?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'drm-next-2018-08-24' of git://anongit.freedesktop.org/drm/drm
[linux-2.6/btrfs-unstable.git] / net / core / devlink.c
blob65fc366a78a4c455a02e74bdc30c9249698eb488
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
85 static LIST_HEAD(devlink_list);
86
87 /* devlink_mutex
88 *
89 * An overall lock guarding every operation coming from userspace.
90 * It also guards devlink devices list and it is taken when
91 * driver registers/unregisters it.
92 */
93 static DEFINE_MUTEX(devlink_mutex);
94
95 static struct net *devlink_net(const struct devlink *devlink)
96 {
97 return read_pnet(&devlink->_net);
98 }
99
100 static void devlink_net_set(struct devlink *devlink, struct net *net)
101 {
102 write_pnet(&devlink->_net, net);
103 }
104
105 static struct devlink *devlink_get_from_attrs(struct net *net,
106 struct nlattr **attrs)
107 {
108 struct devlink *devlink;
109 char *busname;
110 char *devname;
111
112 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
113 return ERR_PTR(-EINVAL);
114
115 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
116 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
117
118 list_for_each_entry(devlink, &devlink_list, list) {
119 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
120 strcmp(dev_name(devlink->dev), devname) == 0 &&
121 net_eq(devlink_net(devlink), net))
122 return devlink;
123 }
124
125 return ERR_PTR(-ENODEV);
126 }
127
128 static struct devlink *devlink_get_from_info(struct genl_info *info)
129 {
130 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
131 }
132
133 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
134 int port_index)
135 {
136 struct devlink_port *devlink_port;
137
138 list_for_each_entry(devlink_port, &devlink->port_list, list) {
139 if (devlink_port->index == port_index)
140 return devlink_port;
141 }
142 return NULL;
143 }
144
145 static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
146 {
147 return devlink_port_get_by_index(devlink, port_index);
148 }
149
150 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
151 struct nlattr **attrs)
152 {
153 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
154 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
155 struct devlink_port *devlink_port;
156
157 devlink_port = devlink_port_get_by_index(devlink, port_index);
158 if (!devlink_port)
159 return ERR_PTR(-ENODEV);
160 return devlink_port;
161 }
162 return ERR_PTR(-EINVAL);
163 }
164
165 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
166 struct genl_info *info)
167 {
168 return devlink_port_get_from_attrs(devlink, info->attrs);
169 }
170
171 struct devlink_sb {
172 struct list_head list;
173 unsigned int index;
174 u32 size;
175 u16 ingress_pools_count;
176 u16 egress_pools_count;
177 u16 ingress_tc_count;
178 u16 egress_tc_count;
179 };
180
181 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
182 {
183 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
184 }
185
186 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
187 unsigned int sb_index)
188 {
189 struct devlink_sb *devlink_sb;
190
191 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
192 if (devlink_sb->index == sb_index)
193 return devlink_sb;
194 }
195 return NULL;
196 }
197
198 static bool devlink_sb_index_exists(struct devlink *devlink,
199 unsigned int sb_index)
200 {
201 return devlink_sb_get_by_index(devlink, sb_index);
202 }
203
204 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
205 struct nlattr **attrs)
206 {
207 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
208 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
209 struct devlink_sb *devlink_sb;
210
211 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
212 if (!devlink_sb)
213 return ERR_PTR(-ENODEV);
214 return devlink_sb;
215 }
216 return ERR_PTR(-EINVAL);
217 }
218
219 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
220 struct genl_info *info)
221 {
222 return devlink_sb_get_from_attrs(devlink, info->attrs);
223 }
224
225 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
226 struct nlattr **attrs,
227 u16 *p_pool_index)
228 {
229 u16 val;
230
231 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
232 return -EINVAL;
233
234 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
235 if (val >= devlink_sb_pool_count(devlink_sb))
236 return -EINVAL;
237 *p_pool_index = val;
238 return 0;
239 }
240
241 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
242 struct genl_info *info,
243 u16 *p_pool_index)
244 {
245 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
246 p_pool_index);
247 }
248
249 static int
250 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
251 enum devlink_sb_pool_type *p_pool_type)
252 {
253 u8 val;
254
255 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
256 return -EINVAL;
257
258 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
259 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
260 val != DEVLINK_SB_POOL_TYPE_EGRESS)
261 return -EINVAL;
262 *p_pool_type = val;
263 return 0;
264 }
265
266 static int
267 devlink_sb_pool_type_get_from_info(struct genl_info *info,
268 enum devlink_sb_pool_type *p_pool_type)
269 {
270 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
271 }
272
273 static int
274 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
275 enum devlink_sb_threshold_type *p_th_type)
276 {
277 u8 val;
278
279 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
280 return -EINVAL;
281
282 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
283 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
284 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
285 return -EINVAL;
286 *p_th_type = val;
287 return 0;
288 }
289
290 static int
291 devlink_sb_th_type_get_from_info(struct genl_info *info,
292 enum devlink_sb_threshold_type *p_th_type)
293 {
294 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
295 }
296
297 static int
298 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
299 struct nlattr **attrs,
300 enum devlink_sb_pool_type pool_type,
301 u16 *p_tc_index)
302 {
303 u16 val;
304
305 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
306 return -EINVAL;
307
308 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
309 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
310 val >= devlink_sb->ingress_tc_count)
311 return -EINVAL;
312 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
313 val >= devlink_sb->egress_tc_count)
314 return -EINVAL;
315 *p_tc_index = val;
316 return 0;
317 }
318
319 static int
320 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
321 struct genl_info *info,
322 enum devlink_sb_pool_type pool_type,
323 u16 *p_tc_index)
324 {
325 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
326 pool_type, p_tc_index);
327 }
328
329 struct devlink_region {
330 struct devlink *devlink;
331 struct list_head list;
332 const char *name;
333 struct list_head snapshot_list;
334 u32 max_snapshots;
335 u32 cur_snapshots;
336 u64 size;
337 };
338
339 struct devlink_snapshot {
340 struct list_head list;
341 struct devlink_region *region;
342 devlink_snapshot_data_dest_t *data_destructor;
343 u64 data_len;
344 u8 *data;
345 u32 id;
346 };
347
348 static struct devlink_region *
349 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
350 {
351 struct devlink_region *region;
352
353 list_for_each_entry(region, &devlink->region_list, list)
354 if (!strcmp(region->name, region_name))
355 return region;
356
357 return NULL;
358 }
359
360 static struct devlink_snapshot *
361 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
362 {
363 struct devlink_snapshot *snapshot;
364
365 list_for_each_entry(snapshot, &region->snapshot_list, list)
366 if (snapshot->id == id)
367 return snapshot;
368
369 return NULL;
370 }
371
372 static void devlink_region_snapshot_del(struct devlink_snapshot *snapshot)
373 {
374 snapshot->region->cur_snapshots--;
375 list_del(&snapshot->list);
376 (*snapshot->data_destructor)(snapshot->data);
377 kfree(snapshot);
378 }
379
380 #define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
381 #define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
382 #define DEVLINK_NL_FLAG_NEED_SB BIT(2)
383
384 /* The per devlink instance lock is taken by default in the pre-doit
385 * operation, yet several commands do not require this. The global
386 * devlink lock is taken and protects from disruption by user-calls.
387 */
388 #define DEVLINK_NL_FLAG_NO_LOCK BIT(3)
389
390 static int devlink_nl_pre_doit(const struct genl_ops *ops,
391 struct sk_buff *skb, struct genl_info *info)
392 {
393 struct devlink *devlink;
394 int err;
395
396 mutex_lock(&devlink_mutex);
397 devlink = devlink_get_from_info(info);
398 if (IS_ERR(devlink)) {
399 mutex_unlock(&devlink_mutex);
400 return PTR_ERR(devlink);
401 }
402 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
403 mutex_lock(&devlink->lock);
404 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
405 info->user_ptr[0] = devlink;
406 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
407 struct devlink_port *devlink_port;
408
409 devlink_port = devlink_port_get_from_info(devlink, info);
410 if (IS_ERR(devlink_port)) {
411 err = PTR_ERR(devlink_port);
412 goto unlock;
413 }
414 info->user_ptr[0] = devlink_port;
415 }
416 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
417 struct devlink_sb *devlink_sb;
418
419 devlink_sb = devlink_sb_get_from_info(devlink, info);
420 if (IS_ERR(devlink_sb)) {
421 err = PTR_ERR(devlink_sb);
422 goto unlock;
423 }
424 info->user_ptr[1] = devlink_sb;
425 }
426 return 0;
427
428 unlock:
429 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
430 mutex_unlock(&devlink->lock);
431 mutex_unlock(&devlink_mutex);
432 return err;
433 }
434
435 static void devlink_nl_post_doit(const struct genl_ops *ops,
436 struct sk_buff *skb, struct genl_info *info)
437 {
438 struct devlink *devlink;
439
440 devlink = devlink_get_from_info(info);
441 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
442 mutex_unlock(&devlink->lock);
443 mutex_unlock(&devlink_mutex);
444 }
445
446 static struct genl_family devlink_nl_family;
447
448 enum devlink_multicast_groups {
449 DEVLINK_MCGRP_CONFIG,
450 };
451
452 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
453 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
454 };
455
456 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
457 {
458 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
459 return -EMSGSIZE;
460 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
461 return -EMSGSIZE;
462 return 0;
463 }
464
465 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
466 enum devlink_command cmd, u32 portid,
467 u32 seq, int flags)
468 {
469 void *hdr;
470
471 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
472 if (!hdr)
473 return -EMSGSIZE;
474
475 if (devlink_nl_put_handle(msg, devlink))
476 goto nla_put_failure;
477
478 genlmsg_end(msg, hdr);
479 return 0;
480
481 nla_put_failure:
482 genlmsg_cancel(msg, hdr);
483 return -EMSGSIZE;
484 }
485
486 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
487 {
488 struct sk_buff *msg;
489 int err;
490
491 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
492
493 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
494 if (!msg)
495 return;
496
497 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
498 if (err) {
499 nlmsg_free(msg);
500 return;
501 }
502
503 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
504 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
505 }
506
507 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
508 struct devlink_port *devlink_port)
509 {
510 struct devlink_port_attrs *attrs = &devlink_port->attrs;
511
512 if (!attrs->set)
513 return 0;
514 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
515 return -EMSGSIZE;
516 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, attrs->port_number))
517 return -EMSGSIZE;
518 if (!attrs->split)
519 return 0;
520 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, attrs->port_number))
521 return -EMSGSIZE;
522 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
523 attrs->split_subport_number))
524 return -EMSGSIZE;
525 return 0;
526 }
527
528 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
529 struct devlink_port *devlink_port,
530 enum devlink_command cmd, u32 portid,
531 u32 seq, int flags)
532 {
533 void *hdr;
534
535 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
536 if (!hdr)
537 return -EMSGSIZE;
538
539 if (devlink_nl_put_handle(msg, devlink))
540 goto nla_put_failure;
541 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
542 goto nla_put_failure;
543 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
544 goto nla_put_failure;
545 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
546 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
547 devlink_port->desired_type))
548 goto nla_put_failure;
549 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
550 struct net_device *netdev = devlink_port->type_dev;
551
552 if (netdev &&
553 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
554 netdev->ifindex) ||
555 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
556 netdev->name)))
557 goto nla_put_failure;
558 }
559 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
560 struct ib_device *ibdev = devlink_port->type_dev;
561
562 if (ibdev &&
563 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
564 ibdev->name))
565 goto nla_put_failure;
566 }
567 if (devlink_nl_port_attrs_put(msg, devlink_port))
568 goto nla_put_failure;
569
570 genlmsg_end(msg, hdr);
571 return 0;
572
573 nla_put_failure:
574 genlmsg_cancel(msg, hdr);
575 return -EMSGSIZE;
576 }
577
578 static void devlink_port_notify(struct devlink_port *devlink_port,
579 enum devlink_command cmd)
580 {
581 struct devlink *devlink = devlink_port->devlink;
582 struct sk_buff *msg;
583 int err;
584
585 if (!devlink_port->registered)
586 return;
587
588 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
589
590 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
591 if (!msg)
592 return;
593
594 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
595 if (err) {
596 nlmsg_free(msg);
597 return;
598 }
599
600 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
601 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
602 }
603
604 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
605 {
606 struct devlink *devlink = info->user_ptr[0];
607 struct sk_buff *msg;
608 int err;
609
610 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
611 if (!msg)
612 return -ENOMEM;
613
614 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
615 info->snd_portid, info->snd_seq, 0);
616 if (err) {
617 nlmsg_free(msg);
618 return err;
619 }
620
621 return genlmsg_reply(msg, info);
622 }
623
624 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
625 struct netlink_callback *cb)
626 {
627 struct devlink *devlink;
628 int start = cb->args[0];
629 int idx = 0;
630 int err;
631
632 mutex_lock(&devlink_mutex);
633 list_for_each_entry(devlink, &devlink_list, list) {
634 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
635 continue;
636 if (idx < start) {
637 idx++;
638 continue;
639 }
640 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
641 NETLINK_CB(cb->skb).portid,
642 cb->nlh->nlmsg_seq, NLM_F_MULTI);
643 if (err)
644 goto out;
645 idx++;
646 }
647 out:
648 mutex_unlock(&devlink_mutex);
649
650 cb->args[0] = idx;
651 return msg->len;
652 }
653
654 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
655 struct genl_info *info)
656 {
657 struct devlink_port *devlink_port = info->user_ptr[0];
658 struct devlink *devlink = devlink_port->devlink;
659 struct sk_buff *msg;
660 int err;
661
662 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
663 if (!msg)
664 return -ENOMEM;
665
666 err = devlink_nl_port_fill(msg, devlink, devlink_port,
667 DEVLINK_CMD_PORT_NEW,
668 info->snd_portid, info->snd_seq, 0);
669 if (err) {
670 nlmsg_free(msg);
671 return err;
672 }
673
674 return genlmsg_reply(msg, info);
675 }
676
677 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
678 struct netlink_callback *cb)
679 {
680 struct devlink *devlink;
681 struct devlink_port *devlink_port;
682 int start = cb->args[0];
683 int idx = 0;
684 int err;
685
686 mutex_lock(&devlink_mutex);
687 list_for_each_entry(devlink, &devlink_list, list) {
688 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
689 continue;
690 mutex_lock(&devlink->lock);
691 list_for_each_entry(devlink_port, &devlink->port_list, list) {
692 if (idx < start) {
693 idx++;
694 continue;
695 }
696 err = devlink_nl_port_fill(msg, devlink, devlink_port,
697 DEVLINK_CMD_NEW,
698 NETLINK_CB(cb->skb).portid,
699 cb->nlh->nlmsg_seq,
700 NLM_F_MULTI);
701 if (err) {
702 mutex_unlock(&devlink->lock);
703 goto out;
704 }
705 idx++;
706 }
707 mutex_unlock(&devlink->lock);
708 }
709 out:
710 mutex_unlock(&devlink_mutex);
711
712 cb->args[0] = idx;
713 return msg->len;
714 }
715
716 static int devlink_port_type_set(struct devlink *devlink,
717 struct devlink_port *devlink_port,
718 enum devlink_port_type port_type)
719
720 {
721 int err;
722
723 if (devlink->ops && devlink->ops->port_type_set) {
724 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
725 return -EINVAL;
726 if (port_type == devlink_port->type)
727 return 0;
728 err = devlink->ops->port_type_set(devlink_port, port_type);
