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bfcd3a46 JP |
1 | /* |
2 | * net/core/devlink.c - Network physical/parent device Netlink interface | |
3 | * | |
4 | * Heavily inspired by net/wireless/ | |
5 | * Copyright (c) 2016 Mellanox Technologies. All rights reserved. | |
6 | * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/gfp.h> | |
19 | #include <linux/device.h> | |
20 | #include <linux/list.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <rdma/ib_verbs.h> | |
23 | #include <net/netlink.h> | |
24 | #include <net/genetlink.h> | |
25 | #include <net/rtnetlink.h> | |
26 | #include <net/net_namespace.h> | |
27 | #include <net/sock.h> | |
28 | #include <net/devlink.h> | |
29 | ||
30 | static LIST_HEAD(devlink_list); | |
31 | ||
32 | /* devlink_mutex | |
33 | * | |
34 | * An overall lock guarding every operation coming from userspace. | |
35 | * It also guards devlink devices list and it is taken when | |
36 | * driver registers/unregisters it. | |
37 | */ | |
38 | static DEFINE_MUTEX(devlink_mutex); | |
39 | ||
40 | /* devlink_port_mutex | |
41 | * | |
42 | * Shared lock to guard lists of ports in all devlink devices. | |
43 | */ | |
44 | static DEFINE_MUTEX(devlink_port_mutex); | |
45 | ||
46 | static struct net *devlink_net(const struct devlink *devlink) | |
47 | { | |
48 | return read_pnet(&devlink->_net); | |
49 | } | |
50 | ||
51 | static void devlink_net_set(struct devlink *devlink, struct net *net) | |
52 | { | |
53 | write_pnet(&devlink->_net, net); | |
54 | } | |
55 | ||
56 | static struct devlink *devlink_get_from_attrs(struct net *net, | |
57 | struct nlattr **attrs) | |
58 | { | |
59 | struct devlink *devlink; | |
60 | char *busname; | |
61 | char *devname; | |
62 | ||
63 | if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME]) | |
64 | return ERR_PTR(-EINVAL); | |
65 | ||
66 | busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]); | |
67 | devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]); | |
68 | ||
69 | list_for_each_entry(devlink, &devlink_list, list) { | |
70 | if (strcmp(devlink->dev->bus->name, busname) == 0 && | |
71 | strcmp(dev_name(devlink->dev), devname) == 0 && | |
72 | net_eq(devlink_net(devlink), net)) | |
73 | return devlink; | |
74 | } | |
75 | ||
76 | return ERR_PTR(-ENODEV); | |
77 | } | |
78 | ||
79 | static struct devlink *devlink_get_from_info(struct genl_info *info) | |
80 | { | |
81 | return devlink_get_from_attrs(genl_info_net(info), info->attrs); | |
82 | } | |
83 | ||
84 | static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, | |
85 | int port_index) | |
86 | { | |
87 | struct devlink_port *devlink_port; | |
88 | ||
89 | list_for_each_entry(devlink_port, &devlink->port_list, list) { | |
90 | if (devlink_port->index == port_index) | |
91 | return devlink_port; | |
92 | } | |
93 | return NULL; | |
94 | } | |
95 | ||
96 | static bool devlink_port_index_exists(struct devlink *devlink, int port_index) | |
97 | { | |
98 | return devlink_port_get_by_index(devlink, port_index); | |
99 | } | |
100 | ||
101 | static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, | |
102 | struct nlattr **attrs) | |
103 | { | |
104 | if (attrs[DEVLINK_ATTR_PORT_INDEX]) { | |
105 | u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); | |
106 | struct devlink_port *devlink_port; | |
107 | ||
108 | devlink_port = devlink_port_get_by_index(devlink, port_index); | |
109 | if (!devlink_port) | |
110 | return ERR_PTR(-ENODEV); | |
111 | return devlink_port; | |
112 | } | |
113 | return ERR_PTR(-EINVAL); | |
114 | } | |
115 | ||
116 | static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, | |
117 | struct genl_info *info) | |
118 | { | |
119 | return devlink_port_get_from_attrs(devlink, info->attrs); | |
120 | } | |
121 | ||
122 | #define DEVLINK_NL_FLAG_NEED_PORT BIT(0) | |
123 | ||
124 | static int devlink_nl_pre_doit(const struct genl_ops *ops, | |
125 | struct sk_buff *skb, struct genl_info *info) | |
126 | { | |
127 | struct devlink *devlink; | |
128 | ||
129 | mutex_lock(&devlink_mutex); | |
130 | devlink = devlink_get_from_info(info); | |
