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[zen-stable.git] / net / dcb / dcbnl.c
blobd86053002c16b896fdea34bd174b37e6c4aa3054
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 <linux/module.h>
29 #include <net/sock.h>
30
31 /**
32 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
33 * intended to allow network traffic with differing requirements
34 * (highly reliable, no drops vs. best effort vs. low latency) to operate
35 * and co-exist on Ethernet. Current DCB features are:
36 *
37 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
38 * framework for assigning bandwidth guarantees to traffic classes.
39 *
40 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
41 * can work independently for each 802.1p priority.
42 *
43 * Congestion Notification - provides a mechanism for end-to-end congestion
44 * control for protocols which do not have built-in congestion management.
45 *
46 * More information about the emerging standards for these Ethernet features
47 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
48 *
49 * This file implements an rtnetlink interface to allow configuration of DCB
50 * features for capable devices.
51 */
52
53 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
54 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
55 MODULE_LICENSE("GPL");
56
57 /**************** DCB attribute policies *************************************/
58
59 /* DCB netlink attributes policy */
60 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
61 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
62 [DCB_ATTR_STATE] = {.type = NLA_U8},
63 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
64 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
65 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
66 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
67 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
68 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
69 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
70 [DCB_ATTR_APP] = {.type = NLA_NESTED},
71 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
72 [DCB_ATTR_DCBX] = {.type = NLA_U8},
73 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
74 };
75
76 /* DCB priority flow control to User Priority nested attributes */
77 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
78 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
85 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
86 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
87 };
88
89 /* DCB priority grouping nested attributes */
90 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
91 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
99 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
100 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
107 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
108 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
109 };
110
111 /* DCB traffic class nested attributes. */
112 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
113 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
116 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
117 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
118 };
119
120 /* DCB capabilities nested attributes. */
121 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
122 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
123 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
129 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
130 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
131 };
132
133 /* DCB capabilities nested attributes. */
134 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
135 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
136 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
137 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
138 };
139
140 /* DCB BCN nested attributes. */
141 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
142 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
149 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
150 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
151 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
165 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
166 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
167 };
168
169 /* DCB APP nested attributes. */
170 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
171 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
172 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
173 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
174 };
175
176 /* IEEE 802.1Qaz nested attributes. */
177 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
178 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
179 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
180 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
181 };
182
183 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
184 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
185 };
186
187 /* DCB number of traffic classes nested attributes. */
188 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
189 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
190 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
191 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
192 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
193 };
194
195 static LIST_HEAD(dcb_app_list);
196 static DEFINE_SPINLOCK(dcb_lock);
197
198 /* standard netlink reply call */
199 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
200 u32 seq, u16 flags)
201 {
202 struct sk_buff *dcbnl_skb;
203 struct dcbmsg *dcb;
204 struct nlmsghdr *nlh;
205 int ret = -EINVAL;
206
207 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
208 if (!dcbnl_skb)
209 return ret;
210
211 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
212
213 dcb = NLMSG_DATA(nlh);
214 dcb->dcb_family = AF_UNSPEC;
215 dcb->cmd = cmd;
216 dcb->dcb_pad = 0;
217
218 ret = nla_put_u8(dcbnl_skb, attr, value);
219 if (ret)
220 goto err;
221
222 /* end the message, assign the nlmsg_len. */
223 nlmsg_end(dcbnl_skb, nlh);
224 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
225 if (ret)
226 return -EINVAL;
227
228 return 0;
229 nlmsg_failure:
230 err:
231 kfree_skb(dcbnl_skb);
232 return ret;
233 }
234
235 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
236 u32 pid, u32 seq, u16 flags)
237 {
238 int ret = -EINVAL;
239
240 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
241 if (!netdev->dcbnl_ops->getstate)
242 return ret;
243
244 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
245 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
246