729 if (err)
730 return err;
731 devlink_port->desired_type = port_type;
732 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
733 return 0;
734 }
735 return -EOPNOTSUPP;
736 }
737
738 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
739 struct genl_info *info)
740 {
741 struct devlink_port *devlink_port = info->user_ptr[0];
742 struct devlink *devlink = devlink_port->devlink;
743 int err;
744
745 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
746 enum devlink_port_type port_type;
747
748 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
749 err = devlink_port_type_set(devlink, devlink_port, port_type);
750 if (err)
751 return err;
752 }
753 return 0;
754 }
755
756 static int devlink_port_split(struct devlink *devlink, u32 port_index,
757 u32 count, struct netlink_ext_ack *extack)
758
759 {
760 if (devlink->ops && devlink->ops->port_split)
761 return devlink->ops->port_split(devlink, port_index, count,
762 extack);
763 return -EOPNOTSUPP;
764 }
765
766 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
767 struct genl_info *info)
768 {
769 struct devlink *devlink = info->user_ptr[0];
770 u32 port_index;
771 u32 count;
772
773 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
774 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
775 return -EINVAL;
776
777 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
778 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
779 return devlink_port_split(devlink, port_index, count, info->extack);
780 }
781
782 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
783 struct netlink_ext_ack *extack)
784
785 {
786 if (devlink->ops && devlink->ops->port_unsplit)
787 return devlink->ops->port_unsplit(devlink, port_index, extack);
788 return -EOPNOTSUPP;
789 }
790
791 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
792 struct genl_info *info)
793 {
794 struct devlink *devlink = info->user_ptr[0];
795 u32 port_index;
796
797 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
798 return -EINVAL;
799
800 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
801 return devlink_port_unsplit(devlink, port_index, info->extack);
802 }
803
804 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
805 struct devlink_sb *devlink_sb,
806 enum devlink_command cmd, u32 portid,
807 u32 seq, int flags)
808 {
809 void *hdr;
810
811 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
812 if (!hdr)
813 return -EMSGSIZE;
814
815 if (devlink_nl_put_handle(msg, devlink))
816 goto nla_put_failure;
817 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
818 goto nla_put_failure;
819 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
820 goto nla_put_failure;
821 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
822 devlink_sb->ingress_pools_count))
823 goto nla_put_failure;
824 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
825 devlink_sb->egress_pools_count))
826 goto nla_put_failure;
827 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
828 devlink_sb->ingress_tc_count))
829 goto nla_put_failure;
830 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
831 devlink_sb->egress_tc_count))
832 goto nla_put_failure;
833
834 genlmsg_end(msg, hdr);
835 return 0;
836
837 nla_put_failure:
838 genlmsg_cancel(msg, hdr);
839 return -EMSGSIZE;
840 }
841
842 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
843 struct genl_info *info)
844 {
845 struct devlink *devlink = info->user_ptr[0];
846 struct devlink_sb *devlink_sb = info->user_ptr[1];
847 struct sk_buff *msg;
848 int err;
849
850 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
851 if (!msg)
852 return -ENOMEM;
853
854 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
855 DEVLINK_CMD_SB_NEW,
856 info->snd_portid, info->snd_seq, 0);
857 if (err) {
858 nlmsg_free(msg);
859 return err;
860 }
861
862 return genlmsg_reply(msg, info);
863 }
864
865 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
866 struct netlink_callback *cb)
867 {
868 struct devlink *devlink;
869 struct devlink_sb *devlink_sb;
870 int start = cb->args[0];
871 int idx = 0;
872 int err;
873
874 mutex_lock(&devlink_mutex);
875 list_for_each_entry(devlink, &devlink_list, list) {
876 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
877 continue;
878 mutex_lock(&devlink->lock);
879 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
880 if (idx < start) {
881 idx++;
882 continue;
883 }
884 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
885 DEVLINK_CMD_SB_NEW,
886 NETLINK_CB(cb->skb).portid,
887 cb->nlh->nlmsg_seq,
888 NLM_F_MULTI);
889 if (err) {
890 mutex_unlock(&devlink->lock);
891 goto out;
892 }
893 idx++;
894 }
895 mutex_unlock(&devlink->lock);
896 }
897 out:
898 mutex_unlock(&devlink_mutex);
899
900 cb->args[0] = idx;
901 return msg->len;
902 }
903
904 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
905 struct devlink_sb *devlink_sb,
906 u16 pool_index, enum devlink_command cmd,
907 u32 portid, u32 seq, int flags)
908 {
909 struct devlink_sb_pool_info pool_info;
910 void *hdr;
911 int err;
912
913 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
914 pool_index, &pool_info);
915 if (err)
916 return err;
917
918 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
919 if (!hdr)
920 return -EMSGSIZE;
921
922 if (devlink_nl_put_handle(msg, devlink))
923 goto nla_put_failure;
924 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
925 goto nla_put_failure;
926 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
927 goto nla_put_failure;
928 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
929 goto nla_put_failure;
930 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
931 goto nla_put_failure;
932 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
933 pool_info.threshold_type))
934 goto nla_put_failure;
935
936 genlmsg_end(msg, hdr);
937 return 0;
938
939 nla_put_failure:
940 genlmsg_cancel(msg, hdr);
941 return -EMSGSIZE;
942 }
943
944 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
945 struct genl_info *info)
946 {
947 struct devlink *devlink = info->user_ptr[0];
948 struct devlink_sb *devlink_sb = info->user_ptr[1];
949 struct sk_buff *msg;
950 u16 pool_index;
951 int err;
952
953 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
954 &pool_index);
955 if (err)
956 return err;
957
958 if (!devlink->ops || !devlink->ops->sb_pool_get)
959 return -EOPNOTSUPP;
960
961 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
962 if (!msg)
963 return -ENOMEM;
964
965 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
966 DEVLINK_CMD_SB_POOL_NEW,
967 info->snd_portid, info->snd_seq, 0);
968 if (err) {
969 nlmsg_free(msg);
970 return err;
971 }
972
973 return genlmsg_reply(msg, info);
974 }
975
976 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
977 struct devlink *devlink,
978 struct devlink_sb *devlink_sb,
979 u32 portid, u32 seq)
980 {
981 u16 pool_count = devlink_sb_pool_count(devlink_sb);
982 u16 pool_index;
983 int err;
984
985 for (pool_index = 0; pool_index < pool_count; pool_index++) {
986 if (*p_idx < start) {
987 (*p_idx)++;
988 continue;
989 }
990 err = devlink_nl_sb_pool_fill(msg, devlink,
991 devlink_sb,
992 pool_index,
993 DEVLINK_CMD_SB_POOL_NEW,
994 portid, seq, NLM_F_MULTI);
995 if (err)
996 return err;
997 (*p_idx)++;
998 }
999 return 0;
1000 }
1001
1002 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1003 struct netlink_callback *cb)
1004 {
1005 struct devlink *devlink;
1006 struct devlink_sb *devlink_sb;
1007 int start = cb->args[0];
1008 int idx = 0;
1009 int err;
1010
1011 mutex_lock(&devlink_mutex);
1012 list_for_each_entry(devlink, &devlink_list, list) {
1013 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1014 !devlink->ops || !devlink->ops->sb_pool_get)
1015 continue;
1016 mutex_lock(&devlink->lock);
1017 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1018 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1019 devlink_sb,
1020 NETLINK_CB(cb->skb).portid,
1021 cb->nlh->nlmsg_seq);
1022 if (err && err != -EOPNOTSUPP) {
1023 mutex_unlock(&devlink->lock);
1024 goto out;
1025 }
1026 }
1027 mutex_unlock(&devlink->lock);
1028 }
1029 out:
1030 mutex_unlock(&devlink_mutex);
1031
1032 cb->args[0] = idx;
1033 return msg->len;
1034 }
1035
1036 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1037 u16 pool_index, u32 size,
1038 enum devlink_sb_threshold_type threshold_type)
1039
1040 {
1041 const struct devlink_ops *ops = devlink->ops;
1042
1043 if (ops && ops->sb_pool_set)
1044 return ops->sb_pool_set(devlink, sb_index, pool_index,
1045 size, threshold_type);
1046 return -EOPNOTSUPP;
1047 }
1048
1049 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1050 struct genl_info *info)
1051 {
1052 struct devlink *devlink = info->user_ptr[0];
1053 struct devlink_sb *devlink_sb = info->user_ptr[1];
1054 enum devlink_sb_threshold_type threshold_type;
1055 u16 pool_index;
1056 u32 size;
1057 int err;
1058
1059 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1060 &pool_index);
1061 if (err)
1062 return err;
1063
1064 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1065 if (err)
1066 return err;
1067
1068 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1069 return -EINVAL;
1070
1071 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1072 return devlink_sb_pool_set(devlink, devlink_sb->index,
1073 pool_index, size, threshold_type);
1074 }
1075
1076 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1077 struct devlink *devlink,
1078 struct devlink_port *devlink_port,
1079 struct devlink_sb *devlink_sb,
1080 u16 pool_index,
1081 enum devlink_command cmd,
1082 u32 portid, u32 seq, int flags)
1083 {
1084 const struct devlink_ops *ops = devlink->ops;
1085 u32 threshold;
1086 void *hdr;
1087 int err;
1088
1089 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1090 pool_index, &threshold);
1091 if (err)
1092 return err;
1093
1094 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1095 if (!hdr)
1096 return -EMSGSIZE;
1097
1098 if (devlink_nl_put_handle(msg, devlink))
1099 goto nla_put_failure;
1100 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1101 goto nla_put_failure;
1102 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1103 goto nla_put_failure;
1104 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1105 goto nla_put_failure;
1106 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1107 goto nla_put_failure;
1108
1109 if (ops->sb_occ_port_pool_get) {
1110 u32 cur;
1111 u32 max;
1112
1113 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1114 pool_index, &cur, &max);
1115 if (err && err != -EOPNOTSUPP)
1116 return err;
1117 if (!err) {
1118 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1119 goto nla_put_failure;
1120 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1121 goto nla_put_failure;
1122 }
1123 }
1124
1125 genlmsg_end(msg, hdr);
1126 return 0;
1127
1128 nla_put_failure:
1129 genlmsg_cancel(msg, hdr);
1130 return -EMSGSIZE;
1131 }
1132
1133 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1134 struct genl_info *info)
1135 {
1136 struct devlink_port *devlink_port = info->user_ptr[0];
1137 struct devlink *devlink = devlink_port->devlink;
1138 struct devlink_sb *devlink_sb = info->user_ptr[1];
1139 struct sk_buff *msg;
1140 u16 pool_index;
1141 int err;
1142
1143 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1144 &pool_index);
1145 if (err)
1146 return err;
1147
1148 if (!devlink->ops || !devlink->ops->sb_port_pool_get)
1149 return -EOPNOTSUPP;
1150
1151 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1152 if (!msg)
1153 return -ENOMEM;
1154
1155 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1156 devlink_sb, pool_index,
1157 DEVLINK_CMD_SB_PORT_POOL_NEW,
1158 info->snd_portid, info->snd_seq, 0);
1159 if (err) {
1160 nlmsg_free(msg);
1161 return err;
1162 }
1163
1164 return genlmsg_reply(msg, info);
1165 }
1166
1167 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1168 struct devlink *devlink,
1169 struct devlink_sb *devlink_sb,
1170 u32 portid, u32 seq)
1171 {
1172 struct devlink_port *devlink_port;
1173 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1174 u16 pool_index;
1175 int err;
1176
1177 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1178 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1179 if (*p_idx < start) {
1180 (*p_idx)++;
1181 continue;
1182 }
1183 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1184 devlink_port,
1185 devlink_sb,
1186 pool_index,
1187 DEVLINK_CMD_SB_PORT_POOL_NEW,
1188 portid, seq,
1189 NLM_F_MULTI);
1190 if (err)
1191 return err;
1192 (*p_idx)++;
1193 }
1194 }
1195 return 0;
1196 }
1197
1198 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1199 struct netlink_callback *cb)
1200 {
1201 struct devlink *devlink;
1202 struct devlink_sb *devlink_sb;
1203 int start = cb->args[0];
1204 int idx = 0;
1205 int err;
1206
1207 mutex_lock(&devlink_mutex);
1208 list_for_each_entry(devlink, &devlink_list, list) {
1209 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1210 !devlink->ops || !devlink->ops->sb_port_pool_get)
1211 continue;
1212 mutex_lock(&devlink->lock);
1213 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1214 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1215 devlink, devlink_sb,
1216 NETLINK_CB(cb->skb).portid,
1217 cb->nlh->nlmsg_seq);
1218 if (err && err != -EOPNOTSUPP) {
1219 mutex_unlock(&devlink->lock);
1220 goto out;
1221 }
1222 }
1223 mutex_unlock(&devlink->lock);
1224 }
1225 out:
1226 mutex_unlock(&devlink_mutex);
1227
1228 cb->args[0] = idx;
1229 return msg->len;
1230 }
1231
1232 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1233 unsigned int sb_index, u16 pool_index,
1234 u32 threshold)
1235
1236 {
1237 const struct devlink_ops *ops = devlink_port->devlink->ops;
1238
1239 if (ops && ops->sb_port_pool_set)
1240 return ops->sb_port_pool_set(devlink_port, sb_index,
1241 pool_index, threshold);
1242 return -EOPNOTSUPP;
1243 }
1244
1245 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1246 struct genl_info *info)
1247 {
1248 struct devlink_port *devlink_port = info->user_ptr[0];
1249 struct devlink_sb *devlink_sb = info->user_ptr[1];
1250 u16 pool_index;
1251 u32 threshold;
1252 int err;
1253
1254 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1255 &pool_index);
1256 if (err)
1257 return err;
1258
1259 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1260 return -EINVAL;
1261
1262 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1263 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1264 pool_index, threshold);
1265 }
1266
1267 static int
1268 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1269 struct devlink_port *devlink_port,
1270 struct devlink_sb *devlink_sb, u16 tc_index,
1271 enum devlink_sb_pool_type pool_type,
1272 enum devlink_command cmd,
1273 u32 portid, u32 seq, int flags)
1274 {
1275 const struct devlink_ops *ops = devlink->ops;
1276 u16 pool_index;
1277 u32 threshold;
1278 void *hdr;
1279 int err;
1280
1281 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1282 tc_index, pool_type,
1283 &pool_index, &threshold);
1284 if (err)
1285 return err;
1286
1287 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1288 if (!hdr)
1289 return -EMSGSIZE;
1290
1291 if (devlink_nl_put_handle(msg, devlink))
1292 goto nla_put_failure;
1293 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1294 goto nla_put_failure;
1295 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1296 goto nla_put_failure;
1297 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1298 goto nla_put_failure;
1299 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1300 goto nla_put_failure;
1301 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1302 goto nla_put_failure;
1303 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1304 goto nla_put_failure;
1305
1306 if (ops->sb_occ_tc_port_bind_get) {
1307 u32 cur;
1308 u32 max;
1309
1310 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1311 devlink_sb->index,
1312 tc_index, pool_type,
1313 &cur, &max);
1314 if (err && err != -EOPNOTSUPP)
1315 return err;
1316 if (!err) {
1317 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1318 goto nla_put_failure;
1319 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1320 goto nla_put_failure;
1321 }
1322 }
1323
1324 genlmsg_end(msg, hdr);
1325 return 0;
1326
1327 nla_put_failure:
1328 genlmsg_cancel(msg, hdr);
1329 return -EMSGSIZE;
1330 }
1331
1332 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1333 struct genl_info *info)
1334 {
1335 struct devlink_port *devlink_port = info->user_ptr[0];
1336 struct devlink *devlink = devlink_port->devlink;
1337 struct devlink_sb *devlink_sb = info->user_ptr[1];
1338 struct sk_buff *msg;
1339 enum devlink_sb_pool_type pool_type;
1340 u16 tc_index;
1341 int err;
1342
1343 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1344 if (err)
1345 return err;
1346
1347 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1348 pool_type, &tc_index);
1349 if (err)
1350 return err;
1351
1352 if (!devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1353 return -EOPNOTSUPP;
1354
1355 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1356 if (!msg)
1357 return -ENOMEM;
1358
1359 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1360 devlink_sb, tc_index, pool_type,
1361 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1362 info->snd_portid,
1363 info->snd_seq, 0);
1364 if (err) {
1365 nlmsg_free(msg);
