?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 5.1.3
[linux/fpc-iii.git] / net / core / devlink.c
blobda0a29f30885d1f54b975ecfa4f83b47c68be543
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 const struct genl_ops *ops = cb->data;
3644 struct devlink_region *region;
3645 struct nlattr *chunks_attr;
3646 const char *region_name;
3647 struct devlink *devlink;
3648 struct nlattr **attrs;
3649 bool dump = true;
3650 void *hdr;
3651 int err;
3652
3653 start_offset = *((u64 *)&cb->args[0]);
3654
3655 attrs = kmalloc_array(DEVLINK_ATTR_MAX + 1, sizeof(*attrs), GFP_KERNEL);
3656 if (!attrs)
3657 return -ENOMEM;
3658
3659 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + devlink_nl_family.hdrsize,
3660 attrs, DEVLINK_ATTR_MAX, ops->policy, 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 if (!devlink->ops->info_get) {
3901 idx++;
3902 continue;
3903 }
3904
3905 mutex_lock(&devlink->lock);
3906 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
3907 NETLINK_CB(cb->skb).portid,
3908 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3909 cb->extack);
3910 mutex_unlock(&devlink->lock);
3911 if (err)
3912 break;
3913 idx++;
3914 }
3915 mutex_unlock(&devlink_mutex);
3916
3917 cb->args[0] = idx;
3918 return msg->len;
3919 }
3920
3921 struct devlink_fmsg_item {
3922 struct list_head list;
3923 int attrtype;
3924 u8 nla_type;
3925 u16 len;
3926 int value[0];
3927 };
3928
3929 struct devlink_fmsg {
3930 struct list_head item_list;
3931 };
3932
3933 static struct devlink_fmsg *devlink_fmsg_alloc(void)
3934 {
3935 struct devlink_fmsg *fmsg;
3936
3937 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
3938 if (!fmsg)
3939 return NULL;
3940
3941 INIT_LIST_HEAD(&fmsg->item_list);
3942
3943 return fmsg;
3944 }
3945
3946 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
3947 {
3948 struct devlink_fmsg_item *item, *tmp;
3949
3950 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
3951 list_del(&item->list);
3952 kfree(item);
3953 }
3954 kfree(fmsg);
3955 }
3956
3957 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
3958 int attrtype)
3959 {
3960 struct devlink_fmsg_item *item;
3961
3962 item = kzalloc(sizeof(*item), GFP_KERNEL);
3963 if (!item)
3964 return -ENOMEM;
3965
3966 item->attrtype = attrtype;
3967 list_add_tail(&item->list, &fmsg->item_list);
3968
3969 return 0;
3970 }
3971
3972 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
3973 {
3974 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
3975 }
3976 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
3977
3978 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
3979 {
3980 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
3981 }
3982
3983 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
3984 {
3985 return devlink_fmsg_nest_end(fmsg);
3986 }
3987 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
3988
3989 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
3990
3991 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
3992 {
3993 struct devlink_fmsg_item *item;
3994
3995 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
3996 return -EMSGSIZE;
3997
3998 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
3999 if (!item)
4000 return -ENOMEM;
4001
4002 item->nla_type = NLA_NUL_STRING;
4003 item->len = strlen(name) + 1;
4004 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4005 memcpy(&item->value, name, item->len);
4006 list_add_tail(&item->list, &fmsg->item_list);
4007
4008 return 0;
4009 }
4010
4011 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4012 {
4013 int err;
4014
4015 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4016 if (err)
4017 return err;
4018
4019 err = devlink_fmsg_put_name(fmsg, name);
4020 if (err)
4021 return err;
4022
4023 return 0;
4024 }
4025 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4026
4027 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4028 {
4029 return devlink_fmsg_nest_end(fmsg);
4030 }
4031 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4032
4033 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4034 const char *name)
4035 {
4036 int err;
4037
4038 err = devlink_fmsg_pair_nest_start(fmsg, name);
4039 if (err)
4040 return err;
4041
4042 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4043 if (err)
4044 return err;
4045
4046 return 0;
4047 }
4048 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4049
4050 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4051 {
4052 int err;
4053
4054 err = devlink_fmsg_nest_end(fmsg);
4055 if (err)
4056 return err;
4057
4058 err = devlink_fmsg_nest_end(fmsg);
4059 if (err)
4060 return err;
4061
4062 return 0;
4063 }
4064 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4065
4066 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4067 const void *value, u16 value_len,
4068 u8 value_nla_type)
4069 {
4070 struct devlink_fmsg_item *item;
4071
4072 if (value_len > DEVLINK_FMSG_MAX_SIZE)
4073 return -EMSGSIZE;
4074
4075 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4076 if (!item)
4077 return -ENOMEM;
4078
4079 item->nla_type = value_nla_type;
4080 item->len = value_len;
4081 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4082 memcpy(&item->value, value, item->len);
4083 list_add_tail(&item->list, &fmsg->item_list);
4084
4085 return 0;
4086 }
4087
4088 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4089 {
4090 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4091 }
4092 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4093
4094 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4095 {
4096 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4097 }
4098 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4099
4100 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4101 {
4102 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4103 }
4104 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4105
4106 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4107 {
4108 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4109 }
4110 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4111
4112 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4113 {
4114 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4115 NLA_NUL_STRING);
4116 }
4117 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4118
4119 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4120 u16 value_len)
4121 {
4122 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4123 }
4124 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4125
4126 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4127 bool value)
4128 {
4129 int err;
4130
4131 err = devlink_fmsg_pair_nest_start(fmsg, name);
4132 if (err)
4133 return err;
4134
4135 err = devlink_fmsg_bool_put(fmsg, value);
4136 if (err)
4137 return err;
4138
4139 err = devlink_fmsg_pair_nest_end(fmsg);
4140 if (err)
4141 return err;
4142
4143 return 0;
4144 }
4145 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4146
4147 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4148 u8 value)
4149 {
4150 int err;
4151
4152 err = devlink_fmsg_pair_nest_start(fmsg, name);
4153 if (err)
4154 return err;
4155
4156 err = devlink_fmsg_u8_put(fmsg, value);
4157 if (err)
4158 return err;
4159
4160 err = devlink_fmsg_pair_nest_end(fmsg);
4161 if (err)
4162 return err;
4163
4164 return 0;
4165 }
4166 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4167
4168 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4169 u32 value)
4170 {
4171 int err;
4172
4173 err = devlink_fmsg_pair_nest_start(fmsg, name);
4174 if (err)
4175 return err;
4176
4177 err = devlink_fmsg_u32_put(fmsg, value);
4178 if (err)
4179 return err;
4180
4181 err = devlink_fmsg_pair_nest_end(fmsg);
4182 if (err)
4183 return err;
4184
4185 return 0;
4186 }
4187 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4188
4189 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4190 u64 value)
4191 {
4192 int err;
4193
4194 err = devlink_fmsg_pair_nest_start(fmsg, name);
4195 if (err)
4196 return err;
4197
4198 err = devlink_fmsg_u64_put(fmsg, value);
4199 if (err)
4200 return err;
4201
4202 err = devlink_fmsg_pair_nest_end(fmsg);
4203 if (err)
4204 return err;
4205
4206 return 0;
4207 }
4208 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4209
4210 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4211 const char *value)
4212 {
4213 int err;
4214
4215 err = devlink_fmsg_pair_nest_start(fmsg, name);
4216 if (err)
4217 return err;
4218
4219 err = devlink_fmsg_string_put(fmsg, value);
4220 if (err)
4221 return err;
4222
4223 err = devlink_fmsg_pair_nest_end(fmsg);
4224 if (err)
4225 return err;
4226
4227 return 0;
4228 }
4229 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4230
4231 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4232 const void *value, u16 value_len)
4233 {
4234 int err;
4235
4236 err = devlink_fmsg_pair_nest_start(fmsg, name);
4237 if (err)
4238 return err;
4239
4240 err = devlink_fmsg_binary_put(fmsg, value, value_len);
4241 if (err)
4242 return err;
4243
4244 err = devlink_fmsg_pair_nest_end(fmsg);
4245 if (err)
4246 return err;
4247
4248 return 0;
4249 }
4250 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4251
4252 static int
4253 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4254 {
4255 switch (msg->nla_type) {
4256 case NLA_FLAG:
4257 case NLA_U8:
4258 case NLA_U32:
4259 case NLA_U64:
4260 case NLA_NUL_STRING:
4261 case NLA_BINARY:
4262 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4263 msg->nla_type);
4264 default:
4265 return -EINVAL;
4266 }
4267 }
4268
4269 static int
4270 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4271 {
4272 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4273 u8 tmp;
4274
4275 switch (msg->nla_type) {
4276 case NLA_FLAG:
4277 /* Always provide flag data, regardless of its value */
4278 tmp = *(bool *) msg->value;
4279
4280 return nla_put_u8(skb, attrtype, tmp);
