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DCB: Add interface to query # of TCs supported by device
[deliverable/linux.git] / net / dcb / dcbnl.c
CommitLineData
2f90b865
AD		 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
50MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
51MODULE_DESCRIPTION("Data Center Bridging generic netlink interface");
52MODULE_LICENSE("GPL");
53
54/**************** DCB attribute policies *************************************/
55
56/* DCB netlink attributes policy */
57static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
58 [DCB_ATTR_IFNAME] = {.type = NLA_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},
46132188 64 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
2f90b865
AD		 65};
66
67/* DCB priority flow control to User Priority nested attributes */
68static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
69 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
70 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
71 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
72 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
73 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
74 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
75 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
76 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
78};
79
80/* DCB priority grouping nested attributes */
81static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
82 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
83 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
84 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
85 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
86 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
87 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
88 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
89 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
92 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
93 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
94 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
95 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
96 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
97 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
98 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
100};
101
102/* DCB traffic class nested attributes. */
103static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
104 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
105 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
106 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
107 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
108 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
109};
110
46132188
AD		 111/* DCB capabilities nested attributes. */
112static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
113 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
114 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
115 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
116 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
117 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
118 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
119 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
120 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
121};
2f90b865 122
33dbabc4
AD		 123/* DCB capabilities nested attributes. */
124static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
125 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
126 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
127 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
128};
129
2f90b865
AD		 130/* standard netlink reply call */
131static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
132 u32 seq, u16 flags)
133{
134 struct sk_buff *dcbnl_skb;
135 struct dcbmsg *dcb;
136 struct nlmsghdr *nlh;
137 int ret = -EINVAL;
138
139 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
140 if (!dcbnl_skb)
141 return ret;
142
143 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
144
145 dcb = NLMSG_DATA(nlh);
146 dcb->dcb_family = AF_UNSPEC;
147 dcb->cmd = cmd;
148 dcb->dcb_pad = 0;
149
150 ret = nla_put_u8(dcbnl_skb, attr, value);
151 if (ret)
152 goto err;
153
154 /* end the message, assign the nlmsg_len. */
155 nlmsg_end(dcbnl_skb, nlh);
156 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
157 if (ret)
158 goto err;
159
160 return 0;
161nlmsg_failure:
162err:
163 kfree(dcbnl_skb);
164 return ret;
165}
166
167static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
168 u32 pid, u32 seq, u16 flags)
169{
170 int ret = -EINVAL;
171