1366 return err;
1367 }
1368
1369 return genlmsg_reply(msg, info);
1370 }
1371
1372 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1373 int start, int *p_idx,
1374 struct devlink *devlink,
1375 struct devlink_sb *devlink_sb,
1376 u32 portid, u32 seq)
1377 {
1378 struct devlink_port *devlink_port;
1379 u16 tc_index;
1380 int err;
1381
1382 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1383 for (tc_index = 0;
1384 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1385 if (*p_idx < start) {
1386 (*p_idx)++;
1387 continue;
1388 }
1389 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1390 devlink_port,
1391 devlink_sb,
1392 tc_index,
1393 DEVLINK_SB_POOL_TYPE_INGRESS,
1394 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1395 portid, seq,
1396 NLM_F_MULTI);
1397 if (err)
1398 return err;
1399 (*p_idx)++;
1400 }
1401 for (tc_index = 0;
1402 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1403 if (*p_idx < start) {
1404 (*p_idx)++;
1405 continue;
1406 }
1407 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1408 devlink_port,
1409 devlink_sb,
1410 tc_index,
1411 DEVLINK_SB_POOL_TYPE_EGRESS,
1412 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1413 portid, seq,
1414 NLM_F_MULTI);
1415 if (err)
1416 return err;
1417 (*p_idx)++;
1418 }
1419 }
1420 return 0;
1421 }
1422
1423 static int
1424 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1425 struct netlink_callback *cb)
1426 {
1427 struct devlink *devlink;
1428 struct devlink_sb *devlink_sb;
1429 int start = cb->args[0];
1430 int idx = 0;
1431 int err;
1432
1433 mutex_lock(&devlink_mutex);
1434 list_for_each_entry(devlink, &devlink_list, list) {
1435 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1436 !devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1437 continue;
1438
1439 mutex_lock(&devlink->lock);
1440 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1441 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1442 devlink,
1443 devlink_sb,
1444 NETLINK_CB(cb->skb).portid,
1445 cb->nlh->nlmsg_seq);
1446 if (err && err != -EOPNOTSUPP) {
1447 mutex_unlock(&devlink->lock);
1448 goto out;
1449 }
1450 }
1451 mutex_unlock(&devlink->lock);
1452 }
1453 out:
1454 mutex_unlock(&devlink_mutex);
1455
1456 cb->args[0] = idx;
1457 return msg->len;
1458 }
1459
1460 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1461 unsigned int sb_index, u16 tc_index,
1462 enum devlink_sb_pool_type pool_type,
1463 u16 pool_index, u32 threshold)
1464
1465 {
1466 const struct devlink_ops *ops = devlink_port->devlink->ops;
1467
1468 if (ops && ops->sb_tc_pool_bind_set)
1469 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1470 tc_index, pool_type,
1471 pool_index, threshold);
1472 return -EOPNOTSUPP;
1473 }
1474
1475 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1476 struct genl_info *info)
1477 {
1478 struct devlink_port *devlink_port = info->user_ptr[0];
1479 struct devlink_sb *devlink_sb = info->user_ptr[1];
1480 enum devlink_sb_pool_type pool_type;
1481 u16 tc_index;
1482 u16 pool_index;
1483 u32 threshold;
1484 int err;
1485
1486 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1487 if (err)
1488 return err;
1489
1490 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1491 pool_type, &tc_index);
1492 if (err)
1493 return err;
1494
1495 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1496 &pool_index);
1497 if (err)
1498 return err;
1499
1500 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1501 return -EINVAL;
1502
1503 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1504 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1505 tc_index, pool_type,
1506 pool_index, threshold);
1507 }
1508
1509 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1510 struct genl_info *info)
1511 {
1512 struct devlink *devlink = info->user_ptr[0];
1513 struct devlink_sb *devlink_sb = info->user_ptr[1];
1514 const struct devlink_ops *ops = devlink->ops;
1515
1516 if (ops && ops->sb_occ_snapshot)
1517 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1518 return -EOPNOTSUPP;
1519 }
1520
1521 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1522 struct genl_info *info)
1523 {
1524 struct devlink *devlink = info->user_ptr[0];
1525 struct devlink_sb *devlink_sb = info->user_ptr[1];
1526 const struct devlink_ops *ops = devlink->ops;
1527
1528 if (ops && ops->sb_occ_max_clear)
1529 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1530 return -EOPNOTSUPP;
1531 }
1532
1533 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1534 enum devlink_command cmd, u32 portid,
1535 u32 seq, int flags)
1536 {
1537 const struct devlink_ops *ops = devlink->ops;
1538 u8 inline_mode, encap_mode;
1539 void *hdr;
1540 int err = 0;
1541 u16 mode;
1542
1543 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1544 if (!hdr)
1545 return -EMSGSIZE;
1546
1547 err = devlink_nl_put_handle(msg, devlink);
1548 if (err)
1549 goto nla_put_failure;
1550
1551 if (ops->eswitch_mode_get) {
1552 err = ops->eswitch_mode_get(devlink, &mode);
1553 if (err)
1554 goto nla_put_failure;
1555 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1556 if (err)
1557 goto nla_put_failure;
1558 }
1559
1560 if (ops->eswitch_inline_mode_get) {
1561 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1562 if (err)
1563 goto nla_put_failure;
1564 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1565 inline_mode);
1566 if (err)
1567 goto nla_put_failure;
1568 }
1569
1570 if (ops->eswitch_encap_mode_get) {
1571 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1572 if (err)
1573 goto nla_put_failure;
1574 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1575 if (err)
1576 goto nla_put_failure;
1577 }
1578
1579 genlmsg_end(msg, hdr);
1580 return 0;
1581
1582 nla_put_failure:
1583 genlmsg_cancel(msg, hdr);
1584 return err;
1585 }
1586
1587 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1588 struct genl_info *info)
1589 {
1590 struct devlink *devlink = info->user_ptr[0];
1591 const struct devlink_ops *ops = devlink->ops;
1592 struct sk_buff *msg;
1593 int err;
1594
1595 if (!ops)
1596 return -EOPNOTSUPP;
1597
1598 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1599 if (!msg)
1600 return -ENOMEM;
1601
1602 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1603 info->snd_portid, info->snd_seq, 0);
1604
1605 if (err) {
1606 nlmsg_free(msg);
1607 return err;
1608 }
1609
1610 return genlmsg_reply(msg, info);
1611 }
1612
1613 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1614 struct genl_info *info)
1615 {
1616 struct devlink *devlink = info->user_ptr[0];
1617 const struct devlink_ops *ops = devlink->ops;
1618 u8 inline_mode, encap_mode;
1619 int err = 0;
1620 u16 mode;
1621
1622 if (!ops)
1623 return -EOPNOTSUPP;
1624
1625 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1626 if (!ops->eswitch_mode_set)
1627 return -EOPNOTSUPP;
1628 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1629 err = ops->eswitch_mode_set(devlink, mode);
1630 if (err)
1631 return err;
1632 }
1633
1634 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1635 if (!ops->eswitch_inline_mode_set)
1636 return -EOPNOTSUPP;
1637 inline_mode = nla_get_u8(
1638 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1639 err = ops->eswitch_inline_mode_set(devlink, inline_mode);
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 if (err)
1650 return err;
1651 }
1652
1653 return 0;
1654 }
1655
1656 int devlink_dpipe_match_put(struct sk_buff *skb,
1657 struct devlink_dpipe_match *match)
1658 {
1659 struct devlink_dpipe_header *header = match->header;
1660 struct devlink_dpipe_field *field = &header->fields[match->field_id];
1661 struct nlattr *match_attr;
1662
1663 match_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_MATCH);
1664 if (!match_attr)
1665 return -EMSGSIZE;
1666
1667 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1668 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1669 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1670 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1671 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1672 goto nla_put_failure;
1673
1674 nla_nest_end(skb, match_attr);
1675 return 0;
1676
1677 nla_put_failure:
1678 nla_nest_cancel(skb, match_attr);
1679 return -EMSGSIZE;
1680 }
1681 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1682
1683 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1684 struct sk_buff *skb)
1685 {
1686 struct nlattr *matches_attr;
1687
1688 matches_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1689 if (!matches_attr)
1690 return -EMSGSIZE;
1691
1692 if (table->table_ops->matches_dump(table->priv, skb))
1693 goto nla_put_failure;
1694
1695 nla_nest_end(skb, matches_attr);
1696 return 0;
1697
1698 nla_put_failure:
1699 nla_nest_cancel(skb, matches_attr);
1700 return -EMSGSIZE;
1701 }
1702
1703 int devlink_dpipe_action_put(struct sk_buff *skb,
1704 struct devlink_dpipe_action *action)
1705 {
1706 struct devlink_dpipe_header *header = action->header;
1707 struct devlink_dpipe_field *field = &header->fields[action->field_id];
1708 struct nlattr *action_attr;
1709
1710 action_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ACTION);
1711 if (!action_attr)
1712 return -EMSGSIZE;
1713
1714 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1715 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1716 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1717 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1718 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1719 goto nla_put_failure;
1720
1721 nla_nest_end(skb, action_attr);
1722 return 0;
1723
1724 nla_put_failure:
1725 nla_nest_cancel(skb, action_attr);
1726 return -EMSGSIZE;
1727 }
1728 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1729
1730 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1731 struct sk_buff *skb)
1732 {
1733 struct nlattr *actions_attr;
1734
1735 actions_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1736 if (!actions_attr)
1737 return -EMSGSIZE;
1738
1739 if (table->table_ops->actions_dump(table->priv, skb))
1740 goto nla_put_failure;
1741
1742 nla_nest_end(skb, actions_attr);
1743 return 0;
1744
1745 nla_put_failure:
1746 nla_nest_cancel(skb, actions_attr);
1747 return -EMSGSIZE;
1748 }
1749
1750 static int devlink_dpipe_table_put(struct sk_buff *skb,
1751 struct devlink_dpipe_table *table)
1752 {
1753 struct nlattr *table_attr;
1754 u64 table_size;
1755
1756 table_size = table->table_ops->size_get(table->priv);
1757 table_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE);
1758 if (!table_attr)
1759 return -EMSGSIZE;
1760
1761 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1762 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1763 DEVLINK_ATTR_PAD))
1764 goto nla_put_failure;
1765 if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1766 table->counters_enabled))
1767 goto nla_put_failure;
1768
1769 if (table->resource_valid) {
1770 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1771 table->resource_id, DEVLINK_ATTR_PAD) ||
1772 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1773 table->resource_units, DEVLINK_ATTR_PAD))
1774 goto nla_put_failure;
1775 }
1776 if (devlink_dpipe_matches_put(table, skb))
1777 goto nla_put_failure;
1778
1779 if (devlink_dpipe_actions_put(table, skb))
1780 goto nla_put_failure;
1781
1782 nla_nest_end(skb, table_attr);
1783 return 0;
1784
1785 nla_put_failure:
1786 nla_nest_cancel(skb, table_attr);
1787 return -EMSGSIZE;
1788 }
1789
1790 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1791 struct genl_info *info)
1792 {
1793 int err;
1794
1795 if (*pskb) {
1796 err = genlmsg_reply(*pskb, info);
1797 if (err)
1798 return err;
1799 }
1800 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1801 if (!*pskb)
1802 return -ENOMEM;
1803 return 0;
1804 }
1805
1806 static int devlink_dpipe_tables_fill(struct genl_info *info,
1807 enum devlink_command cmd, int flags,
1808 struct list_head *dpipe_tables,
1809 const char *table_name)
1810 {
1811 struct devlink *devlink = info->user_ptr[0];
1812 struct devlink_dpipe_table *table;
1813 struct nlattr *tables_attr;
1814 struct sk_buff *skb = NULL;
1815 struct nlmsghdr *nlh;
1816 bool incomplete;
1817 void *hdr;
1818 int i;
1819 int err;
1820
1821 table = list_first_entry(dpipe_tables,
1822 struct devlink_dpipe_table, list);
1823 start_again:
1824 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1825 if (err)
1826 return err;
1827
1828 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1829 &devlink_nl_family, NLM_F_MULTI, cmd);
1830 if (!hdr) {
1831 nlmsg_free(skb);
1832 return -EMSGSIZE;
1833 }
1834
1835 if (devlink_nl_put_handle(skb, devlink))
1836 goto nla_put_failure;
1837 tables_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLES);
1838 if (!tables_attr)
1839 goto nla_put_failure;
1840
1841 i = 0;
1842 incomplete = false;
1843 list_for_each_entry_from(table, dpipe_tables, list) {
1844 if (!table_name) {
1845 err = devlink_dpipe_table_put(skb, table);
1846 if (err) {
1847 if (!i)
1848 goto err_table_put;
1849 incomplete = true;
1850 break;
1851 }
1852 } else {
1853 if (!strcmp(table->name, table_name)) {
1854 err = devlink_dpipe_table_put(skb, table);
1855 if (err)
1856 break;
1857 }
1858 }
1859 i++;
1860 }
1861
1862 nla_nest_end(skb, tables_attr);
1863 genlmsg_end(skb, hdr);
1864 if (incomplete)
1865 goto start_again;
1866
1867 send_done:
1868 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1869 NLMSG_DONE, 0, flags | NLM_F_MULTI);
1870 if (!nlh) {
1871 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1872 if (err)
1873 return err;
1874 goto send_done;
1875 }
1876
1877 return genlmsg_reply(skb, info);
1878
1879 nla_put_failure:
1880 err = -EMSGSIZE;
1881 err_table_put:
1882 nlmsg_free(skb);
1883 return err;
1884 }
1885
1886 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1887 struct genl_info *info)
1888 {
1889 struct devlink *devlink = info->user_ptr[0];
1890 const char *table_name = NULL;
1891
1892 if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1893 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1894
1895 return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1896 &devlink->dpipe_table_list,
1897 table_name);
1898 }
1899
1900 static int devlink_dpipe_value_put(struct sk_buff *skb,
1901 struct devlink_dpipe_value *value)
1902 {
1903 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1904 value->value_size, value->value))
1905 return -EMSGSIZE;
1906 if (value->mask)
1907 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1908 value->value_size, value->mask))
1909 return -EMSGSIZE;
1910 if (value->mapping_valid)
1911 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1912 value->mapping_value))
1913 return -EMSGSIZE;
1914 return 0;
1915 }
1916
1917 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1918 struct devlink_dpipe_value *value)
1919 {
1920 if (!value->action)
1921 return -EINVAL;
1922 if (devlink_dpipe_action_put(skb, value->action))
1923 return -EMSGSIZE;
1924 if (devlink_dpipe_value_put(skb, value))
1925 return -EMSGSIZE;
1926 return 0;
1927 }
1928
1929 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1930 struct devlink_dpipe_value *values,
1931 unsigned int values_count)
1932 {
1933 struct nlattr *action_attr;
1934 int i;
1935 int err;
1936
1937 for (i = 0; i < values_count; i++) {
1938 action_attr = nla_nest_start(skb,
1939 DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1940 if (!action_attr)
1941 return -EMSGSIZE;
1942 err = devlink_dpipe_action_value_put(skb, &values[i]);
1943 if (err)
1944 goto err_action_value_put;
1945 nla_nest_end(skb, action_attr);
1946 }
1947 return 0;
1948
1949 err_action_value_put:
1950 nla_nest_cancel(skb, action_attr);
1951 return err;
1952 }
1953
1954 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
1955 struct devlink_dpipe_value *value)
1956 {
1957 if (!value->match)
1958 return -EINVAL;
1959 if (devlink_dpipe_match_put(skb, value->match))
1960 return -EMSGSIZE;
1961 if (devlink_dpipe_value_put(skb, value))
1962 return -EMSGSIZE;
1963 return 0;
1964 }
1965
1966 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
1967 struct devlink_dpipe_value *values,
1968 unsigned int values_count)
1969 {
1970 struct nlattr *match_attr;
1971 int i;
1972 int err;
1973
1974 for (i = 0; i < values_count; i++) {
1975 match_attr = nla_nest_start(skb,
1976 DEVLINK_ATTR_DPIPE_MATCH_VALUE);
1977 if (!match_attr)
1978 return -EMSGSIZE;
1979 err = devlink_dpipe_match_value_put(skb, &values[i]);
1980 if (err)
1981 goto err_match_value_put;
1982 nla_nest_end(skb, match_attr);
1983 }
1984 return 0;
1985
1986 err_match_value_put:
1987 nla_nest_cancel(skb, match_attr);
1988 return err;
1989 }
1990
1991 static int devlink_dpipe_entry_put(struct sk_buff *skb,
1992 struct devlink_dpipe_entry *entry)
1993 {
1994 struct nlattr *entry_attr, *matches_attr, *actions_attr;
1995 int err;
1996
1997 entry_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ENTRY);
1998 if (!entry_attr)
1999 return -EMSGSIZE;
2000
2001 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2002 DEVLINK_ATTR_PAD))
2003 goto nla_put_failure;
2004 if (entry->counter_valid)
2005 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2006 entry->counter, DEVLINK_ATTR_PAD))
2007 goto nla_put_failure;
2008
2009 matches_attr = nla_nest_start(skb,
2010 DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2011 if (!matches_attr)
