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[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
4288 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4289 region, attrs,
4290 start_offset,
4291 end_offset, dump,
4292 &ret_offset);
4293
4294 if (err && err != -EMSGSIZE)
4295 goto nla_put_failure;
4296
4297 /* Check if there was any progress done to prevent infinite loop */
4298 if (ret_offset == start_offset) {
4299 err = -EINVAL;
4300 goto nla_put_failure;
4301 }
4302
4303 *((u64 *)&cb->args[0]) = ret_offset;
4304
4305 nla_nest_end(skb, chunks_attr);
4306 genlmsg_end(skb, hdr);
4307 mutex_unlock(&devlink->lock);
4308 mutex_unlock(&devlink_mutex);
4309
4310 return skb->len;
4311
4312 nla_put_failure:
4313 genlmsg_cancel(skb, hdr);
4314 out_unlock:
4315 mutex_unlock(&devlink->lock);
4316 out_dev:
4317 mutex_unlock(&devlink_mutex);
4318 return err;
4319 }
4320
4321 struct devlink_info_req {
4322 struct sk_buff *msg;
4323 };
4324
4325 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4326 {
4327 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4328 }
4329 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4330
4331 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4332 {
4333 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4334 }
4335 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4336
4337 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4338 const char *version_name,
4339 const char *version_value)
4340 {
4341 struct nlattr *nest;
4342 int err;
4343
4344 nest = nla_nest_start_noflag(req->msg, attr);
4345 if (!nest)
4346 return -EMSGSIZE;
4347
4348 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4349 version_name);
4350 if (err)
4351 goto nla_put_failure;
4352
4353 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4354 version_value);
4355 if (err)
4356 goto nla_put_failure;
4357
4358 nla_nest_end(req->msg, nest);
4359
4360 return 0;
4361
4362 nla_put_failure:
4363 nla_nest_cancel(req->msg, nest);
4364 return err;
4365 }
4366
4367 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4368 const char *version_name,
4369 const char *version_value)
4370 {
4371 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4372 version_name, version_value);
4373 }
4374 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4375
4376 int devlink_info_version_stored_put(struct devlink_info_req *req,
4377 const char *version_name,
4378 const char *version_value)
4379 {
4380 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4381 version_name, version_value);
4382 }
4383 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4384
4385 int devlink_info_version_running_put(struct devlink_info_req *req,
4386 const char *version_name,
4387 const char *version_value)
4388 {
4389 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4390 version_name, version_value);
4391 }
4392 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4393
4394 static int
4395 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4396 enum devlink_command cmd, u32 portid,
4397 u32 seq, int flags, struct netlink_ext_ack *extack)
4398 {
4399 struct devlink_info_req req;
4400 void *hdr;
4401 int err;
4402
4403 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4404 if (!hdr)
4405 return -EMSGSIZE;
4406
4407 err = -EMSGSIZE;
4408 if (devlink_nl_put_handle(msg, devlink))
4409 goto err_cancel_msg;
4410
4411 req.msg = msg;
4412 err = devlink->ops->info_get(devlink, &req, extack);
4413 if (err)
4414 goto err_cancel_msg;
4415
4416 genlmsg_end(msg, hdr);
4417 return 0;
4418
4419 err_cancel_msg:
4420 genlmsg_cancel(msg, hdr);
4421 return err;
4422 }
4423
4424 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4425 struct genl_info *info)
4426 {
4427 struct devlink *devlink = info->user_ptr[0];
4428 struct sk_buff *msg;
4429 int err;
4430
4431 if (!devlink->ops->info_get)
4432 return -EOPNOTSUPP;
4433
4434 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4435 if (!msg)
4436 return -ENOMEM;
4437
4438 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4439 info->snd_portid, info->snd_seq, 0,
4440 info->extack);
4441 if (err) {
4442 nlmsg_free(msg);
4443 return err;
4444 }
4445
4446 return genlmsg_reply(msg, info);
4447 }
4448
4449 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4450 struct netlink_callback *cb)
4451 {
4452 struct devlink *devlink;
4453 int start = cb->args[0];
4454 int idx = 0;
4455 int err = 0;
4456
4457 mutex_lock(&devlink_mutex);
4458 list_for_each_entry(devlink, &devlink_list, list) {
4459 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4460 continue;
4461 if (idx < start) {
4462 idx++;
4463 continue;
4464 }
4465
4466 if (!devlink->ops->info_get) {
4467 idx++;
4468 continue;
4469 }
4470
4471 mutex_lock(&devlink->lock);
4472 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4473 NETLINK_CB(cb->skb).portid,
4474 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4475 cb->extack);
4476 mutex_unlock(&devlink->lock);
4477 if (err && err != -EOPNOTSUPP)
4478 break;
4479 idx++;
4480 }
4481 mutex_unlock(&devlink_mutex);
4482
4483 if (err != -EMSGSIZE)
4484 return err;
4485
4486 cb->args[0] = idx;
4487 return msg->len;
4488 }
4489
4490 struct devlink_fmsg_item {
4491 struct list_head list;
4492 int attrtype;
4493 u8 nla_type;
4494 u16 len;
4495 int value[];
4496 };
4497
4498 struct devlink_fmsg {
4499 struct list_head item_list;
4500 bool putting_binary; /* This flag forces enclosing of binary data
4501 * in an array brackets. It forces using
4502 * of designated API:
4503 * devlink_fmsg_binary_pair_nest_start()
4504 * devlink_fmsg_binary_pair_nest_end()
4505 */
4506 };
4507
4508 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4509 {
4510 struct devlink_fmsg *fmsg;
4511
4512 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4513 if (!fmsg)
4514 return NULL;
4515
4516 INIT_LIST_HEAD(&fmsg->item_list);
4517
4518 return fmsg;
4519 }
4520
4521 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4522 {
4523 struct devlink_fmsg_item *item, *tmp;
4524
4525 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4526 list_del(&item->list);
4527 kfree(item);
4528 }
4529 kfree(fmsg);
4530 }
4531
4532 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4533 int attrtype)
4534 {
4535 struct devlink_fmsg_item *item;
4536
4537 item = kzalloc(sizeof(*item), GFP_KERNEL);
4538 if (!item)
4539 return -ENOMEM;
4540
4541 item->attrtype = attrtype;
4542 list_add_tail(&item->list, &fmsg->item_list);
4543
4544 return 0;
4545 }
4546
4547 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4548 {
4549 if (fmsg->putting_binary)
4550 return -EINVAL;
4551
4552 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4553 }
4554 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4555
4556 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4557 {
4558 if (fmsg->putting_binary)
4559 return -EINVAL;
4560
4561 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4562 }
4563
4564 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4565 {
4566 if (fmsg->putting_binary)
4567 return -EINVAL;
4568
4569 return devlink_fmsg_nest_end(fmsg);
4570 }
4571 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4572
4573 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4574
4575 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4576 {
4577 struct devlink_fmsg_item *item;
4578
4579 if (fmsg->putting_binary)
4580 return -EINVAL;
4581
4582 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4583 return -EMSGSIZE;
4584
4585 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4586 if (!item)
4587 return -ENOMEM;
4588
4589 item->nla_type = NLA_NUL_STRING;
4590 item->len = strlen(name) + 1;
4591 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4592 memcpy(&item->value, name, item->len);
4593 list_add_tail(&item->list, &fmsg->item_list);
4594
4595 return 0;
4596 }
4597
4598 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4599 {
4600 int err;
4601
4602 if (fmsg->putting_binary)
4603 return -EINVAL;
4604
4605 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4606 if (err)
4607 return err;
4608
4609 err = devlink_fmsg_put_name(fmsg, name);
4610 if (err)
4611 return err;
4612
4613 return 0;
4614 }
4615 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4616
4617 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4618 {
4619 if (fmsg->putting_binary)
4620 return -EINVAL;
4621
4622 return devlink_fmsg_nest_end(fmsg);
4623 }
4624 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4625
4626 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4627 const char *name)
4628 {
4629 int err;
4630
4631 if (fmsg->putting_binary)
4632 return -EINVAL;
4633
4634 err = devlink_fmsg_pair_nest_start(fmsg, name);
4635 if (err)
4636 return err;
4637
4638 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4639 if (err)
4640 return err;
4641
4642 return 0;
4643 }
4644 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4645
4646 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4647 {
4648 int err;
4649
4650 if (fmsg->putting_binary)
4651 return -EINVAL;
4652
4653 err = devlink_fmsg_nest_end(fmsg);
4654 if (err)
4655 return err;
4656
4657 err = devlink_fmsg_nest_end(fmsg);
4658 if (err)
4659 return err;
4660
4661 return 0;
4662 }
4663 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4664
4665 int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
4666 const char *name)
4667 {
4668 int err;
4669
4670 err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4671 if (err)
4672 return err;
4673
4674 fmsg->putting_binary = true;
4675 return err;
4676 }
4677 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
4678
4679 int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
4680 {
4681 if (!fmsg->putting_binary)
4682 return -EINVAL;
4683
4684 fmsg->putting_binary = false;
4685 return devlink_fmsg_arr_pair_nest_end(fmsg);
4686 }
4687 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
4688
4689 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4690 const void *value, u16 value_len,
4691 u8 value_nla_type)
4692 {
4693 struct devlink_fmsg_item *item;
4694
4695 if (value_len > DEVLINK_FMSG_MAX_SIZE)
4696 return -EMSGSIZE;
4697
4698 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4699 if (!item)
4700 return -ENOMEM;
4701
4702 item->nla_type = value_nla_type;
4703 item->len = value_len;
4704 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4705 memcpy(&item->value, value, item->len);
4706 list_add_tail(&item->list, &fmsg->item_list);
4707
4708 return 0;
4709 }
4710
4711 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4712 {
4713 if (fmsg->putting_binary)
4714 return -EINVAL;
4715
4716 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4717 }
4718 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4719
4720 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4721 {
4722 if (fmsg->putting_binary)
4723 return -EINVAL;
4724
4725 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4726 }
4727 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4728
4729 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4730 {
4731 if (fmsg->putting_binary)
4732 return -EINVAL;
4733
4734 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4735 }
4736 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4737
4738 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4739 {
4740 if (fmsg->putting_binary)
4741 return -EINVAL;
4742
4743 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4744 }
4745 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4746
4747 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4748 {
4749 if (fmsg->putting_binary)
4750 return -EINVAL;
4751
4752 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4753 NLA_NUL_STRING);
4754 }
4755 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4756
4757 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4758 u16 value_len)
4759 {
4760 if (!fmsg->putting_binary)
4761 return -EINVAL;
4762
4763 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4764 }
4765 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4766
4767 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4768 bool value)
4769 {
4770 int err;
4771
4772 err = devlink_fmsg_pair_nest_start(fmsg, name);
4773 if (err)
4774 return err;
4775
4776 err = devlink_fmsg_bool_put(fmsg, value);
4777 if (err)
4778 return err;
4779
4780 err = devlink_fmsg_pair_nest_end(fmsg);
4781 if (err)
4782 return err;
4783
4784 return 0;
4785 }
4786 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4787
4788 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4789 u8 value)
4790 {
4791 int err;
4792
4793 err = devlink_fmsg_pair_nest_start(fmsg, name);
4794 if (err)
4795 return err;
4796
4797 err = devlink_fmsg_u8_put(fmsg, value);
4798 if (err)
4799 return err;
4800
4801 err = devlink_fmsg_pair_nest_end(fmsg);
4802 if (err)
4803 return err;
4804
4805 return 0;
4806 }
4807 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4808
4809 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4810 u32 value)
4811 {
4812 int err;
4813
4814 err = devlink_fmsg_pair_nest_start(fmsg, name);
4815 if (err)
4816 return err;
4817
4818 err = devlink_fmsg_u32_put(fmsg, value);
4819 if (err)
4820 return err;
4821
4822 err = devlink_fmsg_pair_nest_end(fmsg);
4823 if (err)
4824 return err;
4825
4826 return 0;
4827 }
4828 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4829
4830 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4831 u64 value)
4832 {
4833 int err;
4834
4835 err = devlink_fmsg_pair_nest_start(fmsg, name);
4836 if (err)
4837 return err;
4838
4839 err = devlink_fmsg_u64_put(fmsg, value);
4840 if (err)
4841 return err;
4842
4843 err = devlink_fmsg_pair_nest_end(fmsg);
4844 if (err)
4845 return err;
4846
4847 return 0;
4848 }
4849 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4850
4851 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4852 const char *value)
4853 {
4854 int err;
4855
4856 err = devlink_fmsg_pair_nest_start(fmsg, name);
4857 if (err)
4858 return err;
4859
4860 err = devlink_fmsg_string_put(fmsg, value);
4861 if (err)
4862 return err;
4863
4864 err = devlink_fmsg_pair_nest_end(fmsg);
4865 if (err)
4866 return err;
4867
4868 return 0;
4869 }
4870 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4871
4872 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4873 const void *value, u32 value_len)
4874 {
4875 u32 data_size;
4876 int end_err;
4877 u32 offset;
4878 int err;
4879
4880 err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
4881 if (err)
4882 return err;
4883
4884 for (offset = 0; offset < value_len; offset += data_size) {
4885 data_size = value_len - offset;
4886 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4887 data_size = DEVLINK_FMSG_MAX_SIZE;
4888 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4889 if (err)
4890 break;
4891 /* Exit from loop with a break (instead of
4892 * return) to make sure putting_binary is turned off in
4893 * devlink_fmsg_binary_pair_nest_end
4894 */
4895 }
4896
4897 end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
4898 if (end_err)
4899 err = end_err;
4900
4901 return err;
4902 }
4903 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4904
4905 static int
4906 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4907 {
4908 switch (msg->nla_type) {
4909 case NLA_FLAG:
4910 case NLA_U8:
4911 case NLA_U32:
4912 case NLA_U64:
4913 case NLA_NUL_STRING:
4914 case NLA_BINARY:
4915 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4916 msg->nla_type);
4917 default:
4918 return -EINVAL;
4919 }
4920 }
4921
4922 static int
4923 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4924 {
4925 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4926 u8 tmp;
4927
4928 switch (msg->nla_type) {
4929 case NLA_FLAG:
4930 /* Always provide flag data, regardless of its value */
4931 tmp = *(bool *) msg->value;
4932
4933 return nla_put_u8(skb, attrtype, tmp);
4934 case NLA_U8:
4935 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4936 case NLA_U32:
4937 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4938 case NLA_U64:
4939 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4940 DEVLINK_ATTR_PAD);
4941 case NLA_NUL_STRING:
4942 return nla_put_string(skb, attrtype, (char *) &msg->value);
4943 case NLA_BINARY:
4944 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4945 default:
4946 return -EINVAL;
4947 }
4948 }
4949
4950 static int
4951 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4952 int *start)
4953 {
4954 struct devlink_fmsg_item *item;
4955 struct nlattr *fmsg_nlattr;
4956 int i = 0;
4957 int err;
4958
4959 fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4960 if (!fmsg_nlattr)
4961 return -EMSGSIZE;
4962
4963 list_for_each_entry(item, &fmsg->item_list, list) {
4964 if (i < *start) {
4965 i++;
4966 continue;
4967 }
4968
4969 switch (item->attrtype) {
4970 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4971 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4972 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4973 case DEVLINK_ATTR_FMSG_NEST_END:
4974 err = nla_put_flag(skb, item->attrtype);
4975 break;
4976 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4977 err = devlink_fmsg_item_fill_type(item, skb);
4978 if (err)
4979 break;
4980 err = devlink_fmsg_item_fill_data(item, skb);
4981 break;
4982 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4983 err = nla_put_string(skb, item->attrtype,
4984 (char *) &item->value);
4985 break;
4986 default:
4987 err = -EINVAL;
4988 break;
4989 }
4990 if (!err)
4991 *start = ++i;
4992 else
4993 break;
4994 }
4995
4996 nla_nest_end(skb, fmsg_nlattr);
4997 return err;
4998 }
4999
5000 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
5001 struct genl_info *info,
5002 enum devlink_command cmd, int flags)
5003 {
5004 struct nlmsghdr *nlh;
5005 struct sk_buff *skb;
5006 bool last = false;
5007 int index = 0;
5008 void *hdr;
5009 int err;
5010
5011 while (!last) {
5012 int tmp_index = index;
5013
5014 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5015 if (!skb)
5016 return -ENOMEM;
5017
5018 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
5019 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
5020 if (!hdr) {
5021 err = -EMSGSIZE;
5022 goto nla_put_failure;
5023 }
5024
5025 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5026 if (!err)
5027 last = true;
5028 else if (err != -EMSGSIZE || tmp_index == index)
5029 goto nla_put_failure;
5030
5031 genlmsg_end(skb, hdr);
5032 err = genlmsg_reply(skb, info);
5033 if (err)
5034 return err;
5035 }
5036
5037 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5038 if (!skb)
5039 return -ENOMEM;
5040 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
5041 NLMSG_DONE, 0, flags | NLM_F_MULTI);
5042 if (!nlh) {
5043 err = -EMSGSIZE;
5044 goto nla_put_failure;
5045 }
5046
5047 return genlmsg_reply(skb, info);
5048
5049 nla_put_failure:
5050 nlmsg_free(skb);
5051 return err;
