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aquantia: Remove the build_skb path
[linux-2.6-block.git] / net / core / devlink.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
bfcd3a46
JP		 2/*
3 * net/core/devlink.c - Network physical/parent device Netlink interface
4 *
5 * Heavily inspired by net/wireless/
6 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
7 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
bfcd3a46
JP		 8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <linux/gfp.h>
15#include <linux/device.h>
16#include <linux/list.h>
17#include <linux/netdevice.h>
b8f97554 18#include <linux/spinlock.h>
b587bdaf 19#include <linux/refcount.h>
136bf27f 20#include <linux/workqueue.h>
0f420b6c
IS		 21#include <linux/u64_stats_sync.h>
22#include <linux/timekeeping.h>
bfcd3a46
JP		 23#include <rdma/ib_verbs.h>
24#include <net/netlink.h>
25#include <net/genetlink.h>
26#include <net/rtnetlink.h>
27#include <net/net_namespace.h>
28#include <net/sock.h>
29#include <net/devlink.h>
e5224f0f
JP		 30#define CREATE_TRACE_POINTS
31#include <trace/events/devlink.h>
32
11770091
AS		 33static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
34 {
12bdc5e1 35 .name = "destination mac",
11770091
AS		 36 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
37 .bitwidth = 48,
38 },
39};
40
41struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
42 .name = "ethernet",
43 .id = DEVLINK_DPIPE_HEADER_ETHERNET,
44 .fields = devlink_dpipe_fields_ethernet,
45 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
46 .global = true,
47};
48EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
49
3fb886ec
AS		 50static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
51 {
52 .name = "destination ip",
53 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
54 .bitwidth = 32,
55 },
56};
57
58struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
59 .name = "ipv4",
60 .id = DEVLINK_DPIPE_HEADER_IPV4,
61 .fields = devlink_dpipe_fields_ipv4,
62 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
63 .global = true,
64};
65EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
66
1797f5b3
AS		 67static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
68 {
69 .name = "destination ip",
70 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
71 .bitwidth = 128,
72 },
73};
74
75struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
76 .name = "ipv6",
77 .id = DEVLINK_DPIPE_HEADER_IPV6,
78 .fields = devlink_dpipe_fields_ipv6,
79 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
80 .global = true,
81};
82EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
83
e5224f0f 84EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
57186a5f 85EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
5b88823b 86EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
bfcd3a46 87
a1e8ae90
PP		 88static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
89 [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
90};
91
bfcd3a46
JP		 92static LIST_HEAD(devlink_list);
93
94/* devlink_mutex
95 *
96 * An overall lock guarding every operation coming from userspace.
97 * It also guards devlink devices list and it is taken when
98 * driver registers/unregisters it.
99 */
100static DEFINE_MUTEX(devlink_mutex);
101
471f894f 102struct net *devlink_net(const struct devlink *devlink)
bfcd3a46
JP		 103{
104 return read_pnet(&devlink->_net);
105}
471f894f 106EXPORT_SYMBOL_GPL(devlink_net);
bfcd3a46 107
8273fd84 108static void __devlink_net_set(struct devlink *devlink, struct net *net)
bfcd3a46
JP		 109{
110 write_pnet(&devlink->_net, net);
111}
112
8273fd84
JP		 113void devlink_net_set(struct devlink *devlink, struct net *net)
114{
115 if (WARN_ON(devlink->registered))
116 return;
117 __devlink_net_set(devlink, net);
118}
119EXPORT_SYMBOL_GPL(devlink_net_set);
120
bfcd3a46
JP		 121static struct devlink *devlink_get_from_attrs(struct net *net,
122 struct nlattr **attrs)
123{
124 struct devlink *devlink;
125 char *busname;
126 char *devname;
127
128 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
129 return ERR_PTR(-EINVAL);
130
131 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
132 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
133
dac7c08f
PP		 134 lockdep_assert_held(&devlink_mutex);
135
bfcd3a46
JP		 136 list_for_each_entry(devlink, &devlink_list, list) {
137 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
138 strcmp(dev_name(devlink->dev), devname) == 0 &&
139 net_eq(devlink_net(devlink), net))
140 return devlink;
141 }
142
143 return ERR_PTR(-ENODEV);
144}
145
146static struct devlink *devlink_get_from_info(struct genl_info *info)
147{
148 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
149}
150
151static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
c7282b50 152 unsigned int port_index)
bfcd3a46
JP		 153{
154 struct devlink_port *devlink_port;
155
156 list_for_each_entry(devlink_port, &devlink->port_list, list) {
157 if (devlink_port->index == port_index)
158 return devlink_port;
159 }
160 return NULL;
161}
162
c7282b50
PP		 163static bool devlink_port_index_exists(struct devlink *devlink,
164 unsigned int port_index)
bfcd3a46
JP		 165{
166 return devlink_port_get_by_index(devlink, port_index);
167}
168
169static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
170 struct nlattr **attrs)
171{
172 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
173 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
174 struct devlink_port *devlink_port;
175
176 devlink_port = devlink_port_get_by_index(devlink, port_index);
177 if (!devlink_port)
178 return ERR_PTR(-ENODEV);
179 return devlink_port;
180 }
181 return ERR_PTR(-EINVAL);
182}
183
184static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
185 struct genl_info *info)
186{
187 return devlink_port_get_from_attrs(devlink, info->attrs);
188}
189
bf797471
JP		 190struct devlink_sb {
191 struct list_head list;
192 unsigned int index;
193 u32 size;
194 u16 ingress_pools_count;
195 u16 egress_pools_count;
196 u16 ingress_tc_count;
197 u16 egress_tc_count;
198};
199
200static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
201{
202 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
203}
204
205static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
206 unsigned int sb_index)
207{
208 struct devlink_sb *devlink_sb;
209
210 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
211 if (devlink_sb->index == sb_index)
212 return devlink_sb;
213 }
214 return NULL;
215}
216
217static bool devlink_sb_index_exists(struct devlink *devlink,
218 unsigned int sb_index)
219{
220 return devlink_sb_get_by_index(devlink, sb_index);
221}
222
223static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
224 struct nlattr **attrs)
225{
226 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
227 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
228 struct devlink_sb *devlink_sb;
229
230 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
231 if (!devlink_sb)
232 return ERR_PTR(-ENODEV);
233 return devlink_sb;
234 }
235 return ERR_PTR(-EINVAL);
236}
237
238static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
239 struct genl_info *info)
240{
241 return devlink_sb_get_from_attrs(devlink, info->attrs);
242}
243
244static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
245 struct nlattr **attrs,
246 u16 *p_pool_index)
247{
248 u16 val;
249
250 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
251 return -EINVAL;
252
253 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
254 if (val >= devlink_sb_pool_count(devlink_sb))
255 return -EINVAL;
256 *p_pool_index = val;
257 return 0;
258}
259
260static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
261 struct genl_info *info,
262 u16 *p_pool_index)
263{
264 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
265 p_pool_index);
266}
267
268static int
269devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
270 enum devlink_sb_pool_type *p_pool_type)
271{
272 u8 val;
273
274 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
275 return -EINVAL;
276
277 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
278 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
279 val != DEVLINK_SB_POOL_TYPE_EGRESS)
280 return -EINVAL;
281 *p_pool_type = val;
282 return 0;
283}
284
285static int
286devlink_sb_pool_type_get_from_info(struct genl_info *info,
287 enum devlink_sb_pool_type *p_pool_type)
288{
289 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
290}
291
292static int
293devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
294 enum devlink_sb_threshold_type *p_th_type)
295{
296 u8 val;
297
298 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
299 return -EINVAL;
300
301 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
302 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
303 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
304 return -EINVAL;
305 *p_th_type = val;
306 return 0;
307}
308
309static int
310devlink_sb_th_type_get_from_info(struct genl_info *info,
311 enum devlink_sb_threshold_type *p_th_type)
312{
313 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
314}
315
316static int
317devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
318 struct nlattr **attrs,
319 enum devlink_sb_pool_type pool_type,
320 u16 *p_tc_index)
321{
322 u16 val;
323
324 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
325 return -EINVAL;
326
327 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
328 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
329 val >= devlink_sb->ingress_tc_count)
330 return -EINVAL;
331 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
332 val >= devlink_sb->egress_tc_count)
333 return -EINVAL;
334 *p_tc_index = val;
335 return 0;
336}
337
338static int
339devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
340 struct genl_info *info,
341 enum devlink_sb_pool_type pool_type,
342 u16 *p_tc_index)
343{
344 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
345 pool_type, p_tc_index);
346}
347
b16ebe92
AV		 348struct devlink_region {
349 struct devlink *devlink;
544e7c33 350 struct devlink_port *port;
b16ebe92 351 struct list_head list;
544e7c33
AL		 352 union {
353 const struct devlink_region_ops *ops;
354 const struct devlink_port_region_ops *port_ops;
355 };
b16ebe92
AV		 356 struct list_head snapshot_list;
357 u32 max_snapshots;
358 u32 cur_snapshots;
359 u64 size;
360};
361
d7e52722
AV		 362struct devlink_snapshot {
363 struct list_head list;
364 struct devlink_region *region;
d7e52722
AV		 365 u8 *data;
366 u32 id;
367};
368
b16ebe92
AV		 369static struct devlink_region *
370devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
371{
372 struct devlink_region *region;
373
374 list_for_each_entry(region, &devlink->region_list, list)
e8937681 375 if (!strcmp(region->ops->name, region_name))
b16ebe92
AV		 376 return region;
377
378 return NULL;
379}
380
544e7c33
AL		 381static struct devlink_region *
382devlink_port_region_get_by_name(struct devlink_port *port,
383 const char *region_name)
384{
385 struct devlink_region *region;
386
387 list_for_each_entry(region, &port->region_list, list)
388 if (!strcmp(region->ops->name, region_name))
389 return region;
390
391 return NULL;
392}
393
d7e52722
AV		 394static struct devlink_snapshot *
395devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
396{
397 struct devlink_snapshot *snapshot;
398
399 list_for_each_entry(snapshot, &region->snapshot_list, list)
400 if (snapshot->id == id)
401 return snapshot;
402
403 return NULL;
404}
405
637989b5
PP		 406#define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
407#define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1)
2406e7e5
AS		 408
409/* The per devlink instance lock is taken by default in the pre-doit
410 * operation, yet several commands do not require this. The global
411 * devlink lock is taken and protects from disruption by user-calls.
412 */
637989b5 413#define DEVLINK_NL_FLAG_NO_LOCK BIT(2)
bfcd3a46
JP		 414
415static int devlink_nl_pre_doit(const struct genl_ops *ops,
416 struct sk_buff *skb, struct genl_info *info)
417{
f4f54166 418 struct devlink_port *devlink_port;
bfcd3a46 419 struct devlink *devlink;
2406e7e5 420 int err;
bfcd3a46
JP		 421
422 mutex_lock(&devlink_mutex);
423 devlink = devlink_get_from_info(info);
424 if (IS_ERR(devlink)) {
425 mutex_unlock(&devlink_mutex);
426 return PTR_ERR(devlink);
427 }
2406e7e5
AS		 428 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
429 mutex_lock(&devlink->lock);
637989b5
PP		 430 info->user_ptr[0] = devlink;
431 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
bfcd3a46
JP		 432 devlink_port = devlink_port_get_from_info(devlink, info);
433 if (IS_ERR(devlink_port)) {
2406e7e5
AS		 434 err = PTR_ERR(devlink_port);
435 goto unlock;
bfcd3a46 436 }
637989b5 437 info->user_ptr[1] = devlink_port;
f4f54166 438 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT) {
f4f54166
VT		 439 devlink_port = devlink_port_get_from_info(devlink, info);
440 if (!IS_ERR(devlink_port))
441 info->user_ptr[1] = devlink_port;
bfcd3a46
JP		 442 }
443 return 0;
2406e7e5
AS		 444
445unlock:
446 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
447 mutex_unlock(&devlink->lock);
448 mutex_unlock(&devlink_mutex);
449 return err;
bfcd3a46
JP		 450}
451
452static void devlink_nl_post_doit(const struct genl_ops *ops,
453 struct sk_buff *skb, struct genl_info *info)
454{
2406e7e5
AS		 455 struct devlink *devlink;
456
637989b5
PP		 457 devlink = info->user_ptr[0];
458 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
2406e7e5 459 mutex_unlock(&devlink->lock);
bfcd3a46
JP		 460 mutex_unlock(&devlink_mutex);
461}
462
489111e5 463static struct genl_family devlink_nl_family;
bfcd3a46
JP		 464
465enum devlink_multicast_groups {
466 DEVLINK_MCGRP_CONFIG,
467};
468
469static const struct genl_multicast_group devlink_nl_mcgrps[] = {
470 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
471};
472
473static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
474{
475 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
476 return -EMSGSIZE;
477 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
478 return -EMSGSIZE;
479 return 0;
480}
481
dc64cc7c
MS		 482struct devlink_reload_combination {
483 enum devlink_reload_action action;
484 enum devlink_reload_limit limit;
485};
486
487static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
488 {
489 /* can't reinitialize driver with no down time */
490 .action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
491 .limit = DEVLINK_RELOAD_LIMIT_NO_RESET,
492 },
493};
494
495static bool
496devlink_reload_combination_is_invalid(enum devlink_reload_action action,
497 enum devlink_reload_limit limit)
498{
499 int i;
500
501 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)
502 if (devlink_reload_invalid_combinations[i].action == action &&
503 devlink_reload_invalid_combinations[i].limit == limit)
504 return true;
505 return false;
506}
507
ccdf0721
MS		 508static bool
509devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
510{
511 return test_bit(action, &devlink->ops->reload_actions);
512}
513
dc64cc7c
MS		 514static bool
515devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit)
516{
517 return test_bit(limit, &devlink->ops->reload_limits);
518}
519
a254c264
MS		 520static int devlink_reload_stat_put(struct sk_buff *msg, enum devlink_reload_action action,
521 enum devlink_reload_limit limit, u32 value)
522{
523 struct nlattr *reload_stats_entry;
524
525 reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY);
526 if (!reload_stats_entry)
527 return -EMSGSIZE;
528
529 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, action) ||
530 nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) ||
531 nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value))
532 goto nla_put_failure;
533 nla_nest_end(msg, reload_stats_entry);
534 return 0;
535
536nla_put_failure:
537 nla_nest_cancel(msg, reload_stats_entry);
538 return -EMSGSIZE;
539}
540
77069ba2 541static int devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink, bool is_remote)
a254c264
MS		 542{
543 struct nlattr *reload_stats_attr;
544 int i, j, stat_idx;
545 u32 value;
546
77069ba2
MS		 547 if (!is_remote)
548 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS);
549 else
550 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_REMOTE_RELOAD_STATS);
a254c264
MS		 551
552 if (!reload_stats_attr)
553 return -EMSGSIZE;
554
555 for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) {
77069ba2
MS		 556 /* Remote stats are shown even if not locally supported. Stats
557 * of actions with unspecified limit are shown though drivers
558 * don't need to register unspecified limit.
559 */
560 if (!is_remote && j != DEVLINK_RELOAD_LIMIT_UNSPEC &&
a254c264
MS		 561 !devlink_reload_limit_is_supported(devlink, j))
562 continue;
563 for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) {
77069ba2
MS		 564 if ((!is_remote && !devlink_reload_action_is_supported(devlink, i)) ||
565 i == DEVLINK_RELOAD_ACTION_UNSPEC ||
a254c264
MS		 566 devlink_reload_combination_is_invalid(i, j))
567 continue;
568
569 stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i;
77069ba2
MS		 570 if (!is_remote)
571 value = devlink->stats.reload_stats[stat_idx];
572 else
573 value = devlink->stats.remote_reload_stats[stat_idx];
a254c264
MS		 574 if (devlink_reload_stat_put(msg, i, j, value))
575 goto nla_put_failure;
576 }
577 }
578 nla_nest_end(msg, reload_stats_attr);
579 return 0;
580
581nla_put_failure:
582 nla_nest_cancel(msg, reload_stats_attr);
583 return -EMSGSIZE;
584}
585
bfcd3a46
JP		 586static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
587 enum devlink_command cmd, u32 portid,
588 u32 seq, int flags)
589{
a254c264 590 struct nlattr *dev_stats;
bfcd3a46
JP		 591 void *hdr;
592
593 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
594 if (!hdr)
595 return -EMSGSIZE;
596
597 if (devlink_nl_put_handle(msg, devlink))
598 goto nla_put_failure;
2670ac26
JP		 599 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
600 goto nla_put_failure;
bfcd3a46 601
a254c264
MS		 602 dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS);
603 if (!dev_stats)
604 goto nla_put_failure;
605
77069ba2
MS		 606 if (devlink_reload_stats_put(msg, devlink, false))
607 goto dev_stats_nest_cancel;
608 if (devlink_reload_stats_put(msg, devlink, true))
a254c264
MS		 609 goto dev_stats_nest_cancel;
610
611 nla_nest_end(msg, dev_stats);
bfcd3a46
JP		 612 genlmsg_end(msg, hdr);
613 return 0;
614
a254c264
MS		 615dev_stats_nest_cancel:
616 nla_nest_cancel(msg, dev_stats);
bfcd3a46
JP		 617nla_put_failure:
618 genlmsg_cancel(msg, hdr);
619 return -EMSGSIZE;
620}
621
622static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
623{
624 struct sk_buff *msg;
625 int err;
626
627 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
628
629 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
630 if (!msg)
631 return;
632
633 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
634 if (err) {
635 nlmsg_free(msg);
636 return;
637 }
638
639 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
640 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
641}
642
b9ffcbaf
JP		 643static int devlink_nl_port_attrs_put(struct sk_buff *msg,
644 struct devlink_port *devlink_port)
645{
646 struct devlink_port_attrs *attrs = &devlink_port->attrs;
647
10a429ba 648 if (!devlink_port->attrs_set)
b9ffcbaf 649 return 0;
a21cf0a8
DR		 650 if (attrs->lanes) {
651 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
652 return -EMSGSIZE;
653 }
a0f49b54
DR		 654 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
655 return -EMSGSIZE;
5ec1380a
JP		 656 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
657 return -EMSGSIZE;
58b6be41
PP		 658 switch (devlink_port->attrs.flavour) {
659 case DEVLINK_PORT_FLAVOUR_PCI_PF:
3a2d9588
PP		 660 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
661 attrs->pci_pf.controller) ||
662 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
98fd2d65 663 return -EMSGSIZE;
05b595e9
PP		 664 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
665 return -EMSGSIZE;
58b6be41
PP		 666 break;
667 case DEVLINK_PORT_FLAVOUR_PCI_VF:
3a2d9588
PP		 668 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
669 attrs->pci_vf.controller) ||
670 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) ||
671 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf))
e41b6bf3 672 return -EMSGSIZE;
05b595e9
PP		 673 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
674 return -EMSGSIZE;
58b6be41
PP		 675 break;
676 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
677 case DEVLINK_PORT_FLAVOUR_CPU:
678 case DEVLINK_PORT_FLAVOUR_DSA:
acf1ee44 679 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
58b6be41
PP		 680 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
681 attrs->phys.port_number))
682 return -EMSGSIZE;
683 if (!attrs->split)
684 return 0;
685 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
686 attrs->phys.port_number))
687 return -EMSGSIZE;
688 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
689 attrs->phys.split_subport_number))
690 return -EMSGSIZE;
691 break;
692 default:
693 break;
98fd2d65 694 }
b9ffcbaf
JP		 695 return 0;
696}
697
2a916ecc
PP		 698static int
699devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
700 struct netlink_ext_ack *extack)
701{
702 struct devlink *devlink = port->devlink;
703 const struct devlink_ops *ops;
704 struct nlattr *function_attr;
705 bool empty_nest = true;
706 int err = 0;
707
708 function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
709 if (!function_attr)
710 return -EMSGSIZE;
711
712 ops = devlink->ops;
713 if (ops->port_function_hw_addr_get) {
29cb9868 714 int hw_addr_len;
2a916ecc
PP		 715 u8 hw_addr[MAX_ADDR_LEN];
716
717 err = ops->port_function_hw_addr_get(devlink, port, hw_addr, &hw_addr_len, extack);
718 if (err == -EOPNOTSUPP) {
719 /* Port function attributes are optional for a port. If port doesn't
720 * support function attribute, returning -EOPNOTSUPP is not an error.
721 */
722 err = 0;
723 goto out;
724 } else if (err) {
725 goto out;
726 }
727 err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
728 if (err)
729 goto out;
730 empty_nest = false;
731 }
732
733out:
734 if (err || empty_nest)
735 nla_nest_cancel(msg, function_attr);
736 else
737 nla_nest_end(msg, function_attr);
738 return err;
739}
740
bfcd3a46
JP		 741static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
742 struct devlink_port *devlink_port,
743 enum devlink_command cmd, u32 portid,
a829eb0d
PP		 744 u32 seq, int flags,
745 struct netlink_ext_ack *extack)
bfcd3a46
JP		 746{
747 void *hdr;
748
749 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
750 if (!hdr)
751 return -EMSGSIZE;
752
753 if (devlink_nl_put_handle(msg, devlink))
754 goto nla_put_failure;
755 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
756 goto nla_put_failure;
b8f97554 757
0f420b6c 758 spin_lock_bh(&devlink_port->type_lock);
bfcd3a46 759 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
b8f97554 760 goto nla_put_failure_type_locked;
bfcd3a46
JP		 761 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
762 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
763 devlink_port->desired_type))
b8f97554 764 goto nla_put_failure_type_locked;
bfcd3a46
JP		 765 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
766 struct net_device *netdev = devlink_port->type_dev;
767
768 if (netdev &&
769 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
770 netdev->ifindex) ||
771 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
772 netdev->name)))
b8f97554 773 goto nla_put_failure_type_locked;
bfcd3a46
JP		 774 }
775 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
776 struct ib_device *ibdev = devlink_port->type_dev;
777
778 if (ibdev &&
779 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
780 ibdev->name))
b8f97554 781 goto nla_put_failure_type_locked;
bfcd3a46 782 }
0f420b6c 783 spin_unlock_bh(&devlink_port->type_lock);
b9ffcbaf 784 if (devlink_nl_port_attrs_put(msg, devlink_port))
bfcd3a46 785 goto nla_put_failure;
2a916ecc
PP		 786 if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
787 goto nla_put_failure;
bfcd3a46
JP		 788
789 genlmsg_end(msg, hdr);
790 return 0;
791
b8f97554 792nla_put_failure_type_locked:
0f420b6c 793 spin_unlock_bh(&devlink_port->type_lock);
bfcd3a46
JP		 794nla_put_failure:
795 genlmsg_cancel(msg, hdr);
796 return -EMSGSIZE;
797}
798
799static void devlink_port_notify(struct devlink_port *devlink_port,
800 enum devlink_command cmd)
801{
802 struct devlink *devlink = devlink_port->devlink;
803 struct sk_buff *msg;
804 int err;
805
806 if (!devlink_port->registered)
807 return;
808
809 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
810
811 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
812 if (!msg)
813 return;
814
a829eb0d
PP		 815 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0,
816 NULL);
bfcd3a46
JP		 817 if (err) {
818 nlmsg_free(msg);
819 return;
820 }
821
822 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
823 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
824}
825
826static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
827{
828 struct devlink *devlink = info->user_ptr[0];
829 struct sk_buff *msg;
830 int err;
831
832 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
833 if (!msg)
834 return -ENOMEM;
835
836 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
837 info->snd_portid, info->snd_seq, 0);
838 if (err) {
839 nlmsg_free(msg);
840 return err;
841 }
842
843 return genlmsg_reply(msg, info);
844}
845
846static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
847 struct netlink_callback *cb)
848{
849 struct devlink *devlink;
850 int start = cb->args[0];
851 int idx = 0;
852 int err;
853
854 mutex_lock(&devlink_mutex);
855 list_for_each_entry(devlink, &devlink_list, list) {
856 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
857 continue;
858 if (idx < start) {
859 idx++;
860 continue;
861 }
862 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
863 NETLINK_CB(cb->skb).portid,
864 cb->nlh->nlmsg_seq, NLM_F_MULTI);
865 if (err)
866 goto out;
867 idx++;
868 }
869out:
870 mutex_unlock(&devlink_mutex);
871
872 cb->args[0] = idx;
873 return msg->len;
874}
875
876static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
877 struct genl_info *info)
878{
637989b5 879 struct devlink_port *devlink_port = info->user_ptr[1];
1fc2257e 880 struct devlink *devlink = devlink_port->devlink;
bfcd3a46
JP		 881 struct sk_buff *msg;
882 int err;
883
884 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
885 if (!msg)
886 return -ENOMEM;
887
888 err = devlink_nl_port_fill(msg, devlink, devlink_port,
889 DEVLINK_CMD_PORT_NEW,
a829eb0d
PP		 890 info->snd_portid, info->snd_seq, 0,
891 info->extack);
bfcd3a46
JP		 892 if (err) {
893 nlmsg_free(msg);
894 return err;
895 }
896
897 return genlmsg_reply(msg, info);
898}
899
900static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
901 struct netlink_callback *cb)
902{
903 struct devlink *devlink;
904 struct devlink_port *devlink_port;
905 int start = cb->args[0];
906 int idx = 0;
907 int err;
908
909 mutex_lock(&devlink_mutex);
bfcd3a46
JP		 910 list_for_each_entry(devlink, &devlink_list, list) {
911 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
912 continue;
2406e7e5 913 mutex_lock(&devlink->lock);
bfcd3a46
JP		 914 list_for_each_entry(devlink_port, &devlink->port_list, list) {
915 if (idx < start) {
916 idx++;
917 continue;
918 }
919 err = devlink_nl_port_fill(msg, devlink, devlink_port,
920 DEVLINK_CMD_NEW,
921 NETLINK_CB(cb->skb).portid,
922 cb->nlh->nlmsg_seq,
a829eb0d
PP		 923 NLM_F_MULTI,
924 cb->extack);
2406e7e5
AS		 925 if (err) {
926 mutex_unlock(&devlink->lock);
bfcd3a46 927 goto out;
2406e7e5 928 }
bfcd3a46
JP		 929 idx++;
930 }
2406e7e5 931 mutex_unlock(&devlink->lock);
bfcd3a46
JP		 932 }
933out:
bfcd3a46
JP		 934 mutex_unlock(&devlink_mutex);
935
936 cb->args[0] = idx;
937 return msg->len;
938}
939
940static int devlink_port_type_set(struct devlink *devlink,
941 struct devlink_port *devlink_port,
942 enum devlink_port_type port_type)
943
944{
945 int err;
946
be6fe1d8 947 if (devlink->ops->port_type_set) {
6edf1017
ER		 948 if (port_type == devlink_port->type)
949 return 0;
bfcd3a46
JP		 950 err = devlink->ops->port_type_set(devlink_port, port_type);
951 if (err)
952 return err;
953 devlink_port->desired_type = port_type;
954 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
955 return 0;
956 }
957 return -EOPNOTSUPP;
958}
959
a1e8ae90
PP		 960static int
961devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *port,
962 const struct nlattr *attr, struct netlink_ext_ack *extack)
963{
964 const struct devlink_ops *ops;
965 const u8 *hw_addr;
966 int hw_addr_len;
967 int err;
968
969 hw_addr = nla_data(attr);
970 hw_addr_len = nla_len(attr);
971 if (hw_addr_len > MAX_ADDR_LEN) {
972 NL_SET_ERR_MSG_MOD(extack, "Port function hardware address too long");
973 return -EINVAL;
974 }
975 if (port->type == DEVLINK_PORT_TYPE_ETH) {
976 if (hw_addr_len != ETH_ALEN) {
977 NL_SET_ERR_MSG_MOD(extack, "Address must be 6 bytes for Ethernet device");
978 return -EINVAL;
979 }
980 if (!is_unicast_ether_addr(hw_addr)) {
981 NL_SET_ERR_MSG_MOD(extack, "Non-unicast hardware address unsupported");
982 return -EINVAL;
983 }
984 }
985
986 ops = devlink->ops;
987 if (!ops->port_function_hw_addr_set) {
988 NL_SET_ERR_MSG_MOD(extack, "Port doesn't support function attributes");
989 return -EOPNOTSUPP;
990 }
991
992 err = ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack);
993 if (err)
994 return err;
995
996 devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
997 return 0;
998}
999
1000static int
1001devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
1002 const struct nlattr *attr, struct netlink_ext_ack *extack)
1003{
1004 struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
1005 int err;
1006
1007 err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
1008 devlink_function_nl_policy, extack);
1009 if (err < 0) {
1010 NL_SET_ERR_MSG_MOD(extack, "Fail to parse port function attributes");
1011 return err;
1012 }
1013
1014 attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
1015 if (attr)
1016 err = devlink_port_function_hw_addr_set(devlink, port, attr, extack);
1017
1018 return err;
1019}
1020
bfcd3a46
JP		 1021static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
1022 struct genl_info *info)
1023{
637989b5 1024 struct devlink_port *devlink_port = info->user_ptr[1];
1fc2257e 1025 struct devlink *devlink = devlink_port->devlink;
bfcd3a46
JP		 1026 int err;
1027
1028 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
1029 enum devlink_port_type port_type;
1030
1031 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
1032 err = devlink_port_type_set(devlink, devlink_port, port_type);
1033 if (err)
1034 return err;
1035 }
a1e8ae90
PP		 1036
1037 if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
1038 struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
1039 struct netlink_ext_ack *extack = info->extack;
1040
1041 err = devlink_port_function_set(devlink, devlink_port, attr, extack);
1042 if (err)
1043 return err;
1044 }
1045
bfcd3a46
JP		 1046 return 0;
1047}
1048
ac0fc8a1
DA		 1049static int devlink_port_split(struct devlink *devlink, u32 port_index,
1050 u32 count, struct netlink_ext_ack *extack)
bfcd3a46
JP		 1051
1052{
be6fe1d8 1053 if (devlink->ops->port_split)
ac0fc8a1
DA		 1054 return devlink->ops->port_split(devlink, port_index, count,
1055 extack);
bfcd3a46
JP		 1056 return -EOPNOTSUPP;
1057}
1058
1059static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
1060 struct genl_info *info)
1061{
1062 struct devlink *devlink = info->user_ptr[0];
82901ad1 1063 struct devlink_port *devlink_port;
bfcd3a46
JP		 1064 u32 port_index;
1065 u32 count;
1066
1067 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
1068 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
1069 return -EINVAL;
1070
82901ad1 1071 devlink_port = devlink_port_get_from_info(devlink, info);
bfcd3a46
JP		 1072 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
1073 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
82901ad1
DR		 1074
1075 if (IS_ERR(devlink_port))
1076 return -EINVAL;
1077
1078 if (!devlink_port->attrs.splittable) {
1079 /* Split ports cannot be split. */
1080 if (devlink_port->attrs.split)
1081 NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split further");
1082 else
1083 NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split");
1084 return -EINVAL;
1085 }
1086
1087 if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
1088 NL_SET_ERR_MSG_MOD(info->extack, "Invalid split count");
1089 return -EINVAL;
1090 }
1091
ac0fc8a1 1092 return devlink_port_split(devlink, port_index, count, info->extack);
bfcd3a46
JP		 1093}
1094
ac0fc8a1
DA		 1095static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
1096 struct netlink_ext_ack *extack)
bfcd3a46
JP		 1097
1098{
be6fe1d8 1099 if (devlink->ops->port_unsplit)
ac0fc8a1 1100 return devlink->ops->port_unsplit(devlink, port_index, extack);
bfcd3a46
JP		 1101 return -EOPNOTSUPP;
1102}
1103
1104static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
1105 struct genl_info *info)
1106{
1107 struct devlink *devlink = info->user_ptr[0];
1108 u32 port_index;
1109
1110 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
1111 return -EINVAL;
1112
1113 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
ac0fc8a1 1114 return devlink_port_unsplit(devlink, port_index, info->extack);
bfcd3a46
JP		 1115}
1116
bf797471
JP		 1117static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
1118 struct devlink_sb *devlink_sb,
1119 enum devlink_command cmd, u32 portid,
1120 u32 seq, int flags)
1121{
1122 void *hdr;
1123
1124 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1125 if (!hdr)
1126 return -EMSGSIZE;
1127
1128 if (devlink_nl_put_handle(msg, devlink))
1129 goto nla_put_failure;
1130 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1131 goto nla_put_failure;
1132 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
1133 goto nla_put_failure;
1134 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
1135 devlink_sb->ingress_pools_count))
1136 goto nla_put_failure;
1137 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
1138 devlink_sb->egress_pools_count))
1139 goto nla_put_failure;
1140 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
1141 devlink_sb->ingress_tc_count))
1142 goto nla_put_failure;
1143 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
1144 devlink_sb->egress_tc_count))
1145 goto nla_put_failure;
1146
1147 genlmsg_end(msg, hdr);
1148 return 0;
1149
1150nla_put_failure:
1151 genlmsg_cancel(msg, hdr);
1152 return -EMSGSIZE;
1153}
1154
1155static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
1156 struct genl_info *info)
1157{
1158 struct devlink *devlink = info->user_ptr[0];
637989b5 1159 struct devlink_sb *devlink_sb;
bf797471
JP		 1160 struct sk_buff *msg;
1161 int err;
1162
637989b5
PP		 1163 devlink_sb = devlink_sb_get_from_info(devlink, info);
1164 if (IS_ERR(devlink_sb))
1165 return PTR_ERR(devlink_sb);
1166
bf797471
JP		 1167 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1168 if (!msg)
1169 return -ENOMEM;
1170
1171 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
1172 DEVLINK_CMD_SB_NEW,
1173 info->snd_portid, info->snd_seq, 0);
1174 if (err) {
1175 nlmsg_free(msg);
1176 return err;
1177 }
1178
1179 return genlmsg_reply(msg, info);
1180}
1181
1182static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
1183 struct netlink_callback *cb)
1184{
1185 struct devlink *devlink;
1186 struct devlink_sb *devlink_sb;
1187 int start = cb->args[0];
1188 int idx = 0;
1189 int err;
1190
1191 mutex_lock(&devlink_mutex);
1192 list_for_each_entry(devlink, &devlink_list, list) {
1193 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
1194 continue;
2406e7e5 1195 mutex_lock(&devlink->lock);
bf797471
JP		 1196 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1197 if (idx < start) {
1198 idx++;
1199 continue;
1200 }
1201 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
1202 DEVLINK_CMD_SB_NEW,
1203 NETLINK_CB(cb->skb).portid,
1204 cb->nlh->nlmsg_seq,
1205 NLM_F_MULTI);
2406e7e5
AS		 1206 if (err) {
1207 mutex_unlock(&devlink->lock);
bf797471 1208 goto out;
2406e7e5 1209 }
bf797471
JP		 1210 idx++;
1211 }
2406e7e5 1212 mutex_unlock(&devlink->lock);
bf797471
JP		 1213 }
1214out:
1215 mutex_unlock(&devlink_mutex);
1216
1217 cb->args[0] = idx;
1218 return msg->len;
1219}
1220
1221static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
1222 struct devlink_sb *devlink_sb,
1223 u16 pool_index, enum devlink_command cmd,
1224 u32 portid, u32 seq, int flags)
1225{
1226 struct devlink_sb_pool_info pool_info;
1227 void *hdr;
1228 int err;
1229
1230 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
1231 pool_index, &pool_info);
1232 if (err)
1233 return err;
1234
1235 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1236 if (!hdr)
1237 return -EMSGSIZE;
1238
1239 if (devlink_nl_put_handle(msg, devlink))
1240 goto nla_put_failure;
1241 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1242 goto nla_put_failure;
1243 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1244 goto nla_put_failure;
1245 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
1246 goto nla_put_failure;
1247 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
1248 goto nla_put_failure;
1249 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
1250 pool_info.threshold_type))
1251 goto nla_put_failure;
bff5731d
JK		 1252 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
1253 pool_info.cell_size))
1254 goto nla_put_failure;
bf797471
JP		 1255
1256 genlmsg_end(msg, hdr);
1257 return 0;
1258
1259nla_put_failure:
1260 genlmsg_cancel(msg, hdr);
1261 return -EMSGSIZE;
1262}
1263
1264static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
1265 struct genl_info *info)
1266{
1267 struct devlink *devlink = info->user_ptr[0];
637989b5 1268 struct devlink_sb *devlink_sb;
bf797471
JP		 1269 struct sk_buff *msg;
1270 u16 pool_index;
1271 int err;
1272
637989b5
PP		 1273 devlink_sb = devlink_sb_get_from_info(devlink, info);
1274 if (IS_ERR(devlink_sb))
1275 return PTR_ERR(devlink_sb);
1276
bf797471
JP		 1277 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1278 &pool_index);
1279 if (err)
1280 return err;
1281
be6fe1d8 1282 if (!devlink->ops->sb_pool_get)
bf797471
JP		 1283 return -EOPNOTSUPP;
1284
1285 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1286 if (!msg)
1287 return -ENOMEM;
1288
1289 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
1290 DEVLINK_CMD_SB_POOL_NEW,
1291 info->snd_portid, info->snd_seq, 0);
1292 if (err) {
1293 nlmsg_free(msg);
1294 return err;
1295 }
1296
1297 return genlmsg_reply(msg, info);
1298}
1299
1300static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1301 struct devlink *devlink,
1302 struct devlink_sb *devlink_sb,
1303 u32 portid, u32 seq)
1304{
1305 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1306 u16 pool_index;
1307 int err;
1308
1309 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1310 if (*p_idx < start) {
1311 (*p_idx)++;
1312 continue;
1313 }
1314 err = devlink_nl_sb_pool_fill(msg, devlink,
1315 devlink_sb,
1316 pool_index,
1317 DEVLINK_CMD_SB_POOL_NEW,
1318 portid, seq, NLM_F_MULTI);
1319 if (err)
1320 return err;
1321 (*p_idx)++;
1322 }
1323 return 0;
1324}
1325
1326static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1327 struct netlink_callback *cb)
1328{
1329 struct devlink *devlink;
1330 struct devlink_sb *devlink_sb;
1331 int start = cb->args[0];
1332 int idx = 0;
c62c2cfb 1333 int err = 0;
bf797471
JP		 1334
1335 mutex_lock(&devlink_mutex);
1336 list_for_each_entry(devlink, &devlink_list, list) {
1337 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
be6fe1d8 1338 !devlink->ops->sb_pool_get)
bf797471 1339 continue;
2406e7e5 1340 mutex_lock(&devlink->lock);
bf797471
JP		 1341 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1342 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1343 devlink_sb,
1344 NETLINK_CB(cb->skb).portid,
1345 cb->nlh->nlmsg_seq);
82274d07
JK		 1346 if (err == -EOPNOTSUPP) {
1347 err = 0;
1348 } else if (err) {
2406e7e5 1349 mutex_unlock(&devlink->lock);
bf797471 1350 goto out;
2406e7e5 1351 }
bf797471 1352 }
2406e7e5 1353 mutex_unlock(&devlink->lock);
bf797471
JP		 1354 }
1355out:
1356 mutex_unlock(&devlink_mutex);
1357
c62c2cfb
JP		 1358 if (err != -EMSGSIZE)
1359 return err;
1360
bf797471
JP		 1361 cb->args[0] = idx;
1362 return msg->len;
1363}
1364
1365static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1366 u16 pool_index, u32 size,
f2ad1a52
IS		 1367 enum devlink_sb_threshold_type threshold_type,
1368 struct netlink_ext_ack *extack)
bf797471
JP		 1369
1370{
1371 const struct devlink_ops *ops = devlink->ops;
1372
be6fe1d8 1373 if (ops->sb_pool_set)
bf797471 1374 return ops->sb_pool_set(devlink, sb_index, pool_index,
f2ad1a52 1375 size, threshold_type, extack);
bf797471
JP		 1376 return -EOPNOTSUPP;
1377}
1378
1379static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1380 struct genl_info *info)
1381{
1382 struct devlink *devlink = info->user_ptr[0];
bf797471 1383 enum devlink_sb_threshold_type threshold_type;
637989b5 1384 struct devlink_sb *devlink_sb;
bf797471
JP		 1385 u16 pool_index;
1386 u32 size;
1387 int err;
1388
637989b5
PP		 1389 devlink_sb = devlink_sb_get_from_info(devlink, info);
1390 if (IS_ERR(devlink_sb))
1391 return PTR_ERR(devlink_sb);
1392
bf797471
JP		 1393 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1394 &pool_index);
1395 if (err)
1396 return err;
1397
1398 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1399 if (err)
1400 return err;
1401
1402 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1403 return -EINVAL;
1404
1405 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1406 return devlink_sb_pool_set(devlink, devlink_sb->index,
f2ad1a52
IS		 1407 pool_index, size, threshold_type,
1408 info->extack);
bf797471
JP		 1409}
1410
1411static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1412 struct devlink *devlink,
1413 struct devlink_port *devlink_port,
1414 struct devlink_sb *devlink_sb,
1415 u16 pool_index,
1416 enum devlink_command cmd,
1417 u32 portid, u32 seq, int flags)
1418{
df38dafd 1419 const struct devlink_ops *ops = devlink->ops;
bf797471
JP		 1420 u32 threshold;
1421 void *hdr;
1422 int err;
1423
df38dafd
JP		 1424 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1425 pool_index, &threshold);
bf797471
JP		 1426 if (err)
1427 return err;
1428
1429 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1430 if (!hdr)
1431 return -EMSGSIZE;
1432
1433 if (devlink_nl_put_handle(msg, devlink))
1434 goto nla_put_failure;
1435 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1436 goto nla_put_failure;
1437 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1438 goto nla_put_failure;
1439 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1440 goto nla_put_failure;
1441 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1442 goto nla_put_failure;
1443
df38dafd
JP		 1444 if (ops->sb_occ_port_pool_get) {
1445 u32 cur;
1446 u32 max;
1447
1448 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1449 pool_index, &cur, &max);
1450 if (err && err != -EOPNOTSUPP)
849920c7 1451 goto sb_occ_get_failure;
df38dafd
JP		 1452 if (!err) {
1453 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1454 goto nla_put_failure;
1455 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1456 goto nla_put_failure;
1457 }
1458 }
1459
bf797471
JP		 1460 genlmsg_end(msg, hdr);
1461 return 0;
1462
1463nla_put_failure:
849920c7
WH		 1464 err = -EMSGSIZE;
1465sb_occ_get_failure:
bf797471 1466 genlmsg_cancel(msg, hdr);
849920c7 1467 return err;
bf797471
JP		 1468}
1469
1470static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1471 struct genl_info *info)
1472{
637989b5 1473 struct devlink_port *devlink_port = info->user_ptr[1];
bf797471 1474 struct devlink *devlink = devlink_port->devlink;
637989b5 1475 struct devlink_sb *devlink_sb;
bf797471
JP		 1476 struct sk_buff *msg;
1477 u16 pool_index;
1478 int err;
1479
637989b5
PP		 1480 devlink_sb = devlink_sb_get_from_info(devlink, info);
1481 if (IS_ERR(devlink_sb))
1482 return PTR_ERR(devlink_sb);
1483
bf797471
JP		 1484 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1485 &pool_index);
1486 if (err)
1487 return err;
1488
be6fe1d8 1489 if (!devlink->ops->sb_port_pool_get)
bf797471
JP		 1490 return -EOPNOTSUPP;
1491
1492 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1493 if (!msg)
1494 return -ENOMEM;
1495
1496 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1497 devlink_sb, pool_index,
1498 DEVLINK_CMD_SB_PORT_POOL_NEW,
1499 info->snd_portid, info->snd_seq, 0);
1500 if (err) {
1501 nlmsg_free(msg);
1502 return err;
1503 }
1504
1505 return genlmsg_reply(msg, info);
1506}
1507
1508static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1509 struct devlink *devlink,
1510 struct devlink_sb *devlink_sb,
1511 u32 portid, u32 seq)
1512{
1513 struct devlink_port *devlink_port;
1514 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1515 u16 pool_index;
1516 int err;
1517
1518 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1519 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1520 if (*p_idx < start) {
1521 (*p_idx)++;
1522 continue;
1523 }
1524 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1525 devlink_port,
1526 devlink_sb,
1527 pool_index,
1528 DEVLINK_CMD_SB_PORT_POOL_NEW,
1529 portid, seq,
1530 NLM_F_MULTI);
1531 if (err)
1532 return err;
1533 (*p_idx)++;
1534 }
1535 }
1536 return 0;
1537}
1538
1539static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1540 struct netlink_callback *cb)
