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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / net / core / devlink.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
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>
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>
18 #include <linux/spinlock.h>
19 #include <linux/refcount.h>
20 #include <linux/workqueue.h>
21 #include <linux/u64_stats_sync.h>
22 #include <linux/timekeeping.h>
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>
30 #include <net/drop_monitor.h>
31 #define CREATE_TRACE_POINTS
32 #include <trace/events/devlink.h>
33
34 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
35 {
36 .name = "destination mac",
37 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
38 .bitwidth = 48,
39 },
40 };
41
42 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
43 .name = "ethernet",
44 .id = DEVLINK_DPIPE_HEADER_ETHERNET,
45 .fields = devlink_dpipe_fields_ethernet,
46 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
47 .global = true,
48 };
49 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
50
51 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
52 {
53 .name = "destination ip",
54 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
55 .bitwidth = 32,
56 },
57 };
58
59 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
60 .name = "ipv4",
61 .id = DEVLINK_DPIPE_HEADER_IPV4,
62 .fields = devlink_dpipe_fields_ipv4,
63 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
64 .global = true,
65 };
66 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
67
68 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
69 {
70 .name = "destination ip",
71 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
72 .bitwidth = 128,
73 },
74 };
75
76 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
77 .name = "ipv6",
78 .id = DEVLINK_DPIPE_HEADER_IPV6,
79 .fields = devlink_dpipe_fields_ipv6,
80 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
81 .global = true,
82 };
83 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
84
85 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
86 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
87
88 static LIST_HEAD(devlink_list);
89
90 /* devlink_mutex
91 *
92 * An overall lock guarding every operation coming from userspace.
93 * It also guards devlink devices list and it is taken when
94 * driver registers/unregisters it.
95 */
96 static DEFINE_MUTEX(devlink_mutex);
97
98 struct net *devlink_net(const struct devlink *devlink)
99 {
100 return read_pnet(&devlink->_net);
101 }
102 EXPORT_SYMBOL_GPL(devlink_net);
103
104 static void __devlink_net_set(struct devlink *devlink, struct net *net)
105 {
106 write_pnet(&devlink->_net, net);
107 }
108
109 void devlink_net_set(struct devlink *devlink, struct net *net)
110 {
111 if (WARN_ON(devlink->registered))
112 return;
113 __devlink_net_set(devlink, net);
114 }
115 EXPORT_SYMBOL_GPL(devlink_net_set);
116
117 static struct devlink *devlink_get_from_attrs(struct net *net,
118 struct nlattr **attrs)
119 {
120 struct devlink *devlink;
121 char *busname;
122 char *devname;
123
124 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
125 return ERR_PTR(-EINVAL);
126
127 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
128 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
129
130 lockdep_assert_held(&devlink_mutex);
131
132 list_for_each_entry(devlink, &devlink_list, list) {
133 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
134 strcmp(dev_name(devlink->dev), devname) == 0 &&
135 net_eq(devlink_net(devlink), net))
136 return devlink;
137 }
138
139 return ERR_PTR(-ENODEV);
140 }
141
142 static struct devlink *devlink_get_from_info(struct genl_info *info)
143 {
144 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
145 }
146
147 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
148 unsigned int port_index)
149 {
150 struct devlink_port *devlink_port;
151
152 list_for_each_entry(devlink_port, &devlink->port_list, list) {
153 if (devlink_port->index == port_index)
154 return devlink_port;
155 }
156 return NULL;
157 }
158
159 static bool devlink_port_index_exists(struct devlink *devlink,
160 unsigned int port_index)
161 {
162 return devlink_port_get_by_index(devlink, port_index);
163 }
164
165 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
166 struct nlattr **attrs)
167 {
168 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
169 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
170 struct devlink_port *devlink_port;
171
172 devlink_port = devlink_port_get_by_index(devlink, port_index);
173 if (!devlink_port)
174 return ERR_PTR(-ENODEV);
175 return devlink_port;
176 }
177 return ERR_PTR(-EINVAL);
178 }
179
180 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
181 struct genl_info *info)
182 {
183 return devlink_port_get_from_attrs(devlink, info->attrs);
184 }
185
186 struct devlink_sb {
187 struct list_head list;
188 unsigned int index;
189 u32 size;
190 u16 ingress_pools_count;
191 u16 egress_pools_count;
192 u16 ingress_tc_count;
193 u16 egress_tc_count;
194 };
195
196 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
197 {
198 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
199 }
200
201 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
202 unsigned int sb_index)
203 {
204 struct devlink_sb *devlink_sb;
205
206 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
207 if (devlink_sb->index == sb_index)
208 return devlink_sb;
209 }
210 return NULL;
211 }
212
213 static bool devlink_sb_index_exists(struct devlink *devlink,
214 unsigned int sb_index)
215 {
216 return devlink_sb_get_by_index(devlink, sb_index);
217 }
218
219 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
220 struct nlattr **attrs)
221 {
222 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
223 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
224 struct devlink_sb *devlink_sb;
225
226 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
227 if (!devlink_sb)
228 return ERR_PTR(-ENODEV);
229 return devlink_sb;
230 }
231 return ERR_PTR(-EINVAL);
232 }
233
234 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
235 struct genl_info *info)
236 {
237 return devlink_sb_get_from_attrs(devlink, info->attrs);
238 }
239
240 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
241 struct nlattr **attrs,
242 u16 *p_pool_index)
243 {
244 u16 val;
245
246 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
247 return -EINVAL;
248
249 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
250 if (val >= devlink_sb_pool_count(devlink_sb))
251 return -EINVAL;
252 *p_pool_index = val;
253 return 0;
254 }
255
256 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
257 struct genl_info *info,
258 u16 *p_pool_index)
259 {
260 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
261 p_pool_index);
262 }
263
264 static int
265 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
266 enum devlink_sb_pool_type *p_pool_type)
267 {
268 u8 val;
269
270 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
271 return -EINVAL;
272
273 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
274 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
275 val != DEVLINK_SB_POOL_TYPE_EGRESS)
276 return -EINVAL;
277 *p_pool_type = val;
278 return 0;
279 }
280
281 static int
282 devlink_sb_pool_type_get_from_info(struct genl_info *info,
283 enum devlink_sb_pool_type *p_pool_type)
284 {
285 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
286 }
287
288 static int
289 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
290 enum devlink_sb_threshold_type *p_th_type)
291 {
292 u8 val;
293
294 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
295 return -EINVAL;
296
297 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
298 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
299 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
300 return -EINVAL;
301 *p_th_type = val;
302 return 0;
303 }
304
305 static int
306 devlink_sb_th_type_get_from_info(struct genl_info *info,
307 enum devlink_sb_threshold_type *p_th_type)
308 {
309 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
310 }
311
312 static int
313 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
314 struct nlattr **attrs,
315 enum devlink_sb_pool_type pool_type,
316 u16 *p_tc_index)
317 {
318 u16 val;
319
320 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
321 return -EINVAL;
322
323 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
324 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
325 val >= devlink_sb->ingress_tc_count)
326 return -EINVAL;
327 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
328 val >= devlink_sb->egress_tc_count)
329 return -EINVAL;
330 *p_tc_index = val;
331 return 0;
332 }
333
334 static int
335 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
336 struct genl_info *info,
337 enum devlink_sb_pool_type pool_type,
338 u16 *p_tc_index)
339 {
340 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
341 pool_type, p_tc_index);
342 }
343
344 struct devlink_region {
345 struct devlink *devlink;
346 struct list_head list;
347 const struct devlink_region_ops *ops;
348 struct list_head snapshot_list;
349 u32 max_snapshots;
350 u32 cur_snapshots;
351 u64 size;
352 };
353
354 struct devlink_snapshot {
355 struct list_head list;
356 struct devlink_region *region;
357 u8 *data;
358 u32 id;
359 };
360
361 static struct devlink_region *
362 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
363 {
364 struct devlink_region *region;
365
366 list_for_each_entry(region, &devlink->region_list, list)
367 if (!strcmp(region->ops->name, region_name))
368 return region;
369
370 return NULL;
371 }
372
373 static struct devlink_snapshot *
374 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
375 {
376 struct devlink_snapshot *snapshot;
377
378 list_for_each_entry(snapshot, &region->snapshot_list, list)
379 if (snapshot->id == id)
380 return snapshot;
381
382 return NULL;
383 }
384
385 #define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
386 #define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
387 #define DEVLINK_NL_FLAG_NEED_SB BIT(2)
388
389 /* The per devlink instance lock is taken by default in the pre-doit
390 * operation, yet several commands do not require this. The global
391 * devlink lock is taken and protects from disruption by user-calls.
392 */
393 #define DEVLINK_NL_FLAG_NO_LOCK BIT(3)
394
395 static int devlink_nl_pre_doit(const struct genl_ops *ops,
396 struct sk_buff *skb, struct genl_info *info)
397 {
398 struct devlink *devlink;
399 int err;
400
401 mutex_lock(&devlink_mutex);
402 devlink = devlink_get_from_info(info);
403 if (IS_ERR(devlink)) {
404 mutex_unlock(&devlink_mutex);
405 return PTR_ERR(devlink);
406 }
407 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
408 mutex_lock(&devlink->lock);
409 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
410 info->user_ptr[0] = devlink;
411 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
412 struct devlink_port *devlink_port;
413
414 devlink_port = devlink_port_get_from_info(devlink, info);
415 if (IS_ERR(devlink_port)) {
416 err = PTR_ERR(devlink_port);
417 goto unlock;
418 }
419 info->user_ptr[0] = devlink_port;
420 }
421 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
422 struct devlink_sb *devlink_sb;
423
424 devlink_sb = devlink_sb_get_from_info(devlink, info);
425 if (IS_ERR(devlink_sb)) {
426 err = PTR_ERR(devlink_sb);
427 goto unlock;
428 }
429 info->user_ptr[1] = devlink_sb;
430 }
431 return 0;
432
433 unlock:
434 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
435 mutex_unlock(&devlink->lock);
436 mutex_unlock(&devlink_mutex);
437 return err;
438 }
439
440 static void devlink_nl_post_doit(const struct genl_ops *ops,
441 struct sk_buff *skb, struct genl_info *info)
442 {
443 struct devlink *devlink;
444
445 /* When devlink changes netns, it would not be found
446 * by devlink_get_from_info(). So try if it is stored first.
447 */
448 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
449 devlink = info->user_ptr[0];
450 } else {
451 devlink = devlink_get_from_info(info);
452 WARN_ON(IS_ERR(devlink));
453 }
454 if (!IS_ERR(devlink) && ~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
455 mutex_unlock(&devlink->lock);
456 mutex_unlock(&devlink_mutex);
457 }
458
459 static struct genl_family devlink_nl_family;
460
461 enum devlink_multicast_groups {
462 DEVLINK_MCGRP_CONFIG,
463 };
464
465 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
466 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
467 };
468
469 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
470 {
471 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
472 return -EMSGSIZE;
473 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
474 return -EMSGSIZE;
475 return 0;
476 }
477
478 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
479 enum devlink_command cmd, u32 portid,
480 u32 seq, int flags)
481 {
482 void *hdr;
483
484 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
485 if (!hdr)
486 return -EMSGSIZE;
487
488 if (devlink_nl_put_handle(msg, devlink))
489 goto nla_put_failure;
490 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
491 goto nla_put_failure;
492
493 genlmsg_end(msg, hdr);
494 return 0;
495
496 nla_put_failure:
497 genlmsg_cancel(msg, hdr);
498 return -EMSGSIZE;
499 }
500
501 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
502 {
503 struct sk_buff *msg;
504 int err;
505
506 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
507
508 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
509 if (!msg)
510 return;
511
512 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
513 if (err) {
514 nlmsg_free(msg);
515 return;
516 }
517
518 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
519 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
520 }
521
522 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
523 struct devlink_port *devlink_port)
524 {
525 struct devlink_port_attrs *attrs = &devlink_port->attrs;
526
527 if (!attrs->set)
528 return 0;
529 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
530 return -EMSGSIZE;
531 switch (devlink_port->attrs.flavour) {
532 case DEVLINK_PORT_FLAVOUR_PCI_PF:
533 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
534 attrs->pci_pf.pf))
535 return -EMSGSIZE;
536 break;
537 case DEVLINK_PORT_FLAVOUR_PCI_VF:
538 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
539 attrs->pci_vf.pf) ||
540 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
541 attrs->pci_vf.vf))
542 return -EMSGSIZE;
543 break;
544 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
545 case DEVLINK_PORT_FLAVOUR_CPU:
546 case DEVLINK_PORT_FLAVOUR_DSA:
547 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
548 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
549 attrs->phys.port_number))
550 return -EMSGSIZE;
551 if (!attrs->split)
552 return 0;
553 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
554 attrs->phys.port_number))
555 return -EMSGSIZE;
556 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
557 attrs->phys.split_subport_number))
558 return -EMSGSIZE;
559 break;
560 default:
561 break;
562 }
563 return 0;
564 }
565
566 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
567 struct devlink_port *devlink_port,
568 enum devlink_command cmd, u32 portid,
569 u32 seq, int flags)
570 {
571 void *hdr;
572
573 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
574 if (!hdr)
575 return -EMSGSIZE;
576
577 if (devlink_nl_put_handle(msg, devlink))
578 goto nla_put_failure;
579 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
580 goto nla_put_failure;
581
582 spin_lock_bh(&devlink_port->type_lock);
583 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
584 goto nla_put_failure_type_locked;
585 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
586 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
587 devlink_port->desired_type))
588 goto nla_put_failure_type_locked;
589 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
590 struct net_device *netdev = devlink_port->type_dev;
591
592 if (netdev &&
593 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
594 netdev->ifindex) ||
595 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
596 netdev->name)))
597 goto nla_put_failure_type_locked;
598 }
599 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
600 struct ib_device *ibdev = devlink_port->type_dev;
601
602 if (ibdev &&
603 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
604 ibdev->name))
605 goto nla_put_failure_type_locked;
606 }
607 spin_unlock_bh(&devlink_port->type_lock);
608 if (devlink_nl_port_attrs_put(msg, devlink_port))
609 goto nla_put_failure;
610
611 genlmsg_end(msg, hdr);
612 return 0;
613
614 nla_put_failure_type_locked:
615 spin_unlock_bh(&devlink_port->type_lock);
616 nla_put_failure:
617 genlmsg_cancel(msg, hdr);
618 return -EMSGSIZE;
619 }
620
621 static void devlink_port_notify(struct devlink_port *devlink_port,
622 enum devlink_command cmd)
623 {
624 struct devlink *devlink = devlink_port->devlink;
625 struct sk_buff *msg;
626 int err;
627
628 if (!devlink_port->registered)
629 return;
630
631 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
632
633 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
634 if (!msg)
635 return;
636
637 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
638 if (err) {
639 nlmsg_free(msg);
640 return;
641 }
642
643 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
644 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
645 }
646
647 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
648 {
649 struct devlink *devlink = info->user_ptr[0];
650 struct sk_buff *msg;
651 int err;
652
653 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
654 if (!msg)
655 return -ENOMEM;
656
657 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
658 info->snd_portid, info->snd_seq, 0);
659 if (err) {
660 nlmsg_free(msg);
661 return err;
662 }
663
664 return genlmsg_reply(msg, info);
665 }
666
667 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
668 struct netlink_callback *cb)
669 {
670 struct devlink *devlink;
671 int start = cb->args[0];
672 int idx = 0;
673 int err;
674
675 mutex_lock(&devlink_mutex);
676 list_for_each_entry(devlink, &devlink_list, list) {
677 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
678 continue;
679 if (idx < start) {
680 idx++;
681 continue;
682 }
683 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
684 NETLINK_CB(cb->skb).portid,
685 cb->nlh->nlmsg_seq, NLM_F_MULTI);
686 if (err)
687 goto out;
688 idx++;
689 }
690 out:
691 mutex_unlock(&devlink_mutex);
692
693 cb->args[0] = idx;
694 return msg->len;
695 }
696
697 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
698 struct genl_info *info)
699 {
700 struct devlink_port *devlink_port = info->user_ptr[0];
701 struct devlink *devlink = devlink_port->devlink;
702 struct sk_buff *msg;
703 int err;
704
705 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
706 if (!msg)
707 return -ENOMEM;
708
709 err = devlink_nl_port_fill(msg, devlink, devlink_port,
710 DEVLINK_CMD_PORT_NEW,
711 info->snd_portid, info->snd_seq, 0);
712 if (err) {
713 nlmsg_free(msg);
714 return err;
715 }
716
717 return genlmsg_reply(msg, info);
718 }
719
720 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
721 struct netlink_callback *cb)
722 {
723 struct devlink *devlink;
724 struct devlink_port *devlink_port;
725 int start = cb->args[0];
726 int idx = 0;
727 int err;
728
729 mutex_lock(&devlink_mutex);
730 list_for_each_entry(devlink, &devlink_list, list) {
731 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
732 continue;
733 mutex_lock(&devlink->lock);
734 list_for_each_entry(devlink_port, &devlink->port_list, list) {
735 if (idx < start) {
736 idx++;
737 continue;
738 }
739 err = devlink_nl_port_fill(msg, devlink, devlink_port,
740 DEVLINK_CMD_NEW,
741 NETLINK_CB(cb->skb).portid,
742 cb->nlh->nlmsg_seq,
743 NLM_F_MULTI);
744 if (err) {
745 mutex_unlock(&devlink->lock);
746 goto out;
747 }
748 idx++;
749 }
750 mutex_unlock(&devlink->lock);
751 }
752 out:
753 mutex_unlock(&devlink_mutex);
754
755 cb->args[0] = idx;
756 return msg->len;
757 }
758
759 static int devlink_port_type_set(struct devlink *devlink,
760 struct devlink_port *devlink_port,
761 enum devlink_port_type port_type)
762
763 {
764 int err;
765
766 if (devlink->ops->port_type_set) {
767 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
768 return -EINVAL;
769 if (port_type == devlink_port->type)
770 return 0;
771 err = devlink->ops->port_type_set(devlink_port, port_type);
772 if (err)
773 return err;
774 devlink_port->desired_type = port_type;
775 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
776 return 0;
777 }
778 return -EOPNOTSUPP;
779 }
780
781 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
782 struct genl_info *info)
783 {
784 struct devlink_port *devlink_port = info->user_ptr[0];
785 struct devlink *devlink = devlink_port->devlink;
786 int err;
787
788 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
789 enum devlink_port_type port_type;
790
791 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
792 err = devlink_port_type_set(devlink, devlink_port, port_type);
793 if (err)
794 return err;
795 }
796 return 0;
797 }
798
799 static int devlink_port_split(struct devlink *devlink, u32 port_index,
800 u32 count, struct netlink_ext_ack *extack)
801
802 {
803 if (devlink->ops->port_split)
804 return devlink->ops->port_split(devlink, port_index, count,
805 extack);
806 return -EOPNOTSUPP;
807 }
808
809 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
810 struct genl_info *info)
811 {
812 struct devlink *devlink = info->user_ptr[0];
813 u32 port_index;
814 u32 count;
815
816 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
817 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
818 return -EINVAL;
819
820 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
821 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
822 return devlink_port_split(devlink, port_index, count, info->extack);
823 }
824
825 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
826 struct netlink_ext_ack *extack)
827
828 {
829 if (devlink->ops->port_unsplit)
830 return devlink->ops->port_unsplit(devlink, port_index, extack);
831 return -EOPNOTSUPP;
832 }
833
834 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
835 struct genl_info *info)
836 {
837 struct devlink *devlink = info->user_ptr[0];
838 u32 port_index;
839
840 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
841 return -EINVAL;
842
843 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
844 return devlink_port_unsplit(devlink, port_index, info->extack);
845 }
846
847 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
848 struct devlink_sb *devlink_sb,
849 enum devlink_command cmd, u32 portid,
850 u32 seq, int flags)
851 {
852 void *hdr;
853
854 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
855 if (!hdr)
856 return -EMSGSIZE;
857
858 if (devlink_nl_put_handle(msg, devlink))
859 goto nla_put_failure;
860 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
861 goto nla_put_failure;
862 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
863 goto nla_put_failure;
864 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
865 devlink_sb->ingress_pools_count))
866 goto nla_put_failure;
867 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
868 devlink_sb->egress_pools_count))
869 goto nla_put_failure;
870 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
871 devlink_sb->ingress_tc_count))
872 goto nla_put_failure;
873 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
874 devlink_sb->egress_tc_count))
875 goto nla_put_failure;
876
877 genlmsg_end(msg, hdr);
878 return 0;
879
880 nla_put_failure:
881 genlmsg_cancel(msg, hdr);
882 return -EMSGSIZE;
883 }
884
885 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
886 struct genl_info *info)
887 {
888 struct devlink *devlink = info->user_ptr[0];
889 struct devlink_sb *devlink_sb = info->user_ptr[1];
890 struct sk_buff *msg;
891 int err;
892
893 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
894 if (!msg)
895 return -ENOMEM;
896
897 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
898 DEVLINK_CMD_SB_NEW,
899 info->snd_portid, info->snd_seq, 0);
900 if (err) {
901 nlmsg_free(msg);
902 return err;
903 }
904
905 return genlmsg_reply(msg, info);
906 }
907
908 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
909 struct netlink_callback *cb)
910 {
911 struct devlink *devlink;
912 struct devlink_sb *devlink_sb;
913 int start = cb->args[0];
914 int idx = 0;
915 int err;
916
917 mutex_lock(&devlink_mutex);
918 list_for_each_entry(devlink, &devlink_list, list) {
919 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
920 continue;
921 mutex_lock(&devlink->lock);
922 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
923 if (idx < start) {
924 idx++;
925 continue;
926 }
927 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
928 DEVLINK_CMD_SB_NEW,
929 NETLINK_CB(cb->skb).portid,
930 cb->nlh->nlmsg_seq,
931 NLM_F_MULTI);
932 if (err) {
933 mutex_unlock(&devlink->lock);
934 goto out;
935 }
936 idx++;
937 }
938 mutex_unlock(&devlink->lock);
939 }
940 out:
941 mutex_unlock(&devlink_mutex);
942
943 cb->args[0] = idx;
944 return msg->len;
945 }
946
947 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
948 struct devlink_sb *devlink_sb,
949 u16 pool_index, enum devlink_command cmd,
950 u32 portid, u32 seq, int flags)
951 {
952 struct devlink_sb_pool_info pool_info;
953 void *hdr;
954 int err;
955
956 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
957 pool_index, &pool_info);
958 if (err)
959 return err;
960
961 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
962 if (!hdr)
963 return -EMSGSIZE;
964
965 if (devlink_nl_put_handle(msg, devlink))
966 goto nla_put_failure;
967 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
968 goto nla_put_failure;
969 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
970 goto nla_put_failure;
971 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
972 goto nla_put_failure;
973 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
974 goto nla_put_failure;
975 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
976 pool_info.threshold_type))
977 goto nla_put_failure;
978 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
979 pool_info.cell_size))
980 goto nla_put_failure;
981
982 genlmsg_end(msg, hdr);
983 return 0;
984
985 nla_put_failure:
986 genlmsg_cancel(msg, hdr);
987 return -EMSGSIZE;
988 }
989
990 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
991 struct genl_info *info)
992 {
993 struct devlink *devlink = info->user_ptr[0];
994 struct devlink_sb *devlink_sb = info->user_ptr[1];
995 struct sk_buff *msg;
996 u16 pool_index;
997 int err;
998
999 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1000 &pool_index);
1001 if (err)
1002 return err;
1003
1004 if (!devlink->ops->sb_pool_get)
1005 return -EOPNOTSUPP;
1006
1007 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1008 if (!msg)
1009 return -ENOMEM;
1010
1011 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
1012 DEVLINK_CMD_SB_POOL_NEW,
1013 info->snd_portid, info->snd_seq, 0);
1014 if (err) {
1015 nlmsg_free(msg);
1016 return err;
1017 }
1018
1019 return genlmsg_reply(msg, info);
1020 }
1021
1022 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1023 struct devlink *devlink,
1024 struct devlink_sb *devlink_sb,
1025 u32 portid, u32 seq)
1026 {
1027 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1028 u16 pool_index;
1029 int err;
1030
1031 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1032 if (*p_idx < start) {
1033 (*p_idx)++;
1034 continue;
1035 }
1036 err = devlink_nl_sb_pool_fill(msg, devlink,
1037 devlink_sb,
1038 pool_index,
1039 DEVLINK_CMD_SB_POOL_NEW,
1040 portid, seq, NLM_F_MULTI);
1041 if (err)
1042 return err;
1043 (*p_idx)++;
1044 }
1045 return 0;
1046 }
1047
1048 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1049 struct netlink_callback *cb)
1050 {
1051 struct devlink *devlink;
1052 struct devlink_sb *devlink_sb;
1053 int start = cb->args[0];
1054 int idx = 0;
1055 int err = 0;
1056
1057 mutex_lock(&devlink_mutex);
1058 list_for_each_entry(devlink, &devlink_list, list) {
1059 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1060 !devlink->ops->sb_pool_get)
1061 continue;
1062 mutex_lock(&devlink->lock);
1063 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1064 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1065 devlink_sb,
1066 NETLINK_CB(cb->skb).portid,
1067 cb->nlh->nlmsg_seq);
1068 if (err && err != -EOPNOTSUPP) {
1069 mutex_unlock(&devlink->lock);
1070 goto out;
1071 }
1072 }
1073 mutex_unlock(&devlink->lock);
1074 }
1075 out:
1076 mutex_unlock(&devlink_mutex);
1077
1078 if (err != -EMSGSIZE)
1079 return err;
1080
1081 cb->args[0] = idx;
1082 return msg->len;
1083 }
1084
1085 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1086 u16 pool_index, u32 size,
1087 enum devlink_sb_threshold_type threshold_type,
1088 struct netlink_ext_ack *extack)
1089
1090 {
1091 const struct devlink_ops *ops = devlink->ops;
1092
1093 if (ops->sb_pool_set)
1094 return ops->sb_pool_set(devlink, sb_index, pool_index,
1095 size, threshold_type, extack);
1096 return -EOPNOTSUPP;
1097 }
1098
1099 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1100 struct genl_info *info)
1101 {
1102 struct devlink *devlink = info->user_ptr[0];
1103 struct devlink_sb *devlink_sb = info->user_ptr[1];
1104 enum devlink_sb_threshold_type threshold_type;
1105 u16 pool_index;
1106 u32 size;
1107 int err;
1108
1109 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1110 &pool_index);
1111 if (err)
1112 return err;
1113
1114 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1115 if (err)
1116 return err;
1117
1118 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1119 return -EINVAL;
1120
1121 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1122 return devlink_sb_pool_set(devlink, devlink_sb->index,
1123 pool_index, size, threshold_type,
1124 info->extack);
1125 }
1126
1127 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1128 struct devlink *devlink,
1129 struct devlink_port *devlink_port,
1130 struct devlink_sb *devlink_sb,
1131 u16 pool_index,
1132 enum devlink_command cmd,
1133 u32 portid, u32 seq, int flags)
1134 {
1135 const struct devlink_ops *ops = devlink->ops;
1136 u32 threshold;
1137 void *hdr;
1138 int err;
1139
1140 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1141 pool_index, &threshold);
1142 if (err)
1143 return err;
1144
1145 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1146 if (!hdr)
1147 return -EMSGSIZE;
1148
1149 if (devlink_nl_put_handle(msg, devlink))
1150 goto nla_put_failure;
1151 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1152 goto nla_put_failure;
1153 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1154 goto nla_put_failure;
1155 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1156 goto nla_put_failure;
1157 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1158 goto nla_put_failure;
1159
1160 if (ops->sb_occ_port_pool_get) {
1161 u32 cur;
1162 u32 max;
1163
1164 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1165 pool_index, &cur, &max);
1166 if (err && err != -EOPNOTSUPP)
1167 return err;
1168 if (!err) {
1169 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1170 goto nla_put_failure;
1171 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1172 goto nla_put_failure;
1173 }
1174 }
1175
1176 genlmsg_end(msg, hdr);
1177 return 0;
1178
1179 nla_put_failure:
1180 genlmsg_cancel(msg, hdr);
1181 return -EMSGSIZE;
1182 }
1183
1184 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1185 struct genl_info *info)
1186 {
1187 struct devlink_port *devlink_port = info->user_ptr[0];
1188 struct devlink *devlink = devlink_port->devlink;
1189 struct devlink_sb *devlink_sb = info->user_ptr[1];
1190 struct sk_buff *msg;
1191 u16 pool_index;
1192 int err;
1193
1194 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1195 &pool_index);
1196 if (err)
1197 return err;
1198
1199 if (!devlink->ops->sb_port_pool_get)
1200 return -EOPNOTSUPP;
1201
1202 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1203 if (!msg)
1204 return -ENOMEM;
1205
1206 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1207 devlink_sb, pool_index,
1208 DEVLINK_CMD_SB_PORT_POOL_NEW,
1209 info->snd_portid, info->snd_seq, 0);
1210 if (err) {
1211 nlmsg_free(msg);
1212 return err;
1213 }
1214
1215 return genlmsg_reply(msg, info);
1216 }
1217
1218 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1219 struct devlink *devlink,
1220 struct devlink_sb *devlink_sb,
1221 u32 portid, u32 seq)
1222 {
1223 struct devlink_port *devlink_port;
1224 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1225 u16 pool_index;
1226 int err;
1227
1228 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1229 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1230 if (*p_idx < start) {
1231 (*p_idx)++;
1232 continue;
1233 }
1234 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1235 devlink_port,
1236 devlink_sb,
1237 pool_index,
1238 DEVLINK_CMD_SB_PORT_POOL_NEW,
1239 portid, seq,
1240 NLM_F_MULTI);
1241 if (err)
1242 return err;
1243 (*p_idx)++;
1244 }
1245 }
1246 return 0;
1247 }
1248
1249 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1250 struct netlink_callback *cb)
1251 {
1252 struct devlink *devlink;
1253 struct devlink_sb *devlink_sb;
1254 int start = cb->args[0];
1255 int idx = 0;
1256 int err = 0;
1257
1258 mutex_lock(&devlink_mutex);
1259 list_for_each_entry(devlink, &devlink_list, list) {
1260 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1261 !devlink->ops->sb_port_pool_get)
1262 continue;
1263 mutex_lock(&devlink->lock);
1264 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1265 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1266 devlink, devlink_sb,
1267 NETLINK_CB(cb->skb).portid,
1268 cb->nlh->nlmsg_seq);
1269 if (err && err != -EOPNOTSUPP) {
1270 mutex_unlock(&devlink->lock);
1271 goto out;
1272 }
1273 }
1274 mutex_unlock(&devlink->lock);
1275 }
1276 out:
1277 mutex_unlock(&devlink_mutex);
1278
1279 if (err != -EMSGSIZE)
1280 return err;
1281
1282 cb->args[0] = idx;
1283 return msg->len;
1284 }
1285
1286 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1287 unsigned int sb_index, u16 pool_index,
1288 u32 threshold,
1289 struct netlink_ext_ack *extack)
1290
1291 {
1292 const struct devlink_ops *ops = devlink_port->devlink->ops;
1293
1294 if (ops->sb_port_pool_set)
1295 return ops->sb_port_pool_set(devlink_port, sb_index,
1296 pool_index, threshold, extack);
1297 return -EOPNOTSUPP;
1298 }
1299
1300 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1301 struct genl_info *info)
1302 {
1303 struct devlink_port *devlink_port = info->user_ptr[0];
1304 struct devlink_sb *devlink_sb = info->user_ptr[1];
1305 u16 pool_index;
1306 u32 threshold;
1307 int err;
1308
1309 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1310 &pool_index);
1311 if (err)
1312 return err;
1313
1314 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1315 return -EINVAL;
1316
1317 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1318 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1319 pool_index, threshold, info->extack);
1320 }
1321
1322 static int
1323 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1324 struct devlink_port *devlink_port,
1325 struct devlink_sb *devlink_sb, u16 tc_index,
1326 enum devlink_sb_pool_type pool_type,
1327 enum devlink_command cmd,
1328 u32 portid, u32 seq, int flags)
1329 {
1330 const struct devlink_ops *ops = devlink->ops;
1331 u16 pool_index;
1332 u32 threshold;
1333 void *hdr;
1334 int err;
1335
1336 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1337 tc_index, pool_type,
1338 &pool_index, &threshold);
1339 if (err)
1340 return err;
1341
1342 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1343 if (!hdr)
1344 return -EMSGSIZE;
1345
1346 if (devlink_nl_put_handle(msg, devlink))
1347 goto nla_put_failure;
1348 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1349 goto nla_put_failure;
1350 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1351 goto nla_put_failure;
1352 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1353 goto nla_put_failure;
1354 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1355 goto nla_put_failure;
1356 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1357 goto nla_put_failure;
1358 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1359 goto nla_put_failure;
1360
1361 if (ops->sb_occ_tc_port_bind_get) {
1362 u32 cur;
1363 u32 max;
1364
1365 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1366 devlink_sb->index,
1367 tc_index, pool_type,
1368 &cur, &max);
1369 if (err && err != -EOPNOTSUPP)
1370 return err;
1371 if (!err) {
1372 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1373 goto nla_put_failure;
1374 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1375 goto nla_put_failure;
1376 }
1377 }
1378
1379 genlmsg_end(msg, hdr);
1380 return 0;
1381
1382 nla_put_failure:
1383 genlmsg_cancel(msg, hdr);
1384 return -EMSGSIZE;
1385 }
1386
1387 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1388 struct genl_info *info)
1389 {
1390 struct devlink_port *devlink_port = info->user_ptr[0];
1391 struct devlink *devlink = devlink_port->devlink;
1392 struct devlink_sb *devlink_sb = info->user_ptr[1];
1393 struct sk_buff *msg;
1394 enum devlink_sb_pool_type pool_type;
1395 u16 tc_index;
1396 int err;
1397
1398 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1399 if (err)
1400 return err;
1401
1402 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1403 pool_type, &tc_index);
1404 if (err)