247 return ret;
248 }
249
250 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
251 u32 pid, u32 seq, u16 flags)
252 {
253 struct sk_buff *dcbnl_skb;
254 struct nlmsghdr *nlh;
255 struct dcbmsg *dcb;
256 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
257 u8 value;
258 int ret = -EINVAL;
259 int i;
260 int getall = 0;
261
262 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
263 return ret;
264
265 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
266 tb[DCB_ATTR_PFC_CFG],
267 dcbnl_pfc_up_nest);
268 if (ret)
269 goto err_out;
270
271 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
272 if (!dcbnl_skb)
273 goto err_out;
274
275 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
276
277 dcb = NLMSG_DATA(nlh);
278 dcb->dcb_family = AF_UNSPEC;
279 dcb->cmd = DCB_CMD_PFC_GCFG;
280
281 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
282 if (!nest)
283 goto err;
284
285 if (data[DCB_PFC_UP_ATTR_ALL])
286 getall = 1;
287
288 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
289 if (!getall && !data[i])
290 continue;
291
292 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
293 &value);
294 ret = nla_put_u8(dcbnl_skb, i, value);
295
296 if (ret) {
297 nla_nest_cancel(dcbnl_skb, nest);
298 goto err;
299 }
300 }
301 nla_nest_end(dcbnl_skb, nest);
302
303 nlmsg_end(dcbnl_skb, nlh);
304
305 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
306 if (ret)
307 goto err_out;
308
309 return 0;
310 nlmsg_failure:
311 err:
312 kfree_skb(dcbnl_skb);
313 err_out:
314 return -EINVAL;
315 }
316
317 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
318 u32 pid, u32 seq, u16 flags)
319 {
320 struct sk_buff *dcbnl_skb;
321 struct nlmsghdr *nlh;
322 struct dcbmsg *dcb;
323 u8 perm_addr[MAX_ADDR_LEN];
324 int ret = -EINVAL;
325
326 if (!netdev->dcbnl_ops->getpermhwaddr)
327 return ret;
328
329 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
330 if (!dcbnl_skb)
331 goto err_out;
332
333 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
334
335 dcb = NLMSG_DATA(nlh);
336 dcb->dcb_family = AF_UNSPEC;
337 dcb->cmd = DCB_CMD_GPERM_HWADDR;
338
339 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
340
341 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
342 perm_addr);
343
344 nlmsg_end(dcbnl_skb, nlh);
345
346 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
347 if (ret)
348 goto err_out;
349
350 return 0;
351
352 nlmsg_failure:
353 kfree_skb(dcbnl_skb);
354 err_out:
355 return -EINVAL;
356 }
357
358 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
359 u32 pid, u32 seq, u16 flags)
360 {
361 struct sk_buff *dcbnl_skb;
362 struct nlmsghdr *nlh;
363 struct dcbmsg *dcb;
364 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
365 u8 value;
366 int ret = -EINVAL;
367 int i;
368 int getall = 0;
369
370 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
371 return ret;
372
373 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
374 dcbnl_cap_nest);
375 if (ret)
376 goto err_out;
377
378 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
379 if (!dcbnl_skb)
380 goto err_out;
381
382 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
383
384 dcb = NLMSG_DATA(nlh);
385 dcb->dcb_family = AF_UNSPEC;
386 dcb->cmd = DCB_CMD_GCAP;
387
388 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
389 if (!nest)
390 goto err;
391
392 if (data[DCB_CAP_ATTR_ALL])
393 getall = 1;
394
395 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
396 if (!getall && !data[i])
397 continue;
398
399 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
400 ret = nla_put_u8(dcbnl_skb, i, value);
401
402 if (ret) {
403 nla_nest_cancel(dcbnl_skb, nest);
404 goto err;
405 }
406 }
407 }
408 nla_nest_end(dcbnl_skb, nest);
409
410 nlmsg_end(dcbnl_skb, nlh);
411
412 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
413 if (ret)
414 goto err_out;
415
416 return 0;
417 nlmsg_failure:
418 err:
419 kfree_skb(dcbnl_skb);
420 err_out:
421 return -EINVAL;
422 }
423
424 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
425 u32 pid, u32 seq, u16 flags)
426 {
427 struct sk_buff *dcbnl_skb;
428 struct nlmsghdr *nlh;
429 struct dcbmsg *dcb;
430 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
431 u8 value;
432 int ret = -EINVAL;
433 int i;
434 int getall = 0;
435
436 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
437 return ret;
438
439 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
440 dcbnl_numtcs_nest);
441 if (ret) {
442 ret = -EINVAL;
443 goto err_out;
444 }
445
446 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
447 if (!dcbnl_skb) {
448 ret = -EINVAL;
449 goto err_out;
450 }
451
452 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
453
454 dcb = NLMSG_DATA(nlh);
455 dcb->dcb_family = AF_UNSPEC;
456 dcb->cmd = DCB_CMD_GNUMTCS;
457
458 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
459 if (!nest) {
460 ret = -EINVAL;
461 goto err;
462 }
463
464 if (data[DCB_NUMTCS_ATTR_ALL])
465 getall = 1;
466
467 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
468 if (!getall && !data[i])
469 continue;
470
471 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
472 if (!ret) {
473 ret = nla_put_u8(dcbnl_skb, i, value);
474
475 if (ret) {
476 nla_nest_cancel(dcbnl_skb, nest);
477 ret = -EINVAL;
478 goto err;
479 }
480 } else {
481 goto err;
482 }
483 }
484 nla_nest_end(dcbnl_skb, nest);
485
486 nlmsg_end(dcbnl_skb, nlh);
487
488 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
489 if (ret) {
490 ret = -EINVAL;
491 goto err_out;
492 }
493
494 return 0;
495 nlmsg_failure:
496 err:
497 kfree_skb(dcbnl_skb);
498 err_out:
499 return ret;
500 }
501
502 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
503 u32 pid, u32 seq, u16 flags)
504 {
505 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
506 int ret = -EINVAL;
507 u8 value;
508 int i;
509
510 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
511 return ret;
512
513 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
514 dcbnl_numtcs_nest);
515
516 if (ret) {
517 ret = -EINVAL;
518 goto err;
519 }
520
521 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
522 if (data[i] == NULL)
523 continue;
524
525 value = nla_get_u8(data[i]);
526
527 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
528
529 if (ret)
530 goto operr;
531 }
532
533 operr:
534 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
535 DCB_ATTR_NUMTCS, pid, seq, flags);
536
537 err:
538 return ret;
539 }
540
541 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
542 u32 pid, u32 seq, u16 flags)
543 {
544 int ret = -EINVAL;
545
546 if (!netdev->dcbnl_ops->getpfcstate)
547 return ret;
548
549 ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
