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airport: remove useless return in a function returning void
[linux/fpc-iii.git] / net / dcb / dcbnl.c
blob79a351d323af626a19a116cf70a26acb6fed642f
1 /*
2 * Copyright (c) 2008, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
16 *
17 * Author: Lucy Liu <lucy.liu@intel.com>
18 */
19
20 #include <linux/netdevice.h>
21 #include <linux/netlink.h>
22 #include <net/netlink.h>
23 #include <net/rtnetlink.h>
24 #include <linux/dcbnl.h>
25 #include <linux/rtnetlink.h>
26 #include <net/sock.h>
27
28 /**
29 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
30 * intended to allow network traffic with differing requirements
31 * (highly reliable, no drops vs. best effort vs. low latency) to operate
32 * and co-exist on Ethernet. Current DCB features are:
33 *
34 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
35 * framework for assigning bandwidth guarantees to traffic classes.
36 *
37 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
38 * can work independently for each 802.1p priority.
39 *
40 * Congestion Notification - provides a mechanism for end-to-end congestion
41 * control for protocols which do not have built-in congestion management.
42 *
43 * More information about the emerging standards for these Ethernet features
44 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
45 *
46 * This file implements an rtnetlink interface to allow configuration of DCB
47 * features for capable devices.
48 */
49
50 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
51 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
52 MODULE_LICENSE("GPL");
53
54 /**************** DCB attribute policies *************************************/
55
56 /* DCB netlink attributes policy */
57 static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
58 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
59 [DCB_ATTR_STATE] = {.type = NLA_U8},
60 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
61 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
62 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
63 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
64 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
65 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
66 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
67 };
68
69 /* DCB priority flow control to User Priority nested attributes */
70 static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
71 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
72 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
73 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
74 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
75 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
76 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
80 };
81
82 /* DCB priority grouping nested attributes */
83 static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
84 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
85 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
86 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
87 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
88 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
89 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
94 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
95 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
96 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
97 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
98 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
102 };
103
104 /* DCB traffic class nested attributes. */
105 static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
106 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
107 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
108 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
109 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
110 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
111 };
112
113 /* DCB capabilities nested attributes. */
114 static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
115 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
116 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
117 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
118 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
119 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
120 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
121 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
122 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
123 };
124
125 /* DCB capabilities nested attributes. */
126 static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
127 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
128 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
129 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
130 };
131
132 /* DCB BCN nested attributes. */
133 static struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