1405 return err;
1406
1407 if (!devlink->ops->sb_tc_pool_bind_get)
1408 return -EOPNOTSUPP;
1409
1410 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1411 if (!msg)
1412 return -ENOMEM;
1413
1414 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1415 devlink_sb, tc_index, pool_type,
1416 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1417 info->snd_portid,
1418 info->snd_seq, 0);
1419 if (err) {
1420 nlmsg_free(msg);
1421 return err;
1422 }
1423
1424 return genlmsg_reply(msg, info);
1425 }
1426
1427 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1428 int start, int *p_idx,
1429 struct devlink *devlink,
1430 struct devlink_sb *devlink_sb,
1431 u32 portid, u32 seq)
1432 {
1433 struct devlink_port *devlink_port;
1434 u16 tc_index;
1435 int err;
1436
1437 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1438 for (tc_index = 0;
1439 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1440 if (*p_idx < start) {
1441 (*p_idx)++;
1442 continue;
1443 }
1444 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1445 devlink_port,
1446 devlink_sb,
1447 tc_index,
1448 DEVLINK_SB_POOL_TYPE_INGRESS,
1449 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1450 portid, seq,
1451 NLM_F_MULTI);
1452 if (err)
1453 return err;
1454 (*p_idx)++;
1455 }
1456 for (tc_index = 0;
1457 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1458 if (*p_idx < start) {
1459 (*p_idx)++;
1460 continue;
1461 }
1462 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1463 devlink_port,
1464 devlink_sb,
1465 tc_index,
1466 DEVLINK_SB_POOL_TYPE_EGRESS,
1467 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1468 portid, seq,
1469 NLM_F_MULTI);
1470 if (err)
1471 return err;
1472 (*p_idx)++;
1473 }
1474 }
1475 return 0;
1476 }
1477
1478 static int
1479 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1480 struct netlink_callback *cb)
1481 {
1482 struct devlink *devlink;
1483 struct devlink_sb *devlink_sb;
1484 int start = cb->args[0];
1485 int idx = 0;
1486 int err = 0;
1487
1488 mutex_lock(&devlink_mutex);
1489 list_for_each_entry(devlink, &devlink_list, list) {
1490 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1491 !devlink->ops->sb_tc_pool_bind_get)
1492 continue;
1493
1494 mutex_lock(&devlink->lock);
1495 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1496 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1497 devlink,
1498 devlink_sb,
1499 NETLINK_CB(cb->skb).portid,
1500 cb->nlh->nlmsg_seq);
1501 if (err && err != -EOPNOTSUPP) {
1502 mutex_unlock(&devlink->lock);
1503 goto out;
1504 }
1505 }
1506 mutex_unlock(&devlink->lock);
1507 }
1508 out:
1509 mutex_unlock(&devlink_mutex);
1510
1511 if (err != -EMSGSIZE)
1512 return err;
1513
1514 cb->args[0] = idx;
1515 return msg->len;
1516 }
1517
1518 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1519 unsigned int sb_index, u16 tc_index,
1520 enum devlink_sb_pool_type pool_type,
1521 u16 pool_index, u32 threshold,
1522 struct netlink_ext_ack *extack)
1523
1524 {
1525 const struct devlink_ops *ops = devlink_port->devlink->ops;
1526
1527 if (ops->sb_tc_pool_bind_set)
1528 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1529 tc_index, pool_type,
1530 pool_index, threshold, extack);
1531 return -EOPNOTSUPP;
1532 }
1533
1534 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1535 struct genl_info *info)
1536 {
1537 struct devlink_port *devlink_port = info->user_ptr[0];
1538 struct devlink_sb *devlink_sb = info->user_ptr[1];
1539 enum devlink_sb_pool_type pool_type;
1540 u16 tc_index;
1541 u16 pool_index;
1542 u32 threshold;
1543 int err;
1544
1545 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1546 if (err)
1547 return err;
1548
1549 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1550 pool_type, &tc_index);
1551 if (err)
1552 return err;
1553
1554 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1555 &pool_index);
1556 if (err)
1557 return err;
1558
1559 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1560 return -EINVAL;
1561
1562 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1563 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1564 tc_index, pool_type,
1565 pool_index, threshold, info->extack);
1566 }
1567
1568 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1569 struct genl_info *info)
1570 {
1571 struct devlink *devlink = info->user_ptr[0];
1572 struct devlink_sb *devlink_sb = info->user_ptr[1];
1573 const struct devlink_ops *ops = devlink->ops;
1574
1575 if (ops->sb_occ_snapshot)
1576 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1577 return -EOPNOTSUPP;
1578 }
1579
1580 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1581 struct genl_info *info)
1582 {
1583 struct devlink *devlink = info->user_ptr[0];
1584 struct devlink_sb *devlink_sb = info->user_ptr[1];
1585 const struct devlink_ops *ops = devlink->ops;
1586
1587 if (ops->sb_occ_max_clear)
1588 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1589 return -EOPNOTSUPP;
1590 }
1591
1592 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1593 enum devlink_command cmd, u32 portid,
1594 u32 seq, int flags)
1595 {
1596 const struct devlink_ops *ops = devlink->ops;
1597 enum devlink_eswitch_encap_mode encap_mode;
1598 u8 inline_mode;
1599 void *hdr;
1600 int err = 0;
1601 u16 mode;
1602
1603 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1604 if (!hdr)
1605 return -EMSGSIZE;
1606
1607 err = devlink_nl_put_handle(msg, devlink);
1608 if (err)
1609 goto nla_put_failure;
1610
1611 if (ops->eswitch_mode_get) {
1612 err = ops->eswitch_mode_get(devlink, &mode);
1613 if (err)
1614 goto nla_put_failure;
1615 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1616 if (err)
1617 goto nla_put_failure;
1618 }
1619
1620 if (ops->eswitch_inline_mode_get) {
1621 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1622 if (err)
1623 goto nla_put_failure;
1624 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1625 inline_mode);
1626 if (err)
1627 goto nla_put_failure;
1628 }
1629
1630 if (ops->eswitch_encap_mode_get) {
1631 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1632 if (err)
1633 goto nla_put_failure;
1634 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1635 if (err)
1636 goto nla_put_failure;
1637 }
1638
1639 genlmsg_end(msg, hdr);
1640 return 0;
1641
1642 nla_put_failure:
1643 genlmsg_cancel(msg, hdr);
1644 return err;
1645 }
1646
1647 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1648 struct genl_info *info)
1649 {
1650 struct devlink *devlink = info->user_ptr[0];
1651 struct sk_buff *msg;
1652 int err;
1653
1654 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1655 if (!msg)
1656 return -ENOMEM;
1657
1658 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1659 info->snd_portid, info->snd_seq, 0);
1660
1661 if (err) {
1662 nlmsg_free(msg);
1663 return err;
1664 }
1665
1666 return genlmsg_reply(msg, info);
1667 }
1668
1669 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1670 struct genl_info *info)
1671 {
1672 struct devlink *devlink = info->user_ptr[0];
1673 const struct devlink_ops *ops = devlink->ops;
1674 enum devlink_eswitch_encap_mode encap_mode;
1675 u8 inline_mode;
1676 int err = 0;
1677 u16 mode;
1678
1679 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1680 if (!ops->eswitch_mode_set)
1681 return -EOPNOTSUPP;
1682 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1683 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1684 if (err)
1685 return err;
1686 }
1687
1688 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1689 if (!ops->eswitch_inline_mode_set)
1690 return -EOPNOTSUPP;
1691 inline_mode = nla_get_u8(
1692 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1693 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1694 info->extack);
1695 if (err)
1696 return err;
1697 }
1698
1699 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1700 if (!ops->eswitch_encap_mode_set)
1701 return -EOPNOTSUPP;
1702 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1703 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1704 info->extack);
1705 if (err)
1706 return err;
1707 }
1708
1709 return 0;
1710 }
1711
1712 int devlink_dpipe_match_put(struct sk_buff *skb,
1713 struct devlink_dpipe_match *match)
1714 {
1715 struct devlink_dpipe_header *header = match->header;
1716 struct devlink_dpipe_field *field = &header->fields[match->field_id];
1717 struct nlattr *match_attr;
1718
1719 match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
1720 if (!match_attr)
1721 return -EMSGSIZE;
1722
1723 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1724 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1725 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1726 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1727 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1728 goto nla_put_failure;
1729
1730 nla_nest_end(skb, match_attr);
1731 return 0;
1732
1733 nla_put_failure:
1734 nla_nest_cancel(skb, match_attr);
1735 return -EMSGSIZE;
1736 }
1737 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1738
1739 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1740 struct sk_buff *skb)
1741 {
1742 struct nlattr *matches_attr;
1743
1744 matches_attr = nla_nest_start_noflag(skb,
1745 DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1746 if (!matches_attr)
1747 return -EMSGSIZE;
1748
1749 if (table->table_ops->matches_dump(table->priv, skb))
1750 goto nla_put_failure;
1751
1752 nla_nest_end(skb, matches_attr);
1753 return 0;
1754
1755 nla_put_failure:
1756 nla_nest_cancel(skb, matches_attr);
1757 return -EMSGSIZE;
1758 }
1759
1760 int devlink_dpipe_action_put(struct sk_buff *skb,
1761 struct devlink_dpipe_action *action)
1762 {
1763 struct devlink_dpipe_header *header = action->header;
1764 struct devlink_dpipe_field *field = &header->fields[action->field_id];
1765 struct nlattr *action_attr;
1766
1767 action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
1768 if (!action_attr)
1769 return -EMSGSIZE;
1770
1771 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1772 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1773 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1774 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1775 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1776 goto nla_put_failure;
1777
1778 nla_nest_end(skb, action_attr);
1779 return 0;
1780
1781 nla_put_failure:
1782 nla_nest_cancel(skb, action_attr);
1783 return -EMSGSIZE;
1784 }
1785 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1786
1787 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1788 struct sk_buff *skb)
1789 {
1790 struct nlattr *actions_attr;
1791
1792 actions_attr = nla_nest_start_noflag(skb,
1793 DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1794 if (!actions_attr)
1795 return -EMSGSIZE;
1796
1797 if (table->table_ops->actions_dump(table->priv, skb))
1798 goto nla_put_failure;
1799
1800 nla_nest_end(skb, actions_attr);
1801 return 0;
1802
1803 nla_put_failure:
1804 nla_nest_cancel(skb, actions_attr);
1805 return -EMSGSIZE;
1806 }
1807
1808 static int devlink_dpipe_table_put(struct sk_buff *skb,
1809 struct devlink_dpipe_table *table)
1810 {
1811 struct nlattr *table_attr;
1812 u64 table_size;
1813
1814 table_size = table->table_ops->size_get(table->priv);
1815 table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
1816 if (!table_attr)
1817 return -EMSGSIZE;
1818
1819 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1820 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1821 DEVLINK_ATTR_PAD))
1822 goto nla_put_failure;
1823 if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1824 table->counters_enabled))
1825 goto nla_put_failure;
1826
1827 if (table->resource_valid) {
1828 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1829 table->resource_id, DEVLINK_ATTR_PAD) ||
1830 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1831 table->resource_units, DEVLINK_ATTR_PAD))
1832 goto nla_put_failure;
1833 }
1834 if (devlink_dpipe_matches_put(table, skb))
1835 goto nla_put_failure;
1836
1837 if (devlink_dpipe_actions_put(table, skb))
1838 goto nla_put_failure;
1839
1840 nla_nest_end(skb, table_attr);
1841 return 0;
1842
1843 nla_put_failure:
1844 nla_nest_cancel(skb, table_attr);
1845 return -EMSGSIZE;
1846 }
1847
1848 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1849 struct genl_info *info)
1850 {
1851 int err;
1852
1853 if (*pskb) {
1854 err = genlmsg_reply(*pskb, info);
1855 if (err)
1856 return err;
1857 }
1858 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1859 if (!*pskb)
1860 return -ENOMEM;
1861 return 0;
1862 }
1863
1864 static int devlink_dpipe_tables_fill(struct genl_info *info,
1865 enum devlink_command cmd, int flags,
1866 struct list_head *dpipe_tables,
1867 const char *table_name)
1868 {
1869 struct devlink *devlink = info->user_ptr[0];
1870 struct devlink_dpipe_table *table;
1871 struct nlattr *tables_attr;
1872 struct sk_buff *skb = NULL;
1873 struct nlmsghdr *nlh;
1874 bool incomplete;
1875 void *hdr;
1876 int i;
1877 int err;
1878
1879 table = list_first_entry(dpipe_tables,
1880 struct devlink_dpipe_table, list);
1881 start_again:
1882 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1883 if (err)
1884 return err;
1885
1886 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1887 &devlink_nl_family, NLM_F_MULTI, cmd);
1888 if (!hdr) {
1889 nlmsg_free(skb);
1890 return -EMSGSIZE;
1891 }
1892
1893 if (devlink_nl_put_handle(skb, devlink))
1894 goto nla_put_failure;
1895 tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
1896 if (!tables_attr)
1897 goto nla_put_failure;
1898
1899 i = 0;
1900 incomplete = false;
1901 list_for_each_entry_from(table, dpipe_tables, list) {
1902 if (!table_name) {
1903 err = devlink_dpipe_table_put(skb, table);
1904 if (err) {
1905 if (!i)
1906 goto err_table_put;
1907 incomplete = true;
1908 break;
1909 }
1910 } else {
1911 if (!strcmp(table->name, table_name)) {
1912 err = devlink_dpipe_table_put(skb, table);
1913 if (err)
1914 break;
1915 }
1916 }
1917 i++;
1918 }
1919
1920 nla_nest_end(skb, tables_attr);
1921 genlmsg_end(skb, hdr);
1922 if (incomplete)
1923 goto start_again;
1924
1925 send_done:
1926 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1927 NLMSG_DONE, 0, flags | NLM_F_MULTI);
1928 if (!nlh) {
1929 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1930 if (err)
1931 return err;
1932 goto send_done;
1933 }
1934
1935 return genlmsg_reply(skb, info);
1936
1937 nla_put_failure:
1938 err = -EMSGSIZE;
1939 err_table_put:
1940 nlmsg_free(skb);
1941 return err;
1942 }
1943
1944 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1945 struct genl_info *info)
1946 {
1947 struct devlink *devlink = info->user_ptr[0];
1948 const char *table_name = NULL;
1949
1950 if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1951 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1952
1953 return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1954 &devlink->dpipe_table_list,
1955 table_name);
1956 }
1957
1958 static int devlink_dpipe_value_put(struct sk_buff *skb,
1959 struct devlink_dpipe_value *value)
1960 {
1961 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1962 value->value_size, value->value))
1963 return -EMSGSIZE;
1964 if (value->mask)
1965 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1966 value->value_size, value->mask))
1967 return -EMSGSIZE;
1968 if (value->mapping_valid)
1969 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1970 value->mapping_value))
1971 return -EMSGSIZE;
1972 return 0;
1973 }
1974
1975 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1976 struct devlink_dpipe_value *value)
1977 {
1978 if (!value->action)
1979 return -EINVAL;
1980 if (devlink_dpipe_action_put(skb, value->action))
1981 return -EMSGSIZE;
1982 if (devlink_dpipe_value_put(skb, value))
1983 return -EMSGSIZE;
1984 return 0;
1985 }
1986
1987 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1988 struct devlink_dpipe_value *values,
1989 unsigned int values_count)
1990 {
1991 struct nlattr *action_attr;
1992 int i;
1993 int err;
1994
1995 for (i = 0; i < values_count; i++) {
1996 action_attr = nla_nest_start_noflag(skb,
1997 DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1998 if (!action_attr)
1999 return -EMSGSIZE;
2000 err = devlink_dpipe_action_value_put(skb, &values[i]);
2001 if (err)
2002 goto err_action_value_put;
2003 nla_nest_end(skb, action_attr);
2004 }
2005 return 0;
2006
2007 err_action_value_put:
2008 nla_nest_cancel(skb, action_attr);
2009 return err;
2010 }
2011
2012 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
2013 struct devlink_dpipe_value *value)
2014 {
2015 if (!value->match)
2016 return -EINVAL;
2017 if (devlink_dpipe_match_put(skb, value->match))
2018 return -EMSGSIZE;
2019 if (devlink_dpipe_value_put(skb, value))
2020 return -EMSGSIZE;
2021 return 0;
2022 }
2023
2024 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
2025 struct devlink_dpipe_value *values,
2026 unsigned int values_count)
2027 {
2028 struct nlattr *match_attr;
2029 int i;
2030 int err;
2031
2032 for (i = 0; i < values_count; i++) {
2033 match_attr = nla_nest_start_noflag(skb,
2034 DEVLINK_ATTR_DPIPE_MATCH_VALUE);
2035 if (!match_attr)
2036 return -EMSGSIZE;
2037 err = devlink_dpipe_match_value_put(skb, &values[i]);
2038 if (err)
2039 goto err_match_value_put;
2040 nla_nest_end(skb, match_attr);
2041 }
2042 return 0;
2043
2044 err_match_value_put:
2045 nla_nest_cancel(skb, match_attr);
2046 return err;
2047 }
2048
2049 static int devlink_dpipe_entry_put(struct sk_buff *skb,
2050 struct devlink_dpipe_entry *entry)
2051 {
2052 struct nlattr *entry_attr, *matches_attr, *actions_attr;
2053 int err;
2054
2055 entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2056 if (!entry_attr)
2057 return -EMSGSIZE;
2058
2059 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2060 DEVLINK_ATTR_PAD))
2061 goto nla_put_failure;
2062 if (entry->counter_valid)
2063 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2064 entry->counter, DEVLINK_ATTR_PAD))
2065 goto nla_put_failure;
2066
2067 matches_attr = nla_nest_start_noflag(skb,
2068 DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2069 if (!matches_attr)
2070 goto nla_put_failure;
2071
2072 err = devlink_dpipe_match_values_put(skb, entry->match_values,
2073 entry->match_values_count);
2074 if (err) {
2075 nla_nest_cancel(skb, matches_attr);
2076 goto err_match_values_put;
2077 }
2078 nla_nest_end(skb, matches_attr);
2079
2080 actions_attr = nla_nest_start_noflag(skb,
2081 DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2082 if (!actions_attr)
2083 goto nla_put_failure;
2084
2085 err = devlink_dpipe_action_values_put(skb, entry->action_values,
2086 entry->action_values_count);
2087 if (err) {
2088 nla_nest_cancel(skb, actions_attr);
2089 goto err_action_values_put;
2090 }
2091 nla_nest_end(skb, actions_attr);
2092
2093 nla_nest_end(skb, entry_attr);
2094 return 0;
2095
2096 nla_put_failure:
2097 err = -EMSGSIZE;
2098 err_match_values_put:
2099 err_action_values_put:
2100 nla_nest_cancel(skb, entry_attr);
2101 return err;
2102 }
2103
2104 static struct devlink_dpipe_table *
2105 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2106 const char *table_name, struct devlink *devlink)
2107 {
2108 struct devlink_dpipe_table *table;
2109 list_for_each_entry_rcu(table, dpipe_tables, list,
2110 lockdep_is_held(&devlink->lock)) {
2111 if (!strcmp(table->name, table_name))
2112 return table;
2113 }
2114 return NULL;
2115 }
2116
2117 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2118 {
2119 struct devlink *devlink;
2120 int err;
2121
2122 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2123 dump_ctx->info);
2124 if (err)
2125 return err;
2126
2127 dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2128 dump_ctx->info->snd_portid,
2129 dump_ctx->info->snd_seq,
2130 &devlink_nl_family, NLM_F_MULTI,
2131 dump_ctx->cmd);
2132 if (!dump_ctx->hdr)
2133 goto nla_put_failure;
2134
2135 devlink = dump_ctx->info->user_ptr[0];
2136 if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2137 goto nla_put_failure;
2138 dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2139 DEVLINK_ATTR_DPIPE_ENTRIES);
2140 if (!dump_ctx->nest)
2141 goto nla_put_failure;
2142 return 0;
2143
2144 nla_put_failure:
2145 nlmsg_free(dump_ctx->skb);
2146 return -EMSGSIZE;
2147 }
2148 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2149
2150 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2151 struct devlink_dpipe_entry *entry)
2152 {
2153 return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2154 }
2155 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2156
2157 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2158 {
2159 nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2160 genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2161 return 0;
2162 }
2163 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2164
2165 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2166
2167 {
2168 unsigned int value_count, value_index;
2169 struct devlink_dpipe_value *value;
2170
2171 value = entry->action_values;
2172 value_count = entry->action_values_count;
2173 for (value_index = 0; value_index < value_count; value_index++) {
2174 kfree(value[value_index].value);
2175 kfree(value[value_index].mask);
2176 }
2177
2178 value = entry->match_values;
2179 value_count = entry->match_values_count;
2180 for (value_index = 0; value_index < value_count; value_index++) {
2181 kfree(value[value_index].value);
2182 kfree(value[value_index].mask);
2183 }
2184 }
2185 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2186
2187 static int devlink_dpipe_entries_fill(struct genl_info *info,
2188 enum devlink_command cmd, int flags,
2189 struct devlink_dpipe_table *table)
2190 {
2191 struct devlink_dpipe_dump_ctx dump_ctx;
2192 struct nlmsghdr *nlh;
2193 int err;
2194
2195 dump_ctx.skb = NULL;
2196 dump_ctx.cmd = cmd;
2197 dump_ctx.info = info;
2198
2199 err = table->table_ops->entries_dump(table->priv,
2200 table->counters_enabled,
2201 &dump_ctx);
2202 if (err)
2203 return err;
2204
2205 send_done:
2206 nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2207 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2208 if (!nlh) {
2209 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2210 if (err)
2211 return err;
2212 goto send_done;
2213 }
2214 return genlmsg_reply(dump_ctx.skb, info);
2215 }
2216
2217 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2218 struct genl_info *info)
2219 {
2220 struct devlink *devlink = info->user_ptr[0];
2221 struct devlink_dpipe_table *table;
2222 const char *table_name;
2223
2224 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2225 return -EINVAL;
2226
2227 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2228 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2229 table_name, devlink);
2230 if (!table)
2231 return -EINVAL;
2232
2233 if (!table->table_ops->entries_dump)
2234 return -EINVAL;
2235
2236 return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2237 0, table);
2238 }
2239
2240 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2241 const struct devlink_dpipe_header *header)
2242 {
2243 struct devlink_dpipe_field *field;
2244 struct nlattr *field_attr;
2245 int i;
2246
2247 for (i = 0; i < header->fields_count; i++) {
2248 field = &header->fields[i];
2249 field_attr = nla_nest_start_noflag(skb,
2250 DEVLINK_ATTR_DPIPE_FIELD);
2251 if (!field_attr)
2252 return -EMSGSIZE;
2253 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2254 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2255 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2256 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2257 goto nla_put_failure;
2258 nla_nest_end(skb, field_attr);
2259 }
2260 return 0;
2261
2262 nla_put_failure:
2263 nla_nest_cancel(skb, field_attr);
2264 return -EMSGSIZE;
2265 }
2266
2267 static int devlink_dpipe_header_put(struct sk_buff *skb,
2268 struct devlink_dpipe_header *header)
2269 {
2270 struct nlattr *fields_attr, *header_attr;
2271 int err;
2272
2273 header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2274 if (!header_attr)
2275 return -EMSGSIZE;
2276
2277 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2278 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2279 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2280 goto nla_put_failure;
2281
2282 fields_attr = nla_nest_start_noflag(skb,
2283 DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2284 if (!fields_attr)
2285 goto nla_put_failure;
2286
2287 err = devlink_dpipe_fields_put(skb, header);
2288 if (err) {
2289 nla_nest_cancel(skb, fields_attr);
2290 goto nla_put_failure;
2291 }
2292 nla_nest_end(skb, fields_attr);
2293 nla_nest_end(skb, header_attr);
2294 return 0;
2295
2296 nla_put_failure:
2297 err = -EMSGSIZE;
2298 nla_nest_cancel(skb, header_attr);
2299 return err;
2300 }
2301
2302 static int devlink_dpipe_headers_fill(struct genl_info *info,
2303 enum devlink_command cmd, int flags,
2304 struct devlink_dpipe_headers *
2305 dpipe_headers)
2306 {
2307 struct devlink *devlink = info->user_ptr[0];
2308 struct nlattr *headers_attr;
2309 struct sk_buff *skb = NULL;
2310 struct nlmsghdr *nlh;
2311 void *hdr;
2312 int i, j;
2313 int err;
2314
2315 i = 0;
2316 start_again:
2317 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2318 if (err)
2319 return err;
2320
2321 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2322 &devlink_nl_family, NLM_F_MULTI, cmd);
2323 if (!hdr) {
2324 nlmsg_free(skb);
2325 return -EMSGSIZE;
2326 }
2327
2328 if (devlink_nl_put_handle(skb, devlink))
2329 goto nla_put_failure;
2330 headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2331 if (!headers_attr)
2332 goto nla_put_failure;
2333
2334 j = 0;
2335 for (; i < dpipe_headers->headers_count; i++) {
2336 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2337 if (err) {
2338 if (!j)
2339 goto err_table_put;
2340 break;
2341 }
2342 j++;
2343 }
2344 nla_nest_end(skb, headers_attr);
2345 genlmsg_end(skb, hdr);
2346 if (i != dpipe_headers->headers_count)
2347 goto start_again;
2348
2349 send_done:
2350 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2351 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2352 if (!nlh) {
2353 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2354 if (err)
2355 return err;
2356 goto send_done;
2357 }
2358 return genlmsg_reply(skb, info);
2359
2360 nla_put_failure:
2361 err = -EMSGSIZE;
2362 err_table_put:
2363 nlmsg_free(skb);
2364 return err;
2365 }
2366
2367 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2368 struct genl_info *info)
2369 {
2370 struct devlink *devlink = info->user_ptr[0];
2371
2372 if (!devlink->dpipe_headers)
2373 return -EOPNOTSUPP;
2374 return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2375 0, devlink->dpipe_headers);
2376 }
2377
2378 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2379 const char *table_name,
2380 bool enable)
2381 {
2382 struct devlink_dpipe_table *table;
2383
2384 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2385 table_name, devlink);
2386 if (!table)
2387 return -EINVAL;
2388
2389 if (table->counter_control_extern)
2390 return -EOPNOTSUPP;
2391
2392 if (!(table->counters_enabled ^ enable))
2393 return 0;
2394
2395 table->counters_enabled = enable;
2396 if (table->table_ops->counters_set_update)
2397 table->table_ops->counters_set_update(table->priv, enable);
2398 return 0;
2399 }
2400
2401 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2402 struct genl_info *info)
2403 {
2404 struct devlink *devlink = info->user_ptr[0];
2405 const char *table_name;
2406 bool counters_enable;
2407
2408 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2409 !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2410 return -EINVAL;
2411
2412 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2413 counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2414
2415 return devlink_dpipe_table_counters_set(devlink, table_name,
2416 counters_enable);
2417 }
2418
2419 static struct devlink_resource *
2420 devlink_resource_find(struct devlink *devlink,
2421 struct devlink_resource *resource, u64 resource_id)
2422 {
2423 struct list_head *resource_list;
2424
2425 if (resource)
2426 resource_list = &resource->resource_list;
2427 else
2428 resource_list = &devlink->resource_list;
2429
2430 list_for_each_entry(resource, resource_list, list) {
2431 struct devlink_resource *child_resource;
2432
2433 if (resource->id == resource_id)
2434 return resource;
2435
2436 child_resource = devlink_resource_find(devlink, resource,
2437 resource_id);
2438 if (child_resource)
2439 return child_resource;
2440 }
2441 return NULL;
2442 }
2443
2444 static void
2445 devlink_resource_validate_children(struct devlink_resource *resource)
2446 {
2447 struct devlink_resource *child_resource;
2448 bool size_valid = true;
2449 u64 parts_size = 0;
2450
2451 if (list_empty(&resource->resource_list))
2452 goto out;
2453
2454 list_for_each_entry(child_resource, &resource->resource_list, list)
2455 parts_size += child_resource->size_new;
2456
2457 if (parts_size > resource->size_new)
2458 size_valid = false;
2459 out:
2460 resource->size_valid = size_valid;
2461 }
2462
2463 static int
2464 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2465 struct netlink_ext_ack *extack)
2466 {
2467 u64 reminder;
2468 int err = 0;
2469
2470 if (size > resource->size_params.size_max) {
2471 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2472 err = -EINVAL;
2473 }
2474
2475 if (size < resource->size_params.size_min) {
2476 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2477 err = -EINVAL;
2478 }
2479
2480 div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2481 if (reminder) {
2482 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2483 err = -EINVAL;
2484 }
2485
2486 return err;
2487 }
2488
2489 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2490 struct genl_info *info)
2491 {
2492 struct devlink *devlink = info->user_ptr[0];
2493 struct devlink_resource *resource;
2494 u64 resource_id;
2495 u64 size;
2496 int err;
2497
2498 if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2499 !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2500 return -EINVAL;
2501 resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2502
2503 resource = devlink_resource_find(devlink, NULL, resource_id);
2504 if (!resource)
2505 return -EINVAL;
2506
2507 size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2508 err = devlink_resource_validate_size(resource, size, info->extack);
2509 if (err)
2510 return err;
2511
2512 resource->size_new = size;
2513 devlink_resource_validate_children(resource);
2514 if (resource->parent)
2515 devlink_resource_validate_children(resource->parent);
2516 return 0;
2517 }
2518
2519 static int
2520 devlink_resource_size_params_put(struct devlink_resource *resource,
2521 struct sk_buff *skb)
2522 {
2523 struct devlink_resource_size_params *size_params;
2524
2525 size_params = &resource->size_params;
2526 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2527 size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2528 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2529 size_params->size_max, DEVLINK_ATTR_PAD) ||
2530 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2531 size_params->size_min, DEVLINK_ATTR_PAD) ||
2532 nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2533 return -EMSGSIZE;
2534 return 0;
2535 }
2536
2537 static int devlink_resource_occ_put(struct devlink_resource *resource,
2538 struct sk_buff *skb)
2539 {
2540 if (!resource->occ_get)
2541 return 0;
2542 return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2543 resource->occ_get(resource->occ_get_priv),
2544 DEVLINK_ATTR_PAD);
2545 }
2546
2547 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2548 struct devlink_resource *resource)
2549 {
2550 struct devlink_resource *child_resource;
2551 struct nlattr *child_resource_attr;
2552 struct nlattr *resource_attr;
2553
2554 resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2555 if (!resource_attr)
2556 return -EMSGSIZE;
2557
2558 if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2559 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2560 DEVLINK_ATTR_PAD) ||
2561 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2562 DEVLINK_ATTR_PAD))
2563 goto nla_put_failure;
2564 if (resource->size != resource->size_new)
2565 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2566 resource->size_new, DEVLINK_ATTR_PAD);
2567 if (devlink_resource_occ_put(resource, skb))
2568 goto nla_put_failure;
2569 if (devlink_resource_size_params_put(resource, skb))
2570 goto nla_put_failure;
2571 if (list_empty(&resource->resource_list))
2572 goto out;
2573
2574 if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2575 resource->size_valid))
2576 goto nla_put_failure;
2577
2578 child_resource_attr = nla_nest_start_noflag(skb,
2579 DEVLINK_ATTR_RESOURCE_LIST);
2580 if (!child_resource_attr)
2581 goto nla_put_failure;
2582
2583 list_for_each_entry(child_resource, &resource->resource_list, list) {
2584 if (devlink_resource_put(devlink, skb, child_resource))
2585 goto resource_put_failure;
2586 }
2587
2588 nla_nest_end(skb, child_resource_attr);
2589 out:
2590 nla_nest_end(skb, resource_attr);
2591 return 0;
2592
2593 resource_put_failure:
2594 nla_nest_cancel(skb, child_resource_attr);
2595 nla_put_failure:
2596 nla_nest_cancel(skb, resource_attr);
2597 return -EMSGSIZE;
2598 }
2599
2600 static int devlink_resource_fill(struct genl_info *info,
2601 enum devlink_command cmd, int flags)
2602 {
2603 struct devlink *devlink = info->user_ptr[0];
2604 struct devlink_resource *resource;
2605 struct nlattr *resources_attr;
2606 struct sk_buff *skb = NULL;
2607 struct nlmsghdr *nlh;
2608 bool incomplete;
2609 void *hdr;
2610 int i;
2611 int err;
2612
2613 resource = list_first_entry(&devlink->resource_list,
2614 struct devlink_resource, list);
2615 start_again:
2616 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2617 if (err)
2618 return err;
2619
2620 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2621 &devlink_nl_family, NLM_F_MULTI, cmd);
2622 if (!hdr) {
2623 nlmsg_free(skb);
2624 return -EMSGSIZE;
2625 }
2626
2627 if (devlink_nl_put_handle(skb, devlink))
2628 goto nla_put_failure;
2629
2630 resources_attr = nla_nest_start_noflag(skb,
2631 DEVLINK_ATTR_RESOURCE_LIST);
2632 if (!resources_attr)
2633 goto nla_put_failure;
2634
2635 incomplete = false;
2636 i = 0;
2637 list_for_each_entry_from(resource, &devlink->resource_list, list) {
2638 err = devlink_resource_put(devlink, skb, resource);
2639 if (err) {
2640 if (!i)
2641 goto err_resource_put;
2642 incomplete = true;
2643 break;
2644 }
2645 i++;
2646 }
2647 nla_nest_end(skb, resources_attr);
2648 genlmsg_end(skb, hdr);
2649 if (incomplete)
2650 goto start_again;
2651 send_done:
2652 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2653 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2654 if (!nlh) {
2655 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656 if (err)
2657 return err;
2658 goto send_done;
2659 }
2660 return genlmsg_reply(skb, info);
2661
2662 nla_put_failure:
2663 err = -EMSGSIZE;
2664 err_resource_put:
2665 nlmsg_free(skb);
2666 return err;
2667 }
2668
2669 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2670 struct genl_info *info)
2671 {
2672 struct devlink *devlink = info->user_ptr[0];
2673
2674 if (list_empty(&devlink->resource_list))
2675 return -EOPNOTSUPP;
2676
2677 return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2678 }
2679
2680 static int
2681 devlink_resources_validate(struct devlink *devlink,
2682 struct devlink_resource *resource,
2683 struct genl_info *info)
2684 {
2685 struct list_head *resource_list;
2686 int err = 0;
2687
2688 if (resource)
2689 resource_list = &resource->resource_list;
2690 else
2691 resource_list = &devlink->resource_list;
2692
2693 list_for_each_entry(resource, resource_list, list) {
2694 if (!resource->size_valid)
2695 return -EINVAL;
2696 err = devlink_resources_validate(devlink, resource, info);
2697 if (err)
2698 return err;
2699 }
2700 return err;
2701 }
2702
2703 static struct net *devlink_netns_get(struct sk_buff *skb,
2704 struct genl_info *info)
2705 {
2706 struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
2707 struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
2708 struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
2709 struct net *net;
2710
2711 if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
2712 NL_SET_ERR_MSG_MOD(info->extack, "multiple netns identifying attributes specified");
2713 return ERR_PTR(-EINVAL);
2714 }
2715
2716 if (netns_pid_attr) {
2717 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
2718 } else if (netns_fd_attr) {
2719 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
2720 } else if (netns_id_attr) {
2721 net = get_net_ns_by_id(sock_net(skb->sk),
2722 nla_get_u32(netns_id_attr));
2723 if (!net)
2724 net = ERR_PTR(-EINVAL);
2725 } else {
2726 WARN_ON(1);
2727 net = ERR_PTR(-EINVAL);
2728 }
2729 if (IS_ERR(net)) {
2730 NL_SET_ERR_MSG_MOD(info->extack, "Unknown network namespace");
2731 return ERR_PTR(-EINVAL);
2732 }
2733 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
2734 put_net(net);
2735 return ERR_PTR(-EPERM);
2736 }
2737 return net;
2738 }
2739
2740 static void devlink_param_notify(struct devlink *devlink,
2741 unsigned int port_index,
2742 struct devlink_param_item *param_item,
2743 enum devlink_command cmd);
2744
2745 static void devlink_reload_netns_change(struct devlink *devlink,
2746 struct net *dest_net)
2747 {
2748 struct devlink_param_item *param_item;
2749
2750 /* Userspace needs to be notified about devlink objects
2751 * removed from original and entering new network namespace.