550 DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
551 pid, seq, flags);
552
553 return ret;
554 }
555
556 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
557 u32 pid, u32 seq, u16 flags)
558 {
559 int ret = -EINVAL;
560 u8 value;
561
562 if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
563 return ret;
564
565 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
566
567 netdev->dcbnl_ops->setpfcstate(netdev, value);
568
569 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
570 pid, seq, flags);
571
572 return ret;
573 }
574
575 static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
576 u32 pid, u32 seq, u16 flags)
577 {
578 struct sk_buff *dcbnl_skb;
579 struct nlmsghdr *nlh;
580 struct dcbmsg *dcb;
581 struct nlattr *app_nest;
582 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
583 u16 id;
584 u8 up, idtype;
585 int ret = -EINVAL;
586
587 if (!tb[DCB_ATTR_APP])
588 goto out;
589
590 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
591 dcbnl_app_nest);
592 if (ret)
593 goto out;
594
595 ret = -EINVAL;
596 /* all must be non-null */
597 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
598 (!app_tb[DCB_APP_ATTR_ID]))
599 goto out;
600
601 /* either by eth type or by socket number */
602 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
603 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
604 (idtype != DCB_APP_IDTYPE_PORTNUM))
605 goto out;
606
607 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
608
609 if (netdev->dcbnl_ops->getapp) {
610 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
611 } else {
612 struct dcb_app app = {
613 .selector = idtype,
614 .protocol = id,
615 };
616 up = dcb_getapp(netdev, &app);
617 }
618
619 /* send this back */
620 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
621 if (!dcbnl_skb)
622 goto out;
623
624 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
625 dcb = NLMSG_DATA(nlh);
626 dcb->dcb_family = AF_UNSPEC;
627 dcb->cmd = DCB_CMD_GAPP;
628
629 app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
630 if (!app_nest)
631 goto out_cancel;
632
633 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
634 if (ret)
635 goto out_cancel;
636
637 ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
638 if (ret)
639 goto out_cancel;
640
641 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
642 if (ret)
643 goto out_cancel;
644
645 nla_nest_end(dcbnl_skb, app_nest);
646 nlmsg_end(dcbnl_skb, nlh);
647
648 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
649 if (ret)
650 goto nlmsg_failure;
651
652 goto out;
653
654 out_cancel:
655 nla_nest_cancel(dcbnl_skb, app_nest);
656 nlmsg_failure:
657 kfree_skb(dcbnl_skb);
658 out:
659 return ret;
660 }
661
662 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
663 u32 pid, u32 seq, u16 flags)
664 {
665 int err, ret = -EINVAL;
666 u16 id;
667 u8 up, idtype;
668 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
669
670 if (!tb[DCB_ATTR_APP])
671 goto out;
672
673 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
674 dcbnl_app_nest);
675 if (ret)
676 goto out;
677
678 ret = -EINVAL;
679 /* all must be non-null */
680 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
681 (!app_tb[DCB_APP_ATTR_ID]) ||
682 (!app_tb[DCB_APP_ATTR_PRIORITY]))
683 goto out;
684
685 /* either by eth type or by socket number */
686 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
687 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
688 (idtype != DCB_APP_IDTYPE_PORTNUM))
689 goto out;
690
691 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
692 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
693
694 if (netdev->dcbnl_ops->setapp) {
695 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
696 } else {
697 struct dcb_app app;
698 app.selector = idtype;
699 app.protocol = id;
700 app.priority = up;
701 err = dcb_setapp(netdev, &app);
702 }
703
704 ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
705 pid, seq, flags);
706 out:
707 return ret;
708 }
709
710 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
711 u32 pid, u32 seq, u16 flags, int dir)
712 {
713 struct sk_buff *dcbnl_skb;
714 struct nlmsghdr *nlh;
715 struct dcbmsg *dcb;
716 struct nlattr *pg_nest, *param_nest, *data;
717 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
718 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
719 u8 prio, pgid, tc_pct, up_map;
720 int ret = -EINVAL;
721 int getall = 0;
722 int i;
723
724 if (!tb[DCB_ATTR_PG_CFG] ||
725 !netdev->dcbnl_ops->getpgtccfgtx ||
726 !netdev->dcbnl_ops->getpgtccfgrx ||
727 !netdev->dcbnl_ops->getpgbwgcfgtx ||
728 !netdev->dcbnl_ops->getpgbwgcfgrx)
729 return ret;
730
731 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
732 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
733
734 if (ret)
735 goto err_out;
736
737 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
738 if (!dcbnl_skb)
739 goto err_out;
740
741 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
742
743 dcb = NLMSG_DATA(nlh);
744 dcb->dcb_family = AF_UNSPEC;
745 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
746
747 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
748 if (!pg_nest)
749 goto err;
750
751 if (pg_tb[DCB_PG_ATTR_TC_ALL])
752 getall = 1;
753
754 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
755 if (!getall && !pg_tb[i])
756 continue;
757
758 if (pg_tb[DCB_PG_ATTR_TC_ALL])
759 data = pg_tb[DCB_PG_ATTR_TC_ALL];
760 else
761 data = pg_tb[i];
762 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
763 data, dcbnl_tc_param_nest);
764 if (ret)
765 goto err_pg;
766
767 param_nest = nla_nest_start(dcbnl_skb, i);
768 if (!param_nest)
769 goto err_pg;
770
771 pgid = DCB_ATTR_VALUE_UNDEFINED;
772 prio = DCB_ATTR_VALUE_UNDEFINED;
773 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
774 up_map = DCB_ATTR_VALUE_UNDEFINED;
775
776 if (dir) {
777 /* Rx */
778 netdev->dcbnl_ops->getpgtccfgrx(netdev,
779 i - DCB_PG_ATTR_TC_0, &prio,
780 &pgid, &tc_pct, &up_map);
781 } else {
782 /* Tx */
783 netdev->dcbnl_ops->getpgtccfgtx(netdev,
784 i - DCB_PG_ATTR_TC_0, &prio,
785 &pgid, &tc_pct, &up_map);
786 }
787
788 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
789 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
790 ret = nla_put_u8(dcbnl_skb,
791 DCB_TC_ATTR_PARAM_PGID, pgid);
792 if (ret)
793 goto err_param;
794 }
795 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
796 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
797 ret = nla_put_u8(dcbnl_skb,
798 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
799 if (ret)
800 goto err_param;
801 }
802 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
