_INFO_GET,
934 NETLINK_CB(cb->skb).portid,
935 seq: cb->nlh->nlmsg_seq, flags,
936 extack: cb->extack);
937 if (err == -EOPNOTSUPP)
938 err = 0;
939 return err;
940}
941
942int devlink_nl_info_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb)
943{
944 return devlink_nl_dumpit(msg, cb, dump_one: devlink_nl_info_get_dump_one);
945}
946
947static int devlink_nl_flash_update_fill(struct sk_buff *msg,
948 struct devlink *devlink,
949 enum devlink_command cmd,
950 struct devlink_flash_notify *params)
951{
952 void *hdr;
953
954 hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &devlink_nl_family, flags: 0, cmd);
955 if (!hdr)
956 return -EMSGSIZE;
957
958 if (devlink_nl_put_handle(msg, devlink))
959 goto nla_put_failure;
960
961 if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
962 goto out;
963
964 if (params->status_msg &&
965 nla_put_string(skb: msg, attrtype: DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
966 str: params->status_msg))
967 goto nla_put_failure;
968 if (params->component &&
969 nla_put_string(skb: msg, attrtype: DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
970 str: params->component))
971 goto nla_put_failure;
972 if (devlink_nl_put_u64(msg, attrtype: DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
973 val: params->done))
974 goto nla_put_failure;
975 if (devlink_nl_put_u64(msg, attrtype: DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
976 val: params->total))
977 goto nla_put_failure;
978 if (devlink_nl_put_u64(msg, attrtype: DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,
979 val: params->timeout))
980 goto nla_put_failure;
981
982out:
983 genlmsg_end(skb: msg, hdr);
984 return 0;
985
986nla_put_failure:
987 genlmsg_cancel(skb: msg, hdr);
988 return -EMSGSIZE;
989}
990
991static void __devlink_flash_update_notify(struct devlink *devlink,
992 enum devlink_command cmd,
993 struct devlink_flash_notify *params)
994{
995 struct sk_buff *msg;
996 int err;
997
998 WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
999 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
1000 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
1001
1002 if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
1003 return;
1004
1005 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1006 if (!msg)
1007 return;
1008
1009 err = devlink_nl_flash_update_fill(msg, devlink, cmd, params);
1010 if (err)
1011 goto out_free_msg;
1012
1013 devlink_nl_notify_send(devlink, msg);
1014 return;
1015
1016out_free_msg:
1017 nlmsg_free(skb: msg);
1018}
1019
1020static void devlink_flash_update_begin_notify(struct devlink *devlink)
1021{
1022 struct devlink_flash_notify params = {};
1023
1024 __devlink_flash_update_notify(devlink,
1025 cmd: DEVLINK_CMD_FLASH_UPDATE,
1026 params: &params);
1027}
1028
1029static void devlink_flash_update_end_notify(struct devlink *devlink)
1030{
1031 struct devlink_flash_notify params = {};
1032
1033 __devlink_flash_update_notify(devlink,
1034 cmd: DEVLINK_CMD_FLASH_UPDATE_END,
1035 params: &params);
1036}
1037
1038void devlink_flash_update_status_notify(struct devlink *devlink,
1039 const char *status_msg,
1040 const char *component,
1041 unsigned long done,
1042 unsigned long total)
1043{
1044 struct devlink_flash_notify params = {
1045 .status_msg = status_msg,
1046 .component = component,
1047 .done = done,
1048 .total = total,
1049 };
1050
1051 __devlink_flash_update_notify(devlink,
1052 cmd: DEVLINK_CMD_FLASH_UPDATE_STATUS,
1053 params: &params);
1054}
1055EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
1056
1057void devlink_flash_update_timeout_notify(struct devlink *devlink,
1058 const char *status_msg,
1059 const char *component,
1060 unsigned long timeout)
1061{
1062 struct devlink_flash_notify params = {