2752 * The rest of the devlink objects are re-created during
2753 * reload process so the notifications are generated separatelly.
2754 */
2755
2756 list_for_each_entry(param_item, &devlink->param_list, list)
2757 devlink_param_notify(devlink, 0, param_item,
2758 DEVLINK_CMD_PARAM_DEL);
2759 devlink_notify(devlink, DEVLINK_CMD_DEL);
2760
2761 __devlink_net_set(devlink, dest_net);
2762
2763 devlink_notify(devlink, DEVLINK_CMD_NEW);
2764 list_for_each_entry(param_item, &devlink->param_list, list)
2765 devlink_param_notify(devlink, 0, param_item,
2766 DEVLINK_CMD_PARAM_NEW);
2767 }
2768
2769 static bool devlink_reload_supported(struct devlink *devlink)
2770 {
2771 return devlink->ops->reload_down && devlink->ops->reload_up;
2772 }
2773
2774 static void devlink_reload_failed_set(struct devlink *devlink,
2775 bool reload_failed)
2776 {
2777 if (devlink->reload_failed == reload_failed)
2778 return;
2779 devlink->reload_failed = reload_failed;
2780 devlink_notify(devlink, DEVLINK_CMD_NEW);
2781 }
2782
2783 bool devlink_is_reload_failed(const struct devlink *devlink)
2784 {
2785 return devlink->reload_failed;
2786 }
2787 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2788
2789 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
2790 struct netlink_ext_ack *extack)
2791 {
2792 int err;
2793
2794 if (!devlink->reload_enabled)
2795 return -EOPNOTSUPP;
2796
2797 err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2798 if (err)
2799 return err;
2800
2801 if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2802 devlink_reload_netns_change(devlink, dest_net);
2803
2804 err = devlink->ops->reload_up(devlink, extack);
2805 devlink_reload_failed_set(devlink, !!err);
2806 return err;
2807 }
2808
2809 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2810 {
2811 struct devlink *devlink = info->user_ptr[0];
2812 struct net *dest_net = NULL;
2813 int err;
2814
2815 if (!devlink_reload_supported(devlink) || !devlink->reload_enabled)
2816 return -EOPNOTSUPP;
2817
2818 err = devlink_resources_validate(devlink, NULL, info);
2819 if (err) {
2820 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2821 return err;
2822 }
2823
2824 if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
2825 info->attrs[DEVLINK_ATTR_NETNS_FD] ||
2826 info->attrs[DEVLINK_ATTR_NETNS_ID]) {
2827 dest_net = devlink_netns_get(skb, info);
2828 if (IS_ERR(dest_net))
2829 return PTR_ERR(dest_net);
2830 }
2831
2832 err = devlink_reload(devlink, dest_net, info->extack);
2833
2834 if (dest_net)
2835 put_net(dest_net);
2836
2837 return err;
2838 }
2839
2840 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2841 struct devlink *devlink,
2842 enum devlink_command cmd,
2843 const char *status_msg,
2844 const char *component,
2845 unsigned long done, unsigned long total)
2846 {
2847 void *hdr;
2848
2849 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2850 if (!hdr)
2851 return -EMSGSIZE;
2852
2853 if (devlink_nl_put_handle(msg, devlink))
2854 goto nla_put_failure;
2855
2856 if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2857 goto out;
2858
2859 if (status_msg &&
2860 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2861 status_msg))
2862 goto nla_put_failure;
2863 if (component &&
2864 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2865 component))
2866 goto nla_put_failure;
2867 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2868 done, DEVLINK_ATTR_PAD))
2869 goto nla_put_failure;
2870 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2871 total, DEVLINK_ATTR_PAD))
2872 goto nla_put_failure;
2873
2874 out:
2875 genlmsg_end(msg, hdr);
2876 return 0;
2877
2878 nla_put_failure:
2879 genlmsg_cancel(msg, hdr);
2880 return -EMSGSIZE;
2881 }
2882
2883 static void __devlink_flash_update_notify(struct devlink *devlink,
2884 enum devlink_command cmd,
2885 const char *status_msg,
2886 const char *component,
2887 unsigned long done,
2888 unsigned long total)
2889 {
2890 struct sk_buff *msg;
2891 int err;
2892
2893 WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2894 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2895 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2896
2897 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2898 if (!msg)
2899 return;
2900
2901 err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2902 component, done, total);
2903 if (err)
2904 goto out_free_msg;
2905
2906 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2907 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2908 return;
2909
2910 out_free_msg:
2911 nlmsg_free(msg);
2912 }
2913
2914 void devlink_flash_update_begin_notify(struct devlink *devlink)
2915 {
2916 __devlink_flash_update_notify(devlink,
2917 DEVLINK_CMD_FLASH_UPDATE,
2918 NULL, NULL, 0, 0);
2919 }
2920 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2921
2922 void devlink_flash_update_end_notify(struct devlink *devlink)
2923 {
2924 __devlink_flash_update_notify(devlink,
2925 DEVLINK_CMD_FLASH_UPDATE_END,
2926 NULL, NULL, 0, 0);
2927 }
2928 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2929
2930 void devlink_flash_update_status_notify(struct devlink *devlink,
2931 const char *status_msg,
2932 const char *component,
2933 unsigned long done,
2934 unsigned long total)
2935 {
2936 __devlink_flash_update_notify(devlink,
2937 DEVLINK_CMD_FLASH_UPDATE_STATUS,
2938 status_msg, component, done, total);
2939 }
2940 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2941
2942 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2943 struct genl_info *info)
2944 {
2945 struct devlink *devlink = info->user_ptr[0];
2946 const char *file_name, *component;
2947 struct nlattr *nla_component;
2948
2949 if (!devlink->ops->flash_update)
2950 return -EOPNOTSUPP;
2951
2952 if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2953 return -EINVAL;
2954 file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2955
2956 nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2957 component = nla_component ? nla_data(nla_component) : NULL;
2958
2959 return devlink->ops->flash_update(devlink, file_name, component,
2960 info->extack);
2961 }
2962
2963 static const struct devlink_param devlink_param_generic[] = {
2964 {
2965 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2966 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2967 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2968 },
2969 {
2970 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2971 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2972 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2973 },
2974 {
2975 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2976 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2977 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2978 },
2979 {
2980 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2981 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2982 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2983 },
2984 {
2985 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2986 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2987 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2988 },
2989 {
2990 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2991 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2992 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2993 },
2994 {
2995 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2996 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2997 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2998 },
2999 {
3000 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
3001 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
3002 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3003 },
3004 {
3005 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3006 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3007 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3008 },
3009 {
3010 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
3011 .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
3012 .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
3013 },
3014 };
3015
3016 static int devlink_param_generic_verify(const struct devlink_param *param)
3017 {
3018 /* verify it match generic parameter by id and name */
3019 if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3020 return -EINVAL;
3021 if (strcmp(param->name, devlink_param_generic[param->id].name))
3022 return -ENOENT;
3023
3024 WARN_ON(param->type != devlink_param_generic[param->id].type);
3025
3026 return 0;
3027 }
3028
3029 static int devlink_param_driver_verify(const struct devlink_param *param)
3030 {
3031 int i;
3032
3033 if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3034 return -EINVAL;
3035 /* verify no such name in generic params */
3036 for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3037 if (!strcmp(param->name, devlink_param_generic[i].name))
3038 return -EEXIST;
3039
3040 return 0;
3041 }
3042
3043 static struct devlink_param_item *
3044 devlink_param_find_by_name(struct list_head *param_list,
3045 const char *param_name)
3046 {
3047 struct devlink_param_item *param_item;
3048
3049 list_for_each_entry(param_item, param_list, list)
3050 if (!strcmp(param_item->param->name, param_name))
3051 return param_item;
3052 return NULL;
3053 }
3054
3055 static struct devlink_param_item *
3056 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3057 {
3058 struct devlink_param_item *param_item;
3059
3060 list_for_each_entry(param_item, param_list, list)
3061 if (param_item->param->id == param_id)
3062 return param_item;
3063 return NULL;
3064 }
3065
3066 static bool
3067 devlink_param_cmode_is_supported(const struct devlink_param *param,
3068 enum devlink_param_cmode cmode)
3069 {
3070 return test_bit(cmode, &param->supported_cmodes);
3071 }
3072
3073 static int devlink_param_get(struct devlink *devlink,
3074 const struct devlink_param *param,
3075 struct devlink_param_gset_ctx *ctx)
3076 {
3077 if (!param->get)
3078 return -EOPNOTSUPP;
3079 return param->get(devlink, param->id, ctx);
3080 }
3081
3082 static int devlink_param_set(struct devlink *devlink,
3083 const struct devlink_param *param,
3084 struct devlink_param_gset_ctx *ctx)
3085 {
3086 if (!param->set)
3087 return -EOPNOTSUPP;
3088 return param->set(devlink, param->id, ctx);
3089 }
3090
3091 static int
3092 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3093 {
3094 switch (param_type) {
3095 case DEVLINK_PARAM_TYPE_U8:
3096 return NLA_U8;
3097 case DEVLINK_PARAM_TYPE_U16:
3098 return NLA_U16;
3099 case DEVLINK_PARAM_TYPE_U32:
3100 return NLA_U32;
3101 case DEVLINK_PARAM_TYPE_STRING:
3102 return NLA_STRING;
3103 case DEVLINK_PARAM_TYPE_BOOL:
3104 return NLA_FLAG;
3105 default:
3106 return -EINVAL;
3107 }
3108 }
3109
3110 static int
3111 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3112 enum devlink_param_type type,
3113 enum devlink_param_cmode cmode,
3114 union devlink_param_value val)
3115 {
3116 struct nlattr *param_value_attr;
3117
3118 param_value_attr = nla_nest_start_noflag(msg,
3119 DEVLINK_ATTR_PARAM_VALUE);
3120 if (!param_value_attr)
3121 goto nla_put_failure;
3122
3123 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3124 goto value_nest_cancel;
3125
3126 switch (type) {
3127 case DEVLINK_PARAM_TYPE_U8:
3128 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3129 goto value_nest_cancel;
3130 break;
3131 case DEVLINK_PARAM_TYPE_U16:
3132 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3133 goto value_nest_cancel;
3134 break;
3135 case DEVLINK_PARAM_TYPE_U32:
3136 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3137 goto value_nest_cancel;
3138 break;
3139 case DEVLINK_PARAM_TYPE_STRING:
3140 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3141 val.vstr))
3142 goto value_nest_cancel;
3143 break;
3144 case DEVLINK_PARAM_TYPE_BOOL:
3145 if (val.vbool &&
3146 nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3147 goto value_nest_cancel;
3148 break;
3149 }
3150
3151 nla_nest_end(msg, param_value_attr);
3152 return 0;
3153
3154 value_nest_cancel:
3155 nla_nest_cancel(msg, param_value_attr);
3156 nla_put_failure:
3157 return -EMSGSIZE;
3158 }
3159
3160 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3161 unsigned int port_index,
3162 struct devlink_param_item *param_item,
3163 enum devlink_command cmd,
3164 u32 portid, u32 seq, int flags)
3165 {
3166 union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3167 bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3168 const struct devlink_param *param = param_item->param;
3169 struct devlink_param_gset_ctx ctx;
3170 struct nlattr *param_values_list;
3171 struct nlattr *param_attr;
3172 int nla_type;
3173 void *hdr;
3174 int err;
3175 int i;
3176
3177 /* Get value from driver part to driverinit configuration mode */
3178 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3179 if (!devlink_param_cmode_is_supported(param, i))
3180 continue;
3181 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3182 if (!param_item->driverinit_value_valid)
3183 return -EOPNOTSUPP;
3184 param_value[i] = param_item->driverinit_value;
3185 } else {
3186 if (!param_item->published)
3187 continue;
3188 ctx.cmode = i;
3189 err = devlink_param_get(devlink, param, &ctx);
3190 if (err)
3191 return err;
3192 param_value[i] = ctx.val;
3193 }
3194 param_value_set[i] = true;
3195 }
3196
3197 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3198 if (!hdr)
3199 return -EMSGSIZE;
3200
3201 if (devlink_nl_put_handle(msg, devlink))
3202 goto genlmsg_cancel;
3203
3204 if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3205 cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3206 cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3207 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3208 goto genlmsg_cancel;
3209
3210 param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3211 if (!param_attr)
3212 goto genlmsg_cancel;
3213 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3214 goto param_nest_cancel;
3215 if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3216 goto param_nest_cancel;
3217
3218 nla_type = devlink_param_type_to_nla_type(param->type);
3219 if (nla_type < 0)
3220 goto param_nest_cancel;
3221 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3222 goto param_nest_cancel;
3223
3224 param_values_list = nla_nest_start_noflag(msg,
3225 DEVLINK_ATTR_PARAM_VALUES_LIST);
3226 if (!param_values_list)
3227 goto param_nest_cancel;
3228
3229 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3230 if (!param_value_set[i])
3231 continue;
3232 err = devlink_nl_param_value_fill_one(msg, param->type,
3233 i, param_value[i]);
3234 if (err)
3235 goto values_list_nest_cancel;
3236 }
3237
3238 nla_nest_end(msg, param_values_list);
3239 nla_nest_end(msg, param_attr);
3240 genlmsg_end(msg, hdr);
3241 return 0;
3242
3243 values_list_nest_cancel:
3244 nla_nest_end(msg, param_values_list);
3245 param_nest_cancel:
3246 nla_nest_cancel(msg, param_attr);
3247 genlmsg_cancel:
3248 genlmsg_cancel(msg, hdr);
3249 return -EMSGSIZE;
3250 }
3251
3252 static void devlink_param_notify(struct devlink *devlink,
3253 unsigned int port_index,
3254 struct devlink_param_item *param_item,
3255 enum devlink_command cmd)
3256 {
3257 struct sk_buff *msg;
3258 int err;
3259
3260 WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3261 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3262 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3263
3264 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3265 if (!msg)
3266 return;
3267 err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3268 0, 0, 0);
3269 if (err) {
3270 nlmsg_free(msg);
3271 return;
3272 }
3273
3274 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3275 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3276 }
3277
3278 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3279 struct netlink_callback *cb)
3280 {
3281 struct devlink_param_item *param_item;
3282 struct devlink *devlink;
3283 int start = cb->args[0];
3284 int idx = 0;
3285 int err = 0;
3286
3287 mutex_lock(&devlink_mutex);
3288 list_for_each_entry(devlink, &devlink_list, list) {
3289 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3290 continue;
3291 mutex_lock(&devlink->lock);
3292 list_for_each_entry(param_item, &devlink->param_list, list) {
3293 if (idx < start) {
3294 idx++;
3295 continue;
3296 }
3297 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3298 DEVLINK_CMD_PARAM_GET,
3299 NETLINK_CB(cb->skb).portid,
3300 cb->nlh->nlmsg_seq,
3301 NLM_F_MULTI);
3302 if (err && err != -EOPNOTSUPP) {
3303 mutex_unlock(&devlink->lock);
3304 goto out;
3305 }
3306 idx++;
3307 }
3308 mutex_unlock(&devlink->lock);
3309 }
3310 out:
3311 mutex_unlock(&devlink_mutex);
3312
3313 if (err != -EMSGSIZE)
3314 return err;
3315
3316 cb->args[0] = idx;
3317 return msg->len;
3318 }
3319
3320 static int
3321 devlink_param_type_get_from_info(struct genl_info *info,
3322 enum devlink_param_type *param_type)
3323 {
3324 if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3325 return -EINVAL;
3326
3327 switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3328 case NLA_U8:
3329 *param_type = DEVLINK_PARAM_TYPE_U8;
3330 break;
3331 case NLA_U16:
3332 *param_type = DEVLINK_PARAM_TYPE_U16;
3333 break;
3334 case NLA_U32:
3335 *param_type = DEVLINK_PARAM_TYPE_U32;
3336 break;
3337 case NLA_STRING:
3338 *param_type = DEVLINK_PARAM_TYPE_STRING;
3339 break;
3340 case NLA_FLAG:
3341 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3342 break;
3343 default:
3344 return -EINVAL;
3345 }
3346
3347 return 0;
3348 }
3349
3350 static int
3351 devlink_param_value_get_from_info(const struct devlink_param *param,
3352 struct genl_info *info,
3353 union devlink_param_value *value)
3354 {
3355 struct nlattr *param_data;
3356 int len;
3357
3358 param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
3359
3360 if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
3361 return -EINVAL;
3362
3363 switch (param->type) {
3364 case DEVLINK_PARAM_TYPE_U8:
3365 if (nla_len(param_data) != sizeof(u8))
3366 return -EINVAL;
3367 value->vu8 = nla_get_u8(param_data);
3368 break;
3369 case DEVLINK_PARAM_TYPE_U16:
3370 if (nla_len(param_data) != sizeof(u16))
3371 return -EINVAL;
3372 value->vu16 = nla_get_u16(param_data);
3373 break;
3374 case DEVLINK_PARAM_TYPE_U32:
3375 if (nla_len(param_data) != sizeof(u32))
3376 return -EINVAL;
3377 value->vu32 = nla_get_u32(param_data);
3378 break;
3379 case DEVLINK_PARAM_TYPE_STRING:
3380 len = strnlen(nla_data(param_data), nla_len(param_data));
3381 if (len == nla_len(param_data) ||
3382 len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3383 return -EINVAL;
3384 strcpy(value->vstr, nla_data(param_data));
3385 break;
3386 case DEVLINK_PARAM_TYPE_BOOL:
3387 if (param_data && nla_len(param_data))
3388 return -EINVAL;
3389 value->vbool = nla_get_flag(param_data);
3390 break;
3391 }
3392 return 0;
3393 }
3394
3395 static struct devlink_param_item *
3396 devlink_param_get_from_info(struct list_head *param_list,
3397 struct genl_info *info)
3398 {
3399 char *param_name;
3400
3401 if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3402 return NULL;
3403
3404 param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3405 return devlink_param_find_by_name(param_list, param_name);
3406 }
3407
3408 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3409 struct genl_info *info)
3410 {
3411 struct devlink *devlink = info->user_ptr[0];
3412 struct devlink_param_item *param_item;
3413 struct sk_buff *msg;
3414 int err;
3415
3416 param_item = devlink_param_get_from_info(&devlink->param_list, info);
3417 if (!param_item)
3418 return -EINVAL;
3419
3420 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3421 if (!msg)
3422 return -ENOMEM;
3423
3424 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3425 DEVLINK_CMD_PARAM_GET,
3426 info->snd_portid, info->snd_seq, 0);
3427 if (err) {
3428 nlmsg_free(msg);
3429 return err;
3430 }
3431
3432 return genlmsg_reply(msg, info);
3433 }
3434
3435 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3436 unsigned int port_index,
3437 struct list_head *param_list,
3438 struct genl_info *info,
3439 enum devlink_command cmd)
3440 {
3441 enum devlink_param_type param_type;
3442 struct devlink_param_gset_ctx ctx;
3443 enum devlink_param_cmode cmode;
3444 struct devlink_param_item *param_item;
3445 const struct devlink_param *param;
3446 union devlink_param_value value;
3447 int err = 0;
3448
3449 param_item = devlink_param_get_from_info(param_list, info);
3450 if (!param_item)
3451 return -EINVAL;
3452 param = param_item->param;
3453 err = devlink_param_type_get_from_info(info, &param_type);
3454 if (err)
3455 return err;
3456 if (param_type != param->type)
3457 return -EINVAL;
3458 err = devlink_param_value_get_from_info(param, info, &value);
3459 if (err)
3460 return err;
3461 if (param->validate) {
3462 err = param->validate(devlink, param->id, value, info->extack);
3463 if (err)
3464 return err;
3465 }
3466
3467 if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3468 return -EINVAL;
3469 cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3470 if (!devlink_param_cmode_is_supported(param, cmode))
3471 return -EOPNOTSUPP;
3472
3473 if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3474 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3475 strcpy(param_item->driverinit_value.vstr, value.vstr);
3476 else
3477 param_item->driverinit_value = value;
3478 param_item->driverinit_value_valid = true;
3479 } else {
3480 if (!param->set)
3481 return -EOPNOTSUPP;
3482 ctx.val = value;
3483 ctx.cmode = cmode;
3484 err = devlink_param_set(devlink, param, &ctx);
3485 if (err)
3486 return err;
3487 }
3488
3489 devlink_param_notify(devlink, port_index, param_item, cmd);
3490 return 0;
3491 }
3492
3493 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3494 struct genl_info *info)
3495 {
3496 struct devlink *devlink = info->user_ptr[0];
3497
3498 return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3499 info, DEVLINK_CMD_PARAM_NEW);
3500 }
3501
3502 static int devlink_param_register_one(struct devlink *devlink,
3503 unsigned int port_index,
3504 struct list_head *param_list,
3505 const struct devlink_param *param,
3506 enum devlink_command cmd)
3507 {
3508 struct devlink_param_item *param_item;
3509
3510 if (devlink_param_find_by_name(param_list, param->name))
3511 return -EEXIST;
3512
3513 if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3514 WARN_ON(param->get || param->set);
3515 else
3516 WARN_ON(!param->get || !param->set);
3517
3518 param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3519 if (!param_item)
3520 return -ENOMEM;
3521 param_item->param = param;
3522
3523 list_add_tail(&param_item->list, param_list);
3524 devlink_param_notify(devlink, port_index, param_item, cmd);
3525 return 0;
3526 }
3527
3528 static void devlink_param_unregister_one(struct devlink *devlink,
3529 unsigned int port_index,
3530 struct list_head *param_list,
3531 const struct devlink_param *param,
3532 enum devlink_command cmd)
3533 {
3534 struct devlink_param_item *param_item;
3535
3536 param_item = devlink_param_find_by_name(param_list, param->name);
3537 WARN_ON(!param_item);
3538 devlink_param_notify(devlink, port_index, param_item, cmd);
3539 list_del(&param_item->list);
3540 kfree(param_item);
3541 }
3542
3543 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3544 struct netlink_callback *cb)
3545 {
3546 struct devlink_param_item *param_item;
3547 struct devlink_port *devlink_port;
3548 struct devlink *devlink;
3549 int start = cb->args[0];
3550 int idx = 0;
3551 int err = 0;
3552
3553 mutex_lock(&devlink_mutex);
3554 list_for_each_entry(devlink, &devlink_list, list) {
3555 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3556 continue;
3557 mutex_lock(&devlink->lock);
3558 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3559 list_for_each_entry(param_item,
3560 &devlink_port->param_list, list) {
3561 if (idx < start) {
3562 idx++;
3563 continue;
3564 }
3565 err = devlink_nl_param_fill(msg,
3566 devlink_port->devlink,
3567 devlink_port->index, param_item,
3568 DEVLINK_CMD_PORT_PARAM_GET,
3569 NETLINK_CB(cb->skb).portid,
3570 cb->nlh->nlmsg_seq,
3571 NLM_F_MULTI);
3572 if (err && err != -EOPNOTSUPP) {
3573 mutex_unlock(&devlink->lock);
3574 goto out;
3575 }
3576 idx++;
3577 }
3578 }
3579 mutex_unlock(&devlink->lock);
3580 }
3581 out:
3582 mutex_unlock(&devlink_mutex);
3583
3584 if (err != -EMSGSIZE)
3585 return err;
3586
3587 cb->args[0] = idx;
3588 return msg->len;
3589 }
3590
3591 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3592 struct genl_info *info)
3593 {
3594 struct devlink_port *devlink_port = info->user_ptr[0];
3595 struct devlink_param_item *param_item;
3596 struct sk_buff *msg;
3597 int err;
3598
3599 param_item = devlink_param_get_from_info(&devlink_port->param_list,
3600 info);
3601 if (!param_item)
3602 return -EINVAL;
3603
3604 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3605 if (!msg)
3606 return -ENOMEM;
3607
3608 err = devlink_nl_param_fill(msg, devlink_port->devlink,
3609 devlink_port->index, param_item,
3610 DEVLINK_CMD_PORT_PARAM_GET,
3611 info->snd_portid, info->snd_seq, 0);
3612 if (err) {
3613 nlmsg_free(msg);
3614 return err;
3615 }
3616
3617 return genlmsg_reply(msg, info);
3618 }
3619
3620 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3621 struct genl_info *info)
3622 {
3623 struct devlink_port *devlink_port = info->user_ptr[0];
3624
3625 return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3626 devlink_port->index,
3627 &devlink_port->param_list, info,
3628 DEVLINK_CMD_PORT_PARAM_NEW);
3629 }
3630
3631 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3632 struct devlink *devlink,
3633 struct devlink_snapshot *snapshot)
3634 {
3635 struct nlattr *snap_attr;
3636 int err;
3637
3638 snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3639 if (!snap_attr)
3640 return -EINVAL;
3641
3642 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3643 if (err)
3644 goto nla_put_failure;
3645
3646 nla_nest_end(msg, snap_attr);
3647 return 0;
3648
3649 nla_put_failure:
3650 nla_nest_cancel(msg, snap_attr);
3651 return err;
3652 }
3653
3654 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3655 struct devlink *devlink,
3656 struct devlink_region *region)
3657 {
3658 struct devlink_snapshot *snapshot;
3659 struct nlattr *snapshots_attr;
3660 int err;
3661
3662 snapshots_attr = nla_nest_start_noflag(msg,
3663 DEVLINK_ATTR_REGION_SNAPSHOTS);
3664 if (!snapshots_attr)
3665 return -EINVAL;
3666
3667 list_for_each_entry(snapshot, &region->snapshot_list, list) {
3668 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3669 if (err)
3670 goto nla_put_failure;
3671 }
3672
3673 nla_nest_end(msg, snapshots_attr);
3674 return 0;
3675
3676 nla_put_failure:
3677 nla_nest_cancel(msg, snapshots_attr);
3678 return err;
3679 }
3680
3681 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3682 enum devlink_command cmd, u32 portid,
3683 u32 seq, int flags,
3684 struct devlink_region *region)
3685 {
3686 void *hdr;
3687 int err;
3688
3689 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3690 if (!hdr)
3691 return -EMSGSIZE;
3692
3693 err = devlink_nl_put_handle(msg, devlink);
3694 if (err)
3695 goto nla_put_failure;
3696
3697 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name);
3698 if (err)
3699 goto nla_put_failure;
3700
3701 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3702 region->size,
3703 DEVLINK_ATTR_PAD);
3704 if (err)
3705 goto nla_put_failure;
3706
3707 err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3708 if (err)
3709 goto nla_put_failure;
3710
3711 genlmsg_end(msg, hdr);
3712 return 0;
3713
3714 nla_put_failure:
3715 genlmsg_cancel(msg, hdr);
3716 return err;
3717 }
3718
3719 static void devlink_nl_region_notify(struct devlink_region *region,
3720 struct devlink_snapshot *snapshot,
3721 enum devlink_command cmd)
3722 {
3723 struct devlink *devlink = region->devlink;
3724 struct sk_buff *msg;
3725 void *hdr;
3726 int err;
3727
3728 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3729
3730 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3731 if (!msg)
3732 return;
3733
3734 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3735 if (!hdr)
3736 goto out_free_msg;
3737
3738 err = devlink_nl_put_handle(msg, devlink);
3739 if (err)
3740 goto out_cancel_msg;
3741
3742 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3743 region->ops->name);
3744 if (err)
3745 goto out_cancel_msg;
3746
3747 if (snapshot) {
3748 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3749 snapshot->id);
3750 if (err)
3751 goto out_cancel_msg;
3752 } else {
3753 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3754 region->size, DEVLINK_ATTR_PAD);
3755 if (err)
3756 goto out_cancel_msg;
3757 }
3758 genlmsg_end(msg, hdr);
3759
3760 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3761 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3762
3763 return;
3764
3765 out_cancel_msg:
3766 genlmsg_cancel(msg, hdr);
3767 out_free_msg:
3768 nlmsg_free(msg);
3769 }
3770
3771 /**
3772 * __devlink_snapshot_id_increment - Increment number of snapshots using an id
3773 * @devlink: devlink instance
3774 * @id: the snapshot id
3775 *
3776 * Track when a new snapshot begins using an id. Load the count for the
3777 * given id from the snapshot xarray, increment it, and store it back.
