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1/*
2 * Copyright (c) 2008-2011, 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 <linux/slab.h>
23#include <net/netlink.h>
24#include <net/rtnetlink.h>
25#include <linux/dcbnl.h>
26#include <net/dcbevent.h>
27#include <linux/rtnetlink.h>
28#include <net/sock.h>
29
30/**
31 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
32 * intended to allow network traffic with differing requirements
33 * (highly reliable, no drops vs. best effort vs. low latency) to operate
34 * and co-exist on Ethernet. Current DCB features are:
35 *
36 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
37 * framework for assigning bandwidth guarantees to traffic classes.
38 *
39 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
40 * can work independently for each 802.1p priority.
41 *
42 * Congestion Notification - provides a mechanism for end-to-end congestion
43 * control for protocols which do not have built-in congestion management.
44 *
45 * More information about the emerging standards for these Ethernet features
46 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
47 *
48 * This file implements an rtnetlink interface to allow configuration of DCB
49 * features for capable devices.
50 */
51
52MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
53MODULE_DESCRIPTION("Data Center Bridging netlink interface");
54MODULE_LICENSE("GPL");
55
56/**************** DCB attribute policies *************************************/
57
58/* DCB netlink attributes policy */
59static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
60 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
61 [DCB_ATTR_STATE] = {.type = NLA_U8},
62 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
63 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
64 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
65 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
66 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
67 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
68 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
69 [DCB_ATTR_APP] = {.type = NLA_NESTED},
70 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
71 [DCB_ATTR_DCBX] = {.type = NLA_U8},
72 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
73};
74
75/* DCB priority flow control to User Priority nested attributes */
76static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
77 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
85 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
86};
87
88/* DCB priority grouping nested attributes */
89static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
90 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
99 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
107 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
108};
109
110/* DCB traffic class nested attributes. */
111static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
112 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
113 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
116 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
117};
118
119/* DCB capabilities nested attributes. */
120static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
121 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
122 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
123 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
129 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
130};
131
132/* DCB capabilities nested attributes. */
133static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
134 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
135 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
136 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
137};
138
139/* DCB BCN nested attributes. */
140static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
141 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
149 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
150 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
165 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
166};
167
168/* DCB APP nested attributes. */
169static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
170 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
171 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
172 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
173};
174
175/* IEEE 802.1Qaz nested attributes. */
176static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
177 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
178 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
179 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
180};
181
182static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
183 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
184};
185
186/* DCB number of traffic classes nested attributes. */
187static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
188 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
189 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
190 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
191 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
192};
193
194static LIST_HEAD(dcb_app_list);
195static DEFINE_SPINLOCK(dcb_lock);
196
197/* standard netlink reply call */
198static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
199 u32 seq, u16 flags)
200{
201 struct sk_buff *dcbnl_skb;
202 struct dcbmsg *dcb;
203 struct nlmsghdr *nlh;
204 int ret = -EINVAL;
205
206 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
207 if (!dcbnl_skb)
208 return ret;
209
210 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
211
212 dcb = NLMSG_DATA(nlh);
213 dcb->dcb_family = AF_UNSPEC;
214 dcb->cmd = cmd;
215 dcb->dcb_pad = 0;
216
217 ret = nla_put_u8(dcbnl_skb, attr, value);
218 if (ret)
219 goto err;
220
221 /* end the message, assign the nlmsg_len. */
222 nlmsg_end(dcbnl_skb, nlh);
223 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
224 if (ret)
225 return -EINVAL;
226
227 return 0;
228nlmsg_failure:
229err:
230 kfree_skb(dcbnl_skb);
231 return ret;
232}
233
234static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
235 u32 pid, u32 seq, u16 flags)
236{
237 int ret = -EINVAL;
238
239 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
240 if (!netdev->dcbnl_ops->getstate)
241 return ret;
242
243 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
244 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
245
246 return ret;
247}
248
249static int dcbnl_getpfccfg(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 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
256 u8 value;
257 int ret = -EINVAL;
258 int i;
259 int getall = 0;
260
261 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
262 return ret;
263
264 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
265 tb[DCB_ATTR_PFC_CFG],
266 dcbnl_pfc_up_nest);
267 if (ret)
268 goto err_out;
269
270 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
271 if (!dcbnl_skb)
272 goto err_out;
273
274 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
275
276 dcb = NLMSG_DATA(nlh);
277 dcb->dcb_family = AF_UNSPEC;
278 dcb->cmd = DCB_CMD_PFC_GCFG;
279
280 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
281 if (!nest)
282 goto err;
283
284 if (data[DCB_PFC_UP_ATTR_ALL])
285 getall = 1;
286
287 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
288 if (!getall && !data[i])
289 continue;
290
291 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
292 &value);
293 ret = nla_put_u8(dcbnl_skb, i, value);
294
295 if (ret) {
296 nla_nest_cancel(dcbnl_skb, nest);
297 goto err;
298 }
299 }
300 nla_nest_end(dcbnl_skb, nest);
301
302 nlmsg_end(dcbnl_skb, nlh);
303
304 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
305 if (ret)
306 goto err_out;
307
308 return 0;
309nlmsg_failure:
310err:
311 kfree_skb(dcbnl_skb);
312err_out:
313 return -EINVAL;
314}
315
316static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
317 u32 pid, u32 seq, u16 flags)
318{
319 struct sk_buff *dcbnl_skb;
320 struct nlmsghdr *nlh;
321 struct dcbmsg *dcb;
322 u8 perm_addr[MAX_ADDR_LEN];
323 int ret = -EINVAL;
324
325 if (!netdev->dcbnl_ops->getpermhwaddr)
326 return ret;
327
328 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
329 if (!dcbnl_skb)
330 goto err_out;
331
332 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
333
334 dcb = NLMSG_DATA(nlh);
335 dcb->dcb_family = AF_UNSPEC;
336 dcb->cmd = DCB_CMD_GPERM_HWADDR;
337
338 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
339
340 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
341 perm_addr);
342
343 nlmsg_end(dcbnl_skb, nlh);
344
345 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
346 if (ret)
347 goto err_out;
348
349 return 0;
350
351nlmsg_failure:
352 kfree_skb(dcbnl_skb);
353err_out:
354 return -EINVAL;
355}
356
357static int dcbnl_getcap(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_CAP_ATTR_MAX + 1], *nest;
364 u8 value;
365 int ret = -EINVAL;
366 int i;
367 int getall = 0;
368
369 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
370 return ret;
371
372 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
373 dcbnl_cap_nest);
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 = DCB_CMD_GCAP;
386
387 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
388 if (!nest)
389 goto err;
390
391 if (data[DCB_CAP_ATTR_ALL])
392 getall = 1;
393
394 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
395 if (!getall && !data[i])
396 continue;
397
398 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
399 ret = nla_put_u8(dcbnl_skb, i, value);
400
401 if (ret) {
402 nla_nest_cancel(dcbnl_skb, nest);
403 goto err;
404 }
405 }
406 }
407 nla_nest_end(dcbnl_skb, nest);
408
409 nlmsg_end(dcbnl_skb, nlh);
410
411 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
412 if (ret)
413 goto err_out;
414
415 return 0;
416nlmsg_failure:
417err:
418 kfree_skb(dcbnl_skb);
419err_out:
420 return -EINVAL;
421}
422
423static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
424 u32 pid, u32 seq, u16 flags)
425{
426 struct sk_buff *dcbnl_skb;
427 struct nlmsghdr *nlh;
428 struct dcbmsg *dcb;
429 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
430 u8 value;
431 int ret = -EINVAL;
432 int i;
433 int getall = 0;
434
435 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
436 return ret;
437
438 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
439 dcbnl_numtcs_nest);
440 if (ret) {
441 ret = -EINVAL;
442 goto err_out;
443 }
444
445 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
446 if (!dcbnl_skb) {
447 ret = -EINVAL;
448 goto err_out;
449 }
450
451 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
452
453 dcb = NLMSG_DATA(nlh);
454 dcb->dcb_family = AF_UNSPEC;
455 dcb->cmd = DCB_CMD_GNUMTCS;
456
457 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
458 if (!nest) {
459 ret = -EINVAL;
460 goto err;
461 }
462
463 if (data[DCB_NUMTCS_ATTR_ALL])
464 getall = 1;
465
466 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
467 if (!getall && !data[i])
468 continue;
469
470 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
471 if (!ret) {
472 ret = nla_put_u8(dcbnl_skb, i, value);
473
474 if (ret) {
475 nla_nest_cancel(dcbnl_skb, nest);
476 ret = -EINVAL;
477 goto err;
478 }
479 } else {
480 goto err;
481 }
482 }
483 nla_nest_end(dcbnl_skb, nest);
484
485 nlmsg_end(dcbnl_skb, nlh);
486
487 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
488 if (ret) {
489 ret = -EINVAL;
490 goto err_out;
491 }
492
493 return 0;
494nlmsg_failure:
495err:
496 kfree_skb(dcbnl_skb);
497err_out:
498 return ret;
499}
500
501static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
502 u32 pid, u32 seq, u16 flags)
503{
504 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
505 int ret = -EINVAL;
506 u8 value;
507 int i;
508
509 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
510 return ret;
511
512 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
513 dcbnl_numtcs_nest);
514
515 if (ret) {
516 ret = -EINVAL;
517 goto err;
518 }
519
520 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
521 if (data[i] == NULL)
522 continue;
523
524 value = nla_get_u8(data[i]);
525
526 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
527
528 if (ret)
529 goto operr;
530 }
531
532operr:
533 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
534 DCB_ATTR_NUMTCS, pid, seq, flags);
535
536err:
537 return ret;
538}
539
540static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
541 u32 pid, u32 seq, u16 flags)
542{
543 int ret = -EINVAL;
544
545 if (!netdev->dcbnl_ops->getpfcstate)
546 return ret;
547
548 ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
549 DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
550 pid, seq, flags);
551
552 return ret;
553}
554
555static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
556 u32 pid, u32 seq, u16 flags)
557{
558 int ret = -EINVAL;
559 u8 value;
560
561 if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
562 return ret;
563
564 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
565
566 netdev->dcbnl_ops->setpfcstate(netdev, value);
567
568 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
569 pid, seq, flags);
570
571 return ret;
572}
573
574static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
575 u32 pid, u32 seq, u16 flags)
576{
577 struct sk_buff *dcbnl_skb;
578 struct nlmsghdr *nlh;
579 struct dcbmsg *dcb;
580 struct nlattr *app_nest;
581 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
582 u16 id;
583 u8 up, idtype;
584 int ret = -EINVAL;
585
586 if (!tb[DCB_ATTR_APP])
587 goto out;
588
589 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
590 dcbnl_app_nest);
591 if (ret)
592 goto out;
593
594 ret = -EINVAL;
595 /* all must be non-null */
596 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
597 (!app_tb[DCB_APP_ATTR_ID]))
598 goto out;
599
600 /* either by eth type or by socket number */
601 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
602 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
603 (idtype != DCB_APP_IDTYPE_PORTNUM))
604 goto out;
605
606 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
607
608 if (netdev->dcbnl_ops->getapp) {
609 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
610 } else {
611 struct dcb_app app = {
612 .selector = idtype,
613 .protocol = id,
614 };
615 up = dcb_getapp(netdev, &app);
616 }
617
618 /* send this back */
619 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
620 if (!dcbnl_skb)
621 goto out;
622
623 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
624 dcb = NLMSG_DATA(nlh);
625 dcb->dcb_family = AF_UNSPEC;
626 dcb->cmd = DCB_CMD_GAPP;
627
628 app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
629 if (!app_nest)
630 goto out_cancel;
631
632 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
633 if (ret)
634 goto out_cancel;
635
636 ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
637 if (ret)
638 goto out_cancel;
639
640 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
641 if (ret)
642 goto out_cancel;
643
644 nla_nest_end(dcbnl_skb, app_nest);
645 nlmsg_end(dcbnl_skb, nlh);
646
647 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
648 if (ret)
649 goto nlmsg_failure;
650
651 goto out;
652
653out_cancel:
654 nla_nest_cancel(dcbnl_skb, app_nest);
655nlmsg_failure:
656 kfree_skb(dcbnl_skb);
657out:
658 return ret;
659}
660
661static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
662 u32 pid, u32 seq, u16 flags)
663{
664 int err, ret = -EINVAL;
665 u16 id;
666 u8 up, idtype;
667 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
668
669 if (!tb[DCB_ATTR_APP])
670 goto out;
671
672 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
673 dcbnl_app_nest);
674 if (ret)
675 goto out;
676
677 ret = -EINVAL;
678 /* all must be non-null */
679 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
680 (!app_tb[DCB_APP_ATTR_ID]) ||
681 (!app_tb[DCB_APP_ATTR_PRIORITY]))
682 goto out;
683
684 /* either by eth type or by socket number */
685 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
686 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
687 (idtype != DCB_APP_IDTYPE_PORTNUM))
688 goto out;
689
690 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
691 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
692
693 if (netdev->dcbnl_ops->setapp) {
694 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
695 } else {
696 struct dcb_app app;
697 app.selector = idtype;
698 app.protocol = id;
699 app.priority = up;
700 err = dcb_setapp(netdev, &app);
701 }
702
703 ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
704 pid, seq, flags);
705out:
706 return ret;
707}
708
709static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
710 u32 pid, u32 seq, u16 flags, int dir)
711{
712 struct sk_buff *dcbnl_skb;
713 struct nlmsghdr *nlh;
714 struct dcbmsg *dcb;
715 struct nlattr *pg_nest, *param_nest, *data;
716 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
717 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
718 u8 prio, pgid, tc_pct, up_map;
719 int ret = -EINVAL;
720 int getall = 0;
721 int i;
722
723 if (!tb[DCB_ATTR_PG_CFG] ||
724 !netdev->dcbnl_ops->getpgtccfgtx ||
725 !netdev->dcbnl_ops->getpgtccfgrx ||
726 !netdev->dcbnl_ops->getpgbwgcfgtx ||
727 !netdev->dcbnl_ops->getpgbwgcfgrx)
728 return ret;
729
730 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
731 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
732
733 if (ret)
734 goto err_out;
735
736 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
737 if (!dcbnl_skb)
738 goto err_out;
739
740 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
741
742 dcb = NLMSG_DATA(nlh);
743 dcb->dcb_family = AF_UNSPEC;
744 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
745
746 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
747 if (!pg_nest)
748 goto err;
749
750 if (pg_tb[DCB_PG_ATTR_TC_ALL])
751 getall = 1;
752
753 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
754 if (!getall && !pg_tb[i])
755 continue;
756
757 if (pg_tb[DCB_PG_ATTR_TC_ALL])
758 data = pg_tb[DCB_PG_ATTR_TC_ALL];
759 else
760 data = pg_tb[i];
761 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
762 data, dcbnl_tc_param_nest);
763 if (ret)
764 goto err_pg;
765
766 param_nest = nla_nest_start(dcbnl_skb, i);
767 if (!param_nest)
768 goto err_pg;
769
770 pgid = DCB_ATTR_VALUE_UNDEFINED;
771 prio = DCB_ATTR_VALUE_UNDEFINED;
772 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
773 up_map = DCB_ATTR_VALUE_UNDEFINED;
774
775 if (dir) {
776 /* Rx */
777 netdev->dcbnl_ops->getpgtccfgrx(netdev,
778 i - DCB_PG_ATTR_TC_0, &prio,
779 &pgid, &tc_pct, &up_map);
780 } else {
781 /* Tx */
782 netdev->dcbnl_ops->getpgtccfgtx(netdev,
783 i - DCB_PG_ATTR_TC_0, &prio,
784 &pgid, &tc_pct, &up_map);
785 }
786
787 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
788 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
789 ret = nla_put_u8(dcbnl_skb,
790 DCB_TC_ATTR_PARAM_PGID, pgid);
791 if (ret)
792 goto err_param;
793 }
794 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
795 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
796 ret = nla_put_u8(dcbnl_skb,
797 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
798 if (ret)
799 goto err_param;
800 }
801 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
802 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
803 ret = nla_put_u8(dcbnl_skb,
804 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
805 if (ret)
806 goto err_param;
807 }
808 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
809 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
