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DCB: Add interface to query for the DCB capabilities of an device.
[GitHub/mt8127/android_kernel_alcatel_ttab.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
AD		 122
123/* standard netlink reply call */
124static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
125 u32 seq, u16 flags)
126{
127 struct sk_buff *dcbnl_skb;
128 struct dcbmsg *dcb;
129 struct nlmsghdr *nlh;
130 int ret = -EINVAL;
131
132 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
133 if (!dcbnl_skb)
134 return ret;
135
136 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
137
138 dcb = NLMSG_DATA(nlh);
139 dcb->dcb_family = AF_UNSPEC;
140 dcb->cmd = cmd;
141 dcb->dcb_pad = 0;
142
143 ret = nla_put_u8(dcbnl_skb, attr, value);
144 if (ret)
145 goto err;
146
147 /* end the message, assign the nlmsg_len. */
148 nlmsg_end(dcbnl_skb, nlh);
149 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
150 if (ret)
151 goto err;
152
153 return 0;
154nlmsg_failure:
155err:
156 kfree(dcbnl_skb);
157 return ret;
158}
159
160static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
161 u32 pid, u32 seq, u16 flags)
162{
163 int ret = -EINVAL;
164
165 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
166 if (!netdev->dcbnl_ops->getstate)
167 return ret;
168
169 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
170 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
171
172 return ret;
173}
174
175static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
176 u32 pid, u32 seq, u16 flags)
177{
178 struct sk_buff *dcbnl_skb;
179 struct nlmsghdr *nlh;
180 struct dcbmsg *dcb;
181 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
182 u8 value;
183 int ret = -EINVAL;
184 int i;
185 int getall = 0;
186
187 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
188 return ret;
189
190 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
191 tb[DCB_ATTR_PFC_CFG],
192 dcbnl_pfc_up_nest);
193 if (ret)
194 goto err_out;
195
196 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
197 if (!dcbnl_skb)
198 goto err_out;
199
200 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
201
202 dcb = NLMSG_DATA(nlh);
203 dcb->dcb_family = AF_UNSPEC;
204 dcb->cmd = DCB_CMD_PFC_GCFG;
205
206 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
207 if (!nest)
208 goto err;
209
210 if (data[DCB_PFC_UP_ATTR_ALL])
211 getall = 1;
212
213 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
214 if (!getall && !data[i])
215 continue;
216
217 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
218 &value);
219 ret = nla_put_u8(dcbnl_skb, i, value);
220
221 if (ret) {
222 nla_nest_cancel(dcbnl_skb, nest);
223 goto err;
224 }
225 }
226 nla_nest_end(dcbnl_skb, nest);
227
228 nlmsg_end(dcbnl_skb, nlh);
229
230 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
231 if (ret)
232 goto err;
233
234 return 0;
235nlmsg_failure:
236err:
237 kfree(dcbnl_skb);
238err_out:
239 return -EINVAL;
240}
241
242static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
243 u32 pid, u32 seq, u16 flags)
244{
245 struct sk_buff *dcbnl_skb;
246 struct nlmsghdr *nlh;
247 struct dcbmsg *dcb;
248 u8 perm_addr[MAX_ADDR_LEN];
249 int ret = -EINVAL;
250
251 if (!netdev->dcbnl_ops->getpermhwaddr)
252 return ret;
253
254 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
255 if (!dcbnl_skb)
256 goto err_out;
257
258 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
259
260 dcb = NLMSG_DATA(nlh);
261 dcb->dcb_family = AF_UNSPEC;
262 dcb->cmd = DCB_CMD_GPERM_HWADDR;
263
264 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
265
266 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
267 perm_addr);
268
269 nlmsg_end(dcbnl_skb, nlh);
270
271 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
272 if (ret)
273 goto err;
274
275 return 0;
276
277nlmsg_failure:
278err:
279 kfree(dcbnl_skb);
280err_out:
281 return -EINVAL;
282}
283
46132188
AD		 284static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
285 u32 pid, u32 seq, u16 flags)
286{
287 struct sk_buff *dcbnl_skb;
288 struct nlmsghdr *nlh;
289 struct dcbmsg *dcb;
290 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
291 u8 value;
292 int ret = -EINVAL;
293 int i;
294 int getall = 0;
295