3778 *
3779 * Called when a new snapshot is created with the given id.
3780 *
3781 * The id *must* have been previously allocated by
3782 * devlink_region_snapshot_id_get().
3783 *
3784 * Returns 0 on success, or an error on failure.
3785 */
3786 static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
3787 {
3788 unsigned long count;
3789 void *p;
3790
3791 lockdep_assert_held(&devlink->lock);
3792
3793 p = xa_load(&devlink->snapshot_ids, id);
3794 if (WARN_ON(!p))
3795 return -EINVAL;
3796
3797 if (WARN_ON(!xa_is_value(p)))
3798 return -EINVAL;
3799
3800 count = xa_to_value(p);
3801 count++;
3802
3803 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
3804 GFP_KERNEL));
3805 }
3806
3807 /**
3808 * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id
3809 * @devlink: devlink instance
3810 * @id: the snapshot id
3811 *
3812 * Track when a snapshot is deleted and stops using an id. Load the count
3813 * for the given id from the snapshot xarray, decrement it, and store it
3814 * back.
3815 *
3816 * If the count reaches zero, erase this id from the xarray, freeing it
3817 * up for future re-use by devlink_region_snapshot_id_get().
3818 *
3819 * Called when a snapshot using the given id is deleted, and when the
3820 * initial allocator of the id is finished using it.
3821 */
3822 static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
3823 {
3824 unsigned long count;
3825 void *p;
3826
3827 lockdep_assert_held(&devlink->lock);
3828
3829 p = xa_load(&devlink->snapshot_ids, id);
3830 if (WARN_ON(!p))
3831 return;
3832
3833 if (WARN_ON(!xa_is_value(p)))
3834 return;
3835
3836 count = xa_to_value(p);
3837
3838 if (count > 1) {
3839 count--;
3840 xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
3841 GFP_KERNEL);
3842 } else {
3843 /* If this was the last user, we can erase this id */
3844 xa_erase(&devlink->snapshot_ids, id);
3845 }
3846 }
3847
3848 /**
3849 * __devlink_snapshot_id_insert - Insert a specific snapshot ID
3850 * @devlink: devlink instance
3851 * @id: the snapshot id
3852 *
3853 * Mark the given snapshot id as used by inserting a zero value into the
3854 * snapshot xarray.
3855 *
3856 * This must be called while holding the devlink instance lock. Unlike
3857 * devlink_snapshot_id_get, the initial reference count is zero, not one.
3858 * It is expected that the id will immediately be used before
3859 * releasing the devlink instance lock.
3860 *
3861 * Returns zero on success, or an error code if the snapshot id could not
3862 * be inserted.
3863 */
3864 static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
3865 {
3866 lockdep_assert_held(&devlink->lock);
3867
3868 if (WARN_ON(xa_load(&devlink->snapshot_ids, id)))
3869 return -EEXIST;
3870
3871 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
3872 GFP_KERNEL));
3873 }
3874
3875 /**
3876 * __devlink_region_snapshot_id_get - get snapshot ID
3877 * @devlink: devlink instance
3878 * @id: storage to return snapshot id
3879 *
3880 * Allocates a new snapshot id. Returns zero on success, or a negative
3881 * error on failure. Must be called while holding the devlink instance
3882 * lock.
3883 *
3884 * Snapshot IDs are tracked using an xarray which stores the number of
3885 * users of the snapshot id.
3886 *
3887 * Note that the caller of this function counts as a 'user', in order to
3888 * avoid race conditions. The caller must release its hold on the
3889 * snapshot by using devlink_region_snapshot_id_put.
3890 */
3891 static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
3892 {
3893 lockdep_assert_held(&devlink->lock);
3894
3895 return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
3896 xa_limit_32b, GFP_KERNEL);
3897 }
3898
3899 /**
3900 * __devlink_region_snapshot_create - create a new snapshot
3901 * This will add a new snapshot of a region. The snapshot
3902 * will be stored on the region struct and can be accessed
3903 * from devlink. This is useful for future analyses of snapshots.
3904 * Multiple snapshots can be created on a region.
3905 * The @snapshot_id should be obtained using the getter function.
3906 *
3907 * Must be called only while holding the devlink instance lock.
3908 *
3909 * @region: devlink region of the snapshot
3910 * @data: snapshot data
3911 * @snapshot_id: snapshot id to be created
3912 */
3913 static int
3914 __devlink_region_snapshot_create(struct devlink_region *region,
3915 u8 *data, u32 snapshot_id)
3916 {
3917 struct devlink *devlink = region->devlink;
3918 struct devlink_snapshot *snapshot;
3919 int err;
3920
3921 lockdep_assert_held(&devlink->lock);
3922
3923 /* check if region can hold one more snapshot */
3924 if (region->cur_snapshots == region->max_snapshots)
3925 return -ENOSPC;
3926
3927 if (devlink_region_snapshot_get_by_id(region, snapshot_id))
3928 return -EEXIST;
3929
3930 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
3931 if (!snapshot)
3932 return -ENOMEM;
3933
3934 err = __devlink_snapshot_id_increment(devlink, snapshot_id);
3935 if (err)
3936 goto err_snapshot_id_increment;
3937
3938 snapshot->id = snapshot_id;
3939 snapshot->region = region;
3940 snapshot->data = data;
3941
3942 list_add_tail(&snapshot->list, &region->snapshot_list);
3943
3944 region->cur_snapshots++;
3945
3946 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
3947 return 0;
3948
3949 err_snapshot_id_increment:
3950 kfree(snapshot);
3951 return err;
3952 }
3953
3954 static void devlink_region_snapshot_del(struct devlink_region *region,
3955 struct devlink_snapshot *snapshot)
3956 {
3957 struct devlink *devlink = region->devlink;
3958
3959 lockdep_assert_held(&devlink->lock);
3960
3961 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3962 region->cur_snapshots--;
3963 list_del(&snapshot->list);
3964 region->ops->destructor(snapshot->data);
3965 __devlink_snapshot_id_decrement(devlink, snapshot->id);
3966 kfree(snapshot);
3967 }
3968
3969 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3970 struct genl_info *info)
3971 {
3972 struct devlink *devlink = info->user_ptr[0];
3973 struct devlink_region *region;
3974 const char *region_name;
3975 struct sk_buff *msg;
3976 int err;
3977
3978 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3979 return -EINVAL;
3980
3981 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3982 region = devlink_region_get_by_name(devlink, region_name);
3983 if (!region)
3984 return -EINVAL;
3985
3986 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3987 if (!msg)
3988 return -ENOMEM;
3989
3990 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3991 info->snd_portid, info->snd_seq, 0,
3992 region);
3993 if (err) {
3994 nlmsg_free(msg);
3995 return err;
3996 }
3997
3998 return genlmsg_reply(msg, info);
3999 }
4000
4001 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
4002 struct netlink_callback *cb)
4003 {
4004 struct devlink_region *region;
4005 struct devlink *devlink;
4006 int start = cb->args[0];
4007 int idx = 0;
4008 int err;
4009
4010 mutex_lock(&devlink_mutex);
4011 list_for_each_entry(devlink, &devlink_list, list) {
4012 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4013 continue;
4014
4015 mutex_lock(&devlink->lock);
4016 list_for_each_entry(region, &devlink->region_list, list) {
4017 if (idx < start) {
4018 idx++;
4019 continue;
4020 }
4021 err = devlink_nl_region_fill(msg, devlink,
4022 DEVLINK_CMD_REGION_GET,
4023 NETLINK_CB(cb->skb).portid,
4024 cb->nlh->nlmsg_seq,
4025 NLM_F_MULTI, region);
4026 if (err) {
4027 mutex_unlock(&devlink->lock);
4028 goto out;
4029 }
4030 idx++;
4031 }
4032 mutex_unlock(&devlink->lock);
4033 }
4034 out:
4035 mutex_unlock(&devlink_mutex);
4036 cb->args[0] = idx;
4037 return msg->len;
4038 }
4039
4040 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
4041 struct genl_info *info)
4042 {
4043 struct devlink *devlink = info->user_ptr[0];
4044 struct devlink_snapshot *snapshot;
4045 struct devlink_region *region;
4046 const char *region_name;
4047 u32 snapshot_id;
4048
4049 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
4050 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
4051 return -EINVAL;
4052
4053 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4054 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4055
4056 region = devlink_region_get_by_name(devlink, region_name);
4057 if (!region)
4058 return -EINVAL;
4059
4060 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4061 if (!snapshot)
4062 return -EINVAL;
4063
4064 devlink_region_snapshot_del(region, snapshot);
4065 return 0;
4066 }
4067
4068 static int
4069 devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
4070 {
4071 struct devlink *devlink = info->user_ptr[0];
4072 struct devlink_region *region;
4073 const char *region_name;
4074 u32 snapshot_id;
4075 u8 *data;
4076 int err;
4077
4078 if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) {
4079 NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
4080 return -EINVAL;
4081 }
4082
4083 if (!info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4084 NL_SET_ERR_MSG_MOD(info->extack, "No snapshot id provided");
4085 return -EINVAL;
4086 }
4087
4088 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4089 region = devlink_region_get_by_name(devlink, region_name);
4090 if (!region) {
4091 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
4092 return -EINVAL;
4093 }
4094
4095 if (!region->ops->snapshot) {
4096 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
4097 return -EOPNOTSUPP;
4098 }
4099
4100 if (region->cur_snapshots == region->max_snapshots) {
4101 NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
4102 return -ENOSPC;
4103 }
4104
4105 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4106
4107 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4108 NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
4109 return -EEXIST;
4110 }
4111
4112 err = __devlink_snapshot_id_insert(devlink, snapshot_id);
4113 if (err)
4114 return err;
4115
4116 err = region->ops->snapshot(devlink, info->extack, &data);
4117 if (err)
4118 goto err_snapshot_capture;
4119
4120 err = __devlink_region_snapshot_create(region, data, snapshot_id);
4121 if (err)
4122 goto err_snapshot_create;
4123
4124 return 0;
4125
4126 err_snapshot_create:
4127 region->ops->destructor(data);
4128 err_snapshot_capture:
4129 __devlink_snapshot_id_decrement(devlink, snapshot_id);
4130 return err;
4131 }
4132
4133 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
4134 struct devlink *devlink,
4135 u8 *chunk, u32 chunk_size,
4136 u64 addr)
4137 {
4138 struct nlattr *chunk_attr;
4139 int err;
4140
4141 chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
4142 if (!chunk_attr)
4143 return -EINVAL;
4144
4145 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
4146 if (err)
4147 goto nla_put_failure;
4148
4149 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
4150 DEVLINK_ATTR_PAD);
4151 if (err)
4152 goto nla_put_failure;
4153
4154 nla_nest_end(msg, chunk_attr);
4155 return 0;
4156
4157 nla_put_failure:
4158 nla_nest_cancel(msg, chunk_attr);
4159 return err;
4160 }
4161
4162 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
4163
4164 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
4165 struct devlink *devlink,
4166 struct devlink_region *region,
4167 struct nlattr **attrs,
4168 u64 start_offset,
4169 u64 end_offset,
4170 bool dump,
4171 u64 *new_offset)
4172 {
4173 struct devlink_snapshot *snapshot;
4174 u64 curr_offset = start_offset;
4175 u32 snapshot_id;
4176 int err = 0;
4177
4178 *new_offset = start_offset;
4179
4180 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4181 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4182 if (!snapshot)
4183 return -EINVAL;
4184
4185 if (end_offset > region->size || dump)
4186 end_offset = region->size;
4187
4188 while (curr_offset < end_offset) {
4189 u32 data_size;
4190 u8 *data;
4191
4192 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
4193 data_size = end_offset - curr_offset;
4194 else
4195 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
4196
4197 data = &snapshot->data[curr_offset];
4198 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
4199 data, data_size,
4200 curr_offset);
4201 if (err)
4202 break;
4203
4204 curr_offset += data_size;
4205 }
4206 *new_offset = curr_offset;
4207
4208 return err;
4209 }
4210
4211 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
4212 struct netlink_callback *cb)
4213 {
4214 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
4215 u64 ret_offset, start_offset, end_offset = 0;
4216 struct nlattr **attrs = info->attrs;
4217 struct devlink_region *region;
4218 struct nlattr *chunks_attr;
4219 const char *region_name;
4220 struct devlink *devlink;
4221 bool dump = true;
4222 void *hdr;
4223 int err;
4224
4225 start_offset = *((u64 *)&cb->args[0]);
4226
4227 mutex_lock(&devlink_mutex);
4228 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4229 if (IS_ERR(devlink)) {
4230 err = PTR_ERR(devlink);
4231 goto out_dev;
4232 }
4233
4234 mutex_lock(&devlink->lock);
4235
4236 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
4237 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4238 err = -EINVAL;
4239 goto out_unlock;
4240 }
4241
4242 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
4243 region = devlink_region_get_by_name(devlink, region_name);
4244 if (!region) {
4245 err = -EINVAL;
4246 goto out_unlock;
4247 }
4248
4249 /* return 0 if there is no further data to read */
4250 if (start_offset >= region->size) {
4251 err = 0;
4252 goto out_unlock;
4253 }
4254
4255 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4256 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
4257 DEVLINK_CMD_REGION_READ);
4258 if (!hdr) {
4259 err = -EMSGSIZE;
4260 goto out_unlock;
4261 }
4262
4263 err = devlink_nl_put_handle(skb, devlink);
4264 if (err)
4265 goto nla_put_failure;
4266
4267 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
4268 if (err)
4269 goto nla_put_failure;
4270
4271 chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
4272 if (!chunks_attr) {
4273 err = -EMSGSIZE;
4274 goto nla_put_failure;
4275 }
4276
4277 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4278 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4279 if (!start_offset)
4280 start_offset =
4281 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4282
4283 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4284 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4285 dump = false;
4286
4287 if (start_offset == end_offset) {
4288 err = 0;
4289 goto nla_put_failure;
4290 }
4291 }
4292
4293 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4294 region, attrs,
4295 start_offset,
4296 end_offset, dump,
4297 &ret_offset);
4298
4299 if (err && err != -EMSGSIZE)
4300 goto nla_put_failure;
4301
4302 /* Check if there was any progress done to prevent infinite loop */
4303 if (ret_offset == start_offset) {
4304 err = -EINVAL;
4305 goto nla_put_failure;
4306 }
4307
4308 *((u64 *)&cb->args[0]) = ret_offset;
4309
4310 nla_nest_end(skb, chunks_attr);
4311 genlmsg_end(skb, hdr);
4312 mutex_unlock(&devlink->lock);
4313 mutex_unlock(&devlink_mutex);
4314
4315 return skb->len;
4316
4317 nla_put_failure:
4318 genlmsg_cancel(skb, hdr);
4319 out_unlock:
4320 mutex_unlock(&devlink->lock);
4321 out_dev:
4322 mutex_unlock(&devlink_mutex);
4323 return err;
4324 }
4325
4326 struct devlink_info_req {
4327 struct sk_buff *msg;
4328 };
4329
4330 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4331 {
4332 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4333 }
4334 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4335
4336 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4337 {
4338 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4339 }
4340 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4341
4342 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4343 const char *version_name,
4344 const char *version_value)
4345 {
4346 struct nlattr *nest;
4347 int err;
4348
4349 nest = nla_nest_start_noflag(req->msg, attr);
4350 if (!nest)
4351 return -EMSGSIZE;
4352
4353 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4354 version_name);
4355 if (err)
4356 goto nla_put_failure;
4357
4358 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4359 version_value);
4360 if (err)
4361 goto nla_put_failure;
4362
4363 nla_nest_end(req->msg, nest);
4364
4365 return 0;
4366
4367 nla_put_failure:
4368 nla_nest_cancel(req->msg, nest);
4369 return err;
4370 }
4371
4372 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4373 const char *version_name,
4374 const char *version_value)
4375 {
4376 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4377 version_name, version_value);
4378 }
4379 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4380
4381 int devlink_info_version_stored_put(struct devlink_info_req *req,
4382 const char *version_name,
4383 const char *version_value)
4384 {
4385 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4386 version_name, version_value);
4387 }
4388 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4389
4390 int devlink_info_version_running_put(struct devlink_info_req *req,
4391 const char *version_name,
4392 const char *version_value)
4393 {
4394 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4395 version_name, version_value);
4396 }
4397 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4398
4399 static int
4400 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4401 enum devlink_command cmd, u32 portid,
4402 u32 seq, int flags, struct netlink_ext_ack *extack)
4403 {
4404 struct devlink_info_req req;
4405 void *hdr;
4406 int err;
4407
4408 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4409 if (!hdr)
4410 return -EMSGSIZE;
4411
4412 err = -EMSGSIZE;
4413 if (devlink_nl_put_handle(msg, devlink))
4414 goto err_cancel_msg;
4415
4416 req.msg = msg;
4417 err = devlink->ops->info_get(devlink, &req, extack);
4418 if (err)
4419 goto err_cancel_msg;
4420
4421 genlmsg_end(msg, hdr);
4422 return 0;
4423
4424 err_cancel_msg:
4425 genlmsg_cancel(msg, hdr);
4426 return err;
4427 }
4428
4429 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4430 struct genl_info *info)
4431 {
4432 struct devlink *devlink = info->user_ptr[0];
4433 struct sk_buff *msg;
4434 int err;
4435
4436 if (!devlink->ops->info_get)
4437 return -EOPNOTSUPP;
4438
4439 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4440 if (!msg)
4441 return -ENOMEM;
4442
4443 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4444 info->snd_portid, info->snd_seq, 0,
4445 info->extack);
4446 if (err) {
4447 nlmsg_free(msg);
4448 return err;
4449 }
4450
4451 return genlmsg_reply(msg, info);
4452 }
4453
4454 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4455 struct netlink_callback *cb)
4456 {
4457 struct devlink *devlink;
4458 int start = cb->args[0];
4459 int idx = 0;
4460 int err = 0;
4461
4462 mutex_lock(&devlink_mutex);
4463 list_for_each_entry(devlink, &devlink_list, list) {
4464 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4465 continue;
4466 if (idx < start) {
4467 idx++;
4468 continue;
4469 }
4470
4471 if (!devlink->ops->info_get) {
4472 idx++;
4473 continue;
4474 }
4475
4476 mutex_lock(&devlink->lock);
4477 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4478 NETLINK_CB(cb->skb).portid,
4479 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4480 cb->extack);
4481 mutex_unlock(&devlink->lock);
4482 if (err && err != -EOPNOTSUPP)
4483 break;
4484 idx++;
4485 }
4486 mutex_unlock(&devlink_mutex);
4487
4488 if (err != -EMSGSIZE)
4489 return err;
4490
4491 cb->args[0] = idx;
4492 return msg->len;
4493 }
4494
4495 struct devlink_fmsg_item {
4496 struct list_head list;
4497 int attrtype;
4498 u8 nla_type;
4499 u16 len;
4500 int value[];
4501 };
4502
4503 struct devlink_fmsg {
4504 struct list_head item_list;
4505 bool putting_binary; /* This flag forces enclosing of binary data
4506 * in an array brackets. It forces using
4507 * of designated API:
4508 * devlink_fmsg_binary_pair_nest_start()
4509 * devlink_fmsg_binary_pair_nest_end()
4510 */
4511 };
4512
4513 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4514 {
4515 struct devlink_fmsg *fmsg;
4516
4517 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4518 if (!fmsg)
4519 return NULL;
4520
4521 INIT_LIST_HEAD(&fmsg->item_list);
4522
4523 return fmsg;
4524 }
4525
4526 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4527 {
4528 struct devlink_fmsg_item *item, *tmp;
4529
4530 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4531 list_del(&item->list);
4532 kfree(item);
4533 }
4534 kfree(fmsg);
4535 }
4536
4537 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4538 int attrtype)
4539 {
4540 struct devlink_fmsg_item *item;
4541
4542 item = kzalloc(sizeof(*item), GFP_KERNEL);
4543 if (!item)
4544 return -ENOMEM;
4545
4546 item->attrtype = attrtype;
4547 list_add_tail(&item->list, &fmsg->item_list);
4548
4549 return 0;
4550 }
4551
4552 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4553 {
4554 if (fmsg->putting_binary)
4555 return -EINVAL;
4556
4557 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4558 }
4559 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4560
4561 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4562 {
4563 if (fmsg->putting_binary)
4564 return -EINVAL;
4565
4566 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4567 }
4568
4569 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4570 {
4571 if (fmsg->putting_binary)
4572 return -EINVAL;
4573
4574 return devlink_fmsg_nest_end(fmsg);
4575 }
4576 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4577
4578 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4579
4580 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4581 {
4582 struct devlink_fmsg_item *item;
4583
4584 if (fmsg->putting_binary)
4585 return -EINVAL;
4586
4587 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4588 return -EMSGSIZE;
4589
4590 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4591 if (!item)
4592 return -ENOMEM;
4593
4594 item->nla_type = NLA_NUL_STRING;
4595 item->len = strlen(name) + 1;
4596 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4597 memcpy(&item->value, name, item->len);
4598 list_add_tail(&item->list, &fmsg->item_list);
4599
4600 return 0;
4601 }
4602
4603 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4604 {
4605 int err;
4606
4607 if (fmsg->putting_binary)
4608 return -EINVAL;
4609
4610 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4611 if (err)
4612 return err;
4613
4614 err = devlink_fmsg_put_name(fmsg, name);
4615 if (err)
4616 return err;
4617
4618 return 0;
4619 }
4620 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4621
4622 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4623 {
4624 if (fmsg->putting_binary)
4625 return -EINVAL;
4626
4627 return devlink_fmsg_nest_end(fmsg);
4628 }
4629 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4630
4631 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4632 const char *name)
4633 {
4634 int err;
4635
4636 if (fmsg->putting_binary)
4637 return -EINVAL;
4638
4639 err = devlink_fmsg_pair_nest_start(fmsg, name);
4640 if (err)
4641 return err;
4642
4643 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4644 if (err)
4645 return err;
4646
4647 return 0;
4648 }
4649 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4650
4651 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4652 {
4653 int err;
4654
4655 if (fmsg->putting_binary)
4656 return -EINVAL;
4657
4658 err = devlink_fmsg_nest_end(fmsg);
4659 if (err)
4660 return err;
4661
4662 err = devlink_fmsg_nest_end(fmsg);
4663 if (err)
4664 return err;
4665
4666 return 0;
4667 }
4668 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4669
4670 int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
4671 const char *name)
4672 {
4673 int err;
4674
4675 err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4676 if (err)
4677 return err;
4678
4679 fmsg->putting_binary = true;
4680 return err;
4681 }
4682 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
4683
4684 int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
4685 {
4686 if (!fmsg->putting_binary)
4687 return -EINVAL;
4688
4689 fmsg->putting_binary = false;
4690 return devlink_fmsg_arr_pair_nest_end(fmsg);
4691 }
4692 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
4693
4694 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4695 const void *value, u16 value_len,
4696 u8 value_nla_type)
4697 {
4698 struct devlink_fmsg_item *item;
4699
4700 if (value_len > DEVLINK_FMSG_MAX_SIZE)
4701 return -EMSGSIZE;
4702
4703 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4704 if (!item)
4705 return -ENOMEM;
4706
4707 item->nla_type = value_nla_type;
4708 item->len = value_len;
4709 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4710 memcpy(&item->value, value, item->len);
4711 list_add_tail(&item->list, &fmsg->item_list);
4712
4713 return 0;
4714 }
4715
4716 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4717 {
4718 if (fmsg->putting_binary)
4719 return -EINVAL;
4720
4721 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4722 }
4723 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4724
4725 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4726 {
4727 if (fmsg->putting_binary)
4728 return -EINVAL;
4729
4730 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4731 }
4732 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4733
4734 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4735 {
4736 if (fmsg->putting_binary)
4737 return -EINVAL;
4738
4739 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4740 }
4741 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4742
4743 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4744 {
4745 if (fmsg->putting_binary)
4746 return -EINVAL;
4747
4748 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4749 }
4750 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4751
4752 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4753 {
4754 if (fmsg->putting_binary)
4755 return -EINVAL;
4756
4757 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4758 NLA_NUL_STRING);
4759 }
4760 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4761
4762 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4763 u16 value_len)
4764 {
4765 if (!fmsg->putting_binary)
4766 return -EINVAL;
4767
4768 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4769 }
4770 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4771
4772 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4773 bool value)
4774 {
4775 int err;
4776
4777 err = devlink_fmsg_pair_nest_start(fmsg, name);
4778 if (err)
4779 return err;
4780
4781 err = devlink_fmsg_bool_put(fmsg, value);
4782 if (err)
4783 return err;
4784
4785 err = devlink_fmsg_pair_nest_end(fmsg);
4786 if (err)
4787 return err;
4788
4789 return 0;
4790 }
4791 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4792
4793 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4794 u8 value)