810 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
811 tc_pct);
812 if (ret)
813 goto err_param;
814 }
815 nla_nest_end(dcbnl_skb, param_nest);
816 }
817
818 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
819 getall = 1;
820 else
821 getall = 0;
822
823 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
824 if (!getall && !pg_tb[i])
825 continue;
826
827 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
828
829 if (dir) {
830 /* Rx */
831 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
832 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
833 } else {
834 /* Tx */
835 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
836 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
837 }
838 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
839
840 if (ret)
841 goto err_pg;
842 }
843
844 nla_nest_end(dcbnl_skb, pg_nest);
845
846 nlmsg_end(dcbnl_skb, nlh);
847
848 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
849 if (ret)
850 goto err_out;
851
852 return 0;
853
854err_param:
855 nla_nest_cancel(dcbnl_skb, param_nest);
856err_pg:
857 nla_nest_cancel(dcbnl_skb, pg_nest);
858nlmsg_failure:
859err:
860 kfree_skb(dcbnl_skb);
861err_out:
862 ret = -EINVAL;
863 return ret;
864}
865
866static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
867 u32 pid, u32 seq, u16 flags)
868{
869 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
870}
871
872static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
873 u32 pid, u32 seq, u16 flags)
874{
875 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
876}
877
878static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
879 u32 pid, u32 seq, u16 flags)
880{
881 int ret = -EINVAL;
882 u8 value;
883
884 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
885 return ret;
886
887 value = nla_get_u8(tb[DCB_ATTR_STATE]);
888
889 ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
890 RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
891 pid, seq, flags);
892
893 return ret;
894}
895
896static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
897 u32 pid, u32 seq, u16 flags)
898{
899 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
900 int i;
901 int ret = -EINVAL;
902 u8 value;
903
904 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
905 return ret;
906
907 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
908 tb[DCB_ATTR_PFC_CFG],
909 dcbnl_pfc_up_nest);
910 if (ret)
911 goto err;
912
913 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
914 if (data[i] == NULL)
915 continue;
916 value = nla_get_u8(data[i]);
917 netdev->dcbnl_ops->setpfccfg(netdev,
918 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
919 }
920
921 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
922 pid, seq, flags);
923err:
924 return ret;
925}
926
927static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
928 u32 pid, u32 seq, u16 flags)
929{
930 int ret = -EINVAL;
931
932 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
933 return ret;
934
935 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
936 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
937
938 return ret;
939}
940
941static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
942 u32 pid, u32 seq, u16 flags, int dir)
943{
944 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
945 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
946 int ret = -EINVAL;
947 int i;
948 u8 pgid;
949 u8 up_map;
950 u8 prio;
951 u8 tc_pct;
952
953 if (!tb[DCB_ATTR_PG_CFG] ||
954 !netdev->dcbnl_ops->setpgtccfgtx ||
955 !netdev->dcbnl_ops->setpgtccfgrx ||
956 !netdev->dcbnl_ops->setpgbwgcfgtx ||
957 !netdev->dcbnl_ops->setpgbwgcfgrx)
958 return ret;
959
960 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
961 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
962 if (ret)
963 goto err;
964
965 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
966 if (!pg_tb[i])
967 continue;
968
969 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
970 pg_tb[i], dcbnl_tc_param_nest);
971 if (ret)
972 goto err;
973
974 pgid = DCB_ATTR_VALUE_UNDEFINED;
975 prio = DCB_ATTR_VALUE_UNDEFINED;
976 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
977 up_map = DCB_ATTR_VALUE_UNDEFINED;
978
979 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
980 prio =
981 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
982
983 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
984 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
985
986 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
987 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
988
989 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
990 up_map =
991 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
992
993 /* dir: Tx = 0, Rx = 1 */
994 if (dir) {
995 /* Rx */
996 netdev->dcbnl_ops->setpgtccfgrx(netdev,
997 i - DCB_PG_ATTR_TC_0,
998 prio, pgid, tc_pct, up_map);
999 } else {
1000 /* Tx */
1001 netdev->dcbnl_ops->setpgtccfgtx(netdev,
1002 i - DCB_PG_ATTR_TC_0,
1003 prio, pgid, tc_pct, up_map);
1004 }
1005 }
1006
1007 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1008 if (!pg_tb[i])
1009 continue;
1010
1011 tc_pct = nla_get_u8(pg_tb[i]);
1012
1013 /* dir: Tx = 0, Rx = 1 */
1014 if (dir) {
1015 /* Rx */
1016 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1017 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1018 } else {
1019 /* Tx */
1020 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1021 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1022 }
1023 }
1024
1025 ret = dcbnl_reply(0, RTM_SETDCB,
1026 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1027 DCB_ATTR_PG_CFG, pid, seq, flags);
1028
1029err:
1030 return ret;
1031}
1032
1033static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1034 u32 pid, u32 seq, u16 flags)
1035{
1036 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1037}
1038
1039static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1040 u32 pid, u32 seq, u16 flags)
1041{
1042 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1043}
1044
1045static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1046 u32 pid, u32 seq, u16 flags)
1047{
1048 struct sk_buff *dcbnl_skb;
1049 struct nlmsghdr *nlh;
1050 struct dcbmsg *dcb;
1051 struct nlattr *bcn_nest;
1052 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1053 u8 value_byte;
1054 u32 value_integer;
1055 int ret = -EINVAL;
1056 bool getall = false;
1057 int i;
1058
1059 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1060 !netdev->dcbnl_ops->getbcncfg)
1061 return ret;
1062
1063 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1064 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1065
1066 if (ret)
1067 goto err_out;
1068
1069 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1070 if (!dcbnl_skb)
1071 goto err_out;
1072
1073 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1074
1075 dcb = NLMSG_DATA(nlh);
1076 dcb->dcb_family = AF_UNSPEC;
1077 dcb->cmd = DCB_CMD_BCN_GCFG;
1078
1079 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1080 if (!bcn_nest)
1081 goto err;
1082
1083 if (bcn_tb[DCB_BCN_ATTR_ALL])
1084 getall = true;
1085
1086 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1087 if (!getall && !bcn_tb[i])
1088 continue;
1089
1090 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1091 &value_byte);
1092 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1093 if (ret)
1094 goto err_bcn;
1095 }
1096
1097 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1098 if (!getall && !bcn_tb[i])
1099 continue;
1100
1101 netdev->dcbnl_ops->getbcncfg(netdev, i,
1102 &value_integer);
1103 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1104 if (ret)
1105 goto err_bcn;
1106 }
1107
1108 nla_nest_end(dcbnl_skb, bcn_nest);
1109
1110 nlmsg_end(dcbnl_skb, nlh);
1111
1112 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1113 if (ret)
1114 goto err_out;
1115
1116 return 0;
1117
1118err_bcn:
1119 nla_nest_cancel(dcbnl_skb, bcn_nest);
1120nlmsg_failure:
1121err:
1122 kfree_skb(dcbnl_skb);
1123err_out:
1124 ret = -EINVAL;
1125 return ret;
1126}
1127
1128static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1129 u32 pid, u32 seq, u16 flags)
1130{
1131 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1132 int i;
1133 int ret = -EINVAL;
1134 u8 value_byte;
1135 u32 value_int;
1136
1137 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1138 !netdev->dcbnl_ops->setbcnrp)
1139 return ret;
1140
1141 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1142 tb[DCB_ATTR_BCN],
1143 dcbnl_pfc_up_nest);
1144 if (ret)
1145 goto err;
1146
1147 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1148 if (data[i] == NULL)
1149 continue;
1150 value_byte = nla_get_u8(data[i]);
1151 netdev->dcbnl_ops->setbcnrp(netdev,
1152 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1153 }
1154
1155 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1156 if (data[i] == NULL)
1157 continue;
1158 value_int = nla_get_u32(data[i]);
1159 netdev->dcbnl_ops->setbcncfg(netdev,
1160 i, value_int);
1161 }
1162
1163 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1164 pid, seq, flags);
1165err:
1166 return ret;
1167}
1168
1169static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
1170 int app_nested_type, int app_info_type,
1171 int app_entry_type)
1172{
1173 struct dcb_peer_app_info info;
1174 struct dcb_app *table = NULL;
1175 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1176 u16 app_count;
1177 int err;
1178
1179
1180 /**
1181 * retrieve the peer app configuration form the driver. If the driver
1182 * handlers fail exit without doing anything
1183 */
1184 err = ops->peer_getappinfo(netdev, &info, &app_count);
1185 if (!err && app_count) {
1186 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
1187 if (!table)
1188 return -ENOMEM;
1189
1190 err = ops->peer_getapptable(netdev, table);
1191 }
1192
1193 if (!err) {
1194 u16 i;
1195 struct nlattr *app;
1196
1197 /**
1198 * build the message, from here on the only possible failure
1199 * is due to the skb size
1200 */
1201 err = -EMSGSIZE;
1202
1203 app = nla_nest_start(skb, app_nested_type);
1204 if (!app)
1205 goto nla_put_failure;
1206
1207 if (app_info_type)
1208 NLA_PUT(skb, app_info_type, sizeof(info), &info);
1209
1210 for (i = 0; i < app_count; i++)
1211 NLA_PUT(skb, app_entry_type, sizeof(struct dcb_app),
1212 &table[i]);
1213
1214 nla_nest_end(skb, app);
1215 }
1216 err = 0;
1217
1218nla_put_failure:
1219 kfree(table);
1220 return err;
1221}
1222
1223/* Handle IEEE 802.1Qaz GET commands. */
1224static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1225{
1226 struct nlattr *ieee, *app;
1227 struct dcb_app_type *itr;
1228 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1229 int dcbx;
1230 int err = -EMSGSIZE;
1231
1232 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1233
1234 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1235 if (!ieee)
1236 goto nla_put_failure;
1237
1238 if (ops->ieee_getets) {
1239 struct ieee_ets ets;
1240 err = ops->ieee_getets(netdev, &ets);
1241 if (!err)
1242 NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1243 }
1244
1245 if (ops->ieee_getpfc) {
1246 struct ieee_pfc pfc;
1247 err = ops->ieee_getpfc(netdev, &pfc);
1248 if (!err)
1249 NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1250 }
1251
1252 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1253 if (!app)
1254 goto nla_put_failure;
1255
1256 spin_lock(&dcb_lock);
1257 list_for_each_entry(itr, &dcb_app_list, list) {
1258 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1259 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1260 &itr->app);
1261 if (err) {
1262 spin_unlock(&dcb_lock);
1263 goto nla_put_failure;
1264 }
1265 }
1266 }
1267
1268 if (netdev->dcbnl_ops->getdcbx)
1269 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1270 else
1271 dcbx = -EOPNOTSUPP;
1272
1273 spin_unlock(&dcb_lock);
1274 nla_nest_end(skb, app);
1275
1276 /* get peer info if available */
1277 if (ops->ieee_peer_getets) {
1278 struct ieee_ets ets;
1279 err = ops->ieee_peer_getets(netdev, &ets);
1280 if (!err)
1281 NLA_PUT(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets);
1282 }
1283
1284 if (ops->ieee_peer_getpfc) {
1285 struct ieee_pfc pfc;
1286 err = ops->ieee_peer_getpfc(netdev, &pfc);
1287 if (!err)
1288 NLA_PUT(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc);
1289 }
1290
1291 if (ops->peer_getappinfo && ops->peer_getapptable) {
1292 err = dcbnl_build_peer_app(netdev, skb,
1293 DCB_ATTR_IEEE_PEER_APP,
1294 DCB_ATTR_IEEE_APP_UNSPEC,
1295 DCB_ATTR_IEEE_APP);
1296 if (err)
1297 goto nla_put_failure;
1298 }
1299
1300 nla_nest_end(skb, ieee);
1301 if (dcbx >= 0) {
1302 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1303 if (err)
1304 goto nla_put_failure;
1305 }
1306
1307 return 0;
1308
1309nla_put_failure:
1310 return err;
1311}
1312
1313static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1314 int dir)
1315{
1316 u8 pgid, up_map, prio, tc_pct;
1317 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1318 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1319 struct nlattr *pg = nla_nest_start(skb, i);
1320
1321 if (!pg)
1322 goto nla_put_failure;
1323
1324 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1325 struct nlattr *tc_nest = nla_nest_start(skb, i);
1326
1327 if (!tc_nest)
1328 goto nla_put_failure;
1329
1330 pgid = DCB_ATTR_VALUE_UNDEFINED;
1331 prio = DCB_ATTR_VALUE_UNDEFINED;
1332 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1333 up_map = DCB_ATTR_VALUE_UNDEFINED;
1334
1335 if (!dir)
1336 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1337 &prio, &pgid, &tc_pct, &up_map);
1338 else
1339 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1340 &prio, &pgid, &tc_pct, &up_map);
1341
1342 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_PGID, pgid);
1343 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
1344 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
1345 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct);
1346 nla_nest_end(skb, tc_nest);
1347 }
1348
1349 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1350 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1351
1352 if (!dir)
1353 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1354 &tc_pct);
1355 else
1356 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1357 &tc_pct);
1358 NLA_PUT_U8(skb, i, tc_pct);
1359 }
1360 nla_nest_end(skb, pg);
1361 return 0;
1362
1363nla_put_failure:
1364 return -EMSGSIZE;
1365}
1366
1367static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1368{
1369 struct nlattr *cee, *app;
1370 struct dcb_app_type *itr;
1371 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1372 int dcbx, i, err = -EMSGSIZE;
1373 u8 value;
1374
1375 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1376
1377 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1378 if (!cee)
1379 goto nla_put_failure;
1380
1381 /* local pg */
1382 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1383 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1384 if (err)
1385 goto nla_put_failure;
1386 }
1387
1388 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1389 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1390 if (err)
1391 goto nla_put_failure;
1392 }
1393
1394 /* local pfc */
1395 if (ops->getpfccfg) {
1396 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1397
1398 if (!pfc_nest)
1399 goto nla_put_failure;
1400
1401 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1402 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1403 NLA_PUT_U8(skb, i, value);
1404 }
1405 nla_nest_end(skb, pfc_nest);
1406 }
1407
1408 /* local app */
1409 spin_lock(&dcb_lock);
1410 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1411 if (!app)
1412 goto dcb_unlock;
1413
1414 list_for_each_entry(itr, &dcb_app_list, list) {
1415 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1416 struct nlattr *app_nest = nla_nest_start(skb,
1417 DCB_ATTR_APP);
1418 if (!app_nest)
1419 goto dcb_unlock;
1420
1421 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1422 itr->app.selector);
1423 if (err)
1424 goto dcb_unlock;
1425
1426 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1427 itr->app.protocol);
1428 if (err)
1429 goto dcb_unlock;
1430
1431 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1432 itr->app.priority);
1433 if (err)
1434 goto dcb_unlock;
1435
1436 nla_nest_end(skb, app_nest);
1437 }
1438 }
1439 nla_nest_end(skb, app);
1440
1441 if (netdev->dcbnl_ops->getdcbx)
1442 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1443 else
1444 dcbx = -EOPNOTSUPP;
1445
1446 spin_unlock(&dcb_lock);
1447
1448 /* features flags */
1449 if (ops->getfeatcfg) {
1450 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1451 if (!feat)
1452 goto nla_put_failure;
1453
1454 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1455 i++)
1456 if (!ops->getfeatcfg(netdev, i, &value))
1457 NLA_PUT_U8(skb, i, value);
1458
1459 nla_nest_end(skb, feat);
1460 }
1461
1462 /* peer info if available */
1463 if (ops->cee_peer_getpg) {
1464 struct cee_pg pg;
1465 err = ops->cee_peer_getpg(netdev, &pg);
1466 if (!err)
1467 NLA_PUT(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg);
1468 }
1469
1470 if (ops->cee_peer_getpfc) {
1471 struct cee_pfc pfc;
1472 err = ops->cee_peer_getpfc(netdev, &pfc);
1473 if (!err)
1474 NLA_PUT(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc);
1475 }
1476
1477 if (ops->peer_getappinfo && ops->peer_getapptable) {
1478 err = dcbnl_build_peer_app(netdev, skb,
1479 DCB_ATTR_CEE_PEER_APP_TABLE,
1480 DCB_ATTR_CEE_PEER_APP_INFO,
1481 DCB_ATTR_CEE_PEER_APP);
1482 if (err)
1483 goto nla_put_failure;
1484 }
1485 nla_nest_end(skb, cee);
1486
1487 /* DCBX state */
1488 if (dcbx >= 0) {
1489 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1490 if (err)
1491 goto nla_put_failure;
1492 }
1493 return 0;
1494
1495dcb_unlock:
1496 spin_unlock(&dcb_lock);
1497nla_put_failure:
1498 return err;
1499}
1500
1501static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1502 u32 seq, u32 pid, int dcbx_ver)
1503{
1504 struct net *net = dev_net(dev);
1505 struct sk_buff *skb;
1506 struct nlmsghdr *nlh;
1507 struct dcbmsg *dcb;
1508 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1509 int err;
1510
1511 if (!ops)
1512 return -EOPNOTSUPP;
1513
1514 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1515 if (!skb)
1516 return -ENOBUFS;
1517
1518 nlh = nlmsg_put(skb, pid, 0, event, sizeof(*dcb), 0);
1519 if (nlh == NULL) {
1520 nlmsg_free(skb);
1521 return -EMSGSIZE;
1522 }
1523
1524 dcb = NLMSG_DATA(nlh);
1525 dcb->dcb_family = AF_UNSPEC;
1526 dcb->cmd = cmd;
1527
1528 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1529 err = dcbnl_ieee_fill(skb, dev);
1530 else
1531 err = dcbnl_cee_fill(skb, dev);
1532
1533 if (err < 0) {
1534 /* Report error to broadcast listeners */
1535 nlmsg_cancel(skb, nlh);
1536 kfree_skb(skb);
1537 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1538 } else {
1539 /* End nlmsg and notify broadcast listeners */
1540 nlmsg_end(skb, nlh);
1541 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1542 }
1543
1544 return err;
1545}
1546
1547int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1548 u32 seq, u32 pid)
1549{
1550 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_IEEE);
1551}
1552EXPORT_SYMBOL(dcbnl_ieee_notify);
1553
1554int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1555 u32 seq, u32 pid)
1556{
1557 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_CEE);
1558}
1559EXPORT_SYMBOL(dcbnl_cee_notify);
1560
1561/* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1562 * be completed the entire msg is aborted and error value is returned.