1541{
1542 struct devlink *devlink;
1543 struct devlink_sb *devlink_sb;
1544 int start = cb->args[0];
1545 int idx = 0;
c62c2cfb 1546 int err = 0;
bf797471
JP		 1547
1548 mutex_lock(&devlink_mutex);
bf797471
JP		 1549 list_for_each_entry(devlink, &devlink_list, list) {
1550 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
be6fe1d8 1551 !devlink->ops->sb_port_pool_get)
bf797471 1552 continue;
2406e7e5 1553 mutex_lock(&devlink->lock);
bf797471
JP		 1554 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1555 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1556 devlink, devlink_sb,
1557 NETLINK_CB(cb->skb).portid,
1558 cb->nlh->nlmsg_seq);
82274d07
JK		 1559 if (err == -EOPNOTSUPP) {
1560 err = 0;
1561 } else if (err) {
2406e7e5 1562 mutex_unlock(&devlink->lock);
bf797471 1563 goto out;
2406e7e5 1564 }
bf797471 1565 }
2406e7e5 1566 mutex_unlock(&devlink->lock);
bf797471
JP		 1567 }
1568out:
bf797471
JP		 1569 mutex_unlock(&devlink_mutex);
1570
c62c2cfb
JP		 1571 if (err != -EMSGSIZE)
1572 return err;
1573
bf797471
JP		 1574 cb->args[0] = idx;
1575 return msg->len;
1576}
1577
1578static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1579 unsigned int sb_index, u16 pool_index,
f2ad1a52
IS		 1580 u32 threshold,
1581 struct netlink_ext_ack *extack)
bf797471
JP		 1582
1583{
1584 const struct devlink_ops *ops = devlink_port->devlink->ops;
1585
be6fe1d8 1586 if (ops->sb_port_pool_set)
bf797471 1587 return ops->sb_port_pool_set(devlink_port, sb_index,
f2ad1a52 1588 pool_index, threshold, extack);
bf797471
JP		 1589 return -EOPNOTSUPP;
1590}
1591
1592static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1593 struct genl_info *info)
1594{
637989b5
PP		 1595 struct devlink_port *devlink_port = info->user_ptr[1];
1596 struct devlink *devlink = info->user_ptr[0];
1597 struct devlink_sb *devlink_sb;
bf797471
JP		 1598 u16 pool_index;
1599 u32 threshold;
1600 int err;
1601
637989b5
PP		 1602 devlink_sb = devlink_sb_get_from_info(devlink, info);
1603 if (IS_ERR(devlink_sb))
1604 return PTR_ERR(devlink_sb);
1605
bf797471
JP		 1606 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1607 &pool_index);
1608 if (err)
1609 return err;
1610
1611 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1612 return -EINVAL;
1613
1614 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1615 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
f2ad1a52 1616 pool_index, threshold, info->extack);
bf797471
JP		 1617}
1618
1619static int
1620devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1621 struct devlink_port *devlink_port,
1622 struct devlink_sb *devlink_sb, u16 tc_index,
1623 enum devlink_sb_pool_type pool_type,
1624 enum devlink_command cmd,
1625 u32 portid, u32 seq, int flags)
1626{
df38dafd 1627 const struct devlink_ops *ops = devlink->ops;
bf797471
JP		 1628 u16 pool_index;
1629 u32 threshold;
1630 void *hdr;
1631 int err;
1632
df38dafd
JP		 1633 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1634 tc_index, pool_type,
1635 &pool_index, &threshold);
bf797471
JP		 1636 if (err)
1637 return err;
1638
1639 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1640 if (!hdr)
1641 return -EMSGSIZE;
1642
1643 if (devlink_nl_put_handle(msg, devlink))
1644 goto nla_put_failure;
1645 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1646 goto nla_put_failure;
1647 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1648 goto nla_put_failure;
1649 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1650 goto nla_put_failure;
1651 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1652 goto nla_put_failure;
1653 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1654 goto nla_put_failure;
1655 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1656 goto nla_put_failure;
1657
df38dafd
JP		 1658 if (ops->sb_occ_tc_port_bind_get) {
1659 u32 cur;
1660 u32 max;
1661
1662 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1663 devlink_sb->index,
1664 tc_index, pool_type,
1665 &cur, &max);
1666 if (err && err != -EOPNOTSUPP)
1667 return err;
1668 if (!err) {
1669 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1670 goto nla_put_failure;
1671 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1672 goto nla_put_failure;
1673 }
1674 }
1675
bf797471
JP		 1676 genlmsg_end(msg, hdr);
1677 return 0;
1678
1679nla_put_failure:
1680 genlmsg_cancel(msg, hdr);
1681 return -EMSGSIZE;
1682}
1683
1684static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1685 struct genl_info *info)
1686{
637989b5 1687 struct devlink_port *devlink_port = info->user_ptr[1];
bf797471 1688 struct devlink *devlink = devlink_port->devlink;
637989b5 1689 struct devlink_sb *devlink_sb;
bf797471
JP		 1690 struct sk_buff *msg;
1691 enum devlink_sb_pool_type pool_type;
1692 u16 tc_index;
1693 int err;
1694
637989b5
PP		 1695 devlink_sb = devlink_sb_get_from_info(devlink, info);
1696 if (IS_ERR(devlink_sb))
1697 return PTR_ERR(devlink_sb);
1698
bf797471
JP		 1699 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1700 if (err)
1701 return err;
1702
1703 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1704 pool_type, &tc_index);
1705 if (err)
1706 return err;
1707
be6fe1d8 1708 if (!devlink->ops->sb_tc_pool_bind_get)
bf797471
JP		 1709 return -EOPNOTSUPP;
1710
1711 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1712 if (!msg)
1713 return -ENOMEM;
1714
1715 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1716 devlink_sb, tc_index, pool_type,
1717 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1718 info->snd_portid,
1719 info->snd_seq, 0);
1720 if (err) {
1721 nlmsg_free(msg);
1722 return err;
1723 }
1724
1725 return genlmsg_reply(msg, info);
1726}
1727
1728static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1729 int start, int *p_idx,
1730 struct devlink *devlink,
1731 struct devlink_sb *devlink_sb,
1732 u32 portid, u32 seq)
1733{
1734 struct devlink_port *devlink_port;
1735 u16 tc_index;
1736 int err;
1737
1738 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1739 for (tc_index = 0;
1740 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1741 if (*p_idx < start) {
1742 (*p_idx)++;
1743 continue;
1744 }
1745 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1746 devlink_port,
1747 devlink_sb,
1748 tc_index,
1749 DEVLINK_SB_POOL_TYPE_INGRESS,
1750 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1751 portid, seq,
1752 NLM_F_MULTI);
1753 if (err)
1754 return err;
1755 (*p_idx)++;
1756 }
1757 for (tc_index = 0;
1758 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1759 if (*p_idx < start) {
1760 (*p_idx)++;
1761 continue;
1762 }
1763 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1764 devlink_port,
1765 devlink_sb,
1766 tc_index,
1767 DEVLINK_SB_POOL_TYPE_EGRESS,
1768 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1769 portid, seq,
1770 NLM_F_MULTI);
1771 if (err)
1772 return err;
1773 (*p_idx)++;
1774 }
1775 }
1776 return 0;
1777}
1778
1779static int
1780devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1781 struct netlink_callback *cb)
1782{
1783 struct devlink *devlink;
1784 struct devlink_sb *devlink_sb;
1785 int start = cb->args[0];
1786 int idx = 0;
c62c2cfb 1787 int err = 0;
bf797471
JP		 1788
1789 mutex_lock(&devlink_mutex);
bf797471
JP		 1790 list_for_each_entry(devlink, &devlink_list, list) {
1791 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
be6fe1d8 1792 !devlink->ops->sb_tc_pool_bind_get)
bf797471 1793 continue;
2406e7e5
AS		 1794
1795 mutex_lock(&devlink->lock);
bf797471
JP		 1796 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1797 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1798 devlink,
1799 devlink_sb,
1800 NETLINK_CB(cb->skb).portid,
1801 cb->nlh->nlmsg_seq);
82274d07
JK		 1802 if (err == -EOPNOTSUPP) {
1803 err = 0;
1804 } else if (err) {
2406e7e5 1805 mutex_unlock(&devlink->lock);
bf797471 1806 goto out;
2406e7e5 1807 }
bf797471 1808 }
2406e7e5 1809 mutex_unlock(&devlink->lock);
bf797471
JP		 1810 }
1811out:
bf797471
JP		 1812 mutex_unlock(&devlink_mutex);
1813
c62c2cfb
JP		 1814 if (err != -EMSGSIZE)
1815 return err;
1816
bf797471
JP		 1817 cb->args[0] = idx;
1818 return msg->len;
1819}
1820
1821static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1822 unsigned int sb_index, u16 tc_index,
1823 enum devlink_sb_pool_type pool_type,
f2ad1a52
IS		 1824 u16 pool_index, u32 threshold,
1825 struct netlink_ext_ack *extack)
bf797471
JP		 1826
1827{
1828 const struct devlink_ops *ops = devlink_port->devlink->ops;
1829
be6fe1d8 1830 if (ops->sb_tc_pool_bind_set)
bf797471
JP		 1831 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1832 tc_index, pool_type,
f2ad1a52 1833 pool_index, threshold, extack);
bf797471
JP		 1834 return -EOPNOTSUPP;
1835}
1836
1837static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1838 struct genl_info *info)
1839{
637989b5
PP		 1840 struct devlink_port *devlink_port = info->user_ptr[1];
1841 struct devlink *devlink = info->user_ptr[0];
bf797471 1842 enum devlink_sb_pool_type pool_type;
637989b5 1843 struct devlink_sb *devlink_sb;
bf797471
JP		 1844 u16 tc_index;
1845 u16 pool_index;
1846 u32 threshold;
1847 int err;
1848
637989b5
PP		 1849 devlink_sb = devlink_sb_get_from_info(devlink, info);
1850 if (IS_ERR(devlink_sb))
1851 return PTR_ERR(devlink_sb);
1852
bf797471
JP		 1853 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1854 if (err)
1855 return err;
1856
1857 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1858 pool_type, &tc_index);
1859 if (err)
1860 return err;
1861
1862 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1863 &pool_index);
1864 if (err)
1865 return err;
1866
1867 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1868 return -EINVAL;
1869
1870 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1871 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1872 tc_index, pool_type,
f2ad1a52 1873 pool_index, threshold, info->extack);
bf797471
JP		 1874}
1875
df38dafd
JP		 1876static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1877 struct genl_info *info)
1878{
1879 struct devlink *devlink = info->user_ptr[0];
df38dafd 1880 const struct devlink_ops *ops = devlink->ops;
637989b5
PP		 1881 struct devlink_sb *devlink_sb;
1882
1883 devlink_sb = devlink_sb_get_from_info(devlink, info);
1884 if (IS_ERR(devlink_sb))
1885 return PTR_ERR(devlink_sb);
df38dafd 1886
be6fe1d8 1887 if (ops->sb_occ_snapshot)
df38dafd
JP		 1888 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1889 return -EOPNOTSUPP;
1890}
1891
1892static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1893 struct genl_info *info)
1894{
1895 struct devlink *devlink = info->user_ptr[0];
df38dafd 1896 const struct devlink_ops *ops = devlink->ops;
637989b5
PP		 1897 struct devlink_sb *devlink_sb;
1898
1899 devlink_sb = devlink_sb_get_from_info(devlink, info);
1900 if (IS_ERR(devlink_sb))
1901 return PTR_ERR(devlink_sb);
df38dafd 1902
be6fe1d8 1903 if (ops->sb_occ_max_clear)
df38dafd
JP		 1904 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1905 return -EOPNOTSUPP;
1906}
1907
21e3d2dd
JP		 1908static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1909 enum devlink_command cmd, u32 portid,
1910 u32 seq, int flags)
08f4b591 1911{
59bfde01 1912 const struct devlink_ops *ops = devlink->ops;
98fdbea5
LR		 1913 enum devlink_eswitch_encap_mode encap_mode;
1914 u8 inline_mode;
08f4b591 1915 void *hdr;
59bfde01
RD		 1916 int err = 0;
1917 u16 mode;
08f4b591
OG		 1918
1919 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1920 if (!hdr)
1921 return -EMSGSIZE;
1922
59bfde01
RD		 1923 err = devlink_nl_put_handle(msg, devlink);
1924 if (err)
1a6aa36b 1925 goto nla_put_failure;
08f4b591 1926
4456f61c
JP		 1927 if (ops->eswitch_mode_get) {
1928 err = ops->eswitch_mode_get(devlink, &mode);
1929 if (err)
1930 goto nla_put_failure;
1931 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1932 if (err)
1933 goto nla_put_failure;
1934 }
59bfde01
RD		 1935
1936 if (ops->eswitch_inline_mode_get) {
1937 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1938 if (err)
1a6aa36b 1939 goto nla_put_failure;
59bfde01
RD		 1940 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1941 inline_mode);
1942 if (err)
1a6aa36b 1943 goto nla_put_failure;
59bfde01 1944 }
08f4b591 1945
f43e9b06
RD		 1946 if (ops->eswitch_encap_mode_get) {
1947 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1948 if (err)
1949 goto nla_put_failure;
1950 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1951 if (err)
1952 goto nla_put_failure;
1953 }
1954
08f4b591
OG		 1955 genlmsg_end(msg, hdr);
1956 return 0;
1957
1a6aa36b 1958nla_put_failure:
08f4b591 1959 genlmsg_cancel(msg, hdr);
59bfde01 1960 return err;
08f4b591
OG		 1961}
1962
adf200f3
JP		 1963static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1964 struct genl_info *info)
08f4b591
OG		 1965{
1966 struct devlink *devlink = info->user_ptr[0];
08f4b591 1967 struct sk_buff *msg;
08f4b591
OG		 1968 int err;
1969
08f4b591
OG		 1970 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1971 if (!msg)
1972 return -ENOMEM;
1973
21e3d2dd
JP		 1974 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1975 info->snd_portid, info->snd_seq, 0);
08f4b591
OG		 1976
1977 if (err) {
1978 nlmsg_free(msg);
1979 return err;
1980 }
1981
1982 return genlmsg_reply(msg, info);
1983}
1984
adf200f3
JP		 1985static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1986 struct genl_info *info)
08f4b591
OG		 1987{
1988 struct devlink *devlink = info->user_ptr[0];
1989 const struct devlink_ops *ops = devlink->ops;
98fdbea5
LR		 1990 enum devlink_eswitch_encap_mode encap_mode;
1991 u8 inline_mode;
59bfde01 1992 int err = 0;
f43e9b06 1993 u16 mode;
08f4b591 1994
59bfde01
RD		 1995 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1996 if (!ops->eswitch_mode_set)
1997 return -EOPNOTSUPP;
1998 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
db7ff19e 1999 err = ops->eswitch_mode_set(devlink, mode, info->extack);
59bfde01
RD		 2000 if (err)
2001 return err;
2002 }
08f4b591 2003
59bfde01
RD		 2004 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
2005 if (!ops->eswitch_inline_mode_set)
2006 return -EOPNOTSUPP;
2007 inline_mode = nla_get_u8(
2008 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
db7ff19e
EB		 2009 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
2010 info->extack);
59bfde01
RD		 2011 if (err)
2012 return err;
2013 }
f43e9b06
RD		 2014
2015 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
2016 if (!ops->eswitch_encap_mode_set)
2017 return -EOPNOTSUPP;
2018 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
db7ff19e
EB		 2019 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
2020 info->extack);
f43e9b06
RD		 2021 if (err)
2022 return err;
2023 }
2024
1555d204
AS		 2025 return 0;
2026}
2027
2028int devlink_dpipe_match_put(struct sk_buff *skb,
2029 struct devlink_dpipe_match *match)
2030{
2031 struct devlink_dpipe_header *header = match->header;
2032 struct devlink_dpipe_field *field = &header->fields[match->field_id];
2033 struct nlattr *match_attr;
2034
ae0be8de 2035 match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
1555d204
AS		 2036 if (!match_attr)
2037 return -EMSGSIZE;
2038
2039 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
2040 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
2041 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2042 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2043 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2044 goto nla_put_failure;
2045
2046 nla_nest_end(skb, match_attr);
2047 return 0;
2048
2049nla_put_failure:
2050 nla_nest_cancel(skb, match_attr);
2051 return -EMSGSIZE;
2052}
2053EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
2054
2055static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
2056 struct sk_buff *skb)
2057{
2058 struct nlattr *matches_attr;
2059
ae0be8de
MK		 2060 matches_attr = nla_nest_start_noflag(skb,
2061 DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1555d204
AS		 2062 if (!matches_attr)
2063 return -EMSGSIZE;
2064
2065 if (table->table_ops->matches_dump(table->priv, skb))
2066 goto nla_put_failure;
2067
2068 nla_nest_end(skb, matches_attr);
2069 return 0;
2070
2071nla_put_failure:
2072 nla_nest_cancel(skb, matches_attr);
2073 return -EMSGSIZE;
2074}
2075
2076int devlink_dpipe_action_put(struct sk_buff *skb,
2077 struct devlink_dpipe_action *action)
2078{
2079 struct devlink_dpipe_header *header = action->header;
2080 struct devlink_dpipe_field *field = &header->fields[action->field_id];
2081 struct nlattr *action_attr;
2082
ae0be8de 2083 action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
1555d204
AS		 2084 if (!action_attr)
2085 return -EMSGSIZE;
2086
2087 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
2088 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
2089 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2090 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2091 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2092 goto nla_put_failure;
2093
2094 nla_nest_end(skb, action_attr);
2095 return 0;
2096
2097nla_put_failure:
2098 nla_nest_cancel(skb, action_attr);
2099 return -EMSGSIZE;
2100}
2101EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
2102
2103static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
2104 struct sk_buff *skb)
2105{
2106 struct nlattr *actions_attr;
2107
ae0be8de
MK		 2108 actions_attr = nla_nest_start_noflag(skb,
2109 DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1555d204
AS		 2110 if (!actions_attr)
2111 return -EMSGSIZE;
2112
2113 if (table->table_ops->actions_dump(table->priv, skb))
2114 goto nla_put_failure;
2115
2116 nla_nest_end(skb, actions_attr);
2117 return 0;
2118
2119nla_put_failure:
2120 nla_nest_cancel(skb, actions_attr);
2121 return -EMSGSIZE;
2122}
2123
2124static int devlink_dpipe_table_put(struct sk_buff *skb,
2125 struct devlink_dpipe_table *table)
2126{
2127 struct nlattr *table_attr;
ffd3cdcc 2128 u64 table_size;
1555d204 2129
ffd3cdcc 2130 table_size = table->table_ops->size_get(table->priv);
ae0be8de 2131 table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
1555d204
AS		 2132 if (!table_attr)
2133 return -EMSGSIZE;
2134
2135 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
ffd3cdcc 2136 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1555d204
AS		 2137 DEVLINK_ATTR_PAD))
2138 goto nla_put_failure;
2139 if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
2140 table->counters_enabled))
2141 goto nla_put_failure;
2142
56dc7cd0 2143 if (table->resource_valid) {
3d18e4f1
AS		 2144 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
2145 table->resource_id, DEVLINK_ATTR_PAD) ||
2146 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
2147 table->resource_units, DEVLINK_ATTR_PAD))
2148 goto nla_put_failure;
56dc7cd0 2149 }
1555d204
AS		 2150 if (devlink_dpipe_matches_put(table, skb))
2151 goto nla_put_failure;
2152
2153 if (devlink_dpipe_actions_put(table, skb))
2154 goto nla_put_failure;
2155
2156 nla_nest_end(skb, table_attr);
2157 return 0;
2158
2159nla_put_failure:
2160 nla_nest_cancel(skb, table_attr);
2161 return -EMSGSIZE;
2162}
2163
2164static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
2165 struct genl_info *info)
2166{
2167 int err;
2168
2169 if (*pskb) {
2170 err = genlmsg_reply(*pskb, info);
2171 if (err)
2172 return err;
2173 }
2174 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2175 if (!*pskb)
2176 return -ENOMEM;
2177 return 0;
2178}
2179
2180static int devlink_dpipe_tables_fill(struct genl_info *info,
2181 enum devlink_command cmd, int flags,
2182 struct list_head *dpipe_tables,
2183 const char *table_name)
2184{
2185 struct devlink *devlink = info->user_ptr[0];
2186 struct devlink_dpipe_table *table;
2187 struct nlattr *tables_attr;
2188 struct sk_buff *skb = NULL;
2189 struct nlmsghdr *nlh;
2190 bool incomplete;
2191 void *hdr;
2192 int i;
2193 int err;
2194
2195 table = list_first_entry(dpipe_tables,
2196 struct devlink_dpipe_table, list);
2197start_again:
2198 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2199 if (err)
2200 return err;
2201
2202 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2203 &devlink_nl_family, NLM_F_MULTI, cmd);
6044bd4a
HY		 2204 if (!hdr) {
2205 nlmsg_free(skb);
1555d204 2206 return -EMSGSIZE;
6044bd4a 2207 }
1555d204
AS		 2208
2209 if (devlink_nl_put_handle(skb, devlink))
2210 goto nla_put_failure;
ae0be8de 2211 tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
1555d204
AS		 2212 if (!tables_attr)
2213 goto nla_put_failure;
2214
2215 i = 0;
2216 incomplete = false;
2217 list_for_each_entry_from(table, dpipe_tables, list) {
2218 if (!table_name) {
2219 err = devlink_dpipe_table_put(skb, table);
2220 if (err) {
2221 if (!i)
2222 goto err_table_put;
2223 incomplete = true;
2224 break;
2225 }
2226 } else {
2227 if (!strcmp(table->name, table_name)) {
2228 err = devlink_dpipe_table_put(skb, table);
2229 if (err)
2230 break;
2231 }
2232 }
2233 i++;
2234 }
2235
2236 nla_nest_end(skb, tables_attr);
2237 genlmsg_end(skb, hdr);
2238 if (incomplete)
2239 goto start_again;
2240
2241send_done:
2242 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2243 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2244 if (!nlh) {
2245 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2246 if (err)
7fe4d6dc 2247 return err;
1555d204
AS		 2248 goto send_done;
2249 }
2250
2251 return genlmsg_reply(skb, info);
2252
2253nla_put_failure:
2254 err = -EMSGSIZE;
2255err_table_put:
1555d204
AS		 2256 nlmsg_free(skb);
2257 return err;
2258}
2259
2260static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
2261 struct genl_info *info)
2262{
2263 struct devlink *devlink = info->user_ptr[0];
2264 const char *table_name = NULL;
2265
2266 if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2267 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2268
2269 return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
2270 &devlink->dpipe_table_list,
2271 table_name);
2272}
2273
2274static int devlink_dpipe_value_put(struct sk_buff *skb,
2275 struct devlink_dpipe_value *value)
2276{
2277 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
2278 value->value_size, value->value))
2279 return -EMSGSIZE;
2280 if (value->mask)
2281 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
2282 value->value_size, value->mask))
2283 return -EMSGSIZE;
2284 if (value->mapping_valid)
2285 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
2286 value->mapping_value))
2287 return -EMSGSIZE;
2288 return 0;
2289}
2290
2291static int devlink_dpipe_action_value_put(struct sk_buff *skb,
2292 struct devlink_dpipe_value *value)
2293{
2294 if (!value->action)
2295 return -EINVAL;
2296 if (devlink_dpipe_action_put(skb, value->action))
2297 return -EMSGSIZE;
2298 if (devlink_dpipe_value_put(skb, value))
2299 return -EMSGSIZE;
2300 return 0;
2301}
2302
2303static int devlink_dpipe_action_values_put(struct sk_buff *skb,
2304 struct devlink_dpipe_value *values,
2305 unsigned int values_count)
2306{
2307 struct nlattr *action_attr;
2308 int i;
2309 int err;
2310
2311 for (i = 0; i < values_count; i++) {
ae0be8de
MK		 2312 action_attr = nla_nest_start_noflag(skb,
2313 DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1555d204
AS		 2314 if (!action_attr)
2315 return -EMSGSIZE;
2316 err = devlink_dpipe_action_value_put(skb, &values[i]);
2317 if (err)
2318 goto err_action_value_put;
2319 nla_nest_end(skb, action_attr);
2320 }
2321 return 0;
2322
2323err_action_value_put:
2324 nla_nest_cancel(skb, action_attr);
2325 return err;
2326}
2327
2328static int devlink_dpipe_match_value_put(struct sk_buff *skb,
2329 struct devlink_dpipe_value *value)
2330{
2331 if (!value->match)
2332 return -EINVAL;
2333 if (devlink_dpipe_match_put(skb, value->match))
2334 return -EMSGSIZE;
2335 if (devlink_dpipe_value_put(skb, value))
2336 return -EMSGSIZE;
2337 return 0;
2338}
2339
2340static int devlink_dpipe_match_values_put(struct sk_buff *skb,
2341 struct devlink_dpipe_value *values,
2342 unsigned int values_count)
2343{
2344 struct nlattr *match_attr;
2345 int i;
2346 int err;
2347
2348 for (i = 0; i < values_count; i++) {
ae0be8de
MK		 2349 match_attr = nla_nest_start_noflag(skb,
2350 DEVLINK_ATTR_DPIPE_MATCH_VALUE);
1555d204
AS		 2351 if (!match_attr)
2352 return -EMSGSIZE;
2353 err = devlink_dpipe_match_value_put(skb, &values[i]);
2354 if (err)
2355 goto err_match_value_put;
2356 nla_nest_end(skb, match_attr);
2357 }
2358 return 0;
2359
2360err_match_value_put:
2361 nla_nest_cancel(skb, match_attr);
2362 return err;
2363}
2364
2365static int devlink_dpipe_entry_put(struct sk_buff *skb,
2366 struct devlink_dpipe_entry *entry)
2367{
2368 struct nlattr *entry_attr, *matches_attr, *actions_attr;
2369 int err;
2370
ae0be8de 2371 entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
1555d204
AS		 2372 if (!entry_attr)
2373 return -EMSGSIZE;
2374
2375 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2376 DEVLINK_ATTR_PAD))
2377 goto nla_put_failure;
2378 if (entry->counter_valid)
2379 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2380 entry->counter, DEVLINK_ATTR_PAD))
2381 goto nla_put_failure;
2382
ae0be8de
MK		 2383 matches_attr = nla_nest_start_noflag(skb,
2384 DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
1555d204
AS		 2385 if (!matches_attr)
2386 goto nla_put_failure;
2387
2388 err = devlink_dpipe_match_values_put(skb, entry->match_values,
2389 entry->match_values_count);
2390 if (err) {
2391 nla_nest_cancel(skb, matches_attr);
2392 goto err_match_values_put;
2393 }
2394 nla_nest_end(skb, matches_attr);
2395
ae0be8de
MK		 2396 actions_attr = nla_nest_start_noflag(skb,
2397 DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
1555d204
AS		 2398 if (!actions_attr)
2399 goto nla_put_failure;
2400
2401 err = devlink_dpipe_action_values_put(skb, entry->action_values,
2402 entry->action_values_count);
2403 if (err) {
2404 nla_nest_cancel(skb, actions_attr);
2405 goto err_action_values_put;
2406 }
2407 nla_nest_end(skb, actions_attr);
59bfde01 2408
1555d204 2409 nla_nest_end(skb, entry_attr);
59bfde01 2410 return 0;
1555d204
AS		 2411
2412nla_put_failure:
2413 err = -EMSGSIZE;
2414err_match_values_put:
2415err_action_values_put:
2416 nla_nest_cancel(skb, entry_attr);
2417 return err;
2418}
2419
2420static struct devlink_dpipe_table *
2421devlink_dpipe_table_find(struct list_head *dpipe_tables,
2eb51c75 2422 const char *table_name, struct devlink *devlink)
1555d204
AS		 2423{
2424 struct devlink_dpipe_table *table;
2eb51c75
MB		 2425 list_for_each_entry_rcu(table, dpipe_tables, list,
2426 lockdep_is_held(&devlink->lock)) {
1555d204
AS		 2427 if (!strcmp(table->name, table_name))
2428 return table;
2429 }
2430 return NULL;
2431}
2432
2433int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2434{
2435 struct devlink *devlink;
2436 int err;
2437
2438 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2439 dump_ctx->info);
2440 if (err)
2441 return err;
2442
2443 dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2444 dump_ctx->info->snd_portid,
2445 dump_ctx->info->snd_seq,
2446 &devlink_nl_family, NLM_F_MULTI,
2447 dump_ctx->cmd);
2448 if (!dump_ctx->hdr)
2449 goto nla_put_failure;
2450
2451 devlink = dump_ctx->info->user_ptr[0];
2452 if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2453 goto nla_put_failure;
ae0be8de
MK		 2454 dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2455 DEVLINK_ATTR_DPIPE_ENTRIES);
1555d204
AS		 2456 if (!dump_ctx->nest)
2457 goto nla_put_failure;
2458 return 0;
2459
2460nla_put_failure:
1555d204
AS		 2461 nlmsg_free(dump_ctx->skb);
2462 return -EMSGSIZE;
2463}
2464EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2465
2466int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2467 struct devlink_dpipe_entry *entry)
2468{
2469 return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2470}
2471EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2472
2473int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2474{
2475 nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2476 genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2477 return 0;
2478}
2479EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2480
35807324
AS		 2481void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2482
2483{
2484 unsigned int value_count, value_index;
2485 struct devlink_dpipe_value *value;
2486
2487 value = entry->action_values;
2488 value_count = entry->action_values_count;
2489 for (value_index = 0; value_index < value_count; value_index++) {
2490 kfree(value[value_index].value);
2491 kfree(value[value_index].mask);
2492 }
2493
2494 value = entry->match_values;
2495 value_count = entry->match_values_count;
2496 for (value_index = 0; value_index < value_count; value_index++) {
2497 kfree(value[value_index].value);
2498 kfree(value[value_index].mask);
2499 }
2500}
2501EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2502
1555d204
AS		 2503static int devlink_dpipe_entries_fill(struct genl_info *info,
2504 enum devlink_command cmd, int flags,
2505 struct devlink_dpipe_table *table)
2506{
2507 struct devlink_dpipe_dump_ctx dump_ctx;
2508 struct nlmsghdr *nlh;
2509 int err;
2510
2511 dump_ctx.skb = NULL;
2512 dump_ctx.cmd = cmd;
2513 dump_ctx.info = info;
2514
2515 err = table->table_ops->entries_dump(table->priv,
2516 table->counters_enabled,
2517 &dump_ctx);
2518 if (err)
7fe4d6dc 2519 return err;
1555d204
AS		 2520
2521send_done:
2522 nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2523 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2524 if (!nlh) {
2525 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2526 if (err)
7fe4d6dc 2527 return err;
1555d204
AS		 2528 goto send_done;
2529 }
2530 return genlmsg_reply(dump_ctx.skb, info);
1555d204
AS		 2531}
2532
2533static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2534 struct genl_info *info)
2535{
2536 struct devlink *devlink = info->user_ptr[0];
2537 struct devlink_dpipe_table *table;
2538 const char *table_name;
2539
2540 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2541 return -EINVAL;
2542
2543 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2544 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2eb51c75 2545 table_name, devlink);
1555d204
AS		 2546 if (!table)
2547 return -EINVAL;
2548
2549 if (!table->table_ops->entries_dump)
2550 return -EINVAL;
2551
2552 return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2553 0, table);
2554}
2555
2556static int devlink_dpipe_fields_put(struct sk_buff *skb,
2557 const struct devlink_dpipe_header *header)
2558{
2559 struct devlink_dpipe_field *field;
2560 struct nlattr *field_attr;
2561 int i;
2562
2563 for (i = 0; i < header->fields_count; i++) {
2564 field = &header->fields[i];
ae0be8de
MK		 2565 field_attr = nla_nest_start_noflag(skb,
2566 DEVLINK_ATTR_DPIPE_FIELD);
1555d204
AS		 2567 if (!field_attr)
2568 return -EMSGSIZE;
2569 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2570 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2571 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2572 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2573 goto nla_put_failure;
2574 nla_nest_end(skb, field_attr);
2575 }
2576 return 0;
2577
2578nla_put_failure:
2579 nla_nest_cancel(skb, field_attr);
2580 return -EMSGSIZE;
2581}
2582
2583static int devlink_dpipe_header_put(struct sk_buff *skb,
2584 struct devlink_dpipe_header *header)
2585{
2586 struct nlattr *fields_attr, *header_attr;
2587 int err;
2588
ae0be8de 2589 header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
cb6bf9cf 2590 if (!header_attr)
1555d204
AS		 2591 return -EMSGSIZE;
2592
2593 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2594 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2595 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2596 goto nla_put_failure;
2597
ae0be8de
MK		 2598 fields_attr = nla_nest_start_noflag(skb,
2599 DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
1555d204
AS		 2600 if (!fields_attr)
2601 goto nla_put_failure;
2602
2603 err = devlink_dpipe_fields_put(skb, header);
2604 if (err) {
2605 nla_nest_cancel(skb, fields_attr);
2606 goto nla_put_failure;
2607 }
2608 nla_nest_end(skb, fields_attr);
2609 nla_nest_end(skb, header_attr);
2610 return 0;
2611
2612nla_put_failure:
2613 err = -EMSGSIZE;
2614 nla_nest_cancel(skb, header_attr);
2615 return err;
2616}
2617
2618static int devlink_dpipe_headers_fill(struct genl_info *info,
2619 enum devlink_command cmd, int flags,
2620 struct devlink_dpipe_headers *
2621 dpipe_headers)
2622{
2623 struct devlink *devlink = info->user_ptr[0];
2624 struct nlattr *headers_attr;
2625 struct sk_buff *skb = NULL;
2626 struct nlmsghdr *nlh;
2627 void *hdr;
2628 int i, j;
2629 int err;
2630
2631 i = 0;
2632start_again:
2633 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2634 if (err)
2635 return err;
2636
2637 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2638 &devlink_nl_family, NLM_F_MULTI, cmd);
6044bd4a
HY		 2639 if (!hdr) {
2640 nlmsg_free(skb);
1555d204 2641 return -EMSGSIZE;
6044bd4a 2642 }
1555d204
AS		 2643
2644 if (devlink_nl_put_handle(skb, devlink))
2645 goto nla_put_failure;
ae0be8de 2646 headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
1555d204
AS		 2647 if (!headers_attr)
2648 goto nla_put_failure;
2649
2650 j = 0;
2651 for (; i < dpipe_headers->headers_count; i++) {
2652 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2653 if (err) {
2654 if (!j)
2655 goto err_table_put;
2656 break;
2657 }
2658 j++;
2659 }
2660 nla_nest_end(skb, headers_attr);
2661 genlmsg_end(skb, hdr);
2662 if (i != dpipe_headers->headers_count)
2663 goto start_again;
2664
2665send_done:
2666 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2667 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2668 if (!nlh) {
2669 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2670 if (err)
7fe4d6dc 2671 return err;
1555d204
AS		 2672 goto send_done;
2673 }
2674 return genlmsg_reply(skb, info);
2675
2676nla_put_failure:
2677 err = -EMSGSIZE;
2678err_table_put:
1555d204
AS		 2679 nlmsg_free(skb);
2680 return err;
2681}
2682
2683static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2684 struct genl_info *info)
2685{
2686 struct devlink *devlink = info->user_ptr[0];
2687
2688 if (!devlink->dpipe_headers)
2689 return -EOPNOTSUPP;
2690 return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2691 0, devlink->dpipe_headers);
2692}
2693
2694static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2695 const char *table_name,
2696 bool enable)
2697{
2698 struct devlink_dpipe_table *table;
2699
2700 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2eb51c75 2701 table_name, devlink);
1555d204
AS		 2702 if (!table)
2703 return -EINVAL;
2704
2705 if (table->counter_control_extern)
2706 return -EOPNOTSUPP;
2707
2708 if (!(table->counters_enabled ^ enable))
2709 return 0;
2710
2711 table->counters_enabled = enable;
2712 if (table->table_ops->counters_set_update)
2713 table->table_ops->counters_set_update(table->priv, enable);
2714 return 0;
2715}
2716
2717static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2718 struct genl_info *info)
2719{
2720 struct devlink *devlink = info->user_ptr[0];
2721 const char *table_name;
2722 bool counters_enable;
2723
2724 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2725 !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2726 return -EINVAL;
2727
2728 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2729 counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2730
2731 return devlink_dpipe_table_counters_set(devlink, table_name,
2732 counters_enable);
08f4b591
OG		 2733}
2734
43dd7512 2735static struct devlink_resource *
d9f9b9a4
AS		 2736devlink_resource_find(struct devlink *devlink,
2737 struct devlink_resource *resource, u64 resource_id)
2738{
2739 struct list_head *resource_list;
2740
2741 if (resource)
2742 resource_list = &resource->resource_list;
2743 else
2744 resource_list = &devlink->resource_list;
2745
2746 list_for_each_entry(resource, resource_list, list) {
2747 struct devlink_resource *child_resource;
2748
2749 if (resource->id == resource_id)
2750 return resource;
2751
2752 child_resource = devlink_resource_find(devlink, resource,
2753 resource_id);
2754 if (child_resource)
2755 return child_resource;
2756 }
2757 return NULL;
2758}
2759
43dd7512
WY		 2760static void
2761devlink_resource_validate_children(struct devlink_resource *resource)
d9f9b9a4
AS		 2762{
2763 struct devlink_resource *child_resource;
2764 bool size_valid = true;
2765 u64 parts_size = 0;
2766
2767 if (list_empty(&resource->resource_list))
2768 goto out;
2769
2770 list_for_each_entry(child_resource, &resource->resource_list, list)
2771 parts_size += child_resource->size_new;
2772
b9d17175 2773 if (parts_size > resource->size_new)
d9f9b9a4
AS		 2774 size_valid = false;
2775out:
2776 resource->size_valid = size_valid;
2777}
2778
cc944ead
AS		 2779static int
2780devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2781 struct netlink_ext_ack *extack)
2782{
2783 u64 reminder;
2784 int err = 0;
2785
0f3e9c97 2786 if (size > resource->size_params.size_max) {
cc944ead
AS		 2787 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2788 err = -EINVAL;
2789 }
2790
0f3e9c97 2791 if (size < resource->size_params.size_min) {
cc944ead
AS		 2792 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2793 err = -EINVAL;
2794 }
2795
0f3e9c97 2796 div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
cc944ead
AS		 2797 if (reminder) {
2798 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2799 err = -EINVAL;
2800 }
2801
2802 return err;
2803}
2804
d9f9b9a4
AS		 2805static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2806 struct genl_info *info)
2807{
2808 struct devlink *devlink = info->user_ptr[0];
2809 struct devlink_resource *resource;
2810 u64 resource_id;
2811 u64 size;
2812 int err;
2813
2814 if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2815 !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2816 return -EINVAL;
2817 resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2818
2819 resource = devlink_resource_find(devlink, NULL, resource_id);
2820 if (!resource)
2821 return -EINVAL;
2822
d9f9b9a4 2823 size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
cc944ead 2824 err = devlink_resource_validate_size(resource, size, info->extack);
d9f9b9a4
AS		 2825 if (err)
2826 return err;
2827
2828 resource->size_new = size;
2829 devlink_resource_validate_children(resource);
2830 if (resource->parent)
2831 devlink_resource_validate_children(resource->parent);
2832 return 0;
2833}
2834
3d18e4f1 2835static int
d9f9b9a4
AS		 2836devlink_resource_size_params_put(struct devlink_resource *resource,
2837 struct sk_buff *skb)
2838{
2839 struct devlink_resource_size_params *size_params;
2840
77d27096 2841 size_params = &resource->size_params;
3d18e4f1
AS		 2842 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2843 size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2844 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2845 size_params->size_max, DEVLINK_ATTR_PAD) ||
2846 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2847 size_params->size_min, DEVLINK_ATTR_PAD) ||
2848 nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2849 return -EMSGSIZE;
2850 return 0;
d9f9b9a4
AS		 2851}
2852
fc56be47
JP		 2853static int devlink_resource_occ_put(struct devlink_resource *resource,
2854 struct sk_buff *skb)
2855{
2856 if (!resource->occ_get)
2857 return 0;
2858 return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2859 resource->occ_get(resource->occ_get_priv),
2860 DEVLINK_ATTR_PAD);
2861}
2862
d9f9b9a4
AS		 2863static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2864 struct devlink_resource *resource)
2865{
2866 struct devlink_resource *child_resource;
2867 struct nlattr *child_resource_attr;
2868 struct nlattr *resource_attr;
2869
ae0be8de 2870 resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
d9f9b9a4
AS		 2871 if (!resource_attr)
2872 return -EMSGSIZE;
2873
2874 if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2875 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2876 DEVLINK_ATTR_PAD) ||
2877 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2878 DEVLINK_ATTR_PAD))
2879 goto nla_put_failure;
2880 if (resource->size != resource->size_new)
2881 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2882 resource->size_new, DEVLINK_ATTR_PAD);
fc56be47
JP		 2883 if (devlink_resource_occ_put(resource, skb))
2884 goto nla_put_failure;
3d18e4f1
AS		 2885 if (devlink_resource_size_params_put(resource, skb))
2886 goto nla_put_failure;
d9f9b9a4
AS		 2887 if (list_empty(&resource->resource_list))
2888 goto out;
2889
2890 if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2891 resource->size_valid))
2892 goto nla_put_failure;
2893
ae0be8de
MK		 2894 child_resource_attr = nla_nest_start_noflag(skb,
2895 DEVLINK_ATTR_RESOURCE_LIST);
d9f9b9a4
AS		 2896 if (!child_resource_attr)
2897 goto nla_put_failure;
2898
2899 list_for_each_entry(child_resource, &resource->resource_list, list) {
2900 if (devlink_resource_put(devlink, skb, child_resource))
2901 goto resource_put_failure;
2902 }
2903
2904 nla_nest_end(skb, child_resource_attr);
2905out:
2906 nla_nest_end(skb, resource_attr);
2907 return 0;
2908
2909resource_put_failure:
2910 nla_nest_cancel(skb, child_resource_attr);
2911nla_put_failure:
2912 nla_nest_cancel(skb, resource_attr);
2913 return -EMSGSIZE;
2914}
2915
2916static int devlink_resource_fill(struct genl_info *info,
2917 enum devlink_command cmd, int flags)
2918{
2919 struct devlink *devlink = info->user_ptr[0];
2920 struct devlink_resource *resource;
2921 struct nlattr *resources_attr;
2922 struct sk_buff *skb = NULL;
2923 struct nlmsghdr *nlh;
2924 bool incomplete;
2925 void *hdr;
2926 int i;
2927 int err;
2928
2929 resource = list_first_entry(&devlink->resource_list,
2930 struct devlink_resource, list);
2931start_again:
2932 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2933 if (err)
2934 return err;
2935
2936 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2937 &devlink_nl_family, NLM_F_MULTI, cmd);
2938 if (!hdr) {
2939 nlmsg_free(skb);
2940 return -EMSGSIZE;
2941 }
2942
2943 if (devlink_nl_put_handle(skb, devlink))
2944 goto nla_put_failure;
2945
ae0be8de
MK		 2946 resources_attr = nla_nest_start_noflag(skb,
2947 DEVLINK_ATTR_RESOURCE_LIST);
d9f9b9a4
AS		 2948 if (!resources_attr)
2949 goto nla_put_failure;
2950
2951 incomplete = false;
2952 i = 0;
2953 list_for_each_entry_from(resource, &devlink->resource_list, list) {
2954 err = devlink_resource_put(devlink, skb, resource);
2955 if (err) {
2956 if (!i)
2957 goto err_resource_put;
2958 incomplete = true;
2959 break;
2960 }
2961 i++;
2962 }
2963 nla_nest_end(skb, resources_attr);
2964 genlmsg_end(skb, hdr);
2965 if (incomplete)
2966 goto start_again;
2967send_done:
2968 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2969 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2970 if (!nlh) {
2971 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2972 if (err)
83fe9a96 2973 return err;
d9f9b9a4
AS		 2974 goto send_done;
2975 }
2976 return genlmsg_reply(skb, info);
2977
2978nla_put_failure:
2979 err = -EMSGSIZE;
2980err_resource_put:
d9f9b9a4
AS		 2981 nlmsg_free(skb);
2982 return err;
2983}
2984
2985static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2986 struct genl_info *info)
2987{
2988 struct devlink *devlink = info->user_ptr[0];
2989
2990 if (list_empty(&devlink->resource_list))
2991 return -EOPNOTSUPP;
2992
2993 return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2994}
2995
2d8dc5bb
AS		 2996static int
2997devlink_resources_validate(struct devlink *devlink,
2998 struct devlink_resource *resource,
2999 struct genl_info *info)
3000{
3001 struct list_head *resource_list;
3002 int err = 0;
3003
3004 if (resource)
3005 resource_list = &resource->resource_list;
3006 else
3007 resource_list = &devlink->resource_list;
3008
3009 list_for_each_entry(resource, resource_list, list) {
3010 if (!resource->size_valid)
3011 return -EINVAL;
3012 err = devlink_resources_validate(devlink, resource, info);
3013 if (err)
3014 return err;
3015 }
3016 return err;
3017}
3018
070c63f2
JP		 3019static struct net *devlink_netns_get(struct sk_buff *skb,
3020 struct genl_info *info)
3021{
3022 struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
3023 struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
3024 struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
3025 struct net *net;
3026
3027 if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
054eae82 3028 NL_SET_ERR_MSG_MOD(info->extack, "multiple netns identifying attributes specified");
070c63f2
JP		 3029 return ERR_PTR(-EINVAL);
3030 }
3031
3032 if (netns_pid_attr) {
3033 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
3034 } else if (netns_fd_attr) {
3035 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
3036 } else if (netns_id_attr) {
3037 net = get_net_ns_by_id(sock_net(skb->sk),
3038 nla_get_u32(netns_id_attr));
3039 if (!net)
3040 net = ERR_PTR(-EINVAL);
3041 } else {
3042 WARN_ON(1);
3043 net = ERR_PTR(-EINVAL);
3044 }
3045 if (IS_ERR(net)) {
054eae82 3046 NL_SET_ERR_MSG_MOD(info->extack, "Unknown network namespace");
070c63f2
JP		 3047 return ERR_PTR(-EINVAL);
3048 }
3049 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
3050 put_net(net);
3051 return ERR_PTR(-EPERM);
3052 }
3053 return net;
3054}
3055
3056static void devlink_param_notify(struct devlink *devlink,
3057 unsigned int port_index,
3058 struct devlink_param_item *param_item,
3059 enum devlink_command cmd);
3060
3061static void devlink_reload_netns_change(struct devlink *devlink,
3062 struct net *dest_net)
3063{
3064 struct devlink_param_item *param_item;
3065
3066 /* Userspace needs to be notified about devlink objects
3067 * removed from original and entering new network namespace.
