Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
32EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
33
34static LIST_HEAD(devlink_list);
35
36/* devlink_mutex
37 *
38 * An overall lock guarding every operation coming from userspace.
39 * It also guards devlink devices list and it is taken when
40 * driver registers/unregisters it.
41 */
42static DEFINE_MUTEX(devlink_mutex);
43
44/* devlink_port_mutex
45 *
46 * Shared lock to guard lists of ports in all devlink devices.
47 */
48static DEFINE_MUTEX(devlink_port_mutex);
49
50static struct net *devlink_net(const struct devlink *devlink)
51{
52 return read_pnet(&devlink->_net);
53}
54
55static void devlink_net_set(struct devlink *devlink, struct net *net)
56{
57 write_pnet(&devlink->_net, net);
58}
59
60static struct devlink *devlink_get_from_attrs(struct net *net,
61 struct nlattr **attrs)
62{
63 struct devlink *devlink;
64 char *busname;
65 char *devname;
66
67 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
68 return ERR_PTR(-EINVAL);
69
70 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
71 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
72
73 list_for_each_entry(devlink, &devlink_list, list) {
74 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
75 strcmp(dev_name(devlink->dev), devname) == 0 &&
76 net_eq(devlink_net(devlink), net))
77 return devlink;
78 }
79
80 return ERR_PTR(-ENODEV);
81}
82
83static struct devlink *devlink_get_from_info(struct genl_info *info)
84{
85 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
86}
87
88static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
89 int port_index)
90{
91 struct devlink_port *devlink_port;
92
93 list_for_each_entry(devlink_port, &devlink->port_list, list) {
94 if (devlink_port->index == port_index)
95 return devlink_port;
96 }
97 return NULL;
98}
99
100static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
101{
102 return devlink_port_get_by_index(devlink, port_index);
103}
104
105static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
106 struct nlattr **attrs)
107{
108 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
109 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
110 struct devlink_port *devlink_port;
111
112 devlink_port = devlink_port_get_by_index(devlink, port_index);
113 if (!devlink_port)
114 return ERR_PTR(-ENODEV);
115 return devlink_port;
116 }
117 return ERR_PTR(-EINVAL);
118}
119
120static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
121 struct genl_info *info)
122{
123 return devlink_port_get_from_attrs(devlink, info->attrs);
124}
125
126struct devlink_sb {
127 struct list_head list;
128 unsigned int index;
129 u32 size;
130 u16 ingress_pools_count;
131 u16 egress_pools_count;
132 u16 ingress_tc_count;
133 u16 egress_tc_count;
134};
135
136static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
137{
138 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
139}
140
141static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
142 unsigned int sb_index)
143{
144 struct devlink_sb *devlink_sb;
145
146 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
147 if (devlink_sb->index == sb_index)
148 return devlink_sb;
149 }
150 return NULL;
151}
152
153static bool devlink_sb_index_exists(struct devlink *devlink,
154 unsigned int sb_index)
155{
156 return devlink_sb_get_by_index(devlink, sb_index);
157}
158
159static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
160 struct nlattr **attrs)
161{
162 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
163 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
164 struct devlink_sb *devlink_sb;
165
166 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
167 if (!devlink_sb)
168 return ERR_PTR(-ENODEV);
169 return devlink_sb;
170 }
171 return ERR_PTR(-EINVAL);
172}
173
174static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
175 struct genl_info *info)
176{
177 return devlink_sb_get_from_attrs(devlink, info->attrs);
178}
179
180static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
181 struct nlattr **attrs,
182 u16 *p_pool_index)
183{
184 u16 val;
185
186 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
187 return -EINVAL;
188
189 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
190 if (val >= devlink_sb_pool_count(devlink_sb))
191 return -EINVAL;
192 *p_pool_index = val;
193 return 0;
194}
195
196static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
197 struct genl_info *info,
198 u16 *p_pool_index)
199{
200 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
201 p_pool_index);
202}
203
204static int
205devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
206 enum devlink_sb_pool_type *p_pool_type)
207{
208 u8 val;
209
210 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
211 return -EINVAL;
212
213 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
214 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
215 val != DEVLINK_SB_POOL_TYPE_EGRESS)
216 return -EINVAL;
217 *p_pool_type = val;
218 return 0;
219}
220
221static int
222devlink_sb_pool_type_get_from_info(struct genl_info *info,
223 enum devlink_sb_pool_type *p_pool_type)
224{
225 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
226}
227
228static int
229devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
230 enum devlink_sb_threshold_type *p_th_type)
231{
232 u8 val;
233
234 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
235 return -EINVAL;
236
237 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
238 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
239 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
240 return -EINVAL;
241 *p_th_type = val;
242 return 0;
243}
244
245static int
246devlink_sb_th_type_get_from_info(struct genl_info *info,
247 enum devlink_sb_threshold_type *p_th_type)
248{
249 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
250}
251
252static int
253devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
254 struct nlattr **attrs,
255 enum devlink_sb_pool_type pool_type,
256 u16 *p_tc_index)
257{
258 u16 val;
259
260 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
261 return -EINVAL;
262
263 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
264 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
265 val >= devlink_sb->ingress_tc_count)
266 return -EINVAL;
267 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
268 val >= devlink_sb->egress_tc_count)
269 return -EINVAL;
270 *p_tc_index = val;
271 return 0;
272}
273
274static int
275devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
276 struct genl_info *info,
277 enum devlink_sb_pool_type pool_type,
278 u16 *p_tc_index)
279{
280 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
281 pool_type, p_tc_index);
282}
283
284#define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