4281 case NLA_U8:
4282 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4283 case NLA_U32:
4284 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4285 case NLA_U64:
4286 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4287 DEVLINK_ATTR_PAD);
4288 case NLA_NUL_STRING:
4289 return nla_put_string(skb, attrtype, (char *) &msg->value);
4290 case NLA_BINARY:
4291 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4292 default:
4293 return -EINVAL;
4294 }
4295 }
4296
4297 static int
4298 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4299 int *start)
4300 {
4301 struct devlink_fmsg_item *item;
4302 struct nlattr *fmsg_nlattr;
4303 int i = 0;
4304 int err;
4305
4306 fmsg_nlattr = nla_nest_start(skb, DEVLINK_ATTR_FMSG);
4307 if (!fmsg_nlattr)
4308 return -EMSGSIZE;
4309
4310 list_for_each_entry(item, &fmsg->item_list, list) {
4311 if (i < *start) {
4312 i++;
4313 continue;
4314 }
4315
4316 switch (item->attrtype) {
4317 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4318 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4319 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4320 case DEVLINK_ATTR_FMSG_NEST_END:
4321 err = nla_put_flag(skb, item->attrtype);
4322 break;
4323 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4324 err = devlink_fmsg_item_fill_type(item, skb);
4325 if (err)
4326 break;
4327 err = devlink_fmsg_item_fill_data(item, skb);
4328 break;
4329 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4330 err = nla_put_string(skb, item->attrtype,
4331 (char *) &item->value);
4332 break;
4333 default:
4334 err = -EINVAL;
4335 break;
4336 }
4337 if (!err)
4338 *start = ++i;
4339 else
4340 break;
4341 }
4342
4343 nla_nest_end(skb, fmsg_nlattr);
4344 return err;
4345 }
4346
4347 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4348 struct genl_info *info,
4349 enum devlink_command cmd, int flags)
4350 {
4351 struct nlmsghdr *nlh;
4352 struct sk_buff *skb;
4353 bool last = false;
4354 int index = 0;
4355 void *hdr;
4356 int err;
4357
4358 while (!last) {
4359 int tmp_index = index;
4360
4361 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4362 if (!skb)
4363 return -ENOMEM;
4364
4365 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4366 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4367 if (!hdr) {
4368 err = -EMSGSIZE;
4369 goto nla_put_failure;
4370 }
4371
4372 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4373 if (!err)
4374 last = true;
4375 else if (err != -EMSGSIZE || tmp_index == index)
4376 goto nla_put_failure;
4377
4378 genlmsg_end(skb, hdr);
4379 err = genlmsg_reply(skb, info);
4380 if (err)
4381 return err;
4382 }
4383
4384 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4385 if (!skb)
4386 return -ENOMEM;
4387 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4388 NLMSG_DONE, 0, flags | NLM_F_MULTI);
4389 if (!nlh) {
4390 err = -EMSGSIZE;
4391 goto nla_put_failure;
4392 }
4393
4394 return genlmsg_reply(skb, info);
4395
4396 nla_put_failure:
4397 nlmsg_free(skb);
4398 return err;
4399 }
4400
4401 struct devlink_health_reporter {
4402 struct list_head list;
4403 void *priv;
4404 const struct devlink_health_reporter_ops *ops;
4405 struct devlink *devlink;
4406 struct devlink_fmsg *dump_fmsg;
4407 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4408 u64 graceful_period;
4409 bool auto_recover;
4410 u8 health_state;
4411 u64 dump_ts;
4412 u64 error_count;
4413 u64 recovery_count;
4414 u64 last_recovery_ts;
4415 };
4416
4417 void *
4418 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4419 {
4420 return reporter->priv;
4421 }
4422 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4423
4424 static struct devlink_health_reporter *
4425 devlink_health_reporter_find_by_name(struct devlink *devlink,
4426 const char *reporter_name)
4427 {
4428 struct devlink_health_reporter *reporter;
4429
4430 list_for_each_entry(reporter, &devlink->reporter_list, list)
4431 if (!strcmp(reporter->ops->name, reporter_name))
4432 return reporter;
4433 return NULL;
4434 }
4435
4436 /**
4437 * devlink_health_reporter_create - create devlink health reporter
4438 *
4439 * @devlink: devlink
4440 * @ops: ops
4441 * @graceful_period: to avoid recovery loops, in msecs
4442 * @auto_recover: auto recover when error occurs
4443 * @priv: priv
4444 */
4445 struct devlink_health_reporter *
4446 devlink_health_reporter_create(struct devlink *devlink,
4447 const struct devlink_health_reporter_ops *ops,
4448 u64 graceful_period, bool auto_recover,
4449 void *priv)
4450 {
4451 struct devlink_health_reporter *reporter;
4452
4453 mutex_lock(&devlink->lock);
4454 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4455 reporter = ERR_PTR(-EEXIST);
4456 goto unlock;
4457 }
4458
4459 if (WARN_ON(auto_recover && !ops->recover) ||
4460 WARN_ON(graceful_period && !ops->recover)) {
4461 reporter = ERR_PTR(-EINVAL);
4462 goto unlock;
4463 }
4464
4465 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4466 if (!reporter) {
4467 reporter = ERR_PTR(-ENOMEM);
4468 goto unlock;
4469 }
4470
4471 reporter->priv = priv;
4472 reporter->ops = ops;
4473 reporter->devlink = devlink;
4474 reporter->graceful_period = graceful_period;
4475 reporter->auto_recover = auto_recover;
4476 mutex_init(&reporter->dump_lock);
4477 list_add_tail(&reporter->list, &devlink->reporter_list);
4478 unlock:
4479 mutex_unlock(&devlink->lock);
4480 return reporter;
4481 }
4482 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4483
4484 /**
4485 * devlink_health_reporter_destroy - destroy devlink health reporter
4486 *
4487 * @reporter: devlink health reporter to destroy
4488 */
4489 void
4490 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4491 {
4492 mutex_lock(&reporter->devlink->lock);
4493 list_del(&reporter->list);
4494 mutex_unlock(&reporter->devlink->lock);
4495 if (reporter->dump_fmsg)
4496 devlink_fmsg_free(reporter->dump_fmsg);
4497 kfree(reporter);
4498 }
4499 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4500
4501 void
4502 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
4503 enum devlink_health_reporter_state state)
4504 {
4505 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
4506 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
4507 return;
4508
4509 if (reporter->health_state == state)
4510 return;
4511
4512 reporter->health_state = state;
4513 trace_devlink_health_reporter_state_update(reporter->devlink,
4514 reporter->ops->name, state);
4515 }
4516 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
4517
4518 static int
4519 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4520 void *priv_ctx)
4521 {
4522 int err;
4523
4524 if (!reporter->ops->recover)
4525 return -EOPNOTSUPP;
4526
4527 err = reporter->ops->recover(reporter, priv_ctx);
4528 if (err)
4529 return err;
4530
4531 reporter->recovery_count++;
4532 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4533 reporter->last_recovery_ts = jiffies;
4534
4535 return 0;
4536 }
4537
4538 static void
4539 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4540 {
4541 if (!reporter->dump_fmsg)
4542 return;
4543 devlink_fmsg_free(reporter->dump_fmsg);
4544 reporter->dump_fmsg = NULL;
4545 }
4546
4547 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4548 void *priv_ctx)
4549 {
4550 int err;
4551
4552 if (!reporter->ops->dump)
4553 return 0;
4554
4555 if (reporter->dump_fmsg)
4556 return 0;
4557
4558 reporter->dump_fmsg = devlink_fmsg_alloc();
4559 if (!reporter->dump_fmsg) {
4560 err = -ENOMEM;
4561 return err;
4562 }
4563
4564 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4565 if (err)
4566 goto dump_err;
4567
4568 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4569 priv_ctx);
4570 if (err)
4571 goto dump_err;
4572
4573 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
4574 if (err)
4575 goto dump_err;
4576
4577 reporter->dump_ts = jiffies;
4578
4579 return 0;
4580
4581 dump_err:
4582 devlink_health_dump_clear(reporter);
4583 return err;
4584 }
4585
4586 int devlink_health_report(struct devlink_health_reporter *reporter,
4587 const char *msg, void *priv_ctx)
4588 {
4589 enum devlink_health_reporter_state prev_health_state;
4590 struct devlink *devlink = reporter->devlink;
4591
4592 /* write a log message of the current error */
4593 WARN_ON(!msg);
4594 trace_devlink_health_report(devlink, reporter->ops->name, msg);
4595 reporter->error_count++;
4596 prev_health_state = reporter->health_state;
4597 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4598
4599 /* abort if the previous error wasn't recovered */
4600 if (reporter->auto_recover &&
4601 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
4602 jiffies - reporter->last_recovery_ts <
4603 msecs_to_jiffies(reporter->graceful_period))) {
4604 trace_devlink_health_recover_aborted(devlink,
4605 reporter->ops->name,
4606 reporter->health_state,
4607 jiffies -
4608 reporter->last_recovery_ts);
4609 return -ECANCELED;
4610 }
4611
4612 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4613
4614 mutex_lock(&reporter->dump_lock);
4615 /* store current dump of current error, for later analysis */
4616 devlink_health_do_dump(reporter, priv_ctx);
4617 mutex_unlock(&reporter->dump_lock);
4618
4619 if (reporter->auto_recover)
4620 return devlink_health_reporter_recover(reporter, priv_ctx);
4621
4622 return 0;
4623 }
4624 EXPORT_SYMBOL_GPL(devlink_health_report);
4625
4626 static struct devlink_health_reporter *
4627 devlink_health_reporter_get_from_info(struct devlink *devlink,
4628 struct genl_info *info)
4629 {
4630 char *reporter_name;
4631
4632 if (!info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
4633 return NULL;
4634
4635 reporter_name =
4636 nla_data(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
4637 return devlink_health_reporter_find_by_name(devlink, reporter_name);
4638 }
4639
4640 static int
4641 devlink_nl_health_reporter_fill(struct sk_buff *msg,