134 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
135 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
136 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
137 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
138 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
139 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
140 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
141 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
143 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
144 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
145 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
146 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
147 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
148 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
149 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
150 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
157 };
158
159 /* standard netlink reply call */
160 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
161 u32 seq, u16 flags)
162 {
163 struct sk_buff *dcbnl_skb;
164 struct dcbmsg *dcb;
165 struct nlmsghdr *nlh;
166 int ret = -EINVAL;
167
168 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
169 if (!dcbnl_skb)
170 return ret;
171
172 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
173
174 dcb = NLMSG_DATA(nlh);
175 dcb->dcb_family = AF_UNSPEC;
176 dcb->cmd = cmd;
177 dcb->dcb_pad = 0;
178
179 ret = nla_put_u8(dcbnl_skb, attr, value);
180 if (ret)
181 goto err;
182
183 /* end the message, assign the nlmsg_len. */
184 nlmsg_end(dcbnl_skb, nlh);
185 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
186 if (ret)
187 goto err;
188
189 return 0;
190 nlmsg_failure:
191 err:
192 kfree(dcbnl_skb);
193 return ret;
194 }
195
196 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
197 u32 pid, u32 seq, u16 flags)
198 {
199 int ret = -EINVAL;
200
201 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
202 if (!netdev->dcbnl_ops->getstate)
203 return ret;
204
205 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
206 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
207
208 return ret;
209 }
210
211 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
212 u32 pid, u32 seq, u16 flags)
213 {
214 struct sk_buff *dcbnl_skb;
215 struct nlmsghdr *nlh;
216 struct dcbmsg *dcb;
217 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
218 u8 value;
219 int ret = -EINVAL;
220 int i;
221 int getall = 0;
222
223 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
224 return ret;
225
226 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
227 tb[DCB_ATTR_PFC_CFG],
228 dcbnl_pfc_up_nest);
229 if (ret)
230 goto err_out;
231
232 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
233 if (!dcbnl_skb)
234 goto err_out;
235
236 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
237
238 dcb = NLMSG_DATA(nlh);
239 dcb->dcb_family = AF_UNSPEC;
240 dcb->cmd = DCB_CMD_PFC_GCFG;
241
242 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
243 if (!nest)
244 goto err;
245
246 if (data[DCB_PFC_UP_ATTR_ALL])
247 getall = 1;
248
249 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
250 if (!getall && !data[i])
251 continue;
252
253 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
254 &value);
255 ret = nla_put_u8(dcbnl_skb, i, value);
256
257 if (ret) {
258 nla_nest_cancel(dcbnl_skb, nest);
259 goto err;
260 }
261 }
262 nla_nest_end(dcbnl_skb, nest);
263
264 nlmsg_end(dcbnl_skb, nlh);
265
266 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
267 if (ret)
268 goto err;
269
270 return 0;
271 nlmsg_failure:
272 err:
273 kfree(dcbnl_skb);
274 err_out:
275 return -EINVAL;
276 }
277
278 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
279 u32 pid, u32 seq, u16 flags)
280 {
281 struct sk_buff *dcbnl_skb;
282 struct nlmsghdr *nlh;
283 struct dcbmsg *dcb;
284 u8 perm_addr[MAX_ADDR_LEN];
285 int ret = -EINVAL;
286
287 if (!netdev->dcbnl_ops->getpermhwaddr)
288 return ret;
289
290 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
291 if (!dcbnl_skb)
292 goto err_out;
293
294 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
295
296 dcb = NLMSG_DATA(nlh);
297 dcb->dcb_family = AF_UNSPEC;
298 dcb->cmd = DCB_CMD_GPERM_HWADDR;
299
300 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
301
302 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
303 perm_addr);
304
305 nlmsg_end(dcbnl_skb, nlh);
306
307 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
308 if (ret)
309 goto err;
310
311 return 0;
312
313 nlmsg_failure:
314 err:
315 kfree(dcbnl_skb);
316 err_out:
317 return -EINVAL;
318 }
319
320 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
321 u32 pid, u32 seq, u16 flags)
322 {
323 struct sk_buff *dcbnl_skb;
324 struct nlmsghdr *nlh;
325 struct dcbmsg *dcb;
326 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
327 u8 value;
328 int ret = -EINVAL;
329 int i;
330 int getall = 0;
331