1063 .status_msg = status_msg,
1064 .component = component,
1065 .timeout = timeout,
1066 };
1067
1068 __devlink_flash_update_notify(devlink,
1069 cmd: DEVLINK_CMD_FLASH_UPDATE_STATUS,
1070 params: &params);
1071}
1072EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
1073
1074struct devlink_flash_component_lookup_ctx {
1075 const char *lookup_name;
1076 bool lookup_name_found;
1077};
1078
1079static void
1080devlink_flash_component_lookup_cb(const char *version_name,
1081 enum devlink_info_version_type version_type,
1082 void *version_cb_priv)
1083{
1084 struct devlink_flash_component_lookup_ctx *lookup_ctx = version_cb_priv;
1085
1086 if (version_type != DEVLINK_INFO_VERSION_TYPE_COMPONENT ||
1087 lookup_ctx->lookup_name_found)
1088 return;
1089
1090 lookup_ctx->lookup_name_found =
1091 !strcmp(lookup_ctx->lookup_name, version_name);
1092}
1093
1094static int devlink_flash_component_get(struct devlink *devlink,
1095 struct nlattr *nla_component,
1096 const char **p_component,
1097 struct netlink_ext_ack *extack)
1098{
1099 struct devlink_flash_component_lookup_ctx lookup_ctx = {};
1100 struct devlink_info_req req = {};
1101 const char *component;
1102 int ret;
1103
1104 if (!nla_component)
1105 return 0;
1106
1107 component = nla_data(nla: nla_component);
1108
1109 if (!devlink->ops->info_get) {
1110 NL_SET_ERR_MSG_ATTR(extack, nla_component,
1111 "component update is not supported by this device");
1112 return -EOPNOTSUPP;
1113 }
1114
1115 lookup_ctx.lookup_name = component;
1116 req.version_cb = devlink_flash_component_lookup_cb;
1117 req.version_cb_priv = &lookup_ctx;
1118
1119 ret = devlink->ops->info_get(devlink, &req, NULL);
1120 if (ret)
1121 return ret;
1122
1123 if (!lookup_ctx.lookup_name_found) {
1124 NL_SET_ERR_MSG_ATTR(extack, nla_component,
1125 "selected component is not supported by this device");
1126 return -EINVAL;
1127 }
1128 *p_component = component;
1129 return 0;
1130}
1131
1132int devlink_nl_flash_update_doit(struct sk_buff *skb, struct genl_info *info)
1133{
1134 struct nlattr *nla_overwrite_mask, *nla_file_name;
1135 struct devlink_flash_update_params params = {};
1136 struct devlink *devlink = info->user_ptr[0];
1137 const char *file_name;
1138 u32 supported_params;
1139 int ret;
1140
1141 if (!devlink->ops->flash_update)
1142 return -EOPNOTSUPP;
1143
1144 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME))
1145 return -EINVAL;
1146
1147 ret = devlink_flash_component_get(devlink,
1148 nla_component: info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT],
1149 p_component: &params.component, extack: info->extack);
1150 if (ret)
1151 return ret;
1152
1153 supported_params = devlink->ops->supported_flash_update_params;
1154
1155 nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK];
1156 if (nla_overwrite_mask) {
1157 struct nla_bitfield32 sections;
1158
1159 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) {
1160 NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask,
1161 "overwrite settings are not supported by this device");
1162 return -EOPNOTSUPP;
1163 }
1164 sections = nla_get_bitfield32(nla: nla_overwrite_mask);
1165 params.overwrite_mask = sections.value & sections.selector;
1166 }
1167
1168 nla_file_name = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME];
1169 file_name = nla_data(nla: nla_file_name);
1170 ret = request_firmware(fw: &params.fw, name: file_name, device: devlink->dev);
1171 if (ret) {
1172 NL_SET_ERR_MSG_ATTR(info->extack, nla_file_name,
1173 "failed to locate the requested firmware file");
1174 return ret;
1175 }
1176
1177 devlink_flash_update_begin_notify(devlink);
1178 ret = devlink->ops->flash_update(devlink, &params, info->extack);
1179 devlink_flash_update_end_notify(devlink);