4642 struct devlink *devlink,
4643 struct devlink_health_reporter *reporter,
4644 enum devlink_command cmd, u32 portid,
4645 u32 seq, int flags)
4646 {
4647 struct nlattr *reporter_attr;
4648 void *hdr;
4649
4650 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4651 if (!hdr)
4652 return -EMSGSIZE;
4653
4654 if (devlink_nl_put_handle(msg, devlink))
4655 goto genlmsg_cancel;
4656
4657 reporter_attr = nla_nest_start(msg, DEVLINK_ATTR_HEALTH_REPORTER);
4658 if (!reporter_attr)
4659 goto genlmsg_cancel;
4660 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
4661 reporter->ops->name))
4662 goto reporter_nest_cancel;
4663 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
4664 reporter->health_state))
4665 goto reporter_nest_cancel;
4666 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
4667 reporter->error_count, DEVLINK_ATTR_PAD))
4668 goto reporter_nest_cancel;
4669 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
4670 reporter->recovery_count, DEVLINK_ATTR_PAD))
4671 goto reporter_nest_cancel;
4672 if (reporter->ops->recover &&
4673 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
4674 reporter->graceful_period,
4675 DEVLINK_ATTR_PAD))
4676 goto reporter_nest_cancel;
4677 if (reporter->ops->recover &&
4678 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
4679 reporter->auto_recover))
4680 goto reporter_nest_cancel;
4681 if (reporter->dump_fmsg &&
4682 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
4683 jiffies_to_msecs(reporter->dump_ts),
4684 DEVLINK_ATTR_PAD))
4685 goto reporter_nest_cancel;
4686
4687 nla_nest_end(msg, reporter_attr);
4688 genlmsg_end(msg, hdr);
4689 return 0;
4690
4691 reporter_nest_cancel:
4692 nla_nest_end(msg, reporter_attr);
4693 genlmsg_cancel:
4694 genlmsg_cancel(msg, hdr);
4695 return -EMSGSIZE;
4696 }
4697
4698 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
4699 struct genl_info *info)
4700 {
4701 struct devlink *devlink = info->user_ptr[0];
4702 struct devlink_health_reporter *reporter;
4703 struct sk_buff *msg;
4704 int err;
4705
4706 reporter = devlink_health_reporter_get_from_info(devlink, info);
4707 if (!reporter)
4708 return -EINVAL;
4709
4710 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4711 if (!msg)
4712 return -ENOMEM;
4713
4714 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
4715 DEVLINK_CMD_HEALTH_REPORTER_GET,
4716 info->snd_portid, info->snd_seq,
4717 0);
4718 if (err) {
4719 nlmsg_free(msg);
4720 return err;
4721 }
4722
4723 return genlmsg_reply(msg, info);
4724 }
4725
4726 static int
4727 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
4728 struct netlink_callback *cb)
4729 {
4730 struct devlink_health_reporter *reporter;
4731 struct devlink *devlink;
4732 int start = cb->args[0];
4733 int idx = 0;
4734 int err;
4735
4736 mutex_lock(&devlink_mutex);
4737 list_for_each_entry(devlink, &devlink_list, list) {
4738 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4739 continue;
4740 mutex_lock(&devlink->lock);
4741 list_for_each_entry(reporter, &devlink->reporter_list,
4742 list) {
4743 if (idx < start) {
4744 idx++;
4745 continue;
4746 }
4747 err = devlink_nl_health_reporter_fill(msg, devlink,
4748 reporter,
4749 DEVLINK_CMD_HEALTH_REPORTER_GET,
4750 NETLINK_CB(cb->skb).portid,
4751 cb->nlh->nlmsg_seq,
4752 NLM_F_MULTI);
4753 if (err) {
4754 mutex_unlock(&devlink->lock);
4755 goto out;
4756 }
4757 idx++;
4758 }
4759 mutex_unlock(&devlink->lock);
4760 }
4761 out:
4762 mutex_unlock(&devlink_mutex);
4763
4764 cb->args[0] = idx;
4765 return msg->len;
4766 }
4767
4768 static int
4769 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
4770 struct genl_info *info)
4771 {
4772 struct devlink *devlink = info->user_ptr[0];
4773 struct devlink_health_reporter *reporter;
4774
4775 reporter = devlink_health_reporter_get_from_info(devlink, info);
4776 if (!reporter)
4777 return -EINVAL;
4778
4779 if (!reporter->ops->recover &&
4780 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
4781 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
4782 return -EOPNOTSUPP;
4783
4784 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
4785 reporter->graceful_period =
4786 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
4787
4788 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
4789 reporter->auto_recover =
4790 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
4791
4792 return 0;
4793 }
4794
4795 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
4796 struct genl_info *info)
4797 {
4798 struct devlink *devlink = info->user_ptr[0];
4799 struct devlink_health_reporter *reporter;
4800
4801 reporter = devlink_health_reporter_get_from_info(devlink, info);
4802 if (!reporter)
4803 return -EINVAL;
4804
4805 return devlink_health_reporter_recover(reporter, NULL);
4806 }
4807
4808 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
4809 struct genl_info *info)
4810 {
4811 struct devlink *devlink = info->user_ptr[0];
4812 struct devlink_health_reporter *reporter;
4813 struct devlink_fmsg *fmsg;
4814 int err;
4815
4816 reporter = devlink_health_reporter_get_from_info(devlink, info);
4817 if (!reporter)
4818 return -EINVAL;
4819
4820 if (!reporter->ops->diagnose)
4821 return -EOPNOTSUPP;
4822
4823 fmsg = devlink_fmsg_alloc();
4824 if (!fmsg)
4825 return -ENOMEM;
4826
4827 err = devlink_fmsg_obj_nest_start(fmsg);
4828 if (err)
4829 goto out;
4830
4831 err = reporter->ops->diagnose(reporter, fmsg);
4832 if (err)
4833 goto out;
4834
4835 err = devlink_fmsg_obj_nest_end(fmsg);
4836 if (err)
4837 goto out;
4838
4839 err = devlink_fmsg_snd(fmsg, info,
4840 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
4841
4842 out:
4843 devlink_fmsg_free(fmsg);
4844 return err;
4845 }
4846
4847 static int devlink_nl_cmd_health_reporter_dump_get_doit(struct sk_buff *skb,
4848 struct genl_info *info)
4849 {
4850 struct devlink *devlink = info->user_ptr[0];
4851 struct devlink_health_reporter *reporter;
4852 int err;
4853
4854 reporter = devlink_health_reporter_get_from_info(devlink, info);
4855 if (!reporter)
4856 return -EINVAL;
4857
4858 if (!reporter->ops->dump)
4859 return -EOPNOTSUPP;
4860
4861 mutex_lock(&reporter->dump_lock);
4862 err = devlink_health_do_dump(reporter, NULL);
4863 if (err)
4864 goto out;
4865
4866 err = devlink_fmsg_snd(reporter->dump_fmsg, info,
4867 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET, 0);
4868
4869 out:
4870 mutex_unlock(&reporter->dump_lock);
4871 return err;
4872 }
4873
4874 static int
4875 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
4876 struct genl_info *info)
4877 {
4878 struct devlink *devlink = info->user_ptr[0];
4879 struct devlink_health_reporter *reporter;
4880
4881 reporter = devlink_health_reporter_get_from_info(devlink, info);
4882 if (!reporter)
4883 return -EINVAL;
4884
4885 if (!reporter->ops->dump)
4886 return -EOPNOTSUPP;
4887
4888 mutex_lock(&reporter->dump_lock);
4889 devlink_health_dump_clear(reporter);
4890 mutex_unlock(&reporter->dump_lock);
4891 return 0;
4892 }
4893
4894 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
4895 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
4896 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
4897 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
4898 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
4899 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
4900 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
4901 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
4902 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
4903 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
4904 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
4905 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
4906 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
4907 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
4908 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
4909 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
4910 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
4911 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
4912 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
4913 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
4914 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
4915 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
4916 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
4917 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
4918 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
4919 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
4920 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
4921 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
4922 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
4923 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
4924 };
4925
4926 static const struct genl_ops devlink_nl_ops[] = {
4927 {
4928 .cmd = DEVLINK_CMD_GET,
4929 .doit = devlink_nl_cmd_get_doit,
4930 .dumpit = devlink_nl_cmd_get_dumpit,
4931 .policy = devlink_nl_policy,
4932 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
4933 /* can be retrieved by unprivileged users */
4934 },
4935 {
4936 .cmd = DEVLINK_CMD_PORT_GET,
4937 .doit = devlink_nl_cmd_port_get_doit,
4938 .dumpit = devlink_nl_cmd_port_get_dumpit,
4939 .policy = devlink_nl_policy,
4940 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
4941 /* can be retrieved by unprivileged users */
4942 },
4943 {
4944 .cmd = DEVLINK_CMD_PORT_SET,
4945 .doit = devlink_nl_cmd_port_set_doit,
4946 .policy = devlink_nl_policy,
4947 .flags = GENL_ADMIN_PERM,
4948 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
4949 },
4950 {
4951 .cmd = DEVLINK_CMD_PORT_SPLIT,
4952 .doit = devlink_nl_cmd_port_split_doit,
4953 .policy = devlink_nl_policy,
4954 .flags = GENL_ADMIN_PERM,
4955 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4956 DEVLINK_NL_FLAG_NO_LOCK,
4957 },
4958 {
4959 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