332 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
333 return ret;
334
335 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
336 dcbnl_cap_nest);
337 if (ret)
338 goto err_out;
339
340 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
341 if (!dcbnl_skb)
342 goto err_out;
343
344 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
345
346 dcb = NLMSG_DATA(nlh);
347 dcb->dcb_family = AF_UNSPEC;
348 dcb->cmd = DCB_CMD_GCAP;
349
350 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
351 if (!nest)
352 goto err;
353
354 if (data[DCB_CAP_ATTR_ALL])
355 getall = 1;
356
357 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
358 if (!getall && !data[i])
359 continue;
360
361 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
362 ret = nla_put_u8(dcbnl_skb, i, value);
363
364 if (ret) {
365 nla_nest_cancel(dcbnl_skb, nest);
366 goto err;
367 }
368 }
369 }
370 nla_nest_end(dcbnl_skb, nest);
371
372 nlmsg_end(dcbnl_skb, nlh);
373
374 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
375 if (ret)
376 goto err;
377
378 return 0;
379 nlmsg_failure:
380 err:
381 kfree(dcbnl_skb);
382 err_out:
383 return -EINVAL;
384 }
385
386 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
387 u32 pid, u32 seq, u16 flags)
388 {
389 struct sk_buff *dcbnl_skb;
390 struct nlmsghdr *nlh;
391 struct dcbmsg *dcb;
392 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
393 u8 value;
394 int ret = -EINVAL;
395 int i;
396 int getall = 0;
397
398 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
399 return ret;
400
401 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
402 dcbnl_numtcs_nest);
403 if (ret) {
404 ret = -EINVAL;
405 goto err_out;
406 }
407
408 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
409 if (!dcbnl_skb) {
410 ret = -EINVAL;
411 goto err_out;
412 }
413
414 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
415
416 dcb = NLMSG_DATA(nlh);
417 dcb->dcb_family = AF_UNSPEC;
418 dcb->cmd = DCB_CMD_GNUMTCS;
419
420 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
421 if (!nest) {
422 ret = -EINVAL;
423 goto err;
424 }
425
426 if (data[DCB_NUMTCS_ATTR_ALL])
427 getall = 1;
428
429 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
430 if (!getall && !data[i])
431 continue;
432
433 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
434 if (!ret) {
435 ret = nla_put_u8(dcbnl_skb, i, value);
436
437 if (ret) {
438 nla_nest_cancel(dcbnl_skb, nest);
439 ret = -EINVAL;
440 goto err;
441 }
442 } else {
443 goto err;
444 }
445 }
446 nla_nest_end(dcbnl_skb, nest);
447
448 nlmsg_end(dcbnl_skb, nlh);
449
450 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
451 if (ret) {
452 ret = -EINVAL;
453 goto err;
454 }
455
456 return 0;
457 nlmsg_failure:
458 err:
459 kfree(dcbnl_skb);
460 err_out:
461 return ret;
462 }
463
464 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
465 u32 pid, u32 seq, u16 flags)
466 {
467 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
468 int ret = -EINVAL;
469 u8 value;
470 int i;
471
472 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setstate)
473 return ret;
474
475 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
476 dcbnl_numtcs_nest);
477
478 if (ret) {
479 ret = -EINVAL;
480 goto err;
481 }
482
483 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
484 if (data[i] == NULL)
485 continue;
486
487 value = nla_get_u8(data[i]);
488
489 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
490
491 if (ret)
492 goto operr;
493 }
494
495 operr:
496 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
497 DCB_ATTR_NUMTCS, pid, seq, flags);
498
499 err:
500 return ret;
501 }
502
503 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
504 u32 pid, u32 seq, u16 flags)
505 {
506 int ret = -EINVAL;
507
508 if (!netdev->dcbnl_ops->getpfcstate)
509 return ret;
510
511 ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
512 DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
513 pid, seq, flags);
514
515 return ret;
516 }
517
518 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
519 u32 pid, u32 seq, u16 flags)
520 {
521 int ret = -EINVAL;
522 u8 value;
523
524 if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
525 return ret;
526
527 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
528
529 netdev->dcbnl_ops->setpfcstate(netdev, value);
530
531 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
532 pid, seq, flags);
533
534 return ret;
535 }
536
537 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
538 u32 pid, u32 seq, u16 flags, int dir)
539 {
540 struct sk_buff *dcbnl_skb;
541 struct nlmsghdr *nlh;
542 struct dcbmsg *dcb;
543 struct nlattr *pg_nest, *param_nest, *data;
544 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
545 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
546 u8 prio, pgid, tc_pct, up_map;
547 int ret = -EINVAL;
548 int getall = 0;
549 int i;
550
551 if (!tb[DCB_ATTR_PG_CFG] ||
552 !netdev->dcbnl_ops->getpgtccfgtx ||
553 !netdev->dcbnl_ops->getpgtccfgrx ||