131 | if (IS_ERR(devlink)) { | |
132 | mutex_unlock(&devlink_mutex); | |
133 | return PTR_ERR(devlink); | |
134 | } | |
135 | info->user_ptr[0] = devlink; | |
136 | if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) { | |
137 | struct devlink_port *devlink_port; | |
138 | ||
139 | mutex_lock(&devlink_port_mutex); | |
140 | devlink_port = devlink_port_get_from_info(devlink, info); | |
141 | if (IS_ERR(devlink_port)) { | |
142 | mutex_unlock(&devlink_port_mutex); | |
143 | mutex_unlock(&devlink_mutex); | |
144 | return PTR_ERR(devlink_port); | |
145 | } | |
146 | info->user_ptr[1] = devlink_port; | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static void devlink_nl_post_doit(const struct genl_ops *ops, | |
152 | struct sk_buff *skb, struct genl_info *info) | |
153 | { | |
154 | if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) | |
155 | mutex_unlock(&devlink_port_mutex); | |
156 | mutex_unlock(&devlink_mutex); | |
157 | } | |
158 | ||
159 | static struct genl_family devlink_nl_family = { | |
160 | .id = GENL_ID_GENERATE, | |
161 | .name = DEVLINK_GENL_NAME, | |
162 | .version = DEVLINK_GENL_VERSION, | |
163 | .maxattr = DEVLINK_ATTR_MAX, | |
164 | .netnsok = true, | |
165 | .pre_doit = devlink_nl_pre_doit, | |
166 | .post_doit = devlink_nl_post_doit, | |
167 | }; | |
168 | ||
169 | enum devlink_multicast_groups { | |
170 | DEVLINK_MCGRP_CONFIG, | |
171 | }; | |
172 | ||
173 | static const struct genl_multicast_group devlink_nl_mcgrps[] = { | |
174 | [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME }, | |
175 | }; | |
176 | ||
177 | static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink) | |
178 | { | |
179 | if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name)) | |
180 | return -EMSGSIZE; | |
181 | if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev))) | |
182 | return -EMSGSIZE; | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink, | |
187 | enum devlink_command cmd, u32 portid, | |
188 | u32 seq, int flags) | |
189 | { | |
190 | void *hdr; | |
191 | ||
192 | hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); | |
193 | if (!hdr) | |
194 | return -EMSGSIZE; | |
195 | ||
196 | if (devlink_nl_put_handle(msg, devlink)) | |
197 | goto nla_put_failure; | |
198 | ||
199 | genlmsg_end(msg, hdr); | |
200 | return 0; | |
201 | ||
202 | nla_put_failure: | |
203 | genlmsg_cancel(msg, hdr); | |
204 | return -EMSGSIZE; | |
205 | } | |
206 | ||
207 | static void devlink_notify(struct devlink *devlink, enum devlink_command cmd) | |
208 | { | |
209 | struct sk_buff *msg; | |
210 | int err; | |
211 | ||
212 | WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL); | |
213 | ||
214 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
215 | if (!msg) | |
216 | return; | |
217 | ||
218 | err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0); | |
219 | if (err) { | |
220 | nlmsg_free(msg); | |
221 | return; | |
222 | } | |
223 | ||
224 | genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), | |
225 | msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); | |
226 | } | |
227 | ||
228 | static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink, | |
229 | struct devlink_port *devlink_port, | |
230 | enum devlink_command cmd, u32 portid, | |
231 | u32 seq, int flags) | |
232 | { | |
233 | void *hdr; | |
234 | ||
235 | hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); | |
236 | if (!hdr) | |
237 | return -EMSGSIZE; | |
238 | ||
239 | if (devlink_nl_put_handle(msg, devlink)) | |
240 | goto nla_put_failure; | |
241 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) | |
242 | goto nla_put_failure; | |
243 | if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) | |
244 | goto nla_put_failure; | |
245 | if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && | |
246 | nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, | |
247 | devlink_port->desired_type)) | |
248 | goto nla_put_failure; | |
249 | if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { | |
250 | struct net_device *netdev = devlink_port->type_dev; | |
251 | ||
252 | if (netdev && | |