2012 goto nla_put_failure;
2013
2014 err = devlink_dpipe_match_values_put(skb, entry->match_values,
2015 entry->match_values_count);
2016 if (err) {
2017 nla_nest_cancel(skb, matches_attr);
2018 goto err_match_values_put;
2019 }
2020 nla_nest_end(skb, matches_attr);
2021
2022 actions_attr = nla_nest_start(skb,
2023 DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2024 if (!actions_attr)
2025 goto nla_put_failure;
2026
2027 err = devlink_dpipe_action_values_put(skb, entry->action_values,
2028 entry->action_values_count);
2029 if (err) {
2030 nla_nest_cancel(skb, actions_attr);
2031 goto err_action_values_put;
2032 }
2033 nla_nest_end(skb, actions_attr);
2034
2035 nla_nest_end(skb, entry_attr);
2036 return 0;
2037
2038 nla_put_failure:
2039 err = -EMSGSIZE;
2040 err_match_values_put:
2041 err_action_values_put:
2042 nla_nest_cancel(skb, entry_attr);
2043 return err;
2044 }
2045
2046 static struct devlink_dpipe_table *
2047 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2048 const char *table_name)
2049 {
2050 struct devlink_dpipe_table *table;
2051
2052 list_for_each_entry_rcu(table, dpipe_tables, list) {
2053 if (!strcmp(table->name, table_name))
2054 return table;
2055 }
2056 return NULL;
2057 }
2058
2059 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2060 {
2061 struct devlink *devlink;
2062 int err;
2063
2064 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2065 dump_ctx->info);
2066 if (err)
2067 return err;
2068
2069 dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2070 dump_ctx->info->snd_portid,
2071 dump_ctx->info->snd_seq,
2072 &devlink_nl_family, NLM_F_MULTI,
2073 dump_ctx->cmd);
2074 if (!dump_ctx->hdr)
2075 goto nla_put_failure;
2076
2077 devlink = dump_ctx->info->user_ptr[0];
2078 if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2079 goto nla_put_failure;
2080 dump_ctx->nest = nla_nest_start(dump_ctx->skb,
2081 DEVLINK_ATTR_DPIPE_ENTRIES);
2082 if (!dump_ctx->nest)
2083 goto nla_put_failure;
2084 return 0;
2085
2086 nla_put_failure:
2087 nlmsg_free(dump_ctx->skb);
2088 return -EMSGSIZE;
2089 }
2090 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2091
2092 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2093 struct devlink_dpipe_entry *entry)
2094 {
2095 return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2096 }
2097 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2098
2099 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2100 {
2101 nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2102 genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2103 return 0;
2104 }
2105 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2106
2107 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2108
2109 {
2110 unsigned int value_count, value_index;
2111 struct devlink_dpipe_value *value;
2112
2113 value = entry->action_values;
2114 value_count = entry->action_values_count;
2115 for (value_index = 0; value_index < value_count; value_index++) {
2116 kfree(value[value_index].value);
2117 kfree(value[value_index].mask);
2118 }
2119
2120 value = entry->match_values;
2121 value_count = entry->match_values_count;
2122 for (value_index = 0; value_index < value_count; value_index++) {
2123 kfree(value[value_index].value);
2124 kfree(value[value_index].mask);
2125 }
2126 }
2127 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2128
2129 static int devlink_dpipe_entries_fill(struct genl_info *info,
2130 enum devlink_command cmd, int flags,
2131 struct devlink_dpipe_table *table)
2132 {
2133 struct devlink_dpipe_dump_ctx dump_ctx;
2134 struct nlmsghdr *nlh;
2135 int err;
2136
2137 dump_ctx.skb = NULL;
2138 dump_ctx.cmd = cmd;
2139 dump_ctx.info = info;
2140
2141 err = table->table_ops->entries_dump(table->priv,
2142 table->counters_enabled,
2143 &dump_ctx);
2144 if (err)
2145 return err;
2146
2147 send_done:
2148 nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2149 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2150 if (!nlh) {
2151 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2152 if (err)
2153 return err;
2154 goto send_done;
2155 }
2156 return genlmsg_reply(dump_ctx.skb, info);
2157 }
2158
2159 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2160 struct genl_info *info)
2161 {
2162 struct devlink *devlink = info->user_ptr[0];
2163 struct devlink_dpipe_table *table;
2164 const char *table_name;
2165
2166 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2167 return -EINVAL;
2168
2169 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2170 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2171 table_name);
2172 if (!table)
2173 return -EINVAL;
2174
2175 if (!table->table_ops->entries_dump)
2176 return -EINVAL;
2177
2178 return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2179 0, table);
2180 }
2181
2182 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2183 const struct devlink_dpipe_header *header)
2184 {
2185 struct devlink_dpipe_field *field;
2186 struct nlattr *field_attr;
2187 int i;
2188
2189 for (i = 0; i < header->fields_count; i++) {
2190 field = &header->fields[i];
2191 field_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_FIELD);
2192 if (!field_attr)
2193 return -EMSGSIZE;
2194 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2195 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2196 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2197 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2198 goto nla_put_failure;
2199 nla_nest_end(skb, field_attr);
2200 }
2201 return 0;
2202
2203 nla_put_failure:
2204 nla_nest_cancel(skb, field_attr);
2205 return -EMSGSIZE;
2206 }
2207
2208 static int devlink_dpipe_header_put(struct sk_buff *skb,
2209 struct devlink_dpipe_header *header)
2210 {
2211 struct nlattr *fields_attr, *header_attr;
2212 int err;
2213
2214 header_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER);
2215 if (!header_attr)
2216 return -EMSGSIZE;
2217
2218 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2219 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2220 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2221 goto nla_put_failure;
2222
2223 fields_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2224 if (!fields_attr)
2225 goto nla_put_failure;
2226
2227 err = devlink_dpipe_fields_put(skb, header);
2228 if (err) {
2229 nla_nest_cancel(skb, fields_attr);
2230 goto nla_put_failure;
2231 }
2232 nla_nest_end(skb, fields_attr);
2233 nla_nest_end(skb, header_attr);
2234 return 0;
2235
2236 nla_put_failure:
2237 err = -EMSGSIZE;
2238 nla_nest_cancel(skb, header_attr);
2239 return err;
2240 }
2241
2242 static int devlink_dpipe_headers_fill(struct genl_info *info,
2243 enum devlink_command cmd, int flags,
2244 struct devlink_dpipe_headers *
2245 dpipe_headers)
2246 {
2247 struct devlink *devlink = info->user_ptr[0];
2248 struct nlattr *headers_attr;
2249 struct sk_buff *skb = NULL;
2250 struct nlmsghdr *nlh;
2251 void *hdr;
2252 int i, j;
2253 int err;
2254
2255 i = 0;
2256 start_again:
2257 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2258 if (err)
2259 return err;
2260
2261 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2262 &devlink_nl_family, NLM_F_MULTI, cmd);
2263 if (!hdr) {
2264 nlmsg_free(skb);
2265 return -EMSGSIZE;
2266 }
2267
2268 if (devlink_nl_put_handle(skb, devlink))
2269 goto nla_put_failure;
2270 headers_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2271 if (!headers_attr)
2272 goto nla_put_failure;
2273
2274 j = 0;
2275 for (; i < dpipe_headers->headers_count; i++) {
2276 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2277 if (err) {
2278 if (!j)
2279 goto err_table_put;
2280 break;
2281 }
2282 j++;
2283 }
2284 nla_nest_end(skb, headers_attr);
2285 genlmsg_end(skb, hdr);
2286 if (i != dpipe_headers->headers_count)
2287 goto start_again;
2288
2289 send_done:
2290 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2291 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2292 if (!nlh) {
2293 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2294 if (err)
2295 return err;
2296 goto send_done;
2297 }
2298 return genlmsg_reply(skb, info);
2299
2300 nla_put_failure:
2301 err = -EMSGSIZE;
2302 err_table_put:
2303 nlmsg_free(skb);
2304 return err;
2305 }
2306
2307 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2308 struct genl_info *info)
2309 {
2310 struct devlink *devlink = info->user_ptr[0];
2311
2312 if (!devlink->dpipe_headers)
2313 return -EOPNOTSUPP;
2314 return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2315 0, devlink->dpipe_headers);
2316 }
2317
2318 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2319 const char *table_name,
2320 bool enable)
2321 {
2322 struct devlink_dpipe_table *table;
2323
2324 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2325 table_name);
2326 if (!table)
2327 return -EINVAL;
2328
2329 if (table->counter_control_extern)
2330 return -EOPNOTSUPP;
2331
2332 if (!(table->counters_enabled ^ enable))
2333 return 0;
2334
2335 table->counters_enabled = enable;
2336 if (table->table_ops->counters_set_update)
2337 table->table_ops->counters_set_update(table->priv, enable);
2338 return 0;
2339 }
2340
2341 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2342 struct genl_info *info)
2343 {
2344 struct devlink *devlink = info->user_ptr[0];
2345 const char *table_name;
2346 bool counters_enable;
2347
2348 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2349 !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2350 return -EINVAL;
2351
2352 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2353 counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2354
2355 return devlink_dpipe_table_counters_set(devlink, table_name,
2356 counters_enable);
2357 }
2358
2359 static struct devlink_resource *
2360 devlink_resource_find(struct devlink *devlink,
2361 struct devlink_resource *resource, u64 resource_id)
2362 {
2363 struct list_head *resource_list;
2364
2365 if (resource)
2366 resource_list = &resource->resource_list;
2367 else
2368 resource_list = &devlink->resource_list;
2369
2370 list_for_each_entry(resource, resource_list, list) {
2371 struct devlink_resource *child_resource;
2372
2373 if (resource->id == resource_id)
2374 return resource;
2375
2376 child_resource = devlink_resource_find(devlink, resource,
2377 resource_id);
2378 if (child_resource)
2379 return child_resource;
2380 }
2381 return NULL;
2382 }
2383
2384 static void
2385 devlink_resource_validate_children(struct devlink_resource *resource)
2386 {
2387 struct devlink_resource *child_resource;
2388 bool size_valid = true;
2389 u64 parts_size = 0;
2390
2391 if (list_empty(&resource->resource_list))
2392 goto out;
2393
2394 list_for_each_entry(child_resource, &resource->resource_list, list)
2395 parts_size += child_resource->size_new;
2396
2397 if (parts_size > resource->size_new)
2398 size_valid = false;
2399 out:
2400 resource->size_valid = size_valid;
2401 }
2402
2403 static int
2404 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2405 struct netlink_ext_ack *extack)
2406 {
2407 u64 reminder;
2408 int err = 0;
2409
2410 if (size > resource->size_params.size_max) {
2411 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2412 err = -EINVAL;
2413 }
2414
2415 if (size < resource->size_params.size_min) {
2416 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2417 err = -EINVAL;
2418 }
2419
2420 div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2421 if (reminder) {
2422 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2423 err = -EINVAL;
2424 }
2425
2426 return err;
2427 }
2428
2429 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2430 struct genl_info *info)
2431 {
2432 struct devlink *devlink = info->user_ptr[0];
2433 struct devlink_resource *resource;
2434 u64 resource_id;
2435 u64 size;
2436 int err;
2437
2438 if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2439 !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2440 return -EINVAL;
2441 resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2442
2443 resource = devlink_resource_find(devlink, NULL, resource_id);
2444 if (!resource)
2445 return -EINVAL;
2446
2447 size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2448 err = devlink_resource_validate_size(resource, size, info->extack);
2449 if (err)
2450 return err;
2451
2452 resource->size_new = size;
2453 devlink_resource_validate_children(resource);
2454 if (resource->parent)
2455 devlink_resource_validate_children(resource->parent);
2456 return 0;
2457 }
2458
2459 static int
2460 devlink_resource_size_params_put(struct devlink_resource *resource,
2461 struct sk_buff *skb)
2462 {
2463 struct devlink_resource_size_params *size_params;
2464
2465 size_params = &resource->size_params;
2466 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2467 size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2468 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2469 size_params->size_max, DEVLINK_ATTR_PAD) ||
2470 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2471 size_params->size_min, DEVLINK_ATTR_PAD) ||
2472 nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2473 return -EMSGSIZE;
2474 return 0;
2475 }
2476
2477 static int devlink_resource_occ_put(struct devlink_resource *resource,
2478 struct sk_buff *skb)
2479 {
2480 if (!resource->occ_get)
2481 return 0;
2482 return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2483 resource->occ_get(resource->occ_get_priv),
2484 DEVLINK_ATTR_PAD);
2485 }
2486
2487 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2488 struct devlink_resource *resource)
2489 {
2490 struct devlink_resource *child_resource;
2491 struct nlattr *child_resource_attr;
2492 struct nlattr *resource_attr;
2493
2494 resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE);
2495 if (!resource_attr)
2496 return -EMSGSIZE;
2497
2498 if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2499 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2500 DEVLINK_ATTR_PAD) ||
2501 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2502 DEVLINK_ATTR_PAD))
2503 goto nla_put_failure;
2504 if (resource->size != resource->size_new)
2505 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2506 resource->size_new, DEVLINK_ATTR_PAD);
2507 if (devlink_resource_occ_put(resource, skb))
2508 goto nla_put_failure;
2509 if (devlink_resource_size_params_put(resource, skb))
2510 goto nla_put_failure;
2511 if (list_empty(&resource->resource_list))
2512 goto out;
2513
2514 if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2515 resource->size_valid))
2516 goto nla_put_failure;
2517
2518 child_resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2519 if (!child_resource_attr)
2520 goto nla_put_failure;
2521
2522 list_for_each_entry(child_resource, &resource->resource_list, list) {
2523 if (devlink_resource_put(devlink, skb, child_resource))
2524 goto resource_put_failure;
2525 }
2526
2527 nla_nest_end(skb, child_resource_attr);
2528 out:
2529 nla_nest_end(skb, resource_attr);
2530 return 0;
2531
2532 resource_put_failure:
2533 nla_nest_cancel(skb, child_resource_attr);
2534 nla_put_failure:
2535 nla_nest_cancel(skb, resource_attr);
2536 return -EMSGSIZE;
2537 }
2538
2539 static int devlink_resource_fill(struct genl_info *info,
2540 enum devlink_command cmd, int flags)
2541 {
2542 struct devlink *devlink = info->user_ptr[0];
2543 struct devlink_resource *resource;
2544 struct nlattr *resources_attr;
2545 struct sk_buff *skb = NULL;
2546 struct nlmsghdr *nlh;
2547 bool incomplete;
2548 void *hdr;
2549 int i;
2550 int err;
2551
2552 resource = list_first_entry(&devlink->resource_list,
2553 struct devlink_resource, list);
2554 start_again:
2555 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2556 if (err)
2557 return err;
2558
2559 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2560 &devlink_nl_family, NLM_F_MULTI, cmd);
2561 if (!hdr) {
2562 nlmsg_free(skb);
2563 return -EMSGSIZE;
2564 }
2565
2566 if (devlink_nl_put_handle(skb, devlink))
2567 goto nla_put_failure;
2568
2569 resources_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2570 if (!resources_attr)
2571 goto nla_put_failure;
2572
2573 incomplete = false;
2574 i = 0;
2575 list_for_each_entry_from(resource, &devlink->resource_list, list) {
2576 err = devlink_resource_put(devlink, skb, resource);
2577 if (err) {
2578 if (!i)
2579 goto err_resource_put;
2580 incomplete = true;
2581 break;
2582 }
2583 i++;
2584 }
2585 nla_nest_end(skb, resources_attr);
2586 genlmsg_end(skb, hdr);
2587 if (incomplete)
2588 goto start_again;
2589 send_done:
2590 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2591 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2592 if (!nlh) {
2593 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2594 if (err)
2595 goto err_skb_send_alloc;
2596 goto send_done;
2597 }
2598 return genlmsg_reply(skb, info);
2599
2600 nla_put_failure:
2601 err = -EMSGSIZE;
2602 err_resource_put:
2603 err_skb_send_alloc:
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 const struct devlink_param devlink_param_generic[] = {
2659 {
2660 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2661 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2662 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2663 },
2664 {
2665 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2666 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2667 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2668 },