4960 .doit = devlink_nl_cmd_port_unsplit_doit,
4961 .policy = devlink_nl_policy,
4962 .flags = GENL_ADMIN_PERM,
4963 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4964 DEVLINK_NL_FLAG_NO_LOCK,
4965 },
4966 {
4967 .cmd = DEVLINK_CMD_SB_GET,
4968 .doit = devlink_nl_cmd_sb_get_doit,
4969 .dumpit = devlink_nl_cmd_sb_get_dumpit,
4970 .policy = devlink_nl_policy,
4971 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4972 DEVLINK_NL_FLAG_NEED_SB,
4973 /* can be retrieved by unprivileged users */
4974 },
4975 {
4976 .cmd = DEVLINK_CMD_SB_POOL_GET,
4977 .doit = devlink_nl_cmd_sb_pool_get_doit,
4978 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
4979 .policy = devlink_nl_policy,
4980 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4981 DEVLINK_NL_FLAG_NEED_SB,
4982 /* can be retrieved by unprivileged users */
4983 },
4984 {
4985 .cmd = DEVLINK_CMD_SB_POOL_SET,
4986 .doit = devlink_nl_cmd_sb_pool_set_doit,
4987 .policy = devlink_nl_policy,
4988 .flags = GENL_ADMIN_PERM,
4989 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
4990 DEVLINK_NL_FLAG_NEED_SB,
4991 },
4992 {
4993 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
4994 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
4995 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
4996 .policy = devlink_nl_policy,
4997 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
4998 DEVLINK_NL_FLAG_NEED_SB,
4999 /* can be retrieved by unprivileged users */
5000 },
5001 {
5002 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
5003 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
5004 .policy = devlink_nl_policy,
5005 .flags = GENL_ADMIN_PERM,
5006 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5007 DEVLINK_NL_FLAG_NEED_SB,
5008 },
5009 {
5010 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
5011 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
5012 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
5013 .policy = devlink_nl_policy,
5014 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5015 DEVLINK_NL_FLAG_NEED_SB,
5016 /* can be retrieved by unprivileged users */
5017 },
5018 {
5019 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
5020 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
5021 .policy = devlink_nl_policy,
5022 .flags = GENL_ADMIN_PERM,
5023 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5024 DEVLINK_NL_FLAG_NEED_SB,
5025 },
5026 {
5027 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
5028 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
5029 .policy = devlink_nl_policy,
5030 .flags = GENL_ADMIN_PERM,
5031 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5032 DEVLINK_NL_FLAG_NEED_SB,
5033 },
5034 {
5035 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
5036 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
5037 .policy = devlink_nl_policy,
5038 .flags = GENL_ADMIN_PERM,
5039 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5040 DEVLINK_NL_FLAG_NEED_SB,
5041 },
5042 {
5043 .cmd = DEVLINK_CMD_ESWITCH_GET,
5044 .doit = devlink_nl_cmd_eswitch_get_doit,
5045 .policy = devlink_nl_policy,
5046 .flags = GENL_ADMIN_PERM,
5047 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5048 },
5049 {
5050 .cmd = DEVLINK_CMD_ESWITCH_SET,
5051 .doit = devlink_nl_cmd_eswitch_set_doit,
5052 .policy = devlink_nl_policy,
5053 .flags = GENL_ADMIN_PERM,
5054 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5055 DEVLINK_NL_FLAG_NO_LOCK,
5056 },
5057 {
5058 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
5059 .doit = devlink_nl_cmd_dpipe_table_get,
5060 .policy = devlink_nl_policy,
5061 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5062 /* can be retrieved by unprivileged users */
5063 },
5064 {
5065 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
5066 .doit = devlink_nl_cmd_dpipe_entries_get,
5067 .policy = devlink_nl_policy,
5068 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5069 /* can be retrieved by unprivileged users */
5070 },
5071 {
5072 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
5073 .doit = devlink_nl_cmd_dpipe_headers_get,
5074 .policy = devlink_nl_policy,
5075 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5076 /* can be retrieved by unprivileged users */
5077 },
5078 {
5079 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
5080 .doit = devlink_nl_cmd_dpipe_table_counters_set,
5081 .policy = devlink_nl_policy,
5082 .flags = GENL_ADMIN_PERM,
5083 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5084 },
5085 {
5086 .cmd = DEVLINK_CMD_RESOURCE_SET,
5087 .doit = devlink_nl_cmd_resource_set,
5088 .policy = devlink_nl_policy,
5089 .flags = GENL_ADMIN_PERM,
5090 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5091 },
5092 {
5093 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
5094 .doit = devlink_nl_cmd_resource_dump,
5095 .policy = devlink_nl_policy,
5096 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5097 /* can be retrieved by unprivileged users */
5098 },
5099 {
5100 .cmd = DEVLINK_CMD_RELOAD,
5101 .doit = devlink_nl_cmd_reload,
5102 .policy = devlink_nl_policy,
5103 .flags = GENL_ADMIN_PERM,
5104 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5105 DEVLINK_NL_FLAG_NO_LOCK,
5106 },
5107 {
5108 .cmd = DEVLINK_CMD_PARAM_GET,
5109 .doit = devlink_nl_cmd_param_get_doit,
5110 .dumpit = devlink_nl_cmd_param_get_dumpit,
5111 .policy = devlink_nl_policy,
5112 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5113 /* can be retrieved by unprivileged users */
5114 },
5115 {
5116 .cmd = DEVLINK_CMD_PARAM_SET,
5117 .doit = devlink_nl_cmd_param_set_doit,
5118 .policy = devlink_nl_policy,
5119 .flags = GENL_ADMIN_PERM,
5120 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5121 },
5122 {
5123 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
5124 .doit = devlink_nl_cmd_port_param_get_doit,
5125 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
5126 .policy = devlink_nl_policy,
5127 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5128 /* can be retrieved by unprivileged users */
5129 },
5130 {
5131 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
5132 .doit = devlink_nl_cmd_port_param_set_doit,
5133 .policy = devlink_nl_policy,
5134 .flags = GENL_ADMIN_PERM,
5135 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5136 },
5137 {
5138 .cmd = DEVLINK_CMD_REGION_GET,
5139 .doit = devlink_nl_cmd_region_get_doit,
5140 .dumpit = devlink_nl_cmd_region_get_dumpit,
5141 .policy = devlink_nl_policy,
5142 .flags = GENL_ADMIN_PERM,
5143 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5144 },
5145 {
5146 .cmd = DEVLINK_CMD_REGION_DEL,
5147 .doit = devlink_nl_cmd_region_del,
5148 .policy = devlink_nl_policy,
5149 .flags = GENL_ADMIN_PERM,
5150 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5151 },
5152 {
5153 .cmd = DEVLINK_CMD_REGION_READ,
5154 .dumpit = devlink_nl_cmd_region_read_dumpit,
5155 .policy = devlink_nl_policy,
5156 .flags = GENL_ADMIN_PERM,
5157 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5158 },
5159 {
5160 .cmd = DEVLINK_CMD_INFO_GET,
5161 .doit = devlink_nl_cmd_info_get_doit,
5162 .dumpit = devlink_nl_cmd_info_get_dumpit,
5163 .policy = devlink_nl_policy,
5164 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5165 /* can be retrieved by unprivileged users */
5166 },
5167 {
5168 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
5169 .doit = devlink_nl_cmd_health_reporter_get_doit,
5170 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
5171 .policy = devlink_nl_policy,
5172 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5173 /* can be retrieved by unprivileged users */
5174 },
5175 {
5176 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
5177 .doit = devlink_nl_cmd_health_reporter_set_doit,
5178 .policy = devlink_nl_policy,
5179 .flags = GENL_ADMIN_PERM,
5180 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5181 },
5182 {
5183 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
5184 .doit = devlink_nl_cmd_health_reporter_recover_doit,
5185 .policy = devlink_nl_policy,
5186 .flags = GENL_ADMIN_PERM,
5187 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5188 },
5189 {
5190 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
5191 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
5192 .policy = devlink_nl_policy,
5193 .flags = GENL_ADMIN_PERM,
5194 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5195 },
5196 {
5197 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
5198 .doit = devlink_nl_cmd_health_reporter_dump_get_doit,
5199 .policy = devlink_nl_policy,
5200 .flags = GENL_ADMIN_PERM,
5201 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5202 DEVLINK_NL_FLAG_NO_LOCK,
5203 },
5204 {
5205 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
5206 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
5207 .policy = devlink_nl_policy,
5208 .flags = GENL_ADMIN_PERM,
5209 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5210 DEVLINK_NL_FLAG_NO_LOCK,
5211 },
5212 {
5213 .cmd = DEVLINK_CMD_FLASH_UPDATE,
5214 .doit = devlink_nl_cmd_flash_update,
5215 .policy = devlink_nl_policy,
5216 .flags = GENL_ADMIN_PERM,
5217 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5218 },
5219 };
5220
5221 static struct genl_family devlink_nl_family __ro_after_init = {
5222 .name = DEVLINK_GENL_NAME,
5223 .version = DEVLINK_GENL_VERSION,
5224 .maxattr = DEVLINK_ATTR_MAX,
5225 .netnsok = true,
5226 .pre_doit = devlink_nl_pre_doit,
5227 .post_doit = devlink_nl_post_doit,
5228 .module = THIS_MODULE,
5229 .ops = devlink_nl_ops,
5230 .n_ops = ARRAY_SIZE(devlink_nl_ops),
5231 .mcgrps = devlink_nl_mcgrps,
5232 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
5233 };
5234
5235 /**
5236 * devlink_alloc - Allocate new devlink instance resources
5237 *
5238 * @ops: ops
5239 * @priv_size: size of user private data
5240 *
5241 * Allocate new devlink instance resources, including devlink index
5242 * and name.
