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[mirror_ubuntu-eoan-kernel.git] / net / core / devlink.c
1 /*
2 * net/core/devlink.c - Network physical/parent device Netlink interface
3 *
4 * Heavily inspired by net/wireless/
5 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
6 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/gfp.h>
19 #include <linux/device.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <rdma/ib_verbs.h>
23 #include <net/netlink.h>
24 #include <net/genetlink.h>
25 #include <net/rtnetlink.h>
26 #include <net/net_namespace.h>
27 #include <net/sock.h>
28 #include <net/devlink.h>
29 #define CREATE_TRACE_POINTS
30 #include <trace/events/devlink.h>
31
32 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
33 {
34 .name = "destination mac",
35 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
36 .bitwidth = 48,
37 },
38 };
39
40 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
41 .name = "ethernet",
42 .id = DEVLINK_DPIPE_HEADER_ETHERNET,
43 .fields = devlink_dpipe_fields_ethernet,
44 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
45 .global = true,
46 };
47 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
48
49 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
50 {
51 .name = "destination ip",
52 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
53 .bitwidth = 32,
54 },
55 };
56
57 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
58 .name = "ipv4",
59 .id = DEVLINK_DPIPE_HEADER_IPV4,
60 .fields = devlink_dpipe_fields_ipv4,
61 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
62 .global = true,
63 };
64 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
65
66 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
67 {
68 .name = "destination ip",
69 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
70 .bitwidth = 128,
71 },
72 };
73
74 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
75 .name = "ipv6",
76 .id = DEVLINK_DPIPE_HEADER_IPV6,
77 .fields = devlink_dpipe_fields_ipv6,
78 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
79 .global = true,
80 };
81 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
82
83 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
84 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
85
86 static LIST_HEAD(devlink_list);
87
88 /* devlink_mutex
89 *
90 * An overall lock guarding every operation coming from userspace.
91 * It also guards devlink devices list and it is taken when
92 * driver registers/unregisters it.
93 */
94 static DEFINE_MUTEX(devlink_mutex);
95
96 static struct net *devlink_net(const struct devlink *devlink)
97 {
98 return read_pnet(&devlink->_net);
99 }
100
101 static void devlink_net_set(struct devlink *devlink, struct net *net)
102 {
103 write_pnet(&devlink->_net, net);
104 }
105
106 static struct devlink *devlink_get_from_attrs(struct net *net,
107 struct nlattr **attrs)
108 {
109 struct devlink *devlink;
110 char *busname;
111 char *devname;
112
113 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
114 return ERR_PTR(-EINVAL);
115
116 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
117 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
118
119 lockdep_assert_held(&devlink_mutex);
120
121 list_for_each_entry(devlink, &devlink_list, list) {
122 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
123 strcmp(dev_name(devlink->dev), devname) == 0 &&
124 net_eq(devlink_net(devlink), net))
125 return devlink;
126 }
127
128 return ERR_PTR(-ENODEV);
129 }
130
131 static struct devlink *devlink_get_from_info(struct genl_info *info)
132 {
133 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
134 }
135
136 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
137 int port_index)
138 {
139 struct devlink_port *devlink_port;
140
141 list_for_each_entry(devlink_port, &devlink->port_list, list) {
142 if (devlink_port->index == port_index)
143 return devlink_port;
144 }
145 return NULL;
146 }
147
148 static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
149 {
150 return devlink_port_get_by_index(devlink, port_index);
151 }
152
153 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
154 struct nlattr **attrs)
155 {
156 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
157 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
158 struct devlink_port *devlink_port;
159
160 devlink_port = devlink_port_get_by_index(devlink, port_index);
161 if (!devlink_port)
162 return ERR_PTR(-ENODEV);
163 return devlink_port;
164 }
165 return ERR_PTR(-EINVAL);
166 }
167
168 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
169 struct genl_info *info)
170 {
171 return devlink_port_get_from_attrs(devlink, info->attrs);
172 }
173
174 struct devlink_sb {
175 struct list_head list;
176 unsigned int index;
177 u32 size;
178 u16 ingress_pools_count;
179 u16 egress_pools_count;
180 u16 ingress_tc_count;
181 u16 egress_tc_count;
182 };
183
184 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
185 {
186 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
187 }
188
189 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
190 unsigned int sb_index)
191 {
192 struct devlink_sb *devlink_sb;
193
194 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
195 if (devlink_sb->index == sb_index)
196 return devlink_sb;
197 }
198 return NULL;
199 }
200
201 static bool devlink_sb_index_exists(struct devlink *devlink,
202 unsigned int sb_index)
203 {
204 return devlink_sb_get_by_index(devlink, sb_index);
205 }
206
207 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
208 struct nlattr **attrs)
209 {
210 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
211 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
212 struct devlink_sb *devlink_sb;
213
214 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
215 if (!devlink_sb)
216 return ERR_PTR(-ENODEV);
217 return devlink_sb;
218 }
219 return ERR_PTR(-EINVAL);
220 }
221
222 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
223 struct genl_info *info)
224 {
225 return devlink_sb_get_from_attrs(devlink, info->attrs);
226 }
227
228 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
229 struct nlattr **attrs,
230 u16 *p_pool_index)
231 {
232 u16 val;
233
234 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
235 return -EINVAL;
236
237 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
238 if (val >= devlink_sb_pool_count(devlink_sb))
239 return -EINVAL;
240 *p_pool_index = val;
241 return 0;
242 }
243
244 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
245 struct genl_info *info,
246 u16 *p_pool_index)
247 {
248 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
249 p_pool_index);
250 }
251
252 static int
253 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
254 enum devlink_sb_pool_type *p_pool_type)
255 {
256 u8 val;
257
258 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
259 return -EINVAL;
260
261 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
262 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
263 val != DEVLINK_SB_POOL_TYPE_EGRESS)
264 return -EINVAL;
265 *p_pool_type = val;
266 return 0;
267 }
268
269 static int
270 devlink_sb_pool_type_get_from_info(struct genl_info *info,
271 enum devlink_sb_pool_type *p_pool_type)
272 {
273 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
274 }
275
276 static int
277 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
278 enum devlink_sb_threshold_type *p_th_type)
279 {
280 u8 val;
281
282 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
283 return -EINVAL;
284
285 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
286 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
287 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
288 return -EINVAL;
289 *p_th_type = val;
290 return 0;
291 }
292
293 static int
294 devlink_sb_th_type_get_from_info(struct genl_info *info,
295 enum devlink_sb_threshold_type *p_th_type)
296 {
297 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
298 }
299
300 static int
301 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
302 struct nlattr **attrs,
303 enum devlink_sb_pool_type pool_type,
304 u16 *p_tc_index)
305 {
306 u16 val;
307
308 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
309 return -EINVAL;
310
311 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
312 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
313 val >= devlink_sb->ingress_tc_count)
314 return -EINVAL;
315 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
316 val >= devlink_sb->egress_tc_count)
317 return -EINVAL;
318 *p_tc_index = val;
319 return 0;
320 }
321
322 static int
323 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
324 struct genl_info *info,
325 enum devlink_sb_pool_type pool_type,
326 u16 *p_tc_index)
327 {
328 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
329 pool_type, p_tc_index);
330 }
331
332 struct devlink_region {
333 struct devlink *devlink;
334 struct list_head list;
335 const char *name;
336 struct list_head snapshot_list;
337 u32 max_snapshots;
338 u32 cur_snapshots;
339 u64 size;
340 };
341
342 struct devlink_snapshot {
343 struct list_head list;
344 struct devlink_region *region;
345 devlink_snapshot_data_dest_t *data_destructor;
346 u64 data_len;
347 u8 *data;
348 u32 id;
349 };
350
351 static struct devlink_region *
352 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
353 {
354 struct devlink_region *region;
355
356 list_for_each_entry(region, &devlink->region_list, list)
357 if (!strcmp(region->name, region_name))
358 return region;
359
360 return NULL;
361 }
362
363 static struct devlink_snapshot *
364 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
365 {
366 struct devlink_snapshot *snapshot;
367
368 list_for_each_entry(snapshot, &region->snapshot_list, list)
369 if (snapshot->id == id)
370 return snapshot;
371
372 return NULL;
373 }
374
375 static void devlink_region_snapshot_del(struct devlink_snapshot *snapshot)
376 {
377 snapshot->region->cur_snapshots--;
378 list_del(&snapshot->list);
379 (*snapshot->data_destructor)(snapshot->data);
380 kfree(snapshot);
381 }
382
383 #define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
384 #define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
385 #define DEVLINK_NL_FLAG_NEED_SB BIT(2)
386
387 /* The per devlink instance lock is taken by default in the pre-doit
388 * operation, yet several commands do not require this. The global
389 * devlink lock is taken and protects from disruption by user-calls.
390 */
391 #define DEVLINK_NL_FLAG_NO_LOCK BIT(3)
392
393 static int devlink_nl_pre_doit(const struct genl_ops *ops,
394 struct sk_buff *skb, struct genl_info *info)
395 {
396 struct devlink *devlink;
397 int err;
398
399 mutex_lock(&devlink_mutex);
400 devlink = devlink_get_from_info(info);
401 if (IS_ERR(devlink)) {
402 mutex_unlock(&devlink_mutex);
403 return PTR_ERR(devlink);
404 }
405 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
406 mutex_lock(&devlink->lock);
407 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
408 info->user_ptr[0] = devlink;
409 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
410 struct devlink_port *devlink_port;
411
412 devlink_port = devlink_port_get_from_info(devlink, info);
413 if (IS_ERR(devlink_port)) {
414 err = PTR_ERR(devlink_port);
415 goto unlock;
416 }
417 info->user_ptr[0] = devlink_port;
418 }
419 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
420 struct devlink_sb *devlink_sb;
421
422 devlink_sb = devlink_sb_get_from_info(devlink, info);
423 if (IS_ERR(devlink_sb)) {
424 err = PTR_ERR(devlink_sb);
425 goto unlock;
426 }
427 info->user_ptr[1] = devlink_sb;
428 }
429 return 0;
430
431 unlock:
432 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
433 mutex_unlock(&devlink->lock);
434 mutex_unlock(&devlink_mutex);
435 return err;
436 }
437
438 static void devlink_nl_post_doit(const struct genl_ops *ops,
439 struct sk_buff *skb, struct genl_info *info)
440 {
441 struct devlink *devlink;
442
443 devlink = devlink_get_from_info(info);
444 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
445 mutex_unlock(&devlink->lock);
446 mutex_unlock(&devlink_mutex);
447 }
448
449 static struct genl_family devlink_nl_family;
450
451 enum devlink_multicast_groups {
452 DEVLINK_MCGRP_CONFIG,
453 };
454
455 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
456 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
457 };
458
459 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
460 {
461 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
462 return -EMSGSIZE;
463 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
464 return -EMSGSIZE;
465 return 0;
466 }
467
468 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
469 enum devlink_command cmd, u32 portid,
470 u32 seq, int flags)
471 {
472 void *hdr;
473
474 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
475 if (!hdr)
476 return -EMSGSIZE;
477
478 if (devlink_nl_put_handle(msg, devlink))
479 goto nla_put_failure;
480
481 genlmsg_end(msg, hdr);
482 return 0;
483
484 nla_put_failure:
485 genlmsg_cancel(msg, hdr);
486 return -EMSGSIZE;
487 }
488
489 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
490 {
491 struct sk_buff *msg;
492 int err;
493
494 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
495
496 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
497 if (!msg)
498 return;
499
500 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
501 if (err) {
502 nlmsg_free(msg);
503 return;
504 }
505
506 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
507 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
508 }
509
510 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
511 struct devlink_port *devlink_port)
512 {
513 struct devlink_port_attrs *attrs = &devlink_port->attrs;
514
515 if (!attrs->set)
516 return 0;
517 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
518 return -EMSGSIZE;
519 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, attrs->port_number))
520 return -EMSGSIZE;
521 if (!attrs->split)
522 return 0;
523 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, attrs->port_number))
524 return -EMSGSIZE;
525 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
526 attrs->split_subport_number))
527 return -EMSGSIZE;
528 return 0;
529 }
530
531 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
532 struct devlink_port *devlink_port,
533 enum devlink_command cmd, u32 portid,
534 u32 seq, int flags)
535 {
536 void *hdr;
537
538 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
539 if (!hdr)
540 return -EMSGSIZE;
541
542 if (devlink_nl_put_handle(msg, devlink))
543 goto nla_put_failure;
544 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
545 goto nla_put_failure;
546 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
547 goto nla_put_failure;
548 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
549 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
550 devlink_port->desired_type))
551 goto nla_put_failure;
552 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
553 struct net_device *netdev = devlink_port->type_dev;
554
555 if (netdev &&
556 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
557 netdev->ifindex) ||
558 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
559 netdev->name)))
560 goto nla_put_failure;
561 }
562 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
563 struct ib_device *ibdev = devlink_port->type_dev;
564
565 if (ibdev &&
566 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
567 ibdev->name))
568 goto nla_put_failure;
569 }
570 if (devlink_nl_port_attrs_put(msg, devlink_port))
571 goto nla_put_failure;
572
573 genlmsg_end(msg, hdr);
574 return 0;
575
576 nla_put_failure:
577 genlmsg_cancel(msg, hdr);
578 return -EMSGSIZE;
579 }
580
581 static void devlink_port_notify(struct devlink_port *devlink_port,
582 enum devlink_command cmd)
583 {
584 struct devlink *devlink = devlink_port->devlink;
585 struct sk_buff *msg;
586 int err;
587
588 if (!devlink_port->registered)
589 return;
590
591 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
592
593 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
594 if (!msg)
595 return;
596
597 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
598 if (err) {
599 nlmsg_free(msg);
600 return;
601 }
602
603 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
604 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
605 }
606
607 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
608 {
609 struct devlink *devlink = info->user_ptr[0];
610 struct sk_buff *msg;
611 int err;
612
613 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
614 if (!msg)
615 return -ENOMEM;
616
617 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
618 info->snd_portid, info->snd_seq, 0);
619 if (err) {
620 nlmsg_free(msg);
621 return err;
622 }
623
624 return genlmsg_reply(msg, info);
625 }
626
627 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
628 struct netlink_callback *cb)
629 {
630 struct devlink *devlink;
631 int start = cb->args[0];
632 int idx = 0;
633 int err;
634
635 mutex_lock(&devlink_mutex);
636 list_for_each_entry(devlink, &devlink_list, list) {
637 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
638 continue;
639 if (idx < start) {
640 idx++;
641 continue;
642 }
643 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
644 NETLINK_CB(cb->skb).portid,
645 cb->nlh->nlmsg_seq, NLM_F_MULTI);
646 if (err)
647 goto out;
648 idx++;
649 }
650 out:
651 mutex_unlock(&devlink_mutex);
652
653 cb->args[0] = idx;
654 return msg->len;
655 }
656
657 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
658 struct genl_info *info)
659 {
660 struct devlink_port *devlink_port = info->user_ptr[0];
661 struct devlink *devlink = devlink_port->devlink;
662 struct sk_buff *msg;
663 int err;
664
665 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
666 if (!msg)
667 return -ENOMEM;
668
669 err = devlink_nl_port_fill(msg, devlink, devlink_port,
670 DEVLINK_CMD_PORT_NEW,
671 info->snd_portid, info->snd_seq, 0);
672 if (err) {
673 nlmsg_free(msg);
674 return err;
675 }
676
677 return genlmsg_reply(msg, info);
678 }
679
680 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
681 struct netlink_callback *cb)
682 {
683 struct devlink *devlink;
684 struct devlink_port *devlink_port;
685 int start = cb->args[0];
686 int idx = 0;
687 int err;
688
689 mutex_lock(&devlink_mutex);
690 list_for_each_entry(devlink, &devlink_list, list) {
691 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
692 continue;
693 mutex_lock(&devlink->lock);
694 list_for_each_entry(devlink_port, &devlink->port_list, list) {
695 if (idx < start) {
696 idx++;
697 continue;
698 }
699 err = devlink_nl_port_fill(msg, devlink, devlink_port,
700 DEVLINK_CMD_NEW,
701 NETLINK_CB(cb->skb).portid,
702 cb->nlh->nlmsg_seq,
703 NLM_F_MULTI);
704 if (err) {
705 mutex_unlock(&devlink->lock);
706 goto out;
707 }
708 idx++;
709 }
710 mutex_unlock(&devlink->lock);
711 }
712 out:
713 mutex_unlock(&devlink_mutex);
714
715 cb->args[0] = idx;
716 return msg->len;
717 }
718
719 static int devlink_port_type_set(struct devlink *devlink,
720 struct devlink_port *devlink_port,
721 enum devlink_port_type port_type)
722
723 {
724 int err;
725
726 if (devlink->ops->port_type_set) {
727 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
728 return -EINVAL;
729 if (port_type == devlink_port->type)
730 return 0;
731 err = devlink->ops->port_type_set(devlink_port, port_type);
732 if (err)
733 return err;
734 devlink_port->desired_type = port_type;
735 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
736 return 0;
737 }
738 return -EOPNOTSUPP;
739 }
740
741 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
742 struct genl_info *info)
743 {
744 struct devlink_port *devlink_port = info->user_ptr[0];
745 struct devlink *devlink = devlink_port->devlink;
746 int err;
747
748 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
749 enum devlink_port_type port_type;
750
751 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
752 err = devlink_port_type_set(devlink, devlink_port, port_type);
753 if (err)
754 return err;
755 }
756 return 0;
757 }
758
759 static int devlink_port_split(struct devlink *devlink, u32 port_index,
760 u32 count, struct netlink_ext_ack *extack)
761
762 {
763 if (devlink->ops->port_split)
764 return devlink->ops->port_split(devlink, port_index, count,
765 extack);
766 return -EOPNOTSUPP;
767 }
768
769 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
770 struct genl_info *info)
771 {
772 struct devlink *devlink = info->user_ptr[0];
773 u32 port_index;
774 u32 count;
775
776 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
777 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
778 return -EINVAL;
779
780 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
781 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
782 return devlink_port_split(devlink, port_index, count, info->extack);
783 }
784
785 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
786 struct netlink_ext_ack *extack)
787
788 {
789 if (devlink->ops->port_unsplit)
790 return devlink->ops->port_unsplit(devlink, port_index, extack);
791 return -EOPNOTSUPP;
792 }
793
794 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
795 struct genl_info *info)
796 {
797 struct devlink *devlink = info->user_ptr[0];
798 u32 port_index;
799
800 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
801 return -EINVAL;
802
803 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
804 return devlink_port_unsplit(devlink, port_index, info->extack);
805 }
806
807 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
808 struct devlink_sb *devlink_sb,
809 enum devlink_command cmd, u32 portid,
810 u32 seq, int flags)
811 {
812 void *hdr;
813
814 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
815 if (!hdr)
816 return -EMSGSIZE;
817
818 if (devlink_nl_put_handle(msg, devlink))
819 goto nla_put_failure;
820 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
821 goto nla_put_failure;
822 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
823 goto nla_put_failure;
824 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
825 devlink_sb->ingress_pools_count))
826 goto nla_put_failure;
827 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
828 devlink_sb->egress_pools_count))
829 goto nla_put_failure;
830 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
831 devlink_sb->ingress_tc_count))
832 goto nla_put_failure;
833 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
834 devlink_sb->egress_tc_count))
835 goto nla_put_failure;
836
837 genlmsg_end(msg, hdr);
838 return 0;
839
840 nla_put_failure:
841 genlmsg_cancel(msg, hdr);
842 return -EMSGSIZE;
843 }
844
845 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
846 struct genl_info *info)
847 {
848 struct devlink *devlink = info->user_ptr[0];
849 struct devlink_sb *devlink_sb = info->user_ptr[1];
850 struct sk_buff *msg;
851 int err;
852
853 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
854 if (!msg)
855 return -ENOMEM;
856
857 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
858 DEVLINK_CMD_SB_NEW,
859 info->snd_portid, info->snd_seq, 0);
860 if (err) {
861 nlmsg_free(msg);
862 return err;
863 }
864
865 return genlmsg_reply(msg, info);
866 }
867
868 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
869 struct netlink_callback *cb)
870 {
871 struct devlink *devlink;
872 struct devlink_sb *devlink_sb;
873 int start = cb->args[0];
874 int idx = 0;
875 int err;
876
877 mutex_lock(&devlink_mutex);
878 list_for_each_entry(devlink, &devlink_list, list) {
879 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
880 continue;
881 mutex_lock(&devlink->lock);
882 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
883 if (idx < start) {
884 idx++;
885 continue;
886 }
887 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
888 DEVLINK_CMD_SB_NEW,
889 NETLINK_CB(cb->skb).portid,
890 cb->nlh->nlmsg_seq,
891 NLM_F_MULTI);
892 if (err) {
893 mutex_unlock(&devlink->lock);
894 goto out;
895 }
896 idx++;
897 }
898 mutex_unlock(&devlink->lock);
899 }
900 out:
901 mutex_unlock(&devlink_mutex);