2669 {
2670 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2671 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2672 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2673 },
2674 {
2675 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2676 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2677 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2678 },
2679 };
2680
2681 static int devlink_param_generic_verify(const struct devlink_param *param)
2682 {
2683 /* verify it match generic parameter by id and name */
2684 if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
2685 return -EINVAL;
2686 if (strcmp(param->name, devlink_param_generic[param->id].name))
2687 return -ENOENT;
2688
2689 WARN_ON(param->type != devlink_param_generic[param->id].type);
2690
2691 return 0;
2692 }
2693
2694 static int devlink_param_driver_verify(const struct devlink_param *param)
2695 {
2696 int i;
2697
2698 if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
2699 return -EINVAL;
2700 /* verify no such name in generic params */
2701 for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
2702 if (!strcmp(param->name, devlink_param_generic[i].name))
2703 return -EEXIST;
2704
2705 return 0;
2706 }
2707
2708 static struct devlink_param_item *
2709 devlink_param_find_by_name(struct list_head *param_list,
2710 const char *param_name)
2711 {
2712 struct devlink_param_item *param_item;
2713
2714 list_for_each_entry(param_item, param_list, list)
2715 if (!strcmp(param_item->param->name, param_name))
2716 return param_item;
2717 return NULL;
2718 }
2719
2720 static struct devlink_param_item *
2721 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
2722 {
2723 struct devlink_param_item *param_item;
2724
2725 list_for_each_entry(param_item, param_list, list)
2726 if (param_item->param->id == param_id)
2727 return param_item;
2728 return NULL;
2729 }
2730
2731 static bool
2732 devlink_param_cmode_is_supported(const struct devlink_param *param,
2733 enum devlink_param_cmode cmode)
2734 {
2735 return test_bit(cmode, &param->supported_cmodes);
2736 }
2737
2738 static int devlink_param_get(struct devlink *devlink,
2739 const struct devlink_param *param,
2740 struct devlink_param_gset_ctx *ctx)
2741 {
2742 if (!param->get)
2743 return -EOPNOTSUPP;
2744 return param->get(devlink, param->id, ctx);
2745 }
2746
2747 static int devlink_param_set(struct devlink *devlink,
2748 const struct devlink_param *param,
2749 struct devlink_param_gset_ctx *ctx)
2750 {
2751 if (!param->set)
2752 return -EOPNOTSUPP;
2753 return param->set(devlink, param->id, ctx);
2754 }
2755
2756 static int
2757 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
2758 {
2759 switch (param_type) {
2760 case DEVLINK_PARAM_TYPE_U8:
2761 return NLA_U8;
2762 case DEVLINK_PARAM_TYPE_U16:
2763 return NLA_U16;
2764 case DEVLINK_PARAM_TYPE_U32:
2765 return NLA_U32;
2766 case DEVLINK_PARAM_TYPE_STRING:
2767 return NLA_STRING;
2768 case DEVLINK_PARAM_TYPE_BOOL:
2769 return NLA_FLAG;
2770 default:
2771 return -EINVAL;
2772 }
2773 }
2774
2775 static int
2776 devlink_nl_param_value_fill_one(struct sk_buff *msg,
2777 enum devlink_param_type type,
2778 enum devlink_param_cmode cmode,
2779 union devlink_param_value val)
2780 {
2781 struct nlattr *param_value_attr;
2782
2783 param_value_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUE);
2784 if (!param_value_attr)
2785 goto nla_put_failure;
2786
2787 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
2788 goto value_nest_cancel;
2789
2790 switch (type) {
2791 case DEVLINK_PARAM_TYPE_U8:
2792 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
2793 goto value_nest_cancel;
2794 break;
2795 case DEVLINK_PARAM_TYPE_U16:
2796 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
2797 goto value_nest_cancel;
2798 break;
2799 case DEVLINK_PARAM_TYPE_U32:
2800 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
2801 goto value_nest_cancel;
2802 break;
2803 case DEVLINK_PARAM_TYPE_STRING:
2804 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
2805 val.vstr))
2806 goto value_nest_cancel;
2807 break;
2808 case DEVLINK_PARAM_TYPE_BOOL:
2809 if (val.vbool &&
2810 nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
2811 goto value_nest_cancel;
2812 break;
2813 }
2814
2815 nla_nest_end(msg, param_value_attr);
2816 return 0;
2817
2818 value_nest_cancel:
2819 nla_nest_cancel(msg, param_value_attr);
2820 nla_put_failure:
2821 return -EMSGSIZE;
2822 }
2823
2824 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
2825 struct devlink_param_item *param_item,
2826 enum devlink_command cmd,
2827 u32 portid, u32 seq, int flags)
2828 {
2829 union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
2830 const struct devlink_param *param = param_item->param;
2831 struct devlink_param_gset_ctx ctx;
2832 struct nlattr *param_values_list;
2833 struct nlattr *param_attr;
2834 int nla_type;
2835 void *hdr;
2836 int err;
2837 int i;
2838
2839 /* Get value from driver part to driverinit configuration mode */
2840 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2841 if (!devlink_param_cmode_is_supported(param, i))
2842 continue;
2843 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
2844 if (!param_item->driverinit_value_valid)
2845 return -EOPNOTSUPP;
2846 param_value[i] = param_item->driverinit_value;
2847 } else {
2848 ctx.cmode = i;
2849 err = devlink_param_get(devlink, param, &ctx);
2850 if (err)
2851 return err;
2852 param_value[i] = ctx.val;
2853 }
2854 }
2855
2856 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
2857 if (!hdr)
2858 return -EMSGSIZE;
2859
2860 if (devlink_nl_put_handle(msg, devlink))
2861 goto genlmsg_cancel;
2862 param_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM);
2863 if (!param_attr)
2864 goto genlmsg_cancel;
2865 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
2866 goto param_nest_cancel;
2867 if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
2868 goto param_nest_cancel;
2869
2870 nla_type = devlink_param_type_to_nla_type(param->type);
2871 if (nla_type < 0)
2872 goto param_nest_cancel;
2873 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
2874 goto param_nest_cancel;
2875
2876 param_values_list = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUES_LIST);
2877 if (!param_values_list)
2878 goto param_nest_cancel;
2879
2880 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2881 if (!devlink_param_cmode_is_supported(param, i))
2882 continue;
2883 err = devlink_nl_param_value_fill_one(msg, param->type,
2884 i, param_value[i]);
2885 if (err)
2886 goto values_list_nest_cancel;
2887 }
2888
2889 nla_nest_end(msg, param_values_list);
2890 nla_nest_end(msg, param_attr);
2891 genlmsg_end(msg, hdr);
2892 return 0;
2893
2894 values_list_nest_cancel:
2895 nla_nest_end(msg, param_values_list);
2896 param_nest_cancel:
2897 nla_nest_cancel(msg, param_attr);
2898 genlmsg_cancel:
2899 genlmsg_cancel(msg, hdr);
2900 return -EMSGSIZE;
2901 }
2902
2903 static void devlink_param_notify(struct devlink *devlink,
2904 struct devlink_param_item *param_item,
2905 enum devlink_command cmd)
2906 {
2907 struct sk_buff *msg;
2908 int err;
2909
2910 WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL);
2911
2912 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2913 if (!msg)
2914 return;
2915 err = devlink_nl_param_fill(msg, devlink, param_item, cmd, 0, 0, 0);
2916 if (err) {
2917 nlmsg_free(msg);
2918 return;
2919 }
2920
2921 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2922 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2923 }
2924
2925 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
2926 struct netlink_callback *cb)
2927 {
2928 struct devlink_param_item *param_item;
2929 struct devlink *devlink;
2930 int start = cb->args[0];
2931 int idx = 0;
2932 int err;
2933
2934 mutex_lock(&devlink_mutex);
2935 list_for_each_entry(devlink, &devlink_list, list) {
2936 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
2937 continue;
2938 mutex_lock(&devlink->lock);
2939 list_for_each_entry(param_item, &devlink->param_list, list) {
2940 if (idx < start) {
2941 idx++;
2942 continue;
2943 }
2944 err = devlink_nl_param_fill(msg, devlink, param_item,
2945 DEVLINK_CMD_PARAM_GET,
2946 NETLINK_CB(cb->skb).portid,
2947 cb->nlh->nlmsg_seq,
2948 NLM_F_MULTI);
2949 if (err) {
2950 mutex_unlock(&devlink->lock);
2951 goto out;
2952 }
2953 idx++;
2954 }
2955 mutex_unlock(&devlink->lock);
2956 }
2957 out:
2958 mutex_unlock(&devlink_mutex);
2959
2960 cb->args[0] = idx;
2961 return msg->len;
2962 }
2963
2964 static int
2965 devlink_param_type_get_from_info(struct genl_info *info,
2966 enum devlink_param_type *param_type)
2967 {
2968 if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
2969 return -EINVAL;
2970
2971 switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
2972 case NLA_U8:
2973 *param_type = DEVLINK_PARAM_TYPE_U8;
2974 break;
2975 case NLA_U16:
2976 *param_type = DEVLINK_PARAM_TYPE_U16;
2977 break;
2978 case NLA_U32:
2979 *param_type = DEVLINK_PARAM_TYPE_U32;
2980 break;
2981 case NLA_STRING:
2982 *param_type = DEVLINK_PARAM_TYPE_STRING;
2983 break;
2984 case NLA_FLAG:
2985 *param_type = DEVLINK_PARAM_TYPE_BOOL;
2986 break;
2987 default:
2988 return -EINVAL;
2989 }
2990
2991 return 0;
2992 }
2993
2994 static int
2995 devlink_param_value_get_from_info(const struct devlink_param *param,
2996 struct genl_info *info,
2997 union devlink_param_value *value)
2998 {
2999 if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3000 !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3001 return -EINVAL;
3002
3003 switch (param->type) {
3004 case DEVLINK_PARAM_TYPE_U8:
3005 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3006 break;
3007 case DEVLINK_PARAM_TYPE_U16:
3008 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3009 break;
3010 case DEVLINK_PARAM_TYPE_U32:
3011 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3012 break;
3013 case DEVLINK_PARAM_TYPE_STRING:
3014 if (nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) >
3015 DEVLINK_PARAM_MAX_STRING_VALUE)
3016 return -EINVAL;
3017 value->vstr = nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3018 break;
3019 case DEVLINK_PARAM_TYPE_BOOL:
3020 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3021 true : false;
3022 break;
3023 }
3024 return 0;
3025 }
3026
3027 static struct devlink_param_item *
3028 devlink_param_get_from_info(struct devlink *devlink,
3029 struct genl_info *info)
3030 {
3031 char *param_name;
3032
3033 if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3034 return NULL;
3035
3036 param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3037 return devlink_param_find_by_name(&devlink->param_list, param_name);
3038 }
3039
3040 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3041 struct genl_info *info)
3042 {
3043 struct devlink *devlink = info->user_ptr[0];
3044 struct devlink_param_item *param_item;
3045 struct sk_buff *msg;
3046 int err;
3047
3048 param_item = devlink_param_get_from_info(devlink, info);
3049 if (!param_item)
3050 return -EINVAL;
3051
3052 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3053 if (!msg)
3054 return -ENOMEM;
3055
3056 err = devlink_nl_param_fill(msg, devlink, param_item,
3057 DEVLINK_CMD_PARAM_GET,
3058 info->snd_portid, info->snd_seq, 0);
3059 if (err) {
3060 nlmsg_free(msg);
3061 return err;
3062 }
3063
3064 return genlmsg_reply(msg, info);
3065 }
3066
3067 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3068 struct genl_info *info)
3069 {
3070 struct devlink *devlink = info->user_ptr[0];
3071 enum devlink_param_type param_type;
3072 struct devlink_param_gset_ctx ctx;
3073 enum devlink_param_cmode cmode;
3074 struct devlink_param_item *param_item;
3075 const struct devlink_param *param;
3076 union devlink_param_value value;
3077 int err = 0;
3078
3079 param_item = devlink_param_get_from_info(devlink, info);
3080 if (!param_item)
3081 return -EINVAL;
3082 param = param_item->param;
3083 err = devlink_param_type_get_from_info(info, &param_type);
3084 if (err)
3085 return err;
3086 if (param_type != param->type)
3087 return -EINVAL;
3088 err = devlink_param_value_get_from_info(param, info, &value);
3089 if (err)
3090 return err;
3091 if (param->validate) {
3092 err = param->validate(devlink, param->id, value, info->extack);
3093 if (err)
3094 return err;
3095 }
3096
3097 if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3098 return -EINVAL;
3099 cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3100 if (!devlink_param_cmode_is_supported(param, cmode))
3101 return -EOPNOTSUPP;
3102
3103 if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3104 param_item->driverinit_value = value;
3105 param_item->driverinit_value_valid = true;
3106 } else {
3107 if (!param->set)
3108 return -EOPNOTSUPP;
3109 ctx.val = value;
3110 ctx.cmode = cmode;
3111 err = devlink_param_set(devlink, param, &ctx);
3112 if (err)
3113 return err;
3114 }
3115
3116 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
3117 return 0;
3118 }
3119
3120 static int devlink_param_register_one(struct devlink *devlink,
3121 const struct devlink_param *param)
3122 {
3123 struct devlink_param_item *param_item;
3124
3125 if (devlink_param_find_by_name(&devlink->param_list,
3126 param->name))
3127 return -EEXIST;
3128
3129 if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3130 WARN_ON(param->get || param->set);
3131 else
3132 WARN_ON(!param->get || !param->set);
3133
3134 param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3135 if (!param_item)
3136 return -ENOMEM;
3137 param_item->param = param;
3138
3139 list_add_tail(&param_item->list, &devlink->param_list);
3140 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
3141 return 0;
3142 }
3143
3144 static void devlink_param_unregister_one(struct devlink *devlink,
3145 const struct devlink_param *param)
3146 {
3147 struct devlink_param_item *param_item;
3148
3149 param_item = devlink_param_find_by_name(&devlink->param_list,
3150 param->name);
3151 WARN_ON(!param_item);
3152 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_DEL);
3153 list_del(&param_item->list);
3154 kfree(param_item);
3155 }
3156
3157 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3158 struct devlink *devlink,
3159 struct devlink_snapshot *snapshot)
3160 {
3161 struct nlattr *snap_attr;
3162 int err;
3163
3164 snap_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3165 if (!snap_attr)
3166 return -EINVAL;
3167
3168 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3169 if (err)
3170 goto nla_put_failure;
3171
3172 nla_nest_end(msg, snap_attr);
3173 return 0;
3174
3175 nla_put_failure:
3176 nla_nest_cancel(msg, snap_attr);
3177 return err;
3178 }
3179
3180 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3181 struct devlink *devlink,
3182 struct devlink_region *region)
3183 {
3184 struct devlink_snapshot *snapshot;
3185 struct nlattr *snapshots_attr;
3186 int err;
3187
3188 snapshots_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOTS);
3189 if (!snapshots_attr)
3190 return -EINVAL;
3191
3192 list_for_each_entry(snapshot, &region->snapshot_list, list) {
3193 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3194 if (err)
3195 goto nla_put_failure;
3196 }
3197
3198 nla_nest_end(msg, snapshots_attr);
3199 return 0;
3200
3201 nla_put_failure:
3202 nla_nest_cancel(msg, snapshots_attr);
3203 return err;
3204 }
3205
3206 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3207 enum devlink_command cmd, u32 portid,
3208 u32 seq, int flags,
3209 struct devlink_region *region)
3210 {
3211 void *hdr;
3212 int err;
3213
3214 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3215 if (!hdr)
3216 return -EMSGSIZE;
3217
3218 err = devlink_nl_put_handle(msg, devlink);
3219 if (err)
3220 goto nla_put_failure;
3221
3222 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3223 if (err)
3224 goto nla_put_failure;
3225
3226 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3227 region->size,
3228 DEVLINK_ATTR_PAD);
3229 if (err)
3230 goto nla_put_failure;
3231
3232 err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3233 if (err)
3234 goto nla_put_failure;
3235
3236 genlmsg_end(msg, hdr);
3237 return 0;
3238
3239 nla_put_failure:
3240 genlmsg_cancel(msg, hdr);
3241 return err;
3242 }
3243
3244 static void devlink_nl_region_notify(struct devlink_region *region,
3245 struct devlink_snapshot *snapshot,
3246 enum devlink_command cmd)
3247 {
3248 struct devlink *devlink = region->devlink;
3249 struct sk_buff *msg;
3250 void *hdr;
3251 int err;
3252
3253 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3254
3255 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3256 if (!msg)
3257 return;
3258
3259 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3260 if (!hdr)
3261 goto out_free_msg;
3262
3263 err = devlink_nl_put_handle(msg, devlink);
3264 if (err)
3265 goto out_cancel_msg;
3266
3267 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3268 region->name);
3269 if (err)
3270 goto out_cancel_msg;
3271
3272 if (snapshot) {
3273 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3274 snapshot->id);
3275 if (err)
3276 goto out_cancel_msg;
3277 } else {
3278 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3279 region->size, DEVLINK_ATTR_PAD);
3280 if (err)
3281 goto out_cancel_msg;
3282 }
3283 genlmsg_end(msg, hdr);
3284