5052 }
5053
5054 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5055 struct netlink_callback *cb,
5056 enum devlink_command cmd)
5057 {
5058 int index = cb->args[0];
5059 int tmp_index = index;
5060 void *hdr;
5061 int err;
5062
5063 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
5064 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
5065 if (!hdr) {
5066 err = -EMSGSIZE;
5067 goto nla_put_failure;
5068 }
5069
5070 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5071 if ((err && err != -EMSGSIZE) || tmp_index == index)
5072 goto nla_put_failure;
5073
5074 cb->args[0] = index;
5075 genlmsg_end(skb, hdr);
5076 return skb->len;
5077
5078 nla_put_failure:
5079 genlmsg_cancel(skb, hdr);
5080 return err;
5081 }
5082
5083 struct devlink_health_reporter {
5084 struct list_head list;
5085 void *priv;
5086 const struct devlink_health_reporter_ops *ops;
5087 struct devlink *devlink;
5088 struct devlink_fmsg *dump_fmsg;
5089 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
5090 u64 graceful_period;
5091 bool auto_recover;
5092 bool auto_dump;
5093 u8 health_state;
5094 u64 dump_ts;
5095 u64 dump_real_ts;
5096 u64 error_count;
5097 u64 recovery_count;
5098 u64 last_recovery_ts;
5099 refcount_t refcount;
5100 };
5101
5102 void *
5103 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
5104 {
5105 return reporter->priv;
5106 }
5107 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
5108
5109 static struct devlink_health_reporter *
5110 devlink_health_reporter_find_by_name(struct devlink *devlink,
5111 const char *reporter_name)
5112 {
5113 struct devlink_health_reporter *reporter;
5114
5115 lockdep_assert_held(&devlink->reporters_lock);
5116 list_for_each_entry(reporter, &devlink->reporter_list, list)
5117 if (!strcmp(reporter->ops->name, reporter_name))
5118 return reporter;
5119 return NULL;
5120 }
5121
5122 /**
5123 * devlink_health_reporter_create - create devlink health reporter
5124 *
5125 * @devlink: devlink
5126 * @ops: ops
5127 * @graceful_period: to avoid recovery loops, in msecs
5128 * @priv: priv
5129 */
5130 struct devlink_health_reporter *
5131 devlink_health_reporter_create(struct devlink *devlink,
5132 const struct devlink_health_reporter_ops *ops,
5133 u64 graceful_period, void *priv)
5134 {
5135 struct devlink_health_reporter *reporter;
5136
5137 mutex_lock(&devlink->reporters_lock);
5138 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
5139 reporter = ERR_PTR(-EEXIST);
5140 goto unlock;
5141 }
5142
5143 if (WARN_ON(graceful_period && !ops->recover)) {
5144 reporter = ERR_PTR(-EINVAL);
5145 goto unlock;
5146 }
5147
5148 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
5149 if (!reporter) {
5150 reporter = ERR_PTR(-ENOMEM);
5151 goto unlock;
5152 }
5153
5154 reporter->priv = priv;
5155 reporter->ops = ops;
5156 reporter->devlink = devlink;
5157 reporter->graceful_period = graceful_period;
5158 reporter->auto_recover = !!ops->recover;
5159 reporter->auto_dump = !!ops->dump;
5160 mutex_init(&reporter->dump_lock);
5161 refcount_set(&reporter->refcount, 1);
5162 list_add_tail(&reporter->list, &devlink->reporter_list);
5163 unlock:
5164 mutex_unlock(&devlink->reporters_lock);
5165 return reporter;
5166 }
5167 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
5168
5169 /**
5170 * devlink_health_reporter_destroy - destroy devlink health reporter
5171 *
5172 * @reporter: devlink health reporter to destroy
5173 */
5174 void
5175 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5176 {
5177 mutex_lock(&reporter->devlink->reporters_lock);
5178 list_del(&reporter->list);
5179 mutex_unlock(&reporter->devlink->reporters_lock);
5180 while (refcount_read(&reporter->refcount) > 1)
5181 msleep(100);
5182 mutex_destroy(&reporter->dump_lock);
5183 if (reporter->dump_fmsg)
5184 devlink_fmsg_free(reporter->dump_fmsg);
5185 kfree(reporter);
5186 }
5187 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
5188
5189 static int
5190 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5191 struct devlink *devlink,
5192 struct devlink_health_reporter *reporter,
5193 enum devlink_command cmd, u32 portid,
5194 u32 seq, int flags)
5195 {
5196 struct nlattr *reporter_attr;
5197 void *hdr;
5198
5199 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5200 if (!hdr)
5201 return -EMSGSIZE;
5202
5203 if (devlink_nl_put_handle(msg, devlink))
5204 goto genlmsg_cancel;
5205
5206 reporter_attr = nla_nest_start_noflag(msg,
5207 DEVLINK_ATTR_HEALTH_REPORTER);
5208 if (!reporter_attr)
5209 goto genlmsg_cancel;
5210 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5211 reporter->ops->name))
5212 goto reporter_nest_cancel;
5213 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5214 reporter->health_state))
5215 goto reporter_nest_cancel;
5216 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5217 reporter->error_count, DEVLINK_ATTR_PAD))
5218 goto reporter_nest_cancel;
5219 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5220 reporter->recovery_count, DEVLINK_ATTR_PAD))
5221 goto reporter_nest_cancel;
5222 if (reporter->ops->recover &&
5223 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5224 reporter->graceful_period,
5225 DEVLINK_ATTR_PAD))
5226 goto reporter_nest_cancel;
5227 if (reporter->ops->recover &&
5228 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5229 reporter->auto_recover))
5230 goto reporter_nest_cancel;
5231 if (reporter->dump_fmsg &&
5232 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5233 jiffies_to_msecs(reporter->dump_ts),
5234 DEVLINK_ATTR_PAD))
5235 goto reporter_nest_cancel;
5236 if (reporter->dump_fmsg &&
5237 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
5238 reporter->dump_real_ts, DEVLINK_ATTR_PAD))
5239 goto reporter_nest_cancel;
5240 if (reporter->ops->dump &&
5241 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
5242 reporter->auto_dump))
5243 goto reporter_nest_cancel;
5244
5245 nla_nest_end(msg, reporter_attr);
5246 genlmsg_end(msg, hdr);
5247 return 0;
5248
5249 reporter_nest_cancel:
5250 nla_nest_end(msg, reporter_attr);
5251 genlmsg_cancel:
5252 genlmsg_cancel(msg, hdr);
5253 return -EMSGSIZE;
5254 }
5255
5256 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
5257 enum devlink_command cmd)
5258 {
5259 struct sk_buff *msg;
5260 int err;
5261
5262 WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5263
5264 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5265 if (!msg)
5266 return;
5267
5268 err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
5269 reporter, cmd, 0, 0, 0);
5270 if (err) {
5271 nlmsg_free(msg);
5272 return;
5273 }
5274
5275 genlmsg_multicast_netns(&devlink_nl_family,
5276 devlink_net(reporter->devlink),
5277 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
5278 }
5279
5280 void
5281 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
5282 {
5283 reporter->recovery_count++;
5284 reporter->last_recovery_ts = jiffies;
5285 }
5286 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
5287
5288 static int
5289 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
5290 void *priv_ctx, struct netlink_ext_ack *extack)
5291 {
5292 int err;
5293
5294 if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
5295 return 0;
5296
5297 if (!reporter->ops->recover)
5298 return -EOPNOTSUPP;
5299
5300 err = reporter->ops->recover(reporter, priv_ctx, extack);
5301 if (err)
5302 return err;
5303
5304 devlink_health_reporter_recovery_done(reporter);
5305 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
5306 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5307
5308 return 0;
5309 }
5310
5311 static void
5312 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
5313 {
5314 if (!reporter->dump_fmsg)
5315 return;
5316 devlink_fmsg_free(reporter->dump_fmsg);
5317 reporter->dump_fmsg = NULL;
5318 }
5319
5320 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
5321 void *priv_ctx,
5322 struct netlink_ext_ack *extack)
5323 {
5324 int err;
5325
5326 if (!reporter->ops->dump)
5327 return 0;
5328
5329 if (reporter->dump_fmsg)
5330 return 0;
5331
5332 reporter->dump_fmsg = devlink_fmsg_alloc();
5333 if (!reporter->dump_fmsg) {
5334 err = -ENOMEM;
5335 return err;
5336 }
5337
5338 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
5339 if (err)
5340 goto dump_err;
5341
5342 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
5343 priv_ctx, extack);
5344 if (err)
5345 goto dump_err;
5346
5347 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
5348 if (err)
5349 goto dump_err;
5350
5351 reporter->dump_ts = jiffies;
5352 reporter->dump_real_ts = ktime_get_real_ns();
5353
5354 return 0;
5355
5356 dump_err:
5357 devlink_health_dump_clear(reporter);
5358 return err;
5359 }
5360
5361 int devlink_health_report(struct devlink_health_reporter *reporter,
5362 const char *msg, void *priv_ctx)
5363 {
5364 enum devlink_health_reporter_state prev_health_state;
5365 struct devlink *devlink = reporter->devlink;
5366
5367 /* write a log message of the current error */
5368 WARN_ON(!msg);
5369 trace_devlink_health_report(devlink, reporter->ops->name, msg);
5370 reporter->error_count++;
5371 prev_health_state = reporter->health_state;
5372 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5373 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5374
5375 /* abort if the previous error wasn't recovered */
5376 if (reporter->auto_recover &&
5377 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
5378 jiffies - reporter->last_recovery_ts <
5379 msecs_to_jiffies(reporter->graceful_period))) {
5380 trace_devlink_health_recover_aborted(devlink,
5381 reporter->ops->name,
5382 reporter->health_state,
5383 jiffies -
5384 reporter->last_recovery_ts);
5385 return -ECANCELED;
5386 }
5387
5388 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5389
5390 if (reporter->auto_dump) {
5391 mutex_lock(&reporter->dump_lock);
5392 /* store current dump of current error, for later analysis */
5393 devlink_health_do_dump(reporter, priv_ctx, NULL);
5394 mutex_unlock(&reporter->dump_lock);
5395 }
5396
5397 if (reporter->auto_recover)
5398 return devlink_health_reporter_recover(reporter,
5399 priv_ctx, NULL);
5400
5401 return 0;
5402 }
5403 EXPORT_SYMBOL_GPL(devlink_health_report);
5404
5405 static struct devlink_health_reporter *
5406 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
5407 struct nlattr **attrs)
5408 {
5409 struct devlink_health_reporter *reporter;
5410 char *reporter_name;
5411
5412 if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
5413 return NULL;
5414
5415 reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
5416 mutex_lock(&devlink->reporters_lock);
5417 reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
5418 if (reporter)
5419 refcount_inc(&reporter->refcount);
5420 mutex_unlock(&devlink->reporters_lock);
5421 return reporter;
5422 }
5423
5424 static struct devlink_health_reporter *
5425 devlink_health_reporter_get_from_info(struct devlink *devlink,
5426 struct genl_info *info)
5427 {
5428 return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
5429 }
5430
5431 static struct devlink_health_reporter *
5432 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
5433 {
5434 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5435 struct devlink_health_reporter *reporter;
5436 struct nlattr **attrs = info->attrs;
5437 struct devlink *devlink;
5438
5439 mutex_lock(&devlink_mutex);
5440 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5441 if (IS_ERR(devlink))
5442 goto unlock;
5443
5444 reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5445 mutex_unlock(&devlink_mutex);
5446 return reporter;
5447 unlock:
5448 mutex_unlock(&devlink_mutex);
5449 return NULL;
5450 }
5451
5452 static void
5453 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5454 {
5455 refcount_dec(&reporter->refcount);
5456 }
5457
5458 void
5459 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
5460 enum devlink_health_reporter_state state)
5461 {
5462 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
5463 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
5464 return;
5465
5466 if (reporter->health_state == state)
5467 return;
5468
5469 reporter->health_state = state;
5470 trace_devlink_health_reporter_state_update(reporter->devlink,
5471 reporter->ops->name, state);
5472 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5473 }
5474 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
5475
5476 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5477 struct genl_info *info)
5478 {
5479 struct devlink *devlink = info->user_ptr[0];
5480 struct devlink_health_reporter *reporter;
5481 struct sk_buff *msg;
5482 int err;
5483
5484 reporter = devlink_health_reporter_get_from_info(devlink, info);
5485 if (!reporter)
5486 return -EINVAL;
5487
5488 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5489 if (!msg) {
5490 err = -ENOMEM;
5491 goto out;
5492 }
5493
5494 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5495 DEVLINK_CMD_HEALTH_REPORTER_GET,
5496 info->snd_portid, info->snd_seq,
5497 0);
5498 if (err) {
5499 nlmsg_free(msg);
5500 goto out;
5501 }
5502
5503 err = genlmsg_reply(msg, info);
5504 out:
5505 devlink_health_reporter_put(reporter);
5506 return err;
5507 }
5508
5509 static int
5510 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5511 struct netlink_callback *cb)
5512 {
5513 struct devlink_health_reporter *reporter;
5514 struct devlink *devlink;
5515 int start = cb->args[0];
5516 int idx = 0;
5517 int err;
5518
5519 mutex_lock(&devlink_mutex);
5520 list_for_each_entry(devlink, &devlink_list, list) {
5521 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5522 continue;
5523 mutex_lock(&devlink->reporters_lock);
5524 list_for_each_entry(reporter, &devlink->reporter_list,
5525 list) {
5526 if (idx < start) {
5527 idx++;
5528 continue;
5529 }
5530 err = devlink_nl_health_reporter_fill(msg, devlink,
5531 reporter,
5532 DEVLINK_CMD_HEALTH_REPORTER_GET,
5533 NETLINK_CB(cb->skb).portid,
5534 cb->nlh->nlmsg_seq,
5535 NLM_F_MULTI);
5536 if (err) {
5537 mutex_unlock(&devlink->reporters_lock);
5538 goto out;
5539 }
5540 idx++;
5541 }
5542 mutex_unlock(&devlink->reporters_lock);
5543 }
5544 out:
5545 mutex_unlock(&devlink_mutex);
5546
5547 cb->args[0] = idx;
5548 return msg->len;
5549 }
5550
5551 static int
5552 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5553 struct genl_info *info)
5554 {
5555 struct devlink *devlink = info->user_ptr[0];
5556 struct devlink_health_reporter *reporter;
5557 int err;
5558
5559 reporter = devlink_health_reporter_get_from_info(devlink, info);
5560 if (!reporter)
5561 return -EINVAL;
5562
5563 if (!reporter->ops->recover &&
5564 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5565 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5566 err = -EOPNOTSUPP;
5567 goto out;
5568 }
5569 if (!reporter->ops->dump &&
5570 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
5571 err = -EOPNOTSUPP;
5572 goto out;
5573 }
5574
5575 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5576 reporter->graceful_period =
5577 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5578
5579 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5580 reporter->auto_recover =
5581 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5582
5583 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
5584 reporter->auto_dump =
5585 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
5586
5587 devlink_health_reporter_put(reporter);
5588 return 0;
5589 out:
5590 devlink_health_reporter_put(reporter);
5591 return err;
5592 }
5593
5594 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5595 struct genl_info *info)
5596 {
5597 struct devlink *devlink = info->user_ptr[0];
5598 struct devlink_health_reporter *reporter;
5599 int err;
5600
5601 reporter = devlink_health_reporter_get_from_info(devlink, info);
5602 if (!reporter)
5603 return -EINVAL;
5604
5605 err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5606
5607 devlink_health_reporter_put(reporter);
5608 return err;
5609 }
5610
5611 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5612 struct genl_info *info)
5613 {
5614 struct devlink *devlink = info->user_ptr[0];
5615 struct devlink_health_reporter *reporter;
5616 struct devlink_fmsg *fmsg;
5617 int err;
5618
5619 reporter = devlink_health_reporter_get_from_info(devlink, info);
5620 if (!reporter)
5621 return -EINVAL;
5622
5623 if (!reporter->ops->diagnose) {
5624 devlink_health_reporter_put(reporter);
5625 return -EOPNOTSUPP;
5626 }
5627
5628 fmsg = devlink_fmsg_alloc();
5629 if (!fmsg) {
5630 devlink_health_reporter_put(reporter);
5631 return -ENOMEM;
5632 }
5633
5634 err = devlink_fmsg_obj_nest_start(fmsg);
5635 if (err)
5636 goto out;
5637
5638 err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5639 if (err)
5640 goto out;
5641
5642 err = devlink_fmsg_obj_nest_end(fmsg);
5643 if (err)
5644 goto out;
5645
5646 err = devlink_fmsg_snd(fmsg, info,
5647 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5648
5649 out:
5650 devlink_fmsg_free(fmsg);
5651 devlink_health_reporter_put(reporter);
5652 return err;
5653 }
5654
5655 static int
5656 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5657 struct netlink_callback *cb)
5658 {
5659 struct devlink_health_reporter *reporter;
5660 u64 start = cb->args[0];
5661 int err;
5662
5663 reporter = devlink_health_reporter_get_from_cb(cb);
5664 if (!reporter)
5665 return -EINVAL;
5666
5667 if (!reporter->ops->dump) {
5668 err = -EOPNOTSUPP;
5669 goto out;
5670 }
5671 mutex_lock(&reporter->dump_lock);
5672 if (!start) {
5673 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5674 if (err)
5675 goto unlock;
5676 cb->args[1] = reporter->dump_ts;
5677 }
5678 if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5679 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5680 err = -EAGAIN;
5681 goto unlock;
5682 }
5683
5684 err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5685 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5686 unlock:
5687 mutex_unlock(&reporter->dump_lock);
5688 out:
5689 devlink_health_reporter_put(reporter);
5690 return err;
5691 }
5692
5693 static int
5694 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5695 struct genl_info *info)
5696 {
5697 struct devlink *devlink = info->user_ptr[0];
5698 struct devlink_health_reporter *reporter;
5699
5700 reporter = devlink_health_reporter_get_from_info(devlink, info);
5701 if (!reporter)
5702 return -EINVAL;
5703
5704 if (!reporter->ops->dump) {
5705 devlink_health_reporter_put(reporter);
5706 return -EOPNOTSUPP;
5707 }
5708
5709 mutex_lock(&reporter->dump_lock);
5710 devlink_health_dump_clear(reporter);
5711 mutex_unlock(&reporter->dump_lock);
5712 devlink_health_reporter_put(reporter);
5713 return 0;
5714 }
5715
5716 struct devlink_stats {
5717 u64 rx_bytes;
5718 u64 rx_packets;
5719 struct u64_stats_sync syncp;
5720 };
5721
5722 /**
5723 * struct devlink_trap_policer_item - Packet trap policer attributes.