172 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
173 if (!netdev->dcbnl_ops->getstate)
174 return ret;
175
176 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
177 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
178
179 return ret;
180}
181
182static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
183 u32 pid, u32 seq, u16 flags)
184{
185 struct sk_buff *dcbnl_skb;
186 struct nlmsghdr *nlh;
187 struct dcbmsg *dcb;
188 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
189 u8 value;
190 int ret = -EINVAL;
191 int i;
192 int getall = 0;
193
194 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
195 return ret;
196
197 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
198 tb[DCB_ATTR_PFC_CFG],
199 dcbnl_pfc_up_nest);
200 if (ret)
201 goto err_out;
202
203 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
204 if (!dcbnl_skb)
205 goto err_out;
206
207 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
208
209 dcb = NLMSG_DATA(nlh);
210 dcb->dcb_family = AF_UNSPEC;
211 dcb->cmd = DCB_CMD_PFC_GCFG;
212
213 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
214 if (!nest)
215 goto err;
216
217 if (data[DCB_PFC_UP_ATTR_ALL])
218 getall = 1;
219
220 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
221 if (!getall && !data[i])
222 continue;
223
224 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
225 &value);
226 ret = nla_put_u8(dcbnl_skb, i, value);
227
228 if (ret) {
229 nla_nest_cancel(dcbnl_skb, nest);
230 goto err;
231 }
232 }
233 nla_nest_end(dcbnl_skb, nest);
234
235 nlmsg_end(dcbnl_skb, nlh);
236
237 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
238 if (ret)
239 goto err;
240
241 return 0;
242nlmsg_failure:
243err:
244 kfree(dcbnl_skb);
245err_out:
246 return -EINVAL;
247}
248
249static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
250 u32 pid, u32 seq, u16 flags)
251{
252 struct sk_buff *dcbnl_skb;
253 struct nlmsghdr *nlh;
254 struct dcbmsg *dcb;
255 u8 perm_addr[MAX_ADDR_LEN];
256 int ret = -EINVAL;
257
258 if (!netdev->dcbnl_ops->getpermhwaddr)
259 return ret;
260
261 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
262 if (!dcbnl_skb)
263 goto err_out;
264
265 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
266
267 dcb = NLMSG_DATA(nlh);
268 dcb->dcb_family = AF_UNSPEC;
269 dcb->cmd = DCB_CMD_GPERM_HWADDR;
270
271 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
272
273 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
274 perm_addr);
275
276 nlmsg_end(dcbnl_skb, nlh);
277
278 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
279 if (ret)
280 goto err;
281
282 return 0;
283
284nlmsg_failure:
285err:
286 kfree(dcbnl_skb);
287err_out:
288 return -EINVAL;
289}
290
46132188
AD		 291static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
292 u32 pid, u32 seq, u16 flags)
293{
294 struct sk_buff *dcbnl_skb;
295 struct nlmsghdr *nlh;
296 struct dcbmsg *dcb;
297 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
298 u8 value;
299 int ret = -EINVAL;
300 int i;
301 int getall = 0;
302
303 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
304 return ret;
305
306 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
307 dcbnl_cap_nest);
308 if (ret)
309 goto err_out;
310
311 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
312 if (!dcbnl_skb)
313 goto err_out;
314
315 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
316
317 dcb = NLMSG_DATA(nlh);
318 dcb->dcb_family = AF_UNSPEC;
319 dcb->cmd = DCB_CMD_GCAP;
320
321 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
322 if (!nest)
323 goto err;
324
325 if (data[DCB_CAP_ATTR_ALL])
326 getall = 1;
327
328 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
329 if (!getall && !data[i])
330 continue;
331
332 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
333 ret = nla_put_u8(dcbnl_skb, i, value);
334
335 if (ret) {
336 nla_nest_cancel(dcbnl_skb, nest);
337 goto err;
338 }
339 }
340 }
341 nla_nest_end(dcbnl_skb, nest);
342
343 nlmsg_end(dcbnl_skb, nlh);
344
345 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
346 if (ret)
347 goto err;
348
349 return 0;
350nlmsg_failure:
351err:
352 kfree(dcbnl_skb);
353err_out:
354 return -EINVAL;
355}
356
33dbabc4
AD		 357static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
358 u32 pid, u32 seq, u16 flags)
359{
360 struct sk_buff *dcbnl_skb;
361 struct nlmsghdr *nlh;
362 struct dcbmsg *dcb;
363 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
364 u8 value;
365 int ret = -EINVAL;
366 int i;
367 int getall = 0;
368
369 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
370 return ret;
371
372 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