3285 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3286 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3287
3288 return;
3289
3290 out_cancel_msg:
3291 genlmsg_cancel(msg, hdr);
3292 out_free_msg:
3293 nlmsg_free(msg);
3294 }
3295
3296 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3297 struct genl_info *info)
3298 {
3299 struct devlink *devlink = info->user_ptr[0];
3300 struct devlink_region *region;
3301 const char *region_name;
3302 struct sk_buff *msg;
3303 int err;
3304
3305 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3306 return -EINVAL;
3307
3308 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3309 region = devlink_region_get_by_name(devlink, region_name);
3310 if (!region)
3311 return -EINVAL;
3312
3313 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3314 if (!msg)
3315 return -ENOMEM;
3316
3317 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3318 info->snd_portid, info->snd_seq, 0,
3319 region);
3320 if (err) {
3321 nlmsg_free(msg);
3322 return err;
3323 }
3324
3325 return genlmsg_reply(msg, info);
3326 }
3327
3328 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3329 struct netlink_callback *cb)
3330 {
3331 struct devlink_region *region;
3332 struct devlink *devlink;
3333 int start = cb->args[0];
3334 int idx = 0;
3335 int err;
3336
3337 mutex_lock(&devlink_mutex);
3338 list_for_each_entry(devlink, &devlink_list, list) {
3339 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3340 continue;
3341
3342 mutex_lock(&devlink->lock);
3343 list_for_each_entry(region, &devlink->region_list, list) {
3344 if (idx < start) {
3345 idx++;
3346 continue;
3347 }
3348 err = devlink_nl_region_fill(msg, devlink,
3349 DEVLINK_CMD_REGION_GET,
3350 NETLINK_CB(cb->skb).portid,
3351 cb->nlh->nlmsg_seq,
3352 NLM_F_MULTI, region);
3353 if (err) {
3354 mutex_unlock(&devlink->lock);
3355 goto out;
3356 }
3357 idx++;
3358 }
3359 mutex_unlock(&devlink->lock);
3360 }
3361 out:
3362 mutex_unlock(&devlink_mutex);
3363 cb->args[0] = idx;
3364 return msg->len;
3365 }
3366
3367 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3368 struct genl_info *info)
3369 {
3370 struct devlink *devlink = info->user_ptr[0];
3371 struct devlink_snapshot *snapshot;
3372 struct devlink_region *region;
3373 const char *region_name;
3374 u32 snapshot_id;
3375
3376 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3377 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3378 return -EINVAL;
3379
3380 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3381 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3382
3383 region = devlink_region_get_by_name(devlink, region_name);
3384 if (!region)
3385 return -EINVAL;
3386
3387 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3388 if (!snapshot)
3389 return -EINVAL;
3390
3391 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3392 devlink_region_snapshot_del(snapshot);
3393 return 0;
3394 }
3395
3396 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3397 struct devlink *devlink,
3398 u8 *chunk, u32 chunk_size,
3399 u64 addr)
3400 {
3401 struct nlattr *chunk_attr;
3402 int err;
3403
3404 chunk_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_CHUNK);
3405 if (!chunk_attr)
3406 return -EINVAL;
3407
3408 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3409 if (err)
3410 goto nla_put_failure;
3411
3412 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3413 DEVLINK_ATTR_PAD);
3414 if (err)
3415 goto nla_put_failure;
3416
3417 nla_nest_end(msg, chunk_attr);
3418 return 0;
3419
3420 nla_put_failure:
3421 nla_nest_cancel(msg, chunk_attr);
3422 return err;
3423 }
3424
3425 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3426
3427 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3428 struct devlink *devlink,
3429 struct devlink_region *region,
3430 struct nlattr **attrs,
3431 u64 start_offset,
3432 u64 end_offset,
3433 bool dump,
3434 u64 *new_offset)
3435 {
3436 struct devlink_snapshot *snapshot;
3437 u64 curr_offset = start_offset;
3438 u32 snapshot_id;
3439 int err = 0;
3440
3441 *new_offset = start_offset;
3442
3443 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3444 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3445 if (!snapshot)
3446 return -EINVAL;
3447
3448 if (end_offset > snapshot->data_len || dump)
3449 end_offset = snapshot->data_len;
3450
3451 while (curr_offset < end_offset) {
3452 u32 data_size;
3453 u8 *data;
3454
3455 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3456 data_size = end_offset - curr_offset;
3457 else
3458 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3459
3460 data = &snapshot->data[curr_offset];
3461 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3462 data, data_size,
3463 curr_offset);
3464 if (err)
3465 break;
3466
3467 curr_offset += data_size;
3468 }
3469 *new_offset = curr_offset;
3470
3471 return err;
3472 }
3473
3474 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3475 struct netlink_callback *cb)
3476 {
3477 u64 ret_offset, start_offset, end_offset = 0;
3478 struct nlattr *attrs[DEVLINK_ATTR_MAX + 1];
3479 const struct genl_ops *ops = cb->data;
3480 struct devlink_region *region;
3481 struct nlattr *chunks_attr;
3482 const char *region_name;
3483 struct devlink *devlink;
3484 bool dump = true;
3485 void *hdr;
3486 int err;
3487
3488 start_offset = *((u64 *)&cb->args[0]);
3489
3490 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + devlink_nl_family.hdrsize,
3491 attrs, DEVLINK_ATTR_MAX, ops->policy, NULL);
3492 if (err)
3493 goto out;
3494
3495 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3496 if (IS_ERR(devlink))
3497 goto out;
3498
3499 mutex_lock(&devlink_mutex);
3500 mutex_lock(&devlink->lock);
3501
3502 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3503 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3504 goto out_unlock;
3505
3506 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3507 region = devlink_region_get_by_name(devlink, region_name);
3508 if (!region)
3509 goto out_unlock;
3510
3511 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3512 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3513 DEVLINK_CMD_REGION_READ);
3514 if (!hdr)
3515 goto out_unlock;
3516
3517 err = devlink_nl_put_handle(skb, devlink);
3518 if (err)
3519 goto nla_put_failure;
3520
3521 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3522 if (err)
3523 goto nla_put_failure;
3524
3525 chunks_attr = nla_nest_start(skb, DEVLINK_ATTR_REGION_CHUNKS);
3526 if (!chunks_attr)
3527 goto nla_put_failure;
3528
3529 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
3530 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
3531 if (!start_offset)
3532 start_offset =
3533 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3534
3535 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3536 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
3537 dump = false;
3538 }
3539
3540 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
3541 region, attrs,
3542 start_offset,
3543 end_offset, dump,
3544 &ret_offset);
3545
3546 if (err && err != -EMSGSIZE)
3547 goto nla_put_failure;
3548
3549 /* Check if there was any progress done to prevent infinite loop */
3550 if (ret_offset == start_offset)
3551 goto nla_put_failure;
3552
3553 *((u64 *)&cb->args[0]) = ret_offset;
3554
3555 nla_nest_end(skb, chunks_attr);
3556 genlmsg_end(skb, hdr);
3557 mutex_unlock(&devlink->lock);
3558 mutex_unlock(&devlink_mutex);
3559
3560 return skb->len;
3561
3562 nla_put_failure:
3563 genlmsg_cancel(skb, hdr);
3564 out_unlock:
3565 mutex_unlock(&devlink->lock);
3566 mutex_unlock(&devlink_mutex);
3567 out:
3568 return 0;
3569 }
3570
3571 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
3572 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
3573 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
3574 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
3575 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
3576 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
3577 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
3578 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
3579 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
3580 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
3581 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
3582 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
3583 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
3584 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
3585 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
3586 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
3587 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
3588 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
3589 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
3590 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
3591 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
3592 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
3593 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
3594 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
3595 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
3596 };
3597
3598 static const struct genl_ops devlink_nl_ops[] = {
3599 {
3600 .cmd = DEVLINK_CMD_GET,
3601 .doit = devlink_nl_cmd_get_doit,
3602 .dumpit = devlink_nl_cmd_get_dumpit,
3603 .policy = devlink_nl_policy,
3604 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3605 /* can be retrieved by unprivileged users */
3606 },
3607 {
3608 .cmd = DEVLINK_CMD_PORT_GET,
3609 .doit = devlink_nl_cmd_port_get_doit,
3610 .dumpit = devlink_nl_cmd_port_get_dumpit,
3611 .policy = devlink_nl_policy,
3612 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
3613 /* can be retrieved by unprivileged users */
3614 },
3615 {
3616 .cmd = DEVLINK_CMD_PORT_SET,
3617 .doit = devlink_nl_cmd_port_set_doit,
3618 .policy = devlink_nl_policy,
3619 .flags = GENL_ADMIN_PERM,
3620 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
3621 },
3622 {
3623 .cmd = DEVLINK_CMD_PORT_SPLIT,
3624 .doit = devlink_nl_cmd_port_split_doit,
3625 .policy = devlink_nl_policy,
3626 .flags = GENL_ADMIN_PERM,
3627 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3628 DEVLINK_NL_FLAG_NO_LOCK,
3629 },
3630 {
3631 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
3632 .doit = devlink_nl_cmd_port_unsplit_doit,
3633 .policy = devlink_nl_policy,
3634 .flags = GENL_ADMIN_PERM,
3635 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3636 DEVLINK_NL_FLAG_NO_LOCK,
3637 },
3638 {
3639 .cmd = DEVLINK_CMD_SB_GET,
3640 .doit = devlink_nl_cmd_sb_get_doit,
3641 .dumpit = devlink_nl_cmd_sb_get_dumpit,
3642 .policy = devlink_nl_policy,
3643 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3644 DEVLINK_NL_FLAG_NEED_SB,
3645 /* can be retrieved by unprivileged users */
3646 },
3647 {
3648 .cmd = DEVLINK_CMD_SB_POOL_GET,
3649 .doit = devlink_nl_cmd_sb_pool_get_doit,
3650 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
3651 .policy = devlink_nl_policy,
3652 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3653 DEVLINK_NL_FLAG_NEED_SB,
3654 /* can be retrieved by unprivileged users */
3655 },
3656 {
3657 .cmd = DEVLINK_CMD_SB_POOL_SET,
3658 .doit = devlink_nl_cmd_sb_pool_set_doit,
3659 .policy = devlink_nl_policy,
3660 .flags = GENL_ADMIN_PERM,
3661 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3662 DEVLINK_NL_FLAG_NEED_SB,
3663 },
3664 {
3665 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
3666 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
3667 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
3668 .policy = devlink_nl_policy,
3669 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3670 DEVLINK_NL_FLAG_NEED_SB,
3671 /* can be retrieved by unprivileged users */
3672 },
3673 {
3674 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
3675 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
3676 .policy = devlink_nl_policy,
3677 .flags = GENL_ADMIN_PERM,
3678 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3679 DEVLINK_NL_FLAG_NEED_SB,
3680 },
3681 {
3682 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
3683 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
3684 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
3685 .policy = devlink_nl_policy,
3686 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3687 DEVLINK_NL_FLAG_NEED_SB,
3688 /* can be retrieved by unprivileged users */
3689 },
3690 {
3691 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
3692 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
3693 .policy = devlink_nl_policy,
3694 .flags = GENL_ADMIN_PERM,
3695 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3696 DEVLINK_NL_FLAG_NEED_SB,
3697 },
3698 {
3699 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
3700 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
3701 .policy = devlink_nl_policy,
3702 .flags = GENL_ADMIN_PERM,
3703 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3704 DEVLINK_NL_FLAG_NEED_SB,
3705 },
3706 {
3707 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
3708 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
3709 .policy = devlink_nl_policy,
3710 .flags = GENL_ADMIN_PERM,
3711 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3712 DEVLINK_NL_FLAG_NEED_SB,
3713 },
3714 {
3715 .cmd = DEVLINK_CMD_ESWITCH_GET,
3716 .doit = devlink_nl_cmd_eswitch_get_doit,
3717 .policy = devlink_nl_policy,
3718 .flags = GENL_ADMIN_PERM,
3719 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3720 },
3721 {
3722 .cmd = DEVLINK_CMD_ESWITCH_SET,
3723 .doit = devlink_nl_cmd_eswitch_set_doit,
3724 .policy = devlink_nl_policy,
3725 .flags = GENL_ADMIN_PERM,
3726 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3727 DEVLINK_NL_FLAG_NO_LOCK,
3728 },
3729 {
3730 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
3731 .doit = devlink_nl_cmd_dpipe_table_get,
3732 .policy = devlink_nl_policy,
3733 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3734 /* can be retrieved by unprivileged users */
3735 },
3736 {
3737 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
3738 .doit = devlink_nl_cmd_dpipe_entries_get,
3739 .policy = devlink_nl_policy,
3740 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3741 /* can be retrieved by unprivileged users */
3742 },
3743 {
3744 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
3745 .doit = devlink_nl_cmd_dpipe_headers_get,
3746 .policy = devlink_nl_policy,
3747 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3748 /* can be retrieved by unprivileged users */
3749 },
3750 {
3751 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
3752 .doit = devlink_nl_cmd_dpipe_table_counters_set,
3753 .policy = devlink_nl_policy,
3754 .flags = GENL_ADMIN_PERM,
3755 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3756 },
3757 {
3758 .cmd = DEVLINK_CMD_RESOURCE_SET,
3759 .doit = devlink_nl_cmd_resource_set,
3760 .policy = devlink_nl_policy,
3761 .flags = GENL_ADMIN_PERM,
3762 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3763 },
3764 {
3765 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
3766 .doit = devlink_nl_cmd_resource_dump,
3767 .policy = devlink_nl_policy,
3768 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3769 /* can be retrieved by unprivileged users */
3770 },
3771 {
3772 .cmd = DEVLINK_CMD_RELOAD,
3773 .doit = devlink_nl_cmd_reload,
3774 .policy = devlink_nl_policy,
3775 .flags = GENL_ADMIN_PERM,
3776 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3777 DEVLINK_NL_FLAG_NO_LOCK,
3778 },
3779 {
3780 .cmd = DEVLINK_CMD_PARAM_GET,
3781 .doit = devlink_nl_cmd_param_get_doit,
3782 .dumpit = devlink_nl_cmd_param_get_dumpit,
3783 .policy = devlink_nl_policy,
3784 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3785 /* can be retrieved by unprivileged users */
3786 },
3787 {
3788 .cmd = DEVLINK_CMD_PARAM_SET,
3789 .doit = devlink_nl_cmd_param_set_doit,
3790 .policy = devlink_nl_policy,
3791 .flags = GENL_ADMIN_PERM,
3792 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3793 },
3794 {
3795 .cmd = DEVLINK_CMD_REGION_GET,
3796 .doit = devlink_nl_cmd_region_get_doit,
3797 .dumpit = devlink_nl_cmd_region_get_dumpit,
3798 .policy = devlink_nl_policy,
3799 .flags = GENL_ADMIN_PERM,
3800 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3801 },
3802 {
3803 .cmd = DEVLINK_CMD_REGION_DEL,
3804 .doit = devlink_nl_cmd_region_del,
3805 .policy = devlink_nl_policy,
3806 .flags = GENL_ADMIN_PERM,
3807 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3808 },
3809 {
3810 .cmd = DEVLINK_CMD_REGION_READ,
3811 .dumpit = devlink_nl_cmd_region_read_dumpit,
3812 .policy = devlink_nl_policy,
3813 .flags = GENL_ADMIN_PERM,
3814 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3815 },
3816 };
3817
3818 static struct genl_family devlink_nl_family __ro_after_init = {
3819 .name = DEVLINK_GENL_NAME,
3820 .version = DEVLINK_GENL_VERSION,
3821 .maxattr = DEVLINK_ATTR_MAX,
3822 .netnsok = true,
3823 .pre_doit = devlink_nl_pre_doit,
3824 .post_doit = devlink_nl_post_doit,
3825 .module = THIS_MODULE,
3826 .ops = devlink_nl_ops,
3827 .n_ops = ARRAY_SIZE(devlink_nl_ops),
3828 .mcgrps = devlink_nl_mcgrps,
3829 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
3830 };
3831
3832 /**
3833 * devlink_alloc - Allocate new devlink instance resources
3834 *
3835 * @ops: ops
3836 * @priv_size: size of user private data
3837 *
3838 * Allocate new devlink instance resources, including devlink index
3839 * and name.
