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Merge tag 'nfs-for-5.8-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
[mirror_ubuntu-hirsute-kernel.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 struct sk_buff *
3720 devlink_nl_region_notify_build(struct devlink_region *region,
3721 struct devlink_snapshot *snapshot,
3722 enum devlink_command cmd, u32 portid, u32 seq)
3723 {
3724 struct devlink *devlink = region->devlink;
3725 struct sk_buff *msg;
3726 void *hdr;
3727 int err;
3728
3729
3730 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3731 if (!msg)
3732 return ERR_PTR(-ENOMEM);
3733
3734 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd);
3735 if (!hdr) {
3736 err = -EMSGSIZE;
3737 goto out_free_msg;
3738 }
3739
3740 err = devlink_nl_put_handle(msg, devlink);
3741 if (err)
3742 goto out_cancel_msg;
3743
3744 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3745 region->ops->name);
3746 if (err)
3747 goto out_cancel_msg;
3748
3749 if (snapshot) {
3750 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3751 snapshot->id);
3752 if (err)
3753 goto out_cancel_msg;
3754 } else {
3755 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3756 region->size, DEVLINK_ATTR_PAD);
3757 if (err)
3758 goto out_cancel_msg;
3759 }
3760 genlmsg_end(msg, hdr);
3761
3762 return msg;
3763
3764 out_cancel_msg:
3765 genlmsg_cancel(msg, hdr);
3766 out_free_msg:
3767 nlmsg_free(msg);
3768 return ERR_PTR(err);
3769 }
3770
3771 static void devlink_nl_region_notify(struct devlink_region *region,
3772 struct devlink_snapshot *snapshot,
3773 enum devlink_command cmd)
3774 {
3775 struct devlink *devlink = region->devlink;
3776 struct sk_buff *msg;
3777
3778 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3779
3780 msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);
3781 if (IS_ERR(msg))
3782 return;
3783
3784 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3785 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3786 }
3787
3788 /**
3789 * __devlink_snapshot_id_increment - Increment number of snapshots using an id
3790 * @devlink: devlink instance
3791 * @id: the snapshot id
3792 *
3793 * Track when a new snapshot begins using an id. Load the count for the
3794 * given id from the snapshot xarray, increment it, and store it back.
3795 *
3796 * Called when a new snapshot is created with the given id.
3797 *
3798 * The id *must* have been previously allocated by
3799 * devlink_region_snapshot_id_get().
3800 *
3801 * Returns 0 on success, or an error on failure.
3802 */
3803 static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
3804 {
3805 unsigned long count;
3806 void *p;
3807
3808 lockdep_assert_held(&devlink->lock);
3809
3810 p = xa_load(&devlink->snapshot_ids, id);
3811 if (WARN_ON(!p))
3812 return -EINVAL;
3813
3814 if (WARN_ON(!xa_is_value(p)))
3815 return -EINVAL;
3816
3817 count = xa_to_value(p);
3818 count++;
3819
3820 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
3821 GFP_KERNEL));
3822 }
3823
3824 /**
3825 * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id
3826 * @devlink: devlink instance
3827 * @id: the snapshot id
3828 *
3829 * Track when a snapshot is deleted and stops using an id. Load the count
3830 * for the given id from the snapshot xarray, decrement it, and store it
3831 * back.
3832 *
3833 * If the count reaches zero, erase this id from the xarray, freeing it
3834 * up for future re-use by devlink_region_snapshot_id_get().
3835 *
3836 * Called when a snapshot using the given id is deleted, and when the
3837 * initial allocator of the id is finished using it.
3838 */
3839 static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
3840 {
3841 unsigned long count;
3842 void *p;
3843
3844 lockdep_assert_held(&devlink->lock);
3845
3846 p = xa_load(&devlink->snapshot_ids, id);
3847 if (WARN_ON(!p))
3848 return;
3849
3850 if (WARN_ON(!xa_is_value(p)))
3851 return;
3852
3853 count = xa_to_value(p);
3854
3855 if (count > 1) {
3856 count--;
3857 xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
3858 GFP_KERNEL);
3859 } else {
3860 /* If this was the last user, we can erase this id */
3861 xa_erase(&devlink->snapshot_ids, id);
3862 }
3863 }
3864
3865 /**
3866 * __devlink_snapshot_id_insert - Insert a specific snapshot ID
3867 * @devlink: devlink instance
3868 * @id: the snapshot id
3869 *
3870 * Mark the given snapshot id as used by inserting a zero value into the
3871 * snapshot xarray.
3872 *
3873 * This must be called while holding the devlink instance lock. Unlike
3874 * devlink_snapshot_id_get, the initial reference count is zero, not one.
3875 * It is expected that the id will immediately be used before
3876 * releasing the devlink instance lock.
3877 *
3878 * Returns zero on success, or an error code if the snapshot id could not
3879 * be inserted.
3880 */
3881 static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
3882 {
3883 lockdep_assert_held(&devlink->lock);
3884
3885 if (WARN_ON(xa_load(&devlink->snapshot_ids, id)))
3886 return -EEXIST;
3887
3888 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
3889 GFP_KERNEL));
3890 }
3891
3892 /**
3893 * __devlink_region_snapshot_id_get - get snapshot ID
3894 * @devlink: devlink instance
3895 * @id: storage to return snapshot id
3896 *
3897 * Allocates a new snapshot id. Returns zero on success, or a negative
3898 * error on failure. Must be called while holding the devlink instance
3899 * lock.
3900 *
3901 * Snapshot IDs are tracked using an xarray which stores the number of
3902 * users of the snapshot id.
3903 *
3904 * Note that the caller of this function counts as a 'user', in order to
3905 * avoid race conditions. The caller must release its hold on the
3906 * snapshot by using devlink_region_snapshot_id_put.
3907 */
3908 static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
3909 {
3910 lockdep_assert_held(&devlink->lock);
3911
3912 return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
3913 xa_limit_32b, GFP_KERNEL);
3914 }
3915
3916 /**
3917 * __devlink_region_snapshot_create - create a new snapshot
3918 * This will add a new snapshot of a region. The snapshot
3919 * will be stored on the region struct and can be accessed
3920 * from devlink. This is useful for future analyses of snapshots.
3921 * Multiple snapshots can be created on a region.
3922 * The @snapshot_id should be obtained using the getter function.
3923 *
3924 * Must be called only while holding the devlink instance lock.
3925 *
3926 * @region: devlink region of the snapshot
3927 * @data: snapshot data
3928 * @snapshot_id: snapshot id to be created
3929 */
3930 static int
3931 __devlink_region_snapshot_create(struct devlink_region *region,
3932 u8 *data, u32 snapshot_id)
3933 {
3934 struct devlink *devlink = region->devlink;
3935 struct devlink_snapshot *snapshot;
3936 int err;
3937
3938 lockdep_assert_held(&devlink->lock);
3939
3940 /* check if region can hold one more snapshot */
3941 if (region->cur_snapshots == region->max_snapshots)
3942 return -ENOSPC;
3943
3944 if (devlink_region_snapshot_get_by_id(region, snapshot_id))
3945 return -EEXIST;
3946
3947 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
3948 if (!snapshot)
3949 return -ENOMEM;
3950
3951 err = __devlink_snapshot_id_increment(devlink, snapshot_id);
3952 if (err)
3953 goto err_snapshot_id_increment;
3954
3955 snapshot->id = snapshot_id;
3956 snapshot->region = region;
3957 snapshot->data = data;
3958
3959 list_add_tail(&snapshot->list, &region->snapshot_list);
3960
3961 region->cur_snapshots++;
3962
3963 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
3964 return 0;
3965
3966 err_snapshot_id_increment:
3967 kfree(snapshot);
3968 return err;
3969 }
3970
3971 static void devlink_region_snapshot_del(struct devlink_region *region,
3972 struct devlink_snapshot *snapshot)
3973 {
3974 struct devlink *devlink = region->devlink;
3975
3976 lockdep_assert_held(&devlink->lock);
3977
3978 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3979 region->cur_snapshots--;
3980 list_del(&snapshot->list);
3981 region->ops->destructor(snapshot->data);
3982 __devlink_snapshot_id_decrement(devlink, snapshot->id);
3983 kfree(snapshot);
3984 }
3985
3986 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3987 struct genl_info *info)
3988 {
3989 struct devlink *devlink = info->user_ptr[0];
3990 struct devlink_region *region;
3991 const char *region_name;
3992 struct sk_buff *msg;
3993 int err;
3994
3995 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3996 return -EINVAL;
3997
3998 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3999 region = devlink_region_get_by_name(devlink, region_name);
4000 if (!region)
4001 return -EINVAL;
4002
4003 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4004 if (!msg)
4005 return -ENOMEM;
4006
4007 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
4008 info->snd_portid, info->snd_seq, 0,
4009 region);
4010 if (err) {
4011 nlmsg_free(msg);
4012 return err;
4013 }
4014
4015 return genlmsg_reply(msg, info);
4016 }
4017
4018 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
4019 struct netlink_callback *cb)
4020 {
4021 struct devlink_region *region;
4022 struct devlink *devlink;
4023 int start = cb->args[0];
4024 int idx = 0;
4025 int err;
4026
4027 mutex_lock(&devlink_mutex);
4028 list_for_each_entry(devlink, &devlink_list, list) {
4029 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4030 continue;
4031
4032 mutex_lock(&devlink->lock);
4033 list_for_each_entry(region, &devlink->region_list, list) {
4034 if (idx < start) {
4035 idx++;
4036 continue;
4037 }
4038 err = devlink_nl_region_fill(msg, devlink,
4039 DEVLINK_CMD_REGION_GET,
4040 NETLINK_CB(cb->skb).portid,
4041 cb->nlh->nlmsg_seq,
4042 NLM_F_MULTI, region);
4043 if (err) {
4044 mutex_unlock(&devlink->lock);
4045 goto out;
4046 }
4047 idx++;
4048 }
4049 mutex_unlock(&devlink->lock);
4050 }
4051 out:
4052 mutex_unlock(&devlink_mutex);
4053 cb->args[0] = idx;
4054 return msg->len;
4055 }
4056
4057 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
4058 struct genl_info *info)
4059 {
4060 struct devlink *devlink = info->user_ptr[0];
4061 struct devlink_snapshot *snapshot;
4062 struct devlink_region *region;
4063 const char *region_name;
4064 u32 snapshot_id;
4065
4066 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
4067 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
4068 return -EINVAL;
4069
4070 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4071 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4072
4073 region = devlink_region_get_by_name(devlink, region_name);
4074 if (!region)
4075 return -EINVAL;
4076
4077 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4078 if (!snapshot)
4079 return -EINVAL;
4080
4081 devlink_region_snapshot_del(region, snapshot);
4082 return 0;
4083 }
4084
4085 static int
4086 devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
4087 {
4088 struct devlink *devlink = info->user_ptr[0];
4089 struct devlink_snapshot *snapshot;
4090 struct nlattr *snapshot_id_attr;
4091 struct devlink_region *region;
4092 const char *region_name;
4093 u32 snapshot_id;
4094 u8 *data;
4095 int err;
4096
4097 if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) {
4098 NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
4099 return -EINVAL;
4100 }
4101
4102 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4103 region = devlink_region_get_by_name(devlink, region_name);
4104 if (!region) {
4105 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
4106 return -EINVAL;
4107 }
4108
4109 if (!region->ops->snapshot) {
4110 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
4111 return -EOPNOTSUPP;
4112 }
4113
4114 if (region->cur_snapshots == region->max_snapshots) {
4115 NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
4116 return -ENOSPC;
4117 }
4118
4119 snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID];
4120 if (snapshot_id_attr) {
4121 snapshot_id = nla_get_u32(snapshot_id_attr);
4122
4123 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4124 NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
4125 return -EEXIST;
4126 }
4127
4128 err = __devlink_snapshot_id_insert(devlink, snapshot_id);
4129 if (err)
4130 return err;
4131 } else {
4132 err = __devlink_region_snapshot_id_get(devlink, &snapshot_id);
4133 if (err) {
4134 NL_SET_ERR_MSG_MOD(info->extack, "Failed to allocate a new snapshot id");
4135 return err;
4136 }
4137 }
4138
4139 err = region->ops->snapshot(devlink, info->extack, &data);
4140 if (err)
4141 goto err_snapshot_capture;
4142
4143 err = __devlink_region_snapshot_create(region, data, snapshot_id);
4144 if (err)
4145 goto err_snapshot_create;
4146
4147 if (!snapshot_id_attr) {
4148 struct sk_buff *msg;
4149
4150 snapshot = devlink_region_snapshot_get_by_id(region,
4151 snapshot_id);
4152 if (WARN_ON(!snapshot))
4153 return -EINVAL;
4154
4155 msg = devlink_nl_region_notify_build(region, snapshot,
4156 DEVLINK_CMD_REGION_NEW,
4157 info->snd_portid,
4158 info->snd_seq);
4159 err = PTR_ERR_OR_ZERO(msg);
4160 if (err)
4161 goto err_notify;
4162
4163 err = genlmsg_reply(msg, info);
4164 if (err)
4165 goto err_notify;
4166 }
4167
4168 return 0;
4169
4170 err_snapshot_create:
4171 region->ops->destructor(data);
4172 err_snapshot_capture:
4173 __devlink_snapshot_id_decrement(devlink, snapshot_id);
4174 return err;
4175
4176 err_notify:
4177 devlink_region_snapshot_del(region, snapshot);
4178 return err;
4179 }
4180
4181 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
4182 struct devlink *devlink,
4183 u8 *chunk, u32 chunk_size,
4184 u64 addr)
4185 {
4186 struct nlattr *chunk_attr;
4187 int err;
4188
4189 chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
4190 if (!chunk_attr)
4191 return -EINVAL;
4192
4193 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
4194 if (err)
4195 goto nla_put_failure;
4196
4197 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
4198 DEVLINK_ATTR_PAD);
4199 if (err)
4200 goto nla_put_failure;
4201
4202 nla_nest_end(msg, chunk_attr);
4203 return 0;
4204
4205 nla_put_failure:
4206 nla_nest_cancel(msg, chunk_attr);
4207 return err;
4208 }
4209
4210 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
4211
4212 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
4213 struct devlink *devlink,
4214 struct devlink_region *region,
4215 struct nlattr **attrs,
4216 u64 start_offset,
4217 u64 end_offset,
4218 u64 *new_offset)
4219 {
4220 struct devlink_snapshot *snapshot;
4221 u64 curr_offset = start_offset;
4222 u32 snapshot_id;
4223 int err = 0;
4224
4225 *new_offset = start_offset;
4226
4227 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4228 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4229 if (!snapshot)
4230 return -EINVAL;
4231
4232 while (curr_offset < end_offset) {
4233 u32 data_size;
4234 u8 *data;
4235
4236 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
4237 data_size = end_offset - curr_offset;
4238 else
4239 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
4240
4241 data = &snapshot->data[curr_offset];
4242 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
4243 data, data_size,
4244 curr_offset);
4245 if (err)
4246 break;
4247
4248 curr_offset += data_size;
4249 }
4250 *new_offset = curr_offset;
4251
4252 return err;
4253 }
4254
4255 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
4256 struct netlink_callback *cb)
4257 {
4258 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
4259 u64 ret_offset, start_offset, end_offset = U64_MAX;
4260 struct nlattr **attrs = info->attrs;
4261 struct devlink_region *region;
4262 struct nlattr *chunks_attr;
4263 const char *region_name;
4264 struct devlink *devlink;
4265 void *hdr;
4266 int err;
4267
4268 start_offset = *((u64 *)&cb->args[0]);
4269
4270 mutex_lock(&devlink_mutex);
4271 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4272 if (IS_ERR(devlink)) {
4273 err = PTR_ERR(devlink);
4274 goto out_dev;
4275 }
4276
4277 mutex_lock(&devlink->lock);
4278
4279 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
4280 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4281 err = -EINVAL;
4282 goto out_unlock;
4283 }
4284
4285 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
4286 region = devlink_region_get_by_name(devlink, region_name);
4287 if (!region) {
4288 err = -EINVAL;
4289 goto out_unlock;
4290 }
4291
4292 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4293 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4294 if (!start_offset)
4295 start_offset =
4296 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4297
4298 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4299 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4300 }
4301
4302 if (end_offset > region->size)
4303 end_offset = region->size;
4304
4305 /* return 0 if there is no further data to read */
4306 if (start_offset == end_offset) {
4307 err = 0;
4308 goto out_unlock;
4309 }
4310
4311 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4312 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
4313 DEVLINK_CMD_REGION_READ);
4314 if (!hdr) {
4315 err = -EMSGSIZE;
4316 goto out_unlock;
4317 }
4318
4319 err = devlink_nl_put_handle(skb, devlink);
4320 if (err)
4321 goto nla_put_failure;
4322
4323 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
4324 if (err)
4325 goto nla_put_failure;
4326
4327 chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
4328 if (!chunks_attr) {
4329 err = -EMSGSIZE;
4330 goto nla_put_failure;
4331 }
4332
4333 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4334 region, attrs,
4335 start_offset,
4336 end_offset, &ret_offset);
4337
4338 if (err && err != -EMSGSIZE)
4339 goto nla_put_failure;
4340
4341 /* Check if there was any progress done to prevent infinite loop */
4342 if (ret_offset == start_offset) {
4343 err = -EINVAL;
4344 goto nla_put_failure;
4345 }
4346
4347 *((u64 *)&cb->args[0]) = ret_offset;
4348
4349 nla_nest_end(skb, chunks_attr);
4350 genlmsg_end(skb, hdr);
4351 mutex_unlock(&devlink->lock);
4352 mutex_unlock(&devlink_mutex);
4353
4354 return skb->len;
4355
4356 nla_put_failure:
4357 genlmsg_cancel(skb, hdr);
4358 out_unlock:
4359 mutex_unlock(&devlink->lock);
4360 out_dev:
4361 mutex_unlock(&devlink_mutex);
4362 return err;
4363 }
4364
4365 struct devlink_info_req {
4366 struct sk_buff *msg;
4367 };
4368
4369 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4370 {
4371 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4372 }
4373 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4374
4375 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4376 {
4377 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4378 }
4379 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4380
4381 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4382 const char *version_name,
4383 const char *version_value)
4384 {
4385 struct nlattr *nest;
4386 int err;
4387
4388 nest = nla_nest_start_noflag(req->msg, attr);
4389 if (!nest)
4390 return -EMSGSIZE;
4391
4392 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4393 version_name);
4394 if (err)
4395 goto nla_put_failure;
4396
4397 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4398 version_value);
4399 if (err)
4400 goto nla_put_failure;
4401
4402 nla_nest_end(req->msg, nest);
4403
4404 return 0;
4405
4406 nla_put_failure:
4407 nla_nest_cancel(req->msg, nest);
4408 return err;
4409 }
4410
4411 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4412 const char *version_name,
4413 const char *version_value)
4414 {
4415 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4416 version_name, version_value);
4417 }
4418 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4419
4420 int devlink_info_version_stored_put(struct devlink_info_req *req,
4421 const char *version_name,
4422 const char *version_value)
4423 {
4424 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4425 version_name, version_value);
4426 }
4427 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4428
4429 int devlink_info_version_running_put(struct devlink_info_req *req,
4430 const char *version_name,
4431 const char *version_value)
4432 {
4433 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4434 version_name, version_value);
4435 }
4436 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4437
4438 static int
4439 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4440 enum devlink_command cmd, u32 portid,
4441 u32 seq, int flags, struct netlink_ext_ack *extack)
4442 {
4443 struct devlink_info_req req;
4444 void *hdr;
4445 int err;
4446
4447 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4448 if (!hdr)
4449 return -EMSGSIZE;
4450
4451 err = -EMSGSIZE;
4452 if (devlink_nl_put_handle(msg, devlink))
4453 goto err_cancel_msg;
4454
4455 req.msg = msg;
4456 err = devlink->ops->info_get(devlink, &req, extack);
4457 if (err)
4458 goto err_cancel_msg;
4459
4460 genlmsg_end(msg, hdr);
4461 return 0;
4462
4463 err_cancel_msg:
4464 genlmsg_cancel(msg, hdr);
4465 return err;
4466 }
4467
4468 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4469 struct genl_info *info)
4470 {
4471 struct devlink *devlink = info->user_ptr[0];
4472 struct sk_buff *msg;
4473 int err;
4474
4475 if (!devlink->ops->info_get)
4476 return -EOPNOTSUPP;
4477
4478 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4479 if (!msg)
4480 return -ENOMEM;
4481
4482 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4483 info->snd_portid, info->snd_seq, 0,
4484 info->extack);
4485 if (err) {
4486 nlmsg_free(msg);
4487 return err;
4488 }
4489
4490 return genlmsg_reply(msg, info);
4491 }
4492
4493 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4494 struct netlink_callback *cb)
4495 {
4496 struct devlink *devlink;
4497 int start = cb->args[0];
4498 int idx = 0;
4499 int err = 0;
4500
4501 mutex_lock(&devlink_mutex);
4502 list_for_each_entry(devlink, &devlink_list, list) {
4503 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4504 continue;
4505 if (idx < start) {
4506 idx++;
4507 continue;
4508 }
4509
4510 if (!devlink->ops->info_get) {
4511 idx++;
4512 continue;
4513 }
4514
4515 mutex_lock(&devlink->lock);
4516 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4517 NETLINK_CB(cb->skb).portid,
4518 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4519 cb->extack);
4520 mutex_unlock(&devlink->lock);
4521 if (err && err != -EOPNOTSUPP)
4522 break;
4523 idx++;
4524 }
4525 mutex_unlock(&devlink_mutex);
4526
4527 if (err != -EMSGSIZE)
4528 return err;
4529
4530 cb->args[0] = idx;
4531 return msg->len;
4532 }
4533
4534 struct devlink_fmsg_item {
4535 struct list_head list;
4536 int attrtype;
4537 u8 nla_type;
4538 u16 len;
4539 int value[];
4540 };
4541
4542 struct devlink_fmsg {
4543 struct list_head item_list;
4544 bool putting_binary; /* This flag forces enclosing of binary data
4545 * in an array brackets. It forces using
4546 * of designated API:
4547 * devlink_fmsg_binary_pair_nest_start()
4548 * devlink_fmsg_binary_pair_nest_end()
4549 */
4550 };
4551
4552 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4553 {
4554 struct devlink_fmsg *fmsg;
4555
4556 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4557 if (!fmsg)
4558 return NULL;
4559
4560 INIT_LIST_HEAD(&fmsg->item_list);
4561
4562 return fmsg;
4563 }
4564
4565 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4566 {
4567 struct devlink_fmsg_item *item, *tmp;
4568
4569 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4570 list_del(&item->list);
4571 kfree(item);
4572 }
4573 kfree(fmsg);
4574 }
4575
4576 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4577 int attrtype)
4578 {
4579 struct devlink_fmsg_item *item;
4580
4581 item = kzalloc(sizeof(*item), GFP_KERNEL);
4582 if (!item)
4583 return -ENOMEM;
4584
4585 item->attrtype = attrtype;
4586 list_add_tail(&item->list, &fmsg->item_list);
4587
4588 return 0;
4589 }
4590
4591 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4592 {
4593 if (fmsg->putting_binary)
4594 return -EINVAL;
4595
4596 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4597 }
4598 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4599
4600 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4601 {
4602 if (fmsg->putting_binary)
4603 return -EINVAL;
4604
4605 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4606 }
4607
4608 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4609 {
4610 if (fmsg->putting_binary)
4611 return -EINVAL;
4612
4613 return devlink_fmsg_nest_end(fmsg);
4614 }
4615 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4616
4617 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4618
4619 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4620 {
4621 struct devlink_fmsg_item *item;
4622
4623 if (fmsg->putting_binary)
4624 return -EINVAL;
4625
4626 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4627 return -EMSGSIZE;
4628
4629 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4630 if (!item)
4631 return -ENOMEM;
4632
4633 item->nla_type = NLA_NUL_STRING;
4634 item->len = strlen(name) + 1;
4635 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4636 memcpy(&item->value, name, item->len);
4637 list_add_tail(&item->list, &fmsg->item_list);
4638
4639 return 0;
4640 }
4641
4642 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4643 {
4644 int err;
4645
4646 if (fmsg->putting_binary)
4647 return -EINVAL;
4648
4649 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4650 if (err)
4651 return err;
4652
4653 err = devlink_fmsg_put_name(fmsg, name);
4654 if (err)
4655 return err;
4656
4657 return 0;
4658 }
4659 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4660
4661 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4662 {
4663 if (fmsg->putting_binary)
4664 return -EINVAL;
4665
4666 return devlink_fmsg_nest_end(fmsg);
4667 }
4668 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4669
4670 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4671 const char *name)
4672 {
4673 int err;
4674
4675 if (fmsg->putting_binary)
4676 return -EINVAL;
4677
4678 err = devlink_fmsg_pair_nest_start(fmsg, name);
4679 if (err)
4680 return err;
4681
4682 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4683 if (err)
4684 return err;
4685
4686 return 0;
4687 }
4688 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4689
4690 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4691 {
4692 int err;
4693
4694 if (fmsg->putting_binary)
4695 return -EINVAL;
4696
4697 err = devlink_fmsg_nest_end(fmsg);
4698 if (err)
4699 return err;
4700
4701 err = devlink_fmsg_nest_end(fmsg);
4702 if (err)
4703 return err;
4704
4705 return 0;
4706 }
4707 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4708
4709 int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
4710 const char *name)
4711 {
4712 int err;
4713
4714 err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4715 if (err)
4716 return err;
4717
4718 fmsg->putting_binary = true;
4719 return err;
4720 }
4721 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
4722
4723 int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
4724 {
4725 if (!fmsg->putting_binary)
4726 return -EINVAL;
4727
4728 fmsg->putting_binary = false;
4729 return devlink_fmsg_arr_pair_nest_end(fmsg);
4730 }
4731 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
4732
4733 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4734 const void *value, u16 value_len,
4735 u8 value_nla_type)
4736 {
4737 struct devlink_fmsg_item *item;
4738
4739 if (value_len > DEVLINK_FMSG_MAX_SIZE)
4740 return -EMSGSIZE;
4741
4742 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4743 if (!item)
4744 return -ENOMEM;
4745
4746 item->nla_type = value_nla_type;
4747 item->len = value_len;
4748 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4749 memcpy(&item->value, value, item->len);
4750 list_add_tail(&item->list, &fmsg->item_list);
4751
4752 return 0;
4753 }
4754
4755 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4756 {
4757 if (fmsg->putting_binary)
4758 return -EINVAL;
4759
4760 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4761 }
4762 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4763
4764 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4765 {
4766 if (fmsg->putting_binary)
4767 return -EINVAL;
4768
4769 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4770 }
4771 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4772
4773 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4774 {
4775 if (fmsg->putting_binary)
4776 return -EINVAL;
4777
4778 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4779 }
4780 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4781
4782 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4783 {
4784 if (fmsg->putting_binary)
4785 return -EINVAL;
4786
4787 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4788 }
4789 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4790
4791 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4792 {
4793 if (fmsg->putting_binary)
4794 return -EINVAL;
4795
4796 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4797 NLA_NUL_STRING);
4798 }
4799 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4800
4801 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4802 u16 value_len)
4803 {
4804 if (!fmsg->putting_binary)
4805 return -EINVAL;
4806
4807 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4808 }
4809 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4810
4811 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4812 bool value)
4813 {
4814 int err;
4815
4816 err = devlink_fmsg_pair_nest_start(fmsg, name);
4817 if (err)
4818 return err;
4819
4820 err = devlink_fmsg_bool_put(fmsg, value);
4821 if (err)
4822 return err;
4823
4824 err = devlink_fmsg_pair_nest_end(fmsg);
4825 if (err)
4826 return err;
4827
4828 return 0;
4829 }
4830 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4831
4832 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4833 u8 value)
4834 {
4835 int err;
4836
4837 err = devlink_fmsg_pair_nest_start(fmsg, name);
4838 if (err)
4839 return err;
4840
4841 err = devlink_fmsg_u8_put(fmsg, value);
4842 if (err)
4843 return err;
4844
4845 err = devlink_fmsg_pair_nest_end(fmsg);
4846 if (err)
4847 return err;
4848
4849 return 0;
4850 }
4851 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4852
4853 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4854 u32 value)
4855 {
4856 int err;
4857
4858 err = devlink_fmsg_pair_nest_start(fmsg, name);
4859 if (err)
4860 return err;
4861
4862 err = devlink_fmsg_u32_put(fmsg, value);
4863 if (err)
4864 return err;
4865
4866 err = devlink_fmsg_pair_nest_end(fmsg);
4867 if (err)
4868 return err;
4869
4870 return 0;
4871 }
4872 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4873
4874 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4875 u64 value)
4876 {
4877 int err;
4878
4879 err = devlink_fmsg_pair_nest_start(fmsg, name);
4880 if (err)
4881 return err;
4882
4883 err = devlink_fmsg_u64_put(fmsg, value);
4884 if (err)
4885 return err;
4886
4887 err = devlink_fmsg_pair_nest_end(fmsg);
4888 if (err)
4889 return err;
4890
4891 return 0;
4892 }
4893 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4894
4895 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4896 const char *value)
4897 {
4898 int err;
4899
4900 err = devlink_fmsg_pair_nest_start(fmsg, name);
4901 if (err)
4902 return err;
4903
4904 err = devlink_fmsg_string_put(fmsg, value);
4905 if (err)
4906 return err;
4907
4908 err = devlink_fmsg_pair_nest_end(fmsg);
4909 if (err)
4910 return err;
4911
4912 return 0;
4913 }
4914 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4915
4916 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4917 const void *value, u32 value_len)
4918 {
4919 u32 data_size;
4920 int end_err;
4921 u32 offset;
4922 int err;
4923
4924 err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
4925 if (err)
4926 return err;
4927
4928 for (offset = 0; offset < value_len; offset += data_size) {
4929 data_size = value_len - offset;
4930 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4931 data_size = DEVLINK_FMSG_MAX_SIZE;
4932 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4933 if (err)
4934 break;
4935 /* Exit from loop with a break (instead of
4936 * return) to make sure putting_binary is turned off in
4937 * devlink_fmsg_binary_pair_nest_end
4938 */
4939 }
4940
4941 end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
4942 if (end_err)
4943 err = end_err;
4944
4945 return err;
4946 }
4947 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4948
4949 static int
4950 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4951 {
4952 switch (msg->nla_type) {
4953 case NLA_FLAG:
4954 case NLA_U8:
4955 case NLA_U32:
4956 case NLA_U64:
4957 case NLA_NUL_STRING:
4958 case NLA_BINARY:
4959 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4960 msg->nla_type);
4961 default:
4962 return -EINVAL;
4963 }
4964 }
4965
4966 static int
4967 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4968 {
4969 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4970 u8 tmp;
4971
4972 switch (msg->nla_type) {
4973 case NLA_FLAG:
4974 /* Always provide flag data, regardless of its value */
4975 tmp = *(bool *) msg->value;
4976
4977 return nla_put_u8(skb, attrtype, tmp);
4978 case NLA_U8:
4979 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4980 case NLA_U32:
4981 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4982 case NLA_U64:
4983 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4984 DEVLINK_ATTR_PAD);
4985 case NLA_NUL_STRING:
4986 return nla_put_string(skb, attrtype, (char *) &msg->value);
4987 case NLA_BINARY:
4988 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4989 default:
4990 return -EINVAL;
4991 }
4992 }
4993
4994 static int
4995 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4996 int *start)
4997 {
4998 struct devlink_fmsg_item *item;
4999 struct nlattr *fmsg_nlattr;
5000 int i = 0;
5001 int err;
5002
5003 fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
5004 if (!fmsg_nlattr)
5005 return -EMSGSIZE;
5006
5007 list_for_each_entry(item, &fmsg->item_list, list) {
5008 if (i < *start) {
5009 i++;
5010 continue;
5011 }
5012
5013 switch (item->attrtype) {
5014 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
5015 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
5016 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
5017 case DEVLINK_ATTR_FMSG_NEST_END:
5018 err = nla_put_flag(skb, item->attrtype);
5019 break;
5020 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
5021 err = devlink_fmsg_item_fill_type(item, skb);
5022 if (err)
5023 break;
5024 err = devlink_fmsg_item_fill_data(item, skb);
5025 break;
5026 case DEVLINK_ATTR_FMSG_OBJ_NAME:
5027 err = nla_put_string(skb, item->attrtype,
5028 (char *) &item->value);
5029 break;
5030 default:
5031 err = -EINVAL;
5032 break;
5033 }
5034 if (!err)
5035 *start = ++i;
5036 else
5037 break;
5038 }
5039
5040 nla_nest_end(skb, fmsg_nlattr);
5041 return err;
5042 }
5043
5044 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
5045 struct genl_info *info,
5046 enum devlink_command cmd, int flags)
5047 {
5048 struct nlmsghdr *nlh;
5049 struct sk_buff *skb;
5050 bool last = false;
5051 int index = 0;
5052 void *hdr;
5053 int err;
5054
5055 while (!last) {
5056 int tmp_index = index;
5057
5058 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5059 if (!skb)
5060 return -ENOMEM;
5061
5062 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
5063 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
5064 if (!hdr) {
5065 err = -EMSGSIZE;
5066 goto nla_put_failure;
5067 }
5068
5069 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5070 if (!err)
5071 last = true;
5072 else if (err != -EMSGSIZE || tmp_index == index)
5073 goto nla_put_failure;
5074
5075 genlmsg_end(skb, hdr);
5076 err = genlmsg_reply(skb, info);
5077 if (err)
5078 return err;
5079 }
5080
5081 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5082 if (!skb)
5083 return -ENOMEM;
5084 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
5085 NLMSG_DONE, 0, flags | NLM_F_MULTI);
5086 if (!nlh) {
5087 err = -EMSGSIZE;
5088 goto nla_put_failure;
5089 }
5090
5091 return genlmsg_reply(skb, info);
5092
5093 nla_put_failure:
5094 nlmsg_free(skb);
5095 return err;
5096 }
5097
5098 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5099 struct netlink_callback *cb,
5100 enum devlink_command cmd)
5101 {
5102 int index = cb->args[0];
5103 int tmp_index = index;
5104 void *hdr;
5105 int err;
5106
5107 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
5108 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
5109 if (!hdr) {
5110 err = -EMSGSIZE;
5111 goto nla_put_failure;
5112 }
5113
5114 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5115 if ((err && err != -EMSGSIZE) || tmp_index == index)
5116 goto nla_put_failure;
5117
5118 cb->args[0] = index;
5119 genlmsg_end(skb, hdr);
5120 return skb->len;
5121
5122 nla_put_failure:
5123 genlmsg_cancel(skb, hdr);
5124 return err;
5125 }
5126
5127 struct devlink_health_reporter {
5128 struct list_head list;
5129 void *priv;
5130 const struct devlink_health_reporter_ops *ops;
5131 struct devlink *devlink;
5132 struct devlink_fmsg *dump_fmsg;
5133 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
5134 u64 graceful_period;
5135 bool auto_recover;
5136 bool auto_dump;
5137 u8 health_state;
5138 u64 dump_ts;
5139 u64 dump_real_ts;
5140 u64 error_count;
5141 u64 recovery_count;
5142 u64 last_recovery_ts;
5143 refcount_t refcount;
5144 };
5145
5146 void *
5147 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
5148 {
5149 return reporter->priv;
5150 }
5151 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
5152
5153 static struct devlink_health_reporter *
5154 devlink_health_reporter_find_by_name(struct devlink *devlink,
5155 const char *reporter_name)
5156 {
5157 struct devlink_health_reporter *reporter;
5158
5159 lockdep_assert_held(&devlink->reporters_lock);
5160 list_for_each_entry(reporter, &devlink->reporter_list, list)
5161 if (!strcmp(reporter->ops->name, reporter_name))
5162 return reporter;
5163 return NULL;
5164 }
5165
5166 /**
5167 * devlink_health_reporter_create - create devlink health reporter
5168 *
5169 * @devlink: devlink
5170 * @ops: ops
5171 * @graceful_period: to avoid recovery loops, in msecs
5172 * @priv: priv
5173 */
5174 struct devlink_health_reporter *
5175 devlink_health_reporter_create(struct devlink *devlink,
5176 const struct devlink_health_reporter_ops *ops,
5177 u64 graceful_period, void *priv)
5178 {
5179 struct devlink_health_reporter *reporter;
5180
5181 mutex_lock(&devlink->reporters_lock);
5182 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
5183 reporter = ERR_PTR(-EEXIST);
5184 goto unlock;
5185 }
5186
5187 if (WARN_ON(graceful_period && !ops->recover)) {
5188 reporter = ERR_PTR(-EINVAL);
5189 goto unlock;
5190 }
5191
5192 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
5193 if (!reporter) {
5194 reporter = ERR_PTR(-ENOMEM);
5195 goto unlock;
5196 }
5197
5198 reporter->priv = priv;
5199 reporter->ops = ops;
5200 reporter->devlink = devlink;
5201 reporter->graceful_period = graceful_period;
5202 reporter->auto_recover = !!ops->recover;
5203 reporter->auto_dump = !!ops->dump;
5204 mutex_init(&reporter->dump_lock);
5205 refcount_set(&reporter->refcount, 1);
5206 list_add_tail(&reporter->list, &devlink->reporter_list);
5207 unlock:
5208 mutex_unlock(&devlink->reporters_lock);
5209 return reporter;
5210 }
5211 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
5212
5213 /**
5214 * devlink_health_reporter_destroy - destroy devlink health reporter
5215 *
5216 * @reporter: devlink health reporter to destroy
5217 */
5218 void
5219 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5220 {
5221 mutex_lock(&reporter->devlink->reporters_lock);
5222 list_del(&reporter->list);
5223 mutex_unlock(&reporter->devlink->reporters_lock);
5224 while (refcount_read(&reporter->refcount) > 1)
5225 msleep(100);
5226 mutex_destroy(&reporter->dump_lock);
5227 if (reporter->dump_fmsg)
5228 devlink_fmsg_free(reporter->dump_fmsg);
5229 kfree(reporter);
5230 }
5231 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
5232
5233 static int
5234 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5235 struct devlink *devlink,
5236 struct devlink_health_reporter *reporter,
5237 enum devlink_command cmd, u32 portid,
5238 u32 seq, int flags)
5239 {
5240 struct nlattr *reporter_attr;
5241 void *hdr;
5242
5243 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5244 if (!hdr)
5245 return -EMSGSIZE;
5246
5247 if (devlink_nl_put_handle(msg, devlink))
5248 goto genlmsg_cancel;
5249
5250 reporter_attr = nla_nest_start_noflag(msg,
5251 DEVLINK_ATTR_HEALTH_REPORTER);
5252 if (!reporter_attr)
5253 goto genlmsg_cancel;
5254 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5255 reporter->ops->name))
5256 goto reporter_nest_cancel;
5257 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5258 reporter->health_state))
5259 goto reporter_nest_cancel;
5260 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5261 reporter->error_count, DEVLINK_ATTR_PAD))
5262 goto reporter_nest_cancel;
5263 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5264 reporter->recovery_count, DEVLINK_ATTR_PAD))
5265 goto reporter_nest_cancel;
5266 if (reporter->ops->recover &&
5267 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5268 reporter->graceful_period,
5269 DEVLINK_ATTR_PAD))
5270 goto reporter_nest_cancel;
5271 if (reporter->ops->recover &&
5272 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5273 reporter->auto_recover))
5274 goto reporter_nest_cancel;
5275 if (reporter->dump_fmsg &&
5276 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5277 jiffies_to_msecs(reporter->dump_ts),
5278 DEVLINK_ATTR_PAD))
5279 goto reporter_nest_cancel;
5280 if (reporter->dump_fmsg &&
5281 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
5282 reporter->dump_real_ts, DEVLINK_ATTR_PAD))
5283 goto reporter_nest_cancel;
5284 if (reporter->ops->dump &&
5285 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
5286 reporter->auto_dump))
5287 goto reporter_nest_cancel;
5288
5289 nla_nest_end(msg, reporter_attr);
5290 genlmsg_end(msg, hdr);
5291 return 0;
5292
5293 reporter_nest_cancel:
5294 nla_nest_end(msg, reporter_attr);
5295 genlmsg_cancel:
5296 genlmsg_cancel(msg, hdr);
5297 return -EMSGSIZE;
5298 }
5299
5300 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
5301 enum devlink_command cmd)
5302 {
5303 struct sk_buff *msg;
5304 int err;
5305
5306 WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5307
5308 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5309 if (!msg)
5310 return;
5311
5312 err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
5313 reporter, cmd, 0, 0, 0);
5314 if (err) {
5315 nlmsg_free(msg);
5316 return;
5317 }
5318
5319 genlmsg_multicast_netns(&devlink_nl_family,
5320 devlink_net(reporter->devlink),
5321 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
5322 }
5323
5324 void
5325 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
5326 {
5327 reporter->recovery_count++;
5328 reporter->last_recovery_ts = jiffies;
5329 }
5330 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
5331
5332 static int
5333 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
5334 void *priv_ctx, struct netlink_ext_ack *extack)
5335 {
5336 int err;
5337
5338 if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
5339 return 0;
5340
5341 if (!reporter->ops->recover)
5342 return -EOPNOTSUPP;
5343
5344 err = reporter->ops->recover(reporter, priv_ctx, extack);
5345 if (err)
5346 return err;
5347
5348 devlink_health_reporter_recovery_done(reporter);
5349 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
5350 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5351
5352 return 0;
5353 }
5354
5355 static void
5356 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
5357 {
5358 if (!reporter->dump_fmsg)
5359 return;
5360 devlink_fmsg_free(reporter->dump_fmsg);
5361 reporter->dump_fmsg = NULL;
5362 }
5363
5364 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
5365 void *priv_ctx,
5366 struct netlink_ext_ack *extack)
5367 {
5368 int err;
5369
5370 if (!reporter->ops->dump)
5371 return 0;
5372
5373 if (reporter->dump_fmsg)
5374 return 0;
5375
5376 reporter->dump_fmsg = devlink_fmsg_alloc();
5377 if (!reporter->dump_fmsg) {
5378 err = -ENOMEM;
5379 return err;
5380 }
5381
5382 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
5383 if (err)
5384 goto dump_err;
5385
5386 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
5387 priv_ctx, extack);
5388 if (err)
5389 goto dump_err;
5390
5391 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
5392 if (err)
5393 goto dump_err;
5394
5395 reporter->dump_ts = jiffies;
5396 reporter->dump_real_ts = ktime_get_real_ns();
5397
5398 return 0;
5399
5400 dump_err:
5401 devlink_health_dump_clear(reporter);
5402 return err;
5403 }
5404
5405 int devlink_health_report(struct devlink_health_reporter *reporter,
5406 const char *msg, void *priv_ctx)
5407 {
5408 enum devlink_health_reporter_state prev_health_state;
5409 struct devlink *devlink = reporter->devlink;
5410 unsigned long recover_ts_threshold;
5411
5412 /* write a log message of the current error */
5413 WARN_ON(!msg);
5414 trace_devlink_health_report(devlink, reporter->ops->name, msg);
5415 reporter->error_count++;
5416 prev_health_state = reporter->health_state;
5417 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5418 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5419
5420 /* abort if the previous error wasn't recovered */
5421 recover_ts_threshold = reporter->last_recovery_ts +
5422 msecs_to_jiffies(reporter->graceful_period);
5423 if (reporter->auto_recover &&
5424 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
5425 (reporter->last_recovery_ts && reporter->recovery_count &&
5426 time_is_after_jiffies(recover_ts_threshold)))) {
5427 trace_devlink_health_recover_aborted(devlink,
5428 reporter->ops->name,
5429 reporter->health_state,
5430 jiffies -
5431 reporter->last_recovery_ts);
5432 return -ECANCELED;
5433 }
5434
5435 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5436
5437 if (reporter->auto_dump) {
5438 mutex_lock(&reporter->dump_lock);
5439 /* store current dump of current error, for later analysis */
5440 devlink_health_do_dump(reporter, priv_ctx, NULL);
5441 mutex_unlock(&reporter->dump_lock);
5442 }
5443
5444 if (reporter->auto_recover)
5445 return devlink_health_reporter_recover(reporter,
5446 priv_ctx, NULL);
5447
5448 return 0;
5449 }
5450 EXPORT_SYMBOL_GPL(devlink_health_report);
5451
5452 static struct devlink_health_reporter *
5453 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
5454 struct nlattr **attrs)
5455 {
5456 struct devlink_health_reporter *reporter;
5457 char *reporter_name;
5458
5459 if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
5460 return NULL;
5461
5462 reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
5463 mutex_lock(&devlink->reporters_lock);
5464 reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
5465 if (reporter)
5466 refcount_inc(&reporter->refcount);
5467 mutex_unlock(&devlink->reporters_lock);
5468 return reporter;
5469 }
5470
5471 static struct devlink_health_reporter *
5472 devlink_health_reporter_get_from_info(struct devlink *devlink,
5473 struct genl_info *info)
5474 {
5475 return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
5476 }
5477
5478 static struct devlink_health_reporter *
5479 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
5480 {
5481 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5482 struct devlink_health_reporter *reporter;
5483 struct nlattr **attrs = info->attrs;
5484 struct devlink *devlink;
5485
5486 mutex_lock(&devlink_mutex);
5487 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5488 if (IS_ERR(devlink))
5489 goto unlock;
5490
5491 reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5492 mutex_unlock(&devlink_mutex);
5493 return reporter;
5494 unlock:
5495 mutex_unlock(&devlink_mutex);
5496 return NULL;
5497 }
5498
5499 static void
5500 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5501 {
5502 refcount_dec(&reporter->refcount);
5503 }
5504
5505 void
5506 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
5507 enum devlink_health_reporter_state state)
5508 {
5509 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
5510 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
5511 return;
5512
5513 if (reporter->health_state == state)
5514 return;
5515
5516 reporter->health_state = state;
5517 trace_devlink_health_reporter_state_update(reporter->devlink,
5518 reporter->ops->name, state);
5519 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5520 }
5521 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
5522
5523 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5524 struct genl_info *info)
5525 {
5526 struct devlink *devlink = info->user_ptr[0];
5527 struct devlink_health_reporter *reporter;
5528 struct sk_buff *msg;
5529 int err;
5530
5531 reporter = devlink_health_reporter_get_from_info(devlink, info);
5532 if (!reporter)
5533 return -EINVAL;
5534
5535 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5536 if (!msg) {
5537 err = -ENOMEM;
5538 goto out;
5539 }
5540
5541 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5542 DEVLINK_CMD_HEALTH_REPORTER_GET,
5543 info->snd_portid, info->snd_seq,
5544 0);
5545 if (err) {
5546 nlmsg_free(msg);
5547 goto out;
5548 }
5549
5550 err = genlmsg_reply(msg, info);
5551 out:
5552 devlink_health_reporter_put(reporter);
5553 return err;
5554 }
5555
5556 static int
5557 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5558 struct netlink_callback *cb)
5559 {
5560 struct devlink_health_reporter *reporter;
5561 struct devlink *devlink;
5562 int start = cb->args[0];
5563 int idx = 0;
5564 int err;
5565
5566 mutex_lock(&devlink_mutex);
5567 list_for_each_entry(devlink, &devlink_list, list) {
5568 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5569 continue;
5570 mutex_lock(&devlink->reporters_lock);
5571 list_for_each_entry(reporter, &devlink->reporter_list,
5572 list) {
5573 if (idx < start) {
5574 idx++;
5575 continue;
5576 }
5577 err = devlink_nl_health_reporter_fill(msg, devlink,
5578 reporter,
5579 DEVLINK_CMD_HEALTH_REPORTER_GET,
5580 NETLINK_CB(cb->skb).portid,
5581 cb->nlh->nlmsg_seq,
5582 NLM_F_MULTI);
5583 if (err) {
5584 mutex_unlock(&devlink->reporters_lock);
5585 goto out;
5586 }
5587 idx++;
5588 }
5589 mutex_unlock(&devlink->reporters_lock);
5590 }
5591 out:
5592 mutex_unlock(&devlink_mutex);
5593
5594 cb->args[0] = idx;
5595 return msg->len;
5596 }
5597
5598 static int
5599 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5600 struct genl_info *info)
5601 {
5602 struct devlink *devlink = info->user_ptr[0];
5603 struct devlink_health_reporter *reporter;
5604 int err;
5605
5606 reporter = devlink_health_reporter_get_from_info(devlink, info);
5607 if (!reporter)
5608 return -EINVAL;
5609
5610 if (!reporter->ops->recover &&
5611 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5612 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5613 err = -EOPNOTSUPP;
5614 goto out;
5615 }
5616 if (!reporter->ops->dump &&
5617 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
5618 err = -EOPNOTSUPP;
5619 goto out;
5620 }
5621
5622 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5623 reporter->graceful_period =
5624 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5625
5626 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5627 reporter->auto_recover =
5628 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5629
5630 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
5631 reporter->auto_dump =
5632 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
5633
5634 devlink_health_reporter_put(reporter);
5635 return 0;
5636 out:
5637 devlink_health_reporter_put(reporter);
5638 return err;
5639 }
5640
5641 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5642 struct genl_info *info)
5643 {
5644 struct devlink *devlink = info->user_ptr[0];
5645 struct devlink_health_reporter *reporter;
5646 int err;
5647
5648 reporter = devlink_health_reporter_get_from_info(devlink, info);
5649 if (!reporter)
5650 return -EINVAL;
5651
5652 err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5653
5654 devlink_health_reporter_put(reporter);
5655 return err;
5656 }
5657
5658 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5659 struct genl_info *info)
5660 {
5661 struct devlink *devlink = info->user_ptr[0];
5662 struct devlink_health_reporter *reporter;
5663 struct devlink_fmsg *fmsg;
5664 int err;
5665
5666 reporter = devlink_health_reporter_get_from_info(devlink, info);
5667 if (!reporter)
5668 return -EINVAL;
5669
5670 if (!reporter->ops->diagnose) {
5671 devlink_health_reporter_put(reporter);
5672 return -EOPNOTSUPP;
5673 }
5674
5675 fmsg = devlink_fmsg_alloc();
5676 if (!fmsg) {
5677 devlink_health_reporter_put(reporter);
5678 return -ENOMEM;
5679 }
5680
5681 err = devlink_fmsg_obj_nest_start(fmsg);
5682 if (err)
5683 goto out;
5684
5685 err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5686 if (err)
5687 goto out;
5688
5689 err = devlink_fmsg_obj_nest_end(fmsg);
5690 if (err)
5691 goto out;
5692
5693 err = devlink_fmsg_snd(fmsg, info,
5694 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5695
5696 out:
5697 devlink_fmsg_free(fmsg);
5698 devlink_health_reporter_put(reporter);
5699 return err;
5700 }
5701
5702 static int
5703 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5704 struct netlink_callback *cb)
5705 {
5706 struct devlink_health_reporter *reporter;
5707 u64 start = cb->args[0];
5708 int err;
5709
5710 reporter = devlink_health_reporter_get_from_cb(cb);
5711 if (!reporter)
5712 return -EINVAL;
5713
5714 if (!reporter->ops->dump) {
5715 err = -EOPNOTSUPP;
5716 goto out;
5717 }
5718 mutex_lock(&reporter->dump_lock);
5719 if (!start) {
5720 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5721 if (err)
5722 goto unlock;
5723 cb->args[1] = reporter->dump_ts;
5724 }
5725 if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5726 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5727 err = -EAGAIN;
5728 goto unlock;
5729 }
5730
5731 err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5732 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5733 unlock:
5734 mutex_unlock(&reporter->dump_lock);
5735 out:
5736 devlink_health_reporter_put(reporter);
5737 return err;
5738 }
5739
5740 static int
5741 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5742 struct genl_info *info)
5743 {
5744 struct devlink *devlink = info->user_ptr[0];
5745 struct devlink_health_reporter *reporter;
5746
5747 reporter = devlink_health_reporter_get_from_info(devlink, info);
5748 if (!reporter)
5749 return -EINVAL;
5750
5751 if (!reporter->ops->dump) {
5752 devlink_health_reporter_put(reporter);
5753 return -EOPNOTSUPP;
5754 }
5755
5756 mutex_lock(&reporter->dump_lock);
5757 devlink_health_dump_clear(reporter);
5758 mutex_unlock(&reporter->dump_lock);
5759 devlink_health_reporter_put(reporter);
5760 return 0;
5761 }
5762
5763 struct devlink_stats {
5764 u64 rx_bytes;
5765 u64 rx_packets;
5766 struct u64_stats_sync syncp;
5767 };
5768
5769 /**
5770 * struct devlink_trap_policer_item - Packet trap policer attributes.
5771 * @policer: Immutable packet trap policer attributes.
5772 * @rate: Rate in packets / sec.
5773 * @burst: Burst size in packets.
5774 * @list: trap_policer_list member.
5775 *
5776 * Describes packet trap policer attributes. Created by devlink during trap
5777 * policer registration.
5778 */
5779 struct devlink_trap_policer_item {
5780 const struct devlink_trap_policer *policer;
5781 u64 rate;
5782 u64 burst;
5783 struct list_head list;
5784 };
5785
5786 /**
5787 * struct devlink_trap_group_item - Packet trap group attributes.
5788 * @group: Immutable packet trap group attributes.
5789 * @policer_item: Associated policer item. Can be NULL.
5790 * @list: trap_group_list member.
5791 * @stats: Trap group statistics.
5792 *
5793 * Describes packet trap group attributes. Created by devlink during trap
5794 * group registration.
5795 */
5796 struct devlink_trap_group_item {
5797 const struct devlink_trap_group *group;
5798 struct devlink_trap_policer_item *policer_item;
5799 struct list_head list;
5800 struct devlink_stats __percpu *stats;
5801 };
5802
5803 /**
5804 * struct devlink_trap_item - Packet trap attributes.
5805 * @trap: Immutable packet trap attributes.
5806 * @group_item: Associated group item.
5807 * @list: trap_list member.
5808 * @action: Trap action.
5809 * @stats: Trap statistics.
5810 * @priv: Driver private information.
5811 *
5812 * Describes both mutable and immutable packet trap attributes. Created by
5813 * devlink during trap registration and used for all trap related operations.
5814 */
5815 struct devlink_trap_item {
5816 const struct devlink_trap *trap;
5817 struct devlink_trap_group_item *group_item;
5818 struct list_head list;
5819 enum devlink_trap_action action;
5820 struct devlink_stats __percpu *stats;
5821 void *priv;
5822 };
5823
5824 static struct devlink_trap_policer_item *
5825 devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
5826 {
5827 struct devlink_trap_policer_item *policer_item;
5828
5829 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
5830 if (policer_item->policer->id == id)
5831 return policer_item;
5832 }
5833
5834 return NULL;
5835 }
5836
5837 static struct devlink_trap_item *
5838 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5839 {
5840 struct devlink_trap_item *trap_item;
5841
5842 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5843 if (!strcmp(trap_item->trap->name, name))
5844 return trap_item;
5845 }
5846
5847 return NULL;
5848 }
5849
5850 static struct devlink_trap_item *
5851 devlink_trap_item_get_from_info(struct devlink *devlink,
5852 struct genl_info *info)
5853 {
5854 struct nlattr *attr;
5855
5856 if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5857 return NULL;
5858 attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5859
5860 return devlink_trap_item_lookup(devlink, nla_data(attr));
5861 }
5862
5863 static int
5864 devlink_trap_action_get_from_info(struct genl_info *info,
5865 enum devlink_trap_action *p_trap_action)
5866 {
5867 u8 val;
5868
5869 val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5870 switch (val) {
5871 case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5872 case DEVLINK_TRAP_ACTION_TRAP: /* fall-through */
5873 case DEVLINK_TRAP_ACTION_MIRROR:
5874 *p_trap_action = val;
5875 break;
5876 default:
5877 return -EINVAL;
5878 }
5879
5880 return 0;
5881 }
5882
5883 static int devlink_trap_metadata_put(struct sk_buff *msg,
5884 const struct devlink_trap *trap)
5885 {
5886 struct nlattr *attr;
5887
5888 attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5889 if (!attr)
5890 return -EMSGSIZE;
5891
5892 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5893 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5894 goto nla_put_failure;
5895 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
5896 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
5897 goto nla_put_failure;
5898
5899 nla_nest_end(msg, attr);
5900
5901 return 0;
5902
5903 nla_put_failure:
5904 nla_nest_cancel(msg, attr);
5905 return -EMSGSIZE;
5906 }
5907
5908 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5909 struct devlink_stats *stats)
5910 {
5911 int i;
5912
5913 memset(stats, 0, sizeof(*stats));
5914 for_each_possible_cpu(i) {
5915 struct devlink_stats *cpu_stats;
5916 u64 rx_packets, rx_bytes;
5917 unsigned int start;
5918
5919 cpu_stats = per_cpu_ptr(trap_stats, i);
5920 do {
5921 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5922 rx_packets = cpu_stats->rx_packets;
5923 rx_bytes = cpu_stats->rx_bytes;
5924 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5925
5926 stats->rx_packets += rx_packets;
5927 stats->rx_bytes += rx_bytes;
5928 }
5929 }
5930
5931 static int devlink_trap_stats_put(struct sk_buff *msg,
5932 struct devlink_stats __percpu *trap_stats)
5933 {
5934 struct devlink_stats stats;
5935 struct nlattr *attr;
5936
5937 devlink_trap_stats_read(trap_stats, &stats);
5938
5939 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5940 if (!attr)
5941 return -EMSGSIZE;
5942
5943 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5944 stats.rx_packets, DEVLINK_ATTR_PAD))
5945 goto nla_put_failure;
5946
5947 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5948 stats.rx_bytes, DEVLINK_ATTR_PAD))
5949 goto nla_put_failure;
5950
5951 nla_nest_end(msg, attr);
5952
5953 return 0;
5954
5955 nla_put_failure:
5956 nla_nest_cancel(msg, attr);
5957 return -EMSGSIZE;
5958 }
5959
5960 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5961 const struct devlink_trap_item *trap_item,
5962 enum devlink_command cmd, u32 portid, u32 seq,
5963 int flags)
5964 {
5965 struct devlink_trap_group_item *group_item = trap_item->group_item;
5966 void *hdr;
5967 int err;
5968
5969 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5970 if (!hdr)
5971 return -EMSGSIZE;
5972
5973 if (devlink_nl_put_handle(msg, devlink))
5974 goto nla_put_failure;
5975
5976 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5977 group_item->group->name))
5978 goto nla_put_failure;
5979
5980 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5981 goto nla_put_failure;
5982
5983 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5984 goto nla_put_failure;
5985
5986 if (trap_item->trap->generic &&
5987 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5988 goto nla_put_failure;
5989
5990 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5991 goto nla_put_failure;
5992
5993 err = devlink_trap_metadata_put(msg, trap_item->trap);
5994 if (err)
5995 goto nla_put_failure;
5996
5997 err = devlink_trap_stats_put(msg, trap_item->stats);
5998 if (err)
5999 goto nla_put_failure;
6000
6001 genlmsg_end(msg, hdr);
6002
6003 return 0;
6004
6005 nla_put_failure:
6006 genlmsg_cancel(msg, hdr);
6007 return -EMSGSIZE;
6008 }
6009
6010 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
6011 struct genl_info *info)
6012 {
6013 struct netlink_ext_ack *extack = info->extack;
6014 struct devlink *devlink = info->user_ptr[0];
6015 struct devlink_trap_item *trap_item;
6016 struct sk_buff *msg;
6017 int err;
6018
6019 if (list_empty(&devlink->trap_list))
6020 return -EOPNOTSUPP;
6021
6022 trap_item = devlink_trap_item_get_from_info(devlink, info);
6023 if (!trap_item) {
6024 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6025 return -ENOENT;
6026 }
6027
6028 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6029 if (!msg)
6030 return -ENOMEM;
6031
6032 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6033 DEVLINK_CMD_TRAP_NEW, info->snd_portid,
6034 info->snd_seq, 0);
6035 if (err)
6036 goto err_trap_fill;
6037
6038 return genlmsg_reply(msg, info);
6039
6040 err_trap_fill:
6041 nlmsg_free(msg);
6042 return err;
6043 }
6044
6045 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
6046 struct netlink_callback *cb)
6047 {
6048 struct devlink_trap_item *trap_item;
6049 struct devlink *devlink;
6050 int start = cb->args[0];
6051 int idx = 0;
6052 int err;
6053
6054 mutex_lock(&devlink_mutex);
6055 list_for_each_entry(devlink, &devlink_list, list) {
6056 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6057 continue;
6058 mutex_lock(&devlink->lock);
6059 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6060 if (idx < start) {
6061 idx++;
6062 continue;
6063 }
6064 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6065 DEVLINK_CMD_TRAP_NEW,
6066 NETLINK_CB(cb->skb).portid,
6067 cb->nlh->nlmsg_seq,
6068 NLM_F_MULTI);
6069 if (err) {
6070 mutex_unlock(&devlink->lock);
6071 goto out;
6072 }
6073 idx++;
6074 }
6075 mutex_unlock(&devlink->lock);
6076 }
6077 out:
6078 mutex_unlock(&devlink_mutex);
6079
6080 cb->args[0] = idx;
6081 return msg->len;
6082 }
6083
6084 static int __devlink_trap_action_set(struct devlink *devlink,
6085 struct devlink_trap_item *trap_item,
6086 enum devlink_trap_action trap_action,
6087 struct netlink_ext_ack *extack)
6088 {
6089 int err;
6090
6091 if (trap_item->action != trap_action &&
6092 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
6093 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
6094 return 0;
6095 }
6096
6097 err = devlink->ops->trap_action_set(devlink, trap_item->trap,
6098 trap_action);
6099 if (err)
6100 return err;
6101
6102 trap_item->action = trap_action;
6103
6104 return 0;
6105 }
6106
6107 static int devlink_trap_action_set(struct devlink *devlink,
6108 struct devlink_trap_item *trap_item,
6109 struct genl_info *info)
6110 {
6111 enum devlink_trap_action trap_action;
6112 int err;
6113
6114 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6115 return 0;
6116
6117 err = devlink_trap_action_get_from_info(info, &trap_action);
6118 if (err) {
6119 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6120 return -EINVAL;
6121 }
6122
6123 return __devlink_trap_action_set(devlink, trap_item, trap_action,
6124 info->extack);
6125 }
6126
6127 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
6128 struct genl_info *info)
6129 {
6130 struct netlink_ext_ack *extack = info->extack;
6131 struct devlink *devlink = info->user_ptr[0];
6132 struct devlink_trap_item *trap_item;
6133 int err;
6134
6135 if (list_empty(&devlink->trap_list))
6136 return -EOPNOTSUPP;
6137
6138 trap_item = devlink_trap_item_get_from_info(devlink, info);
6139 if (!trap_item) {
6140 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6141 return -ENOENT;
6142 }
6143
6144 err = devlink_trap_action_set(devlink, trap_item, info);
6145 if (err)
6146 return err;
6147
6148 return 0;
6149 }
6150
6151 static struct devlink_trap_group_item *
6152 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
6153 {
6154 struct devlink_trap_group_item *group_item;
6155
6156 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6157 if (!strcmp(group_item->group->name, name))
6158 return group_item;
6159 }
6160
6161 return NULL;
6162 }
6163
6164 static struct devlink_trap_group_item *
6165 devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
6166 {
6167 struct devlink_trap_group_item *group_item;
6168
6169 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6170 if (group_item->group->id == id)
6171 return group_item;
6172 }
6173
6174 return NULL;
6175 }
6176
6177 static struct devlink_trap_group_item *
6178 devlink_trap_group_item_get_from_info(struct devlink *devlink,
6179 struct genl_info *info)
6180 {
6181 char *name;
6182
6183 if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
6184 return NULL;
6185 name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
6186
6187 return devlink_trap_group_item_lookup(devlink, name);
6188 }
6189
6190 static int
6191 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
6192 const struct devlink_trap_group_item *group_item,
6193 enum devlink_command cmd, u32 portid, u32 seq,
6194 int flags)
6195 {
6196 void *hdr;
6197 int err;
6198
6199 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6200 if (!hdr)
6201 return -EMSGSIZE;
6202
6203 if (devlink_nl_put_handle(msg, devlink))
6204 goto nla_put_failure;
6205
6206 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
6207 group_item->group->name))
6208 goto nla_put_failure;
6209
6210 if (group_item->group->generic &&
6211 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
6212 goto nla_put_failure;
6213
6214 if (group_item->policer_item &&
6215 nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6216 group_item->policer_item->policer->id))
6217 goto nla_put_failure;
6218
6219 err = devlink_trap_stats_put(msg, group_item->stats);
6220 if (err)
6221 goto nla_put_failure;
6222
6223 genlmsg_end(msg, hdr);
6224
6225 return 0;
6226
6227 nla_put_failure:
6228 genlmsg_cancel(msg, hdr);
6229 return -EMSGSIZE;
6230 }
6231
6232 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
6233 struct genl_info *info)
6234 {
6235 struct netlink_ext_ack *extack = info->extack;
6236 struct devlink *devlink = info->user_ptr[0];
6237 struct devlink_trap_group_item *group_item;
6238 struct sk_buff *msg;
6239 int err;
6240
6241 if (list_empty(&devlink->trap_group_list))
6242 return -EOPNOTSUPP;
6243
6244 group_item = devlink_trap_group_item_get_from_info(devlink, info);
6245 if (!group_item) {
6246 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6247 return -ENOENT;
6248 }
6249
6250 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6251 if (!msg)
6252 return -ENOMEM;
6253
6254 err = devlink_nl_trap_group_fill(msg, devlink, group_item,
6255 DEVLINK_CMD_TRAP_GROUP_NEW,
6256 info->snd_portid, info->snd_seq, 0);
6257 if (err)
6258 goto err_trap_group_fill;
6259
6260 return genlmsg_reply(msg, info);
6261
6262 err_trap_group_fill:
6263 nlmsg_free(msg);
6264 return err;
6265 }
6266
6267 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
6268 struct netlink_callback *cb)
6269 {
6270 enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
6271 struct devlink_trap_group_item *group_item;
6272 u32 portid = NETLINK_CB(cb->skb).portid;
6273 struct devlink *devlink;
6274 int start = cb->args[0];
6275 int idx = 0;
6276 int err;
6277
6278 mutex_lock(&devlink_mutex);
6279 list_for_each_entry(devlink, &devlink_list, list) {
6280 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6281 continue;
6282 mutex_lock(&devlink->lock);
6283 list_for_each_entry(group_item, &devlink->trap_group_list,
6284 list) {
6285 if (idx < start) {
6286 idx++;
6287 continue;
6288 }
6289 err = devlink_nl_trap_group_fill(msg, devlink,
6290 group_item, cmd,
6291 portid,
6292 cb->nlh->nlmsg_seq,
6293 NLM_F_MULTI);
6294 if (err) {
6295 mutex_unlock(&devlink->lock);
6296 goto out;
6297 }
6298 idx++;
6299 }
6300 mutex_unlock(&devlink->lock);
6301 }
6302 out:
6303 mutex_unlock(&devlink_mutex);
6304
6305 cb->args[0] = idx;
6306 return msg->len;
6307 }
6308
6309 static int
6310 __devlink_trap_group_action_set(struct devlink *devlink,
6311 struct devlink_trap_group_item *group_item,
6312 enum devlink_trap_action trap_action,
6313 struct netlink_ext_ack *extack)
6314 {
6315 const char *group_name = group_item->group->name;
6316 struct devlink_trap_item *trap_item;
6317 int err;
6318
6319 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6320 if (strcmp(trap_item->group_item->group->name, group_name))
6321 continue;
6322 err = __devlink_trap_action_set(devlink, trap_item,
6323 trap_action, extack);
6324 if (err)
6325 return err;
6326 }
6327
6328 return 0;
6329 }
6330
6331 static int
6332 devlink_trap_group_action_set(struct devlink *devlink,
6333 struct devlink_trap_group_item *group_item,
6334 struct genl_info *info, bool *p_modified)
6335 {
6336 enum devlink_trap_action trap_action;
6337 int err;
6338
6339 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6340 return 0;
6341
6342 err = devlink_trap_action_get_from_info(info, &trap_action);
6343 if (err) {
6344 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6345 return -EINVAL;
6346 }
6347
6348 err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
6349 info->extack);
6350 if (err)
6351 return err;
6352
6353 *p_modified = true;
6354
6355 return 0;
6356 }
6357
6358 static int devlink_trap_group_set(struct devlink *devlink,
6359 struct devlink_trap_group_item *group_item,
6360 struct genl_info *info)
6361 {
6362 struct devlink_trap_policer_item *policer_item;
6363 struct netlink_ext_ack *extack = info->extack;
6364 const struct devlink_trap_policer *policer;
6365 struct nlattr **attrs = info->attrs;
6366 int err;
6367
6368 if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6369 return 0;
6370
6371 if (!devlink->ops->trap_group_set)
6372 return -EOPNOTSUPP;
6373
6374 policer_item = group_item->policer_item;
6375 if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) {
6376 u32 policer_id;
6377
6378 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6379 policer_item = devlink_trap_policer_item_lookup(devlink,
6380 policer_id);
6381 if (policer_id && !policer_item) {
6382 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6383 return -ENOENT;
6384 }
6385 }
6386 policer = policer_item ? policer_item->policer : NULL;
6387
6388 err = devlink->ops->trap_group_set(devlink, group_item->group, policer);
6389 if (err)
6390 return err;
6391
6392 group_item->policer_item = policer_item;
6393
6394 return 0;
6395 }
6396
6397 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
6398 struct genl_info *info)
6399 {
6400 struct netlink_ext_ack *extack = info->extack;
6401 struct devlink *devlink = info->user_ptr[0];
6402 struct devlink_trap_group_item *group_item;
6403 bool modified = false;
6404 int err;
6405
6406 if (list_empty(&devlink->trap_group_list))
6407 return -EOPNOTSUPP;
6408
6409 group_item = devlink_trap_group_item_get_from_info(devlink, info);
6410 if (!group_item) {
6411 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6412 return -ENOENT;
6413 }
6414
6415 err = devlink_trap_group_action_set(devlink, group_item, info,
6416 &modified);
6417 if (err)
6418 return err;
6419
6420 err = devlink_trap_group_set(devlink, group_item, info);
6421 if (err)
6422 goto err_trap_group_set;
6423
6424 return 0;
6425
6426 err_trap_group_set:
6427 if (modified)
6428 NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
6429 return err;
6430 }
6431
6432 static struct devlink_trap_policer_item *
6433 devlink_trap_policer_item_get_from_info(struct devlink *devlink,
6434 struct genl_info *info)
6435 {
6436 u32 id;
6437
6438 if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6439 return NULL;
6440 id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6441
6442 return devlink_trap_policer_item_lookup(devlink, id);
6443 }
6444
6445 static int
6446 devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
6447 const struct devlink_trap_policer *policer)
6448 {
6449 struct nlattr *attr;
6450 u64 drops;
6451 int err;
6452
6453 if (!devlink->ops->trap_policer_counter_get)
6454 return 0;
6455
6456 err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
6457 if (err)
6458 return err;
6459
6460 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
6461 if (!attr)
6462 return -EMSGSIZE;
6463
6464 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
6465 DEVLINK_ATTR_PAD))
6466 goto nla_put_failure;
6467
6468 nla_nest_end(msg, attr);
6469
6470 return 0;
6471
6472 nla_put_failure:
6473 nla_nest_cancel(msg, attr);
6474 return -EMSGSIZE;
6475 }
6476
6477 static int
6478 devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
6479 const struct devlink_trap_policer_item *policer_item,
6480 enum devlink_command cmd, u32 portid, u32 seq,
6481 int flags)
6482 {
6483 void *hdr;
6484 int err;
6485
6486 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6487 if (!hdr)
6488 return -EMSGSIZE;
6489
6490 if (devlink_nl_put_handle(msg, devlink))
6491 goto nla_put_failure;
6492
6493 if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6494 policer_item->policer->id))
6495 goto nla_put_failure;
6496
6497 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
6498 policer_item->rate, DEVLINK_ATTR_PAD))
6499 goto nla_put_failure;
6500
6501 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
6502 policer_item->burst, DEVLINK_ATTR_PAD))
6503 goto nla_put_failure;
6504
6505 err = devlink_trap_policer_stats_put(msg, devlink,
6506 policer_item->policer);
6507 if (err)
6508 goto nla_put_failure;
6509
6510 genlmsg_end(msg, hdr);
6511
6512 return 0;
6513
6514 nla_put_failure:
6515 genlmsg_cancel(msg, hdr);
6516 return -EMSGSIZE;
6517 }
6518
6519 static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
6520 struct genl_info *info)
6521 {
6522 struct devlink_trap_policer_item *policer_item;
6523 struct netlink_ext_ack *extack = info->extack;
6524 struct devlink *devlink = info->user_ptr[0];
6525 struct sk_buff *msg;
6526 int err;
6527
6528 if (list_empty(&devlink->trap_policer_list))
6529 return -EOPNOTSUPP;
6530
6531 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6532 if (!policer_item) {
6533 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6534 return -ENOENT;
6535 }
6536
6537 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6538 if (!msg)
6539 return -ENOMEM;
6540
6541 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
6542 DEVLINK_CMD_TRAP_POLICER_NEW,
6543 info->snd_portid, info->snd_seq, 0);
6544 if (err)
6545 goto err_trap_policer_fill;
6546
6547 return genlmsg_reply(msg, info);
6548
6549 err_trap_policer_fill:
6550 nlmsg_free(msg);
6551 return err;
6552 }
6553
6554 static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
6555 struct netlink_callback *cb)
6556 {
6557 enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
6558 struct devlink_trap_policer_item *policer_item;
6559 u32 portid = NETLINK_CB(cb->skb).portid;
6560 struct devlink *devlink;
6561 int start = cb->args[0];
6562 int idx = 0;
6563 int err;
6564
6565 mutex_lock(&devlink_mutex);
6566 list_for_each_entry(devlink, &devlink_list, list) {
6567 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6568 continue;
6569 mutex_lock(&devlink->lock);
6570 list_for_each_entry(policer_item, &devlink->trap_policer_list,
6571 list) {
6572 if (idx < start) {
6573 idx++;
6574 continue;
6575 }
6576 err = devlink_nl_trap_policer_fill(msg, devlink,
6577 policer_item, cmd,
6578 portid,
6579 cb->nlh->nlmsg_seq,
6580 NLM_F_MULTI);
6581 if (err) {
6582 mutex_unlock(&devlink->lock);
6583 goto out;
6584 }
6585 idx++;
6586 }
6587 mutex_unlock(&devlink->lock);
6588 }
6589 out:
6590 mutex_unlock(&devlink_mutex);
6591
6592 cb->args[0] = idx;
6593 return msg->len;
6594 }
6595
6596 static int
6597 devlink_trap_policer_set(struct devlink *devlink,
6598 struct devlink_trap_policer_item *policer_item,
6599 struct genl_info *info)
6600 {
6601 struct netlink_ext_ack *extack = info->extack;
6602 struct nlattr **attrs = info->attrs;
6603 u64 rate, burst;
6604 int err;
6605
6606 rate = policer_item->rate;
6607 burst = policer_item->burst;
6608
6609 if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
6610 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
6611
6612 if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
6613 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
6614
6615 if (rate < policer_item->policer->min_rate) {
6616 NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
6617 return -EINVAL;
6618 }
6619
6620 if (rate > policer_item->policer->max_rate) {
6621 NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
6622 return -EINVAL;
6623 }
6624
6625 if (burst < policer_item->policer->min_burst) {
6626 NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
6627 return -EINVAL;
6628 }
6629
6630 if (burst > policer_item->policer->max_burst) {
6631 NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
6632 return -EINVAL;
6633 }
6634
6635 err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
6636 rate, burst, info->extack);
6637 if (err)
6638 return err;
6639
6640 policer_item->rate = rate;
6641 policer_item->burst = burst;
6642
6643 return 0;
6644 }
6645
6646 static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
6647 struct genl_info *info)
6648 {
6649 struct devlink_trap_policer_item *policer_item;
6650 struct netlink_ext_ack *extack = info->extack;
6651 struct devlink *devlink = info->user_ptr[0];
6652
6653 if (list_empty(&devlink->trap_policer_list))
6654 return -EOPNOTSUPP;
6655
6656 if (!devlink->ops->trap_policer_set)
6657 return -EOPNOTSUPP;
6658
6659 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6660 if (!policer_item) {
6661 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6662 return -ENOENT;
6663 }
6664
6665 return devlink_trap_policer_set(devlink, policer_item, info);
6666 }
6667
6668 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
6669 [DEVLINK_ATTR_UNSPEC] = { .strict_start_type =
6670 DEVLINK_ATTR_TRAP_POLICER_ID },
6671 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
6672 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
6673 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
6674 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
6675 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
6676 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
6677 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
6678 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
6679 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
6680 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
6681 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
6682 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
6683 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
6684 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
6685 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
6686 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
6687 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
6688 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
6689 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
6690 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
6691 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
6692 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
6693 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
6694 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
6695 [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
6696 [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
6697 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
6698 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
6699 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
6700 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
6701 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
6702 [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
6703 [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
6704 [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
6705 [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
6706 [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
6707 [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
6708 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },
6709 [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
6710 [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
6711 [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
6712 };
6713
6714 static const struct genl_ops devlink_nl_ops[] = {
6715 {
6716 .cmd = DEVLINK_CMD_GET,
6717 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6718 .doit = devlink_nl_cmd_get_doit,
6719 .dumpit = devlink_nl_cmd_get_dumpit,
6720 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6721 /* can be retrieved by unprivileged users */
6722 },
6723 {
6724 .cmd = DEVLINK_CMD_PORT_GET,
6725 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6726 .doit = devlink_nl_cmd_port_get_doit,
6727 .dumpit = devlink_nl_cmd_port_get_dumpit,
6728 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6729 /* can be retrieved by unprivileged users */
6730 },
6731 {
6732 .cmd = DEVLINK_CMD_PORT_SET,
6733 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6734 .doit = devlink_nl_cmd_port_set_doit,
6735 .flags = GENL_ADMIN_PERM,
6736 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6737 },
6738 {
6739 .cmd = DEVLINK_CMD_PORT_SPLIT,
6740 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6741 .doit = devlink_nl_cmd_port_split_doit,
6742 .flags = GENL_ADMIN_PERM,
6743 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6744 DEVLINK_NL_FLAG_NO_LOCK,
6745 },
6746 {
6747 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
6748 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6749 .doit = devlink_nl_cmd_port_unsplit_doit,
6750 .flags = GENL_ADMIN_PERM,
6751 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6752 DEVLINK_NL_FLAG_NO_LOCK,
6753 },
6754 {
6755 .cmd = DEVLINK_CMD_SB_GET,
6756 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6757 .doit = devlink_nl_cmd_sb_get_doit,
6758 .dumpit = devlink_nl_cmd_sb_get_dumpit,
6759 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6760 DEVLINK_NL_FLAG_NEED_SB,
6761 /* can be retrieved by unprivileged users */
6762 },
6763 {
6764 .cmd = DEVLINK_CMD_SB_POOL_GET,
6765 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6766 .doit = devlink_nl_cmd_sb_pool_get_doit,
6767 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
6768 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6769 DEVLINK_NL_FLAG_NEED_SB,
6770 /* can be retrieved by unprivileged users */
6771 },
6772 {
6773 .cmd = DEVLINK_CMD_SB_POOL_SET,
6774 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6775 .doit = devlink_nl_cmd_sb_pool_set_doit,
6776 .flags = GENL_ADMIN_PERM,
6777 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6778 DEVLINK_NL_FLAG_NEED_SB,
6779 },
6780 {
6781 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
6782 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6783 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
6784 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
6785 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6786 DEVLINK_NL_FLAG_NEED_SB,
6787 /* can be retrieved by unprivileged users */
6788 },
6789 {
6790 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
6791 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6792 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
6793 .flags = GENL_ADMIN_PERM,
6794 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6795 DEVLINK_NL_FLAG_NEED_SB,
6796 },
6797 {
6798 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6799 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6800 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6801 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6802 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6803 DEVLINK_NL_FLAG_NEED_SB,
6804 /* can be retrieved by unprivileged users */
6805 },
6806 {
6807 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6808 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6809 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6810 .flags = GENL_ADMIN_PERM,
6811 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6812 DEVLINK_NL_FLAG_NEED_SB,
6813 },
6814 {
6815 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6816 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6817 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6818 .flags = GENL_ADMIN_PERM,
6819 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6820 DEVLINK_NL_FLAG_NEED_SB,
6821 },
6822 {
6823 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6824 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6825 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6826 .flags = GENL_ADMIN_PERM,
6827 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6828 DEVLINK_NL_FLAG_NEED_SB,
6829 },
6830 {
6831 .cmd = DEVLINK_CMD_ESWITCH_GET,
6832 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6833 .doit = devlink_nl_cmd_eswitch_get_doit,
6834 .flags = GENL_ADMIN_PERM,
6835 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6836 DEVLINK_NL_FLAG_NO_LOCK,
6837 },
6838 {
6839 .cmd = DEVLINK_CMD_ESWITCH_SET,
6840 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6841 .doit = devlink_nl_cmd_eswitch_set_doit,
6842 .flags = GENL_ADMIN_PERM,
6843 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6844 DEVLINK_NL_FLAG_NO_LOCK,
6845 },
6846 {
6847 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6848 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6849 .doit = devlink_nl_cmd_dpipe_table_get,
6850 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6851 /* can be retrieved by unprivileged users */
6852 },
6853 {
6854 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6855 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6856 .doit = devlink_nl_cmd_dpipe_entries_get,
6857 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6858 /* can be retrieved by unprivileged users */
6859 },
6860 {
6861 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6862 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6863 .doit = devlink_nl_cmd_dpipe_headers_get,
6864 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6865 /* can be retrieved by unprivileged users */
6866 },
6867 {
6868 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6869 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6870 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6871 .flags = GENL_ADMIN_PERM,
6872 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6873 },
6874 {
6875 .cmd = DEVLINK_CMD_RESOURCE_SET,
6876 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6877 .doit = devlink_nl_cmd_resource_set,
6878 .flags = GENL_ADMIN_PERM,
6879 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6880 },
6881 {
6882 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6883 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6884 .doit = devlink_nl_cmd_resource_dump,
6885 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6886 /* can be retrieved by unprivileged users */
6887 },
6888 {
6889 .cmd = DEVLINK_CMD_RELOAD,
6890 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6891 .doit = devlink_nl_cmd_reload,
6892 .flags = GENL_ADMIN_PERM,
6893 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6894 DEVLINK_NL_FLAG_NO_LOCK,
6895 },
6896 {
6897 .cmd = DEVLINK_CMD_PARAM_GET,
6898 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6899 .doit = devlink_nl_cmd_param_get_doit,
6900 .dumpit = devlink_nl_cmd_param_get_dumpit,
6901 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6902 /* can be retrieved by unprivileged users */
6903 },
6904 {
6905 .cmd = DEVLINK_CMD_PARAM_SET,
6906 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6907 .doit = devlink_nl_cmd_param_set_doit,
6908 .flags = GENL_ADMIN_PERM,
6909 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6910 },
6911 {
6912 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6913 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6914 .doit = devlink_nl_cmd_port_param_get_doit,
6915 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6916 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6917 /* can be retrieved by unprivileged users */
6918 },
6919 {
6920 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6921 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6922 .doit = devlink_nl_cmd_port_param_set_doit,
6923 .flags = GENL_ADMIN_PERM,
6924 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6925 },
6926 {
6927 .cmd = DEVLINK_CMD_REGION_GET,
6928 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6929 .doit = devlink_nl_cmd_region_get_doit,
6930 .dumpit = devlink_nl_cmd_region_get_dumpit,
6931 .flags = GENL_ADMIN_PERM,
6932 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6933 },
6934 {
6935 .cmd = DEVLINK_CMD_REGION_NEW,
6936 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6937 .doit = devlink_nl_cmd_region_new,
6938 .flags = GENL_ADMIN_PERM,
6939 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6940 },
6941 {
6942 .cmd = DEVLINK_CMD_REGION_DEL,
6943 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6944 .doit = devlink_nl_cmd_region_del,
6945 .flags = GENL_ADMIN_PERM,
6946 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6947 },
6948 {
6949 .cmd = DEVLINK_CMD_REGION_READ,
6950 .validate = GENL_DONT_VALIDATE_STRICT |
6951 GENL_DONT_VALIDATE_DUMP_STRICT,
6952 .dumpit = devlink_nl_cmd_region_read_dumpit,
6953 .flags = GENL_ADMIN_PERM,
6954 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6955 },
6956 {
6957 .cmd = DEVLINK_CMD_INFO_GET,
6958 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6959 .doit = devlink_nl_cmd_info_get_doit,
6960 .dumpit = devlink_nl_cmd_info_get_dumpit,
6961 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6962 /* can be retrieved by unprivileged users */
6963 },
6964 {
6965 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6966 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6967 .doit = devlink_nl_cmd_health_reporter_get_doit,
6968 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6969 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6970 DEVLINK_NL_FLAG_NO_LOCK,
6971 /* can be retrieved by unprivileged users */
6972 },
6973 {
6974 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6975 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6976 .doit = devlink_nl_cmd_health_reporter_set_doit,
6977 .flags = GENL_ADMIN_PERM,
6978 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6979 DEVLINK_NL_FLAG_NO_LOCK,
6980 },
6981 {
6982 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6983 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6984 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6985 .flags = GENL_ADMIN_PERM,
6986 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6987 DEVLINK_NL_FLAG_NO_LOCK,
6988 },
6989 {
6990 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6991 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6992 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6993 .flags = GENL_ADMIN_PERM,
6994 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6995 DEVLINK_NL_FLAG_NO_LOCK,
6996 },
6997 {
6998 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6999 .validate = GENL_DONT_VALIDATE_STRICT |
7000 GENL_DONT_VALIDATE_DUMP_STRICT,
7001 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
7002 .flags = GENL_ADMIN_PERM,
7003 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
7004 DEVLINK_NL_FLAG_NO_LOCK,
7005 },
7006 {
7007 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
7008 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7009 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
7010 .flags = GENL_ADMIN_PERM,
7011 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
7012 DEVLINK_NL_FLAG_NO_LOCK,
7013 },
7014 {
7015 .cmd = DEVLINK_CMD_FLASH_UPDATE,
7016 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7017 .doit = devlink_nl_cmd_flash_update,
7018 .flags = GENL_ADMIN_PERM,
7019 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7020 },
7021 {
7022 .cmd = DEVLINK_CMD_TRAP_GET,
7023 .doit = devlink_nl_cmd_trap_get_doit,
7024 .dumpit = devlink_nl_cmd_trap_get_dumpit,
7025 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7026 /* can be retrieved by unprivileged users */
7027 },
7028 {
7029 .cmd = DEVLINK_CMD_TRAP_SET,
7030 .doit = devlink_nl_cmd_trap_set_doit,
7031 .flags = GENL_ADMIN_PERM,
7032 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7033 },
7034 {
7035 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
7036 .doit = devlink_nl_cmd_trap_group_get_doit,
7037 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
7038 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7039 /* can be retrieved by unprivileged users */
7040 },
7041 {
7042 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
7043 .doit = devlink_nl_cmd_trap_group_set_doit,
7044 .flags = GENL_ADMIN_PERM,
7045 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7046 },
7047 {
7048 .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
7049 .doit = devlink_nl_cmd_trap_policer_get_doit,
7050 .dumpit = devlink_nl_cmd_trap_policer_get_dumpit,
7051 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7052 /* can be retrieved by unprivileged users */
7053 },
7054 {
7055 .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
7056 .doit = devlink_nl_cmd_trap_policer_set_doit,
7057 .flags = GENL_ADMIN_PERM,
7058 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7059 },
7060 };
7061
7062 static struct genl_family devlink_nl_family __ro_after_init = {
7063 .name = DEVLINK_GENL_NAME,
7064 .version = DEVLINK_GENL_VERSION,
7065 .maxattr = DEVLINK_ATTR_MAX,
7066 .policy = devlink_nl_policy,
7067 .netnsok = true,
7068 .pre_doit = devlink_nl_pre_doit,
7069 .post_doit = devlink_nl_post_doit,
7070 .module = THIS_MODULE,
7071 .ops = devlink_nl_ops,
7072 .n_ops = ARRAY_SIZE(devlink_nl_ops),
7073 .mcgrps = devlink_nl_mcgrps,
7074 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
7075 };
7076
7077 /**
7078 * devlink_alloc - Allocate new devlink instance resources
7079 *
7080 * @ops: ops
7081 * @priv_size: size of user private data
7082 *
7083 * Allocate new devlink instance resources, including devlink index
7084 * and name.
7085 */
7086 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
7087 {
7088 struct devlink *devlink;
7089
7090 if (WARN_ON(!ops))
7091 return NULL;
7092
7093 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
7094 if (!devlink)
7095 return NULL;
7096 devlink->ops = ops;
7097 xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
7098 __devlink_net_set(devlink, &init_net);
7099 INIT_LIST_HEAD(&devlink->port_list);
7100 INIT_LIST_HEAD(&devlink->sb_list);
7101 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
7102 INIT_LIST_HEAD(&devlink->resource_list);
7103 INIT_LIST_HEAD(&devlink->param_list);
7104 INIT_LIST_HEAD(&devlink->region_list);
7105 INIT_LIST_HEAD(&devlink->reporter_list);
7106 INIT_LIST_HEAD(&devlink->trap_list);
7107 INIT_LIST_HEAD(&devlink->trap_group_list);
7108 INIT_LIST_HEAD(&devlink->trap_policer_list);
7109 mutex_init(&devlink->lock);
7110 mutex_init(&devlink->reporters_lock);
7111 return devlink;
7112 }
7113 EXPORT_SYMBOL_GPL(devlink_alloc);
7114
7115 /**
7116 * devlink_register - Register devlink instance
7117 *
7118 * @devlink: devlink
7119 * @dev: parent device
7120 */
7121 int devlink_register(struct devlink *devlink, struct device *dev)
7122 {
7123 mutex_lock(&devlink_mutex);
7124 devlink->dev = dev;
7125 devlink->registered = true;
7126 list_add_tail(&devlink->list, &devlink_list);
7127 devlink_notify(devlink, DEVLINK_CMD_NEW);
7128 mutex_unlock(&devlink_mutex);
7129 return 0;
7130 }
7131 EXPORT_SYMBOL_GPL(devlink_register);
7132
7133 /**
7134 * devlink_unregister - Unregister devlink instance
7135 *
7136 * @devlink: devlink
7137 */
7138 void devlink_unregister(struct devlink *devlink)
7139 {
7140 mutex_lock(&devlink_mutex);
7141 WARN_ON(devlink_reload_supported(devlink) &&
7142 devlink->reload_enabled);
7143 devlink_notify(devlink, DEVLINK_CMD_DEL);
7144 list_del(&devlink->list);
7145 mutex_unlock(&devlink_mutex);
7146 }
7147 EXPORT_SYMBOL_GPL(devlink_unregister);
7148
7149 /**
7150 * devlink_reload_enable - Enable reload of devlink instance
7151 *
7152 * @devlink: devlink
7153 *
7154 * Should be called at end of device initialization
7155 * process when reload operation is supported.
7156 */
7157 void devlink_reload_enable(struct devlink *devlink)
7158 {
7159 mutex_lock(&devlink_mutex);
7160 devlink->reload_enabled = true;
7161 mutex_unlock(&devlink_mutex);
7162 }
7163 EXPORT_SYMBOL_GPL(devlink_reload_enable);
7164
7165 /**
7166 * devlink_reload_disable - Disable reload of devlink instance
7167 *
7168 * @devlink: devlink
7169 *
7170 * Should be called at the beginning of device cleanup
7171 * process when reload operation is supported.
7172 */
7173 void devlink_reload_disable(struct devlink *devlink)
7174 {
7175 mutex_lock(&devlink_mutex);
7176 /* Mutex is taken which ensures that no reload operation is in
7177 * progress while setting up forbidded flag.
7178 */
7179 devlink->reload_enabled = false;
7180 mutex_unlock(&devlink_mutex);
7181 }
7182 EXPORT_SYMBOL_GPL(devlink_reload_disable);
7183
7184 /**
7185 * devlink_free - Free devlink instance resources
7186 *
7187 * @devlink: devlink
7188 */
7189 void devlink_free(struct devlink *devlink)
7190 {
7191 mutex_destroy(&devlink->reporters_lock);
7192 mutex_destroy(&devlink->lock);
7193 WARN_ON(!list_empty(&devlink->trap_policer_list));
7194 WARN_ON(!list_empty(&devlink->trap_group_list));
7195 WARN_ON(!list_empty(&devlink->trap_list));
7196 WARN_ON(!list_empty(&devlink->reporter_list));
7197 WARN_ON(!list_empty(&devlink->region_list));
7198 WARN_ON(!list_empty(&devlink->param_list));
7199 WARN_ON(!list_empty(&devlink->resource_list));
7200 WARN_ON(!list_empty(&devlink->dpipe_table_list));
7201 WARN_ON(!list_empty(&devlink->sb_list));
7202 WARN_ON(!list_empty(&devlink->port_list));
7203
7204 xa_destroy(&devlink->snapshot_ids);
7205
7206 kfree(devlink);
7207 }
7208 EXPORT_SYMBOL_GPL(devlink_free);
7209
7210 static void devlink_port_type_warn(struct work_struct *work)
7211 {
7212 WARN(true, "Type was not set for devlink port.");
7213 }
7214
7215 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
7216 {
7217 /* Ignore CPU and DSA flavours. */
7218 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
7219 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
7220 }
7221
7222 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
7223
7224 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
7225 {
7226 if (!devlink_port_type_should_warn(devlink_port))
7227 return;
7228 /* Schedule a work to WARN in case driver does not set port
7229 * type within timeout.
7230 */
7231 schedule_delayed_work(&devlink_port->type_warn_dw,
7232 DEVLINK_PORT_TYPE_WARN_TIMEOUT);
7233 }
7234
7235 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
7236 {
7237 if (!devlink_port_type_should_warn(devlink_port))
7238 return;
7239 cancel_delayed_work_sync(&devlink_port->type_warn_dw);
7240 }
7241
7242 /**
7243 * devlink_port_register - Register devlink port
7244 *
7245 * @devlink: devlink
7246 * @devlink_port: devlink port
7247 * @port_index: driver-specific numerical identifier of the port
7248 *
7249 * Register devlink port with provided port index. User can use
7250 * any indexing, even hw-related one. devlink_port structure
7251 * is convenient to be embedded inside user driver private structure.
7252 * Note that the caller should take care of zeroing the devlink_port
7253 * structure.
7254 */
7255 int devlink_port_register(struct devlink *devlink,
7256 struct devlink_port *devlink_port,
7257 unsigned int port_index)
7258 {
7259 mutex_lock(&devlink->lock);
7260 if (devlink_port_index_exists(devlink, port_index)) {
7261 mutex_unlock(&devlink->lock);
7262 return -EEXIST;
7263 }
7264 devlink_port->devlink = devlink;
7265 devlink_port->index = port_index;
7266 devlink_port->registered = true;
7267 spin_lock_init(&devlink_port->type_lock);
7268 list_add_tail(&devlink_port->list, &devlink->port_list);
7269 INIT_LIST_HEAD(&devlink_port->param_list);
7270 mutex_unlock(&devlink->lock);
7271 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
7272 devlink_port_type_warn_schedule(devlink_port);
7273 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7274 return 0;
7275 }
7276 EXPORT_SYMBOL_GPL(devlink_port_register);
7277
7278 /**
7279 * devlink_port_unregister - Unregister devlink port
7280 *
7281 * @devlink_port: devlink port
7282 */
7283 void devlink_port_unregister(struct devlink_port *devlink_port)
7284 {
7285 struct devlink *devlink = devlink_port->devlink;
7286
7287 devlink_port_type_warn_cancel(devlink_port);
7288 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
7289 mutex_lock(&devlink->lock);
7290 list_del(&devlink_port->list);
7291 mutex_unlock(&devlink->lock);
7292 }
7293 EXPORT_SYMBOL_GPL(devlink_port_unregister);
7294
7295 static void __devlink_port_type_set(struct devlink_port *devlink_port,
7296 enum devlink_port_type type,
7297 void *type_dev)
7298 {
7299 if (WARN_ON(!devlink_port->registered))
7300 return;
7301 devlink_port_type_warn_cancel(devlink_port);
7302 spin_lock_bh(&devlink_port->type_lock);
7303 devlink_port->type = type;
7304 devlink_port->type_dev = type_dev;
7305 spin_unlock_bh(&devlink_port->type_lock);
7306 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7307 }
7308
7309 /**
7310 * devlink_port_type_eth_set - Set port type to Ethernet
7311 *
7312 * @devlink_port: devlink port
7313 * @netdev: related netdevice
7314 */
7315 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
7316 struct net_device *netdev)
7317 {
7318 const struct net_device_ops *ops = netdev->netdev_ops;
7319
7320 /* If driver registers devlink port, it should set devlink port
7321 * attributes accordingly so the compat functions are called
7322 * and the original ops are not used.
7323 */
7324 if (ops->ndo_get_phys_port_name) {
7325 /* Some drivers use the same set of ndos for netdevs
7326 * that have devlink_port registered and also for
7327 * those who don't. Make sure that ndo_get_phys_port_name
7328 * returns -EOPNOTSUPP here in case it is defined.
7329 * Warn if not.
7330 */
7331 char name[IFNAMSIZ];
7332 int err;
7333
7334 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
7335 WARN_ON(err != -EOPNOTSUPP);
7336 }
7337 if (ops->ndo_get_port_parent_id) {
7338 /* Some drivers use the same set of ndos for netdevs
7339 * that have devlink_port registered and also for
7340 * those who don't. Make sure that ndo_get_port_parent_id
7341 * returns -EOPNOTSUPP here in case it is defined.
7342 * Warn if not.
7343 */
7344 struct netdev_phys_item_id ppid;
7345 int err;
7346
7347 err = ops->ndo_get_port_parent_id(netdev, &ppid);
7348 WARN_ON(err != -EOPNOTSUPP);
7349 }
7350 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
7351 }
7352 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
7353
7354 /**
7355 * devlink_port_type_ib_set - Set port type to InfiniBand
7356 *
7357 * @devlink_port: devlink port
7358 * @ibdev: related IB device
7359 */
7360 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
7361 struct ib_device *ibdev)
7362 {
7363 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
7364 }
7365 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
7366
7367 /**
7368 * devlink_port_type_clear - Clear port type
7369 *
7370 * @devlink_port: devlink port
7371 */
7372 void devlink_port_type_clear(struct devlink_port *devlink_port)
7373 {
7374 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
7375 devlink_port_type_warn_schedule(devlink_port);
7376 }
7377 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
7378
7379 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
7380 enum devlink_port_flavour flavour,
7381 const unsigned char *switch_id,
7382 unsigned char switch_id_len)
7383 {
7384 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7385
7386 if (WARN_ON(devlink_port->registered))
7387 return -EEXIST;
7388 attrs->set = true;
7389 attrs->flavour = flavour;
7390 if (switch_id) {
7391 attrs->switch_port = true;
7392 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
7393 switch_id_len = MAX_PHYS_ITEM_ID_LEN;
7394 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
7395 attrs->switch_id.id_len = switch_id_len;
7396 } else {
7397 attrs->switch_port = false;
7398 }
7399 return 0;
7400 }
7401
7402 /**
7403 * devlink_port_attrs_set - Set port attributes
7404 *
7405 * @devlink_port: devlink port
7406 * @flavour: flavour of the port
7407 * @port_number: number of the port that is facing user, for example
7408 * the front panel port number
7409 * @split: indicates if this is split port
7410 * @split_subport_number: if the port is split, this is the number
7411 * of subport.
7412 * @switch_id: if the port is part of switch, this is buffer with ID,
7413 * otwerwise this is NULL
7414 * @switch_id_len: length of the switch_id buffer
7415 */
7416 void devlink_port_attrs_set(struct devlink_port *devlink_port,
7417 enum devlink_port_flavour flavour,
7418 u32 port_number, bool split,
7419 u32 split_subport_number,
7420 const unsigned char *switch_id,
7421 unsigned char switch_id_len)
7422 {
7423 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7424 int ret;
7425
7426 ret = __devlink_port_attrs_set(devlink_port, flavour,
7427 switch_id, switch_id_len);
7428 if (ret)
7429 return;
7430 attrs->split = split;
7431 attrs->phys.port_number = port_number;
7432 attrs->phys.split_subport_number = split_subport_number;
7433 }
7434 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
7435
7436 /**
7437 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
7438 *
7439 * @devlink_port: devlink port
7440 * @pf: associated PF for the devlink port instance
7441 * @switch_id: if the port is part of switch, this is buffer with ID,
7442 * otherwise this is NULL
7443 * @switch_id_len: length of the switch_id buffer
7444 */
7445 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
7446 const unsigned char *switch_id,
7447 unsigned char switch_id_len, u16 pf)
7448 {
7449 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7450 int ret;
7451
7452 ret = __devlink_port_attrs_set(devlink_port,
7453 DEVLINK_PORT_FLAVOUR_PCI_PF,
7454 switch_id, switch_id_len);
7455 if (ret)
7456 return;
7457
7458 attrs->pci_pf.pf = pf;
7459 }
7460 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
7461
7462 /**
7463 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
7464 *
7465 * @devlink_port: devlink port
7466 * @pf: associated PF for the devlink port instance
7467 * @vf: associated VF of a PF for the devlink port instance
7468 * @switch_id: if the port is part of switch, this is buffer with ID,
7469 * otherwise this is NULL
7470 * @switch_id_len: length of the switch_id buffer
7471 */
7472 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
7473 const unsigned char *switch_id,
7474 unsigned char switch_id_len,
7475 u16 pf, u16 vf)
7476 {
7477 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7478 int ret;
7479
7480 ret = __devlink_port_attrs_set(devlink_port,
7481 DEVLINK_PORT_FLAVOUR_PCI_VF,
7482 switch_id, switch_id_len);
7483 if (ret)
7484 return;
7485 attrs->pci_vf.pf = pf;
7486 attrs->pci_vf.vf = vf;
7487 }
7488 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
7489
7490 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
7491 char *name, size_t len)
7492 {
7493 struct devlink_port_attrs *attrs = &devlink_port->attrs;
7494 int n = 0;
7495
7496 if (!attrs->set)
7497 return -EOPNOTSUPP;
7498
7499 switch (attrs->flavour) {
7500 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
7501 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
7502 if (!attrs->split)
7503 n = snprintf(name, len, "p%u", attrs->phys.port_number);
7504 else
7505 n = snprintf(name, len, "p%us%u",
7506 attrs->phys.port_number,
7507 attrs->phys.split_subport_number);
7508 break;
7509 case DEVLINK_PORT_FLAVOUR_CPU:
7510 case DEVLINK_PORT_FLAVOUR_DSA:
7511 /* As CPU and DSA ports do not have a netdevice associated
7512 * case should not ever happen.
7513 */
7514 WARN_ON(1);
7515 return -EINVAL;
7516 case DEVLINK_PORT_FLAVOUR_PCI_PF:
7517 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
7518 break;
7519 case DEVLINK_PORT_FLAVOUR_PCI_VF:
7520 n = snprintf(name, len, "pf%uvf%u",
7521 attrs->pci_vf.pf, attrs->pci_vf.vf);
7522 break;
7523 }
7524
7525 if (n >= len)
7526 return -EINVAL;
7527
7528 return 0;
7529 }
7530
7531 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
7532 u32 size, u16 ingress_pools_count,
7533 u16 egress_pools_count, u16 ingress_tc_count,
7534 u16 egress_tc_count)
7535 {
7536 struct devlink_sb *devlink_sb;
7537 int err = 0;
7538
7539 mutex_lock(&devlink->lock);
7540 if (devlink_sb_index_exists(devlink, sb_index)) {
7541 err = -EEXIST;
7542 goto unlock;
7543 }
7544
7545 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
7546 if (!devlink_sb) {
7547 err = -ENOMEM;
7548 goto unlock;
7549 }
7550 devlink_sb->index = sb_index;
7551 devlink_sb->size = size;
7552 devlink_sb->ingress_pools_count = ingress_pools_count;
7553 devlink_sb->egress_pools_count = egress_pools_count;
7554 devlink_sb->ingress_tc_count = ingress_tc_count;
7555 devlink_sb->egress_tc_count = egress_tc_count;
7556 list_add_tail(&devlink_sb->list, &devlink->sb_list);
7557 unlock:
7558 mutex_unlock(&devlink->lock);
7559 return err;
7560 }
7561 EXPORT_SYMBOL_GPL(devlink_sb_register);
7562
7563 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
7564 {
7565 struct devlink_sb *devlink_sb;
7566
7567 mutex_lock(&devlink->lock);
7568 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
7569 WARN_ON(!devlink_sb);
7570 list_del(&devlink_sb->list);
7571 mutex_unlock(&devlink->lock);
7572 kfree(devlink_sb);
7573 }
7574 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
7575
7576 /**
7577 * devlink_dpipe_headers_register - register dpipe headers
7578 *
7579 * @devlink: devlink
7580 * @dpipe_headers: dpipe header array
7581 *
7582 * Register the headers supported by hardware.
7583 */
7584 int devlink_dpipe_headers_register(struct devlink *devlink,
7585 struct devlink_dpipe_headers *dpipe_headers)
7586 {
7587 mutex_lock(&devlink->lock);
7588 devlink->dpipe_headers = dpipe_headers;
7589 mutex_unlock(&devlink->lock);
7590 return 0;
7591 }
7592 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
7593
7594 /**
7595 * devlink_dpipe_headers_unregister - unregister dpipe headers
7596 *
7597 * @devlink: devlink
7598 *
7599 * Unregister the headers supported by hardware.
7600 */
7601 void devlink_dpipe_headers_unregister(struct devlink *devlink)
7602 {
7603 mutex_lock(&devlink->lock);
7604 devlink->dpipe_headers = NULL;
7605 mutex_unlock(&devlink->lock);
7606 }
7607 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
7608
7609 /**
7610 * devlink_dpipe_table_counter_enabled - check if counter allocation
7611 * required
7612 * @devlink: devlink
7613 * @table_name: tables name
7614 *
7615 * Used by driver to check if counter allocation is required.
7616 * After counter allocation is turned on the table entries
7617 * are updated to include counter statistics.
7618 *
7619 * After that point on the driver must respect the counter
7620 * state so that each entry added to the table is added
7621 * with a counter.
7622 */
7623 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
7624 const char *table_name)
7625 {
7626 struct devlink_dpipe_table *table;
7627 bool enabled;
7628
7629 rcu_read_lock();
7630 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7631 table_name, devlink);
7632 enabled = false;
7633 if (table)
7634 enabled = table->counters_enabled;
7635 rcu_read_unlock();
7636 return enabled;
7637 }
7638 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
7639
7640 /**
7641 * devlink_dpipe_table_register - register dpipe table
7642 *
7643 * @devlink: devlink
7644 * @table_name: table name
7645 * @table_ops: table ops
7646 * @priv: priv
7647 * @counter_control_extern: external control for counters
7648 */
7649 int devlink_dpipe_table_register(struct devlink *devlink,
7650 const char *table_name,
7651 struct devlink_dpipe_table_ops *table_ops,
7652 void *priv, bool counter_control_extern)
7653 {
7654 struct devlink_dpipe_table *table;
7655 int err = 0;
7656
7657 if (WARN_ON(!table_ops->size_get))
7658 return -EINVAL;
7659
7660 mutex_lock(&devlink->lock);
7661
7662 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
7663 devlink)) {
7664 err = -EEXIST;
7665 goto unlock;
7666 }
7667
7668 table = kzalloc(sizeof(*table), GFP_KERNEL);
7669 if (!table) {
7670 err = -ENOMEM;
7671 goto unlock;
7672 }
7673
7674 table->name = table_name;
7675 table->table_ops = table_ops;
7676 table->priv = priv;
7677 table->counter_control_extern = counter_control_extern;
7678
7679 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
7680 unlock:
7681 mutex_unlock(&devlink->lock);
7682 return err;
7683 }
7684 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
7685
7686 /**
7687 * devlink_dpipe_table_unregister - unregister dpipe table
7688 *
7689 * @devlink: devlink
7690 * @table_name: table name
7691 */
7692 void devlink_dpipe_table_unregister(struct devlink *devlink,
7693 const char *table_name)
7694 {
7695 struct devlink_dpipe_table *table;
7696
7697 mutex_lock(&devlink->lock);
7698 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7699 table_name, devlink);
7700 if (!table)
7701 goto unlock;
7702 list_del_rcu(&table->list);
7703 mutex_unlock(&devlink->lock);
7704 kfree_rcu(table, rcu);
7705 return;
7706 unlock:
7707 mutex_unlock(&devlink->lock);
7708 }
7709 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
7710
7711 /**
7712 * devlink_resource_register - devlink resource register
7713 *
7714 * @devlink: devlink
7715 * @resource_name: resource's name
7716 * @resource_size: resource's size
7717 * @resource_id: resource's id
7718 * @parent_resource_id: resource's parent id
7719 * @size_params: size parameters
7720 */
7721 int devlink_resource_register(struct devlink *devlink,
7722 const char *resource_name,
7723 u64 resource_size,
7724 u64 resource_id,
7725 u64 parent_resource_id,
7726 const struct devlink_resource_size_params *size_params)
7727 {
7728 struct devlink_resource *resource;
7729 struct list_head *resource_list;
7730 bool top_hierarchy;
7731 int err = 0;
7732
7733 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
7734
7735 mutex_lock(&devlink->lock);
7736 resource = devlink_resource_find(devlink, NULL, resource_id);
7737 if (resource) {
7738 err = -EINVAL;
7739 goto out;
7740 }
7741
7742 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
7743 if (!resource) {
7744 err = -ENOMEM;
7745 goto out;
7746 }
7747
7748 if (top_hierarchy) {
7749 resource_list = &devlink->resource_list;
7750 } else {
7751 struct devlink_resource *parent_resource;
7752
7753 parent_resource = devlink_resource_find(devlink, NULL,
7754 parent_resource_id);
7755 if (parent_resource) {
7756 resource_list = &parent_resource->resource_list;
7757 resource->parent = parent_resource;
7758 } else {
7759 kfree(resource);
7760 err = -EINVAL;
7761 goto out;
7762 }
7763 }
7764
7765 resource->name = resource_name;
7766 resource->size = resource_size;
7767 resource->size_new = resource_size;
7768 resource->id = resource_id;
7769 resource->size_valid = true;
7770 memcpy(&resource->size_params, size_params,
7771 sizeof(resource->size_params));
7772 INIT_LIST_HEAD(&resource->resource_list);
7773 list_add_tail(&resource->list, resource_list);
7774 out:
7775 mutex_unlock(&devlink->lock);
7776 return err;
7777 }
7778 EXPORT_SYMBOL_GPL(devlink_resource_register);
7779
7780 /**
7781 * devlink_resources_unregister - free all resources
7782 *
7783 * @devlink: devlink
7784 * @resource: resource
7785 */
7786 void devlink_resources_unregister(struct devlink *devlink,
7787 struct devlink_resource *resource)
7788 {
7789 struct devlink_resource *tmp, *child_resource;
7790 struct list_head *resource_list;
7791
7792 if (resource)
7793 resource_list = &resource->resource_list;
7794 else
7795 resource_list = &devlink->resource_list;
7796
7797 if (!resource)
7798 mutex_lock(&devlink->lock);
7799
7800 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
7801 devlink_resources_unregister(devlink, child_resource);
7802 list_del(&child_resource->list);
7803 kfree(child_resource);
7804 }
7805
7806 if (!resource)
7807 mutex_unlock(&devlink->lock);
7808 }
7809 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
7810
7811 /**
7812 * devlink_resource_size_get - get and update size
7813 *
7814 * @devlink: devlink
7815 * @resource_id: the requested resource id
7816 * @p_resource_size: ptr to update
7817 */
7818 int devlink_resource_size_get(struct devlink *devlink,
7819 u64 resource_id,
7820 u64 *p_resource_size)
7821 {
7822 struct devlink_resource *resource;
7823 int err = 0;
7824
7825 mutex_lock(&devlink->lock);
7826 resource = devlink_resource_find(devlink, NULL, resource_id);
7827 if (!resource) {
7828 err = -EINVAL;
7829 goto out;
7830 }
7831 *p_resource_size = resource->size_new;
7832 resource->size = resource->size_new;
7833 out:
7834 mutex_unlock(&devlink->lock);
7835 return err;
7836 }
7837 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7838
7839 /**
7840 * devlink_dpipe_table_resource_set - set the resource id
7841 *
7842 * @devlink: devlink
7843 * @table_name: table name
7844 * @resource_id: resource id
7845 * @resource_units: number of resource's units consumed per table's entry
7846 */
7847 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7848 const char *table_name, u64 resource_id,
7849 u64 resource_units)
7850 {
7851 struct devlink_dpipe_table *table;
7852 int err = 0;
7853
7854 mutex_lock(&devlink->lock);
7855 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7856 table_name, devlink);
7857 if (!table) {
7858 err = -EINVAL;
7859 goto out;
7860 }
7861 table->resource_id = resource_id;
7862 table->resource_units = resource_units;
7863 table->resource_valid = true;
7864 out:
7865 mutex_unlock(&devlink->lock);
7866 return err;
7867 }
7868 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7869
7870 /**
7871 * devlink_resource_occ_get_register - register occupancy getter
7872 *
7873 * @devlink: devlink
7874 * @resource_id: resource id
7875 * @occ_get: occupancy getter callback
7876 * @occ_get_priv: occupancy getter callback priv
7877 */
7878 void devlink_resource_occ_get_register(struct devlink *devlink,
7879 u64 resource_id,
7880 devlink_resource_occ_get_t *occ_get,
7881 void *occ_get_priv)
7882 {
7883 struct devlink_resource *resource;
7884
7885 mutex_lock(&devlink->lock);
7886 resource = devlink_resource_find(devlink, NULL, resource_id);
7887 if (WARN_ON(!resource))
7888 goto out;
7889 WARN_ON(resource->occ_get);
7890
7891 resource->occ_get = occ_get;
7892 resource->occ_get_priv = occ_get_priv;
7893 out:
7894 mutex_unlock(&devlink->lock);
7895 }
7896 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7897
7898 /**
7899 * devlink_resource_occ_get_unregister - unregister occupancy getter
7900 *
7901 * @devlink: devlink
7902 * @resource_id: resource id
7903 */
7904 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7905 u64 resource_id)
7906 {
7907 struct devlink_resource *resource;
7908
7909 mutex_lock(&devlink->lock);
7910 resource = devlink_resource_find(devlink, NULL, resource_id);
7911 if (WARN_ON(!resource))
7912 goto out;
7913 WARN_ON(!resource->occ_get);
7914
7915 resource->occ_get = NULL;
7916 resource->occ_get_priv = NULL;
7917 out:
7918 mutex_unlock(&devlink->lock);
7919 }
7920 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7921
7922 static int devlink_param_verify(const struct devlink_param *param)
7923 {
7924 if (!param || !param->name || !param->supported_cmodes)
7925 return -EINVAL;
7926 if (param->generic)
7927 return devlink_param_generic_verify(param);
7928 else
7929 return devlink_param_driver_verify(param);
7930 }
7931
7932 static int __devlink_params_register(struct devlink *devlink,
7933 unsigned int port_index,
7934 struct list_head *param_list,
7935 const struct devlink_param *params,
7936 size_t params_count,
7937 enum devlink_command reg_cmd,
7938 enum devlink_command unreg_cmd)
7939 {
7940 const struct devlink_param *param = params;
7941 int i;
7942 int err;
7943
7944 mutex_lock(&devlink->lock);
7945 for (i = 0; i < params_count; i++, param++) {
7946 err = devlink_param_verify(param);
7947 if (err)
7948 goto rollback;
7949
7950 err = devlink_param_register_one(devlink, port_index,
7951 param_list, param, reg_cmd);
7952 if (err)
7953 goto rollback;
7954 }
7955
7956 mutex_unlock(&devlink->lock);
7957 return 0;
7958
7959 rollback:
7960 if (!i)
7961 goto unlock;
7962 for (param--; i > 0; i--, param--)
7963 devlink_param_unregister_one(devlink, port_index, param_list,
7964 param, unreg_cmd);
7965 unlock:
7966 mutex_unlock(&devlink->lock);
7967 return err;
7968 }
7969
7970 static void __devlink_params_unregister(struct devlink *devlink,
7971 unsigned int port_index,
7972 struct list_head *param_list,
7973 const struct devlink_param *params,
7974 size_t params_count,
7975 enum devlink_command cmd)
7976 {
7977 const struct devlink_param *param = params;
7978 int i;
7979
7980 mutex_lock(&devlink->lock);
7981 for (i = 0; i < params_count; i++, param++)
7982 devlink_param_unregister_one(devlink, 0, param_list, param,
7983 cmd);
7984 mutex_unlock(&devlink->lock);
7985 }
7986
7987 /**
7988 * devlink_params_register - register configuration parameters
7989 *
7990 * @devlink: devlink
7991 * @params: configuration parameters array
7992 * @params_count: number of parameters provided
7993 *
7994 * Register the configuration parameters supported by the driver.
7995 */
7996 int devlink_params_register(struct devlink *devlink,
7997 const struct devlink_param *params,
7998 size_t params_count)
7999 {
8000 return __devlink_params_register(devlink, 0, &devlink->param_list,
8001 params, params_count,
8002 DEVLINK_CMD_PARAM_NEW,
8003 DEVLINK_CMD_PARAM_DEL);
8004 }
8005 EXPORT_SYMBOL_GPL(devlink_params_register);
8006
8007 /**
8008 * devlink_params_unregister - unregister configuration parameters
8009 * @devlink: devlink
8010 * @params: configuration parameters to unregister
8011 * @params_count: number of parameters provided
8012 */
8013 void devlink_params_unregister(struct devlink *devlink,
8014 const struct devlink_param *params,
8015 size_t params_count)
8016 {
8017 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
8018 params, params_count,
8019 DEVLINK_CMD_PARAM_DEL);
8020 }
8021 EXPORT_SYMBOL_GPL(devlink_params_unregister);
8022
8023 /**
8024 * devlink_params_publish - publish configuration parameters
8025 *
8026 * @devlink: devlink
8027 *
8028 * Publish previously registered configuration parameters.
8029 */
8030 void devlink_params_publish(struct devlink *devlink)
8031 {
8032 struct devlink_param_item *param_item;
8033
8034 list_for_each_entry(param_item, &devlink->param_list, list) {
8035 if (param_item->published)
8036 continue;
8037 param_item->published = true;
8038 devlink_param_notify(devlink, 0, param_item,
8039 DEVLINK_CMD_PARAM_NEW);
8040 }
8041 }
8042 EXPORT_SYMBOL_GPL(devlink_params_publish);
8043
8044 /**
8045 * devlink_params_unpublish - unpublish configuration parameters
8046 *
8047 * @devlink: devlink
8048 *
8049 * Unpublish previously registered configuration parameters.
8050 */
8051 void devlink_params_unpublish(struct devlink *devlink)
8052 {
8053 struct devlink_param_item *param_item;
8054
8055 list_for_each_entry(param_item, &devlink->param_list, list) {
8056 if (!param_item->published)
8057 continue;
8058 param_item->published = false;
8059 devlink_param_notify(devlink, 0, param_item,
8060 DEVLINK_CMD_PARAM_DEL);
8061 }
8062 }
8063 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
8064
8065 /**
8066 * devlink_port_params_register - register port configuration parameters
8067 *
8068 * @devlink_port: devlink port
8069 * @params: configuration parameters array
8070 * @params_count: number of parameters provided
8071 *
8072 * Register the configuration parameters supported by the port.
8073 */
8074 int devlink_port_params_register(struct devlink_port *devlink_port,
8075 const struct devlink_param *params,
8076 size_t params_count)
8077 {
8078 return __devlink_params_register(devlink_port->devlink,
8079 devlink_port->index,
8080 &devlink_port->param_list, params,
8081 params_count,
8082 DEVLINK_CMD_PORT_PARAM_NEW,
8083 DEVLINK_CMD_PORT_PARAM_DEL);
8084 }
8085 EXPORT_SYMBOL_GPL(devlink_port_params_register);
8086
8087 /**
8088 * devlink_port_params_unregister - unregister port configuration
8089 * parameters
8090 *
8091 * @devlink_port: devlink port
8092 * @params: configuration parameters array
8093 * @params_count: number of parameters provided
8094 */
8095 void devlink_port_params_unregister(struct devlink_port *devlink_port,
8096 const struct devlink_param *params,
8097 size_t params_count)
8098 {
8099 return __devlink_params_unregister(devlink_port->devlink,
8100 devlink_port->index,
8101 &devlink_port->param_list,
8102 params, params_count,
8103 DEVLINK_CMD_PORT_PARAM_DEL);
8104 }
8105 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
8106
8107 static int
8108 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
8109 union devlink_param_value *init_val)
8110 {
8111 struct devlink_param_item *param_item;
8112
8113 param_item = devlink_param_find_by_id(param_list, param_id);
8114 if (!param_item)
8115 return -EINVAL;
8116
8117 if (!param_item->driverinit_value_valid ||
8118 !devlink_param_cmode_is_supported(param_item->param,
8119 DEVLINK_PARAM_CMODE_DRIVERINIT))
8120 return -EOPNOTSUPP;
8121
8122 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8123 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
8124 else
8125 *init_val = param_item->driverinit_value;
8126
8127 return 0;
8128 }
8129
8130 static int
8131 __devlink_param_driverinit_value_set(struct devlink *devlink,
8132 unsigned int port_index,
8133 struct list_head *param_list, u32 param_id,
8134 union devlink_param_value init_val,
8135 enum devlink_command cmd)
8136 {
8137 struct devlink_param_item *param_item;
8138
8139 param_item = devlink_param_find_by_id(param_list, param_id);
8140 if (!param_item)
8141 return -EINVAL;
8142
8143 if (!devlink_param_cmode_is_supported(param_item->param,
8144 DEVLINK_PARAM_CMODE_DRIVERINIT))
8145 return -EOPNOTSUPP;
8146
8147 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8148 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
8149 else
8150 param_item->driverinit_value = init_val;
8151 param_item->driverinit_value_valid = true;
8152
8153 devlink_param_notify(devlink, port_index, param_item, cmd);
8154 return 0;
8155 }
8156
8157 /**
8158 * devlink_param_driverinit_value_get - get configuration parameter
8159 * value for driver initializing
8160 *
8161 * @devlink: devlink
8162 * @param_id: parameter ID
8163 * @init_val: value of parameter in driverinit configuration mode
8164 *
8165 * This function should be used by the driver to get driverinit
8166 * configuration for initialization after reload command.
8167 */
8168 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
8169 union devlink_param_value *init_val)
8170 {
8171 if (!devlink_reload_supported(devlink))
8172 return -EOPNOTSUPP;
8173
8174 return __devlink_param_driverinit_value_get(&devlink->param_list,
8175 param_id, init_val);
8176 }
8177 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
8178
8179 /**
8180 * devlink_param_driverinit_value_set - set value of configuration
8181 * parameter for driverinit
8182 * configuration mode
8183 *
8184 * @devlink: devlink
8185 * @param_id: parameter ID
8186 * @init_val: value of parameter to set for driverinit configuration mode
8187 *
8188 * This function should be used by the driver to set driverinit
8189 * configuration mode default value.
8190 */
8191 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
8192 union devlink_param_value init_val)
8193 {
8194 return __devlink_param_driverinit_value_set(devlink, 0,
8195 &devlink->param_list,
8196 param_id, init_val,
8197 DEVLINK_CMD_PARAM_NEW);
8198 }
8199 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
8200
8201 /**
8202 * devlink_port_param_driverinit_value_get - get configuration parameter
8203 * value for driver initializing
8204 *
8205 * @devlink_port: devlink_port
8206 * @param_id: parameter ID
8207 * @init_val: value of parameter in driverinit configuration mode
8208 *
8209 * This function should be used by the driver to get driverinit
8210 * configuration for initialization after reload command.
8211 */
8212 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
8213 u32 param_id,
8214 union devlink_param_value *init_val)
8215 {
8216 struct devlink *devlink = devlink_port->devlink;
8217
8218 if (!devlink_reload_supported(devlink))
8219 return -EOPNOTSUPP;
8220
8221 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
8222 param_id, init_val);
8223 }
8224 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
8225
8226 /**
8227 * devlink_port_param_driverinit_value_set - set value of configuration
8228 * parameter for driverinit
8229 * configuration mode
8230 *
8231 * @devlink_port: devlink_port
8232 * @param_id: parameter ID
8233 * @init_val: value of parameter to set for driverinit configuration mode
8234 *
8235 * This function should be used by the driver to set driverinit
8236 * configuration mode default value.
8237 */
8238 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
8239 u32 param_id,
8240 union devlink_param_value init_val)
8241 {
8242 return __devlink_param_driverinit_value_set(devlink_port->devlink,
8243 devlink_port->index,
8244 &devlink_port->param_list,
8245 param_id, init_val,
8246 DEVLINK_CMD_PORT_PARAM_NEW);
8247 }
8248 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
8249
8250 /**
8251 * devlink_param_value_changed - notify devlink on a parameter's value
8252 * change. Should be called by the driver
8253 * right after the change.
8254 *
8255 * @devlink: devlink
8256 * @param_id: parameter ID
8257 *
8258 * This function should be used by the driver to notify devlink on value
8259 * change, excluding driverinit configuration mode.
8260 * For driverinit configuration mode driver should use the function
8261 */
8262 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
8263 {
8264 struct devlink_param_item *param_item;
8265
8266 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
8267 WARN_ON(!param_item);
8268
8269 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
8270 }
8271 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
8272
8273 /**
8274 * devlink_port_param_value_changed - notify devlink on a parameter's value
8275 * change. Should be called by the driver
8276 * right after the change.
8277 *
8278 * @devlink_port: devlink_port
8279 * @param_id: parameter ID
8280 *
8281 * This function should be used by the driver to notify devlink on value
8282 * change, excluding driverinit configuration mode.
8283 * For driverinit configuration mode driver should use the function
8284 * devlink_port_param_driverinit_value_set() instead.
8285 */
8286 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
8287 u32 param_id)
8288 {
8289 struct devlink_param_item *param_item;
8290
8291 param_item = devlink_param_find_by_id(&devlink_port->param_list,
8292 param_id);
8293 WARN_ON(!param_item);
8294
8295 devlink_param_notify(devlink_port->devlink, devlink_port->index,
8296 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
8297 }
8298 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
8299
8300 /**
8301 * devlink_param_value_str_fill - Safely fill-up the string preventing
8302 * from overflow of the preallocated buffer
8303 *
8304 * @dst_val: destination devlink_param_value
8305 * @src: source buffer
8306 */
8307 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
8308 const char *src)
8309 {
8310 size_t len;
8311
8312 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
8313 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
8314 }
8315 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
8316
8317 /**
8318 * devlink_region_create - create a new address region
8319 *
8320 * @devlink: devlink
8321 * @ops: region operations and name
8322 * @region_max_snapshots: Maximum supported number of snapshots for region
8323 * @region_size: size of region
8324 */
8325 struct devlink_region *
8326 devlink_region_create(struct devlink *devlink,
8327 const struct devlink_region_ops *ops,
8328 u32 region_max_snapshots, u64 region_size)
8329 {
8330 struct devlink_region *region;
8331 int err = 0;
8332
8333 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
8334 return ERR_PTR(-EINVAL);
8335
8336 mutex_lock(&devlink->lock);
8337
8338 if (devlink_region_get_by_name(devlink, ops->name)) {
8339 err = -EEXIST;
8340 goto unlock;
8341 }
8342
8343 region = kzalloc(sizeof(*region), GFP_KERNEL);
8344 if (!region) {
8345 err = -ENOMEM;
8346 goto unlock;
8347 }
8348
8349 region->devlink = devlink;
8350 region->max_snapshots = region_max_snapshots;
8351 region->ops = ops;
8352 region->size = region_size;
8353 INIT_LIST_HEAD(&region->snapshot_list);
8354 list_add_tail(&region->list, &devlink->region_list);
8355 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
8356
8357 mutex_unlock(&devlink->lock);
8358 return region;
8359
8360 unlock:
8361 mutex_unlock(&devlink->lock);
8362 return ERR_PTR(err);
8363 }
8364 EXPORT_SYMBOL_GPL(devlink_region_create);
8365
8366 /**
8367 * devlink_region_destroy - destroy address region
8368 *
8369 * @region: devlink region to destroy
8370 */
8371 void devlink_region_destroy(struct devlink_region *region)
8372 {
8373 struct devlink *devlink = region->devlink;
8374 struct devlink_snapshot *snapshot, *ts;
8375
8376 mutex_lock(&devlink->lock);
8377
8378 /* Free all snapshots of region */
8379 list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
8380 devlink_region_snapshot_del(region, snapshot);
8381
8382 list_del(&region->list);
8383
8384 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
8385 mutex_unlock(&devlink->lock);
8386 kfree(region);
8387 }
8388 EXPORT_SYMBOL_GPL(devlink_region_destroy);
8389
8390 /**
8391 * devlink_region_snapshot_id_get - get snapshot ID
8392 *
8393 * This callback should be called when adding a new snapshot,
8394 * Driver should use the same id for multiple snapshots taken
8395 * on multiple regions at the same time/by the same trigger.
8396 *
8397 * The caller of this function must use devlink_region_snapshot_id_put
8398 * when finished creating regions using this id.
8399 *
8400 * Returns zero on success, or a negative error code on failure.
8401 *
8402 * @devlink: devlink
8403 * @id: storage to return id
8404 */
8405 int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
8406 {
8407 int err;
8408
8409 mutex_lock(&devlink->lock);
8410 err = __devlink_region_snapshot_id_get(devlink, id);
8411 mutex_unlock(&devlink->lock);
8412
8413 return err;
8414 }
8415 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
8416
8417 /**
8418 * devlink_region_snapshot_id_put - put snapshot ID reference
8419 *
8420 * This should be called by a driver after finishing creating snapshots
8421 * with an id. Doing so ensures that the ID can later be released in the
8422 * event that all snapshots using it have been destroyed.
8423 *
8424 * @devlink: devlink
8425 * @id: id to release reference on
8426 */
8427 void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
8428 {
8429 mutex_lock(&devlink->lock);
8430 __devlink_snapshot_id_decrement(devlink, id);
8431 mutex_unlock(&devlink->lock);
8432 }
8433 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
8434
8435 /**
8436 * devlink_region_snapshot_create - create a new snapshot
8437 * This will add a new snapshot of a region. The snapshot
8438 * will be stored on the region struct and can be accessed
8439 * from devlink. This is useful for future analyses of snapshots.
8440 * Multiple snapshots can be created on a region.
8441 * The @snapshot_id should be obtained using the getter function.
8442 *
8443 * @region: devlink region of the snapshot
8444 * @data: snapshot data
8445 * @snapshot_id: snapshot id to be created
8446 */
8447 int devlink_region_snapshot_create(struct devlink_region *region,
8448 u8 *data, u32 snapshot_id)
8449 {
8450 struct devlink *devlink = region->devlink;
8451 int err;
8452
8453 mutex_lock(&devlink->lock);
8454 err = __devlink_region_snapshot_create(region, data, snapshot_id);
8455 mutex_unlock(&devlink->lock);
8456
8457 return err;
8458 }
8459 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
8460
8461 #define DEVLINK_TRAP(_id, _type) \
8462 { \
8463 .type = DEVLINK_TRAP_TYPE_##_type, \
8464 .id = DEVLINK_TRAP_GENERIC_ID_##_id, \
8465 .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
8466 }
8467
8468 static const struct devlink_trap devlink_trap_generic[] = {
8469 DEVLINK_TRAP(SMAC_MC, DROP),
8470 DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
8471 DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
8472 DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
8473 DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
8474 DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
8475 DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
8476 DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
8477 DEVLINK_TRAP(TAIL_DROP, DROP),
8478 DEVLINK_TRAP(NON_IP_PACKET, DROP),
8479 DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
8480 DEVLINK_TRAP(DIP_LB, DROP),
8481 DEVLINK_TRAP(SIP_MC, DROP),
8482 DEVLINK_TRAP(SIP_LB, DROP),
8483 DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
8484 DEVLINK_TRAP(IPV4_SIP_BC, DROP),
8485 DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
8486 DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
8487 DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
8488 DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
8489 DEVLINK_TRAP(RPF, EXCEPTION),
8490 DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
8491 DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
8492 DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
8493 DEVLINK_TRAP(NON_ROUTABLE, DROP),
8494 DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
8495 DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
8496 DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
8497 DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
8498 DEVLINK_TRAP(STP, CONTROL),
8499 DEVLINK_TRAP(LACP, CONTROL),
8500 DEVLINK_TRAP(LLDP, CONTROL),
8501 DEVLINK_TRAP(IGMP_QUERY, CONTROL),
8502 DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL),
8503 DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL),
8504 DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL),
8505 DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL),
8506 DEVLINK_TRAP(MLD_QUERY, CONTROL),
8507 DEVLINK_TRAP(MLD_V1_REPORT, CONTROL),
8508 DEVLINK_TRAP(MLD_V2_REPORT, CONTROL),
8509 DEVLINK_TRAP(MLD_V1_DONE, CONTROL),
8510 DEVLINK_TRAP(IPV4_DHCP, CONTROL),
8511 DEVLINK_TRAP(IPV6_DHCP, CONTROL),
8512 DEVLINK_TRAP(ARP_REQUEST, CONTROL),
8513 DEVLINK_TRAP(ARP_RESPONSE, CONTROL),
8514 DEVLINK_TRAP(ARP_OVERLAY, CONTROL),
8515 DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL),
8516 DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL),
8517 DEVLINK_TRAP(IPV4_BFD, CONTROL),
8518 DEVLINK_TRAP(IPV6_BFD, CONTROL),
8519 DEVLINK_TRAP(IPV4_OSPF, CONTROL),
8520 DEVLINK_TRAP(IPV6_OSPF, CONTROL),
8521 DEVLINK_TRAP(IPV4_BGP, CONTROL),
8522 DEVLINK_TRAP(IPV6_BGP, CONTROL),
8523 DEVLINK_TRAP(IPV4_VRRP, CONTROL),
8524 DEVLINK_TRAP(IPV6_VRRP, CONTROL),
8525 DEVLINK_TRAP(IPV4_PIM, CONTROL),
8526 DEVLINK_TRAP(IPV6_PIM, CONTROL),
8527 DEVLINK_TRAP(UC_LB, CONTROL),
8528 DEVLINK_TRAP(LOCAL_ROUTE, CONTROL),
8529 DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL),
8530 DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL),
8531 DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL),
8532 DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL),
8533 DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL),
8534 DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL),
8535 DEVLINK_TRAP(IPV6_REDIRECT, CONTROL),
8536 DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL),
8537 DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL),
8538 DEVLINK_TRAP(PTP_EVENT, CONTROL),
8539 DEVLINK_TRAP(PTP_GENERAL, CONTROL),
8540 DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL),
8541 DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL),
8542 };
8543
8544 #define DEVLINK_TRAP_GROUP(_id) \
8545 { \
8546 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
8547 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
8548 }
8549
8550 static const struct devlink_trap_group devlink_trap_group_generic[] = {
8551 DEVLINK_TRAP_GROUP(L2_DROPS),
8552 DEVLINK_TRAP_GROUP(L3_DROPS),
8553 DEVLINK_TRAP_GROUP(L3_EXCEPTIONS),
8554 DEVLINK_TRAP_GROUP(BUFFER_DROPS),
8555 DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
8556 DEVLINK_TRAP_GROUP(ACL_DROPS),
8557 DEVLINK_TRAP_GROUP(STP),
8558 DEVLINK_TRAP_GROUP(LACP),
8559 DEVLINK_TRAP_GROUP(LLDP),
8560 DEVLINK_TRAP_GROUP(MC_SNOOPING),
8561 DEVLINK_TRAP_GROUP(DHCP),
8562 DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY),
8563 DEVLINK_TRAP_GROUP(BFD),
8564 DEVLINK_TRAP_GROUP(OSPF),
8565 DEVLINK_TRAP_GROUP(BGP),
8566 DEVLINK_TRAP_GROUP(VRRP),
8567 DEVLINK_TRAP_GROUP(PIM),
8568 DEVLINK_TRAP_GROUP(UC_LB),
8569 DEVLINK_TRAP_GROUP(LOCAL_DELIVERY),
8570 DEVLINK_TRAP_GROUP(IPV6),
8571 DEVLINK_TRAP_GROUP(PTP_EVENT),
8572 DEVLINK_TRAP_GROUP(PTP_GENERAL),
8573 DEVLINK_TRAP_GROUP(ACL_SAMPLE),
8574 DEVLINK_TRAP_GROUP(ACL_TRAP),
8575 };
8576
8577 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
8578 {
8579 if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
8580 return -EINVAL;
8581
8582 if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
8583 return -EINVAL;
8584
8585 if (trap->type != devlink_trap_generic[trap->id].type)
8586 return -EINVAL;
8587
8588 return 0;
8589 }
8590
8591 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
8592 {
8593 int i;
8594
8595 if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
8596 return -EINVAL;
8597
8598 for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
8599 if (!strcmp(trap->name, devlink_trap_generic[i].name))
8600 return -EEXIST;
8601 }
8602
8603 return 0;
8604 }
8605
8606 static int devlink_trap_verify(const struct devlink_trap *trap)
8607 {
8608 if (!trap || !trap->name)
8609 return -EINVAL;
8610
8611 if (trap->generic)
8612 return devlink_trap_generic_verify(trap);
8613 else
8614 return devlink_trap_driver_verify(trap);
8615 }
8616
8617 static int
8618 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
8619 {
8620 if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8621 return -EINVAL;
8622
8623 if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
8624 return -EINVAL;
8625
8626 return 0;
8627 }
8628
8629 static int
8630 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
8631 {
8632 int i;
8633
8634 if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8635 return -EINVAL;
8636
8637 for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
8638 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
8639 return -EEXIST;
8640 }
8641
8642 return 0;
8643 }
8644
8645 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
8646 {
8647 if (group->generic)
8648 return devlink_trap_group_generic_verify(group);
8649 else
8650 return devlink_trap_group_driver_verify(group);
8651 }
8652
8653 static void
8654 devlink_trap_group_notify(struct devlink *devlink,
8655 const struct devlink_trap_group_item *group_item,
8656 enum devlink_command cmd)
8657 {
8658 struct sk_buff *msg;
8659 int err;
8660
8661 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
8662 cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
8663
8664 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8665 if (!msg)
8666 return;
8667
8668 err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
8669 0);
8670 if (err) {
8671 nlmsg_free(msg);
8672 return;
8673 }
8674
8675 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8676 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8677 }
8678
8679 static int
8680 devlink_trap_item_group_link(struct devlink *devlink,
8681 struct devlink_trap_item *trap_item)
8682 {
8683 u16 group_id = trap_item->trap->init_group_id;
8684 struct devlink_trap_group_item *group_item;
8685
8686 group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
8687 if (WARN_ON_ONCE(!group_item))
8688 return -EINVAL;
8689
8690 trap_item->group_item = group_item;
8691
8692 return 0;
8693 }
8694
8695 static void devlink_trap_notify(struct devlink *devlink,
8696 const struct devlink_trap_item *trap_item,
8697 enum devlink_command cmd)
8698 {
8699 struct sk_buff *msg;
8700 int err;
8701
8702 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
8703 cmd != DEVLINK_CMD_TRAP_DEL);
8704
8705 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8706 if (!msg)
8707 return;
8708
8709 err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
8710 if (err) {
8711 nlmsg_free(msg);
8712 return;
8713 }
8714
8715 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8716 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8717 }
8718
8719 static int
8720 devlink_trap_register(struct devlink *devlink,
8721 const struct devlink_trap *trap, void *priv)
8722 {
8723 struct devlink_trap_item *trap_item;
8724 int err;
8725
8726 if (devlink_trap_item_lookup(devlink, trap->name))
8727 return -EEXIST;
8728
8729 trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
8730 if (!trap_item)
8731 return -ENOMEM;
8732
8733 trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8734 if (!trap_item->stats) {
8735 err = -ENOMEM;
8736 goto err_stats_alloc;
8737 }
8738
8739 trap_item->trap = trap;
8740 trap_item->action = trap->init_action;
8741 trap_item->priv = priv;
8742
8743 err = devlink_trap_item_group_link(devlink, trap_item);
8744 if (err)
8745 goto err_group_link;
8746
8747 err = devlink->ops->trap_init(devlink, trap, trap_item);
8748 if (err)
8749 goto err_trap_init;
8750
8751 list_add_tail(&trap_item->list, &devlink->trap_list);
8752 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
8753
8754 return 0;
8755
8756 err_trap_init:
8757 err_group_link:
8758 free_percpu(trap_item->stats);
8759 err_stats_alloc:
8760 kfree(trap_item);
8761 return err;
8762 }
8763
8764 static void devlink_trap_unregister(struct devlink *devlink,
8765 const struct devlink_trap *trap)
8766 {
8767 struct devlink_trap_item *trap_item;
8768
8769 trap_item = devlink_trap_item_lookup(devlink, trap->name);
8770 if (WARN_ON_ONCE(!trap_item))
8771 return;
8772
8773 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
8774 list_del(&trap_item->list);
8775 if (devlink->ops->trap_fini)
8776 devlink->ops->trap_fini(devlink, trap, trap_item);
8777 free_percpu(trap_item->stats);
8778 kfree(trap_item);
8779 }
8780
8781 static void devlink_trap_disable(struct devlink *devlink,
8782 const struct devlink_trap *trap)
8783 {
8784 struct devlink_trap_item *trap_item;
8785
8786 trap_item = devlink_trap_item_lookup(devlink, trap->name);
8787 if (WARN_ON_ONCE(!trap_item))
8788 return;
8789
8790 devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
8791 trap_item->action = DEVLINK_TRAP_ACTION_DROP;
8792 }
8793
8794 /**
8795 * devlink_traps_register - Register packet traps with devlink.
8796 * @devlink: devlink.
8797 * @traps: Packet traps.
8798 * @traps_count: Count of provided packet traps.
8799 * @priv: Driver private information.
8800 *
8801 * Return: Non-zero value on failure.
8802 */
8803 int devlink_traps_register(struct devlink *devlink,
8804 const struct devlink_trap *traps,
8805 size_t traps_count, void *priv)
8806 {
8807 int i, err;
8808
8809 if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8810 return -EINVAL;
8811
8812 mutex_lock(&devlink->lock);
8813 for (i = 0; i < traps_count; i++) {
8814 const struct devlink_trap *trap = &traps[i];
8815
8816 err = devlink_trap_verify(trap);
8817 if (err)
8818 goto err_trap_verify;
8819
8820 err = devlink_trap_register(devlink, trap, priv);
8821 if (err)
8822 goto err_trap_register;
8823 }
8824 mutex_unlock(&devlink->lock);
8825
8826 return 0;
8827
8828 err_trap_register:
8829 err_trap_verify:
8830 for (i--; i >= 0; i--)
8831 devlink_trap_unregister(devlink, &traps[i]);
8832 mutex_unlock(&devlink->lock);
8833 return err;
8834 }
8835 EXPORT_SYMBOL_GPL(devlink_traps_register);
8836
8837 /**
8838 * devlink_traps_unregister - Unregister packet traps from devlink.
8839 * @devlink: devlink.
8840 * @traps: Packet traps.
8841 * @traps_count: Count of provided packet traps.
8842 */
8843 void devlink_traps_unregister(struct devlink *devlink,
8844 const struct devlink_trap *traps,
8845 size_t traps_count)
8846 {
8847 int i;
8848
8849 mutex_lock(&devlink->lock);
8850 /* Make sure we do not have any packets in-flight while unregistering
8851 * traps by disabling all of them and waiting for a grace period.
8852 */
8853 for (i = traps_count - 1; i >= 0; i--)
8854 devlink_trap_disable(devlink, &traps[i]);
8855 synchronize_rcu();
8856 for (i = traps_count - 1; i >= 0; i--)
8857 devlink_trap_unregister(devlink, &traps[i]);
8858 mutex_unlock(&devlink->lock);
8859 }
8860 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8861
8862 static void
8863 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8864 size_t skb_len)
8865 {
8866 struct devlink_stats *stats;
8867
8868 stats = this_cpu_ptr(trap_stats);
8869 u64_stats_update_begin(&stats->syncp);
8870 stats->rx_bytes += skb_len;
8871 stats->rx_packets++;
8872 u64_stats_update_end(&stats->syncp);
8873 }
8874
8875 static void
8876 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8877 const struct devlink_trap_item *trap_item,
8878 struct devlink_port *in_devlink_port,
8879 const struct flow_action_cookie *fa_cookie)
8880 {
8881 struct devlink_trap_group_item *group_item = trap_item->group_item;
8882
8883 hw_metadata->trap_group_name = group_item->group->name;
8884 hw_metadata->trap_name = trap_item->trap->name;
8885 hw_metadata->fa_cookie = fa_cookie;
8886
8887 spin_lock(&in_devlink_port->type_lock);
8888 if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8889 hw_metadata->input_dev = in_devlink_port->type_dev;
8890 spin_unlock(&in_devlink_port->type_lock);
8891 }
8892
8893 /**
8894 * devlink_trap_report - Report trapped packet to drop monitor.
8895 * @devlink: devlink.
8896 * @skb: Trapped packet.
8897 * @trap_ctx: Trap context.
8898 * @in_devlink_port: Input devlink port.
8899 * @fa_cookie: Flow action cookie. Could be NULL.
8900 */
8901 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8902 void *trap_ctx, struct devlink_port *in_devlink_port,
8903 const struct flow_action_cookie *fa_cookie)
8904
8905 {
8906 struct devlink_trap_item *trap_item = trap_ctx;
8907 struct net_dm_hw_metadata hw_metadata = {};
8908
8909 devlink_trap_stats_update(trap_item->stats, skb->len);
8910 devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8911
8912 /* Control packets were not dropped by the device or encountered an
8913 * exception during forwarding and therefore should not be reported to
8914 * the kernel's drop monitor.
8915 */
8916 if (trap_item->trap->type == DEVLINK_TRAP_TYPE_CONTROL)
8917 return;
8918
8919 devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8920 in_devlink_port, fa_cookie);
8921 net_dm_hw_report(skb, &hw_metadata);
8922 }
8923 EXPORT_SYMBOL_GPL(devlink_trap_report);
8924
8925 /**
8926 * devlink_trap_ctx_priv - Trap context to driver private information.
8927 * @trap_ctx: Trap context.
8928 *
8929 * Return: Driver private information passed during registration.
8930 */
8931 void *devlink_trap_ctx_priv(void *trap_ctx)
8932 {
8933 struct devlink_trap_item *trap_item = trap_ctx;
8934
8935 return trap_item->priv;
8936 }
8937 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8938
8939 static int
8940 devlink_trap_group_item_policer_link(struct devlink *devlink,
8941 struct devlink_trap_group_item *group_item)
8942 {
8943 u32 policer_id = group_item->group->init_policer_id;
8944 struct devlink_trap_policer_item *policer_item;
8945
8946 if (policer_id == 0)
8947 return 0;
8948
8949 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
8950 if (WARN_ON_ONCE(!policer_item))
8951 return -EINVAL;
8952
8953 group_item->policer_item = policer_item;
8954
8955 return 0;
8956 }
8957
8958 static int
8959 devlink_trap_group_register(struct devlink *devlink,
8960 const struct devlink_trap_group *group)
8961 {
8962 struct devlink_trap_group_item *group_item;
8963 int err;
8964
8965 if (devlink_trap_group_item_lookup(devlink, group->name))
8966 return -EEXIST;
8967
8968 group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
8969 if (!group_item)
8970 return -ENOMEM;
8971
8972 group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8973 if (!group_item->stats) {
8974 err = -ENOMEM;
8975 goto err_stats_alloc;
8976 }
8977
8978 group_item->group = group;
8979
8980 err = devlink_trap_group_item_policer_link(devlink, group_item);
8981 if (err)
8982 goto err_policer_link;
8983
8984 if (devlink->ops->trap_group_init) {
8985 err = devlink->ops->trap_group_init(devlink, group);
8986 if (err)
8987 goto err_group_init;
8988 }
8989
8990 list_add_tail(&group_item->list, &devlink->trap_group_list);
8991 devlink_trap_group_notify(devlink, group_item,
8992 DEVLINK_CMD_TRAP_GROUP_NEW);
8993
8994 return 0;
8995
8996 err_group_init:
8997 err_policer_link:
8998 free_percpu(group_item->stats);
8999 err_stats_alloc:
9000 kfree(group_item);
9001 return err;
9002 }
9003
9004 static void
9005 devlink_trap_group_unregister(struct devlink *devlink,
9006 const struct devlink_trap_group *group)
9007 {
9008 struct devlink_trap_group_item *group_item;
9009
9010 group_item = devlink_trap_group_item_lookup(devlink, group->name);
9011 if (WARN_ON_ONCE(!group_item))
9012 return;
9013
9014 devlink_trap_group_notify(devlink, group_item,
9015 DEVLINK_CMD_TRAP_GROUP_DEL);
9016 list_del(&group_item->list);
9017 free_percpu(group_item->stats);
9018 kfree(group_item);
9019 }
9020
9021 /**
9022 * devlink_trap_groups_register - Register packet trap groups with devlink.
9023 * @devlink: devlink.
9024 * @groups: Packet trap groups.
9025 * @groups_count: Count of provided packet trap groups.
9026 *
9027 * Return: Non-zero value on failure.
9028 */
9029 int devlink_trap_groups_register(struct devlink *devlink,
9030 const struct devlink_trap_group *groups,
9031 size_t groups_count)
9032 {
9033 int i, err;
9034
9035 mutex_lock(&devlink->lock);
9036 for (i = 0; i < groups_count; i++) {
9037 const struct devlink_trap_group *group = &groups[i];
9038
9039 err = devlink_trap_group_verify(group);
9040 if (err)
9041 goto err_trap_group_verify;
9042
9043 err = devlink_trap_group_register(devlink, group);
9044 if (err)
9045 goto err_trap_group_register;
9046 }
9047 mutex_unlock(&devlink->lock);
9048
9049 return 0;
9050
9051 err_trap_group_register:
9052 err_trap_group_verify:
9053 for (i--; i >= 0; i--)
9054 devlink_trap_group_unregister(devlink, &groups[i]);
9055 mutex_unlock(&devlink->lock);
9056 return err;
9057 }
9058 EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
9059
9060 /**
9061 * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
9062 * @devlink: devlink.
9063 * @groups: Packet trap groups.
9064 * @groups_count: Count of provided packet trap groups.
9065 */
9066 void devlink_trap_groups_unregister(struct devlink *devlink,
9067 const struct devlink_trap_group *groups,
9068 size_t groups_count)
9069 {
9070 int i;
9071
9072 mutex_lock(&devlink->lock);
9073 for (i = groups_count - 1; i >= 0; i--)
9074 devlink_trap_group_unregister(devlink, &groups[i]);
9075 mutex_unlock(&devlink->lock);
9076 }
9077 EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
9078
9079 static void
9080 devlink_trap_policer_notify(struct devlink *devlink,
9081 const struct devlink_trap_policer_item *policer_item,
9082 enum devlink_command cmd)
9083 {
9084 struct sk_buff *msg;
9085 int err;
9086
9087 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
9088 cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
9089
9090 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9091 if (!msg)
9092 return;
9093
9094 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
9095 0, 0);
9096 if (err) {
9097 nlmsg_free(msg);
9098 return;
9099 }
9100
9101 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
9102 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
9103 }
9104
9105 static int
9106 devlink_trap_policer_register(struct devlink *devlink,
9107 const struct devlink_trap_policer *policer)
9108 {
9109 struct devlink_trap_policer_item *policer_item;
9110 int err;
9111
9112 if (devlink_trap_policer_item_lookup(devlink, policer->id))
9113 return -EEXIST;
9114
9115 policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
9116 if (!policer_item)
9117 return -ENOMEM;
9118
9119 policer_item->policer = policer;
9120 policer_item->rate = policer->init_rate;
9121 policer_item->burst = policer->init_burst;
9122
9123 if (devlink->ops->trap_policer_init) {
9124 err = devlink->ops->trap_policer_init(devlink, policer);
9125 if (err)
9126 goto err_policer_init;
9127 }
9128
9129 list_add_tail(&policer_item->list, &devlink->trap_policer_list);
9130 devlink_trap_policer_notify(devlink, policer_item,
9131 DEVLINK_CMD_TRAP_POLICER_NEW);
9132
9133 return 0;
9134
9135 err_policer_init:
9136 kfree(policer_item);
9137 return err;
9138 }
9139
9140 static void
9141 devlink_trap_policer_unregister(struct devlink *devlink,
9142 const struct devlink_trap_policer *policer)
9143 {
9144 struct devlink_trap_policer_item *policer_item;
9145
9146 policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
9147 if (WARN_ON_ONCE(!policer_item))
9148 return;
9149
9150 devlink_trap_policer_notify(devlink, policer_item,
9151 DEVLINK_CMD_TRAP_POLICER_DEL);
9152 list_del(&policer_item->list);
9153 if (devlink->ops->trap_policer_fini)
9154 devlink->ops->trap_policer_fini(devlink, policer);
9155 kfree(policer_item);
9156 }
9157
9158 /**
9159 * devlink_trap_policers_register - Register packet trap policers with devlink.
9160 * @devlink: devlink.
9161 * @policers: Packet trap policers.
9162 * @policers_count: Count of provided packet trap policers.
9163 *
9164 * Return: Non-zero value on failure.
9165 */
9166 int
9167 devlink_trap_policers_register(struct devlink *devlink,
9168 const struct devlink_trap_policer *policers,
9169 size_t policers_count)
9170 {
9171 int i, err;
9172
9173 mutex_lock(&devlink->lock);
9174 for (i = 0; i < policers_count; i++) {
9175 const struct devlink_trap_policer *policer = &policers[i];
9176
9177 if (WARN_ON(policer->id == 0 ||
9178 policer->max_rate < policer->min_rate ||
9179 policer->max_burst < policer->min_burst)) {
9180 err = -EINVAL;
9181 goto err_trap_policer_verify;
9182 }
9183
9184 err = devlink_trap_policer_register(devlink, policer);
9185 if (err)
9186 goto err_trap_policer_register;
9187 }
9188 mutex_unlock(&devlink->lock);
9189
9190 return 0;
9191
9192 err_trap_policer_register:
9193 err_trap_policer_verify:
9194 for (i--; i >= 0; i--)
9195 devlink_trap_policer_unregister(devlink, &policers[i]);
9196 mutex_unlock(&devlink->lock);
9197 return err;
9198 }
9199 EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
9200
9201 /**
9202 * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
9203 * @devlink: devlink.
9204 * @policers: Packet trap policers.
9205 * @policers_count: Count of provided packet trap policers.
9206 */
9207 void
9208 devlink_trap_policers_unregister(struct devlink *devlink,
9209 const struct devlink_trap_policer *policers,
9210 size_t policers_count)
9211 {
9212 int i;
9213
9214 mutex_lock(&devlink->lock);
9215 for (i = policers_count - 1; i >= 0; i--)
9216 devlink_trap_policer_unregister(devlink, &policers[i]);
9217 mutex_unlock(&devlink->lock);
9218 }
9219 EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
9220
9221 static void __devlink_compat_running_version(struct devlink *devlink,
9222 char *buf, size_t len)
9223 {
9224 const struct nlattr *nlattr;
9225 struct devlink_info_req req;
9226 struct sk_buff *msg;
9227 int rem, err;
9228
9229 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9230 if (!msg)
9231 return;
9232
9233 req.msg = msg;
9234 err = devlink->ops->info_get(devlink, &req, NULL);
9235 if (err)
9236 goto free_msg;
9237
9238 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
9239 const struct nlattr *kv;
9240 int rem_kv;
9241
9242 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
9243 continue;
9244
9245 nla_for_each_nested(kv, nlattr, rem_kv) {
9246 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
9247 continue;
9248
9249 strlcat(buf, nla_data(kv), len);
9250 strlcat(buf, " ", len);
9251 }
9252 }
9253 free_msg:
9254 nlmsg_free(msg);
9255 }
9256
9257 void devlink_compat_running_version(struct net_device *dev,
9258 char *buf, size_t len)
9259 {
9260 struct devlink *devlink;
9261
9262 dev_hold(dev);
9263 rtnl_unlock();
9264
9265 devlink = netdev_to_devlink(dev);
9266 if (!devlink || !devlink->ops->info_get)
9267 goto out;
9268
9269 mutex_lock(&devlink->lock);
9270 __devlink_compat_running_version(devlink, buf, len);
9271 mutex_unlock(&devlink->lock);
9272
9273 out:
9274 rtnl_lock();
9275 dev_put(dev);
9276 }
9277
9278 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
9279 {
9280 struct devlink *devlink;
9281 int ret;
9282
9283 dev_hold(dev);
9284 rtnl_unlock();
9285
9286 devlink = netdev_to_devlink(dev);
9287 if (!devlink || !devlink->ops->flash_update) {
9288 ret = -EOPNOTSUPP;
9289 goto out;
9290 }
9291
9292 mutex_lock(&devlink->lock);
9293 ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
9294 mutex_unlock(&devlink->lock);
9295
9296 out:
9297 rtnl_lock();
9298 dev_put(dev);
9299
9300 return ret;
9301 }
9302
9303 int devlink_compat_phys_port_name_get(struct net_device *dev,
9304 char *name, size_t len)
9305 {
9306 struct devlink_port *devlink_port;
9307
9308 /* RTNL mutex is held here which ensures that devlink_port
9309 * instance cannot disappear in the middle. No need to take
9310 * any devlink lock as only permanent values are accessed.
9311 */
9312 ASSERT_RTNL();
9313
9314 devlink_port = netdev_to_devlink_port(dev);
9315 if (!devlink_port)
9316 return -EOPNOTSUPP;
9317
9318 return __devlink_port_phys_port_name_get(devlink_port, name, len);
9319 }
9320
9321 int devlink_compat_switch_id_get(struct net_device *dev,
9322 struct netdev_phys_item_id *ppid)
9323 {
9324 struct devlink_port *devlink_port;
9325
9326 /* Caller must hold RTNL mutex or reference to dev, which ensures that
9327 * devlink_port instance cannot disappear in the middle. No need to take
9328 * any devlink lock as only permanent values are accessed.
9329 */
9330 devlink_port = netdev_to_devlink_port(dev);
9331 if (!devlink_port || !devlink_port->attrs.switch_port)
9332 return -EOPNOTSUPP;
9333
9334 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
9335
9336 return 0;
9337 }
9338
9339 static void __net_exit devlink_pernet_pre_exit(struct net *net)
9340 {
9341 struct devlink *devlink;
9342 int err;
9343
9344 /* In case network namespace is getting destroyed, reload
9345 * all devlink instances from this namespace into init_net.
9346 */
9347 mutex_lock(&devlink_mutex);
9348 list_for_each_entry(devlink, &devlink_list, list) {
9349 if (net_eq(devlink_net(devlink), net)) {
9350 if (WARN_ON(!devlink_reload_supported(devlink)))
9351 continue;
9352 err = devlink_reload(devlink, &init_net, NULL);
9353 if (err && err != -EOPNOTSUPP)
9354 pr_warn("Failed to reload devlink instance into init_net\n");
9355 }
9356 }
9357 mutex_unlock(&devlink_mutex);
9358 }
9359
9360 static struct pernet_operations devlink_pernet_ops __net_initdata = {
9361 .pre_exit = devlink_pernet_pre_exit,
9362 };
9363
9364 static int __init devlink_init(void)
9365 {
9366 int err;
9367
9368 err = genl_register_family(&devlink_nl_family);
9369 if (err)
9370 goto out;
9371 err = register_pernet_subsys(&devlink_pernet_ops);
9372
9373 out:
9374 WARN_ON(err);
9375 return err;
9376 }
9377
9378 subsys_initcall(devlink_init);
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