5243 */
5244 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
5245 {
5246 struct devlink *devlink;
5247
5248 if (WARN_ON(!ops))
5249 return NULL;
5250
5251 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
5252 if (!devlink)
5253 return NULL;
5254 devlink->ops = ops;
5255 devlink_net_set(devlink, &init_net);
5256 INIT_LIST_HEAD(&devlink->port_list);
5257 INIT_LIST_HEAD(&devlink->sb_list);
5258 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
5259 INIT_LIST_HEAD(&devlink->resource_list);
5260 INIT_LIST_HEAD(&devlink->param_list);
5261 INIT_LIST_HEAD(&devlink->region_list);
5262 INIT_LIST_HEAD(&devlink->reporter_list);
5263 mutex_init(&devlink->lock);
5264 return devlink;
5265 }
5266 EXPORT_SYMBOL_GPL(devlink_alloc);
5267
5268 /**
5269 * devlink_register - Register devlink instance
5270 *
5271 * @devlink: devlink
5272 * @dev: parent device
5273 */
5274 int devlink_register(struct devlink *devlink, struct device *dev)
5275 {
5276 mutex_lock(&devlink_mutex);
5277 devlink->dev = dev;
5278 list_add_tail(&devlink->list, &devlink_list);
5279 devlink_notify(devlink, DEVLINK_CMD_NEW);
5280 mutex_unlock(&devlink_mutex);
5281 return 0;
5282 }
5283 EXPORT_SYMBOL_GPL(devlink_register);
5284
5285 /**
5286 * devlink_unregister - Unregister devlink instance
5287 *
5288 * @devlink: devlink
5289 */
5290 void devlink_unregister(struct devlink *devlink)
5291 {
5292 mutex_lock(&devlink_mutex);
5293 devlink_notify(devlink, DEVLINK_CMD_DEL);
5294 list_del(&devlink->list);
5295 mutex_unlock(&devlink_mutex);
5296 }
5297 EXPORT_SYMBOL_GPL(devlink_unregister);
5298
5299 /**
5300 * devlink_free - Free devlink instance resources
5301 *
5302 * @devlink: devlink
5303 */
5304 void devlink_free(struct devlink *devlink)
5305 {
5306 WARN_ON(!list_empty(&devlink->reporter_list));
5307 WARN_ON(!list_empty(&devlink->region_list));
5308 WARN_ON(!list_empty(&devlink->param_list));
5309 WARN_ON(!list_empty(&devlink->resource_list));
5310 WARN_ON(!list_empty(&devlink->dpipe_table_list));
5311 WARN_ON(!list_empty(&devlink->sb_list));
5312 WARN_ON(!list_empty(&devlink->port_list));
5313
5314 kfree(devlink);
5315 }
5316 EXPORT_SYMBOL_GPL(devlink_free);
5317
5318 /**
5319 * devlink_port_register - Register devlink port
5320 *
5321 * @devlink: devlink
5322 * @devlink_port: devlink port
5323 * @port_index: driver-specific numerical identifier of the port
5324 *
5325 * Register devlink port with provided port index. User can use
5326 * any indexing, even hw-related one. devlink_port structure
5327 * is convenient to be embedded inside user driver private structure.
5328 * Note that the caller should take care of zeroing the devlink_port
5329 * structure.
5330 */
5331 int devlink_port_register(struct devlink *devlink,
5332 struct devlink_port *devlink_port,
5333 unsigned int port_index)
5334 {
5335 mutex_lock(&devlink->lock);
5336 if (devlink_port_index_exists(devlink, port_index)) {
5337 mutex_unlock(&devlink->lock);
5338 return -EEXIST;
5339 }
5340 devlink_port->devlink = devlink;
5341 devlink_port->index = port_index;
5342 devlink_port->registered = true;
5343 list_add_tail(&devlink_port->list, &devlink->port_list);
5344 INIT_LIST_HEAD(&devlink_port->param_list);
5345 mutex_unlock(&devlink->lock);
5346 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
5347 return 0;
5348 }
5349 EXPORT_SYMBOL_GPL(devlink_port_register);
5350
5351 /**
5352 * devlink_port_unregister - Unregister devlink port
5353 *
5354 * @devlink_port: devlink port
5355 */
5356 void devlink_port_unregister(struct devlink_port *devlink_port)
5357 {
5358 struct devlink *devlink = devlink_port->devlink;
5359
5360 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
5361 mutex_lock(&devlink->lock);
5362 list_del(&devlink_port->list);
5363 mutex_unlock(&devlink->lock);
5364 }
5365 EXPORT_SYMBOL_GPL(devlink_port_unregister);
5366
5367 static void __devlink_port_type_set(struct devlink_port *devlink_port,
5368 enum devlink_port_type type,
5369 void *type_dev)
5370 {
5371 devlink_port->type = type;
5372 devlink_port->type_dev = type_dev;
5373 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
5374 }
5375
5376 /**
5377 * devlink_port_type_eth_set - Set port type to Ethernet
5378 *
5379 * @devlink_port: devlink port
5380 * @netdev: related netdevice
5381 */
5382 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
5383 struct net_device *netdev)
5384 {
5385 return __devlink_port_type_set(devlink_port,
5386 DEVLINK_PORT_TYPE_ETH, netdev);
5387 }
5388 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
5389
5390 /**
5391 * devlink_port_type_ib_set - Set port type to InfiniBand
5392 *
5393 * @devlink_port: devlink port
5394 * @ibdev: related IB device
5395 */
5396 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
5397 struct ib_device *ibdev)
5398 {
5399 return __devlink_port_type_set(devlink_port,
5400 DEVLINK_PORT_TYPE_IB, ibdev);
5401 }
5402 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
5403
5404 /**
5405 * devlink_port_type_clear - Clear port type
5406 *
5407 * @devlink_port: devlink port
5408 */
5409 void devlink_port_type_clear(struct devlink_port *devlink_port)
5410 {
5411 return __devlink_port_type_set(devlink_port,
5412 DEVLINK_PORT_TYPE_NOTSET, NULL);
5413 }
5414 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
5415
5416 /**
5417 * devlink_port_attrs_set - Set port attributes
5418 *
5419 * @devlink_port: devlink port
5420 * @flavour: flavour of the port
5421 * @port_number: number of the port that is facing user, for example
5422 * the front panel port number
5423 * @split: indicates if this is split port
5424 * @split_subport_number: if the port is split, this is the number
5425 * of subport.
5426 */
5427 void devlink_port_attrs_set(struct devlink_port *devlink_port,
5428 enum devlink_port_flavour flavour,
5429 u32 port_number, bool split,
5430 u32 split_subport_number)
5431 {
5432 struct devlink_port_attrs *attrs = &devlink_port->attrs;
5433
5434 attrs->set = true;
5435 attrs->flavour = flavour;
5436 attrs->port_number = port_number;
5437 attrs->split = split;
5438 attrs->split_subport_number = split_subport_number;
5439 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
5440 }
5441 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
5442
5443 int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
5444 char *name, size_t len)
5445 {
5446 struct devlink_port_attrs *attrs = &devlink_port->attrs;
5447 int n = 0;
5448
5449 if (!attrs->set)
5450 return -EOPNOTSUPP;
5451
5452 switch (attrs->flavour) {
5453 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
5454 if (!attrs->split)
5455 n = snprintf(name, len, "p%u", attrs->port_number);
5456 else
5457 n = snprintf(name, len, "p%us%u", attrs->port_number,
5458 attrs->split_subport_number);
5459 break;
5460 case DEVLINK_PORT_FLAVOUR_CPU:
5461 case DEVLINK_PORT_FLAVOUR_DSA:
5462 /* As CPU and DSA ports do not have a netdevice associated
5463 * case should not ever happen.
5464 */
5465 WARN_ON(1);
5466 return -EINVAL;
5467 }
5468
5469 if (n >= len)
5470 return -EINVAL;
5471
5472 return 0;
5473 }
5474 EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
5475
5476 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
5477 u32 size, u16 ingress_pools_count,
5478 u16 egress_pools_count, u16 ingress_tc_count,
5479 u16 egress_tc_count)
5480 {
5481 struct devlink_sb *devlink_sb;
5482 int err = 0;
5483
5484 mutex_lock(&devlink->lock);
5485 if (devlink_sb_index_exists(devlink, sb_index)) {
5486 err = -EEXIST;
5487 goto unlock;
5488 }
5489
5490 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
5491 if (!devlink_sb) {
5492 err = -ENOMEM;
5493 goto unlock;
5494 }
5495 devlink_sb->index = sb_index;
5496 devlink_sb->size = size;
5497 devlink_sb->ingress_pools_count = ingress_pools_count;
5498 devlink_sb->egress_pools_count = egress_pools_count;
5499 devlink_sb->ingress_tc_count = ingress_tc_count;
5500 devlink_sb->egress_tc_count = egress_tc_count;
5501 list_add_tail(&devlink_sb->list, &devlink->sb_list);
5502 unlock:
5503 mutex_unlock(&devlink->lock);
5504 return err;
5505 }
5506 EXPORT_SYMBOL_GPL(devlink_sb_register);
5507
5508 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
5509 {
5510 struct devlink_sb *devlink_sb;
5511
5512 mutex_lock(&devlink->lock);
5513 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
5514 WARN_ON(!devlink_sb);
5515 list_del(&devlink_sb->list);
5516 mutex_unlock(&devlink->lock);
5517 kfree(devlink_sb);
5518 }
5519 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
5520
5521 /**
5522 * devlink_dpipe_headers_register - register dpipe headers
5523 *
5524 * @devlink: devlink
5525 * @dpipe_headers: dpipe header array
5526 *
5527 * Register the headers supported by hardware.
5528 */
5529 int devlink_dpipe_headers_register(struct devlink *devlink,
5530 struct devlink_dpipe_headers *dpipe_headers)
5531 {
5532 mutex_lock(&devlink->lock);
5533 devlink->dpipe_headers = dpipe_headers;
5534 mutex_unlock(&devlink->lock);
5535 return 0;
5536 }
5537 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
5538
5539 /**
5540 * devlink_dpipe_headers_unregister - unregister dpipe headers
5541 *
5542 * @devlink: devlink
5543 *
5544 * Unregister the headers supported by hardware.