3840 */
3841 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
3842 {
3843 struct devlink *devlink;
3844
3845 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
3846 if (!devlink)
3847 return NULL;
3848 devlink->ops = ops;
3849 devlink_net_set(devlink, &init_net);
3850 INIT_LIST_HEAD(&devlink->port_list);
3851 INIT_LIST_HEAD(&devlink->sb_list);
3852 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
3853 INIT_LIST_HEAD(&devlink->resource_list);
3854 INIT_LIST_HEAD(&devlink->param_list);
3855 INIT_LIST_HEAD(&devlink->region_list);
3856 mutex_init(&devlink->lock);
3857 return devlink;
3858 }
3859 EXPORT_SYMBOL_GPL(devlink_alloc);
3860
3861 /**
3862 * devlink_register - Register devlink instance
3863 *
3864 * @devlink: devlink
3865 */
3866 int devlink_register(struct devlink *devlink, struct device *dev)
3867 {
3868 mutex_lock(&devlink_mutex);
3869 devlink->dev = dev;
3870 list_add_tail(&devlink->list, &devlink_list);
3871 devlink_notify(devlink, DEVLINK_CMD_NEW);
3872 mutex_unlock(&devlink_mutex);
3873 return 0;
3874 }
3875 EXPORT_SYMBOL_GPL(devlink_register);
3876
3877 /**
3878 * devlink_unregister - Unregister devlink instance
3879 *
3880 * @devlink: devlink
3881 */
3882 void devlink_unregister(struct devlink *devlink)
3883 {
3884 mutex_lock(&devlink_mutex);
3885 devlink_notify(devlink, DEVLINK_CMD_DEL);
3886 list_del(&devlink->list);
3887 mutex_unlock(&devlink_mutex);
3888 }
3889 EXPORT_SYMBOL_GPL(devlink_unregister);
3890
3891 /**
3892 * devlink_free - Free devlink instance resources
3893 *
3894 * @devlink: devlink
3895 */
3896 void devlink_free(struct devlink *devlink)
3897 {
3898 kfree(devlink);
3899 }
3900 EXPORT_SYMBOL_GPL(devlink_free);
3901
3902 /**
3903 * devlink_port_register - Register devlink port
3904 *
3905 * @devlink: devlink
3906 * @devlink_port: devlink port
3907 * @port_index
3908 *
3909 * Register devlink port with provided port index. User can use
3910 * any indexing, even hw-related one. devlink_port structure
3911 * is convenient to be embedded inside user driver private structure.
3912 * Note that the caller should take care of zeroing the devlink_port
3913 * structure.
3914 */
3915 int devlink_port_register(struct devlink *devlink,
3916 struct devlink_port *devlink_port,
3917 unsigned int port_index)
3918 {
3919 mutex_lock(&devlink->lock);
3920 if (devlink_port_index_exists(devlink, port_index)) {
3921 mutex_unlock(&devlink->lock);
3922 return -EEXIST;
3923 }
3924 devlink_port->devlink = devlink;
3925 devlink_port->index = port_index;
3926 devlink_port->registered = true;
3927 list_add_tail(&devlink_port->list, &devlink->port_list);
3928 mutex_unlock(&devlink->lock);
3929 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
3930 return 0;
3931 }
3932 EXPORT_SYMBOL_GPL(devlink_port_register);
3933
3934 /**
3935 * devlink_port_unregister - Unregister devlink port
3936 *
3937 * @devlink_port: devlink port
3938 */
3939 void devlink_port_unregister(struct devlink_port *devlink_port)
3940 {
3941 struct devlink *devlink = devlink_port->devlink;
3942
3943 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
3944 mutex_lock(&devlink->lock);
3945 list_del(&devlink_port->list);
3946 mutex_unlock(&devlink->lock);
3947 }
3948 EXPORT_SYMBOL_GPL(devlink_port_unregister);
3949
3950 static void __devlink_port_type_set(struct devlink_port *devlink_port,
3951 enum devlink_port_type type,
3952 void *type_dev)
3953 {
3954 devlink_port->type = type;
3955 devlink_port->type_dev = type_dev;
3956 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
3957 }
3958
3959 /**
3960 * devlink_port_type_eth_set - Set port type to Ethernet
3961 *
3962 * @devlink_port: devlink port
3963 * @netdev: related netdevice
3964 */
3965 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
3966 struct net_device *netdev)
3967 {
3968 return __devlink_port_type_set(devlink_port,
3969 DEVLINK_PORT_TYPE_ETH, netdev);
3970 }
3971 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
3972
3973 /**
3974 * devlink_port_type_ib_set - Set port type to InfiniBand
3975 *
3976 * @devlink_port: devlink port
3977 * @ibdev: related IB device
3978 */
3979 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
3980 struct ib_device *ibdev)
3981 {
3982 return __devlink_port_type_set(devlink_port,
3983 DEVLINK_PORT_TYPE_IB, ibdev);
3984 }
3985 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
3986
3987 /**
3988 * devlink_port_type_clear - Clear port type
3989 *
3990 * @devlink_port: devlink port
3991 */
3992 void devlink_port_type_clear(struct devlink_port *devlink_port)
3993 {
3994 return __devlink_port_type_set(devlink_port,
3995 DEVLINK_PORT_TYPE_NOTSET, NULL);
3996 }
3997 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
3998
3999 /**
4000 * devlink_port_attrs_set - Set port attributes
4001 *
4002 * @devlink_port: devlink port
4003 * @flavour: flavour of the port
4004 * @port_number: number of the port that is facing user, for example
4005 * the front panel port number
4006 * @split: indicates if this is split port
4007 * @split_subport_number: if the port is split, this is the number
4008 * of subport.
4009 */
4010 void devlink_port_attrs_set(struct devlink_port *devlink_port,
4011 enum devlink_port_flavour flavour,
4012 u32 port_number, bool split,
4013 u32 split_subport_number)
4014 {
4015 struct devlink_port_attrs *attrs = &devlink_port->attrs;
4016
4017 attrs->set = true;
4018 attrs->flavour = flavour;
4019 attrs->port_number = port_number;
4020 attrs->split = split;
4021 attrs->split_subport_number = split_subport_number;
4022 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
4023 }
4024 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
4025
4026 int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
4027 char *name, size_t len)
4028 {
4029 struct devlink_port_attrs *attrs = &devlink_port->attrs;
4030 int n = 0;
4031
4032 if (!attrs->set)
4033 return -EOPNOTSUPP;
4034
4035 switch (attrs->flavour) {
4036 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
4037 if (!attrs->split)
4038 n = snprintf(name, len, "p%u", attrs->port_number);
4039 else
4040 n = snprintf(name, len, "p%us%u", attrs->port_number,
4041 attrs->split_subport_number);
4042 break;
4043 case DEVLINK_PORT_FLAVOUR_CPU:
4044 case DEVLINK_PORT_FLAVOUR_DSA:
4045 /* As CPU and DSA ports do not have a netdevice associated
4046 * case should not ever happen.
4047 */
4048 WARN_ON(1);
4049 return -EINVAL;
4050 }
4051
4052 if (n >= len)
4053 return -EINVAL;
4054
4055 return 0;
4056 }
4057 EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
4058
4059 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
4060 u32 size, u16 ingress_pools_count,
4061 u16 egress_pools_count, u16 ingress_tc_count,
4062 u16 egress_tc_count)
4063 {
4064 struct devlink_sb *devlink_sb;
4065 int err = 0;
4066
4067 mutex_lock(&devlink->lock);
4068 if (devlink_sb_index_exists(devlink, sb_index)) {
4069 err = -EEXIST;
4070 goto unlock;
4071 }
4072
4073 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
4074 if (!devlink_sb) {
4075 err = -ENOMEM;
4076 goto unlock;
4077 }
4078 devlink_sb->index = sb_index;
4079 devlink_sb->size = size;
4080 devlink_sb->ingress_pools_count = ingress_pools_count;
4081 devlink_sb->egress_pools_count = egress_pools_count;
4082 devlink_sb->ingress_tc_count = ingress_tc_count;
4083 devlink_sb->egress_tc_count = egress_tc_count;
4084 list_add_tail(&devlink_sb->list, &devlink->sb_list);
4085 unlock:
4086 mutex_unlock(&devlink->lock);
4087 return err;
4088 }
4089 EXPORT_SYMBOL_GPL(devlink_sb_register);
4090
4091 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
4092 {
4093 struct devlink_sb *devlink_sb;
4094
4095 mutex_lock(&devlink->lock);
4096 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
4097 WARN_ON(!devlink_sb);
4098 list_del(&devlink_sb->list);
4099 mutex_unlock(&devlink->lock);
4100 kfree(devlink_sb);
4101 }
4102 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
4103
4104 /**
4105 * devlink_dpipe_headers_register - register dpipe headers
4106 *
4107 * @devlink: devlink
4108 * @dpipe_headers: dpipe header array
4109 *
4110 * Register the headers supported by hardware.
4111 */
4112 int devlink_dpipe_headers_register(struct devlink *devlink,
4113 struct devlink_dpipe_headers *dpipe_headers)
4114 {
4115 mutex_lock(&devlink->lock);
4116 devlink->dpipe_headers = dpipe_headers;
4117 mutex_unlock(&devlink->lock);
4118 return 0;
4119 }
4120 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
4121
4122 /**
4123 * devlink_dpipe_headers_unregister - unregister dpipe headers
4124 *
4125 * @devlink: devlink
4126 *
4127 * Unregister the headers supported by hardware.
4128 */
4129 void devlink_dpipe_headers_unregister(struct devlink *devlink)
4130 {
4131 mutex_lock(&devlink->lock);
4132 devlink->dpipe_headers = NULL;
4133 mutex_unlock(&devlink->lock);
4134 }
4135 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
4136
4137 /**
4138 * devlink_dpipe_table_counter_enabled - check if counter allocation
4139 * required
4140 * @devlink: devlink
4141 * @table_name: tables name
4142 *
4143 * Used by driver to check if counter allocation is required.
4144 * After counter allocation is turned on the table entries
4145 * are updated to include counter statistics.
4146 *
4147 * After that point on the driver must respect the counter
4148 * state so that each entry added to the table is added
4149 * with a counter.