285#define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
286#define DEVLINK_NL_FLAG_NEED_SB BIT(2)
287#define DEVLINK_NL_FLAG_LOCK_PORTS BIT(3)
288 /* port is not needed but we need to ensure they don't
289 * change in the middle of command
290 */
291
292static int devlink_nl_pre_doit(const struct genl_ops *ops,
293 struct sk_buff *skb, struct genl_info *info)
294{
295 struct devlink *devlink;
296
297 mutex_lock(&devlink_mutex);
298 devlink = devlink_get_from_info(info);
299 if (IS_ERR(devlink)) {
300 mutex_unlock(&devlink_mutex);
301 return PTR_ERR(devlink);
302 }
303 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
304 info->user_ptr[0] = devlink;
305 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
306 struct devlink_port *devlink_port;
307
308 mutex_lock(&devlink_port_mutex);
309 devlink_port = devlink_port_get_from_info(devlink, info);
310 if (IS_ERR(devlink_port)) {
311 mutex_unlock(&devlink_port_mutex);
312 mutex_unlock(&devlink_mutex);
313 return PTR_ERR(devlink_port);
314 }
315 info->user_ptr[0] = devlink_port;
316 }
317 if (ops->internal_flags & DEVLINK_NL_FLAG_LOCK_PORTS) {
318 mutex_lock(&devlink_port_mutex);
319 }
320 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
321 struct devlink_sb *devlink_sb;
322
323 devlink_sb = devlink_sb_get_from_info(devlink, info);
324 if (IS_ERR(devlink_sb)) {
325 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT)
326 mutex_unlock(&devlink_port_mutex);
327 mutex_unlock(&devlink_mutex);
328 return PTR_ERR(devlink_sb);
329 }
330 info->user_ptr[1] = devlink_sb;
331 }
332 return 0;
333}
334
335static void devlink_nl_post_doit(const struct genl_ops *ops,
336 struct sk_buff *skb, struct genl_info *info)
337{
338 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT ||
339 ops->internal_flags & DEVLINK_NL_FLAG_LOCK_PORTS)
340 mutex_unlock(&devlink_port_mutex);
341 mutex_unlock(&devlink_mutex);
342}
343
344static struct genl_family devlink_nl_family;
345
346enum devlink_multicast_groups {
347 DEVLINK_MCGRP_CONFIG,
348};
349
350static const struct genl_multicast_group devlink_nl_mcgrps[] = {
351 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
352};
353
354static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
355{
356 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
357 return -EMSGSIZE;
358 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
359 return -EMSGSIZE;
360 return 0;
361}
362
363static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
364 enum devlink_command cmd, u32 portid,
365 u32 seq, int flags)
366{
367 void *hdr;
368
369 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
370 if (!hdr)
371 return -EMSGSIZE;
372
373 if (devlink_nl_put_handle(msg, devlink))
374 goto nla_put_failure;
375
376 genlmsg_end(msg, hdr);
377 return 0;
378
379nla_put_failure:
380 genlmsg_cancel(msg, hdr);
381 return -EMSGSIZE;
382}
383
384static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
385{
386 struct sk_buff *msg;
387 int err;
388
389 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
390
391 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
392 if (!msg)
393 return;
394
395 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
396 if (err) {
397 nlmsg_free(msg);
398 return;
399 }
400
401 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
402 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
403}
404
405static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
406 struct devlink_port *devlink_port,
407 enum devlink_command cmd, u32 portid,
408 u32 seq, int flags)
409{
410 void *hdr;
411
412 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
413 if (!hdr)
414 return -EMSGSIZE;
415
416 if (devlink_nl_put_handle(msg, devlink))
417 goto nla_put_failure;
418 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
419 goto nla_put_failure;
420 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
421 goto nla_put_failure;
422 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
423 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
424 devlink_port->desired_type))
425 goto nla_put_failure;
426 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
427 struct net_device *netdev = devlink_port->type_dev;
428
429 if (netdev &&
430 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
431 netdev->ifindex) ||
432 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
433 netdev->name)))
434 goto nla_put_failure;
435 }
436 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
437 struct ib_device *ibdev = devlink_port->type_dev;
438
439 if (ibdev &&
440 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
441 ibdev->name))
442 goto nla_put_failure;
443 }
444 if (devlink_port->split &&
445 nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
446 devlink_port->split_group))
447 goto nla_put_failure;
448
449 genlmsg_end(msg, hdr);
450 return 0;
451
452nla_put_failure:
453 genlmsg_cancel(msg, hdr);
454 return -EMSGSIZE;
455}
456
457static void devlink_port_notify(struct devlink_port *devlink_port,
458 enum devlink_command cmd)
459{
460 struct devlink *devlink = devlink_port->devlink;
461 struct sk_buff *msg;
462 int err;
463
464 if (!devlink_port->registered)
465 return;
466
467 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
468
469 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
470 if (!msg)
471 return;
472
473 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
474 if (err) {
475 nlmsg_free(msg);
476 return;
477 }
478
479 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
480 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
481}
482
483static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
484{
485 struct devlink *devlink = info->user_ptr[0];
486 struct sk_buff *msg;
487 int err;
488
489 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
490 if (!msg)
491 return -ENOMEM;
492
493 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
494 info->snd_portid, info->snd_seq, 0);
495 if (err) {
496 nlmsg_free(msg);
497 return err;
498 }
499
500 return genlmsg_reply(msg, info);
501}
502
503static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
504 struct netlink_callback *cb)
505{
506 struct devlink *devlink;
507 int start = cb->args[0];
508 int idx = 0;
509 int err;
510
511 mutex_lock(&devlink_mutex);
512 list_for_each_entry(devlink, &devlink_list, list) {
513 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
514 continue;
515 if (idx < start) {
516 idx++;
517 continue;
518 }
519 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
520 NETLINK_CB(cb->skb).portid,
521 cb->nlh->nlmsg_seq, NLM_F_MULTI);
522 if (err)
523 goto out;
524 idx++;
525 }
526out:
527 mutex_unlock(&devlink_mutex);
528
529 cb->args[0] = idx;
530 return msg->len;
531}
532
533static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