1563 * No attempt is made to reconcile the case where only part of the
1564 * cmd can be completed.
1565 */
1566static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1567 u32 pid, u32 seq, u16 flags)
1568{
1569 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1570 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1571 int err = -EOPNOTSUPP;
1572
1573 if (!ops)
1574 return err;
1575
1576 if (!tb[DCB_ATTR_IEEE])
1577 return -EINVAL;
1578
1579 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1580 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1581 if (err)
1582 return err;
1583
1584 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1585 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1586 err = ops->ieee_setets(netdev, ets);
1587 if (err)
1588 goto err;
1589 }
1590
1591 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1592 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1593 err = ops->ieee_setpfc(netdev, pfc);
1594 if (err)
1595 goto err;
1596 }
1597
1598 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1599 struct nlattr *attr;
1600 int rem;
1601
1602 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1603 struct dcb_app *app_data;
1604 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1605 continue;
1606 app_data = nla_data(attr);
1607 if (ops->ieee_setapp)
1608 err = ops->ieee_setapp(netdev, app_data);
1609 else
1610 err = dcb_ieee_setapp(netdev, app_data);
1611 if (err)
1612 goto err;
1613 }
1614 }
1615
1616err:
1617 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1618 pid, seq, flags);
1619 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1620 return err;
1621}
1622
1623static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1624 u32 pid, u32 seq, u16 flags)
1625{
1626 struct net *net = dev_net(netdev);
1627 struct sk_buff *skb;
1628 struct nlmsghdr *nlh;
1629 struct dcbmsg *dcb;
1630 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1631 int err;
1632
1633 if (!ops)
1634 return -EOPNOTSUPP;
1635
1636 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1637 if (!skb)
1638 return -ENOBUFS;
1639
1640 nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1641 if (nlh == NULL) {
1642 nlmsg_free(skb);
1643 return -EMSGSIZE;
1644 }
1645
1646 dcb = NLMSG_DATA(nlh);
1647 dcb->dcb_family = AF_UNSPEC;
1648 dcb->cmd = DCB_CMD_IEEE_GET;
1649
1650 err = dcbnl_ieee_fill(skb, netdev);
1651
1652 if (err < 0) {
1653 nlmsg_cancel(skb, nlh);
1654 kfree_skb(skb);
1655 } else {
1656 nlmsg_end(skb, nlh);
1657 err = rtnl_unicast(skb, net, pid);
1658 }
1659
1660 return err;
1661}
1662
1663static int dcbnl_ieee_del(struct net_device *netdev, struct nlattr **tb,
1664 u32 pid, u32 seq, u16 flags)
1665{
1666 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1667 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1668 int err = -EOPNOTSUPP;
1669
1670 if (!ops)
1671 return -EOPNOTSUPP;
1672
1673 if (!tb[DCB_ATTR_IEEE])
1674 return -EINVAL;
1675
1676 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1677 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1678 if (err)
1679 return err;
1680
1681 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1682 struct nlattr *attr;
1683 int rem;
1684
1685 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1686 struct dcb_app *app_data;
1687
1688 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1689 continue;
1690 app_data = nla_data(attr);
1691 if (ops->ieee_delapp)
1692 err = ops->ieee_delapp(netdev, app_data);
1693 else
1694 err = dcb_ieee_delapp(netdev, app_data);
1695 if (err)
1696 goto err;
1697 }
1698 }
1699
1700err:
1701 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_DEL, DCB_ATTR_IEEE,
1702 pid, seq, flags);
1703 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1704 return err;
1705}
1706
1707
1708/* DCBX configuration */
1709static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1710 u32 pid, u32 seq, u16 flags)
1711{
1712 int ret;
1713
1714 if (!netdev->dcbnl_ops->getdcbx)
1715 return -EOPNOTSUPP;
1716
1717 ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1718 DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1719
1720 return ret;
1721}
1722
1723static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1724 u32 pid, u32 seq, u16 flags)
1725{
1726 int ret;
1727 u8 value;
1728
1729 if (!netdev->dcbnl_ops->setdcbx)
1730 return -EOPNOTSUPP;
1731
1732 if (!tb[DCB_ATTR_DCBX])
1733 return -EINVAL;
1734
1735 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1736
1737 ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1738 RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1739 pid, seq, flags);
1740
1741 return ret;
1742}
1743
1744static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1745 u32 pid, u32 seq, u16 flags)
1746{
1747 struct sk_buff *dcbnl_skb;
1748 struct nlmsghdr *nlh;
1749 struct dcbmsg *dcb;
1750 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1751 u8 value;
1752 int ret, i;
1753 int getall = 0;
1754
1755 if (!netdev->dcbnl_ops->getfeatcfg)
1756 return -EOPNOTSUPP;
1757
1758 if (!tb[DCB_ATTR_FEATCFG])
1759 return -EINVAL;
1760
1761 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1762 dcbnl_featcfg_nest);
1763 if (ret)
1764 goto err_out;
1765
1766 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1767 if (!dcbnl_skb) {
1768 ret = -ENOBUFS;
1769 goto err_out;
1770 }
1771
1772 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1773
1774 dcb = NLMSG_DATA(nlh);
1775 dcb->dcb_family = AF_UNSPEC;
1776 dcb->cmd = DCB_CMD_GFEATCFG;
1777
1778 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1779 if (!nest) {
1780 ret = -EMSGSIZE;
1781 goto nla_put_failure;
1782 }
1783
1784 if (data[DCB_FEATCFG_ATTR_ALL])
1785 getall = 1;
1786
1787 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1788 if (!getall && !data[i])
1789 continue;
1790
1791 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1792 if (!ret)
1793 ret = nla_put_u8(dcbnl_skb, i, value);
1794
1795 if (ret) {
1796 nla_nest_cancel(dcbnl_skb, nest);
1797 goto nla_put_failure;
1798 }
1799 }
1800 nla_nest_end(dcbnl_skb, nest);
1801
1802 nlmsg_end(dcbnl_skb, nlh);
1803
1804 return rtnl_unicast(dcbnl_skb, &init_net, pid);
1805nla_put_failure:
1806 nlmsg_cancel(dcbnl_skb, nlh);
1807nlmsg_failure:
1808 kfree_skb(dcbnl_skb);
1809err_out:
1810 return ret;
1811}
1812
1813static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1814 u32 pid, u32 seq, u16 flags)
1815{
1816 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1817 int ret, i;
1818 u8 value;
1819
1820 if (!netdev->dcbnl_ops->setfeatcfg)
1821 return -ENOTSUPP;
1822
1823 if (!tb[DCB_ATTR_FEATCFG])
1824 return -EINVAL;
1825
1826 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1827 dcbnl_featcfg_nest);
1828
1829 if (ret)
1830 goto err;
1831
1832 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1833 if (data[i] == NULL)
1834 continue;
1835
1836 value = nla_get_u8(data[i]);
1837
1838 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1839
1840 if (ret)
1841 goto err;
1842 }
1843err:
1844 dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1845 pid, seq, flags);
1846
1847 return ret;
1848}
1849
1850/* Handle CEE DCBX GET commands. */
1851static int dcbnl_cee_get(struct net_device *netdev, struct nlattr **tb,
1852 u32 pid, u32 seq, u16 flags)
1853{
1854 struct net *net = dev_net(netdev);
1855 struct sk_buff *skb;
1856 struct nlmsghdr *nlh;
1857 struct dcbmsg *dcb;
1858 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1859 int err;
1860
1861 if (!ops)
1862 return -EOPNOTSUPP;
1863
1864 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1865 if (!skb)
1866 return -ENOBUFS;
1867
1868 nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1869 if (nlh == NULL) {
1870 nlmsg_free(skb);
1871 return -EMSGSIZE;
1872 }
1873
1874 dcb = NLMSG_DATA(nlh);
1875 dcb->dcb_family = AF_UNSPEC;
1876 dcb->cmd = DCB_CMD_CEE_GET;
1877
1878 err = dcbnl_cee_fill(skb, netdev);
1879
1880 if (err < 0) {
1881 nlmsg_cancel(skb, nlh);
1882 nlmsg_free(skb);
1883 } else {
1884 nlmsg_end(skb, nlh);
1885 err = rtnl_unicast(skb, net, pid);
1886 }
1887 return err;
1888}
1889
1890static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1891{
1892 struct net *net = sock_net(skb->sk);
1893 struct net_device *netdev;
1894 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1895 struct nlattr *tb[DCB_ATTR_MAX + 1];
1896 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1897 int ret = -EINVAL;
1898
1899 if (!net_eq(net, &init_net))
1900 return -EINVAL;
1901
1902 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1903 dcbnl_rtnl_policy);
1904 if (ret < 0)
1905 return ret;
1906
1907 if (!tb[DCB_ATTR_IFNAME])
1908 return -EINVAL;
1909
1910 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1911 if (!netdev)
1912 return -EINVAL;
1913
1914 if (!netdev->dcbnl_ops)
1915 goto errout;
1916
1917 switch (dcb->cmd) {
1918 case DCB_CMD_GSTATE:
1919 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1920 nlh->nlmsg_flags);
1921 goto out;
1922 case DCB_CMD_PFC_GCFG:
1923 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1924 nlh->nlmsg_flags);
1925 goto out;
1926 case DCB_CMD_GPERM_HWADDR:
1927 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1928 nlh->nlmsg_flags);
1929 goto out;
1930 case DCB_CMD_PGTX_GCFG:
1931 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1932 nlh->nlmsg_flags);
1933 goto out;
1934 case DCB_CMD_PGRX_GCFG:
1935 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1936 nlh->nlmsg_flags);
1937 goto out;
1938 case DCB_CMD_BCN_GCFG:
1939 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1940 nlh->nlmsg_flags);
1941 goto out;
1942 case DCB_CMD_SSTATE:
1943 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1944 nlh->nlmsg_flags);
1945 goto out;
1946 case DCB_CMD_PFC_SCFG:
1947 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1948 nlh->nlmsg_flags);
1949 goto out;
1950
1951 case DCB_CMD_SET_ALL:
1952 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1953 nlh->nlmsg_flags);
1954 goto out;
1955 case DCB_CMD_PGTX_SCFG:
1956 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1957 nlh->nlmsg_flags);
1958 goto out;
1959 case DCB_CMD_PGRX_SCFG:
1960 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1961 nlh->nlmsg_flags);
1962 goto out;
1963 case DCB_CMD_GCAP:
1964 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1965 nlh->nlmsg_flags);
1966 goto out;
1967 case DCB_CMD_GNUMTCS:
1968 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1969 nlh->nlmsg_flags);
1970 goto out;
1971 case DCB_CMD_SNUMTCS:
1972 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1973 nlh->nlmsg_flags);
1974 goto out;
1975 case DCB_CMD_PFC_GSTATE:
1976 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1977 nlh->nlmsg_flags);
1978 goto out;
1979 case DCB_CMD_PFC_SSTATE:
1980 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1981 nlh->nlmsg_flags);
1982 goto out;
1983 case DCB_CMD_BCN_SCFG:
1984 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1985 nlh->nlmsg_flags);
1986 goto out;
1987 case DCB_CMD_GAPP:
1988 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1989 nlh->nlmsg_flags);
1990 goto out;
1991 case DCB_CMD_SAPP:
1992 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1993 nlh->nlmsg_flags);
1994 goto out;
1995 case DCB_CMD_IEEE_SET:
1996 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1997 nlh->nlmsg_flags);
1998 goto out;
1999 case DCB_CMD_IEEE_GET:
2000 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
2001 nlh->nlmsg_flags);
2002 goto out;
2003 case DCB_CMD_IEEE_DEL:
2004 ret = dcbnl_ieee_del(netdev, tb, pid, nlh->nlmsg_seq,
2005 nlh->nlmsg_flags);
2006 goto out;
2007 case DCB_CMD_GDCBX:
2008 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
2009 nlh->nlmsg_flags);
2010 goto out;
2011 case DCB_CMD_SDCBX:
2012 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
2013 nlh->nlmsg_flags);
2014 goto out;
2015 case DCB_CMD_GFEATCFG:
2016 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
2017 nlh->nlmsg_flags);
2018 goto out;
2019 case DCB_CMD_SFEATCFG:
2020 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
2021 nlh->nlmsg_flags);
2022 goto out;
2023 case DCB_CMD_CEE_GET:
2024 ret = dcbnl_cee_get(netdev, tb, pid, nlh->nlmsg_seq,
2025 nlh->nlmsg_flags);
2026 goto out;
2027 default:
2028 goto errout;
2029 }
2030errout:
2031 ret = -EINVAL;
2032out:
2033 dev_put(netdev);
2034 return ret;
2035}
2036
2037/**
2038 * dcb_getapp - retrieve the DCBX application user priority
2039 *
2040 * On success returns a non-zero 802.1p user priority bitmap
2041 * otherwise returns 0 as the invalid user priority bitmap to
2042 * indicate an error.
