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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 | ||
1fc2257e JP |
122 | #define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0) |
123 | #define DEVLINK_NL_FLAG_NEED_PORT BIT(1) | |
bfcd3a46 JP |
124 | |
125 | static int devlink_nl_pre_doit(const struct genl_ops *ops, | |
126 | struct sk_buff *skb, struct genl_info *info) | |
127 | { | |
128 | struct devlink *devlink; | |
129 | ||
130 | mutex_lock(&devlink_mutex); | |
131 | devlink = devlink_get_from_info(info); | |
132 | if (IS_ERR(devlink)) { | |
133 | mutex_unlock(&devlink_mutex); | |
134 | return PTR_ERR(devlink); | |
135 | } | |
1fc2257e JP |
136 | if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) { |
137 | info->user_ptr[0] = devlink; | |
138 | } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) { | |
bfcd3a46 JP |
139 | struct devlink_port *devlink_port; |
140 | ||
141 | mutex_lock(&devlink_port_mutex); | |
142 | devlink_port = devlink_port_get_from_info(devlink, info); | |
143 | if (IS_ERR(devlink_port)) { | |
144 | mutex_unlock(&devlink_port_mutex); | |
145 | mutex_unlock(&devlink_mutex); | |
146 | return PTR_ERR(devlink_port); | |
147 | } | |
1fc2257e | 148 | info->user_ptr[0] = devlink_port; |
bfcd3a46 JP |
149 | } |
150 | return 0; | |
151 | } | |
152 | ||
153 | static void devlink_nl_post_doit(const struct genl_ops *ops, | |
154 | struct sk_buff *skb, struct genl_info *info) | |
155 | { | |
156 | if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) | |
157 | mutex_unlock(&devlink_port_mutex); | |
158 | mutex_unlock(&devlink_mutex); | |
159 | } | |
160 | ||
161 | static struct genl_family devlink_nl_family = { | |
162 | .id = GENL_ID_GENERATE, | |
163 | .name = DEVLINK_GENL_NAME, | |
164 | .version = DEVLINK_GENL_VERSION, | |
165 | .maxattr = DEVLINK_ATTR_MAX, | |
166 | .netnsok = true, | |
167 | .pre_doit = devlink_nl_pre_doit, | |
168 | .post_doit = devlink_nl_post_doit, | |
169 | }; | |
170 | ||
171 | enum devlink_multicast_groups { | |
172 | DEVLINK_MCGRP_CONFIG, | |
173 | }; | |
174 | ||
175 | static const struct genl_multicast_group devlink_nl_mcgrps[] = { | |
176 | [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME }, | |
177 | }; | |
178 | ||
179 | static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink) | |
180 | { | |
181 | if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name)) | |
182 | return -EMSGSIZE; | |
183 | if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev))) | |
184 | return -EMSGSIZE; | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink, | |
189 | enum devlink_command cmd, u32 portid, | |
190 | u32 seq, int flags) | |
191 | { | |
192 | void *hdr; | |
193 | ||
194 | hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); | |
195 | if (!hdr) | |
196 | return -EMSGSIZE; | |
197 | ||
198 | if (devlink_nl_put_handle(msg, devlink)) | |
199 | goto nla_put_failure; | |
200 | ||
201 | genlmsg_end(msg, hdr); | |
202 | return 0; | |
203 | ||
204 | nla_put_failure: | |
205 | genlmsg_cancel(msg, hdr); | |
206 | return -EMSGSIZE; | |
207 | } | |
208 | ||
209 | static void devlink_notify(struct devlink *devlink, enum devlink_command cmd) | |
210 | { | |
211 | struct sk_buff *msg; | |
212 | int err; | |
213 | ||
214 | WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL); | |
215 | ||
216 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
217 | if (!msg) | |
218 | return; | |
219 | ||
220 | err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0); | |
221 | if (err) { | |
222 | nlmsg_free(msg); | |
223 | return; | |
224 | } | |
225 | ||
226 | genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), | |
227 | msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); | |
228 | } | |
229 | ||
230 | static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink, | |
231 | struct devlink_port *devlink_port, | |
232 | enum devlink_command cmd, u32 portid, | |
233 | u32 seq, int flags) | |
234 | { | |
235 | void *hdr; | |
236 | ||
237 | hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); | |
238 | if (!hdr) | |
239 | return -EMSGSIZE; | |
240 | ||
241 | if (devlink_nl_put_handle(msg, devlink)) | |
242 | goto nla_put_failure; | |
243 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) | |
244 | goto nla_put_failure; | |