534 struct genl_info *info)
535{
536 struct devlink_port *devlink_port = info->user_ptr[0];
537 struct devlink *devlink = devlink_port->devlink;
538 struct sk_buff *msg;
539 int err;
540
541 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
542 if (!msg)
543 return -ENOMEM;
544
545 err = devlink_nl_port_fill(msg, devlink, devlink_port,
546 DEVLINK_CMD_PORT_NEW,
547 info->snd_portid, info->snd_seq, 0);
548 if (err) {
549 nlmsg_free(msg);
550 return err;
551 }
552
553 return genlmsg_reply(msg, info);
554}
555
556static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
557 struct netlink_callback *cb)
558{
559 struct devlink *devlink;
560 struct devlink_port *devlink_port;
561 int start = cb->args[0];
562 int idx = 0;
563 int err;
564
565 mutex_lock(&devlink_mutex);
566 mutex_lock(&devlink_port_mutex);
567 list_for_each_entry(devlink, &devlink_list, list) {
568 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
569 continue;
570 list_for_each_entry(devlink_port, &devlink->port_list, list) {
571 if (idx < start) {
572 idx++;
573 continue;
574 }
575 err = devlink_nl_port_fill(msg, devlink, devlink_port,
576 DEVLINK_CMD_NEW,
577 NETLINK_CB(cb->skb).portid,
578 cb->nlh->nlmsg_seq,
579 NLM_F_MULTI);
580 if (err)
581 goto out;
582 idx++;
583 }
584 }
585out:
586 mutex_unlock(&devlink_port_mutex);
587 mutex_unlock(&devlink_mutex);
588
589 cb->args[0] = idx;
590 return msg->len;
591}
592
593static int devlink_port_type_set(struct devlink *devlink,
594 struct devlink_port *devlink_port,
595 enum devlink_port_type port_type)
596
597{
598 int err;
599
600 if (devlink->ops && devlink->ops->port_type_set) {
601 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
602 return -EINVAL;
603 if (port_type == devlink_port->type)
604 return 0;
605 err = devlink->ops->port_type_set(devlink_port, port_type);
606 if (err)
607 return err;
608 devlink_port->desired_type = port_type;
609 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
610 return 0;
611 }
612 return -EOPNOTSUPP;
613}
614
615static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
616 struct genl_info *info)
617{
618 struct devlink_port *devlink_port = info->user_ptr[0];
619 struct devlink *devlink = devlink_port->devlink;
620 int err;
621
622 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
623 enum devlink_port_type port_type;
624
625 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
626 err = devlink_port_type_set(devlink, devlink_port, port_type);
627 if (err)
628 return err;
629 }
630 return 0;
631}
632
633static int devlink_port_split(struct devlink *devlink,
634 u32 port_index, u32 count)
635
636{
637 if (devlink->ops && devlink->ops->port_split)
638 return devlink->ops->port_split(devlink, port_index, count);
639 return -EOPNOTSUPP;
640}
641
642static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
643 struct genl_info *info)
644{
645 struct devlink *devlink = info->user_ptr[0];
646 u32 port_index;
647 u32 count;
648
649 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
650 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
651 return -EINVAL;
652
653 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
654 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
655 return devlink_port_split(devlink, port_index, count);
656}
657
658static int devlink_port_unsplit(struct devlink *devlink, u32 port_index)
659
660{
661 if (devlink->ops && devlink->ops->port_unsplit)
662 return devlink->ops->port_unsplit(devlink, port_index);
663 return -EOPNOTSUPP;
664}
665
666static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
667 struct genl_info *info)
668{
669 struct devlink *devlink = info->user_ptr[0];
670 u32 port_index;
671
672 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
673 return -EINVAL;
674
675 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
676 return devlink_port_unsplit(devlink, port_index);
677}
678
679static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
680 struct devlink_sb *devlink_sb,
681 enum devlink_command cmd, u32 portid,
682 u32 seq, int flags)
683{
684 void *hdr;
685
686 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
687 if (!hdr)
688 return -EMSGSIZE;
689
690 if (devlink_nl_put_handle(msg, devlink))
691 goto nla_put_failure;
692 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
693 goto nla_put_failure;
694 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
695 goto nla_put_failure;
696 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
697 devlink_sb->ingress_pools_count))
698 goto nla_put_failure;
699 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
700 devlink_sb->egress_pools_count))
701 goto nla_put_failure;
702 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
703 devlink_sb->ingress_tc_count))
704 goto nla_put_failure;
705 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
706 devlink_sb->egress_tc_count))
707 goto nla_put_failure;
708
709 genlmsg_end(msg, hdr);
710 return 0;
711
712nla_put_failure:
713 genlmsg_cancel(msg, hdr);
714 return -EMSGSIZE;
715}
716
717static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
718 struct genl_info *info)
719{
720 struct devlink *devlink = info->user_ptr[0];
721 struct devlink_sb *devlink_sb = info->user_ptr[1];
722 struct sk_buff *msg;
723 int err;
724
725 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
726 if (!msg)
727 return -ENOMEM;
728
729 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
730 DEVLINK_CMD_SB_NEW,
731 info->snd_portid, info->snd_seq, 0);
732 if (err) {
733 nlmsg_free(msg);
734 return err;
735 }
736
737 return genlmsg_reply(msg, info);
738}
739
740static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
741 struct netlink_callback *cb)
742{
743 struct devlink *devlink;
744 struct devlink_sb *devlink_sb;
745 int start = cb->args[0];
746 int idx = 0;
747 int err;
748
749 mutex_lock(&devlink_mutex);
750 list_for_each_entry(devlink, &devlink_list, list) {
751 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
752 continue;
753 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
754 if (idx < start) {
755 idx++;
756 continue;
757 }
758 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
759 DEVLINK_CMD_SB_NEW,
760 NETLINK_CB(cb->skb).portid,
761 cb->nlh->nlmsg_seq,
762 NLM_F_MULTI);
763 if (err)
764 goto out;
765 idx++;
766 }
767 }
768out:
769 mutex_unlock(&devlink_mutex);
770
771 cb->args[0] = idx;
772 return msg->len;
773}
774
775static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
776 struct devlink_sb *devlink_sb,
777 u16 pool_index, enum devlink_command cmd,
778 u32 portid, u32 seq, int flags)
779{
780 struct devlink_sb_pool_info pool_info;
781 void *hdr;
782 int err;
783
784 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
785 pool_index, &pool_info);