2043 */
2044u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
2045{
2046 struct dcb_app_type *itr;
2047 u8 prio = 0;
2048
2049 spin_lock(&dcb_lock);
2050 list_for_each_entry(itr, &dcb_app_list, list) {
2051 if (itr->app.selector == app->selector &&
2052 itr->app.protocol == app->protocol &&
2053 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2054 prio = itr->app.priority;
2055 break;
2056 }
2057 }
2058 spin_unlock(&dcb_lock);
2059
2060 return prio;
2061}
2062EXPORT_SYMBOL(dcb_getapp);
2063
2064/**
2065 * dcb_setapp - add CEE dcb application data to app list
2066 *
2067 * Priority 0 is an invalid priority in CEE spec. This routine
2068 * removes applications from the app list if the priority is
2069 * set to zero.
2070 */
2071int dcb_setapp(struct net_device *dev, struct dcb_app *new)
2072{
2073 struct dcb_app_type *itr;
2074 struct dcb_app_type event;
2075
2076 memcpy(&event.name, dev->name, sizeof(event.name));
2077 memcpy(&event.app, new, sizeof(event.app));
2078
2079 spin_lock(&dcb_lock);
2080 /* Search for existing match and replace */
2081 list_for_each_entry(itr, &dcb_app_list, list) {
2082 if (itr->app.selector == new->selector &&
2083 itr->app.protocol == new->protocol &&
2084 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2085 if (new->priority)
2086 itr->app.priority = new->priority;
2087 else {
2088 list_del(&itr->list);
2089 kfree(itr);
2090 }
2091 goto out;
2092 }
2093 }
2094 /* App type does not exist add new application type */
2095 if (new->priority) {
2096 struct dcb_app_type *entry;
2097 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
2098 if (!entry) {
2099 spin_unlock(&dcb_lock);
2100 return -ENOMEM;
2101 }
2102
2103 memcpy(&entry->app, new, sizeof(*new));
2104 strncpy(entry->name, dev->name, IFNAMSIZ);
2105 list_add(&entry->list, &dcb_app_list);
2106 }
2107out:
2108 spin_unlock(&dcb_lock);
2109 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2110 return 0;
2111}
2112EXPORT_SYMBOL(dcb_setapp);
2113
2114/**
2115 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
2116 *
2117 * Helper routine which on success returns a non-zero 802.1Qaz user
2118 * priority bitmap otherwise returns 0 to indicate the dcb_app was
2119 * not found in APP list.
2120 */
2121u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
2122{
2123 struct dcb_app_type *itr;
2124 u8 prio = 0;
2125
2126 spin_lock(&dcb_lock);
2127 list_for_each_entry(itr, &dcb_app_list, list) {
2128 if (itr->app.selector == app->selector &&
2129 itr->app.protocol == app->protocol &&
2130 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2131 prio |= 1 << itr->app.priority;
2132 }
2133 }
2134 spin_unlock(&dcb_lock);
2135
2136 return prio;
2137}
2138EXPORT_SYMBOL(dcb_ieee_getapp_mask);
2139
2140/**
2141 * dcb_ieee_setapp - add IEEE dcb application data to app list
2142 *
2143 * This adds Application data to the list. Multiple application
2144 * entries may exists for the same selector and protocol as long
2145 * as the priorities are different.
2146 */
2147int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
2148{
2149 struct dcb_app_type *itr, *entry;
2150 struct dcb_app_type event;
2151 int err = 0;
2152
2153 memcpy(&event.name, dev->name, sizeof(event.name));
2154 memcpy(&event.app, new, sizeof(event.app));
2155
2156 spin_lock(&dcb_lock);
2157 /* Search for existing match and abort if found */
2158 list_for_each_entry(itr, &dcb_app_list, list) {
2159 if (itr->app.selector == new->selector &&
2160 itr->app.protocol == new->protocol &&
2161 itr->app.priority == new->priority &&
2162 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2163 err = -EEXIST;
2164 goto out;
2165 }
2166 }
2167
2168 /* App entry does not exist add new entry */
2169 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
2170 if (!entry) {
2171 err = -ENOMEM;
2172 goto out;
2173 }
2174
2175 memcpy(&entry->app, new, sizeof(*new));
2176 strncpy(entry->name, dev->name, IFNAMSIZ);
2177 list_add(&entry->list, &dcb_app_list);
2178out:
2179 spin_unlock(&dcb_lock);
2180 if (!err)
2181 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2182 return err;
2183}
2184EXPORT_SYMBOL(dcb_ieee_setapp);
2185
2186/**
2187 * dcb_ieee_delapp - delete IEEE dcb application data from list
2188 *
2189 * This removes a matching APP data from the APP list
2190 */
2191int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
2192{
2193 struct dcb_app_type *itr;
2194 struct dcb_app_type event;
2195 int err = -ENOENT;
2196
2197 memcpy(&event.name, dev->name, sizeof(event.name));
2198 memcpy(&event.app, del, sizeof(event.app));
2199
2200 spin_lock(&dcb_lock);
2201 /* Search for existing match and remove it. */
2202 list_for_each_entry(itr, &dcb_app_list, list) {
2203 if (itr->app.selector == del->selector &&
2204 itr->app.protocol == del->protocol &&
2205 itr->app.priority == del->priority &&
2206 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2207 list_del(&itr->list);
2208 kfree(itr);
2209 err = 0;
2210 goto out;
2211 }
2212 }
2213
2214out:
2215 spin_unlock(&dcb_lock);
2216 if (!err)
2217 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2218 return err;
2219}
2220EXPORT_SYMBOL(dcb_ieee_delapp);
2221
2222static void dcb_flushapp(void)
2223{
2224 struct dcb_app_type *app;
2225 struct dcb_app_type *tmp;
2226
2227 spin_lock(&dcb_lock);
2228 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
2229 list_del(&app->list);
2230 kfree(app);
2231 }
2232 spin_unlock(&dcb_lock);
2233}
2234
2235static int __init dcbnl_init(void)
2236{
2237 INIT_LIST_HEAD(&dcb_app_list);
2238
2239 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
2240 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
2241
2242 return 0;
2243}
2244module_init(dcbnl_init);
2245
2246static void __exit dcbnl_exit(void)
2247{
2248 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
2249 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
2250 dcb_flushapp();
2251}
2252module_exit(dcbnl_exit);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2008-2011, Intel Corporation.
4 *
5 * Description: Data Center Bridging netlink interface
6 * Author: Lucy Liu <lucy.liu@intel.com>
7 */
8
9#include <linux/netdevice.h>
10#include <linux/netlink.h>
11#include <linux/slab.h>
12#include <net/netlink.h>
13#include <net/rtnetlink.h>
14#include <linux/dcbnl.h>
15#include <net/dcbevent.h>
16#include <linux/rtnetlink.h>
17#include <linux/init.h>
18#include <net/sock.h>
19
20/* Data Center Bridging (DCB) is a collection of Ethernet enhancements
21 * intended to allow network traffic with differing requirements
22 * (highly reliable, no drops vs. best effort vs. low latency) to operate
23 * and co-exist on Ethernet. Current DCB features are:
24 *
25 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
26 * framework for assigning bandwidth guarantees to traffic classes.
27 *
28 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
29 * can work independently for each 802.1p priority.
30 *
31 * Congestion Notification - provides a mechanism for end-to-end congestion
32 * control for protocols which do not have built-in congestion management.
33 *
34 * More information about the emerging standards for these Ethernet features
35 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
36 *
37 * This file implements an rtnetlink interface to allow configuration of DCB
38 * features for capable devices.
39 */
40
41/**************** DCB attribute policies *************************************/
42
43/* DCB netlink attributes policy */
44static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
45 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
46 [DCB_ATTR_STATE] = {.type = NLA_U8},
47 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
48 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
49 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
50 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
51 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
52 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
53 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
54 [DCB_ATTR_APP] = {.type = NLA_NESTED},
55 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
56 [DCB_ATTR_DCBX] = {.type = NLA_U8},
57 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
58};
59
60/* DCB priority flow control to User Priority nested attributes */
61static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
62 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
63 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
64 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
65 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
66 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
67 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
68 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
69 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
70 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
71};
72
73/* DCB priority grouping nested attributes */
74static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
75 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
76 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
77 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
78 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
79 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
80 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
81 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
82 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
83 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
84 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
85 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
86 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
87 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
88 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
89 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
90 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
91 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
92 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
93};
94
95/* DCB traffic class nested attributes. */
96static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
97 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
98 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
99 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
100 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
101 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
102};
103
104/* DCB capabilities nested attributes. */
105static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
106 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
107 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
108 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
109 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
110 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
111 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
112 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
113 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
114 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
115};
116
117/* DCB capabilities nested attributes. */
118static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
119 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
120 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
121 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
122};
123
124/* DCB BCN nested attributes. */
125static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
126 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
127 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
128 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
129 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
130 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
131 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
132 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
133 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
134 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
135 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
136 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
137 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
138 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
139 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
140 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
141 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
142 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
143 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
144 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
145 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
146 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
147 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
148 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
149 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
150 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
151};
152
153/* DCB APP nested attributes. */
154static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
155 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
156 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
157 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
158};
159
160/* IEEE 802.1Qaz nested attributes. */
161static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
162 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
163 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
164 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
165 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
166 [DCB_ATTR_IEEE_QCN] = {.len = sizeof(struct ieee_qcn)},
167 [DCB_ATTR_IEEE_QCN_STATS] = {.len = sizeof(struct ieee_qcn_stats)},
168 [DCB_ATTR_DCB_BUFFER] = {.len = sizeof(struct dcbnl_buffer)},
169 [DCB_ATTR_DCB_APP_TRUST_TABLE] = {.type = NLA_NESTED},
170};
171
172/* DCB number of traffic classes nested attributes. */
173static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
174 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
175 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
176 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
177 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
178};
179
180static LIST_HEAD(dcb_app_list);
181static LIST_HEAD(dcb_rewr_list);
182static DEFINE_SPINLOCK(dcb_lock);
183
184static enum ieee_attrs_app dcbnl_app_attr_type_get(u8 selector)
185{
186 switch (selector) {
187 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
188 case IEEE_8021QAZ_APP_SEL_STREAM:
189 case IEEE_8021QAZ_APP_SEL_DGRAM:
190 case IEEE_8021QAZ_APP_SEL_ANY:
191 case IEEE_8021QAZ_APP_SEL_DSCP:
192 return DCB_ATTR_IEEE_APP;
193 case DCB_APP_SEL_PCP:
194 return DCB_ATTR_DCB_APP;
195 default:
196 return DCB_ATTR_IEEE_APP_UNSPEC;
197 }
198}
199
200static bool dcbnl_app_attr_type_validate(enum ieee_attrs_app type)
201{
202 switch (type) {
203 case DCB_ATTR_IEEE_APP:
204 case DCB_ATTR_DCB_APP:
205 return true;
206 default:
207 return false;
208 }
209}
210
211static bool dcbnl_app_selector_validate(enum ieee_attrs_app type, u8 selector)
212{
213 return dcbnl_app_attr_type_get(selector) == type;
214}
215
216static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
217 u32 flags, struct nlmsghdr **nlhp)
218{
219 struct sk_buff *skb;
220 struct dcbmsg *dcb;
221 struct nlmsghdr *nlh;
222
223 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
224 if (!skb)
225 return NULL;
226
227 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
228 BUG_ON(!nlh);
229
230 dcb = nlmsg_data(nlh);
231 dcb->dcb_family = AF_UNSPEC;
232 dcb->cmd = cmd;
233 dcb->dcb_pad = 0;
234
235 if (nlhp)
236 *nlhp = nlh;
237
238 return skb;
239}
240
241static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
242 u32 seq, struct nlattr **tb, struct sk_buff *skb)
243{
244 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
245 if (!netdev->dcbnl_ops->getstate)
246 return -EOPNOTSUPP;
247
248 return nla_put_u8(skb, DCB_ATTR_STATE,
249 netdev->dcbnl_ops->getstate(netdev));
250}
251
252static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
253 u32 seq, struct nlattr **tb, struct sk_buff *skb)
254{
255 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
256 u8 value;
257 int ret;
258 int i;
259 int getall = 0;
260
261 if (!tb[DCB_ATTR_PFC_CFG])
262 return -EINVAL;
263
264 if (!netdev->dcbnl_ops->getpfccfg)
265 return -EOPNOTSUPP;
266
267 ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
268 tb[DCB_ATTR_PFC_CFG],
269 dcbnl_pfc_up_nest, NULL);
270 if (ret)
271 return ret;
272
273 nest = nla_nest_start_noflag(skb, DCB_ATTR_PFC_CFG);
274 if (!nest)
275 return -EMSGSIZE;
276
277 if (data[DCB_PFC_UP_ATTR_ALL])
278 getall = 1;
279
280 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
281 if (!getall && !data[i])
282 continue;
283
284 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
285 &value);
286 ret = nla_put_u8(skb, i, value);
287 if (ret) {
288 nla_nest_cancel(skb, nest);
289 return ret;
290 }
291 }
292 nla_nest_end(skb, nest);
293
294 return 0;
295}
296
297static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
298 u32 seq, struct nlattr **tb, struct sk_buff *skb)
299{
300 u8 perm_addr[MAX_ADDR_LEN];
301
302 if (!netdev->dcbnl_ops->getpermhwaddr)
303 return -EOPNOTSUPP;
304
305 memset(perm_addr, 0, sizeof(perm_addr));
306 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
307
308 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
309}
310
311static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
312 u32 seq, struct nlattr **tb, struct sk_buff *skb)
313{
314 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
315 u8 value;
316 int ret;
317 int i;
318 int getall = 0;
319
320 if (!tb[DCB_ATTR_CAP])
321 return -EINVAL;
322
323 if (!netdev->dcbnl_ops->getcap)
324 return -EOPNOTSUPP;
325
326 ret = nla_parse_nested_deprecated(data, DCB_CAP_ATTR_MAX,
327 tb[DCB_ATTR_CAP], dcbnl_cap_nest,
328 NULL);
329 if (ret)
330 return ret;
331
332 nest = nla_nest_start_noflag(skb, DCB_ATTR_CAP);
333 if (!nest)
334 return -EMSGSIZE;
335
336 if (data[DCB_CAP_ATTR_ALL])
337 getall = 1;
338
339 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
340 if (!getall && !data[i])
341 continue;
342
343 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
344 ret = nla_put_u8(skb, i, value);
345 if (ret) {
346 nla_nest_cancel(skb, nest);
347 return ret;
348 }
349 }
350 }
351 nla_nest_end(skb, nest);
352
353 return 0;
354}
355
356static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
357 u32 seq, struct nlattr **tb, struct sk_buff *skb)
358{
359 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
360 u8 value;
361 int ret;
362 int i;
363 int getall = 0;
364
365 if (!tb[DCB_ATTR_NUMTCS])
366 return -EINVAL;
367
368 if (!netdev->dcbnl_ops->getnumtcs)
369 return -EOPNOTSUPP;
370
371 ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