902
903 cb->args[0] = idx;
904 return msg->len;
905 }
906
907 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
908 struct devlink_sb *devlink_sb,
909 u16 pool_index, enum devlink_command cmd,
910 u32 portid, u32 seq, int flags)
911 {
912 struct devlink_sb_pool_info pool_info;
913 void *hdr;
914 int err;
915
916 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
917 pool_index, &pool_info);
918 if (err)
919 return err;
920
921 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
922 if (!hdr)
923 return -EMSGSIZE;
924
925 if (devlink_nl_put_handle(msg, devlink))
926 goto nla_put_failure;
927 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
928 goto nla_put_failure;
929 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
930 goto nla_put_failure;
931 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
932 goto nla_put_failure;
933 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
934 goto nla_put_failure;
935 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
936 pool_info.threshold_type))
937 goto nla_put_failure;
938 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
939 pool_info.cell_size))
940 goto nla_put_failure;
941
942 genlmsg_end(msg, hdr);
943 return 0;
944
945 nla_put_failure:
946 genlmsg_cancel(msg, hdr);
947 return -EMSGSIZE;
948 }
949
950 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
951 struct genl_info *info)
952 {
953 struct devlink *devlink = info->user_ptr[0];
954 struct devlink_sb *devlink_sb = info->user_ptr[1];
955 struct sk_buff *msg;
956 u16 pool_index;
957 int err;
958
959 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
960 &pool_index);
961 if (err)
962 return err;
963
964 if (!devlink->ops->sb_pool_get)
965 return -EOPNOTSUPP;
966
967 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
968 if (!msg)
969 return -ENOMEM;
970
971 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
972 DEVLINK_CMD_SB_POOL_NEW,
973 info->snd_portid, info->snd_seq, 0);
974 if (err) {
975 nlmsg_free(msg);
976 return err;
977 }
978
979 return genlmsg_reply(msg, info);
980 }
981
982 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
983 struct devlink *devlink,
984 struct devlink_sb *devlink_sb,
985 u32 portid, u32 seq)
986 {
987 u16 pool_count = devlink_sb_pool_count(devlink_sb);
988 u16 pool_index;
989 int err;
990
991 for (pool_index = 0; pool_index < pool_count; pool_index++) {
992 if (*p_idx < start) {
993 (*p_idx)++;
994 continue;
995 }
996 err = devlink_nl_sb_pool_fill(msg, devlink,
997 devlink_sb,
998 pool_index,
999 DEVLINK_CMD_SB_POOL_NEW,
1000 portid, seq, NLM_F_MULTI);
1001 if (err)
1002 return err;
1003 (*p_idx)++;
1004 }
1005 return 0;
1006 }
1007
1008 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1009 struct netlink_callback *cb)
1010 {
1011 struct devlink *devlink;
1012 struct devlink_sb *devlink_sb;
1013 int start = cb->args[0];
1014 int idx = 0;
1015 int err;
1016
1017 mutex_lock(&devlink_mutex);
1018 list_for_each_entry(devlink, &devlink_list, list) {
1019 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1020 !devlink->ops->sb_pool_get)
1021 continue;
1022 mutex_lock(&devlink->lock);
1023 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1024 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1025 devlink_sb,
1026 NETLINK_CB(cb->skb).portid,
1027 cb->nlh->nlmsg_seq);
1028 if (err && err != -EOPNOTSUPP) {
1029 mutex_unlock(&devlink->lock);
1030 goto out;
1031 }
1032 }
1033 mutex_unlock(&devlink->lock);
1034 }
1035 out:
1036 mutex_unlock(&devlink_mutex);
1037
1038 cb->args[0] = idx;
1039 return msg->len;
1040 }
1041
1042 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1043 u16 pool_index, u32 size,
1044 enum devlink_sb_threshold_type threshold_type)
1045
1046 {
1047 const struct devlink_ops *ops = devlink->ops;
1048
1049 if (ops->sb_pool_set)
1050 return ops->sb_pool_set(devlink, sb_index, pool_index,
1051 size, threshold_type);
1052 return -EOPNOTSUPP;
1053 }
1054
1055 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1056 struct genl_info *info)
1057 {
1058 struct devlink *devlink = info->user_ptr[0];
1059 struct devlink_sb *devlink_sb = info->user_ptr[1];
1060 enum devlink_sb_threshold_type threshold_type;
1061 u16 pool_index;
1062 u32 size;
1063 int err;
1064
1065 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1066 &pool_index);
1067 if (err)
1068 return err;
1069
1070 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1071 if (err)
1072 return err;
1073
1074 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1075 return -EINVAL;
1076
1077 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1078 return devlink_sb_pool_set(devlink, devlink_sb->index,
1079 pool_index, size, threshold_type);
1080 }
1081
1082 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1083 struct devlink *devlink,
1084 struct devlink_port *devlink_port,
1085 struct devlink_sb *devlink_sb,
1086 u16 pool_index,
1087 enum devlink_command cmd,
1088 u32 portid, u32 seq, int flags)
1089 {
1090 const struct devlink_ops *ops = devlink->ops;
1091 u32 threshold;
1092 void *hdr;
1093 int err;
1094
1095 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1096 pool_index, &threshold);
1097 if (err)
1098 return err;
1099
1100 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1101 if (!hdr)
1102 return -EMSGSIZE;
1103
1104 if (devlink_nl_put_handle(msg, devlink))
1105 goto nla_put_failure;
1106 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1107 goto nla_put_failure;
1108 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1109 goto nla_put_failure;
1110 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1111 goto nla_put_failure;
1112 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1113 goto nla_put_failure;
1114
1115 if (ops->sb_occ_port_pool_get) {
1116 u32 cur;
1117 u32 max;
1118
1119 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1120 pool_index, &cur, &max);
1121 if (err && err != -EOPNOTSUPP)
1122 return err;
1123 if (!err) {
1124 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1125 goto nla_put_failure;
1126 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1127 goto nla_put_failure;
1128 }
1129 }
1130
1131 genlmsg_end(msg, hdr);
1132 return 0;
1133
1134 nla_put_failure:
1135 genlmsg_cancel(msg, hdr);
1136 return -EMSGSIZE;
1137 }
1138
1139 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1140 struct genl_info *info)
1141 {
1142 struct devlink_port *devlink_port = info->user_ptr[0];
1143 struct devlink *devlink = devlink_port->devlink;
1144 struct devlink_sb *devlink_sb = info->user_ptr[1];
1145 struct sk_buff *msg;
1146 u16 pool_index;
1147 int err;
1148
1149 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1150 &pool_index);
1151 if (err)
1152 return err;
1153
1154 if (!devlink->ops->sb_port_pool_get)
1155 return -EOPNOTSUPP;
1156
1157 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1158 if (!msg)
1159 return -ENOMEM;
1160
1161 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1162 devlink_sb, pool_index,
1163 DEVLINK_CMD_SB_PORT_POOL_NEW,
1164 info->snd_portid, info->snd_seq, 0);
1165 if (err) {
1166 nlmsg_free(msg);
1167 return err;
1168 }
1169
1170 return genlmsg_reply(msg, info);
1171 }
1172
1173 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1174 struct devlink *devlink,
1175 struct devlink_sb *devlink_sb,
1176 u32 portid, u32 seq)
1177 {
1178 struct devlink_port *devlink_port;
1179 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1180 u16 pool_index;
1181 int err;
1182
1183 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1184 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1185 if (*p_idx < start) {
1186 (*p_idx)++;
1187 continue;
1188 }
1189 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1190 devlink_port,
1191 devlink_sb,
1192 pool_index,
1193 DEVLINK_CMD_SB_PORT_POOL_NEW,
1194 portid, seq,
1195 NLM_F_MULTI);
1196 if (err)
1197 return err;
1198 (*p_idx)++;
1199 }
1200 }
1201 return 0;
1202 }
1203
1204 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1205 struct netlink_callback *cb)
1206 {
1207 struct devlink *devlink;
1208 struct devlink_sb *devlink_sb;
1209 int start = cb->args[0];
1210 int idx = 0;
1211 int err;
1212
1213 mutex_lock(&devlink_mutex);
1214 list_for_each_entry(devlink, &devlink_list, list) {
1215 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1216 !devlink->ops->sb_port_pool_get)
1217 continue;
1218 mutex_lock(&devlink->lock);
1219 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1220 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1221 devlink, devlink_sb,
1222 NETLINK_CB(cb->skb).portid,
1223 cb->nlh->nlmsg_seq);
1224 if (err && err != -EOPNOTSUPP) {
1225 mutex_unlock(&devlink->lock);
1226 goto out;
1227 }
1228 }
1229 mutex_unlock(&devlink->lock);
1230 }
1231 out:
1232 mutex_unlock(&devlink_mutex);
1233
1234 cb->args[0] = idx;
1235 return msg->len;
1236 }
1237
1238 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1239 unsigned int sb_index, u16 pool_index,
1240 u32 threshold)
1241
1242 {
1243 const struct devlink_ops *ops = devlink_port->devlink->ops;
1244
1245 if (ops->sb_port_pool_set)
1246 return ops->sb_port_pool_set(devlink_port, sb_index,
1247 pool_index, threshold);
1248 return -EOPNOTSUPP;
1249 }
1250
1251 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1252 struct genl_info *info)
1253 {
1254 struct devlink_port *devlink_port = info->user_ptr[0];
1255 struct devlink_sb *devlink_sb = info->user_ptr[1];
1256 u16 pool_index;
1257 u32 threshold;
1258 int err;
1259
1260 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1261 &pool_index);
1262 if (err)
1263 return err;
1264
1265 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1266 return -EINVAL;
1267
1268 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1269 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1270 pool_index, threshold);
1271 }
1272
1273 static int
1274 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1275 struct devlink_port *devlink_port,
1276 struct devlink_sb *devlink_sb, u16 tc_index,
1277 enum devlink_sb_pool_type pool_type,
1278 enum devlink_command cmd,
1279 u32 portid, u32 seq, int flags)
1280 {
1281 const struct devlink_ops *ops = devlink->ops;
1282 u16 pool_index;
1283 u32 threshold;
1284 void *hdr;
1285 int err;
1286
1287 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1288 tc_index, pool_type,
1289 &pool_index, &threshold);
1290 if (err)
1291 return err;
1292
1293 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1294 if (!hdr)
1295 return -EMSGSIZE;
1296
1297 if (devlink_nl_put_handle(msg, devlink))
1298 goto nla_put_failure;
1299 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1300 goto nla_put_failure;
1301 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1302 goto nla_put_failure;
1303 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1304 goto nla_put_failure;
1305 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1306 goto nla_put_failure;
1307 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1308 goto nla_put_failure;
1309 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1310 goto nla_put_failure;
1311
1312 if (ops->sb_occ_tc_port_bind_get) {
1313 u32 cur;
1314 u32 max;
1315
1316 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1317 devlink_sb->index,
1318 tc_index, pool_type,
1319 &cur, &max);
1320 if (err && err != -EOPNOTSUPP)
1321 return err;
1322 if (!err) {
1323 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1324 goto nla_put_failure;
1325 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1326 goto nla_put_failure;
1327 }
1328 }
1329
1330 genlmsg_end(msg, hdr);
1331 return 0;
1332
1333 nla_put_failure:
1334 genlmsg_cancel(msg, hdr);
1335 return -EMSGSIZE;
1336 }
1337
1338 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1339 struct genl_info *info)
1340 {
1341 struct devlink_port *devlink_port = info->user_ptr[0];
1342 struct devlink *devlink = devlink_port->devlink;
1343 struct devlink_sb *devlink_sb = info->user_ptr[1];
1344 struct sk_buff *msg;
1345 enum devlink_sb_pool_type pool_type;
1346 u16 tc_index;
1347 int err;
1348
1349 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1350 if (err)
1351 return err;
1352
1353 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1354 pool_type, &tc_index);
1355 if (err)
1356 return err;
1357
1358 if (!devlink->ops->sb_tc_pool_bind_get)
1359 return -EOPNOTSUPP;
1360
1361 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1362 if (!msg)
1363 return -ENOMEM;
1364
1365 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1366 devlink_sb, tc_index, pool_type,
1367 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1368 info->snd_portid,
1369 info->snd_seq, 0);
1370 if (err) {
1371 nlmsg_free(msg);
1372 return err;
1373 }
1374
1375 return genlmsg_reply(msg, info);
1376 }
1377
1378 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1379 int start, int *p_idx,
1380 struct devlink *devlink,
1381 struct devlink_sb *devlink_sb,
1382 u32 portid, u32 seq)
1383 {
1384 struct devlink_port *devlink_port;
1385 u16 tc_index;
1386 int err;
1387
1388 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1389 for (tc_index = 0;
1390 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1391 if (*p_idx < start) {
1392 (*p_idx)++;
1393 continue;
1394 }
1395 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1396 devlink_port,
1397 devlink_sb,
1398 tc_index,
1399 DEVLINK_SB_POOL_TYPE_INGRESS,
1400 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1401 portid, seq,
1402 NLM_F_MULTI);
1403 if (err)
1404 return err;
1405 (*p_idx)++;
1406 }
1407 for (tc_index = 0;
1408 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1409 if (*p_idx < start) {
1410 (*p_idx)++;
1411 continue;
1412 }
1413 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1414 devlink_port,
1415 devlink_sb,
1416 tc_index,
1417 DEVLINK_SB_POOL_TYPE_EGRESS,
1418 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1419 portid, seq,
1420 NLM_F_MULTI);
1421 if (err)
1422 return err;
1423 (*p_idx)++;
1424 }
1425 }
1426 return 0;
1427 }
1428
1429 static int
1430 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1431 struct netlink_callback *cb)
1432 {
1433 struct devlink *devlink;
1434 struct devlink_sb *devlink_sb;
1435 int start = cb->args[0];
1436 int idx = 0;
1437 int err;
1438
1439 mutex_lock(&devlink_mutex);
1440 list_for_each_entry(devlink, &devlink_list, list) {
1441 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1442 !devlink->ops->sb_tc_pool_bind_get)
1443 continue;
1444
1445 mutex_lock(&devlink->lock);
1446 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1447 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1448 devlink,
1449 devlink_sb,
1450 NETLINK_CB(cb->skb).portid,
1451 cb->nlh->nlmsg_seq);
1452 if (err && err != -EOPNOTSUPP) {
1453 mutex_unlock(&devlink->lock);
1454 goto out;
1455 }
1456 }
1457 mutex_unlock(&devlink->lock);
1458 }
1459 out:
1460 mutex_unlock(&devlink_mutex);
1461
1462 cb->args[0] = idx;
1463 return msg->len;
1464 }
1465
1466 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1467 unsigned int sb_index, u16 tc_index,
1468 enum devlink_sb_pool_type pool_type,
1469 u16 pool_index, u32 threshold)
1470
1471 {
1472 const struct devlink_ops *ops = devlink_port->devlink->ops;
1473
1474 if (ops->sb_tc_pool_bind_set)
1475 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1476 tc_index, pool_type,
1477 pool_index, threshold);
1478 return -EOPNOTSUPP;
1479 }
1480
1481 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1482 struct genl_info *info)
1483 {
1484 struct devlink_port *devlink_port = info->user_ptr[0];
1485 struct devlink_sb *devlink_sb = info->user_ptr[1];
1486 enum devlink_sb_pool_type pool_type;
1487 u16 tc_index;
1488 u16 pool_index;
1489 u32 threshold;
1490 int err;
1491
1492 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1493 if (err)
1494 return err;
1495
1496 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1497 pool_type, &tc_index);
1498 if (err)
1499 return err;
1500
1501 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1502 &pool_index);
1503 if (err)
1504 return err;
1505
1506 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1507 return -EINVAL;
1508
1509 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1510 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1511 tc_index, pool_type,
1512 pool_index, threshold);
1513 }
1514
1515 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1516 struct genl_info *info)
1517 {
1518 struct devlink *devlink = info->user_ptr[0];
1519 struct devlink_sb *devlink_sb = info->user_ptr[1];
1520 const struct devlink_ops *ops = devlink->ops;
1521
1522 if (ops->sb_occ_snapshot)
1523 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1524 return -EOPNOTSUPP;
1525 }
1526
1527 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1528 struct genl_info *info)
1529 {
1530 struct devlink *devlink = info->user_ptr[0];
1531 struct devlink_sb *devlink_sb = info->user_ptr[1];
1532 const struct devlink_ops *ops = devlink->ops;
1533
1534 if (ops->sb_occ_max_clear)
1535 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1536 return -EOPNOTSUPP;
1537 }
1538
1539 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1540 enum devlink_command cmd, u32 portid,
1541 u32 seq, int flags)
1542 {
1543 const struct devlink_ops *ops = devlink->ops;
1544 u8 inline_mode, encap_mode;
1545 void *hdr;
1546 int err = 0;
1547 u16 mode;
1548
1549 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1550 if (!hdr)
1551 return -EMSGSIZE;
1552
1553 err = devlink_nl_put_handle(msg, devlink);
1554 if (err)
1555 goto nla_put_failure;
1556
1557 if (ops->eswitch_mode_get) {
1558 err = ops->eswitch_mode_get(devlink, &mode);
1559 if (err)
1560 goto nla_put_failure;
1561 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1562 if (err)
1563 goto nla_put_failure;
1564 }
1565
1566 if (ops->eswitch_inline_mode_get) {
1567 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1568 if (err)
1569 goto nla_put_failure;
1570 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1571 inline_mode);
1572 if (err)
1573 goto nla_put_failure;
1574 }
1575
1576 if (ops->eswitch_encap_mode_get) {
1577 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1578 if (err)
1579 goto nla_put_failure;
1580 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1581 if (err)
1582 goto nla_put_failure;
1583 }
1584
1585 genlmsg_end(msg, hdr);
1586 return 0;
1587
1588 nla_put_failure:
1589 genlmsg_cancel(msg, hdr);
1590 return err;
1591 }
1592
1593 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1594 struct genl_info *info)
1595 {
1596 struct devlink *devlink = info->user_ptr[0];
1597 struct sk_buff *msg;
1598 int err;
1599
1600 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1601 if (!msg)
1602 return -ENOMEM;
1603
1604 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1605 info->snd_portid, info->snd_seq, 0);
1606
1607 if (err) {
1608 nlmsg_free(msg);
1609 return err;
1610 }
1611
1612 return genlmsg_reply(msg, info);
1613 }
1614
1615 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1616 struct genl_info *info)
1617 {
1618 struct devlink *devlink = info->user_ptr[0];
1619 const struct devlink_ops *ops = devlink->ops;
1620 u8 inline_mode, encap_mode;
1621 int err = 0;
1622 u16 mode;
1623
1624 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1625 if (!ops->eswitch_mode_set)
1626 return -EOPNOTSUPP;
1627 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1628 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1629 if (err)
1630 return err;
1631 }
1632
1633 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1634 if (!ops->eswitch_inline_mode_set)
1635 return -EOPNOTSUPP;
1636 inline_mode = nla_get_u8(
1637 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1638 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1639 info->extack);
1640 if (err)
1641 return err;
1642 }
1643
1644 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1645 if (!ops->eswitch_encap_mode_set)
1646 return -EOPNOTSUPP;
1647 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1648 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1649 info->extack);
1650 if (err)
1651 return err;
1652 }
1653
1654 return 0;
1655 }
1656
1657 int devlink_dpipe_match_put(struct sk_buff *skb,
1658 struct devlink_dpipe_match *match)
1659 {
1660 struct devlink_dpipe_header *header = match->header;
1661 struct devlink_dpipe_field *field = &header->fields[match->field_id];
1662 struct nlattr *match_attr;
1663
1664 match_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_MATCH);
1665 if (!match_attr)
1666 return -EMSGSIZE;
1667
1668 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1669 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1670 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1671 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1672 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1673 goto nla_put_failure;
1674
1675 nla_nest_end(skb, match_attr);
1676 return 0;
1677
1678 nla_put_failure:
1679 nla_nest_cancel(skb, match_attr);
1680 return -EMSGSIZE;
1681 }
1682 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1683
1684 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1685 struct sk_buff *skb)
1686 {
1687 struct nlattr *matches_attr;
1688
1689 matches_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1690 if (!matches_attr)
1691 return -EMSGSIZE;
1692
1693 if (table->table_ops->matches_dump(table->priv, skb))
1694 goto nla_put_failure;
1695
1696 nla_nest_end(skb, matches_attr);
1697 return 0;
1698
1699 nla_put_failure:
1700 nla_nest_cancel(skb, matches_attr);
1701 return -EMSGSIZE;
1702 }
1703
1704 int devlink_dpipe_action_put(struct sk_buff *skb,
1705 struct devlink_dpipe_action *action)
1706 {
1707 struct devlink_dpipe_header *header = action->header;
1708 struct devlink_dpipe_field *field = &header->fields[action->field_id];
1709 struct nlattr *action_attr;
1710
1711 action_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ACTION);
1712 if (!action_attr)
1713 return -EMSGSIZE;
1714
1715 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1716 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1717 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1718 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1719 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1720 goto nla_put_failure;
1721
1722 nla_nest_end(skb, action_attr);
1723 return 0;
1724
1725 nla_put_failure:
1726 nla_nest_cancel(skb, action_attr);
1727 return -EMSGSIZE;
1728 }
1729 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1730
1731 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1732 struct sk_buff *skb)
1733 {
1734 struct nlattr *actions_attr;
1735
1736 actions_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1737 if (!actions_attr)
1738 return -EMSGSIZE;
1739
1740 if (table->table_ops->actions_dump(table->priv, skb))
1741 goto nla_put_failure;
1742
1743 nla_nest_end(skb, actions_attr);
1744 return 0;
1745
1746 nla_put_failure:
1747 nla_nest_cancel(skb, actions_attr);
1748 return -EMSGSIZE;
1749 }
1750
1751 static int devlink_dpipe_table_put(struct sk_buff *skb,
1752 struct devlink_dpipe_table *table)
1753 {
1754 struct nlattr *table_attr;
1755 u64 table_size;
1756
1757 table_size = table->table_ops->size_get(table->priv);
1758 table_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE);
1759 if (!table_attr)
1760 return -EMSGSIZE;
1761
1762 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1763 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1764 DEVLINK_ATTR_PAD))
1765 goto nla_put_failure;
1766 if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1767 table->counters_enabled))
1768 goto nla_put_failure;
1769
1770 if (table->resource_valid) {
1771 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1772 table->resource_id, DEVLINK_ATTR_PAD) ||
1773 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1774 table->resource_units, DEVLINK_ATTR_PAD))
1775 goto nla_put_failure;
1776 }
1777 if (devlink_dpipe_matches_put(table, skb))
1778 goto nla_put_failure;
1779
1780 if (devlink_dpipe_actions_put(table, skb))
