projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ixgbe: this patch adds support for DCB to the kernel and ixgbe driver
[linux-2.6-block.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},
64};
65
66/* DCB priority flow control to User Priority nested attributes */
67static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
68 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
69 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
70 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
71 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
72 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
73 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
74 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
75 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
76 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
77};
78
79/* DCB priority grouping nested attributes */
80static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
81 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
82 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
83 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
84 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
85 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
86 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
87 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
88 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
89 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
91 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
92 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
93 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
94 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
95 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
96 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
97 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
98 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
99};
100
101/* DCB traffic class nested attributes. */
102static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
103 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
104 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
105 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
106 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
107 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
108};
109
110
111/* standard netlink reply call */
112static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
113 u32 seq, u16 flags)
114{
115 struct sk_buff *dcbnl_skb;
116 struct dcbmsg *dcb;
117 struct nlmsghdr *nlh;
118 int ret = -EINVAL;
119
120 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
121 if (!dcbnl_skb)
122 return ret;
123
124 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
125
126 dcb = NLMSG_DATA(nlh);
127 dcb->dcb_family = AF_UNSPEC;
128 dcb->cmd = cmd;
129 dcb->dcb_pad = 0;
130
131 ret = nla_put_u8(dcbnl_skb, attr, value);
132 if (ret)
133 goto err;
134
135 /* end the message, assign the nlmsg_len. */
136 nlmsg_end(dcbnl_skb, nlh);
137 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
138 if (ret)
139 goto err;
140
141 return 0;
142nlmsg_failure:
143err:
144 kfree(dcbnl_skb);
145 return ret;
146}
147
148static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
149 u32 pid, u32 seq, u16 flags)
150{
151 int ret = -EINVAL;
152
153 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
154 if (!netdev->dcbnl_ops->getstate)
155 return ret;
156
157 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
158 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
159
160 return ret;
161}
162
163static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
164 u32 pid, u32 seq, u16 flags)
165{
166 struct sk_buff *dcbnl_skb;
167 struct nlmsghdr *nlh;
168 struct dcbmsg *dcb;
169 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
170 u8 value;
171 int ret = -EINVAL;
172 int i;
173 int getall = 0;
174
175 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
176 return ret;
177
178 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
179 tb[DCB_ATTR_PFC_CFG],
180 dcbnl_pfc_up_nest);
181 if (ret)
182 goto err_out;
183
184 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
185 if (!dcbnl_skb)
186 goto err_out;
187
188 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
189
190 dcb = NLMSG_DATA(nlh);
191 dcb->dcb_family = AF_UNSPEC;
192 dcb->cmd = DCB_CMD_PFC_GCFG;
193
194 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
195 if (!nest)
196 goto err;
197
198 if (data[DCB_PFC_UP_ATTR_ALL])
199 getall = 1;
200
201 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
202 if (!getall && !data[i])
203 continue;
204
205 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
206 &value);
207 ret = nla_put_u8(dcbnl_skb, i, value);
208
209 if (ret) {
210 nla_nest_cancel(dcbnl_skb, nest);
211 goto err;
212 }
213 }
214 nla_nest_end(dcbnl_skb, nest);
215
216 nlmsg_end(dcbnl_skb, nlh);
217
218 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
219 if (ret)
220 goto err;
221
222 return 0;
223nlmsg_failure:
224err:
225 kfree(dcbnl_skb);
226err_out:
227 return -EINVAL;
228}
229
230static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
231 u32 pid, u32 seq, u16 flags)
232{
233 struct sk_buff *dcbnl_skb;
234 struct nlmsghdr *nlh;
235 struct dcbmsg *dcb;
236 u8 perm_addr[MAX_ADDR_LEN];
237 int ret = -EINVAL;
238
239 if (!netdev->dcbnl_ops->getpermhwaddr)
240 return ret;
241
242 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
243 if (!dcbnl_skb)
244 goto err_out;
245
246 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
247
248 dcb = NLMSG_DATA(nlh);
249 dcb->dcb_family = AF_UNSPEC;
250 dcb->cmd = DCB_CMD_GPERM_HWADDR;
251
252 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
253
254 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
255 perm_addr);
256
257 nlmsg_end(dcbnl_skb, nlh);