4795 {
4796 int err;
4797
4798 err = devlink_fmsg_pair_nest_start(fmsg, name);
4799 if (err)
4800 return err;
4801
4802 err = devlink_fmsg_u8_put(fmsg, value);
4803 if (err)
4804 return err;
4805
4806 err = devlink_fmsg_pair_nest_end(fmsg);
4807 if (err)
4808 return err;
4809
4810 return 0;
4811 }
4812 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4813
4814 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4815 u32 value)
4816 {
4817 int err;
4818
4819 err = devlink_fmsg_pair_nest_start(fmsg, name);
4820 if (err)
4821 return err;
4822
4823 err = devlink_fmsg_u32_put(fmsg, value);
4824 if (err)
4825 return err;
4826
4827 err = devlink_fmsg_pair_nest_end(fmsg);
4828 if (err)
4829 return err;
4830
4831 return 0;
4832 }
4833 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4834
4835 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4836 u64 value)
4837 {
4838 int err;
4839
4840 err = devlink_fmsg_pair_nest_start(fmsg, name);
4841 if (err)
4842 return err;
4843
4844 err = devlink_fmsg_u64_put(fmsg, value);
4845 if (err)
4846 return err;
4847
4848 err = devlink_fmsg_pair_nest_end(fmsg);
4849 if (err)
4850 return err;
4851
4852 return 0;
4853 }
4854 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4855
4856 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4857 const char *value)
4858 {
4859 int err;
4860
4861 err = devlink_fmsg_pair_nest_start(fmsg, name);
4862 if (err)
4863 return err;
4864
4865 err = devlink_fmsg_string_put(fmsg, value);
4866 if (err)
4867 return err;
4868
4869 err = devlink_fmsg_pair_nest_end(fmsg);
4870 if (err)
4871 return err;
4872
4873 return 0;
4874 }
4875 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4876
4877 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4878 const void *value, u32 value_len)
4879 {
4880 u32 data_size;
4881 int end_err;
4882 u32 offset;
4883 int err;
4884
4885 err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
4886 if (err)
4887 return err;
4888
4889 for (offset = 0; offset < value_len; offset += data_size) {
4890 data_size = value_len - offset;
4891 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4892 data_size = DEVLINK_FMSG_MAX_SIZE;
4893 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4894 if (err)
4895 break;
4896 /* Exit from loop with a break (instead of
4897 * return) to make sure putting_binary is turned off in
4898 * devlink_fmsg_binary_pair_nest_end
4899 */
4900 }
4901
4902 end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
4903 if (end_err)
4904 err = end_err;
4905
4906 return err;
4907 }
4908 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4909
4910 static int
4911 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4912 {
4913 switch (msg->nla_type) {
4914 case NLA_FLAG:
4915 case NLA_U8:
4916 case NLA_U32:
4917 case NLA_U64:
4918 case NLA_NUL_STRING:
4919 case NLA_BINARY:
4920 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4921 msg->nla_type);
4922 default:
4923 return -EINVAL;
4924 }
4925 }
4926
4927 static int
4928 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4929 {
4930 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4931 u8 tmp;
4932
4933 switch (msg->nla_type) {
4934 case NLA_FLAG:
4935 /* Always provide flag data, regardless of its value */
4936 tmp = *(bool *) msg->value;
4937
4938 return nla_put_u8(skb, attrtype, tmp);
4939 case NLA_U8:
4940 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4941 case NLA_U32:
4942 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4943 case NLA_U64:
4944 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4945 DEVLINK_ATTR_PAD);
4946 case NLA_NUL_STRING:
4947 return nla_put_string(skb, attrtype, (char *) &msg->value);
4948 case NLA_BINARY:
4949 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4950 default:
4951 return -EINVAL;
4952 }
4953 }
4954
4955 static int
4956 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4957 int *start)
4958 {
4959 struct devlink_fmsg_item *item;
4960 struct nlattr *fmsg_nlattr;
4961 int i = 0;
4962 int err;
4963
4964 fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4965 if (!fmsg_nlattr)
4966 return -EMSGSIZE;
4967
4968 list_for_each_entry(item, &fmsg->item_list, list) {
4969 if (i < *start) {
4970 i++;
4971 continue;
4972 }
4973
4974 switch (item->attrtype) {
4975 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4976 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4977 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4978 case DEVLINK_ATTR_FMSG_NEST_END:
4979 err = nla_put_flag(skb, item->attrtype);
4980 break;
4981 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4982 err = devlink_fmsg_item_fill_type(item, skb);
4983 if (err)
4984 break;
4985 err = devlink_fmsg_item_fill_data(item, skb);
4986 break;
4987 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4988 err = nla_put_string(skb, item->attrtype,
4989 (char *) &item->value);
4990 break;
4991 default:
4992 err = -EINVAL;
4993 break;
4994 }
4995 if (!err)
4996 *start = ++i;
4997 else
4998 break;
4999 }
5000
5001 nla_nest_end(skb, fmsg_nlattr);
5002 return err;
5003 }
5004
5005 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
5006 struct genl_info *info,
5007 enum devlink_command cmd, int flags)
5008 {
5009 struct nlmsghdr *nlh;
5010 struct sk_buff *skb;
5011 bool last = false;
5012 int index = 0;
5013 void *hdr;
5014 int err;
5015
5016 while (!last) {
5017 int tmp_index = index;
5018
5019 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5020 if (!skb)
5021 return -ENOMEM;
5022
5023 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
5024 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
5025 if (!hdr) {
5026 err = -EMSGSIZE;
5027 goto nla_put_failure;
5028 }
5029
5030 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5031 if (!err)
5032 last = true;
5033 else if (err != -EMSGSIZE || tmp_index == index)
5034 goto nla_put_failure;
5035
5036 genlmsg_end(skb, hdr);
5037 err = genlmsg_reply(skb, info);
5038 if (err)
5039 return err;
5040 }
5041
5042 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5043 if (!skb)
5044 return -ENOMEM;
5045 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
5046 NLMSG_DONE, 0, flags | NLM_F_MULTI);
5047 if (!nlh) {
5048 err = -EMSGSIZE;
5049 goto nla_put_failure;
5050 }
5051
5052 return genlmsg_reply(skb, info);
5053
5054 nla_put_failure:
5055 nlmsg_free(skb);
5056 return err;
5057 }
5058
5059 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5060 struct netlink_callback *cb,
5061 enum devlink_command cmd)
5062 {
5063 int index = cb->args[0];
5064 int tmp_index = index;
5065 void *hdr;
5066 int err;
5067
5068 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
5069 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
5070 if (!hdr) {
5071 err = -EMSGSIZE;
5072 goto nla_put_failure;
5073 }
5074
5075 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5076 if ((err && err != -EMSGSIZE) || tmp_index == index)
5077 goto nla_put_failure;
5078
5079 cb->args[0] = index;
5080 genlmsg_end(skb, hdr);
5081 return skb->len;
5082
5083 nla_put_failure:
5084 genlmsg_cancel(skb, hdr);
5085 return err;
5086 }
5087
5088 struct devlink_health_reporter {
5089 struct list_head list;
5090 void *priv;
5091 const struct devlink_health_reporter_ops *ops;
5092 struct devlink *devlink;
5093 struct devlink_fmsg *dump_fmsg;
5094 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
5095 u64 graceful_period;
5096 bool auto_recover;
5097 bool auto_dump;
5098 u8 health_state;
5099 u64 dump_ts;
5100 u64 dump_real_ts;
5101 u64 error_count;
5102 u64 recovery_count;
5103 u64 last_recovery_ts;
5104 refcount_t refcount;
5105 };
5106
5107 void *
5108 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
5109 {
5110 return reporter->priv;
5111 }
5112 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
5113
5114 static struct devlink_health_reporter *
5115 devlink_health_reporter_find_by_name(struct devlink *devlink,
5116 const char *reporter_name)
5117 {
5118 struct devlink_health_reporter *reporter;
5119
5120 lockdep_assert_held(&devlink->reporters_lock);
5121 list_for_each_entry(reporter, &devlink->reporter_list, list)
5122 if (!strcmp(reporter->ops->name, reporter_name))
5123 return reporter;
5124 return NULL;
5125 }
5126
5127 /**
5128 * devlink_health_reporter_create - create devlink health reporter
5129 *
5130 * @devlink: devlink
5131 * @ops: ops
5132 * @graceful_period: to avoid recovery loops, in msecs
5133 * @priv: priv
5134 */
5135 struct devlink_health_reporter *
5136 devlink_health_reporter_create(struct devlink *devlink,
5137 const struct devlink_health_reporter_ops *ops,
5138 u64 graceful_period, void *priv)
5139 {
5140 struct devlink_health_reporter *reporter;
5141
5142 mutex_lock(&devlink->reporters_lock);
5143 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
5144 reporter = ERR_PTR(-EEXIST);
5145 goto unlock;
5146 }
5147
5148 if (WARN_ON(graceful_period && !ops->recover)) {
5149 reporter = ERR_PTR(-EINVAL);
5150 goto unlock;
5151 }
5152
5153 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
5154 if (!reporter) {
5155 reporter = ERR_PTR(-ENOMEM);
5156 goto unlock;
5157 }
5158
5159 reporter->priv = priv;
5160 reporter->ops = ops;
5161 reporter->devlink = devlink;
5162 reporter->graceful_period = graceful_period;
5163 reporter->auto_recover = !!ops->recover;
5164 reporter->auto_dump = !!ops->dump;
5165 mutex_init(&reporter->dump_lock);
5166 refcount_set(&reporter->refcount, 1);
5167 list_add_tail(&reporter->list, &devlink->reporter_list);
5168 unlock:
5169 mutex_unlock(&devlink->reporters_lock);
5170 return reporter;
5171 }
5172 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
5173
5174 /**
5175 * devlink_health_reporter_destroy - destroy devlink health reporter
5176 *
5177 * @reporter: devlink health reporter to destroy
5178 */
5179 void
5180 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5181 {
5182 mutex_lock(&reporter->devlink->reporters_lock);
5183 list_del(&reporter->list);
5184 mutex_unlock(&reporter->devlink->reporters_lock);
5185 while (refcount_read(&reporter->refcount) > 1)
5186 msleep(100);
5187 mutex_destroy(&reporter->dump_lock);
5188 if (reporter->dump_fmsg)
5189 devlink_fmsg_free(reporter->dump_fmsg);
5190 kfree(reporter);
5191 }
5192 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
5193
5194 static int
5195 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5196 struct devlink *devlink,
5197 struct devlink_health_reporter *reporter,
5198 enum devlink_command cmd, u32 portid,
5199 u32 seq, int flags)
5200 {
5201 struct nlattr *reporter_attr;
5202 void *hdr;
5203
5204 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5205 if (!hdr)
5206 return -EMSGSIZE;
5207
5208 if (devlink_nl_put_handle(msg, devlink))
5209 goto genlmsg_cancel;
5210
5211 reporter_attr = nla_nest_start_noflag(msg,
5212 DEVLINK_ATTR_HEALTH_REPORTER);
5213 if (!reporter_attr)
5214 goto genlmsg_cancel;
5215 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5216 reporter->ops->name))
5217 goto reporter_nest_cancel;
5218 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5219 reporter->health_state))
5220 goto reporter_nest_cancel;
5221 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5222 reporter->error_count, DEVLINK_ATTR_PAD))
5223 goto reporter_nest_cancel;
5224 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5225 reporter->recovery_count, DEVLINK_ATTR_PAD))
5226 goto reporter_nest_cancel;
5227 if (reporter->ops->recover &&
5228 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5229 reporter->graceful_period,
5230 DEVLINK_ATTR_PAD))
5231 goto reporter_nest_cancel;
5232 if (reporter->ops->recover &&
5233 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5234 reporter->auto_recover))
5235 goto reporter_nest_cancel;
5236 if (reporter->dump_fmsg &&
5237 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5238 jiffies_to_msecs(reporter->dump_ts),
5239 DEVLINK_ATTR_PAD))
5240 goto reporter_nest_cancel;
5241 if (reporter->dump_fmsg &&
5242 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
5243 reporter->dump_real_ts, DEVLINK_ATTR_PAD))
5244 goto reporter_nest_cancel;
5245 if (reporter->ops->dump &&
5246 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
5247 reporter->auto_dump))
5248 goto reporter_nest_cancel;
5249
5250 nla_nest_end(msg, reporter_attr);
5251 genlmsg_end(msg, hdr);
5252 return 0;
5253
5254 reporter_nest_cancel:
5255 nla_nest_end(msg, reporter_attr);
5256 genlmsg_cancel:
5257 genlmsg_cancel(msg, hdr);
5258 return -EMSGSIZE;
5259 }
5260
5261 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
5262 enum devlink_command cmd)
5263 {
5264 struct sk_buff *msg;
5265 int err;
5266
5267 WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5268
5269 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5270 if (!msg)
5271 return;
5272
5273 err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
5274 reporter, cmd, 0, 0, 0);
5275 if (err) {
5276 nlmsg_free(msg);
5277 return;
5278 }
5279
5280 genlmsg_multicast_netns(&devlink_nl_family,
5281 devlink_net(reporter->devlink),
5282 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
5283 }
5284
5285 void
5286 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
5287 {
5288 reporter->recovery_count++;
5289 reporter->last_recovery_ts = jiffies;
5290 }
5291 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
5292
5293 static int
5294 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
5295 void *priv_ctx, struct netlink_ext_ack *extack)
5296 {
5297 int err;
5298
5299 if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
5300 return 0;
5301
5302 if (!reporter->ops->recover)
5303 return -EOPNOTSUPP;
5304
5305 err = reporter->ops->recover(reporter, priv_ctx, extack);
5306 if (err)
5307 return err;
5308
5309 devlink_health_reporter_recovery_done(reporter);
5310 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
5311 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5312
5313 return 0;
5314 }
5315
5316 static void
5317 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
5318 {
5319 if (!reporter->dump_fmsg)
5320 return;
5321 devlink_fmsg_free(reporter->dump_fmsg);
5322 reporter->dump_fmsg = NULL;
5323 }
5324
5325 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
5326 void *priv_ctx,
5327 struct netlink_ext_ack *extack)
5328 {
5329 int err;
5330
5331 if (!reporter->ops->dump)
5332 return 0;
5333
5334 if (reporter->dump_fmsg)
5335 return 0;
5336
5337 reporter->dump_fmsg = devlink_fmsg_alloc();
5338 if (!reporter->dump_fmsg) {
5339 err = -ENOMEM;
5340 return err;
5341 }
5342
5343 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
5344 if (err)
5345 goto dump_err;
5346
5347 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
5348 priv_ctx, extack);
5349 if (err)
5350 goto dump_err;
5351
5352 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
5353 if (err)
5354 goto dump_err;
5355
5356 reporter->dump_ts = jiffies;
5357 reporter->dump_real_ts = ktime_get_real_ns();
5358
5359 return 0;
5360
5361 dump_err:
5362 devlink_health_dump_clear(reporter);
5363 return err;
5364 }
5365
5366 int devlink_health_report(struct devlink_health_reporter *reporter,
5367 const char *msg, void *priv_ctx)
5368 {
5369 enum devlink_health_reporter_state prev_health_state;
5370 struct devlink *devlink = reporter->devlink;
5371 unsigned long recover_ts_threshold;
5372
5373 /* write a log message of the current error */
5374 WARN_ON(!msg);
5375 trace_devlink_health_report(devlink, reporter->ops->name, msg);
5376 reporter->error_count++;
5377 prev_health_state = reporter->health_state;
5378 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5379 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5380
5381 /* abort if the previous error wasn't recovered */
5382 recover_ts_threshold = reporter->last_recovery_ts +
5383 msecs_to_jiffies(reporter->graceful_period);
5384 if (reporter->auto_recover &&
5385 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
5386 (reporter->last_recovery_ts && reporter->recovery_count &&
5387 time_is_after_jiffies(recover_ts_threshold)))) {
5388 trace_devlink_health_recover_aborted(devlink,
5389 reporter->ops->name,
5390 reporter->health_state,
5391 jiffies -
5392 reporter->last_recovery_ts);
5393 return -ECANCELED;
5394 }
5395
5396 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5397
5398 if (reporter->auto_dump) {
5399 mutex_lock(&reporter->dump_lock);
5400 /* store current dump of current error, for later analysis */
5401 devlink_health_do_dump(reporter, priv_ctx, NULL);
5402 mutex_unlock(&reporter->dump_lock);
5403 }
5404
5405 if (reporter->auto_recover)
5406 return devlink_health_reporter_recover(reporter,
5407 priv_ctx, NULL);
5408
5409 return 0;
5410 }
5411 EXPORT_SYMBOL_GPL(devlink_health_report);
5412
5413 static struct devlink_health_reporter *
5414 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
5415 struct nlattr **attrs)
5416 {
5417 struct devlink_health_reporter *reporter;
5418 char *reporter_name;
5419
5420 if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
5421 return NULL;
5422
5423 reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
5424 mutex_lock(&devlink->reporters_lock);
5425 reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
5426 if (reporter)
5427 refcount_inc(&reporter->refcount);
5428 mutex_unlock(&devlink->reporters_lock);
5429 return reporter;
5430 }
5431
5432 static struct devlink_health_reporter *
5433 devlink_health_reporter_get_from_info(struct devlink *devlink,
5434 struct genl_info *info)
5435 {
5436 return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
5437 }
5438
5439 static struct devlink_health_reporter *
5440 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
5441 {
5442 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5443 struct devlink_health_reporter *reporter;
5444 struct nlattr **attrs = info->attrs;
5445 struct devlink *devlink;
5446
5447 mutex_lock(&devlink_mutex);
5448 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5449 if (IS_ERR(devlink))
5450 goto unlock;
5451
5452 reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5453 mutex_unlock(&devlink_mutex);
5454 return reporter;
5455 unlock:
5456 mutex_unlock(&devlink_mutex);
5457 return NULL;
5458 }
5459
5460 static void
5461 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5462 {
5463 refcount_dec(&reporter->refcount);
5464 }
5465
5466 void
5467 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
5468 enum devlink_health_reporter_state state)
5469 {
5470 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
5471 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
5472 return;
5473
5474 if (reporter->health_state == state)
5475 return;
5476
5477 reporter->health_state = state;
5478 trace_devlink_health_reporter_state_update(reporter->devlink,
5479 reporter->ops->name, state);
5480 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5481 }
5482 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
5483
5484 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5485 struct genl_info *info)
5486 {
5487 struct devlink *devlink = info->user_ptr[0];
5488 struct devlink_health_reporter *reporter;
5489 struct sk_buff *msg;
5490 int err;
5491
5492 reporter = devlink_health_reporter_get_from_info(devlink, info);
5493 if (!reporter)
5494 return -EINVAL;
5495
5496 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5497 if (!msg) {
5498 err = -ENOMEM;
5499 goto out;
5500 }
5501
5502 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5503 DEVLINK_CMD_HEALTH_REPORTER_GET,
5504 info->snd_portid, info->snd_seq,
5505 0);
5506 if (err) {
5507 nlmsg_free(msg);
5508 goto out;
5509 }
5510
5511 err = genlmsg_reply(msg, info);
5512 out:
5513 devlink_health_reporter_put(reporter);
5514 return err;
5515 }
5516
5517 static int
5518 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5519 struct netlink_callback *cb)
5520 {
5521 struct devlink_health_reporter *reporter;
5522 struct devlink *devlink;
5523 int start = cb->args[0];
5524 int idx = 0;
5525 int err;
5526
5527 mutex_lock(&devlink_mutex);
5528 list_for_each_entry(devlink, &devlink_list, list) {
5529 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5530 continue;
5531 mutex_lock(&devlink->reporters_lock);
5532 list_for_each_entry(reporter, &devlink->reporter_list,
5533 list) {
5534 if (idx < start) {
5535 idx++;
5536 continue;
5537 }
5538 err = devlink_nl_health_reporter_fill(msg, devlink,
5539 reporter,
5540 DEVLINK_CMD_HEALTH_REPORTER_GET,
5541 NETLINK_CB(cb->skb).portid,
5542 cb->nlh->nlmsg_seq,
5543 NLM_F_MULTI);
5544 if (err) {
5545 mutex_unlock(&devlink->reporters_lock);
5546 goto out;
5547 }
5548 idx++;
5549 }
5550 mutex_unlock(&devlink->reporters_lock);
5551 }
5552 out:
5553 mutex_unlock(&devlink_mutex);
5554
5555 cb->args[0] = idx;
5556 return msg->len;
5557 }
5558
5559 static int
5560 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5561 struct genl_info *info)
5562 {
5563 struct devlink *devlink = info->user_ptr[0];
5564 struct devlink_health_reporter *reporter;
5565 int err;
5566
5567 reporter = devlink_health_reporter_get_from_info(devlink, info);
5568 if (!reporter)
5569 return -EINVAL;
5570
5571 if (!reporter->ops->recover &&
5572 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5573 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5574 err = -EOPNOTSUPP;
5575 goto out;
5576 }
5577 if (!reporter->ops->dump &&
5578 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
5579 err = -EOPNOTSUPP;
5580 goto out;
5581 }
5582
5583 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5584 reporter->graceful_period =
5585 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5586
5587 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5588 reporter->auto_recover =
5589 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5590
5591 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
5592 reporter->auto_dump =
5593 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
5594
5595 devlink_health_reporter_put(reporter);
5596 return 0;
5597 out:
5598 devlink_health_reporter_put(reporter);
5599 return err;
5600 }
5601
5602 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5603 struct genl_info *info)
5604 {
5605 struct devlink *devlink = info->user_ptr[0];
5606 struct devlink_health_reporter *reporter;
5607 int err;
5608
5609 reporter = devlink_health_reporter_get_from_info(devlink, info);
5610 if (!reporter)
5611 return -EINVAL;
5612
5613 err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5614
5615 devlink_health_reporter_put(reporter);
5616 return err;
5617 }
5618
5619 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5620 struct genl_info *info)
5621 {
5622 struct devlink *devlink = info->user_ptr[0];
5623 struct devlink_health_reporter *reporter;
5624 struct devlink_fmsg *fmsg;
5625 int err;
5626
5627 reporter = devlink_health_reporter_get_from_info(devlink, info);
5628 if (!reporter)
5629 return -EINVAL;
5630
5631 if (!reporter->ops->diagnose) {
5632 devlink_health_reporter_put(reporter);
5633 return -EOPNOTSUPP;
5634 }
5635
5636 fmsg = devlink_fmsg_alloc();
5637 if (!fmsg) {
5638 devlink_health_reporter_put(reporter);
5639 return -ENOMEM;
5640 }
5641
5642 err = devlink_fmsg_obj_nest_start(fmsg);
5643 if (err)
5644 goto out;
5645
5646 err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5647 if (err)
5648 goto out;
5649
5650 err = devlink_fmsg_obj_nest_end(fmsg);
5651 if (err)
5652 goto out;
5653
5654 err = devlink_fmsg_snd(fmsg, info,
5655 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5656
5657 out:
5658 devlink_fmsg_free(fmsg);
5659 devlink_health_reporter_put(reporter);
5660 return err;
5661 }
5662
5663 static int
5664 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5665 struct netlink_callback *cb)
5666 {
5667 struct devlink_health_reporter *reporter;
5668 u64 start = cb->args[0];
5669 int err;
5670
5671 reporter = devlink_health_reporter_get_from_cb(cb);
5672 if (!reporter)
5673 return -EINVAL;
5674
5675 if (!reporter->ops->dump) {
5676 err = -EOPNOTSUPP;
5677 goto out;
5678 }
5679 mutex_lock(&reporter->dump_lock);
5680 if (!start) {
5681 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5682 if (err)
5683 goto unlock;
5684 cb->args[1] = reporter->dump_ts;
5685 }
5686 if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5687 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5688 err = -EAGAIN;
5689 goto unlock;
5690 }
5691
5692 err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5693 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5694 unlock:
5695 mutex_unlock(&reporter->dump_lock);
5696 out:
5697 devlink_health_reporter_put(reporter);
5698 return err;
5699 }
5700
5701 static int
5702 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5703 struct genl_info *info)
5704 {
5705 struct devlink *devlink = info->user_ptr[0];
5706 struct devlink_health_reporter *reporter;
5707
5708 reporter = devlink_health_reporter_get_from_info(devlink, info);
5709 if (!reporter)
5710 return -EINVAL;
5711
5712 if (!reporter->ops->dump) {
5713 devlink_health_reporter_put(reporter);
5714 return -EOPNOTSUPP;
5715 }
5716
5717 mutex_lock(&reporter->dump_lock);
5718 devlink_health_dump_clear(reporter);
5719 mutex_unlock(&reporter->dump_lock);
5720 devlink_health_reporter_put(reporter);
5721 return 0;
5722 }
5723
5724 struct devlink_stats {
5725 u64 rx_bytes;
5726 u64 rx_packets;
5727 struct u64_stats_sync syncp;
5728 };
5729
5730 /**
5731 * struct devlink_trap_policer_item - Packet trap policer attributes.
5732 * @policer: Immutable packet trap policer attributes.
5733 * @rate: Rate in packets / sec.
5734 * @burst: Burst size in packets.
5735 * @list: trap_policer_list member.
5736 *
5737 * Describes packet trap policer attributes. Created by devlink during trap
5738 * policer registration.
5739 */
5740 struct devlink_trap_policer_item {
5741 const struct devlink_trap_policer *policer;
5742 u64 rate;
5743 u64 burst;
5744 struct list_head list;
5745 };
5746
5747 /**
5748 * struct devlink_trap_group_item - Packet trap group attributes.
5749 * @group: Immutable packet trap group attributes.
5750 * @policer_item: Associated policer item. Can be NULL.
5751 * @list: trap_group_list member.
5752 * @stats: Trap group statistics.
5753 *
5754 * Describes packet trap group attributes. Created by devlink during trap
5755 * group registration.
5756 */
5757 struct devlink_trap_group_item {
5758 const struct devlink_trap_group *group;
5759 struct devlink_trap_policer_item *policer_item;
5760 struct list_head list;
5761 struct devlink_stats __percpu *stats;
5762 };
5763
5764 /**
5765 * struct devlink_trap_item - Packet trap attributes.
5766 * @trap: Immutable packet trap attributes.
5767 * @group_item: Associated group item.
5768 * @list: trap_list member.
5769 * @action: Trap action.
5770 * @stats: Trap statistics.
5771 * @priv: Driver private information.
5772 *
5773 * Describes both mutable and immutable packet trap attributes. Created by
5774 * devlink during trap registration and used for all trap related operations.