786 if (err)
787 return err;
788
789 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
790 if (!hdr)
791 return -EMSGSIZE;
792
793 if (devlink_nl_put_handle(msg, devlink))
794 goto nla_put_failure;
795 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
796 goto nla_put_failure;
797 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
798 goto nla_put_failure;
799 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
800 goto nla_put_failure;
801 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
802 goto nla_put_failure;
803 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
804 pool_info.threshold_type))
805 goto nla_put_failure;
806
807 genlmsg_end(msg, hdr);
808 return 0;
809
810nla_put_failure:
811 genlmsg_cancel(msg, hdr);
812 return -EMSGSIZE;
813}
814
815static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
816 struct genl_info *info)
817{
818 struct devlink *devlink = info->user_ptr[0];
819 struct devlink_sb *devlink_sb = info->user_ptr[1];
820 struct sk_buff *msg;
821 u16 pool_index;
822 int err;
823
824 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
825 &pool_index);
826 if (err)
827 return err;
828
829 if (!devlink->ops || !devlink->ops->sb_pool_get)
830 return -EOPNOTSUPP;
831
832 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
833 if (!msg)
834 return -ENOMEM;
835
836 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
837 DEVLINK_CMD_SB_POOL_NEW,
838 info->snd_portid, info->snd_seq, 0);
839 if (err) {
840 nlmsg_free(msg);
841 return err;
842 }
843
844 return genlmsg_reply(msg, info);
845}
846
847static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
848 struct devlink *devlink,
849 struct devlink_sb *devlink_sb,
850 u32 portid, u32 seq)
851{
852 u16 pool_count = devlink_sb_pool_count(devlink_sb);
853 u16 pool_index;
854 int err;
855
856 for (pool_index = 0; pool_index < pool_count; pool_index++) {
857 if (*p_idx < start) {
858 (*p_idx)++;
859 continue;
860 }
861 err = devlink_nl_sb_pool_fill(msg, devlink,
862 devlink_sb,
863 pool_index,
864 DEVLINK_CMD_SB_POOL_NEW,
865 portid, seq, NLM_F_MULTI);
866 if (err)
867 return err;
868 (*p_idx)++;
869 }
870 return 0;
871}
872
873static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
874 struct netlink_callback *cb)
875{
876 struct devlink *devlink;
877 struct devlink_sb *devlink_sb;
878 int start = cb->args[0];
879 int idx = 0;
880 int err;
881
882 mutex_lock(&devlink_mutex);
883 list_for_each_entry(devlink, &devlink_list, list) {
884 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
885 !devlink->ops || !devlink->ops->sb_pool_get)
886 continue;
887 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
888 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
889 devlink_sb,
890 NETLINK_CB(cb->skb).portid,
891 cb->nlh->nlmsg_seq);
892 if (err && err != -EOPNOTSUPP)
893 goto out;
894 }
895 }
896out:
897 mutex_unlock(&devlink_mutex);
898
899 cb->args[0] = idx;
900 return msg->len;
901}
902
903static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
904 u16 pool_index, u32 size,
905 enum devlink_sb_threshold_type threshold_type)
906
907{
908 const struct devlink_ops *ops = devlink->ops;
909
910 if (ops && ops->sb_pool_set)
911 return ops->sb_pool_set(devlink, sb_index, pool_index,
912 size, threshold_type);
913 return -EOPNOTSUPP;
914}
915
916static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
917 struct genl_info *info)
918{
919 struct devlink *devlink = info->user_ptr[0];
920 struct devlink_sb *devlink_sb = info->user_ptr[1];
921 enum devlink_sb_threshold_type threshold_type;
922 u16 pool_index;
923 u32 size;
924 int err;
925
926 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
927 &pool_index);
928 if (err)
929 return err;
930
931 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
932 if (err)
933 return err;
934
935 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
936 return -EINVAL;
937
938 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
939 return devlink_sb_pool_set(devlink, devlink_sb->index,
940 pool_index, size, threshold_type);
941}
942
943static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
944 struct devlink *devlink,
945 struct devlink_port *devlink_port,
946 struct devlink_sb *devlink_sb,
947 u16 pool_index,
948 enum devlink_command cmd,
949 u32 portid, u32 seq, int flags)
950{
951 const struct devlink_ops *ops = devlink->ops;
952 u32 threshold;
953 void *hdr;
954 int err;
955
956 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
957 pool_index, &threshold);
958 if (err)
959 return err;
960
961 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
962 if (!hdr)
963 return -EMSGSIZE;
964
965 if (devlink_nl_put_handle(msg, devlink))
966 goto nla_put_failure;
967 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
968 goto nla_put_failure;
969 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
970 goto nla_put_failure;
971 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
972 goto nla_put_failure;
973 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
974 goto nla_put_failure;
975
976 if (ops->sb_occ_port_pool_get) {
977 u32 cur;
978 u32 max;
979
980 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
981 pool_index, &cur, &max);
982 if (err && err != -EOPNOTSUPP)
983 return err;
984 if (!err) {
985 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
986 goto nla_put_failure;
987 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
988 goto nla_put_failure;
989 }
990 }
991
992 genlmsg_end(msg, hdr);
993 return 0;
994
995nla_put_failure:
996 genlmsg_cancel(msg, hdr);
997 return -EMSGSIZE;
998}
999
1000static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1001 struct genl_info *info)
1002{
1003 struct devlink_port *devlink_port = info->user_ptr[0];
1004 struct devlink *devlink = devlink_port->devlink;
1005 struct devlink_sb *devlink_sb = info->user_ptr[1];
1006 struct sk_buff *msg;
1007 u16 pool_index;
1008 int err;
1009
1010 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1011 &pool_index);
1012 if (err)
1013 return err;
1014
1015 if (!devlink->ops || !devlink->ops->sb_port_pool_get)
1016 return -EOPNOTSUPP;
1017
1018 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1019 if (!msg)
1020 return -ENOMEM;
1021
1022 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1023 devlink_sb, pool_index,
1024 DEVLINK_CMD_SB_PORT_POOL_NEW,
1025 info->snd_portid, info->snd_seq, 0);
1026 if (err) {
1027 nlmsg_free(msg);
1028 return err;
1029 }
1030
1031 return genlmsg_reply(msg, info);
1032}
1033
1034static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1035 struct devlink *devlink,
1036 struct devlink_sb *devlink_sb,
1037 u32 portid, u32 seq)
1038{
1039 struct devlink_port *devlink_port;
1040 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1041 u16 pool_index;