373 dcbnl_numtcs_nest);
374 if (ret) {
375 ret = -EINVAL;
376 goto err_out;
377 }
378
379 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
380 if (!dcbnl_skb) {
381 ret = -EINVAL;
382 goto err_out;
383 }
384
385 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
386
387 dcb = NLMSG_DATA(nlh);
388 dcb->dcb_family = AF_UNSPEC;
389 dcb->cmd = DCB_CMD_GNUMTCS;
390
391 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
392 if (!nest) {
393 ret = -EINVAL;
394 goto err;
395 }
396
397 if (data[DCB_NUMTCS_ATTR_ALL])
398 getall = 1;
399
400 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
401 if (!getall && !data[i])
402 continue;
403
404 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
405 if (!ret) {
406 ret = nla_put_u8(dcbnl_skb, i, value);
407
408 if (ret) {
409 nla_nest_cancel(dcbnl_skb, nest);
410 ret = -EINVAL;
411 goto err;
412 }
413 } else {
414 goto err;
415 }
416 }
417 nla_nest_end(dcbnl_skb, nest);
418
419 nlmsg_end(dcbnl_skb, nlh);
420
421 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
422 if (ret) {
423 ret = -EINVAL;
424 goto err;
425 }
426
427 return 0;
428nlmsg_failure:
429err:
430 kfree(dcbnl_skb);
431err_out:
432 return ret;
433}
434
435static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
436 u32 pid, u32 seq, u16 flags)
437{
438 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
439 int ret = -EINVAL;
440 u8 value;
441 int i;
442
443 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setstate)
444 return ret;
445
446 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
447 dcbnl_numtcs_nest);
448
449 if (ret) {
450 ret = -EINVAL;
451 goto err;
452 }
453
454 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
455 if (data[i] == NULL)
456 continue;
457
458 value = nla_get_u8(data[i]);
459
460 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
461
462 if (ret)
463 goto operr;
464 }
465
466operr:
467 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
468 DCB_ATTR_NUMTCS, pid, seq, flags);
469
470err:
471 return ret;
472}
473
2f90b865
AD		 474static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
475 u32 pid, u32 seq, u16 flags, int dir)
476{
477 struct sk_buff *dcbnl_skb;
478 struct nlmsghdr *nlh;
479 struct dcbmsg *dcb;
480 struct nlattr *pg_nest, *param_nest, *data;
481 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
482 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
483 u8 prio, pgid, tc_pct, up_map;
484 int ret = -EINVAL;
485 int getall = 0;
486 int i;
487
488 if (!tb[DCB_ATTR_PG_CFG] ||
489 !netdev->dcbnl_ops->getpgtccfgtx ||
490 !netdev->dcbnl_ops->getpgtccfgrx ||
491 !netdev->dcbnl_ops->getpgbwgcfgtx ||
492 !netdev->dcbnl_ops->getpgbwgcfgrx)
493 return ret;
494
495 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
496 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
497
498 if (ret)
499 goto err_out;
500
501 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
502 if (!dcbnl_skb)
503 goto err_out;
504
505 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
506
507 dcb = NLMSG_DATA(nlh);
508 dcb->dcb_family = AF_UNSPEC;
509 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
510
511 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
512 if (!pg_nest)
513 goto err;
514
515 if (pg_tb[DCB_PG_ATTR_TC_ALL])
516 getall = 1;
517
518 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
519 if (!getall && !pg_tb[i])
520 continue;
521
522 if (pg_tb[DCB_PG_ATTR_TC_ALL])
523 data = pg_tb[DCB_PG_ATTR_TC_ALL];
524 else
525 data = pg_tb[i];
526 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
527 data, dcbnl_tc_param_nest);
528 if (ret)
529 goto err_pg;
530
531 param_nest = nla_nest_start(dcbnl_skb, i);
532 if (!param_nest)
533 goto err_pg;
534
535 pgid = DCB_ATTR_VALUE_UNDEFINED;
536 prio = DCB_ATTR_VALUE_UNDEFINED;
537 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
538 up_map = DCB_ATTR_VALUE_UNDEFINED;
539
540 if (dir) {
541 /* Rx */
542 netdev->dcbnl_ops->getpgtccfgrx(netdev,
543 i - DCB_PG_ATTR_TC_0, &prio,
544 &pgid, &tc_pct, &up_map);
545 } else {
546 /* Tx */
547 netdev->dcbnl_ops->getpgtccfgtx(netdev,
548 i - DCB_PG_ATTR_TC_0, &prio,
549 &pgid, &tc_pct, &up_map);
550 }
551
552 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
553 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
554 ret = nla_put_u8(dcbnl_skb,
555 DCB_TC_ATTR_PARAM_PGID, pgid);
556 if (ret)
557 goto err_param;
558 }
559 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
560 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
561 ret = nla_put_u8(dcbnl_skb,
562 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
563 if (ret)
564 goto err_param;
565 }