5775 */
5776 struct devlink_trap_item {
5777 const struct devlink_trap *trap;
5778 struct devlink_trap_group_item *group_item;
5779 struct list_head list;
5780 enum devlink_trap_action action;
5781 struct devlink_stats __percpu *stats;
5782 void *priv;
5783 };
5784
5785 static struct devlink_trap_policer_item *
5786 devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
5787 {
5788 struct devlink_trap_policer_item *policer_item;
5789
5790 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
5791 if (policer_item->policer->id == id)
5792 return policer_item;
5793 }
5794
5795 return NULL;
5796 }
5797
5798 static struct devlink_trap_item *
5799 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5800 {
5801 struct devlink_trap_item *trap_item;
5802
5803 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5804 if (!strcmp(trap_item->trap->name, name))
5805 return trap_item;
5806 }
5807
5808 return NULL;
5809 }
5810
5811 static struct devlink_trap_item *
5812 devlink_trap_item_get_from_info(struct devlink *devlink,
5813 struct genl_info *info)
5814 {
5815 struct nlattr *attr;
5816
5817 if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5818 return NULL;
5819 attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5820
5821 return devlink_trap_item_lookup(devlink, nla_data(attr));
5822 }
5823
5824 static int
5825 devlink_trap_action_get_from_info(struct genl_info *info,
5826 enum devlink_trap_action *p_trap_action)
5827 {
5828 u8 val;
5829
5830 val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5831 switch (val) {
5832 case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5833 case DEVLINK_TRAP_ACTION_TRAP:
5834 *p_trap_action = val;
5835 break;
5836 default:
5837 return -EINVAL;
5838 }
5839
5840 return 0;
5841 }
5842
5843 static int devlink_trap_metadata_put(struct sk_buff *msg,
5844 const struct devlink_trap *trap)
5845 {
5846 struct nlattr *attr;
5847
5848 attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5849 if (!attr)
5850 return -EMSGSIZE;
5851
5852 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5853 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5854 goto nla_put_failure;
5855 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
5856 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
5857 goto nla_put_failure;
5858
5859 nla_nest_end(msg, attr);
5860
5861 return 0;
5862
5863 nla_put_failure:
5864 nla_nest_cancel(msg, attr);
5865 return -EMSGSIZE;
5866 }
5867
5868 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5869 struct devlink_stats *stats)
5870 {
5871 int i;
5872
5873 memset(stats, 0, sizeof(*stats));
5874 for_each_possible_cpu(i) {
5875 struct devlink_stats *cpu_stats;
5876 u64 rx_packets, rx_bytes;
5877 unsigned int start;
5878
5879 cpu_stats = per_cpu_ptr(trap_stats, i);
5880 do {
5881 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5882 rx_packets = cpu_stats->rx_packets;
5883 rx_bytes = cpu_stats->rx_bytes;
5884 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5885
5886 stats->rx_packets += rx_packets;
5887 stats->rx_bytes += rx_bytes;
5888 }
5889 }
5890
5891 static int devlink_trap_stats_put(struct sk_buff *msg,
5892 struct devlink_stats __percpu *trap_stats)
5893 {
5894 struct devlink_stats stats;
5895 struct nlattr *attr;
5896
5897 devlink_trap_stats_read(trap_stats, &stats);
5898
5899 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5900 if (!attr)
5901 return -EMSGSIZE;
5902
5903 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5904 stats.rx_packets, DEVLINK_ATTR_PAD))
5905 goto nla_put_failure;
5906
5907 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5908 stats.rx_bytes, DEVLINK_ATTR_PAD))
5909 goto nla_put_failure;
5910
5911 nla_nest_end(msg, attr);
5912
5913 return 0;
5914
5915 nla_put_failure:
5916 nla_nest_cancel(msg, attr);
5917 return -EMSGSIZE;
5918 }
5919
5920 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5921 const struct devlink_trap_item *trap_item,
5922 enum devlink_command cmd, u32 portid, u32 seq,
5923 int flags)
5924 {
5925 struct devlink_trap_group_item *group_item = trap_item->group_item;
5926 void *hdr;
5927 int err;
5928
5929 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5930 if (!hdr)
5931 return -EMSGSIZE;
5932
5933 if (devlink_nl_put_handle(msg, devlink))
5934 goto nla_put_failure;
5935
5936 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5937 group_item->group->name))
5938 goto nla_put_failure;
5939
5940 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5941 goto nla_put_failure;
5942
5943 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5944 goto nla_put_failure;
5945
5946 if (trap_item->trap->generic &&
5947 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5948 goto nla_put_failure;
5949
5950 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5951 goto nla_put_failure;
5952
5953 err = devlink_trap_metadata_put(msg, trap_item->trap);
5954 if (err)
5955 goto nla_put_failure;
5956
5957 err = devlink_trap_stats_put(msg, trap_item->stats);
5958 if (err)
5959 goto nla_put_failure;
5960
5961 genlmsg_end(msg, hdr);
5962
5963 return 0;
5964
5965 nla_put_failure:
5966 genlmsg_cancel(msg, hdr);
5967 return -EMSGSIZE;
5968 }
5969
5970 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5971 struct genl_info *info)
5972 {
5973 struct netlink_ext_ack *extack = info->extack;
5974 struct devlink *devlink = info->user_ptr[0];
5975 struct devlink_trap_item *trap_item;
5976 struct sk_buff *msg;
5977 int err;
5978
5979 if (list_empty(&devlink->trap_list))
5980 return -EOPNOTSUPP;
5981
5982 trap_item = devlink_trap_item_get_from_info(devlink, info);
5983 if (!trap_item) {
5984 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5985 return -ENOENT;
5986 }
5987
5988 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5989 if (!msg)
5990 return -ENOMEM;
5991
5992 err = devlink_nl_trap_fill(msg, devlink, trap_item,
5993 DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5994 info->snd_seq, 0);
5995 if (err)
5996 goto err_trap_fill;
5997
5998 return genlmsg_reply(msg, info);
5999
6000 err_trap_fill:
6001 nlmsg_free(msg);
6002 return err;
6003 }
6004
6005 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
6006 struct netlink_callback *cb)
6007 {
6008 struct devlink_trap_item *trap_item;
6009 struct devlink *devlink;
6010 int start = cb->args[0];
6011 int idx = 0;
6012 int err;
6013
6014 mutex_lock(&devlink_mutex);
6015 list_for_each_entry(devlink, &devlink_list, list) {
6016 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6017 continue;
6018 mutex_lock(&devlink->lock);
6019 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6020 if (idx < start) {
6021 idx++;
6022 continue;
6023 }
6024 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6025 DEVLINK_CMD_TRAP_NEW,
6026 NETLINK_CB(cb->skb).portid,
6027 cb->nlh->nlmsg_seq,
6028 NLM_F_MULTI);
6029 if (err) {
6030 mutex_unlock(&devlink->lock);
6031 goto out;
6032 }
6033 idx++;
6034 }
6035 mutex_unlock(&devlink->lock);
6036 }
6037 out:
6038 mutex_unlock(&devlink_mutex);
6039
6040 cb->args[0] = idx;
6041 return msg->len;
6042 }
6043
6044 static int __devlink_trap_action_set(struct devlink *devlink,
6045 struct devlink_trap_item *trap_item,
6046 enum devlink_trap_action trap_action,
6047 struct netlink_ext_ack *extack)
6048 {
6049 int err;
6050
6051 if (trap_item->action != trap_action &&
6052 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
6053 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
6054 return 0;
6055 }
6056
6057 err = devlink->ops->trap_action_set(devlink, trap_item->trap,
6058 trap_action);
6059 if (err)
6060 return err;
6061
6062 trap_item->action = trap_action;
6063
6064 return 0;
6065 }
6066
6067 static int devlink_trap_action_set(struct devlink *devlink,
6068 struct devlink_trap_item *trap_item,
6069 struct genl_info *info)
6070 {
6071 enum devlink_trap_action trap_action;
6072 int err;
6073
6074 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6075 return 0;
6076
6077 err = devlink_trap_action_get_from_info(info, &trap_action);
6078 if (err) {
6079 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6080 return -EINVAL;
6081 }
6082
6083 return __devlink_trap_action_set(devlink, trap_item, trap_action,
6084 info->extack);
6085 }
6086
6087 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
6088 struct genl_info *info)
6089 {
6090 struct netlink_ext_ack *extack = info->extack;
6091 struct devlink *devlink = info->user_ptr[0];
6092 struct devlink_trap_item *trap_item;
6093 int err;
6094
6095 if (list_empty(&devlink->trap_list))
6096 return -EOPNOTSUPP;
6097
6098 trap_item = devlink_trap_item_get_from_info(devlink, info);
6099 if (!trap_item) {
6100 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6101 return -ENOENT;
6102 }
6103
6104 err = devlink_trap_action_set(devlink, trap_item, info);
6105 if (err)
6106 return err;
6107
6108 return 0;
6109 }
6110
6111 static struct devlink_trap_group_item *
6112 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
6113 {
6114 struct devlink_trap_group_item *group_item;
6115
6116 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6117 if (!strcmp(group_item->group->name, name))
6118 return group_item;
6119 }
6120
6121 return NULL;
6122 }
6123
6124 static struct devlink_trap_group_item *
6125 devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
6126 {
6127 struct devlink_trap_group_item *group_item;
6128
6129 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6130 if (group_item->group->id == id)
6131 return group_item;
6132 }
6133
6134 return NULL;
6135 }
6136
6137 static struct devlink_trap_group_item *
6138 devlink_trap_group_item_get_from_info(struct devlink *devlink,
6139 struct genl_info *info)
6140 {
6141 char *name;
6142
6143 if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
6144 return NULL;
6145 name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
6146
6147 return devlink_trap_group_item_lookup(devlink, name);
6148 }
6149
6150 static int
6151 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
6152 const struct devlink_trap_group_item *group_item,
6153 enum devlink_command cmd, u32 portid, u32 seq,
6154 int flags)
6155 {
6156 void *hdr;
6157 int err;
6158
6159 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6160 if (!hdr)
6161 return -EMSGSIZE;
6162
6163 if (devlink_nl_put_handle(msg, devlink))
6164 goto nla_put_failure;
6165
6166 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
6167 group_item->group->name))
6168 goto nla_put_failure;
6169
6170 if (group_item->group->generic &&
6171 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
6172 goto nla_put_failure;
6173
6174 if (group_item->policer_item &&
6175 nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6176 group_item->policer_item->policer->id))
6177 goto nla_put_failure;
6178
6179 err = devlink_trap_stats_put(msg, group_item->stats);
6180 if (err)
6181 goto nla_put_failure;
6182
6183 genlmsg_end(msg, hdr);
6184
6185 return 0;
6186
6187 nla_put_failure:
6188 genlmsg_cancel(msg, hdr);
6189 return -EMSGSIZE;
6190 }
6191
6192 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
6193 struct genl_info *info)
6194 {
6195 struct netlink_ext_ack *extack = info->extack;
6196 struct devlink *devlink = info->user_ptr[0];
6197 struct devlink_trap_group_item *group_item;
6198 struct sk_buff *msg;
6199 int err;
6200
6201 if (list_empty(&devlink->trap_group_list))
6202 return -EOPNOTSUPP;
6203
6204 group_item = devlink_trap_group_item_get_from_info(devlink, info);
6205 if (!group_item) {
6206 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6207 return -ENOENT;
6208 }
6209
6210 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6211 if (!msg)
6212 return -ENOMEM;
6213
6214 err = devlink_nl_trap_group_fill(msg, devlink, group_item,
6215 DEVLINK_CMD_TRAP_GROUP_NEW,
6216 info->snd_portid, info->snd_seq, 0);
6217 if (err)
6218 goto err_trap_group_fill;
6219
6220 return genlmsg_reply(msg, info);
6221
6222 err_trap_group_fill:
6223 nlmsg_free(msg);
6224 return err;
6225 }
6226
6227 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
6228 struct netlink_callback *cb)
6229 {
6230 enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
6231 struct devlink_trap_group_item *group_item;
6232 u32 portid = NETLINK_CB(cb->skb).portid;
6233 struct devlink *devlink;
6234 int start = cb->args[0];
6235 int idx = 0;
6236 int err;
6237
6238 mutex_lock(&devlink_mutex);
6239 list_for_each_entry(devlink, &devlink_list, list) {
6240 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6241 continue;
6242 mutex_lock(&devlink->lock);
6243 list_for_each_entry(group_item, &devlink->trap_group_list,
6244 list) {
6245 if (idx < start) {
6246 idx++;
6247 continue;
6248 }
6249 err = devlink_nl_trap_group_fill(msg, devlink,
6250 group_item, cmd,
6251 portid,
6252 cb->nlh->nlmsg_seq,
6253 NLM_F_MULTI);
6254 if (err) {
6255 mutex_unlock(&devlink->lock);
6256 goto out;
6257 }
6258 idx++;
6259 }
6260 mutex_unlock(&devlink->lock);
6261 }
6262 out:
6263 mutex_unlock(&devlink_mutex);
6264
6265 cb->args[0] = idx;
6266 return msg->len;
6267 }
6268
6269 static int
6270 __devlink_trap_group_action_set(struct devlink *devlink,
6271 struct devlink_trap_group_item *group_item,
6272 enum devlink_trap_action trap_action,
6273 struct netlink_ext_ack *extack)
6274 {
6275 const char *group_name = group_item->group->name;
6276 struct devlink_trap_item *trap_item;
6277 int err;
6278
6279 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6280 if (strcmp(trap_item->group_item->group->name, group_name))
6281 continue;
6282 err = __devlink_trap_action_set(devlink, trap_item,
6283 trap_action, extack);
6284 if (err)
6285 return err;
6286 }
6287
6288 return 0;
6289 }
6290
6291 static int
6292 devlink_trap_group_action_set(struct devlink *devlink,
6293 struct devlink_trap_group_item *group_item,
6294 struct genl_info *info, bool *p_modified)
6295 {
6296 enum devlink_trap_action trap_action;
6297 int err;
6298
6299 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6300 return 0;
6301
6302 err = devlink_trap_action_get_from_info(info, &trap_action);
6303 if (err) {
6304 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6305 return -EINVAL;
6306 }
6307
6308 err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
6309 info->extack);
6310 if (err)
6311 return err;
6312
6313 *p_modified = true;
6314
6315 return 0;
6316 }
6317
6318 static int devlink_trap_group_set(struct devlink *devlink,
6319 struct devlink_trap_group_item *group_item,
6320 struct genl_info *info)
6321 {
6322 struct devlink_trap_policer_item *policer_item;
6323 struct netlink_ext_ack *extack = info->extack;
6324 const struct devlink_trap_policer *policer;
6325 struct nlattr **attrs = info->attrs;
6326 int err;
6327
6328 if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6329 return 0;
6330
6331 if (!devlink->ops->trap_group_set)
6332 return -EOPNOTSUPP;
6333
6334 policer_item = group_item->policer_item;
6335 if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) {
6336 u32 policer_id;
6337
6338 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6339 policer_item = devlink_trap_policer_item_lookup(devlink,
6340 policer_id);
6341 if (policer_id && !policer_item) {
6342 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6343 return -ENOENT;
6344 }
6345 }
6346 policer = policer_item ? policer_item->policer : NULL;
6347
6348 err = devlink->ops->trap_group_set(devlink, group_item->group, policer);
6349 if (err)
6350 return err;
6351
6352 group_item->policer_item = policer_item;
6353
6354 return 0;
6355 }
6356
6357 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
6358 struct genl_info *info)
6359 {
6360 struct netlink_ext_ack *extack = info->extack;
6361 struct devlink *devlink = info->user_ptr[0];
6362 struct devlink_trap_group_item *group_item;
6363 bool modified = false;
6364 int err;
6365
6366 if (list_empty(&devlink->trap_group_list))
6367 return -EOPNOTSUPP;
6368
6369 group_item = devlink_trap_group_item_get_from_info(devlink, info);
6370 if (!group_item) {
6371 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6372 return -ENOENT;
6373 }
6374
6375 err = devlink_trap_group_action_set(devlink, group_item, info,
6376 &modified);
6377 if (err)
6378 return err;
6379
6380 err = devlink_trap_group_set(devlink, group_item, info);
6381 if (err)
6382 goto err_trap_group_set;
6383
6384 return 0;
6385
6386 err_trap_group_set:
6387 if (modified)
6388 NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
6389 return err;
6390 }
6391
6392 static struct devlink_trap_policer_item *
6393 devlink_trap_policer_item_get_from_info(struct devlink *devlink,
6394 struct genl_info *info)
6395 {
6396 u32 id;
6397
6398 if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6399 return NULL;
6400 id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6401
6402 return devlink_trap_policer_item_lookup(devlink, id);
6403 }
6404
6405 static int
6406 devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
6407 const struct devlink_trap_policer *policer)
6408 {
6409 struct nlattr *attr;
6410 u64 drops;
6411 int err;
6412
6413 if (!devlink->ops->trap_policer_counter_get)
6414 return 0;
6415
6416 err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
6417 if (err)
6418 return err;
6419
6420 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
6421 if (!attr)
6422 return -EMSGSIZE;
6423
6424 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
6425 DEVLINK_ATTR_PAD))
6426 goto nla_put_failure;
6427
6428 nla_nest_end(msg, attr);
6429
6430 return 0;
6431
6432 nla_put_failure:
6433 nla_nest_cancel(msg, attr);
6434 return -EMSGSIZE;
6435 }
6436
6437 static int
6438 devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
6439 const struct devlink_trap_policer_item *policer_item,
6440 enum devlink_command cmd, u32 portid, u32 seq,
6441 int flags)
6442 {
6443 void *hdr;
6444 int err;
6445
6446 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6447 if (!hdr)
6448 return -EMSGSIZE;
6449
6450 if (devlink_nl_put_handle(msg, devlink))
6451 goto nla_put_failure;
6452
6453 if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6454 policer_item->policer->id))
6455 goto nla_put_failure;
6456
6457 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
6458 policer_item->rate, DEVLINK_ATTR_PAD))
6459 goto nla_put_failure;
6460
6461 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
6462 policer_item->burst, DEVLINK_ATTR_PAD))
6463 goto nla_put_failure;
6464
6465 err = devlink_trap_policer_stats_put(msg, devlink,
6466 policer_item->policer);
6467 if (err)
6468 goto nla_put_failure;
6469
6470 genlmsg_end(msg, hdr);
6471
6472 return 0;
6473
6474 nla_put_failure:
6475 genlmsg_cancel(msg, hdr);
6476 return -EMSGSIZE;
6477 }
6478
6479 static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
6480 struct genl_info *info)
6481 {
6482 struct devlink_trap_policer_item *policer_item;
6483 struct netlink_ext_ack *extack = info->extack;
6484 struct devlink *devlink = info->user_ptr[0];
6485 struct sk_buff *msg;
6486 int err;
6487
6488 if (list_empty(&devlink->trap_policer_list))
6489 return -EOPNOTSUPP;
6490
6491 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6492 if (!policer_item) {
6493 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6494 return -ENOENT;
6495 }
6496
6497 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6498 if (!msg)
6499 return -ENOMEM;
6500
6501 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
6502 DEVLINK_CMD_TRAP_POLICER_NEW,
6503 info->snd_portid, info->snd_seq, 0);
6504 if (err)
6505 goto err_trap_policer_fill;
6506
6507 return genlmsg_reply(msg, info);
6508
6509 err_trap_policer_fill:
6510 nlmsg_free(msg);
6511 return err;
6512 }
6513
6514 static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
6515 struct netlink_callback *cb)
6516 {
6517 enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
6518 struct devlink_trap_policer_item *policer_item;
6519 u32 portid = NETLINK_CB(cb->skb).portid;
6520 struct devlink *devlink;
6521 int start = cb->args[0];
6522 int idx = 0;
6523 int err;
6524
6525 mutex_lock(&devlink_mutex);
6526 list_for_each_entry(devlink, &devlink_list, list) {
6527 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6528 continue;
6529 mutex_lock(&devlink->lock);
6530 list_for_each_entry(policer_item, &devlink->trap_policer_list,
6531 list) {
6532 if (idx < start) {
6533 idx++;
6534 continue;
6535 }
6536 err = devlink_nl_trap_policer_fill(msg, devlink,
6537 policer_item, cmd,
6538 portid,
6539 cb->nlh->nlmsg_seq,
6540 NLM_F_MULTI);
6541 if (err) {
6542 mutex_unlock(&devlink->lock);
6543 goto out;
6544 }
6545 idx++;
6546 }
6547 mutex_unlock(&devlink->lock);
6548 }
6549 out:
6550 mutex_unlock(&devlink_mutex);
6551
6552 cb->args[0] = idx;
6553 return msg->len;
6554 }
6555
6556 static int
6557 devlink_trap_policer_set(struct devlink *devlink,
6558 struct devlink_trap_policer_item *policer_item,
6559 struct genl_info *info)
6560 {
6561 struct netlink_ext_ack *extack = info->extack;
6562 struct nlattr **attrs = info->attrs;
6563 u64 rate, burst;
6564 int err;
6565
6566 rate = policer_item->rate;
6567 burst = policer_item->burst;
6568
6569 if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
6570 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
6571
6572 if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
6573 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
6574
6575 if (rate < policer_item->policer->min_rate) {
6576 NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
6577 return -EINVAL;
6578 }
6579
6580 if (rate > policer_item->policer->max_rate) {
6581 NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
6582 return -EINVAL;
6583 }
6584
6585 if (burst < policer_item->policer->min_burst) {
6586 NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
6587 return -EINVAL;
6588 }
6589
6590 if (burst > policer_item->policer->max_burst) {
6591 NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
6592 return -EINVAL;
6593 }
6594
6595 err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
6596 rate, burst, info->extack);
6597 if (err)
6598 return err;
6599
6600 policer_item->rate = rate;
6601 policer_item->burst = burst;
6602
6603 return 0;
6604 }
6605
6606 static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
6607 struct genl_info *info)
6608 {
6609 struct devlink_trap_policer_item *policer_item;
6610 struct netlink_ext_ack *extack = info->extack;
6611 struct devlink *devlink = info->user_ptr[0];
6612
6613 if (list_empty(&devlink->trap_policer_list))
6614 return -EOPNOTSUPP;
6615
6616 if (!devlink->ops->trap_policer_set)
6617 return -EOPNOTSUPP;
6618
6619 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6620 if (!policer_item) {
6621 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6622 return -ENOENT;
6623 }
6624
6625 return devlink_trap_policer_set(devlink, policer_item, info);
6626 }
6627
6628 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
6629 [DEVLINK_ATTR_UNSPEC] = { .strict_start_type =
6630 DEVLINK_ATTR_TRAP_POLICER_ID },
6631 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
6632 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
6633 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
6634 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
6635 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
6636 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
6637 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
6638 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
6639 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
6640 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
6641 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
6642 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
6643 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
6644 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
6645 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
6646 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
6647 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
6648 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
6649 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
6650 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
6651 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
6652 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
6653 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
6654 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
6655 [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
6656 [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
6657 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
6658 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
6659 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
6660 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
6661 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
6662 [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
6663 [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
6664 [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
6665 [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
6666 [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
6667 [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
6668 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },
6669 [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
6670 [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
6671 [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
6672 };
6673
6674 static const struct genl_ops devlink_nl_ops[] = {
6675 {
6676 .cmd = DEVLINK_CMD_GET,
6677 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6678 .doit = devlink_nl_cmd_get_doit,
6679 .dumpit = devlink_nl_cmd_get_dumpit,
6680 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6681 /* can be retrieved by unprivileged users */
6682 },
6683 {
6684 .cmd = DEVLINK_CMD_PORT_GET,
6685 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6686 .doit = devlink_nl_cmd_port_get_doit,
6687 .dumpit = devlink_nl_cmd_port_get_dumpit,
6688 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6689 /* can be retrieved by unprivileged users */
6690 },
6691 {
6692 .cmd = DEVLINK_CMD_PORT_SET,
6693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6694 .doit = devlink_nl_cmd_port_set_doit,
6695 .flags = GENL_ADMIN_PERM,
6696 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6697 },
6698 {
6699 .cmd = DEVLINK_CMD_PORT_SPLIT,
6700 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6701 .doit = devlink_nl_cmd_port_split_doit,
6702 .flags = GENL_ADMIN_PERM,
6703 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6704 DEVLINK_NL_FLAG_NO_LOCK,
6705 },
6706 {
6707 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
6708 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6709 .doit = devlink_nl_cmd_port_unsplit_doit,
6710 .flags = GENL_ADMIN_PERM,
6711 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6712 DEVLINK_NL_FLAG_NO_LOCK,
6713 },
6714 {
6715 .cmd = DEVLINK_CMD_SB_GET,
6716 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6717 .doit = devlink_nl_cmd_sb_get_doit,
6718 .dumpit = devlink_nl_cmd_sb_get_dumpit,
6719 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6720 DEVLINK_NL_FLAG_NEED_SB,
6721 /* can be retrieved by unprivileged users */
6722 },
6723 {
6724 .cmd = DEVLINK_CMD_SB_POOL_GET,
6725 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6726 .doit = devlink_nl_cmd_sb_pool_get_doit,
6727 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
6728 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6729 DEVLINK_NL_FLAG_NEED_SB,
6730 /* can be retrieved by unprivileged users */
6731 },
6732 {
6733 .cmd = DEVLINK_CMD_SB_POOL_SET,
6734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6735 .doit = devlink_nl_cmd_sb_pool_set_doit,
6736 .flags = GENL_ADMIN_PERM,
6737 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6738 DEVLINK_NL_FLAG_NEED_SB,
6739 },
6740 {
6741 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
6742 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6743 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
6744 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
6745 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6746 DEVLINK_NL_FLAG_NEED_SB,
6747 /* can be retrieved by unprivileged users */
6748 },
6749 {
6750 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
6751 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6752 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
6753 .flags = GENL_ADMIN_PERM,
6754 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6755 DEVLINK_NL_FLAG_NEED_SB,
6756 },
6757 {
6758 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6759 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6760 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6761 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6762 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6763 DEVLINK_NL_FLAG_NEED_SB,
6764 /* can be retrieved by unprivileged users */
6765 },
6766 {
6767 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6768 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6769 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6770 .flags = GENL_ADMIN_PERM,
6771 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6772 DEVLINK_NL_FLAG_NEED_SB,
6773 },
6774 {
6775 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6776 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6777 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6778 .flags = GENL_ADMIN_PERM,
6779 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6780 DEVLINK_NL_FLAG_NEED_SB,
6781 },
6782 {
6783 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6784 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6785 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6786 .flags = GENL_ADMIN_PERM,
6787 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6788 DEVLINK_NL_FLAG_NEED_SB,
6789 },
6790 {
6791 .cmd = DEVLINK_CMD_ESWITCH_GET,
6792 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6793 .doit = devlink_nl_cmd_eswitch_get_doit,
6794 .flags = GENL_ADMIN_PERM,
6795 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6796 DEVLINK_NL_FLAG_NO_LOCK,
6797 },
6798 {
6799 .cmd = DEVLINK_CMD_ESWITCH_SET,
6800 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6801 .doit = devlink_nl_cmd_eswitch_set_doit,
6802 .flags = GENL_ADMIN_PERM,
6803 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6804 DEVLINK_NL_FLAG_NO_LOCK,
6805 },
6806 {
6807 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6808 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6809 .doit = devlink_nl_cmd_dpipe_table_get,
6810 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6811 /* can be retrieved by unprivileged users */
6812 },
6813 {
6814 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6815 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6816 .doit = devlink_nl_cmd_dpipe_entries_get,
6817 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6818 /* can be retrieved by unprivileged users */
6819 },
6820 {
6821 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6822 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6823 .doit = devlink_nl_cmd_dpipe_headers_get,
6824 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6825 /* can be retrieved by unprivileged users */
6826 },
6827 {
6828 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6829 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6830 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6831 .flags = GENL_ADMIN_PERM,
6832 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6833 },
6834 {
6835 .cmd = DEVLINK_CMD_RESOURCE_SET,
6836 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6837 .doit = devlink_nl_cmd_resource_set,
6838 .flags = GENL_ADMIN_PERM,
6839 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6840 },
6841 {
6842 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6843 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6844 .doit = devlink_nl_cmd_resource_dump,
6845 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6846 /* can be retrieved by unprivileged users */
6847 },
6848 {
6849 .cmd = DEVLINK_CMD_RELOAD,
6850 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6851 .doit = devlink_nl_cmd_reload,
6852 .flags = GENL_ADMIN_PERM,
6853 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6854 DEVLINK_NL_FLAG_NO_LOCK,
6855 },
6856 {
6857 .cmd = DEVLINK_CMD_PARAM_GET,
6858 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6859 .doit = devlink_nl_cmd_param_get_doit,
6860 .dumpit = devlink_nl_cmd_param_get_dumpit,
6861 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6862 /* can be retrieved by unprivileged users */
6863 },
6864 {
6865 .cmd = DEVLINK_CMD_PARAM_SET,
6866 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6867 .doit = devlink_nl_cmd_param_set_doit,
6868 .flags = GENL_ADMIN_PERM,
6869 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6870 },
6871 {
6872 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6873 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6874 .doit = devlink_nl_cmd_port_param_get_doit,
6875 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6876 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6877 /* can be retrieved by unprivileged users */
6878 },
6879 {
6880 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6881 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6882 .doit = devlink_nl_cmd_port_param_set_doit,
6883 .flags = GENL_ADMIN_PERM,
6884 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6885 },
6886 {
6887 .cmd = DEVLINK_CMD_REGION_GET,
6888 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6889 .doit = devlink_nl_cmd_region_get_doit,
6890 .dumpit = devlink_nl_cmd_region_get_dumpit,
6891 .flags = GENL_ADMIN_PERM,
6892 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6893 },
6894 {
6895 .cmd = DEVLINK_CMD_REGION_NEW,
6896 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6897 .doit = devlink_nl_cmd_region_new,
6898 .flags = GENL_ADMIN_PERM,
6899 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6900 },
6901 {
6902 .cmd = DEVLINK_CMD_REGION_DEL,
6903 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6904 .doit = devlink_nl_cmd_region_del,
6905 .flags = GENL_ADMIN_PERM,
6906 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6907 },
6908 {
6909 .cmd = DEVLINK_CMD_REGION_READ,
6910 .validate = GENL_DONT_VALIDATE_STRICT |
6911 GENL_DONT_VALIDATE_DUMP_STRICT,
6912 .dumpit = devlink_nl_cmd_region_read_dumpit,
6913 .flags = GENL_ADMIN_PERM,
6914 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6915 },
6916 {
6917 .cmd = DEVLINK_CMD_INFO_GET,
6918 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6919 .doit = devlink_nl_cmd_info_get_doit,
6920 .dumpit = devlink_nl_cmd_info_get_dumpit,
6921 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6922 /* can be retrieved by unprivileged users */
6923 },
6924 {
6925 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6926 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6927 .doit = devlink_nl_cmd_health_reporter_get_doit,
6928 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6929 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6930 DEVLINK_NL_FLAG_NO_LOCK,
6931 /* can be retrieved by unprivileged users */
6932 },
6933 {
6934 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6935 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6936 .doit = devlink_nl_cmd_health_reporter_set_doit,
6937 .flags = GENL_ADMIN_PERM,
6938 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6939 DEVLINK_NL_FLAG_NO_LOCK,
6940 },
6941 {
6942 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6943 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6944 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6945 .flags = GENL_ADMIN_PERM,
6946 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6947 DEVLINK_NL_FLAG_NO_LOCK,
6948 },
6949 {
6950 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6951 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6952 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6953 .flags = GENL_ADMIN_PERM,
6954 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6955 DEVLINK_NL_FLAG_NO_LOCK,
6956 },
6957 {
6958 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6959 .validate = GENL_DONT_VALIDATE_STRICT |
6960 GENL_DONT_VALIDATE_DUMP_STRICT,
6961 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6962 .flags = GENL_ADMIN_PERM,
6963 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6964 DEVLINK_NL_FLAG_NO_LOCK,
6965 },
6966 {
6967 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6968 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6969 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6970 .flags = GENL_ADMIN_PERM,
6971 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6972 DEVLINK_NL_FLAG_NO_LOCK,
6973 },
6974 {
6975 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6976 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6977 .doit = devlink_nl_cmd_flash_update,
6978 .flags = GENL_ADMIN_PERM,
6979 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6980 },
6981 {
6982 .cmd = DEVLINK_CMD_TRAP_GET,
6983 .doit = devlink_nl_cmd_trap_get_doit,
6984 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6985 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6986 /* can be retrieved by unprivileged users */
6987 },
6988 {
6989 .cmd = DEVLINK_CMD_TRAP_SET,
6990 .doit = devlink_nl_cmd_trap_set_doit,
6991 .flags = GENL_ADMIN_PERM,
6992 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6993 },
6994 {
6995 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6996 .doit = devlink_nl_cmd_trap_group_get_doit,
6997 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6998 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6999 /* can be retrieved by unprivileged users */
7000 },
7001 {
7002 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
7003 .doit = devlink_nl_cmd_trap_group_set_doit,
7004 .flags = GENL_ADMIN_PERM,
7005 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7006 },
7007 {
7008 .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
7009 .doit = devlink_nl_cmd_trap_policer_get_doit,
7010 .dumpit = devlink_nl_cmd_trap_policer_get_dumpit,
7011 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7012 /* can be retrieved by unprivileged users */
7013 },
7014 {
7015 .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
7016 .doit = devlink_nl_cmd_trap_policer_set_doit,
7017 .flags = GENL_ADMIN_PERM,
7018 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7019 },
7020 };
7021
7022 static struct genl_family devlink_nl_family __ro_after_init = {
7023 .name = DEVLINK_GENL_NAME,
7024 .version = DEVLINK_GENL_VERSION,
7025 .maxattr = DEVLINK_ATTR_MAX,
7026 .policy = devlink_nl_policy,
7027 .netnsok = true,
7028 .pre_doit = devlink_nl_pre_doit,
7029 .post_doit = devlink_nl_post_doit,
7030 .module = THIS_MODULE,
7031 .ops = devlink_nl_ops,
7032 .n_ops = ARRAY_SIZE(devlink_nl_ops),
7033 .mcgrps = devlink_nl_mcgrps,
7034 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
7035 };
7036
7037 /**
7038 * devlink_alloc - Allocate new devlink instance resources
7039 *
7040 * @ops: ops
7041 * @priv_size: size of user private data
7042 *
7043 * Allocate new devlink instance resources, including devlink index
7044 * and name.
7045 */
7046 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
7047 {
7048 struct devlink *devlink;
7049
7050 if (WARN_ON(!ops))
7051 return NULL;
7052
7053 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
7054 if (!devlink)
7055 return NULL;
7056 devlink->ops = ops;
7057 xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
7058 __devlink_net_set(devlink, &init_net);
7059 INIT_LIST_HEAD(&devlink->port_list);
7060 INIT_LIST_HEAD(&devlink->sb_list);
7061 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
7062 INIT_LIST_HEAD(&devlink->resource_list);
7063 INIT_LIST_HEAD(&devlink->param_list);
7064 INIT_LIST_HEAD(&devlink->region_list);
7065 INIT_LIST_HEAD(&devlink->reporter_list);
7066 INIT_LIST_HEAD(&devlink->trap_list);
7067 INIT_LIST_HEAD(&devlink->trap_group_list);
7068 INIT_LIST_HEAD(&devlink->trap_policer_list);
7069 mutex_init(&devlink->lock);
7070 mutex_init(&devlink->reporters_lock);
7071 return devlink;
7072 }
7073 EXPORT_SYMBOL_GPL(devlink_alloc);
7074
7075 /**
7076 * devlink_register - Register devlink instance
7077 *
7078 * @devlink: devlink
7079 * @dev: parent device
7080 */
7081 int devlink_register(struct devlink *devlink, struct device *dev)
7082 {
7083 mutex_lock(&devlink_mutex);
7084 devlink->dev = dev;
7085 devlink->registered = true;
7086 list_add_tail(&devlink->list, &devlink_list);
7087 devlink_notify(devlink, DEVLINK_CMD_NEW);
7088 mutex_unlock(&devlink_mutex);
7089 return 0;
7090 }
7091 EXPORT_SYMBOL_GPL(devlink_register);
7092
7093 /**
7094 * devlink_unregister - Unregister devlink instance
7095 *
7096 * @devlink: devlink
7097 */
7098 void devlink_unregister(struct devlink *devlink)
7099 {
7100 mutex_lock(&devlink_mutex);
7101 WARN_ON(devlink_reload_supported(devlink) &&
7102 devlink->reload_enabled);
7103 devlink_notify(devlink, DEVLINK_CMD_DEL);
7104 list_del(&devlink->list);
7105 mutex_unlock(&devlink_mutex);
7106 }
7107 EXPORT_SYMBOL_GPL(devlink_unregister);
7108
7109 /**
7110 * devlink_reload_enable - Enable reload of devlink instance
7111 *
7112 * @devlink: devlink
7113 *
7114 * Should be called at end of device initialization
7115 * process when reload operation is supported.
7116 */
7117 void devlink_reload_enable(struct devlink *devlink)
7118 {
7119 mutex_lock(&devlink_mutex);
7120 devlink->reload_enabled = true;
7121 mutex_unlock(&devlink_mutex);
7122 }
7123 EXPORT_SYMBOL_GPL(devlink_reload_enable);
7124
7125 /**
7126 * devlink_reload_disable - Disable reload of devlink instance
7127 *
7128 * @devlink: devlink
7129 *
7130 * Should be called at the beginning of device cleanup
7131 * process when reload operation is supported.
7132 */
7133 void devlink_reload_disable(struct devlink *devlink)
7134 {
7135 mutex_lock(&devlink_mutex);
7136 /* Mutex is taken which ensures that no reload operation is in
7137 * progress while setting up forbidded flag.
7138 */
7139 devlink->reload_enabled = false;
7140 mutex_unlock(&devlink_mutex);
7141 }
7142 EXPORT_SYMBOL_GPL(devlink_reload_disable);
7143
7144 /**
7145 * devlink_free - Free devlink instance resources
7146 *
7147 * @devlink: devlink
7148 */
7149 void devlink_free(struct devlink *devlink)
7150 {
7151 mutex_destroy(&devlink->reporters_lock);
7152 mutex_destroy(&devlink->lock);
7153 WARN_ON(!list_empty(&devlink->trap_policer_list));
7154 WARN_ON(!list_empty(&devlink->trap_group_list));
7155 WARN_ON(!list_empty(&devlink->trap_list));
7156 WARN_ON(!list_empty(&devlink->reporter_list));
7157 WARN_ON(!list_empty(&devlink->region_list));
7158 WARN_ON(!list_empty(&devlink->param_list));
7159 WARN_ON(!list_empty(&devlink->resource_list));
7160 WARN_ON(!list_empty(&devlink->dpipe_table_list));
7161 WARN_ON(!list_empty(&devlink->sb_list));
7162 WARN_ON(!list_empty(&devlink->port_list));
7163
7164 xa_destroy(&devlink->snapshot_ids);
7165
7166 kfree(devlink);
7167 }
7168 EXPORT_SYMBOL_GPL(devlink_free);
7169
7170 static void devlink_port_type_warn(struct work_struct *work)
7171 {
7172 WARN(true, "Type was not set for devlink port.");
7173 }
7174
7175 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
7176 {
7177 /* Ignore CPU and DSA flavours. */
7178 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
7179 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
7180 }
7181
7182 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
7183
7184 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
7185 {
7186 if (!devlink_port_type_should_warn(devlink_port))
7187 return;
7188 /* Schedule a work to WARN in case driver does not set port
7189 * type within timeout.