3068 * The rest of the devlink objects are re-created during
3069 * reload process so the notifications are generated separatelly.
3070 */
3071
3072 list_for_each_entry(param_item, &devlink->param_list, list)
3073 devlink_param_notify(devlink, 0, param_item,
3074 DEVLINK_CMD_PARAM_DEL);
3075 devlink_notify(devlink, DEVLINK_CMD_DEL);
3076
8273fd84 3077 __devlink_net_set(devlink, dest_net);
070c63f2
JP		 3078
3079 devlink_notify(devlink, DEVLINK_CMD_NEW);
3080 list_for_each_entry(param_item, &devlink->param_list, list)
3081 devlink_param_notify(devlink, 0, param_item,
3082 DEVLINK_CMD_PARAM_NEW);
3083}
3084
69d56e0e 3085static bool devlink_reload_supported(const struct devlink_ops *ops)
97691069 3086{
69d56e0e 3087 return ops->reload_down && ops->reload_up;
97691069
JP		 3088}
3089
2670ac26
JP		 3090static void devlink_reload_failed_set(struct devlink *devlink,
3091 bool reload_failed)
3092{
3093 if (devlink->reload_failed == reload_failed)
3094 return;
3095 devlink->reload_failed = reload_failed;
3096 devlink_notify(devlink, DEVLINK_CMD_NEW);
3097}
3098
3099bool devlink_is_reload_failed(const struct devlink *devlink)
3100{
3101 return devlink->reload_failed;
3102}
3103EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
3104
a254c264
MS		 3105static void
3106__devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats,
3107 enum devlink_reload_limit limit, u32 actions_performed)
3108{
3109 unsigned long actions = actions_performed;
3110 int stat_idx;
3111 int action;
3112
3113 for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) {
3114 stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action;
3115 reload_stats[stat_idx]++;
3116 }
3117 devlink_notify(devlink, DEVLINK_CMD_NEW);
3118}
3119
3120static void
3121devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit,
3122 u32 actions_performed)
3123{
3124 __devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit,
3125 actions_performed);
3126}
3127
77069ba2
MS		 3128/**
3129 * devlink_remote_reload_actions_performed - Update devlink on reload actions
3130 * performed which are not a direct result of devlink reload call.
3131 *
3132 * This should be called by a driver after performing reload actions in case it was not
3133 * a result of devlink reload call. For example fw_activate was performed as a result
3134 * of devlink reload triggered fw_activate on another host.
3135 * The motivation for this function is to keep data on reload actions performed on this
3136 * function whether it was done due to direct devlink reload call or not.
3137 *
3138 * @devlink: devlink
3139 * @limit: reload limit
3140 * @actions_performed: bitmask of actions performed
3141 */
3142void devlink_remote_reload_actions_performed(struct devlink *devlink,
3143 enum devlink_reload_limit limit,
3144 u32 actions_performed)
3145{
3146 if (WARN_ON(!actions_performed ||
3147 actions_performed & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
3148 actions_performed >= BIT(__DEVLINK_RELOAD_ACTION_MAX) ||
3149 limit > DEVLINK_RELOAD_LIMIT_MAX))
3150 return;
3151
3152 __devlink_reload_stats_update(devlink, devlink->stats.remote_reload_stats, limit,
3153 actions_performed);
3154}
3155EXPORT_SYMBOL_GPL(devlink_remote_reload_actions_performed);
3156
070c63f2 3157static int devlink_reload(struct devlink *devlink, struct net *dest_net,
dc64cc7c
MS		 3158 enum devlink_reload_action action, enum devlink_reload_limit limit,
3159 u32 *actions_performed, struct netlink_ext_ack *extack)
070c63f2 3160{
77069ba2 3161 u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
070c63f2
JP		 3162 int err;
3163
a0c76345
JP		 3164 if (!devlink->reload_enabled)
3165 return -EOPNOTSUPP;
3166
77069ba2
MS		 3167 memcpy(remote_reload_stats, devlink->stats.remote_reload_stats,
3168 sizeof(remote_reload_stats));
dc64cc7c 3169 err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
070c63f2
JP		 3170 if (err)
3171 return err;
3172
3173 if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
3174 devlink_reload_netns_change(devlink, dest_net);
3175
dc64cc7c 3176 err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack);
070c63f2 3177 devlink_reload_failed_set(devlink, !!err);
ccdf0721
MS		 3178 if (err)
3179 return err;
3180
3181 WARN_ON(!(*actions_performed & BIT(action)));
77069ba2
MS		 3182 /* Catch driver on updating the remote action within devlink reload */
3183 WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats,
3184 sizeof(remote_reload_stats)));
a254c264 3185 devlink_reload_stats_update(devlink, limit, *actions_performed);
ccdf0721
MS		 3186 return 0;
3187}
3188
3189static int
3190devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed,
3191 enum devlink_command cmd, struct genl_info *info)
3192{
3193 struct sk_buff *msg;
3194 void *hdr;
3195
3196 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3197 if (!msg)
3198 return -ENOMEM;
3199
3200 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd);
3201 if (!hdr)
3202 goto free_msg;
3203
3204 if (devlink_nl_put_handle(msg, devlink))
3205 goto nla_put_failure;
3206
3207 if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed,
3208 actions_performed))
3209 goto nla_put_failure;
3210 genlmsg_end(msg, hdr);
3211
3212 return genlmsg_reply(msg, info);
3213
3214nla_put_failure:
3215 genlmsg_cancel(msg, hdr);
3216free_msg:
3217 nlmsg_free(msg);
3218 return -EMSGSIZE;
070c63f2
JP		 3219}
3220
2d8dc5bb
AS		 3221static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
3222{
3223 struct devlink *devlink = info->user_ptr[0];
ccdf0721 3224 enum devlink_reload_action action;
dc64cc7c 3225 enum devlink_reload_limit limit;
070c63f2 3226 struct net *dest_net = NULL;
ccdf0721 3227 u32 actions_performed;
2d8dc5bb
AS		 3228 int err;
3229
69d56e0e 3230 if (!devlink_reload_supported(devlink->ops))
2d8dc5bb
AS		 3231 return -EOPNOTSUPP;
3232
3233 err = devlink_resources_validate(devlink, NULL, info);
3234 if (err) {
3235 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
3236 return err;
3237 }
070c63f2
JP		 3238
3239 if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
3240 info->attrs[DEVLINK_ATTR_NETNS_FD] ||
3241 info->attrs[DEVLINK_ATTR_NETNS_ID]) {
3242 dest_net = devlink_netns_get(skb, info);
3243 if (IS_ERR(dest_net))
3244 return PTR_ERR(dest_net);
3245 }
3246
ccdf0721
MS		 3247 if (info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
3248 action = nla_get_u8(info->attrs[DEVLINK_ATTR_RELOAD_ACTION]);
3249 else
3250 action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT;
3251
3252 if (!devlink_reload_action_is_supported(devlink, action)) {
3253 NL_SET_ERR_MSG_MOD(info->extack,
3254 "Requested reload action is not supported by the driver");
3255 return -EOPNOTSUPP;
3256 }
3257
dc64cc7c
MS		 3258 limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
3259 if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
3260 struct nla_bitfield32 limits;
3261 u32 limits_selected;
3262
3263 limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
3264 limits_selected = limits.value & limits.selector;
3265 if (!limits_selected) {
3266 NL_SET_ERR_MSG_MOD(info->extack, "Invalid limit selected");
3267 return -EINVAL;
3268 }
3269 for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
3270 if (limits_selected & BIT(limit))
3271 break;
3272 /* UAPI enables multiselection, but currently it is not used */
3273 if (limits_selected != BIT(limit)) {
3274 NL_SET_ERR_MSG_MOD(info->extack,
3275 "Multiselection of limit is not supported");
3276 return -EOPNOTSUPP;
3277 }
3278 if (!devlink_reload_limit_is_supported(devlink, limit)) {
3279 NL_SET_ERR_MSG_MOD(info->extack,
3280 "Requested limit is not supported by the driver");
3281 return -EOPNOTSUPP;
3282 }
3283 if (devlink_reload_combination_is_invalid(action, limit)) {
3284 NL_SET_ERR_MSG_MOD(info->extack,
3285 "Requested limit is invalid for this action");
3286 return -EINVAL;
3287 }
3288 }
3289 err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
070c63f2
JP		 3290
3291 if (dest_net)
3292 put_net(dest_net);
3293
ccdf0721
MS		 3294 if (err)
3295 return err;
3296 /* For backward compatibility generate reply only if attributes used by user */
dc64cc7c 3297 if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
ccdf0721
MS		 3298 return 0;
3299
3300 return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
3301 DEVLINK_CMD_RELOAD, info);
2d8dc5bb
AS		 3302}
3303
191ed202
JP		 3304static int devlink_nl_flash_update_fill(struct sk_buff *msg,
3305 struct devlink *devlink,
3306 enum devlink_command cmd,
6700acc5 3307 struct devlink_flash_notify *params)
191ed202
JP		 3308{
3309 void *hdr;
3310
3311 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3312 if (!hdr)
3313 return -EMSGSIZE;
3314
3315 if (devlink_nl_put_handle(msg, devlink))
3316 goto nla_put_failure;
3317
3318 if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
3319 goto out;
3320
6700acc5 3321 if (params->status_msg &&
191ed202 3322 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
6700acc5 3323 params->status_msg))
191ed202 3324 goto nla_put_failure;
6700acc5 3325 if (params->component &&
191ed202 3326 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
6700acc5 3327 params->component))
191ed202
JP		 3328 goto nla_put_failure;
3329 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
6700acc5 3330 params->done, DEVLINK_ATTR_PAD))
191ed202
JP		 3331 goto nla_put_failure;
3332 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
6700acc5 3333 params->total, DEVLINK_ATTR_PAD))
191ed202 3334 goto nla_put_failure;
f92970c6 3335 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,
6700acc5 3336 params->timeout, DEVLINK_ATTR_PAD))
f92970c6 3337 goto nla_put_failure;
191ed202
JP		 3338
3339out:
3340 genlmsg_end(msg, hdr);
3341 return 0;
3342
3343nla_put_failure:
3344 genlmsg_cancel(msg, hdr);
3345 return -EMSGSIZE;
3346}
3347
3348static void __devlink_flash_update_notify(struct devlink *devlink,
3349 enum devlink_command cmd,
6700acc5 3350 struct devlink_flash_notify *params)
191ed202
JP		 3351{
3352 struct sk_buff *msg;
3353 int err;
3354
3355 WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
3356 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
3357 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
3358
3359 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3360 if (!msg)
3361 return;
3362
6700acc5 3363 err = devlink_nl_flash_update_fill(msg, devlink, cmd, params);
191ed202
JP		 3364 if (err)
3365 goto out_free_msg;
3366
3367 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3368 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3369 return;
3370
3371out_free_msg:
3372 nlmsg_free(msg);
3373}
3374
3375void devlink_flash_update_begin_notify(struct devlink *devlink)
3376{
6700acc5
SN		 3377 struct devlink_flash_notify params = { 0 };
3378
191ed202
JP		 3379 __devlink_flash_update_notify(devlink,
3380 DEVLINK_CMD_FLASH_UPDATE,
6700acc5 3381 &params);
191ed202
JP		 3382}
3383EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
3384
3385void devlink_flash_update_end_notify(struct devlink *devlink)
3386{
6700acc5
SN		 3387 struct devlink_flash_notify params = { 0 };
3388
191ed202
JP		 3389 __devlink_flash_update_notify(devlink,
3390 DEVLINK_CMD_FLASH_UPDATE_END,
6700acc5 3391 &params);
191ed202
JP		 3392}
3393EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
3394
3395void devlink_flash_update_status_notify(struct devlink *devlink,
3396 const char *status_msg,
3397 const char *component,
3398 unsigned long done,
3399 unsigned long total)
3400{
6700acc5
SN		 3401 struct devlink_flash_notify params = {
3402 .status_msg = status_msg,
3403 .component = component,
3404 .done = done,
3405 .total = total,
3406 };
3407
191ed202
JP		 3408 __devlink_flash_update_notify(devlink,
3409 DEVLINK_CMD_FLASH_UPDATE_STATUS,
6700acc5 3410 &params);
191ed202
JP		 3411}
3412EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
3413
f92970c6
SN		 3414void devlink_flash_update_timeout_notify(struct devlink *devlink,
3415 const char *status_msg,
3416 const char *component,
3417 unsigned long timeout)
3418{
6700acc5
SN		 3419 struct devlink_flash_notify params = {
3420 .status_msg = status_msg,
3421 .component = component,
3422 .timeout = timeout,
3423 };
3424
f92970c6
SN		 3425 __devlink_flash_update_notify(devlink,
3426 DEVLINK_CMD_FLASH_UPDATE_STATUS,
6700acc5 3427 &params);
f92970c6
SN		 3428}
3429EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
3430
76726ccb
JK		 3431static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
3432 struct genl_info *info)
3433{
5d5b4128 3434 struct nlattr *nla_component, *nla_overwrite_mask;
bc75c054 3435 struct devlink_flash_update_params params = {};
76726ccb 3436 struct devlink *devlink = info->user_ptr[0];
22ec3d23 3437 u32 supported_params;
76726ccb
JK		 3438
3439 if (!devlink->ops->flash_update)
3440 return -EOPNOTSUPP;
3441
3442 if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
3443 return -EINVAL;
22ec3d23
JK		 3444
3445 supported_params = devlink->ops->supported_flash_update_params;
3446
bc75c054 3447 params.file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
76726ccb
JK		 3448
3449 nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
22ec3d23
JK		 3450 if (nla_component) {
3451 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) {
3452 NL_SET_ERR_MSG_ATTR(info->extack, nla_component,
3453 "component update is not supported by this device");
3454 return -EOPNOTSUPP;
3455 }
bc75c054 3456 params.component = nla_data(nla_component);
22ec3d23 3457 }
76726ccb 3458
5d5b4128
JK		 3459 nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK];
3460 if (nla_overwrite_mask) {
3461 struct nla_bitfield32 sections;
3462
3463 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) {
3464 NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask,
3465 "overwrite settings are not supported by this device");
3466 return -EOPNOTSUPP;
3467 }
3468 sections = nla_get_bitfield32(nla_overwrite_mask);
3469 params.overwrite_mask = sections.value & sections.selector;
3470 }
3471
bc75c054 3472 return devlink->ops->flash_update(devlink, &params, info->extack);
76726ccb
JK		 3473}
3474
036467c3
MS		 3475static const struct devlink_param devlink_param_generic[] = {
3476 {
3477 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
3478 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
3479 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
3480 },
3481 {
3482 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
3483 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
3484 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
3485 },
f567bcda
VV		 3486 {
3487 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
3488 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
3489 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
3490 },
f6a69885
AV		 3491 {
3492 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
3493 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
3494 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
3495 },
e3b51061
VV		 3496 {
3497 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
3498 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
3499 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
3500 },
f61cba42
VV		 3501 {
3502 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
3503 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
3504 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
3505 },
16511789
VV		 3506 {
3507 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
3508 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
3509 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
3510 },
846e980a
ST		 3511 {
3512 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
3513 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
3514 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3515 },
5bbd21df
DM		 3516 {
3517 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3518 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3519 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3520 },
6c7295e1
MG		 3521 {
3522 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
3523 .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
3524 .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
3525 },
195d9dec
MS		 3526 {
3527 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,
3528 .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME,
3529 .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE,
3530 },
036467c3 3531};
eabaef18
MS		 3532
3533static int devlink_param_generic_verify(const struct devlink_param *param)
3534{
3535 /* verify it match generic parameter by id and name */
3536 if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3537 return -EINVAL;
3538 if (strcmp(param->name, devlink_param_generic[param->id].name))
3539 return -ENOENT;
3540
3541 WARN_ON(param->type != devlink_param_generic[param->id].type);
3542
3543 return 0;
3544}
3545
3546static int devlink_param_driver_verify(const struct devlink_param *param)
3547{
3548 int i;
3549
3550 if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3551 return -EINVAL;
3552 /* verify no such name in generic params */
3553 for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3554 if (!strcmp(param->name, devlink_param_generic[i].name))
3555 return -EEXIST;
3556
3557 return 0;
3558}
3559
3560static struct devlink_param_item *
3561devlink_param_find_by_name(struct list_head *param_list,
3562 const char *param_name)
3563{
3564 struct devlink_param_item *param_item;
3565
3566 list_for_each_entry(param_item, param_list, list)
3567 if (!strcmp(param_item->param->name, param_name))
3568 return param_item;
3569 return NULL;
3570}
3571
ec01aeb1
MS		 3572static struct devlink_param_item *
3573devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3574{
3575 struct devlink_param_item *param_item;
3576
3577 list_for_each_entry(param_item, param_list, list)
3578 if (param_item->param->id == param_id)
3579 return param_item;
3580 return NULL;
3581}
3582
45f05def
MS		 3583static bool
3584devlink_param_cmode_is_supported(const struct devlink_param *param,
3585 enum devlink_param_cmode cmode)
3586{
3587 return test_bit(cmode, &param->supported_cmodes);
3588}
3589
3590static int devlink_param_get(struct devlink *devlink,
3591 const struct devlink_param *param,
3592 struct devlink_param_gset_ctx *ctx)
3593{
3594 if (!param->get)
3595 return -EOPNOTSUPP;
3596 return param->get(devlink, param->id, ctx);
3597}
3598
e3b7ca18
MS		 3599static int devlink_param_set(struct devlink *devlink,
3600 const struct devlink_param *param,
3601 struct devlink_param_gset_ctx *ctx)
3602{
3603 if (!param->set)
3604 return -EOPNOTSUPP;
3605 return param->set(devlink, param->id, ctx);
3606}
3607
45f05def
MS		 3608static int
3609devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3610{
3611 switch (param_type) {
3612 case DEVLINK_PARAM_TYPE_U8:
3613 return NLA_U8;
3614 case DEVLINK_PARAM_TYPE_U16:
3615 return NLA_U16;
3616 case DEVLINK_PARAM_TYPE_U32:
3617 return NLA_U32;
3618 case DEVLINK_PARAM_TYPE_STRING:
3619 return NLA_STRING;
3620 case DEVLINK_PARAM_TYPE_BOOL:
3621 return NLA_FLAG;
3622 default:
3623 return -EINVAL;
3624 }
3625}
3626
3627static int
3628devlink_nl_param_value_fill_one(struct sk_buff *msg,
3629 enum devlink_param_type type,
3630 enum devlink_param_cmode cmode,
3631 union devlink_param_value val)
3632{
3633 struct nlattr *param_value_attr;
3634
ae0be8de
MK		 3635 param_value_attr = nla_nest_start_noflag(msg,
3636 DEVLINK_ATTR_PARAM_VALUE);
45f05def
MS		 3637 if (!param_value_attr)
3638 goto nla_put_failure;
3639
3640 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3641 goto value_nest_cancel;
3642
3643 switch (type) {
3644 case DEVLINK_PARAM_TYPE_U8:
3645 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3646 goto value_nest_cancel;
3647 break;
3648 case DEVLINK_PARAM_TYPE_U16:
3649 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3650 goto value_nest_cancel;
3651 break;
3652 case DEVLINK_PARAM_TYPE_U32:
3653 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3654 goto value_nest_cancel;
3655 break;
3656 case DEVLINK_PARAM_TYPE_STRING:
3657 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3658 val.vstr))
3659 goto value_nest_cancel;
3660 break;
3661 case DEVLINK_PARAM_TYPE_BOOL:
3662 if (val.vbool &&
3663 nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3664 goto value_nest_cancel;
3665 break;
3666 }
3667
3668 nla_nest_end(msg, param_value_attr);
3669 return 0;
3670
3671value_nest_cancel:
3672 nla_nest_cancel(msg, param_value_attr);
3673nla_put_failure:
3674 return -EMSGSIZE;
3675}
3676
3677static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
f4601dee 3678 unsigned int port_index,
45f05def
MS		 3679 struct devlink_param_item *param_item,
3680 enum devlink_command cmd,
3681 u32 portid, u32 seq, int flags)
3682{
3683 union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
7c62cfb8 3684 bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
45f05def
MS		 3685 const struct devlink_param *param = param_item->param;
3686 struct devlink_param_gset_ctx ctx;
3687 struct nlattr *param_values_list;
3688 struct nlattr *param_attr;
3689 int nla_type;
3690 void *hdr;
3691 int err;
3692 int i;
3693
3694 /* Get value from driver part to driverinit configuration mode */
3695 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3696 if (!devlink_param_cmode_is_supported(param, i))
3697 continue;
3698 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3699 if (!param_item->driverinit_value_valid)
3700 return -EOPNOTSUPP;
3701 param_value[i] = param_item->driverinit_value;
3702 } else {
7c62cfb8
JP		 3703 if (!param_item->published)
3704 continue;
45f05def
MS		 3705 ctx.cmode = i;
3706 err = devlink_param_get(devlink, param, &ctx);
3707 if (err)
3708 return err;
3709 param_value[i] = ctx.val;
3710 }
7c62cfb8 3711 param_value_set[i] = true;
45f05def
MS		 3712 }
3713
3714 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3715 if (!hdr)
3716 return -EMSGSIZE;
3717
3718 if (devlink_nl_put_handle(msg, devlink))
3719 goto genlmsg_cancel;
f4601dee 3720
c1e5786d
VV		 3721 if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3722 cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3723 cmd == DEVLINK_CMD_PORT_PARAM_DEL)
f4601dee
VV		 3724 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3725 goto genlmsg_cancel;
3726
ae0be8de 3727 param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
45f05def
MS		 3728 if (!param_attr)
3729 goto genlmsg_cancel;
3730 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3731 goto param_nest_cancel;
3732 if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3733 goto param_nest_cancel;
3734
3735 nla_type = devlink_param_type_to_nla_type(param->type);
3736 if (nla_type < 0)
3737 goto param_nest_cancel;
3738 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3739 goto param_nest_cancel;
3740
ae0be8de
MK		 3741 param_values_list = nla_nest_start_noflag(msg,
3742 DEVLINK_ATTR_PARAM_VALUES_LIST);
45f05def
MS		 3743 if (!param_values_list)
3744 goto param_nest_cancel;
3745
3746 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
7c62cfb8 3747 if (!param_value_set[i])
45f05def
MS		 3748 continue;
3749 err = devlink_nl_param_value_fill_one(msg, param->type,
3750 i, param_value[i]);
3751 if (err)
3752 goto values_list_nest_cancel;
3753 }
3754
3755 nla_nest_end(msg, param_values_list);
3756 nla_nest_end(msg, param_attr);
3757 genlmsg_end(msg, hdr);
3758 return 0;
3759
3760values_list_nest_cancel:
3761 nla_nest_end(msg, param_values_list);
3762param_nest_cancel:
3763 nla_nest_cancel(msg, param_attr);
3764genlmsg_cancel:
3765 genlmsg_cancel(msg, hdr);
3766 return -EMSGSIZE;
3767}
3768
ea601e17 3769static void devlink_param_notify(struct devlink *devlink,
c1e5786d 3770 unsigned int port_index,
ea601e17
MS		 3771 struct devlink_param_item *param_item,
3772 enum devlink_command cmd)
3773{
3774 struct sk_buff *msg;
3775 int err;
3776
c1e5786d
VV		 3777 WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3778 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3779 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
ea601e17
MS		 3780
3781 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3782 if (!msg)
3783 return;
c1e5786d
VV		 3784 err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3785 0, 0, 0);
ea601e17
MS		 3786 if (err) {
3787 nlmsg_free(msg);
3788 return;
3789 }
3790
3791 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3792 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3793}
3794
45f05def
MS		 3795static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3796 struct netlink_callback *cb)
3797{
3798 struct devlink_param_item *param_item;
3799 struct devlink *devlink;
3800 int start = cb->args[0];
3801 int idx = 0;
c62c2cfb 3802 int err = 0;
45f05def
MS		 3803
3804 mutex_lock(&devlink_mutex);
3805 list_for_each_entry(devlink, &devlink_list, list) {
3806 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3807 continue;
3808 mutex_lock(&devlink->lock);
3809 list_for_each_entry(param_item, &devlink->param_list, list) {
3810 if (idx < start) {
3811 idx++;
3812 continue;
3813 }
f4601dee 3814 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
45f05def
MS		 3815 DEVLINK_CMD_PARAM_GET,
3816 NETLINK_CB(cb->skb).portid,
3817 cb->nlh->nlmsg_seq,
3818 NLM_F_MULTI);
82274d07
JK		 3819 if (err == -EOPNOTSUPP) {
3820 err = 0;
3821 } else if (err) {
45f05def
MS		 3822 mutex_unlock(&devlink->lock);
3823 goto out;
3824 }
3825 idx++;
3826 }
3827 mutex_unlock(&devlink->lock);
3828 }
3829out:
3830 mutex_unlock(&devlink_mutex);
3831
c62c2cfb
JP		 3832 if (err != -EMSGSIZE)
3833 return err;
3834
45f05def
MS		 3835 cb->args[0] = idx;
3836 return msg->len;
3837}
3838
e3b7ca18
MS		 3839static int
3840devlink_param_type_get_from_info(struct genl_info *info,
3841 enum devlink_param_type *param_type)
3842{
3843 if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3844 return -EINVAL;
3845
3846 switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3847 case NLA_U8:
3848 *param_type = DEVLINK_PARAM_TYPE_U8;
3849 break;
3850 case NLA_U16:
3851 *param_type = DEVLINK_PARAM_TYPE_U16;
3852 break;
3853 case NLA_U32:
3854 *param_type = DEVLINK_PARAM_TYPE_U32;
3855 break;
3856 case NLA_STRING:
3857 *param_type = DEVLINK_PARAM_TYPE_STRING;
3858 break;
3859 case NLA_FLAG:
3860 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3861 break;
3862 default:
3863 return -EINVAL;
3864 }
3865
3866 return 0;
3867}
3868
3869static int
3870devlink_param_value_get_from_info(const struct devlink_param *param,
3871 struct genl_info *info,
3872 union devlink_param_value *value)
3873{
8750939b 3874 struct nlattr *param_data;
f355cfcd
MS		 3875 int len;
3876
8750939b
JK		 3877 param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
3878
3879 if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
e3b7ca18
MS		 3880 return -EINVAL;
3881
3882 switch (param->type) {
3883 case DEVLINK_PARAM_TYPE_U8:
8750939b
JK		 3884 if (nla_len(param_data) != sizeof(u8))
3885 return -EINVAL;
3886 value->vu8 = nla_get_u8(param_data);
e3b7ca18
MS		 3887 break;
3888 case DEVLINK_PARAM_TYPE_U16:
8750939b
JK		 3889 if (nla_len(param_data) != sizeof(u16))
3890 return -EINVAL;
3891 value->vu16 = nla_get_u16(param_data);
e3b7ca18
MS		 3892 break;
3893 case DEVLINK_PARAM_TYPE_U32:
8750939b
JK		 3894 if (nla_len(param_data) != sizeof(u32))
3895 return -EINVAL;
3896 value->vu32 = nla_get_u32(param_data);
e3b7ca18
MS		 3897 break;
3898 case DEVLINK_PARAM_TYPE_STRING:
8750939b
JK		 3899 len = strnlen(nla_data(param_data), nla_len(param_data));
3900 if (len == nla_len(param_data) ||
bde74ad1 3901 len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
e3b7ca18 3902 return -EINVAL;
8750939b 3903 strcpy(value->vstr, nla_data(param_data));
e3b7ca18
MS		 3904 break;
3905 case DEVLINK_PARAM_TYPE_BOOL:
8750939b
JK		 3906 if (param_data && nla_len(param_data))
3907 return -EINVAL;
3908 value->vbool = nla_get_flag(param_data);
e3b7ca18
MS		 3909 break;
3910 }
3911 return 0;
3912}
3913
45f05def 3914static struct devlink_param_item *
f4601dee 3915devlink_param_get_from_info(struct list_head *param_list,
45f05def
MS		 3916 struct genl_info *info)
3917{
3918 char *param_name;
3919
3920 if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3921 return NULL;
3922
3923 param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
f4601dee 3924 return devlink_param_find_by_name(param_list, param_name);
45f05def
MS		 3925}
3926
3927static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3928 struct genl_info *info)
3929{
3930 struct devlink *devlink = info->user_ptr[0];
3931 struct devlink_param_item *param_item;
3932 struct sk_buff *msg;
3933 int err;
3934
f4601dee 3935 param_item = devlink_param_get_from_info(&devlink->param_list, info);
45f05def
MS		 3936 if (!param_item)
3937 return -EINVAL;
3938
3939 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3940 if (!msg)
3941 return -ENOMEM;
3942
f4601dee 3943 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
45f05def
MS		 3944 DEVLINK_CMD_PARAM_GET,
3945 info->snd_portid, info->snd_seq, 0);
3946 if (err) {
3947 nlmsg_free(msg);
3948 return err;
3949 }
3950
3951 return genlmsg_reply(msg, info);
3952}
3953
9c54873b 3954static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
c1e5786d 3955 unsigned int port_index,
9c54873b
VV		 3956 struct list_head *param_list,
3957 struct genl_info *info,
3958 enum devlink_command cmd)
e3b7ca18 3959{
e3b7ca18
MS		 3960 enum devlink_param_type param_type;
3961 struct devlink_param_gset_ctx ctx;
3962 enum devlink_param_cmode cmode;
3963 struct devlink_param_item *param_item;
3964 const struct devlink_param *param;
3965 union devlink_param_value value;
3966 int err = 0;
3967
9c54873b 3968 param_item = devlink_param_get_from_info(param_list, info);
e3b7ca18
MS		 3969 if (!param_item)
3970 return -EINVAL;
3971 param = param_item->param;
3972 err = devlink_param_type_get_from_info(info, &param_type);
3973 if (err)
3974 return err;
3975 if (param_type != param->type)
3976 return -EINVAL;
3977 err = devlink_param_value_get_from_info(param, info, &value);
3978 if (err)
3979 return err;
3980 if (param->validate) {
3981 err = param->validate(devlink, param->id, value, info->extack);
3982 if (err)
3983 return err;
3984 }
3985
3986 if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3987 return -EINVAL;
3988 cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3989 if (!devlink_param_cmode_is_supported(param, cmode))
3990 return -EOPNOTSUPP;
3991
3992 if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
1276534c
MS		 3993 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3994 strcpy(param_item->driverinit_value.vstr, value.vstr);
3995 else
3996 param_item->driverinit_value = value;
e3b7ca18
MS		 3997 param_item->driverinit_value_valid = true;
3998 } else {
3999 if (!param->set)
4000 return -EOPNOTSUPP;
4001 ctx.val = value;
4002 ctx.cmode = cmode;
4003 err = devlink_param_set(devlink, param, &ctx);
4004 if (err)
4005 return err;
4006 }
4007
c1e5786d 4008 devlink_param_notify(devlink, port_index, param_item, cmd);
e3b7ca18
MS		 4009 return 0;
4010}
4011
9c54873b
VV		 4012static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
4013 struct genl_info *info)
4014{
4015 struct devlink *devlink = info->user_ptr[0];
4016
c1e5786d 4017 return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
9c54873b
VV		 4018 info, DEVLINK_CMD_PARAM_NEW);
4019}
4020
eabaef18 4021static int devlink_param_register_one(struct devlink *devlink,
c1e5786d 4022 unsigned int port_index,
39e6160e 4023 struct list_head *param_list,
c1e5786d
VV		 4024 const struct devlink_param *param,
4025 enum devlink_command cmd)
eabaef18
MS		 4026{
4027 struct devlink_param_item *param_item;
4028
39e6160e 4029 if (devlink_param_find_by_name(param_list, param->name))
eabaef18
MS		 4030 return -EEXIST;
4031
4032 if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
4033 WARN_ON(param->get || param->set);
4034 else
4035 WARN_ON(!param->get || !param->set);
4036
4037 param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
4038 if (!param_item)
4039 return -ENOMEM;
4040 param_item->param = param;
4041
39e6160e 4042 list_add_tail(&param_item->list, param_list);
c1e5786d 4043 devlink_param_notify(devlink, port_index, param_item, cmd);
eabaef18
MS		 4044 return 0;
4045}
4046
4047static void devlink_param_unregister_one(struct devlink *devlink,
c1e5786d 4048 unsigned int port_index,
39e6160e 4049 struct list_head *param_list,
c1e5786d
VV		 4050 const struct devlink_param *param,
4051 enum devlink_command cmd)
eabaef18
MS		 4052{
4053 struct devlink_param_item *param_item;
4054
39e6160e 4055 param_item = devlink_param_find_by_name(param_list, param->name);
eabaef18 4056 WARN_ON(!param_item);
c1e5786d 4057 devlink_param_notify(devlink, port_index, param_item, cmd);
eabaef18
MS		 4058 list_del(&param_item->list);
4059 kfree(param_item);
4060}
4061
f4601dee
VV		 4062static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
4063 struct netlink_callback *cb)
4064{
4065 struct devlink_param_item *param_item;
4066 struct devlink_port *devlink_port;
4067 struct devlink *devlink;
4068 int start = cb->args[0];
4069 int idx = 0;
c62c2cfb 4070 int err = 0;
f4601dee
VV		 4071
4072 mutex_lock(&devlink_mutex);
4073 list_for_each_entry(devlink, &devlink_list, list) {
4074 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4075 continue;
4076 mutex_lock(&devlink->lock);
4077 list_for_each_entry(devlink_port, &devlink->port_list, list) {
4078 list_for_each_entry(param_item,
4079 &devlink_port->param_list, list) {
4080 if (idx < start) {
4081 idx++;
4082 continue;
4083 }
4084 err = devlink_nl_param_fill(msg,
4085 devlink_port->devlink,
4086 devlink_port->index, param_item,
4087 DEVLINK_CMD_PORT_PARAM_GET,
4088 NETLINK_CB(cb->skb).portid,
4089 cb->nlh->nlmsg_seq,
4090 NLM_F_MULTI);
82274d07
JK		 4091 if (err == -EOPNOTSUPP) {
4092 err = 0;
4093 } else if (err) {
f4601dee
VV		 4094 mutex_unlock(&devlink->lock);
4095 goto out;
4096 }
4097 idx++;
4098 }
4099 }
4100 mutex_unlock(&devlink->lock);
4101 }
4102out:
4103 mutex_unlock(&devlink_mutex);
4104
c62c2cfb
JP		 4105 if (err != -EMSGSIZE)
4106 return err;
4107
f4601dee
VV		 4108 cb->args[0] = idx;
4109 return msg->len;
4110}
4111
4112static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
4113 struct genl_info *info)
4114{
4115 struct devlink_port *devlink_port = info->user_ptr[0];
4116 struct devlink_param_item *param_item;
4117 struct sk_buff *msg;
4118 int err;
4119
4120 param_item = devlink_param_get_from_info(&devlink_port->param_list,
4121 info);
4122 if (!param_item)
4123 return -EINVAL;
4124
4125 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4126 if (!msg)
4127 return -ENOMEM;
4128
4129 err = devlink_nl_param_fill(msg, devlink_port->devlink,
4130 devlink_port->index, param_item,
4131 DEVLINK_CMD_PORT_PARAM_GET,
4132 info->snd_portid, info->snd_seq, 0);
4133 if (err) {
4134 nlmsg_free(msg);
4135 return err;
4136 }
4137
4138 return genlmsg_reply(msg, info);
4139}
4140
9c54873b
VV		 4141static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
4142 struct genl_info *info)
4143{
4144 struct devlink_port *devlink_port = info->user_ptr[0];
4145
4146 return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
c1e5786d
VV		 4147 devlink_port->index,
4148 &devlink_port->param_list, info,
4149 DEVLINK_CMD_PORT_PARAM_NEW);
9c54873b
VV		 4150}
4151
a006d467
AV		 4152static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
4153 struct devlink *devlink,
4154 struct devlink_snapshot *snapshot)
4155{
4156 struct nlattr *snap_attr;
4157 int err;
4158
ae0be8de 4159 snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
a006d467
AV		 4160 if (!snap_attr)
4161 return -EINVAL;
4162
4163 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
4164 if (err)
4165 goto nla_put_failure;
4166
4167 nla_nest_end(msg, snap_attr);
4168 return 0;
4169
4170nla_put_failure:
4171 nla_nest_cancel(msg, snap_attr);
4172 return err;
4173}
4174
4175static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
4176 struct devlink *devlink,
4177 struct devlink_region *region)
4178{
4179 struct devlink_snapshot *snapshot;
4180 struct nlattr *snapshots_attr;
4181 int err;
4182
ae0be8de
MK		 4183 snapshots_attr = nla_nest_start_noflag(msg,
4184 DEVLINK_ATTR_REGION_SNAPSHOTS);
a006d467
AV		 4185 if (!snapshots_attr)
4186 return -EINVAL;
4187
4188 list_for_each_entry(snapshot, &region->snapshot_list, list) {
4189 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
4190 if (err)
4191 goto nla_put_failure;
4192 }
4193
4194 nla_nest_end(msg, snapshots_attr);
4195 return 0;
4196
4197nla_put_failure:
4198 nla_nest_cancel(msg, snapshots_attr);
4199 return err;
4200}
4201
d8db7ea5
AV		 4202static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
4203 enum devlink_command cmd, u32 portid,
4204 u32 seq, int flags,
4205 struct devlink_region *region)
4206{
4207 void *hdr;
4208 int err;
4209
4210 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4211 if (!hdr)
4212 return -EMSGSIZE;
4213
4214 err = devlink_nl_put_handle(msg, devlink);
4215 if (err)
4216 goto nla_put_failure;
4217
6c211809
DC		 4218 if (region->port) {
4219 err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
4220 region->port->index);
4221 if (err)
544e7c33 4222 goto nla_put_failure;
6c211809 4223 }
544e7c33 4224
e8937681 4225 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name);
d8db7ea5
AV		 4226 if (err)
4227 goto nla_put_failure;
4228
4229 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
4230 region->size,
4231 DEVLINK_ATTR_PAD);
4232 if (err)
4233 goto nla_put_failure;
4234
a006d467
AV		 4235 err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
4236 if (err)
4237 goto nla_put_failure;
4238
d8db7ea5
AV		 4239 genlmsg_end(msg, hdr);
4240 return 0;
4241
4242nla_put_failure:
4243 genlmsg_cancel(msg, hdr);
4244 return err;
4245}
4246
dd86fec7
JK		 4247static struct sk_buff *
4248devlink_nl_region_notify_build(struct devlink_region *region,
4249 struct devlink_snapshot *snapshot,
4250 enum devlink_command cmd, u32 portid, u32 seq)
866319bb
AV		 4251{
4252 struct devlink *devlink = region->devlink;
4253 struct sk_buff *msg;
4254 void *hdr;
4255 int err;
4256
866319bb
AV		 4257
4258 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4259 if (!msg)
dd86fec7 4260 return ERR_PTR(-ENOMEM);
866319bb 4261
dd86fec7
JK		 4262 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd);
4263 if (!hdr) {
4264 err = -EMSGSIZE;
866319bb 4265 goto out_free_msg;
dd86fec7 4266 }
866319bb
AV		 4267
4268 err = devlink_nl_put_handle(msg, devlink);
4269 if (err)
4270 goto out_cancel_msg;
4271
6c211809
DC		 4272 if (region->port) {
4273 err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
4274 region->port->index);
4275 if (err)
544e7c33 4276 goto out_cancel_msg;
6c211809 4277 }
544e7c33 4278
866319bb 4279 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
e8937681 4280 region->ops->name);
866319bb
AV		 4281 if (err)
4282 goto out_cancel_msg;
4283
4284 if (snapshot) {
4285 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
4286 snapshot->id);
4287 if (err)
4288 goto out_cancel_msg;
4289 } else {
4290 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
4291 region->size, DEVLINK_ATTR_PAD);
4292 if (err)
4293 goto out_cancel_msg;
4294 }
4295 genlmsg_end(msg, hdr);
4296
dd86fec7 4297 return msg;
866319bb
AV		 4298
4299out_cancel_msg:
4300 genlmsg_cancel(msg, hdr);
4301out_free_msg:
4302 nlmsg_free(msg);
dd86fec7
JK		 4303 return ERR_PTR(err);
4304}
4305
4306static void devlink_nl_region_notify(struct devlink_region *region,
4307 struct devlink_snapshot *snapshot,
4308 enum devlink_command cmd)
4309{
4310 struct devlink *devlink = region->devlink;
4311 struct sk_buff *msg;
4312
4313 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
4314
4315 msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);
4316 if (IS_ERR(msg))
4317 return;
4318
4319 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
4320 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
866319bb
AV		 4321}
4322
12102436
JK		 4323/**
4324 * __devlink_snapshot_id_increment - Increment number of snapshots using an id
4325 * @devlink: devlink instance
4326 * @id: the snapshot id
4327 *
4328 * Track when a new snapshot begins using an id. Load the count for the
4329 * given id from the snapshot xarray, increment it, and store it back.