1781 goto nla_put_failure;
1782
1783 nla_nest_end(skb, table_attr);
1784 return 0;
1785
1786 nla_put_failure:
1787 nla_nest_cancel(skb, table_attr);
1788 return -EMSGSIZE;
1789 }
1790
1791 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1792 struct genl_info *info)
1793 {
1794 int err;
1795
1796 if (*pskb) {
1797 err = genlmsg_reply(*pskb, info);
1798 if (err)
1799 return err;
1800 }
1801 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1802 if (!*pskb)
1803 return -ENOMEM;
1804 return 0;
1805 }
1806
1807 static int devlink_dpipe_tables_fill(struct genl_info *info,
1808 enum devlink_command cmd, int flags,
1809 struct list_head *dpipe_tables,
1810 const char *table_name)
1811 {
1812 struct devlink *devlink = info->user_ptr[0];
1813 struct devlink_dpipe_table *table;
1814 struct nlattr *tables_attr;
1815 struct sk_buff *skb = NULL;
1816 struct nlmsghdr *nlh;
1817 bool incomplete;
1818 void *hdr;
1819 int i;
1820 int err;
1821
1822 table = list_first_entry(dpipe_tables,
1823 struct devlink_dpipe_table, list);
1824 start_again:
1825 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1826 if (err)
1827 return err;
1828
1829 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1830 &devlink_nl_family, NLM_F_MULTI, cmd);
1831 if (!hdr) {
1832 nlmsg_free(skb);
1833 return -EMSGSIZE;
1834 }
1835
1836 if (devlink_nl_put_handle(skb, devlink))
1837 goto nla_put_failure;
1838 tables_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLES);
1839 if (!tables_attr)
1840 goto nla_put_failure;
1841
1842 i = 0;
1843 incomplete = false;
1844 list_for_each_entry_from(table, dpipe_tables, list) {
1845 if (!table_name) {
1846 err = devlink_dpipe_table_put(skb, table);
1847 if (err) {
1848 if (!i)
1849 goto err_table_put;
1850 incomplete = true;
1851 break;
1852 }
1853 } else {
1854 if (!strcmp(table->name, table_name)) {
1855 err = devlink_dpipe_table_put(skb, table);
1856 if (err)
1857 break;
1858 }
1859 }
1860 i++;
1861 }
1862
1863 nla_nest_end(skb, tables_attr);
1864 genlmsg_end(skb, hdr);
1865 if (incomplete)
1866 goto start_again;
1867
1868 send_done:
1869 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1870 NLMSG_DONE, 0, flags | NLM_F_MULTI);
1871 if (!nlh) {
1872 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1873 if (err)
1874 return err;
1875 goto send_done;
1876 }
1877
1878 return genlmsg_reply(skb, info);
1879
1880 nla_put_failure:
1881 err = -EMSGSIZE;
1882 err_table_put:
1883 nlmsg_free(skb);
1884 return err;
1885 }
1886
1887 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1888 struct genl_info *info)
1889 {
1890 struct devlink *devlink = info->user_ptr[0];
1891 const char *table_name = NULL;
1892
1893 if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1894 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1895
1896 return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1897 &devlink->dpipe_table_list,
1898 table_name);
1899 }
1900
1901 static int devlink_dpipe_value_put(struct sk_buff *skb,
1902 struct devlink_dpipe_value *value)
1903 {
1904 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1905 value->value_size, value->value))
1906 return -EMSGSIZE;
1907 if (value->mask)
1908 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1909 value->value_size, value->mask))
1910 return -EMSGSIZE;
1911 if (value->mapping_valid)
1912 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1913 value->mapping_value))
1914 return -EMSGSIZE;
1915 return 0;
1916 }
1917
1918 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1919 struct devlink_dpipe_value *value)
1920 {
1921 if (!value->action)
1922 return -EINVAL;
1923 if (devlink_dpipe_action_put(skb, value->action))
1924 return -EMSGSIZE;
1925 if (devlink_dpipe_value_put(skb, value))
1926 return -EMSGSIZE;
1927 return 0;
1928 }
1929
1930 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1931 struct devlink_dpipe_value *values,
1932 unsigned int values_count)
1933 {
1934 struct nlattr *action_attr;
1935 int i;
1936 int err;
1937
1938 for (i = 0; i < values_count; i++) {
1939 action_attr = nla_nest_start(skb,
1940 DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1941 if (!action_attr)
1942 return -EMSGSIZE;
1943 err = devlink_dpipe_action_value_put(skb, &values[i]);
1944 if (err)
1945 goto err_action_value_put;
1946 nla_nest_end(skb, action_attr);
1947 }
1948 return 0;
1949
1950 err_action_value_put:
1951 nla_nest_cancel(skb, action_attr);
1952 return err;
1953 }
1954
1955 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
1956 struct devlink_dpipe_value *value)
1957 {
1958 if (!value->match)
1959 return -EINVAL;
1960 if (devlink_dpipe_match_put(skb, value->match))
1961 return -EMSGSIZE;
1962 if (devlink_dpipe_value_put(skb, value))
1963 return -EMSGSIZE;
1964 return 0;
1965 }
1966
1967 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
1968 struct devlink_dpipe_value *values,
1969 unsigned int values_count)
1970 {
1971 struct nlattr *match_attr;
1972 int i;
1973 int err;
1974
1975 for (i = 0; i < values_count; i++) {
1976 match_attr = nla_nest_start(skb,
1977 DEVLINK_ATTR_DPIPE_MATCH_VALUE);
1978 if (!match_attr)
1979 return -EMSGSIZE;
1980 err = devlink_dpipe_match_value_put(skb, &values[i]);
1981 if (err)
1982 goto err_match_value_put;
1983 nla_nest_end(skb, match_attr);
1984 }
1985 return 0;
1986
1987 err_match_value_put:
1988 nla_nest_cancel(skb, match_attr);
1989 return err;
1990 }
1991
1992 static int devlink_dpipe_entry_put(struct sk_buff *skb,
1993 struct devlink_dpipe_entry *entry)
1994 {
1995 struct nlattr *entry_attr, *matches_attr, *actions_attr;
1996 int err;
1997
1998 entry_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ENTRY);
1999 if (!entry_attr)
2000 return -EMSGSIZE;
2001
2002 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2003 DEVLINK_ATTR_PAD))
2004 goto nla_put_failure;
2005 if (entry->counter_valid)
2006 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2007 entry->counter, DEVLINK_ATTR_PAD))
2008 goto nla_put_failure;
2009
2010 matches_attr = nla_nest_start(skb,
2011 DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2012 if (!matches_attr)
2013 goto nla_put_failure;
2014
2015 err = devlink_dpipe_match_values_put(skb, entry->match_values,
2016 entry->match_values_count);
2017 if (err) {
2018 nla_nest_cancel(skb, matches_attr);
2019 goto err_match_values_put;
2020 }
2021 nla_nest_end(skb, matches_attr);
2022
2023 actions_attr = nla_nest_start(skb,
2024 DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2025 if (!actions_attr)
2026 goto nla_put_failure;
2027
2028 err = devlink_dpipe_action_values_put(skb, entry->action_values,
2029 entry->action_values_count);
2030 if (err) {
2031 nla_nest_cancel(skb, actions_attr);
2032 goto err_action_values_put;
2033 }
2034 nla_nest_end(skb, actions_attr);
2035
2036 nla_nest_end(skb, entry_attr);
2037 return 0;
2038
2039 nla_put_failure:
2040 err = -EMSGSIZE;
2041 err_match_values_put:
2042 err_action_values_put:
2043 nla_nest_cancel(skb, entry_attr);
2044 return err;
2045 }
2046
2047 static struct devlink_dpipe_table *
2048 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2049 const char *table_name)
2050 {
2051 struct devlink_dpipe_table *table;
2052
2053 list_for_each_entry_rcu(table, dpipe_tables, list) {
2054 if (!strcmp(table->name, table_name))
2055 return table;
2056 }
2057 return NULL;
2058 }
2059
2060 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2061 {
2062 struct devlink *devlink;
2063 int err;
2064
2065 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2066 dump_ctx->info);
2067 if (err)
2068 return err;
2069
2070 dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2071 dump_ctx->info->snd_portid,
2072 dump_ctx->info->snd_seq,
2073 &devlink_nl_family, NLM_F_MULTI,
2074 dump_ctx->cmd);
2075 if (!dump_ctx->hdr)
2076 goto nla_put_failure;
2077
2078 devlink = dump_ctx->info->user_ptr[0];
2079 if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2080 goto nla_put_failure;
2081 dump_ctx->nest = nla_nest_start(dump_ctx->skb,
2082 DEVLINK_ATTR_DPIPE_ENTRIES);
2083 if (!dump_ctx->nest)
2084 goto nla_put_failure;
2085 return 0;
2086
2087 nla_put_failure:
2088 nlmsg_free(dump_ctx->skb);
2089 return -EMSGSIZE;
2090 }
2091 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2092
2093 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2094 struct devlink_dpipe_entry *entry)
2095 {
2096 return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2097 }
2098 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2099
2100 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2101 {
2102 nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2103 genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2104 return 0;
2105 }
2106 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2107
2108 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2109
2110 {
2111 unsigned int value_count, value_index;
2112 struct devlink_dpipe_value *value;
2113
2114 value = entry->action_values;
2115 value_count = entry->action_values_count;
2116 for (value_index = 0; value_index < value_count; value_index++) {
2117 kfree(value[value_index].value);
2118 kfree(value[value_index].mask);
2119 }
2120
2121 value = entry->match_values;
2122 value_count = entry->match_values_count;
2123 for (value_index = 0; value_index < value_count; value_index++) {
2124 kfree(value[value_index].value);
2125 kfree(value[value_index].mask);
2126 }
2127 }
2128 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2129
2130 static int devlink_dpipe_entries_fill(struct genl_info *info,
2131 enum devlink_command cmd, int flags,
2132 struct devlink_dpipe_table *table)
2133 {
2134 struct devlink_dpipe_dump_ctx dump_ctx;
2135 struct nlmsghdr *nlh;
2136 int err;
2137
2138 dump_ctx.skb = NULL;
2139 dump_ctx.cmd = cmd;
2140 dump_ctx.info = info;
2141
2142 err = table->table_ops->entries_dump(table->priv,
2143 table->counters_enabled,
2144 &dump_ctx);
2145 if (err)
2146 return err;
2147
2148 send_done:
2149 nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2150 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2151 if (!nlh) {
2152 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2153 if (err)
2154 return err;
2155 goto send_done;
2156 }
2157 return genlmsg_reply(dump_ctx.skb, info);
2158 }
2159
2160 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2161 struct genl_info *info)
2162 {
2163 struct devlink *devlink = info->user_ptr[0];
2164 struct devlink_dpipe_table *table;
2165 const char *table_name;
2166
2167 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2168 return -EINVAL;
2169
2170 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2171 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2172 table_name);
2173 if (!table)
2174 return -EINVAL;
2175
2176 if (!table->table_ops->entries_dump)
2177 return -EINVAL;
2178
2179 return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2180 0, table);
2181 }
2182
2183 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2184 const struct devlink_dpipe_header *header)
2185 {
2186 struct devlink_dpipe_field *field;
2187 struct nlattr *field_attr;
2188 int i;
2189
2190 for (i = 0; i < header->fields_count; i++) {
2191 field = &header->fields[i];
2192 field_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_FIELD);
2193 if (!field_attr)
2194 return -EMSGSIZE;
2195 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2196 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2197 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2198 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2199 goto nla_put_failure;
2200 nla_nest_end(skb, field_attr);
2201 }
2202 return 0;
2203
2204 nla_put_failure:
2205 nla_nest_cancel(skb, field_attr);
2206 return -EMSGSIZE;
2207 }
2208
2209 static int devlink_dpipe_header_put(struct sk_buff *skb,
2210 struct devlink_dpipe_header *header)
2211 {
2212 struct nlattr *fields_attr, *header_attr;
2213 int err;
2214
2215 header_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER);
2216 if (!header_attr)
2217 return -EMSGSIZE;
2218
2219 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2220 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2221 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2222 goto nla_put_failure;
2223
2224 fields_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2225 if (!fields_attr)
2226 goto nla_put_failure;
2227
2228 err = devlink_dpipe_fields_put(skb, header);
2229 if (err) {
2230 nla_nest_cancel(skb, fields_attr);
2231 goto nla_put_failure;
2232 }
2233 nla_nest_end(skb, fields_attr);
2234 nla_nest_end(skb, header_attr);
2235 return 0;
2236
2237 nla_put_failure:
2238 err = -EMSGSIZE;
2239 nla_nest_cancel(skb, header_attr);
2240 return err;
2241 }
2242
2243 static int devlink_dpipe_headers_fill(struct genl_info *info,
2244 enum devlink_command cmd, int flags,
2245 struct devlink_dpipe_headers *
2246 dpipe_headers)
2247 {
2248 struct devlink *devlink = info->user_ptr[0];
2249 struct nlattr *headers_attr;
2250 struct sk_buff *skb = NULL;
2251 struct nlmsghdr *nlh;
2252 void *hdr;
2253 int i, j;
2254 int err;
2255
2256 i = 0;
2257 start_again:
2258 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2259 if (err)
2260 return err;
2261
2262 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2263 &devlink_nl_family, NLM_F_MULTI, cmd);
2264 if (!hdr) {
2265 nlmsg_free(skb);
2266 return -EMSGSIZE;
2267 }
2268
2269 if (devlink_nl_put_handle(skb, devlink))
2270 goto nla_put_failure;
2271 headers_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2272 if (!headers_attr)
2273 goto nla_put_failure;
2274
2275 j = 0;
2276 for (; i < dpipe_headers->headers_count; i++) {
2277 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2278 if (err) {
2279 if (!j)
2280 goto err_table_put;
2281 break;
2282 }
2283 j++;
2284 }
2285 nla_nest_end(skb, headers_attr);
2286 genlmsg_end(skb, hdr);
2287 if (i != dpipe_headers->headers_count)
2288 goto start_again;
2289
2290 send_done:
2291 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2292 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2293 if (!nlh) {
2294 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2295 if (err)
2296 return err;
2297 goto send_done;
2298 }
2299 return genlmsg_reply(skb, info);
2300
2301 nla_put_failure:
2302 err = -EMSGSIZE;
2303 err_table_put:
2304 nlmsg_free(skb);
2305 return err;
2306 }
2307
2308 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2309 struct genl_info *info)
2310 {
2311 struct devlink *devlink = info->user_ptr[0];
2312
2313 if (!devlink->dpipe_headers)
2314 return -EOPNOTSUPP;
2315 return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2316 0, devlink->dpipe_headers);
2317 }
2318
2319 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2320 const char *table_name,
2321 bool enable)
2322 {
2323 struct devlink_dpipe_table *table;
2324
2325 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2326 table_name);
2327 if (!table)
2328 return -EINVAL;
2329
2330 if (table->counter_control_extern)
2331 return -EOPNOTSUPP;
2332
2333 if (!(table->counters_enabled ^ enable))
2334 return 0;
2335
2336 table->counters_enabled = enable;
2337 if (table->table_ops->counters_set_update)
2338 table->table_ops->counters_set_update(table->priv, enable);
2339 return 0;
2340 }
2341
2342 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2343 struct genl_info *info)
2344 {
2345 struct devlink *devlink = info->user_ptr[0];
2346 const char *table_name;
2347 bool counters_enable;
2348
2349 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2350 !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2351 return -EINVAL;
2352
2353 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2354 counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2355
2356 return devlink_dpipe_table_counters_set(devlink, table_name,
2357 counters_enable);
2358 }
2359
2360 static struct devlink_resource *
2361 devlink_resource_find(struct devlink *devlink,
2362 struct devlink_resource *resource, u64 resource_id)
2363 {
2364 struct list_head *resource_list;
2365
2366 if (resource)
2367 resource_list = &resource->resource_list;
2368 else
2369 resource_list = &devlink->resource_list;
2370
2371 list_for_each_entry(resource, resource_list, list) {
2372 struct devlink_resource *child_resource;
2373
2374 if (resource->id == resource_id)
2375 return resource;
2376
2377 child_resource = devlink_resource_find(devlink, resource,
2378 resource_id);
2379 if (child_resource)
2380 return child_resource;
2381 }
2382 return NULL;
2383 }
2384
2385 static void
2386 devlink_resource_validate_children(struct devlink_resource *resource)
2387 {
2388 struct devlink_resource *child_resource;
2389 bool size_valid = true;
2390 u64 parts_size = 0;
2391
2392 if (list_empty(&resource->resource_list))
2393 goto out;
2394
2395 list_for_each_entry(child_resource, &resource->resource_list, list)
2396 parts_size += child_resource->size_new;
2397
2398 if (parts_size > resource->size_new)
2399 size_valid = false;
2400 out:
2401 resource->size_valid = size_valid;
2402 }
2403
2404 static int
2405 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2406 struct netlink_ext_ack *extack)
2407 {
2408 u64 reminder;
2409 int err = 0;
2410
2411 if (size > resource->size_params.size_max) {
2412 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2413 err = -EINVAL;
2414 }
2415
2416 if (size < resource->size_params.size_min) {
2417 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2418 err = -EINVAL;
2419 }
2420
2421 div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2422 if (reminder) {
2423 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2424 err = -EINVAL;
2425 }
2426
2427 return err;
2428 }
2429
2430 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2431 struct genl_info *info)
2432 {
2433 struct devlink *devlink = info->user_ptr[0];
2434 struct devlink_resource *resource;
2435 u64 resource_id;
2436 u64 size;
2437 int err;
2438
2439 if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2440 !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2441 return -EINVAL;
2442 resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2443
2444 resource = devlink_resource_find(devlink, NULL, resource_id);
2445 if (!resource)
2446 return -EINVAL;
2447
2448 size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2449 err = devlink_resource_validate_size(resource, size, info->extack);
2450 if (err)
2451 return err;
2452
2453 resource->size_new = size;
2454 devlink_resource_validate_children(resource);
2455 if (resource->parent)
2456 devlink_resource_validate_children(resource->parent);
2457 return 0;
2458 }
2459
2460 static int
2461 devlink_resource_size_params_put(struct devlink_resource *resource,
2462 struct sk_buff *skb)
2463 {
2464 struct devlink_resource_size_params *size_params;
2465
2466 size_params = &resource->size_params;
2467 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2468 size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2469 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2470 size_params->size_max, DEVLINK_ATTR_PAD) ||
2471 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2472 size_params->size_min, DEVLINK_ATTR_PAD) ||
2473 nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2474 return -EMSGSIZE;
2475 return 0;
2476 }
2477
2478 static int devlink_resource_occ_put(struct devlink_resource *resource,
2479 struct sk_buff *skb)
2480 {
2481 if (!resource->occ_get)
2482 return 0;
2483 return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2484 resource->occ_get(resource->occ_get_priv),
2485 DEVLINK_ATTR_PAD);
2486 }
2487
2488 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2489 struct devlink_resource *resource)
2490 {
2491 struct devlink_resource *child_resource;
2492 struct nlattr *child_resource_attr;
2493 struct nlattr *resource_attr;
2494
2495 resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE);
2496 if (!resource_attr)
2497 return -EMSGSIZE;
2498
2499 if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2500 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2501 DEVLINK_ATTR_PAD) ||
2502 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2503 DEVLINK_ATTR_PAD))
2504 goto nla_put_failure;
2505 if (resource->size != resource->size_new)
2506 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2507 resource->size_new, DEVLINK_ATTR_PAD);
2508 if (devlink_resource_occ_put(resource, skb))
2509 goto nla_put_failure;
2510 if (devlink_resource_size_params_put(resource, skb))
2511 goto nla_put_failure;
2512 if (list_empty(&resource->resource_list))
2513 goto out;
2514
2515 if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2516 resource->size_valid))
2517 goto nla_put_failure;
2518
2519 child_resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2520 if (!child_resource_attr)
2521 goto nla_put_failure;
2522
2523 list_for_each_entry(child_resource, &resource->resource_list, list) {
2524 if (devlink_resource_put(devlink, skb, child_resource))
2525 goto resource_put_failure;
2526 }
2527
2528 nla_nest_end(skb, child_resource_attr);
2529 out:
2530 nla_nest_end(skb, resource_attr);
2531 return 0;
2532
2533 resource_put_failure:
2534 nla_nest_cancel(skb, child_resource_attr);
2535 nla_put_failure:
2536 nla_nest_cancel(skb, resource_attr);
2537 return -EMSGSIZE;
2538 }
2539
2540 static int devlink_resource_fill(struct genl_info *info,
2541 enum devlink_command cmd, int flags)
2542 {
2543 struct devlink *devlink = info->user_ptr[0];
2544 struct devlink_resource *resource;
2545 struct nlattr *resources_attr;
2546 struct sk_buff *skb = NULL;
2547 struct nlmsghdr *nlh;
2548 bool incomplete;
2549 void *hdr;
2550 int i;
2551 int err;
2552
2553 resource = list_first_entry(&devlink->resource_list,
2554 struct devlink_resource, list);
2555 start_again:
2556 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2557 if (err)
2558 return err;
2559
2560 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2561 &devlink_nl_family, NLM_F_MULTI, cmd);
2562 if (!hdr) {
2563 nlmsg_free(skb);
2564 return -EMSGSIZE;
2565 }
2566
2567 if (devlink_nl_put_handle(skb, devlink))
2568 goto nla_put_failure;
2569
2570 resources_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2571 if (!resources_attr)
2572 goto nla_put_failure;
2573
2574 incomplete = false;
2575 i = 0;
2576 list_for_each_entry_from(resource, &devlink->resource_list, list) {
2577 err = devlink_resource_put(devlink, skb, resource);
2578 if (err) {
2579 if (!i)
2580 goto err_resource_put;
2581 incomplete = true;
2582 break;
2583 }
2584 i++;
2585 }
2586 nla_nest_end(skb, resources_attr);
2587 genlmsg_end(skb, hdr);
2588 if (incomplete)
2589 goto start_again;
2590 send_done:
2591 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2592 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2593 if (!nlh) {
2594 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2595 if (err)
2596 return err;
2597 goto send_done;
2598 }
2599 return genlmsg_reply(skb, info);
2600
2601 nla_put_failure:
2602 err = -EMSGSIZE;
2603 err_resource_put:
2604 nlmsg_free(skb);
2605 return err;
2606 }
2607
2608 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2609 struct genl_info *info)
2610 {
2611 struct devlink *devlink = info->user_ptr[0];
2612
2613 if (list_empty(&devlink->resource_list))
2614 return -EOPNOTSUPP;
2615
2616 return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2617 }
2618
2619 static int
2620 devlink_resources_validate(struct devlink *devlink,
2621 struct devlink_resource *resource,
2622 struct genl_info *info)
2623 {
2624 struct list_head *resource_list;
2625 int err = 0;
2626
2627 if (resource)
2628 resource_list = &resource->resource_list;
2629 else
2630 resource_list = &devlink->resource_list;
2631
2632 list_for_each_entry(resource, resource_list, list) {
2633 if (!resource->size_valid)
2634 return -EINVAL;
2635 err = devlink_resources_validate(devlink, resource, info);
2636 if (err)
2637 return err;
2638 }
2639 return err;
2640 }
2641
2642 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2643 {
2644 struct devlink *devlink = info->user_ptr[0];
2645 int err;
2646
2647 if (!devlink->ops->reload)