245 | if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) | |
246 | goto nla_put_failure; | |
247 | if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && | |
248 | nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, | |
249 | devlink_port->desired_type)) | |
250 | goto nla_put_failure; | |
251 | if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { | |
252 | struct net_device *netdev = devlink_port->type_dev; | |
253 | ||
254 | if (netdev && | |
255 | (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, | |
256 | netdev->ifindex) || | |
257 | nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, | |
258 | netdev->name))) | |
259 | goto nla_put_failure; | |
260 | } | |
261 | if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { | |
262 | struct ib_device *ibdev = devlink_port->type_dev; | |
263 | ||
264 | if (ibdev && | |
265 | nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, | |
266 | ibdev->name)) | |
267 | goto nla_put_failure; | |
268 | } | |
269 | if (devlink_port->split && | |
270 | nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, | |
271 | devlink_port->split_group)) | |
272 | goto nla_put_failure; | |
273 | ||
274 | genlmsg_end(msg, hdr); | |
275 | return 0; | |
276 | ||
277 | nla_put_failure: | |
278 | genlmsg_cancel(msg, hdr); | |
279 | return -EMSGSIZE; | |
280 | } | |
281 | ||
282 | static void devlink_port_notify(struct devlink_port *devlink_port, | |
283 | enum devlink_command cmd) | |
284 | { | |
285 | struct devlink *devlink = devlink_port->devlink; | |
286 | struct sk_buff *msg; | |
287 | int err; | |
288 | ||
289 | if (!devlink_port->registered) | |
290 | return; | |
291 | ||
292 | WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); | |
293 | ||
294 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
295 | if (!msg) | |
296 | return; | |
297 | ||
298 | err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0); | |
299 | if (err) { | |
300 | nlmsg_free(msg); | |
301 | return; | |
302 | } | |
303 | ||
304 | genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), | |
305 | msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); | |
306 | } | |
307 | ||
308 | static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info) | |
309 | { | |
310 | struct devlink *devlink = info->user_ptr[0]; | |
311 | struct sk_buff *msg; | |
312 | int err; | |
313 | ||
314 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
315 | if (!msg) | |
316 | return -ENOMEM; | |
317 | ||
318 | err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, | |
319 | info->snd_portid, info->snd_seq, 0); | |
320 | if (err) { | |
321 | nlmsg_free(msg); | |
322 | return err; | |
323 | } | |
324 | ||
325 | return genlmsg_reply(msg, info); | |
326 | } | |
327 | ||
328 | static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg, | |
329 | struct netlink_callback *cb) | |
330 | { | |
331 | struct devlink *devlink; | |
332 | int start = cb->args[0]; | |
333 | int idx = 0; | |
334 | int err; | |
335 | ||
336 | mutex_lock(&devlink_mutex); | |
337 | list_for_each_entry(devlink, &devlink_list, list) { | |
338 | if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) | |
339 | continue; | |
340 | if (idx < start) { | |
341 | idx++; | |
342 | continue; | |
343 | } | |
344 | err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, | |
345 | NETLINK_CB(cb->skb).portid, | |
346 | cb->nlh->nlmsg_seq, NLM_F_MULTI); | |
347 | if (err) | |
348 | goto out; | |
349 | idx++; | |
350 | } | |
351 | out: | |
352 | mutex_unlock(&devlink_mutex); | |
353 | ||
354 | cb->args[0] = idx; | |
355 | return msg->len; | |
356 | } | |
357 | ||
358 | static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb, | |
359 | struct genl_info *info) | |
360 | { | |
1fc2257e JP |
361 | struct devlink_port *devlink_port = info->user_ptr[0]; |
362 | struct devlink *devlink = devlink_port->devlink; | |
bfcd3a46 JP |
363 | struct sk_buff *msg; |
364 | int err; | |
365 | ||
366 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
367 | if (!msg) | |
368 | return -ENOMEM; | |
369 | ||
370 | err = devlink_nl_port_fill(msg, devlink, devlink_port, | |
371 | DEVLINK_CMD_PORT_NEW, | |
372 | info->snd_portid, info->snd_seq, 0); | |
373 | if (err) { | |
374 | nlmsg_free(msg); | |
375 | return err; | |
376 | } | |