5724 * @policer: Immutable packet trap policer attributes.
5725 * @rate: Rate in packets / sec.
5726 * @burst: Burst size in packets.
5727 * @list: trap_policer_list member.
5728 *
5729 * Describes packet trap policer attributes. Created by devlink during trap
5730 * policer registration.
5731 */
5732 struct devlink_trap_policer_item {
5733 const struct devlink_trap_policer *policer;
5734 u64 rate;
5735 u64 burst;
5736 struct list_head list;
5737 };
5738
5739 /**
5740 * struct devlink_trap_group_item - Packet trap group attributes.
5741 * @group: Immutable packet trap group attributes.
5742 * @policer_item: Associated policer item. Can be NULL.
5743 * @list: trap_group_list member.
5744 * @stats: Trap group statistics.
5745 *
5746 * Describes packet trap group attributes. Created by devlink during trap
5747 * group registration.
5748 */
5749 struct devlink_trap_group_item {
5750 const struct devlink_trap_group *group;
5751 struct devlink_trap_policer_item *policer_item;
5752 struct list_head list;
5753 struct devlink_stats __percpu *stats;
5754 };
5755
5756 /**
5757 * struct devlink_trap_item - Packet trap attributes.
5758 * @trap: Immutable packet trap attributes.
5759 * @group_item: Associated group item.
5760 * @list: trap_list member.
5761 * @action: Trap action.
5762 * @stats: Trap statistics.
5763 * @priv: Driver private information.
5764 *
5765 * Describes both mutable and immutable packet trap attributes. Created by
5766 * devlink during trap registration and used for all trap related operations.
5767 */
5768 struct devlink_trap_item {
5769 const struct devlink_trap *trap;
5770 struct devlink_trap_group_item *group_item;
5771 struct list_head list;
5772 enum devlink_trap_action action;
5773 struct devlink_stats __percpu *stats;
5774 void *priv;
5775 };
5776
5777 static struct devlink_trap_policer_item *
5778 devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
5779 {
5780 struct devlink_trap_policer_item *policer_item;
5781
5782 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
5783 if (policer_item->policer->id == id)
5784 return policer_item;
5785 }
5786
5787 return NULL;
5788 }
5789
5790 static struct devlink_trap_item *
5791 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5792 {
5793 struct devlink_trap_item *trap_item;
5794
5795 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5796 if (!strcmp(trap_item->trap->name, name))
5797 return trap_item;
5798 }
5799
5800 return NULL;
5801 }
5802
5803 static struct devlink_trap_item *
5804 devlink_trap_item_get_from_info(struct devlink *devlink,
5805 struct genl_info *info)
5806 {
5807 struct nlattr *attr;
5808
5809 if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5810 return NULL;
5811 attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5812
5813 return devlink_trap_item_lookup(devlink, nla_data(attr));
5814 }
5815
5816 static int
5817 devlink_trap_action_get_from_info(struct genl_info *info,
5818 enum devlink_trap_action *p_trap_action)
5819 {
5820 u8 val;
5821
5822 val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5823 switch (val) {
5824 case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5825 case DEVLINK_TRAP_ACTION_TRAP:
5826 *p_trap_action = val;
5827 break;
5828 default:
5829 return -EINVAL;
5830 }
5831
5832 return 0;
5833 }
5834
5835 static int devlink_trap_metadata_put(struct sk_buff *msg,
5836 const struct devlink_trap *trap)
5837 {
5838 struct nlattr *attr;
5839
5840 attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5841 if (!attr)
5842 return -EMSGSIZE;
5843
5844 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5845 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5846 goto nla_put_failure;
5847 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
5848 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
5849 goto nla_put_failure;
5850
5851 nla_nest_end(msg, attr);
5852
5853 return 0;
5854
5855 nla_put_failure:
5856 nla_nest_cancel(msg, attr);
5857 return -EMSGSIZE;
5858 }
5859
5860 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5861 struct devlink_stats *stats)
5862 {
5863 int i;
5864
5865 memset(stats, 0, sizeof(*stats));
5866 for_each_possible_cpu(i) {
5867 struct devlink_stats *cpu_stats;
5868 u64 rx_packets, rx_bytes;
5869 unsigned int start;
5870
5871 cpu_stats = per_cpu_ptr(trap_stats, i);
5872 do {
5873 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5874 rx_packets = cpu_stats->rx_packets;
5875 rx_bytes = cpu_stats->rx_bytes;
5876 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5877
5878 stats->rx_packets += rx_packets;
5879 stats->rx_bytes += rx_bytes;
5880 }
5881 }
5882
5883 static int devlink_trap_stats_put(struct sk_buff *msg,
5884 struct devlink_stats __percpu *trap_stats)
5885 {
5886 struct devlink_stats stats;
5887 struct nlattr *attr;
5888
5889 devlink_trap_stats_read(trap_stats, &stats);
5890
5891 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5892 if (!attr)
5893 return -EMSGSIZE;
5894
5895 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5896 stats.rx_packets, DEVLINK_ATTR_PAD))
5897 goto nla_put_failure;
5898
5899 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5900 stats.rx_bytes, DEVLINK_ATTR_PAD))
5901 goto nla_put_failure;
5902
5903 nla_nest_end(msg, attr);
5904
5905 return 0;
5906
5907 nla_put_failure:
5908 nla_nest_cancel(msg, attr);
5909 return -EMSGSIZE;
5910 }
5911
5912 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5913 const struct devlink_trap_item *trap_item,
5914 enum devlink_command cmd, u32 portid, u32 seq,
5915 int flags)
5916 {
5917 struct devlink_trap_group_item *group_item = trap_item->group_item;
5918 void *hdr;
5919 int err;
5920
5921 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5922 if (!hdr)
5923 return -EMSGSIZE;
5924
5925 if (devlink_nl_put_handle(msg, devlink))
5926 goto nla_put_failure;
5927
5928 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5929 group_item->group->name))
5930 goto nla_put_failure;
5931
5932 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5933 goto nla_put_failure;
5934
5935 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5936 goto nla_put_failure;
5937
5938 if (trap_item->trap->generic &&
5939 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5940 goto nla_put_failure;
5941
5942 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5943 goto nla_put_failure;
5944
5945 err = devlink_trap_metadata_put(msg, trap_item->trap);
5946 if (err)
5947 goto nla_put_failure;
5948
5949 err = devlink_trap_stats_put(msg, trap_item->stats);
5950 if (err)
5951 goto nla_put_failure;
5952
5953 genlmsg_end(msg, hdr);
5954
5955 return 0;
5956
5957 nla_put_failure:
5958 genlmsg_cancel(msg, hdr);
5959 return -EMSGSIZE;
5960 }
5961
5962 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5963 struct genl_info *info)
5964 {
5965 struct netlink_ext_ack *extack = info->extack;
5966 struct devlink *devlink = info->user_ptr[0];
5967 struct devlink_trap_item *trap_item;
5968 struct sk_buff *msg;
5969 int err;
5970
5971 if (list_empty(&devlink->trap_list))
5972 return -EOPNOTSUPP;
5973
5974 trap_item = devlink_trap_item_get_from_info(devlink, info);
5975 if (!trap_item) {
5976 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5977 return -ENOENT;
5978 }
5979
5980 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5981 if (!msg)
5982 return -ENOMEM;
5983
5984 err = devlink_nl_trap_fill(msg, devlink, trap_item,
5985 DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5986 info->snd_seq, 0);
5987 if (err)
5988 goto err_trap_fill;
5989
5990 return genlmsg_reply(msg, info);
5991
5992 err_trap_fill:
5993 nlmsg_free(msg);
5994 return err;
5995 }
5996
5997 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5998 struct netlink_callback *cb)
5999 {
6000 struct devlink_trap_item *trap_item;
6001 struct devlink *devlink;
6002 int start = cb->args[0];
6003 int idx = 0;
6004 int err;
6005
6006 mutex_lock(&devlink_mutex);
6007 list_for_each_entry(devlink, &devlink_list, list) {
6008 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6009 continue;
6010 mutex_lock(&devlink->lock);
6011 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6012 if (idx < start) {
6013 idx++;
6014 continue;
6015 }
6016 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6017 DEVLINK_CMD_TRAP_NEW,
6018 NETLINK_CB(cb->skb).portid,
6019 cb->nlh->nlmsg_seq,
6020 NLM_F_MULTI);
6021 if (err) {
6022 mutex_unlock(&devlink->lock);
6023 goto out;
6024 }
6025 idx++;
6026 }
6027 mutex_unlock(&devlink->lock);
6028 }
6029 out:
6030 mutex_unlock(&devlink_mutex);
6031
6032 cb->args[0] = idx;
6033 return msg->len;
6034 }
6035
6036 static int __devlink_trap_action_set(struct devlink *devlink,
6037 struct devlink_trap_item *trap_item,
6038 enum devlink_trap_action trap_action,
6039 struct netlink_ext_ack *extack)
6040 {
6041 int err;
6042
6043 if (trap_item->action != trap_action &&
6044 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
6045 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
6046 return 0;
6047 }
6048
6049 err = devlink->ops->trap_action_set(devlink, trap_item->trap,
6050 trap_action);
6051 if (err)
6052 return err;
6053
6054 trap_item->action = trap_action;
6055
6056 return 0;
6057 }
6058
6059 static int devlink_trap_action_set(struct devlink *devlink,
6060 struct devlink_trap_item *trap_item,
6061 struct genl_info *info)
6062 {
6063 enum devlink_trap_action trap_action;
6064 int err;
6065
6066 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6067 return 0;
6068
6069 err = devlink_trap_action_get_from_info(info, &trap_action);
6070 if (err) {
6071 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6072 return -EINVAL;
6073 }
6074
6075 return __devlink_trap_action_set(devlink, trap_item, trap_action,
6076 info->extack);
6077 }
6078
6079 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
6080 struct genl_info *info)
6081 {
6082 struct netlink_ext_ack *extack = info->extack;
6083 struct devlink *devlink = info->user_ptr[0];
6084 struct devlink_trap_item *trap_item;
6085 int err;
6086
6087 if (list_empty(&devlink->trap_list))
6088 return -EOPNOTSUPP;
6089
6090 trap_item = devlink_trap_item_get_from_info(devlink, info);
6091 if (!trap_item) {
6092 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6093 return -ENOENT;
6094 }
6095
6096 err = devlink_trap_action_set(devlink, trap_item, info);
6097 if (err)
6098 return err;
6099
6100 return 0;
6101 }
6102
6103 static struct devlink_trap_group_item *
6104 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
6105 {
6106 struct devlink_trap_group_item *group_item;
6107
6108 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6109 if (!strcmp(group_item->group->name, name))
6110 return group_item;
6111 }
6112
6113 return NULL;
6114 }
6115
6116 static struct devlink_trap_group_item *
6117 devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
6118 {
6119 struct devlink_trap_group_item *group_item;
6120
6121 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6122 if (group_item->group->id == id)
6123 return group_item;
6124 }
6125
6126 return NULL;
6127 }
6128
6129 static struct devlink_trap_group_item *
6130 devlink_trap_group_item_get_from_info(struct devlink *devlink,
6131 struct genl_info *info)
6132 {
6133 char *name;
6134
6135 if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
6136 return NULL;
6137 name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
6138
6139 return devlink_trap_group_item_lookup(devlink, name);
6140 }
6141
6142 static int
6143 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
6144 const struct devlink_trap_group_item *group_item,
6145 enum devlink_command cmd, u32 portid, u32 seq,
6146 int flags)
6147 {
6148 void *hdr;
6149 int err;
6150
6151 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6152 if (!hdr)
6153 return -EMSGSIZE;
6154
6155 if (devlink_nl_put_handle(msg, devlink))
6156 goto nla_put_failure;
6157
6158 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
6159 group_item->group->name))
6160 goto nla_put_failure;
6161
6162 if (group_item->group->generic &&
6163 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
6164 goto nla_put_failure;
6165
6166 if (group_item->policer_item &&
6167 nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6168 group_item->policer_item->policer->id))
6169 goto nla_put_failure;
6170
6171 err = devlink_trap_stats_put(msg, group_item->stats);
6172 if (err)
6173 goto nla_put_failure;
6174
6175 genlmsg_end(msg, hdr);
6176
6177 return 0;
6178
6179 nla_put_failure:
6180 genlmsg_cancel(msg, hdr);
6181 return -EMSGSIZE;
6182 }
6183
6184 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
6185 struct genl_info *info)
6186 {
6187 struct netlink_ext_ack *extack = info->extack;
6188 struct devlink *devlink = info->user_ptr[0];
6189 struct devlink_trap_group_item *group_item;
6190 struct sk_buff *msg;
6191 int err;
6192
6193 if (list_empty(&devlink->trap_group_list))
6194 return -EOPNOTSUPP;
6195
6196 group_item = devlink_trap_group_item_get_from_info(devlink, info);
6197 if (!group_item) {
6198 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6199 return -ENOENT;
6200 }
6201
6202 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6203 if (!msg)
6204 return -ENOMEM;
6205
6206 err = devlink_nl_trap_group_fill(msg, devlink, group_item,
6207 DEVLINK_CMD_TRAP_GROUP_NEW,
6208 info->snd_portid, info->snd_seq, 0);
6209 if (err)
6210 goto err_trap_group_fill;
6211
6212 return genlmsg_reply(msg, info);
6213
6214 err_trap_group_fill:
6215 nlmsg_free(msg);
6216 return err;
6217 }
6218
6219 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
6220 struct netlink_callback *cb)
6221 {
6222 enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
6223 struct devlink_trap_group_item *group_item;
6224 u32 portid = NETLINK_CB(cb->skb).portid;
6225 struct devlink *devlink;
6226 int start = cb->args[0];
6227 int idx = 0;
6228 int err;
6229
6230 mutex_lock(&devlink_mutex);
6231 list_for_each_entry(devlink, &devlink_list, list) {
6232 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6233 continue;
6234 mutex_lock(&devlink->lock);
6235 list_for_each_entry(group_item, &devlink->trap_group_list,
6236 list) {
6237 if (idx < start) {
6238 idx++;
6239 continue;
6240 }
6241 err = devlink_nl_trap_group_fill(msg, devlink,
6242 group_item, cmd,
6243 portid,
6244 cb->nlh->nlmsg_seq,
6245 NLM_F_MULTI);
6246 if (err) {
6247 mutex_unlock(&devlink->lock);
6248 goto out;
6249 }
6250 idx++;
6251 }
6252 mutex_unlock(&devlink->lock);
6253 }
6254 out:
6255 mutex_unlock(&devlink_mutex);
6256
6257 cb->args[0] = idx;
6258 return msg->len;
6259 }
6260
6261 static int
6262 __devlink_trap_group_action_set(struct devlink *devlink,
6263 struct devlink_trap_group_item *group_item,
6264 enum devlink_trap_action trap_action,
6265 struct netlink_ext_ack *extack)
6266 {
6267 const char *group_name = group_item->group->name;
6268 struct devlink_trap_item *trap_item;
6269 int err;
6270
6271 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6272 if (strcmp(trap_item->group_item->group->name, group_name))
6273 continue;
6274 err = __devlink_trap_action_set(devlink, trap_item,
6275 trap_action, extack);
6276 if (err)
6277 return err;
6278 }
6279
6280 return 0;
6281 }
6282
6283 static int
6284 devlink_trap_group_action_set(struct devlink *devlink,
6285 struct devlink_trap_group_item *group_item,
6286 struct genl_info *info, bool *p_modified)
6287 {
6288 enum devlink_trap_action trap_action;
6289 int err;
6290
6291 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6292 return 0;
6293
6294 err = devlink_trap_action_get_from_info(info, &trap_action);
6295 if (err) {
6296 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6297 return -EINVAL;
6298 }
6299
6300 err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
6301 info->extack);
6302 if (err)
6303 return err;
6304
6305 *p_modified = true;
6306
6307 return 0;
6308 }
6309
6310 static int devlink_trap_group_set(struct devlink *devlink,
6311 struct devlink_trap_group_item *group_item,
6312 struct genl_info *info)
6313 {
6314 struct devlink_trap_policer_item *policer_item;
6315 struct netlink_ext_ack *extack = info->extack;
6316 const struct devlink_trap_policer *policer;
6317 struct nlattr **attrs = info->attrs;
6318 int err;
6319
6320 if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6321 return 0;
6322
6323 if (!devlink->ops->trap_group_set)
6324 return -EOPNOTSUPP;
6325
6326 policer_item = group_item->policer_item;
6327 if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) {
6328 u32 policer_id;
6329
6330 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6331 policer_item = devlink_trap_policer_item_lookup(devlink,
6332 policer_id);
6333 if (policer_id && !policer_item) {
6334 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6335 return -ENOENT;
6336 }
6337 }
6338 policer = policer_item ? policer_item->policer : NULL;
6339
6340 err = devlink->ops->trap_group_set(devlink, group_item->group, policer);
6341 if (err)
6342 return err;
6343
6344 group_item->policer_item = policer_item;
6345
6346 return 0;
6347 }
6348
6349 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
6350 struct genl_info *info)
6351 {
6352 struct netlink_ext_ack *extack = info->extack;
6353 struct devlink *devlink = info->user_ptr[0];
6354 struct devlink_trap_group_item *group_item;
6355 bool modified = false;
6356 int err;
6357
6358 if (list_empty(&devlink->trap_group_list))
6359 return -EOPNOTSUPP;
6360
6361 group_item = devlink_trap_group_item_get_from_info(devlink, info);
6362 if (!group_item) {
6363 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6364 return -ENOENT;
6365 }
6366
6367 err = devlink_trap_group_action_set(devlink, group_item, info,
6368 &modified);
6369 if (err)
6370 return err;
6371
6372 err = devlink_trap_group_set(devlink, group_item, info);
6373 if (err)
6374 goto err_trap_group_set;
6375
6376 return 0;
6377
6378 err_trap_group_set:
6379 if (modified)
6380 NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
6381 return err;
6382 }
6383
6384 static struct devlink_trap_policer_item *
6385 devlink_trap_policer_item_get_from_info(struct devlink *devlink,
6386 struct genl_info *info)
6387 {
6388 u32 id;
6389
6390 if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6391 return NULL;
6392 id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6393
6394 return devlink_trap_policer_item_lookup(devlink, id);
6395 }
6396
6397 static int
6398 devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
6399 const struct devlink_trap_policer *policer)
6400 {
6401 struct nlattr *attr;
6402 u64 drops;
6403 int err;
6404
6405 if (!devlink->ops->trap_policer_counter_get)
6406 return 0;
6407
6408 err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
6409 if (err)
6410 return err;
6411
6412 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
6413 if (!attr)
6414 return -EMSGSIZE;
6415
6416 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
6417 DEVLINK_ATTR_PAD))
6418 goto nla_put_failure;
6419
6420 nla_nest_end(msg, attr);
6421
6422 return 0;
6423
6424 nla_put_failure:
6425 nla_nest_cancel(msg, attr);
6426 return -EMSGSIZE;
6427 }
6428
6429 static int
6430 devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
6431 const struct devlink_trap_policer_item *policer_item,
6432 enum devlink_command cmd, u32 portid, u32 seq,
6433 int flags)
6434 {
6435 void *hdr;
6436 int err;
6437
6438 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6439 if (!hdr)
6440 return -EMSGSIZE;
6441
6442 if (devlink_nl_put_handle(msg, devlink))
6443 goto nla_put_failure;
6444
6445 if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6446 policer_item->policer->id))
6447 goto nla_put_failure;
6448
6449 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
6450 policer_item->rate, DEVLINK_ATTR_PAD))
6451 goto nla_put_failure;
6452
6453 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
6454 policer_item->burst, DEVLINK_ATTR_PAD))
6455 goto nla_put_failure;
6456
6457 err = devlink_trap_policer_stats_put(msg, devlink,
6458 policer_item->policer);
6459 if (err)