1180
1181 release_firmware(fw: params.fw);
1182
1183 return ret;
1184}
1185
1186static void __devlink_compat_running_version(struct devlink *devlink,
1187 char *buf, size_t len)
1188{
1189 struct devlink_info_req req = {};
1190 const struct nlattr *nlattr;
1191 struct sk_buff *msg;
1192 int rem, err;
1193
1194 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1195 if (!msg)
1196 return;
1197
1198 req.msg = msg;
1199 err = devlink->ops->info_get(devlink, &req, NULL);
1200 if (err)
1201 goto free_msg;
1202
1203 nla_for_each_attr_type(nlattr, DEVLINK_ATTR_INFO_VERSION_RUNNING,
1204 (void *)msg->data, msg->len, rem) {
1205 const struct nlattr *kv;
1206 int rem_kv;
1207
1208 nla_for_each_nested_type(kv, DEVLINK_ATTR_INFO_VERSION_VALUE,
1209 nlattr, rem_kv) {
1210 strlcat(p: buf, q: nla_data(nla: kv), avail: len);
1211 strlcat(p: buf, q: " ", avail: len);
1212 }
1213 }
1214free_msg:
1215 nlmsg_consume(skb: msg);
1216}
1217
1218void devlink_compat_running_version(struct devlink *devlink,
1219 char *buf, size_t len)
1220{
1221 if (!devlink->ops->info_get)
1222 return;
1223
1224 devl_lock(devlink);
1225 if (devl_is_registered(devlink))
1226 __devlink_compat_running_version(devlink, buf, len);
1227 devl_unlock(devlink);
1228}
1229
1230int devlink_compat_flash_update(struct devlink *devlink, const char *file_name)
1231{
1232 struct devlink_flash_update_params params = {};
1233 int ret;
1234
1235 devl_lock(devlink);
1236 if (!devl_is_registered(devlink)) {
1237 ret = -ENODEV;
1238 goto out_unlock;
1239 }
1240
1241 if (!devlink->ops->flash_update) {
1242 ret = -EOPNOTSUPP;
1243 goto out_unlock;
1244 }
1245
1246 ret = request_firmware(fw: &params.fw, name: file_name, device: devlink->dev);
1247 if (ret)
1248 goto out_unlock;
1249
1250 devlink_flash_update_begin_notify(devlink);
1251 ret = devlink->ops->flash_update(devlink, &params, NULL);
1252 devlink_flash_update_end_notify(devlink);
1253
1254 release_firmware(fw: params.fw);
1255out_unlock:
1256 devl_unlock(devlink);
1257
1258 return ret;
1259}
1260
1261static int
1262devlink_nl_selftests_fill(struct sk_buff *msg, struct devlink *devlink,
1263 u32 portid, u32 seq, int flags,
1264 struct netlink_ext_ack *extack)
1265{
1266 struct nlattr *selftests;
1267 void *hdr;
1268 int err;
1269 int i;
1270
1271 hdr = genlmsg_put(skb: msg, portid, seq, family: &devlink_nl_family, flags,
1272 cmd: DEVLINK_CMD_SELFTESTS_GET);
1273 if (!hdr)
1274 return -EMSGSIZE;
1275
1276 err = -EMSGSIZE;
1277 if (devlink_nl_put_handle(msg, devlink))
1278 goto err_cancel_msg;
1279
1280 selftests = nla_nest_start(skb: msg, attrtype: DEVLINK_ATTR_SELFTESTS);
1281 if (!selftests)
1282 goto err_cancel_msg;
1283
1284 for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
1285 i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
1286 if (devlink->ops->selftest_check(devlink, i, extack)) {
1287 err = nla_put_flag(skb: msg, attrtype: i);
1288 if (err)
1289 goto err_cancel_msg;
1290 }
1291 }
1292
1293 nla_nest_end(skb: msg, start: selftests);
1294 genlmsg_end(skb: msg, hdr);
1295 return 0;
1296
1297err_cancel_msg:
1298 genlmsg_cancel(skb: msg, hdr);
1299 return err;
1300}
1301
1302int devlink_nl_selftests_get_doit(struct sk_buff *skb, struct genl_info *info)
1303{
1304 struct devlink *devlink = info->user_ptr[0];
1305 struct sk_buff *msg;
1306 int err;
1307
1308 if (!devlink->ops->selftest_check)
1309 return -EOPNOTSUPP;
1310
1311 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1312 if (!msg)
1313 return -ENOMEM;
1314
1315 err = devlink_nl_selftests_fill(msg, devlink, portid: info->snd_portid,
1316 seq: info->snd_seq, flags: 0, extack: info->extack);
1317 if (err) {
1318 nlmsg_free(skb: msg);
1319 return err;
1320 }
1321