566 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
567 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
568 ret = nla_put_u8(dcbnl_skb,
569 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
570 if (ret)
571 goto err_param;
572 }
573 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
574 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
575 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
576 tc_pct);
577 if (ret)
578 goto err_param;
579 }
580 nla_nest_end(dcbnl_skb, param_nest);
581 }
582
583 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
584 getall = 1;
585 else
586 getall = 0;
587
588 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
589 if (!getall && !pg_tb[i])
590 continue;
591
592 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
593
594 if (dir) {
595 /* Rx */
596 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
597 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
598 } else {
599 /* Tx */
600 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
601 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
602 }
603 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
604
605 if (ret)
606 goto err_pg;
607 }
608
609 nla_nest_end(dcbnl_skb, pg_nest);
610
611 nlmsg_end(dcbnl_skb, nlh);
612
613 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
614 if (ret)
615 goto err;
616
617 return 0;
618
619err_param:
620 nla_nest_cancel(dcbnl_skb, param_nest);
621err_pg:
622 nla_nest_cancel(dcbnl_skb, pg_nest);
623nlmsg_failure:
624err:
625 kfree(dcbnl_skb);
626err_out:
627 ret = -EINVAL;
628 return ret;
629}
630
631static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
632 u32 pid, u32 seq, u16 flags)
633{
634 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
635}
636
637static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
638 u32 pid, u32 seq, u16 flags)
639{
640 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
641}
642
643static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
644 u32 pid, u32 seq, u16 flags)
645{
646 int ret = -EINVAL;
647 u8 value;
648
649 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
650 return ret;
651
652 value = nla_get_u8(tb[DCB_ATTR_STATE]);
653
654 netdev->dcbnl_ops->setstate(netdev, value);
655
656 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
657 pid, seq, flags);
658
659 return ret;
660}
661
662static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
663 u32 pid, u32 seq, u16 flags)
664{
665 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
666 int i;
667 int ret = -EINVAL;
668 u8 value;
669
670 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
671 return ret;
672
673 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
674 tb[DCB_ATTR_PFC_CFG],
675 dcbnl_pfc_up_nest);
676 if (ret)
677 goto err;
678
679 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
680 if (data[i] == NULL)
681 continue;
682 value = nla_get_u8(data[i]);
683 netdev->dcbnl_ops->setpfccfg(netdev,
684 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
685 }
686
687 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
688 pid, seq, flags);
689err:
690 return ret;
691}
692
693static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
694 u32 pid, u32 seq, u16 flags)
695{
696 int ret = -EINVAL;
697
698 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
699 return ret;
700
701 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
702 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
703
704 return ret;
705}
706
707static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
708 u32 pid, u32 seq, u16 flags, int dir)
709{
710 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
711 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
712 int ret = -EINVAL;
713 int i;
714 u8 pgid;
715 u8 up_map;
716 u8 prio;
717 u8 tc_pct;
718
719 if (!tb[DCB_ATTR_PG_CFG] ||
720 !netdev->dcbnl_ops->setpgtccfgtx ||
721 !netdev->dcbnl_ops->setpgtccfgrx ||
722 !netdev->dcbnl_ops->setpgbwgcfgtx ||
723 !netdev->dcbnl_ops->setpgbwgcfgrx)
724 return ret;
725
726 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
727 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
728 if (ret)
729 goto err;
730
731 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
732 if (!pg_tb[i])
733 continue;
734
735 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
736 pg_tb[i], dcbnl_tc_param_nest);
737 if (ret)
738 goto err;
739
740 pgid = DCB_ATTR_VALUE_UNDEFINED;
741 prio = DCB_ATTR_VALUE_UNDEFINED;
742 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
743 up_map = DCB_ATTR_VALUE_UNDEFINED;
744
745 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
746 prio =
747 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