2648 return -EOPNOTSUPP;
2649
2650 err = devlink_resources_validate(devlink, NULL, info);
2651 if (err) {
2652 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2653 return err;
2654 }
2655 return devlink->ops->reload(devlink, info->extack);
2656 }
2657
2658 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2659 struct genl_info *info)
2660 {
2661 struct devlink *devlink = info->user_ptr[0];
2662 const char *file_name, *component;
2663 struct nlattr *nla_component;
2664
2665 if (!devlink->ops->flash_update)
2666 return -EOPNOTSUPP;
2667
2668 if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2669 return -EINVAL;
2670 file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2671
2672 nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2673 component = nla_component ? nla_data(nla_component) : NULL;
2674
2675 return devlink->ops->flash_update(devlink, file_name, component,
2676 info->extack);
2677 }
2678
2679 static const struct devlink_param devlink_param_generic[] = {
2680 {
2681 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2682 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2683 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2684 },
2685 {
2686 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2687 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2688 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2689 },
2690 {
2691 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2692 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2693 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2694 },
2695 {
2696 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2697 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2698 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2699 },
2700 {
2701 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2702 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2703 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2704 },
2705 {
2706 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2707 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2708 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2709 },
2710 {
2711 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2712 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2713 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2714 },
2715 {
2716 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
2717 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
2718 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
2719 },
2720 };
2721
2722 static int devlink_param_generic_verify(const struct devlink_param *param)
2723 {
2724 /* verify it match generic parameter by id and name */
2725 if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
2726 return -EINVAL;
2727 if (strcmp(param->name, devlink_param_generic[param->id].name))
2728 return -ENOENT;
2729
2730 WARN_ON(param->type != devlink_param_generic[param->id].type);
2731
2732 return 0;
2733 }
2734
2735 static int devlink_param_driver_verify(const struct devlink_param *param)
2736 {
2737 int i;
2738
2739 if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
2740 return -EINVAL;
2741 /* verify no such name in generic params */
2742 for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
2743 if (!strcmp(param->name, devlink_param_generic[i].name))
2744 return -EEXIST;
2745
2746 return 0;
2747 }
2748
2749 static struct devlink_param_item *
2750 devlink_param_find_by_name(struct list_head *param_list,
2751 const char *param_name)
2752 {
2753 struct devlink_param_item *param_item;
2754
2755 list_for_each_entry(param_item, param_list, list)
2756 if (!strcmp(param_item->param->name, param_name))
2757 return param_item;
2758 return NULL;
2759 }
2760
2761 static struct devlink_param_item *
2762 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
2763 {
2764 struct devlink_param_item *param_item;
2765
2766 list_for_each_entry(param_item, param_list, list)
2767 if (param_item->param->id == param_id)
2768 return param_item;
2769 return NULL;
2770 }
2771
2772 static bool
2773 devlink_param_cmode_is_supported(const struct devlink_param *param,
2774 enum devlink_param_cmode cmode)
2775 {
2776 return test_bit(cmode, &param->supported_cmodes);
2777 }
2778
2779 static int devlink_param_get(struct devlink *devlink,
2780 const struct devlink_param *param,
2781 struct devlink_param_gset_ctx *ctx)
2782 {
2783 if (!param->get)
2784 return -EOPNOTSUPP;
2785 return param->get(devlink, param->id, ctx);
2786 }
2787
2788 static int devlink_param_set(struct devlink *devlink,
2789 const struct devlink_param *param,
2790 struct devlink_param_gset_ctx *ctx)
2791 {
2792 if (!param->set)
2793 return -EOPNOTSUPP;
2794 return param->set(devlink, param->id, ctx);
2795 }
2796
2797 static int
2798 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
2799 {
2800 switch (param_type) {
2801 case DEVLINK_PARAM_TYPE_U8:
2802 return NLA_U8;
2803 case DEVLINK_PARAM_TYPE_U16:
2804 return NLA_U16;
2805 case DEVLINK_PARAM_TYPE_U32:
2806 return NLA_U32;
2807 case DEVLINK_PARAM_TYPE_STRING:
2808 return NLA_STRING;
2809 case DEVLINK_PARAM_TYPE_BOOL:
2810 return NLA_FLAG;
2811 default:
2812 return -EINVAL;
2813 }
2814 }
2815
2816 static int
2817 devlink_nl_param_value_fill_one(struct sk_buff *msg,
2818 enum devlink_param_type type,
2819 enum devlink_param_cmode cmode,
2820 union devlink_param_value val)
2821 {
2822 struct nlattr *param_value_attr;
2823
2824 param_value_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUE);
2825 if (!param_value_attr)
2826 goto nla_put_failure;
2827
2828 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
2829 goto value_nest_cancel;
2830
2831 switch (type) {
2832 case DEVLINK_PARAM_TYPE_U8:
2833 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
2834 goto value_nest_cancel;
2835 break;
2836 case DEVLINK_PARAM_TYPE_U16:
2837 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
2838 goto value_nest_cancel;
2839 break;
2840 case DEVLINK_PARAM_TYPE_U32:
2841 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
2842 goto value_nest_cancel;
2843 break;
2844 case DEVLINK_PARAM_TYPE_STRING:
2845 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
2846 val.vstr))
2847 goto value_nest_cancel;
2848 break;
2849 case DEVLINK_PARAM_TYPE_BOOL:
2850 if (val.vbool &&
2851 nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
2852 goto value_nest_cancel;
2853 break;
2854 }
2855
2856 nla_nest_end(msg, param_value_attr);
2857 return 0;
2858
2859 value_nest_cancel:
2860 nla_nest_cancel(msg, param_value_attr);
2861 nla_put_failure:
2862 return -EMSGSIZE;
2863 }
2864
2865 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
2866 unsigned int port_index,
2867 struct devlink_param_item *param_item,
2868 enum devlink_command cmd,
2869 u32 portid, u32 seq, int flags)
2870 {
2871 union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
2872 bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
2873 const struct devlink_param *param = param_item->param;
2874 struct devlink_param_gset_ctx ctx;
2875 struct nlattr *param_values_list;
2876 struct nlattr *param_attr;
2877 int nla_type;
2878 void *hdr;
2879 int err;
2880 int i;
2881
2882 /* Get value from driver part to driverinit configuration mode */
2883 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2884 if (!devlink_param_cmode_is_supported(param, i))
2885 continue;
2886 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
2887 if (!param_item->driverinit_value_valid)
2888 return -EOPNOTSUPP;
2889 param_value[i] = param_item->driverinit_value;
2890 } else {
2891 if (!param_item->published)
2892 continue;
2893 ctx.cmode = i;
2894 err = devlink_param_get(devlink, param, &ctx);
2895 if (err)
2896 return err;
2897 param_value[i] = ctx.val;
2898 }
2899 param_value_set[i] = true;
2900 }
2901
2902 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
2903 if (!hdr)
2904 return -EMSGSIZE;
2905
2906 if (devlink_nl_put_handle(msg, devlink))
2907 goto genlmsg_cancel;
2908
2909 if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
2910 cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
2911 cmd == DEVLINK_CMD_PORT_PARAM_DEL)
2912 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
2913 goto genlmsg_cancel;
2914
2915 param_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM);
2916 if (!param_attr)
2917 goto genlmsg_cancel;
2918 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
2919 goto param_nest_cancel;
2920 if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
2921 goto param_nest_cancel;
2922
2923 nla_type = devlink_param_type_to_nla_type(param->type);
2924 if (nla_type < 0)
2925 goto param_nest_cancel;
2926 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
2927 goto param_nest_cancel;
2928
2929 param_values_list = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUES_LIST);
2930 if (!param_values_list)
2931 goto param_nest_cancel;
2932
2933 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2934 if (!param_value_set[i])
2935 continue;
2936 err = devlink_nl_param_value_fill_one(msg, param->type,
2937 i, param_value[i]);
2938 if (err)
2939 goto values_list_nest_cancel;
2940 }
2941
2942 nla_nest_end(msg, param_values_list);
2943 nla_nest_end(msg, param_attr);
2944 genlmsg_end(msg, hdr);
2945 return 0;
2946
2947 values_list_nest_cancel:
2948 nla_nest_end(msg, param_values_list);
2949 param_nest_cancel:
2950 nla_nest_cancel(msg, param_attr);
2951 genlmsg_cancel:
2952 genlmsg_cancel(msg, hdr);
2953 return -EMSGSIZE;
2954 }
2955
2956 static void devlink_param_notify(struct devlink *devlink,
2957 unsigned int port_index,
2958 struct devlink_param_item *param_item,
2959 enum devlink_command cmd)
2960 {
2961 struct sk_buff *msg;
2962 int err;
2963
2964 WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
2965 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
2966 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
2967
2968 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2969 if (!msg)
2970 return;
2971 err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
2972 0, 0, 0);
2973 if (err) {
2974 nlmsg_free(msg);
2975 return;
2976 }
2977
2978 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2979 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2980 }
2981
2982 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
2983 struct netlink_callback *cb)
2984 {
2985 struct devlink_param_item *param_item;
2986 struct devlink *devlink;
2987 int start = cb->args[0];
2988 int idx = 0;
2989 int err;
2990
2991 mutex_lock(&devlink_mutex);
2992 list_for_each_entry(devlink, &devlink_list, list) {
2993 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
2994 continue;
2995 mutex_lock(&devlink->lock);
2996 list_for_each_entry(param_item, &devlink->param_list, list) {
2997 if (idx < start) {
2998 idx++;
2999 continue;
3000 }
3001 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3002 DEVLINK_CMD_PARAM_GET,
3003 NETLINK_CB(cb->skb).portid,
3004 cb->nlh->nlmsg_seq,
3005 NLM_F_MULTI);
3006 if (err) {
3007 mutex_unlock(&devlink->lock);
3008 goto out;
3009 }
3010 idx++;
3011 }
3012 mutex_unlock(&devlink->lock);
3013 }
3014 out:
3015 mutex_unlock(&devlink_mutex);
3016
3017 cb->args[0] = idx;
3018 return msg->len;
3019 }
3020
3021 static int
3022 devlink_param_type_get_from_info(struct genl_info *info,
3023 enum devlink_param_type *param_type)
3024 {
3025 if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3026 return -EINVAL;
3027
3028 switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3029 case NLA_U8:
3030 *param_type = DEVLINK_PARAM_TYPE_U8;
3031 break;
3032 case NLA_U16:
3033 *param_type = DEVLINK_PARAM_TYPE_U16;
3034 break;
3035 case NLA_U32:
3036 *param_type = DEVLINK_PARAM_TYPE_U32;
3037 break;
3038 case NLA_STRING:
3039 *param_type = DEVLINK_PARAM_TYPE_STRING;
3040 break;
3041 case NLA_FLAG:
3042 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3043 break;
3044 default:
3045 return -EINVAL;
3046 }
3047
3048 return 0;
3049 }
3050
3051 static int
3052 devlink_param_value_get_from_info(const struct devlink_param *param,
3053 struct genl_info *info,
3054 union devlink_param_value *value)
3055 {
3056 int len;
3057
3058 if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3059 !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3060 return -EINVAL;
3061
3062 switch (param->type) {
3063 case DEVLINK_PARAM_TYPE_U8:
3064 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3065 break;
3066 case DEVLINK_PARAM_TYPE_U16:
3067 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3068 break;
3069 case DEVLINK_PARAM_TYPE_U32:
3070 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3071 break;
3072 case DEVLINK_PARAM_TYPE_STRING:
3073 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3074 nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3075 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3076 len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3077 return -EINVAL;
3078 strcpy(value->vstr,
3079 nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3080 break;
3081 case DEVLINK_PARAM_TYPE_BOOL:
3082 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3083 true : false;
3084 break;
3085 }
3086 return 0;
3087 }
3088
3089 static struct devlink_param_item *
3090 devlink_param_get_from_info(struct list_head *param_list,
3091 struct genl_info *info)
3092 {
3093 char *param_name;
3094
3095 if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3096 return NULL;
3097
3098 param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3099 return devlink_param_find_by_name(param_list, param_name);
3100 }
3101
3102 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3103 struct genl_info *info)
3104 {
3105 struct devlink *devlink = info->user_ptr[0];
3106 struct devlink_param_item *param_item;
3107 struct sk_buff *msg;
3108 int err;
3109
3110 param_item = devlink_param_get_from_info(&devlink->param_list, info);
3111 if (!param_item)
3112 return -EINVAL;
3113
3114 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3115 if (!msg)
3116 return -ENOMEM;
3117
3118 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3119 DEVLINK_CMD_PARAM_GET,
3120 info->snd_portid, info->snd_seq, 0);
3121 if (err) {
3122 nlmsg_free(msg);
3123 return err;
3124 }
3125
3126 return genlmsg_reply(msg, info);
3127 }
3128
3129 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3130 unsigned int port_index,
3131 struct list_head *param_list,
3132 struct genl_info *info,
3133 enum devlink_command cmd)
3134 {
3135 enum devlink_param_type param_type;
3136 struct devlink_param_gset_ctx ctx;
3137 enum devlink_param_cmode cmode;
3138 struct devlink_param_item *param_item;
3139 const struct devlink_param *param;
3140 union devlink_param_value value;
3141 int err = 0;
3142
3143 param_item = devlink_param_get_from_info(param_list, info);
3144 if (!param_item)
3145 return -EINVAL;
3146 param = param_item->param;
3147 err = devlink_param_type_get_from_info(info, &param_type);
3148 if (err)
3149 return err;
3150 if (param_type != param->type)
3151 return -EINVAL;
3152 err = devlink_param_value_get_from_info(param, info, &value);
3153 if (err)
3154 return err;
3155 if (param->validate) {
3156 err = param->validate(devlink, param->id, value, info->extack);
3157 if (err)
3158 return err;
3159 }
3160
3161 if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3162 return -EINVAL;
3163 cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3164 if (!devlink_param_cmode_is_supported(param, cmode))
3165 return -EOPNOTSUPP;
3166
3167 if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3168 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3169 strcpy(param_item->driverinit_value.vstr, value.vstr);
3170 else
3171 param_item->driverinit_value = value;
3172 param_item->driverinit_value_valid = true;
3173 } else {
3174 if (!param->set)
3175 return -EOPNOTSUPP;
3176 ctx.val = value;
3177 ctx.cmode = cmode;
3178 err = devlink_param_set(devlink, param, &ctx);
3179 if (err)
3180 return err;
3181 }
3182
3183 devlink_param_notify(devlink, port_index, param_item, cmd);
3184 return 0;
3185 }
3186
3187 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3188 struct genl_info *info)
3189 {
3190 struct devlink *devlink = info->user_ptr[0];
3191
3192 return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3193 info, DEVLINK_CMD_PARAM_NEW);
3194 }
3195
3196 static int devlink_param_register_one(struct devlink *devlink,
3197 unsigned int port_index,
3198 struct list_head *param_list,
3199 const struct devlink_param *param,
3200 enum devlink_command cmd)
3201 {
3202 struct devlink_param_item *param_item;
3203
3204 if (devlink_param_find_by_name(param_list, param->name))
3205 return -EEXIST;
3206
3207 if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3208 WARN_ON(param->get || param->set);
3209 else
3210 WARN_ON(!param->get || !param->set);
3211
3212 param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3213 if (!param_item)
3214 return -ENOMEM;
3215 param_item->param = param;
3216
3217 list_add_tail(&param_item->list, param_list);
3218 devlink_param_notify(devlink, port_index, param_item, cmd);
3219 return 0;
3220 }
3221
3222 static void devlink_param_unregister_one(struct devlink *devlink,
3223 unsigned int port_index,
3224 struct list_head *param_list,
3225 const struct devlink_param *param,
3226 enum devlink_command cmd)
3227 {
3228 struct devlink_param_item *param_item;
3229
3230 param_item = devlink_param_find_by_name(param_list, param->name);
3231 WARN_ON(!param_item);
3232 devlink_param_notify(devlink, port_index, param_item, cmd);
3233 list_del(&param_item->list);
3234 kfree(param_item);
3235 }
3236
3237 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3238 struct netlink_callback *cb)
3239 {
3240 struct devlink_param_item *param_item;
3241 struct devlink_port *devlink_port;
3242 struct devlink *devlink;
3243 int start = cb->args[0];
3244 int idx = 0;
3245 int err;
3246
3247 mutex_lock(&devlink_mutex);
3248 list_for_each_entry(devlink, &devlink_list, list) {
3249 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3250 continue;
3251 mutex_lock(&devlink->lock);
3252 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3253 list_for_each_entry(param_item,
3254 &devlink_port->param_list, list) {
3255 if (idx < start) {
3256 idx++;
3257 continue;
3258 }
3259 err = devlink_nl_param_fill(msg,
3260 devlink_port->devlink,
3261 devlink_port->index, param_item,
3262 DEVLINK_CMD_PORT_PARAM_GET,
3263 NETLINK_CB(cb->skb).portid,
3264 cb->nlh->nlmsg_seq,
3265 NLM_F_MULTI);
3266 if (err) {
3267 mutex_unlock(&devlink->lock);
3268 goto out;
3269 }
3270 idx++;
3271 }
3272 }
3273 mutex_unlock(&devlink->lock);
3274 }
3275 out:
3276 mutex_unlock(&devlink_mutex);
3277
3278 cb->args[0] = idx;
3279 return msg->len;
3280 }
3281
3282 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3283 struct genl_info *info)
3284 {
3285 struct devlink_port *devlink_port = info->user_ptr[0];
3286 struct devlink_param_item *param_item;
3287 struct sk_buff *msg;
3288 int err;
3289
3290 param_item = devlink_param_get_from_info(&devlink_port->param_list,
3291 info);
3292 if (!param_item)
3293 return -EINVAL;
3294
3295 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3296 if (!msg)
3297 return -ENOMEM;
3298
3299 err = devlink_nl_param_fill(msg, devlink_port->devlink,
3300 devlink_port->index, param_item,
3301 DEVLINK_CMD_PORT_PARAM_GET,
3302 info->snd_portid, info->snd_seq, 0);
3303 if (err) {
3304 nlmsg_free(msg);
3305 return err;
3306 }
3307
3308 return genlmsg_reply(msg, info);
3309 }
3310
3311 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3312 struct genl_info *info)
3313 {
3314 struct devlink_port *devlink_port = info->user_ptr[0];
3315
3316 return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3317 devlink_port->index,
3318 &devlink_port->param_list, info,
3319 DEVLINK_CMD_PORT_PARAM_NEW);
3320 }
3321
3322 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3323 struct devlink *devlink,
3324 struct devlink_snapshot *snapshot)
3325 {
3326 struct nlattr *snap_attr;
3327 int err;
3328
3329 snap_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3330 if (!snap_attr)
3331 return -EINVAL;
3332
3333 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3334 if (err)
3335 goto nla_put_failure;
3336
3337 nla_nest_end(msg, snap_attr);
3338 return 0;
3339
3340 nla_put_failure:
3341 nla_nest_cancel(msg, snap_attr);
3342 return err;
3343 }
3344
3345 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3346 struct devlink *devlink,
3347 struct devlink_region *region)
3348 {
3349 struct devlink_snapshot *snapshot;
3350 struct nlattr *snapshots_attr;
3351 int err;
3352
3353 snapshots_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOTS);
3354 if (!snapshots_attr)
3355 return -EINVAL;
3356
3357 list_for_each_entry(snapshot, &region->snapshot_list, list) {
3358 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3359 if (err)
3360 goto nla_put_failure;
3361 }
3362
3363 nla_nest_end(msg, snapshots_attr);
3364 return 0;
3365
3366 nla_put_failure:
3367 nla_nest_cancel(msg, snapshots_attr);
3368 return err;
3369 }
3370
3371 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3372 enum devlink_command cmd, u32 portid,
3373 u32 seq, int flags,
3374 struct devlink_region *region)
3375 {
3376 void *hdr;
3377 int err;
3378
3379 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3380 if (!hdr)
3381 return -EMSGSIZE;
3382
3383 err = devlink_nl_put_handle(msg, devlink);
3384 if (err)
3385 goto nla_put_failure;
3386
3387 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3388 if (err)
3389 goto nla_put_failure;
3390
3391 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3392 region->size,
3393 DEVLINK_ATTR_PAD);
3394 if (err)
3395 goto nla_put_failure;
3396
3397 err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3398 if (err)
3399 goto nla_put_failure;
3400
3401 genlmsg_end(msg, hdr);
3402 return 0;
3403
3404 nla_put_failure:
3405 genlmsg_cancel(msg, hdr);
3406 return err;
3407 }
3408
3409 static void devlink_nl_region_notify(struct devlink_region *region,
3410 struct devlink_snapshot *snapshot,
3411 enum devlink_command cmd)
3412 {
3413 struct devlink *devlink = region->devlink;
3414 struct sk_buff *msg;
3415 void *hdr;
3416 int err;
3417
3418 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3419
3420 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3421 if (!msg)
3422 return;
3423
3424 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3425 if (!hdr)
3426 goto out_free_msg;
3427
3428 err = devlink_nl_put_handle(msg, devlink);
3429 if (err)
3430 goto out_cancel_msg;
3431
3432 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3433 region->name);
3434 if (err)
3435 goto out_cancel_msg;
3436
3437 if (snapshot) {
3438 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3439 snapshot->id);
3440 if (err)
3441 goto out_cancel_msg;
3442 } else {
3443 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3444 region->size, DEVLINK_ATTR_PAD);
3445 if (err)
3446 goto out_cancel_msg;
3447 }
3448 genlmsg_end(msg, hdr);
3449
3450 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3451 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3452
3453 return;
3454
3455 out_cancel_msg:
3456 genlmsg_cancel(msg, hdr);
3457 out_free_msg:
3458 nlmsg_free(msg);
3459 }
3460
3461 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3462 struct genl_info *info)
3463 {
3464 struct devlink *devlink = info->user_ptr[0];
3465 struct devlink_region *region;
3466 const char *region_name;
3467 struct sk_buff *msg;
3468 int err;
3469
3470 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3471 return -EINVAL;
3472
3473 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3474 region = devlink_region_get_by_name(devlink, region_name);
3475 if (!region)
3476 return -EINVAL;
3477
3478 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3479 if (!msg)
3480 return -ENOMEM;
3481
3482 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3483 info->snd_portid, info->snd_seq, 0,
3484 region);
3485 if (err) {
3486 nlmsg_free(msg);
3487 return err;
3488 }
3489