6460 goto nla_put_failure;
6461
6462 genlmsg_end(msg, hdr);
6463
6464 return 0;
6465
6466 nla_put_failure:
6467 genlmsg_cancel(msg, hdr);
6468 return -EMSGSIZE;
6469 }
6470
6471 static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
6472 struct genl_info *info)
6473 {
6474 struct devlink_trap_policer_item *policer_item;
6475 struct netlink_ext_ack *extack = info->extack;
6476 struct devlink *devlink = info->user_ptr[0];
6477 struct sk_buff *msg;
6478 int err;
6479
6480 if (list_empty(&devlink->trap_policer_list))
6481 return -EOPNOTSUPP;
6482
6483 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6484 if (!policer_item) {
6485 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6486 return -ENOENT;
6487 }
6488
6489 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6490 if (!msg)
6491 return -ENOMEM;
6492
6493 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
6494 DEVLINK_CMD_TRAP_POLICER_NEW,
6495 info->snd_portid, info->snd_seq, 0);
6496 if (err)
6497 goto err_trap_policer_fill;
6498
6499 return genlmsg_reply(msg, info);
6500
6501 err_trap_policer_fill:
6502 nlmsg_free(msg);
6503 return err;
6504 }
6505
6506 static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
6507 struct netlink_callback *cb)
6508 {
6509 enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
6510 struct devlink_trap_policer_item *policer_item;
6511 u32 portid = NETLINK_CB(cb->skb).portid;
6512 struct devlink *devlink;
6513 int start = cb->args[0];
6514 int idx = 0;
6515 int err;
6516
6517 mutex_lock(&devlink_mutex);
6518 list_for_each_entry(devlink, &devlink_list, list) {
6519 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6520 continue;
6521 mutex_lock(&devlink->lock);
6522 list_for_each_entry(policer_item, &devlink->trap_policer_list,
6523 list) {
6524 if (idx < start) {
6525 idx++;
6526 continue;
6527 }
6528 err = devlink_nl_trap_policer_fill(msg, devlink,
6529 policer_item, cmd,
6530 portid,
6531 cb->nlh->nlmsg_seq,
6532 NLM_F_MULTI);
6533 if (err) {
6534 mutex_unlock(&devlink->lock);
6535 goto out;
6536 }
6537 idx++;
6538 }
6539 mutex_unlock(&devlink->lock);
6540 }
6541 out:
6542 mutex_unlock(&devlink_mutex);
6543
6544 cb->args[0] = idx;
6545 return msg->len;
6546 }
6547
6548 static int
6549 devlink_trap_policer_set(struct devlink *devlink,
6550 struct devlink_trap_policer_item *policer_item,
6551 struct genl_info *info)
6552 {
6553 struct netlink_ext_ack *extack = info->extack;
6554 struct nlattr **attrs = info->attrs;
6555 u64 rate, burst;
6556 int err;
6557
6558 rate = policer_item->rate;
6559 burst = policer_item->burst;
6560
6561 if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
6562 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
6563
6564 if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
6565 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
6566
6567 if (rate < policer_item->policer->min_rate) {
6568 NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
6569 return -EINVAL;
6570 }
6571
6572 if (rate > policer_item->policer->max_rate) {
6573 NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
6574 return -EINVAL;
6575 }
6576
6577 if (burst < policer_item->policer->min_burst) {
6578 NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
6579 return -EINVAL;
6580 }
6581
6582 if (burst > policer_item->policer->max_burst) {
6583 NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
6584 return -EINVAL;
6585 }
6586
6587 err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
6588 rate, burst, info->extack);
6589 if (err)
6590 return err;
6591
6592 policer_item->rate = rate;
6593 policer_item->burst = burst;
6594
6595 return 0;
6596 }
6597
6598 static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
6599 struct genl_info *info)
6600 {
6601 struct devlink_trap_policer_item *policer_item;
6602 struct netlink_ext_ack *extack = info->extack;
6603 struct devlink *devlink = info->user_ptr[0];
6604
6605 if (list_empty(&devlink->trap_policer_list))
6606 return -EOPNOTSUPP;
6607
6608 if (!devlink->ops->trap_policer_set)
6609 return -EOPNOTSUPP;
6610
6611 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6612 if (!policer_item) {
6613 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6614 return -ENOENT;
6615 }
6616
6617 return devlink_trap_policer_set(devlink, policer_item, info);
6618 }
6619
6620 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
6621 [DEVLINK_ATTR_UNSPEC] = { .strict_start_type =
6622 DEVLINK_ATTR_TRAP_POLICER_ID },
6623 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
6624 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
6625 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
6626 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
6627 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
6628 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
6629 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
6630 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
6631 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
6632 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
6633 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
6634 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
6635 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
6636 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
6637 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
6638 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
6639 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
6640 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
6641 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
6642 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
6643 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
6644 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
6645 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
6646 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
6647 [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
6648 [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
6649 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
6650 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
6651 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
6652 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
6653 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
6654 [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
6655 [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
6656 [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
6657 [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
6658 [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
6659 [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
6660 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },
6661 [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
6662 [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
6663 [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
6664 };
6665
6666 static const struct genl_ops devlink_nl_ops[] = {
6667 {
6668 .cmd = DEVLINK_CMD_GET,
6669 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6670 .doit = devlink_nl_cmd_get_doit,
6671 .dumpit = devlink_nl_cmd_get_dumpit,
6672 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6673 /* can be retrieved by unprivileged users */
6674 },
6675 {
6676 .cmd = DEVLINK_CMD_PORT_GET,
6677 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6678 .doit = devlink_nl_cmd_port_get_doit,
6679 .dumpit = devlink_nl_cmd_port_get_dumpit,
6680 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6681 /* can be retrieved by unprivileged users */
6682 },
6683 {
6684 .cmd = DEVLINK_CMD_PORT_SET,
6685 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6686 .doit = devlink_nl_cmd_port_set_doit,
6687 .flags = GENL_ADMIN_PERM,
6688 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6689 },
6690 {
6691 .cmd = DEVLINK_CMD_PORT_SPLIT,
6692 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6693 .doit = devlink_nl_cmd_port_split_doit,
6694 .flags = GENL_ADMIN_PERM,
6695 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6696 DEVLINK_NL_FLAG_NO_LOCK,
6697 },
6698 {
6699 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
6700 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6701 .doit = devlink_nl_cmd_port_unsplit_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_SB_GET,
6708 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6709 .doit = devlink_nl_cmd_sb_get_doit,
6710 .dumpit = devlink_nl_cmd_sb_get_dumpit,
6711 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6712 DEVLINK_NL_FLAG_NEED_SB,
6713 /* can be retrieved by unprivileged users */
6714 },
6715 {
6716 .cmd = DEVLINK_CMD_SB_POOL_GET,
6717 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6718 .doit = devlink_nl_cmd_sb_pool_get_doit,
6719 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
6720 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6721 DEVLINK_NL_FLAG_NEED_SB,
6722 /* can be retrieved by unprivileged users */
6723 },
6724 {
6725 .cmd = DEVLINK_CMD_SB_POOL_SET,
6726 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6727 .doit = devlink_nl_cmd_sb_pool_set_doit,
6728 .flags = GENL_ADMIN_PERM,
6729 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6730 DEVLINK_NL_FLAG_NEED_SB,
6731 },
6732 {
6733 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
6734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6735 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
6736 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
6737 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6738 DEVLINK_NL_FLAG_NEED_SB,
6739 /* can be retrieved by unprivileged users */
6740 },
6741 {
6742 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
6743 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6744 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
6745 .flags = GENL_ADMIN_PERM,
6746 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6747 DEVLINK_NL_FLAG_NEED_SB,
6748 },
6749 {
6750 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6751 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6752 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6753 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6754 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6755 DEVLINK_NL_FLAG_NEED_SB,
6756 /* can be retrieved by unprivileged users */
6757 },
6758 {
6759 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6760 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6761 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6762 .flags = GENL_ADMIN_PERM,
6763 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6764 DEVLINK_NL_FLAG_NEED_SB,
6765 },
6766 {
6767 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6768 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6769 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6770 .flags = GENL_ADMIN_PERM,
6771 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6772 DEVLINK_NL_FLAG_NEED_SB,
6773 },
6774 {
6775 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6776 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6777 .doit = devlink_nl_cmd_sb_occ_max_clear_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_ESWITCH_GET,
6784 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6785 .doit = devlink_nl_cmd_eswitch_get_doit,
6786 .flags = GENL_ADMIN_PERM,
6787 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6788 DEVLINK_NL_FLAG_NO_LOCK,
6789 },
6790 {
6791 .cmd = DEVLINK_CMD_ESWITCH_SET,
6792 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6793 .doit = devlink_nl_cmd_eswitch_set_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_DPIPE_TABLE_GET,
6800 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6801 .doit = devlink_nl_cmd_dpipe_table_get,
6802 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6803 /* can be retrieved by unprivileged users */
6804 },
6805 {
6806 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6807 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6808 .doit = devlink_nl_cmd_dpipe_entries_get,
6809 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6810 /* can be retrieved by unprivileged users */
6811 },
6812 {
6813 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6814 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6815 .doit = devlink_nl_cmd_dpipe_headers_get,
6816 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6817 /* can be retrieved by unprivileged users */
6818 },
6819 {
6820 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6821 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6822 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6823 .flags = GENL_ADMIN_PERM,
6824 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6825 },
6826 {
6827 .cmd = DEVLINK_CMD_RESOURCE_SET,
6828 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6829 .doit = devlink_nl_cmd_resource_set,
6830 .flags = GENL_ADMIN_PERM,
6831 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6832 },
6833 {
6834 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6835 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6836 .doit = devlink_nl_cmd_resource_dump,
6837 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6838 /* can be retrieved by unprivileged users */
6839 },
6840 {
6841 .cmd = DEVLINK_CMD_RELOAD,
6842 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6843 .doit = devlink_nl_cmd_reload,
6844 .flags = GENL_ADMIN_PERM,
6845 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6846 DEVLINK_NL_FLAG_NO_LOCK,
6847 },
6848 {
6849 .cmd = DEVLINK_CMD_PARAM_GET,
6850 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6851 .doit = devlink_nl_cmd_param_get_doit,
6852 .dumpit = devlink_nl_cmd_param_get_dumpit,
6853 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6854 /* can be retrieved by unprivileged users */
6855 },
6856 {
6857 .cmd = DEVLINK_CMD_PARAM_SET,
6858 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6859 .doit = devlink_nl_cmd_param_set_doit,
6860 .flags = GENL_ADMIN_PERM,
6861 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6862 },
6863 {
6864 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6865 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6866 .doit = devlink_nl_cmd_port_param_get_doit,
6867 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6868 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6869 /* can be retrieved by unprivileged users */
6870 },
6871 {
6872 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6873 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6874 .doit = devlink_nl_cmd_port_param_set_doit,
6875 .flags = GENL_ADMIN_PERM,
6876 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6877 },
6878 {
6879 .cmd = DEVLINK_CMD_REGION_GET,
6880 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6881 .doit = devlink_nl_cmd_region_get_doit,
6882 .dumpit = devlink_nl_cmd_region_get_dumpit,
6883 .flags = GENL_ADMIN_PERM,
6884 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6885 },
6886 {
6887 .cmd = DEVLINK_CMD_REGION_NEW,
6888 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6889 .doit = devlink_nl_cmd_region_new,
6890 .flags = GENL_ADMIN_PERM,
6891 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6892 },
6893 {
6894 .cmd = DEVLINK_CMD_REGION_DEL,
6895 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6896 .doit = devlink_nl_cmd_region_del,
6897 .flags = GENL_ADMIN_PERM,
6898 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6899 },
6900 {
6901 .cmd = DEVLINK_CMD_REGION_READ,
6902 .validate = GENL_DONT_VALIDATE_STRICT |
6903 GENL_DONT_VALIDATE_DUMP_STRICT,
6904 .dumpit = devlink_nl_cmd_region_read_dumpit,
6905 .flags = GENL_ADMIN_PERM,
6906 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6907 },
6908 {
6909 .cmd = DEVLINK_CMD_INFO_GET,
6910 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6911 .doit = devlink_nl_cmd_info_get_doit,
6912 .dumpit = devlink_nl_cmd_info_get_dumpit,
6913 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6914 /* can be retrieved by unprivileged users */
6915 },
6916 {
6917 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6918 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6919 .doit = devlink_nl_cmd_health_reporter_get_doit,
6920 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6921 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6922 DEVLINK_NL_FLAG_NO_LOCK,
6923 /* can be retrieved by unprivileged users */
6924 },
6925 {
6926 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6927 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6928 .doit = devlink_nl_cmd_health_reporter_set_doit,
6929 .flags = GENL_ADMIN_PERM,
6930 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6931 DEVLINK_NL_FLAG_NO_LOCK,
6932 },
6933 {
6934 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6935 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6936 .doit = devlink_nl_cmd_health_reporter_recover_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_DIAGNOSE,
6943 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6944 .doit = devlink_nl_cmd_health_reporter_diagnose_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_DUMP_GET,
6951 .validate = GENL_DONT_VALIDATE_STRICT |
6952 GENL_DONT_VALIDATE_DUMP_STRICT,
6953 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6954 .flags = GENL_ADMIN_PERM,
6955 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6956 DEVLINK_NL_FLAG_NO_LOCK,
6957 },
6958 {
6959 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6960 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6961 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
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_FLASH_UPDATE,
6968 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6969 .doit = devlink_nl_cmd_flash_update,
6970 .flags = GENL_ADMIN_PERM,
6971 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6972 },
6973 {
6974 .cmd = DEVLINK_CMD_TRAP_GET,
6975 .doit = devlink_nl_cmd_trap_get_doit,
6976 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6977 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6978 /* can be retrieved by unprivileged users */
6979 },
6980 {
6981 .cmd = DEVLINK_CMD_TRAP_SET,
6982 .doit = devlink_nl_cmd_trap_set_doit,
6983 .flags = GENL_ADMIN_PERM,
6984 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6985 },
6986 {
6987 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6988 .doit = devlink_nl_cmd_trap_group_get_doit,
6989 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6990 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6991 /* can be retrieved by unprivileged users */
6992 },
6993 {
6994 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6995 .doit = devlink_nl_cmd_trap_group_set_doit,
6996 .flags = GENL_ADMIN_PERM,
6997 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6998 },
6999 {
7000 .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
7001 .doit = devlink_nl_cmd_trap_policer_get_doit,
7002 .dumpit = devlink_nl_cmd_trap_policer_get_dumpit,
7003 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7004 /* can be retrieved by unprivileged users */
7005 },
7006 {
7007 .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
7008 .doit = devlink_nl_cmd_trap_policer_set_doit,
7009 .flags = GENL_ADMIN_PERM,
7010 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7011 },
7012 };
7013
7014 static struct genl_family devlink_nl_family __ro_after_init = {
7015 .name = DEVLINK_GENL_NAME,
7016 .version = DEVLINK_GENL_VERSION,
7017 .maxattr = DEVLINK_ATTR_MAX,
7018 .policy = devlink_nl_policy,
7019 .netnsok = true,
7020 .pre_doit = devlink_nl_pre_doit,
7021 .post_doit = devlink_nl_post_doit,
7022 .module = THIS_MODULE,
7023 .ops = devlink_nl_ops,
7024 .n_ops = ARRAY_SIZE(devlink_nl_ops),
7025 .mcgrps = devlink_nl_mcgrps,
7026 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
7027 };
7028
7029 /**
7030 * devlink_alloc - Allocate new devlink instance resources
7031 *
7032 * @ops: ops
7033 * @priv_size: size of user private data
7034 *
7035 * Allocate new devlink instance resources, including devlink index
7036 * and name.