803 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
804 ret = nla_put_u8(dcbnl_skb,
805 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
806 if (ret)
807 goto err_param;
808 }
809 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
810 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
811 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
812 tc_pct);
813 if (ret)
814 goto err_param;
815 }
816 nla_nest_end(dcbnl_skb, param_nest);
817 }
818
819 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
820 getall = 1;
821 else
822 getall = 0;
823
824 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
825 if (!getall && !pg_tb[i])
826 continue;
827
828 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
829
830 if (dir) {
831 /* Rx */
832 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
833 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
834 } else {
835 /* Tx */
836 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
837 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
838 }
839 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
840
841 if (ret)
842 goto err_pg;
843 }
844
845 nla_nest_end(dcbnl_skb, pg_nest);
846
847 nlmsg_end(dcbnl_skb, nlh);
848
849 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
850 if (ret)
851 goto err_out;
852
853 return 0;
854
855 err_param:
856 nla_nest_cancel(dcbnl_skb, param_nest);
857 err_pg:
858 nla_nest_cancel(dcbnl_skb, pg_nest);
859 nlmsg_failure:
860 err:
861 kfree_skb(dcbnl_skb);
862 err_out:
863 ret = -EINVAL;
864 return ret;
865 }
866
867 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
868 u32 pid, u32 seq, u16 flags)
869 {
870 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
871 }
872
873 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
874 u32 pid, u32 seq, u16 flags)
875 {
876 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
877 }
878
879 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
880 u32 pid, u32 seq, u16 flags)
881 {
882 int ret = -EINVAL;
883 u8 value;
884
885 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
886 return ret;
887
888 value = nla_get_u8(tb[DCB_ATTR_STATE]);
889
890 ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
891 RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
892 pid, seq, flags);
893
894 return ret;
895 }
896
897 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
898 u32 pid, u32 seq, u16 flags)
899 {
900 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
901 int i;
902 int ret = -EINVAL;
903 u8 value;
904
905 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
906 return ret;
907
908 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
909 tb[DCB_ATTR_PFC_CFG],
910 dcbnl_pfc_up_nest);
911 if (ret)
912 goto err;
913
914 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
915 if (data[i] == NULL)
916 continue;
917 value = nla_get_u8(data[i]);
918 netdev->dcbnl_ops->setpfccfg(netdev,
919 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
920 }
921
922 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
923 pid, seq, flags);
924 err:
925 return ret;
926 }
927
928 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
929 u32 pid, u32 seq, u16 flags)
930 {
931 int ret = -EINVAL;
932
933 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
934 return ret;
935
936 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
937 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
938
939 return ret;
940 }
941
942 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
943 u32 pid, u32 seq, u16 flags, int dir)
944 {
945 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
946 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
947 int ret = -EINVAL;
948 int i;
949 u8 pgid;
950 u8 up_map;
951 u8 prio;
952 u8 tc_pct;
953
954 if (!tb[DCB_ATTR_PG_CFG] ||
955 !netdev->dcbnl_ops->setpgtccfgtx ||
956 !netdev->dcbnl_ops->setpgtccfgrx ||
957 !netdev->dcbnl_ops->setpgbwgcfgtx ||
958 !netdev->dcbnl_ops->setpgbwgcfgrx)
959 return ret;
960
961 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
962 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
963 if (ret)
964 goto err;
965
966 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
967 if (!pg_tb[i])
968 continue;
969
970 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
971 pg_tb[i], dcbnl_tc_param_nest);
972 if (ret)
973 goto err;
974
975 pgid = DCB_ATTR_VALUE_UNDEFINED;
976 prio = DCB_ATTR_VALUE_UNDEFINED;
977 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
978 up_map = DCB_ATTR_VALUE_UNDEFINED;
979
980 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
981 prio =
982 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
983
984 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
985 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
986
987 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
988 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
989
990 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
991 up_map =
992 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
993
994 /* dir: Tx = 0, Rx = 1 */
995 if (dir) {
996 /* Rx */
997 netdev->dcbnl_ops->setpgtccfgrx(netdev,
998 i - DCB_PG_ATTR_TC_0,
999 prio, pgid, tc_pct, up_map);
1000 } else {
1001 /* Tx */
1002 netdev->dcbnl_ops->setpgtccfgtx(netdev,
1003 i - DCB_PG_ATTR_TC_0,
1004 prio, pgid, tc_pct, up_map);
1005 }
1006 }
1007
1008 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1009 if (!pg_tb[i])
1010 continue;
1011
1012 tc_pct = nla_get_u8(pg_tb[i]);
1013
1014 /* dir: Tx = 0, Rx = 1 */
1015 if (dir) {
1016 /* Rx */
1017 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1018 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1019 } else {
1020 /* Tx */
1021 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1022 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1023 }
1024 }
1025
1026 ret = dcbnl_reply(0, RTM_SETDCB,
1027 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1028 DCB_ATTR_PG_CFG, pid, seq, flags);
1029
1030 err:
1031 return ret;
1032 }
1033
1034 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1035 u32 pid, u32 seq, u16 flags)
1036 {
1037 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1038 }
1039
1040 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1041 u32 pid, u32 seq, u16 flags)
1042 {
1043 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1044 }
1045
1046 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1047 u32 pid, u32 seq, u16 flags)
1048 {
1049 struct sk_buff *dcbnl_skb;
1050 struct nlmsghdr *nlh;
1051 struct dcbmsg *dcb;
1052 struct nlattr *bcn_nest;
1053 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1054 u8 value_byte;
1055 u32 value_integer;
1056 int ret = -EINVAL;
1057 bool getall = false;
1058 int i;
1059
1060 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1061 !netdev->dcbnl_ops->getbcncfg)
1062 return ret;
1063
1064 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1065 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1066
1067 if (ret)
1068 goto err_out;
1069
1070 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1071 if (!dcbnl_skb)
1072 goto err_out;
1073
1074 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1075
1076 dcb = NLMSG_DATA(nlh);
1077 dcb->dcb_family = AF_UNSPEC;
1078 dcb->cmd = DCB_CMD_BCN_GCFG;
1079
1080 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1081 if (!bcn_nest)
1082 goto err;
1083
1084 if (bcn_tb[DCB_BCN_ATTR_ALL])
1085 getall = true;
1086
1087 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1088 if (!getall && !bcn_tb[i])
1089 continue;
1090
1091 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1092 &value_byte);
1093 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1094 if (ret)
1095 goto err_bcn;
1096 }
1097
1098 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1099 if (!getall && !bcn_tb[i])
1100 continue;
1101
1102 netdev->dcbnl_ops->getbcncfg(netdev, i,
1103 &value_integer);
1104 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1105 if (ret)
1106 goto err_bcn;
1107 }
1108
1109 nla_nest_end(dcbnl_skb, bcn_nest);
1110
1111 nlmsg_end(dcbnl_skb, nlh);
1112
1113 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1114 if (ret)
1115 goto err_out;
1116
1117 return 0;
1118
1119 err_bcn:
1120 nla_nest_cancel(dcbnl_skb, bcn_nest);
1121 nlmsg_failure:
1122 err:
1123 kfree_skb(dcbnl_skb);
1124 err_out:
1125 ret = -EINVAL;
1126 return ret;
1127 }
1128
1129 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1130 u32 pid, u32 seq, u16 flags)
1131 {
1132 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1133 int i;
1134 int ret = -EINVAL;
1135 u8 value_byte;
1136 u32 value_int;
1137
1138 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1139 !netdev->dcbnl_ops->setbcnrp)
1140 return ret;
1141
1142 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1143 tb[DCB_ATTR_BCN],
1144 dcbnl_pfc_up_nest);
1145 if (ret)
1146 goto err;
1147
1148 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1149 if (data[i] == NULL)
1150 continue;
1151 value_byte = nla_get_u8(data[i]);
1152 netdev->dcbnl_ops->setbcnrp(netdev,
1153 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1154 }
1155
1156 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1157 if (data[i] == NULL)
1158 continue;
1159 value_int = nla_get_u32(data[i]);
1160 netdev->dcbnl_ops->setbcncfg(netdev,
1161 i, value_int);
1162 }
1163
1164 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1165 pid, seq, flags);
1166 err:
1167 return ret;
1168 }
1169
1170 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
1171 int app_nested_type, int app_info_type,
1172 int app_entry_type)
1173 {
1174 struct dcb_peer_app_info info;
1175 struct dcb_app *table = NULL;
1176 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1177 u16 app_count;
1178 int err;
1179
1180
1181 /**
1182 * retrieve the peer app configuration form the driver. If the driver
1183 * handlers fail exit without doing anything
1184 */
1185 err = ops->peer_getappinfo(netdev, &info, &app_count);
1186 if (!err && app_count) {
1187 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
1188 if (!table)
1189 return -ENOMEM;
1190
1191 err = ops->peer_getapptable(netdev, table);
1192 }
1193
1194 if (!err) {
1195 u16 i;
1196 struct nlattr *app;
1197
1198 /**
1199 * build the message, from here on the only possible failure
1200 * is due to the skb size
1201 */
1202 err = -EMSGSIZE;
1203
1204 app = nla_nest_start(skb, app_nested_type);
1205 if (!app)
1206 goto nla_put_failure;
1207
1208 if (app_info_type)
1209 NLA_PUT(skb, app_info_type, sizeof(info), &info);
1210
1211 for (i = 0; i < app_count; i++)
1212 NLA_PUT(skb, app_entry_type, sizeof(struct dcb_app),
1213 &table[i]);
1214
1215 nla_nest_end(skb, app);
1216 }
1217 err = 0;
1218
1219 nla_put_failure:
1220 kfree(table);
1221 return err;
1222 }
1223
1224 /* Handle IEEE 802.1Qaz GET commands. */
1225 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1226 {
1227 struct nlattr *ieee, *app;
1228 struct dcb_app_type *itr;
1229 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1230 int dcbx;
1231 int err = -EMSGSIZE;
1232
1233 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1234
1235 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1236 if (!ieee)
1237 goto nla_put_failure;
1238
1239 if (ops->ieee_getets) {
1240 struct ieee_ets ets;
1241 err = ops->ieee_getets(netdev, &ets);
1242 if (!err)
1243 NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1244 }
1245
1246 if (ops->ieee_getpfc) {
1247 struct ieee_pfc pfc;
1248 err = ops->ieee_getpfc(netdev, &pfc);
1249 if (!err)
1250 NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1251 }
1252
1253 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1254 if (!app)
1255 goto nla_put_failure;
1256
1257 spin_lock(&dcb_lock);
1258 list_for_each_entry(itr, &dcb_app_list, list) {
1259 if (itr->ifindex == netdev->ifindex) {
1260 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1261 &itr->app);
1262 if (err) {
1263 spin_unlock(&dcb_lock);
1264 goto nla_put_failure;
1265 }
1266 }
1267 }
1268
1269 if (netdev->dcbnl_ops->getdcbx)
1270 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1271 else
1272 dcbx = -EOPNOTSUPP;
1273
1274 spin_unlock(&dcb_lock);
1275 nla_nest_end(skb, app);
1276
1277 /* get peer info if available */
1278 if (ops->ieee_peer_getets) {
1279 struct ieee_ets ets;
1280 err = ops->ieee_peer_getets(netdev, &ets);
1281 if (!err)
1282 NLA_PUT(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets);
1283 }
1284
1285 if (ops->ieee_peer_getpfc) {
1286 struct ieee_pfc pfc;
1287 err = ops->ieee_peer_getpfc(netdev, &pfc);
1288 if (!err)
1289 NLA_PUT(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc);
1290 }
1291
1292 if (ops->peer_getappinfo && ops->peer_getapptable) {
1293 err = dcbnl_build_peer_app(netdev, skb,
1294 DCB_ATTR_IEEE_PEER_APP,
1295 DCB_ATTR_IEEE_APP_UNSPEC,
1296 DCB_ATTR_IEEE_APP);
1297 if (err)
1298 goto nla_put_failure;
1299 }
1300
1301 nla_nest_end(skb, ieee);
1302 if (dcbx >= 0) {
1303 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1304 if (err)
1305 goto nla_put_failure;
1306 }
1307
1308 return 0;
1309
1310 nla_put_failure:
1311 return err;
1312 }
1313
1314 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1315 int dir)
1316 {
1317 u8 pgid, up_map, prio, tc_pct;
1318 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1319 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1320 struct nlattr *pg = nla_nest_start(skb, i);
1321
1322 if (!pg)
1323 goto nla_put_failure;
1324
1325 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1326 struct nlattr *tc_nest = nla_nest_start(skb, i);
1327
1328 if (!tc_nest)
1329 goto nla_put_failure;
1330
1331 pgid = DCB_ATTR_VALUE_UNDEFINED;
1332 prio = DCB_ATTR_VALUE_UNDEFINED;
1333 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1334 up_map = DCB_ATTR_VALUE_UNDEFINED;
1335
1336 if (!dir)
1337 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1338 &prio, &pgid, &tc_pct, &up_map);
1339 else
1340 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1341 &prio, &pgid, &tc_pct, &up_map);
1342
1343 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_PGID, pgid);
1344 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
1345 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
1346 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct);
1347 nla_nest_end(skb, tc_nest);
1348 }
1349
1350 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1351 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1352
1353 if (!dir)
1354 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1355 &tc_pct);
1356 else
1357 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1358 &tc_pct);
1359 NLA_PUT_U8(skb, i, tc_pct);
1360 }
1361 nla_nest_end(skb, pg);
1362 return 0;
1363
1364 nla_put_failure:
1365 return -EMSGSIZE;
1366 }
1367
1368 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1369 {
1370 struct nlattr *cee, *app;
1371 struct dcb_app_type *itr;
1372 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1373 int dcbx, i, err = -EMSGSIZE;
1374 u8 value;
1375
1376 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1377
1378 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1379 if (!cee)
1380 goto nla_put_failure;
1381
1382 /* local pg */
1383 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1384 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1385 if (err)
1386 goto nla_put_failure;
1387 }
1388
1389 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1390 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1391 if (err)
1392 goto nla_put_failure;
1393 }
1394
1395 /* local pfc */
1396 if (ops->getpfccfg) {
1397 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1398
1399 if (!pfc_nest)
1400 goto nla_put_failure;
1401
1402 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1403 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1404 NLA_PUT_U8(skb, i, value);
1405 }
1406 nla_nest_end(skb, pfc_nest);
1407 }
1408
1409 /* local app */
1410 spin_lock(&dcb_lock);
1411 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1412 if (!app)
1413 goto dcb_unlock;
1414
1415 list_for_each_entry(itr, &dcb_app_list, list) {
1416 if (itr->ifindex == netdev->ifindex) {
1417 struct nlattr *app_nest = nla_nest_start(skb,
1418 DCB_ATTR_APP);
1419 if (!app_nest)
1420 goto dcb_unlock;
1421
1422 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1423 itr->app.selector);
1424 if (err)
1425 goto dcb_unlock;
1426
1427 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1428 itr->app.protocol);
1429 if (err)
1430 goto dcb_unlock;
1431
1432 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1433 itr->app.priority);
1434 if (err)
1435 goto dcb_unlock;
1436
1437 nla_nest_end(skb, app_nest);
1438 }
1439 }
1440 nla_nest_end(skb, app);
1441
1442 if (netdev->dcbnl_ops->getdcbx)
1443 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1444 else
1445 dcbx = -EOPNOTSUPP;
1446
1447 spin_unlock(&dcb_lock);
1448
1449 /* features flags */
1450 if (ops->getfeatcfg) {
1451 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1452 if (!feat)
1453 goto nla_put_failure;
1454
1455 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1456 i++)
1457 if (!ops->getfeatcfg(netdev, i, &value))
1458 NLA_PUT_U8(skb, i, value);
1459
1460 nla_nest_end(skb, feat);
1461 }
1462
1463 /* peer info if available */
1464 if (ops->cee_peer_getpg) {
1465 struct cee_pg 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 }
1470
1471 if (ops->cee_peer_getpfc) {
1472 struct cee_pfc pfc;
1473 err = ops->cee_peer_getpfc(netdev, &pfc);
1474 if (!err)
1475 NLA_PUT(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc);
1476 }
1477
1478 if (ops->peer_getappinfo && ops->peer_getapptable) {
1479 err = dcbnl_build_peer_app(netdev, skb,
1480 DCB_ATTR_CEE_PEER_APP_TABLE,
1481 DCB_ATTR_CEE_PEER_APP_INFO,
1482 DCB_ATTR_CEE_PEER_APP);
1483 if (err)
1484 goto nla_put_failure;
1485 }
1486 nla_nest_end(skb, cee);
1487
1488 /* DCBX state */
1489 if (dcbx >= 0) {
1490 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1491 if (err)
1492 goto nla_put_failure;
1493 }
1494 return 0;
1495
1496 dcb_unlock:
1497 spin_unlock(&dcb_lock);
1498 nla_put_failure:
1499 return err;
1500 }
1501
1502 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1503 u32 seq, u32 pid, int dcbx_ver)
1504 {
1505 struct net *net = dev_net(dev);
1506 struct sk_buff *skb;
1507 struct nlmsghdr *nlh;
1508 struct dcbmsg *dcb;
1509 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1510 int err;
1511
1512 if (!ops)
1513 return -EOPNOTSUPP;
1514
1515 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1516 if (!skb)
1517 return -ENOBUFS;
1518
1519 nlh = nlmsg_put(skb, pid, 0, event, sizeof(*dcb), 0);
1520 if (nlh == NULL) {
1521 nlmsg_free(skb);
1522 return -EMSGSIZE;
1523 }
1524
1525 dcb = NLMSG_DATA(nlh);
1526 dcb->dcb_family = AF_UNSPEC;
1527 dcb->cmd = cmd;
1528
1529 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1530 err = dcbnl_ieee_fill(skb, dev);
1531 else
1532 err = dcbnl_cee_fill(skb, dev);
1533
1534 if (err < 0) {
1535 /* Report error to broadcast listeners */
1536 nlmsg_cancel(skb, nlh);
1537 kfree_skb(skb);
1538 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1539 } else {
1540 /* End nlmsg and notify broadcast listeners */
1541 nlmsg_end(skb, nlh);
1542 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1543 }
1544
1545 return err;
1546 }
1547
1548 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1549 u32 seq, u32 pid)
1550 {
1551 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_IEEE);
1552 }
1553 EXPORT_SYMBOL(dcbnl_ieee_notify);
1554
1555 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1556 u32 seq, u32 pid)
1557 {
1558 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_CEE);
1559 }
1560 EXPORT_SYMBOL(dcbnl_cee_notify);
1561
1562 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1563 * be completed the entire msg is aborted and error value is returned.
1564 * No attempt is made to reconcile the case where only part of the
1565 * cmd can be completed.
1566 */
1567 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1568 u32 pid, u32 seq, u16 flags)
1569 {
1570 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1571 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1572 int err = -EOPNOTSUPP;
1573
1574 if (!ops)
1575 return err;
1576
1577 if (!tb[DCB_ATTR_IEEE])
1578 return -EINVAL;
1579
1580 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1581 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1582 if (err)
1583 return err;
1584
1585 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1586 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1587 err = ops->ieee_setets(netdev, ets);
1588 if (err)
1589 goto err;
1590 }
1591
1592 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1593 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1594 err = ops->ieee_setpfc(netdev, pfc);
1595 if (err)
1596 goto err;
1597 }
1598
1599 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1600 struct nlattr *attr;
1601 int rem;
1602
1603 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1604 struct dcb_app *app_data;
1605 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1606 continue;
1607 app_data = nla_data(attr);
1608 if (ops->ieee_setapp)
1609 err = ops->ieee_setapp(netdev, app_data);
1610 else
1611 err = dcb_ieee_setapp(netdev, app_data);
1612 if (err)
1613 goto err;
1614 }
1615 }
1616
1617 err:
1618 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1619 pid, seq, flags);
1620 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1621 return err;
1622 }
1623
1624 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1625 u32 pid, u32 seq, u16 flags)
1626 {
1627 struct net *net = dev_net(netdev);
1628 struct sk_buff *skb;
1629 struct nlmsghdr *nlh;
1630 struct dcbmsg *dcb;
1631 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1632 int err;
1633
1634 if (!ops)
1635 return -EOPNOTSUPP;
1636
1637 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1638 if (!skb)
1639 return -ENOBUFS;
1640
1641 nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1642 if (nlh == NULL) {
1643 nlmsg_free(skb);
1644 return -EMSGSIZE;
1645 }
1646
1647 dcb = NLMSG_DATA(nlh);
1648 dcb->dcb_family = AF_UNSPEC;
1649 dcb->cmd = DCB_CMD_IEEE_GET;
1650
1651 err = dcbnl_ieee_fill(skb, netdev);
1652
1653 if (err < 0) {
1654 nlmsg_cancel(skb, nlh);
1655 kfree_skb(skb);
1656 } else {
1657 nlmsg_end(skb, nlh);
1658 err = rtnl_unicast(skb, net, pid);
1659 }
1660
1661 return err;
1662 }
1663
1664 static int dcbnl_ieee_del(struct net_device *netdev, struct nlattr **tb,
1665 u32 pid, u32 seq, u16 flags)
1666 {
1667 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1668 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1669 int err = -EOPNOTSUPP;
1670
1671 if (!ops)
1672 return -EOPNOTSUPP;
1673
1674 if (!tb[DCB_ATTR_IEEE])
1675 return -EINVAL;
1676
1677 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1678 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1679 if (err)
1680 return err;
1681
1682 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1683 struct nlattr *attr;
1684 int rem;
1685
1686 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1687 struct dcb_app *app_data;
1688
1689 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1690 continue;
1691 app_data = nla_data(attr);
1692 if (ops->ieee_delapp)
1693 err = ops->ieee_delapp(netdev, app_data);
1694 else
1695 err = dcb_ieee_delapp(netdev, app_data);
1696 if (err)
1697 goto err;
1698 }
1699 }
1700
1701 err:
1702 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_DEL, DCB_ATTR_IEEE,
1703 pid, seq, flags);
1704 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1705 return err;
1706 }
1707
1708
1709 /* DCBX configuration */
1710 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1711 u32 pid, u32 seq, u16 flags)
1712 {
1713 int ret;
1714
1715 if (!netdev->dcbnl_ops->getdcbx)
1716 return -EOPNOTSUPP;
1717
1718 ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1719 DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1720
1721 return ret;
1722 }
1723
1724 static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1725 u32 pid, u32 seq, u16 flags)
1726 {
1727 int ret;
1728 u8 value;
1729
1730 if (!netdev->dcbnl_ops->setdcbx)
1731 return -EOPNOTSUPP;
1732
1733 if (!tb[DCB_ATTR_DCBX])
1734 return -EINVAL;
1735
1736 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1737
1738 ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1739 RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1740 pid, seq, flags);
1741
1742 return ret;
1743 }
1744
1745 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1746 u32 pid, u32 seq, u16 flags)
1747 {
1748 struct sk_buff *dcbnl_skb;
1749 struct nlmsghdr *nlh;
1750 struct dcbmsg *dcb;
1751 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1752 u8 value;
1753 int ret, i;
1754 int getall = 0;
1755
1756 if (!netdev->dcbnl_ops->getfeatcfg)
1757 return -EOPNOTSUPP;
1758
1759 if (!tb[DCB_ATTR_FEATCFG])
1760 return -EINVAL;
1761
1762 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1763 dcbnl_featcfg_nest);
1764 if (ret)
1765 goto err_out;
1766
1767 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1768 if (!dcbnl_skb) {
1769 ret = -ENOBUFS;
1770 goto err_out;
1771 }
1772
1773 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1774
1775 dcb = NLMSG_DATA(nlh);
1776 dcb->dcb_family = AF_UNSPEC;
1777 dcb->cmd = DCB_CMD_GFEATCFG;
1778
1779 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1780 if (!nest) {
1781 ret = -EMSGSIZE;
1782 goto nla_put_failure;
1783 }
1784
1785 if (data[DCB_FEATCFG_ATTR_ALL])
1786 getall = 1;
1787
1788 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1789 if (!getall && !data[i])
1790 continue;
1791
1792 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1793 if (!ret)
1794 ret = nla_put_u8(dcbnl_skb, i, value);
1795
1796 if (ret) {
1797 nla_nest_cancel(dcbnl_skb, nest);
1798 goto nla_put_failure;
1799 }
1800 }
1801 nla_nest_end(dcbnl_skb, nest);
1802
1803 nlmsg_end(dcbnl_skb, nlh);
1804
1805 return rtnl_unicast(dcbnl_skb, &init_net, pid);
1806 nla_put_failure:
1807 nlmsg_cancel(dcbnl_skb, nlh);
1808 nlmsg_failure:
1809 kfree_skb(dcbnl_skb);
1810 err_out:
1811 return ret;
1812 }
1813
1814 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1815 u32 pid, u32 seq, u16 flags)