5545 */
5546 void devlink_dpipe_headers_unregister(struct devlink *devlink)
5547 {
5548 mutex_lock(&devlink->lock);
5549 devlink->dpipe_headers = NULL;
5550 mutex_unlock(&devlink->lock);
5551 }
5552 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
5553
5554 /**
5555 * devlink_dpipe_table_counter_enabled - check if counter allocation
5556 * required
5557 * @devlink: devlink
5558 * @table_name: tables name
5559 *
5560 * Used by driver to check if counter allocation is required.
5561 * After counter allocation is turned on the table entries
5562 * are updated to include counter statistics.
5563 *
5564 * After that point on the driver must respect the counter
5565 * state so that each entry added to the table is added
5566 * with a counter.
5567 */
5568 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
5569 const char *table_name)
5570 {
5571 struct devlink_dpipe_table *table;
5572 bool enabled;
5573
5574 rcu_read_lock();
5575 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
5576 table_name);
5577 enabled = false;
5578 if (table)
5579 enabled = table->counters_enabled;
5580 rcu_read_unlock();
5581 return enabled;
5582 }
5583 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
5584
5585 /**
5586 * devlink_dpipe_table_register - register dpipe table
5587 *
5588 * @devlink: devlink
5589 * @table_name: table name
5590 * @table_ops: table ops
5591 * @priv: priv
5592 * @counter_control_extern: external control for counters
5593 */
5594 int devlink_dpipe_table_register(struct devlink *devlink,
5595 const char *table_name,
5596 struct devlink_dpipe_table_ops *table_ops,
5597 void *priv, bool counter_control_extern)
5598 {
5599 struct devlink_dpipe_table *table;
5600
5601 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
5602 return -EEXIST;
5603
5604 if (WARN_ON(!table_ops->size_get))
5605 return -EINVAL;
5606
5607 table = kzalloc(sizeof(*table), GFP_KERNEL);
5608 if (!table)
5609 return -ENOMEM;
5610
5611 table->name = table_name;
5612 table->table_ops = table_ops;
5613 table->priv = priv;
5614 table->counter_control_extern = counter_control_extern;
5615
5616 mutex_lock(&devlink->lock);
5617 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
5618 mutex_unlock(&devlink->lock);
5619 return 0;
5620 }
5621 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
5622
5623 /**
5624 * devlink_dpipe_table_unregister - unregister dpipe table
5625 *
5626 * @devlink: devlink
5627 * @table_name: table name
5628 */
5629 void devlink_dpipe_table_unregister(struct devlink *devlink,
5630 const char *table_name)
5631 {
5632 struct devlink_dpipe_table *table;
5633
5634 mutex_lock(&devlink->lock);
5635 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
5636 table_name);
5637 if (!table)
5638 goto unlock;
5639 list_del_rcu(&table->list);
5640 mutex_unlock(&devlink->lock);
5641 kfree_rcu(table, rcu);
5642 return;
5643 unlock:
5644 mutex_unlock(&devlink->lock);
5645 }
5646 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
5647
5648 /**
5649 * devlink_resource_register - devlink resource register
5650 *
5651 * @devlink: devlink
5652 * @resource_name: resource's name
5653 * @resource_size: resource's size
5654 * @resource_id: resource's id
5655 * @parent_resource_id: resource's parent id
5656 * @size_params: size parameters
5657 */
5658 int devlink_resource_register(struct devlink *devlink,
5659 const char *resource_name,
5660 u64 resource_size,
5661 u64 resource_id,
5662 u64 parent_resource_id,
5663 const struct devlink_resource_size_params *size_params)
5664 {
5665 struct devlink_resource *resource;
5666 struct list_head *resource_list;
5667 bool top_hierarchy;
5668 int err = 0;
5669
5670 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
5671
5672 mutex_lock(&devlink->lock);
5673 resource = devlink_resource_find(devlink, NULL, resource_id);
5674 if (resource) {
5675 err = -EINVAL;
5676 goto out;
5677 }
5678
5679 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
5680 if (!resource) {
5681 err = -ENOMEM;
5682 goto out;
5683 }
5684
5685 if (top_hierarchy) {
5686 resource_list = &devlink->resource_list;
5687 } else {
5688 struct devlink_resource *parent_resource;
5689
5690 parent_resource = devlink_resource_find(devlink, NULL,
5691 parent_resource_id);
5692 if (parent_resource) {
5693 resource_list = &parent_resource->resource_list;
5694 resource->parent = parent_resource;
5695 } else {
5696 kfree(resource);
5697 err = -EINVAL;
5698 goto out;
5699 }
5700 }
5701
5702 resource->name = resource_name;
5703 resource->size = resource_size;
5704 resource->size_new = resource_size;
5705 resource->id = resource_id;
5706 resource->size_valid = true;
5707 memcpy(&resource->size_params, size_params,
5708 sizeof(resource->size_params));
5709 INIT_LIST_HEAD(&resource->resource_list);
5710 list_add_tail(&resource->list, resource_list);
5711 out:
5712 mutex_unlock(&devlink->lock);
5713 return err;
5714 }
5715 EXPORT_SYMBOL_GPL(devlink_resource_register);
5716
5717 /**
5718 * devlink_resources_unregister - free all resources
5719 *
5720 * @devlink: devlink
5721 * @resource: resource
5722 */
5723 void devlink_resources_unregister(struct devlink *devlink,
5724 struct devlink_resource *resource)
5725 {
5726 struct devlink_resource *tmp, *child_resource;
5727 struct list_head *resource_list;
5728
5729 if (resource)
5730 resource_list = &resource->resource_list;
5731 else
5732 resource_list = &devlink->resource_list;
5733
5734 if (!resource)
5735 mutex_lock(&devlink->lock);
5736
5737 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
5738 devlink_resources_unregister(devlink, child_resource);
5739 list_del(&child_resource->list);
5740 kfree(child_resource);
5741 }
5742
5743 if (!resource)
5744 mutex_unlock(&devlink->lock);
5745 }
5746 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
5747
5748 /**
5749 * devlink_resource_size_get - get and update size
5750 *
5751 * @devlink: devlink
5752 * @resource_id: the requested resource id
5753 * @p_resource_size: ptr to update
5754 */
5755 int devlink_resource_size_get(struct devlink *devlink,
5756 u64 resource_id,
5757 u64 *p_resource_size)
5758 {
5759 struct devlink_resource *resource;
5760 int err = 0;
5761
5762 mutex_lock(&devlink->lock);
5763 resource = devlink_resource_find(devlink, NULL, resource_id);
5764 if (!resource) {
5765 err = -EINVAL;
5766 goto out;
5767 }
5768 *p_resource_size = resource->size_new;
5769 resource->size = resource->size_new;
5770 out:
5771 mutex_unlock(&devlink->lock);
5772 return err;
5773 }
5774 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
5775
5776 /**
5777 * devlink_dpipe_table_resource_set - set the resource id
5778 *
5779 * @devlink: devlink
5780 * @table_name: table name
5781 * @resource_id: resource id
5782 * @resource_units: number of resource's units consumed per table's entry
5783 */
5784 int devlink_dpipe_table_resource_set(struct devlink *devlink,
5785 const char *table_name, u64 resource_id,
5786 u64 resource_units)
5787 {
5788 struct devlink_dpipe_table *table;
5789 int err = 0;
5790
5791 mutex_lock(&devlink->lock);
5792 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
5793 table_name);
5794 if (!table) {
5795 err = -EINVAL;
5796 goto out;
5797 }
5798 table->resource_id = resource_id;
5799 table->resource_units = resource_units;
5800 table->resource_valid = true;
5801 out:
5802 mutex_unlock(&devlink->lock);
5803 return err;
5804 }
5805 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
5806
5807 /**
5808 * devlink_resource_occ_get_register - register occupancy getter
5809 *
5810 * @devlink: devlink
5811 * @resource_id: resource id
5812 * @occ_get: occupancy getter callback
5813 * @occ_get_priv: occupancy getter callback priv
5814 */
5815 void devlink_resource_occ_get_register(struct devlink *devlink,
5816 u64 resource_id,
5817 devlink_resource_occ_get_t *occ_get,
5818 void *occ_get_priv)
5819 {
5820 struct devlink_resource *resource;
5821
5822 mutex_lock(&devlink->lock);
5823 resource = devlink_resource_find(devlink, NULL, resource_id);
5824 if (WARN_ON(!resource))
5825 goto out;
5826 WARN_ON(resource->occ_get);
5827
5828 resource->occ_get = occ_get;
5829 resource->occ_get_priv = occ_get_priv;
5830 out:
5831 mutex_unlock(&devlink->lock);
5832 }
5833 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
5834
5835 /**
5836 * devlink_resource_occ_get_unregister - unregister occupancy getter
5837 *
5838 * @devlink: devlink
5839 * @resource_id: resource id
5840 */
5841 void devlink_resource_occ_get_unregister(struct devlink *devlink,
5842 u64 resource_id)
5843 {
5844 struct devlink_resource *resource;
5845
5846 mutex_lock(&devlink->lock);
5847 resource = devlink_resource_find(devlink, NULL, resource_id);
5848 if (WARN_ON(!resource))
5849 goto out;
5850 WARN_ON(!resource->occ_get);
5851
5852 resource->occ_get = NULL;
5853 resource->occ_get_priv = NULL;
5854 out:
5855 mutex_unlock(&devlink->lock);
5856 }
5857 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
5858
5859 static int devlink_param_verify(const struct devlink_param *param)
5860 {
5861 if (!param || !param->name || !param->supported_cmodes)
5862 return -EINVAL;
5863 if (param->generic)
5864 return devlink_param_generic_verify(param);
5865 else
5866 return devlink_param_driver_verify(param);
5867 }
5868
5869 static int __devlink_params_register(struct devlink *devlink,
5870 unsigned int port_index,
5871 struct list_head *param_list,
5872 const struct devlink_param *params,
5873 size_t params_count,
5874 enum devlink_command reg_cmd,
5875 enum devlink_command unreg_cmd)
5876 {
5877 const struct devlink_param *param = params;
5878 int i;
5879 int err;
5880
5881 mutex_lock(&devlink->lock);
5882 for (i = 0; i < params_count; i++, param++) {
5883 err = devlink_param_verify(param);
5884 if (err)
5885 goto rollback;
5886
5887 err = devlink_param_register_one(devlink, port_index,
5888 param_list, param, reg_cmd);
5889 if (err)
5890 goto rollback;
5891 }
5892
5893 mutex_unlock(&devlink->lock);
5894 return 0;
5895
5896 rollback:
5897 if (!i)
5898 goto unlock;
5899 for (param--; i > 0; i--, param--)
5900 devlink_param_unregister_one(devlink, port_index, param_list,
5901 param, unreg_cmd);
5902 unlock:
5903 mutex_unlock(&devlink->lock);
5904 return err;
5905 }
5906
5907 static void __devlink_params_unregister(struct devlink *devlink,
5908 unsigned int port_index,
5909 struct list_head *param_list,
5910 const struct devlink_param *params,
5911 size_t params_count,
5912 enum devlink_command cmd)
5913 {
5914 const struct devlink_param *param = params;
5915 int i;
5916
5917 mutex_lock(&devlink->lock);
5918 for (i = 0; i < params_count; i++, param++)
5919 devlink_param_unregister_one(devlink, 0, param_list, param,
5920 cmd);
5921 mutex_unlock(&devlink->lock);
5922 }
5923
5924 /**
5925 * devlink_params_register - register configuration parameters
5926 *
5927 * @devlink: devlink
5928 * @params: configuration parameters array
5929 * @params_count: number of parameters provided
5930 *
5931 * Register the configuration parameters supported by the driver.