1042 int err;
1043
1044 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1045 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1046 if (*p_idx < start) {
1047 (*p_idx)++;
1048 continue;
1049 }
1050 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1051 devlink_port,
1052 devlink_sb,
1053 pool_index,
1054 DEVLINK_CMD_SB_PORT_POOL_NEW,
1055 portid, seq,
1056 NLM_F_MULTI);
1057 if (err)
1058 return err;
1059 (*p_idx)++;
1060 }
1061 }
1062 return 0;
1063}
1064
1065static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1066 struct netlink_callback *cb)
1067{
1068 struct devlink *devlink;
1069 struct devlink_sb *devlink_sb;
1070 int start = cb->args[0];
1071 int idx = 0;
1072 int err;
1073
1074 mutex_lock(&devlink_mutex);
1075 mutex_lock(&devlink_port_mutex);
1076 list_for_each_entry(devlink, &devlink_list, list) {
1077 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1078 !devlink->ops || !devlink->ops->sb_port_pool_get)
1079 continue;
1080 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1081 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1082 devlink, devlink_sb,
1083 NETLINK_CB(cb->skb).portid,
1084 cb->nlh->nlmsg_seq);
1085 if (err && err != -EOPNOTSUPP)
1086 goto out;
1087 }
1088 }
1089out:
1090 mutex_unlock(&devlink_port_mutex);
1091 mutex_unlock(&devlink_mutex);
1092
1093 cb->args[0] = idx;
1094 return msg->len;
1095}
1096
1097static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1098 unsigned int sb_index, u16 pool_index,
1099 u32 threshold)
1100
1101{
1102 const struct devlink_ops *ops = devlink_port->devlink->ops;
1103
1104 if (ops && ops->sb_port_pool_set)
1105 return ops->sb_port_pool_set(devlink_port, sb_index,
1106 pool_index, threshold);
1107 return -EOPNOTSUPP;
1108}
1109
1110static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1111 struct genl_info *info)
1112{
1113 struct devlink_port *devlink_port = info->user_ptr[0];
1114 struct devlink_sb *devlink_sb = info->user_ptr[1];
1115 u16 pool_index;
1116 u32 threshold;
1117 int err;
1118
1119 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1120 &pool_index);
1121 if (err)
1122 return err;
1123
1124 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1125 return -EINVAL;
1126
1127 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1128 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1129 pool_index, threshold);
1130}
1131
1132static int
1133devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1134 struct devlink_port *devlink_port,
1135 struct devlink_sb *devlink_sb, u16 tc_index,
1136 enum devlink_sb_pool_type pool_type,
1137 enum devlink_command cmd,
1138 u32 portid, u32 seq, int flags)
1139{
1140 const struct devlink_ops *ops = devlink->ops;
1141 u16 pool_index;
1142 u32 threshold;
1143 void *hdr;
1144 int err;
1145
1146 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1147 tc_index, pool_type,
1148 &pool_index, &threshold);
1149 if (err)
1150 return err;
1151
1152 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1153 if (!hdr)
1154 return -EMSGSIZE;
1155
1156 if (devlink_nl_put_handle(msg, devlink))
1157 goto nla_put_failure;
1158 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1159 goto nla_put_failure;
1160 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1161 goto nla_put_failure;
1162 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1163 goto nla_put_failure;
1164 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1165 goto nla_put_failure;
1166 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1167 goto nla_put_failure;
1168 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1169 goto nla_put_failure;
1170
1171 if (ops->sb_occ_tc_port_bind_get) {
1172 u32 cur;
1173 u32 max;
1174
1175 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1176 devlink_sb->index,
1177 tc_index, pool_type,
1178 &cur, &max);
1179 if (err && err != -EOPNOTSUPP)
1180 return err;
1181 if (!err) {
1182 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1183 goto nla_put_failure;
1184 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1185 goto nla_put_failure;
1186 }
1187 }
1188
1189 genlmsg_end(msg, hdr);
1190 return 0;
1191
1192nla_put_failure:
1193 genlmsg_cancel(msg, hdr);
1194 return -EMSGSIZE;
1195}
1196
1197static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1198 struct genl_info *info)
1199{
1200 struct devlink_port *devlink_port = info->user_ptr[0];
1201 struct devlink *devlink = devlink_port->devlink;
1202 struct devlink_sb *devlink_sb = info->user_ptr[1];
1203 struct sk_buff *msg;
1204 enum devlink_sb_pool_type pool_type;
1205 u16 tc_index;
1206 int err;
1207
1208 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1209 if (err)
1210 return err;
1211
1212 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1213 pool_type, &tc_index);
1214 if (err)
1215 return err;
1216
1217 if (!devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1218 return -EOPNOTSUPP;
1219
1220 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1221 if (!msg)
1222 return -ENOMEM;
1223
1224 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1225 devlink_sb, tc_index, pool_type,
1226 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1227 info->snd_portid,
1228 info->snd_seq, 0);
1229 if (err) {
1230 nlmsg_free(msg);
1231 return err;
1232 }
1233
1234 return genlmsg_reply(msg, info);
1235}
1236
1237static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1238 int start, int *p_idx,
1239 struct devlink *devlink,
1240 struct devlink_sb *devlink_sb,
1241 u32 portid, u32 seq)
1242{
1243 struct devlink_port *devlink_port;
1244 u16 tc_index;
1245 int err;
1246
1247 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1248 for (tc_index = 0;
1249 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1250 if (*p_idx < start) {
1251 (*p_idx)++;
1252 continue;
1253 }
1254 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1255 devlink_port,
1256 devlink_sb,
1257 tc_index,
1258 DEVLINK_SB_POOL_TYPE_INGRESS,
1259 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1260 portid, seq,
1261 NLM_F_MULTI);
1262 if (err)
1263 return err;
1264 (*p_idx)++;
1265 }
1266 for (tc_index = 0;
1267 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1268 if (*p_idx < start) {
1269 (*p_idx)++;
1270 continue;
1271 }
1272 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1273 devlink_port,
1274 devlink_sb,
1275 tc_index,
1276 DEVLINK_SB_POOL_TYPE_EGRESS,
1277 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1278 portid, seq,
1279 NLM_F_MULTI);
1280 if (err)
1281 return err;
1282 (*p_idx)++;
1283 }
1284 }
1285 return 0;
1286}
1287
1288static int
1289devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1290 struct netlink_callback *cb)
1291{
1292 struct devlink *devlink;
1293 struct devlink_sb *devlink_sb;