258
259 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
260 if (ret)
261 goto err;
262
263 return 0;
264
265nlmsg_failure:
266err:
267 kfree(dcbnl_skb);
268err_out:
269 return -EINVAL;
270}
271
272static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
273 u32 pid, u32 seq, u16 flags, int dir)
274{
275 struct sk_buff *dcbnl_skb;
276 struct nlmsghdr *nlh;
277 struct dcbmsg *dcb;
278 struct nlattr *pg_nest, *param_nest, *data;
279 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
280 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
281 u8 prio, pgid, tc_pct, up_map;
282 int ret = -EINVAL;
283 int getall = 0;
284 int i;
285
286 if (!tb[DCB_ATTR_PG_CFG] ||
287 !netdev->dcbnl_ops->getpgtccfgtx ||
288 !netdev->dcbnl_ops->getpgtccfgrx ||
289 !netdev->dcbnl_ops->getpgbwgcfgtx ||
290 !netdev->dcbnl_ops->getpgbwgcfgrx)
291 return ret;
292
293 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
294 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
295
296 if (ret)
297 goto err_out;
298
299 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
300 if (!dcbnl_skb)
301 goto err_out;
302
303 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
304
305 dcb = NLMSG_DATA(nlh);
306 dcb->dcb_family = AF_UNSPEC;
307 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
308
309 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
310 if (!pg_nest)
311 goto err;
312
313 if (pg_tb[DCB_PG_ATTR_TC_ALL])
314 getall = 1;
315
316 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
317 if (!getall && !pg_tb[i])
318 continue;
319
320 if (pg_tb[DCB_PG_ATTR_TC_ALL])
321 data = pg_tb[DCB_PG_ATTR_TC_ALL];
322 else
323 data = pg_tb[i];
324 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
325 data, dcbnl_tc_param_nest);
326 if (ret)
327 goto err_pg;
328
329 param_nest = nla_nest_start(dcbnl_skb, i);
330 if (!param_nest)
331 goto err_pg;
332
333 pgid = DCB_ATTR_VALUE_UNDEFINED;
334 prio = DCB_ATTR_VALUE_UNDEFINED;
335 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
336 up_map = DCB_ATTR_VALUE_UNDEFINED;
337
338 if (dir) {
339 /* Rx */
340 netdev->dcbnl_ops->getpgtccfgrx(netdev,
341 i - DCB_PG_ATTR_TC_0, &prio,
342 &pgid, &tc_pct, &up_map);
343 } else {
344 /* Tx */
345 netdev->dcbnl_ops->getpgtccfgtx(netdev,
346 i - DCB_PG_ATTR_TC_0, &prio,
347 &pgid, &tc_pct, &up_map);
348 }
349
350 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
351 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
352 ret = nla_put_u8(dcbnl_skb,
353 DCB_TC_ATTR_PARAM_PGID, pgid);
354 if (ret)
355 goto err_param;
356 }
357 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
358 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
359 ret = nla_put_u8(dcbnl_skb,
360 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
361 if (ret)
362 goto err_param;
363 }
364 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
365 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
366 ret = nla_put_u8(dcbnl_skb,
367 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
368 if (ret)
369 goto err_param;
370 }
371 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
372 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
373 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
374 tc_pct);
375 if (ret)
376 goto err_param;
377 }
378 nla_nest_end(dcbnl_skb, param_nest);
379 }
380
381 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
382 getall = 1;
383 else
384 getall = 0;
385
386 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
387 if (!getall && !pg_tb[i])
388 continue;
389
390 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
391
392 if (dir) {
393 /* Rx */
394 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
395 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
396 } else {
397 /* Tx */
398 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
399 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
400 }
401 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
402
403 if (ret)
404 goto err_pg;
405 }
406
407 nla_nest_end(dcbnl_skb, pg_nest);
408
409 nlmsg_end(dcbnl_skb, nlh);
410
411 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
412 if (ret)
413 goto err;
414
415 return 0;
416
417err_param:
418 nla_nest_cancel(dcbnl_skb, param_nest);
419err_pg:
420 nla_nest_cancel(dcbnl_skb, pg_nest);
421nlmsg_failure:
422err:
423 kfree(dcbnl_skb);
424err_out:
425 ret = -EINVAL;
426 return ret;
427}
428
429static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
430 u32 pid, u32 seq, u16 flags)
431{
432 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
433}
434
435static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
436 u32 pid, u32 seq, u16 flags)
437{
438 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
439}
440
441static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
442 u32 pid, u32 seq, u16 flags)
443{
444 int ret = -EINVAL;
445 u8 value;
446
447 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
448 return ret;
449
450 value = nla_get_u8(tb[DCB_ATTR_STATE]);
451
452 netdev->dcbnl_ops->setstate(netdev, value);
453
454 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
455 pid, seq, flags);
456
457 return ret;
458}
459
460static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
461 u32 pid, u32 seq, u16 flags)
462{
463 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
464 int i;
465 int ret = -EINVAL;
466 u8 value;
467
468 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
469 return ret;
470
471 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
472 tb[DCB_ATTR_PFC_CFG],
473 dcbnl_pfc_up_nest);
474 if (ret)
475 goto err;
476
477 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
478 if (data[i] == NULL)
479 continue;
480 value = nla_get_u8(data[i]);
481 netdev->dcbnl_ops->setpfccfg(netdev,
482 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
483 }
484