253 | (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, | |
254 | netdev->ifindex) || | |
255 | nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, | |
256 | netdev->name))) | |
257 | goto nla_put_failure; | |
258 | } | |
259 | if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { | |
260 | struct ib_device *ibdev = devlink_port->type_dev; | |
261 | ||
262 | if (ibdev && | |
263 | nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, | |
264 | ibdev->name)) | |
265 | goto nla_put_failure; | |
266 | } | |
267 | if (devlink_port->split && | |
268 | nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, | |
269 | devlink_port->split_group)) | |
270 | goto nla_put_failure; | |
271 | ||
272 | genlmsg_end(msg, hdr); | |
273 | return 0; | |
274 | ||
275 | nla_put_failure: | |
276 | genlmsg_cancel(msg, hdr); | |
277 | return -EMSGSIZE; | |
278 | } | |
279 | ||
280 | static void devlink_port_notify(struct devlink_port *devlink_port, | |
281 | enum devlink_command cmd) | |
282 | { | |
283 | struct devlink *devlink = devlink_port->devlink; | |
284 | struct sk_buff *msg; | |
285 | int err; | |
286 | ||
287 | if (!devlink_port->registered) | |
288 | return; | |
289 | ||
290 | WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); | |
291 | ||
292 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
293 | if (!msg) | |
294 | return; | |
295 | ||
296 | err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0); | |
297 | if (err) { | |
298 | nlmsg_free(msg); | |
299 | return; | |
300 | } | |
301 | ||
302 | genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), | |
303 | msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); | |
304 | } | |
305 | ||
306 | static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info) | |
307 | { | |
308 | struct devlink *devlink = info->user_ptr[0]; | |
309 | struct sk_buff *msg; | |
310 | int err; | |
311 | ||
312 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
313 | if (!msg) | |
314 | return -ENOMEM; | |
315 | ||
316 | err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, | |
317 | info->snd_portid, info->snd_seq, 0); | |
318 | if (err) { | |
319 | nlmsg_free(msg); | |
320 | return err; | |
321 | } | |
322 | ||
323 | return genlmsg_reply(msg, info); | |
324 | } | |
325 | ||
326 | static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg, | |
327 | struct netlink_callback *cb) | |
328 | { | |
329 | struct devlink *devlink; | |
330 | int start = cb->args[0]; | |
331 | int idx = 0; | |
332 | int err; | |
333 | ||
334 | mutex_lock(&devlink_mutex); | |
335 | list_for_each_entry(devlink, &devlink_list, list) { | |
336 | if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) | |
337 | continue; | |
338 | if (idx < start) { | |
339 | idx++; | |
340 | continue; | |
341 | } | |
342 | err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, | |
343 | NETLINK_CB(cb->skb).portid, | |
344 | cb->nlh->nlmsg_seq, NLM_F_MULTI); | |
345 | if (err) | |
346 | goto out; | |
347 | idx++; | |
348 | } | |
349 | out: | |
350 | mutex_unlock(&devlink_mutex); | |
351 | ||
352 | cb->args[0] = idx; | |
353 | return msg->len; | |
354 | } | |
355 | ||
356 | static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb, | |
357 | struct genl_info *info) | |
358 | { | |
359 | struct devlink *devlink = info->user_ptr[0]; | |
360 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
361 | struct sk_buff *msg; | |
362 | int err; | |
363 | ||
364 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
365 | if (!msg) | |
366 | return -ENOMEM; | |
367 | ||
368 | err = devlink_nl_port_fill(msg, devlink, devlink_port, | |
369 | DEVLINK_CMD_PORT_NEW, | |
370 | info->snd_portid, info->snd_seq, 0); | |
371 | if (err) { | |
372 | nlmsg_free(msg); | |
373 | return err; | |
374 | } | |
375 | ||
376 | return genlmsg_reply(msg, info); | |
377 | } | |
378 | ||
379 | static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg, | |
380 | struct netlink_callback *cb) | |
381 | { | |
382 | struct devlink *devlink; | |
383 | struct devlink_port *devlink_port; | |
384 | int start = cb->args[0]; | |