4330 *
4331 * Called when a new snapshot is created with the given id.
4332 *
4333 * The id *must* have been previously allocated by
4334 * devlink_region_snapshot_id_get().
4335 *
4336 * Returns 0 on success, or an error on failure.
4337 */
4338static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
4339{
4340 unsigned long count;
4341 void *p;
4342
4343 lockdep_assert_held(&devlink->lock);
4344
4345 p = xa_load(&devlink->snapshot_ids, id);
4346 if (WARN_ON(!p))
4347 return -EINVAL;
4348
4349 if (WARN_ON(!xa_is_value(p)))
4350 return -EINVAL;
4351
4352 count = xa_to_value(p);
4353 count++;
4354
4355 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
4356 GFP_KERNEL));
4357}
4358
4359/**
4360 * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id
4361 * @devlink: devlink instance
4362 * @id: the snapshot id
4363 *
4364 * Track when a snapshot is deleted and stops using an id. Load the count
4365 * for the given id from the snapshot xarray, decrement it, and store it
4366 * back.
4367 *
4368 * If the count reaches zero, erase this id from the xarray, freeing it
4369 * up for future re-use by devlink_region_snapshot_id_get().
4370 *
4371 * Called when a snapshot using the given id is deleted, and when the
4372 * initial allocator of the id is finished using it.
4373 */
4374static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
4375{
4376 unsigned long count;
4377 void *p;
4378
4379 lockdep_assert_held(&devlink->lock);
4380
4381 p = xa_load(&devlink->snapshot_ids, id);
4382 if (WARN_ON(!p))
4383 return;
4384
4385 if (WARN_ON(!xa_is_value(p)))
4386 return;
4387
4388 count = xa_to_value(p);
4389
4390 if (count > 1) {
4391 count--;
4392 xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
4393 GFP_KERNEL);
4394 } else {
4395 /* If this was the last user, we can erase this id */
4396 xa_erase(&devlink->snapshot_ids, id);
4397 }
4398}
4399
b9a17abf
JK		 4400/**
4401 * __devlink_snapshot_id_insert - Insert a specific snapshot ID
4402 * @devlink: devlink instance
4403 * @id: the snapshot id
4404 *
4405 * Mark the given snapshot id as used by inserting a zero value into the
4406 * snapshot xarray.
4407 *
4408 * This must be called while holding the devlink instance lock. Unlike
4409 * devlink_snapshot_id_get, the initial reference count is zero, not one.
4410 * It is expected that the id will immediately be used before
4411 * releasing the devlink instance lock.
4412 *
4413 * Returns zero on success, or an error code if the snapshot id could not
4414 * be inserted.
4415 */
4416static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
4417{
4418 lockdep_assert_held(&devlink->lock);
4419
bd71ea60 4420 if (xa_load(&devlink->snapshot_ids, id))
b9a17abf
JK		 4421 return -EEXIST;
4422
4423 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
4424 GFP_KERNEL));
4425}
4426
7000108f
JK		 4427/**
4428 * __devlink_region_snapshot_id_get - get snapshot ID
4429 * @devlink: devlink instance
7ef19d3b 4430 * @id: storage to return snapshot id
7000108f 4431 *
7ef19d3b
JK		 4432 * Allocates a new snapshot id. Returns zero on success, or a negative
4433 * error on failure. Must be called while holding the devlink instance
4434 * lock.
12102436
JK		 4435 *
4436 * Snapshot IDs are tracked using an xarray which stores the number of
4437 * users of the snapshot id.
4438 *
4439 * Note that the caller of this function counts as a 'user', in order to
4440 * avoid race conditions. The caller must release its hold on the
4441 * snapshot by using devlink_region_snapshot_id_put.
7000108f 4442 */
7ef19d3b 4443static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
7000108f
JK		 4444{
4445 lockdep_assert_held(&devlink->lock);
7ef19d3b 4446
12102436
JK		 4447 return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
4448 xa_limit_32b, GFP_KERNEL);
7000108f
JK		 4449}
4450
cf80faee
JK		 4451/**
4452 * __devlink_region_snapshot_create - create a new snapshot
4453 * This will add a new snapshot of a region. The snapshot
4454 * will be stored on the region struct and can be accessed
4455 * from devlink. This is useful for future analyses of snapshots.
4456 * Multiple snapshots can be created on a region.
4457 * The @snapshot_id should be obtained using the getter function.
4458 *
4459 * Must be called only while holding the devlink instance lock.
4460 *
4461 * @region: devlink region of the snapshot
4462 * @data: snapshot data
4463 * @snapshot_id: snapshot id to be created
4464 */
4465static int
4466__devlink_region_snapshot_create(struct devlink_region *region,
4467 u8 *data, u32 snapshot_id)
4468{
4469 struct devlink *devlink = region->devlink;
4470 struct devlink_snapshot *snapshot;
12102436 4471 int err;
cf80faee
JK		 4472
4473 lockdep_assert_held(&devlink->lock);
4474
4475 /* check if region can hold one more snapshot */
4476 if (region->cur_snapshots == region->max_snapshots)
47a39f61 4477 return -ENOSPC;
cf80faee
JK		 4478
4479 if (devlink_region_snapshot_get_by_id(region, snapshot_id))
4480 return -EEXIST;
4481
4482 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
4483 if (!snapshot)
4484 return -ENOMEM;
4485
12102436
JK		 4486 err = __devlink_snapshot_id_increment(devlink, snapshot_id);
4487 if (err)
4488 goto err_snapshot_id_increment;
4489
cf80faee
JK		 4490 snapshot->id = snapshot_id;
4491 snapshot->region = region;
4492 snapshot->data = data;
4493
4494 list_add_tail(&snapshot->list, &region->snapshot_list);
4495
4496 region->cur_snapshots++;
4497
4498 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
4499 return 0;
12102436
JK		 4500
4501err_snapshot_id_increment:
4502 kfree(snapshot);
4503 return err;
cf80faee
JK		 4504}
4505
92b49822
JP		 4506static void devlink_region_snapshot_del(struct devlink_region *region,
4507 struct devlink_snapshot *snapshot)
4508{
12102436
JK		 4509 struct devlink *devlink = region->devlink;
4510
4511 lockdep_assert_held(&devlink->lock);
4512
92b49822
JP		 4513 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
4514 region->cur_snapshots--;
4515 list_del(&snapshot->list);
a0a09f6b 4516 region->ops->destructor(snapshot->data);
12102436 4517 __devlink_snapshot_id_decrement(devlink, snapshot->id);
92b49822
JP		 4518 kfree(snapshot);
4519}
4520
d8db7ea5
AV		 4521static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
4522 struct genl_info *info)
4523{
4524 struct devlink *devlink = info->user_ptr[0];
544e7c33 4525 struct devlink_port *port = NULL;
d8db7ea5
AV		 4526 struct devlink_region *region;
4527 const char *region_name;
4528 struct sk_buff *msg;
544e7c33 4529 unsigned int index;
d8db7ea5
AV		 4530 int err;
4531
4532 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
4533 return -EINVAL;
4534
544e7c33
AL		 4535 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4536 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4537
4538 port = devlink_port_get_by_index(devlink, index);
4539 if (!port)
4540 return -ENODEV;
4541 }
4542
d8db7ea5 4543 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
544e7c33
AL		 4544 if (port)
4545 region = devlink_port_region_get_by_name(port, region_name);
4546 else
4547 region = devlink_region_get_by_name(devlink, region_name);
4548
d8db7ea5
AV		 4549 if (!region)
4550 return -EINVAL;
4551
4552 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4553 if (!msg)
4554 return -ENOMEM;
4555
4556 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
4557 info->snd_portid, info->snd_seq, 0,
4558 region);
4559 if (err) {
4560 nlmsg_free(msg);
4561 return err;
4562 }
4563
4564 return genlmsg_reply(msg, info);
4565}
4566
544e7c33
AL		 4567static int devlink_nl_cmd_region_get_port_dumpit(struct sk_buff *msg,
4568 struct netlink_callback *cb,
4569 struct devlink_port *port,
4570 int *idx,
4571 int start)
4572{
4573 struct devlink_region *region;
4574 int err = 0;
4575
4576 list_for_each_entry(region, &port->region_list, list) {
4577 if (*idx < start) {
4578 (*idx)++;
4579 continue;
4580 }
4581 err = devlink_nl_region_fill(msg, port->devlink,
4582 DEVLINK_CMD_REGION_GET,
4583 NETLINK_CB(cb->skb).portid,
4584 cb->nlh->nlmsg_seq,
4585 NLM_F_MULTI, region);
4586 if (err)
4587 goto out;
4588 (*idx)++;
4589 }
4590
4591out:
4592 return err;
4593}
4594
4595static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg,
4596 struct netlink_callback *cb,
4597 struct devlink *devlink,
4598 int *idx,
4599 int start)
4600{
4601 struct devlink_region *region;
4602 struct devlink_port *port;
4603 int err = 0;
4604
4605 mutex_lock(&devlink->lock);
4606 list_for_each_entry(region, &devlink->region_list, list) {
4607 if (*idx < start) {
4608 (*idx)++;
4609 continue;
4610 }
4611 err = devlink_nl_region_fill(msg, devlink,
4612 DEVLINK_CMD_REGION_GET,
4613 NETLINK_CB(cb->skb).portid,
4614 cb->nlh->nlmsg_seq,
4615 NLM_F_MULTI, region);
4616 if (err)
4617 goto out;
4618 (*idx)++;
4619 }
4620
4621 list_for_each_entry(port, &devlink->port_list, list) {
4622 err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, idx,
4623 start);
4624 if (err)
4625 goto out;
4626 }
4627
4628out:
4629 mutex_unlock(&devlink->lock);
4630 return err;
4631}
4632
d8db7ea5
AV		 4633static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
4634 struct netlink_callback *cb)
4635{
d8db7ea5
AV		 4636 struct devlink *devlink;
4637 int start = cb->args[0];
4638 int idx = 0;
4639 int err;
4640
4641 mutex_lock(&devlink_mutex);
4642 list_for_each_entry(devlink, &devlink_list, list) {
4643 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4644 continue;
544e7c33
AL		 4645 err = devlink_nl_cmd_region_get_devlink_dumpit(msg, cb, devlink,
4646 &idx, start);
4647 if (err)
4648 goto out;
d8db7ea5
AV		 4649 }
4650out:
4651 mutex_unlock(&devlink_mutex);
4652 cb->args[0] = idx;
4653 return msg->len;
4654}
4655
866319bb
AV		 4656static int devlink_nl_cmd_region_del(struct sk_buff *skb,
4657 struct genl_info *info)
4658{
4659 struct devlink *devlink = info->user_ptr[0];
4660 struct devlink_snapshot *snapshot;
544e7c33 4661 struct devlink_port *port = NULL;
866319bb
AV		 4662 struct devlink_region *region;
4663 const char *region_name;
544e7c33 4664 unsigned int index;
866319bb
AV		 4665 u32 snapshot_id;
4666
4667 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
4668 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
4669 return -EINVAL;
4670
4671 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4672 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4673
544e7c33
AL		 4674 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4675 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4676
4677 port = devlink_port_get_by_index(devlink, index);
4678 if (!port)
4679 return -ENODEV;
4680 }
4681
4682 if (port)
4683 region = devlink_port_region_get_by_name(port, region_name);
4684 else
4685 region = devlink_region_get_by_name(devlink, region_name);
4686
866319bb
AV		 4687 if (!region)
4688 return -EINVAL;
4689
4690 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4691 if (!snapshot)
4692 return -EINVAL;
4693
92b49822 4694 devlink_region_snapshot_del(region, snapshot);
866319bb
AV		 4695 return 0;
4696}
4697
b9a17abf
JK		 4698static int
4699devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
4700{
4701 struct devlink *devlink = info->user_ptr[0];
043b3e22 4702 struct devlink_snapshot *snapshot;
544e7c33 4703 struct devlink_port *port = NULL;
043b3e22 4704 struct nlattr *snapshot_id_attr;
b9a17abf
JK		 4705 struct devlink_region *region;
4706 const char *region_name;
544e7c33 4707 unsigned int index;
b9a17abf
JK		 4708 u32 snapshot_id;
4709 u8 *data;
4710 int err;
4711
4712 if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) {
4713 NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
4714 return -EINVAL;
4715 }
4716
b9a17abf 4717 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
544e7c33
AL		 4718
4719 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4720 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4721
4722 port = devlink_port_get_by_index(devlink, index);
4723 if (!port)
4724 return -ENODEV;
4725 }
4726
4727 if (port)
4728 region = devlink_port_region_get_by_name(port, region_name);
4729 else
4730 region = devlink_region_get_by_name(devlink, region_name);
4731
b9a17abf
JK		 4732 if (!region) {
4733 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
4734 return -EINVAL;
4735 }
4736
4737 if (!region->ops->snapshot) {
4738 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
4739 return -EOPNOTSUPP;
4740 }
4741
4742 if (region->cur_snapshots == region->max_snapshots) {
4743 NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
4744 return -ENOSPC;
4745 }
4746
043b3e22
JK		 4747 snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID];
4748 if (snapshot_id_attr) {
4749 snapshot_id = nla_get_u32(snapshot_id_attr);
b9a17abf 4750
043b3e22
JK		 4751 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4752 NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
4753 return -EEXIST;
4754 }
b9a17abf 4755
043b3e22
JK		 4756 err = __devlink_snapshot_id_insert(devlink, snapshot_id);
4757 if (err)
4758 return err;
4759 } else {
4760 err = __devlink_region_snapshot_id_get(devlink, &snapshot_id);
4761 if (err) {
4762 NL_SET_ERR_MSG_MOD(info->extack, "Failed to allocate a new snapshot id");
4763 return err;
4764 }
4765 }
b9a17abf 4766
544e7c33
AL		 4767 if (port)
4768 err = region->port_ops->snapshot(port, region->port_ops,
4769 info->extack, &data);
4770 else
4771 err = region->ops->snapshot(devlink, region->ops,
4772 info->extack, &data);
b9a17abf
JK		 4773 if (err)
4774 goto err_snapshot_capture;
4775
4776 err = __devlink_region_snapshot_create(region, data, snapshot_id);
4777 if (err)
4778 goto err_snapshot_create;
4779
043b3e22
JK		 4780 if (!snapshot_id_attr) {
4781 struct sk_buff *msg;
4782
4783 snapshot = devlink_region_snapshot_get_by_id(region,
4784 snapshot_id);
4785 if (WARN_ON(!snapshot))
4786 return -EINVAL;
4787
4788 msg = devlink_nl_region_notify_build(region, snapshot,
4789 DEVLINK_CMD_REGION_NEW,
4790 info->snd_portid,
4791 info->snd_seq);
4792 err = PTR_ERR_OR_ZERO(msg);
4793 if (err)
4794 goto err_notify;
4795
4796 err = genlmsg_reply(msg, info);
4797 if (err)
4798 goto err_notify;
4799 }
4800
b9a17abf
JK		 4801 return 0;
4802
4803err_snapshot_create:
4804 region->ops->destructor(data);
4805err_snapshot_capture:
4806 __devlink_snapshot_id_decrement(devlink, snapshot_id);
4807 return err;
043b3e22
JK		 4808
4809err_notify:
4810 devlink_region_snapshot_del(region, snapshot);
4811 return err;
b9a17abf
JK		 4812}
4813
4e54795a
AV		 4814static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
4815 struct devlink *devlink,
4816 u8 *chunk, u32 chunk_size,
4817 u64 addr)
4818{
4819 struct nlattr *chunk_attr;
4820 int err;
4821
ae0be8de 4822 chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
4e54795a
AV		 4823 if (!chunk_attr)
4824 return -EINVAL;
4825
4826 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
4827 if (err)
4828 goto nla_put_failure;
4829
4830 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
4831 DEVLINK_ATTR_PAD);
4832 if (err)
4833 goto nla_put_failure;
4834
4835 nla_nest_end(msg, chunk_attr);
4836 return 0;
4837
4838nla_put_failure:
4839 nla_nest_cancel(msg, chunk_attr);
4840 return err;
4841}
4842
4843#define DEVLINK_REGION_READ_CHUNK_SIZE 256
4844
4845static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
4846 struct devlink *devlink,
4847 struct devlink_region *region,
4848 struct nlattr **attrs,
4849 u64 start_offset,
4850 u64 end_offset,
4e54795a
AV		 4851 u64 *new_offset)
4852{
4853 struct devlink_snapshot *snapshot;
4854 u64 curr_offset = start_offset;
4855 u32 snapshot_id;
4856 int err = 0;
4857
4858 *new_offset = start_offset;
4859
4860 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4861 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4862 if (!snapshot)
4863 return -EINVAL;
4864
4e54795a
AV		 4865 while (curr_offset < end_offset) {
4866 u32 data_size;
4867 u8 *data;
4868
4869 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
4870 data_size = end_offset - curr_offset;
4871 else
4872 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
4873
4874 data = &snapshot->data[curr_offset];
4875 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
4876 data, data_size,
4877 curr_offset);
4878 if (err)
4879 break;
4880
4881 curr_offset += data_size;
4882 }
4883 *new_offset = curr_offset;
4884
4885 return err;
4886}
4887
4888static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
4889 struct netlink_callback *cb)
4890{
ee85da53 4891 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5a46b062 4892 u64 ret_offset, start_offset, end_offset = U64_MAX;
ee85da53 4893 struct nlattr **attrs = info->attrs;
544e7c33 4894 struct devlink_port *port = NULL;
4e54795a
AV		 4895 struct devlink_region *region;
4896 struct nlattr *chunks_attr;
4897 const char *region_name;
4898 struct devlink *devlink;
544e7c33 4899 unsigned int index;
4e54795a
AV		 4900 void *hdr;
4901 int err;
4902
4903 start_offset = *((u64 *)&cb->args[0]);
4904
dac7c08f 4905 mutex_lock(&devlink_mutex);
4e54795a 4906 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
fdd41ec2
PP		 4907 if (IS_ERR(devlink)) {
4908 err = PTR_ERR(devlink);
dac7c08f 4909 goto out_dev;
fdd41ec2 4910 }
4e54795a 4911
4e54795a
AV		 4912 mutex_lock(&devlink->lock);
4913
4914 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
fdd41ec2
PP		 4915 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4916 err = -EINVAL;
4e54795a 4917 goto out_unlock;
fdd41ec2 4918 }
4e54795a 4919
544e7c33
AL		 4920 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4921 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4922
4923 port = devlink_port_get_by_index(devlink, index);
0d8cb946
DC		 4924 if (!port) {
4925 err = -ENODEV;
4926 goto out_unlock;
4927 }
544e7c33
AL		 4928 }
4929
4e54795a 4930 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
544e7c33
AL		 4931
4932 if (port)
4933 region = devlink_port_region_get_by_name(port, region_name);
4934 else
4935 region = devlink_region_get_by_name(devlink, region_name);
4936
fdd41ec2
PP		 4937 if (!region) {
4938 err = -EINVAL;
4e54795a 4939 goto out_unlock;
fdd41ec2 4940 }
4e54795a 4941
5a46b062
JK		 4942 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4943 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4944 if (!start_offset)
4945 start_offset =
4946 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4947
4948 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4949 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4950 }
4951
4952 if (end_offset > region->size)
4953 end_offset = region->size;
4954
d5b90e99 4955 /* return 0 if there is no further data to read */
5a46b062 4956 if (start_offset == end_offset) {
d5b90e99
JK		 4957 err = 0;
4958 goto out_unlock;
4959 }
4960
4e54795a
AV		 4961 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4962 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
4963 DEVLINK_CMD_REGION_READ);
fdd41ec2
PP		 4964 if (!hdr) {
4965 err = -EMSGSIZE;
4e54795a 4966 goto out_unlock;
fdd41ec2 4967 }
4e54795a
AV		 4968
4969 err = devlink_nl_put_handle(skb, devlink);
4970 if (err)
4971 goto nla_put_failure;
4972
6c211809
DC		 4973 if (region->port) {
4974 err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX,
4975 region->port->index);
4976 if (err)
544e7c33 4977 goto nla_put_failure;
6c211809 4978 }
544e7c33 4979
4e54795a
AV		 4980 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
4981 if (err)
4982 goto nla_put_failure;
4983
ae0be8de 4984 chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
fdd41ec2
PP		 4985 if (!chunks_attr) {
4986 err = -EMSGSIZE;
4e54795a 4987 goto nla_put_failure;
fdd41ec2 4988 }
4e54795a 4989
4e54795a
AV		 4990 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4991 region, attrs,
4992 start_offset,
5a46b062 4993 end_offset, &ret_offset);
4e54795a
AV		 4994
4995 if (err && err != -EMSGSIZE)
4996 goto nla_put_failure;
4997
4998 /* Check if there was any progress done to prevent infinite loop */
fdd41ec2
PP		 4999 if (ret_offset == start_offset) {
5000 err = -EINVAL;
4e54795a 5001 goto nla_put_failure;
fdd41ec2 5002 }
4e54795a
AV		 5003
5004 *((u64 *)&cb->args[0]) = ret_offset;
5005
5006 nla_nest_end(skb, chunks_attr);
5007 genlmsg_end(skb, hdr);
5008 mutex_unlock(&devlink->lock);
5009 mutex_unlock(&devlink_mutex);
5010
5011 return skb->len;
5012
5013nla_put_failure:
5014 genlmsg_cancel(skb, hdr);
5015out_unlock:
5016 mutex_unlock(&devlink->lock);
dac7c08f 5017out_dev:
4e54795a 5018 mutex_unlock(&devlink_mutex);
fdd41ec2 5019 return err;
4e54795a
AV		 5020}
5021
f9cf2288
JK		 5022struct devlink_info_req {
5023 struct sk_buff *msg;
5024};
5025
5026int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
5027{
5028 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
5029}
5030EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
5031
5032int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
5033{
5034 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
5035}
5036EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
5037
b5872cd0
VV		 5038int devlink_info_board_serial_number_put(struct devlink_info_req *req,
5039 const char *bsn)
5040{
5041 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER,
5042 bsn);
5043}
5044EXPORT_SYMBOL_GPL(devlink_info_board_serial_number_put);
5045
fc6fae7d
JK		 5046static int devlink_info_version_put(struct devlink_info_req *req, int attr,
5047 const char *version_name,
5048 const char *version_value)
5049{
5050 struct nlattr *nest;
5051 int err;
5052
ae0be8de 5053 nest = nla_nest_start_noflag(req->msg, attr);
fc6fae7d
JK		 5054 if (!nest)
5055 return -EMSGSIZE;
5056
5057 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
5058 version_name);
5059 if (err)
5060 goto nla_put_failure;
5061
5062 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
5063 version_value);
5064 if (err)
5065 goto nla_put_failure;
5066
5067 nla_nest_end(req->msg, nest);
5068
5069 return 0;
5070
5071nla_put_failure:
5072 nla_nest_cancel(req->msg, nest);
5073 return err;
5074}
5075
5076int devlink_info_version_fixed_put(struct devlink_info_req *req,
5077 const char *version_name,
5078 const char *version_value)
5079{
5080 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
5081 version_name, version_value);
5082}
5083EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
5084
5085int devlink_info_version_stored_put(struct devlink_info_req *req,
5086 const char *version_name,
5087 const char *version_value)
5088{
5089 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
5090 version_name, version_value);
5091}
5092EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
5093
5094int devlink_info_version_running_put(struct devlink_info_req *req,
5095 const char *version_name,
5096 const char *version_value)
5097{
5098 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
5099 version_name, version_value);
5100}
5101EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
5102
f9cf2288
JK		 5103static int
5104devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
5105 enum devlink_command cmd, u32 portid,
5106 u32 seq, int flags, struct netlink_ext_ack *extack)
5107{
5108 struct devlink_info_req req;
5109 void *hdr;
5110 int err;
5111
5112 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5113 if (!hdr)
5114 return -EMSGSIZE;
5115
5116 err = -EMSGSIZE;
5117 if (devlink_nl_put_handle(msg, devlink))
5118 goto err_cancel_msg;
5119
5120 req.msg = msg;
5121 err = devlink->ops->info_get(devlink, &req, extack);
5122 if (err)
5123 goto err_cancel_msg;
5124
5125 genlmsg_end(msg, hdr);
5126 return 0;
5127
5128err_cancel_msg:
5129 genlmsg_cancel(msg, hdr);
5130 return err;
5131}
5132
5133static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
5134 struct genl_info *info)
5135{
5136 struct devlink *devlink = info->user_ptr[0];
5137 struct sk_buff *msg;
5138 int err;
5139
be6fe1d8 5140 if (!devlink->ops->info_get)
f9cf2288
JK		 5141 return -EOPNOTSUPP;
5142
5143 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5144 if (!msg)
5145 return -ENOMEM;
5146
5147 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
5148 info->snd_portid, info->snd_seq, 0,
5149 info->extack);
5150 if (err) {
5151 nlmsg_free(msg);
5152 return err;
5153 }
5154
5155 return genlmsg_reply(msg, info);
5156}
5157
5158static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
5159 struct netlink_callback *cb)
5160{
5161 struct devlink *devlink;
5162 int start = cb->args[0];
5163 int idx = 0;
c62c2cfb 5164 int err = 0;
f9cf2288
JK		 5165
5166 mutex_lock(&devlink_mutex);
5167 list_for_each_entry(devlink, &devlink_list, list) {
5168 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5169 continue;
5170 if (idx < start) {
5171 idx++;
5172 continue;
5173 }
5174
c493b09b
JP		 5175 if (!devlink->ops->info_get) {
5176 idx++;
5177 continue;
5178 }
5179
f9cf2288
JK		 5180 mutex_lock(&devlink->lock);
5181 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
5182 NETLINK_CB(cb->skb).portid,
5183 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5184 cb->extack);
5185 mutex_unlock(&devlink->lock);
82274d07
JK		 5186 if (err == -EOPNOTSUPP)
5187 err = 0;
5188 else if (err)
f9cf2288
JK		 5189 break;
5190 idx++;
5191 }
5192 mutex_unlock(&devlink_mutex);
5193
c62c2cfb
JP		 5194 if (err != -EMSGSIZE)
5195 return err;
5196
f9cf2288
JK		 5197 cb->args[0] = idx;
5198 return msg->len;
5199}
5200
1db64e87
EBE		 5201struct devlink_fmsg_item {
5202 struct list_head list;
5203 int attrtype;
5204 u8 nla_type;
5205 u16 len;
d2afb41a 5206 int value[];
1db64e87
EBE		 5207};
5208
5209struct devlink_fmsg {
5210 struct list_head item_list;
573ed90a
AL		 5211 bool putting_binary; /* This flag forces enclosing of binary data
5212 * in an array brackets. It forces using
5213 * of designated API:
5214 * devlink_fmsg_binary_pair_nest_start()
5215 * devlink_fmsg_binary_pair_nest_end()
5216 */
1db64e87
EBE		 5217};
5218
5219static struct devlink_fmsg *devlink_fmsg_alloc(void)
5220{
5221 struct devlink_fmsg *fmsg;
5222
5223 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
5224 if (!fmsg)
5225 return NULL;
5226
5227 INIT_LIST_HEAD(&fmsg->item_list);
5228
5229 return fmsg;
5230}
5231
5232static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
5233{
5234 struct devlink_fmsg_item *item, *tmp;
5235
5236 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
5237 list_del(&item->list);
5238 kfree(item);
5239 }
5240 kfree(fmsg);
5241}
5242
5243static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
5244 int attrtype)
5245{
5246 struct devlink_fmsg_item *item;
5247
5248 item = kzalloc(sizeof(*item), GFP_KERNEL);
5249 if (!item)
5250 return -ENOMEM;
5251
5252 item->attrtype = attrtype;
5253 list_add_tail(&item->list, &fmsg->item_list);
5254
5255 return 0;
5256}
5257
5258int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
5259{
573ed90a
AL		 5260 if (fmsg->putting_binary)
5261 return -EINVAL;
5262
1db64e87
EBE		 5263 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
5264}
5265EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
5266
5267static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
5268{
573ed90a
AL		 5269 if (fmsg->putting_binary)
5270 return -EINVAL;
5271
1db64e87
EBE		 5272 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
5273}
5274
5275int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
5276{
573ed90a
AL		 5277 if (fmsg->putting_binary)
5278 return -EINVAL;
5279
1db64e87
EBE		 5280 return devlink_fmsg_nest_end(fmsg);
5281}
5282EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
5283
5284#define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
5285
5286static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
5287{
5288 struct devlink_fmsg_item *item;
5289
573ed90a
AL		 5290 if (fmsg->putting_binary)
5291 return -EINVAL;
5292
1db64e87
EBE		 5293 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
5294 return -EMSGSIZE;
5295
5296 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
5297 if (!item)
5298 return -ENOMEM;
5299
5300 item->nla_type = NLA_NUL_STRING;
5301 item->len = strlen(name) + 1;
5302 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
5303 memcpy(&item->value, name, item->len);
5304 list_add_tail(&item->list, &fmsg->item_list);
5305
5306 return 0;
5307}
5308
5309int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
5310{
5311 int err;
5312
573ed90a
AL		 5313 if (fmsg->putting_binary)
5314 return -EINVAL;
5315
1db64e87
EBE		 5316 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
5317 if (err)
5318 return err;
5319
5320 err = devlink_fmsg_put_name(fmsg, name);
5321 if (err)
5322 return err;
5323
5324 return 0;
5325}
5326EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
5327
5328int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
5329{
573ed90a
AL		 5330 if (fmsg->putting_binary)
5331 return -EINVAL;
5332
1db64e87
EBE		 5333 return devlink_fmsg_nest_end(fmsg);
5334}
5335EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
5336
5337int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
5338 const char *name)
5339{
5340 int err;
5341
573ed90a
AL		 5342 if (fmsg->putting_binary)
5343 return -EINVAL;
5344
1db64e87
EBE		 5345 err = devlink_fmsg_pair_nest_start(fmsg, name);
5346 if (err)
5347 return err;
5348
5349 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
5350 if (err)
5351 return err;
5352
5353 return 0;
5354}
5355EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
5356
5357int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
5358{
5359 int err;
5360
573ed90a
AL		 5361 if (fmsg->putting_binary)
5362 return -EINVAL;
5363
1db64e87
EBE		 5364 err = devlink_fmsg_nest_end(fmsg);
5365 if (err)
5366 return err;
5367
5368 err = devlink_fmsg_nest_end(fmsg);
5369 if (err)
5370 return err;
5371
5372 return 0;
5373}
5374EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
5375
573ed90a
AL		 5376int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
5377 const char *name)
5378{
5379 int err;
5380
5381 err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
5382 if (err)
5383 return err;
5384
5385 fmsg->putting_binary = true;
5386 return err;
5387}
5388EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
5389
5390int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
5391{
5392 if (!fmsg->putting_binary)
5393 return -EINVAL;
5394
5395 fmsg->putting_binary = false;
5396 return devlink_fmsg_arr_pair_nest_end(fmsg);
5397}
5398EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
5399
1db64e87
EBE		 5400static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
5401 const void *value, u16 value_len,
5402 u8 value_nla_type)
5403{
5404 struct devlink_fmsg_item *item;
5405
5406 if (value_len > DEVLINK_FMSG_MAX_SIZE)
5407 return -EMSGSIZE;
5408
5409 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
5410 if (!item)
5411 return -ENOMEM;
5412
5413 item->nla_type = value_nla_type;
5414 item->len = value_len;
5415 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
5416 memcpy(&item->value, value, item->len);
5417 list_add_tail(&item->list, &fmsg->item_list);
5418
5419 return 0;
5420}
5421
5422int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
5423{
573ed90a
AL		 5424 if (fmsg->putting_binary)
5425 return -EINVAL;
5426
1db64e87
EBE		 5427 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
5428}
5429EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
5430
5431int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
5432{
573ed90a
AL		 5433 if (fmsg->putting_binary)
5434 return -EINVAL;
5435
1db64e87
EBE		 5436 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
5437}
5438EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
5439
5440int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
5441{
573ed90a
AL		 5442 if (fmsg->putting_binary)
5443 return -EINVAL;
5444
1db64e87
EBE		 5445 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
5446}
5447EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
5448
5449int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
5450{
573ed90a
AL		 5451 if (fmsg->putting_binary)
5452 return -EINVAL;
5453
1db64e87
EBE		 5454 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
5455}
5456EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
5457
5458int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
5459{
573ed90a
AL		 5460 if (fmsg->putting_binary)
5461 return -EINVAL;
5462
1db64e87
EBE		 5463 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
5464 NLA_NUL_STRING);
5465}
5466EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
5467
573ed90a
AL		 5468int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
5469 u16 value_len)
1db64e87 5470{
573ed90a
AL		 5471 if (!fmsg->putting_binary)
5472 return -EINVAL;
5473
1db64e87
EBE		 5474 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
5475}
573ed90a 5476EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
1db64e87
EBE		 5477
5478int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
5479 bool value)
5480{
5481 int err;
5482
5483 err = devlink_fmsg_pair_nest_start(fmsg, name);
5484 if (err)
5485 return err;
5486
5487 err = devlink_fmsg_bool_put(fmsg, value);
5488 if (err)
5489 return err;
5490
5491 err = devlink_fmsg_pair_nest_end(fmsg);
5492 if (err)
5493 return err;
5494
5495 return 0;
5496}
5497EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
5498
5499int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
5500 u8 value)
5501{
5502 int err;
5503
5504 err = devlink_fmsg_pair_nest_start(fmsg, name);
5505 if (err)
5506 return err;
5507
5508 err = devlink_fmsg_u8_put(fmsg, value);
5509 if (err)
5510 return err;
5511
5512 err = devlink_fmsg_pair_nest_end(fmsg);
5513 if (err)
5514 return err;
5515
5516 return 0;
5517}
5518EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
5519
5520int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
5521 u32 value)
5522{
5523 int err;
5524
5525 err = devlink_fmsg_pair_nest_start(fmsg, name);
5526 if (err)
5527 return err;
5528