5932 */
5933 int devlink_params_register(struct devlink *devlink,
5934 const struct devlink_param *params,
5935 size_t params_count)
5936 {
5937 return __devlink_params_register(devlink, 0, &devlink->param_list,
5938 params, params_count,
5939 DEVLINK_CMD_PARAM_NEW,
5940 DEVLINK_CMD_PARAM_DEL);
5941 }
5942 EXPORT_SYMBOL_GPL(devlink_params_register);
5943
5944 /**
5945 * devlink_params_unregister - unregister configuration parameters
5946 * @devlink: devlink
5947 * @params: configuration parameters to unregister
5948 * @params_count: number of parameters provided
5949 */
5950 void devlink_params_unregister(struct devlink *devlink,
5951 const struct devlink_param *params,
5952 size_t params_count)
5953 {
5954 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
5955 params, params_count,
5956 DEVLINK_CMD_PARAM_DEL);
5957 }
5958 EXPORT_SYMBOL_GPL(devlink_params_unregister);
5959
5960 /**
5961 * devlink_params_publish - publish configuration parameters
5962 *
5963 * @devlink: devlink
5964 *
5965 * Publish previously registered configuration parameters.
5966 */
5967 void devlink_params_publish(struct devlink *devlink)
5968 {
5969 struct devlink_param_item *param_item;
5970
5971 list_for_each_entry(param_item, &devlink->param_list, list) {
5972 if (param_item->published)
5973 continue;
5974 param_item->published = true;
5975 devlink_param_notify(devlink, 0, param_item,
5976 DEVLINK_CMD_PARAM_NEW);
5977 }
5978 }
5979 EXPORT_SYMBOL_GPL(devlink_params_publish);
5980
5981 /**
5982 * devlink_params_unpublish - unpublish configuration parameters
5983 *
5984 * @devlink: devlink
5985 *
5986 * Unpublish previously registered configuration parameters.
5987 */
5988 void devlink_params_unpublish(struct devlink *devlink)
5989 {
5990 struct devlink_param_item *param_item;
5991
5992 list_for_each_entry(param_item, &devlink->param_list, list) {
5993 if (!param_item->published)
5994 continue;
5995 param_item->published = false;
5996 devlink_param_notify(devlink, 0, param_item,
5997 DEVLINK_CMD_PARAM_DEL);
5998 }
5999 }
6000 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
6001
6002 /**
6003 * devlink_port_params_register - register port configuration parameters
6004 *
6005 * @devlink_port: devlink port
6006 * @params: configuration parameters array
6007 * @params_count: number of parameters provided
6008 *
6009 * Register the configuration parameters supported by the port.
6010 */
6011 int devlink_port_params_register(struct devlink_port *devlink_port,
6012 const struct devlink_param *params,
6013 size_t params_count)
6014 {
6015 return __devlink_params_register(devlink_port->devlink,
6016 devlink_port->index,
6017 &devlink_port->param_list, params,
6018 params_count,
6019 DEVLINK_CMD_PORT_PARAM_NEW,
6020 DEVLINK_CMD_PORT_PARAM_DEL);
6021 }
6022 EXPORT_SYMBOL_GPL(devlink_port_params_register);
6023
6024 /**
6025 * devlink_port_params_unregister - unregister port configuration
6026 * parameters
6027 *
6028 * @devlink_port: devlink port
6029 * @params: configuration parameters array
6030 * @params_count: number of parameters provided
6031 */
6032 void devlink_port_params_unregister(struct devlink_port *devlink_port,
6033 const struct devlink_param *params,
6034 size_t params_count)
6035 {
6036 return __devlink_params_unregister(devlink_port->devlink,
6037 devlink_port->index,
6038 &devlink_port->param_list,
6039 params, params_count,
6040 DEVLINK_CMD_PORT_PARAM_DEL);
6041 }
6042 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
6043
6044 static int
6045 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
6046 union devlink_param_value *init_val)
6047 {
6048 struct devlink_param_item *param_item;
6049
6050 param_item = devlink_param_find_by_id(param_list, param_id);
6051 if (!param_item)
6052 return -EINVAL;
6053
6054 if (!param_item->driverinit_value_valid ||
6055 !devlink_param_cmode_is_supported(param_item->param,
6056 DEVLINK_PARAM_CMODE_DRIVERINIT))
6057 return -EOPNOTSUPP;
6058
6059 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
6060 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
6061 else
6062 *init_val = param_item->driverinit_value;
6063
6064 return 0;
6065 }
6066
6067 static int
6068 __devlink_param_driverinit_value_set(struct devlink *devlink,
6069 unsigned int port_index,
6070 struct list_head *param_list, u32 param_id,
6071 union devlink_param_value init_val,
6072 enum devlink_command cmd)
6073 {
6074 struct devlink_param_item *param_item;
6075
6076 param_item = devlink_param_find_by_id(param_list, param_id);
6077 if (!param_item)
6078 return -EINVAL;
6079
6080 if (!devlink_param_cmode_is_supported(param_item->param,
6081 DEVLINK_PARAM_CMODE_DRIVERINIT))
6082 return -EOPNOTSUPP;
6083
6084 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
6085 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
6086 else
6087 param_item->driverinit_value = init_val;
6088 param_item->driverinit_value_valid = true;
6089
6090 devlink_param_notify(devlink, port_index, param_item, cmd);
6091 return 0;
6092 }
6093
6094 /**
6095 * devlink_param_driverinit_value_get - get configuration parameter
6096 * value for driver initializing
6097 *
6098 * @devlink: devlink
6099 * @param_id: parameter ID
6100 * @init_val: value of parameter in driverinit configuration mode
6101 *
6102 * This function should be used by the driver to get driverinit
6103 * configuration for initialization after reload command.
6104 */
6105 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
6106 union devlink_param_value *init_val)
6107 {
6108 if (!devlink->ops->reload)
6109 return -EOPNOTSUPP;
6110
6111 return __devlink_param_driverinit_value_get(&devlink->param_list,
6112 param_id, init_val);
6113 }
6114 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
6115
6116 /**
6117 * devlink_param_driverinit_value_set - set value of configuration
6118 * parameter for driverinit
6119 * configuration mode
6120 *
6121 * @devlink: devlink
6122 * @param_id: parameter ID
6123 * @init_val: value of parameter to set for driverinit configuration mode
6124 *
6125 * This function should be used by the driver to set driverinit
6126 * configuration mode default value.
6127 */
6128 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
6129 union devlink_param_value init_val)
6130 {
6131 return __devlink_param_driverinit_value_set(devlink, 0,
6132 &devlink->param_list,
6133 param_id, init_val,
6134 DEVLINK_CMD_PARAM_NEW);
6135 }
6136 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
6137
6138 /**
6139 * devlink_port_param_driverinit_value_get - get configuration parameter
6140 * value for driver initializing
6141 *
6142 * @devlink_port: devlink_port
6143 * @param_id: parameter ID
6144 * @init_val: value of parameter in driverinit configuration mode
6145 *
6146 * This function should be used by the driver to get driverinit
6147 * configuration for initialization after reload command.
6148 */
6149 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
6150 u32 param_id,
6151 union devlink_param_value *init_val)
6152 {
6153 struct devlink *devlink = devlink_port->devlink;
6154
6155 if (!devlink->ops->reload)
6156 return -EOPNOTSUPP;
6157
6158 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
6159 param_id, init_val);
6160 }
6161 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
6162
6163 /**
6164 * devlink_port_param_driverinit_value_set - set value of configuration
6165 * parameter for driverinit
6166 * configuration mode
6167 *
6168 * @devlink_port: devlink_port
6169 * @param_id: parameter ID
6170 * @init_val: value of parameter to set for driverinit configuration mode
6171 *
6172 * This function should be used by the driver to set driverinit
6173 * configuration mode default value.