377 | ||
378 | return genlmsg_reply(msg, info); | |
379 | } | |
380 | ||
381 | static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg, | |
382 | struct netlink_callback *cb) | |
383 | { | |
384 | struct devlink *devlink; | |
385 | struct devlink_port *devlink_port; | |
386 | int start = cb->args[0]; | |
387 | int idx = 0; | |
388 | int err; | |
389 | ||
390 | mutex_lock(&devlink_mutex); | |
391 | mutex_lock(&devlink_port_mutex); | |
392 | list_for_each_entry(devlink, &devlink_list, list) { | |
393 | if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) | |
394 | continue; | |
395 | list_for_each_entry(devlink_port, &devlink->port_list, list) { | |
396 | if (idx < start) { | |
397 | idx++; | |
398 | continue; | |
399 | } | |
400 | err = devlink_nl_port_fill(msg, devlink, devlink_port, | |
401 | DEVLINK_CMD_NEW, | |
402 | NETLINK_CB(cb->skb).portid, | |
403 | cb->nlh->nlmsg_seq, | |
404 | NLM_F_MULTI); | |
405 | if (err) | |
406 | goto out; | |
407 | idx++; | |
408 | } | |
409 | } | |
410 | out: | |
411 | mutex_unlock(&devlink_port_mutex); | |
412 | mutex_unlock(&devlink_mutex); | |
413 | ||
414 | cb->args[0] = idx; | |
415 | return msg->len; | |
416 | } | |
417 | ||
418 | static int devlink_port_type_set(struct devlink *devlink, | |
419 | struct devlink_port *devlink_port, | |
420 | enum devlink_port_type port_type) | |
421 | ||
422 | { | |
423 | int err; | |
424 | ||
425 | if (devlink->ops && devlink->ops->port_type_set) { | |
426 | if (port_type == DEVLINK_PORT_TYPE_NOTSET) | |
427 | return -EINVAL; | |
428 | err = devlink->ops->port_type_set(devlink_port, port_type); | |
429 | if (err) | |
430 | return err; | |
431 | devlink_port->desired_type = port_type; | |
432 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
433 | return 0; | |
434 | } | |
435 | return -EOPNOTSUPP; | |
436 | } | |
437 | ||
438 | static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb, | |
439 | struct genl_info *info) | |
440 | { | |
1fc2257e JP |
441 | struct devlink_port *devlink_port = info->user_ptr[0]; |
442 | struct devlink *devlink = devlink_port->devlink; | |
bfcd3a46 JP |
443 | int err; |
444 | ||
445 | if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { | |
446 | enum devlink_port_type port_type; | |
447 | ||
448 | port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); | |
449 | err = devlink_port_type_set(devlink, devlink_port, port_type); | |
450 | if (err) | |
451 | return err; | |
452 | } | |
453 | return 0; | |
454 | } | |
455 | ||
456 | static int devlink_port_split(struct devlink *devlink, | |
457 | u32 port_index, u32 count) | |
458 | ||
459 | { | |
460 | if (devlink->ops && devlink->ops->port_split) | |
461 | return devlink->ops->port_split(devlink, port_index, count); | |
462 | return -EOPNOTSUPP; | |
463 | } | |
464 | ||
465 | static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, | |
466 | struct genl_info *info) | |
467 | { | |
468 | struct devlink *devlink = info->user_ptr[0]; | |
469 | u32 port_index; | |
470 | u32 count; | |
471 | ||
472 | if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] || | |
473 | !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]) | |
474 | return -EINVAL; | |
475 | ||
476 | port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); | |
477 | count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); | |
478 | return devlink_port_split(devlink, port_index, count); | |
479 | } | |
480 | ||
481 | static int devlink_port_unsplit(struct devlink *devlink, u32 port_index) | |
482 | ||
483 | { | |
484 | if (devlink->ops && devlink->ops->port_unsplit) | |
485 | return devlink->ops->port_unsplit(devlink, port_index); | |
486 | return -EOPNOTSUPP; | |
487 | } | |
488 | ||
489 | static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb, | |
490 | struct genl_info *info) | |
491 | { | |
492 | struct devlink *devlink = info->user_ptr[0]; | |
493 | u32 port_index; | |
494 | ||
495 | if (!info->attrs[DEVLINK_ATTR_PORT_INDEX]) | |
496 | return -EINVAL; | |
497 | ||
498 | port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); | |
499 | return devlink_port_unsplit(devlink, port_index); | |
500 | } | |
501 | ||
502 | static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = { | |
503 | [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING }, | |