1294 int start = cb->args[0];
1295 int idx = 0;
1296 int err;
1297
1298 mutex_lock(&devlink_mutex);
1299 mutex_lock(&devlink_port_mutex);
1300 list_for_each_entry(devlink, &devlink_list, list) {
1301 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1302 !devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1303 continue;
1304 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1305 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1306 devlink,
1307 devlink_sb,
1308 NETLINK_CB(cb->skb).portid,
1309 cb->nlh->nlmsg_seq);
1310 if (err && err != -EOPNOTSUPP)
1311 goto out;
1312 }
1313 }
1314out:
1315 mutex_unlock(&devlink_port_mutex);
1316 mutex_unlock(&devlink_mutex);
1317
1318 cb->args[0] = idx;
1319 return msg->len;
1320}
1321
1322static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1323 unsigned int sb_index, u16 tc_index,
1324 enum devlink_sb_pool_type pool_type,
1325 u16 pool_index, u32 threshold)
1326
1327{
1328 const struct devlink_ops *ops = devlink_port->devlink->ops;
1329
1330 if (ops && ops->sb_tc_pool_bind_set)
1331 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1332 tc_index, pool_type,
1333 pool_index, threshold);
1334 return -EOPNOTSUPP;
1335}
1336
1337static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1338 struct genl_info *info)
1339{
1340 struct devlink_port *devlink_port = info->user_ptr[0];
1341 struct devlink_sb *devlink_sb = info->user_ptr[1];
1342 enum devlink_sb_pool_type pool_type;
1343 u16 tc_index;
1344 u16 pool_index;
1345 u32 threshold;
1346 int err;
1347
1348 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1349 if (err)
1350 return err;
1351
1352 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1353 pool_type, &tc_index);
1354 if (err)
1355 return err;
1356
1357 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1358 &pool_index);
1359 if (err)
1360 return err;
1361
1362 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1363 return -EINVAL;
1364
1365 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1366 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1367 tc_index, pool_type,
1368 pool_index, threshold);
1369}
1370
1371static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1372 struct genl_info *info)
1373{
1374 struct devlink *devlink = info->user_ptr[0];
1375 struct devlink_sb *devlink_sb = info->user_ptr[1];
1376 const struct devlink_ops *ops = devlink->ops;
1377
1378 if (ops && ops->sb_occ_snapshot)
1379 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1380 return -EOPNOTSUPP;
1381}
1382
1383static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1384 struct genl_info *info)
1385{
1386 struct devlink *devlink = info->user_ptr[0];
1387 struct devlink_sb *devlink_sb = info->user_ptr[1];
1388 const struct devlink_ops *ops = devlink->ops;
1389
1390 if (ops && ops->sb_occ_max_clear)
1391 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1392 return -EOPNOTSUPP;
1393}
1394
1395static int devlink_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1396 enum devlink_command cmd, u32 portid,
1397 u32 seq, int flags)
1398{
1399 const struct devlink_ops *ops = devlink->ops;
1400 void *hdr;
1401 int err = 0;
1402 u16 mode;
1403 u8 inline_mode;
1404
1405 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1406 if (!hdr)
1407 return -EMSGSIZE;
1408
1409 err = devlink_nl_put_handle(msg, devlink);
1410 if (err)
1411 goto out;
1412
1413 err = ops->eswitch_mode_get(devlink, &mode);
1414 if (err)
1415 goto out;
1416 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1417 if (err)
1418 goto out;
1419
1420 if (ops->eswitch_inline_mode_get) {
1421 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1422 if (err)
1423 goto out;
1424 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1425 inline_mode);
1426 if (err)
1427 goto out;
1428 }
1429
1430 genlmsg_end(msg, hdr);
1431 return 0;
1432
1433out:
1434 genlmsg_cancel(msg, hdr);
1435 return err;
1436}
1437
1438static int devlink_nl_cmd_eswitch_mode_get_doit(struct sk_buff *skb,
1439 struct genl_info *info)
1440{
1441 struct devlink *devlink = info->user_ptr[0];
1442 const struct devlink_ops *ops = devlink->ops;
1443 struct sk_buff *msg;
1444 int err;
1445
1446 if (!ops || !ops->eswitch_mode_get)
1447 return -EOPNOTSUPP;
1448
1449 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1450 if (!msg)
1451 return -ENOMEM;
1452
1453 err = devlink_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_MODE_GET,
1454 info->snd_portid, info->snd_seq, 0);
1455
1456 if (err) {
1457 nlmsg_free(msg);
1458 return err;
1459 }
1460
1461 return genlmsg_reply(msg, info);
1462}
1463
1464static int devlink_nl_cmd_eswitch_mode_set_doit(struct sk_buff *skb,
1465 struct genl_info *info)
1466{
1467 struct devlink *devlink = info->user_ptr[0];
1468 const struct devlink_ops *ops = devlink->ops;
1469 u16 mode;
1470 u8 inline_mode;
1471 int err = 0;
1472
1473 if (!ops)
1474 return -EOPNOTSUPP;
1475
1476 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1477 if (!ops->eswitch_mode_set)
1478 return -EOPNOTSUPP;
1479 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1480 err = ops->eswitch_mode_set(devlink, mode);
1481 if (err)
1482 return err;
1483 }
1484
1485 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1486 if (!ops->eswitch_inline_mode_set)
1487 return -EOPNOTSUPP;
1488 inline_mode = nla_get_u8(
1489 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1490 err = ops->eswitch_inline_mode_set(devlink, inline_mode);
1491 if (err)
1492 return err;
1493 }
1494
1495 return 0;
1496}
1497
1498static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
1499 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
1500 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
1501 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
1502 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
1503 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
1504 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
1505 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
1506 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
1507 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
1508 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
1509 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
1510 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
1511 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
1512 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
1513};
1514
1515static const struct genl_ops devlink_nl_ops[] = {
1516 {
1517 .cmd = DEVLINK_CMD_GET,
1518 .doit = devlink_nl_cmd_get_doit,
1519 .dumpit = devlink_nl_cmd_get_dumpit,
1520 .policy = devlink_nl_policy,
1521 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1522 /* can be retrieved by unprivileged users */
1523 },
1524 {
1525 .cmd = DEVLINK_CMD_PORT_GET,