372 tb[DCB_ATTR_NUMTCS],
373 dcbnl_numtcs_nest, NULL);
374 if (ret)
375 return ret;
376
377 nest = nla_nest_start_noflag(skb, DCB_ATTR_NUMTCS);
378 if (!nest)
379 return -EMSGSIZE;
380
381 if (data[DCB_NUMTCS_ATTR_ALL])
382 getall = 1;
383
384 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
385 if (!getall && !data[i])
386 continue;
387
388 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
389 if (!ret) {
390 ret = nla_put_u8(skb, i, value);
391 if (ret) {
392 nla_nest_cancel(skb, nest);
393 return ret;
394 }
395 } else
396 return -EINVAL;
397 }
398 nla_nest_end(skb, nest);
399
400 return 0;
401}
402
403static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
404 u32 seq, struct nlattr **tb, struct sk_buff *skb)
405{
406 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
407 int ret;
408 u8 value;
409 int i;
410
411 if (!tb[DCB_ATTR_NUMTCS])
412 return -EINVAL;
413
414 if (!netdev->dcbnl_ops->setnumtcs)
415 return -EOPNOTSUPP;
416
417 ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
418 tb[DCB_ATTR_NUMTCS],
419 dcbnl_numtcs_nest, NULL);
420 if (ret)
421 return ret;
422
423 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
424 if (data[i] == NULL)
425 continue;
426
427 value = nla_get_u8(data[i]);
428
429 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
430 if (ret)
431 break;
432 }
433
434 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
435}
436
437static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
438 u32 seq, struct nlattr **tb, struct sk_buff *skb)
439{
440 if (!netdev->dcbnl_ops->getpfcstate)
441 return -EOPNOTSUPP;
442
443 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
444 netdev->dcbnl_ops->getpfcstate(netdev));
445}
446
447static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
448 u32 seq, struct nlattr **tb, struct sk_buff *skb)
449{
450 u8 value;
451
452 if (!tb[DCB_ATTR_PFC_STATE])
453 return -EINVAL;
454
455 if (!netdev->dcbnl_ops->setpfcstate)
456 return -EOPNOTSUPP;
457
458 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
459
460 netdev->dcbnl_ops->setpfcstate(netdev, value);
461
462 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
463}
464
465static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
466 u32 seq, struct nlattr **tb, struct sk_buff *skb)
467{
468 struct nlattr *app_nest;
469 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
470 u16 id;
471 u8 up, idtype;
472 int ret;
473
474 if (!tb[DCB_ATTR_APP])
475 return -EINVAL;
476
477 ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
478 tb[DCB_ATTR_APP], dcbnl_app_nest,
479 NULL);
480 if (ret)
481 return ret;
482
483 /* all must be non-null */
484 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
485 (!app_tb[DCB_APP_ATTR_ID]))
486 return -EINVAL;
487
488 /* either by eth type or by socket number */
489 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
490 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
491 (idtype != DCB_APP_IDTYPE_PORTNUM))
492 return -EINVAL;
493
494 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
495
496 if (netdev->dcbnl_ops->getapp) {
497 ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
498 if (ret < 0)
499 return ret;
500 else
501 up = ret;
502 } else {
503 struct dcb_app app = {
504 .selector = idtype,
505 .protocol = id,
506 };
507 up = dcb_getapp(netdev, &app);
508 }
509
510 app_nest = nla_nest_start_noflag(skb, DCB_ATTR_APP);
511 if (!app_nest)
512 return -EMSGSIZE;
513
514 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
515 if (ret)
516 goto out_cancel;
517
518 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
519 if (ret)
520 goto out_cancel;
521
522 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
523 if (ret)
524 goto out_cancel;
525
526 nla_nest_end(skb, app_nest);
527
528 return 0;
529
530out_cancel:
531 nla_nest_cancel(skb, app_nest);
532 return ret;
533}
534
535static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
536 u32 seq, struct nlattr **tb, struct sk_buff *skb)
537{
538 int ret;
539 u16 id;
540 u8 up, idtype;
541 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
542
543 if (!tb[DCB_ATTR_APP])
544 return -EINVAL;
545
546 ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
547 tb[DCB_ATTR_APP], dcbnl_app_nest,
548 NULL);
549 if (ret)
550 return ret;
551
552 /* all must be non-null */
553 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
554 (!app_tb[DCB_APP_ATTR_ID]) ||
555 (!app_tb[DCB_APP_ATTR_PRIORITY]))
556 return -EINVAL;
557
558 /* either by eth type or by socket number */
559 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
560 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
561 (idtype != DCB_APP_IDTYPE_PORTNUM))
562 return -EINVAL;
563
564 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
565 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
566
567 if (netdev->dcbnl_ops->setapp) {
568 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
569 if (ret < 0)
570 return ret;
571 } else {
572 struct dcb_app app;
573 app.selector = idtype;
574 app.protocol = id;
575 app.priority = up;
576 ret = dcb_setapp(netdev, &app);
577 }
578
579 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
580 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
581
582 return ret;
583}
584
585static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
586 struct nlattr **tb, struct sk_buff *skb, int dir)
587{
588 struct nlattr *pg_nest, *param_nest, *data;
589 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
590 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
591 u8 prio, pgid, tc_pct, up_map;
592 int ret;
593 int getall = 0;
594 int i;
595
596 if (!tb[DCB_ATTR_PG_CFG])
597 return -EINVAL;
598
599 if (!netdev->dcbnl_ops->getpgtccfgtx ||
600 !netdev->dcbnl_ops->getpgtccfgrx ||
601 !netdev->dcbnl_ops->getpgbwgcfgtx ||
602 !netdev->dcbnl_ops->getpgbwgcfgrx)
603 return -EOPNOTSUPP;
604
605 ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
606 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
607 NULL);
608 if (ret)
609 return ret;
610
611 pg_nest = nla_nest_start_noflag(skb, DCB_ATTR_PG_CFG);
612 if (!pg_nest)
613 return -EMSGSIZE;
614
615 if (pg_tb[DCB_PG_ATTR_TC_ALL])
616 getall = 1;
617
618 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
619 if (!getall && !pg_tb[i])
620 continue;
621
622 if (pg_tb[DCB_PG_ATTR_TC_ALL])
623 data = pg_tb[DCB_PG_ATTR_TC_ALL];
624 else
625 data = pg_tb[i];
626 ret = nla_parse_nested_deprecated(param_tb,
627 DCB_TC_ATTR_PARAM_MAX, data,
628 dcbnl_tc_param_nest, NULL);
629 if (ret)
630 goto err_pg;
631
632 param_nest = nla_nest_start_noflag(skb, i);
633 if (!param_nest)
634 goto err_pg;
635
636 pgid = DCB_ATTR_VALUE_UNDEFINED;
637 prio = DCB_ATTR_VALUE_UNDEFINED;
638 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
639 up_map = DCB_ATTR_VALUE_UNDEFINED;
640
641 if (dir) {
642 /* Rx */
643 netdev->dcbnl_ops->getpgtccfgrx(netdev,
644 i - DCB_PG_ATTR_TC_0, &prio,
645 &pgid, &tc_pct, &up_map);
646 } else {
647 /* Tx */
648 netdev->dcbnl_ops->getpgtccfgtx(netdev,
649 i - DCB_PG_ATTR_TC_0, &prio,
650 &pgid, &tc_pct, &up_map);
651 }
652
653 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
654 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
655 ret = nla_put_u8(skb,
656 DCB_TC_ATTR_PARAM_PGID, pgid);
657 if (ret)
658 goto err_param;
659 }
660 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
661 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
662 ret = nla_put_u8(skb,
663 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
664 if (ret)
665 goto err_param;
666 }
667 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
668 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
669 ret = nla_put_u8(skb,
670 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
671 if (ret)
672 goto err_param;
673 }
674 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
675 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
676 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
677 tc_pct);
678 if (ret)
679 goto err_param;
680 }
681 nla_nest_end(skb, param_nest);
682 }
683
684 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
685 getall = 1;
686 else
687 getall = 0;
688
689 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
690 if (!getall && !pg_tb[i])
691 continue;
692
693 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
694
695 if (dir) {
696 /* Rx */
697 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
698 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
699 } else {
700 /* Tx */
701 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
702 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
703 }
704 ret = nla_put_u8(skb, i, tc_pct);
705 if (ret)
706 goto err_pg;
707 }
708
709 nla_nest_end(skb, pg_nest);
710
711 return 0;
712
713err_param:
714 nla_nest_cancel(skb, param_nest);
715err_pg:
716 nla_nest_cancel(skb, pg_nest);
717
718 return -EMSGSIZE;
719}
720
721static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
722 u32 seq, struct nlattr **tb, struct sk_buff *skb)
723{
724 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
725}
726
727static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
728 u32 seq, struct nlattr **tb, struct sk_buff *skb)
729{
730 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
731}
732
733static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
734 u32 seq, struct nlattr **tb, struct sk_buff *skb)
735{
736 u8 value;
737
738 if (!tb[DCB_ATTR_STATE])
739 return -EINVAL;
740
741 if (!netdev->dcbnl_ops->setstate)
742 return -EOPNOTSUPP;
743
744 value = nla_get_u8(tb[DCB_ATTR_STATE]);
745
746 return nla_put_u8(skb, DCB_ATTR_STATE,
747 netdev->dcbnl_ops->setstate(netdev, value));
748}
749
750static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
751 u32 seq, struct nlattr **tb, struct sk_buff *skb)
752{
753 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
754 int i;
755 int ret;
756 u8 value;
757
758 if (!tb[DCB_ATTR_PFC_CFG])
759 return -EINVAL;
760
761 if (!netdev->dcbnl_ops->setpfccfg)
762 return -EOPNOTSUPP;
763
764 ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
765 tb[DCB_ATTR_PFC_CFG],
766 dcbnl_pfc_up_nest, NULL);
767 if (ret)
768 return ret;
769
770 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
771 if (data[i] == NULL)
772 continue;
773 value = nla_get_u8(data[i]);
774 netdev->dcbnl_ops->setpfccfg(netdev,
775 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
776 }
777
778 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
779}
780
781static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
782 u32 seq, struct nlattr **tb, struct sk_buff *skb)
783{
784 int ret;
785
786 if (!tb[DCB_ATTR_SET_ALL])
787 return -EINVAL;
788
789 if (!netdev->dcbnl_ops->setall)
790 return -EOPNOTSUPP;
791
792 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
793 netdev->dcbnl_ops->setall(netdev));
794 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
795
796 return ret;
797}
798
799static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
800 u32 seq, struct nlattr **tb, struct sk_buff *skb,
801 int dir)
802{
803 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
804 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
805 int ret;
806 int i;
807 u8 pgid;
808 u8 up_map;
809 u8 prio;
810 u8 tc_pct;
811
812 if (!tb[DCB_ATTR_PG_CFG])
813 return -EINVAL;
814
815 if (!netdev->dcbnl_ops->setpgtccfgtx ||
816 !netdev->dcbnl_ops->setpgtccfgrx ||
817 !netdev->dcbnl_ops->setpgbwgcfgtx ||
818 !netdev->dcbnl_ops->setpgbwgcfgrx)
819 return -EOPNOTSUPP;
820
821 ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
822 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
823 NULL);
824 if (ret)
825 return ret;
826
827 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
828 if (!pg_tb[i])
829 continue;
830
831 ret = nla_parse_nested_deprecated(param_tb,
832 DCB_TC_ATTR_PARAM_MAX,
833 pg_tb[i],
834 dcbnl_tc_param_nest, NULL);
835 if (ret)
836 return ret;
837
838 pgid = DCB_ATTR_VALUE_UNDEFINED;
839 prio = DCB_ATTR_VALUE_UNDEFINED;
840 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
841 up_map = DCB_ATTR_VALUE_UNDEFINED;
842
843 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
844 prio =
845 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
846
847 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
848 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
849
850 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
851 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
852
853 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
854 up_map =
855 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
856
857 /* dir: Tx = 0, Rx = 1 */
858 if (dir) {
859 /* Rx */
860 netdev->dcbnl_ops->setpgtccfgrx(netdev,
861 i - DCB_PG_ATTR_TC_0,
862 prio, pgid, tc_pct, up_map);
863 } else {
864 /* Tx */
865 netdev->dcbnl_ops->setpgtccfgtx(netdev,
866 i - DCB_PG_ATTR_TC_0,
867 prio, pgid, tc_pct, up_map);
868 }
869 }
870
871 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
872 if (!pg_tb[i])
873 continue;
874
875 tc_pct = nla_get_u8(pg_tb[i]);
876
877 /* dir: Tx = 0, Rx = 1 */
878 if (dir) {
879 /* Rx */
880 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
881 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
882 } else {
883 /* Tx */
884 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
885 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
886 }
887 }
888
889 return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
890}
891
892static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
893 u32 seq, struct nlattr **tb, struct sk_buff *skb)
894{
895 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
896}
897
898static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
899 u32 seq, struct nlattr **tb, struct sk_buff *skb)
900{
901 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
902}
903
904static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
905 u32 seq, struct nlattr **tb, struct sk_buff *skb)
906{
907 struct nlattr *bcn_nest;
908 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
909 u8 value_byte;
910 u32 value_integer;
911 int ret;
912 bool getall = false;
913 int i;
914
915 if (!tb[DCB_ATTR_BCN])
916 return -EINVAL;
917
918 if (!netdev->dcbnl_ops->getbcnrp ||
919 !netdev->dcbnl_ops->getbcncfg)
920 return -EOPNOTSUPP;
921
922 ret = nla_parse_nested_deprecated(bcn_tb, DCB_BCN_ATTR_MAX,
923 tb[DCB_ATTR_BCN], dcbnl_bcn_nest,
924 NULL);
925 if (ret)
926 return ret;
927
928 bcn_nest = nla_nest_start_noflag(skb, DCB_ATTR_BCN);
929 if (!bcn_nest)
930 return -EMSGSIZE;
931
932 if (bcn_tb[DCB_BCN_ATTR_ALL])
933 getall = true;
934
935 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
936 if (!getall && !bcn_tb[i])
937 continue;
938
939 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
940 &value_byte);
941 ret = nla_put_u8(skb, i, value_byte);
942 if (ret)
943 goto err_bcn;
944 }
945
946 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
947 if (!getall && !bcn_tb[i])
948 continue;
949
950 netdev->dcbnl_ops->getbcncfg(netdev, i,
951 &value_integer);
952 ret = nla_put_u32(skb, i, value_integer);
953 if (ret)
954 goto err_bcn;
955 }
956
957 nla_nest_end(skb, bcn_nest);
958
959 return 0;
960
961err_bcn:
962 nla_nest_cancel(skb, bcn_nest);
963 return ret;
964}
965
966static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
967 u32 seq, struct nlattr **tb, struct sk_buff *skb)
968{
969 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
970 int i;
971 int ret;
972 u8 value_byte;
973 u32 value_int;
974
975 if (!tb[DCB_ATTR_BCN])
976 return -EINVAL;
977
978 if (!netdev->dcbnl_ops->setbcncfg ||
979 !netdev->dcbnl_ops->setbcnrp)
980 return -EOPNOTSUPP;
981
982 ret = nla_parse_nested_deprecated(data, DCB_BCN_ATTR_MAX,
983 tb[DCB_ATTR_BCN], dcbnl_bcn_nest,
984 NULL);
985 if (ret)
986 return ret;
987
988 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
989 if (data[i] == NULL)
990 continue;
991 value_byte = nla_get_u8(data[i]);
992 netdev->dcbnl_ops->setbcnrp(netdev,
993 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
994 }
995
996 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
997 if (data[i] == NULL)
998 continue;
999 value_int = nla_get_u32(data[i]);
1000 netdev->dcbnl_ops->setbcncfg(netdev,
1001 i, value_int);
1002 }
1003
1004 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
1005}
1006
1007static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
1008 int app_nested_type, int app_info_type,
1009 int app_entry_type)
1010{
1011 struct dcb_peer_app_info info;
1012 struct dcb_app *table = NULL;
1013 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1014 u16 app_count;
1015 int err;
1016
1017
1018 /**
1019 * retrieve the peer app configuration form the driver. If the driver
1020 * handlers fail exit without doing anything
1021 */
1022 err = ops->peer_getappinfo(netdev, &info, &app_count);
1023 if (!err && app_count) {
1024 table = kmalloc_array(app_count, sizeof(struct dcb_app),
1025 GFP_KERNEL);
1026 if (!table)
1027 return -ENOMEM;
1028
1029 err = ops->peer_getapptable(netdev, table);
1030 }
1031
1032 if (!err) {
1033 u16 i;
1034 struct nlattr *app;
1035
1036 /**
1037 * build the message, from here on the only possible failure
1038 * is due to the skb size
1039 */
1040 err = -EMSGSIZE;
1041
1042 app = nla_nest_start_noflag(skb, app_nested_type);
1043 if (!app)
1044 goto nla_put_failure;
1045
1046 if (app_info_type &&
1047 nla_put(skb, app_info_type, sizeof(info), &info))
1048 goto nla_put_failure;
1049
1050 for (i = 0; i < app_count; i++) {
1051 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1052 &table[i]))
1053 goto nla_put_failure;
1054 }
1055 nla_nest_end(skb, app);
1056 }
1057 err = 0;
1058
1059nla_put_failure:
1060 kfree(table);
1061 return err;
1062}
1063
1064static int dcbnl_getapptrust(struct net_device *netdev, struct sk_buff *skb)
1065{
1066 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1067 enum ieee_attrs_app type;
1068 struct nlattr *apptrust;
1069 int nselectors, err, i;
1070 u8 *selectors;
1071
1072 selectors = kzalloc(IEEE_8021QAZ_APP_SEL_MAX + 1, GFP_KERNEL);
1073 if (!selectors)
1074 return -ENOMEM;
1075
1076 err = ops->dcbnl_getapptrust(netdev, selectors, &nselectors);
1077 if (err) {
1078 err = 0;
1079 goto out;
1080 }
1081
1082 apptrust = nla_nest_start(skb, DCB_ATTR_DCB_APP_TRUST_TABLE);
1083 if (!apptrust) {
1084 err = -EMSGSIZE;
1085 goto out;
1086 }
1087
1088 for (i = 0; i < nselectors; i++) {
1089 type = dcbnl_app_attr_type_get(selectors[i]);
1090 err = nla_put_u8(skb, type, selectors[i]);
1091 if (err) {
1092 nla_nest_cancel(skb, apptrust);
1093 goto out;
1094 }
1095 }
1096 nla_nest_end(skb, apptrust);
1097
1098out:
1099 kfree(selectors);
1100 return err;
1101}
1102
1103/* Set or delete APP table or rewrite table entries. The APP struct is validated
1104 * and the appropriate callback function is called.