504 | [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING }, | |
505 | [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 }, | |
506 | [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 }, | |
507 | [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 }, | |
508 | }; | |
509 | ||
510 | static const struct genl_ops devlink_nl_ops[] = { | |
511 | { | |
512 | .cmd = DEVLINK_CMD_GET, | |
513 | .doit = devlink_nl_cmd_get_doit, | |
514 | .dumpit = devlink_nl_cmd_get_dumpit, | |
515 | .policy = devlink_nl_policy, | |
1fc2257e | 516 | .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK, |
bfcd3a46 JP |
517 | /* can be retrieved by unprivileged users */ |
518 | }, | |
519 | { | |
520 | .cmd = DEVLINK_CMD_PORT_GET, | |
521 | .doit = devlink_nl_cmd_port_get_doit, | |
522 | .dumpit = devlink_nl_cmd_port_get_dumpit, | |
523 | .policy = devlink_nl_policy, | |
524 | .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, | |
525 | /* can be retrieved by unprivileged users */ | |
526 | }, | |
527 | { | |
528 | .cmd = DEVLINK_CMD_PORT_SET, | |
529 | .doit = devlink_nl_cmd_port_set_doit, | |
530 | .policy = devlink_nl_policy, | |
531 | .flags = GENL_ADMIN_PERM, | |
532 | .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, | |
533 | }, | |
534 | { | |
535 | .cmd = DEVLINK_CMD_PORT_SPLIT, | |
536 | .doit = devlink_nl_cmd_port_split_doit, | |
537 | .policy = devlink_nl_policy, | |
538 | .flags = GENL_ADMIN_PERM, | |
1fc2257e | 539 | .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK, |
bfcd3a46 JP |
540 | }, |
541 | { | |
542 | .cmd = DEVLINK_CMD_PORT_UNSPLIT, | |
543 | .doit = devlink_nl_cmd_port_unsplit_doit, | |
544 | .policy = devlink_nl_policy, | |
545 | .flags = GENL_ADMIN_PERM, | |
1fc2257e | 546 | .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK, |
bfcd3a46 JP |
547 | }, |
548 | }; | |
549 | ||
550 | /** | |
551 | * devlink_alloc - Allocate new devlink instance resources | |
552 | * | |
553 | * @ops: ops | |
554 | * @priv_size: size of user private data | |
555 | * | |
556 | * Allocate new devlink instance resources, including devlink index | |
557 | * and name. | |
558 | */ | |
559 | struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size) | |
560 | { | |
561 | struct devlink *devlink; | |
562 | ||
563 | devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL); | |
564 | if (!devlink) | |
565 | return NULL; | |
566 | devlink->ops = ops; | |
567 | devlink_net_set(devlink, &init_net); | |
568 | INIT_LIST_HEAD(&devlink->port_list); | |
569 | return devlink; | |
570 | } | |
571 | EXPORT_SYMBOL_GPL(devlink_alloc); | |
572 | ||
573 | /** | |
574 | * devlink_register - Register devlink instance | |
575 | * | |
576 | * @devlink: devlink | |
577 | */ | |
578 | int devlink_register(struct devlink *devlink, struct device *dev) | |
579 | { | |
580 | mutex_lock(&devlink_mutex); | |
581 | devlink->dev = dev; | |
582 | list_add_tail(&devlink->list, &devlink_list); | |
583 | devlink_notify(devlink, DEVLINK_CMD_NEW); | |
584 | mutex_unlock(&devlink_mutex); | |
585 | return 0; | |
586 | } | |
587 | EXPORT_SYMBOL_GPL(devlink_register); | |
588 | ||
589 | /** | |
590 | * devlink_unregister - Unregister devlink instance | |
591 | * | |
592 | * @devlink: devlink | |
593 | */ | |
594 | void devlink_unregister(struct devlink *devlink) | |
595 | { | |
596 | mutex_lock(&devlink_mutex); | |
597 | devlink_notify(devlink, DEVLINK_CMD_DEL); | |
598 | list_del(&devlink->list); | |
599 | mutex_unlock(&devlink_mutex); | |
600 | } | |
601 | EXPORT_SYMBOL_GPL(devlink_unregister); | |
602 | ||
603 | /** | |
604 | * devlink_free - Free devlink instance resources | |
605 | * | |
606 | * @devlink: devlink | |
607 | */ | |
608 | void devlink_free(struct devlink *devlink) | |
609 | { | |
610 | kfree(devlink); | |
611 | } | |
612 | EXPORT_SYMBOL_GPL(devlink_free); | |
613 | ||
614 | /** | |
615 | * devlink_port_register - Register devlink port | |
616 | * | |
617 | * @devlink: devlink | |
618 | * @devlink_port: devlink port | |
619 | * @port_index | |
620 | * | |
621 | * Register devlink port with provided port index. User can use | |
622 | * any indexing, even hw-related one. devlink_port structure | |
623 | * is convenient to be embedded inside user driver private structure. | |