554 !netdev->dcbnl_ops->getpgbwgcfgtx ||
555 !netdev->dcbnl_ops->getpgbwgcfgrx)
556 return ret;
557
558 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
559 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
560
561 if (ret)
562 goto err_out;
563
564 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
565 if (!dcbnl_skb)
566 goto err_out;
567
568 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
569
570 dcb = NLMSG_DATA(nlh);
571 dcb->dcb_family = AF_UNSPEC;
572 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
573
574 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
575 if (!pg_nest)
576 goto err;
577
578 if (pg_tb[DCB_PG_ATTR_TC_ALL])
579 getall = 1;
580
581 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
582 if (!getall && !pg_tb[i])
583 continue;
584
585 if (pg_tb[DCB_PG_ATTR_TC_ALL])
586 data = pg_tb[DCB_PG_ATTR_TC_ALL];
587 else
588 data = pg_tb[i];
589 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
590 data, dcbnl_tc_param_nest);
591 if (ret)
592 goto err_pg;
593
594 param_nest = nla_nest_start(dcbnl_skb, i);
595 if (!param_nest)
596 goto err_pg;
597
598 pgid = DCB_ATTR_VALUE_UNDEFINED;
599 prio = DCB_ATTR_VALUE_UNDEFINED;
600 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
601 up_map = DCB_ATTR_VALUE_UNDEFINED;
602
603 if (dir) {
604 /* Rx */
605 netdev->dcbnl_ops->getpgtccfgrx(netdev,
606 i - DCB_PG_ATTR_TC_0, &prio,
607 &pgid, &tc_pct, &up_map);
608 } else {
609 /* Tx */
610 netdev->dcbnl_ops->getpgtccfgtx(netdev,
611 i - DCB_PG_ATTR_TC_0, &prio,
612 &pgid, &tc_pct, &up_map);
613 }
614
615 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
616 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
617 ret = nla_put_u8(dcbnl_skb,
618 DCB_TC_ATTR_PARAM_PGID, pgid);
619 if (ret)
620 goto err_param;
621 }
622 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
623 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
624 ret = nla_put_u8(dcbnl_skb,
625 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
626 if (ret)
627 goto err_param;
628 }
629 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
630 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
631 ret = nla_put_u8(dcbnl_skb,
632 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
633 if (ret)
634 goto err_param;
635 }
636 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
637 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
638 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
639 tc_pct);
640 if (ret)
641 goto err_param;
642 }
643 nla_nest_end(dcbnl_skb, param_nest);
644 }
645
646 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
647 getall = 1;
648 else
649 getall = 0;
650
651 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
652 if (!getall && !pg_tb[i])
653 continue;
654
655 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
656
657 if (dir) {
658 /* Rx */
659 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
660 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
661 } else {
662 /* Tx */
663 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
664 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
665 }
666 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
667
668 if (ret)
669 goto err_pg;
670 }
671
672 nla_nest_end(dcbnl_skb, pg_nest);
673
674 nlmsg_end(dcbnl_skb, nlh);
675
676 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
677 if (ret)
678 goto err;
679
680 return 0;
681
682 err_param:
683 nla_nest_cancel(dcbnl_skb, param_nest);
684 err_pg:
685 nla_nest_cancel(dcbnl_skb, pg_nest);
686 nlmsg_failure:
687 err:
688 kfree(dcbnl_skb);
689 err_out:
690 ret = -EINVAL;
691 return ret;
692 }
693
694 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
695 u32 pid, u32 seq, u16 flags)
696 {
697 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
698 }
699
700 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
701 u32 pid, u32 seq, u16 flags)
702 {
703 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
704 }
705
706 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
707 u32 pid, u32 seq, u16 flags)
708 {
709 int ret = -EINVAL;
710 u8 value;
711
712 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
713 return ret;
714
715 value = nla_get_u8(tb[DCB_ATTR_STATE]);
716
717 netdev->dcbnl_ops->setstate(netdev, value);
718
719 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
720 pid, seq, flags);
721
722 return ret;
723 }
724
725 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
726 u32 pid, u32 seq, u16 flags)
727 {
728 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
729 int i;
730 int ret = -EINVAL;
731 u8 value;
732
733 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
734 return ret;
735
736 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
737 tb[DCB_ATTR_PFC_CFG],
738 dcbnl_pfc_up_nest);
739 if (ret)
740 goto err;
741
742 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
743 if (data[i] == NULL)
744 continue;
745 value = nla_get_u8(data[i]);