5529 err = devlink_fmsg_u32_put(fmsg, value);
5530 if (err)
5531 return err;
5532
5533 err = devlink_fmsg_pair_nest_end(fmsg);
5534 if (err)
5535 return err;
5536
5537 return 0;
5538}
5539EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
5540
5541int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
5542 u64 value)
5543{
5544 int err;
5545
5546 err = devlink_fmsg_pair_nest_start(fmsg, name);
5547 if (err)
5548 return err;
5549
5550 err = devlink_fmsg_u64_put(fmsg, value);
5551 if (err)
5552 return err;
5553
5554 err = devlink_fmsg_pair_nest_end(fmsg);
5555 if (err)
5556 return err;
5557
5558 return 0;
5559}
5560EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
5561
5562int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
5563 const char *value)
5564{
5565 int err;
5566
5567 err = devlink_fmsg_pair_nest_start(fmsg, name);
5568 if (err)
5569 return err;
5570
5571 err = devlink_fmsg_string_put(fmsg, value);
5572 if (err)
5573 return err;
5574
5575 err = devlink_fmsg_pair_nest_end(fmsg);
5576 if (err)
5577 return err;
5578
5579 return 0;
5580}
5581EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
5582
5583int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
e2cde864 5584 const void *value, u32 value_len)
1db64e87 5585{
e2cde864 5586 u32 data_size;
573ed90a 5587 int end_err;
e2cde864 5588 u32 offset;
1db64e87
EBE		 5589 int err;
5590
573ed90a 5591 err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
1db64e87
EBE		 5592 if (err)
5593 return err;
5594
e2cde864
AL		 5595 for (offset = 0; offset < value_len; offset += data_size) {
5596 data_size = value_len - offset;
5597 if (data_size > DEVLINK_FMSG_MAX_SIZE)
5598 data_size = DEVLINK_FMSG_MAX_SIZE;
5599 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
5600 if (err)
573ed90a
AL		 5601 break;
5602 /* Exit from loop with a break (instead of
5603 * return) to make sure putting_binary is turned off in
5604 * devlink_fmsg_binary_pair_nest_end
5605 */
e2cde864 5606 }
1db64e87 5607
573ed90a
AL		 5608 end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
5609 if (end_err)
5610 err = end_err;
1db64e87 5611
573ed90a 5612 return err;
1db64e87
EBE		 5613}
5614EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
5615
5616static int
5617devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
5618{
5619 switch (msg->nla_type) {
5620 case NLA_FLAG:
5621 case NLA_U8:
5622 case NLA_U32:
5623 case NLA_U64:
5624 case NLA_NUL_STRING:
5625 case NLA_BINARY:
5626 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
5627 msg->nla_type);
5628 default:
5629 return -EINVAL;
5630 }
5631}
5632
5633static int
5634devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
5635{
5636 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
5637 u8 tmp;
5638
5639 switch (msg->nla_type) {
5640 case NLA_FLAG:
5641 /* Always provide flag data, regardless of its value */
5642 tmp = *(bool *) msg->value;
5643
5644 return nla_put_u8(skb, attrtype, tmp);
5645 case NLA_U8:
5646 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
5647 case NLA_U32:
5648 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
5649 case NLA_U64:
5650 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
5651 DEVLINK_ATTR_PAD);
5652 case NLA_NUL_STRING:
5653 return nla_put_string(skb, attrtype, (char *) &msg->value);
5654 case NLA_BINARY:
5655 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
5656 default:
5657 return -EINVAL;
5658 }
5659}
5660
5661static int
5662devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5663 int *start)
5664{
5665 struct devlink_fmsg_item *item;
5666 struct nlattr *fmsg_nlattr;
5667 int i = 0;
5668 int err;
5669
ae0be8de 5670 fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
1db64e87
EBE		 5671 if (!fmsg_nlattr)
5672 return -EMSGSIZE;
5673
5674 list_for_each_entry(item, &fmsg->item_list, list) {
5675 if (i < *start) {
5676 i++;
5677 continue;
5678 }
5679
5680 switch (item->attrtype) {
5681 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
5682 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
5683 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
5684 case DEVLINK_ATTR_FMSG_NEST_END:
5685 err = nla_put_flag(skb, item->attrtype);
5686 break;
5687 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
5688 err = devlink_fmsg_item_fill_type(item, skb);
5689 if (err)
5690 break;
5691 err = devlink_fmsg_item_fill_data(item, skb);
5692 break;
5693 case DEVLINK_ATTR_FMSG_OBJ_NAME:
5694 err = nla_put_string(skb, item->attrtype,
5695 (char *) &item->value);
5696 break;
5697 default:
5698 err = -EINVAL;
5699 break;
5700 }
5701 if (!err)
5702 *start = ++i;
5703 else
5704 break;
5705 }
5706
5707 nla_nest_end(skb, fmsg_nlattr);
5708 return err;
5709}
5710
5711static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
5712 struct genl_info *info,
5713 enum devlink_command cmd, int flags)
5714{
5715 struct nlmsghdr *nlh;
5716 struct sk_buff *skb;
5717 bool last = false;
5718 int index = 0;
5719 void *hdr;
5720 int err;
5721
5722 while (!last) {
5723 int tmp_index = index;
5724
5725 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5726 if (!skb)
5727 return -ENOMEM;
5728
5729 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
5730 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
5731 if (!hdr) {
5732 err = -EMSGSIZE;
5733 goto nla_put_failure;
5734 }
5735
5736 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5737 if (!err)
5738 last = true;
5739 else if (err != -EMSGSIZE || tmp_index == index)
5740 goto nla_put_failure;
5741
5742 genlmsg_end(skb, hdr);
5743 err = genlmsg_reply(skb, info);
5744 if (err)
5745 return err;
5746 }
5747
5748 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5749 if (!skb)
5750 return -ENOMEM;
5751 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
5752 NLMSG_DONE, 0, flags | NLM_F_MULTI);
5753 if (!nlh) {
5754 err = -EMSGSIZE;
5755 goto nla_put_failure;
5756 }
1db64e87 5757
fde55ea7 5758 return genlmsg_reply(skb, info);
1db64e87
EBE		 5759
5760nla_put_failure:
5761 nlmsg_free(skb);
5762 return err;
5763}
5764
e44ef4e4
AL		 5765static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5766 struct netlink_callback *cb,
5767 enum devlink_command cmd)
5768{
5769 int index = cb->args[0];
5770 int tmp_index = index;
5771 void *hdr;
5772 int err;
5773
5774 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
5775 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
5776 if (!hdr) {
5777 err = -EMSGSIZE;
5778 goto nla_put_failure;
5779 }
5780
5781 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5782 if ((err && err != -EMSGSIZE) || tmp_index == index)
5783 goto nla_put_failure;
5784
5785 cb->args[0] = index;
5786 genlmsg_end(skb, hdr);
5787 return skb->len;
5788
5789nla_put_failure:
5790 genlmsg_cancel(skb, hdr);
5791 return err;
5792}
5793
a0bdcc59
EBE		 5794struct devlink_health_reporter {
5795 struct list_head list;
5796 void *priv;
5797 const struct devlink_health_reporter_ops *ops;
5798 struct devlink *devlink;
f4f54166 5799 struct devlink_port *devlink_port;
c8e1da0b
EBE		 5800 struct devlink_fmsg *dump_fmsg;
5801 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
a0bdcc59
EBE		 5802 u64 graceful_period;
5803 bool auto_recover;
48bb52c8 5804 bool auto_dump;
a0bdcc59 5805 u8 health_state;
c8e1da0b 5806 u64 dump_ts;
d279505b 5807 u64 dump_real_ts;
c8e1da0b
EBE		 5808 u64 error_count;
5809 u64 recovery_count;
5810 u64 last_recovery_ts;
b587bdaf 5811 refcount_t refcount;
c8e1da0b
EBE		 5812};
5813
a0bdcc59
EBE		 5814void *
5815devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
5816{
5817 return reporter->priv;
5818}
5819EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
5820
5821static struct devlink_health_reporter *
bd821005
VT		 5822__devlink_health_reporter_find_by_name(struct list_head *reporter_list,
5823 struct mutex *list_lock,
5824 const char *reporter_name)
a0bdcc59
EBE		 5825{
5826 struct devlink_health_reporter *reporter;
5827
bd821005
VT		 5828 lockdep_assert_held(list_lock);
5829 list_for_each_entry(reporter, reporter_list, list)
a0bdcc59
EBE		 5830 if (!strcmp(reporter->ops->name, reporter_name))
5831 return reporter;
5832 return NULL;
5833}
5834
bd821005
VT		 5835static struct devlink_health_reporter *
5836devlink_health_reporter_find_by_name(struct devlink *devlink,
5837 const char *reporter_name)
5838{
5839 return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
5840 &devlink->reporters_lock,
5841 reporter_name);
5842}
5843
f4f54166
VT		 5844static struct devlink_health_reporter *
5845devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
5846 const char *reporter_name)
5847{
5848 return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
5849 &devlink_port->reporters_lock,
5850 reporter_name);
5851}
5852
c57544b3
VT		 5853static struct devlink_health_reporter *
5854__devlink_health_reporter_create(struct devlink *devlink,
5855 const struct devlink_health_reporter_ops *ops,
5856 u64 graceful_period, void *priv)
5857{
5858 struct devlink_health_reporter *reporter;
5859
5860 if (WARN_ON(graceful_period && !ops->recover))
5861 return ERR_PTR(-EINVAL);
5862
5863 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
5864 if (!reporter)
5865 return ERR_PTR(-ENOMEM);
5866
5867 reporter->priv = priv;
5868 reporter->ops = ops;
5869 reporter->devlink = devlink;
5870 reporter->graceful_period = graceful_period;
5871 reporter->auto_recover = !!ops->recover;
5872 reporter->auto_dump = !!ops->dump;
5873 mutex_init(&reporter->dump_lock);
5874 refcount_set(&reporter->refcount, 1);
5875 return reporter;
5876}
5877
15c724b9
VT		 5878/**
5879 * devlink_port_health_reporter_create - create devlink health reporter for
5880 * specified port instance
5881 *
5882 * @port: devlink_port which should contain the new reporter
5883 * @ops: ops
5884 * @graceful_period: to avoid recovery loops, in msecs
5885 * @priv: priv
5886 */
5887struct devlink_health_reporter *
5888devlink_port_health_reporter_create(struct devlink_port *port,
5889 const struct devlink_health_reporter_ops *ops,
5890 u64 graceful_period, void *priv)
5891{
5892 struct devlink_health_reporter *reporter;
5893
5894 mutex_lock(&port->reporters_lock);
5895 if (__devlink_health_reporter_find_by_name(&port->reporter_list,
5896 &port->reporters_lock, ops->name)) {
5897 reporter = ERR_PTR(-EEXIST);
5898 goto unlock;
5899 }
5900
5901 reporter = __devlink_health_reporter_create(port->devlink, ops,
5902 graceful_period, priv);
5903 if (IS_ERR(reporter))
5904 goto unlock;
5905
5906 reporter->devlink_port = port;
5907 list_add_tail(&reporter->list, &port->reporter_list);
5908unlock:
5909 mutex_unlock(&port->reporters_lock);
5910 return reporter;
5911}
5912EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
5913
a0bdcc59
EBE		 5914/**
5915 * devlink_health_reporter_create - create devlink health reporter
5916 *
5917 * @devlink: devlink
5918 * @ops: ops
5919 * @graceful_period: to avoid recovery loops, in msecs
a0bdcc59
EBE		 5920 * @priv: priv
5921 */
5922struct devlink_health_reporter *
5923devlink_health_reporter_create(struct devlink *devlink,
5924 const struct devlink_health_reporter_ops *ops,
ba7d16c7 5925 u64 graceful_period, void *priv)
a0bdcc59
EBE		 5926{
5927 struct devlink_health_reporter *reporter;
5928
b587bdaf 5929 mutex_lock(&devlink->reporters_lock);
a0bdcc59
EBE		 5930 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
5931 reporter = ERR_PTR(-EEXIST);
5932 goto unlock;
5933 }
5934
c57544b3
VT		 5935 reporter = __devlink_health_reporter_create(devlink, ops,
5936 graceful_period, priv);
5937 if (IS_ERR(reporter))
a0bdcc59 5938 goto unlock;
a0bdcc59 5939
a0bdcc59
EBE		 5940 list_add_tail(&reporter->list, &devlink->reporter_list);
5941unlock:
b587bdaf 5942 mutex_unlock(&devlink->reporters_lock);
a0bdcc59
EBE		 5943 return reporter;
5944}
5945EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
5946
3c5584bf
VT		 5947static void
5948devlink_health_reporter_free(struct devlink_health_reporter *reporter)
5949{
5950 mutex_destroy(&reporter->dump_lock);
5951 if (reporter->dump_fmsg)
5952 devlink_fmsg_free(reporter->dump_fmsg);
5953 kfree(reporter);
5954}
5955
5956static void
5957devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5958{
5959 if (refcount_dec_and_test(&reporter->refcount))
5960 devlink_health_reporter_free(reporter);
5961}
5962
5963static void
5964__devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5965{
5966 list_del(&reporter->list);
5967 devlink_health_reporter_put(reporter);
5968}
5969
a0bdcc59
EBE		 5970/**
5971 * devlink_health_reporter_destroy - destroy devlink health reporter
5972 *
5973 * @reporter: devlink health reporter to destroy
5974 */
5975void
5976devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5977{
5d037b4d
IS		 5978 struct mutex *lock = &reporter->devlink->reporters_lock;
5979
5980 mutex_lock(lock);
3c5584bf 5981 __devlink_health_reporter_destroy(reporter);
5d037b4d 5982 mutex_unlock(lock);
a0bdcc59
EBE		 5983}
5984EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
5985
15c724b9
VT		 5986/**
5987 * devlink_port_health_reporter_destroy - destroy devlink port health reporter
5988 *
5989 * @reporter: devlink health reporter to destroy
5990 */
5991void
5992devlink_port_health_reporter_destroy(struct devlink_health_reporter *reporter)
5993{
5d037b4d
IS		 5994 struct mutex *lock = &reporter->devlink_port->reporters_lock;
5995
5996 mutex_lock(lock);
15c724b9 5997 __devlink_health_reporter_destroy(reporter);
5d037b4d 5998 mutex_unlock(lock);
15c724b9
VT		 5999}
6000EXPORT_SYMBOL_GPL(devlink_port_health_reporter_destroy);
6001
6ec8b6cd
MS		 6002static int
6003devlink_nl_health_reporter_fill(struct sk_buff *msg,
6004 struct devlink *devlink,
6005 struct devlink_health_reporter *reporter,
6006 enum devlink_command cmd, u32 portid,
6007 u32 seq, int flags)
6008{
6009 struct nlattr *reporter_attr;
6010 void *hdr;
6011
6012 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6013 if (!hdr)
6014 return -EMSGSIZE;
6015
6016 if (devlink_nl_put_handle(msg, devlink))
6017 goto genlmsg_cancel;
6018
f4f54166
VT		 6019 if (reporter->devlink_port) {
6020 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
6021 goto genlmsg_cancel;
6022 }
6ec8b6cd
MS		 6023 reporter_attr = nla_nest_start_noflag(msg,
6024 DEVLINK_ATTR_HEALTH_REPORTER);
6025 if (!reporter_attr)
6026 goto genlmsg_cancel;
6027 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
6028 reporter->ops->name))
6029 goto reporter_nest_cancel;
6030 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
6031 reporter->health_state))
6032 goto reporter_nest_cancel;
6033 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
6034 reporter->error_count, DEVLINK_ATTR_PAD))
6035 goto reporter_nest_cancel;
6036 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
6037 reporter->recovery_count, DEVLINK_ATTR_PAD))
6038 goto reporter_nest_cancel;
6039 if (reporter->ops->recover &&
6040 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
6041 reporter->graceful_period,
6042 DEVLINK_ATTR_PAD))
6043 goto reporter_nest_cancel;
6044 if (reporter->ops->recover &&
6045 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
6046 reporter->auto_recover))
6047 goto reporter_nest_cancel;
6048 if (reporter->dump_fmsg &&
6049 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
6050 jiffies_to_msecs(reporter->dump_ts),
6051 DEVLINK_ATTR_PAD))
6052 goto reporter_nest_cancel;
6053 if (reporter->dump_fmsg &&
6054 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
6055 reporter->dump_real_ts, DEVLINK_ATTR_PAD))
6056 goto reporter_nest_cancel;
48bb52c8
EBE		 6057 if (reporter->ops->dump &&
6058 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
6059 reporter->auto_dump))
6060 goto reporter_nest_cancel;
6ec8b6cd
MS		 6061
6062 nla_nest_end(msg, reporter_attr);
6063 genlmsg_end(msg, hdr);
6064 return 0;
6065
6066reporter_nest_cancel:
6067 nla_nest_end(msg, reporter_attr);
6068genlmsg_cancel:
6069 genlmsg_cancel(msg, hdr);
6070 return -EMSGSIZE;
6071}
6072
6073static void devlink_recover_notify(struct devlink_health_reporter *reporter,
6074 enum devlink_command cmd)
6075{
6076 struct sk_buff *msg;
6077 int err;
6078
6079 WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
6080
6081 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6082 if (!msg)
6083 return;
6084
6085 err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
6086 reporter, cmd, 0, 0, 0);
6087 if (err) {
6088 nlmsg_free(msg);
6089 return;
6090 }
6091
6092 genlmsg_multicast_netns(&devlink_nl_family,
6093 devlink_net(reporter->devlink),
6094 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
6095}
6096
6181e5cb
VG		 6097void
6098devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
6099{
6100 reporter->recovery_count++;
6101 reporter->last_recovery_ts = jiffies;
6102}
6103EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
6104
c8e1da0b
EBE		 6105static int
6106devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
e7a98105 6107 void *priv_ctx, struct netlink_ext_ack *extack)
c8e1da0b
EBE		 6108{
6109 int err;
6110
40281820
JP		 6111 if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
6112 return 0;
6113
c8e1da0b
EBE		 6114 if (!reporter->ops->recover)
6115 return -EOPNOTSUPP;
6116
e7a98105 6117 err = reporter->ops->recover(reporter, priv_ctx, extack);
c8e1da0b
EBE		 6118 if (err)
6119 return err;
6120
6181e5cb 6121 devlink_health_reporter_recovery_done(reporter);
c8e1da0b 6122 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
6ec8b6cd 6123 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
c8e1da0b
EBE		 6124
6125 return 0;
6126}
6127
6128static void
6129devlink_health_dump_clear(struct devlink_health_reporter *reporter)
6130{
6131 if (!reporter->dump_fmsg)
6132 return;
6133 devlink_fmsg_free(reporter->dump_fmsg);
6134 reporter->dump_fmsg = NULL;
6135}
6136
6137static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
e7a98105
JP		 6138 void *priv_ctx,
6139 struct netlink_ext_ack *extack)
c8e1da0b
EBE		 6140{
6141 int err;
6142
6143 if (!reporter->ops->dump)
6144 return 0;
6145
6146 if (reporter->dump_fmsg)
6147 return 0;
6148
6149 reporter->dump_fmsg = devlink_fmsg_alloc();
6150 if (!reporter->dump_fmsg) {
6151 err = -ENOMEM;
6152 return err;
6153 }
6154
6155 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
6156 if (err)
6157 goto dump_err;
6158
6159 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
e7a98105 6160 priv_ctx, extack);
c8e1da0b
EBE		 6161 if (err)
6162 goto dump_err;
6163
6164 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
6165 if (err)
6166 goto dump_err;
6167
6168 reporter->dump_ts = jiffies;
d279505b 6169 reporter->dump_real_ts = ktime_get_real_ns();
c8e1da0b
EBE		 6170
6171 return 0;
6172
6173dump_err:
6174 devlink_health_dump_clear(reporter);
6175 return err;
6176}
6177
6178int devlink_health_report(struct devlink_health_reporter *reporter,
6179 const char *msg, void *priv_ctx)
6180{
a0a21adb 6181 enum devlink_health_reporter_state prev_health_state;
c8e1da0b 6182 struct devlink *devlink = reporter->devlink;
bea0c5c9 6183 unsigned long recover_ts_threshold;
c8e1da0b
EBE		 6184
6185 /* write a log message of the current error */
6186 WARN_ON(!msg);
6187 trace_devlink_health_report(devlink, reporter->ops->name, msg);
6188 reporter->error_count++;
a0a21adb
EBE		 6189 prev_health_state = reporter->health_state;
6190 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
6ec8b6cd 6191 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
c8e1da0b
EBE		 6192
6193 /* abort if the previous error wasn't recovered */
bea0c5c9
AL		 6194 recover_ts_threshold = reporter->last_recovery_ts +
6195 msecs_to_jiffies(reporter->graceful_period);
c8e1da0b 6196 if (reporter->auto_recover &&
a0a21adb 6197 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
bea0c5c9
AL		 6198 (reporter->last_recovery_ts && reporter->recovery_count &&
6199 time_is_after_jiffies(recover_ts_threshold)))) {
c8e1da0b
EBE		 6200 trace_devlink_health_recover_aborted(devlink,
6201 reporter->ops->name,
6202 reporter->health_state,
6203 jiffies -
6204 reporter->last_recovery_ts);
6205 return -ECANCELED;
6206 }
6207
6208 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
6209
48bb52c8
EBE		 6210 if (reporter->auto_dump) {
6211 mutex_lock(&reporter->dump_lock);
6212 /* store current dump of current error, for later analysis */
6213 devlink_health_do_dump(reporter, priv_ctx, NULL);
6214 mutex_unlock(&reporter->dump_lock);
6215 }
c8e1da0b
EBE		 6216
6217 if (reporter->auto_recover)
e7a98105
JP		 6218 return devlink_health_reporter_recover(reporter,
6219 priv_ctx, NULL);
c8e1da0b
EBE		 6220
6221 return 0;
6222}
6223EXPORT_SYMBOL_GPL(devlink_health_report);
6224
7afe335a 6225static struct devlink_health_reporter *
e44ef4e4
AL		 6226devlink_health_reporter_get_from_attrs(struct devlink *devlink,
6227 struct nlattr **attrs)
7afe335a 6228{
b587bdaf 6229 struct devlink_health_reporter *reporter;
f4f54166 6230 struct devlink_port *devlink_port;
7afe335a
EBE		 6231 char *reporter_name;
6232
e44ef4e4 6233 if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
7afe335a
EBE		 6234 return NULL;
6235
e44ef4e4 6236 reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
f4f54166
VT		 6237 devlink_port = devlink_port_get_from_attrs(devlink, attrs);
6238 if (IS_ERR(devlink_port)) {
6239 mutex_lock(&devlink->reporters_lock);
6240 reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
6241 if (reporter)
6242 refcount_inc(&reporter->refcount);
6243 mutex_unlock(&devlink->reporters_lock);
6244 } else {
6245 mutex_lock(&devlink_port->reporters_lock);
6246 reporter = devlink_port_health_reporter_find_by_name(devlink_port, reporter_name);
6247 if (reporter)
6248 refcount_inc(&reporter->refcount);
6249 mutex_unlock(&devlink_port->reporters_lock);
6250 }
6251
b587bdaf
MS		 6252 return reporter;
6253}
6254
e44ef4e4
AL		 6255static struct devlink_health_reporter *
6256devlink_health_reporter_get_from_info(struct devlink *devlink,
6257 struct genl_info *info)
6258{
6259 return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
6260}
6261
6262static struct devlink_health_reporter *
6263devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
6264{
ee85da53 6265 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
e44ef4e4 6266 struct devlink_health_reporter *reporter;
ee85da53 6267 struct nlattr **attrs = info->attrs;
e44ef4e4 6268 struct devlink *devlink;
e44ef4e4
AL		 6269
6270 mutex_lock(&devlink_mutex);
6271 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
6272 if (IS_ERR(devlink))
6273 goto unlock;
6274
6275 reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
6276 mutex_unlock(&devlink_mutex);
e44ef4e4
AL		 6277 return reporter;
6278unlock:
6279 mutex_unlock(&devlink_mutex);
e44ef4e4
AL		 6280 return NULL;
6281}
6282
97ff3bd3
VG		 6283void
6284devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
6285 enum devlink_health_reporter_state state)
6286{
6287 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
6288 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
6289 return;
6290
6291 if (reporter->health_state == state)
6292 return;
6293
6294 reporter->health_state = state;
6295 trace_devlink_health_reporter_state_update(reporter->devlink,
6296 reporter->ops->name, state);
6297 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
6298}
6299EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
6300
7afe335a
EBE		 6301static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
6302 struct genl_info *info)
6303{
6304 struct devlink *devlink = info->user_ptr[0];
6305 struct devlink_health_reporter *reporter;
6306 struct sk_buff *msg;
6307 int err;
6308
6309 reporter = devlink_health_reporter_get_from_info(devlink, info);
6310 if (!reporter)
6311 return -EINVAL;
6312
6313 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
b587bdaf
MS		 6314 if (!msg) {
6315 err = -ENOMEM;
6316 goto out;
6317 }
7afe335a
EBE		 6318
6319 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
6320 DEVLINK_CMD_HEALTH_REPORTER_GET,
6321 info->snd_portid, info->snd_seq,
6322 0);
6323 if (err) {
6324 nlmsg_free(msg);
b587bdaf 6325 goto out;
7afe335a
EBE		 6326 }
6327
b587bdaf
MS		 6328 err = genlmsg_reply(msg, info);
6329out:
6330 devlink_health_reporter_put(reporter);
6331 return err;
7afe335a
EBE		 6332}
6333
6334static int
6335devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
6336 struct netlink_callback *cb)
6337{
6338 struct devlink_health_reporter *reporter;
f4f54166 6339 struct devlink_port *port;
7afe335a
EBE		 6340 struct devlink *devlink;
6341 int start = cb->args[0];
6342 int idx = 0;
6343 int err;
6344
6345 mutex_lock(&devlink_mutex);
6346 list_for_each_entry(devlink, &devlink_list, list) {
6347 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6348 continue;
b587bdaf 6349 mutex_lock(&devlink->reporters_lock);
7afe335a
EBE		 6350 list_for_each_entry(reporter, &devlink->reporter_list,
6351 list) {
6352 if (idx < start) {
6353 idx++;
6354 continue;
6355 }
6356 err = devlink_nl_health_reporter_fill(msg, devlink,
6357 reporter,
6358 DEVLINK_CMD_HEALTH_REPORTER_GET,
6359 NETLINK_CB(cb->skb).portid,
6360 cb->nlh->nlmsg_seq,
6361 NLM_F_MULTI);
6362 if (err) {
b587bdaf 6363 mutex_unlock(&devlink->reporters_lock);
7afe335a
EBE		 6364 goto out;
6365 }
6366 idx++;
6367 }
b587bdaf 6368 mutex_unlock(&devlink->reporters_lock);
7afe335a 6369 }
f4f54166
VT		 6370
6371 list_for_each_entry(devlink, &devlink_list, list) {
6372 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6373 continue;
5d080b50 6374 mutex_lock(&devlink->lock);
f4f54166
VT		 6375 list_for_each_entry(port, &devlink->port_list, list) {
6376 mutex_lock(&port->reporters_lock);
6377 list_for_each_entry(reporter, &port->reporter_list, list) {
6378 if (idx < start) {
6379 idx++;
6380 continue;
6381 }
6382 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
6383 DEVLINK_CMD_HEALTH_REPORTER_GET,
6384 NETLINK_CB(cb->skb).portid,
6385 cb->nlh->nlmsg_seq,
6386 NLM_F_MULTI);
6387 if (err) {
6388 mutex_unlock(&port->reporters_lock);
5d080b50 6389 mutex_unlock(&devlink->lock);
f4f54166
VT		 6390 goto out;
6391 }
6392 idx++;
6393 }
6394 mutex_unlock(&port->reporters_lock);
6395 }
5d080b50 6396 mutex_unlock(&devlink->lock);
f4f54166 6397 }
7afe335a
EBE		 6398out:
6399 mutex_unlock(&devlink_mutex);
6400
6401 cb->args[0] = idx;
6402 return msg->len;
6403}
6404
a1e55ec0
EBE		 6405static int
6406devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
6407 struct genl_info *info)
6408{
6409 struct devlink *devlink = info->user_ptr[0];
6410 struct devlink_health_reporter *reporter;
b587bdaf 6411 int err;
a1e55ec0
EBE		 6412
6413 reporter = devlink_health_reporter_get_from_info(devlink, info);
6414 if (!reporter)
6415 return -EINVAL;
6416
6417 if (!reporter->ops->recover &&
6418 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
b587bdaf
MS		 6419 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
6420 err = -EOPNOTSUPP;
6421 goto out;
6422 }
48bb52c8
EBE		 6423 if (!reporter->ops->dump &&
6424 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
6425 err = -EOPNOTSUPP;
6426 goto out;
6427 }
a1e55ec0
EBE		 6428
6429 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
6430 reporter->graceful_period =
6431 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
6432
6433 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
6434 reporter->auto_recover =
6435 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
6436
48bb52c8
EBE		 6437 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
6438 reporter->auto_dump =
6439 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
6440
b587bdaf 6441 devlink_health_reporter_put(reporter);
a1e55ec0 6442 return 0;
b587bdaf
MS		 6443out:
6444 devlink_health_reporter_put(reporter);
6445 return err;
a1e55ec0
EBE		 6446}
6447
20a0943a
EBE		 6448static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
6449 struct genl_info *info)
6450{
6451 struct devlink *devlink = info->user_ptr[0];
6452 struct devlink_health_reporter *reporter;
b587bdaf 6453 int err;
20a0943a
EBE		 6454
6455 reporter = devlink_health_reporter_get_from_info(devlink, info);
6456 if (!reporter)
6457 return -EINVAL;
6458
e7a98105 6459 err = devlink_health_reporter_recover(reporter, NULL, info->extack);
b587bdaf
MS		 6460
6461 devlink_health_reporter_put(reporter);
6462 return err;
20a0943a
EBE		 6463}
6464
fca42a27
EBE		 6465static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
6466 struct genl_info *info)
6467{
6468 struct devlink *devlink = info->user_ptr[0];
6469 struct devlink_health_reporter *reporter;
6470 struct devlink_fmsg *fmsg;
6471 int err;
6472
6473 reporter = devlink_health_reporter_get_from_info(devlink, info);
6474 if (!reporter)
6475 return -EINVAL;
6476
b587bdaf
MS		 6477 if (!reporter->ops->diagnose) {
6478 devlink_health_reporter_put(reporter);
fca42a27 6479 return -EOPNOTSUPP;
b587bdaf 6480 }
fca42a27
EBE		 6481
6482 fmsg = devlink_fmsg_alloc();
b587bdaf
MS		 6483 if (!fmsg) {
6484 devlink_health_reporter_put(reporter);
fca42a27 6485 return -ENOMEM;
b587bdaf 6486 }
fca42a27
EBE		 6487
6488 err = devlink_fmsg_obj_nest_start(fmsg);
6489 if (err)
6490 goto out;
6491
e7a98105 6492 err = reporter->ops->diagnose(reporter, fmsg, info->extack);
fca42a27
EBE		 6493 if (err)
6494 goto out;
6495
6496 err = devlink_fmsg_obj_nest_end(fmsg);
6497 if (err)
6498 goto out;
6499
6500 err = devlink_fmsg_snd(fmsg, info,
6501 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
6502
6503out:
6504 devlink_fmsg_free(fmsg);
b587bdaf 6505 devlink_health_reporter_put(reporter);
fca42a27
EBE		 6506 return err;
6507}
6508
e44ef4e4
AL		 6509static int
6510devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
6511 struct netlink_callback *cb)
35455e23 6512{
35455e23 6513 struct devlink_health_reporter *reporter;
e44ef4e4 6514 u64 start = cb->args[0];
35455e23
EBE		 6515 int err;
6516
e44ef4e4 6517 reporter = devlink_health_reporter_get_from_cb(cb);
35455e23
EBE		 6518 if (!reporter)
6519 return -EINVAL;
6520
b587bdaf 6521 if (!reporter->ops->dump) {
e44ef4e4
AL		 6522 err = -EOPNOTSUPP;
6523 goto out;
b587bdaf 6524 }
35455e23 6525 mutex_lock(&reporter->dump_lock);
e44ef4e4 6526 if (!start) {
e7a98105 6527 err = devlink_health_do_dump(reporter, NULL, cb->extack);
e44ef4e4
AL		 6528 if (err)
6529 goto unlock;
6530 cb->args[1] = reporter->dump_ts;
6531 }
6532 if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
6533 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
6534 err = -EAGAIN;
6535 goto unlock;
6536 }
35455e23 6537
e44ef4e4
AL		 6538 err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
6539 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
6540unlock:
35455e23 6541 mutex_unlock(&reporter->dump_lock);
e44ef4e4 6542out:
b587bdaf 6543 devlink_health_reporter_put(reporter);
35455e23
EBE		 6544 return err;
6545}
6546
6547static int
6548devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
6549 struct genl_info *info)
6550{
6551 struct devlink *devlink = info->user_ptr[0];
6552 struct devlink_health_reporter *reporter;
6553
6554 reporter = devlink_health_reporter_get_from_info(devlink, info);
6555 if (!reporter)
6556 return -EINVAL;
6557
b587bdaf
MS		 6558 if (!reporter->ops->dump) {
6559 devlink_health_reporter_put(reporter);
35455e23 6560 return -EOPNOTSUPP;
b587bdaf 6561 }
35455e23
EBE		 6562
6563 mutex_lock(&reporter->dump_lock);
6564 devlink_health_dump_clear(reporter);
6565 mutex_unlock(&reporter->dump_lock);
b587bdaf 6566 devlink_health_reporter_put(reporter);
35455e23
EBE		 6567 return 0;
6568}
6569
e2ce94dc
JP		 6570static int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
6571 struct genl_info *info)
6572{
6573 struct devlink *devlink = info->user_ptr[0];
6574 struct devlink_health_reporter *reporter;
6575 int err;
6576
6577 reporter = devlink_health_reporter_get_from_info(devlink, info);
6578 if (!reporter)
6579 return -EINVAL;
6580
6581 if (!reporter->ops->test) {
6582 devlink_health_reporter_put(reporter);
6583 return -EOPNOTSUPP;
6584 }
6585
6586 err = reporter->ops->test(reporter, info->extack);
6587
6588 devlink_health_reporter_put(reporter);
6589 return err;
6590}
6591
0f420b6c
IS		 6592struct devlink_stats {
6593 u64 rx_bytes;
6594 u64 rx_packets;
6595 struct u64_stats_sync syncp;
6596};
6597
1e8c6619
IS		 6598/**
6599 * struct devlink_trap_policer_item - Packet trap policer attributes.
6600 * @policer: Immutable packet trap policer attributes.
6601 * @rate: Rate in packets / sec.
6602 * @burst: Burst size in packets.
6603 * @list: trap_policer_list member.
6604 *
6605 * Describes packet trap policer attributes. Created by devlink during trap
6606 * policer registration.
6607 */
6608struct devlink_trap_policer_item {
6609 const struct devlink_trap_policer *policer;
6610 u64 rate;
6611 u64 burst;
6612 struct list_head list;
6613};
6614
0f420b6c
IS		 6615/**
6616 * struct devlink_trap_group_item - Packet trap group attributes.
6617 * @group: Immutable packet trap group attributes.
f9f54392 6618 * @policer_item: Associated policer item. Can be NULL.
0f420b6c
IS		 6619 * @list: trap_group_list member.
6620 * @stats: Trap group statistics.
6621 *
6622 * Describes packet trap group attributes. Created by devlink during trap
a09b37fc 6623 * group registration.
0f420b6c
IS		 6624 */
6625struct devlink_trap_group_item {
6626 const struct devlink_trap_group *group;
f9f54392 6627 struct devlink_trap_policer_item *policer_item;
0f420b6c
IS		 6628 struct list_head list;
6629 struct devlink_stats __percpu *stats;
6630};
6631
6632/**
6633 * struct devlink_trap_item - Packet trap attributes.
6634 * @trap: Immutable packet trap attributes.
6635 * @group_item: Associated group item.
6636 * @list: trap_list member.
6637 * @action: Trap action.
6638 * @stats: Trap statistics.
6639 * @priv: Driver private information.
6640 *
6641 * Describes both mutable and immutable packet trap attributes. Created by
6642 * devlink during trap registration and used for all trap related operations.