385 | int idx = 0; | |
386 | int err; | |
387 | ||
388 | mutex_lock(&devlink_mutex); | |
389 | mutex_lock(&devlink_port_mutex); | |
390 | list_for_each_entry(devlink, &devlink_list, list) { | |
391 | if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) | |
392 | continue; | |
393 | list_for_each_entry(devlink_port, &devlink->port_list, list) { | |
394 | if (idx < start) { | |
395 | idx++; | |
396 | continue; | |
397 | } | |
398 | err = devlink_nl_port_fill(msg, devlink, devlink_port, | |
399 | DEVLINK_CMD_NEW, | |
400 | NETLINK_CB(cb->skb).portid, | |
401 | cb->nlh->nlmsg_seq, | |
402 | NLM_F_MULTI); | |
403 | if (err) | |
404 | goto out; | |
405 | idx++; | |
406 | } | |
407 | } | |
408 | out: | |
409 | mutex_unlock(&devlink_port_mutex); | |
410 | mutex_unlock(&devlink_mutex); | |
411 | ||
412 | cb->args[0] = idx; | |
413 | return msg->len; | |
414 | } | |
415 | ||
416 | static int devlink_port_type_set(struct devlink *devlink, | |
417 | struct devlink_port *devlink_port, | |
418 | enum devlink_port_type port_type) | |
419 | ||
420 | { | |
421 | int err; | |
422 | ||
423 | if (devlink->ops && devlink->ops->port_type_set) { | |
424 | if (port_type == DEVLINK_PORT_TYPE_NOTSET) | |
425 | return -EINVAL; | |
426 | err = devlink->ops->port_type_set(devlink_port, port_type); | |
427 | if (err) | |
428 | return err; | |
429 | devlink_port->desired_type = port_type; | |
430 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
431 | return 0; | |
432 | } | |
433 | return -EOPNOTSUPP; | |
434 | } | |
435 | ||
436 | static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb, | |
437 | struct genl_info *info) | |
438 | { | |
439 | struct devlink *devlink = info->user_ptr[0]; | |
440 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
441 | int err; | |
442 | ||
443 | if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { | |
444 | enum devlink_port_type port_type; | |
445 | ||
446 | port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); | |
447 | err = devlink_port_type_set(devlink, devlink_port, port_type); | |
448 | if (err) | |
449 | return err; | |
450 | } | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static int devlink_port_split(struct devlink *devlink, | |
455 | u32 port_index, u32 count) | |
456 | ||
457 | { | |
458 | if (devlink->ops && devlink->ops->port_split) | |
459 | return devlink->ops->port_split(devlink, port_index, count); | |
460 | return -EOPNOTSUPP; | |
461 | } | |
462 | ||
463 | static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, | |
464 | struct genl_info *info) | |
465 | { | |
466 | struct devlink *devlink = info->user_ptr[0]; | |
467 | u32 port_index; | |
468 | u32 count; | |
469 | ||
470 | if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] || | |
471 | !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]) | |
472 | return -EINVAL; | |
473 | ||
474 | port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); | |
475 | count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); | |
476 | return devlink_port_split(devlink, port_index, count); | |
477 | } | |
478 | ||
479 | static int devlink_port_unsplit(struct devlink *devlink, u32 port_index) | |
480 | ||
481 | { | |
482 | if (devlink->ops && devlink->ops->port_unsplit) | |
483 | return devlink->ops->port_unsplit(devlink, port_index); | |
484 | return -EOPNOTSUPP; | |
485 | } | |
486 | ||
487 | static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb, | |
488 | struct genl_info *info) | |
489 | { | |
490 | struct devlink *devlink = info->user_ptr[0]; | |
491 | u32 port_index; | |
492 | ||
493 | if (!info->attrs[DEVLINK_ATTR_PORT_INDEX]) | |
494 | return -EINVAL; | |
495 | ||
496 | port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); | |
497 | return devlink_port_unsplit(devlink, port_index); | |
498 | } | |
499 | ||
500 | static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = { | |
501 | [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING }, | |
502 | [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING }, | |
503 | [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 }, | |