746 netdev->dcbnl_ops->setpfccfg(netdev,
747 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
748 }
749
750 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
751 pid, seq, flags);
752 err:
753 return ret;
754 }
755
756 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
757 u32 pid, u32 seq, u16 flags)
758 {
759 int ret = -EINVAL;
760
761 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
762 return ret;
763
764 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
765 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
766
767 return ret;
768 }
769
770 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
771 u32 pid, u32 seq, u16 flags, int dir)
772 {
773 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
774 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
775 int ret = -EINVAL;
776 int i;
777 u8 pgid;
778 u8 up_map;
779 u8 prio;
780 u8 tc_pct;
781
782 if (!tb[DCB_ATTR_PG_CFG] ||
783 !netdev->dcbnl_ops->setpgtccfgtx ||
784 !netdev->dcbnl_ops->setpgtccfgrx ||
785 !netdev->dcbnl_ops->setpgbwgcfgtx ||
786 !netdev->dcbnl_ops->setpgbwgcfgrx)
787 return ret;
788
789 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
790 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
791 if (ret)
792 goto err;
793
794 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
795 if (!pg_tb[i])
796 continue;
797
798 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
799 pg_tb[i], dcbnl_tc_param_nest);
800 if (ret)
801 goto err;
802
803 pgid = DCB_ATTR_VALUE_UNDEFINED;
804 prio = DCB_ATTR_VALUE_UNDEFINED;
805 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
806 up_map = DCB_ATTR_VALUE_UNDEFINED;
807
808 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
809 prio =
810 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
811
812 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
813 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
814
815 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
816 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
817
818 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
819 up_map =
820 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
821
822 /* dir: Tx = 0, Rx = 1 */
823 if (dir) {
824 /* Rx */
825 netdev->dcbnl_ops->setpgtccfgrx(netdev,
826 i - DCB_PG_ATTR_TC_0,
827 prio, pgid, tc_pct, up_map);
828 } else {
829 /* Tx */
830 netdev->dcbnl_ops->setpgtccfgtx(netdev,
831 i - DCB_PG_ATTR_TC_0,
832 prio, pgid, tc_pct, up_map);
833 }
834 }
835
836 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
837 if (!pg_tb[i])
838 continue;
839
840 tc_pct = nla_get_u8(pg_tb[i]);
841
842 /* dir: Tx = 0, Rx = 1 */
843 if (dir) {
844 /* Rx */
845 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
846 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
847 } else {
848 /* Tx */
849 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
850 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
851 }
852 }
853
854 ret = dcbnl_reply(0, RTM_SETDCB,
855 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
856 DCB_ATTR_PG_CFG, pid, seq, flags);
857
858 err:
859 return ret;
860 }
861
862 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
863 u32 pid, u32 seq, u16 flags)
864 {
865 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
866 }
867
868 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
869 u32 pid, u32 seq, u16 flags)
870 {
871 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
872 }
873
874 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
875 u32 pid, u32 seq, u16 flags)
876 {
877 struct sk_buff *dcbnl_skb;
878 struct nlmsghdr *nlh;
879 struct dcbmsg *dcb;
880 struct nlattr *bcn_nest;
881 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
882 u8 value_byte;
883 u32 value_integer;
884 int ret = -EINVAL;
885 bool getall = false;
886 int i;
887
888 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
889 !netdev->dcbnl_ops->getbcncfg)
890 return ret;
891
892 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
893 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
894
895 if (ret)
896 goto err_out;
897
898 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
899 if (!dcbnl_skb)
900 goto err_out;
901
902 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
903
904 dcb = NLMSG_DATA(nlh);
905 dcb->dcb_family = AF_UNSPEC;
906 dcb->cmd = DCB_CMD_BCN_GCFG;
907
908 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
909 if (!bcn_nest)
910 goto err;
911
912 if (bcn_tb[DCB_BCN_ATTR_ALL])
913 getall = true;
914
915 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
916 if (!getall && !bcn_tb[i])
917 continue;
918
919 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
920 &value_byte);
921 ret = nla_put_u8(dcbnl_skb, i, value_byte);
922 if (ret)
923 goto err_bcn;
924 }
925
926 for (i = DCB_BCN_ATTR_ALPHA; i <= DCB_BCN_ATTR_RI; i++) {
927 if (!getall && !bcn_tb[i])
928 continue;
929
930 netdev->dcbnl_ops->getbcncfg(netdev, i,
931 &value_integer);