7037 */
7038 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
7039 {
7040 struct devlink *devlink;
7041
7042 if (WARN_ON(!ops))
7043 return NULL;
7044
7045 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
7046 if (!devlink)
7047 return NULL;
7048 devlink->ops = ops;
7049 xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
7050 __devlink_net_set(devlink, &init_net);
7051 INIT_LIST_HEAD(&devlink->port_list);
7052 INIT_LIST_HEAD(&devlink->sb_list);
7053 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
7054 INIT_LIST_HEAD(&devlink->resource_list);
7055 INIT_LIST_HEAD(&devlink->param_list);
7056 INIT_LIST_HEAD(&devlink->region_list);
7057 INIT_LIST_HEAD(&devlink->reporter_list);
7058 INIT_LIST_HEAD(&devlink->trap_list);
7059 INIT_LIST_HEAD(&devlink->trap_group_list);
7060 INIT_LIST_HEAD(&devlink->trap_policer_list);
7061 mutex_init(&devlink->lock);
7062 mutex_init(&devlink->reporters_lock);
7063 return devlink;
7064 }
7065 EXPORT_SYMBOL_GPL(devlink_alloc);
7066
7067 /**
7068 * devlink_register - Register devlink instance
7069 *
7070 * @devlink: devlink
7071 * @dev: parent device
7072 */
7073 int devlink_register(struct devlink *devlink, struct device *dev)
7074 {
7075 mutex_lock(&devlink_mutex);
7076 devlink->dev = dev;
7077 devlink->registered = true;
7078 list_add_tail(&devlink->list, &devlink_list);
7079 devlink_notify(devlink, DEVLINK_CMD_NEW);
7080 mutex_unlock(&devlink_mutex);
7081 return 0;
7082 }
7083 EXPORT_SYMBOL_GPL(devlink_register);
7084
7085 /**
7086 * devlink_unregister - Unregister devlink instance
7087 *
7088 * @devlink: devlink
7089 */
7090 void devlink_unregister(struct devlink *devlink)
7091 {
7092 mutex_lock(&devlink_mutex);
7093 WARN_ON(devlink_reload_supported(devlink) &&
7094 devlink->reload_enabled);
7095 devlink_notify(devlink, DEVLINK_CMD_DEL);
7096 list_del(&devlink->list);
7097 mutex_unlock(&devlink_mutex);
7098 }
7099 EXPORT_SYMBOL_GPL(devlink_unregister);
7100
7101 /**
7102 * devlink_reload_enable - Enable reload of devlink instance
7103 *
7104 * @devlink: devlink
7105 *
7106 * Should be called at end of device initialization
7107 * process when reload operation is supported.
7108 */
7109 void devlink_reload_enable(struct devlink *devlink)
7110 {
7111 mutex_lock(&devlink_mutex);
7112 devlink->reload_enabled = true;
7113 mutex_unlock(&devlink_mutex);
7114 }
7115 EXPORT_SYMBOL_GPL(devlink_reload_enable);
7116
7117 /**
7118 * devlink_reload_disable - Disable reload of devlink instance
7119 *
7120 * @devlink: devlink
7121 *
7122 * Should be called at the beginning of device cleanup
7123 * process when reload operation is supported.
7124 */
7125 void devlink_reload_disable(struct devlink *devlink)
7126 {
7127 mutex_lock(&devlink_mutex);
7128 /* Mutex is taken which ensures that no reload operation is in
7129 * progress while setting up forbidded flag.
7130 */
7131 devlink->reload_enabled = false;
7132 mutex_unlock(&devlink_mutex);
7133 }
7134 EXPORT_SYMBOL_GPL(devlink_reload_disable);
7135
7136 /**
7137 * devlink_free - Free devlink instance resources
7138 *
7139 * @devlink: devlink
7140 */
7141 void devlink_free(struct devlink *devlink)
7142 {
7143 mutex_destroy(&devlink->reporters_lock);
7144 mutex_destroy(&devlink->lock);
7145 WARN_ON(!list_empty(&devlink->trap_policer_list));
7146 WARN_ON(!list_empty(&devlink->trap_group_list));
7147 WARN_ON(!list_empty(&devlink->trap_list));
7148 WARN_ON(!list_empty(&devlink->reporter_list));
7149 WARN_ON(!list_empty(&devlink->region_list));
7150 WARN_ON(!list_empty(&devlink->param_list));
7151 WARN_ON(!list_empty(&devlink->resource_list));
7152 WARN_ON(!list_empty(&devlink->dpipe_table_list));
7153 WARN_ON(!list_empty(&devlink->sb_list));
7154 WARN_ON(!list_empty(&devlink->port_list));
7155
7156 xa_destroy(&devlink->snapshot_ids);
7157
7158 kfree(devlink);
7159 }
7160 EXPORT_SYMBOL_GPL(devlink_free);
7161
7162 static void devlink_port_type_warn(struct work_struct *work)
7163 {
7164 WARN(true, "Type was not set for devlink port.");
7165 }
7166
7167 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
7168 {
7169 /* Ignore CPU and DSA flavours. */
7170 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
7171 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
7172 }
7173
7174 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
7175
7176 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
7177 {
7178 if (!devlink_port_type_should_warn(devlink_port))
7179 return;
7180 /* Schedule a work to WARN in case driver does not set port
7181 * type within timeout.
7182 */
7183 schedule_delayed_work(&devlink_port->type_warn_dw,
7184 DEVLINK_PORT_TYPE_WARN_TIMEOUT);
7185 }
7186
7187 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
7188 {
7189 if (!devlink_port_type_should_warn(devlink_port))
7190 return;
7191 cancel_delayed_work_sync(&devlink_port->type_warn_dw);
7192 }
7193
7194 /**
7195 * devlink_port_register - Register devlink port
7196 *
7197 * @devlink: devlink
7198 * @devlink_port: devlink port
7199 * @port_index: driver-specific numerical identifier of the port
7200 *
7201 * Register devlink port with provided port index. User can use
7202 * any indexing, even hw-related one. devlink_port structure
7203 * is convenient to be embedded inside user driver private structure.
7204 * Note that the caller should take care of zeroing the devlink_port
7205 * structure.
7206 */
7207 int devlink_port_register(struct devlink *devlink,
7208 struct devlink_port *devlink_port,
7209 unsigned int port_index)
7210 {
7211 mutex_lock(&devlink->lock);
7212 if (devlink_port_index_exists(devlink, port_index)) {
7213 mutex_unlock(&devlink->lock);
7214 return -EEXIST;
7215 }
7216 devlink_port->devlink = devlink;
7217 devlink_port->index = port_index;
7218 devlink_port->registered = true;
7219 spin_lock_init(&devlink_port->type_lock);
7220 list_add_tail(&devlink_port->list, &devlink->port_list);
7221 INIT_LIST_HEAD(&devlink_port->param_list);
7222 mutex_unlock(&devlink->lock);
7223 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
7224 devlink_port_type_warn_schedule(devlink_port);
7225 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7226 return 0;
7227 }
7228 EXPORT_SYMBOL_GPL(devlink_port_register);
7229
7230 /**
7231 * devlink_port_unregister - Unregister devlink port
7232 *
7233 * @devlink_port: devlink port
7234 */
7235 void devlink_port_unregister(struct devlink_port *devlink_port)
7236 {
7237 struct devlink *devlink = devlink_port->devlink;
7238
7239 devlink_port_type_warn_cancel(devlink_port);
7240 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
7241 mutex_lock(&devlink->lock);
7242 list_del(&devlink_port->list);
7243 mutex_unlock(&devlink->lock);
7244 }
7245 EXPORT_SYMBOL_GPL(devlink_port_unregister);
7246
7247 static void __devlink_port_type_set(struct devlink_port *devlink_port,
7248 enum devlink_port_type type,
7249 void *type_dev)
7250 {
7251 if (WARN_ON(!devlink_port->registered))
7252 return;
7253 devlink_port_type_warn_cancel(devlink_port);
7254 spin_lock_bh(&devlink_port->type_lock);
7255 devlink_port->type = type;
7256 devlink_port->type_dev = type_dev;
7257 spin_unlock_bh(&devlink_port->type_lock);
7258 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7259 }
7260
7261 /**
7262 * devlink_port_type_eth_set - Set port type to Ethernet
7263 *
7264 * @devlink_port: devlink port
7265 * @netdev: related netdevice
7266 */
7267 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
7268 struct net_device *netdev)
7269 {
7270 const struct net_device_ops *ops = netdev->netdev_ops;
7271
7272 /* If driver registers devlink port, it should set devlink port
7273 * attributes accordingly so the compat functions are called
7274 * and the original ops are not used.
7275 */
7276 if (ops->ndo_get_phys_port_name) {
7277 /* Some drivers use the same set of ndos for netdevs
7278 * that have devlink_port registered and also for
7279 * those who don't. Make sure that ndo_get_phys_port_name
7280 * returns -EOPNOTSUPP here in case it is defined.
7281 * Warn if not.
7282 */
7283 char name[IFNAMSIZ];
7284 int err;
7285
7286 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
7287 WARN_ON(err != -EOPNOTSUPP);
7288 }
7289 if (ops->ndo_get_port_parent_id) {
7290 /* Some drivers use the same set of ndos for netdevs
7291 * that have devlink_port registered and also for
7292 * those who don't. Make sure that ndo_get_port_parent_id
7293 * returns -EOPNOTSUPP here in case it is defined.
7294 * Warn if not.
7295 */
7296 struct netdev_phys_item_id ppid;
7297 int err;
7298
7299 err = ops->ndo_get_port_parent_id(netdev, &ppid);
7300 WARN_ON(err != -EOPNOTSUPP);
7301 }
7302 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
7303 }
7304 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
7305
7306 /**
7307 * devlink_port_type_ib_set - Set port type to InfiniBand
7308 *
7309 * @devlink_port: devlink port
7310 * @ibdev: related IB device
7311 */
7312 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
7313 struct ib_device *ibdev)
7314 {
7315 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
7316 }
7317 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
7318
7319 /**
7320 * devlink_port_type_clear - Clear port type
7321 *
7322 * @devlink_port: devlink port
7323 */
7324 void devlink_port_type_clear(struct devlink_port *devlink_port)
7325 {
7326 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
7327 devlink_port_type_warn_schedule(devlink_port);
7328 }
7329 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
7330
7331 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
7332 enum devlink_port_flavour flavour,
7333 const unsigned char *switch_id,
7334 unsigned char switch_id_len)
7335 {
7336 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7337
7338 if (WARN_ON(devlink_port->registered))
7339 return -EEXIST;
7340 attrs->set = true;
7341 attrs->flavour = flavour;
7342 if (switch_id) {
7343 attrs->switch_port = true;
7344 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
7345 switch_id_len = MAX_PHYS_ITEM_ID_LEN;
7346 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
7347 attrs->switch_id.id_len = switch_id_len;
7348 } else {
7349 attrs->switch_port = false;
7350 }
7351 return 0;
7352 }
7353
7354 /**
7355 * devlink_port_attrs_set - Set port attributes
7356 *
7357 * @devlink_port: devlink port
7358 * @flavour: flavour of the port
7359 * @port_number: number of the port that is facing user, for example
7360 * the front panel port number
7361 * @split: indicates if this is split port
7362 * @split_subport_number: if the port is split, this is the number
7363 * of subport.
7364 * @switch_id: if the port is part of switch, this is buffer with ID,
7365 * otwerwise this is NULL
7366 * @switch_id_len: length of the switch_id buffer
7367 */
7368 void devlink_port_attrs_set(struct devlink_port *devlink_port,
7369 enum devlink_port_flavour flavour,
7370 u32 port_number, bool split,
7371 u32 split_subport_number,
7372 const unsigned char *switch_id,
7373 unsigned char switch_id_len)
7374 {
7375 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7376 int ret;
7377
7378 ret = __devlink_port_attrs_set(devlink_port, flavour,
7379 switch_id, switch_id_len);
7380 if (ret)
7381 return;
7382 attrs->split = split;
7383 attrs->phys.port_number = port_number;
7384 attrs->phys.split_subport_number = split_subport_number;
7385 }
7386 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
7387
7388 /**
7389 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
7390 *
7391 * @devlink_port: devlink port
7392 * @pf: associated PF for the devlink port instance
7393 * @switch_id: if the port is part of switch, this is buffer with ID,
7394 * otherwise this is NULL
7395 * @switch_id_len: length of the switch_id buffer
7396 */
7397 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
7398 const unsigned char *switch_id,
7399 unsigned char switch_id_len, u16 pf)
7400 {
7401 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7402 int ret;
7403
7404 ret = __devlink_port_attrs_set(devlink_port,
7405 DEVLINK_PORT_FLAVOUR_PCI_PF,
7406 switch_id, switch_id_len);
7407 if (ret)
7408 return;
7409
7410 attrs->pci_pf.pf = pf;
7411 }
7412 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
7413
7414 /**
7415 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
7416 *
7417 * @devlink_port: devlink port
7418 * @pf: associated PF for the devlink port instance
7419 * @vf: associated VF of a PF for the devlink port instance
7420 * @switch_id: if the port is part of switch, this is buffer with ID,
7421 * otherwise this is NULL
7422 * @switch_id_len: length of the switch_id buffer
7423 */
7424 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
7425 const unsigned char *switch_id,
7426 unsigned char switch_id_len,
7427 u16 pf, u16 vf)
7428 {
7429 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7430 int ret;
7431
7432 ret = __devlink_port_attrs_set(devlink_port,
7433 DEVLINK_PORT_FLAVOUR_PCI_VF,
7434 switch_id, switch_id_len);
7435 if (ret)
7436 return;
7437 attrs->pci_vf.pf = pf;
7438 attrs->pci_vf.vf = vf;
7439 }
7440 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
7441
7442 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
7443 char *name, size_t len)
7444 {
7445 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7446 int n = 0;
7447
7448 if (!attrs->set)
7449 return -EOPNOTSUPP;
7450
7451 switch (attrs->flavour) {
7452 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
7453 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
7454 if (!attrs->split)
7455 n = snprintf(name, len, "p%u", attrs->phys.port_number);
7456 else
7457 n = snprintf(name, len, "p%us%u",
7458 attrs->phys.port_number,
7459 attrs->phys.split_subport_number);
7460 break;
7461 case DEVLINK_PORT_FLAVOUR_CPU:
7462 case DEVLINK_PORT_FLAVOUR_DSA:
7463 /* As CPU and DSA ports do not have a netdevice associated
7464 * case should not ever happen.
7465 */
7466 WARN_ON(1);
7467 return -EINVAL;
7468 case DEVLINK_PORT_FLAVOUR_PCI_PF:
7469 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
7470 break;
7471 case DEVLINK_PORT_FLAVOUR_PCI_VF:
7472 n = snprintf(name, len, "pf%uvf%u",
7473 attrs->pci_vf.pf, attrs->pci_vf.vf);
7474 break;
7475 }
7476
7477 if (n >= len)
7478 return -EINVAL;
7479
7480 return 0;
7481 }
7482
7483 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
7484 u32 size, u16 ingress_pools_count,
7485 u16 egress_pools_count, u16 ingress_tc_count,
7486 u16 egress_tc_count)
7487 {
7488 struct devlink_sb *devlink_sb;
7489 int err = 0;
7490
7491 mutex_lock(&devlink->lock);
7492 if (devlink_sb_index_exists(devlink, sb_index)) {
7493 err = -EEXIST;
7494 goto unlock;
7495 }
7496
7497 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
7498 if (!devlink_sb) {
7499 err = -ENOMEM;
7500 goto unlock;
7501 }
7502 devlink_sb->index = sb_index;
7503 devlink_sb->size = size;
7504 devlink_sb->ingress_pools_count = ingress_pools_count;
7505 devlink_sb->egress_pools_count = egress_pools_count;
7506 devlink_sb->ingress_tc_count = ingress_tc_count;
7507 devlink_sb->egress_tc_count = egress_tc_count;
7508 list_add_tail(&devlink_sb->list, &devlink->sb_list);
7509 unlock:
7510 mutex_unlock(&devlink->lock);
7511 return err;
7512 }
7513 EXPORT_SYMBOL_GPL(devlink_sb_register);
7514
7515 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
7516 {
7517 struct devlink_sb *devlink_sb;
7518
7519 mutex_lock(&devlink->lock);
7520 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
7521 WARN_ON(!devlink_sb);
7522 list_del(&devlink_sb->list);
7523 mutex_unlock(&devlink->lock);
7524 kfree(devlink_sb);
7525 }
7526 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
7527
7528 /**
7529 * devlink_dpipe_headers_register - register dpipe headers
7530 *
7531 * @devlink: devlink
7532 * @dpipe_headers: dpipe header array
7533 *
7534 * Register the headers supported by hardware.