6643 */
6644struct devlink_trap_item {
6645 const struct devlink_trap *trap;
6646 struct devlink_trap_group_item *group_item;
6647 struct list_head list;
6648 enum devlink_trap_action action;
6649 struct devlink_stats __percpu *stats;
6650 void *priv;
6651};
6652
1e8c6619
IS		 6653static struct devlink_trap_policer_item *
6654devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
6655{
6656 struct devlink_trap_policer_item *policer_item;
6657
6658 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
6659 if (policer_item->policer->id == id)
6660 return policer_item;
6661 }
6662
6663 return NULL;
6664}
6665
0f420b6c
IS		 6666static struct devlink_trap_item *
6667devlink_trap_item_lookup(struct devlink *devlink, const char *name)
6668{
6669 struct devlink_trap_item *trap_item;
6670
6671 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6672 if (!strcmp(trap_item->trap->name, name))
6673 return trap_item;
6674 }
6675
6676 return NULL;
6677}
6678
6679static struct devlink_trap_item *
6680devlink_trap_item_get_from_info(struct devlink *devlink,
6681 struct genl_info *info)
6682{
6683 struct nlattr *attr;
6684
6685 if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
6686 return NULL;
6687 attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
6688
6689 return devlink_trap_item_lookup(devlink, nla_data(attr));
6690}
6691
6692static int
6693devlink_trap_action_get_from_info(struct genl_info *info,
6694 enum devlink_trap_action *p_trap_action)
6695{
6696 u8 val;
6697
6698 val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
6699 switch (val) {
df561f66
GS		 6700 case DEVLINK_TRAP_ACTION_DROP:
6701 case DEVLINK_TRAP_ACTION_TRAP:
9eefeabe 6702 case DEVLINK_TRAP_ACTION_MIRROR:
0f420b6c
IS		 6703 *p_trap_action = val;
6704 break;
6705 default:
6706 return -EINVAL;
6707 }
6708
6709 return 0;
6710}
6711
6712static int devlink_trap_metadata_put(struct sk_buff *msg,
6713 const struct devlink_trap *trap)
6714{
6715 struct nlattr *attr;
6716
6717 attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
6718 if (!attr)
6719 return -EMSGSIZE;
6720
6721 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
6722 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
6723 goto nla_put_failure;
85b0589e
JP		 6724 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
6725 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
6726 goto nla_put_failure;
0f420b6c
IS		 6727
6728 nla_nest_end(msg, attr);
6729
6730 return 0;
6731
6732nla_put_failure:
6733 nla_nest_cancel(msg, attr);
6734 return -EMSGSIZE;
6735}
6736
6737static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
6738 struct devlink_stats *stats)
6739{
6740 int i;
6741
6742 memset(stats, 0, sizeof(*stats));
6743 for_each_possible_cpu(i) {
6744 struct devlink_stats *cpu_stats;
6745 u64 rx_packets, rx_bytes;
6746 unsigned int start;
6747
6748 cpu_stats = per_cpu_ptr(trap_stats, i);
6749 do {
6750 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
6751 rx_packets = cpu_stats->rx_packets;
6752 rx_bytes = cpu_stats->rx_bytes;
6753 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
6754
6755 stats->rx_packets += rx_packets;
6756 stats->rx_bytes += rx_bytes;
6757 }
6758}
6759
6760static int devlink_trap_stats_put(struct sk_buff *msg,
6761 struct devlink_stats __percpu *trap_stats)
6762{
6763 struct devlink_stats stats;
6764 struct nlattr *attr;
6765
6766 devlink_trap_stats_read(trap_stats, &stats);
6767
6768 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
6769 if (!attr)
6770 return -EMSGSIZE;
6771
6772 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
6773 stats.rx_packets, DEVLINK_ATTR_PAD))
6774 goto nla_put_failure;
6775
6776 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
6777 stats.rx_bytes, DEVLINK_ATTR_PAD))
6778 goto nla_put_failure;
6779
6780 nla_nest_end(msg, attr);
6781
6782 return 0;
6783
6784nla_put_failure:
6785 nla_nest_cancel(msg, attr);
6786 return -EMSGSIZE;
6787}
6788
6789static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
6790 const struct devlink_trap_item *trap_item,
6791 enum devlink_command cmd, u32 portid, u32 seq,
6792 int flags)
6793{
6794 struct devlink_trap_group_item *group_item = trap_item->group_item;
6795 void *hdr;
6796 int err;
6797
6798 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6799 if (!hdr)
6800 return -EMSGSIZE;
6801
6802 if (devlink_nl_put_handle(msg, devlink))
6803 goto nla_put_failure;
6804
6805 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
6806 group_item->group->name))
6807 goto nla_put_failure;
6808
6809 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
6810 goto nla_put_failure;
6811
6812 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
6813 goto nla_put_failure;
6814
6815 if (trap_item->trap->generic &&
6816 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
6817 goto nla_put_failure;
6818
6819 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
6820 goto nla_put_failure;
6821
6822 err = devlink_trap_metadata_put(msg, trap_item->trap);
6823 if (err)
6824 goto nla_put_failure;
6825
6826 err = devlink_trap_stats_put(msg, trap_item->stats);
6827 if (err)
6828 goto nla_put_failure;
6829
6830 genlmsg_end(msg, hdr);
6831
6832 return 0;
6833
6834nla_put_failure:
6835 genlmsg_cancel(msg, hdr);
6836 return -EMSGSIZE;
6837}
6838
6839static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
6840 struct genl_info *info)
6841{
6842 struct netlink_ext_ack *extack = info->extack;
6843 struct devlink *devlink = info->user_ptr[0];
6844 struct devlink_trap_item *trap_item;
6845 struct sk_buff *msg;
6846 int err;
6847
6848 if (list_empty(&devlink->trap_list))
6849 return -EOPNOTSUPP;
6850
6851 trap_item = devlink_trap_item_get_from_info(devlink, info);
6852 if (!trap_item) {
6853 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6854 return -ENOENT;
6855 }
6856
6857 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6858 if (!msg)
6859 return -ENOMEM;
6860
6861 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6862 DEVLINK_CMD_TRAP_NEW, info->snd_portid,
6863 info->snd_seq, 0);
6864 if (err)
6865 goto err_trap_fill;
6866
6867 return genlmsg_reply(msg, info);
6868
6869err_trap_fill:
6870 nlmsg_free(msg);
6871 return err;
6872}
6873
6874static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
6875 struct netlink_callback *cb)
6876{
6877 struct devlink_trap_item *trap_item;
6878 struct devlink *devlink;
6879 int start = cb->args[0];
6880 int idx = 0;
6881 int err;
6882
6883 mutex_lock(&devlink_mutex);
6884 list_for_each_entry(devlink, &devlink_list, list) {
6885 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6886 continue;
6887 mutex_lock(&devlink->lock);
6888 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6889 if (idx < start) {
6890 idx++;
6891 continue;
6892 }
6893 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6894 DEVLINK_CMD_TRAP_NEW,
6895 NETLINK_CB(cb->skb).portid,
6896 cb->nlh->nlmsg_seq,
6897 NLM_F_MULTI);
6898 if (err) {
6899 mutex_unlock(&devlink->lock);
6900 goto out;
6901 }
6902 idx++;
6903 }
6904 mutex_unlock(&devlink->lock);
6905 }
6906out:
6907 mutex_unlock(&devlink_mutex);
6908
6909 cb->args[0] = idx;
6910 return msg->len;
6911}
6912
6913static int __devlink_trap_action_set(struct devlink *devlink,
6914 struct devlink_trap_item *trap_item,
6915 enum devlink_trap_action trap_action,
6916 struct netlink_ext_ack *extack)
6917{
6918 int err;
6919
6920 if (trap_item->action != trap_action &&
6921 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
6922 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
6923 return 0;
6924 }
6925
6926 err = devlink->ops->trap_action_set(devlink, trap_item->trap,
c88e11e0 6927 trap_action, extack);
0f420b6c
IS		 6928 if (err)
6929 return err;
6930
6931 trap_item->action = trap_action;
6932
6933 return 0;
6934}
6935
6936static int devlink_trap_action_set(struct devlink *devlink,
6937 struct devlink_trap_item *trap_item,
6938 struct genl_info *info)
6939{
6940 enum devlink_trap_action trap_action;
6941 int err;
6942
6943 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6944 return 0;
6945
6946 err = devlink_trap_action_get_from_info(info, &trap_action);
6947 if (err) {
6948 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6949 return -EINVAL;
6950 }
6951
6952 return __devlink_trap_action_set(devlink, trap_item, trap_action,
6953 info->extack);
6954}
6955
6956static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
6957 struct genl_info *info)
6958{
6959 struct netlink_ext_ack *extack = info->extack;
6960 struct devlink *devlink = info->user_ptr[0];
6961 struct devlink_trap_item *trap_item;
6962 int err;
6963
6964 if (list_empty(&devlink->trap_list))
6965 return -EOPNOTSUPP;
6966
6967 trap_item = devlink_trap_item_get_from_info(devlink, info);
6968 if (!trap_item) {
6969 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6970 return -ENOENT;
6971 }
6972
6973 err = devlink_trap_action_set(devlink, trap_item, info);
6974 if (err)
6975 return err;
6976
6977 return 0;
6978}
6979
6980static struct devlink_trap_group_item *
6981devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
6982{
6983 struct devlink_trap_group_item *group_item;
6984
6985 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6986 if (!strcmp(group_item->group->name, name))
6987 return group_item;
6988 }
6989
6990 return NULL;
6991}
6992
107f1678
IS		 6993static struct devlink_trap_group_item *
6994devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
6995{
6996 struct devlink_trap_group_item *group_item;
6997
6998 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6999 if (group_item->group->id == id)
7000 return group_item;
7001 }
7002
7003 return NULL;
7004}
7005
0f420b6c
IS		 7006static struct devlink_trap_group_item *
7007devlink_trap_group_item_get_from_info(struct devlink *devlink,
7008 struct genl_info *info)
7009{
7010 char *name;
7011
7012 if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
7013 return NULL;
7014 name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
7015
7016 return devlink_trap_group_item_lookup(devlink, name);
7017}
7018
7019static int
7020devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
7021 const struct devlink_trap_group_item *group_item,
7022 enum devlink_command cmd, u32 portid, u32 seq,
7023 int flags)
7024{
7025 void *hdr;
7026 int err;
7027
7028 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
7029 if (!hdr)
7030 return -EMSGSIZE;
7031
7032 if (devlink_nl_put_handle(msg, devlink))
7033 goto nla_put_failure;
7034
7035 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
7036 group_item->group->name))
7037 goto nla_put_failure;
7038
7039 if (group_item->group->generic &&
7040 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
7041 goto nla_put_failure;
7042
f9f54392
IS		 7043 if (group_item->policer_item &&
7044 nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
7045 group_item->policer_item->policer->id))
7046 goto nla_put_failure;
7047
0f420b6c
IS		 7048 err = devlink_trap_stats_put(msg, group_item->stats);
7049 if (err)
7050 goto nla_put_failure;
7051
7052 genlmsg_end(msg, hdr);
7053
7054 return 0;
7055
7056nla_put_failure:
7057 genlmsg_cancel(msg, hdr);
7058 return -EMSGSIZE;
7059}
7060
7061static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
7062 struct genl_info *info)
7063{
7064 struct netlink_ext_ack *extack = info->extack;
7065 struct devlink *devlink = info->user_ptr[0];
7066 struct devlink_trap_group_item *group_item;
7067 struct sk_buff *msg;
7068 int err;
7069
7070 if (list_empty(&devlink->trap_group_list))
7071 return -EOPNOTSUPP;
7072
7073 group_item = devlink_trap_group_item_get_from_info(devlink, info);
7074 if (!group_item) {
7075 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
7076 return -ENOENT;
7077 }
7078
7079 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7080 if (!msg)
7081 return -ENOMEM;
7082
7083 err = devlink_nl_trap_group_fill(msg, devlink, group_item,
7084 DEVLINK_CMD_TRAP_GROUP_NEW,
7085 info->snd_portid, info->snd_seq, 0);
7086 if (err)
7087 goto err_trap_group_fill;
7088
7089 return genlmsg_reply(msg, info);
7090
7091err_trap_group_fill:
7092 nlmsg_free(msg);
7093 return err;
7094}
7095
7096static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
7097 struct netlink_callback *cb)
7098{
7099 enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
7100 struct devlink_trap_group_item *group_item;
7101 u32 portid = NETLINK_CB(cb->skb).portid;
7102 struct devlink *devlink;
7103 int start = cb->args[0];
7104 int idx = 0;
7105 int err;
7106
7107 mutex_lock(&devlink_mutex);
7108 list_for_each_entry(devlink, &devlink_list, list) {
7109 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
7110 continue;
7111 mutex_lock(&devlink->lock);
7112 list_for_each_entry(group_item, &devlink->trap_group_list,
7113 list) {
7114 if (idx < start) {
7115 idx++;
7116 continue;
7117 }
7118 err = devlink_nl_trap_group_fill(msg, devlink,
7119 group_item, cmd,
7120 portid,
7121 cb->nlh->nlmsg_seq,
7122 NLM_F_MULTI);
7123 if (err) {
7124 mutex_unlock(&devlink->lock);
7125 goto out;
7126 }
7127 idx++;
7128 }
7129 mutex_unlock(&devlink->lock);
7130 }
7131out:
7132 mutex_unlock(&devlink_mutex);
7133
7134 cb->args[0] = idx;
7135 return msg->len;
7136}
7137
7138static int
7139__devlink_trap_group_action_set(struct devlink *devlink,
7140 struct devlink_trap_group_item *group_item,
7141 enum devlink_trap_action trap_action,
7142 struct netlink_ext_ack *extack)
7143{
7144 const char *group_name = group_item->group->name;
7145 struct devlink_trap_item *trap_item;
7146 int err;
7147
c50bf2be
IC		 7148 if (devlink->ops->trap_group_action_set) {
7149 err = devlink->ops->trap_group_action_set(devlink, group_item->group,
7150 trap_action, extack);
7151 if (err)
7152 return err;
7153
7154 list_for_each_entry(trap_item, &devlink->trap_list, list) {
7155 if (strcmp(trap_item->group_item->group->name, group_name))
7156 continue;
7157 if (trap_item->action != trap_action &&
7158 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP)
7159 continue;
7160 trap_item->action = trap_action;
7161 }
7162
7163 return 0;
7164 }
7165
0f420b6c 7166 list_for_each_entry(trap_item, &devlink->trap_list, list) {
107f1678 7167 if (strcmp(trap_item->group_item->group->name, group_name))
0f420b6c
IS		 7168 continue;
7169 err = __devlink_trap_action_set(devlink, trap_item,
7170 trap_action, extack);
7171 if (err)
7172 return err;
7173 }
7174
7175 return 0;
7176}
7177
7178static int
7179devlink_trap_group_action_set(struct devlink *devlink,
7180 struct devlink_trap_group_item *group_item,
c064875a 7181 struct genl_info *info, bool *p_modified)
0f420b6c
IS		 7182{
7183 enum devlink_trap_action trap_action;
7184 int err;
7185
7186 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
7187 return 0;
7188
7189 err = devlink_trap_action_get_from_info(info, &trap_action);
7190 if (err) {
7191 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
7192 return -EINVAL;
7193 }
7194
7195 err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
7196 info->extack);
7197 if (err)
7198 return err;
7199
c064875a
IS		 7200 *p_modified = true;
7201
7202 return 0;
7203}
7204
7205static int devlink_trap_group_set(struct devlink *devlink,
7206 struct devlink_trap_group_item *group_item,
7207 struct genl_info *info)
7208{
7209 struct devlink_trap_policer_item *policer_item;
7210 struct netlink_ext_ack *extack = info->extack;
7211 const struct devlink_trap_policer *policer;
7212 struct nlattr **attrs = info->attrs;
7213 int err;
7214
7215 if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
7216 return 0;
7217
7218 if (!devlink->ops->trap_group_set)
7219 return -EOPNOTSUPP;
7220
7221 policer_item = group_item->policer_item;
7222 if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) {
7223 u32 policer_id;
7224
7225 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
7226 policer_item = devlink_trap_policer_item_lookup(devlink,
7227 policer_id);
7228 if (policer_id && !policer_item) {
7229 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
7230 return -ENOENT;
7231 }
7232 }
7233 policer = policer_item ? policer_item->policer : NULL;
7234
c88e11e0
IS		 7235 err = devlink->ops->trap_group_set(devlink, group_item->group, policer,
7236 extack);
c064875a
IS		 7237 if (err)
7238 return err;
7239
7240 group_item->policer_item = policer_item;
7241
0f420b6c
IS		 7242 return 0;
7243}
7244
7245static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
7246 struct genl_info *info)
7247{
7248 struct netlink_ext_ack *extack = info->extack;
7249 struct devlink *devlink = info->user_ptr[0];
7250 struct devlink_trap_group_item *group_item;
c064875a 7251 bool modified = false;
0f420b6c
IS		 7252 int err;
7253
7254 if (list_empty(&devlink->trap_group_list))
7255 return -EOPNOTSUPP;
7256
7257 group_item = devlink_trap_group_item_get_from_info(devlink, info);
7258 if (!group_item) {
7259 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
7260 return -ENOENT;
7261 }
7262
c064875a
IS		 7263 err = devlink_trap_group_action_set(devlink, group_item, info,
7264 &modified);
0f420b6c
IS		 7265 if (err)
7266 return err;
7267
c064875a
IS		 7268 err = devlink_trap_group_set(devlink, group_item, info);
7269 if (err)
7270 goto err_trap_group_set;
7271
0f420b6c 7272 return 0;
c064875a
IS		 7273
7274err_trap_group_set:
7275 if (modified)
7276 NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
7277 return err;
0f420b6c
IS		 7278}
7279
1e8c6619
IS		 7280static struct devlink_trap_policer_item *
7281devlink_trap_policer_item_get_from_info(struct devlink *devlink,
7282 struct genl_info *info)
7283{
7284 u32 id;
7285
7286 if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
7287 return NULL;
7288 id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
7289
7290 return devlink_trap_policer_item_lookup(devlink, id);
7291}
7292
7293static int
7294devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
7295 const struct devlink_trap_policer *policer)
7296{
7297 struct nlattr *attr;
7298 u64 drops;
7299 int err;
7300
7301 if (!devlink->ops->trap_policer_counter_get)
7302 return 0;
7303
7304 err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
7305 if (err)
7306 return err;
7307
7308 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
7309 if (!attr)
7310 return -EMSGSIZE;
7311
7312 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
7313 DEVLINK_ATTR_PAD))
7314 goto nla_put_failure;
7315
7316 nla_nest_end(msg, attr);
7317
7318 return 0;
7319
7320nla_put_failure:
7321 nla_nest_cancel(msg, attr);
7322 return -EMSGSIZE;
7323}
7324
7325static int
7326devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
7327 const struct devlink_trap_policer_item *policer_item,
7328 enum devlink_command cmd, u32 portid, u32 seq,
7329 int flags)
7330{
7331 void *hdr;
7332 int err;
7333
7334 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
7335 if (!hdr)
7336 return -EMSGSIZE;
7337
7338 if (devlink_nl_put_handle(msg, devlink))
7339 goto nla_put_failure;
7340
7341 if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
7342 policer_item->policer->id))
7343 goto nla_put_failure;
7344
7345 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
7346 policer_item->rate, DEVLINK_ATTR_PAD))
7347 goto nla_put_failure;
7348
7349 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
7350 policer_item->burst, DEVLINK_ATTR_PAD))
7351 goto nla_put_failure;
7352
7353 err = devlink_trap_policer_stats_put(msg, devlink,
7354 policer_item->policer);
7355 if (err)
7356 goto nla_put_failure;
7357
7358 genlmsg_end(msg, hdr);
7359
7360 return 0;
7361
7362nla_put_failure:
7363 genlmsg_cancel(msg, hdr);
7364 return -EMSGSIZE;
7365}
7366
7367static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
7368 struct genl_info *info)
7369{
7370 struct devlink_trap_policer_item *policer_item;
7371 struct netlink_ext_ack *extack = info->extack;
7372 struct devlink *devlink = info->user_ptr[0];
7373 struct sk_buff *msg;
7374 int err;
7375
7376 if (list_empty(&devlink->trap_policer_list))
7377 return -EOPNOTSUPP;
7378
7379 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
7380 if (!policer_item) {
7381 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
7382 return -ENOENT;
7383 }
7384
7385 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7386 if (!msg)
7387 return -ENOMEM;
7388
7389 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
7390 DEVLINK_CMD_TRAP_POLICER_NEW,
7391 info->snd_portid, info->snd_seq, 0);
7392 if (err)
7393 goto err_trap_policer_fill;
7394
7395 return genlmsg_reply(msg, info);
7396
7397err_trap_policer_fill:
7398 nlmsg_free(msg);
7399 return err;
7400}
7401
7402static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
7403 struct netlink_callback *cb)
7404{
7405 enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
7406 struct devlink_trap_policer_item *policer_item;
7407 u32 portid = NETLINK_CB(cb->skb).portid;
7408 struct devlink *devlink;
7409 int start = cb->args[0];
7410 int idx = 0;
7411 int err;
7412
7413 mutex_lock(&devlink_mutex);
7414 list_for_each_entry(devlink, &devlink_list, list) {
7415 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
7416 continue;
7417 mutex_lock(&devlink->lock);
7418 list_for_each_entry(policer_item, &devlink->trap_policer_list,
7419 list) {
7420 if (idx < start) {
7421 idx++;
7422 continue;
7423 }
7424 err = devlink_nl_trap_policer_fill(msg, devlink,
7425 policer_item, cmd,
7426 portid,
7427 cb->nlh->nlmsg_seq,
7428 NLM_F_MULTI);
7429 if (err) {
7430 mutex_unlock(&devlink->lock);
7431 goto out;
7432 }
7433 idx++;
7434 }
7435 mutex_unlock(&devlink->lock);
7436 }
7437out:
7438 mutex_unlock(&devlink_mutex);
7439
7440 cb->args[0] = idx;
7441 return msg->len;
7442}
7443
7444static int
7445devlink_trap_policer_set(struct devlink *devlink,
7446 struct devlink_trap_policer_item *policer_item,
7447 struct genl_info *info)
7448{
7449 struct netlink_ext_ack *extack = info->extack;
7450 struct nlattr **attrs = info->attrs;
7451 u64 rate, burst;
7452 int err;
7453
7454 rate = policer_item->rate;
7455 burst = policer_item->burst;
7456
7457 if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
7458 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
7459
7460 if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
7461 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
7462
7463 if (rate < policer_item->policer->min_rate) {
7464 NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
7465 return -EINVAL;
7466 }
7467
7468 if (rate > policer_item->policer->max_rate) {
7469 NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
7470 return -EINVAL;
7471 }
7472
7473 if (burst < policer_item->policer->min_burst) {
7474 NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
7475 return -EINVAL;
7476 }
7477
7478 if (burst > policer_item->policer->max_burst) {
7479 NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
7480 return -EINVAL;
7481 }
7482
7483 err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
7484 rate, burst, info->extack);
7485 if (err)
7486 return err;
7487
7488 policer_item->rate = rate;
7489 policer_item->burst = burst;
7490
7491 return 0;
7492}
7493
7494static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
7495 struct genl_info *info)
7496{
7497 struct devlink_trap_policer_item *policer_item;
7498 struct netlink_ext_ack *extack = info->extack;
7499 struct devlink *devlink = info->user_ptr[0];
7500
7501 if (list_empty(&devlink->trap_policer_list))
7502 return -EOPNOTSUPP;
7503
7504 if (!devlink->ops->trap_policer_set)
7505 return -EOPNOTSUPP;
7506
7507 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
7508 if (!policer_item) {
7509 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
7510 return -ENOENT;
7511 }
7512
7513 return devlink_trap_policer_set(devlink, policer_item, info);
7514}
7515
bfcd3a46 7516static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
1e8c6619
IS		 7517 [DEVLINK_ATTR_UNSPEC] = { .strict_start_type =
7518 DEVLINK_ATTR_TRAP_POLICER_ID },
bfcd3a46
JP		 7519 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
7520 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
7521 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
c49a9440
PP		 7522 [DEVLINK_ATTR_PORT_TYPE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_PORT_TYPE_AUTO,
7523 DEVLINK_PORT_TYPE_IB),
bfcd3a46 7524 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
bf797471
JP		 7525 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
7526 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
7527 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
7528 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
7529 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
7530 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
7531 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
ba356c90
PP		 7532 [DEVLINK_ATTR_ESWITCH_MODE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_ESWITCH_MODE_LEGACY,
7533 DEVLINK_ESWITCH_MODE_SWITCHDEV),
59bfde01 7534 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
f43e9b06 7535 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
1555d204
AS		 7536 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
7537 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
d9f9b9a4
AS		 7538 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
7539 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
e3b7ca18
MS		 7540 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
7541 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
7542 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
d8db7ea5 7543 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
866319bb 7544 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
ff3b63b8
JK		 7545 [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
7546 [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
7afe335a 7547 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
a1e55ec0
EBE		 7548 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
7549 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
76726ccb
JK		 7550 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
7551 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5d5b4128
JK		 7552 [DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK] =
7553 NLA_POLICY_BITFIELD32(DEVLINK_SUPPORTED_FLASH_OVERWRITE_SECTIONS),
0f420b6c
IS		 7554 [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
7555 [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
7556 [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
070c63f2
JP		 7557 [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
7558 [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
7559 [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
48bb52c8 7560 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },
1e8c6619
IS		 7561 [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
7562 [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
7563 [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
a1e8ae90 7564 [DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },
ccdf0721
MS		 7565 [DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
7566 DEVLINK_RELOAD_ACTION_MAX),
dc64cc7c 7567 [DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK),
bfcd3a46
JP		 7568};
7569
66a9b928 7570static const struct genl_small_ops devlink_nl_ops[] = {
bfcd3a46
JP		 7571 {
7572 .cmd = DEVLINK_CMD_GET,
ef6243ac 7573 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bfcd3a46
JP		 7574 .doit = devlink_nl_cmd_get_doit,
7575 .dumpit = devlink_nl_cmd_get_dumpit,
bfcd3a46
JP		 7576 /* can be retrieved by unprivileged users */
7577 },
7578 {
7579 .cmd = DEVLINK_CMD_PORT_GET,
ef6243ac 7580 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bfcd3a46
JP		 7581 .doit = devlink_nl_cmd_port_get_doit,
7582 .dumpit = devlink_nl_cmd_port_get_dumpit,
bfcd3a46
JP		 7583 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7584 /* can be retrieved by unprivileged users */
7585 },
7586 {
7587 .cmd = DEVLINK_CMD_PORT_SET,
ef6243ac 7588 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bfcd3a46 7589 .doit = devlink_nl_cmd_port_set_doit,
bfcd3a46
JP		 7590 .flags = GENL_ADMIN_PERM,
7591 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7592 },
7593 {
7594 .cmd = DEVLINK_CMD_PORT_SPLIT,
ef6243ac 7595 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bfcd3a46 7596 .doit = devlink_nl_cmd_port_split_doit,
bfcd3a46 7597 .flags = GENL_ADMIN_PERM,
637989b5 7598 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
bfcd3a46
JP		 7599 },
7600 {
7601 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
ef6243ac 7602 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bfcd3a46 7603 .doit = devlink_nl_cmd_port_unsplit_doit,
bfcd3a46 7604 .flags = GENL_ADMIN_PERM,
637989b5 7605 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
bfcd3a46 7606 },
bf797471
JP		 7607 {
7608 .cmd = DEVLINK_CMD_SB_GET,
ef6243ac 7609 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471
JP		 7610 .doit = devlink_nl_cmd_sb_get_doit,
7611 .dumpit = devlink_nl_cmd_sb_get_dumpit,
bf797471
JP		 7612 /* can be retrieved by unprivileged users */
7613 },
7614 {
7615 .cmd = DEVLINK_CMD_SB_POOL_GET,
ef6243ac 7616 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471
JP		 7617 .doit = devlink_nl_cmd_sb_pool_get_doit,
7618 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
bf797471
JP		 7619 /* can be retrieved by unprivileged users */
7620 },
7621 {
7622 .cmd = DEVLINK_CMD_SB_POOL_SET,
ef6243ac 7623 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471 7624 .doit = devlink_nl_cmd_sb_pool_set_doit,
bf797471 7625 .flags = GENL_ADMIN_PERM,
bf797471
JP		 7626 },
7627 {
7628 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
ef6243ac 7629 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471
JP		 7630 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
7631 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
637989b5 7632 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
bf797471
JP		 7633 /* can be retrieved by unprivileged users */
7634 },
7635 {
7636 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
ef6243ac 7637 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471 7638 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
bf797471 7639 .flags = GENL_ADMIN_PERM,
637989b5 7640 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
bf797471
JP		 7641 },
7642 {
7643 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
ef6243ac 7644 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471
JP		 7645 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
7646 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
637989b5 7647 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
bf797471
JP		 7648 /* can be retrieved by unprivileged users */
7649 },
7650 {
7651 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
ef6243ac 7652 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
bf797471 7653 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
bf797471 7654 .flags = GENL_ADMIN_PERM,
637989b5 7655 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
bf797471 7656 },
df38dafd
JP		 7657 {
7658 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
ef6243ac 7659 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
df38dafd 7660 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
df38dafd 7661 .flags = GENL_ADMIN_PERM,
df38dafd
JP		 7662 },
7663 {
7664 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
ef6243ac 7665 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
df38dafd 7666 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
df38dafd 7667 .flags = GENL_ADMIN_PERM,
df38dafd 7668 },
08f4b591 7669 {
adf200f3 7670 .cmd = DEVLINK_CMD_ESWITCH_GET,
ef6243ac 7671 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
adf200f3 7672 .doit = devlink_nl_cmd_eswitch_get_doit,
08f4b591 7673 .flags = GENL_ADMIN_PERM,
637989b5 7674 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
08f4b591
OG		 7675 },
7676 {
adf200f3 7677 .cmd = DEVLINK_CMD_ESWITCH_SET,
ef6243ac 7678 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
adf200f3 7679 .doit = devlink_nl_cmd_eswitch_set_doit,
08f4b591 7680 .flags = GENL_ADMIN_PERM,
637989b5 7681 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
08f4b591 7682 },
1555d204
AS		 7683 {
7684 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
ef6243ac 7685 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1555d204 7686 .doit = devlink_nl_cmd_dpipe_table_get,
67ae686b 7687 /* can be retrieved by unprivileged users */
1555d204
AS		 7688 },
7689 {
7690 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
ef6243ac 7691 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1555d204 7692 .doit = devlink_nl_cmd_dpipe_entries_get,
67ae686b 7693 /* can be retrieved by unprivileged users */
1555d204
AS		 7694 },
7695 {
7696 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
ef6243ac 7697 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1555d204 7698 .doit = devlink_nl_cmd_dpipe_headers_get,
67ae686b 7699 /* can be retrieved by unprivileged users */
1555d204
AS		 7700 },
7701 {
7702 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
ef6243ac 7703 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1555d204 7704 .doit = devlink_nl_cmd_dpipe_table_counters_set,
1555d204 7705 .flags = GENL_ADMIN_PERM,
1555d204 7706 },
d9f9b9a4
AS		 7707 {
7708 .cmd = DEVLINK_CMD_RESOURCE_SET,
ef6243ac 7709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
d9f9b9a4 7710 .doit = devlink_nl_cmd_resource_set,
d9f9b9a4 7711 .flags = GENL_ADMIN_PERM,
d9f9b9a4
AS		 7712 },
7713 {
7714 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
ef6243ac 7715 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
d9f9b9a4 7716 .doit = devlink_nl_cmd_resource_dump,
67ae686b 7717 /* can be retrieved by unprivileged users */
d9f9b9a4 7718 },
2d8dc5bb
AS		 7719 {
7720 .cmd = DEVLINK_CMD_RELOAD,
ef6243ac 7721 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2d8dc5bb 7722 .doit = devlink_nl_cmd_reload,
2d8dc5bb 7723 .flags = GENL_ADMIN_PERM,
637989b5 7724 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
2d8dc5bb 7725 },
45f05def
MS		 7726 {
7727 .cmd = DEVLINK_CMD_PARAM_GET,
ef6243ac 7728 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
45f05def
MS		 7729 .doit = devlink_nl_cmd_param_get_doit,
7730 .dumpit = devlink_nl_cmd_param_get_dumpit,
45f05def
MS		 7731 /* can be retrieved by unprivileged users */
7732 },
e3b7ca18
MS		 7733 {
7734 .cmd = DEVLINK_CMD_PARAM_SET,
ef6243ac 7735 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
e3b7ca18 7736 .doit = devlink_nl_cmd_param_set_doit,
e3b7ca18 7737 .flags = GENL_ADMIN_PERM,
e3b7ca18 7738 },
f4601dee
VV		 7739 {
7740 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
ef6243ac 7741 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
f4601dee
VV		 7742 .doit = devlink_nl_cmd_port_param_get_doit,
7743 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
f4601dee
VV		 7744 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7745 /* can be retrieved by unprivileged users */
7746 },
9c54873b
VV		 7747 {
7748 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
ef6243ac 7749 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
9c54873b 7750 .doit = devlink_nl_cmd_port_param_set_doit,
9c54873b
VV		 7751 .flags = GENL_ADMIN_PERM,
7752 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7753 },
d8db7ea5
AV		 7754 {
7755 .cmd = DEVLINK_CMD_REGION_GET,
ef6243ac 7756 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
d8db7ea5
AV		 7757 .doit = devlink_nl_cmd_region_get_doit,
7758 .dumpit = devlink_nl_cmd_region_get_dumpit,
d8db7ea5 7759 .flags = GENL_ADMIN_PERM,
d8db7ea5 7760 },
b9a17abf
JK		 7761 {
7762 .cmd = DEVLINK_CMD_REGION_NEW,
7763 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7764 .doit = devlink_nl_cmd_region_new,
7765 .flags = GENL_ADMIN_PERM,
b9a17abf 7766 },
866319bb
AV		 7767 {
7768 .cmd = DEVLINK_CMD_REGION_DEL,
ef6243ac 7769 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
866319bb 7770 .doit = devlink_nl_cmd_region_del,
866319bb 7771 .flags = GENL_ADMIN_PERM,
866319bb 7772 },
4e54795a
AV		 7773 {
7774 .cmd = DEVLINK_CMD_REGION_READ,
ee85da53
JP		 7775 .validate = GENL_DONT_VALIDATE_STRICT |
7776 GENL_DONT_VALIDATE_DUMP_STRICT,
4e54795a 7777 .dumpit = devlink_nl_cmd_region_read_dumpit,
4e54795a 7778 .flags = GENL_ADMIN_PERM,
4e54795a 7779 },
f9cf2288
JK		 7780 {
7781 .cmd = DEVLINK_CMD_INFO_GET,
ef6243ac 7782 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
f9cf2288
JK		 7783 .doit = devlink_nl_cmd_info_get_doit,
7784 .dumpit = devlink_nl_cmd_info_get_dumpit,
f9cf2288
JK		 7785 /* can be retrieved by unprivileged users */
7786 },
7afe335a
EBE		 7787 {
7788 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
ef6243ac 7789 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7afe335a
EBE		 7790 .doit = devlink_nl_cmd_health_reporter_get_doit,
7791 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
f4f54166 7792 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
b587bdaf 7793 DEVLINK_NL_FLAG_NO_LOCK,
7afe335a
EBE		 7794 /* can be retrieved by unprivileged users */
7795 },
a1e55ec0
EBE		 7796 {
7797 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
ef6243ac 7798 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
a1e55ec0 7799 .doit = devlink_nl_cmd_health_reporter_set_doit,
a1e55ec0 7800 .flags = GENL_ADMIN_PERM,
f4f54166 7801 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
b587bdaf 7802 DEVLINK_NL_FLAG_NO_LOCK,
a1e55ec0 7803 },
20a0943a
EBE		 7804 {
7805 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
ef6243ac 7806 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
20a0943a 7807 .doit = devlink_nl_cmd_health_reporter_recover_doit,
20a0943a 7808 .flags = GENL_ADMIN_PERM,
f4f54166 7809 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
b587bdaf 7810 DEVLINK_NL_FLAG_NO_LOCK,
20a0943a 7811 },
fca42a27
EBE		 7812 {
7813 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
ef6243ac 7814 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
fca42a27 7815 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
fca42a27 7816 .flags = GENL_ADMIN_PERM,
f4f54166 7817 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
b587bdaf 7818 DEVLINK_NL_FLAG_NO_LOCK,
fca42a27 7819 },
35455e23
EBE		 7820 {
7821 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
82a843de
JP		 7822 .validate = GENL_DONT_VALIDATE_STRICT |
7823 GENL_DONT_VALIDATE_DUMP_STRICT,
e44ef4e4 7824 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
35455e23 7825 .flags = GENL_ADMIN_PERM,
f4f54166 7826 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
35455e23
EBE		 7827 DEVLINK_NL_FLAG_NO_LOCK,
7828 },
7829 {
7830 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
ef6243ac 7831 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
35455e23 7832 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
35455e23 7833 .flags = GENL_ADMIN_PERM,
f4f54166 7834 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
35455e23
EBE		 7835 DEVLINK_NL_FLAG_NO_LOCK,
7836 },
e2ce94dc
JP		 7837 {
7838 .cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST,
7839 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7840 .doit = devlink_nl_cmd_health_reporter_test_doit,
7841 .flags = GENL_ADMIN_PERM,
7842 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7843 DEVLINK_NL_FLAG_NO_LOCK,
7844 },
76726ccb
JK		 7845 {
7846 .cmd = DEVLINK_CMD_FLASH_UPDATE,
ef6243ac 7847 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
76726ccb 7848 .doit = devlink_nl_cmd_flash_update,
76726ccb 7849 .flags = GENL_ADMIN_PERM,
76726ccb 7850 },
0f420b6c
IS		 7851 {
7852 .cmd = DEVLINK_CMD_TRAP_GET,
7853 .doit = devlink_nl_cmd_trap_get_doit,
7854 .dumpit = devlink_nl_cmd_trap_get_dumpit,
0f420b6c
IS		 7855 /* can be retrieved by unprivileged users */
7856 },
7857 {
7858 .cmd = DEVLINK_CMD_TRAP_SET,
7859 .doit = devlink_nl_cmd_trap_set_doit,
7860 .flags = GENL_ADMIN_PERM,
0f420b6c
IS		 7861 },
7862 {
7863 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
7864 .doit = devlink_nl_cmd_trap_group_get_doit,
7865 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
0f420b6c
IS		 7866 /* can be retrieved by unprivileged users */
7867 },
7868 {
7869 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
7870 .doit = devlink_nl_cmd_trap_group_set_doit,
7871 .flags = GENL_ADMIN_PERM,
0f420b6c 7872 },
1e8c6619
IS		 7873 {
7874 .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
7875 .doit = devlink_nl_cmd_trap_policer_get_doit,
7876 .dumpit = devlink_nl_cmd_trap_policer_get_dumpit,
1e8c6619
IS		 7877 /* can be retrieved by unprivileged users */
7878 },
7879 {
7880 .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
7881 .doit = devlink_nl_cmd_trap_policer_set_doit,
7882 .flags = GENL_ADMIN_PERM,
1e8c6619 7883 },
bfcd3a46
JP		 7884};
7885
56989f6d 7886static struct genl_family devlink_nl_family __ro_after_init = {
489111e5
JB		 7887 .name = DEVLINK_GENL_NAME,
7888 .version = DEVLINK_GENL_VERSION,
7889 .maxattr = DEVLINK_ATTR_MAX,
3b0f31f2 7890 .policy = devlink_nl_policy,
489111e5
JB		 7891 .netnsok = true,
7892 .pre_doit = devlink_nl_pre_doit,
7893 .post_doit = devlink_nl_post_doit,
7894 .module = THIS_MODULE,
66a9b928
JK		 7895 .small_ops = devlink_nl_ops,
7896 .n_small_ops = ARRAY_SIZE(devlink_nl_ops),
489111e5
JB		 7897 .mcgrps = devlink_nl_mcgrps,
7898 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
7899};
7900
ccdf0721
MS		 7901static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
7902{
dc64cc7c
MS		 7903 const struct devlink_reload_combination *comb;
7904 int i;
7905
ccdf0721
MS		 7906 if (!devlink_reload_supported(ops)) {
7907 if (WARN_ON(ops->reload_actions))
7908 return false;
7909 return true;
7910 }
7911
7912 if (WARN_ON(!ops->reload_actions ||
7913 ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
7914 ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
7915 return false;
dc64cc7c
MS		 7916
7917 if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
7918 ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
7919 return false;
7920
7921 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) {
7922 comb = &devlink_reload_invalid_combinations[i];
7923 if (ops->reload_actions == BIT(comb->action) &&
7924 ops->reload_limits == BIT(comb->limit))
7925 return false;
7926 }
ccdf0721
MS		 7927 return true;
7928}
7929
bfcd3a46
JP		 7930/**
7931 * devlink_alloc - Allocate new devlink instance resources
7932 *
7933 * @ops: ops
7934 * @priv_size: size of user private data
7935 *
7936 * Allocate new devlink instance resources, including devlink index
7937 * and name.
7938 */
7939struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
7940{
7941 struct devlink *devlink;
7942
be6fe1d8
JK		 7943 if (WARN_ON(!ops))
7944 return NULL;
7945
ccdf0721
MS		 7946 if (!devlink_reload_actions_valid(ops))
7947 return NULL;
7948
bfcd3a46
JP		 7949 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
7950 if (!devlink)
7951 return NULL;
7952 devlink->ops = ops;
12102436 7953 xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
8273fd84 7954 __devlink_net_set(devlink, &init_net);
bfcd3a46 7955 INIT_LIST_HEAD(&devlink->port_list);
bf797471 7956 INIT_LIST_HEAD(&devlink->sb_list);
1555d204 7957 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
d9f9b9a4 7958 INIT_LIST_HEAD(&devlink->resource_list);
eabaef18 7959 INIT_LIST_HEAD(&devlink->param_list);
b16ebe92 7960 INIT_LIST_HEAD(&devlink->region_list);
a0bdcc59 7961 INIT_LIST_HEAD(&devlink->reporter_list);
0f420b6c
IS		 7962 INIT_LIST_HEAD(&devlink->trap_list);
7963 INIT_LIST_HEAD(&devlink->trap_group_list);
1e8c6619 7964 INIT_LIST_HEAD(&devlink->trap_policer_list);
2406e7e5 7965 mutex_init(&devlink->lock);
b587bdaf 7966 mutex_init(&devlink->reporters_lock);
bfcd3a46
JP		 7967 return devlink;
7968}
7969EXPORT_SYMBOL_GPL(devlink_alloc);
7970
7971/**
7972 * devlink_register - Register devlink instance
7973 *
7974 * @devlink: devlink
eeaadd82 7975 * @dev: parent device
bfcd3a46
JP		 7976 */
7977int devlink_register(struct devlink *devlink, struct device *dev)
7978{
bfcd3a46 7979 devlink->dev = dev;
8273fd84 7980 devlink->registered = true;
6553e561 7981 mutex_lock(&devlink_mutex);
bfcd3a46
JP		 7982 list_add_tail(&devlink->list, &devlink_list);
7983 devlink_notify(devlink, DEVLINK_CMD_NEW);
7984 mutex_unlock(&devlink_mutex);
7985 return 0;
7986}
7987EXPORT_SYMBOL_GPL(devlink_register);
7988
7989/**
7990 * devlink_unregister - Unregister devlink instance
7991 *
7992 * @devlink: devlink
7993 */
7994void devlink_unregister(struct devlink *devlink)
7995{
7996 mutex_lock(&devlink_mutex);
69d56e0e 7997 WARN_ON(devlink_reload_supported(devlink->ops) &&
a0c76345 7998 devlink->reload_enabled);
bfcd3a46
JP		 7999 devlink_notify(devlink, DEVLINK_CMD_DEL);
8000 list_del(&devlink->list);
8001 mutex_unlock(&devlink_mutex);
8002}
8003EXPORT_SYMBOL_GPL(devlink_unregister);
8004
a0c76345
JP		 8005/**
8006 * devlink_reload_enable - Enable reload of devlink instance
8007 *
8008 * @devlink: devlink
8009 *
8010 * Should be called at end of device initialization
8011 * process when reload operation is supported.