748
749 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
750 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
751
752 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
753 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
754
755 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
756 up_map =
757 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
758
759 /* dir: Tx = 0, Rx = 1 */
760 if (dir) {
761 /* Rx */
762 netdev->dcbnl_ops->setpgtccfgrx(netdev,
763 i - DCB_PG_ATTR_TC_0,
764 prio, pgid, tc_pct, up_map);
765 } else {
766 /* Tx */
767 netdev->dcbnl_ops->setpgtccfgtx(netdev,
768 i - DCB_PG_ATTR_TC_0,
769 prio, pgid, tc_pct, up_map);
770 }
771 }
772
773 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
774 if (!pg_tb[i])
775 continue;
776
777 tc_pct = nla_get_u8(pg_tb[i]);
778
779 /* dir: Tx = 0, Rx = 1 */
780 if (dir) {
781 /* Rx */
782 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
783 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
784 } else {
785 /* Tx */
786 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
787 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
788 }
789 }
790
791 ret = dcbnl_reply(0, RTM_SETDCB,
792 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
793 DCB_ATTR_PG_CFG, pid, seq, flags);
794
795err:
796 return ret;
797}
798
799static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
800 u32 pid, u32 seq, u16 flags)
801{
802 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
803}
804
805static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
806 u32 pid, u32 seq, u16 flags)
807{
808 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
809}
810
811static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
812{
813 struct net *net = sock_net(skb->sk);
814 struct net_device *netdev;
815 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
816 struct nlattr *tb[DCB_ATTR_MAX + 1];
817 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
818 int ret = -EINVAL;
819
820 if (net != &init_net)
821 return -EINVAL;
822
823 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
824 dcbnl_rtnl_policy);
825 if (ret < 0)
826 return ret;
827
828 if (!tb[DCB_ATTR_IFNAME])
829 return -EINVAL;
830
831 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
832 if (!netdev)
833 return -EINVAL;
834
835 if (!netdev->dcbnl_ops)
836 goto errout;
837
838 switch (dcb->cmd) {
839 case DCB_CMD_GSTATE:
840 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
841 nlh->nlmsg_flags);
842 goto out;
843 case DCB_CMD_PFC_GCFG:
844 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
845 nlh->nlmsg_flags);
846 goto out;
847 case DCB_CMD_GPERM_HWADDR:
848 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
849 nlh->nlmsg_flags);
850 goto out;
851 case DCB_CMD_PGTX_GCFG:
852 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
853 nlh->nlmsg_flags);
854 goto out;
855 case DCB_CMD_PGRX_GCFG:
856 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
857 nlh->nlmsg_flags);
858 goto out;
859 case DCB_CMD_SSTATE:
860 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
861 nlh->nlmsg_flags);
862 goto out;
863 case DCB_CMD_PFC_SCFG:
864 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
865 nlh->nlmsg_flags);
866 goto out;
867
868 case DCB_CMD_SET_ALL:
869 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
870 nlh->nlmsg_flags);
871 goto out;
872 case DCB_CMD_PGTX_SCFG:
873 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
874 nlh->nlmsg_flags);
875 goto out;
876 case DCB_CMD_PGRX_SCFG:
877 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
878 nlh->nlmsg_flags);
879 goto out;
46132188
AD		 880 case DCB_CMD_GCAP:
881 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
882 nlh->nlmsg_flags);
883 goto out;
33dbabc4
AD		 884 case DCB_CMD_GNUMTCS:
885 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
886 nlh->nlmsg_flags);
887 goto out;
888 case DCB_CMD_SNUMTCS:
889 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
890 nlh->nlmsg_flags);
891 goto out;
2f90b865
AD		 892 default:
893 goto errout;
894 }
895errout:
896 ret = -EINVAL;
897out:
898 dev_put(netdev);
899 return ret;
900}
901
902static int __init dcbnl_init(void)
903{
904 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
905 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
906
907 return 0;
908}
909module_init(dcbnl_init);
910
911static void __exit dcbnl_exit(void)
912{
913 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
914 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
915}
916module_exit(dcbnl_exit);
917
918
Linux kernel - Deliverables
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