7535 */
7536 int devlink_dpipe_headers_register(struct devlink *devlink,
7537 struct devlink_dpipe_headers *dpipe_headers)
7538 {
7539 mutex_lock(&devlink->lock);
7540 devlink->dpipe_headers = dpipe_headers;
7541 mutex_unlock(&devlink->lock);
7542 return 0;
7543 }
7544 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
7545
7546 /**
7547 * devlink_dpipe_headers_unregister - unregister dpipe headers
7548 *
7549 * @devlink: devlink
7550 *
7551 * Unregister the headers supported by hardware.
7552 */
7553 void devlink_dpipe_headers_unregister(struct devlink *devlink)
7554 {
7555 mutex_lock(&devlink->lock);
7556 devlink->dpipe_headers = NULL;
7557 mutex_unlock(&devlink->lock);
7558 }
7559 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
7560
7561 /**
7562 * devlink_dpipe_table_counter_enabled - check if counter allocation
7563 * required
7564 * @devlink: devlink
7565 * @table_name: tables name
7566 *
7567 * Used by driver to check if counter allocation is required.
7568 * After counter allocation is turned on the table entries
7569 * are updated to include counter statistics.
7570 *
7571 * After that point on the driver must respect the counter
7572 * state so that each entry added to the table is added
7573 * with a counter.
7574 */
7575 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
7576 const char *table_name)
7577 {
7578 struct devlink_dpipe_table *table;
7579 bool enabled;
7580
7581 rcu_read_lock();
7582 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7583 table_name, devlink);
7584 enabled = false;
7585 if (table)
7586 enabled = table->counters_enabled;
7587 rcu_read_unlock();
7588 return enabled;
7589 }
7590 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
7591
7592 /**
7593 * devlink_dpipe_table_register - register dpipe table
7594 *
7595 * @devlink: devlink
7596 * @table_name: table name
7597 * @table_ops: table ops
7598 * @priv: priv
7599 * @counter_control_extern: external control for counters
7600 */
7601 int devlink_dpipe_table_register(struct devlink *devlink,
7602 const char *table_name,
7603 struct devlink_dpipe_table_ops *table_ops,
7604 void *priv, bool counter_control_extern)
7605 {
7606 struct devlink_dpipe_table *table;
7607 int err = 0;
7608
7609 if (WARN_ON(!table_ops->size_get))
7610 return -EINVAL;
7611
7612 mutex_lock(&devlink->lock);
7613
7614 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
7615 devlink)) {
7616 err = -EEXIST;
7617 goto unlock;
7618 }
7619
7620 table = kzalloc(sizeof(*table), GFP_KERNEL);
7621 if (!table) {
7622 err = -ENOMEM;
7623 goto unlock;
7624 }
7625
7626 table->name = table_name;
7627 table->table_ops = table_ops;
7628 table->priv = priv;
7629 table->counter_control_extern = counter_control_extern;
7630
7631 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
7632 unlock:
7633 mutex_unlock(&devlink->lock);
7634 return err;
7635 }
7636 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
7637
7638 /**
7639 * devlink_dpipe_table_unregister - unregister dpipe table
7640 *
7641 * @devlink: devlink
7642 * @table_name: table name
7643 */
7644 void devlink_dpipe_table_unregister(struct devlink *devlink,
7645 const char *table_name)
7646 {
7647 struct devlink_dpipe_table *table;
7648
7649 mutex_lock(&devlink->lock);
7650 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7651 table_name, devlink);
7652 if (!table)
7653 goto unlock;
7654 list_del_rcu(&table->list);
7655 mutex_unlock(&devlink->lock);
7656 kfree_rcu(table, rcu);
7657 return;
7658 unlock:
7659 mutex_unlock(&devlink->lock);
7660 }
7661 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
7662
7663 /**
7664 * devlink_resource_register - devlink resource register
7665 *
7666 * @devlink: devlink
7667 * @resource_name: resource's name
7668 * @resource_size: resource's size
7669 * @resource_id: resource's id
7670 * @parent_resource_id: resource's parent id
7671 * @size_params: size parameters
7672 */
7673 int devlink_resource_register(struct devlink *devlink,
7674 const char *resource_name,
7675 u64 resource_size,
7676 u64 resource_id,
7677 u64 parent_resource_id,
7678 const struct devlink_resource_size_params *size_params)
7679 {
7680 struct devlink_resource *resource;
7681 struct list_head *resource_list;
7682 bool top_hierarchy;
7683 int err = 0;
7684
7685 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
7686
7687 mutex_lock(&devlink->lock);
7688 resource = devlink_resource_find(devlink, NULL, resource_id);
7689 if (resource) {
7690 err = -EINVAL;
7691 goto out;
7692 }
7693
7694 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
7695 if (!resource) {
7696 err = -ENOMEM;
7697 goto out;
7698 }
7699
7700 if (top_hierarchy) {
7701 resource_list = &devlink->resource_list;
7702 } else {
7703 struct devlink_resource *parent_resource;
7704
7705 parent_resource = devlink_resource_find(devlink, NULL,
7706 parent_resource_id);
7707 if (parent_resource) {
7708 resource_list = &parent_resource->resource_list;
7709 resource->parent = parent_resource;
7710 } else {
7711 kfree(resource);
7712 err = -EINVAL;
7713 goto out;
7714 }
7715 }
7716
7717 resource->name = resource_name;
7718 resource->size = resource_size;
7719 resource->size_new = resource_size;
7720 resource->id = resource_id;
7721 resource->size_valid = true;
7722 memcpy(&resource->size_params, size_params,
7723 sizeof(resource->size_params));
7724 INIT_LIST_HEAD(&resource->resource_list);
7725 list_add_tail(&resource->list, resource_list);
7726 out:
7727 mutex_unlock(&devlink->lock);
7728 return err;
7729 }
7730 EXPORT_SYMBOL_GPL(devlink_resource_register);
7731
7732 /**
7733 * devlink_resources_unregister - free all resources
7734 *
7735 * @devlink: devlink
7736 * @resource: resource
7737 */
7738 void devlink_resources_unregister(struct devlink *devlink,
7739 struct devlink_resource *resource)
7740 {
7741 struct devlink_resource *tmp, *child_resource;
7742 struct list_head *resource_list;
7743
7744 if (resource)
7745 resource_list = &resource->resource_list;
7746 else
7747 resource_list = &devlink->resource_list;
7748
7749 if (!resource)
7750 mutex_lock(&devlink->lock);
7751
7752 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
7753 devlink_resources_unregister(devlink, child_resource);
7754 list_del(&child_resource->list);
7755 kfree(child_resource);
7756 }
7757
7758 if (!resource)
7759 mutex_unlock(&devlink->lock);
7760 }
7761 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
7762
7763 /**
7764 * devlink_resource_size_get - get and update size
7765 *
7766 * @devlink: devlink
7767 * @resource_id: the requested resource id
7768 * @p_resource_size: ptr to update
7769 */
7770 int devlink_resource_size_get(struct devlink *devlink,
7771 u64 resource_id,
7772 u64 *p_resource_size)
7773 {
7774 struct devlink_resource *resource;
7775 int err = 0;
7776
7777 mutex_lock(&devlink->lock);
7778 resource = devlink_resource_find(devlink, NULL, resource_id);
7779 if (!resource) {
7780 err = -EINVAL;
7781 goto out;
7782 }
7783 *p_resource_size = resource->size_new;
7784 resource->size = resource->size_new;
7785 out:
7786 mutex_unlock(&devlink->lock);
7787 return err;
7788 }
7789 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7790
7791 /**
7792 * devlink_dpipe_table_resource_set - set the resource id
7793 *
7794 * @devlink: devlink
7795 * @table_name: table name
7796 * @resource_id: resource id
7797 * @resource_units: number of resource's units consumed per table's entry
7798 */
7799 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7800 const char *table_name, u64 resource_id,
7801 u64 resource_units)
7802 {
7803 struct devlink_dpipe_table *table;
7804 int err = 0;
7805
7806 mutex_lock(&devlink->lock);
7807 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7808 table_name, devlink);
7809 if (!table) {
7810 err = -EINVAL;
7811 goto out;
7812 }
7813 table->resource_id = resource_id;
7814 table->resource_units = resource_units;
7815 table->resource_valid = true;
7816 out:
7817 mutex_unlock(&devlink->lock);
7818 return err;
7819 }
7820 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7821
7822 /**
7823 * devlink_resource_occ_get_register - register occupancy getter
7824 *
7825 * @devlink: devlink
7826 * @resource_id: resource id
7827 * @occ_get: occupancy getter callback
7828 * @occ_get_priv: occupancy getter callback priv
7829 */
7830 void devlink_resource_occ_get_register(struct devlink *devlink,
7831 u64 resource_id,
7832 devlink_resource_occ_get_t *occ_get,
7833 void *occ_get_priv)
7834 {
7835 struct devlink_resource *resource;
7836
7837 mutex_lock(&devlink->lock);
7838 resource = devlink_resource_find(devlink, NULL, resource_id);
7839 if (WARN_ON(!resource))
7840 goto out;
7841 WARN_ON(resource->occ_get);
7842
7843 resource->occ_get = occ_get;
7844 resource->occ_get_priv = occ_get_priv;
7845 out:
7846 mutex_unlock(&devlink->lock);
7847 }
7848 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7849
7850 /**
7851 * devlink_resource_occ_get_unregister - unregister occupancy getter
7852 *
7853 * @devlink: devlink
7854 * @resource_id: resource id
7855 */
7856 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7857 u64 resource_id)
7858 {
7859 struct devlink_resource *resource;
7860
7861 mutex_lock(&devlink->lock);
7862 resource = devlink_resource_find(devlink, NULL, resource_id);
7863 if (WARN_ON(!resource))
7864 goto out;
7865 WARN_ON(!resource->occ_get);
7866
7867 resource->occ_get = NULL;
7868 resource->occ_get_priv = NULL;
7869 out:
7870 mutex_unlock(&devlink->lock);
7871 }
7872 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7873
7874 static int devlink_param_verify(const struct devlink_param *param)
7875 {
7876 if (!param || !param->name || !param->supported_cmodes)
7877 return -EINVAL;
7878 if (param->generic)
7879 return devlink_param_generic_verify(param);
7880 else
7881 return devlink_param_driver_verify(param);
7882 }
7883
7884 static int __devlink_params_register(struct devlink *devlink,
7885 unsigned int port_index,
7886 struct list_head *param_list,
7887 const struct devlink_param *params,
7888 size_t params_count,
7889 enum devlink_command reg_cmd,
7890 enum devlink_command unreg_cmd)
7891 {
7892 const struct devlink_param *param = params;
7893 int i;
7894 int err;
7895
7896 mutex_lock(&devlink->lock);
7897 for (i = 0; i < params_count; i++, param++) {
7898 err = devlink_param_verify(param);
7899 if (err)
7900 goto rollback;
7901
7902 err = devlink_param_register_one(devlink, port_index,
7903 param_list, param, reg_cmd);
7904 if (err)
7905 goto rollback;
7906 }
7907
7908 mutex_unlock(&devlink->lock);
7909 return 0;
7910
7911 rollback:
7912 if (!i)
7913 goto unlock;
7914 for (param--; i > 0; i--, param--)
7915 devlink_param_unregister_one(devlink, port_index, param_list,
7916 param, unreg_cmd);
7917 unlock:
7918 mutex_unlock(&devlink->lock);
7919 return err;
7920 }
7921
7922 static void __devlink_params_unregister(struct devlink *devlink,
7923 unsigned int port_index,
7924 struct list_head *param_list,
7925 const struct devlink_param *params,
7926 size_t params_count,
7927 enum devlink_command cmd)
7928 {
7929 const struct devlink_param *param = params;
7930 int i;
7931
7932 mutex_lock(&devlink->lock);
7933 for (i = 0; i < params_count; i++, param++)
7934 devlink_param_unregister_one(devlink, 0, param_list, param,
7935 cmd);
7936 mutex_unlock(&devlink->lock);
7937 }
7938
7939 /**
7940 * devlink_params_register - register configuration parameters
7941 *
7942 * @devlink: devlink
7943 * @params: configuration parameters array
7944 * @params_count: number of parameters provided
7945 *
7946 * Register the configuration parameters supported by the driver.
7947 */
7948 int devlink_params_register(struct devlink *devlink,
7949 const struct devlink_param *params,
7950 size_t params_count)
7951 {
7952 return __devlink_params_register(devlink, 0, &devlink->param_list,
7953 params, params_count,
7954 DEVLINK_CMD_PARAM_NEW,
7955 DEVLINK_CMD_PARAM_DEL);
7956 }
7957 EXPORT_SYMBOL_GPL(devlink_params_register);
7958
7959 /**
7960 * devlink_params_unregister - unregister configuration parameters
7961 * @devlink: devlink
7962 * @params: configuration parameters to unregister
7963 * @params_count: number of parameters provided
7964 */
7965 void devlink_params_unregister(struct devlink *devlink,
7966 const struct devlink_param *params,
7967 size_t params_count)
7968 {
7969 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7970 params, params_count,
7971 DEVLINK_CMD_PARAM_DEL);
7972 }
7973 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7974
7975 /**
7976 * devlink_params_publish - publish configuration parameters
7977 *
7978 * @devlink: devlink
7979 *
7980 * Publish previously registered configuration parameters.
7981 */
7982 void devlink_params_publish(struct devlink *devlink)
7983 {
7984 struct devlink_param_item *param_item;
7985
7986 list_for_each_entry(param_item, &devlink->param_list, list) {
7987 if (param_item->published)
7988 continue;
7989 param_item->published = true;
7990 devlink_param_notify(devlink, 0, param_item,
7991 DEVLINK_CMD_PARAM_NEW);
7992 }
7993 }
7994 EXPORT_SYMBOL_GPL(devlink_params_publish);
7995
7996 /**
7997 * devlink_params_unpublish - unpublish configuration parameters
7998 *
7999 * @devlink: devlink
8000 *
8001 * Unpublish previously registered configuration parameters.
8002 */
8003 void devlink_params_unpublish(struct devlink *devlink)
8004 {
8005 struct devlink_param_item *param_item;
8006
8007 list_for_each_entry(param_item, &devlink->param_list, list) {
8008 if (!param_item->published)
8009 continue;
8010 param_item->published = false;
8011 devlink_param_notify(devlink, 0, param_item,
8012 DEVLINK_CMD_PARAM_DEL);
8013 }
8014 }
8015 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
8016
8017 /**
8018 * devlink_port_params_register - register port configuration parameters
8019 *
8020 * @devlink_port: devlink port
8021 * @params: configuration parameters array
8022 * @params_count: number of parameters provided
8023 *
8024 * Register the configuration parameters supported by the port.
8025 */
8026 int devlink_port_params_register(struct devlink_port *devlink_port,
8027 const struct devlink_param *params,
8028 size_t params_count)
8029 {
8030 return __devlink_params_register(devlink_port->devlink,
8031 devlink_port->index,
8032 &devlink_port->param_list, params,
8033 params_count,
8034 DEVLINK_CMD_PORT_PARAM_NEW,
8035 DEVLINK_CMD_PORT_PARAM_DEL);
8036 }
8037 EXPORT_SYMBOL_GPL(devlink_port_params_register);
8038
8039 /**
8040 * devlink_port_params_unregister - unregister port configuration
8041 * parameters
8042 *
8043 * @devlink_port: devlink port
8044 * @params: configuration parameters array
8045 * @params_count: number of parameters provided
8046 */
8047 void devlink_port_params_unregister(struct devlink_port *devlink_port,
8048 const struct devlink_param *params,
8049 size_t params_count)
8050 {
8051 return __devlink_params_unregister(devlink_port->devlink,
8052 devlink_port->index,
8053 &devlink_port->param_list,
8054 params, params_count,
8055 DEVLINK_CMD_PORT_PARAM_DEL);
8056 }
8057 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
8058
8059 static int
8060 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
8061 union devlink_param_value *init_val)
8062 {
8063 struct devlink_param_item *param_item;
8064
8065 param_item = devlink_param_find_by_id(param_list, param_id);
8066 if (!param_item)
8067 return -EINVAL;
8068
8069 if (!param_item->driverinit_value_valid ||
8070 !devlink_param_cmode_is_supported(param_item->param,
8071 DEVLINK_PARAM_CMODE_DRIVERINIT))
8072 return -EOPNOTSUPP;
8073
8074 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8075 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
8076 else
8077 *init_val = param_item->driverinit_value;
8078
8079 return 0;
8080 }
8081
8082 static int
8083 __devlink_param_driverinit_value_set(struct devlink *devlink,
8084 unsigned int port_index,
8085 struct list_head *param_list, u32 param_id,
8086 union devlink_param_value init_val,
8087 enum devlink_command cmd)
8088 {
8089 struct devlink_param_item *param_item;
8090
8091 param_item = devlink_param_find_by_id(param_list, param_id);
8092 if (!param_item)
8093 return -EINVAL;
8094
8095 if (!devlink_param_cmode_is_supported(param_item->param,
8096 DEVLINK_PARAM_CMODE_DRIVERINIT))
8097 return -EOPNOTSUPP;
8098
8099 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8100 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
8101 else
8102 param_item->driverinit_value = init_val;
8103 param_item->driverinit_value_valid = true;
8104
8105 devlink_param_notify(devlink, port_index, param_item, cmd);
8106 return 0;
8107 }
8108
8109 /**
8110 * devlink_param_driverinit_value_get - get configuration parameter
8111 * value for driver initializing
8112 *
8113 * @devlink: devlink
8114 * @param_id: parameter ID
8115 * @init_val: value of parameter in driverinit configuration mode
8116 *
8117 * This function should be used by the driver to get driverinit
8118 * configuration for initialization after reload command.