504 | [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 }, | |
505 | [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 }, | |
506 | }; | |
507 | ||
508 | static const struct genl_ops devlink_nl_ops[] = { | |
509 | { | |
510 | .cmd = DEVLINK_CMD_GET, | |
511 | .doit = devlink_nl_cmd_get_doit, | |
512 | .dumpit = devlink_nl_cmd_get_dumpit, | |
513 | .policy = devlink_nl_policy, | |
514 | /* can be retrieved by unprivileged users */ | |
515 | }, | |
516 | { | |
517 | .cmd = DEVLINK_CMD_PORT_GET, | |
518 | .doit = devlink_nl_cmd_port_get_doit, | |
519 | .dumpit = devlink_nl_cmd_port_get_dumpit, | |
520 | .policy = devlink_nl_policy, | |
521 | .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, | |
522 | /* can be retrieved by unprivileged users */ | |
523 | }, | |
524 | { | |
525 | .cmd = DEVLINK_CMD_PORT_SET, | |
526 | .doit = devlink_nl_cmd_port_set_doit, | |
527 | .policy = devlink_nl_policy, | |
528 | .flags = GENL_ADMIN_PERM, | |
529 | .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, | |
530 | }, | |
531 | { | |
532 | .cmd = DEVLINK_CMD_PORT_SPLIT, | |
533 | .doit = devlink_nl_cmd_port_split_doit, | |
534 | .policy = devlink_nl_policy, | |
535 | .flags = GENL_ADMIN_PERM, | |
536 | }, | |
537 | { | |
538 | .cmd = DEVLINK_CMD_PORT_UNSPLIT, | |
539 | .doit = devlink_nl_cmd_port_unsplit_doit, | |
540 | .policy = devlink_nl_policy, | |
541 | .flags = GENL_ADMIN_PERM, | |
542 | }, | |
543 | }; | |
544 | ||
545 | /** | |
546 | * devlink_alloc - Allocate new devlink instance resources | |
547 | * | |
548 | * @ops: ops | |
549 | * @priv_size: size of user private data | |
550 | * | |
551 | * Allocate new devlink instance resources, including devlink index | |
552 | * and name. | |
553 | */ | |
554 | struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size) | |
555 | { | |
556 | struct devlink *devlink; | |
557 | ||
558 | devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL); | |
559 | if (!devlink) | |
560 | return NULL; | |
561 | devlink->ops = ops; | |
562 | devlink_net_set(devlink, &init_net); | |
563 | INIT_LIST_HEAD(&devlink->port_list); | |
564 | return devlink; | |
565 | } | |
566 | EXPORT_SYMBOL_GPL(devlink_alloc); | |
567 | ||
568 | /** | |
569 | * devlink_register - Register devlink instance | |
570 | * | |
571 | * @devlink: devlink | |
572 | */ | |
573 | int devlink_register(struct devlink *devlink, struct device *dev) | |
574 | { | |
575 | mutex_lock(&devlink_mutex); | |
576 | devlink->dev = dev; | |
577 | list_add_tail(&devlink->list, &devlink_list); | |
578 | devlink_notify(devlink, DEVLINK_CMD_NEW); | |
579 | mutex_unlock(&devlink_mutex); | |
580 | return 0; | |
581 | } | |
582 | EXPORT_SYMBOL_GPL(devlink_register); | |
583 | ||
584 | /** | |
585 | * devlink_unregister - Unregister devlink instance | |
586 | * | |
587 | * @devlink: devlink | |
588 | */ | |
589 | void devlink_unregister(struct devlink *devlink) | |
590 | { | |
591 | mutex_lock(&devlink_mutex); | |
592 | devlink_notify(devlink, DEVLINK_CMD_DEL); | |
593 | list_del(&devlink->list); | |
594 | mutex_unlock(&devlink_mutex); | |
595 | } | |
596 | EXPORT_SYMBOL_GPL(devlink_unregister); | |
597 | ||
598 | /** | |
599 | * devlink_free - Free devlink instance resources | |
600 | * | |
601 | * @devlink: devlink | |
602 | */ | |
603 | void devlink_free(struct devlink *devlink) | |
604 | { | |
605 | kfree(devlink); | |
606 | } | |
607 | EXPORT_SYMBOL_GPL(devlink_free); | |
608 | ||
609 | /** | |
610 | * devlink_port_register - Register devlink port | |
611 | * | |
612 | * @devlink: devlink | |
613 | * @devlink_port: devlink port | |
614 | * @port_index | |
615 | * | |
616 | * Register devlink port with provided port index. User can use | |
617 | * any indexing, even hw-related one. devlink_port structure | |
618 | * is convenient to be embedded inside user driver private structure. | |
619 | * Note that the caller should take care of zeroing the devlink_port | |
620 | * structure. | |
621 | */ | |
622 | int devlink_port_register(struct devlink *devlink, | |
623 | struct devlink_port *devlink_port, | |
624 | unsigned int port_index) | |