296 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
297 return ret;
298
299 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
300 dcbnl_cap_nest);
301 if (ret)
302 goto err_out;
303
304 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
305 if (!dcbnl_skb)
306 goto err_out;
307
308 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
309
310 dcb = NLMSG_DATA(nlh);
311 dcb->dcb_family = AF_UNSPEC;
312 dcb->cmd = DCB_CMD_GCAP;
313
314 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
315 if (!nest)
316 goto err;
317
318 if (data[DCB_CAP_ATTR_ALL])
319 getall = 1;
320
321 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
322 if (!getall && !data[i])
323 continue;
324
325 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
326 ret = nla_put_u8(dcbnl_skb, i, value);
327
328 if (ret) {
329 nla_nest_cancel(dcbnl_skb, nest);
330 goto err;
331 }
332 }
333 }
334 nla_nest_end(dcbnl_skb, nest);
335
336 nlmsg_end(dcbnl_skb, nlh);
337
338 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
339 if (ret)
340 goto err;
341
342 return 0;
343nlmsg_failure:
344err:
345 kfree(dcbnl_skb);
346err_out:
347 return -EINVAL;
348}
349
2f90b865
AD		 350static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
351 u32 pid, u32 seq, u16 flags, int dir)
352{
353 struct sk_buff *dcbnl_skb;
354 struct nlmsghdr *nlh;
355 struct dcbmsg *dcb;
356 struct nlattr *pg_nest, *param_nest, *data;
357 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
358 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
359 u8 prio, pgid, tc_pct, up_map;
360 int ret = -EINVAL;
361 int getall = 0;
362 int i;
363
364 if (!tb[DCB_ATTR_PG_CFG] ||
365 !netdev->dcbnl_ops->getpgtccfgtx ||
366 !netdev->dcbnl_ops->getpgtccfgrx ||
367 !netdev->dcbnl_ops->getpgbwgcfgtx ||
368 !netdev->dcbnl_ops->getpgbwgcfgrx)
369 return ret;
370
371 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
372 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
373
374 if (ret)
375 goto err_out;
376
377 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
378 if (!dcbnl_skb)
379 goto err_out;
380
381 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
382
383 dcb = NLMSG_DATA(nlh);
384 dcb->dcb_family = AF_UNSPEC;
385 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
386
387 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
388 if (!pg_nest)
389 goto err;
390
391 if (pg_tb[DCB_PG_ATTR_TC_ALL])
392 getall = 1;
393
394 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
395 if (!getall && !pg_tb[i])
396 continue;
397
398 if (pg_tb[DCB_PG_ATTR_TC_ALL])
399 data = pg_tb[DCB_PG_ATTR_TC_ALL];
400 else
401 data = pg_tb[i];
402 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
403 data, dcbnl_tc_param_nest);
404 if (ret)
405 goto err_pg;
406
407 param_nest = nla_nest_start(dcbnl_skb, i);
408 if (!param_nest)
409 goto err_pg;
410
411 pgid = DCB_ATTR_VALUE_UNDEFINED;
412 prio = DCB_ATTR_VALUE_UNDEFINED;
413 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
414 up_map = DCB_ATTR_VALUE_UNDEFINED;
415
416 if (dir) {
417 /* Rx */
418 netdev->dcbnl_ops->getpgtccfgrx(netdev,
419 i - DCB_PG_ATTR_TC_0, &prio,
420 &pgid, &tc_pct, &up_map);
421 } else {
422 /* Tx */
423 netdev->dcbnl_ops->getpgtccfgtx(netdev,
424 i - DCB_PG_ATTR_TC_0, &prio,
425 &pgid, &tc_pct, &up_map);
426 }
427
428 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
429 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
430 ret = nla_put_u8(dcbnl_skb,
431 DCB_TC_ATTR_PARAM_PGID, pgid);
432 if (ret)
433 goto err_param;
434 }
435 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
436 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
437 ret = nla_put_u8(dcbnl_skb,
438 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
439 if (ret)
440 goto err_param;
441 }
442 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
443 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
444 ret = nla_put_u8(dcbnl_skb,
445 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
446 if (ret)
447 goto err_param;
448 }
449 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
450 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
451 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
452 tc_pct);
453 if (ret)
454 goto err_param;
455 }
456 nla_nest_end(dcbnl_skb, param_nest);
457 }