7190 */
7191 schedule_delayed_work(&devlink_port->type_warn_dw,
7192 DEVLINK_PORT_TYPE_WARN_TIMEOUT);
7193 }
7194
7195 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
7196 {
7197 if (!devlink_port_type_should_warn(devlink_port))
7198 return;
7199 cancel_delayed_work_sync(&devlink_port->type_warn_dw);
7200 }
7201
7202 /**
7203 * devlink_port_register - Register devlink port
7204 *
7205 * @devlink: devlink
7206 * @devlink_port: devlink port
7207 * @port_index: driver-specific numerical identifier of the port
7208 *
7209 * Register devlink port with provided port index. User can use
7210 * any indexing, even hw-related one. devlink_port structure
7211 * is convenient to be embedded inside user driver private structure.
7212 * Note that the caller should take care of zeroing the devlink_port
7213 * structure.
7214 */
7215 int devlink_port_register(struct devlink *devlink,
7216 struct devlink_port *devlink_port,
7217 unsigned int port_index)
7218 {
7219 mutex_lock(&devlink->lock);
7220 if (devlink_port_index_exists(devlink, port_index)) {
7221 mutex_unlock(&devlink->lock);
7222 return -EEXIST;
7223 }
7224 devlink_port->devlink = devlink;
7225 devlink_port->index = port_index;
7226 devlink_port->registered = true;
7227 spin_lock_init(&devlink_port->type_lock);
7228 list_add_tail(&devlink_port->list, &devlink->port_list);
7229 INIT_LIST_HEAD(&devlink_port->param_list);
7230 mutex_unlock(&devlink->lock);
7231 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
7232 devlink_port_type_warn_schedule(devlink_port);
7233 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7234 return 0;
7235 }
7236 EXPORT_SYMBOL_GPL(devlink_port_register);
7237
7238 /**
7239 * devlink_port_unregister - Unregister devlink port
7240 *
7241 * @devlink_port: devlink port
7242 */
7243 void devlink_port_unregister(struct devlink_port *devlink_port)
7244 {
7245 struct devlink *devlink = devlink_port->devlink;
7246
7247 devlink_port_type_warn_cancel(devlink_port);
7248 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
7249 mutex_lock(&devlink->lock);
7250 list_del(&devlink_port->list);
7251 mutex_unlock(&devlink->lock);
7252 }
7253 EXPORT_SYMBOL_GPL(devlink_port_unregister);
7254
7255 static void __devlink_port_type_set(struct devlink_port *devlink_port,
7256 enum devlink_port_type type,
7257 void *type_dev)
7258 {
7259 if (WARN_ON(!devlink_port->registered))
7260 return;
7261 devlink_port_type_warn_cancel(devlink_port);
7262 spin_lock_bh(&devlink_port->type_lock);
7263 devlink_port->type = type;
7264 devlink_port->type_dev = type_dev;
7265 spin_unlock_bh(&devlink_port->type_lock);
7266 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7267 }
7268
7269 /**
7270 * devlink_port_type_eth_set - Set port type to Ethernet
7271 *
7272 * @devlink_port: devlink port
7273 * @netdev: related netdevice
7274 */
7275 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
7276 struct net_device *netdev)
7277 {
7278 const struct net_device_ops *ops = netdev->netdev_ops;
7279
7280 /* If driver registers devlink port, it should set devlink port
7281 * attributes accordingly so the compat functions are called
7282 * and the original ops are not used.
7283 */
7284 if (ops->ndo_get_phys_port_name) {
7285 /* Some drivers use the same set of ndos for netdevs
7286 * that have devlink_port registered and also for
7287 * those who don't. Make sure that ndo_get_phys_port_name
7288 * returns -EOPNOTSUPP here in case it is defined.
7289 * Warn if not.
7290 */
7291 char name[IFNAMSIZ];
7292 int err;
7293
7294 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
7295 WARN_ON(err != -EOPNOTSUPP);
7296 }
7297 if (ops->ndo_get_port_parent_id) {
7298 /* Some drivers use the same set of ndos for netdevs
7299 * that have devlink_port registered and also for
7300 * those who don't. Make sure that ndo_get_port_parent_id
7301 * returns -EOPNOTSUPP here in case it is defined.
7302 * Warn if not.
7303 */
7304 struct netdev_phys_item_id ppid;
7305 int err;
7306
7307 err = ops->ndo_get_port_parent_id(netdev, &ppid);
7308 WARN_ON(err != -EOPNOTSUPP);
7309 }
7310 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
7311 }
7312 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
7313
7314 /**
7315 * devlink_port_type_ib_set - Set port type to InfiniBand
7316 *
7317 * @devlink_port: devlink port
7318 * @ibdev: related IB device
7319 */
7320 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
7321 struct ib_device *ibdev)
7322 {
7323 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
7324 }
7325 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
7326
7327 /**
7328 * devlink_port_type_clear - Clear port type
7329 *
7330 * @devlink_port: devlink port
7331 */
7332 void devlink_port_type_clear(struct devlink_port *devlink_port)
7333 {
7334 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
7335 devlink_port_type_warn_schedule(devlink_port);
7336 }
7337 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
7338
7339 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
7340 enum devlink_port_flavour flavour,
7341 const unsigned char *switch_id,
7342 unsigned char switch_id_len)
7343 {
7344 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7345
7346 if (WARN_ON(devlink_port->registered))
7347 return -EEXIST;
7348 attrs->set = true;
7349 attrs->flavour = flavour;
7350 if (switch_id) {
7351 attrs->switch_port = true;
7352 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
7353 switch_id_len = MAX_PHYS_ITEM_ID_LEN;
7354 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
7355 attrs->switch_id.id_len = switch_id_len;
7356 } else {
7357 attrs->switch_port = false;
7358 }
7359 return 0;
7360 }
7361
7362 /**
7363 * devlink_port_attrs_set - Set port attributes
7364 *
7365 * @devlink_port: devlink port
7366 * @flavour: flavour of the port
7367 * @port_number: number of the port that is facing user, for example
7368 * the front panel port number
7369 * @split: indicates if this is split port
7370 * @split_subport_number: if the port is split, this is the number
7371 * of subport.
7372 * @switch_id: if the port is part of switch, this is buffer with ID,
7373 * otwerwise this is NULL
7374 * @switch_id_len: length of the switch_id buffer
7375 */
7376 void devlink_port_attrs_set(struct devlink_port *devlink_port,
7377 enum devlink_port_flavour flavour,
7378 u32 port_number, bool split,
7379 u32 split_subport_number,
7380 const unsigned char *switch_id,
7381 unsigned char switch_id_len)
7382 {
7383 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7384 int ret;
7385
7386 ret = __devlink_port_attrs_set(devlink_port, flavour,
7387 switch_id, switch_id_len);
7388 if (ret)
7389 return;
7390 attrs->split = split;
7391 attrs->phys.port_number = port_number;
7392 attrs->phys.split_subport_number = split_subport_number;
7393 }
7394 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
7395
7396 /**
7397 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
7398 *
7399 * @devlink_port: devlink port
7400 * @pf: associated PF for the devlink port instance
7401 * @switch_id: if the port is part of switch, this is buffer with ID,
7402 * otherwise this is NULL
7403 * @switch_id_len: length of the switch_id buffer
7404 */
7405 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
7406 const unsigned char *switch_id,
7407 unsigned char switch_id_len, u16 pf)
7408 {
7409 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7410 int ret;
7411
7412 ret = __devlink_port_attrs_set(devlink_port,
7413 DEVLINK_PORT_FLAVOUR_PCI_PF,
7414 switch_id, switch_id_len);
7415 if (ret)
7416 return;
7417
7418 attrs->pci_pf.pf = pf;
7419 }
7420 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
7421
7422 /**
7423 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
7424 *
7425 * @devlink_port: devlink port
7426 * @pf: associated PF for the devlink port instance
7427 * @vf: associated VF of a PF for the devlink port instance
7428 * @switch_id: if the port is part of switch, this is buffer with ID,
7429 * otherwise this is NULL
7430 * @switch_id_len: length of the switch_id buffer
7431 */
7432 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
7433 const unsigned char *switch_id,
7434 unsigned char switch_id_len,
7435 u16 pf, u16 vf)
7436 {
7437 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7438 int ret;
7439
7440 ret = __devlink_port_attrs_set(devlink_port,
7441 DEVLINK_PORT_FLAVOUR_PCI_VF,
7442 switch_id, switch_id_len);
7443 if (ret)
7444 return;
7445 attrs->pci_vf.pf = pf;
7446 attrs->pci_vf.vf = vf;
7447 }
7448 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
7449
7450 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
7451 char *name, size_t len)
7452 {
7453 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7454 int n = 0;
7455
7456 if (!attrs->set)
7457 return -EOPNOTSUPP;
7458
7459 switch (attrs->flavour) {
7460 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
7461 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
7462 if (!attrs->split)
7463 n = snprintf(name, len, "p%u", attrs->phys.port_number);
7464 else
7465 n = snprintf(name, len, "p%us%u",
7466 attrs->phys.port_number,
7467 attrs->phys.split_subport_number);
7468 break;
7469 case DEVLINK_PORT_FLAVOUR_CPU:
7470 case DEVLINK_PORT_FLAVOUR_DSA:
7471 /* As CPU and DSA ports do not have a netdevice associated
7472 * case should not ever happen.
7473 */
7474 WARN_ON(1);
7475 return -EINVAL;
7476 case DEVLINK_PORT_FLAVOUR_PCI_PF:
7477 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
7478 break;
7479 case DEVLINK_PORT_FLAVOUR_PCI_VF:
7480 n = snprintf(name, len, "pf%uvf%u",
7481 attrs->pci_vf.pf, attrs->pci_vf.vf);
7482 break;
7483 }
7484
7485 if (n >= len)
7486 return -EINVAL;
7487
7488 return 0;
7489 }
7490
7491 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
7492 u32 size, u16 ingress_pools_count,
7493 u16 egress_pools_count, u16 ingress_tc_count,
7494 u16 egress_tc_count)
7495 {
7496 struct devlink_sb *devlink_sb;
7497 int err = 0;
7498
7499 mutex_lock(&devlink->lock);
7500 if (devlink_sb_index_exists(devlink, sb_index)) {
7501 err = -EEXIST;
7502 goto unlock;
7503 }
7504
7505 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
7506 if (!devlink_sb) {
7507 err = -ENOMEM;
7508 goto unlock;
7509 }
7510 devlink_sb->index = sb_index;
7511 devlink_sb->size = size;
7512 devlink_sb->ingress_pools_count = ingress_pools_count;
7513 devlink_sb->egress_pools_count = egress_pools_count;
7514 devlink_sb->ingress_tc_count = ingress_tc_count;
7515 devlink_sb->egress_tc_count = egress_tc_count;
7516 list_add_tail(&devlink_sb->list, &devlink->sb_list);
7517 unlock:
7518 mutex_unlock(&devlink->lock);
7519 return err;
7520 }
7521 EXPORT_SYMBOL_GPL(devlink_sb_register);
7522
7523 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
7524 {
7525 struct devlink_sb *devlink_sb;
7526
7527 mutex_lock(&devlink->lock);
7528 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
7529 WARN_ON(!devlink_sb);
7530 list_del(&devlink_sb->list);
7531 mutex_unlock(&devlink->lock);
7532 kfree(devlink_sb);
7533 }
7534 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
7535
7536 /**
7537 * devlink_dpipe_headers_register - register dpipe headers
7538 *
7539 * @devlink: devlink
7540 * @dpipe_headers: dpipe header array
7541 *
7542 * Register the headers supported by hardware.
7543 */
7544 int devlink_dpipe_headers_register(struct devlink *devlink,
7545 struct devlink_dpipe_headers *dpipe_headers)
7546 {
7547 mutex_lock(&devlink->lock);
7548 devlink->dpipe_headers = dpipe_headers;
7549 mutex_unlock(&devlink->lock);
7550 return 0;
7551 }
7552 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
7553
7554 /**
7555 * devlink_dpipe_headers_unregister - unregister dpipe headers
7556 *
7557 * @devlink: devlink
7558 *
7559 * Unregister the headers supported by hardware.
7560 */
7561 void devlink_dpipe_headers_unregister(struct devlink *devlink)
7562 {
7563 mutex_lock(&devlink->lock);
7564 devlink->dpipe_headers = NULL;
7565 mutex_unlock(&devlink->lock);
7566 }
7567 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
7568
7569 /**
7570 * devlink_dpipe_table_counter_enabled - check if counter allocation
7571 * required
7572 * @devlink: devlink
7573 * @table_name: tables name
7574 *
7575 * Used by driver to check if counter allocation is required.
7576 * After counter allocation is turned on the table entries
7577 * are updated to include counter statistics.
7578 *
7579 * After that point on the driver must respect the counter
7580 * state so that each entry added to the table is added
7581 * with a counter.
7582 */
7583 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
7584 const char *table_name)
7585 {
7586 struct devlink_dpipe_table *table;
7587 bool enabled;
7588
7589 rcu_read_lock();
7590 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7591 table_name, devlink);
7592 enabled = false;
7593 if (table)
7594 enabled = table->counters_enabled;
7595 rcu_read_unlock();
7596 return enabled;
7597 }
7598 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
7599
7600 /**
7601 * devlink_dpipe_table_register - register dpipe table
7602 *
7603 * @devlink: devlink
7604 * @table_name: table name
7605 * @table_ops: table ops
7606 * @priv: priv
7607 * @counter_control_extern: external control for counters
7608 */
7609 int devlink_dpipe_table_register(struct devlink *devlink,
7610 const char *table_name,
7611 struct devlink_dpipe_table_ops *table_ops,
7612 void *priv, bool counter_control_extern)
7613 {
7614 struct devlink_dpipe_table *table;
7615 int err = 0;
7616
7617 if (WARN_ON(!table_ops->size_get))
7618 return -EINVAL;
7619
7620 mutex_lock(&devlink->lock);
7621
7622 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
7623 devlink)) {
7624 err = -EEXIST;
7625 goto unlock;
7626 }
7627
7628 table = kzalloc(sizeof(*table), GFP_KERNEL);
7629 if (!table) {
7630 err = -ENOMEM;
7631 goto unlock;
7632 }
7633
7634 table->name = table_name;
7635 table->table_ops = table_ops;
7636 table->priv = priv;
7637 table->counter_control_extern = counter_control_extern;
7638
7639 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
7640 unlock:
7641 mutex_unlock(&devlink->lock);
7642 return err;
7643 }
7644 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
7645
7646 /**
7647 * devlink_dpipe_table_unregister - unregister dpipe table
7648 *
7649 * @devlink: devlink
7650 * @table_name: table name
7651 */
7652 void devlink_dpipe_table_unregister(struct devlink *devlink,
7653 const char *table_name)
7654 {
7655 struct devlink_dpipe_table *table;
7656
7657 mutex_lock(&devlink->lock);
7658 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7659 table_name, devlink);
7660 if (!table)
7661 goto unlock;
7662 list_del_rcu(&table->list);
7663 mutex_unlock(&devlink->lock);
7664 kfree_rcu(table, rcu);
7665 return;
7666 unlock:
7667 mutex_unlock(&devlink->lock);
7668 }
7669 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
7670
7671 /**
7672 * devlink_resource_register - devlink resource register
7673 *
7674 * @devlink: devlink
7675 * @resource_name: resource's name
7676 * @resource_size: resource's size
7677 * @resource_id: resource's id
7678 * @parent_resource_id: resource's parent id
7679 * @size_params: size parameters
7680 */
7681 int devlink_resource_register(struct devlink *devlink,
7682 const char *resource_name,
7683 u64 resource_size,
7684 u64 resource_id,
7685 u64 parent_resource_id,
7686 const struct devlink_resource_size_params *size_params)
7687 {
7688 struct devlink_resource *resource;
7689 struct list_head *resource_list;
7690 bool top_hierarchy;
7691 int err = 0;
7692
7693 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
7694
7695 mutex_lock(&devlink->lock);
7696 resource = devlink_resource_find(devlink, NULL, resource_id);
7697 if (resource) {
7698 err = -EINVAL;
7699 goto out;
7700 }
7701
7702 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
7703 if (!resource) {
7704 err = -ENOMEM;
7705 goto out;
7706 }
7707
7708 if (top_hierarchy) {
7709 resource_list = &devlink->resource_list;
7710 } else {
7711 struct devlink_resource *parent_resource;
7712
7713 parent_resource = devlink_resource_find(devlink, NULL,
7714 parent_resource_id);
7715 if (parent_resource) {
7716 resource_list = &parent_resource->resource_list;
7717 resource->parent = parent_resource;
7718 } else {
7719 kfree(resource);
7720 err = -EINVAL;
7721 goto out;
7722 }
7723 }
7724
7725 resource->name = resource_name;
7726 resource->size = resource_size;
7727 resource->size_new = resource_size;
7728 resource->id = resource_id;
7729 resource->size_valid = true;
7730 memcpy(&resource->size_params, size_params,
7731 sizeof(resource->size_params));
7732 INIT_LIST_HEAD(&resource->resource_list);
7733 list_add_tail(&resource->list, resource_list);
7734 out:
7735 mutex_unlock(&devlink->lock);
7736 return err;
7737 }
7738 EXPORT_SYMBOL_GPL(devlink_resource_register);
7739
7740 /**
7741 * devlink_resources_unregister - free all resources
7742 *
7743 * @devlink: devlink
7744 * @resource: resource
7745 */
7746 void devlink_resources_unregister(struct devlink *devlink,
7747 struct devlink_resource *resource)
7748 {
7749 struct devlink_resource *tmp, *child_resource;
7750 struct list_head *resource_list;
7751
7752 if (resource)
7753 resource_list = &resource->resource_list;
7754 else
7755 resource_list = &devlink->resource_list;
7756
7757 if (!resource)
7758 mutex_lock(&devlink->lock);
7759
7760 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
7761 devlink_resources_unregister(devlink, child_resource);
7762 list_del(&child_resource->list);
7763 kfree(child_resource);
7764 }
7765
7766 if (!resource)
7767 mutex_unlock(&devlink->lock);
7768 }
7769 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
7770
7771 /**
7772 * devlink_resource_size_get - get and update size
7773 *
7774 * @devlink: devlink
7775 * @resource_id: the requested resource id
7776 * @p_resource_size: ptr to update
7777 */
7778 int devlink_resource_size_get(struct devlink *devlink,
7779 u64 resource_id,
7780 u64 *p_resource_size)
7781 {
7782 struct devlink_resource *resource;
7783 int err = 0;
7784
7785 mutex_lock(&devlink->lock);
7786 resource = devlink_resource_find(devlink, NULL, resource_id);
7787 if (!resource) {
7788 err = -EINVAL;
7789 goto out;
7790 }
7791 *p_resource_size = resource->size_new;
7792 resource->size = resource->size_new;
7793 out:
7794 mutex_unlock(&devlink->lock);
7795 return err;
7796 }
7797 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7798
7799 /**
7800 * devlink_dpipe_table_resource_set - set the resource id
7801 *
7802 * @devlink: devlink
7803 * @table_name: table name
7804 * @resource_id: resource id
7805 * @resource_units: number of resource's units consumed per table's entry
7806 */
7807 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7808 const char *table_name, u64 resource_id,
7809 u64 resource_units)
7810 {
7811 struct devlink_dpipe_table *table;
7812 int err = 0;
7813
7814 mutex_lock(&devlink->lock);
7815 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7816 table_name, devlink);
7817 if (!table) {
7818 err = -EINVAL;
7819 goto out;
7820 }
7821 table->resource_id = resource_id;
7822 table->resource_units = resource_units;
7823 table->resource_valid = true;
7824 out:
7825 mutex_unlock(&devlink->lock);
7826 return err;
7827 }
7828 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7829
7830 /**
7831 * devlink_resource_occ_get_register - register occupancy getter
7832 *
7833 * @devlink: devlink
7834 * @resource_id: resource id
7835 * @occ_get: occupancy getter callback
7836 * @occ_get_priv: occupancy getter callback priv
7837 */
7838 void devlink_resource_occ_get_register(struct devlink *devlink,
7839 u64 resource_id,
7840 devlink_resource_occ_get_t *occ_get,
7841 void *occ_get_priv)
7842 {
7843 struct devlink_resource *resource;
7844
7845 mutex_lock(&devlink->lock);
7846 resource = devlink_resource_find(devlink, NULL, resource_id);
7847 if (WARN_ON(!resource))
7848 goto out;
7849 WARN_ON(resource->occ_get);
7850
7851 resource->occ_get = occ_get;
7852 resource->occ_get_priv = occ_get_priv;
7853 out:
7854 mutex_unlock(&devlink->lock);
7855 }
7856 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7857
7858 /**
7859 * devlink_resource_occ_get_unregister - unregister occupancy getter
7860 *
7861 * @devlink: devlink
7862 * @resource_id: resource id
7863 */
7864 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7865 u64 resource_id)
7866 {
7867 struct devlink_resource *resource;
7868
7869 mutex_lock(&devlink->lock);
7870 resource = devlink_resource_find(devlink, NULL, resource_id);
7871 if (WARN_ON(!resource))
7872 goto out;
7873 WARN_ON(!resource->occ_get);
7874
7875 resource->occ_get = NULL;
7876 resource->occ_get_priv = NULL;
7877 out:
7878 mutex_unlock(&devlink->lock);
7879 }
7880 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7881
7882 static int devlink_param_verify(const struct devlink_param *param)
7883 {
7884 if (!param || !param->name || !param->supported_cmodes)
7885 return -EINVAL;
7886 if (param->generic)
7887 return devlink_param_generic_verify(param);
7888 else
7889 return devlink_param_driver_verify(param);
7890 }
7891
7892 static int __devlink_params_register(struct devlink *devlink,
7893 unsigned int port_index,
7894 struct list_head *param_list,
7895 const struct devlink_param *params,
7896 size_t params_count,
7897 enum devlink_command reg_cmd,
7898 enum devlink_command unreg_cmd)
7899 {
7900 const struct devlink_param *param = params;
7901 int i;
7902 int err;
7903
7904 mutex_lock(&devlink->lock);
7905 for (i = 0; i < params_count; i++, param++) {
7906 err = devlink_param_verify(param);
7907 if (err)
7908 goto rollback;
7909
7910 err = devlink_param_register_one(devlink, port_index,
7911 param_list, param, reg_cmd);
7912 if (err)
7913 goto rollback;
7914 }
7915
7916 mutex_unlock(&devlink->lock);
7917 return 0;
7918
7919 rollback:
7920 if (!i)
7921 goto unlock;
7922 for (param--; i > 0; i--, param--)
7923 devlink_param_unregister_one(devlink, port_index, param_list,
7924 param, unreg_cmd);
7925 unlock:
7926 mutex_unlock(&devlink->lock);
7927 return err;
7928 }
7929
7930 static void __devlink_params_unregister(struct devlink *devlink,
7931 unsigned int port_index,
7932 struct list_head *param_list,
7933 const struct devlink_param *params,
7934 size_t params_count,
7935 enum devlink_command cmd)
7936 {
7937 const struct devlink_param *param = params;
7938 int i;
7939
7940 mutex_lock(&devlink->lock);
7941 for (i = 0; i < params_count; i++, param++)
7942 devlink_param_unregister_one(devlink, 0, param_list, param,
7943 cmd);
7944 mutex_unlock(&devlink->lock);
7945 }
7946
7947 /**
7948 * devlink_params_register - register configuration parameters
7949 *
7950 * @devlink: devlink
7951 * @params: configuration parameters array
7952 * @params_count: number of parameters provided
7953 *
7954 * Register the configuration parameters supported by the driver.
7955 */
7956 int devlink_params_register(struct devlink *devlink,
7957 const struct devlink_param *params,
7958 size_t params_count)
7959 {
7960 return __devlink_params_register(devlink, 0, &devlink->param_list,
7961 params, params_count,
7962 DEVLINK_CMD_PARAM_NEW,
7963 DEVLINK_CMD_PARAM_DEL);
7964 }
7965 EXPORT_SYMBOL_GPL(devlink_params_register);
7966
7967 /**
7968 * devlink_params_unregister - unregister configuration parameters
7969 * @devlink: devlink
7970 * @params: configuration parameters to unregister
7971 * @params_count: number of parameters provided
7972 */
7973 void devlink_params_unregister(struct devlink *devlink,
7974 const struct devlink_param *params,
7975 size_t params_count)
7976 {
7977 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7978 params, params_count,
7979 DEVLINK_CMD_PARAM_DEL);
7980 }
7981 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7982
7983 /**
7984 * devlink_params_publish - publish configuration parameters
7985 *
7986 * @devlink: devlink
7987 *
7988 * Publish previously registered configuration parameters.
7989 */
7990 void devlink_params_publish(struct devlink *devlink)
7991 {
7992 struct devlink_param_item *param_item;
7993
7994 list_for_each_entry(param_item, &devlink->param_list, list) {
7995 if (param_item->published)
7996 continue;
7997 param_item->published = true;
7998 devlink_param_notify(devlink, 0, param_item,
7999 DEVLINK_CMD_PARAM_NEW);
8000 }
8001 }
8002 EXPORT_SYMBOL_GPL(devlink_params_publish);
8003
8004 /**
8005 * devlink_params_unpublish - unpublish configuration parameters
8006 *
8007 * @devlink: devlink
8008 *
8009 * Unpublish previously registered configuration parameters.
8010 */
8011 void devlink_params_unpublish(struct devlink *devlink)
8012 {
8013 struct devlink_param_item *param_item;
8014
8015 list_for_each_entry(param_item, &devlink->param_list, list) {
8016 if (!param_item->published)
8017 continue;
8018 param_item->published = false;
8019 devlink_param_notify(devlink, 0, param_item,
8020 DEVLINK_CMD_PARAM_DEL);
8021 }
8022 }
8023 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
8024
8025 /**
8026 * devlink_port_params_register - register port configuration parameters
8027 *
8028 * @devlink_port: devlink port
8029 * @params: configuration parameters array
8030 * @params_count: number of parameters provided
8031 *
8032 * Register the configuration parameters supported by the port.
8033 */
8034 int devlink_port_params_register(struct devlink_port *devlink_port,
8035 const struct devlink_param *params,
8036 size_t params_count)
8037 {
8038 return __devlink_params_register(devlink_port->devlink,
8039 devlink_port->index,
8040 &devlink_port->param_list, params,
8041 params_count,
8042 DEVLINK_CMD_PORT_PARAM_NEW,
8043 DEVLINK_CMD_PORT_PARAM_DEL);
8044 }
8045 EXPORT_SYMBOL_GPL(devlink_port_params_register);
8046
8047 /**
8048 * devlink_port_params_unregister - unregister port configuration
8049 * parameters
8050 *
8051 * @devlink_port: devlink port
8052 * @params: configuration parameters array
8053 * @params_count: number of parameters provided
8054 */
8055 void devlink_port_params_unregister(struct devlink_port *devlink_port,
8056 const struct devlink_param *params,
8057 size_t params_count)
8058 {
8059 return __devlink_params_unregister(devlink_port->devlink,
8060 devlink_port->index,
8061 &devlink_port->param_list,
8062 params, params_count,
8063 DEVLINK_CMD_PORT_PARAM_DEL);
8064 }
8065 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
8066
8067 static int
8068 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
8069 union devlink_param_value *init_val)
8070 {
8071 struct devlink_param_item *param_item;
8072
8073 param_item = devlink_param_find_by_id(param_list, param_id);
8074 if (!param_item)
8075 return -EINVAL;
8076
8077 if (!param_item->driverinit_value_valid ||
8078 !devlink_param_cmode_is_supported(param_item->param,
8079 DEVLINK_PARAM_CMODE_DRIVERINIT))
8080 return -EOPNOTSUPP;
8081
8082 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8083 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
8084 else
8085 *init_val = param_item->driverinit_value;
8086
8087 return 0;
8088 }
8089
8090 static int
8091 __devlink_param_driverinit_value_set(struct devlink *devlink,
8092 unsigned int port_index,
8093 struct list_head *param_list, u32 param_id,
8094 union devlink_param_value init_val,
8095 enum devlink_command cmd)
8096 {
8097 struct devlink_param_item *param_item;
8098
8099 param_item = devlink_param_find_by_id(param_list, param_id);
8100 if (!param_item)
8101 return -EINVAL;
8102
8103 if (!devlink_param_cmode_is_supported(param_item->param,
8104 DEVLINK_PARAM_CMODE_DRIVERINIT))
8105 return -EOPNOTSUPP;
8106
8107 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8108 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
8109 else
8110 param_item->driverinit_value = init_val;
8111 param_item->driverinit_value_valid = true;
8112
8113 devlink_param_notify(devlink, port_index, param_item, cmd);
8114 return 0;
8115 }
8116
8117 /**
8118 * devlink_param_driverinit_value_get - get configuration parameter
8119 * value for driver initializing
8120 *
8121 * @devlink: devlink
8122 * @param_id: parameter ID
8123 * @init_val: value of parameter in driverinit configuration mode
8124 *
8125 * This function should be used by the driver to get driverinit
8126 * configuration for initialization after reload command.
8127 */
8128 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
8129 union devlink_param_value *init_val)
8130 {
8131 if (!devlink_reload_supported(devlink))
8132 return -EOPNOTSUPP;
8133
8134 return __devlink_param_driverinit_value_get(&devlink->param_list,
8135 param_id, init_val);
8136 }
8137 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
8138
8139 /**
8140 * devlink_param_driverinit_value_set - set value of configuration
8141 * parameter for driverinit
8142 * configuration mode
8143 *
8144 * @devlink: devlink
8145 * @param_id: parameter ID
8146 * @init_val: value of parameter to set for driverinit configuration mode
8147 *
8148 * This function should be used by the driver to set driverinit
8149 * configuration mode default value.
8150 */
8151 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
8152 union devlink_param_value init_val)
8153 {
8154 return __devlink_param_driverinit_value_set(devlink, 0,
8155 &devlink->param_list,
8156 param_id, init_val,
8157 DEVLINK_CMD_PARAM_NEW);
8158 }
8159 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
8160
8161 /**
8162 * devlink_port_param_driverinit_value_get - get configuration parameter
8163 * value for driver initializing
8164 *
8165 * @devlink_port: devlink_port
8166 * @param_id: parameter ID
8167 * @init_val: value of parameter in driverinit configuration mode
8168 *
8169 * This function should be used by the driver to get driverinit
8170 * configuration for initialization after reload command.
8171 */
8172 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
8173 u32 param_id,
8174 union devlink_param_value *init_val)
8175 {
8176 struct devlink *devlink = devlink_port->devlink;
8177
8178 if (!devlink_reload_supported(devlink))
8179 return -EOPNOTSUPP;
8180
8181 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
8182 param_id, init_val);
8183 }
8184 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
8185
8186 /**
8187 * devlink_port_param_driverinit_value_set - set value of configuration
8188 * parameter for driverinit
8189 * configuration mode
8190 *
8191 * @devlink_port: devlink_port
8192 * @param_id: parameter ID
8193 * @init_val: value of parameter to set for driverinit configuration mode
8194 *
8195 * This function should be used by the driver to set driverinit
8196 * configuration mode default value.