8012 */
8013void devlink_reload_enable(struct devlink *devlink)
8014{
8015 mutex_lock(&devlink_mutex);
8016 devlink->reload_enabled = true;
8017 mutex_unlock(&devlink_mutex);
8018}
8019EXPORT_SYMBOL_GPL(devlink_reload_enable);
8020
8021/**
8022 * devlink_reload_disable - Disable reload of devlink instance
8023 *
8024 * @devlink: devlink
8025 *
8026 * Should be called at the beginning of device cleanup
8027 * process when reload operation is supported.
8028 */
8029void devlink_reload_disable(struct devlink *devlink)
8030{
8031 mutex_lock(&devlink_mutex);
8032 /* Mutex is taken which ensures that no reload operation is in
8033 * progress while setting up forbidded flag.
8034 */
8035 devlink->reload_enabled = false;
8036 mutex_unlock(&devlink_mutex);
8037}
8038EXPORT_SYMBOL_GPL(devlink_reload_disable);
8039
bfcd3a46
JP		 8040/**
8041 * devlink_free - Free devlink instance resources
8042 *
8043 * @devlink: devlink
8044 */
8045void devlink_free(struct devlink *devlink)
8046{
b587bdaf 8047 mutex_destroy(&devlink->reporters_lock);
375cf8c6 8048 mutex_destroy(&devlink->lock);
1e8c6619 8049 WARN_ON(!list_empty(&devlink->trap_policer_list));
0f420b6c
IS		 8050 WARN_ON(!list_empty(&devlink->trap_group_list));
8051 WARN_ON(!list_empty(&devlink->trap_list));
b904aada
PP		 8052 WARN_ON(!list_empty(&devlink->reporter_list));
8053 WARN_ON(!list_empty(&devlink->region_list));
8054 WARN_ON(!list_empty(&devlink->param_list));
8055 WARN_ON(!list_empty(&devlink->resource_list));
8056 WARN_ON(!list_empty(&devlink->dpipe_table_list));
8057 WARN_ON(!list_empty(&devlink->sb_list));
8058 WARN_ON(!list_empty(&devlink->port_list));
8059
12102436
JK		 8060 xa_destroy(&devlink->snapshot_ids);
8061
bfcd3a46
JP		 8062 kfree(devlink);
8063}
8064EXPORT_SYMBOL_GPL(devlink_free);
8065
136bf27f
JP		 8066static void devlink_port_type_warn(struct work_struct *work)
8067{
8068 WARN(true, "Type was not set for devlink port.");
8069}
8070
8071static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
8072{
8073 /* Ignore CPU and DSA flavours. */
8074 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
cf116634
AL		 8075 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
8076 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
136bf27f
JP		 8077}
8078
4c582234 8079#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
136bf27f
JP		 8080
8081static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
8082{
8083 if (!devlink_port_type_should_warn(devlink_port))
8084 return;
8085 /* Schedule a work to WARN in case driver does not set port
8086 * type within timeout.
8087 */
8088 schedule_delayed_work(&devlink_port->type_warn_dw,
8089 DEVLINK_PORT_TYPE_WARN_TIMEOUT);
8090}
8091
8092static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
8093{
8094 if (!devlink_port_type_should_warn(devlink_port))
8095 return;
8096 cancel_delayed_work_sync(&devlink_port->type_warn_dw);
8097}
8098
bfcd3a46
JP		 8099/**
8100 * devlink_port_register - Register devlink port
8101 *
8102 * @devlink: devlink
8103 * @devlink_port: devlink port
eeaadd82 8104 * @port_index: driver-specific numerical identifier of the port
bfcd3a46
JP		 8105 *
8106 * Register devlink port with provided port index. User can use
8107 * any indexing, even hw-related one. devlink_port structure
8108 * is convenient to be embedded inside user driver private structure.
8109 * Note that the caller should take care of zeroing the devlink_port
8110 * structure.
8111 */
8112int devlink_port_register(struct devlink *devlink,
8113 struct devlink_port *devlink_port,
8114 unsigned int port_index)
8115{
2406e7e5 8116 mutex_lock(&devlink->lock);
bfcd3a46 8117 if (devlink_port_index_exists(devlink, port_index)) {
2406e7e5 8118 mutex_unlock(&devlink->lock);
bfcd3a46
JP		 8119 return -EEXIST;
8120 }
8121 devlink_port->devlink = devlink;
8122 devlink_port->index = port_index;
bfcd3a46 8123 devlink_port->registered = true;
b8f97554 8124 spin_lock_init(&devlink_port->type_lock);
79604c5d
PP		 8125 INIT_LIST_HEAD(&devlink_port->reporter_list);
8126 mutex_init(&devlink_port->reporters_lock);
bfcd3a46 8127 list_add_tail(&devlink_port->list, &devlink->port_list);
39e6160e 8128 INIT_LIST_HEAD(&devlink_port->param_list);
544e7c33 8129 INIT_LIST_HEAD(&devlink_port->region_list);
2406e7e5 8130 mutex_unlock(&devlink->lock);
136bf27f
JP		 8131 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
8132 devlink_port_type_warn_schedule(devlink_port);
bfcd3a46
JP		 8133 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
8134 return 0;
8135}
8136EXPORT_SYMBOL_GPL(devlink_port_register);
8137
8138/**
8139 * devlink_port_unregister - Unregister devlink port
8140 *
8141 * @devlink_port: devlink port
8142 */
8143void devlink_port_unregister(struct devlink_port *devlink_port)
8144{
2406e7e5
AS		 8145 struct devlink *devlink = devlink_port->devlink;
8146
136bf27f 8147 devlink_port_type_warn_cancel(devlink_port);
bfcd3a46 8148 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
2406e7e5 8149 mutex_lock(&devlink->lock);
bfcd3a46 8150 list_del(&devlink_port->list);
2406e7e5 8151 mutex_unlock(&devlink->lock);
79604c5d 8152 WARN_ON(!list_empty(&devlink_port->reporter_list));
544e7c33 8153 WARN_ON(!list_empty(&devlink_port->region_list));
79604c5d 8154 mutex_destroy(&devlink_port->reporters_lock);
bfcd3a46
JP		 8155}
8156EXPORT_SYMBOL_GPL(devlink_port_unregister);
8157
8158static void __devlink_port_type_set(struct devlink_port *devlink_port,
8159 enum devlink_port_type type,
8160 void *type_dev)
8161{
2b239e70
JP		 8162 if (WARN_ON(!devlink_port->registered))
8163 return;
136bf27f 8164 devlink_port_type_warn_cancel(devlink_port);
0f420b6c 8165 spin_lock_bh(&devlink_port->type_lock);
bfcd3a46
JP		 8166 devlink_port->type = type;
8167 devlink_port->type_dev = type_dev;
0f420b6c 8168 spin_unlock_bh(&devlink_port->type_lock);
bfcd3a46
JP		 8169 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
8170}
8171
3ea87ca7
JK		 8172static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
8173 struct net_device *netdev)
bfcd3a46 8174{
119c0b57
JP		 8175 const struct net_device_ops *ops = netdev->netdev_ops;
8176
746364f2
JP		 8177 /* If driver registers devlink port, it should set devlink port
8178 * attributes accordingly so the compat functions are called
8179 * and the original ops are not used.
8180 */
119c0b57 8181 if (ops->ndo_get_phys_port_name) {
746364f2
JP		 8182 /* Some drivers use the same set of ndos for netdevs
8183 * that have devlink_port registered and also for
8184 * those who don't. Make sure that ndo_get_phys_port_name
8185 * returns -EOPNOTSUPP here in case it is defined.
8186 * Warn if not.
8187 */
746364f2
JP		 8188 char name[IFNAMSIZ];
8189 int err;
8190
8191 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
8192 WARN_ON(err != -EOPNOTSUPP);
8193 }
119c0b57
JP		 8194 if (ops->ndo_get_port_parent_id) {
8195 /* Some drivers use the same set of ndos for netdevs
8196 * that have devlink_port registered and also for
8197 * those who don't. Make sure that ndo_get_port_parent_id
8198 * returns -EOPNOTSUPP here in case it is defined.
8199 * Warn if not.
8200 */
8201 struct netdev_phys_item_id ppid;
8202 int err;
8203
8204 err = ops->ndo_get_port_parent_id(netdev, &ppid);
8205 WARN_ON(err != -EOPNOTSUPP);
8206 }
3ea87ca7
JK		 8207}
8208
8209/**
8210 * devlink_port_type_eth_set - Set port type to Ethernet
8211 *
8212 * @devlink_port: devlink port
8213 * @netdev: related netdevice
8214 */
8215void devlink_port_type_eth_set(struct devlink_port *devlink_port,
8216 struct net_device *netdev)
8217{
8218 if (netdev)
8219 devlink_port_type_netdev_checks(devlink_port, netdev);
8220 else
8221 dev_warn(devlink_port->devlink->dev,
8222 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
8223 devlink_port->index);
8224
773b1f38 8225 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
bfcd3a46
JP		 8226}
8227EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
8228
8229/**
8230 * devlink_port_type_ib_set - Set port type to InfiniBand
8231 *
8232 * @devlink_port: devlink port
8233 * @ibdev: related IB device
8234 */
8235void devlink_port_type_ib_set(struct devlink_port *devlink_port,
8236 struct ib_device *ibdev)
8237{
773b1f38 8238 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
bfcd3a46
JP		 8239}
8240EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
8241
8242/**
8243 * devlink_port_type_clear - Clear port type
8244 *
8245 * @devlink_port: devlink port
8246 */
8247void devlink_port_type_clear(struct devlink_port *devlink_port)
8248{
773b1f38 8249 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
136bf27f 8250 devlink_port_type_warn_schedule(devlink_port);
bfcd3a46
JP		 8251}
8252EXPORT_SYMBOL_GPL(devlink_port_type_clear);
8253
378ef01b 8254static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
71ad8d55 8255 enum devlink_port_flavour flavour)
378ef01b
PP		 8256{
8257 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8258
10a429ba 8259 devlink_port->attrs_set = true;
378ef01b 8260 attrs->flavour = flavour;
71ad8d55 8261 if (attrs->switch_id.id_len) {
46737a19 8262 devlink_port->switch_port = true;
71ad8d55
DR		 8263 if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
8264 attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
378ef01b 8265 } else {
46737a19 8266 devlink_port->switch_port = false;
378ef01b
PP		 8267 }
8268 return 0;
8269}
8270
bfcd3a46 8271/**
b9ffcbaf 8272 * devlink_port_attrs_set - Set port attributes
bfcd3a46
JP		 8273 *
8274 * @devlink_port: devlink port
71ad8d55 8275 * @attrs: devlink port attrs
bfcd3a46 8276 */
b9ffcbaf 8277void devlink_port_attrs_set(struct devlink_port *devlink_port,
71ad8d55 8278 struct devlink_port_attrs *attrs)
bfcd3a46 8279{
378ef01b 8280 int ret;
b9ffcbaf 8281
9f73bd1c
PP		 8282 if (WARN_ON(devlink_port->registered))
8283 return;
71ad8d55
DR		 8284 devlink_port->attrs = *attrs;
8285 ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
378ef01b 8286 if (ret)
45b86112 8287 return;
a0f49b54 8288 WARN_ON(attrs->splittable && attrs->split);
bfcd3a46 8289}
b9ffcbaf 8290EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
bfcd3a46 8291
98fd2d65
PP		 8292/**
8293 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
8294 *
8295 * @devlink_port: devlink port
3a2d9588 8296 * @controller: associated controller number for the devlink port instance
98fd2d65 8297 * @pf: associated PF for the devlink port instance
05b595e9 8298 * @external: indicates if the port is for an external controller
98fd2d65 8299 */
3a2d9588
PP		 8300void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
8301 u16 pf, bool external)
98fd2d65
PP		 8302{
8303 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8304 int ret;
8305
9f73bd1c
PP		 8306 if (WARN_ON(devlink_port->registered))
8307 return;
98fd2d65 8308 ret = __devlink_port_attrs_set(devlink_port,
71ad8d55 8309 DEVLINK_PORT_FLAVOUR_PCI_PF);
98fd2d65
PP		 8310 if (ret)
8311 return;
3a2d9588 8312 attrs->pci_pf.controller = controller;
98fd2d65 8313 attrs->pci_pf.pf = pf;
05b595e9 8314 attrs->pci_pf.external = external;
98fd2d65
PP		 8315}
8316EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
8317
e41b6bf3
PP		 8318/**
8319 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
8320 *
8321 * @devlink_port: devlink port
3a2d9588 8322 * @controller: associated controller number for the devlink port instance
e41b6bf3
PP		 8323 * @pf: associated PF for the devlink port instance
8324 * @vf: associated VF of a PF for the devlink port instance
05b595e9 8325 * @external: indicates if the port is for an external controller
e41b6bf3 8326 */
3a2d9588 8327void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
05b595e9 8328 u16 pf, u16 vf, bool external)
e41b6bf3
PP		 8329{
8330 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8331 int ret;
8332
9f73bd1c
PP		 8333 if (WARN_ON(devlink_port->registered))
8334 return;
e41b6bf3 8335 ret = __devlink_port_attrs_set(devlink_port,
71ad8d55 8336 DEVLINK_PORT_FLAVOUR_PCI_VF);
e41b6bf3
PP		 8337 if (ret)
8338 return;
3a2d9588 8339 attrs->pci_vf.controller = controller;
e41b6bf3
PP		 8340 attrs->pci_vf.pf = pf;
8341 attrs->pci_vf.vf = vf;
05b595e9 8342 attrs->pci_vf.external = external;
e41b6bf3
PP		 8343}
8344EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
8345
af3836df
JP		 8346static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
8347 char *name, size_t len)
08474c1a
JP		 8348{
8349 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8350 int n = 0;
8351
10a429ba 8352 if (!devlink_port->attrs_set)
08474c1a
JP		 8353 return -EOPNOTSUPP;
8354
8355 switch (attrs->flavour) {
8356 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
acf1ee44 8357 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
08474c1a 8358 if (!attrs->split)
378ef01b 8359 n = snprintf(name, len, "p%u", attrs->phys.port_number);
08474c1a 8360 else
378ef01b
PP		 8361 n = snprintf(name, len, "p%us%u",
8362 attrs->phys.port_number,
8363 attrs->phys.split_subport_number);
08474c1a
JP		 8364 break;
8365 case DEVLINK_PORT_FLAVOUR_CPU:
8366 case DEVLINK_PORT_FLAVOUR_DSA:
cf116634 8367 case DEVLINK_PORT_FLAVOUR_UNUSED:
08474c1a
JP		 8368 /* As CPU and DSA ports do not have a netdevice associated
8369 * case should not ever happen.
8370 */
8371 WARN_ON(1);
8372 return -EINVAL;
98fd2d65 8373 case DEVLINK_PORT_FLAVOUR_PCI_PF:
66b17082
PP		 8374 if (attrs->pci_pf.external) {
8375 n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
8376 if (n >= len)
8377 return -EINVAL;
8378 len -= n;
8379 name += n;
8380 }
98fd2d65
PP		 8381 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
8382 break;
e41b6bf3 8383 case DEVLINK_PORT_FLAVOUR_PCI_VF:
66b17082
PP		 8384 if (attrs->pci_vf.external) {
8385 n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
8386 if (n >= len)
8387 return -EINVAL;
8388 len -= n;
8389 name += n;
8390 }
e41b6bf3
PP		 8391 n = snprintf(name, len, "pf%uvf%u",
8392 attrs->pci_vf.pf, attrs->pci_vf.vf);
8393 break;
08474c1a
JP		 8394 }
8395
8396 if (n >= len)
8397 return -EINVAL;
8398
8399 return 0;
8400}
af3836df 8401
bf797471
JP		 8402int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
8403 u32 size, u16 ingress_pools_count,
8404 u16 egress_pools_count, u16 ingress_tc_count,
8405 u16 egress_tc_count)
8406{
8407 struct devlink_sb *devlink_sb;
8408 int err = 0;
8409
2406e7e5 8410 mutex_lock(&devlink->lock);
bf797471
JP		 8411 if (devlink_sb_index_exists(devlink, sb_index)) {
8412 err = -EEXIST;
8413 goto unlock;
8414 }
8415
8416 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
8417 if (!devlink_sb) {
8418 err = -ENOMEM;
8419 goto unlock;
8420 }
8421 devlink_sb->index = sb_index;
8422 devlink_sb->size = size;
8423 devlink_sb->ingress_pools_count = ingress_pools_count;
8424 devlink_sb->egress_pools_count = egress_pools_count;
8425 devlink_sb->ingress_tc_count = ingress_tc_count;
8426 devlink_sb->egress_tc_count = egress_tc_count;
8427 list_add_tail(&devlink_sb->list, &devlink->sb_list);
8428unlock:
2406e7e5 8429 mutex_unlock(&devlink->lock);
bf797471
JP		 8430 return err;
8431}
8432EXPORT_SYMBOL_GPL(devlink_sb_register);
8433
8434void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
8435{
8436 struct devlink_sb *devlink_sb;
8437
2406e7e5 8438 mutex_lock(&devlink->lock);
bf797471
JP		 8439 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
8440 WARN_ON(!devlink_sb);
8441 list_del(&devlink_sb->list);
2406e7e5 8442 mutex_unlock(&devlink->lock);
bf797471
JP		 8443 kfree(devlink_sb);
8444}
8445EXPORT_SYMBOL_GPL(devlink_sb_unregister);
8446
1555d204
AS		 8447/**
8448 * devlink_dpipe_headers_register - register dpipe headers
8449 *
8450 * @devlink: devlink
8451 * @dpipe_headers: dpipe header array
8452 *
8453 * Register the headers supported by hardware.
8454 */
8455int devlink_dpipe_headers_register(struct devlink *devlink,
8456 struct devlink_dpipe_headers *dpipe_headers)
8457{
2406e7e5 8458 mutex_lock(&devlink->lock);
1555d204 8459 devlink->dpipe_headers = dpipe_headers;
2406e7e5 8460 mutex_unlock(&devlink->lock);
1555d204
AS		 8461 return 0;
8462}
8463EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
8464
8465/**
8466 * devlink_dpipe_headers_unregister - unregister dpipe headers
8467 *
8468 * @devlink: devlink
8469 *
8470 * Unregister the headers supported by hardware.
8471 */
8472void devlink_dpipe_headers_unregister(struct devlink *devlink)
8473{
2406e7e5 8474 mutex_lock(&devlink->lock);
1555d204 8475 devlink->dpipe_headers = NULL;
2406e7e5 8476 mutex_unlock(&devlink->lock);
1555d204
AS		 8477}
8478EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
8479
8480/**
8481 * devlink_dpipe_table_counter_enabled - check if counter allocation
8482 * required
8483 * @devlink: devlink
8484 * @table_name: tables name
8485 *
8486 * Used by driver to check if counter allocation is required.
8487 * After counter allocation is turned on the table entries
8488 * are updated to include counter statistics.
8489 *
8490 * After that point on the driver must respect the counter
8491 * state so that each entry added to the table is added
8492 * with a counter.
8493 */
8494bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
8495 const char *table_name)
8496{
8497 struct devlink_dpipe_table *table;
8498 bool enabled;
8499
8500 rcu_read_lock();
8501 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2eb51c75 8502 table_name, devlink);
1555d204
AS		 8503 enabled = false;
8504 if (table)
8505 enabled = table->counters_enabled;
8506 rcu_read_unlock();
8507 return enabled;
8508}
8509EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
8510
8511/**
8512 * devlink_dpipe_table_register - register dpipe table
8513 *
8514 * @devlink: devlink
8515 * @table_name: table name
8516 * @table_ops: table ops
8517 * @priv: priv
1555d204
AS		 8518 * @counter_control_extern: external control for counters
8519 */
8520int devlink_dpipe_table_register(struct devlink *devlink,
8521 const char *table_name,
8522 struct devlink_dpipe_table_ops *table_ops,
ffd3cdcc 8523 void *priv, bool counter_control_extern)
1555d204
AS		 8524{
8525 struct devlink_dpipe_table *table;
6132c1d9 8526 int err = 0;
1555d204 8527
ffd3cdcc
AS		 8528 if (WARN_ON(!table_ops->size_get))
8529 return -EINVAL;
8530
6132c1d9
MB		 8531 mutex_lock(&devlink->lock);
8532
2eb51c75
MB		 8533 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
8534 devlink)) {
6132c1d9
MB		 8535 err = -EEXIST;
8536 goto unlock;
8537 }
8538
1555d204 8539 table = kzalloc(sizeof(*table), GFP_KERNEL);
6132c1d9
MB		 8540 if (!table) {
8541 err = -ENOMEM;
8542 goto unlock;
8543 }
1555d204
AS		 8544
8545 table->name = table_name;
8546 table->table_ops = table_ops;
8547 table->priv = priv;
1555d204
AS		 8548 table->counter_control_extern = counter_control_extern;
8549
1555d204 8550 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6132c1d9 8551unlock:
2406e7e5 8552 mutex_unlock(&devlink->lock);
6132c1d9 8553 return err;
1555d204
AS		 8554}
8555EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
8556
8557/**
8558 * devlink_dpipe_table_unregister - unregister dpipe table
8559 *
8560 * @devlink: devlink
8561 * @table_name: table name
8562 */
8563void devlink_dpipe_table_unregister(struct devlink *devlink,
8564 const char *table_name)
8565{
8566 struct devlink_dpipe_table *table;
8567
2406e7e5 8568 mutex_lock(&devlink->lock);
1555d204 8569 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2eb51c75 8570 table_name, devlink);
1555d204
AS		 8571 if (!table)
8572 goto unlock;
8573 list_del_rcu(&table->list);
2406e7e5 8574 mutex_unlock(&devlink->lock);
1555d204
AS		 8575 kfree_rcu(table, rcu);
8576 return;
8577unlock:
2406e7e5 8578 mutex_unlock(&devlink->lock);
1555d204
AS		 8579}
8580EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
8581
d9f9b9a4
AS		 8582/**
8583 * devlink_resource_register - devlink resource register
8584 *
8585 * @devlink: devlink
8586 * @resource_name: resource's name
d9f9b9a4
AS		 8587 * @resource_size: resource's size
8588 * @resource_id: resource's id
eeaadd82
JK		 8589 * @parent_resource_id: resource's parent id
8590 * @size_params: size parameters
d9f9b9a4
AS		 8591 */
8592int devlink_resource_register(struct devlink *devlink,
8593 const char *resource_name,
d9f9b9a4
AS		 8594 u64 resource_size,
8595 u64 resource_id,
8596 u64 parent_resource_id,
fc56be47 8597 const struct devlink_resource_size_params *size_params)
d9f9b9a4
AS		 8598{
8599 struct devlink_resource *resource;
8600 struct list_head *resource_list;
14530746 8601 bool top_hierarchy;
d9f9b9a4
AS		 8602 int err = 0;
8603
14530746
DA		 8604 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
8605
d9f9b9a4
AS		 8606 mutex_lock(&devlink->lock);
8607 resource = devlink_resource_find(devlink, NULL, resource_id);
8608 if (resource) {
8609 err = -EINVAL;
8610 goto out;
8611 }
8612
8613 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
8614 if (!resource) {
8615 err = -ENOMEM;
8616 goto out;
8617 }
8618
8619 if (top_hierarchy) {
8620 resource_list = &devlink->resource_list;
8621 } else {
8622 struct devlink_resource *parent_resource;
8623
8624 parent_resource = devlink_resource_find(devlink, NULL,
8625 parent_resource_id);
8626 if (parent_resource) {
8627 resource_list = &parent_resource->resource_list;
8628 resource->parent = parent_resource;
8629 } else {
b75703de 8630 kfree(resource);
d9f9b9a4
AS		 8631 err = -EINVAL;
8632 goto out;
8633 }
8634 }
8635
8636 resource->name = resource_name;
8637 resource->size = resource_size;
8638 resource->size_new = resource_size;
8639 resource->id = resource_id;
d9f9b9a4 8640 resource->size_valid = true;
77d27096
JP		 8641 memcpy(&resource->size_params, size_params,
8642 sizeof(resource->size_params));
d9f9b9a4
AS		 8643 INIT_LIST_HEAD(&resource->resource_list);
8644 list_add_tail(&resource->list, resource_list);
8645out:
8646 mutex_unlock(&devlink->lock);
8647 return err;
8648}
8649EXPORT_SYMBOL_GPL(devlink_resource_register);
8650
8651/**
8652 * devlink_resources_unregister - free all resources
8653 *
8654 * @devlink: devlink
8655 * @resource: resource
8656 */
8657void devlink_resources_unregister(struct devlink *devlink,
8658 struct devlink_resource *resource)
8659{
8660 struct devlink_resource *tmp, *child_resource;
8661 struct list_head *resource_list;
8662
8663 if (resource)
8664 resource_list = &resource->resource_list;
8665 else
8666 resource_list = &devlink->resource_list;
8667
8668 if (!resource)
8669 mutex_lock(&devlink->lock);
8670
8671 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
8672 devlink_resources_unregister(devlink, child_resource);
8673 list_del(&child_resource->list);
8674 kfree(child_resource);
8675 }
8676
8677 if (!resource)
8678 mutex_unlock(&devlink->lock);
8679}
8680EXPORT_SYMBOL_GPL(devlink_resources_unregister);
8681
8682/**
8683 * devlink_resource_size_get - get and update size
8684 *
8685 * @devlink: devlink
8686 * @resource_id: the requested resource id
8687 * @p_resource_size: ptr to update
8688 */
8689int devlink_resource_size_get(struct devlink *devlink,
8690 u64 resource_id,
8691 u64 *p_resource_size)
8692{
8693 struct devlink_resource *resource;
8694 int err = 0;
8695
8696 mutex_lock(&devlink->lock);
8697 resource = devlink_resource_find(devlink, NULL, resource_id);
8698 if (!resource) {
8699 err = -EINVAL;
8700 goto out;
8701 }
8702 *p_resource_size = resource->size_new;
8703 resource->size = resource->size_new;
8704out:
8705 mutex_unlock(&devlink->lock);
8706 return err;
8707}
8708EXPORT_SYMBOL_GPL(devlink_resource_size_get);
8709
56dc7cd0
AS		 8710/**
8711 * devlink_dpipe_table_resource_set - set the resource id
8712 *
8713 * @devlink: devlink
8714 * @table_name: table name
8715 * @resource_id: resource id
8716 * @resource_units: number of resource's units consumed per table's entry
8717 */
8718int devlink_dpipe_table_resource_set(struct devlink *devlink,
8719 const char *table_name, u64 resource_id,
8720 u64 resource_units)
8721{
8722 struct devlink_dpipe_table *table;
8723 int err = 0;
8724
8725 mutex_lock(&devlink->lock);
8726 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2eb51c75 8727 table_name, devlink);
56dc7cd0
AS		 8728 if (!table) {
8729 err = -EINVAL;
8730 goto out;
8731 }
8732 table->resource_id = resource_id;
8733 table->resource_units = resource_units;
8734 table->resource_valid = true;
8735out:
8736 mutex_unlock(&devlink->lock);
8737 return err;
8738}
8739EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
8740
fc56be47
JP		 8741/**
8742 * devlink_resource_occ_get_register - register occupancy getter
8743 *
8744 * @devlink: devlink
8745 * @resource_id: resource id
8746 * @occ_get: occupancy getter callback
8747 * @occ_get_priv: occupancy getter callback priv
8748 */
8749void devlink_resource_occ_get_register(struct devlink *devlink,
8750 u64 resource_id,
8751 devlink_resource_occ_get_t *occ_get,
8752 void *occ_get_priv)
8753{
8754 struct devlink_resource *resource;
8755
8756 mutex_lock(&devlink->lock);
8757 resource = devlink_resource_find(devlink, NULL, resource_id);
8758 if (WARN_ON(!resource))
8759 goto out;
8760 WARN_ON(resource->occ_get);
8761
8762 resource->occ_get = occ_get;
8763 resource->occ_get_priv = occ_get_priv;
8764out:
8765 mutex_unlock(&devlink->lock);
8766}
8767EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
8768
8769/**
8770 * devlink_resource_occ_get_unregister - unregister occupancy getter
8771 *
8772 * @devlink: devlink
8773 * @resource_id: resource id
8774 */
8775void devlink_resource_occ_get_unregister(struct devlink *devlink,
8776 u64 resource_id)
8777{
8778 struct devlink_resource *resource;
8779
8780 mutex_lock(&devlink->lock);
8781 resource = devlink_resource_find(devlink, NULL, resource_id);
8782 if (WARN_ON(!resource))
8783 goto out;
8784 WARN_ON(!resource->occ_get);
8785
8786 resource->occ_get = NULL;
8787 resource->occ_get_priv = NULL;
8788out:
8789 mutex_unlock(&devlink->lock);
8790}
8791EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
8792
39e6160e
VV		 8793static int devlink_param_verify(const struct devlink_param *param)
8794{
8795 if (!param || !param->name || !param->supported_cmodes)
8796 return -EINVAL;
8797 if (param->generic)
8798 return devlink_param_generic_verify(param);
8799 else
8800 return devlink_param_driver_verify(param);
8801}
8802
8803static int __devlink_params_register(struct devlink *devlink,
c1e5786d 8804 unsigned int port_index,
39e6160e
VV		 8805 struct list_head *param_list,
8806 const struct devlink_param *params,
c1e5786d
VV		 8807 size_t params_count,
8808 enum devlink_command reg_cmd,
8809 enum devlink_command unreg_cmd)
eabaef18
MS		 8810{
8811 const struct devlink_param *param = params;
8812 int i;
8813 int err;
8814
8815 mutex_lock(&devlink->lock);
8816 for (i = 0; i < params_count; i++, param++) {
39e6160e
VV		 8817 err = devlink_param_verify(param);
8818 if (err)
eabaef18 8819 goto rollback;
39e6160e 8820
c1e5786d
VV		 8821 err = devlink_param_register_one(devlink, port_index,
8822 param_list, param, reg_cmd);
eabaef18
MS		 8823 if (err)
8824 goto rollback;
8825 }
8826
8827 mutex_unlock(&devlink->lock);
8828 return 0;
8829
8830rollback:
8831 if (!i)
8832 goto unlock;
8833 for (param--; i > 0; i--, param--)
c1e5786d
VV		 8834 devlink_param_unregister_one(devlink, port_index, param_list,
8835 param, unreg_cmd);
eabaef18
MS		 8836unlock:
8837 mutex_unlock(&devlink->lock);
8838 return err;
8839}
39e6160e
VV		 8840
8841static void __devlink_params_unregister(struct devlink *devlink,
c1e5786d 8842 unsigned int port_index,
39e6160e
VV		 8843 struct list_head *param_list,
8844 const struct devlink_param *params,
c1e5786d
VV		 8845 size_t params_count,
8846 enum devlink_command cmd)
39e6160e
VV		 8847{
8848 const struct devlink_param *param = params;
8849 int i;
8850
8851 mutex_lock(&devlink->lock);
8852 for (i = 0; i < params_count; i++, param++)
c1e5786d
VV		 8853 devlink_param_unregister_one(devlink, 0, param_list, param,
8854 cmd);
39e6160e
VV		 8855 mutex_unlock(&devlink->lock);
8856}
8857
8858/**
8859 * devlink_params_register - register configuration parameters
8860 *
8861 * @devlink: devlink
8862 * @params: configuration parameters array
8863 * @params_count: number of parameters provided
8864 *
8865 * Register the configuration parameters supported by the driver.
8866 */
8867int devlink_params_register(struct devlink *devlink,
8868 const struct devlink_param *params,
8869 size_t params_count)
8870{
c1e5786d
VV		 8871 return __devlink_params_register(devlink, 0, &devlink->param_list,
8872 params, params_count,
8873 DEVLINK_CMD_PARAM_NEW,
8874 DEVLINK_CMD_PARAM_DEL);
39e6160e 8875}
eabaef18
MS		 8876EXPORT_SYMBOL_GPL(devlink_params_register);
8877
8878/**
8879 * devlink_params_unregister - unregister configuration parameters
8880 * @devlink: devlink
8881 * @params: configuration parameters to unregister
8882 * @params_count: number of parameters provided
8883 */
8884void devlink_params_unregister(struct devlink *devlink,
8885 const struct devlink_param *params,
8886 size_t params_count)
8887{
c1e5786d
VV		 8888 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
8889 params, params_count,
8890 DEVLINK_CMD_PARAM_DEL);
eabaef18
MS		 8891}
8892EXPORT_SYMBOL_GPL(devlink_params_unregister);
8893
7c62cfb8
JP		 8894/**
8895 * devlink_params_publish - publish configuration parameters
8896 *
8897 * @devlink: devlink
8898 *
8899 * Publish previously registered configuration parameters.
8900 */
8901void devlink_params_publish(struct devlink *devlink)
8902{
8903 struct devlink_param_item *param_item;
8904
8905 list_for_each_entry(param_item, &devlink->param_list, list) {
8906 if (param_item->published)
8907 continue;
8908 param_item->published = true;
8909 devlink_param_notify(devlink, 0, param_item,
8910 DEVLINK_CMD_PARAM_NEW);
8911 }
8912}
8913EXPORT_SYMBOL_GPL(devlink_params_publish);
8914
8915/**
8916 * devlink_params_unpublish - unpublish configuration parameters
8917 *
8918 * @devlink: devlink
8919 *
8920 * Unpublish previously registered configuration parameters.
8921 */
8922void devlink_params_unpublish(struct devlink *devlink)
8923{
8924 struct devlink_param_item *param_item;
8925
8926 list_for_each_entry(param_item, &devlink->param_list, list) {
8927 if (!param_item->published)
8928 continue;
8929 param_item->published = false;
8930 devlink_param_notify(devlink, 0, param_item,
8931 DEVLINK_CMD_PARAM_DEL);
8932 }
8933}
8934EXPORT_SYMBOL_GPL(devlink_params_unpublish);
8935
39e6160e
VV		 8936/**
8937 * devlink_port_params_register - register port configuration parameters
8938 *
8939 * @devlink_port: devlink port
8940 * @params: configuration parameters array
8941 * @params_count: number of parameters provided
8942 *
8943 * Register the configuration parameters supported by the port.
8944 */
8945int devlink_port_params_register(struct devlink_port *devlink_port,
8946 const struct devlink_param *params,
8947 size_t params_count)
8948{
8949 return __devlink_params_register(devlink_port->devlink,
c1e5786d 8950 devlink_port->index,
39e6160e 8951 &devlink_port->param_list, params,
c1e5786d
VV		 8952 params_count,
8953 DEVLINK_CMD_PORT_PARAM_NEW,
8954 DEVLINK_CMD_PORT_PARAM_DEL);
39e6160e
VV		 8955}
8956EXPORT_SYMBOL_GPL(devlink_port_params_register);
8957
8958/**
8959 * devlink_port_params_unregister - unregister port configuration
8960 * parameters
8961 *
8962 * @devlink_port: devlink port
8963 * @params: configuration parameters array
8964 * @params_count: number of parameters provided
8965 */
8966void devlink_port_params_unregister(struct devlink_port *devlink_port,
8967 const struct devlink_param *params,
8968 size_t params_count)
8969{
8970 return __devlink_params_unregister(devlink_port->devlink,
c1e5786d 8971 devlink_port->index,
39e6160e 8972 &devlink_port->param_list,
c1e5786d
VV		 8973 params, params_count,
8974 DEVLINK_CMD_PORT_PARAM_DEL);
39e6160e
VV		 8975}
8976EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
8977
ffd19b9a
VV		 8978static int
8979__devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
8980 union devlink_param_value *init_val)
ec01aeb1
MS		 8981{
8982 struct devlink_param_item *param_item;
8983
ffd19b9a 8984 param_item = devlink_param_find_by_id(param_list, param_id);
ec01aeb1
MS		 8985 if (!param_item)
8986 return -EINVAL;
8987
8988 if (!param_item->driverinit_value_valid ||
8989 !devlink_param_cmode_is_supported(param_item->param,
8990 DEVLINK_PARAM_CMODE_DRIVERINIT))
8991 return -EOPNOTSUPP;
8992
1276534c
MS		 8993 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8994 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
8995 else
8996 *init_val = param_item->driverinit_value;
ec01aeb1
MS		 8997
8998 return 0;
8999}
ffd19b9a 9000
5473a7bd
VV		 9001static int
9002__devlink_param_driverinit_value_set(struct devlink *devlink,
c1e5786d 9003 unsigned int port_index,
5473a7bd
VV		 9004 struct list_head *param_list, u32 param_id,
9005 union devlink_param_value init_val,
9006 enum devlink_command cmd)
9007{
9008 struct devlink_param_item *param_item;
9009
9010 param_item = devlink_param_find_by_id(param_list, param_id);
9011 if (!param_item)
9012 return -EINVAL;
9013
9014 if (!devlink_param_cmode_is_supported(param_item->param,
9015 DEVLINK_PARAM_CMODE_DRIVERINIT))
9016 return -EOPNOTSUPP;
9017
9018 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
9019 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
9020 else
9021 param_item->driverinit_value = init_val;
9022 param_item->driverinit_value_valid = true;
9023
c1e5786d 9024 devlink_param_notify(devlink, port_index, param_item, cmd);
5473a7bd
VV		 9025 return 0;
9026}
9027
ffd19b9a
VV		 9028/**
9029 * devlink_param_driverinit_value_get - get configuration parameter
9030 * value for driver initializing
9031 *
9032 * @devlink: devlink
9033 * @param_id: parameter ID
9034 * @init_val: value of parameter in driverinit configuration mode
9035 *
9036 * This function should be used by the driver to get driverinit
9037 * configuration for initialization after reload command.
9038 */
9039int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
9040 union devlink_param_value *init_val)
9041{
69d56e0e 9042 if (!devlink_reload_supported(devlink->ops))
ffd19b9a
VV		 9043 return -EOPNOTSUPP;
9044
9045 return __devlink_param_driverinit_value_get(&devlink->param_list,
9046 param_id, init_val);
9047}
ec01aeb1
MS		 9048EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
9049
9050/**
9051 * devlink_param_driverinit_value_set - set value of configuration
9052 * parameter for driverinit
9053 * configuration mode
9054 *
9055 * @devlink: devlink
9056 * @param_id: parameter ID
9057 * @init_val: value of parameter to set for driverinit configuration mode
9058 *
9059 * This function should be used by the driver to set driverinit
9060 * configuration mode default value.
9061 */
9062int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
9063 union devlink_param_value init_val)
9064{
c1e5786d 9065 return __devlink_param_driverinit_value_set(devlink, 0,
5473a7bd
VV		 9066 &devlink->param_list,
9067 param_id, init_val,
9068 DEVLINK_CMD_PARAM_NEW);
ec01aeb1
MS		 9069}
9070EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
9071
ffd19b9a
VV		 9072/**
9073 * devlink_port_param_driverinit_value_get - get configuration parameter
9074 * value for driver initializing
9075 *
9076 * @devlink_port: devlink_port
9077 * @param_id: parameter ID
9078 * @init_val: value of parameter in driverinit configuration mode
9079 *
9080 * This function should be used by the driver to get driverinit
9081 * configuration for initialization after reload command.
9082 */
9083int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
9084 u32 param_id,
9085 union devlink_param_value *init_val)
9086{
9087 struct devlink *devlink = devlink_port->devlink;
9088
69d56e0e 9089 if (!devlink_reload_supported(devlink->ops))
ffd19b9a
VV		 9090 return -EOPNOTSUPP;
9091
9092 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
9093 param_id, init_val);
9094}
9095EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
9096
5473a7bd
VV		 9097/**
9098 * devlink_port_param_driverinit_value_set - set value of configuration
9099 * parameter for driverinit
9100 * configuration mode
9101 *
9102 * @devlink_port: devlink_port
9103 * @param_id: parameter ID
9104 * @init_val: value of parameter to set for driverinit configuration mode
9105 *
9106 * This function should be used by the driver to set driverinit
9107 * configuration mode default value.
9108 */
9109int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
9110 u32 param_id,
9111 union devlink_param_value init_val)
9112{
9113 return __devlink_param_driverinit_value_set(devlink_port->devlink,
c1e5786d 9114 devlink_port->index,
5473a7bd 9115 &devlink_port->param_list,
c1e5786d
VV		 9116 param_id, init_val,
9117 DEVLINK_CMD_PORT_PARAM_NEW);
5473a7bd
VV		 9118}
9119EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
9120
ea601e17
MS		 9121/**
9122 * devlink_param_value_changed - notify devlink on a parameter's value
9123 * change. Should be called by the driver
9124 * right after the change.
9125 *
9126 * @devlink: devlink
9127 * @param_id: parameter ID
9128 *
9129 * This function should be used by the driver to notify devlink on value
9130 * change, excluding driverinit configuration mode.
9131 * For driverinit configuration mode driver should use the function
ea601e17
MS		 9132 */
9133void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
9134{
9135 struct devlink_param_item *param_item;
9136
9137 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
9138 WARN_ON(!param_item);
9139
c1e5786d 9140 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
ea601e17
MS		 9141}
9142EXPORT_SYMBOL_GPL(devlink_param_value_changed);
9143
c1e5786d
VV		 9144/**
9145 * devlink_port_param_value_changed - notify devlink on a parameter's value
9146 * change. Should be called by the driver
9147 * right after the change.