8119 */
8120 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
8121 union devlink_param_value *init_val)
8122 {
8123 if (!devlink_reload_supported(devlink))
8124 return -EOPNOTSUPP;
8125
8126 return __devlink_param_driverinit_value_get(&devlink->param_list,
8127 param_id, init_val);
8128 }
8129 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
8130
8131 /**
8132 * devlink_param_driverinit_value_set - set value of configuration
8133 * parameter for driverinit
8134 * configuration mode
8135 *
8136 * @devlink: devlink
8137 * @param_id: parameter ID
8138 * @init_val: value of parameter to set for driverinit configuration mode
8139 *
8140 * This function should be used by the driver to set driverinit
8141 * configuration mode default value.
8142 */
8143 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
8144 union devlink_param_value init_val)
8145 {
8146 return __devlink_param_driverinit_value_set(devlink, 0,
8147 &devlink->param_list,
8148 param_id, init_val,
8149 DEVLINK_CMD_PARAM_NEW);
8150 }
8151 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
8152
8153 /**
8154 * devlink_port_param_driverinit_value_get - get configuration parameter
8155 * value for driver initializing
8156 *
8157 * @devlink_port: devlink_port
8158 * @param_id: parameter ID
8159 * @init_val: value of parameter in driverinit configuration mode
8160 *
8161 * This function should be used by the driver to get driverinit
8162 * configuration for initialization after reload command.
8163 */
8164 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
8165 u32 param_id,
8166 union devlink_param_value *init_val)
8167 {
8168 struct devlink *devlink = devlink_port->devlink;
8169
8170 if (!devlink_reload_supported(devlink))
8171 return -EOPNOTSUPP;
8172
8173 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
8174 param_id, init_val);
8175 }
8176 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
8177
8178 /**
8179 * devlink_port_param_driverinit_value_set - set value of configuration
8180 * parameter for driverinit
8181 * configuration mode
8182 *
8183 * @devlink_port: devlink_port
8184 * @param_id: parameter ID
8185 * @init_val: value of parameter to set for driverinit configuration mode
8186 *
8187 * This function should be used by the driver to set driverinit
8188 * configuration mode default value.
8189 */
8190 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
8191 u32 param_id,
8192 union devlink_param_value init_val)
8193 {
8194 return __devlink_param_driverinit_value_set(devlink_port->devlink,
8195 devlink_port->index,
8196 &devlink_port->param_list,
8197 param_id, init_val,
8198 DEVLINK_CMD_PORT_PARAM_NEW);
8199 }
8200 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
8201
8202 /**
8203 * devlink_param_value_changed - notify devlink on a parameter's value
8204 * change. Should be called by the driver
8205 * right after the change.
8206 *
8207 * @devlink: devlink
8208 * @param_id: parameter ID
8209 *
8210 * This function should be used by the driver to notify devlink on value
8211 * change, excluding driverinit configuration mode.
8212 * For driverinit configuration mode driver should use the function
8213 */
8214 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
8215 {
8216 struct devlink_param_item *param_item;
8217
8218 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
8219 WARN_ON(!param_item);
8220
8221 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
8222 }
8223 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
8224
8225 /**
8226 * devlink_port_param_value_changed - notify devlink on a parameter's value
8227 * change. Should be called by the driver
8228 * right after the change.
8229 *
8230 * @devlink_port: devlink_port
8231 * @param_id: parameter ID
8232 *
8233 * This function should be used by the driver to notify devlink on value
8234 * change, excluding driverinit configuration mode.
8235 * For driverinit configuration mode driver should use the function
8236 * devlink_port_param_driverinit_value_set() instead.
8237 */
8238 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
8239 u32 param_id)
8240 {
8241 struct devlink_param_item *param_item;
8242
8243 param_item = devlink_param_find_by_id(&devlink_port->param_list,
8244 param_id);
8245 WARN_ON(!param_item);
8246
8247 devlink_param_notify(devlink_port->devlink, devlink_port->index,
8248 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
8249 }
8250 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
8251
8252 /**
8253 * devlink_param_value_str_fill - Safely fill-up the string preventing
8254 * from overflow of the preallocated buffer
8255 *
8256 * @dst_val: destination devlink_param_value
8257 * @src: source buffer
8258 */
8259 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
8260 const char *src)
8261 {
8262 size_t len;
8263
8264 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
8265 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
8266 }
8267 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
8268
8269 /**
8270 * devlink_region_create - create a new address region
8271 *
8272 * @devlink: devlink
8273 * @ops: region operations and name
8274 * @region_max_snapshots: Maximum supported number of snapshots for region
8275 * @region_size: size of region
8276 */
8277 struct devlink_region *
8278 devlink_region_create(struct devlink *devlink,
8279 const struct devlink_region_ops *ops,
8280 u32 region_max_snapshots, u64 region_size)
8281 {
8282 struct devlink_region *region;
8283 int err = 0;
8284
8285 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
8286 return ERR_PTR(-EINVAL);
8287
8288 mutex_lock(&devlink->lock);
8289
8290 if (devlink_region_get_by_name(devlink, ops->name)) {
8291 err = -EEXIST;
8292 goto unlock;
8293 }
8294
8295 region = kzalloc(sizeof(*region), GFP_KERNEL);
8296 if (!region) {
8297 err = -ENOMEM;
8298 goto unlock;
8299 }
8300
8301 region->devlink = devlink;
8302 region->max_snapshots = region_max_snapshots;
8303 region->ops = ops;
8304 region->size = region_size;
8305 INIT_LIST_HEAD(&region->snapshot_list);
8306 list_add_tail(&region->list, &devlink->region_list);
8307 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
8308
8309 mutex_unlock(&devlink->lock);
8310 return region;
8311
8312 unlock:
8313 mutex_unlock(&devlink->lock);
8314 return ERR_PTR(err);
8315 }
8316 EXPORT_SYMBOL_GPL(devlink_region_create);
8317
8318 /**
8319 * devlink_region_destroy - destroy address region
8320 *
8321 * @region: devlink region to destroy
8322 */
8323 void devlink_region_destroy(struct devlink_region *region)
8324 {
8325 struct devlink *devlink = region->devlink;
8326 struct devlink_snapshot *snapshot, *ts;
8327
8328 mutex_lock(&devlink->lock);
8329
8330 /* Free all snapshots of region */
8331 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
8332 devlink_region_snapshot_del(region, snapshot);
8333
8334 list_del(&region->list);
8335
8336 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
8337 mutex_unlock(&devlink->lock);
8338 kfree(region);
8339 }
8340 EXPORT_SYMBOL_GPL(devlink_region_destroy);
8341
8342 /**
8343 * devlink_region_snapshot_id_get - get snapshot ID
8344 *
8345 * This callback should be called when adding a new snapshot,
8346 * Driver should use the same id for multiple snapshots taken
8347 * on multiple regions at the same time/by the same trigger.
8348 *
8349 * The caller of this function must use devlink_region_snapshot_id_put
8350 * when finished creating regions using this id.
8351 *
8352 * Returns zero on success, or a negative error code on failure.
8353 *
8354 * @devlink: devlink
8355 * @id: storage to return id
8356 */
8357 int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
8358 {
8359 int err;
8360
8361 mutex_lock(&devlink->lock);
8362 err = __devlink_region_snapshot_id_get(devlink, id);
8363 mutex_unlock(&devlink->lock);
8364
8365 return err;
8366 }
8367 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
8368
8369 /**
8370 * devlink_region_snapshot_id_put - put snapshot ID reference
8371 *
8372 * This should be called by a driver after finishing creating snapshots
8373 * with an id. Doing so ensures that the ID can later be released in the
8374 * event that all snapshots using it have been destroyed.
8375 *
8376 * @devlink: devlink
8377 * @id: id to release reference on
8378 */
8379 void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
8380 {
8381 mutex_lock(&devlink->lock);
8382 __devlink_snapshot_id_decrement(devlink, id);
8383 mutex_unlock(&devlink->lock);
8384 }
8385 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
8386
8387 /**
8388 * devlink_region_snapshot_create - create a new snapshot
8389 * This will add a new snapshot of a region. The snapshot
8390 * will be stored on the region struct and can be accessed
8391 * from devlink. This is useful for future analyses of snapshots.
8392 * Multiple snapshots can be created on a region.
8393 * The @snapshot_id should be obtained using the getter function.
8394 *
8395 * @region: devlink region of the snapshot
8396 * @data: snapshot data
8397 * @snapshot_id: snapshot id to be created
8398 */
8399 int devlink_region_snapshot_create(struct devlink_region *region,
8400 u8 *data, u32 snapshot_id)
8401 {
8402 struct devlink *devlink = region->devlink;
8403 int err;
8404
8405 mutex_lock(&devlink->lock);
8406 err = __devlink_region_snapshot_create(region, data, snapshot_id);
8407 mutex_unlock(&devlink->lock);
8408
8409 return err;
8410 }
8411 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
8412
8413 #define DEVLINK_TRAP(_id, _type) \
8414 { \
8415 .type = DEVLINK_TRAP_TYPE_##_type, \
8416 .id = DEVLINK_TRAP_GENERIC_ID_##_id, \
8417 .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
8418 }
8419
8420 static const struct devlink_trap devlink_trap_generic[] = {
8421 DEVLINK_TRAP(SMAC_MC, DROP),
8422 DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
8423 DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
8424 DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
8425 DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
8426 DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
8427 DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
8428 DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
8429 DEVLINK_TRAP(TAIL_DROP, DROP),
8430 DEVLINK_TRAP(NON_IP_PACKET, DROP),
8431 DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
8432 DEVLINK_TRAP(DIP_LB, DROP),
8433 DEVLINK_TRAP(SIP_MC, DROP),
8434 DEVLINK_TRAP(SIP_LB, DROP),
8435 DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
8436 DEVLINK_TRAP(IPV4_SIP_BC, DROP),
8437 DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
8438 DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
8439 DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
8440 DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
8441 DEVLINK_TRAP(RPF, EXCEPTION),
8442 DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
8443 DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
8444 DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
8445 DEVLINK_TRAP(NON_ROUTABLE, DROP),
8446 DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
8447 DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
8448 DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
8449 DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
8450 };
8451
8452 #define DEVLINK_TRAP_GROUP(_id) \
8453 { \
8454 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
8455 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
8456 }
8457
8458 static const struct devlink_trap_group devlink_trap_group_generic[] = {
8459 DEVLINK_TRAP_GROUP(L2_DROPS),
8460 DEVLINK_TRAP_GROUP(L3_DROPS),
8461 DEVLINK_TRAP_GROUP(BUFFER_DROPS),
8462 DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
8463 DEVLINK_TRAP_GROUP(ACL_DROPS),
8464 };
8465
8466 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
8467 {
8468 if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
8469 return -EINVAL;
8470
8471 if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
8472 return -EINVAL;
8473
8474 if (trap->type != devlink_trap_generic[trap->id].type)
8475 return -EINVAL;
8476
8477 return 0;
8478 }
8479
8480 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
8481 {
8482 int i;
8483
8484 if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
8485 return -EINVAL;
8486
8487 for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
8488 if (!strcmp(trap->name, devlink_trap_generic[i].name))
8489 return -EEXIST;
8490 }
8491
8492 return 0;
8493 }
8494
8495 static int devlink_trap_verify(const struct devlink_trap *trap)
8496 {
8497 if (!trap || !trap->name)
8498 return -EINVAL;
8499
8500 if (trap->generic)
8501 return devlink_trap_generic_verify(trap);
8502 else
8503 return devlink_trap_driver_verify(trap);
8504 }
8505
8506 static int
8507 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
8508 {
8509 if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8510 return -EINVAL;
8511
8512 if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
8513 return -EINVAL;
8514
8515 return 0;
8516 }
8517
8518 static int
8519 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
8520 {
8521 int i;
8522
8523 if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8524 return -EINVAL;
8525
8526 for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
8527 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
8528 return -EEXIST;
8529 }
8530
8531 return 0;
8532 }
8533
8534 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
8535 {
8536 if (group->generic)
8537 return devlink_trap_group_generic_verify(group);
8538 else
8539 return devlink_trap_group_driver_verify(group);
8540 }
8541
8542 static void
8543 devlink_trap_group_notify(struct devlink *devlink,
8544 const struct devlink_trap_group_item *group_item,
8545 enum devlink_command cmd)
8546 {
8547 struct sk_buff *msg;
8548 int err;
8549
8550 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
8551 cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
8552
8553 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8554 if (!msg)
8555 return;
8556
8557 err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
8558 0);
8559 if (err) {
8560 nlmsg_free(msg);
8561 return;
8562 }
8563
8564 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8565 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8566 }
8567
8568 static int
8569 devlink_trap_item_group_link(struct devlink *devlink,
8570 struct devlink_trap_item *trap_item)
8571 {
8572 u16 group_id = trap_item->trap->init_group_id;
8573 struct devlink_trap_group_item *group_item;
8574
8575 group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
8576 if (WARN_ON_ONCE(!group_item))
8577 return -EINVAL;
8578
8579 trap_item->group_item = group_item;
8580
8581 return 0;
8582 }
8583
8584 static void devlink_trap_notify(struct devlink *devlink,
8585 const struct devlink_trap_item *trap_item,
8586 enum devlink_command cmd)
8587 {
8588 struct sk_buff *msg;
8589 int err;
8590
8591 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
8592 cmd != DEVLINK_CMD_TRAP_DEL);
8593
8594 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8595 if (!msg)
8596 return;
8597
8598 err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
8599 if (err) {
8600 nlmsg_free(msg);
8601 return;
8602 }
8603
8604 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8605 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8606 }
8607
8608 static int
8609 devlink_trap_register(struct devlink *devlink,
8610 const struct devlink_trap *trap, void *priv)
8611 {
8612 struct devlink_trap_item *trap_item;
8613 int err;
8614
8615 if (devlink_trap_item_lookup(devlink, trap->name))
8616 return -EEXIST;
8617
8618 trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
8619 if (!trap_item)
8620 return -ENOMEM;
8621
8622 trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8623 if (!trap_item->stats) {
8624 err = -ENOMEM;
8625 goto err_stats_alloc;
8626 }
8627
8628 trap_item->trap = trap;
8629 trap_item->action = trap->init_action;
8630 trap_item->priv = priv;
8631
8632 err = devlink_trap_item_group_link(devlink, trap_item);
8633 if (err)
8634 goto err_group_link;
8635
8636 err = devlink->ops->trap_init(devlink, trap, trap_item);
8637 if (err)
8638 goto err_trap_init;
8639
8640 list_add_tail(&trap_item->list, &devlink->trap_list);
8641 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
8642
8643 return 0;
8644
8645 err_trap_init:
8646 err_group_link:
8647 free_percpu(trap_item->stats);
8648 err_stats_alloc:
8649 kfree(trap_item);
8650 return err;
8651 }
8652
8653 static void devlink_trap_unregister(struct devlink *devlink,
8654 const struct devlink_trap *trap)
8655 {
8656 struct devlink_trap_item *trap_item;
8657
8658 trap_item = devlink_trap_item_lookup(devlink, trap->name);
8659 if (WARN_ON_ONCE(!trap_item))
8660 return;
8661
8662 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
8663 list_del(&trap_item->list);
8664 if (devlink->ops->trap_fini)
8665 devlink->ops->trap_fini(devlink, trap, trap_item);
8666 free_percpu(trap_item->stats);
8667 kfree(trap_item);
8668 }
8669
8670 static void devlink_trap_disable(struct devlink *devlink,
8671 const struct devlink_trap *trap)
8672 {
8673 struct devlink_trap_item *trap_item;
8674
8675 trap_item = devlink_trap_item_lookup(devlink, trap->name);
8676 if (WARN_ON_ONCE(!trap_item))
8677 return;
8678
8679 devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
8680 trap_item->action = DEVLINK_TRAP_ACTION_DROP;
8681 }
8682
8683 /**
8684 * devlink_traps_register - Register packet traps with devlink.
8685 * @devlink: devlink.
8686 * @traps: Packet traps.
8687 * @traps_count: Count of provided packet traps.
8688 * @priv: Driver private information.
8689 *
8690 * Return: Non-zero value on failure.