3490 return genlmsg_reply(msg, info);
3491 }
3492
3493 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3494 struct netlink_callback *cb)
3495 {
3496 struct devlink_region *region;
3497 struct devlink *devlink;
3498 int start = cb->args[0];
3499 int idx = 0;
3500 int err;
3501
3502 mutex_lock(&devlink_mutex);
3503 list_for_each_entry(devlink, &devlink_list, list) {
3504 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3505 continue;
3506
3507 mutex_lock(&devlink->lock);
3508 list_for_each_entry(region, &devlink->region_list, list) {
3509 if (idx < start) {
3510 idx++;
3511 continue;
3512 }
3513 err = devlink_nl_region_fill(msg, devlink,
3514 DEVLINK_CMD_REGION_GET,
3515 NETLINK_CB(cb->skb).portid,
3516 cb->nlh->nlmsg_seq,
3517 NLM_F_MULTI, region);
3518 if (err) {
3519 mutex_unlock(&devlink->lock);
3520 goto out;
3521 }
3522 idx++;
3523 }
3524 mutex_unlock(&devlink->lock);
3525 }
3526 out:
3527 mutex_unlock(&devlink_mutex);
3528 cb->args[0] = idx;
3529 return msg->len;
3530 }
3531
3532 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3533 struct genl_info *info)
3534 {
3535 struct devlink *devlink = info->user_ptr[0];
3536 struct devlink_snapshot *snapshot;
3537 struct devlink_region *region;
3538 const char *region_name;
3539 u32 snapshot_id;
3540
3541 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3542 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3543 return -EINVAL;
3544
3545 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3546 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3547
3548 region = devlink_region_get_by_name(devlink, region_name);
3549 if (!region)
3550 return -EINVAL;
3551
3552 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3553 if (!snapshot)
3554 return -EINVAL;
3555
3556 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3557 devlink_region_snapshot_del(snapshot);
3558 return 0;
3559 }
3560
3561 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3562 struct devlink *devlink,
3563 u8 *chunk, u32 chunk_size,
3564 u64 addr)
3565 {
3566 struct nlattr *chunk_attr;
3567 int err;
3568
3569 chunk_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_CHUNK);
3570 if (!chunk_attr)
3571 return -EINVAL;
3572
3573 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3574 if (err)
3575 goto nla_put_failure;
3576
3577 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3578 DEVLINK_ATTR_PAD);
3579 if (err)
3580 goto nla_put_failure;
3581
3582 nla_nest_end(msg, chunk_attr);
3583 return 0;
3584
3585 nla_put_failure:
3586 nla_nest_cancel(msg, chunk_attr);
3587 return err;
3588 }
3589
3590 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3591
3592 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3593 struct devlink *devlink,
3594 struct devlink_region *region,
3595 struct nlattr **attrs,
3596 u64 start_offset,
3597 u64 end_offset,
3598 bool dump,
3599 u64 *new_offset)
3600 {
3601 struct devlink_snapshot *snapshot;
3602 u64 curr_offset = start_offset;
3603 u32 snapshot_id;
3604 int err = 0;
3605
3606 *new_offset = start_offset;
3607
3608 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3609 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3610 if (!snapshot)
3611 return -EINVAL;
3612
3613 if (end_offset > snapshot->data_len || dump)
3614 end_offset = snapshot->data_len;
3615
3616 while (curr_offset < end_offset) {
3617 u32 data_size;
3618 u8 *data;
3619
3620 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3621 data_size = end_offset - curr_offset;
3622 else
3623 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3624
3625 data = &snapshot->data[curr_offset];
3626 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3627 data, data_size,
3628 curr_offset);
3629 if (err)
3630 break;
3631
3632 curr_offset += data_size;
3633 }
3634 *new_offset = curr_offset;
3635
3636 return err;
3637 }
3638
3639 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3640 struct netlink_callback *cb)
3641 {
3642 u64 ret_offset, start_offset, end_offset = 0;
3643 struct devlink_region *region;
3644 struct nlattr *chunks_attr;
3645 const char *region_name;
3646 struct devlink *devlink;
3647 struct nlattr **attrs;
3648 bool dump = true;
3649 void *hdr;
3650 int err;
3651
3652 start_offset = *((u64 *)&cb->args[0]);
3653
3654 attrs = kmalloc_array(DEVLINK_ATTR_MAX + 1, sizeof(*attrs), GFP_KERNEL);
3655 if (!attrs)
3656 return -ENOMEM;
3657
3658 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + devlink_nl_family.hdrsize,
3659 attrs, DEVLINK_ATTR_MAX, devlink_nl_family.policy,
3660 cb->extack);
3661 if (err)
3662 goto out_free;
3663
3664 mutex_lock(&devlink_mutex);
3665 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3666 if (IS_ERR(devlink)) {
3667 err = PTR_ERR(devlink);
3668 goto out_dev;
3669 }
3670
3671 mutex_lock(&devlink->lock);
3672
3673 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3674 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3675 err = -EINVAL;
3676 goto out_unlock;
3677 }
3678
3679 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3680 region = devlink_region_get_by_name(devlink, region_name);
3681 if (!region) {
3682 err = -EINVAL;
3683 goto out_unlock;
3684 }
3685
3686 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3687 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3688 DEVLINK_CMD_REGION_READ);
3689 if (!hdr) {
3690 err = -EMSGSIZE;
3691 goto out_unlock;
3692 }
3693
3694 err = devlink_nl_put_handle(skb, devlink);
3695 if (err)
3696 goto nla_put_failure;
3697
3698 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3699 if (err)
3700 goto nla_put_failure;
3701
3702 chunks_attr = nla_nest_start(skb, DEVLINK_ATTR_REGION_CHUNKS);
3703 if (!chunks_attr) {
3704 err = -EMSGSIZE;
3705 goto nla_put_failure;
3706 }
3707
3708 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
3709 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
3710 if (!start_offset)
3711 start_offset =
3712 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3713
3714 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3715 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
3716 dump = false;
3717 }
3718
3719 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
3720 region, attrs,
3721 start_offset,
3722 end_offset, dump,
3723 &ret_offset);
3724
3725 if (err && err != -EMSGSIZE)
3726 goto nla_put_failure;
3727
3728 /* Check if there was any progress done to prevent infinite loop */
3729 if (ret_offset == start_offset) {
3730 err = -EINVAL;
3731 goto nla_put_failure;
3732 }
3733
3734 *((u64 *)&cb->args[0]) = ret_offset;
3735
3736 nla_nest_end(skb, chunks_attr);
3737 genlmsg_end(skb, hdr);
3738 mutex_unlock(&devlink->lock);
3739 mutex_unlock(&devlink_mutex);
3740 kfree(attrs);
3741
3742 return skb->len;
3743
3744 nla_put_failure:
3745 genlmsg_cancel(skb, hdr);
3746 out_unlock:
3747 mutex_unlock(&devlink->lock);
3748 out_dev:
3749 mutex_unlock(&devlink_mutex);
3750 out_free:
3751 kfree(attrs);
3752 return err;
3753 }
3754
3755 struct devlink_info_req {
3756 struct sk_buff *msg;
3757 };
3758
3759 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
3760 {
3761 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
3762 }
3763 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
3764
3765 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
3766 {
3767 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
3768 }
3769 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
3770
3771 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
3772 const char *version_name,
3773 const char *version_value)
3774 {
3775 struct nlattr *nest;
3776 int err;
3777
3778 nest = nla_nest_start(req->msg, attr);
3779 if (!nest)
3780 return -EMSGSIZE;
3781
3782 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
3783 version_name);
3784 if (err)
3785 goto nla_put_failure;
3786
3787 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
3788 version_value);
3789 if (err)
3790 goto nla_put_failure;
3791
3792 nla_nest_end(req->msg, nest);
3793
3794 return 0;
3795
3796 nla_put_failure:
3797 nla_nest_cancel(req->msg, nest);
3798 return err;
3799 }
3800
3801 int devlink_info_version_fixed_put(struct devlink_info_req *req,
3802 const char *version_name,
3803 const char *version_value)
3804 {
3805 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
3806 version_name, version_value);
3807 }
3808 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
3809
3810 int devlink_info_version_stored_put(struct devlink_info_req *req,
3811 const char *version_name,
3812 const char *version_value)
3813 {
3814 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
3815 version_name, version_value);
3816 }
3817 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
3818
3819 int devlink_info_version_running_put(struct devlink_info_req *req,
3820 const char *version_name,
3821 const char *version_value)
3822 {
3823 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
3824 version_name, version_value);
3825 }
3826 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
3827
3828 static int
3829 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
3830 enum devlink_command cmd, u32 portid,
3831 u32 seq, int flags, struct netlink_ext_ack *extack)
3832 {
3833 struct devlink_info_req req;
3834 void *hdr;
3835 int err;
3836
3837 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3838 if (!hdr)
3839 return -EMSGSIZE;
3840
3841 err = -EMSGSIZE;
3842 if (devlink_nl_put_handle(msg, devlink))
3843 goto err_cancel_msg;
3844
3845 req.msg = msg;
3846 err = devlink->ops->info_get(devlink, &req, extack);
3847 if (err)
3848 goto err_cancel_msg;
3849
3850 genlmsg_end(msg, hdr);
3851 return 0;
3852
3853 err_cancel_msg:
3854 genlmsg_cancel(msg, hdr);
3855 return err;
3856 }
3857
3858 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
3859 struct genl_info *info)
3860 {
3861 struct devlink *devlink = info->user_ptr[0];
3862 struct sk_buff *msg;
3863 int err;
3864
3865 if (!devlink->ops->info_get)
3866 return -EOPNOTSUPP;
3867
3868 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3869 if (!msg)
3870 return -ENOMEM;
3871
3872 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
3873 info->snd_portid, info->snd_seq, 0,
3874 info->extack);
3875 if (err) {
3876 nlmsg_free(msg);
3877 return err;
3878 }
3879
3880 return genlmsg_reply(msg, info);
3881 }
3882
3883 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
3884 struct netlink_callback *cb)
3885 {
3886 struct devlink *devlink;
3887 int start = cb->args[0];
3888 int idx = 0;
3889 int err;
3890
3891 mutex_lock(&devlink_mutex);
3892 list_for_each_entry(devlink, &devlink_list, list) {
3893 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3894 continue;
3895 if (idx < start) {
3896 idx++;
3897 continue;
3898 }
3899
3900 mutex_lock(&devlink->lock);
3901 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
3902 NETLINK_CB(cb->skb).portid,
3903 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3904 cb->extack);
3905 mutex_unlock(&devlink->lock);
3906 if (err)
3907 break;
3908 idx++;
3909 }
3910 mutex_unlock(&devlink_mutex);
3911
3912 cb->args[0] = idx;
3913 return msg->len;
3914 }
3915
3916 struct devlink_fmsg_item {
3917 struct list_head list;
3918 int attrtype;
3919 u8 nla_type;
3920 u16 len;
3921 int value[0];
3922 };
3923
3924 struct devlink_fmsg {
3925 struct list_head item_list;
3926 };
3927
3928 static struct devlink_fmsg *devlink_fmsg_alloc(void)
3929 {
3930 struct devlink_fmsg *fmsg;
3931
3932 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
3933 if (!fmsg)
3934 return NULL;
3935
3936 INIT_LIST_HEAD(&fmsg->item_list);
3937
3938 return fmsg;
3939 }
3940
3941 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
3942 {
3943 struct devlink_fmsg_item *item, *tmp;
3944
3945 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
3946 list_del(&item->list);
3947 kfree(item);
3948 }
3949 kfree(fmsg);
3950 }
3951
3952 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
3953 int attrtype)
3954 {
3955 struct devlink_fmsg_item *item;
3956
3957 item = kzalloc(sizeof(*item), GFP_KERNEL);
3958 if (!item)
3959 return -ENOMEM;
3960
3961 item->attrtype = attrtype;
3962 list_add_tail(&item->list, &fmsg->item_list);
3963
3964 return 0;
3965 }
3966
3967 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
3968 {
3969 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
3970 }
3971 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
3972
3973 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
3974 {
3975 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
3976 }
3977
3978 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
3979 {
3980 return devlink_fmsg_nest_end(fmsg);
3981 }
3982 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
3983
3984 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
3985
3986 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
3987 {
3988 struct devlink_fmsg_item *item;
3989
3990 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
3991 return -EMSGSIZE;
3992
3993 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
3994 if (!item)
3995 return -ENOMEM;
3996
3997 item->nla_type = NLA_NUL_STRING;
3998 item->len = strlen(name) + 1;
3999 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4000 memcpy(&item->value, name, item->len);
4001 list_add_tail(&item->list, &fmsg->item_list);
4002
4003 return 0;
4004 }
4005
4006 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4007 {
4008 int err;
4009
4010 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4011 if (err)
4012 return err;
4013
4014 err = devlink_fmsg_put_name(fmsg, name);
4015 if (err)
4016 return err;
4017
4018 return 0;
4019 }
4020 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4021
4022 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4023 {
4024 return devlink_fmsg_nest_end(fmsg);
4025 }
4026 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4027
4028 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4029 const char *name)
4030 {
4031 int err;
4032
4033 err = devlink_fmsg_pair_nest_start(fmsg, name);
4034 if (err)
4035 return err;
4036
4037 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4038 if (err)
4039 return err;
4040
4041 return 0;
4042 }
4043 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4044
4045 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4046 {
4047 int err;
4048
4049 err = devlink_fmsg_nest_end(fmsg);
4050 if (err)
4051 return err;
4052
4053 err = devlink_fmsg_nest_end(fmsg);
4054 if (err)
4055 return err;
4056
4057 return 0;
4058 }
4059 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4060
4061 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4062 const void *value, u16 value_len,
4063 u8 value_nla_type)
4064 {
4065 struct devlink_fmsg_item *item;
4066
4067 if (value_len > DEVLINK_FMSG_MAX_SIZE)
4068 return -EMSGSIZE;
4069
4070 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4071 if (!item)
4072 return -ENOMEM;
4073
4074 item->nla_type = value_nla_type;
4075 item->len = value_len;
4076 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4077 memcpy(&item->value, value, item->len);
4078 list_add_tail(&item->list, &fmsg->item_list);
4079
4080 return 0;
4081 }
4082
4083 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4084 {
4085 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4086 }
4087 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4088
4089 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4090 {
4091 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4092 }
4093 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4094
4095 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4096 {
4097 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4098 }
4099 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4100
4101 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4102 {
4103 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4104 }
4105 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4106
4107 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4108 {
4109 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4110 NLA_NUL_STRING);
4111 }
4112 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4113
4114 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4115 u16 value_len)
4116 {
4117 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4118 }
4119 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4120
4121 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4122 bool value)
4123 {
4124 int err;
4125
4126 err = devlink_fmsg_pair_nest_start(fmsg, name);
4127 if (err)
4128 return err;
4129
4130 err = devlink_fmsg_bool_put(fmsg, value);
4131 if (err)
4132 return err;
4133
4134 err = devlink_fmsg_pair_nest_end(fmsg);
4135 if (err)
4136 return err;
4137
4138 return 0;
4139 }
4140 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4141
4142 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4143 u8 value)
4144 {
4145 int err;
4146
4147 err = devlink_fmsg_pair_nest_start(fmsg, name);
4148 if (err)
4149 return err;
4150
4151 err = devlink_fmsg_u8_put(fmsg, value);
4152 if (err)
4153 return err;
4154
4155 err = devlink_fmsg_pair_nest_end(fmsg);
4156 if (err)
4157 return err;
4158
4159 return 0;
4160 }
4161 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4162
4163 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4164 u32 value)
4165 {
4166 int err;
4167
4168 err = devlink_fmsg_pair_nest_start(fmsg, name);
4169 if (err)
4170 return err;
4171
4172 err = devlink_fmsg_u32_put(fmsg, value);
4173 if (err)
4174 return err;
4175
4176 err = devlink_fmsg_pair_nest_end(fmsg);
4177 if (err)
4178 return err;
4179
4180 return 0;
4181 }
4182 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4183
4184 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4185 u64 value)
4186 {
4187 int err;
4188
4189 err = devlink_fmsg_pair_nest_start(fmsg, name);
4190 if (err)
4191 return err;
4192
4193 err = devlink_fmsg_u64_put(fmsg, value);
4194 if (err)
4195 return err;
4196
4197 err = devlink_fmsg_pair_nest_end(fmsg);
4198 if (err)
4199 return err;
4200
4201 return 0;
4202 }
4203 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4204
4205 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4206 const char *value)
4207 {
4208 int err;
4209
4210 err = devlink_fmsg_pair_nest_start(fmsg, name);
4211 if (err)
4212 return err;
4213
4214 err = devlink_fmsg_string_put(fmsg, value);
4215 if (err)
4216 return err;
4217
4218 err = devlink_fmsg_pair_nest_end(fmsg);
4219 if (err)
4220 return err;
4221
4222 return 0;
4223 }
4224 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4225
4226 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4227 const void *value, u16 value_len)
4228 {
4229 int err;
4230
4231 err = devlink_fmsg_pair_nest_start(fmsg, name);
4232 if (err)
4233 return err;
4234
4235 err = devlink_fmsg_binary_put(fmsg, value, value_len);
4236 if (err)
4237 return err;
4238
4239 err = devlink_fmsg_pair_nest_end(fmsg);
4240 if (err)
4241 return err;
4242
4243 return 0;
4244 }
4245 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4246
4247 static int
4248 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4249 {
4250 switch (msg->nla_type) {
4251 case NLA_FLAG:
4252 case NLA_U8:
4253 case NLA_U32:
4254 case NLA_U64:
4255 case NLA_NUL_STRING:
4256 case NLA_BINARY:
4257 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4258 msg->nla_type);
4259 default:
4260 return -EINVAL;
4261 }
4262 }
4263
4264 static int
4265 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4266 {
4267 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4268 u8 tmp;
4269
4270 switch (msg->nla_type) {
4271 case NLA_FLAG:
4272 /* Always provide flag data, regardless of its value */
4273 tmp = *(bool *) msg->value;
4274
4275 return nla_put_u8(skb, attrtype, tmp);
4276 case NLA_U8:
4277 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4278 case NLA_U32:
4279 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4280 case NLA_U64:
4281 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4282 DEVLINK_ATTR_PAD);
4283 case NLA_NUL_STRING:
4284 return nla_put_string(skb, attrtype, (char *) &msg->value);
4285 case NLA_BINARY:
4286 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4287 default:
4288 return -EINVAL;
4289 }
4290 }
4291
4292 static int
4293 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4294 int *start)
4295 {
4296 struct devlink_fmsg_item *item;
4297 struct nlattr *fmsg_nlattr;
4298 int i = 0;
4299 int err;
4300
4301 fmsg_nlattr = nla_nest_start(skb, DEVLINK_ATTR_FMSG);
4302 if (!fmsg_nlattr)
4303 return -EMSGSIZE;
4304
4305 list_for_each_entry(item, &fmsg->item_list, list) {
4306 if (i < *start) {
4307 i++;
4308 continue;
4309 }
4310
4311 switch (item->attrtype) {
4312 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4313 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4314 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4315 case DEVLINK_ATTR_FMSG_NEST_END:
4316 err = nla_put_flag(skb, item->attrtype);
4317 break;
4318 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4319 err = devlink_fmsg_item_fill_type(item, skb);
4320 if (err)
4321 break;
4322 err = devlink_fmsg_item_fill_data(item, skb);
4323 break;
4324 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4325 err = nla_put_string(skb, item->attrtype,
4326 (char *) &item->value);
4327 break;
4328 default:
4329 err = -EINVAL;
4330 break;
4331 }
4332 if (!err)
4333 *start = ++i;
4334 else
4335 break;
4336 }
4337
4338 nla_nest_end(skb, fmsg_nlattr);
4339 return err;
4340 }
4341
4342 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4343 struct genl_info *info,
4344 enum devlink_command cmd, int flags)
4345 {
4346 struct nlmsghdr *nlh;
4347 struct sk_buff *skb;
4348 bool last = false;
4349 int index = 0;
4350 void *hdr;
4351 int err;
4352
4353 while (!last) {
4354 int tmp_index = index;
4355
4356 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4357 if (!skb)
4358 return -ENOMEM;
4359
4360 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4361 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4362 if (!hdr) {
4363 err = -EMSGSIZE;
4364 goto nla_put_failure;
4365 }
4366
4367 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4368 if (!err)
4369 last = true;
4370 else if (err != -EMSGSIZE || tmp_index == index)
4371 goto nla_put_failure;
4372
4373 genlmsg_end(skb, hdr);
4374 err = genlmsg_reply(skb, info);
4375 if (err)
4376 return err;
4377 }
4378
4379 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4380 if (!skb)
4381 return -ENOMEM;
4382 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4383 NLMSG_DONE, 0, flags | NLM_F_MULTI);
4384 if (!nlh) {
4385 err = -EMSGSIZE;
4386 goto nla_put_failure;
4387 }
4388
4389 return genlmsg_reply(skb, info);
4390
4391 nla_put_failure:
4392 nlmsg_free(skb);
4393 return err;
4394 }
4395
4396 struct devlink_health_reporter {
4397 struct list_head list;
4398 void *priv;
4399 const struct devlink_health_reporter_ops *ops;
4400 struct devlink *devlink;
4401 struct devlink_fmsg *dump_fmsg;
4402 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4403 u64 graceful_period;
4404 bool auto_recover;
4405 u8 health_state;
4406 u64 dump_ts;
4407 u64 error_count;
4408 u64 recovery_count;
4409 u64 last_recovery_ts;
4410 };
4411
4412 void *
4413 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4414 {
4415 return reporter->priv;
4416 }
4417 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4418
4419 static struct devlink_health_reporter *
4420 devlink_health_reporter_find_by_name(struct devlink *devlink,
4421 const char *reporter_name)
4422 {
4423 struct devlink_health_reporter *reporter;
4424
4425 list_for_each_entry(reporter, &devlink->reporter_list, list)
4426 if (!strcmp(reporter->ops->name, reporter_name))
4427 return reporter;
4428 return NULL;
4429 }
4430
4431 /**
4432 * devlink_health_reporter_create - create devlink health reporter
4433 *
4434 * @devlink: devlink
4435 * @ops: ops
4436 * @graceful_period: to avoid recovery loops, in msecs
4437 * @auto_recover: auto recover when error occurs
4438 * @priv: priv
4439 */
4440 struct devlink_health_reporter *
4441 devlink_health_reporter_create(struct devlink *devlink,