485 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
486 pid, seq, flags);
487err:
488 return ret;
489}
490
491static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
492 u32 pid, u32 seq, u16 flags)
493{
494 int ret = -EINVAL;
495
496 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
497 return ret;
498
499 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
500 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
501
502 return ret;
503}
504
505static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
506 u32 pid, u32 seq, u16 flags, int dir)
507{
508 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
509 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
510 int ret = -EINVAL;
511 int i;
512 u8 pgid;
513 u8 up_map;
514 u8 prio;
515 u8 tc_pct;
516
517 if (!tb[DCB_ATTR_PG_CFG] ||
518 !netdev->dcbnl_ops->setpgtccfgtx ||
519 !netdev->dcbnl_ops->setpgtccfgrx ||
520 !netdev->dcbnl_ops->setpgbwgcfgtx ||
521 !netdev->dcbnl_ops->setpgbwgcfgrx)
522 return ret;
523
524 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
525 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
526 if (ret)
527 goto err;
528
529 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
530 if (!pg_tb[i])
531 continue;
532
533 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
534 pg_tb[i], dcbnl_tc_param_nest);
535 if (ret)
536 goto err;
537
538 pgid = DCB_ATTR_VALUE_UNDEFINED;
539 prio = DCB_ATTR_VALUE_UNDEFINED;
540 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
541 up_map = DCB_ATTR_VALUE_UNDEFINED;
542
543 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
544 prio =
545 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
546
547 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
548 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
549
550 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
551 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
552
553 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
554 up_map =
555 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
556
557 /* dir: Tx = 0, Rx = 1 */
558 if (dir) {
559 /* Rx */
560 netdev->dcbnl_ops->setpgtccfgrx(netdev,
561 i - DCB_PG_ATTR_TC_0,
562 prio, pgid, tc_pct, up_map);
563 } else {
564 /* Tx */
565 netdev->dcbnl_ops->setpgtccfgtx(netdev,
566 i - DCB_PG_ATTR_TC_0,
567 prio, pgid, tc_pct, up_map);
568 }
569 }
570
571 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
572 if (!pg_tb[i])
573 continue;
574
575 tc_pct = nla_get_u8(pg_tb[i]);
576
577 /* dir: Tx = 0, Rx = 1 */
578 if (dir) {
579 /* Rx */
580 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
581 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
582 } else {
583 /* Tx */
584 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
585 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
586 }
587 }
588
589 ret = dcbnl_reply(0, RTM_SETDCB,
590 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
591 DCB_ATTR_PG_CFG, pid, seq, flags);
592
593err:
594 return ret;
595}
596
597static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
598 u32 pid, u32 seq, u16 flags)
599{
600 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
601}
602
603static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
604 u32 pid, u32 seq, u16 flags)
605{
606 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
607}
608
609static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
610{
611 struct net *net = sock_net(skb->sk);
612 struct net_device *netdev;
613 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
614 struct nlattr *tb[DCB_ATTR_MAX + 1];
615 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
616 int ret = -EINVAL;
617
618 if (net != &init_net)
619 return -EINVAL;
620
621 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
622 dcbnl_rtnl_policy);
623 if (ret < 0)
624 return ret;
625
626 if (!tb[DCB_ATTR_IFNAME])
627 return -EINVAL;
628
629 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
630 if (!netdev)
631 return -EINVAL;
632
633 if (!netdev->dcbnl_ops)
634 goto errout;
635
636 switch (dcb->cmd) {
637 case DCB_CMD_GSTATE:
638 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
639 nlh->nlmsg_flags);
640 goto out;
641 case DCB_CMD_PFC_GCFG:
642 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
643 nlh->nlmsg_flags);
644 goto out;
645 case DCB_CMD_GPERM_HWADDR:
646 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
647 nlh->nlmsg_flags);
648 goto out;
649 case DCB_CMD_PGTX_GCFG:
650 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
651 nlh->nlmsg_flags);
652 goto out;
653 case DCB_CMD_PGRX_GCFG:
654 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
655 nlh->nlmsg_flags);
656 goto out;
657 case DCB_CMD_SSTATE:
658 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
659 nlh->nlmsg_flags);
660 goto out;
661 case DCB_CMD_PFC_SCFG:
662 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
663 nlh->nlmsg_flags);
664 goto out;
665
666 case DCB_CMD_SET_ALL:
667 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
668 nlh->nlmsg_flags);
669 goto out;
670 case DCB_CMD_PGTX_SCFG:
671 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
672 nlh->nlmsg_flags);
673 goto out;
674 case DCB_CMD_PGRX_SCFG:
675 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
676 nlh->nlmsg_flags);
677 goto out;
678 default:
679 goto errout;
680 }
681errout:
682 ret = -EINVAL;
683out:
684 dev_put(netdev);
685 return ret;
686}
687
688static int __init dcbnl_init(void)
689{
690 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
691 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
692
693 return 0;
694}
695module_init(dcbnl_init);
696
697static void __exit dcbnl_exit(void)
698{
699 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
700 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
701}
702module_exit(dcbnl_exit);
703
704
Linux 6.x block layer and io_uring tree(s)