8197 */
8198 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
8199 u32 param_id,
8200 union devlink_param_value init_val)
8201 {
8202 return __devlink_param_driverinit_value_set(devlink_port->devlink,
8203 devlink_port->index,
8204 &devlink_port->param_list,
8205 param_id, init_val,
8206 DEVLINK_CMD_PORT_PARAM_NEW);
8207 }
8208 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
8209
8210 /**
8211 * devlink_param_value_changed - notify devlink on a parameter's value
8212 * change. Should be called by the driver
8213 * right after the change.
8214 *
8215 * @devlink: devlink
8216 * @param_id: parameter ID
8217 *
8218 * This function should be used by the driver to notify devlink on value
8219 * change, excluding driverinit configuration mode.
8220 * For driverinit configuration mode driver should use the function
8221 */
8222 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
8223 {
8224 struct devlink_param_item *param_item;
8225
8226 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
8227 WARN_ON(!param_item);
8228
8229 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
8230 }
8231 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
8232
8233 /**
8234 * devlink_port_param_value_changed - notify devlink on a parameter's value
8235 * change. Should be called by the driver
8236 * right after the change.
8237 *
8238 * @devlink_port: devlink_port
8239 * @param_id: parameter ID
8240 *
8241 * This function should be used by the driver to notify devlink on value
8242 * change, excluding driverinit configuration mode.
8243 * For driverinit configuration mode driver should use the function
8244 * devlink_port_param_driverinit_value_set() instead.
8245 */
8246 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
8247 u32 param_id)
8248 {
8249 struct devlink_param_item *param_item;
8250
8251 param_item = devlink_param_find_by_id(&devlink_port->param_list,
8252 param_id);
8253 WARN_ON(!param_item);
8254
8255 devlink_param_notify(devlink_port->devlink, devlink_port->index,
8256 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
8257 }
8258 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
8259
8260 /**
8261 * devlink_param_value_str_fill - Safely fill-up the string preventing
8262 * from overflow of the preallocated buffer
8263 *
8264 * @dst_val: destination devlink_param_value
8265 * @src: source buffer
8266 */
8267 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
8268 const char *src)
8269 {
8270 size_t len;
8271
8272 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
8273 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
8274 }
8275 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
8276
8277 /**
8278 * devlink_region_create - create a new address region
8279 *
8280 * @devlink: devlink
8281 * @ops: region operations and name
8282 * @region_max_snapshots: Maximum supported number of snapshots for region
8283 * @region_size: size of region
8284 */
8285 struct devlink_region *
8286 devlink_region_create(struct devlink *devlink,
8287 const struct devlink_region_ops *ops,
8288 u32 region_max_snapshots, u64 region_size)
8289 {
8290 struct devlink_region *region;
8291 int err = 0;
8292
8293 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
8294 return ERR_PTR(-EINVAL);
8295
8296 mutex_lock(&devlink->lock);
8297
8298 if (devlink_region_get_by_name(devlink, ops->name)) {
8299 err = -EEXIST;
8300 goto unlock;
8301 }
8302
8303 region = kzalloc(sizeof(*region), GFP_KERNEL);
8304 if (!region) {
8305 err = -ENOMEM;
8306 goto unlock;
8307 }
8308
8309 region->devlink = devlink;
8310 region->max_snapshots = region_max_snapshots;
8311 region->ops = ops;
8312 region->size = region_size;
8313 INIT_LIST_HEAD(&region->snapshot_list);
8314 list_add_tail(&region->list, &devlink->region_list);
8315 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
8316
8317 mutex_unlock(&devlink->lock);
8318 return region;
8319
8320 unlock:
8321 mutex_unlock(&devlink->lock);
8322 return ERR_PTR(err);
8323 }
8324 EXPORT_SYMBOL_GPL(devlink_region_create);
8325
8326 /**
8327 * devlink_region_destroy - destroy address region
8328 *
8329 * @region: devlink region to destroy
8330 */
8331 void devlink_region_destroy(struct devlink_region *region)
8332 {
8333 struct devlink *devlink = region->devlink;
8334 struct devlink_snapshot *snapshot, *ts;
8335
8336 mutex_lock(&devlink->lock);
8337
8338 /* Free all snapshots of region */
8339 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
8340 devlink_region_snapshot_del(region, snapshot);
8341
8342 list_del(&region->list);
8343
8344 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
8345 mutex_unlock(&devlink->lock);
8346 kfree(region);
8347 }
8348 EXPORT_SYMBOL_GPL(devlink_region_destroy);
8349
8350 /**
8351 * devlink_region_snapshot_id_get - get snapshot ID
8352 *
8353 * This callback should be called when adding a new snapshot,
8354 * Driver should use the same id for multiple snapshots taken
8355 * on multiple regions at the same time/by the same trigger.
8356 *
8357 * The caller of this function must use devlink_region_snapshot_id_put
8358 * when finished creating regions using this id.
8359 *
8360 * Returns zero on success, or a negative error code on failure.
8361 *
8362 * @devlink: devlink
8363 * @id: storage to return id
8364 */
8365 int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
8366 {
8367 int err;
8368
8369 mutex_lock(&devlink->lock);
8370 err = __devlink_region_snapshot_id_get(devlink, id);
8371 mutex_unlock(&devlink->lock);
8372
8373 return err;
8374 }
8375 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
8376
8377 /**
8378 * devlink_region_snapshot_id_put - put snapshot ID reference
8379 *
8380 * This should be called by a driver after finishing creating snapshots
8381 * with an id. Doing so ensures that the ID can later be released in the
8382 * event that all snapshots using it have been destroyed.
8383 *
8384 * @devlink: devlink
8385 * @id: id to release reference on
8386 */
8387 void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
8388 {
8389 mutex_lock(&devlink->lock);
8390 __devlink_snapshot_id_decrement(devlink, id);
8391 mutex_unlock(&devlink->lock);
8392 }
8393 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
8394
8395 /**
8396 * devlink_region_snapshot_create - create a new snapshot
8397 * This will add a new snapshot of a region. The snapshot
8398 * will be stored on the region struct and can be accessed
8399 * from devlink. This is useful for future analyses of snapshots.
8400 * Multiple snapshots can be created on a region.
8401 * The @snapshot_id should be obtained using the getter function.
8402 *
8403 * @region: devlink region of the snapshot
8404 * @data: snapshot data
8405 * @snapshot_id: snapshot id to be created
8406 */
8407 int devlink_region_snapshot_create(struct devlink_region *region,
8408 u8 *data, u32 snapshot_id)
8409 {
8410 struct devlink *devlink = region->devlink;
8411 int err;
8412
8413 mutex_lock(&devlink->lock);
8414 err = __devlink_region_snapshot_create(region, data, snapshot_id);
8415 mutex_unlock(&devlink->lock);
8416
8417 return err;
8418 }
8419 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
8420
8421 #define DEVLINK_TRAP(_id, _type) \
8422 { \
8423 .type = DEVLINK_TRAP_TYPE_##_type, \
8424 .id = DEVLINK_TRAP_GENERIC_ID_##_id, \
8425 .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
8426 }
8427
8428 static const struct devlink_trap devlink_trap_generic[] = {
8429 DEVLINK_TRAP(SMAC_MC, DROP),
8430 DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
8431 DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
8432 DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
8433 DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
8434 DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
8435 DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
8436 DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
8437 DEVLINK_TRAP(TAIL_DROP, DROP),
8438 DEVLINK_TRAP(NON_IP_PACKET, DROP),
8439 DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
8440 DEVLINK_TRAP(DIP_LB, DROP),
8441 DEVLINK_TRAP(SIP_MC, DROP),
8442 DEVLINK_TRAP(SIP_LB, DROP),
8443 DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
8444 DEVLINK_TRAP(IPV4_SIP_BC, DROP),
8445 DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
8446 DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
8447 DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
8448 DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
8449 DEVLINK_TRAP(RPF, EXCEPTION),
8450 DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
8451 DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
8452 DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
8453 DEVLINK_TRAP(NON_ROUTABLE, DROP),
8454 DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
8455 DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
8456 DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
8457 DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
8458 };
8459
8460 #define DEVLINK_TRAP_GROUP(_id) \
8461 { \
8462 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
8463 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
8464 }
8465
8466 static const struct devlink_trap_group devlink_trap_group_generic[] = {
8467 DEVLINK_TRAP_GROUP(L2_DROPS),
8468 DEVLINK_TRAP_GROUP(L3_DROPS),
8469 DEVLINK_TRAP_GROUP(BUFFER_DROPS),
8470 DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
8471 DEVLINK_TRAP_GROUP(ACL_DROPS),
8472 };
8473
8474 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
8475 {
8476 if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
8477 return -EINVAL;
8478
8479 if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
8480 return -EINVAL;
8481
8482 if (trap->type != devlink_trap_generic[trap->id].type)
8483 return -EINVAL;
8484
8485 return 0;
8486 }
8487
8488 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
8489 {
8490 int i;
8491
8492 if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
8493 return -EINVAL;
8494
8495 for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
8496 if (!strcmp(trap->name, devlink_trap_generic[i].name))
8497 return -EEXIST;
8498 }
8499
8500 return 0;
8501 }
8502
8503 static int devlink_trap_verify(const struct devlink_trap *trap)
8504 {
8505 if (!trap || !trap->name)
8506 return -EINVAL;
8507
8508 if (trap->generic)
8509 return devlink_trap_generic_verify(trap);
8510 else
8511 return devlink_trap_driver_verify(trap);
8512 }
8513
8514 static int
8515 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
8516 {
8517 if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8518 return -EINVAL;
8519
8520 if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
8521 return -EINVAL;
8522
8523 return 0;
8524 }
8525
8526 static int
8527 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
8528 {
8529 int i;
8530
8531 if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8532 return -EINVAL;
8533
8534 for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
8535 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
8536 return -EEXIST;
8537 }
8538
8539 return 0;
8540 }
8541
8542 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
8543 {
8544 if (group->generic)
8545 return devlink_trap_group_generic_verify(group);
8546 else
8547 return devlink_trap_group_driver_verify(group);
8548 }
8549
8550 static void
8551 devlink_trap_group_notify(struct devlink *devlink,
8552 const struct devlink_trap_group_item *group_item,
8553 enum devlink_command cmd)
8554 {
8555 struct sk_buff *msg;
8556 int err;
8557
8558 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
8559 cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
8560
8561 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8562 if (!msg)
8563 return;
8564
8565 err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
8566 0);
8567 if (err) {
8568 nlmsg_free(msg);
8569 return;
8570 }
8571
8572 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8573 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8574 }
8575
8576 static int
8577 devlink_trap_item_group_link(struct devlink *devlink,
8578 struct devlink_trap_item *trap_item)
8579 {
8580 u16 group_id = trap_item->trap->init_group_id;
8581 struct devlink_trap_group_item *group_item;
8582
8583 group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
8584 if (WARN_ON_ONCE(!group_item))
8585 return -EINVAL;
8586
8587 trap_item->group_item = group_item;
8588
8589 return 0;
8590 }
8591
8592 static void devlink_trap_notify(struct devlink *devlink,
8593 const struct devlink_trap_item *trap_item,
8594 enum devlink_command cmd)
8595 {
8596 struct sk_buff *msg;
8597 int err;
8598
8599 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
8600 cmd != DEVLINK_CMD_TRAP_DEL);
8601
8602 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8603 if (!msg)
8604 return;
8605
8606 err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
8607 if (err) {
8608 nlmsg_free(msg);
8609 return;
8610 }
8611
8612 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8613 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8614 }
8615
8616 static int
8617 devlink_trap_register(struct devlink *devlink,
8618 const struct devlink_trap *trap, void *priv)
8619 {
8620 struct devlink_trap_item *trap_item;
8621 int err;
8622
8623 if (devlink_trap_item_lookup(devlink, trap->name))
8624 return -EEXIST;
8625
8626 trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
8627 if (!trap_item)
8628 return -ENOMEM;
8629
8630 trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8631 if (!trap_item->stats) {
8632 err = -ENOMEM;
8633 goto err_stats_alloc;
8634 }
8635
8636 trap_item->trap = trap;
8637 trap_item->action = trap->init_action;
8638 trap_item->priv = priv;
8639
8640 err = devlink_trap_item_group_link(devlink, trap_item);
8641 if (err)
8642 goto err_group_link;
8643
8644 err = devlink->ops->trap_init(devlink, trap, trap_item);
8645 if (err)
8646 goto err_trap_init;
8647
8648 list_add_tail(&trap_item->list, &devlink->trap_list);
8649 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
8650
8651 return 0;
8652
8653 err_trap_init:
8654 err_group_link:
8655 free_percpu(trap_item->stats);
8656 err_stats_alloc:
8657 kfree(trap_item);
8658 return err;
8659 }
8660
8661 static void devlink_trap_unregister(struct devlink *devlink,
8662 const struct devlink_trap *trap)
8663 {
8664 struct devlink_trap_item *trap_item;
8665
8666 trap_item = devlink_trap_item_lookup(devlink, trap->name);
8667 if (WARN_ON_ONCE(!trap_item))
8668 return;
8669
8670 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
8671 list_del(&trap_item->list);
8672 if (devlink->ops->trap_fini)
8673 devlink->ops->trap_fini(devlink, trap, trap_item);
8674 free_percpu(trap_item->stats);
8675 kfree(trap_item);
8676 }
8677
8678 static void devlink_trap_disable(struct devlink *devlink,
8679 const struct devlink_trap *trap)
8680 {
8681 struct devlink_trap_item *trap_item;
8682
8683 trap_item = devlink_trap_item_lookup(devlink, trap->name);
8684 if (WARN_ON_ONCE(!trap_item))
8685 return;
8686
8687 devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
8688 trap_item->action = DEVLINK_TRAP_ACTION_DROP;
8689 }
8690
8691 /**
8692 * devlink_traps_register - Register packet traps with devlink.
8693 * @devlink: devlink.
8694 * @traps: Packet traps.
8695 * @traps_count: Count of provided packet traps.
8696 * @priv: Driver private information.
8697 *
8698 * Return: Non-zero value on failure.
8699 */
8700 int devlink_traps_register(struct devlink *devlink,
8701 const struct devlink_trap *traps,
8702 size_t traps_count, void *priv)
8703 {
8704 int i, err;
8705
8706 if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8707 return -EINVAL;
8708
8709 mutex_lock(&devlink->lock);
8710 for (i = 0; i < traps_count; i++) {
8711 const struct devlink_trap *trap = &traps[i];
8712
8713 err = devlink_trap_verify(trap);
8714 if (err)
8715 goto err_trap_verify;
8716
8717 err = devlink_trap_register(devlink, trap, priv);
8718 if (err)
8719 goto err_trap_register;
8720 }
8721 mutex_unlock(&devlink->lock);
8722
8723 return 0;
8724
8725 err_trap_register:
8726 err_trap_verify:
8727 for (i--; i >= 0; i--)
8728 devlink_trap_unregister(devlink, &traps[i]);
8729 mutex_unlock(&devlink->lock);
8730 return err;
8731 }
8732 EXPORT_SYMBOL_GPL(devlink_traps_register);
8733
8734 /**
8735 * devlink_traps_unregister - Unregister packet traps from devlink.
8736 * @devlink: devlink.
8737 * @traps: Packet traps.
8738 * @traps_count: Count of provided packet traps.
8739 */
8740 void devlink_traps_unregister(struct devlink *devlink,
8741 const struct devlink_trap *traps,
8742 size_t traps_count)
8743 {
8744 int i;
8745
8746 mutex_lock(&devlink->lock);
8747 /* Make sure we do not have any packets in-flight while unregistering
8748 * traps by disabling all of them and waiting for a grace period.
8749 */
8750 for (i = traps_count - 1; i >= 0; i--)
8751 devlink_trap_disable(devlink, &traps[i]);
8752 synchronize_rcu();
8753 for (i = traps_count - 1; i >= 0; i--)
8754 devlink_trap_unregister(devlink, &traps[i]);
8755 mutex_unlock(&devlink->lock);
8756 }
8757 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8758
8759 static void
8760 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8761 size_t skb_len)
8762 {
8763 struct devlink_stats *stats;
8764
8765 stats = this_cpu_ptr(trap_stats);
8766 u64_stats_update_begin(&stats->syncp);
8767 stats->rx_bytes += skb_len;
8768 stats->rx_packets++;
8769 u64_stats_update_end(&stats->syncp);
8770 }
8771
8772 static void
8773 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8774 const struct devlink_trap_item *trap_item,
8775 struct devlink_port *in_devlink_port,
8776 const struct flow_action_cookie *fa_cookie)
8777 {
8778 struct devlink_trap_group_item *group_item = trap_item->group_item;
8779
8780 hw_metadata->trap_group_name = group_item->group->name;
8781 hw_metadata->trap_name = trap_item->trap->name;
8782 hw_metadata->fa_cookie = fa_cookie;
8783
8784 spin_lock(&in_devlink_port->type_lock);
8785 if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8786 hw_metadata->input_dev = in_devlink_port->type_dev;
8787 spin_unlock(&in_devlink_port->type_lock);
8788 }
8789
8790 /**
8791 * devlink_trap_report - Report trapped packet to drop monitor.
8792 * @devlink: devlink.
8793 * @skb: Trapped packet.
8794 * @trap_ctx: Trap context.
8795 * @in_devlink_port: Input devlink port.
8796 * @fa_cookie: Flow action cookie. Could be NULL.
8797 */
8798 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8799 void *trap_ctx, struct devlink_port *in_devlink_port,
8800 const struct flow_action_cookie *fa_cookie)
8801
8802 {
8803 struct devlink_trap_item *trap_item = trap_ctx;
8804 struct net_dm_hw_metadata hw_metadata = {};
8805
8806 devlink_trap_stats_update(trap_item->stats, skb->len);
8807 devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8808
8809 devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8810 in_devlink_port, fa_cookie);
8811 net_dm_hw_report(skb, &hw_metadata);
8812 }
8813 EXPORT_SYMBOL_GPL(devlink_trap_report);
8814
8815 /**
8816 * devlink_trap_ctx_priv - Trap context to driver private information.
8817 * @trap_ctx: Trap context.
8818 *
8819 * Return: Driver private information passed during registration.
8820 */
8821 void *devlink_trap_ctx_priv(void *trap_ctx)
8822 {
8823 struct devlink_trap_item *trap_item = trap_ctx;
8824
8825 return trap_item->priv;
8826 }
8827 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8828
8829 static int
8830 devlink_trap_group_item_policer_link(struct devlink *devlink,
8831 struct devlink_trap_group_item *group_item)
8832 {
8833 u32 policer_id = group_item->group->init_policer_id;
8834 struct devlink_trap_policer_item *policer_item;
8835
8836 if (policer_id == 0)
8837 return 0;
8838
8839 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
8840 if (WARN_ON_ONCE(!policer_item))
8841 return -EINVAL;
8842
8843 group_item->policer_item = policer_item;
8844
8845 return 0;
8846 }
8847
8848 static int
8849 devlink_trap_group_register(struct devlink *devlink,
8850 const struct devlink_trap_group *group)
8851 {
8852 struct devlink_trap_group_item *group_item;
8853 int err;
8854
8855 if (devlink_trap_group_item_lookup(devlink, group->name))
8856 return -EEXIST;
8857
8858 group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
8859 if (!group_item)
8860 return -ENOMEM;
8861
8862 group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8863 if (!group_item->stats) {
8864 err = -ENOMEM;
8865 goto err_stats_alloc;
8866 }
8867
8868 group_item->group = group;
8869
8870 err = devlink_trap_group_item_policer_link(devlink, group_item);
8871 if (err)
8872 goto err_policer_link;
8873
8874 if (devlink->ops->trap_group_init) {
8875 err = devlink->ops->trap_group_init(devlink, group);
8876 if (err)
8877 goto err_group_init;
8878 }
8879
8880 list_add_tail(&group_item->list, &devlink->trap_group_list);
8881 devlink_trap_group_notify(devlink, group_item,
8882 DEVLINK_CMD_TRAP_GROUP_NEW);
8883
8884 return 0;
8885
8886 err_group_init:
8887 err_policer_link:
8888 free_percpu(group_item->stats);
8889 err_stats_alloc:
8890 kfree(group_item);
8891 return err;
8892 }
8893
8894 static void
8895 devlink_trap_group_unregister(struct devlink *devlink,
8896 const struct devlink_trap_group *group)
8897 {
8898 struct devlink_trap_group_item *group_item;
8899
8900 group_item = devlink_trap_group_item_lookup(devlink, group->name);
8901 if (WARN_ON_ONCE(!group_item))
8902 return;
8903
8904 devlink_trap_group_notify(devlink, group_item,
8905 DEVLINK_CMD_TRAP_GROUP_DEL);
8906 list_del(&group_item->list);
8907 free_percpu(group_item->stats);
8908 kfree(group_item);
8909 }
8910
8911 /**
8912 * devlink_trap_groups_register - Register packet trap groups with devlink.
8913 * @devlink: devlink.
8914 * @groups: Packet trap groups.
8915 * @groups_count: Count of provided packet trap groups.
8916 *
8917 * Return: Non-zero value on failure.
8918 */
8919 int devlink_trap_groups_register(struct devlink *devlink,
8920 const struct devlink_trap_group *groups,
8921 size_t groups_count)
8922 {
8923 int i, err;
8924
8925 mutex_lock(&devlink->lock);
8926 for (i = 0; i < groups_count; i++) {
8927 const struct devlink_trap_group *group = &groups[i];
8928
8929 err = devlink_trap_group_verify(group);
8930 if (err)
8931 goto err_trap_group_verify;
8932
8933 err = devlink_trap_group_register(devlink, group);
8934 if (err)
8935 goto err_trap_group_register;
8936 }
8937 mutex_unlock(&devlink->lock);
8938
8939 return 0;
8940
8941 err_trap_group_register:
8942 err_trap_group_verify:
8943 for (i--; i >= 0; i--)
8944 devlink_trap_group_unregister(devlink, &groups[i]);
8945 mutex_unlock(&devlink->lock);
8946 return err;
8947 }
8948 EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
8949
8950 /**
8951 * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
8952 * @devlink: devlink.
8953 * @groups: Packet trap groups.
8954 * @groups_count: Count of provided packet trap groups.
8955 */
8956 void devlink_trap_groups_unregister(struct devlink *devlink,
8957 const struct devlink_trap_group *groups,
8958 size_t groups_count)
8959 {
8960 int i;
8961
8962 mutex_lock(&devlink->lock);
8963 for (i = groups_count - 1; i >= 0; i--)
8964 devlink_trap_group_unregister(devlink, &groups[i]);
8965 mutex_unlock(&devlink->lock);
8966 }
8967 EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
8968
8969 static void
8970 devlink_trap_policer_notify(struct devlink *devlink,
8971 const struct devlink_trap_policer_item *policer_item,
8972 enum devlink_command cmd)
8973 {
8974 struct sk_buff *msg;
8975 int err;
8976
8977 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
8978 cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
8979
8980 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8981 if (!msg)
8982 return;
8983
8984 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
8985 0, 0);
8986 if (err) {
8987 nlmsg_free(msg);
8988 return;
8989 }
8990
8991 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8992 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8993 }
8994
8995 static int
8996 devlink_trap_policer_register(struct devlink *devlink,
8997 const struct devlink_trap_policer *policer)
8998 {
8999 struct devlink_trap_policer_item *policer_item;
9000 int err;
9001
9002 if (devlink_trap_policer_item_lookup(devlink, policer->id))
9003 return -EEXIST;
9004
9005 policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
9006 if (!policer_item)
9007 return -ENOMEM;
9008
9009 policer_item->policer = policer;
9010 policer_item->rate = policer->init_rate;
9011 policer_item->burst = policer->init_burst;
9012
9013 if (devlink->ops->trap_policer_init) {
9014 err = devlink->ops->trap_policer_init(devlink, policer);
9015 if (err)
9016 goto err_policer_init;
9017 }
9018
9019 list_add_tail(&policer_item->list, &devlink->trap_policer_list);
9020 devlink_trap_policer_notify(devlink, policer_item,
9021 DEVLINK_CMD_TRAP_POLICER_NEW);
9022
9023 return 0;
9024
9025 err_policer_init:
9026 kfree(policer_item);
9027 return err;
9028 }
9029
9030 static void
9031 devlink_trap_policer_unregister(struct devlink *devlink,
9032 const struct devlink_trap_policer *policer)
9033 {
9034 struct devlink_trap_policer_item *policer_item;
9035
9036 policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
9037 if (WARN_ON_ONCE(!policer_item))
9038 return;
9039
9040 devlink_trap_policer_notify(devlink, policer_item,
9041 DEVLINK_CMD_TRAP_POLICER_DEL);
9042 list_del(&policer_item->list);
9043 if (devlink->ops->trap_policer_fini)
9044 devlink->ops->trap_policer_fini(devlink, policer);
9045 kfree(policer_item);
9046 }
9047
9048 /**
9049 * devlink_trap_policers_register - Register packet trap policers with devlink.
9050 * @devlink: devlink.
9051 * @policers: Packet trap policers.
9052 * @policers_count: Count of provided packet trap policers.
9053 *
9054 * Return: Non-zero value on failure.
9055 */
9056 int
9057 devlink_trap_policers_register(struct devlink *devlink,
9058 const struct devlink_trap_policer *policers,
9059 size_t policers_count)
9060 {
9061 int i, err;
9062
9063 mutex_lock(&devlink->lock);
9064 for (i = 0; i < policers_count; i++) {
9065 const struct devlink_trap_policer *policer = &policers[i];
9066
9067 if (WARN_ON(policer->id == 0 ||
9068 policer->max_rate < policer->min_rate ||
9069 policer->max_burst < policer->min_burst)) {
9070 err = -EINVAL;
9071 goto err_trap_policer_verify;
9072 }
9073
9074 err = devlink_trap_policer_register(devlink, policer);
9075 if (err)
9076 goto err_trap_policer_register;
9077 }
9078 mutex_unlock(&devlink->lock);
9079
9080 return 0;
9081
9082 err_trap_policer_register:
9083 err_trap_policer_verify:
9084 for (i--; i >= 0; i--)
9085 devlink_trap_policer_unregister(devlink, &policers[i]);
9086 mutex_unlock(&devlink->lock);
9087 return err;
9088 }
9089 EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
9090
9091 /**
9092 * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
9093 * @devlink: devlink.
9094 * @policers: Packet trap policers.
9095 * @policers_count: Count of provided packet trap policers.
9096 */
9097 void
9098 devlink_trap_policers_unregister(struct devlink *devlink,
9099 const struct devlink_trap_policer *policers,
9100 size_t policers_count)
9101 {
9102 int i;
9103
9104 mutex_lock(&devlink->lock);
9105 for (i = policers_count - 1; i >= 0; i--)
9106 devlink_trap_policer_unregister(devlink, &policers[i]);
9107 mutex_unlock(&devlink->lock);
9108 }
9109 EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
9110
9111 static void __devlink_compat_running_version(struct devlink *devlink,
9112 char *buf, size_t len)
9113 {
9114 const struct nlattr *nlattr;
9115 struct devlink_info_req req;
9116 struct sk_buff *msg;
9117 int rem, err;
9118
9119 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9120 if (!msg)
9121 return;
9122
9123 req.msg = msg;
9124 err = devlink->ops->info_get(devlink, &req, NULL);
9125 if (err)
9126 goto free_msg;
9127
9128 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
9129 const struct nlattr *kv;
9130 int rem_kv;
9131
9132 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
9133 continue;
9134
9135 nla_for_each_nested(kv, nlattr, rem_kv) {
9136 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
9137 continue;
9138
9139 strlcat(buf, nla_data(kv), len);
9140 strlcat(buf, " ", len);
9141 }
9142 }
9143 free_msg:
9144 nlmsg_free(msg);
9145 }
9146
9147 void devlink_compat_running_version(struct net_device *dev,
9148 char *buf, size_t len)
9149 {
9150 struct devlink *devlink;
9151
9152 dev_hold(dev);
9153 rtnl_unlock();
9154
9155 devlink = netdev_to_devlink(dev);
9156 if (!devlink || !devlink->ops->info_get)
9157 goto out;
9158
9159 mutex_lock(&devlink->lock);
9160 __devlink_compat_running_version(devlink, buf, len);
9161 mutex_unlock(&devlink->lock);
9162
9163 out:
9164 rtnl_lock();
9165 dev_put(dev);
9166 }
9167
9168 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
9169 {
9170 struct devlink *devlink;
9171 int ret;
9172
9173 dev_hold(dev);
9174 rtnl_unlock();
9175
9176 devlink = netdev_to_devlink(dev);
9177 if (!devlink || !devlink->ops->flash_update) {
9178 ret = -EOPNOTSUPP;
9179 goto out;
9180 }
9181
9182 mutex_lock(&devlink->lock);
9183 ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
9184 mutex_unlock(&devlink->lock);
9185
9186 out:
9187 rtnl_lock();
9188 dev_put(dev);
9189
9190 return ret;
9191 }
9192
9193 int devlink_compat_phys_port_name_get(struct net_device *dev,
9194 char *name, size_t len)
9195 {
9196 struct devlink_port *devlink_port;
9197
9198 /* RTNL mutex is held here which ensures that devlink_port
9199 * instance cannot disappear in the middle. No need to take
9200 * any devlink lock as only permanent values are accessed.
9201 */
9202 ASSERT_RTNL();
9203
9204 devlink_port = netdev_to_devlink_port(dev);
9205 if (!devlink_port)
9206 return -EOPNOTSUPP;
9207
9208 return __devlink_port_phys_port_name_get(devlink_port, name, len);
9209 }
9210
9211 int devlink_compat_switch_id_get(struct net_device *dev,
9212 struct netdev_phys_item_id *ppid)
9213 {
9214 struct devlink_port *devlink_port;
9215
9216 /* Caller must hold RTNL mutex or reference to dev, which ensures that
9217 * devlink_port instance cannot disappear in the middle. No need to take
9218 * any devlink lock as only permanent values are accessed.
9219 */
9220 devlink_port = netdev_to_devlink_port(dev);
9221 if (!devlink_port || !devlink_port->attrs.switch_port)
9222 return -EOPNOTSUPP;
9223
9224 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
9225
9226 return 0;
9227 }
9228
9229 static void __net_exit devlink_pernet_pre_exit(struct net *net)
9230 {
9231 struct devlink *devlink;
9232 int err;
9233
9234 /* In case network namespace is getting destroyed, reload
9235 * all devlink instances from this namespace into init_net.
9236 */
9237 mutex_lock(&devlink_mutex);
9238 list_for_each_entry(devlink, &devlink_list, list) {
9239 if (net_eq(devlink_net(devlink), net)) {
9240 if (WARN_ON(!devlink_reload_supported(devlink)))
9241 continue;
9242 err = devlink_reload(devlink, &init_net, NULL);
9243 if (err && err != -EOPNOTSUPP)
9244 pr_warn("Failed to reload devlink instance into init_net\n");
9245 }
9246 }
9247 mutex_unlock(&devlink_mutex);
9248 }
9249
9250 static struct pernet_operations devlink_pernet_ops __net_initdata = {
9251 .pre_exit = devlink_pernet_pre_exit,
9252 };
9253
9254 static int __init devlink_init(void)
9255 {
9256 int err;
9257
9258 err = genl_register_family(&devlink_nl_family);
9259 if (err)
9260 goto out;
9261 err = register_pernet_subsys(&devlink_pernet_ops);
9262
9263 out:
9264 WARN_ON(err);
9265 return err;
9266 }
9267
9268 subsys_initcall(devlink_init);
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