4442 const struct devlink_health_reporter_ops *ops,
4443 u64 graceful_period, bool auto_recover,
4444 void *priv)
4445 {
4446 struct devlink_health_reporter *reporter;
4447
4448 mutex_lock(&devlink->lock);
4449 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4450 reporter = ERR_PTR(-EEXIST);
4451 goto unlock;
4452 }
4453
4454 if (WARN_ON(auto_recover && !ops->recover) ||
4455 WARN_ON(graceful_period && !ops->recover)) {
4456 reporter = ERR_PTR(-EINVAL);
4457 goto unlock;
4458 }
4459
4460 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4461 if (!reporter) {
4462 reporter = ERR_PTR(-ENOMEM);
4463 goto unlock;
4464 }
4465
4466 reporter->priv = priv;
4467 reporter->ops = ops;
4468 reporter->devlink = devlink;
4469 reporter->graceful_period = graceful_period;
4470 reporter->auto_recover = auto_recover;
4471 mutex_init(&reporter->dump_lock);
4472 list_add_tail(&reporter->list, &devlink->reporter_list);
4473 unlock:
4474 mutex_unlock(&devlink->lock);
4475 return reporter;
4476 }
4477 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4478
4479 /**
4480 * devlink_health_reporter_destroy - destroy devlink health reporter
4481 *
4482 * @reporter: devlink health reporter to destroy
4483 */
4484 void
4485 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4486 {
4487 mutex_lock(&reporter->devlink->lock);
4488 list_del(&reporter->list);
4489 mutex_destroy(&reporter->dump_lock);
4490 mutex_unlock(&reporter->devlink->lock);
4491 if (reporter->dump_fmsg)
4492 devlink_fmsg_free(reporter->dump_fmsg);
4493 kfree(reporter);
4494 }
4495 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4496
4497 void
4498 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
4499 enum devlink_health_reporter_state state)
4500 {
4501 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
4502 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
4503 return;
4504
4505 if (reporter->health_state == state)
4506 return;
4507
4508 reporter->health_state = state;
4509 trace_devlink_health_reporter_state_update(reporter->devlink,
4510 reporter->ops->name, state);
4511 }
4512 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
4513
4514 static int
4515 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4516 void *priv_ctx)
4517 {
4518 int err;
4519
4520 if (!reporter->ops->recover)
4521 return -EOPNOTSUPP;
4522
4523 err = reporter->ops->recover(reporter, priv_ctx);
4524 if (err)
4525 return err;
4526
4527 reporter->recovery_count++;
4528 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4529 reporter->last_recovery_ts = jiffies;
4530
4531 return 0;
4532 }
4533
4534 static void
4535 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4536 {
4537 if (!reporter->dump_fmsg)
4538 return;
4539 devlink_fmsg_free(reporter->dump_fmsg);
4540 reporter->dump_fmsg = NULL;
4541 }
4542
4543 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4544 void *priv_ctx)
4545 {
4546 int err;
4547
4548 if (!reporter->ops->dump)
4549 return 0;
4550
4551 if (reporter->dump_fmsg)
4552 return 0;
4553
4554 reporter->dump_fmsg = devlink_fmsg_alloc();
4555 if (!reporter->dump_fmsg) {
4556 err = -ENOMEM;
4557 return err;
4558 }
4559
4560 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4561 if (err)
4562 goto dump_err;
4563
4564 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4565 priv_ctx);
4566 if (err)
4567 goto dump_err;
4568
4569 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
4570 if (err)
4571 goto dump_err;
4572
4573 reporter->dump_ts = jiffies;
4574
4575 return 0;
4576
4577 dump_err:
4578 devlink_health_dump_clear(reporter);
4579 return err;
4580 }
4581
4582 int devlink_health_report(struct devlink_health_reporter *reporter,
4583 const char *msg, void *priv_ctx)
4584 {
4585 enum devlink_health_reporter_state prev_health_state;
4586 struct devlink *devlink = reporter->devlink;
4587
4588 /* write a log message of the current error */
4589 WARN_ON(!msg);
4590 trace_devlink_health_report(devlink, reporter->ops->name, msg);
4591 reporter->error_count++;
4592 prev_health_state = reporter->health_state;
4593 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4594
4595 /* abort if the previous error wasn't recovered */
4596 if (reporter->auto_recover &&
4597 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
4598 jiffies - reporter->last_recovery_ts <
4599 msecs_to_jiffies(reporter->graceful_period))) {
4600 trace_devlink_health_recover_aborted(devlink,
4601 reporter->ops->name,
4602 reporter->health_state,
4603 jiffies -
4604 reporter->last_recovery_ts);
4605 return -ECANCELED;
4606 }
4607
4608 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4609
4610 mutex_lock(&reporter->dump_lock);
4611 /* store current dump of current error, for later analysis */
4612 devlink_health_do_dump(reporter, priv_ctx);
4613 mutex_unlock(&reporter->dump_lock);
4614
4615 if (reporter->auto_recover)
4616 return devlink_health_reporter_recover(reporter, priv_ctx);
4617
4618 return 0;
4619 }
4620 EXPORT_SYMBOL_GPL(devlink_health_report);
4621
4622 static struct devlink_health_reporter *
4623 devlink_health_reporter_get_from_info(struct devlink *devlink,
4624 struct genl_info *info)
4625 {
4626 char *reporter_name;
4627
4628 if (!info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
4629 return NULL;
4630
4631 reporter_name =
4632 nla_data(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
4633 return devlink_health_reporter_find_by_name(devlink, reporter_name);
4634 }
4635
4636 static int
4637 devlink_nl_health_reporter_fill(struct sk_buff *msg,
4638 struct devlink *devlink,
4639 struct devlink_health_reporter *reporter,
4640 enum devlink_command cmd, u32 portid,
4641 u32 seq, int flags)
4642 {
4643 struct nlattr *reporter_attr;
4644 void *hdr;
4645
4646 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4647 if (!hdr)
4648 return -EMSGSIZE;
4649
4650 if (devlink_nl_put_handle(msg, devlink))
4651 goto genlmsg_cancel;
4652
4653 reporter_attr = nla_nest_start(msg, DEVLINK_ATTR_HEALTH_REPORTER);
4654 if (!reporter_attr)
4655 goto genlmsg_cancel;
4656 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
4657 reporter->ops->name))
4658 goto reporter_nest_cancel;
4659 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
4660 reporter->health_state))
4661 goto reporter_nest_cancel;
4662 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
4663 reporter->error_count, DEVLINK_ATTR_PAD))
4664 goto reporter_nest_cancel;
4665 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
4666 reporter->recovery_count, DEVLINK_ATTR_PAD))
4667 goto reporter_nest_cancel;
4668 if (reporter->ops->recover &&
4669 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
4670 reporter->graceful_period,
4671 DEVLINK_ATTR_PAD))
4672 goto reporter_nest_cancel;
4673 if (reporter->ops->recover &&
4674 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
4675 reporter->auto_recover))
4676 goto reporter_nest_cancel;
4677 if (reporter->dump_fmsg &&
4678 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
4679 jiffies_to_msecs(reporter->dump_ts),
4680 DEVLINK_ATTR_PAD))
4681 goto reporter_nest_cancel;
4682
4683 nla_nest_end(msg, reporter_attr);
4684 genlmsg_end(msg, hdr);
4685 return 0;
4686
4687 reporter_nest_cancel:
4688 nla_nest_end(msg, reporter_attr);
4689 genlmsg_cancel:
4690 genlmsg_cancel(msg, hdr);
4691 return -EMSGSIZE;
4692 }
4693
4694 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
4695 struct genl_info *info)
4696 {
4697 struct devlink *devlink = info->user_ptr[0];
4698 struct devlink_health_reporter *reporter;
4699 struct sk_buff *msg;
4700 int err;
4701
4702 reporter = devlink_health_reporter_get_from_info(devlink, info);
4703 if (!reporter)
4704 return -EINVAL;
4705
4706 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4707 if (!msg)
4708 return -ENOMEM;
4709
4710 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
4711 DEVLINK_CMD_HEALTH_REPORTER_GET,
4712 info->snd_portid, info->snd_seq,
4713 0);
4714 if (err) {
4715 nlmsg_free(msg);
4716 return err;
4717 }
4718
4719 return genlmsg_reply(msg, info);
4720 }
4721
4722 static int
4723 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
4724 struct netlink_callback *cb)
4725 {
4726 struct devlink_health_reporter *reporter;
4727 struct devlink *devlink;
4728 int start = cb->args[0];
4729 int idx = 0;
4730 int err;
4731
4732 mutex_lock(&devlink_mutex);
4733 list_for_each_entry(devlink, &devlink_list, list) {
4734 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4735 continue;
4736 mutex_lock(&devlink->lock);
4737 list_for_each_entry(reporter, &devlink->reporter_list,
4738 list) {
4739 if (idx < start) {
4740 idx++;
4741 continue;
4742 }
4743 err = devlink_nl_health_reporter_fill(msg, devlink,
4744 reporter,
4745 DEVLINK_CMD_HEALTH_REPORTER_GET,
4746 NETLINK_CB(cb->skb).portid,
4747 cb->nlh->nlmsg_seq,
4748 NLM_F_MULTI);
4749 if (err) {
4750 mutex_unlock(&devlink->lock);
4751 goto out;
4752 }
4753 idx++;
4754 }
4755 mutex_unlock(&devlink->lock);
4756 }
4757 out:
4758 mutex_unlock(&devlink_mutex);
4759
4760 cb->args[0] = idx;
4761 return msg->len;
4762 }
4763
4764 static int
4765 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
4766 struct genl_info *info)
4767 {
4768 struct devlink *devlink = info->user_ptr[0];
4769 struct devlink_health_reporter *reporter;
4770
4771 reporter = devlink_health_reporter_get_from_info(devlink, info);
4772 if (!reporter)
4773 return -EINVAL;
4774
4775 if (!reporter->ops->recover &&
4776 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
4777 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
4778 return -EOPNOTSUPP;
4779
4780 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
4781 reporter->graceful_period =
4782 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
4783
4784 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
4785 reporter->auto_recover =
4786 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
4787
4788 return 0;
4789 }
4790
4791 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
4792 struct genl_info *info)
4793 {
4794 struct devlink *devlink = info->user_ptr[0];
4795 struct devlink_health_reporter *reporter;
4796
4797 reporter = devlink_health_reporter_get_from_info(devlink, info);
4798 if (!reporter)
4799 return -EINVAL;
4800
4801 return devlink_health_reporter_recover(reporter, NULL);
4802 }
4803
4804 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
4805 struct genl_info *info)
4806 {
4807 struct devlink *devlink = info->user_ptr[0];
4808 struct devlink_health_reporter *reporter;
4809 struct devlink_fmsg *fmsg;
4810 int err;
4811
4812 reporter = devlink_health_reporter_get_from_info(devlink, info);
4813 if (!reporter)
4814 return -EINVAL;
4815
4816 if (!reporter->ops->diagnose)
4817 return -EOPNOTSUPP;
4818
4819 fmsg = devlink_fmsg_alloc();
4820 if (!fmsg)
4821 return -ENOMEM;
4822
4823 err = devlink_fmsg_obj_nest_start(fmsg);
4824 if (err)
4825 goto out;
4826
4827 err = reporter->ops->diagnose(reporter, fmsg);
4828 if (err)
4829 goto out;
4830
4831 err = devlink_fmsg_obj_nest_end(fmsg);
4832 if (err)
4833 goto out;
4834
4835 err = devlink_fmsg_snd(fmsg, info,
4836 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
4837
4838 out:
4839 devlink_fmsg_free(fmsg);
4840 return err;
4841 }
4842
4843 static int devlink_nl_cmd_health_reporter_dump_get_doit(struct sk_buff *skb,
4844 struct genl_info *info)
4845 {
4846 struct devlink *devlink = info->user_ptr[0];
4847 struct devlink_health_reporter *reporter;
4848 int err;
4849
4850 reporter = devlink_health_reporter_get_from_info(devlink, info);
4851 if (!reporter)
4852 return -EINVAL;
4853
4854 if (!reporter->ops->dump)
4855 return -EOPNOTSUPP;
4856
4857 mutex_lock(&reporter->dump_lock);
4858 err = devlink_health_do_dump(reporter, NULL);
4859 if (err)
4860 goto out;
4861
4862 err = devlink_fmsg_snd(reporter->dump_fmsg, info,
4863 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET, 0);
4864
4865 out:
4866 mutex_unlock(&reporter->dump_lock);
4867 return err;
4868 }
4869
4870 static int
4871 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
4872 struct genl_info *info)
4873 {
4874 struct devlink *devlink = info->user_ptr[0];
4875 struct devlink_health_reporter *reporter;
4876
4877 reporter = devlink_health_reporter_get_from_info(devlink, info);
4878 if (!reporter)
4879 return -EINVAL;
4880
4881 if (!reporter->ops->dump)
4882 return -EOPNOTSUPP;
4883
4884 mutex_lock(&reporter->dump_lock);
4885 devlink_health_dump_clear(reporter);
4886 mutex_unlock(&reporter->dump_lock);
4887 return 0;
4888 }
4889
4890 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
4891 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
4892 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
4893 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
4894 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
4895 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
4896 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
4897 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
4898 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
4899 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
4900 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
4901 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
4902 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
4903 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
4904 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
4905 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
4906 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
4907 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
4908 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
4909 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
4910 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
4911 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
4912 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
4913 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
4914 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
4915 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
4916 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
4917 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
4918 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
4919 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
4920 };
4921
4922 static const struct genl_ops devlink_nl_ops[] = {
4923 {
4924 .cmd = DEVLINK_CMD_GET,
4925 .doit = devlink_nl_cmd_get_doit,
4926 .dumpit = devlink_nl_cmd_get_dumpit,
4927 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
4928 /* can be retrieved by unprivileged users */
4929 },
4930 {
4931 .cmd = DEVLINK_CMD_PORT_GET,
4932 .doit = devlink_nl_cmd_port_get_doit,
4933 .dumpit = devlink_nl_cmd_port_get_dumpit,
4934 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
4935 /* can be retrieved by unprivileged users */
4936 },
4937 {
4938 .cmd = DEVLINK_CMD_PORT_SET,
4939 .doit = devlink_nl_cmd_port_set_doit,
4940 .flags = GENL_ADMIN_PERM,
4941 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
4942 },
4943 {
4944 .cmd = DEVLINK_CMD_PORT_SPLIT,
4945 .doit = devlink_nl_cmd_port_split_doit,
4946 .flags = GENL_ADMIN_PERM,
4947 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4948 DEVLINK_NL_FLAG_NO_LOCK,
4949 },
4950 {
4951 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
4952 .doit = devlink_nl_cmd_port_unsplit_doit,
4953 .flags = GENL_ADMIN_PERM,
4954 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4955 DEVLINK_NL_FLAG_NO_LOCK,
4956 },
4957 {
4958 .cmd = DEVLINK_CMD_SB_GET,
4959 .doit = devlink_nl_cmd_sb_get_doit,
4960 .dumpit = devlink_nl_cmd_sb_get_dumpit,
4961 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4962 DEVLINK_NL_FLAG_NEED_SB,
4963 /* can be retrieved by unprivileged users */
4964 },
4965 {
4966 .cmd = DEVLINK_CMD_SB_POOL_GET,
4967 .doit = devlink_nl_cmd_sb_pool_get_doit,
4968 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
4969 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4970 DEVLINK_NL_FLAG_NEED_SB,
4971 /* can be retrieved by unprivileged users */
4972 },
4973 {
4974 .cmd = DEVLINK_CMD_SB_POOL_SET,
4975 .doit = devlink_nl_cmd_sb_pool_set_doit,
4976 .flags = GENL_ADMIN_PERM,
4977 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4978 DEVLINK_NL_FLAG_NEED_SB,
4979 },
4980 {
4981 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
4982 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
4983 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
4984 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
4985 DEVLINK_NL_FLAG_NEED_SB,
4986 /* can be retrieved by unprivileged users */
4987 },
4988 {
4989 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
4990 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
4991 .flags = GENL_ADMIN_PERM,
4992 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
4993 DEVLINK_NL_FLAG_NEED_SB,
4994 },
4995 {
4996 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
4997 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
4998 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
4999 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5000 DEVLINK_NL_FLAG_NEED_SB,
5001 /* can be retrieved by unprivileged users */
5002 },
5003 {
5004 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
5005 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
5006 .flags = GENL_ADMIN_PERM,
5007 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5008 DEVLINK_NL_FLAG_NEED_SB,
5009 },
5010 {
5011 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
5012 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
5013 .flags = GENL_ADMIN_PERM,
5014 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5015 DEVLINK_NL_FLAG_NEED_SB,
5016 },
5017 {
5018 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
5019 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
5020 .flags = GENL_ADMIN_PERM,
5021 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5022 DEVLINK_NL_FLAG_NEED_SB,
5023 },
5024 {
5025 .cmd = DEVLINK_CMD_ESWITCH_GET,
5026 .doit = devlink_nl_cmd_eswitch_get_doit,
5027 .flags = GENL_ADMIN_PERM,
5028 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5029 },
5030 {
5031 .cmd = DEVLINK_CMD_ESWITCH_SET,
5032 .doit = devlink_nl_cmd_eswitch_set_doit,
5033 .flags = GENL_ADMIN_PERM,
5034 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5035 DEVLINK_NL_FLAG_NO_LOCK,
5036 },
5037 {
5038 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
5039 .doit = devlink_nl_cmd_dpipe_table_get,
5040 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5041 /* can be retrieved by unprivileged users */
5042 },
5043 {
5044 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
5045 .doit = devlink_nl_cmd_dpipe_entries_get,
5046 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5047 /* can be retrieved by unprivileged users */
5048 },
5049 {
5050 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
5051 .doit = devlink_nl_cmd_dpipe_headers_get,
5052 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5053 /* can be retrieved by unprivileged users */
5054 },
5055 {
5056 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
5057 .doit = devlink_nl_cmd_dpipe_table_counters_set,
5058 .flags = GENL_ADMIN_PERM,
5059 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5060 },
5061 {
5062 .cmd = DEVLINK_CMD_RESOURCE_SET,
5063 .doit = devlink_nl_cmd_resource_set,
5064 .flags = GENL_ADMIN_PERM,
5065 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5066 },
5067 {
5068 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
5069 .doit = devlink_nl_cmd_resource_dump,
5070 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5071 /* can be retrieved by unprivileged users */
5072 },
5073 {
5074 .cmd = DEVLINK_CMD_RELOAD,
5075 .doit = devlink_nl_cmd_reload,
5076 .flags = GENL_ADMIN_PERM,
5077 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5078 DEVLINK_NL_FLAG_NO_LOCK,
5079 },
5080 {
5081 .cmd = DEVLINK_CMD_PARAM_GET,
5082 .doit = devlink_nl_cmd_param_get_doit,
5083 .dumpit = devlink_nl_cmd_param_get_dumpit,
5084 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5085 /* can be retrieved by unprivileged users */
5086 },
5087 {
5088 .cmd = DEVLINK_CMD_PARAM_SET,
5089 .doit = devlink_nl_cmd_param_set_doit,
5090 .flags = GENL_ADMIN_PERM,
5091 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5092 },
5093 {
5094 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
5095 .doit = devlink_nl_cmd_port_param_get_doit,
5096 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
5097 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5098 /* can be retrieved by unprivileged users */
5099 },
5100 {
5101 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
5102 .doit = devlink_nl_cmd_port_param_set_doit,
5103 .flags = GENL_ADMIN_PERM,
5104 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5105 },
5106 {
5107 .cmd = DEVLINK_CMD_REGION_GET,
5108 .doit = devlink_nl_cmd_region_get_doit,
5109 .dumpit = devlink_nl_cmd_region_get_dumpit,
5110 .flags = GENL_ADMIN_PERM,
5111 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5112 },
5113 {
5114 .cmd = DEVLINK_CMD_REGION_DEL,
5115 .doit = devlink_nl_cmd_region_del,
5116 .flags = GENL_ADMIN_PERM,
5117 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5118 },
5119 {
5120 .cmd = DEVLINK_CMD_REGION_READ,
5121 .dumpit = devlink_nl_cmd_region_read_dumpit,
5122 .flags = GENL_ADMIN_PERM,
5123 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5124 },
5125 {
5126 .cmd = DEVLINK_CMD_INFO_GET,
5127 .doit = devlink_nl_cmd_info_get_doit,
5128 .dumpit = devlink_nl_cmd_info_get_dumpit,
5129 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5130 /* can be retrieved by unprivileged users */
5131 },
5132 {
5133 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
5134 .doit = devlink_nl_cmd_health_reporter_get_doit,
5135 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
5136 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5137 /* can be retrieved by unprivileged users */
5138 },
5139 {
5140 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
5141 .doit = devlink_nl_cmd_health_reporter_set_doit,
5142 .flags = GENL_ADMIN_PERM,
5143 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5144 },
5145 {
5146 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
5147 .doit = devlink_nl_cmd_health_reporter_recover_doit,
5148 .flags = GENL_ADMIN_PERM,
5149 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5150 },
5151 {
5152 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
5153 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
5154 .flags = GENL_ADMIN_PERM,
5155 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5156 },
5157 {
5158 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
5159 .doit = devlink_nl_cmd_health_reporter_dump_get_doit,
5160 .flags = GENL_ADMIN_PERM,
5161 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5162 DEVLINK_NL_FLAG_NO_LOCK,
5163 },
5164 {
5165 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
5166 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
5167 .flags = GENL_ADMIN_PERM,
5168 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5169 DEVLINK_NL_FLAG_NO_LOCK,
5170 },
5171 {
5172 .cmd = DEVLINK_CMD_FLASH_UPDATE,
5173 .doit = devlink_nl_cmd_flash_update,
5174 .flags = GENL_ADMIN_PERM,
5175 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5176 },
5177 };
5178
5179 static struct genl_family devlink_nl_family __ro_after_init = {
5180 .name = DEVLINK_GENL_NAME,
5181 .version = DEVLINK_GENL_VERSION,
5182 .maxattr = DEVLINK_ATTR_MAX,
5183 .policy = devlink_nl_policy,
5184 .netnsok = true,
5185 .pre_doit = devlink_nl_pre_doit,
5186 .post_doit = devlink_nl_post_doit,
5187 .module = THIS_MODULE,
5188 .ops = devlink_nl_ops,
5189 .n_ops = ARRAY_SIZE(devlink_nl_ops),
5190 .mcgrps = devlink_nl_mcgrps,
5191 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
5192 };
5193
5194 /**
5195 * devlink_alloc - Allocate new devlink instance resources
5196 *
5197 * @ops: ops
5198 * @priv_size: size of user private data
5199 *
5200 * Allocate new devlink instance resources, including devlink index
5201 * and name.