8691 */
8692 int devlink_traps_register(struct devlink *devlink,
8693 const struct devlink_trap *traps,
8694 size_t traps_count, void *priv)
8695 {
8696 int i, err;
8697
8698 if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8699 return -EINVAL;
8700
8701 mutex_lock(&devlink->lock);
8702 for (i = 0; i < traps_count; i++) {
8703 const struct devlink_trap *trap = &traps[i];
8704
8705 err = devlink_trap_verify(trap);
8706 if (err)
8707 goto err_trap_verify;
8708
8709 err = devlink_trap_register(devlink, trap, priv);
8710 if (err)
8711 goto err_trap_register;
8712 }
8713 mutex_unlock(&devlink->lock);
8714
8715 return 0;
8716
8717 err_trap_register:
8718 err_trap_verify:
8719 for (i--; i >= 0; i--)
8720 devlink_trap_unregister(devlink, &traps[i]);
8721 mutex_unlock(&devlink->lock);
8722 return err;
8723 }
8724 EXPORT_SYMBOL_GPL(devlink_traps_register);
8725
8726 /**
8727 * devlink_traps_unregister - Unregister packet traps from devlink.
8728 * @devlink: devlink.
8729 * @traps: Packet traps.
8730 * @traps_count: Count of provided packet traps.
8731 */
8732 void devlink_traps_unregister(struct devlink *devlink,
8733 const struct devlink_trap *traps,
8734 size_t traps_count)
8735 {
8736 int i;
8737
8738 mutex_lock(&devlink->lock);
8739 /* Make sure we do not have any packets in-flight while unregistering
8740 * traps by disabling all of them and waiting for a grace period.
8741 */
8742 for (i = traps_count - 1; i >= 0; i--)
8743 devlink_trap_disable(devlink, &traps[i]);
8744 synchronize_rcu();
8745 for (i = traps_count - 1; i >= 0; i--)
8746 devlink_trap_unregister(devlink, &traps[i]);
8747 mutex_unlock(&devlink->lock);
8748 }
8749 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8750
8751 static void
8752 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8753 size_t skb_len)
8754 {
8755 struct devlink_stats *stats;
8756
8757 stats = this_cpu_ptr(trap_stats);
8758 u64_stats_update_begin(&stats->syncp);
8759 stats->rx_bytes += skb_len;
8760 stats->rx_packets++;
8761 u64_stats_update_end(&stats->syncp);
8762 }
8763
8764 static void
8765 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8766 const struct devlink_trap_item *trap_item,
8767 struct devlink_port *in_devlink_port,
8768 const struct flow_action_cookie *fa_cookie)
8769 {
8770 struct devlink_trap_group_item *group_item = trap_item->group_item;
8771
8772 hw_metadata->trap_group_name = group_item->group->name;
8773 hw_metadata->trap_name = trap_item->trap->name;
8774 hw_metadata->fa_cookie = fa_cookie;
8775
8776 spin_lock(&in_devlink_port->type_lock);
8777 if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8778 hw_metadata->input_dev = in_devlink_port->type_dev;
8779 spin_unlock(&in_devlink_port->type_lock);
8780 }
8781
8782 /**
8783 * devlink_trap_report - Report trapped packet to drop monitor.
8784 * @devlink: devlink.
8785 * @skb: Trapped packet.
8786 * @trap_ctx: Trap context.
8787 * @in_devlink_port: Input devlink port.
8788 * @fa_cookie: Flow action cookie. Could be NULL.
8789 */
8790 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8791 void *trap_ctx, struct devlink_port *in_devlink_port,
8792 const struct flow_action_cookie *fa_cookie)
8793
8794 {
8795 struct devlink_trap_item *trap_item = trap_ctx;
8796 struct net_dm_hw_metadata hw_metadata = {};
8797
8798 devlink_trap_stats_update(trap_item->stats, skb->len);
8799 devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8800
8801 devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8802 in_devlink_port, fa_cookie);
8803 net_dm_hw_report(skb, &hw_metadata);
8804 }
8805 EXPORT_SYMBOL_GPL(devlink_trap_report);
8806
8807 /**
8808 * devlink_trap_ctx_priv - Trap context to driver private information.
8809 * @trap_ctx: Trap context.
8810 *
8811 * Return: Driver private information passed during registration.
8812 */
8813 void *devlink_trap_ctx_priv(void *trap_ctx)
8814 {
8815 struct devlink_trap_item *trap_item = trap_ctx;
8816
8817 return trap_item->priv;
8818 }
8819 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8820
8821 static int
8822 devlink_trap_group_item_policer_link(struct devlink *devlink,
8823 struct devlink_trap_group_item *group_item)
8824 {
8825 u32 policer_id = group_item->group->init_policer_id;
8826 struct devlink_trap_policer_item *policer_item;
8827
8828 if (policer_id == 0)
8829 return 0;
8830
8831 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
8832 if (WARN_ON_ONCE(!policer_item))
8833 return -EINVAL;
8834
8835 group_item->policer_item = policer_item;
8836
8837 return 0;
8838 }
8839
8840 static int
8841 devlink_trap_group_register(struct devlink *devlink,
8842 const struct devlink_trap_group *group)
8843 {
8844 struct devlink_trap_group_item *group_item;
8845 int err;
8846
8847 if (devlink_trap_group_item_lookup(devlink, group->name))
8848 return -EEXIST;
8849
8850 group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
8851 if (!group_item)
8852 return -ENOMEM;
8853
8854 group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8855 if (!group_item->stats) {
8856 err = -ENOMEM;
8857 goto err_stats_alloc;
8858 }
8859
8860 group_item->group = group;
8861
8862 err = devlink_trap_group_item_policer_link(devlink, group_item);
8863 if (err)
8864 goto err_policer_link;
8865
8866 if (devlink->ops->trap_group_init) {
8867 err = devlink->ops->trap_group_init(devlink, group);
8868 if (err)
8869 goto err_group_init;
8870 }
8871
8872 list_add_tail(&group_item->list, &devlink->trap_group_list);
8873 devlink_trap_group_notify(devlink, group_item,
8874 DEVLINK_CMD_TRAP_GROUP_NEW);
8875
8876 return 0;
8877
8878 err_group_init:
8879 err_policer_link:
8880 free_percpu(group_item->stats);
8881 err_stats_alloc:
8882 kfree(group_item);
8883 return err;
8884 }
8885
8886 static void
8887 devlink_trap_group_unregister(struct devlink *devlink,
8888 const struct devlink_trap_group *group)
8889 {
8890 struct devlink_trap_group_item *group_item;
8891
8892 group_item = devlink_trap_group_item_lookup(devlink, group->name);
8893 if (WARN_ON_ONCE(!group_item))
8894 return;
8895
8896 devlink_trap_group_notify(devlink, group_item,
8897 DEVLINK_CMD_TRAP_GROUP_DEL);
8898 list_del(&group_item->list);
8899 free_percpu(group_item->stats);
8900 kfree(group_item);
8901 }
8902
8903 /**
8904 * devlink_trap_groups_register - Register packet trap groups with devlink.
8905 * @devlink: devlink.
8906 * @groups: Packet trap groups.
8907 * @groups_count: Count of provided packet trap groups.
8908 *
8909 * Return: Non-zero value on failure.
8910 */
8911 int devlink_trap_groups_register(struct devlink *devlink,
8912 const struct devlink_trap_group *groups,
8913 size_t groups_count)
8914 {
8915 int i, err;
8916
8917 mutex_lock(&devlink->lock);
8918 for (i = 0; i < groups_count; i++) {
8919 const struct devlink_trap_group *group = &groups[i];
8920
8921 err = devlink_trap_group_verify(group);
8922 if (err)
8923 goto err_trap_group_verify;
8924
8925 err = devlink_trap_group_register(devlink, group);
8926 if (err)
8927 goto err_trap_group_register;
8928 }
8929 mutex_unlock(&devlink->lock);
8930
8931 return 0;
8932
8933 err_trap_group_register:
8934 err_trap_group_verify:
8935 for (i--; i >= 0; i--)
8936 devlink_trap_group_unregister(devlink, &groups[i]);
8937 mutex_unlock(&devlink->lock);
8938 return err;
8939 }
8940 EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
8941
8942 /**
8943 * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
8944 * @devlink: devlink.
8945 * @groups: Packet trap groups.
8946 * @groups_count: Count of provided packet trap groups.
8947 */
8948 void devlink_trap_groups_unregister(struct devlink *devlink,
8949 const struct devlink_trap_group *groups,
8950 size_t groups_count)
8951 {
8952 int i;
8953
8954 mutex_lock(&devlink->lock);
8955 for (i = groups_count - 1; i >= 0; i--)
8956 devlink_trap_group_unregister(devlink, &groups[i]);
8957 mutex_unlock(&devlink->lock);
8958 }
8959 EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
8960
8961 static void
8962 devlink_trap_policer_notify(struct devlink *devlink,
8963 const struct devlink_trap_policer_item *policer_item,
8964 enum devlink_command cmd)
8965 {
8966 struct sk_buff *msg;
8967 int err;
8968
8969 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
8970 cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
8971
8972 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8973 if (!msg)
8974 return;
8975
8976 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
8977 0, 0);
8978 if (err) {
8979 nlmsg_free(msg);
8980 return;
8981 }
8982
8983 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8984 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8985 }
8986
8987 static int
8988 devlink_trap_policer_register(struct devlink *devlink,
8989 const struct devlink_trap_policer *policer)
8990 {
8991 struct devlink_trap_policer_item *policer_item;
8992 int err;
8993
8994 if (devlink_trap_policer_item_lookup(devlink, policer->id))
8995 return -EEXIST;
8996
8997 policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
8998 if (!policer_item)
8999 return -ENOMEM;
9000
9001 policer_item->policer = policer;
9002 policer_item->rate = policer->init_rate;
9003 policer_item->burst = policer->init_burst;
9004
9005 if (devlink->ops->trap_policer_init) {
9006 err = devlink->ops->trap_policer_init(devlink, policer);
9007 if (err)
9008 goto err_policer_init;
9009 }
9010
9011 list_add_tail(&policer_item->list, &devlink->trap_policer_list);
9012 devlink_trap_policer_notify(devlink, policer_item,
9013 DEVLINK_CMD_TRAP_POLICER_NEW);
9014
9015 return 0;
9016
9017 err_policer_init:
9018 kfree(policer_item);
9019 return err;
9020 }
9021
9022 static void
9023 devlink_trap_policer_unregister(struct devlink *devlink,
9024 const struct devlink_trap_policer *policer)
9025 {
9026 struct devlink_trap_policer_item *policer_item;
9027
9028 policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
9029 if (WARN_ON_ONCE(!policer_item))
9030 return;
9031
9032 devlink_trap_policer_notify(devlink, policer_item,
9033 DEVLINK_CMD_TRAP_POLICER_DEL);
9034 list_del(&policer_item->list);
9035 if (devlink->ops->trap_policer_fini)
9036 devlink->ops->trap_policer_fini(devlink, policer);
9037 kfree(policer_item);
9038 }
9039
9040 /**
9041 * devlink_trap_policers_register - Register packet trap policers with devlink.
9042 * @devlink: devlink.
9043 * @policers: Packet trap policers.
9044 * @policers_count: Count of provided packet trap policers.
9045 *
9046 * Return: Non-zero value on failure.
9047 */
9048 int
9049 devlink_trap_policers_register(struct devlink *devlink,
9050 const struct devlink_trap_policer *policers,
9051 size_t policers_count)
9052 {
9053 int i, err;
9054
9055 mutex_lock(&devlink->lock);
9056 for (i = 0; i < policers_count; i++) {
9057 const struct devlink_trap_policer *policer = &policers[i];
9058
9059 if (WARN_ON(policer->id == 0 ||
9060 policer->max_rate < policer->min_rate ||
9061 policer->max_burst < policer->min_burst)) {
9062 err = -EINVAL;
9063 goto err_trap_policer_verify;
9064 }
9065
9066 err = devlink_trap_policer_register(devlink, policer);
9067 if (err)
9068 goto err_trap_policer_register;
9069 }
9070 mutex_unlock(&devlink->lock);
9071
9072 return 0;
9073
9074 err_trap_policer_register:
9075 err_trap_policer_verify:
9076 for (i--; i >= 0; i--)
9077 devlink_trap_policer_unregister(devlink, &policers[i]);
9078 mutex_unlock(&devlink->lock);
9079 return err;
9080 }
9081 EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
9082
9083 /**
9084 * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
9085 * @devlink: devlink.
9086 * @policers: Packet trap policers.
9087 * @policers_count: Count of provided packet trap policers.
9088 */
9089 void
9090 devlink_trap_policers_unregister(struct devlink *devlink,
9091 const struct devlink_trap_policer *policers,
9092 size_t policers_count)
9093 {
9094 int i;
9095
9096 mutex_lock(&devlink->lock);
9097 for (i = policers_count - 1; i >= 0; i--)
9098 devlink_trap_policer_unregister(devlink, &policers[i]);
9099 mutex_unlock(&devlink->lock);
9100 }
9101 EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
9102
9103 static void __devlink_compat_running_version(struct devlink *devlink,
9104 char *buf, size_t len)
9105 {
9106 const struct nlattr *nlattr;
9107 struct devlink_info_req req;
9108 struct sk_buff *msg;
9109 int rem, err;
9110
9111 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9112 if (!msg)
9113 return;
9114
9115 req.msg = msg;
9116 err = devlink->ops->info_get(devlink, &req, NULL);
9117 if (err)
9118 goto free_msg;
9119
9120 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
9121 const struct nlattr *kv;
9122 int rem_kv;
9123
9124 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
9125 continue;
9126
9127 nla_for_each_nested(kv, nlattr, rem_kv) {
9128 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
9129 continue;
9130
9131 strlcat(buf, nla_data(kv), len);
9132 strlcat(buf, " ", len);
9133 }
9134 }
9135 free_msg:
9136 nlmsg_free(msg);
9137 }
9138
9139 void devlink_compat_running_version(struct net_device *dev,
9140 char *buf, size_t len)
9141 {
9142 struct devlink *devlink;
9143
9144 dev_hold(dev);
9145 rtnl_unlock();
9146
9147 devlink = netdev_to_devlink(dev);
9148 if (!devlink || !devlink->ops->info_get)
9149 goto out;
9150
9151 mutex_lock(&devlink->lock);
9152 __devlink_compat_running_version(devlink, buf, len);
9153 mutex_unlock(&devlink->lock);
9154
9155 out:
9156 rtnl_lock();
9157 dev_put(dev);
9158 }
9159
9160 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
9161 {
9162 struct devlink *devlink;
9163 int ret;
9164
9165 dev_hold(dev);
9166 rtnl_unlock();
9167
9168 devlink = netdev_to_devlink(dev);
9169 if (!devlink || !devlink->ops->flash_update) {
9170 ret = -EOPNOTSUPP;
9171 goto out;
9172 }
9173
9174 mutex_lock(&devlink->lock);
9175 ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
9176 mutex_unlock(&devlink->lock);
9177
9178 out:
9179 rtnl_lock();
9180 dev_put(dev);
9181
9182 return ret;
9183 }
9184
9185 int devlink_compat_phys_port_name_get(struct net_device *dev,
9186 char *name, size_t len)
9187 {
9188 struct devlink_port *devlink_port;
9189
9190 /* RTNL mutex is held here which ensures that devlink_port
9191 * instance cannot disappear in the middle. No need to take
9192 * any devlink lock as only permanent values are accessed.
9193 */
9194 ASSERT_RTNL();
9195
9196 devlink_port = netdev_to_devlink_port(dev);
9197 if (!devlink_port)
9198 return -EOPNOTSUPP;
9199
9200 return __devlink_port_phys_port_name_get(devlink_port, name, len);
9201 }
9202
9203 int devlink_compat_switch_id_get(struct net_device *dev,
9204 struct netdev_phys_item_id *ppid)
9205 {
9206 struct devlink_port *devlink_port;
9207
9208 /* Caller must hold RTNL mutex or reference to dev, which ensures that
9209 * devlink_port instance cannot disappear in the middle. No need to take
9210 * any devlink lock as only permanent values are accessed.
9211 */
9212 devlink_port = netdev_to_devlink_port(dev);
9213 if (!devlink_port || !devlink_port->attrs.switch_port)
9214 return -EOPNOTSUPP;
9215
9216 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
9217
9218 return 0;
9219 }
9220
9221 static void __net_exit devlink_pernet_pre_exit(struct net *net)
9222 {
9223 struct devlink *devlink;
9224 int err;
9225
9226 /* In case network namespace is getting destroyed, reload
9227 * all devlink instances from this namespace into init_net.
9228 */
9229 mutex_lock(&devlink_mutex);
9230 list_for_each_entry(devlink, &devlink_list, list) {
9231 if (net_eq(devlink_net(devlink), net)) {
9232 if (WARN_ON(!devlink_reload_supported(devlink)))
9233 continue;
9234 err = devlink_reload(devlink, &init_net, NULL);
9235 if (err && err != -EOPNOTSUPP)
9236 pr_warn("Failed to reload devlink instance into init_net\n");
9237 }
9238 }
9239 mutex_unlock(&devlink_mutex);
9240 }
9241
9242 static struct pernet_operations devlink_pernet_ops __net_initdata = {
9243 .pre_exit = devlink_pernet_pre_exit,
9244 };
9245
9246 static int __init devlink_init(void)
9247 {
9248 int err;
9249
9250 err = genl_register_family(&devlink_nl_family);
9251 if (err)
9252 goto out;
9253 err = register_pernet_subsys(&devlink_pernet_ops);
9254
9255 out:
9256 WARN_ON(err);
9257 return err;
9258 }
9259
9260 subsys_initcall(devlink_init);
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