625 | { | |
626 | mutex_lock(&devlink_port_mutex); | |
627 | if (devlink_port_index_exists(devlink, port_index)) { | |
628 | mutex_unlock(&devlink_port_mutex); | |
629 | return -EEXIST; | |
630 | } | |
631 | devlink_port->devlink = devlink; | |
632 | devlink_port->index = port_index; | |
633 | devlink_port->type = DEVLINK_PORT_TYPE_NOTSET; | |
634 | devlink_port->registered = true; | |
635 | list_add_tail(&devlink_port->list, &devlink->port_list); | |
636 | mutex_unlock(&devlink_port_mutex); | |
637 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
638 | return 0; | |
639 | } | |
640 | EXPORT_SYMBOL_GPL(devlink_port_register); | |
641 | ||
642 | /** | |
643 | * devlink_port_unregister - Unregister devlink port | |
644 | * | |
645 | * @devlink_port: devlink port | |
646 | */ | |
647 | void devlink_port_unregister(struct devlink_port *devlink_port) | |
648 | { | |
649 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); | |
650 | mutex_lock(&devlink_port_mutex); | |
651 | list_del(&devlink_port->list); | |
652 | mutex_unlock(&devlink_port_mutex); | |
653 | } | |
654 | EXPORT_SYMBOL_GPL(devlink_port_unregister); | |
655 | ||
656 | static void __devlink_port_type_set(struct devlink_port *devlink_port, | |
657 | enum devlink_port_type type, | |
658 | void *type_dev) | |
659 | { | |
660 | devlink_port->type = type; | |
661 | devlink_port->type_dev = type_dev; | |
662 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
663 | } | |
664 | ||
665 | /** | |
666 | * devlink_port_type_eth_set - Set port type to Ethernet | |
667 | * | |
668 | * @devlink_port: devlink port | |
669 | * @netdev: related netdevice | |
670 | */ | |
671 | void devlink_port_type_eth_set(struct devlink_port *devlink_port, | |
672 | struct net_device *netdev) | |
673 | { | |
674 | return __devlink_port_type_set(devlink_port, | |
675 | DEVLINK_PORT_TYPE_ETH, netdev); | |
676 | } | |
677 | EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); | |
678 | ||
679 | /** | |
680 | * devlink_port_type_ib_set - Set port type to InfiniBand | |
681 | * | |
682 | * @devlink_port: devlink port | |
683 | * @ibdev: related IB device | |
684 | */ | |
685 | void devlink_port_type_ib_set(struct devlink_port *devlink_port, | |
686 | struct ib_device *ibdev) | |
687 | { | |
688 | return __devlink_port_type_set(devlink_port, | |
689 | DEVLINK_PORT_TYPE_IB, ibdev); | |
690 | } | |
691 | EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); | |
692 | ||
693 | /** | |
694 | * devlink_port_type_clear - Clear port type | |
695 | * | |
696 | * @devlink_port: devlink port | |
697 | */ | |
698 | void devlink_port_type_clear(struct devlink_port *devlink_port) | |
699 | { | |
700 | return __devlink_port_type_set(devlink_port, | |
701 | DEVLINK_PORT_TYPE_NOTSET, NULL); | |
702 | } | |
703 | EXPORT_SYMBOL_GPL(devlink_port_type_clear); | |
704 | ||
705 | /** | |
706 | * devlink_port_split_set - Set port is split | |
707 | * | |
708 | * @devlink_port: devlink port | |
709 | * @split_group: split group - identifies group split port is part of | |
710 | */ | |
711 | void devlink_port_split_set(struct devlink_port *devlink_port, | |
712 | u32 split_group) | |
713 | { | |
714 | devlink_port->split = true; | |
715 | devlink_port->split_group = split_group; | |
716 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
717 | } | |
718 | EXPORT_SYMBOL_GPL(devlink_port_split_set); | |
719 | ||
720 | static int __init devlink_module_init(void) | |
721 | { | |
722 | return genl_register_family_with_ops_groups(&devlink_nl_family, | |
723 | devlink_nl_ops, | |
724 | devlink_nl_mcgrps); | |
725 | } | |
726 | ||
727 | static void __exit devlink_module_exit(void) | |
728 | { | |
729 | genl_unregister_family(&devlink_nl_family); | |
730 | } | |
731 | ||
732 | module_init(devlink_module_init); | |
733 | module_exit(devlink_module_exit); | |
734 | ||
735 | MODULE_LICENSE("GPL v2"); | |
736 | MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); | |
737 | MODULE_DESCRIPTION("Network physical device Netlink interface"); | |
738 | MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME); |