5202 */
5203 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
5204 {
5205 struct devlink *devlink;
5206
5207 if (WARN_ON(!ops))
5208 return NULL;
5209
5210 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
5211 if (!devlink)
5212 return NULL;
5213 devlink->ops = ops;
5214 devlink_net_set(devlink, &init_net);
5215 INIT_LIST_HEAD(&devlink->port_list);
5216 INIT_LIST_HEAD(&devlink->sb_list);
5217 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
5218 INIT_LIST_HEAD(&devlink->resource_list);
5219 INIT_LIST_HEAD(&devlink->param_list);
5220 INIT_LIST_HEAD(&devlink->region_list);
5221 INIT_LIST_HEAD(&devlink->reporter_list);
5222 mutex_init(&devlink->lock);
5223 return devlink;
5224 }
5225 EXPORT_SYMBOL_GPL(devlink_alloc);
5226
5227 /**
5228 * devlink_register - Register devlink instance
5229 *
5230 * @devlink: devlink
5231 * @dev: parent device
5232 */
5233 int devlink_register(struct devlink *devlink, struct device *dev)
5234 {
5235 mutex_lock(&devlink_mutex);
5236 devlink->dev = dev;
5237 list_add_tail(&devlink->list, &devlink_list);
5238 devlink_notify(devlink, DEVLINK_CMD_NEW);
5239 mutex_unlock(&devlink_mutex);
5240 return 0;
5241 }
5242 EXPORT_SYMBOL_GPL(devlink_register);
5243
5244 /**
5245 * devlink_unregister - Unregister devlink instance
5246 *
5247 * @devlink: devlink
5248 */
5249 void devlink_unregister(struct devlink *devlink)
5250 {
5251 mutex_lock(&devlink_mutex);
5252 devlink_notify(devlink, DEVLINK_CMD_DEL);
5253 list_del(&devlink->list);
5254 mutex_unlock(&devlink_mutex);
5255 }
5256 EXPORT_SYMBOL_GPL(devlink_unregister);
5257
5258 /**
5259 * devlink_free - Free devlink instance resources
5260 *
5261 * @devlink: devlink
5262 */
5263 void devlink_free(struct devlink *devlink)
5264 {
5265 mutex_destroy(&devlink->lock);
5266 WARN_ON(!list_empty(&devlink->reporter_list));
5267 WARN_ON(!list_empty(&devlink->region_list));
5268 WARN_ON(!list_empty(&devlink->param_list));
5269 WARN_ON(!list_empty(&devlink->resource_list));
5270 WARN_ON(!list_empty(&devlink->dpipe_table_list));
5271 WARN_ON(!list_empty(&devlink->sb_list));
5272 WARN_ON(!list_empty(&devlink->port_list));
5273
5274 kfree(devlink);
5275 }
5276 EXPORT_SYMBOL_GPL(devlink_free);
5277
5278 /**
5279 * devlink_port_register - Register devlink port
5280 *
5281 * @devlink: devlink
5282 * @devlink_port: devlink port
5283 * @port_index: driver-specific numerical identifier of the port
5284 *
5285 * Register devlink port with provided port index. User can use
5286 * any indexing, even hw-related one. devlink_port structure
5287 * is convenient to be embedded inside user driver private structure.
5288 * Note that the caller should take care of zeroing the devlink_port
5289 * structure.
5290 */
5291 int devlink_port_register(struct devlink *devlink,
5292 struct devlink_port *devlink_port,
5293 unsigned int port_index)
5294 {
5295 mutex_lock(&devlink->lock);
5296 if (devlink_port_index_exists(devlink, port_index)) {
5297 mutex_unlock(&devlink->lock);
5298 return -EEXIST;
5299 }
5300 devlink_port->devlink = devlink;
5301 devlink_port->index = port_index;
5302 devlink_port->registered = true;
5303 list_add_tail(&devlink_port->list, &devlink->port_list);
5304 INIT_LIST_HEAD(&devlink_port->param_list);
5305 mutex_unlock(&devlink->lock);
5306 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
5307 return 0;
5308 }
5309 EXPORT_SYMBOL_GPL(devlink_port_register);
5310
5311 /**
5312 * devlink_port_unregister - Unregister devlink port
5313 *
5314 * @devlink_port: devlink port
5315 */
5316 void devlink_port_unregister(struct devlink_port *devlink_port)
5317 {
5318 struct devlink *devlink = devlink_port->devlink;
5319
5320 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
5321 mutex_lock(&devlink->lock);
5322 list_del(&devlink_port->list);
5323 mutex_unlock(&devlink->lock);
5324 }
5325 EXPORT_SYMBOL_GPL(devlink_port_unregister);
5326
5327 static void __devlink_port_type_set(struct devlink_port *devlink_port,
5328 enum devlink_port_type type,
5329 void *type_dev)
5330 {
5331 devlink_port->type = type;
5332 devlink_port->type_dev = type_dev;
5333 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
5334 }
5335
5336 /**
5337 * devlink_port_type_eth_set - Set port type to Ethernet
5338 *
5339 * @devlink_port: devlink port
5340 * @netdev: related netdevice
5341 */
5342 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
5343 struct net_device *netdev)
5344 {
5345 return __devlink_port_type_set(devlink_port,
5346 DEVLINK_PORT_TYPE_ETH, netdev);
5347 }
5348 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
5349
5350 /**
5351 * devlink_port_type_ib_set - Set port type to InfiniBand
5352 *
5353 * @devlink_port: devlink port
5354 * @ibdev: related IB device
5355 */
5356 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
5357 struct ib_device *ibdev)
5358 {
5359 return __devlink_port_type_set(devlink_port,
5360 DEVLINK_PORT_TYPE_IB, ibdev);
5361 }
5362 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
5363
5364 /**
5365 * devlink_port_type_clear - Clear port type
5366 *
5367 * @devlink_port: devlink port
5368 */
5369 void devlink_port_type_clear(struct devlink_port *devlink_port)
5370 {
5371 return __devlink_port_type_set(devlink_port,
5372 DEVLINK_PORT_TYPE_NOTSET, NULL);
5373 }
5374 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
5375
5376 /**
5377 * devlink_port_attrs_set - Set port attributes
5378 *
5379 * @devlink_port: devlink port
5380 * @flavour: flavour of the port
5381 * @port_number: number of the port that is facing user, for example
5382 * the front panel port number
5383 * @split: indicates if this is split port
5384 * @split_subport_number: if the port is split, this is the number
5385 * of subport.
5386 */
5387 void devlink_port_attrs_set(struct devlink_port *devlink_port,
5388 enum devlink_port_flavour flavour,
5389 u32 port_number, bool split,
5390 u32 split_subport_number)
5391 {
5392 struct devlink_port_attrs *attrs = &devlink_port->attrs;
5393
5394 attrs->set = true;
5395 attrs->flavour = flavour;
5396 attrs->port_number = port_number;
5397 attrs->split = split;
5398 attrs->split_subport_number = split_subport_number;
5399 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
5400 }
5401 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
5402
5403 int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
5404 char *name, size_t len)
5405 {
5406 struct devlink_port_attrs *attrs = &devlink_port->attrs;
5407 int n = 0;
5408
5409 if (!attrs->set)
5410 return -EOPNOTSUPP;
5411
5412 switch (attrs->flavour) {
5413 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
5414 if (!attrs->split)
5415 n = snprintf(name, len, "p%u", attrs->port_number);
5416 else
5417 n = snprintf(name, len, "p%us%u", attrs->port_number,
5418 attrs->split_subport_number);
5419 break;
5420 case DEVLINK_PORT_FLAVOUR_CPU:
5421 case DEVLINK_PORT_FLAVOUR_DSA:
5422 /* As CPU and DSA ports do not have a netdevice associated
5423 * case should not ever happen.
5424 */
5425 WARN_ON(1);
5426 return -EINVAL;
5427 }
5428
5429 if (n >= len)
5430 return -EINVAL;
5431
5432 return 0;
5433 }
5434 EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
5435
5436 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
5437 u32 size, u16 ingress_pools_count,
5438 u16 egress_pools_count, u16 ingress_tc_count,
5439 u16 egress_tc_count)
5440 {
5441 struct devlink_sb *devlink_sb;
5442 int err = 0;
5443
5444 mutex_lock(&devlink->lock);
5445 if (devlink_sb_index_exists(devlink, sb_index)) {
5446 err = -EEXIST;
5447 goto unlock;
5448 }
5449
5450 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
5451 if (!devlink_sb) {
5452 err = -ENOMEM;
5453 goto unlock;
5454 }
5455 devlink_sb->index = sb_index;
5456 devlink_sb->size = size;
5457 devlink_sb->ingress_pools_count = ingress_pools_count;
5458 devlink_sb->egress_pools_count = egress_pools_count;
5459 devlink_sb->ingress_tc_count = ingress_tc_count;
5460 devlink_sb->egress_tc_count = egress_tc_count;
5461 list_add_tail(&devlink_sb->list, &devlink->sb_list);
5462 unlock:
5463 mutex_unlock(&devlink->lock);
5464 return err;
5465 }
5466 EXPORT_SYMBOL_GPL(devlink_sb_register);
5467
5468 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
5469 {
5470 struct devlink_sb *devlink_sb;
5471
5472 mutex_lock(&devlink->lock);
5473 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
5474 WARN_ON(!devlink_sb);
5475 list_del(&devlink_sb->list);
5476 mutex_unlock(&devlink->lock);
5477 kfree(devlink_sb);
5478 }
5479 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
5480
5481 /**
5482 * devlink_dpipe_headers_register - register dpipe headers
5483 *
5484 * @devlink: devlink
5485 * @dpipe_headers: dpipe header array
5486 *
5487 * Register the headers supported by hardware.
5488 */
5489 int devlink_dpipe_headers_register(struct devlink *devlink,
5490 struct devlink_dpipe_headers *dpipe_headers)
5491 {
5492 mutex_lock(&devlink->lock);
5493 devlink->dpipe_headers = dpipe_headers;
5494 mutex_unlock(&devlink->lock);
5495 return 0;
5496 }
5497 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
5498
5499 /**
5500 * devlink_dpipe_headers_unregister - unregister dpipe headers
5501 *
5502 * @devlink: devlink
5503 *
5504 * Unregister the headers supported by hardware.
5505 */
5506 void devlink_dpipe_headers_unregister(struct devlink *devlink)
5507 {
5508 mutex_lock(&devlink->lock);
5509 devlink->dpipe_headers = NULL;
5510 mutex_unlock(&devlink->lock);
5511 }
5512 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
5513
5514 /**
5515 * devlink_dpipe_table_counter_enabled - check if counter allocation
5516 * required
5517 * @devlink: devlink
5518 * @table_name: tables name
5519 *
5520 * Used by driver to check if counter allocation is required.
5521 * After counter allocation is turned on the table entries
5522 * are updated to include counter statistics.
5523 *
5524 * After that point on the driver must respect the counter
5525 * state so that each entry added to the table is added
5526 * with a counter.
5527 */
5528 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
5529 const char *table_name)
5530 {
5531 struct devlink_dpipe_table *table;
5532 bool enabled;
5533
5534 rcu_read_lock();
5535 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
5536 table_name);
5537 enabled = false;
5538 if (table)
5539 enabled = table->counters_enabled;
5540 rcu_read_unlock();
5541 return enabled;
5542 }
5543 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
5544
5545 /**
5546 * devlink_dpipe_table_register - register dpipe table
5547 *
5548 * @devlink: devlink
5549 * @table_name: table name
5550 * @table_ops: table ops
5551 * @priv: priv
5552 * @counter_control_extern: external control for counters
5553 */
5554 int devlink_dpipe_table_register(struct devlink *devlink,
5555 const char *table_name,
5556 struct devlink_dpipe_table_ops *table_ops,
5557 void *priv, bool counter_control_extern)
5558 {
5559 struct devlink_dpipe_table *table;
5560
5561 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
5562 return -EEXIST;
5563
5564 if (WARN_ON(!table_ops->size_get))
5565 return -EINVAL;
5566
5567 table = kzalloc(sizeof(*table), GFP_KERNEL);
5568 if (!table)
5569 return -ENOMEM;
5570
5571 table->name = table_name;
5572 table->table_ops = table_ops;
5573 table->priv = priv;
5574 table->counter_control_extern = counter_control_extern;
5575
5576 mutex_lock(&devlink->lock);
5577 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
5578 mutex_unlock(&devlink->lock);
5579 return 0;
5580 }
5581 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
5582
5583 /**
5584 * devlink_dpipe_table_unregister - unregister dpipe table
5585 *
5586 * @devlink: devlink
5587 * @table_name: table name
5588 */
5589 void devlink_dpipe_table_unregister(struct devlink *devlink,
5590 const char *table_name)
5591 {
5592 struct devlink_dpipe_table *table;
5593
5594 mutex_lock(&devlink->lock);
5595 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
5596 table_name);
5597 if (!table)
5598 goto unlock;
5599 list_del_rcu(&table->list);
5600 mutex_unlock(&devlink->lock);
5601 kfree_rcu(table, rcu);
5602 return;
5603 unlock:
5604 mutex_unlock(&devlink->lock);
5605 }
5606 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
5607
5608 /**
5609 * devlink_resource_register - devlink resource register
5610 *
5611 * @devlink: devlink
5612 * @resource_name: resource's name
5613 * @resource_size: resource's size
5614 * @resource_id: resource's id
5615 * @parent_resource_id: resource's parent id
5616 * @size_params: size parameters
5617 */
5618 int devlink_resource_register(struct devlink *devlink,
5619 const char *resource_name,
5620 u64 resource_size,
5621 u64 resource_id,
5622 u64 parent_resource_id,
5623 const struct devlink_resource_size_params *size_params)
5624 {
5625 struct devlink_resource *resource;
5626 struct list_head *resource_list;
5627 bool top_hierarchy;
5628 int err = 0;
5629
5630 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
5631
5632 mutex_lock(&devlink->lock);
5633 resource = devlink_resource_find(devlink, NULL, resource_id);
5634 if (resource) {
5635 err = -EINVAL;
5636 goto out;
5637 }
5638
5639 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
5640 if (!resource) {
5641 err = -ENOMEM;
5642 goto out;
5643 }
5644
5645 if (top_hierarchy) {
5646 resource_list = &devlink->resource_list;
5647 } else {
5648 struct devlink_resource *parent_resource;
5649
5650 parent_resource = devlink_resource_find(devlink, NULL,
5651 parent_resource_id);
5652 if (parent_resource) {
5653 resource_list = &parent_resource->resource_list;
5654 resource->parent = parent_resource;
5655 } else {
5656 kfree(resource);
5657 err = -EINVAL;
5658 goto out;
5659 }
5660 }
5661
5662 resource->name = resource_name;
5663 resource->size = resource_size;
5664 resource->size_new = resource_size;
5665 resource->id = resource_id;
5666 resource->size_valid = true;
5667 memcpy(&resource->size_params, size_params,
5668 sizeof(resource->size_params));
5669 INIT_LIST_HEAD(&resource->resource_list);
5670 list_add_tail(&resource->list, resource_list);
5671 out:
5672 mutex_unlock(&devlink->lock);
5673 return err;
5674 }
5675 EXPORT_SYMBOL_GPL(devlink_resource_register);
5676
5677 /**
5678 * devlink_resources_unregister - free all resources
5679 *
5680 * @devlink: devlink
5681 * @resource: resource
5682 */
5683 void devlink_resources_unregister(struct devlink *devlink,
5684 struct devlink_resource *resource)
5685 {
5686 struct devlink_resource *tmp, *child_resource;
5687 struct list_head *resource_list;
5688
5689 if (resource)
5690 resource_list = &resource->resource_list;
5691 else
5692 resource_list = &devlink->resource_list;
5693
5694 if (!resource)
5695 mutex_lock(&devlink->lock);
5696
5697 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
5698 devlink_resources_unregister(devlink, child_resource);
5699 list_del(&child_resource->list);
5700 kfree(child_resource);
5701 }
5702
5703 if (!resource)
5704 mutex_unlock(&devlink->lock);
5705 }
5706 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
5707
5708 /**
5709 * devlink_resource_size_get - get and update size
5710 *
5711 * @devlink: devlink
5712 * @resource_id: the requested resource id
5713 * @p_resource_size: ptr to update
5714 */
5715 int devlink_resource_size_get(struct devlink *devlink,
5716 u64 resource_id,
5717 u64 *p_resource_size)
5718 {
5719 struct devlink_resource *resource;
5720 int err = 0;
5721
5722 mutex_lock(&devlink->lock);
5723 resource = devlink_resource_find(devlink, NULL, resource_id);
5724 if (!resource) {
5725 err = -EINVAL;
5726 goto out;
5727 }
5728 *p_resource_size = resource->size_new;
5729 resource->size = resource->size_new;
5730 out:
5731 mutex_unlock(&devlink->lock);
5732 return err;
5733 }
5734 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
5735
5736 /**
5737 * devlink_dpipe_table_resource_set - set the resource id
5738 *
5739 * @devlink: devlink
5740 * @table_name: table name
5741 * @resource_id: resource id
5742 * @resource_units: number of resource's units consumed per table's entry
5743 */
5744 int devlink_dpipe_table_resource_set(struct devlink *devlink,
5745 const char *table_name, u64 resource_id,
5746 u64 resource_units)
5747 {
5748 struct devlink_dpipe_table *table;
5749 int err = 0;
5750
5751 mutex_lock(&devlink->lock);
5752 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
5753 table_name);
5754 if (!table) {
5755 err = -EINVAL;
5756 goto out;
5757 }
5758 table->resource_id = resource_id;
5759 table->resource_units = resource_units;
5760 table->resource_valid = true;
5761 out:
5762 mutex_unlock(&devlink->lock);
5763 return err;
5764 }
5765 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
5766
5767 /**
5768 * devlink_resource_occ_get_register - register occupancy getter
5769 *
5770 * @devlink: devlink
5771 * @resource_id: resource id
5772 * @occ_get: occupancy getter callback
5773 * @occ_get_priv: occupancy getter callback priv
5774 */
5775 void devlink_resource_occ_get_register(struct devlink *devlink,
5776 u64 resource_id,
5777 devlink_resource_occ_get_t *occ_get,
5778 void *occ_get_priv)
5779 {
5780 struct devlink_resource *resource;
5781
5782 mutex_lock(&devlink->lock);
5783 resource = devlink_resource_find(devlink, NULL, resource_id);
5784 if (WARN_ON(!resource))
5785 goto out;
5786 WARN_ON(resource->occ_get);
5787
5788 resource->occ_get = occ_get;
5789 resource->occ_get_priv = occ_get_priv;
5790 out:
5791 mutex_unlock(&devlink->lock);
5792 }
5793 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
5794
5795 /**
5796 * devlink_resource_occ_get_unregister - unregister occupancy getter
5797 *
5798 * @devlink: devlink
5799 * @resource_id: resource id
5800 */
5801 void devlink_resource_occ_get_unregister(struct devlink *devlink,
5802 u64 resource_id)
5803 {
5804 struct devlink_resource *resource;
5805
5806 mutex_lock(&devlink->lock);
5807 resource = devlink_resource_find(devlink, NULL, resource_id);
5808 if (WARN_ON(!resource))
5809 goto out;
5810 WARN_ON(!resource->occ_get);
5811
5812 resource->occ_get = NULL;
5813 resource->occ_get_priv = NULL;
5814 out:
5815 mutex_unlock(&devlink->lock);
5816 }
5817 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
5818
5819 static int devlink_param_verify(const struct devlink_param *param)
5820 {
5821 if (!param || !param->name || !param->supported_cmodes)
5822 return -EINVAL;
5823 if (param->generic)
5824 return devlink_param_generic_verify(param);
5825 else
5826 return devlink_param_driver_verify(param);
5827 }
5828
5829 static int __devlink_params_register(struct devlink *devlink,
5830 unsigned int port_index,
5831 struct list_head *param_list,
5832 const struct devlink_param *params,
5833 size_t params_count,
5834 enum devlink_command reg_cmd,
5835 enum devlink_command unreg_cmd)
5836 {
5837 const struct devlink_param *param = params;
5838 int i;
5839 int err;
5840
5841 mutex_lock(&devlink->lock);
5842 for (i = 0; i < params_count; i++, param++) {
5843 err = devlink_param_verify(param);
5844 if (err)
5845 goto rollback;
5846
5847 err = devlink_param_register_one(devlink, port_index,
5848 param_list, param, reg_cmd);
5849 if (err)
5850 goto rollback;
5851 }
5852
5853 mutex_unlock(&devlink->lock);
5854 return 0;
5855
5856 rollback:
5857 if (!i)
5858 goto unlock;
5859 for (param--; i > 0; i--, param--)
5860 devlink_param_unregister_one(devlink, port_index, param_list,
5861 param, unreg_cmd);
5862 unlock:
5863 mutex_unlock(&devlink->lock);
5864 return err;
5865 }
5866
5867 static void __devlink_params_unregister(struct devlink *devlink,
5868 unsigned int port_index,
5869 struct list_head *param_list,
5870 const struct devlink_param *params,
5871 size_t params_count,
5872 enum devlink_command cmd)
5873 {
5874 const struct devlink_param *param = params;
5875 int i;
5876
5877 mutex_lock(&devlink->lock);
5878 for (i = 0; i < params_count; i++, param++)
5879 devlink_param_unregister_one(devlink, 0, param_list, param,
5880 cmd);
5881 mutex_unlock(&devlink->lock);
5882 }
5883
5884 /**
5885 * devlink_params_register - register configuration parameters
5886 *
5887 * @devlink: devlink
5888 * @params: configuration parameters array
5889 * @params_count: number of parameters provided
5890 *
5891 * Register the configuration parameters supported by the driver.