1105 */
1106static int dcbnl_app_table_setdel(struct nlattr *attr,
1107 struct net_device *netdev,
1108 int (*setdel)(struct net_device *dev,
1109 struct dcb_app *app))
1110{
1111 struct dcb_app *app_data;
1112 enum ieee_attrs_app type;
1113 struct nlattr *attr_itr;
1114 int rem, err;
1115
1116 nla_for_each_nested(attr_itr, attr, rem) {
1117 type = nla_type(attr_itr);
1118
1119 if (!dcbnl_app_attr_type_validate(type))
1120 continue;
1121
1122 if (nla_len(attr_itr) < sizeof(struct dcb_app))
1123 return -ERANGE;
1124
1125 app_data = nla_data(attr_itr);
1126
1127 if (!dcbnl_app_selector_validate(type, app_data->selector))
1128 return -EINVAL;
1129
1130 err = setdel(netdev, app_data);
1131 if (err)
1132 return err;
1133 }
1134
1135 return 0;
1136}
1137
1138/* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */
1139static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1140{
1141 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1142 struct nlattr *ieee, *app, *rewr;
1143 struct dcb_app_type *itr;
1144 int dcbx;
1145 int err;
1146
1147 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1148 return -EMSGSIZE;
1149
1150 ieee = nla_nest_start_noflag(skb, DCB_ATTR_IEEE);
1151 if (!ieee)
1152 return -EMSGSIZE;
1153
1154 if (ops->ieee_getets) {
1155 struct ieee_ets ets;
1156 memset(&ets, 0, sizeof(ets));
1157 err = ops->ieee_getets(netdev, &ets);
1158 if (!err &&
1159 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1160 return -EMSGSIZE;
1161 }
1162
1163 if (ops->ieee_getmaxrate) {
1164 struct ieee_maxrate maxrate;
1165 memset(&maxrate, 0, sizeof(maxrate));
1166 err = ops->ieee_getmaxrate(netdev, &maxrate);
1167 if (!err) {
1168 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1169 sizeof(maxrate), &maxrate);
1170 if (err)
1171 return -EMSGSIZE;
1172 }
1173 }
1174
1175 if (ops->ieee_getqcn) {
1176 struct ieee_qcn qcn;
1177
1178 memset(&qcn, 0, sizeof(qcn));
1179 err = ops->ieee_getqcn(netdev, &qcn);
1180 if (!err) {
1181 err = nla_put(skb, DCB_ATTR_IEEE_QCN,
1182 sizeof(qcn), &qcn);
1183 if (err)
1184 return -EMSGSIZE;
1185 }
1186 }
1187
1188 if (ops->ieee_getqcnstats) {
1189 struct ieee_qcn_stats qcn_stats;
1190
1191 memset(&qcn_stats, 0, sizeof(qcn_stats));
1192 err = ops->ieee_getqcnstats(netdev, &qcn_stats);
1193 if (!err) {
1194 err = nla_put(skb, DCB_ATTR_IEEE_QCN_STATS,
1195 sizeof(qcn_stats), &qcn_stats);
1196 if (err)
1197 return -EMSGSIZE;
1198 }
1199 }
1200
1201 if (ops->ieee_getpfc) {
1202 struct ieee_pfc pfc;
1203 memset(&pfc, 0, sizeof(pfc));
1204 err = ops->ieee_getpfc(netdev, &pfc);
1205 if (!err &&
1206 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1207 return -EMSGSIZE;
1208 }
1209
1210 if (ops->dcbnl_getbuffer) {
1211 struct dcbnl_buffer buffer;
1212
1213 memset(&buffer, 0, sizeof(buffer));
1214 err = ops->dcbnl_getbuffer(netdev, &buffer);
1215 if (!err &&
1216 nla_put(skb, DCB_ATTR_DCB_BUFFER, sizeof(buffer), &buffer))
1217 return -EMSGSIZE;
1218 }
1219
1220 app = nla_nest_start_noflag(skb, DCB_ATTR_IEEE_APP_TABLE);
1221 if (!app)
1222 return -EMSGSIZE;
1223
1224 spin_lock_bh(&dcb_lock);
1225 list_for_each_entry(itr, &dcb_app_list, list) {
1226 if (itr->ifindex == netdev->ifindex) {
1227 enum ieee_attrs_app type =
1228 dcbnl_app_attr_type_get(itr->app.selector);
1229 err = nla_put(skb, type, sizeof(itr->app), &itr->app);
1230 if (err) {
1231 spin_unlock_bh(&dcb_lock);
1232 return -EMSGSIZE;
1233 }
1234 }
1235 }
1236
1237 if (netdev->dcbnl_ops->getdcbx)
1238 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1239 else
1240 dcbx = -EOPNOTSUPP;
1241
1242 spin_unlock_bh(&dcb_lock);
1243 nla_nest_end(skb, app);
1244
1245 rewr = nla_nest_start(skb, DCB_ATTR_DCB_REWR_TABLE);
1246 if (!rewr)
1247 return -EMSGSIZE;
1248
1249 spin_lock_bh(&dcb_lock);
1250 list_for_each_entry(itr, &dcb_rewr_list, list) {
1251 if (itr->ifindex == netdev->ifindex) {
1252 enum ieee_attrs_app type =
1253 dcbnl_app_attr_type_get(itr->app.selector);
1254 err = nla_put(skb, type, sizeof(itr->app), &itr->app);
1255 if (err) {
1256 spin_unlock_bh(&dcb_lock);
1257 nla_nest_cancel(skb, rewr);
1258 return -EMSGSIZE;
1259 }
1260 }
1261 }
1262
1263 spin_unlock_bh(&dcb_lock);
1264 nla_nest_end(skb, rewr);
1265
1266 if (ops->dcbnl_getapptrust) {
1267 err = dcbnl_getapptrust(netdev, skb);
1268 if (err)
1269 return err;
1270 }
1271
1272 /* get peer info if available */
1273 if (ops->ieee_peer_getets) {
1274 struct ieee_ets ets;
1275 memset(&ets, 0, sizeof(ets));
1276 err = ops->ieee_peer_getets(netdev, &ets);
1277 if (!err &&
1278 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1279 return -EMSGSIZE;
1280 }
1281
1282 if (ops->ieee_peer_getpfc) {
1283 struct ieee_pfc pfc;
1284 memset(&pfc, 0, sizeof(pfc));
1285 err = ops->ieee_peer_getpfc(netdev, &pfc);
1286 if (!err &&
1287 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1288 return -EMSGSIZE;
1289 }
1290
1291 if (ops->peer_getappinfo && ops->peer_getapptable) {
1292 err = dcbnl_build_peer_app(netdev, skb,
1293 DCB_ATTR_IEEE_PEER_APP,
1294 DCB_ATTR_IEEE_APP_UNSPEC,
1295 DCB_ATTR_IEEE_APP);
1296 if (err)
1297 return -EMSGSIZE;
1298 }
1299
1300 nla_nest_end(skb, ieee);
1301 if (dcbx >= 0) {
1302 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1303 if (err)
1304 return -EMSGSIZE;
1305 }
1306
1307 return 0;
1308}
1309
1310static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1311 int dir)
1312{
1313 u8 pgid, up_map, prio, tc_pct;
1314 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1315 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1316 struct nlattr *pg = nla_nest_start_noflag(skb, i);
1317
1318 if (!pg)
1319 return -EMSGSIZE;
1320
1321 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1322 struct nlattr *tc_nest = nla_nest_start_noflag(skb, i);
1323
1324 if (!tc_nest)
1325 return -EMSGSIZE;
1326
1327 pgid = DCB_ATTR_VALUE_UNDEFINED;
1328 prio = DCB_ATTR_VALUE_UNDEFINED;
1329 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1330 up_map = DCB_ATTR_VALUE_UNDEFINED;
1331
1332 if (!dir)
1333 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1334 &prio, &pgid, &tc_pct, &up_map);
1335 else
1336 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1337 &prio, &pgid, &tc_pct, &up_map);
1338
1339 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1340 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1341 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1342 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1343 return -EMSGSIZE;
1344 nla_nest_end(skb, tc_nest);
1345 }
1346
1347 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1348 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1349
1350 if (!dir)
1351 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1352 &tc_pct);
1353 else
1354 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1355 &tc_pct);
1356 if (nla_put_u8(skb, i, tc_pct))
1357 return -EMSGSIZE;
1358 }
1359 nla_nest_end(skb, pg);
1360 return 0;
1361}
1362
1363static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1364{
1365 struct nlattr *cee, *app;
1366 struct dcb_app_type *itr;
1367 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1368 int dcbx, i, err = -EMSGSIZE;
1369 u8 value;
1370
1371 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1372 goto nla_put_failure;
1373 cee = nla_nest_start_noflag(skb, DCB_ATTR_CEE);
1374 if (!cee)
1375 goto nla_put_failure;
1376
1377 /* local pg */
1378 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1379 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1380 if (err)
1381 goto nla_put_failure;
1382 }
1383
1384 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1385 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1386 if (err)
1387 goto nla_put_failure;
1388 }
1389
1390 /* local pfc */
1391 if (ops->getpfccfg) {
1392 struct nlattr *pfc_nest = nla_nest_start_noflag(skb,
1393 DCB_ATTR_CEE_PFC);
1394
1395 if (!pfc_nest)
1396 goto nla_put_failure;
1397
1398 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1399 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1400 if (nla_put_u8(skb, i, value))
1401 goto nla_put_failure;
1402 }
1403 nla_nest_end(skb, pfc_nest);
1404 }
1405
1406 /* local app */
1407 spin_lock_bh(&dcb_lock);
1408 app = nla_nest_start_noflag(skb, DCB_ATTR_CEE_APP_TABLE);
1409 if (!app)
1410 goto dcb_unlock;
1411
1412 list_for_each_entry(itr, &dcb_app_list, list) {
1413 if (itr->ifindex == netdev->ifindex) {
1414 struct nlattr *app_nest = nla_nest_start_noflag(skb,
1415 DCB_ATTR_APP);
1416 if (!app_nest)
1417 goto dcb_unlock;
1418
1419 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1420 itr->app.selector);
1421 if (err)
1422 goto dcb_unlock;
1423
1424 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1425 itr->app.protocol);
1426 if (err)
1427 goto dcb_unlock;
1428
1429 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1430 itr->app.priority);
1431 if (err)
1432 goto dcb_unlock;
1433
1434 nla_nest_end(skb, app_nest);
1435 }
1436 }
1437 nla_nest_end(skb, app);
1438
1439 if (netdev->dcbnl_ops->getdcbx)
1440 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1441 else
1442 dcbx = -EOPNOTSUPP;
1443
1444 spin_unlock_bh(&dcb_lock);
1445
1446 /* features flags */
1447 if (ops->getfeatcfg) {
1448 struct nlattr *feat = nla_nest_start_noflag(skb,
1449 DCB_ATTR_CEE_FEAT);
1450 if (!feat)
1451 goto nla_put_failure;
1452
1453 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1454 i++)
1455 if (!ops->getfeatcfg(netdev, i, &value) &&
1456 nla_put_u8(skb, i, value))
1457 goto nla_put_failure;
1458
1459 nla_nest_end(skb, feat);
1460 }
1461
1462 /* peer info if available */
1463 if (ops->cee_peer_getpg) {
1464 struct cee_pg pg;
1465 memset(&pg, 0, sizeof(pg));
1466 err = ops->cee_peer_getpg(netdev, &pg);
1467 if (!err &&
1468 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1469 goto nla_put_failure;
1470 }
1471
1472 if (ops->cee_peer_getpfc) {
1473 struct cee_pfc pfc;
1474 memset(&pfc, 0, sizeof(pfc));
1475 err = ops->cee_peer_getpfc(netdev, &pfc);
1476 if (!err &&
1477 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1478 goto nla_put_failure;
1479 }
1480
1481 if (ops->peer_getappinfo && ops->peer_getapptable) {
1482 err = dcbnl_build_peer_app(netdev, skb,
1483 DCB_ATTR_CEE_PEER_APP_TABLE,
1484 DCB_ATTR_CEE_PEER_APP_INFO,
1485 DCB_ATTR_CEE_PEER_APP);
1486 if (err)
1487 goto nla_put_failure;
1488 }
1489 nla_nest_end(skb, cee);
1490
1491 /* DCBX state */
1492 if (dcbx >= 0) {
1493 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1494 if (err)
1495 goto nla_put_failure;
1496 }
1497 return 0;
1498
1499dcb_unlock:
1500 spin_unlock_bh(&dcb_lock);
1501nla_put_failure:
1502 err = -EMSGSIZE;
1503 return err;
1504}
1505
1506static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1507 u32 seq, u32 portid, int dcbx_ver)
1508{
1509 struct net *net = dev_net(dev);
1510 struct sk_buff *skb;
1511 struct nlmsghdr *nlh;
1512 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1513 int err;
1514
1515 if (!ops)
1516 return -EOPNOTSUPP;
1517
1518 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1519 if (!skb)
1520 return -ENOMEM;
1521
1522 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1523 err = dcbnl_ieee_fill(skb, dev);
1524 else
1525 err = dcbnl_cee_fill(skb, dev);
1526
1527 if (err < 0) {
1528 /* Report error to broadcast listeners */
1529 nlmsg_free(skb);
1530 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1531 } else {
1532 /* End nlmsg and notify broadcast listeners */
1533 nlmsg_end(skb, nlh);
1534 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1535 }
1536
1537 return err;
1538}
1539
1540int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1541 u32 seq, u32 portid)
1542{
1543 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1544}
1545EXPORT_SYMBOL(dcbnl_ieee_notify);
1546
1547int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1548 u32 seq, u32 portid)
1549{
1550 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1551}
1552EXPORT_SYMBOL(dcbnl_cee_notify);
1553
1554/* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb SET commands.
1555 * If any requested operation can not be completed
1556 * the entire msg is aborted and error value is returned.
1557 * No attempt is made to reconcile the case where only part of the
1558 * cmd can be completed.
1559 */
1560static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1561 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1562{
1563 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1564 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1565 int prio;
1566 int err;
1567
1568 if (!ops)
1569 return -EOPNOTSUPP;
1570
1571 if (!tb[DCB_ATTR_IEEE])
1572 return -EINVAL;
1573
1574 err = nla_parse_nested_deprecated(ieee, DCB_ATTR_IEEE_MAX,
1575 tb[DCB_ATTR_IEEE],
1576 dcbnl_ieee_policy, NULL);
1577 if (err)
1578 return err;
1579
1580 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1581 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1582 err = ops->ieee_setets(netdev, ets);
1583 if (err)
1584 goto err;
1585 }
1586
1587 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1588 struct ieee_maxrate *maxrate =
1589 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1590 err = ops->ieee_setmaxrate(netdev, maxrate);
1591 if (err)
1592 goto err;
1593 }
1594
1595 if (ieee[DCB_ATTR_IEEE_QCN] && ops->ieee_setqcn) {
1596 struct ieee_qcn *qcn =
1597 nla_data(ieee[DCB_ATTR_IEEE_QCN]);
1598
1599 err = ops->ieee_setqcn(netdev, qcn);
1600 if (err)
1601 goto err;
1602 }
1603
1604 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1605 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1606 err = ops->ieee_setpfc(netdev, pfc);
1607 if (err)
1608 goto err;
1609 }
1610
1611 if (ieee[DCB_ATTR_DCB_BUFFER] && ops->dcbnl_setbuffer) {
1612 struct dcbnl_buffer *buffer =
1613 nla_data(ieee[DCB_ATTR_DCB_BUFFER]);
1614
1615 for (prio = 0; prio < ARRAY_SIZE(buffer->prio2buffer); prio++) {
1616 if (buffer->prio2buffer[prio] >= DCBX_MAX_BUFFERS) {
1617 err = -EINVAL;
1618 goto err;
1619 }
1620 }
1621
1622 err = ops->dcbnl_setbuffer(netdev, buffer);
1623 if (err)
1624 goto err;
1625 }
1626
1627 if (ieee[DCB_ATTR_DCB_REWR_TABLE]) {
1628 err = dcbnl_app_table_setdel(ieee[DCB_ATTR_DCB_REWR_TABLE],
1629 netdev,
1630 ops->dcbnl_setrewr ?: dcb_setrewr);
1631 if (err)
1632 goto err;
1633 }
1634
1635 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1636 err = dcbnl_app_table_setdel(ieee[DCB_ATTR_IEEE_APP_TABLE],
1637 netdev, ops->ieee_setapp ?:
1638 dcb_ieee_setapp);
1639 if (err)
1640 goto err;
1641 }
1642
1643 if (ieee[DCB_ATTR_DCB_APP_TRUST_TABLE]) {
1644 u8 selectors[IEEE_8021QAZ_APP_SEL_MAX + 1] = {0};
1645 struct nlattr *attr;
1646 int nselectors = 0;
1647 int rem;
1648
1649 if (!ops->dcbnl_setapptrust) {
1650 err = -EOPNOTSUPP;
1651 goto err;
1652 }
1653
1654 nla_for_each_nested(attr, ieee[DCB_ATTR_DCB_APP_TRUST_TABLE],
1655 rem) {
1656 enum ieee_attrs_app type = nla_type(attr);
1657 u8 selector;
1658 int i;
1659
1660 if (!dcbnl_app_attr_type_validate(type) ||
1661 nla_len(attr) != 1 ||
1662 nselectors >= sizeof(selectors)) {
1663 err = -EINVAL;
1664 goto err;
1665 }
1666
1667 selector = nla_get_u8(attr);
1668
1669 if (!dcbnl_app_selector_validate(type, selector)) {
1670 err = -EINVAL;
1671 goto err;
1672 }
1673
1674 /* Duplicate selector ? */
1675 for (i = 0; i < nselectors; i++) {
1676 if (selectors[i] == selector) {
1677 err = -EINVAL;
1678 goto err;
1679 }
1680 }
1681
1682 selectors[nselectors++] = selector;
1683 }
1684
1685 err = ops->dcbnl_setapptrust(netdev, selectors, nselectors);
1686 if (err)
1687 goto err;
1688 }
1689
1690err:
1691 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1692 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1693 return err;
1694}
1695
1696static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1697 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1698{
1699 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1700
1701 if (!ops)
1702 return -EOPNOTSUPP;
1703
1704 return dcbnl_ieee_fill(skb, netdev);
1705}
1706
1707static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1708 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1709{
1710 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1711 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1712 int err;
1713
1714 if (!ops)
1715 return -EOPNOTSUPP;
1716
1717 if (!tb[DCB_ATTR_IEEE])
1718 return -EINVAL;
1719
1720 err = nla_parse_nested_deprecated(ieee, DCB_ATTR_IEEE_MAX,
1721 tb[DCB_ATTR_IEEE],
1722 dcbnl_ieee_policy, NULL);
1723 if (err)
1724 return err;
1725
1726 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1727 err = dcbnl_app_table_setdel(ieee[DCB_ATTR_IEEE_APP_TABLE],
1728 netdev, ops->ieee_delapp ?:
1729 dcb_ieee_delapp);
1730 if (err)
1731 goto err;
1732 }
1733
1734 if (ieee[DCB_ATTR_DCB_REWR_TABLE]) {
1735 err = dcbnl_app_table_setdel(ieee[DCB_ATTR_DCB_REWR_TABLE],
1736 netdev,
1737 ops->dcbnl_delrewr ?: dcb_delrewr);
1738 if (err)
1739 goto err;
1740 }
1741
1742err:
1743 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1744 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1745 return err;
1746}
1747
1748
1749/* DCBX configuration */
1750static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1751 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1752{
1753 if (!netdev->dcbnl_ops->getdcbx)
1754 return -EOPNOTSUPP;
1755
1756 return nla_put_u8(skb, DCB_ATTR_DCBX,
1757 netdev->dcbnl_ops->getdcbx(netdev));
1758}
1759
1760static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1761 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1762{
1763 u8 value;
1764
1765 if (!netdev->dcbnl_ops->setdcbx)
1766 return -EOPNOTSUPP;
1767
1768 if (!tb[DCB_ATTR_DCBX])
1769 return -EINVAL;
1770
1771 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1772
1773 return nla_put_u8(skb, DCB_ATTR_DCBX,
1774 netdev->dcbnl_ops->setdcbx(netdev, value));
1775}
1776
1777static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1778 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1779{
1780 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1781 u8 value;
1782 int ret, i;
1783 int getall = 0;
1784
1785 if (!netdev->dcbnl_ops->getfeatcfg)
1786 return -EOPNOTSUPP;
1787
1788 if (!tb[DCB_ATTR_FEATCFG])
1789 return -EINVAL;
1790
1791 ret = nla_parse_nested_deprecated(data, DCB_FEATCFG_ATTR_MAX,
1792 tb[DCB_ATTR_FEATCFG],
1793 dcbnl_featcfg_nest, NULL);
1794 if (ret)
1795 return ret;
1796
1797 nest = nla_nest_start_noflag(skb, DCB_ATTR_FEATCFG);
1798 if (!nest)
1799 return -EMSGSIZE;
1800
1801 if (data[DCB_FEATCFG_ATTR_ALL])
1802 getall = 1;
1803
1804 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1805 if (!getall && !data[i])
1806 continue;
1807
1808 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1809 if (!ret)
1810 ret = nla_put_u8(skb, i, value);
1811
1812 if (ret) {
1813 nla_nest_cancel(skb, nest);
1814 goto nla_put_failure;
1815 }
1816 }
1817 nla_nest_end(skb, nest);
1818
1819nla_put_failure:
1820 return ret;
1821}
1822
1823static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1824 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1825{
1826 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1827 int ret, i;
1828 u8 value;
1829
1830 if (!netdev->dcbnl_ops->setfeatcfg)
1831 return -ENOTSUPP;
1832
1833 if (!tb[DCB_ATTR_FEATCFG])
1834 return -EINVAL;
1835
1836 ret = nla_parse_nested_deprecated(data, DCB_FEATCFG_ATTR_MAX,
1837 tb[DCB_ATTR_FEATCFG],
1838 dcbnl_featcfg_nest, NULL);
1839
1840 if (ret)
1841 goto err;
1842
1843 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1844 if (data[i] == NULL)
1845 continue;
1846
1847 value = nla_get_u8(data[i]);
1848
1849 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1850
1851 if (ret)
1852 goto err;
1853 }
1854err:
1855 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1856
1857 return ret;
1858}
1859
1860/* Handle CEE DCBX GET commands. */
1861static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1862 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1863{
1864 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1865
1866 if (!ops)
1867 return -EOPNOTSUPP;
1868
1869 return dcbnl_cee_fill(skb, netdev);
1870}
1871
1872struct reply_func {
1873 /* reply netlink message type */
1874 int type;
1875
1876 /* function to fill message contents */
1877 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1878 struct nlattr **, struct sk_buff *);
1879};
1880
1881static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1882 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1883 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1884 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1885 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1886 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1887 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1888 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1889 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1890 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1891 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1892 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1893 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1894 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1895 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1896 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1897 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1898 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1899 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1900 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1901 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1902 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1903 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1904 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1905 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1906 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1907 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1908 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
1909};
1910
1911static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1912 struct netlink_ext_ack *extack)
1913{
1914 struct net *net = sock_net(skb->sk);
1915 struct net_device *netdev;
1916 struct dcbmsg *dcb = nlmsg_data(nlh);
1917 struct nlattr *tb[DCB_ATTR_MAX + 1];
1918 u32 portid = NETLINK_CB(skb).portid;
1919 int ret = -EINVAL;
1920 struct sk_buff *reply_skb;
1921 struct nlmsghdr *reply_nlh = NULL;
1922 const struct reply_func *fn;
1923
1924 if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
1925 return -EPERM;
1926
1927 ret = nlmsg_parse_deprecated(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1928 dcbnl_rtnl_policy, extack);
1929 if (ret < 0)
1930 return ret;
1931
1932 if (dcb->cmd > DCB_CMD_MAX)
1933 return -EINVAL;
1934
1935 /* check if a reply function has been defined for the command */
1936 fn = &reply_funcs[dcb->cmd];
1937 if (!fn->cb)
1938 return -EOPNOTSUPP;
1939 if (fn->type == RTM_SETDCB && !netlink_capable(skb, CAP_NET_ADMIN))
1940 return -EPERM;
1941
1942 if (!tb[DCB_ATTR_IFNAME])
1943 return -EINVAL;
1944
1945 netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1946 if (!netdev)
1947 return -ENODEV;
1948
1949 if (!netdev->dcbnl_ops)
1950 return -EOPNOTSUPP;
1951
1952 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1953 nlh->nlmsg_flags, &reply_nlh);
1954 if (!reply_skb)
1955 return -ENOMEM;
1956
1957 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1958 if (ret < 0) {
1959 nlmsg_free(reply_skb);
1960 goto out;
1961 }
1962
1963 nlmsg_end(reply_skb, reply_nlh);
1964
1965 ret = rtnl_unicast(reply_skb, net, portid);
1966out:
1967 return ret;
1968}
1969
1970static struct dcb_app_type *dcb_rewr_lookup(const struct dcb_app *app,
1971 int ifindex, int proto)
1972{
1973 struct dcb_app_type *itr;
1974
1975 list_for_each_entry(itr, &dcb_rewr_list, list) {
1976 if (itr->app.selector == app->selector &&
1977 itr->app.priority == app->priority &&
1978 itr->ifindex == ifindex &&
1979 ((proto == -1) || itr->app.protocol == proto))
1980 return itr;
1981 }
1982
1983 return NULL;
1984}
1985
1986static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1987 int ifindex, int prio)
1988{
1989 struct dcb_app_type *itr;
1990
1991 list_for_each_entry(itr, &dcb_app_list, list) {
1992 if (itr->app.selector == app->selector &&
1993 itr->app.protocol == app->protocol &&
1994 itr->ifindex == ifindex &&
1995 ((prio == -1) || itr->app.priority == prio))
1996 return itr;
1997 }
1998
1999 return NULL;
2000}
2001
2002static int dcb_app_add(struct list_head *list, const struct dcb_app *app,
2003 int ifindex)
2004{
2005 struct dcb_app_type *entry;
2006
2007 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
2008 if (!entry)
2009 return -ENOMEM;
2010
2011 memcpy(&entry->app, app, sizeof(*app));
2012 entry->ifindex = ifindex;
2013 list_add(&entry->list, list);
2014
2015 return 0;
2016}
2017
2018/**
2019 * dcb_getapp - retrieve the DCBX application user priority
2020 * @dev: network interface
2021 * @app: application to get user priority of
2022 *
2023 * On success returns a non-zero 802.1p user priority bitmap
2024 * otherwise returns 0 as the invalid user priority bitmap to
2025 * indicate an error.
2026 */
2027u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
2028{
2029 struct dcb_app_type *itr;
2030 u8 prio = 0;
2031
2032 spin_lock_bh(&dcb_lock);
2033 itr = dcb_app_lookup(app, dev->ifindex, -1);
2034 if (itr)
2035 prio = itr->app.priority;
2036 spin_unlock_bh(&dcb_lock);
2037
2038 return prio;
2039}
2040EXPORT_SYMBOL(dcb_getapp);
2041
2042/**
2043 * dcb_setapp - add CEE dcb application data to app list
2044 * @dev: network interface
2045 * @new: application data to add
2046 *
2047 * Priority 0 is an invalid priority in CEE spec. This routine
2048 * removes applications from the app list if the priority is
2049 * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap
2050 */
2051int dcb_setapp(struct net_device *dev, struct dcb_app *new)
2052{
2053 struct dcb_app_type *itr;
2054 struct dcb_app_type event;
2055 int err = 0;
2056
2057 event.ifindex = dev->ifindex;
2058 memcpy(&event.app, new, sizeof(event.app));
2059 if (dev->dcbnl_ops->getdcbx)
2060 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
2061
2062 spin_lock_bh(&dcb_lock);
2063 /* Search for existing match and replace */
2064 itr = dcb_app_lookup(new, dev->ifindex, -1);
2065 if (itr) {
2066 if (new->priority)
2067 itr->app.priority = new->priority;
2068 else {
2069 list_del(&itr->list);
2070 kfree(itr);
2071 }
2072 goto out;
2073 }
2074 /* App type does not exist add new application type */
2075 if (new->priority)
2076 err = dcb_app_add(&dcb_app_list, new, dev->ifindex);
2077out:
2078 spin_unlock_bh(&dcb_lock);
2079 if (!err)
2080 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2081 return err;
2082}
2083EXPORT_SYMBOL(dcb_setapp);
2084
2085/**
2086 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
2087 * @dev: network interface
2088 * @app: where to store the retrieve application data
2089 *
2090 * Helper routine which on success returns a non-zero 802.1Qaz user
2091 * priority bitmap otherwise returns 0 to indicate the dcb_app was
2092 * not found in APP list.
2093 */
2094u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
2095{
2096 struct dcb_app_type *itr;
2097 u8 prio = 0;
2098
2099 spin_lock_bh(&dcb_lock);
2100 itr = dcb_app_lookup(app, dev->ifindex, -1);
2101 if (itr)
2102 prio |= 1 << itr->app.priority;
2103 spin_unlock_bh(&dcb_lock);
2104
2105 return prio;
2106}
2107EXPORT_SYMBOL(dcb_ieee_getapp_mask);
2108
2109/* Get protocol value from rewrite entry. */
2110u16 dcb_getrewr(struct net_device *dev, struct dcb_app *app)
2111{
2112 struct dcb_app_type *itr;
2113 u16 proto = 0;
2114
2115 spin_lock_bh(&dcb_lock);
2116 itr = dcb_rewr_lookup(app, dev->ifindex, -1);
2117 if (itr)
2118 proto = itr->app.protocol;
2119 spin_unlock_bh(&dcb_lock);
2120
2121 return proto;
2122}
2123EXPORT_SYMBOL(dcb_getrewr);
2124
2125 /* Add rewrite entry to the rewrite list. */
2126int dcb_setrewr(struct net_device *dev, struct dcb_app *new)
2127{
2128 int err;
2129
2130 spin_lock_bh(&dcb_lock);
2131 /* Search for existing match and abort if found. */
2132 if (dcb_rewr_lookup(new, dev->ifindex, new->protocol)) {
2133 err = -EEXIST;
2134 goto out;
2135 }
2136
2137 err = dcb_app_add(&dcb_rewr_list, new, dev->ifindex);
2138out:
2139 spin_unlock_bh(&dcb_lock);
2140
2141 return err;
2142}
2143EXPORT_SYMBOL(dcb_setrewr);
2144
2145/* Delete rewrite entry from the rewrite list. */
2146int dcb_delrewr(struct net_device *dev, struct dcb_app *del)
2147{
2148 struct dcb_app_type *itr;
2149 int err = -ENOENT;
2150
2151 spin_lock_bh(&dcb_lock);
2152 /* Search for existing match and remove it. */
2153 itr = dcb_rewr_lookup(del, dev->ifindex, del->protocol);
2154 if (itr) {
2155 list_del(&itr->list);
2156 kfree(itr);
2157 err = 0;
2158 }
2159
2160 spin_unlock_bh(&dcb_lock);
2161
2162 return err;
2163}
2164EXPORT_SYMBOL(dcb_delrewr);
2165
2166/**
2167 * dcb_ieee_setapp - add IEEE dcb application data to app list
2168 * @dev: network interface
2169 * @new: application data to add
2170 *
2171 * This adds Application data to the list. Multiple application
2172 * entries may exists for the same selector and protocol as long
2173 * as the priorities are different. Priority is expected to be a
2174 * 3-bit unsigned integer
2175 */
2176int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
2177{
2178 struct dcb_app_type event;
2179 int err = 0;
2180
2181 event.ifindex = dev->ifindex;
2182 memcpy(&event.app, new, sizeof(event.app));
2183 if (dev->dcbnl_ops->getdcbx)
2184 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
2185
2186 spin_lock_bh(&dcb_lock);
2187 /* Search for existing match and abort if found */
2188 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
2189 err = -EEXIST;
2190 goto out;
2191 }
2192
2193 err = dcb_app_add(&dcb_app_list, new, dev->ifindex);
2194out:
2195 spin_unlock_bh(&dcb_lock);
2196 if (!err)
2197 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2198 return err;
2199}
2200EXPORT_SYMBOL(dcb_ieee_setapp);
2201
2202/**
2203 * dcb_ieee_delapp - delete IEEE dcb application data from list
2204 * @dev: network interface
2205 * @del: application data to delete
2206 *
2207 * This removes a matching APP data from the APP list
2208 */
2209int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
2210{
2211 struct dcb_app_type *itr;
2212 struct dcb_app_type event;
2213 int err = -ENOENT;
2214
2215 event.ifindex = dev->ifindex;
2216 memcpy(&event.app, del, sizeof(event.app));
2217 if (dev->dcbnl_ops->getdcbx)
2218 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
2219
2220 spin_lock_bh(&dcb_lock);
2221 /* Search for existing match and remove it. */
2222 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
2223 list_del(&itr->list);
2224 kfree(itr);
2225 err = 0;
2226 }
2227
2228 spin_unlock_bh(&dcb_lock);
2229 if (!err)
2230 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2231 return err;
2232}
2233EXPORT_SYMBOL(dcb_ieee_delapp);
2234
2235/* dcb_getrewr_prio_pcp_mask_map - For a given device, find mapping from
2236 * priorities to the PCP and DEI values assigned to that priority.
2237 */
2238void dcb_getrewr_prio_pcp_mask_map(const struct net_device *dev,
2239 struct dcb_rewr_prio_pcp_map *p_map)
2240{
2241 int ifindex = dev->ifindex;
2242 struct dcb_app_type *itr;
2243 u8 prio;
2244
2245 memset(p_map->map, 0, sizeof(p_map->map));
2246
2247 spin_lock_bh(&dcb_lock);
2248 list_for_each_entry(itr, &dcb_rewr_list, list) {
2249 if (itr->ifindex == ifindex &&
2250 itr->app.selector == DCB_APP_SEL_PCP &&
2251 itr->app.protocol < 16 &&
2252 itr->app.priority < IEEE_8021QAZ_MAX_TCS) {
2253 prio = itr->app.priority;
2254 p_map->map[prio] |= 1 << itr->app.protocol;
2255 }
2256 }
2257 spin_unlock_bh(&dcb_lock);
2258}
2259EXPORT_SYMBOL(dcb_getrewr_prio_pcp_mask_map);
2260
2261/* dcb_getrewr_prio_dscp_mask_map - For a given device, find mapping from
2262 * priorities to the DSCP values assigned to that priority.
2263 */
2264void dcb_getrewr_prio_dscp_mask_map(const struct net_device *dev,
2265 struct dcb_ieee_app_prio_map *p_map)
2266{
2267 int ifindex = dev->ifindex;
2268 struct dcb_app_type *itr;
2269 u8 prio;
2270
2271 memset(p_map->map, 0, sizeof(p_map->map));
2272
2273 spin_lock_bh(&dcb_lock);
2274 list_for_each_entry(itr, &dcb_rewr_list, list) {
2275 if (itr->ifindex == ifindex &&
2276 itr->app.selector == IEEE_8021QAZ_APP_SEL_DSCP &&
2277 itr->app.protocol < 64 &&
2278 itr->app.priority < IEEE_8021QAZ_MAX_TCS) {
2279 prio = itr->app.priority;
2280 p_map->map[prio] |= 1ULL << itr->app.protocol;
2281 }
2282 }
2283 spin_unlock_bh(&dcb_lock);
2284}
2285EXPORT_SYMBOL(dcb_getrewr_prio_dscp_mask_map);
2286
2287/*
2288 * dcb_ieee_getapp_prio_dscp_mask_map - For a given device, find mapping from
2289 * priorities to the DSCP values assigned to that priority. Initialize p_map
2290 * such that each map element holds a bit mask of DSCP values configured for
2291 * that priority by APP entries.
2292 */
2293void dcb_ieee_getapp_prio_dscp_mask_map(const struct net_device *dev,
2294 struct dcb_ieee_app_prio_map *p_map)
2295{
2296 int ifindex = dev->ifindex;
2297 struct dcb_app_type *itr;
2298 u8 prio;
2299
2300 memset(p_map->map, 0, sizeof(p_map->map));
2301
2302 spin_lock_bh(&dcb_lock);
2303 list_for_each_entry(itr, &dcb_app_list, list) {
2304 if (itr->ifindex == ifindex &&
2305 itr->app.selector == IEEE_8021QAZ_APP_SEL_DSCP &&
2306 itr->app.protocol < 64 &&
2307 itr->app.priority < IEEE_8021QAZ_MAX_TCS) {
2308 prio = itr->app.priority;
2309 p_map->map[prio] |= 1ULL << itr->app.protocol;
2310 }
2311 }
2312 spin_unlock_bh(&dcb_lock);
2313}
2314EXPORT_SYMBOL(dcb_ieee_getapp_prio_dscp_mask_map);
2315
2316/*
2317 * dcb_ieee_getapp_dscp_prio_mask_map - For a given device, find mapping from
2318 * DSCP values to the priorities assigned to that DSCP value. Initialize p_map
2319 * such that each map element holds a bit mask of priorities configured for a
2320 * given DSCP value by APP entries.
2321 */
2322void
2323dcb_ieee_getapp_dscp_prio_mask_map(const struct net_device *dev,
2324 struct dcb_ieee_app_dscp_map *p_map)
2325{
2326 int ifindex = dev->ifindex;
2327 struct dcb_app_type *itr;
2328
2329 memset(p_map->map, 0, sizeof(p_map->map));
2330
2331 spin_lock_bh(&dcb_lock);
2332 list_for_each_entry(itr, &dcb_app_list, list) {
2333 if (itr->ifindex == ifindex &&
2334 itr->app.selector == IEEE_8021QAZ_APP_SEL_DSCP &&
2335 itr->app.protocol < 64 &&
2336 itr->app.priority < IEEE_8021QAZ_MAX_TCS)
2337 p_map->map[itr->app.protocol] |= 1 << itr->app.priority;
2338 }
2339 spin_unlock_bh(&dcb_lock);
2340}
2341EXPORT_SYMBOL(dcb_ieee_getapp_dscp_prio_mask_map);
2342
2343/*
2344 * Per 802.1Q-2014, the selector value of 1 is used for matching on Ethernet
2345 * type, with valid PID values >= 1536. A special meaning is then assigned to
2346 * protocol value of 0: "default priority. For use when priority is not
2347 * otherwise specified".
2348 *
2349 * dcb_ieee_getapp_default_prio_mask - For a given device, find all APP entries
2350 * of the form {$PRIO, ETHERTYPE, 0} and construct a bit mask of all default
2351 * priorities set by these entries.
2352 */
2353u8 dcb_ieee_getapp_default_prio_mask(const struct net_device *dev)
2354{
2355 int ifindex = dev->ifindex;
2356 struct dcb_app_type *itr;
2357 u8 mask = 0;
2358
2359 spin_lock_bh(&dcb_lock);
2360 list_for_each_entry(itr, &dcb_app_list, list) {
2361 if (itr->ifindex == ifindex &&
2362 itr->app.selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
2363 itr->app.protocol == 0 &&
2364 itr->app.priority < IEEE_8021QAZ_MAX_TCS)
2365 mask |= 1 << itr->app.priority;
2366 }
2367 spin_unlock_bh(&dcb_lock);
2368
2369 return mask;
2370}
2371EXPORT_SYMBOL(dcb_ieee_getapp_default_prio_mask);
2372
2373static void dcbnl_flush_dev(struct net_device *dev)
2374{
2375 struct dcb_app_type *itr, *tmp;
2376
2377 spin_lock_bh(&dcb_lock);
2378
2379 list_for_each_entry_safe(itr, tmp, &dcb_app_list, list) {
2380 if (itr->ifindex == dev->ifindex) {
2381 list_del(&itr->list);
2382 kfree(itr);
2383 }
2384 }
2385
2386 spin_unlock_bh(&dcb_lock);
2387}
2388
2389static int dcbnl_netdevice_event(struct notifier_block *nb,
2390 unsigned long event, void *ptr)
2391{
2392 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2393
2394 switch (event) {
2395 case NETDEV_UNREGISTER:
2396 if (!dev->dcbnl_ops)
2397 return NOTIFY_DONE;
2398
2399 dcbnl_flush_dev(dev);
2400
2401 return NOTIFY_OK;
2402 default:
2403 return NOTIFY_DONE;
2404 }
2405}
2406
2407static struct notifier_block dcbnl_nb __read_mostly = {
2408 .notifier_call = dcbnl_netdevice_event,
2409};
2410
2411static const struct rtnl_msg_handler dcbnl_rtnl_msg_handlers[] __initconst = {
2412 {.msgtype = RTM_GETDCB, .doit = dcb_doit},
2413 {.msgtype = RTM_SETDCB, .doit = dcb_doit},
2414};
2415
2416static int __init dcbnl_init(void)
2417{
2418 int err;
2419
2420 err = register_netdevice_notifier(&dcbnl_nb);
2421 if (err)
2422 return err;
2423
2424 rtnl_register_many(dcbnl_rtnl_msg_handlers);
2425
2426 return 0;
2427}
2428device_initcall(dcbnl_init);