932 ret = nla_put_u32(dcbnl_skb, i, value_integer);
933 if (ret)
934 goto err_bcn;
935 }
936
937 nla_nest_end(dcbnl_skb, bcn_nest);
938
939 nlmsg_end(dcbnl_skb, nlh);
940
941 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
942 if (ret)
943 goto err;
944
945 return 0;
946
947 err_bcn:
948 nla_nest_cancel(dcbnl_skb, bcn_nest);
949 nlmsg_failure:
950 err:
951 kfree(dcbnl_skb);
952 err_out:
953 ret = -EINVAL;
954 return ret;
955 }
956
957 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
958 u32 pid, u32 seq, u16 flags)
959 {
960 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
961 int i;
962 int ret = -EINVAL;
963 u8 value_byte;
964 u32 value_int;
965
966 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg
967 || !netdev->dcbnl_ops->setbcnrp)
968 return ret;
969
970 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
971 tb[DCB_ATTR_BCN],
972 dcbnl_pfc_up_nest);
973 if (ret)
974 goto err;
975
976 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
977 if (data[i] == NULL)
978 continue;
979 value_byte = nla_get_u8(data[i]);
980 netdev->dcbnl_ops->setbcnrp(netdev,
981 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
982 }
983
984 for (i = DCB_BCN_ATTR_ALPHA; i <= DCB_BCN_ATTR_RI; i++) {
985 if (data[i] == NULL)
986 continue;
987 value_int = nla_get_u32(data[i]);
988 netdev->dcbnl_ops->setbcncfg(netdev,
989 i, value_int);
990 }
991
992 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
993 pid, seq, flags);
994 err:
995 return ret;
996 }
997
998 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
999 {
1000 struct net *net = sock_net(skb->sk);
1001 struct net_device *netdev;
1002 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1003 struct nlattr *tb[DCB_ATTR_MAX + 1];
1004 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1005 int ret = -EINVAL;
1006
1007 if (net != &init_net)
1008 return -EINVAL;
1009
1010 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1011 dcbnl_rtnl_policy);
1012 if (ret < 0)
1013 return ret;
1014
1015 if (!tb[DCB_ATTR_IFNAME])
1016 return -EINVAL;
1017
1018 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1019 if (!netdev)
1020 return -EINVAL;
1021
1022 if (!netdev->dcbnl_ops)
1023 goto errout;
1024
1025 switch (dcb->cmd) {
1026 case DCB_CMD_GSTATE:
1027 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1028 nlh->nlmsg_flags);
1029 goto out;
1030 case DCB_CMD_PFC_GCFG:
1031 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1032 nlh->nlmsg_flags);
1033 goto out;
1034 case DCB_CMD_GPERM_HWADDR:
1035 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1036 nlh->nlmsg_flags);
1037 goto out;
1038 case DCB_CMD_PGTX_GCFG:
1039 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1040 nlh->nlmsg_flags);
1041 goto out;
1042 case DCB_CMD_PGRX_GCFG:
1043 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1044 nlh->nlmsg_flags);
1045 goto out;
1046 case DCB_CMD_BCN_GCFG:
1047 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1048 nlh->nlmsg_flags);
1049 goto out;
1050 case DCB_CMD_SSTATE:
1051 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1052 nlh->nlmsg_flags);
1053 goto out;
1054 case DCB_CMD_PFC_SCFG:
1055 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1056 nlh->nlmsg_flags);
1057 goto out;
1058
1059 case DCB_CMD_SET_ALL:
1060 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1061 nlh->nlmsg_flags);
1062 goto out;
1063 case DCB_CMD_PGTX_SCFG:
1064 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1065 nlh->nlmsg_flags);
1066 goto out;
1067 case DCB_CMD_PGRX_SCFG:
1068 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1069 nlh->nlmsg_flags);
1070 goto out;
1071 case DCB_CMD_GCAP:
1072 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1073 nlh->nlmsg_flags);
1074 goto out;
1075 case DCB_CMD_GNUMTCS:
1076 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1077 nlh->nlmsg_flags);
1078 goto out;
1079 case DCB_CMD_SNUMTCS:
1080 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1081 nlh->nlmsg_flags);
1082 goto out;
1083 case DCB_CMD_PFC_GSTATE:
1084 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1085 nlh->nlmsg_flags);
1086 goto out;
1087 case DCB_CMD_PFC_SSTATE:
1088 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1089 nlh->nlmsg_flags);
1090 goto out;
1091 case DCB_CMD_BCN_SCFG:
1092 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1093 nlh->nlmsg_flags);
1094 goto out;
1095 default:
1096 goto errout;
1097 }
1098 errout:
1099 ret = -EINVAL;
1100 out:
1101 dev_put(netdev);
1102 return ret;
1103 }
1104
1105 static int __init dcbnl_init(void)
1106 {
1107 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1108 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1109
1110 return 0;
1111 }
1112 module_init(dcbnl_init);
1113
1114 static void __exit dcbnl_exit(void)
1115 {
1116 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1117 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1118 }
1119 module_exit(dcbnl_exit);
1120
1121
Linux with added FPC-III support