9148 *
9149 * @devlink_port: devlink_port
9150 * @param_id: parameter ID
9151 *
9152 * This function should be used by the driver to notify devlink on value
9153 * change, excluding driverinit configuration mode.
9154 * For driverinit configuration mode driver should use the function
9155 * devlink_port_param_driverinit_value_set() instead.
9156 */
9157void devlink_port_param_value_changed(struct devlink_port *devlink_port,
9158 u32 param_id)
9159{
9160 struct devlink_param_item *param_item;
9161
9162 param_item = devlink_param_find_by_id(&devlink_port->param_list,
9163 param_id);
9164 WARN_ON(!param_item);
9165
9166 devlink_param_notify(devlink_port->devlink, devlink_port->index,
9167 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
9168}
9169EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
9170
bde74ad1
MS		 9171/**
9172 * devlink_param_value_str_fill - Safely fill-up the string preventing
9173 * from overflow of the preallocated buffer
9174 *
9175 * @dst_val: destination devlink_param_value
9176 * @src: source buffer
9177 */
9178void devlink_param_value_str_fill(union devlink_param_value *dst_val,
9179 const char *src)
9180{
9181 size_t len;
9182
9183 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
9184 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
9185}
9186EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
9187
b16ebe92
AV		 9188/**
9189 * devlink_region_create - create a new address region
9190 *
9191 * @devlink: devlink
e8937681 9192 * @ops: region operations and name
b16ebe92
AV		 9193 * @region_max_snapshots: Maximum supported number of snapshots for region
9194 * @region_size: size of region
9195 */
e8937681
JK		 9196struct devlink_region *
9197devlink_region_create(struct devlink *devlink,
9198 const struct devlink_region_ops *ops,
9199 u32 region_max_snapshots, u64 region_size)
b16ebe92
AV		 9200{
9201 struct devlink_region *region;
9202 int err = 0;
9203
a0a09f6b
JK		 9204 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
9205 return ERR_PTR(-EINVAL);
9206
b16ebe92
AV		 9207 mutex_lock(&devlink->lock);
9208
e8937681 9209 if (devlink_region_get_by_name(devlink, ops->name)) {
b16ebe92
AV		 9210 err = -EEXIST;
9211 goto unlock;
9212 }
9213
9214 region = kzalloc(sizeof(*region), GFP_KERNEL);
9215 if (!region) {
9216 err = -ENOMEM;
9217 goto unlock;
9218 }
9219
9220 region->devlink = devlink;
9221 region->max_snapshots = region_max_snapshots;
e8937681 9222 region->ops = ops;
b16ebe92
AV		 9223 region->size = region_size;
9224 INIT_LIST_HEAD(&region->snapshot_list);
9225 list_add_tail(&region->list, &devlink->region_list);
866319bb 9226 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
b16ebe92
AV		 9227
9228 mutex_unlock(&devlink->lock);
9229 return region;
9230
9231unlock:
9232 mutex_unlock(&devlink->lock);
9233 return ERR_PTR(err);
9234}
9235EXPORT_SYMBOL_GPL(devlink_region_create);
9236
544e7c33
AL		 9237/**
9238 * devlink_port_region_create - create a new address region for a port
9239 *
9240 * @port: devlink port
9241 * @ops: region operations and name
9242 * @region_max_snapshots: Maximum supported number of snapshots for region
9243 * @region_size: size of region
9244 */
9245struct devlink_region *
9246devlink_port_region_create(struct devlink_port *port,
9247 const struct devlink_port_region_ops *ops,
9248 u32 region_max_snapshots, u64 region_size)
9249{
9250 struct devlink *devlink = port->devlink;
9251 struct devlink_region *region;
9252 int err = 0;
9253
9254 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
9255 return ERR_PTR(-EINVAL);
9256
9257 mutex_lock(&devlink->lock);
9258
9259 if (devlink_port_region_get_by_name(port, ops->name)) {
9260 err = -EEXIST;
9261 goto unlock;
9262 }
9263
9264 region = kzalloc(sizeof(*region), GFP_KERNEL);
9265 if (!region) {
9266 err = -ENOMEM;
9267 goto unlock;
9268 }
9269
9270 region->devlink = devlink;
9271 region->port = port;
9272 region->max_snapshots = region_max_snapshots;
9273 region->port_ops = ops;
9274 region->size = region_size;
9275 INIT_LIST_HEAD(&region->snapshot_list);
9276 list_add_tail(&region->list, &port->region_list);
9277 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
9278
9279 mutex_unlock(&devlink->lock);
9280 return region;
9281
9282unlock:
9283 mutex_unlock(&devlink->lock);
9284 return ERR_PTR(err);
9285}
9286EXPORT_SYMBOL_GPL(devlink_port_region_create);
9287
b16ebe92
AV		 9288/**
9289 * devlink_region_destroy - destroy address region
9290 *
9291 * @region: devlink region to destroy
9292 */
9293void devlink_region_destroy(struct devlink_region *region)
9294{
9295 struct devlink *devlink = region->devlink;
d7e52722 9296 struct devlink_snapshot *snapshot, *ts;
b16ebe92
AV		 9297
9298 mutex_lock(&devlink->lock);
d7e52722
AV		 9299
9300 /* Free all snapshots of region */
9301 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
92b49822 9302 devlink_region_snapshot_del(region, snapshot);
d7e52722 9303
b16ebe92 9304 list_del(&region->list);
866319bb
AV		 9305
9306 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
b16ebe92
AV		 9307 mutex_unlock(&devlink->lock);
9308 kfree(region);
9309}
9310EXPORT_SYMBOL_GPL(devlink_region_destroy);
9311
ccadfa44 9312/**
b0efcae5 9313 * devlink_region_snapshot_id_get - get snapshot ID
ccadfa44
AV		 9314 *
9315 * This callback should be called when adding a new snapshot,
9316 * Driver should use the same id for multiple snapshots taken
9317 * on multiple regions at the same time/by the same trigger.
9318 *
12102436
JK		 9319 * The caller of this function must use devlink_region_snapshot_id_put
9320 * when finished creating regions using this id.
9321 *
7ef19d3b
JK		 9322 * Returns zero on success, or a negative error code on failure.
9323 *
ccadfa44 9324 * @devlink: devlink
7ef19d3b 9325 * @id: storage to return id
ccadfa44 9326 */
7ef19d3b 9327int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
ccadfa44 9328{
7ef19d3b 9329 int err;
ccadfa44
AV		 9330
9331 mutex_lock(&devlink->lock);
7ef19d3b 9332 err = __devlink_region_snapshot_id_get(devlink, id);
ccadfa44
AV		 9333 mutex_unlock(&devlink->lock);
9334
7ef19d3b 9335 return err;
ccadfa44 9336}
b0efcae5 9337EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
ccadfa44 9338
12102436
JK		 9339/**
9340 * devlink_region_snapshot_id_put - put snapshot ID reference
9341 *
9342 * This should be called by a driver after finishing creating snapshots
9343 * with an id. Doing so ensures that the ID can later be released in the
9344 * event that all snapshots using it have been destroyed.
9345 *
9346 * @devlink: devlink
9347 * @id: id to release reference on
9348 */
9349void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
9350{
9351 mutex_lock(&devlink->lock);
9352 __devlink_snapshot_id_decrement(devlink, id);
9353 mutex_unlock(&devlink->lock);
9354}
9355EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
9356
d7e52722
AV		 9357/**
9358 * devlink_region_snapshot_create - create a new snapshot
9359 * This will add a new snapshot of a region. The snapshot
9360 * will be stored on the region struct and can be accessed
6d82f67e 9361 * from devlink. This is useful for future analyses of snapshots.
d7e52722
AV		 9362 * Multiple snapshots can be created on a region.
9363 * The @snapshot_id should be obtained using the getter function.
9364 *
eeaadd82 9365 * @region: devlink region of the snapshot
d7e52722
AV		 9366 * @data: snapshot data
9367 * @snapshot_id: snapshot id to be created
d7e52722 9368 */
3a5e5234 9369int devlink_region_snapshot_create(struct devlink_region *region,
a0a09f6b 9370 u8 *data, u32 snapshot_id)
d7e52722
AV		 9371{
9372 struct devlink *devlink = region->devlink;
d7e52722
AV		 9373 int err;
9374
9375 mutex_lock(&devlink->lock);
cf80faee 9376 err = __devlink_region_snapshot_create(region, data, snapshot_id);
d7e52722 9377 mutex_unlock(&devlink->lock);
d7e52722 9378
d7e52722
AV		 9379 return err;
9380}
9381EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
9382
0f420b6c
IS		 9383#define DEVLINK_TRAP(_id, _type) \
9384 { \
9385 .type = DEVLINK_TRAP_TYPE_##_type, \
9386 .id = DEVLINK_TRAP_GENERIC_ID_##_id, \
9387 .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
9388 }
9389
9390static const struct devlink_trap devlink_trap_generic[] = {
391203ab
IS		 9391 DEVLINK_TRAP(SMAC_MC, DROP),
9392 DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
9393 DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
9394 DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
9395 DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
9396 DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
9397 DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
9398 DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
9399 DEVLINK_TRAP(TAIL_DROP, DROP),
6896cc4d
AC		 9400 DEVLINK_TRAP(NON_IP_PACKET, DROP),
9401 DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
9402 DEVLINK_TRAP(DIP_LB, DROP),
9403 DEVLINK_TRAP(SIP_MC, DROP),
9404 DEVLINK_TRAP(SIP_LB, DROP),
9405 DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
9406 DEVLINK_TRAP(IPV4_SIP_BC, DROP),
9407 DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
9408 DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
3b063ae5
AC		 9409 DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
9410 DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
9411 DEVLINK_TRAP(RPF, EXCEPTION),
9412 DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
9413 DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
9414 DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
95f0ead8 9415 DEVLINK_TRAP(NON_ROUTABLE, DROP),
13c056ec 9416 DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
c3cae491 9417 DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
ecd942a0
JP		 9418 DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
9419 DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
515eac67
IS		 9420 DEVLINK_TRAP(STP, CONTROL),
9421 DEVLINK_TRAP(LACP, CONTROL),
9422 DEVLINK_TRAP(LLDP, CONTROL),
9423 DEVLINK_TRAP(IGMP_QUERY, CONTROL),
9424 DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL),
9425 DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL),
9426 DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL),
9427 DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL),
9428 DEVLINK_TRAP(MLD_QUERY, CONTROL),
9429 DEVLINK_TRAP(MLD_V1_REPORT, CONTROL),
9430 DEVLINK_TRAP(MLD_V2_REPORT, CONTROL),
9431 DEVLINK_TRAP(MLD_V1_DONE, CONTROL),
d77cfd16
IS		 9432 DEVLINK_TRAP(IPV4_DHCP, CONTROL),
9433 DEVLINK_TRAP(IPV6_DHCP, CONTROL),
9434 DEVLINK_TRAP(ARP_REQUEST, CONTROL),
9435 DEVLINK_TRAP(ARP_RESPONSE, CONTROL),
9436 DEVLINK_TRAP(ARP_OVERLAY, CONTROL),
9437 DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL),
9438 DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL),
9439 DEVLINK_TRAP(IPV4_BFD, CONTROL),
9440 DEVLINK_TRAP(IPV6_BFD, CONTROL),
9441 DEVLINK_TRAP(IPV4_OSPF, CONTROL),
9442 DEVLINK_TRAP(IPV6_OSPF, CONTROL),
9443 DEVLINK_TRAP(IPV4_BGP, CONTROL),
9444 DEVLINK_TRAP(IPV6_BGP, CONTROL),
9445 DEVLINK_TRAP(IPV4_VRRP, CONTROL),
9446 DEVLINK_TRAP(IPV6_VRRP, CONTROL),
9447 DEVLINK_TRAP(IPV4_PIM, CONTROL),
9448 DEVLINK_TRAP(IPV6_PIM, CONTROL),
9449 DEVLINK_TRAP(UC_LB, CONTROL),
9450 DEVLINK_TRAP(LOCAL_ROUTE, CONTROL),
9451 DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL),
9452 DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL),
9453 DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL),
9454 DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL),
9455 DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL),
9456 DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL),
9457 DEVLINK_TRAP(IPV6_REDIRECT, CONTROL),
9458 DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL),
9459 DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL),
9460 DEVLINK_TRAP(PTP_EVENT, CONTROL),
9461 DEVLINK_TRAP(PTP_GENERAL, CONTROL),
5eb18a2b
IS		 9462 DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL),
9463 DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL),
08e335f6 9464 DEVLINK_TRAP(EARLY_DROP, DROP),
10c24eb2
IC		 9465 DEVLINK_TRAP(VXLAN_PARSING, DROP),
9466 DEVLINK_TRAP(LLC_SNAP_PARSING, DROP),
9467 DEVLINK_TRAP(VLAN_PARSING, DROP),
9468 DEVLINK_TRAP(PPPOE_PPP_PARSING, DROP),
9469 DEVLINK_TRAP(MPLS_PARSING, DROP),
9470 DEVLINK_TRAP(ARP_PARSING, DROP),
9471 DEVLINK_TRAP(IP_1_PARSING, DROP),
9472 DEVLINK_TRAP(IP_N_PARSING, DROP),
9473 DEVLINK_TRAP(GRE_PARSING, DROP),
9474 DEVLINK_TRAP(UDP_PARSING, DROP),
9475 DEVLINK_TRAP(TCP_PARSING, DROP),
9476 DEVLINK_TRAP(IPSEC_PARSING, DROP),
9477 DEVLINK_TRAP(SCTP_PARSING, DROP),
9478 DEVLINK_TRAP(DCCP_PARSING, DROP),
9479 DEVLINK_TRAP(GTP_PARSING, DROP),
9480 DEVLINK_TRAP(ESP_PARSING, DROP),
0f420b6c
IS		 9481};
9482
9483#define DEVLINK_TRAP_GROUP(_id) \
9484 { \
9485 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
9486 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
9487 }
9488
9489static const struct devlink_trap_group devlink_trap_group_generic[] = {
391203ab
IS		 9490 DEVLINK_TRAP_GROUP(L2_DROPS),
9491 DEVLINK_TRAP_GROUP(L3_DROPS),
678eb199 9492 DEVLINK_TRAP_GROUP(L3_EXCEPTIONS),
391203ab 9493 DEVLINK_TRAP_GROUP(BUFFER_DROPS),
13c056ec 9494 DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
ecd942a0 9495 DEVLINK_TRAP_GROUP(ACL_DROPS),
515eac67
IS		 9496 DEVLINK_TRAP_GROUP(STP),
9497 DEVLINK_TRAP_GROUP(LACP),
9498 DEVLINK_TRAP_GROUP(LLDP),
9499 DEVLINK_TRAP_GROUP(MC_SNOOPING),
d77cfd16
IS		 9500 DEVLINK_TRAP_GROUP(DHCP),
9501 DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY),
9502 DEVLINK_TRAP_GROUP(BFD),
9503 DEVLINK_TRAP_GROUP(OSPF),
9504 DEVLINK_TRAP_GROUP(BGP),
9505 DEVLINK_TRAP_GROUP(VRRP),
9506 DEVLINK_TRAP_GROUP(PIM),
9507 DEVLINK_TRAP_GROUP(UC_LB),
9508 DEVLINK_TRAP_GROUP(LOCAL_DELIVERY),
ec4f5b36 9509 DEVLINK_TRAP_GROUP(EXTERNAL_DELIVERY),
d77cfd16
IS		 9510 DEVLINK_TRAP_GROUP(IPV6),
9511 DEVLINK_TRAP_GROUP(PTP_EVENT),
9512 DEVLINK_TRAP_GROUP(PTP_GENERAL),
5eb18a2b
IS		 9513 DEVLINK_TRAP_GROUP(ACL_SAMPLE),
9514 DEVLINK_TRAP_GROUP(ACL_TRAP),
10c24eb2 9515 DEVLINK_TRAP_GROUP(PARSER_ERROR_DROPS),
0f420b6c
IS		 9516};
9517
9518static int devlink_trap_generic_verify(const struct devlink_trap *trap)
9519{
9520 if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
9521 return -EINVAL;
9522
9523 if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
9524 return -EINVAL;
9525
9526 if (trap->type != devlink_trap_generic[trap->id].type)
9527 return -EINVAL;
9528
9529 return 0;
9530}
9531
9532static int devlink_trap_driver_verify(const struct devlink_trap *trap)
9533{
9534 int i;
9535
9536 if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
9537 return -EINVAL;
9538
9539 for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
9540 if (!strcmp(trap->name, devlink_trap_generic[i].name))
9541 return -EEXIST;
9542 }
9543
9544 return 0;
9545}
9546
9547static int devlink_trap_verify(const struct devlink_trap *trap)
9548{
107f1678 9549 if (!trap || !trap->name)
0f420b6c
IS		 9550 return -EINVAL;
9551
9552 if (trap->generic)
9553 return devlink_trap_generic_verify(trap);
9554 else
9555 return devlink_trap_driver_verify(trap);
9556}
9557
9558static int
9559devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
9560{
9561 if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
9562 return -EINVAL;
9563
9564 if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
9565 return -EINVAL;
9566
9567 return 0;
9568}
9569
9570static int
9571devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
9572{
9573 int i;
9574
9575 if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
9576 return -EINVAL;
9577
9578 for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
9579 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
9580 return -EEXIST;
9581 }
9582
9583 return 0;
9584}
9585
9586static int devlink_trap_group_verify(const struct devlink_trap_group *group)
9587{
9588 if (group->generic)
9589 return devlink_trap_group_generic_verify(group);
9590 else
9591 return devlink_trap_group_driver_verify(group);
9592}
9593
9594static void
9595devlink_trap_group_notify(struct devlink *devlink,
9596 const struct devlink_trap_group_item *group_item,
9597 enum devlink_command cmd)
9598{
9599 struct sk_buff *msg;
9600 int err;
9601
9602 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
9603 cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
9604
9605 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9606 if (!msg)
9607 return;
9608
9609 err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
9610 0);
9611 if (err) {
9612 nlmsg_free(msg);
9613 return;
9614 }
9615
9616 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
9617 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
9618}
9619
0f420b6c
IS		 9620static int
9621devlink_trap_item_group_link(struct devlink *devlink,
9622 struct devlink_trap_item *trap_item)
9623{
107f1678 9624 u16 group_id = trap_item->trap->init_group_id;
0f420b6c
IS		 9625 struct devlink_trap_group_item *group_item;
9626
107f1678 9627 group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
a09b37fc
IS		 9628 if (WARN_ON_ONCE(!group_item))
9629 return -EINVAL;
0f420b6c
IS		 9630
9631 trap_item->group_item = group_item;
9632
9633 return 0;
9634}
9635
0f420b6c
IS		 9636static void devlink_trap_notify(struct devlink *devlink,
9637 const struct devlink_trap_item *trap_item,
9638 enum devlink_command cmd)
9639{
9640 struct sk_buff *msg;
9641 int err;
9642
9643 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
9644 cmd != DEVLINK_CMD_TRAP_DEL);
9645
9646 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9647 if (!msg)
9648 return;
9649
9650 err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
9651 if (err) {
9652 nlmsg_free(msg);
9653 return;
9654 }
9655
9656 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
9657 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
9658}
9659
9660static int
9661devlink_trap_register(struct devlink *devlink,
9662 const struct devlink_trap *trap, void *priv)
9663{
9664 struct devlink_trap_item *trap_item;
9665 int err;
9666
9667 if (devlink_trap_item_lookup(devlink, trap->name))
9668 return -EEXIST;
9669
9670 trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
9671 if (!trap_item)
9672 return -ENOMEM;
9673
9674 trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
9675 if (!trap_item->stats) {
9676 err = -ENOMEM;
9677 goto err_stats_alloc;
9678 }
9679
9680 trap_item->trap = trap;
9681 trap_item->action = trap->init_action;
9682 trap_item->priv = priv;
9683
9684 err = devlink_trap_item_group_link(devlink, trap_item);
9685 if (err)
9686 goto err_group_link;
9687
9688 err = devlink->ops->trap_init(devlink, trap, trap_item);
9689 if (err)
9690 goto err_trap_init;
9691
9692 list_add_tail(&trap_item->list, &devlink->trap_list);
9693 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
9694
9695 return 0;
9696
9697err_trap_init:
0f420b6c
IS		 9698err_group_link:
9699 free_percpu(trap_item->stats);
9700err_stats_alloc:
9701 kfree(trap_item);
9702 return err;
9703}
9704
9705static void devlink_trap_unregister(struct devlink *devlink,
9706 const struct devlink_trap *trap)
9707{
9708 struct devlink_trap_item *trap_item;
9709
9710 trap_item = devlink_trap_item_lookup(devlink, trap->name);
9711 if (WARN_ON_ONCE(!trap_item))
9712 return;
9713
9714 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
9715 list_del(&trap_item->list);
9716 if (devlink->ops->trap_fini)
9717 devlink->ops->trap_fini(devlink, trap, trap_item);
0f420b6c
IS		 9718 free_percpu(trap_item->stats);
9719 kfree(trap_item);
9720}
9721
9722static void devlink_trap_disable(struct devlink *devlink,
9723 const struct devlink_trap *trap)
9724{
9725 struct devlink_trap_item *trap_item;
9726
9727 trap_item = devlink_trap_item_lookup(devlink, trap->name);
9728 if (WARN_ON_ONCE(!trap_item))
9729 return;
9730
c88e11e0
IS		 9731 devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP,
9732 NULL);
0f420b6c
IS		 9733 trap_item->action = DEVLINK_TRAP_ACTION_DROP;
9734}
9735
9736/**
9737 * devlink_traps_register - Register packet traps with devlink.
9738 * @devlink: devlink.
9739 * @traps: Packet traps.
9740 * @traps_count: Count of provided packet traps.
9741 * @priv: Driver private information.
9742 *
9743 * Return: Non-zero value on failure.
9744 */
9745int devlink_traps_register(struct devlink *devlink,
9746 const struct devlink_trap *traps,
9747 size_t traps_count, void *priv)
9748{
9749 int i, err;
9750
9751 if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
9752 return -EINVAL;
9753
9754 mutex_lock(&devlink->lock);
9755 for (i = 0; i < traps_count; i++) {
9756 const struct devlink_trap *trap = &traps[i];
9757
9758 err = devlink_trap_verify(trap);
9759 if (err)
9760 goto err_trap_verify;
9761
9762 err = devlink_trap_register(devlink, trap, priv);
9763 if (err)
9764 goto err_trap_register;
9765 }
9766 mutex_unlock(&devlink->lock);
9767
9768 return 0;
9769
9770err_trap_register:
9771err_trap_verify:
9772 for (i--; i >= 0; i--)
9773 devlink_trap_unregister(devlink, &traps[i]);
9774 mutex_unlock(&devlink->lock);
9775 return err;
9776}
9777EXPORT_SYMBOL_GPL(devlink_traps_register);
9778
9779/**
9780 * devlink_traps_unregister - Unregister packet traps from devlink.
9781 * @devlink: devlink.
9782 * @traps: Packet traps.
9783 * @traps_count: Count of provided packet traps.
9784 */
9785void devlink_traps_unregister(struct devlink *devlink,
9786 const struct devlink_trap *traps,
9787 size_t traps_count)
9788{
9789 int i;
9790
9791 mutex_lock(&devlink->lock);
9792 /* Make sure we do not have any packets in-flight while unregistering
9793 * traps by disabling all of them and waiting for a grace period.
9794 */
9795 for (i = traps_count - 1; i >= 0; i--)
9796 devlink_trap_disable(devlink, &traps[i]);
9797 synchronize_rcu();
9798 for (i = traps_count - 1; i >= 0; i--)
9799 devlink_trap_unregister(devlink, &traps[i]);
9800 mutex_unlock(&devlink->lock);
9801}
9802EXPORT_SYMBOL_GPL(devlink_traps_unregister);
9803
9804static void
9805devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
9806 size_t skb_len)
9807{
9808 struct devlink_stats *stats;
9809
9810 stats = this_cpu_ptr(trap_stats);
9811 u64_stats_update_begin(&stats->syncp);
9812 stats->rx_bytes += skb_len;
9813 stats->rx_packets++;
9814 u64_stats_update_end(&stats->syncp);
9815}
9816
5b88823b
IS		 9817static void
9818devlink_trap_report_metadata_set(struct devlink_trap_metadata *metadata,
9819 const struct devlink_trap_item *trap_item,
9820 struct devlink_port *in_devlink_port,
9821 const struct flow_action_cookie *fa_cookie)
9822{
9823 metadata->trap_name = trap_item->trap->name;
9824 metadata->trap_group_name = trap_item->group_item->group->name;
9825 metadata->fa_cookie = fa_cookie;
93e15596 9826 metadata->trap_type = trap_item->trap->type;
5b88823b
IS		 9827
9828 spin_lock(&in_devlink_port->type_lock);
9829 if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
9830 metadata->input_dev = in_devlink_port->type_dev;
9831 spin_unlock(&in_devlink_port->type_lock);
9832}
9833
0f420b6c
IS		 9834/**
9835 * devlink_trap_report - Report trapped packet to drop monitor.
9836 * @devlink: devlink.
9837 * @skb: Trapped packet.
9838 * @trap_ctx: Trap context.
9839 * @in_devlink_port: Input devlink port.
5a2e106c 9840 * @fa_cookie: Flow action cookie. Could be NULL.
0f420b6c
IS		 9841 */
9842void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
5a2e106c
JP		 9843 void *trap_ctx, struct devlink_port *in_devlink_port,
9844 const struct flow_action_cookie *fa_cookie)
9845
0f420b6c
IS		 9846{
9847 struct devlink_trap_item *trap_item = trap_ctx;
0f420b6c
IS		 9848
9849 devlink_trap_stats_update(trap_item->stats, skb->len);
9850 devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
9851
5b88823b
IS		 9852 if (trace_devlink_trap_report_enabled()) {
9853 struct devlink_trap_metadata metadata = {};
9854
9855 devlink_trap_report_metadata_set(&metadata, trap_item,
9856 in_devlink_port, fa_cookie);
9857 trace_devlink_trap_report(devlink, skb, &metadata);
9858 }
0f420b6c
IS		 9859}
9860EXPORT_SYMBOL_GPL(devlink_trap_report);
9861
9862/**
9863 * devlink_trap_ctx_priv - Trap context to driver private information.
9864 * @trap_ctx: Trap context.
9865 *
9866 * Return: Driver private information passed during registration.
9867 */
9868void *devlink_trap_ctx_priv(void *trap_ctx)
9869{
9870 struct devlink_trap_item *trap_item = trap_ctx;
9871
9872 return trap_item->priv;
9873}
9874EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
9875
f9f54392
IS		 9876static int
9877devlink_trap_group_item_policer_link(struct devlink *devlink,
9878 struct devlink_trap_group_item *group_item)
9879{
9880 u32 policer_id = group_item->group->init_policer_id;
9881 struct devlink_trap_policer_item *policer_item;
9882
9883 if (policer_id == 0)
9884 return 0;
9885
9886 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
9887 if (WARN_ON_ONCE(!policer_item))
9888 return -EINVAL;
9889
9890 group_item->policer_item = policer_item;
9891
9892 return 0;
9893}
9894
95ad9555
IS		 9895static int
9896devlink_trap_group_register(struct devlink *devlink,
9897 const struct devlink_trap_group *group)
9898{
9899 struct devlink_trap_group_item *group_item;
9900 int err;
9901
9902 if (devlink_trap_group_item_lookup(devlink, group->name))
9903 return -EEXIST;
9904
9905 group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
9906 if (!group_item)
9907 return -ENOMEM;
9908
9909 group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
9910 if (!group_item->stats) {
9911 err = -ENOMEM;
9912 goto err_stats_alloc;
9913 }
9914
9915 group_item->group = group;
95ad9555 9916
f9f54392
IS		 9917 err = devlink_trap_group_item_policer_link(devlink, group_item);
9918 if (err)
9919 goto err_policer_link;
9920
95ad9555
IS		 9921 if (devlink->ops->trap_group_init) {
9922 err = devlink->ops->trap_group_init(devlink, group);
9923 if (err)
9924 goto err_group_init;
9925 }
9926
9927 list_add_tail(&group_item->list, &devlink->trap_group_list);
9928 devlink_trap_group_notify(devlink, group_item,
9929 DEVLINK_CMD_TRAP_GROUP_NEW);
9930
9931 return 0;
9932
9933err_group_init:
f9f54392 9934err_policer_link:
95ad9555
IS		 9935 free_percpu(group_item->stats);
9936err_stats_alloc:
9937 kfree(group_item);
9938 return err;
9939}
9940
9941static void
9942devlink_trap_group_unregister(struct devlink *devlink,
9943 const struct devlink_trap_group *group)
9944{
9945 struct devlink_trap_group_item *group_item;
9946
9947 group_item = devlink_trap_group_item_lookup(devlink, group->name);
9948 if (WARN_ON_ONCE(!group_item))
9949 return;
9950
9951 devlink_trap_group_notify(devlink, group_item,
9952 DEVLINK_CMD_TRAP_GROUP_DEL);
9953 list_del(&group_item->list);
9954 free_percpu(group_item->stats);
9955 kfree(group_item);
9956}
9957
9958/**
9959 * devlink_trap_groups_register - Register packet trap groups with devlink.
9960 * @devlink: devlink.
9961 * @groups: Packet trap groups.
9962 * @groups_count: Count of provided packet trap groups.
9963 *
9964 * Return: Non-zero value on failure.
9965 */
9966int devlink_trap_groups_register(struct devlink *devlink,
9967 const struct devlink_trap_group *groups,
9968 size_t groups_count)
9969{
9970 int i, err;
9971
9972 mutex_lock(&devlink->lock);
9973 for (i = 0; i < groups_count; i++) {
9974 const struct devlink_trap_group *group = &groups[i];
9975
9976 err = devlink_trap_group_verify(group);
9977 if (err)
9978 goto err_trap_group_verify;
9979
9980 err = devlink_trap_group_register(devlink, group);
9981 if (err)
9982 goto err_trap_group_register;
9983 }
9984 mutex_unlock(&devlink->lock);
9985
9986 return 0;
9987
9988err_trap_group_register:
9989err_trap_group_verify:
9990 for (i--; i >= 0; i--)
9991 devlink_trap_group_unregister(devlink, &groups[i]);
9992 mutex_unlock(&devlink->lock);
9993 return err;
9994}
9995EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
9996
9997/**
9998 * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
9999 * @devlink: devlink.
10000 * @groups: Packet trap groups.
10001 * @groups_count: Count of provided packet trap groups.
10002 */
10003void devlink_trap_groups_unregister(struct devlink *devlink,
10004 const struct devlink_trap_group *groups,
10005 size_t groups_count)
10006{
10007 int i;
10008
10009 mutex_lock(&devlink->lock);
10010 for (i = groups_count - 1; i >= 0; i--)
10011 devlink_trap_group_unregister(devlink, &groups[i]);
10012 mutex_unlock(&devlink->lock);
10013}
10014EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
10015
1e8c6619
IS		 10016static void
10017devlink_trap_policer_notify(struct devlink *devlink,
10018 const struct devlink_trap_policer_item *policer_item,
10019 enum devlink_command cmd)
10020{
10021 struct sk_buff *msg;
10022 int err;
10023
10024 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
10025 cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
10026
10027 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10028 if (!msg)
10029 return;
10030
10031 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
10032 0, 0);
10033 if (err) {
10034 nlmsg_free(msg);
10035 return;
10036 }
10037
10038 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
10039 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
10040}
10041
10042static int
10043devlink_trap_policer_register(struct devlink *devlink,
10044 const struct devlink_trap_policer *policer)
10045{
10046 struct devlink_trap_policer_item *policer_item;
10047 int err;
10048
10049 if (devlink_trap_policer_item_lookup(devlink, policer->id))
10050 return -EEXIST;
10051
10052 policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
10053 if (!policer_item)
10054 return -ENOMEM;
10055
10056 policer_item->policer = policer;
10057 policer_item->rate = policer->init_rate;
10058 policer_item->burst = policer->init_burst;
10059
10060 if (devlink->ops->trap_policer_init) {
10061 err = devlink->ops->trap_policer_init(devlink, policer);
10062 if (err)
10063 goto err_policer_init;
10064 }
10065
10066 list_add_tail(&policer_item->list, &devlink->trap_policer_list);
10067 devlink_trap_policer_notify(devlink, policer_item,
10068 DEVLINK_CMD_TRAP_POLICER_NEW);
10069
10070 return 0;
10071
10072err_policer_init:
10073 kfree(policer_item);
10074 return err;
10075}
10076
10077static void
10078devlink_trap_policer_unregister(struct devlink *devlink,
10079 const struct devlink_trap_policer *policer)
10080{
10081 struct devlink_trap_policer_item *policer_item;
10082
10083 policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
10084 if (WARN_ON_ONCE(!policer_item))
10085 return;
10086
10087 devlink_trap_policer_notify(devlink, policer_item,
10088 DEVLINK_CMD_TRAP_POLICER_DEL);
10089 list_del(&policer_item->list);
10090 if (devlink->ops->trap_policer_fini)
10091 devlink->ops->trap_policer_fini(devlink, policer);
10092 kfree(policer_item);
10093}
10094
10095/**
10096 * devlink_trap_policers_register - Register packet trap policers with devlink.
10097 * @devlink: devlink.
10098 * @policers: Packet trap policers.
10099 * @policers_count: Count of provided packet trap policers.
10100 *
10101 * Return: Non-zero value on failure.
10102 */
10103int
10104devlink_trap_policers_register(struct devlink *devlink,
10105 const struct devlink_trap_policer *policers,
10106 size_t policers_count)
10107{
10108 int i, err;
10109
10110 mutex_lock(&devlink->lock);
10111 for (i = 0; i < policers_count; i++) {
10112 const struct devlink_trap_policer *policer = &policers[i];
10113
10114 if (WARN_ON(policer->id == 0 ||
10115 policer->max_rate < policer->min_rate ||
10116 policer->max_burst < policer->min_burst)) {
10117 err = -EINVAL;
10118 goto err_trap_policer_verify;
10119 }
10120
10121 err = devlink_trap_policer_register(devlink, policer);
10122 if (err)
10123 goto err_trap_policer_register;
10124 }
10125 mutex_unlock(&devlink->lock);
10126
10127 return 0;
10128
10129err_trap_policer_register:
10130err_trap_policer_verify:
10131 for (i--; i >= 0; i--)
10132 devlink_trap_policer_unregister(devlink, &policers[i]);
10133 mutex_unlock(&devlink->lock);
10134 return err;
10135}
10136EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
10137
10138/**
10139 * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
10140 * @devlink: devlink.
10141 * @policers: Packet trap policers.
10142 * @policers_count: Count of provided packet trap policers.
10143 */
10144void
10145devlink_trap_policers_unregister(struct devlink *devlink,
10146 const struct devlink_trap_policer *policers,
10147 size_t policers_count)
10148{
10149 int i;
10150
10151 mutex_lock(&devlink->lock);
10152 for (i = policers_count - 1; i >= 0; i--)
10153 devlink_trap_policer_unregister(devlink, &policers[i]);
10154 mutex_unlock(&devlink->lock);
10155}
10156EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
10157
ddb6e99e
JK		 10158static void __devlink_compat_running_version(struct devlink *devlink,
10159 char *buf, size_t len)
10160{
10161 const struct nlattr *nlattr;
10162 struct devlink_info_req req;
10163 struct sk_buff *msg;
10164 int rem, err;
10165
ddb6e99e
JK		 10166 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10167 if (!msg)
10168 return;
10169
10170 req.msg = msg;
10171 err = devlink->ops->info_get(devlink, &req, NULL);
10172 if (err)
10173 goto free_msg;
10174
10175 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
10176 const struct nlattr *kv;
10177 int rem_kv;
10178
10179 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
10180 continue;
10181
10182 nla_for_each_nested(kv, nlattr, rem_kv) {
10183 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
10184 continue;
10185
10186 strlcat(buf, nla_data(kv), len);
10187 strlcat(buf, " ", len);
10188 }
10189 }
10190free_msg:
10191 nlmsg_free(msg);
10192}
10193
10194void devlink_compat_running_version(struct net_device *dev,
10195 char *buf, size_t len)
10196{
ddb6e99e
JK		 10197 struct devlink *devlink;
10198
1b45ff6c
JK		 10199 dev_hold(dev);
10200 rtnl_unlock();
10201
b473b0d2 10202 devlink = netdev_to_devlink(dev);
be6fe1d8 10203 if (!devlink || !devlink->ops->info_get)
e0dcd386 10204 goto out;
b473b0d2
JK		 10205
10206 mutex_lock(&devlink->lock);
10207 __devlink_compat_running_version(devlink, buf, len);
10208 mutex_unlock(&devlink->lock);
1b45ff6c 10209
e0dcd386 10210out:
1b45ff6c
JK		 10211 rtnl_lock();
10212 dev_put(dev);
ddb6e99e
JK		 10213}
10214
4eceba17
JK		 10215int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
10216{
bc75c054 10217 struct devlink_flash_update_params params = {};
4eceba17 10218 struct devlink *devlink;
e0dcd386 10219 int ret;
4eceba17 10220
1b45ff6c
JK		 10221 dev_hold(dev);
10222 rtnl_unlock();
10223
b473b0d2 10224 devlink = netdev_to_devlink(dev);
e0dcd386
JP		 10225 if (!devlink || !devlink->ops->flash_update) {
10226 ret = -EOPNOTSUPP;
10227 goto out;
10228 }
4eceba17 10229
bc75c054
JK		 10230 params.file_name = file_name;
10231
b473b0d2 10232 mutex_lock(&devlink->lock);
bc75c054 10233 ret = devlink->ops->flash_update(devlink, &params, NULL);
b473b0d2 10234 mutex_unlock(&devlink->lock);
1b45ff6c 10235
e0dcd386 10236out:
1b45ff6c
JK		 10237 rtnl_lock();
10238 dev_put(dev);
10239
b473b0d2 10240 return ret;
4eceba17
JK		 10241}
10242
af3836df
JP		 10243int devlink_compat_phys_port_name_get(struct net_device *dev,
10244 char *name, size_t len)
10245{
10246 struct devlink_port *devlink_port;
10247
10248 /* RTNL mutex is held here which ensures that devlink_port
10249 * instance cannot disappear in the middle. No need to take
10250 * any devlink lock as only permanent values are accessed.
10251 */
10252 ASSERT_RTNL();
10253
10254 devlink_port = netdev_to_devlink_port(dev);
10255 if (!devlink_port)
10256 return -EOPNOTSUPP;
10257
10258 return __devlink_port_phys_port_name_get(devlink_port, name, len);
10259}
10260
7e1146e8
JP		 10261int devlink_compat_switch_id_get(struct net_device *dev,
10262 struct netdev_phys_item_id *ppid)
10263{
10264 struct devlink_port *devlink_port;
10265
043b8413
VB		 10266 /* Caller must hold RTNL mutex or reference to dev, which ensures that
10267 * devlink_port instance cannot disappear in the middle. No need to take
7e1146e8
JP		 10268 * any devlink lock as only permanent values are accessed.
10269 */
7e1146e8 10270 devlink_port = netdev_to_devlink_port(dev);
46737a19 10271 if (!devlink_port || !devlink_port->switch_port)
7e1146e8
JP		 10272 return -EOPNOTSUPP;
10273
10274 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
10275
10276 return 0;
10277}
10278
070c63f2
JP		 10279static void __net_exit devlink_pernet_pre_exit(struct net *net)
10280{
10281 struct devlink *devlink;
ccdf0721 10282 u32 actions_performed;
070c63f2
JP		 10283 int err;
10284
10285 /* In case network namespace is getting destroyed, reload
10286 * all devlink instances from this namespace into init_net.
10287 */
10288 mutex_lock(&devlink_mutex);
10289 list_for_each_entry(devlink, &devlink_list, list) {
10290 if (net_eq(devlink_net(devlink), net)) {
69d56e0e 10291 if (WARN_ON(!devlink_reload_supported(devlink->ops)))
070c63f2 10292 continue;
ccdf0721
MS		 10293 err = devlink_reload(devlink, &init_net,
10294 DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
dc64cc7c 10295 DEVLINK_RELOAD_LIMIT_UNSPEC,
ccdf0721 10296 &actions_performed, NULL);
a0c76345 10297 if (err && err != -EOPNOTSUPP)
070c63f2
JP		 10298 pr_warn("Failed to reload devlink instance into init_net\n");
10299 }
10300 }
10301 mutex_unlock(&devlink_mutex);
10302}
10303
10304static struct pernet_operations devlink_pernet_ops __net_initdata = {
10305 .pre_exit = devlink_pernet_pre_exit,
10306};
10307
f4b6bcc7 10308static int __init devlink_init(void)
bfcd3a46 10309{
070c63f2
JP		 10310 int err;
10311
10312 err = genl_register_family(&devlink_nl_family);
10313 if (err)
10314 goto out;
10315 err = register_pernet_subsys(&devlink_pernet_ops);
10316
10317out:
10318 WARN_ON(err);
10319 return err;
bfcd3a46
JP		 10320}
10321
f4b6bcc7 10322subsys_initcall(devlink_init);
Linux 6.x block layer and io_uring tree(s)