1322 return genlmsg_reply(skb: msg, info);
1323}
1324
1325static int devlink_nl_selftests_get_dump_one(struct sk_buff *msg,
1326 struct devlink *devlink,
1327 struct netlink_callback *cb,
1328 int flags)
1329{
1330 if (!devlink->ops->selftest_check)
1331 return 0;
1332
1333 return devlink_nl_selftests_fill(msg, devlink,
1334 NETLINK_CB(cb->skb).portid,
1335 seq: cb->nlh->nlmsg_seq, flags,
1336 extack: cb->extack);
1337}
1338
1339int devlink_nl_selftests_get_dumpit(struct sk_buff *skb,
1340 struct netlink_callback *cb)
1341{
1342 return devlink_nl_dumpit(msg: skb, cb, dump_one: devlink_nl_selftests_get_dump_one);
1343}
1344
1345static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id,
1346 enum devlink_selftest_status test_status)
1347{
1348 struct nlattr *result_attr;
1349
1350 result_attr = nla_nest_start(skb, attrtype: DEVLINK_ATTR_SELFTEST_RESULT);
1351 if (!result_attr)
1352 return -EMSGSIZE;
1353
1354 if (nla_put_u32(skb, attrtype: DEVLINK_ATTR_SELFTEST_RESULT_ID, value: id) ||
1355 nla_put_u8(skb, attrtype: DEVLINK_ATTR_SELFTEST_RESULT_STATUS,
1356 value: test_status))
1357 goto nla_put_failure;
1358
1359 nla_nest_end(skb, start: result_attr);
1360 return 0;
1361
1362nla_put_failure:
1363 nla_nest_cancel(skb, start: result_attr);
1364 return -EMSGSIZE;
1365}
1366
1367static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_ATTR_SELFTEST_ID_MAX + 1] = {
1368 [DEVLINK_ATTR_SELFTEST_ID_FLASH] = { .type = NLA_FLAG },
1369};
1370
1371int devlink_nl_selftests_run_doit(struct sk_buff *skb, struct genl_info *info)
1372{
1373 struct nlattr *tb[DEVLINK_ATTR_SELFTEST_ID_MAX + 1];
1374 struct devlink *devlink = info->user_ptr[0];
1375 struct nlattr *attrs, *selftests;
1376 struct sk_buff *msg;
1377 void *hdr;
1378 int err;
1379 int i;
1380
1381 if (!devlink->ops->selftest_run || !devlink->ops->selftest_check)
1382 return -EOPNOTSUPP;
1383
1384 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SELFTESTS))
1385 return -EINVAL;
1386
1387 attrs = info->attrs[DEVLINK_ATTR_SELFTESTS];
1388
1389 err = nla_parse_nested(tb, maxtype: DEVLINK_ATTR_SELFTEST_ID_MAX, nla: attrs,
1390 policy: devlink_selftest_nl_policy, extack: info->extack);
1391 if (err < 0)
1392 return err;
1393
1394 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1395 if (!msg)
1396 return -ENOMEM;
1397
1398 err = -EMSGSIZE;
1399 hdr = genlmsg_put(skb: msg, portid: info->snd_portid, seq: info->snd_seq,
1400 family: &devlink_nl_family, flags: 0, cmd: DEVLINK_CMD_SELFTESTS_RUN);
1401 if (!hdr)
1402 goto free_msg;
1403
1404 if (devlink_nl_put_handle(msg, devlink))
1405 goto genlmsg_cancel;
1406
1407 selftests = nla_nest_start(skb: msg, attrtype: DEVLINK_ATTR_SELFTESTS);
1408 if (!selftests)
1409 goto genlmsg_cancel;
1410
1411 for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
1412 i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
1413 enum devlink_selftest_status test_status;
1414
1415 if (nla_get_flag(nla: tb[i])) {
1416 if (!devlink->ops->selftest_check(devlink, i,
1417 info->extack)) {
1418 if (devlink_selftest_result_put(skb: msg, id: i,
1419 test_status: DEVLINK_SELFTEST_STATUS_SKIP))
1420 goto selftests_nest_cancel;
1421 continue;
1422 }
1423
1424 test_status = devlink->ops->selftest_run(devlink, i,
1425 info->extack);
1426 if (devlink_selftest_result_put(skb: msg, id: i, test_status))
1427 goto selftests_nest_cancel;
1428 }
1429 }
1430
1431 nla_nest_end(skb: msg, start: selftests);
1432 genlmsg_end(skb: msg, hdr);
1433 return genlmsg_reply(skb: msg, info);
1434
1435selftests_nest_cancel:
1436 nla_nest_cancel(skb: msg, start: selftests);
1437genlmsg_cancel:
1438 genlmsg_cancel(skb: msg, hdr);
1439free_msg:
1440 nlmsg_free(skb: msg);
1441 return err;
1442}
1443

source code of linux/net/devlink/dev.c