1526 .doit = devlink_nl_cmd_port_get_doit,
1527 .dumpit = devlink_nl_cmd_port_get_dumpit,
1528 .policy = devlink_nl_policy,
1529 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
1530 /* can be retrieved by unprivileged users */
1531 },
1532 {
1533 .cmd = DEVLINK_CMD_PORT_SET,
1534 .doit = devlink_nl_cmd_port_set_doit,
1535 .policy = devlink_nl_policy,
1536 .flags = GENL_ADMIN_PERM,
1537 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
1538 },
1539 {
1540 .cmd = DEVLINK_CMD_PORT_SPLIT,
1541 .doit = devlink_nl_cmd_port_split_doit,
1542 .policy = devlink_nl_policy,
1543 .flags = GENL_ADMIN_PERM,
1544 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1545 },
1546 {
1547 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
1548 .doit = devlink_nl_cmd_port_unsplit_doit,
1549 .policy = devlink_nl_policy,
1550 .flags = GENL_ADMIN_PERM,
1551 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1552 },
1553 {
1554 .cmd = DEVLINK_CMD_SB_GET,
1555 .doit = devlink_nl_cmd_sb_get_doit,
1556 .dumpit = devlink_nl_cmd_sb_get_dumpit,
1557 .policy = devlink_nl_policy,
1558 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1559 DEVLINK_NL_FLAG_NEED_SB,
1560 /* can be retrieved by unprivileged users */
1561 },
1562 {
1563 .cmd = DEVLINK_CMD_SB_POOL_GET,
1564 .doit = devlink_nl_cmd_sb_pool_get_doit,
1565 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
1566 .policy = devlink_nl_policy,
1567 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1568 DEVLINK_NL_FLAG_NEED_SB,
1569 /* can be retrieved by unprivileged users */
1570 },
1571 {
1572 .cmd = DEVLINK_CMD_SB_POOL_SET,
1573 .doit = devlink_nl_cmd_sb_pool_set_doit,
1574 .policy = devlink_nl_policy,
1575 .flags = GENL_ADMIN_PERM,
1576 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1577 DEVLINK_NL_FLAG_NEED_SB,
1578 },
1579 {
1580 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
1581 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
1582 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
1583 .policy = devlink_nl_policy,
1584 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1585 DEVLINK_NL_FLAG_NEED_SB,
1586 /* can be retrieved by unprivileged users */
1587 },
1588 {
1589 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
1590 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
1591 .policy = devlink_nl_policy,
1592 .flags = GENL_ADMIN_PERM,
1593 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1594 DEVLINK_NL_FLAG_NEED_SB,
1595 },
1596 {
1597 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
1598 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
1599 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
1600 .policy = devlink_nl_policy,
1601 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1602 DEVLINK_NL_FLAG_NEED_SB,
1603 /* can be retrieved by unprivileged users */
1604 },
1605 {
1606 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
1607 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
1608 .policy = devlink_nl_policy,
1609 .flags = GENL_ADMIN_PERM,
1610 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1611 DEVLINK_NL_FLAG_NEED_SB,
1612 },
1613 {
1614 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
1615 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
1616 .policy = devlink_nl_policy,
1617 .flags = GENL_ADMIN_PERM,
1618 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1619 DEVLINK_NL_FLAG_NEED_SB |
1620 DEVLINK_NL_FLAG_LOCK_PORTS,
1621 },
1622 {
1623 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
1624 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
1625 .policy = devlink_nl_policy,
1626 .flags = GENL_ADMIN_PERM,
1627 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1628 DEVLINK_NL_FLAG_NEED_SB |
1629 DEVLINK_NL_FLAG_LOCK_PORTS,
1630 },
1631 {
1632 .cmd = DEVLINK_CMD_ESWITCH_MODE_GET,
1633 .doit = devlink_nl_cmd_eswitch_mode_get_doit,
1634 .policy = devlink_nl_policy,
1635 .flags = GENL_ADMIN_PERM,
1636 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1637 },
1638 {
1639 .cmd = DEVLINK_CMD_ESWITCH_MODE_SET,
1640 .doit = devlink_nl_cmd_eswitch_mode_set_doit,
1641 .policy = devlink_nl_policy,
1642 .flags = GENL_ADMIN_PERM,
1643 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1644 },
1645};
1646
1647static struct genl_family devlink_nl_family __ro_after_init = {
1648 .name = DEVLINK_GENL_NAME,
1649 .version = DEVLINK_GENL_VERSION,
1650 .maxattr = DEVLINK_ATTR_MAX,
1651 .netnsok = true,
1652 .pre_doit = devlink_nl_pre_doit,
1653 .post_doit = devlink_nl_post_doit,
1654 .module = THIS_MODULE,
1655 .ops = devlink_nl_ops,
1656 .n_ops = ARRAY_SIZE(devlink_nl_ops),
1657 .mcgrps = devlink_nl_mcgrps,
1658 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
1659};
1660
1661/**
1662 * devlink_alloc - Allocate new devlink instance resources
1663 *
1664 * @ops: ops
1665 * @priv_size: size of user private data
1666 *
1667 * Allocate new devlink instance resources, including devlink index
1668 * and name.
1669 */
1670struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
1671{
1672 struct devlink *devlink;
1673
1674 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
1675 if (!devlink)
1676 return NULL;
1677 devlink->ops = ops;
1678 devlink_net_set(devlink, &init_net);
1679 INIT_LIST_HEAD(&devlink->port_list);
1680 INIT_LIST_HEAD(&devlink->sb_list);
1681 return devlink;
1682}
1683EXPORT_SYMBOL_GPL(devlink_alloc);
1684
1685/**
1686 * devlink_register - Register devlink instance
1687 *
1688 * @devlink: devlink
1689 */
1690int devlink_register(struct devlink *devlink, struct device *dev)
1691{
1692 mutex_lock(&devlink_mutex);
1693 devlink->dev = dev;
1694 list_add_tail(&devlink->list, &devlink_list);
1695 devlink_notify(devlink, DEVLINK_CMD_NEW);
1696 mutex_unlock(&devlink_mutex);
1697 return 0;
1698}
1699EXPORT_SYMBOL_GPL(devlink_register);
1700
1701/**
1702 * devlink_unregister - Unregister devlink instance
1703 *
1704 * @devlink: devlink
1705 */
1706void devlink_unregister(struct devlink *devlink)
1707{
1708 mutex_lock(&devlink_mutex);
1709 devlink_notify(devlink, DEVLINK_CMD_DEL);
1710 list_del(&devlink->list);
1711 mutex_unlock(&devlink_mutex);
1712}
1713EXPORT_SYMBOL_GPL(devlink_unregister);
1714
1715/**
1716 * devlink_free - Free devlink instance resources
1717 *
1718 * @devlink: devlink
1719 */
1720void devlink_free(struct devlink *devlink)
1721{
1722 kfree(devlink);
1723}
1724EXPORT_SYMBOL_GPL(devlink_free);
1725
1726/**
1727 * devlink_port_register - Register devlink port
1728 *
1729 * @devlink: devlink
1730 * @devlink_port: devlink port
1731 * @port_index
1732 *
1733 * Register devlink port with provided port index. User can use
1734 * any indexing, even hw-related one. devlink_port structure
1735 * is convenient to be embedded inside user driver private structure.