624 | * Note that the caller should take care of zeroing the devlink_port | |
625 | * structure. | |
626 | */ | |
627 | int devlink_port_register(struct devlink *devlink, | |
628 | struct devlink_port *devlink_port, | |
629 | unsigned int port_index) | |
630 | { | |
631 | mutex_lock(&devlink_port_mutex); | |
632 | if (devlink_port_index_exists(devlink, port_index)) { | |
633 | mutex_unlock(&devlink_port_mutex); | |
634 | return -EEXIST; | |
635 | } | |
636 | devlink_port->devlink = devlink; | |
637 | devlink_port->index = port_index; | |
bfcd3a46 JP |
638 | devlink_port->registered = true; |
639 | list_add_tail(&devlink_port->list, &devlink->port_list); | |
640 | mutex_unlock(&devlink_port_mutex); | |
641 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
642 | return 0; | |
643 | } | |
644 | EXPORT_SYMBOL_GPL(devlink_port_register); | |
645 | ||
646 | /** | |
647 | * devlink_port_unregister - Unregister devlink port | |
648 | * | |
649 | * @devlink_port: devlink port | |
650 | */ | |
651 | void devlink_port_unregister(struct devlink_port *devlink_port) | |
652 | { | |
653 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); | |
654 | mutex_lock(&devlink_port_mutex); | |
655 | list_del(&devlink_port->list); | |
656 | mutex_unlock(&devlink_port_mutex); | |
657 | } | |
658 | EXPORT_SYMBOL_GPL(devlink_port_unregister); | |
659 | ||
660 | static void __devlink_port_type_set(struct devlink_port *devlink_port, | |
661 | enum devlink_port_type type, | |
662 | void *type_dev) | |
663 | { | |
664 | devlink_port->type = type; | |
665 | devlink_port->type_dev = type_dev; | |
666 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
667 | } | |
668 | ||
669 | /** | |
670 | * devlink_port_type_eth_set - Set port type to Ethernet | |
671 | * | |
672 | * @devlink_port: devlink port | |
673 | * @netdev: related netdevice | |
674 | */ | |
675 | void devlink_port_type_eth_set(struct devlink_port *devlink_port, | |
676 | struct net_device *netdev) | |
677 | { | |
678 | return __devlink_port_type_set(devlink_port, | |
679 | DEVLINK_PORT_TYPE_ETH, netdev); | |
680 | } | |
681 | EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); | |
682 | ||
683 | /** | |
684 | * devlink_port_type_ib_set - Set port type to InfiniBand | |
685 | * | |
686 | * @devlink_port: devlink port | |
687 | * @ibdev: related IB device | |
688 | */ | |
689 | void devlink_port_type_ib_set(struct devlink_port *devlink_port, | |
690 | struct ib_device *ibdev) | |
691 | { | |
692 | return __devlink_port_type_set(devlink_port, | |
693 | DEVLINK_PORT_TYPE_IB, ibdev); | |
694 | } | |
695 | EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); | |
696 | ||
697 | /** | |
698 | * devlink_port_type_clear - Clear port type | |
699 | * | |
700 | * @devlink_port: devlink port | |
701 | */ | |
702 | void devlink_port_type_clear(struct devlink_port *devlink_port) | |
703 | { | |
704 | return __devlink_port_type_set(devlink_port, | |
705 | DEVLINK_PORT_TYPE_NOTSET, NULL); | |
706 | } | |
707 | EXPORT_SYMBOL_GPL(devlink_port_type_clear); | |
708 | ||
709 | /** | |
710 | * devlink_port_split_set - Set port is split | |
711 | * | |
712 | * @devlink_port: devlink port | |
713 | * @split_group: split group - identifies group split port is part of | |
714 | */ | |
715 | void devlink_port_split_set(struct devlink_port *devlink_port, | |
716 | u32 split_group) | |
717 | { | |
718 | devlink_port->split = true; | |
719 | devlink_port->split_group = split_group; | |
720 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
721 | } | |
722 | EXPORT_SYMBOL_GPL(devlink_port_split_set); | |
723 | ||
724 | static int __init devlink_module_init(void) | |
725 | { | |
726 | return genl_register_family_with_ops_groups(&devlink_nl_family, | |
727 | devlink_nl_ops, | |
728 | devlink_nl_mcgrps); | |
729 | } | |
730 | ||
731 | static void __exit devlink_module_exit(void) | |
732 | { | |
733 | genl_unregister_family(&devlink_nl_family); | |
734 | } | |
735 | ||
736 | module_init(devlink_module_init); | |
737 | module_exit(devlink_module_exit); | |
738 | ||
739 | MODULE_LICENSE("GPL v2"); | |
740 | MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); | |
741 | MODULE_DESCRIPTION("Network physical device Netlink interface"); | |
742 | MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME); |