6174 */
6175 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
6176 u32 param_id,
6177 union devlink_param_value init_val)
6178 {
6179 return __devlink_param_driverinit_value_set(devlink_port->devlink,
6180 devlink_port->index,
6181 &devlink_port->param_list,
6182 param_id, init_val,
6183 DEVLINK_CMD_PORT_PARAM_NEW);
6184 }
6185 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
6186
6187 /**
6188 * devlink_param_value_changed - notify devlink on a parameter's value
6189 * change. Should be called by the driver
6190 * right after the change.
6191 *
6192 * @devlink: devlink
6193 * @param_id: parameter ID
6194 *
6195 * This function should be used by the driver to notify devlink on value
6196 * change, excluding driverinit configuration mode.
6197 * For driverinit configuration mode driver should use the function
6198 */
6199 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
6200 {
6201 struct devlink_param_item *param_item;
6202
6203 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
6204 WARN_ON(!param_item);
6205
6206 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
6207 }
6208 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
6209
6210 /**
6211 * devlink_port_param_value_changed - notify devlink on a parameter's value
6212 * change. Should be called by the driver
6213 * right after the change.
6214 *
6215 * @devlink_port: devlink_port
6216 * @param_id: parameter ID
6217 *
6218 * This function should be used by the driver to notify devlink on value
6219 * change, excluding driverinit configuration mode.
6220 * For driverinit configuration mode driver should use the function
6221 * devlink_port_param_driverinit_value_set() instead.
6222 */
6223 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
6224 u32 param_id)
6225 {
6226 struct devlink_param_item *param_item;
6227
6228 param_item = devlink_param_find_by_id(&devlink_port->param_list,
6229 param_id);
6230 WARN_ON(!param_item);
6231
6232 devlink_param_notify(devlink_port->devlink, devlink_port->index,
6233 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
6234 }
6235 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
6236
6237 /**
6238 * devlink_param_value_str_fill - Safely fill-up the string preventing
6239 * from overflow of the preallocated buffer
6240 *
6241 * @dst_val: destination devlink_param_value
6242 * @src: source buffer
6243 */
6244 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
6245 const char *src)
6246 {
6247 size_t len;
6248
6249 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
6250 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
6251 }
6252 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
6253
6254 /**
6255 * devlink_region_create - create a new address region
6256 *
6257 * @devlink: devlink
6258 * @region_name: region name
6259 * @region_max_snapshots: Maximum supported number of snapshots for region
6260 * @region_size: size of region
6261 */
6262 struct devlink_region *devlink_region_create(struct devlink *devlink,
6263 const char *region_name,
6264 u32 region_max_snapshots,
6265 u64 region_size)
6266 {
6267 struct devlink_region *region;
6268 int err = 0;
6269
6270 mutex_lock(&devlink->lock);
6271
6272 if (devlink_region_get_by_name(devlink, region_name)) {
6273 err = -EEXIST;
6274 goto unlock;
6275 }
6276
6277 region = kzalloc(sizeof(*region), GFP_KERNEL);
6278 if (!region) {
6279 err = -ENOMEM;
6280 goto unlock;
6281 }
6282
6283 region->devlink = devlink;
6284 region->max_snapshots = region_max_snapshots;
6285 region->name = region_name;
6286 region->size = region_size;
6287 INIT_LIST_HEAD(&region->snapshot_list);
6288 list_add_tail(&region->list, &devlink->region_list);
6289 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
6290
6291 mutex_unlock(&devlink->lock);
6292 return region;
6293
6294 unlock:
6295 mutex_unlock(&devlink->lock);
6296 return ERR_PTR(err);
6297 }
6298 EXPORT_SYMBOL_GPL(devlink_region_create);
6299
6300 /**
6301 * devlink_region_destroy - destroy address region
6302 *
6303 * @region: devlink region to destroy
6304 */
6305 void devlink_region_destroy(struct devlink_region *region)
6306 {
6307 struct devlink *devlink = region->devlink;
6308 struct devlink_snapshot *snapshot, *ts;
6309
6310 mutex_lock(&devlink->lock);
6311
6312 /* Free all snapshots of region */
6313 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
6314 devlink_region_snapshot_del(snapshot);
6315
6316 list_del(&region->list);
6317
6318 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
6319 mutex_unlock(&devlink->lock);
6320 kfree(region);
6321 }
6322 EXPORT_SYMBOL_GPL(devlink_region_destroy);
6323
6324 /**
6325 * devlink_region_shapshot_id_get - get snapshot ID
6326 *
6327 * This callback should be called when adding a new snapshot,
6328 * Driver should use the same id for multiple snapshots taken
6329 * on multiple regions at the same time/by the same trigger.
6330 *
6331 * @devlink: devlink
6332 */
6333 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
6334 {
6335 u32 id;
6336
6337 mutex_lock(&devlink->lock);
6338 id = ++devlink->snapshot_id;
6339 mutex_unlock(&devlink->lock);
6340
6341 return id;
6342 }
6343 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
6344
6345 /**
6346 * devlink_region_snapshot_create - create a new snapshot
6347 * This will add a new snapshot of a region. The snapshot
6348 * will be stored on the region struct and can be accessed
6349 * from devlink. This is useful for future analyses of snapshots.
6350 * Multiple snapshots can be created on a region.
6351 * The @snapshot_id should be obtained using the getter function.
6352 *
6353 * @region: devlink region of the snapshot
6354 * @data_len: size of snapshot data
6355 * @data: snapshot data
6356 * @snapshot_id: snapshot id to be created
6357 * @data_destructor: pointer to destructor function to free data
6358 */
6359 int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
6360 u8 *data, u32 snapshot_id,
6361 devlink_snapshot_data_dest_t *data_destructor)
6362 {
6363 struct devlink *devlink = region->devlink;
6364 struct devlink_snapshot *snapshot;
6365 int err;
6366
6367 mutex_lock(&devlink->lock);
6368
6369 /* check if region can hold one more snapshot */
6370 if (region->cur_snapshots == region->max_snapshots) {
6371 err = -ENOMEM;
6372 goto unlock;
6373 }
6374
6375 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
6376 err = -EEXIST;
6377 goto unlock;
6378 }
6379
6380 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
6381 if (!snapshot) {
6382 err = -ENOMEM;
6383 goto unlock;
6384 }
6385
6386 snapshot->id = snapshot_id;
6387 snapshot->region = region;
6388 snapshot->data = data;
6389 snapshot->data_len = data_len;
6390 snapshot->data_destructor = data_destructor;
6391
6392 list_add_tail(&snapshot->list, &region->snapshot_list);
6393
6394 region->cur_snapshots++;
6395
6396 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
6397 mutex_unlock(&devlink->lock);
6398 return 0;
6399
6400 unlock:
6401 mutex_unlock(&devlink->lock);
6402 return err;
6403 }
6404 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
6405
6406 static void __devlink_compat_running_version(struct devlink *devlink,
6407 char *buf, size_t len)
6408 {
6409 const struct nlattr *nlattr;
6410 struct devlink_info_req req;
6411 struct sk_buff *msg;
6412 int rem, err;
6413
6414 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6415 if (!msg)
6416 return;
6417
6418 req.msg = msg;
6419 err = devlink->ops->info_get(devlink, &req, NULL);
6420 if (err)
6421 goto free_msg;
6422
6423 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
6424 const struct nlattr *kv;
6425 int rem_kv;
6426
6427 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
6428 continue;
6429
6430 nla_for_each_nested(kv, nlattr, rem_kv) {
6431 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
6432 continue;
6433
6434 strlcat(buf, nla_data(kv), len);
6435 strlcat(buf, " ", len);
6436 }
6437 }
6438 free_msg:
6439 nlmsg_free(msg);
6440 }
6441
6442 void devlink_compat_running_version(struct net_device *dev,
6443 char *buf, size_t len)
6444 {
6445 struct devlink *devlink;
6446
6447 dev_hold(dev);
6448 rtnl_unlock();
6449
6450 mutex_lock(&devlink_mutex);
6451 devlink = netdev_to_devlink(dev);
6452 if (!devlink || !devlink->ops->info_get)
6453 goto unlock_list;
6454
6455 mutex_lock(&devlink->lock);
6456 __devlink_compat_running_version(devlink, buf, len);
6457 mutex_unlock(&devlink->lock);
6458 unlock_list:
6459 mutex_unlock(&devlink_mutex);
6460
6461 rtnl_lock();
6462 dev_put(dev);
6463 }
6464
6465 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
6466 {
6467 struct devlink *devlink;
6468 int ret = -EOPNOTSUPP;
6469
6470 dev_hold(dev);
6471 rtnl_unlock();
6472
6473 mutex_lock(&devlink_mutex);
6474 devlink = netdev_to_devlink(dev);
6475 if (!devlink || !devlink->ops->flash_update)
6476 goto unlock_list;
6477
6478 mutex_lock(&devlink->lock);
6479 ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
6480 mutex_unlock(&devlink->lock);
6481 unlock_list:
6482 mutex_unlock(&devlink_mutex);
6483
6484 rtnl_lock();
6485 dev_put(dev);
6486
6487 return ret;
6488 }
6489
6490 static int __init devlink_init(void)
6491 {
6492 return genl_register_family(&devlink_nl_family);
6493 }
6494
6495 subsys_initcall(devlink_init);
Linux with added FPC-III support