458
459 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
460 getall = 1;
461 else
462 getall = 0;
463
464 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
465 if (!getall && !pg_tb[i])
466 continue;
467
468 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
469
470 if (dir) {
471 /* Rx */
472 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
473 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
474 } else {
475 /* Tx */
476 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
477 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
478 }
479 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
480
481 if (ret)
482 goto err_pg;
483 }
484
485 nla_nest_end(dcbnl_skb, pg_nest);
486
487 nlmsg_end(dcbnl_skb, nlh);
488
489 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
490 if (ret)
491 goto err;
492
493 return 0;
494
495err_param:
496 nla_nest_cancel(dcbnl_skb, param_nest);
497err_pg:
498 nla_nest_cancel(dcbnl_skb, pg_nest);
499nlmsg_failure:
500err:
501 kfree(dcbnl_skb);
502err_out:
503 ret = -EINVAL;
504 return ret;
505}
506
507static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
508 u32 pid, u32 seq, u16 flags)
509{
510 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
511}
512
513static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
514 u32 pid, u32 seq, u16 flags)
515{
516 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
517}
518
519static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
520 u32 pid, u32 seq, u16 flags)
521{
522 int ret = -EINVAL;
523 u8 value;
524
525 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
526 return ret;
527
528 value = nla_get_u8(tb[DCB_ATTR_STATE]);
529
530 netdev->dcbnl_ops->setstate(netdev, value);
531
532 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
533 pid, seq, flags);
534
535 return ret;
536}
537
538static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
539 u32 pid, u32 seq, u16 flags)
540{
541 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
542 int i;
543 int ret = -EINVAL;
544 u8 value;
545
546 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
547 return ret;
548
549 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
550 tb[DCB_ATTR_PFC_CFG],
551 dcbnl_pfc_up_nest);
552 if (ret)
553 goto err;
554
555 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
556 if (data[i] == NULL)
557 continue;
558 value = nla_get_u8(data[i]);
559 netdev->dcbnl_ops->setpfccfg(netdev,
560 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
561 }
562
563 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
564 pid, seq, flags);
565err:
566 return ret;
567}
568
569static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
570 u32 pid, u32 seq, u16 flags)
571{
572 int ret = -EINVAL;
573
574 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
575 return ret;
576
577 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
578 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
579
580 return ret;
581}
582
583static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
584 u32 pid, u32 seq, u16 flags, int dir)
585{
586 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
587 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
588 int ret = -EINVAL;
589 int i;
590 u8 pgid;
591 u8 up_map;
592 u8 prio;
593 u8 tc_pct;
594
595 if (!tb[DCB_ATTR_PG_CFG] ||
596 !netdev->dcbnl_ops->setpgtccfgtx ||
597 !netdev->dcbnl_ops->setpgtccfgrx ||
598 !netdev->dcbnl_ops->setpgbwgcfgtx ||
599 !netdev->dcbnl_ops->setpgbwgcfgrx)
600 return ret;
601
602 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
603 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
604 if (ret)
605 goto err;
606
607 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
608 if (!pg_tb[i])
609 continue;
610
611 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
612 pg_tb[i], dcbnl_tc_param_nest);
613 if (ret)
614 goto err;
615
616 pgid = DCB_ATTR_VALUE_UNDEFINED;
617 prio = DCB_ATTR_VALUE_UNDEFINED;
618 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
619 up_map = DCB_ATTR_VALUE_UNDEFINED;
620
621 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
622 prio =
623 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
624
625 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