1736 * Note that the caller should take care of zeroing the devlink_port
1737 * structure.
1738 */
1739int devlink_port_register(struct devlink *devlink,
1740 struct devlink_port *devlink_port,
1741 unsigned int port_index)
1742{
1743 mutex_lock(&devlink_port_mutex);
1744 if (devlink_port_index_exists(devlink, port_index)) {
1745 mutex_unlock(&devlink_port_mutex);
1746 return -EEXIST;
1747 }
1748 devlink_port->devlink = devlink;
1749 devlink_port->index = port_index;
1750 devlink_port->registered = true;
1751 list_add_tail(&devlink_port->list, &devlink->port_list);
1752 mutex_unlock(&devlink_port_mutex);
1753 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1754 return 0;
1755}
1756EXPORT_SYMBOL_GPL(devlink_port_register);
1757
1758/**
1759 * devlink_port_unregister - Unregister devlink port
1760 *
1761 * @devlink_port: devlink port
1762 */
1763void devlink_port_unregister(struct devlink_port *devlink_port)
1764{
1765 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
1766 mutex_lock(&devlink_port_mutex);
1767 list_del(&devlink_port->list);
1768 mutex_unlock(&devlink_port_mutex);
1769}
1770EXPORT_SYMBOL_GPL(devlink_port_unregister);
1771
1772static void __devlink_port_type_set(struct devlink_port *devlink_port,
1773 enum devlink_port_type type,
1774 void *type_dev)
1775{
1776 devlink_port->type = type;
1777 devlink_port->type_dev = type_dev;
1778 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1779}
1780
1781/**
1782 * devlink_port_type_eth_set - Set port type to Ethernet
1783 *
1784 * @devlink_port: devlink port
1785 * @netdev: related netdevice
1786 */
1787void devlink_port_type_eth_set(struct devlink_port *devlink_port,
1788 struct net_device *netdev)
1789{
1790 return __devlink_port_type_set(devlink_port,
1791 DEVLINK_PORT_TYPE_ETH, netdev);
1792}
1793EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
1794
1795/**
1796 * devlink_port_type_ib_set - Set port type to InfiniBand
1797 *
1798 * @devlink_port: devlink port
1799 * @ibdev: related IB device
1800 */
1801void devlink_port_type_ib_set(struct devlink_port *devlink_port,
1802 struct ib_device *ibdev)
1803{
1804 return __devlink_port_type_set(devlink_port,
1805 DEVLINK_PORT_TYPE_IB, ibdev);
1806}
1807EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
1808
1809/**
1810 * devlink_port_type_clear - Clear port type
1811 *
1812 * @devlink_port: devlink port
1813 */
1814void devlink_port_type_clear(struct devlink_port *devlink_port)
1815{
1816 return __devlink_port_type_set(devlink_port,
1817 DEVLINK_PORT_TYPE_NOTSET, NULL);
1818}
1819EXPORT_SYMBOL_GPL(devlink_port_type_clear);
1820
1821/**
1822 * devlink_port_split_set - Set port is split
1823 *
1824 * @devlink_port: devlink port
1825 * @split_group: split group - identifies group split port is part of
1826 */
1827void devlink_port_split_set(struct devlink_port *devlink_port,
1828 u32 split_group)
1829{
1830 devlink_port->split = true;
1831 devlink_port->split_group = split_group;
1832 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1833}
1834EXPORT_SYMBOL_GPL(devlink_port_split_set);
1835
1836int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
1837 u32 size, u16 ingress_pools_count,
1838 u16 egress_pools_count, u16 ingress_tc_count,
1839 u16 egress_tc_count)
1840{
1841 struct devlink_sb *devlink_sb;
1842 int err = 0;
1843
1844 mutex_lock(&devlink_mutex);
1845 if (devlink_sb_index_exists(devlink, sb_index)) {
1846 err = -EEXIST;
1847 goto unlock;
1848 }
1849
1850 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
1851 if (!devlink_sb) {
1852 err = -ENOMEM;
1853 goto unlock;
1854 }
1855 devlink_sb->index = sb_index;
1856 devlink_sb->size = size;
1857 devlink_sb->ingress_pools_count = ingress_pools_count;
1858 devlink_sb->egress_pools_count = egress_pools_count;
1859 devlink_sb->ingress_tc_count = ingress_tc_count;
1860 devlink_sb->egress_tc_count = egress_tc_count;
1861 list_add_tail(&devlink_sb->list, &devlink->sb_list);
1862unlock:
1863 mutex_unlock(&devlink_mutex);
1864 return err;
1865}
1866EXPORT_SYMBOL_GPL(devlink_sb_register);
1867
1868void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
1869{
1870 struct devlink_sb *devlink_sb;
1871
1872 mutex_lock(&devlink_mutex);
1873 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
1874 WARN_ON(!devlink_sb);
1875 list_del(&devlink_sb->list);
1876 mutex_unlock(&devlink_mutex);
1877 kfree(devlink_sb);
1878}
1879EXPORT_SYMBOL_GPL(devlink_sb_unregister);
1880
1881static int __init devlink_module_init(void)
1882{
1883 return genl_register_family(&devlink_nl_family);
1884}
1885
1886static void __exit devlink_module_exit(void)
1887{
1888 genl_unregister_family(&devlink_nl_family);
1889}
1890
1891module_init(devlink_module_init);
1892module_exit(devlink_module_exit);
1893
1894MODULE_LICENSE("GPL v2");
1895MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
1896MODULE_DESCRIPTION("Network physical device Netlink interface");
1897MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME);