1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright Samuel Mendoza-Jonas, IBM Corporation 2018.
4 */
5
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/if_arp.h>
9 #include <linux/rtnetlink.h>
10 #include <linux/etherdevice.h>
11 #include <net/genetlink.h>
12 #include <net/ncsi.h>
13 #include <linux/skbuff.h>
14 #include <net/sock.h>
15 #include <uapi/linux/ncsi.h>
16
17 #include "internal.h"
18 #include "ncsi-pkt.h"
19 #include "ncsi-netlink.h"
20
21 static struct genl_family ncsi_genl_family;
22
23 static const struct nla_policy ncsi_genl_policy[NCSI_ATTR_MAX + 1] = {
24 [NCSI_ATTR_IFINDEX] = { .type = NLA_U32 },
25 [NCSI_ATTR_PACKAGE_LIST] = { .type = NLA_NESTED },
26 [NCSI_ATTR_PACKAGE_ID] = { .type = NLA_U32 },
27 [NCSI_ATTR_CHANNEL_ID] = { .type = NLA_U32 },
28 [NCSI_ATTR_DATA] = { .type = NLA_BINARY, .len = 2048 },
29 [NCSI_ATTR_MULTI_FLAG] = { .type = NLA_FLAG },
30 [NCSI_ATTR_PACKAGE_MASK] = { .type = NLA_U32 },
31 [NCSI_ATTR_CHANNEL_MASK] = { .type = NLA_U32 },
32 };
33
ndp_from_ifindex(struct net * net,u32 ifindex)34 static struct ncsi_dev_priv *ndp_from_ifindex(struct net *net, u32 ifindex)
35 {
36 struct ncsi_dev_priv *ndp;
37 struct net_device *dev;
38 struct ncsi_dev *nd;
39 struct ncsi_dev;
40
41 if (!net)
42 return NULL;
43
44 dev = dev_get_by_index(net, ifindex);
45 if (!dev) {
46 pr_err("NCSI netlink: No device for ifindex %u\n", ifindex);
47 return NULL;
48 }
49
50 nd = ncsi_find_dev(dev);
51 ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
52
53 dev_put(dev);
54 return ndp;
55 }
56
ncsi_write_channel_info(struct sk_buff * skb,struct ncsi_dev_priv * ndp,struct ncsi_channel * nc)57 static int ncsi_write_channel_info(struct sk_buff *skb,
58 struct ncsi_dev_priv *ndp,
59 struct ncsi_channel *nc)
60 {
61 struct ncsi_channel_vlan_filter *ncf;
62 struct ncsi_channel_mode *m;
63 struct nlattr *vid_nest;
64 int i;
65
66 nla_put_u32(skb, NCSI_CHANNEL_ATTR_ID, nc->id);
67 m = &nc->modes[NCSI_MODE_LINK];
68 nla_put_u32(skb, NCSI_CHANNEL_ATTR_LINK_STATE, m->data[2]);
69 if (nc->state == NCSI_CHANNEL_ACTIVE)
70 nla_put_flag(skb, NCSI_CHANNEL_ATTR_ACTIVE);
71 if (nc == nc->package->preferred_channel)
72 nla_put_flag(skb, NCSI_CHANNEL_ATTR_FORCED);
73
74 nla_put_u32(skb, NCSI_CHANNEL_ATTR_VERSION_MAJOR, nc->version.major);
75 nla_put_u32(skb, NCSI_CHANNEL_ATTR_VERSION_MINOR, nc->version.minor);
76 nla_put_string(skb, NCSI_CHANNEL_ATTR_VERSION_STR, nc->version.fw_name);
77
78 vid_nest = nla_nest_start_noflag(skb, NCSI_CHANNEL_ATTR_VLAN_LIST);
79 if (!vid_nest)
80 return -ENOMEM;
81 ncf = &nc->vlan_filter;
82 i = -1;
83 while ((i = find_next_bit((void *)&ncf->bitmap, ncf->n_vids,
84 i + 1)) < ncf->n_vids) {
85 if (ncf->vids[i])
86 nla_put_u16(skb, NCSI_CHANNEL_ATTR_VLAN_ID,
87 ncf->vids[i]);
88 }
89 nla_nest_end(skb, vid_nest);
90
91 return 0;
92 }
93
ncsi_write_package_info(struct sk_buff * skb,struct ncsi_dev_priv * ndp,unsigned int id)94 static int ncsi_write_package_info(struct sk_buff *skb,
95 struct ncsi_dev_priv *ndp, unsigned int id)
96 {
97 struct nlattr *pnest, *cnest, *nest;
98 struct ncsi_package *np;
99 struct ncsi_channel *nc;
100 bool found;
101 int rc;
102
103 if (id > ndp->package_num - 1) {
104 netdev_info(ndp->ndev.dev, "NCSI: No package with id %u\n", id);
105 return -ENODEV;
106 }
107
108 found = false;
109 NCSI_FOR_EACH_PACKAGE(ndp, np) {
110 if (np->id != id)
111 continue;
112 pnest = nla_nest_start_noflag(skb, NCSI_PKG_ATTR);
113 if (!pnest)
114 return -ENOMEM;
115 rc = nla_put_u32(skb, NCSI_PKG_ATTR_ID, np->id);
116 if (rc) {
117 nla_nest_cancel(skb, pnest);
118 return rc;
119 }
120 if ((0x1 << np->id) == ndp->package_whitelist)
121 nla_put_flag(skb, NCSI_PKG_ATTR_FORCED);
122 cnest = nla_nest_start_noflag(skb, NCSI_PKG_ATTR_CHANNEL_LIST);
123 if (!cnest) {
124 nla_nest_cancel(skb, pnest);
125 return -ENOMEM;
126 }
127 NCSI_FOR_EACH_CHANNEL(np, nc) {
128 nest = nla_nest_start_noflag(skb, NCSI_CHANNEL_ATTR);
129 if (!nest) {
130 nla_nest_cancel(skb, cnest);
131 nla_nest_cancel(skb, pnest);
132 return -ENOMEM;
133 }
134 rc = ncsi_write_channel_info(skb, ndp, nc);
135 if (rc) {
136 nla_nest_cancel(skb, nest);
137 nla_nest_cancel(skb, cnest);
138 nla_nest_cancel(skb, pnest);
139 return rc;
140 }
141 nla_nest_end(skb, nest);
142 }
143 nla_nest_end(skb, cnest);
144 nla_nest_end(skb, pnest);
145 found = true;
146 }
147
148 if (!found)
149 return -ENODEV;
150
151 return 0;
152 }
153
ncsi_pkg_info_nl(struct sk_buff * msg,struct genl_info * info)154 static int ncsi_pkg_info_nl(struct sk_buff *msg, struct genl_info *info)
155 {
156 struct ncsi_dev_priv *ndp;
157 unsigned int package_id;
158 struct sk_buff *skb;
159 struct nlattr *attr;
160 void *hdr;
161 int rc;
162
163 if (!info || !info->attrs)
164 return -EINVAL;
165
166 if (!info->attrs[NCSI_ATTR_IFINDEX])
167 return -EINVAL;
168
169 if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
170 return -EINVAL;
171
172 ndp = ndp_from_ifindex(genl_info_net(info),
173 nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
174 if (!ndp)
175 return -ENODEV;
176
177 skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
178 if (!skb)
179 return -ENOMEM;
180
181 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
182 &ncsi_genl_family, 0, NCSI_CMD_PKG_INFO);
183 if (!hdr) {
184 kfree_skb(skb);
185 return -EMSGSIZE;
186 }
187
188 package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
189
190 attr = nla_nest_start_noflag(skb, NCSI_ATTR_PACKAGE_LIST);
191 if (!attr) {
192 kfree_skb(skb);
193 return -EMSGSIZE;
194 }
195 rc = ncsi_write_package_info(skb, ndp, package_id);
196
197 if (rc) {
198 nla_nest_cancel(skb, attr);
199 goto err;
200 }
201
202 nla_nest_end(skb, attr);
203
204 genlmsg_end(skb, hdr);
205 return genlmsg_reply(skb, info);
206
207 err:
208 kfree_skb(skb);
209 return rc;
210 }
211
ncsi_pkg_info_all_nl(struct sk_buff * skb,struct netlink_callback * cb)212 static int ncsi_pkg_info_all_nl(struct sk_buff *skb,
213 struct netlink_callback *cb)
214 {
215 struct nlattr *attrs[NCSI_ATTR_MAX + 1];
216 struct ncsi_package *np, *package;
217 struct ncsi_dev_priv *ndp;
218 unsigned int package_id;
219 struct nlattr *attr;
220 void *hdr;
221 int rc;
222
223 rc = genlmsg_parse_deprecated(cb->nlh, &ncsi_genl_family, attrs, NCSI_ATTR_MAX,
224 ncsi_genl_policy, NULL);
225 if (rc)
226 return rc;
227
228 if (!attrs[NCSI_ATTR_IFINDEX])
229 return -EINVAL;
230
231 ndp = ndp_from_ifindex(get_net(sock_net(skb->sk)),
232 nla_get_u32(attrs[NCSI_ATTR_IFINDEX]));
233
234 if (!ndp)
235 return -ENODEV;
236
237 package_id = cb->args[0];
238 package = NULL;
239 NCSI_FOR_EACH_PACKAGE(ndp, np)
240 if (np->id == package_id)
241 package = np;
242
243 if (!package)
244 return 0; /* done */
245
246 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
247 &ncsi_genl_family, NLM_F_MULTI, NCSI_CMD_PKG_INFO);
248 if (!hdr) {
249 rc = -EMSGSIZE;
250 goto err;
251 }
252
253 attr = nla_nest_start_noflag(skb, NCSI_ATTR_PACKAGE_LIST);
254 if (!attr) {
255 rc = -EMSGSIZE;
256 goto err;
257 }
258 rc = ncsi_write_package_info(skb, ndp, package->id);
259 if (rc) {
260 nla_nest_cancel(skb, attr);
261 goto err;
262 }
263
264 nla_nest_end(skb, attr);
265 genlmsg_end(skb, hdr);
266
267 cb->args[0] = package_id + 1;
268
269 return skb->len;
270 err:
271 genlmsg_cancel(skb, hdr);
272 return rc;
273 }
274
ncsi_set_interface_nl(struct sk_buff * msg,struct genl_info * info)275 static int ncsi_set_interface_nl(struct sk_buff *msg, struct genl_info *info)
276 {
277 struct ncsi_package *np, *package;
278 struct ncsi_channel *nc, *channel;
279 u32 package_id, channel_id;
280 struct ncsi_dev_priv *ndp;
281 unsigned long flags;
282
283 if (!info || !info->attrs)
284 return -EINVAL;
285
286 if (!info->attrs[NCSI_ATTR_IFINDEX])
287 return -EINVAL;
288
289 if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
290 return -EINVAL;
291
292 ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
293 nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
294 if (!ndp)
295 return -ENODEV;
296
297 package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
298 package = NULL;
299
300 NCSI_FOR_EACH_PACKAGE(ndp, np)
301 if (np->id == package_id)
302 package = np;
303 if (!package) {
304 /* The user has set a package that does not exist */
305 return -ERANGE;
306 }
307
308 channel = NULL;
309 if (info->attrs[NCSI_ATTR_CHANNEL_ID]) {
310 channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
311 NCSI_FOR_EACH_CHANNEL(package, nc)
312 if (nc->id == channel_id) {
313 channel = nc;
314 break;
315 }
316 if (!channel) {
317 netdev_info(ndp->ndev.dev,
318 "NCSI: Channel %u does not exist!\n",
319 channel_id);
320 return -ERANGE;
321 }
322 }
323
324 spin_lock_irqsave(&ndp->lock, flags);
325 ndp->package_whitelist = 0x1 << package->id;
326 ndp->multi_package = false;
327 spin_unlock_irqrestore(&ndp->lock, flags);
328
329 spin_lock_irqsave(&package->lock, flags);
330 package->multi_channel = false;
331 if (channel) {
332 package->channel_whitelist = 0x1 << channel->id;
333 package->preferred_channel = channel;
334 } else {
335 /* Allow any channel */
336 package->channel_whitelist = UINT_MAX;
337 package->preferred_channel = NULL;
338 }
339 spin_unlock_irqrestore(&package->lock, flags);
340
341 if (channel)
342 netdev_info(ndp->ndev.dev,
343 "Set package 0x%x, channel 0x%x as preferred\n",
344 package_id, channel_id);
345 else
346 netdev_info(ndp->ndev.dev, "Set package 0x%x as preferred\n",
347 package_id);
348
349 /* Update channel configuration */
350 if (!(ndp->flags & NCSI_DEV_RESET))
351 ncsi_reset_dev(&ndp->ndev);
352
353 return 0;
354 }
355
ncsi_clear_interface_nl(struct sk_buff * msg,struct genl_info * info)356 static int ncsi_clear_interface_nl(struct sk_buff *msg, struct genl_info *info)
357 {
358 struct ncsi_dev_priv *ndp;
359 struct ncsi_package *np;
360 unsigned long flags;
361
362 if (!info || !info->attrs)
363 return -EINVAL;
364
365 if (!info->attrs[NCSI_ATTR_IFINDEX])
366 return -EINVAL;
367
368 ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
369 nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
370 if (!ndp)
371 return -ENODEV;
372
373 /* Reset any whitelists and disable multi mode */
374 spin_lock_irqsave(&ndp->lock, flags);
375 ndp->package_whitelist = UINT_MAX;
376 ndp->multi_package = false;
377 spin_unlock_irqrestore(&ndp->lock, flags);
378
379 NCSI_FOR_EACH_PACKAGE(ndp, np) {
380 spin_lock_irqsave(&np->lock, flags);
381 np->multi_channel = false;
382 np->channel_whitelist = UINT_MAX;
383 np->preferred_channel = NULL;
384 spin_unlock_irqrestore(&np->lock, flags);
385 }
386 netdev_info(ndp->ndev.dev, "NCSI: Cleared preferred package/channel\n");
387
388 /* Update channel configuration */
389 if (!(ndp->flags & NCSI_DEV_RESET))
390 ncsi_reset_dev(&ndp->ndev);
391
392 return 0;
393 }
394
ncsi_send_cmd_nl(struct sk_buff * msg,struct genl_info * info)395 static int ncsi_send_cmd_nl(struct sk_buff *msg, struct genl_info *info)
396 {
397 struct ncsi_dev_priv *ndp;
398 struct ncsi_pkt_hdr *hdr;
399 struct ncsi_cmd_arg nca;
400 unsigned char *data;
401 u32 package_id;
402 u32 channel_id;
403 int len, ret;
404
405 if (!info || !info->attrs) {
406 ret = -EINVAL;
407 goto out;
408 }
409
410 if (!info->attrs[NCSI_ATTR_IFINDEX]) {
411 ret = -EINVAL;
412 goto out;
413 }
414
415 if (!info->attrs[NCSI_ATTR_PACKAGE_ID]) {
416 ret = -EINVAL;
417 goto out;
418 }
419
420 if (!info->attrs[NCSI_ATTR_CHANNEL_ID]) {
421 ret = -EINVAL;
422 goto out;
423 }
424
425 if (!info->attrs[NCSI_ATTR_DATA]) {
426 ret = -EINVAL;
427 goto out;
428 }
429
430 ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
431 nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
432 if (!ndp) {
433 ret = -ENODEV;
434 goto out;
435 }
436
437 package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
438 channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
439
440 if (package_id >= NCSI_MAX_PACKAGE || channel_id >= NCSI_MAX_CHANNEL) {
441 ret = -ERANGE;
442 goto out_netlink;
443 }
444
445 len = nla_len(info->attrs[NCSI_ATTR_DATA]);
446 if (len < sizeof(struct ncsi_pkt_hdr)) {
447 netdev_info(ndp->ndev.dev, "NCSI: no command to send %u\n",
448 package_id);
449 ret = -EINVAL;
450 goto out_netlink;
451 } else {
452 data = (unsigned char *)nla_data(info->attrs[NCSI_ATTR_DATA]);
453 }
454
455 hdr = (struct ncsi_pkt_hdr *)data;
456
457 nca.ndp = ndp;
458 nca.package = (unsigned char)package_id;
459 nca.channel = (unsigned char)channel_id;
460 nca.type = hdr->type;
461 nca.req_flags = NCSI_REQ_FLAG_NETLINK_DRIVEN;
462 nca.info = info;
463 nca.payload = ntohs(hdr->length);
464 nca.data = data + sizeof(*hdr);
465
466 ret = ncsi_xmit_cmd(&nca);
467 out_netlink:
468 if (ret != 0) {
469 netdev_err(ndp->ndev.dev,
470 "NCSI: Error %d sending command\n",
471 ret);
472 ncsi_send_netlink_err(ndp->ndev.dev,
473 info->snd_seq,
474 info->snd_portid,
475 info->nlhdr,
476 ret);
477 }
478 out:
479 return ret;
480 }
481
ncsi_send_netlink_rsp(struct ncsi_request * nr,struct ncsi_package * np,struct ncsi_channel * nc)482 int ncsi_send_netlink_rsp(struct ncsi_request *nr,
483 struct ncsi_package *np,
484 struct ncsi_channel *nc)
485 {
486 struct sk_buff *skb;
487 struct net *net;
488 void *hdr;
489 int rc;
490
491 net = dev_net(nr->rsp->dev);
492
493 skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
494 if (!skb)
495 return -ENOMEM;
496
497 hdr = genlmsg_put(skb, nr->snd_portid, nr->snd_seq,
498 &ncsi_genl_family, 0, NCSI_CMD_SEND_CMD);
499 if (!hdr) {
500 kfree_skb(skb);
501 return -EMSGSIZE;
502 }
503
504 nla_put_u32(skb, NCSI_ATTR_IFINDEX, nr->rsp->dev->ifindex);
505 if (np)
506 nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID, np->id);
507 if (nc)
508 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, nc->id);
509 else
510 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, NCSI_RESERVED_CHANNEL);
511
512 rc = nla_put(skb, NCSI_ATTR_DATA, nr->rsp->len, (void *)nr->rsp->data);
513 if (rc)
514 goto err;
515
516 genlmsg_end(skb, hdr);
517 return genlmsg_unicast(net, skb, nr->snd_portid);
518
519 err:
520 kfree_skb(skb);
521 return rc;
522 }
523
ncsi_send_netlink_timeout(struct ncsi_request * nr,struct ncsi_package * np,struct ncsi_channel * nc)524 int ncsi_send_netlink_timeout(struct ncsi_request *nr,
525 struct ncsi_package *np,
526 struct ncsi_channel *nc)
527 {
528 struct sk_buff *skb;
529 struct net *net;
530 void *hdr;
531
532 skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
533 if (!skb)
534 return -ENOMEM;
535
536 hdr = genlmsg_put(skb, nr->snd_portid, nr->snd_seq,
537 &ncsi_genl_family, 0, NCSI_CMD_SEND_CMD);
538 if (!hdr) {
539 kfree_skb(skb);
540 return -EMSGSIZE;
541 }
542
543 net = dev_net(nr->cmd->dev);
544
545 nla_put_u32(skb, NCSI_ATTR_IFINDEX, nr->cmd->dev->ifindex);
546
547 if (np)
548 nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID, np->id);
549 else
550 nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID,
551 NCSI_PACKAGE_INDEX((((struct ncsi_pkt_hdr *)
552 nr->cmd->data)->channel)));
553
554 if (nc)
555 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, nc->id);
556 else
557 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, NCSI_RESERVED_CHANNEL);
558
559 genlmsg_end(skb, hdr);
560 return genlmsg_unicast(net, skb, nr->snd_portid);
561 }
562
ncsi_send_netlink_err(struct net_device * dev,u32 snd_seq,u32 snd_portid,const struct nlmsghdr * nlhdr,int err)563 int ncsi_send_netlink_err(struct net_device *dev,
564 u32 snd_seq,
565 u32 snd_portid,
566 const struct nlmsghdr *nlhdr,
567 int err)
568 {
569 struct nlmsghdr *nlh;
570 struct nlmsgerr *nle;
571 struct sk_buff *skb;
572 struct net *net;
573
574 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
575 if (!skb)
576 return -ENOMEM;
577
578 net = dev_net(dev);
579
580 nlh = nlmsg_put(skb, snd_portid, snd_seq,
581 NLMSG_ERROR, sizeof(*nle), 0);
582 nle = (struct nlmsgerr *)nlmsg_data(nlh);
583 nle->error = err;
584 memcpy(&nle->msg, nlhdr, sizeof(*nlh));
585
586 nlmsg_end(skb, nlh);
587
588 return nlmsg_unicast(net->genl_sock, skb, snd_portid);
589 }
590
ncsi_set_package_mask_nl(struct sk_buff * msg,struct genl_info * info)591 static int ncsi_set_package_mask_nl(struct sk_buff *msg,
592 struct genl_info *info)
593 {
594 struct ncsi_dev_priv *ndp;
595 unsigned long flags;
596 int rc;
597
598 if (!info || !info->attrs)
599 return -EINVAL;
600
601 if (!info->attrs[NCSI_ATTR_IFINDEX])
602 return -EINVAL;
603
604 if (!info->attrs[NCSI_ATTR_PACKAGE_MASK])
605 return -EINVAL;
606
607 ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
608 nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
609 if (!ndp)
610 return -ENODEV;
611
612 spin_lock_irqsave(&ndp->lock, flags);
613 if (nla_get_flag(info->attrs[NCSI_ATTR_MULTI_FLAG])) {
614 if (ndp->flags & NCSI_DEV_HWA) {
615 ndp->multi_package = true;
616 rc = 0;
617 } else {
618 netdev_err(ndp->ndev.dev,
619 "NCSI: Can't use multiple packages without HWA\n");
620 rc = -EPERM;
621 }
622 } else {
623 ndp->multi_package = false;
624 rc = 0;
625 }
626
627 if (!rc)
628 ndp->package_whitelist =
629 nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_MASK]);
630 spin_unlock_irqrestore(&ndp->lock, flags);
631
632 if (!rc) {
633 /* Update channel configuration */
634 if (!(ndp->flags & NCSI_DEV_RESET))
635 ncsi_reset_dev(&ndp->ndev);
636 }
637
638 return rc;
639 }
640
ncsi_set_channel_mask_nl(struct sk_buff * msg,struct genl_info * info)641 static int ncsi_set_channel_mask_nl(struct sk_buff *msg,
642 struct genl_info *info)
643 {
644 struct ncsi_package *np, *package;
645 struct ncsi_channel *nc, *channel;
646 u32 package_id, channel_id;
647 struct ncsi_dev_priv *ndp;
648 unsigned long flags;
649
650 if (!info || !info->attrs)
651 return -EINVAL;
652
653 if (!info->attrs[NCSI_ATTR_IFINDEX])
654 return -EINVAL;
655
656 if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
657 return -EINVAL;
658
659 if (!info->attrs[NCSI_ATTR_CHANNEL_MASK])
660 return -EINVAL;
661
662 ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
663 nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
664 if (!ndp)
665 return -ENODEV;
666
667 package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
668 package = NULL;
669 NCSI_FOR_EACH_PACKAGE(ndp, np)
670 if (np->id == package_id) {
671 package = np;
672 break;
673 }
674 if (!package)
675 return -ERANGE;
676
677 spin_lock_irqsave(&package->lock, flags);
678
679 channel = NULL;
680 if (info->attrs[NCSI_ATTR_CHANNEL_ID]) {
681 channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
682 NCSI_FOR_EACH_CHANNEL(np, nc)
683 if (nc->id == channel_id) {
684 channel = nc;
685 break;
686 }
687 if (!channel) {
688 spin_unlock_irqrestore(&package->lock, flags);
689 return -ERANGE;
690 }
691 netdev_dbg(ndp->ndev.dev,
692 "NCSI: Channel %u set as preferred channel\n",
693 channel->id);
694 }
695
696 package->channel_whitelist =
697 nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_MASK]);
698 if (package->channel_whitelist == 0)
699 netdev_dbg(ndp->ndev.dev,
700 "NCSI: Package %u set to all channels disabled\n",
701 package->id);
702
703 package->preferred_channel = channel;
704
705 if (nla_get_flag(info->attrs[NCSI_ATTR_MULTI_FLAG])) {
706 package->multi_channel = true;
707 netdev_info(ndp->ndev.dev,
708 "NCSI: Multi-channel enabled on package %u\n",
709 package_id);
710 } else {
711 package->multi_channel = false;
712 }
713
714 spin_unlock_irqrestore(&package->lock, flags);
715
716 /* Update channel configuration */
717 if (!(ndp->flags & NCSI_DEV_RESET))
718 ncsi_reset_dev(&ndp->ndev);
719
720 return 0;
721 }
722
723 static const struct genl_small_ops ncsi_ops[] = {
724 {
725 .cmd = NCSI_CMD_PKG_INFO,
726 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
727 .doit = ncsi_pkg_info_nl,
728 .dumpit = ncsi_pkg_info_all_nl,
729 .flags = 0,
730 },
731 {
732 .cmd = NCSI_CMD_SET_INTERFACE,
733 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
734 .doit = ncsi_set_interface_nl,
735 .flags = GENL_ADMIN_PERM,
736 },
737 {
738 .cmd = NCSI_CMD_CLEAR_INTERFACE,
739 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
740 .doit = ncsi_clear_interface_nl,
741 .flags = GENL_ADMIN_PERM,
742 },
743 {
744 .cmd = NCSI_CMD_SEND_CMD,
745 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
746 .doit = ncsi_send_cmd_nl,
747 .flags = GENL_ADMIN_PERM,
748 },
749 {
750 .cmd = NCSI_CMD_SET_PACKAGE_MASK,
751 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
752 .doit = ncsi_set_package_mask_nl,
753 .flags = GENL_ADMIN_PERM,
754 },
755 {
756 .cmd = NCSI_CMD_SET_CHANNEL_MASK,
757 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
758 .doit = ncsi_set_channel_mask_nl,
759 .flags = GENL_ADMIN_PERM,
760 },
761 };
762
763 static struct genl_family ncsi_genl_family __ro_after_init = {
764 .name = "NCSI",
765 .version = 0,
766 .maxattr = NCSI_ATTR_MAX,
767 .policy = ncsi_genl_policy,
768 .module = THIS_MODULE,
769 .small_ops = ncsi_ops,
770 .n_small_ops = ARRAY_SIZE(ncsi_ops),
771 .resv_start_op = NCSI_CMD_SET_CHANNEL_MASK + 1,
772 };
773
ncsi_init_netlink(void)774 static int __init ncsi_init_netlink(void)
775 {
776 return genl_register_family(&ncsi_genl_family);
777 }
778 subsys_initcall(ncsi_init_netlink);
779