5892 */
5893 int devlink_params_register(struct devlink *devlink,
5894 const struct devlink_param *params,
5895 size_t params_count)
5896 {
5897 return __devlink_params_register(devlink, 0, &devlink->param_list,
5898 params, params_count,
5899 DEVLINK_CMD_PARAM_NEW,
5900 DEVLINK_CMD_PARAM_DEL);
5901 }
5902 EXPORT_SYMBOL_GPL(devlink_params_register);
5903
5904 /**
5905 * devlink_params_unregister - unregister configuration parameters
5906 * @devlink: devlink
5907 * @params: configuration parameters to unregister
5908 * @params_count: number of parameters provided
5909 */
5910 void devlink_params_unregister(struct devlink *devlink,
5911 const struct devlink_param *params,
5912 size_t params_count)
5913 {
5914 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
5915 params, params_count,
5916 DEVLINK_CMD_PARAM_DEL);
5917 }
5918 EXPORT_SYMBOL_GPL(devlink_params_unregister);
5919
5920 /**
5921 * devlink_params_publish - publish configuration parameters
5922 *
5923 * @devlink: devlink
5924 *
5925 * Publish previously registered configuration parameters.
5926 */
5927 void devlink_params_publish(struct devlink *devlink)
5928 {
5929 struct devlink_param_item *param_item;
5930
5931 list_for_each_entry(param_item, &devlink->param_list, list) {
5932 if (param_item->published)
5933 continue;
5934 param_item->published = true;
5935 devlink_param_notify(devlink, 0, param_item,
5936 DEVLINK_CMD_PARAM_NEW);
5937 }
5938 }
5939 EXPORT_SYMBOL_GPL(devlink_params_publish);
5940
5941 /**
5942 * devlink_params_unpublish - unpublish configuration parameters
5943 *
5944 * @devlink: devlink
5945 *
5946 * Unpublish previously registered configuration parameters.
5947 */
5948 void devlink_params_unpublish(struct devlink *devlink)
5949 {
5950 struct devlink_param_item *param_item;
5951
5952 list_for_each_entry(param_item, &devlink->param_list, list) {
5953 if (!param_item->published)
5954 continue;
5955 param_item->published = false;
5956 devlink_param_notify(devlink, 0, param_item,
5957 DEVLINK_CMD_PARAM_DEL);
5958 }
5959 }
5960 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
5961
5962 /**
5963 * devlink_port_params_register - register port configuration parameters
5964 *
5965 * @devlink_port: devlink port
5966 * @params: configuration parameters array
5967 * @params_count: number of parameters provided
5968 *
5969 * Register the configuration parameters supported by the port.
5970 */
5971 int devlink_port_params_register(struct devlink_port *devlink_port,
5972 const struct devlink_param *params,
5973 size_t params_count)
5974 {
5975 return __devlink_params_register(devlink_port->devlink,
5976 devlink_port->index,
5977 &devlink_port->param_list, params,
5978 params_count,
5979 DEVLINK_CMD_PORT_PARAM_NEW,
5980 DEVLINK_CMD_PORT_PARAM_DEL);
5981 }
5982 EXPORT_SYMBOL_GPL(devlink_port_params_register);
5983
5984 /**
5985 * devlink_port_params_unregister - unregister port configuration
5986 * parameters
5987 *
5988 * @devlink_port: devlink port
5989 * @params: configuration parameters array
5990 * @params_count: number of parameters provided
5991 */
5992 void devlink_port_params_unregister(struct devlink_port *devlink_port,
5993 const struct devlink_param *params,
5994 size_t params_count)
5995 {
5996 return __devlink_params_unregister(devlink_port->devlink,
5997 devlink_port->index,
5998 &devlink_port->param_list,
5999 params, params_count,
6000 DEVLINK_CMD_PORT_PARAM_DEL);
6001 }
6002 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
6003
6004 static int
6005 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
6006 union devlink_param_value *init_val)
6007 {
6008 struct devlink_param_item *param_item;
6009
6010 param_item = devlink_param_find_by_id(param_list, param_id);
6011 if (!param_item)
6012 return -EINVAL;
6013
6014 if (!param_item->driverinit_value_valid ||
6015 !devlink_param_cmode_is_supported(param_item->param,
6016 DEVLINK_PARAM_CMODE_DRIVERINIT))
6017 return -EOPNOTSUPP;
6018
6019 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
6020 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
6021 else
6022 *init_val = param_item->driverinit_value;
6023
6024 return 0;
6025 }
6026
6027 static int
6028 __devlink_param_driverinit_value_set(struct devlink *devlink,
6029 unsigned int port_index,
6030 struct list_head *param_list, u32 param_id,
6031 union devlink_param_value init_val,
6032 enum devlink_command cmd)
6033 {
6034 struct devlink_param_item *param_item;
6035
6036 param_item = devlink_param_find_by_id(param_list, param_id);
6037 if (!param_item)
6038 return -EINVAL;
6039
6040 if (!devlink_param_cmode_is_supported(param_item->param,
6041 DEVLINK_PARAM_CMODE_DRIVERINIT))
6042 return -EOPNOTSUPP;
6043
6044 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
6045 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
6046 else
6047 param_item->driverinit_value = init_val;
6048 param_item->driverinit_value_valid = true;
6049
6050 devlink_param_notify(devlink, port_index, param_item, cmd);
6051 return 0;
6052 }
6053
6054 /**
6055 * devlink_param_driverinit_value_get - get configuration parameter
6056 * value for driver initializing
6057 *
6058 * @devlink: devlink
6059 * @param_id: parameter ID
6060 * @init_val: value of parameter in driverinit configuration mode
6061 *
6062 * This function should be used by the driver to get driverinit
6063 * configuration for initialization after reload command.
6064 */
6065 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
6066 union devlink_param_value *init_val)
6067 {
6068 if (!devlink->ops->reload)
6069 return -EOPNOTSUPP;
6070
6071 return __devlink_param_driverinit_value_get(&devlink->param_list,
6072 param_id, init_val);
6073 }
6074 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
6075
6076 /**
6077 * devlink_param_driverinit_value_set - set value of configuration
6078 * parameter for driverinit
6079 * configuration mode
6080 *
6081 * @devlink: devlink
6082 * @param_id: parameter ID
6083 * @init_val: value of parameter to set for driverinit configuration mode
6084 *
6085 * This function should be used by the driver to set driverinit
6086 * configuration mode default value.
6087 */
6088 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
6089 union devlink_param_value init_val)
6090 {
6091 return __devlink_param_driverinit_value_set(devlink, 0,
6092 &devlink->param_list,
6093 param_id, init_val,
6094 DEVLINK_CMD_PARAM_NEW);
6095 }
6096 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
6097
6098 /**
6099 * devlink_port_param_driverinit_value_get - get configuration parameter
6100 * value for driver initializing
6101 *
6102 * @devlink_port: devlink_port
6103 * @param_id: parameter ID
6104 * @init_val: value of parameter in driverinit configuration mode
6105 *
6106 * This function should be used by the driver to get driverinit
6107 * configuration for initialization after reload command.
6108 */
6109 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
6110 u32 param_id,
6111 union devlink_param_value *init_val)
6112 {
6113 struct devlink *devlink = devlink_port->devlink;
6114
6115 if (!devlink->ops->reload)
6116 return -EOPNOTSUPP;
6117
6118 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
6119 param_id, init_val);
6120 }
6121 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
6122
6123 /**
6124 * devlink_port_param_driverinit_value_set - set value of configuration
6125 * parameter for driverinit
6126 * configuration mode
6127 *
6128 * @devlink_port: devlink_port
6129 * @param_id: parameter ID
6130 * @init_val: value of parameter to set for driverinit configuration mode
6131 *
6132 * This function should be used by the driver to set driverinit
6133 * configuration mode default value.
6134 */
6135 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
6136 u32 param_id,
6137 union devlink_param_value init_val)
6138 {
6139 return __devlink_param_driverinit_value_set(devlink_port->devlink,
6140 devlink_port->index,
6141 &devlink_port->param_list,
6142 param_id, init_val,
6143 DEVLINK_CMD_PORT_PARAM_NEW);
6144 }
6145 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
6146
6147 /**
6148 * devlink_param_value_changed - notify devlink on a parameter's value
6149 * change. Should be called by the driver
6150 * right after the change.
6151 *
6152 * @devlink: devlink
6153 * @param_id: parameter ID
6154 *
6155 * This function should be used by the driver to notify devlink on value
6156 * change, excluding driverinit configuration mode.
6157 * For driverinit configuration mode driver should use the function
6158 */
6159 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
6160 {
6161 struct devlink_param_item *param_item;
6162
6163 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
6164 WARN_ON(!param_item);
6165
6166 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
6167 }
6168 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
6169
6170 /**
6171 * devlink_port_param_value_changed - notify devlink on a parameter's value
6172 * change. Should be called by the driver
6173 * right after the change.
6174 *
6175 * @devlink_port: devlink_port
6176 * @param_id: parameter ID
6177 *
6178 * This function should be used by the driver to notify devlink on value
6179 * change, excluding driverinit configuration mode.
6180 * For driverinit configuration mode driver should use the function
6181 * devlink_port_param_driverinit_value_set() instead.
6182 */
6183 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
6184 u32 param_id)
6185 {
6186 struct devlink_param_item *param_item;
6187
6188 param_item = devlink_param_find_by_id(&devlink_port->param_list,
6189 param_id);
6190 WARN_ON(!param_item);
6191
6192 devlink_param_notify(devlink_port->devlink, devlink_port->index,
6193 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
6194 }
6195 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
6196
6197 /**
6198 * devlink_param_value_str_fill - Safely fill-up the string preventing
6199 * from overflow of the preallocated buffer
6200 *
6201 * @dst_val: destination devlink_param_value
6202 * @src: source buffer
6203 */
6204 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
6205 const char *src)
6206 {
6207 size_t len;
6208
6209 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
6210 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
6211 }
6212 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
6213
6214 /**
6215 * devlink_region_create - create a new address region
6216 *
6217 * @devlink: devlink
6218 * @region_name: region name
6219 * @region_max_snapshots: Maximum supported number of snapshots for region
6220 * @region_size: size of region
6221 */
6222 struct devlink_region *devlink_region_create(struct devlink *devlink,
6223 const char *region_name,
6224 u32 region_max_snapshots,
6225 u64 region_size)
6226 {
6227 struct devlink_region *region;
6228 int err = 0;
6229
6230 mutex_lock(&devlink->lock);
6231
6232 if (devlink_region_get_by_name(devlink, region_name)) {
6233 err = -EEXIST;
6234 goto unlock;
6235 }
6236
6237 region = kzalloc(sizeof(*region), GFP_KERNEL);
6238 if (!region) {
6239 err = -ENOMEM;
6240 goto unlock;
6241 }
6242
6243 region->devlink = devlink;
6244 region->max_snapshots = region_max_snapshots;
6245 region->name = region_name;
6246 region->size = region_size;
6247 INIT_LIST_HEAD(&region->snapshot_list);
6248 list_add_tail(&region->list, &devlink->region_list);
6249 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
6250
6251 mutex_unlock(&devlink->lock);
6252 return region;
6253
6254 unlock:
6255 mutex_unlock(&devlink->lock);
6256 return ERR_PTR(err);
6257 }
6258 EXPORT_SYMBOL_GPL(devlink_region_create);
6259
6260 /**
6261 * devlink_region_destroy - destroy address region
6262 *
6263 * @region: devlink region to destroy
6264 */
6265 void devlink_region_destroy(struct devlink_region *region)
6266 {
6267 struct devlink *devlink = region->devlink;
6268 struct devlink_snapshot *snapshot, *ts;
6269
6270 mutex_lock(&devlink->lock);
6271
6272 /* Free all snapshots of region */
6273 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
6274 devlink_region_snapshot_del(snapshot);
6275
6276 list_del(&region->list);
6277
6278 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
6279 mutex_unlock(&devlink->lock);
6280 kfree(region);
6281 }
6282 EXPORT_SYMBOL_GPL(devlink_region_destroy);
6283
6284 /**
6285 * devlink_region_shapshot_id_get - get snapshot ID
6286 *
6287 * This callback should be called when adding a new snapshot,
6288 * Driver should use the same id for multiple snapshots taken
6289 * on multiple regions at the same time/by the same trigger.
6290 *
6291 * @devlink: devlink
6292 */
6293 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
6294 {
6295 u32 id;
6296
6297 mutex_lock(&devlink->lock);
6298 id = ++devlink->snapshot_id;
6299 mutex_unlock(&devlink->lock);
6300
6301 return id;
6302 }
6303 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
6304
6305 /**
6306 * devlink_region_snapshot_create - create a new snapshot
6307 * This will add a new snapshot of a region. The snapshot
6308 * will be stored on the region struct and can be accessed
6309 * from devlink. This is useful for future analyses of snapshots.
6310 * Multiple snapshots can be created on a region.
6311 * The @snapshot_id should be obtained using the getter function.
6312 *
6313 * @region: devlink region of the snapshot
6314 * @data_len: size of snapshot data
6315 * @data: snapshot data
6316 * @snapshot_id: snapshot id to be created
6317 * @data_destructor: pointer to destructor function to free data
6318 */
6319 int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
6320 u8 *data, u32 snapshot_id,
6321 devlink_snapshot_data_dest_t *data_destructor)
6322 {
6323 struct devlink *devlink = region->devlink;
6324 struct devlink_snapshot *snapshot;
6325 int err;
6326
6327 mutex_lock(&devlink->lock);
6328
6329 /* check if region can hold one more snapshot */
6330 if (region->cur_snapshots == region->max_snapshots) {
6331 err = -ENOMEM;
6332 goto unlock;
6333 }
6334
6335 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
6336 err = -EEXIST;
6337 goto unlock;
6338 }
6339
6340 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
6341 if (!snapshot) {
6342 err = -ENOMEM;
6343 goto unlock;
6344 }
6345
6346 snapshot->id = snapshot_id;
6347 snapshot->region = region;
6348 snapshot->data = data;
6349 snapshot->data_len = data_len;
6350 snapshot->data_destructor = data_destructor;
6351
6352 list_add_tail(&snapshot->list, &region->snapshot_list);
6353
6354 region->cur_snapshots++;
6355
6356 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
6357 mutex_unlock(&devlink->lock);
6358 return 0;
6359
6360 unlock:
6361 mutex_unlock(&devlink->lock);
6362 return err;
6363 }
6364 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
6365
6366 static void __devlink_compat_running_version(struct devlink *devlink,
6367 char *buf, size_t len)
6368 {
6369 const struct nlattr *nlattr;
6370 struct devlink_info_req req;
6371 struct sk_buff *msg;
6372 int rem, err;
6373
6374 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6375 if (!msg)
6376 return;
6377
6378 req.msg = msg;
6379 err = devlink->ops->info_get(devlink, &req, NULL);
6380 if (err)
6381 goto free_msg;
6382
6383 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
6384 const struct nlattr *kv;
6385 int rem_kv;
6386
6387 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
6388 continue;
6389
6390 nla_for_each_nested(kv, nlattr, rem_kv) {
6391 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
6392 continue;
6393
6394 strlcat(buf, nla_data(kv), len);
6395 strlcat(buf, " ", len);
6396 }
6397 }
6398 free_msg:
6399 nlmsg_free(msg);
6400 }
6401
6402 void devlink_compat_running_version(struct net_device *dev,
6403 char *buf, size_t len)
6404 {
6405 struct devlink *devlink;
6406
6407 dev_hold(dev);
6408 rtnl_unlock();
6409
6410 mutex_lock(&devlink_mutex);
6411 devlink = netdev_to_devlink(dev);
6412 if (!devlink || !devlink->ops->info_get)
6413 goto unlock_list;
6414
6415 mutex_lock(&devlink->lock);
6416 __devlink_compat_running_version(devlink, buf, len);
6417 mutex_unlock(&devlink->lock);
6418 unlock_list:
6419 mutex_unlock(&devlink_mutex);
6420
6421 rtnl_lock();
6422 dev_put(dev);
6423 }
6424
6425 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
6426 {
6427 struct devlink *devlink;
6428 int ret = -EOPNOTSUPP;
6429
6430 dev_hold(dev);
6431 rtnl_unlock();
6432
6433 mutex_lock(&devlink_mutex);
6434 devlink = netdev_to_devlink(dev);
6435 if (!devlink || !devlink->ops->flash_update)
6436 goto unlock_list;
6437
6438 mutex_lock(&devlink->lock);
6439 ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
6440 mutex_unlock(&devlink->lock);
6441 unlock_list:
6442 mutex_unlock(&devlink_mutex);
6443
6444 rtnl_lock();
6445 dev_put(dev);
6446
6447 return ret;
6448 }
6449
6450 static int __init devlink_init(void)
6451 {
6452 return genl_register_family(&devlink_nl_family);
6453 }
6454
6455 subsys_initcall(devlink_init);
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