626 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
627
628 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
629 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
630
631 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
632 up_map =
633 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
634
635 /* dir: Tx = 0, Rx = 1 */
636 if (dir) {
637 /* Rx */
638 netdev->dcbnl_ops->setpgtccfgrx(netdev,
639 i - DCB_PG_ATTR_TC_0,
640 prio, pgid, tc_pct, up_map);
641 } else {
642 /* Tx */
643 netdev->dcbnl_ops->setpgtccfgtx(netdev,
644 i - DCB_PG_ATTR_TC_0,
645 prio, pgid, tc_pct, up_map);
646 }
647 }
648
649 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
650 if (!pg_tb[i])
651 continue;
652
653 tc_pct = nla_get_u8(pg_tb[i]);
654
655 /* dir: Tx = 0, Rx = 1 */
656 if (dir) {
657 /* Rx */
658 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
659 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
660 } else {
661 /* Tx */
662 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
663 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
664 }
665 }
666
667 ret = dcbnl_reply(0, RTM_SETDCB,
668 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
669 DCB_ATTR_PG_CFG, pid, seq, flags);
670
671err:
672 return ret;
673}
674
675static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
676 u32 pid, u32 seq, u16 flags)
677{
678 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
679}
680
681static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
682 u32 pid, u32 seq, u16 flags)
683{
684 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
685}
686
687static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
688{
689 struct net *net = sock_net(skb->sk);
690 struct net_device *netdev;
691 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
692 struct nlattr *tb[DCB_ATTR_MAX + 1];
693 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
694 int ret = -EINVAL;
695
696 if (net != &init_net)
697 return -EINVAL;
698
699 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
700 dcbnl_rtnl_policy);
701 if (ret < 0)
702 return ret;
703
704 if (!tb[DCB_ATTR_IFNAME])
705 return -EINVAL;
706
707 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
708 if (!netdev)
709 return -EINVAL;
710
711 if (!netdev->dcbnl_ops)
712 goto errout;
713
714 switch (dcb->cmd) {
715 case DCB_CMD_GSTATE:
716 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
717 nlh->nlmsg_flags);
718 goto out;
719 case DCB_CMD_PFC_GCFG:
720 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
721 nlh->nlmsg_flags);
722 goto out;
723 case DCB_CMD_GPERM_HWADDR:
724 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
725 nlh->nlmsg_flags);
726 goto out;
727 case DCB_CMD_PGTX_GCFG:
728 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
729 nlh->nlmsg_flags);
730 goto out;
731 case DCB_CMD_PGRX_GCFG:
732 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
733 nlh->nlmsg_flags);
734 goto out;
735 case DCB_CMD_SSTATE:
736 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
737 nlh->nlmsg_flags);
738 goto out;
739 case DCB_CMD_PFC_SCFG:
740 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
741 nlh->nlmsg_flags);
742 goto out;
743
744 case DCB_CMD_SET_ALL:
745 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
746 nlh->nlmsg_flags);
747 goto out;
748 case DCB_CMD_PGTX_SCFG:
749 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
750 nlh->nlmsg_flags);
751 goto out;
752 case DCB_CMD_PGRX_SCFG:
753 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
754 nlh->nlmsg_flags);
755 goto out;
46132188
AD		 756 case DCB_CMD_GCAP:
757 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
758 nlh->nlmsg_flags);
759 goto out;
2f90b865
AD		 760 default:
761 goto errout;
762 }
763errout:
764 ret = -EINVAL;
765out:
766 dev_put(netdev);
767 return ret;
768}
769
770static int __init dcbnl_init(void)
771{
772 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
773 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
774
775 return 0;
776}
777module_init(dcbnl_init);
778
779static void __exit dcbnl_exit(void)
780{
781 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
782 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
783}
784module_exit(dcbnl_exit);
785
786
kernel source for telekom puls (alcatel/mediatek)