4150 */
4151 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
4152 const char *table_name)
4153 {
4154 struct devlink_dpipe_table *table;
4155 bool enabled;
4156
4157 rcu_read_lock();
4158 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4159 table_name);
4160 enabled = false;
4161 if (table)
4162 enabled = table->counters_enabled;
4163 rcu_read_unlock();
4164 return enabled;
4165 }
4166 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
4167
4168 /**
4169 * devlink_dpipe_table_register - register dpipe table
4170 *
4171 * @devlink: devlink
4172 * @table_name: table name
4173 * @table_ops: table ops
4174 * @priv: priv
4175 * @counter_control_extern: external control for counters
4176 */
4177 int devlink_dpipe_table_register(struct devlink *devlink,
4178 const char *table_name,
4179 struct devlink_dpipe_table_ops *table_ops,
4180 void *priv, bool counter_control_extern)
4181 {
4182 struct devlink_dpipe_table *table;
4183
4184 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
4185 return -EEXIST;
4186
4187 if (WARN_ON(!table_ops->size_get))
4188 return -EINVAL;
4189
4190 table = kzalloc(sizeof(*table), GFP_KERNEL);
4191 if (!table)
4192 return -ENOMEM;
4193
4194 table->name = table_name;
4195 table->table_ops = table_ops;
4196 table->priv = priv;
4197 table->counter_control_extern = counter_control_extern;
4198
4199 mutex_lock(&devlink->lock);
4200 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
4201 mutex_unlock(&devlink->lock);
4202 return 0;
4203 }
4204 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
4205
4206 /**
4207 * devlink_dpipe_table_unregister - unregister dpipe table
4208 *
4209 * @devlink: devlink
4210 * @table_name: table name
4211 */
4212 void devlink_dpipe_table_unregister(struct devlink *devlink,
4213 const char *table_name)
4214 {
4215 struct devlink_dpipe_table *table;
4216
4217 mutex_lock(&devlink->lock);
4218 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4219 table_name);
4220 if (!table)
4221 goto unlock;
4222 list_del_rcu(&table->list);
4223 mutex_unlock(&devlink->lock);
4224 kfree_rcu(table, rcu);
4225 return;
4226 unlock:
4227 mutex_unlock(&devlink->lock);
4228 }
4229 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
4230
4231 /**
4232 * devlink_resource_register - devlink resource register
4233 *
4234 * @devlink: devlink
4235 * @resource_name: resource's name
4236 * @top_hierarchy: top hierarchy
4237 * @reload_required: reload is required for new configuration to
4238 * apply
4239 * @resource_size: resource's size
4240 * @resource_id: resource's id
4241 * @parent_reosurce_id: resource's parent id
4242 * @size params: size parameters
4243 */
4244 int devlink_resource_register(struct devlink *devlink,
4245 const char *resource_name,
4246 u64 resource_size,
4247 u64 resource_id,
4248 u64 parent_resource_id,
4249 const struct devlink_resource_size_params *size_params)
4250 {
4251 struct devlink_resource *resource;
4252 struct list_head *resource_list;
4253 bool top_hierarchy;
4254 int err = 0;
4255
4256 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
4257
4258 mutex_lock(&devlink->lock);
4259 resource = devlink_resource_find(devlink, NULL, resource_id);
4260 if (resource) {
4261 err = -EINVAL;
4262 goto out;
4263 }
4264
4265 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
4266 if (!resource) {
4267 err = -ENOMEM;
4268 goto out;
4269 }
4270
4271 if (top_hierarchy) {
4272 resource_list = &devlink->resource_list;
4273 } else {
4274 struct devlink_resource *parent_resource;
4275
4276 parent_resource = devlink_resource_find(devlink, NULL,
4277 parent_resource_id);
4278 if (parent_resource) {
4279 resource_list = &parent_resource->resource_list;
4280 resource->parent = parent_resource;
4281 } else {
4282 kfree(resource);
4283 err = -EINVAL;
4284 goto out;
4285 }
4286 }
4287
4288 resource->name = resource_name;
4289 resource->size = resource_size;
4290 resource->size_new = resource_size;
4291 resource->id = resource_id;
4292 resource->size_valid = true;
4293 memcpy(&resource->size_params, size_params,
4294 sizeof(resource->size_params));
4295 INIT_LIST_HEAD(&resource->resource_list);
4296 list_add_tail(&resource->list, resource_list);
4297 out:
4298 mutex_unlock(&devlink->lock);
4299 return err;
4300 }
4301 EXPORT_SYMBOL_GPL(devlink_resource_register);
4302
4303 /**
4304 * devlink_resources_unregister - free all resources
4305 *
4306 * @devlink: devlink
4307 * @resource: resource
4308 */
4309 void devlink_resources_unregister(struct devlink *devlink,
4310 struct devlink_resource *resource)
4311 {
4312 struct devlink_resource *tmp, *child_resource;
4313 struct list_head *resource_list;
4314
4315 if (resource)
4316 resource_list = &resource->resource_list;
4317 else
4318 resource_list = &devlink->resource_list;
4319
4320 if (!resource)
4321 mutex_lock(&devlink->lock);
4322
4323 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
4324 devlink_resources_unregister(devlink, child_resource);
4325 list_del(&child_resource->list);
4326 kfree(child_resource);
4327 }
4328
4329 if (!resource)
4330 mutex_unlock(&devlink->lock);
4331 }
4332 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
4333
4334 /**
4335 * devlink_resource_size_get - get and update size
4336 *
4337 * @devlink: devlink
4338 * @resource_id: the requested resource id
4339 * @p_resource_size: ptr to update
4340 */
4341 int devlink_resource_size_get(struct devlink *devlink,
4342 u64 resource_id,
4343 u64 *p_resource_size)
4344 {
4345 struct devlink_resource *resource;
4346 int err = 0;
4347
4348 mutex_lock(&devlink->lock);
4349 resource = devlink_resource_find(devlink, NULL, resource_id);
4350 if (!resource) {
4351 err = -EINVAL;
4352 goto out;
4353 }
4354 *p_resource_size = resource->size_new;
4355 resource->size = resource->size_new;
4356 out:
4357 mutex_unlock(&devlink->lock);
4358 return err;
4359 }
4360 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
4361
4362 /**
4363 * devlink_dpipe_table_resource_set - set the resource id
4364 *
4365 * @devlink: devlink
4366 * @table_name: table name
4367 * @resource_id: resource id
4368 * @resource_units: number of resource's units consumed per table's entry
4369 */
4370 int devlink_dpipe_table_resource_set(struct devlink *devlink,
4371 const char *table_name, u64 resource_id,
4372 u64 resource_units)
4373 {
4374 struct devlink_dpipe_table *table;
4375 int err = 0;
4376
4377 mutex_lock(&devlink->lock);
4378 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4379 table_name);
4380 if (!table) {
4381 err = -EINVAL;
4382 goto out;
4383 }
4384 table->resource_id = resource_id;
4385 table->resource_units = resource_units;
4386 table->resource_valid = true;
4387 out:
4388 mutex_unlock(&devlink->lock);
4389 return err;
4390 }
4391 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
4392
4393 /**
4394 * devlink_resource_occ_get_register - register occupancy getter
4395 *
4396 * @devlink: devlink
4397 * @resource_id: resource id
4398 * @occ_get: occupancy getter callback
4399 * @occ_get_priv: occupancy getter callback priv
4400 */
4401 void devlink_resource_occ_get_register(struct devlink *devlink,
4402 u64 resource_id,
4403 devlink_resource_occ_get_t *occ_get,
4404 void *occ_get_priv)
4405 {
4406 struct devlink_resource *resource;
4407
4408 mutex_lock(&devlink->lock);
4409 resource = devlink_resource_find(devlink, NULL, resource_id);
4410 if (WARN_ON(!resource))
4411 goto out;
4412 WARN_ON(resource->occ_get);
4413
4414 resource->occ_get = occ_get;
4415 resource->occ_get_priv = occ_get_priv;
4416 out:
4417 mutex_unlock(&devlink->lock);
4418 }
4419 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
4420
4421 /**
4422 * devlink_resource_occ_get_unregister - unregister occupancy getter
4423 *
4424 * @devlink: devlink
4425 * @resource_id: resource id
4426 */
4427 void devlink_resource_occ_get_unregister(struct devlink *devlink,
4428 u64 resource_id)
4429 {
4430 struct devlink_resource *resource;
4431
4432 mutex_lock(&devlink->lock);
4433 resource = devlink_resource_find(devlink, NULL, resource_id);
4434 if (WARN_ON(!resource))
4435 goto out;
4436 WARN_ON(!resource->occ_get);
4437
4438 resource->occ_get = NULL;
4439 resource->occ_get_priv = NULL;
4440 out:
4441 mutex_unlock(&devlink->lock);
4442 }
4443 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
4444
4445 /**
4446 * devlink_params_register - register configuration parameters
4447 *
4448 * @devlink: devlink
4449 * @params: configuration parameters array
4450 * @params_count: number of parameters provided
4451 *
4452 * Register the configuration parameters supported by the driver.
4453 */
4454 int devlink_params_register(struct devlink *devlink,
4455 const struct devlink_param *params,
4456 size_t params_count)
4457 {
4458 const struct devlink_param *param = params;
4459 int i;
4460 int err;
4461
4462 mutex_lock(&devlink->lock);
4463 for (i = 0; i < params_count; i++, param++) {
4464 if (!param || !param->name || !param->supported_cmodes) {
4465 err = -EINVAL;
4466 goto rollback;
4467 }
4468 if (param->generic) {
4469 err = devlink_param_generic_verify(param);
4470 if (err)
4471 goto rollback;
4472 } else {
4473 err = devlink_param_driver_verify(param);
4474 if (err)
4475 goto rollback;
4476 }
4477 err = devlink_param_register_one(devlink, param);
4478 if (err)
4479 goto rollback;
4480 }
4481
4482 mutex_unlock(&devlink->lock);
4483 return 0;
4484
4485 rollback:
4486 if (!i)
4487 goto unlock;
4488 for (param--; i > 0; i--, param--)
4489 devlink_param_unregister_one(devlink, param);
4490 unlock:
4491 mutex_unlock(&devlink->lock);
4492 return err;
4493 }
4494 EXPORT_SYMBOL_GPL(devlink_params_register);
4495
4496 /**
4497 * devlink_params_unregister - unregister configuration parameters
4498 * @devlink: devlink
4499 * @params: configuration parameters to unregister
4500 * @params_count: number of parameters provided
4501 */
4502 void devlink_params_unregister(struct devlink *devlink,
4503 const struct devlink_param *params,
4504 size_t params_count)
4505 {
4506 const struct devlink_param *param = params;
4507 int i;
4508
4509 mutex_lock(&devlink->lock);
4510 for (i = 0; i < params_count; i++, param++)
4511 devlink_param_unregister_one(devlink, param);
4512 mutex_unlock(&devlink->lock);
4513 }
4514 EXPORT_SYMBOL_GPL(devlink_params_unregister);
4515
4516 /**
4517 * devlink_param_driverinit_value_get - get configuration parameter
4518 * value for driver initializing
4519 *
4520 * @devlink: devlink
4521 * @param_id: parameter ID
4522 * @init_val: value of parameter in driverinit configuration mode
4523 *
4524 * This function should be used by the driver to get driverinit
4525 * configuration for initialization after reload command.
4526 */
4527 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
4528 union devlink_param_value *init_val)
4529 {
4530 struct devlink_param_item *param_item;
4531
4532 if (!devlink->ops || !devlink->ops->reload)
4533 return -EOPNOTSUPP;
4534
4535 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4536 if (!param_item)
4537 return -EINVAL;
4538
4539 if (!param_item->driverinit_value_valid ||
4540 !devlink_param_cmode_is_supported(param_item->param,
4541 DEVLINK_PARAM_CMODE_DRIVERINIT))
4542 return -EOPNOTSUPP;
4543
4544 *init_val = param_item->driverinit_value;
4545
4546 return 0;
4547 }
4548 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
4549
4550 /**
4551 * devlink_param_driverinit_value_set - set value of configuration
4552 * parameter for driverinit
4553 * configuration mode
4554 *
4555 * @devlink: devlink
4556 * @param_id: parameter ID
4557 * @init_val: value of parameter to set for driverinit configuration mode
4558 *
4559 * This function should be used by the driver to set driverinit
4560 * configuration mode default value.
4561 */
4562 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
4563 union devlink_param_value init_val)
4564 {
4565 struct devlink_param_item *param_item;
4566
4567 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4568 if (!param_item)
4569 return -EINVAL;
4570
4571 if (!devlink_param_cmode_is_supported(param_item->param,
4572 DEVLINK_PARAM_CMODE_DRIVERINIT))
4573 return -EOPNOTSUPP;
4574
4575 param_item->driverinit_value = init_val;
4576 param_item->driverinit_value_valid = true;
4577
4578 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
4579 return 0;
4580 }
4581 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
4582
4583 /**
4584 * devlink_param_value_changed - notify devlink on a parameter's value
4585 * change. Should be called by the driver
4586 * right after the change.
4587 *
4588 * @devlink: devlink
4589 * @param_id: parameter ID
4590 *
4591 * This function should be used by the driver to notify devlink on value
4592 * change, excluding driverinit configuration mode.
4593 * For driverinit configuration mode driver should use the function
4594 * devlink_param_driverinit_value_set() instead.
4595 */
4596 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
4597 {
4598 struct devlink_param_item *param_item;
4599
4600 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4601 WARN_ON(!param_item);
4602
4603 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
4604 }
4605 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
4606
4607 /**
4608 * devlink_region_create - create a new address region
4609 *
4610 * @devlink: devlink
4611 * @region_name: region name
4612 * @region_max_snapshots: Maximum supported number of snapshots for region
4613 * @region_size: size of region
4614 */
4615 struct devlink_region *devlink_region_create(struct devlink *devlink,
4616 const char *region_name,
4617 u32 region_max_snapshots,
4618 u64 region_size)
4619 {
4620 struct devlink_region *region;
4621 int err = 0;
4622
4623 mutex_lock(&devlink->lock);
4624
4625 if (devlink_region_get_by_name(devlink, region_name)) {
4626 err = -EEXIST;
4627 goto unlock;
4628 }
4629
4630 region = kzalloc(sizeof(*region), GFP_KERNEL);
4631 if (!region) {
4632 err = -ENOMEM;
4633 goto unlock;
4634 }
4635
4636 region->devlink = devlink;
4637 region->max_snapshots = region_max_snapshots;
4638 region->name = region_name;
4639 region->size = region_size;
4640 INIT_LIST_HEAD(&region->snapshot_list);
4641 list_add_tail(&region->list, &devlink->region_list);
4642 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
4643
4644 mutex_unlock(&devlink->lock);
4645 return region;
4646
4647 unlock:
4648 mutex_unlock(&devlink->lock);
4649 return ERR_PTR(err);
4650 }
4651 EXPORT_SYMBOL_GPL(devlink_region_create);
4652
4653 /**
4654 * devlink_region_destroy - destroy address region
4655 *
4656 * @region: devlink region to destroy
4657 */
4658 void devlink_region_destroy(struct devlink_region *region)
4659 {
4660 struct devlink *devlink = region->devlink;
4661 struct devlink_snapshot *snapshot, *ts;
4662
4663 mutex_lock(&devlink->lock);
4664
4665 /* Free all snapshots of region */
4666 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
4667 devlink_region_snapshot_del(snapshot);
4668
4669 list_del(&region->list);
4670
4671 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
4672 mutex_unlock(&devlink->lock);
4673 kfree(region);
4674 }
4675 EXPORT_SYMBOL_GPL(devlink_region_destroy);
4676
4677 /**
4678 * devlink_region_shapshot_id_get - get snapshot ID
4679 *
4680 * This callback should be called when adding a new snapshot,
4681 * Driver should use the same id for multiple snapshots taken
4682 * on multiple regions at the same time/by the same trigger.
4683 *
4684 * @devlink: devlink
4685 */
4686 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
4687 {
4688 u32 id;
4689
4690 mutex_lock(&devlink->lock);
4691 id = ++devlink->snapshot_id;
4692 mutex_unlock(&devlink->lock);
4693
4694 return id;
4695 }
4696 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
4697
4698 /**
4699 * devlink_region_snapshot_create - create a new snapshot
4700 * This will add a new snapshot of a region. The snapshot
4701 * will be stored on the region struct and can be accessed
4702 * from devlink. This is useful for future analyses of snapshots.
4703 * Multiple snapshots can be created on a region.
4704 * The @snapshot_id should be obtained using the getter function.
4705 *
4706 * @devlink_region: devlink region of the snapshot
4707 * @data_len: size of snapshot data
4708 * @data: snapshot data
4709 * @snapshot_id: snapshot id to be created
4710 * @data_destructor: pointer to destructor function to free data
4711 */
4712 int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
4713 u8 *data, u32 snapshot_id,
4714 devlink_snapshot_data_dest_t *data_destructor)
4715 {
4716 struct devlink *devlink = region->devlink;
4717 struct devlink_snapshot *snapshot;
4718 int err;
4719
4720 mutex_lock(&devlink->lock);
4721
4722 /* check if region can hold one more snapshot */
4723 if (region->cur_snapshots == region->max_snapshots) {
4724 err = -ENOMEM;
4725 goto unlock;
4726 }
4727
4728 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4729 err = -EEXIST;
4730 goto unlock;
4731 }
4732
4733 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
4734 if (!snapshot) {
4735 err = -ENOMEM;
4736 goto unlock;
4737 }
4738
4739 snapshot->id = snapshot_id;
4740 snapshot->region = region;
4741 snapshot->data = data;
4742 snapshot->data_len = data_len;
4743 snapshot->data_destructor = data_destructor;
4744
4745 list_add_tail(&snapshot->list, &region->snapshot_list);
4746
4747 region->cur_snapshots++;
4748
4749 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
4750 mutex_unlock(&devlink->lock);
4751 return 0;
4752
4753 unlock:
4754 mutex_unlock(&devlink->lock);
4755 return err;
4756 }
4757 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
4758
4759 static int __init devlink_module_init(void)
4760 {
4761 return genl_register_family(&devlink_nl_family);
4762 }
4763
4764 static void __exit devlink_module_exit(void)
4765 {
4766 genl_unregister_family(&devlink_nl_family);
4767 }
4768
4769 module_init(devlink_module_init);
4770 module_exit(devlink_module_exit);
4771
4772 MODULE_LICENSE("GPL v2");
4773 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
4774 MODULE_DESCRIPTION("Network physical device Netlink interface");
4775 MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME);
(deprecated) Btrfs devel tree