1816 {
1817 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1818 int ret, i;
1819 u8 value;
1820
1821 if (!netdev->dcbnl_ops->setfeatcfg)
1822 return -ENOTSUPP;
1823
1824 if (!tb[DCB_ATTR_FEATCFG])
1825 return -EINVAL;
1826
1827 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1828 dcbnl_featcfg_nest);
1829
1830 if (ret)
1831 goto err;
1832
1833 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1834 if (data[i] == NULL)
1835 continue;
1836
1837 value = nla_get_u8(data[i]);
1838
1839 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1840
1841 if (ret)
1842 goto err;
1843 }
1844 err:
1845 dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1846 pid, seq, flags);
1847
1848 return ret;
1849 }
1850
1851 /* Handle CEE DCBX GET commands. */
1852 static int dcbnl_cee_get(struct net_device *netdev, struct nlattr **tb,
1853 u32 pid, u32 seq, u16 flags)
1854 {
1855 struct net *net = dev_net(netdev);
1856 struct sk_buff *skb;
1857 struct nlmsghdr *nlh;
1858 struct dcbmsg *dcb;
1859 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1860 int err;
1861
1862 if (!ops)
1863 return -EOPNOTSUPP;
1864
1865 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1866 if (!skb)
1867 return -ENOBUFS;
1868
1869 nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1870 if (nlh == NULL) {
1871 nlmsg_free(skb);
1872 return -EMSGSIZE;
1873 }
1874
1875 dcb = NLMSG_DATA(nlh);
1876 dcb->dcb_family = AF_UNSPEC;
1877 dcb->cmd = DCB_CMD_CEE_GET;
1878
1879 err = dcbnl_cee_fill(skb, netdev);
1880
1881 if (err < 0) {
1882 nlmsg_cancel(skb, nlh);
1883 nlmsg_free(skb);
1884 } else {
1885 nlmsg_end(skb, nlh);
1886 err = rtnl_unicast(skb, net, pid);
1887 }
1888 return err;
1889 }
1890
1891 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1892 {
1893 struct net *net = sock_net(skb->sk);
1894 struct net_device *netdev;
1895 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1896 struct nlattr *tb[DCB_ATTR_MAX + 1];
1897 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1898 int ret = -EINVAL;
1899
1900 if (!net_eq(net, &init_net))
1901 return -EINVAL;
1902
1903 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1904 dcbnl_rtnl_policy);
1905 if (ret < 0)
1906 return ret;
1907
1908 if (!tb[DCB_ATTR_IFNAME])
1909 return -EINVAL;
1910
1911 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1912 if (!netdev)
1913 return -EINVAL;
1914
1915 if (!netdev->dcbnl_ops)
1916 goto errout;
1917
1918 switch (dcb->cmd) {
1919 case DCB_CMD_GSTATE:
1920 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1921 nlh->nlmsg_flags);
1922 goto out;
1923 case DCB_CMD_PFC_GCFG:
1924 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1925 nlh->nlmsg_flags);
1926 goto out;
1927 case DCB_CMD_GPERM_HWADDR:
1928 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1929 nlh->nlmsg_flags);
1930 goto out;
1931 case DCB_CMD_PGTX_GCFG:
1932 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1933 nlh->nlmsg_flags);
1934 goto out;
1935 case DCB_CMD_PGRX_GCFG:
1936 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1937 nlh->nlmsg_flags);
1938 goto out;
1939 case DCB_CMD_BCN_GCFG:
1940 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1941 nlh->nlmsg_flags);
1942 goto out;
1943 case DCB_CMD_SSTATE:
1944 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1945 nlh->nlmsg_flags);
1946 goto out;
1947 case DCB_CMD_PFC_SCFG:
1948 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1949 nlh->nlmsg_flags);
1950 goto out;
1951
1952 case DCB_CMD_SET_ALL:
1953 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1954 nlh->nlmsg_flags);
1955 goto out;
1956 case DCB_CMD_PGTX_SCFG:
1957 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1958 nlh->nlmsg_flags);
1959 goto out;
1960 case DCB_CMD_PGRX_SCFG:
1961 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1962 nlh->nlmsg_flags);
1963 goto out;
1964 case DCB_CMD_GCAP:
1965 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1966 nlh->nlmsg_flags);
1967 goto out;
1968 case DCB_CMD_GNUMTCS:
1969 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1970 nlh->nlmsg_flags);
1971 goto out;
1972 case DCB_CMD_SNUMTCS:
1973 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1974 nlh->nlmsg_flags);
1975 goto out;
1976 case DCB_CMD_PFC_GSTATE:
1977 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1978 nlh->nlmsg_flags);
1979 goto out;
1980 case DCB_CMD_PFC_SSTATE:
1981 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1982 nlh->nlmsg_flags);
1983 goto out;
1984 case DCB_CMD_BCN_SCFG:
1985 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1986 nlh->nlmsg_flags);
1987 goto out;
1988 case DCB_CMD_GAPP:
1989 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1990 nlh->nlmsg_flags);
1991 goto out;
1992 case DCB_CMD_SAPP:
1993 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1994 nlh->nlmsg_flags);
1995 goto out;
1996 case DCB_CMD_IEEE_SET:
1997 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1998 nlh->nlmsg_flags);
1999 goto out;
2000 case DCB_CMD_IEEE_GET:
2001 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
2002 nlh->nlmsg_flags);
2003 goto out;
2004 case DCB_CMD_IEEE_DEL:
2005 ret = dcbnl_ieee_del(netdev, tb, pid, nlh->nlmsg_seq,
2006 nlh->nlmsg_flags);
2007 goto out;
2008 case DCB_CMD_GDCBX:
2009 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
2010 nlh->nlmsg_flags);
2011 goto out;
2012 case DCB_CMD_SDCBX:
2013 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
2014 nlh->nlmsg_flags);
2015 goto out;
2016 case DCB_CMD_GFEATCFG:
2017 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
2018 nlh->nlmsg_flags);
2019 goto out;
2020 case DCB_CMD_SFEATCFG:
2021 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
2022 nlh->nlmsg_flags);
2023 goto out;
2024 case DCB_CMD_CEE_GET:
2025 ret = dcbnl_cee_get(netdev, tb, pid, nlh->nlmsg_seq,
2026 nlh->nlmsg_flags);
2027 goto out;
2028 default:
2029 goto errout;
2030 }
2031 errout:
2032 ret = -EINVAL;
2033 out:
2034 dev_put(netdev);
2035 return ret;
2036 }
2037
2038 /**
2039 * dcb_getapp - retrieve the DCBX application user priority
2040 *
2041 * On success returns a non-zero 802.1p user priority bitmap
2042 * otherwise returns 0 as the invalid user priority bitmap to
2043 * indicate an error.
2044 */
2045 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
2046 {
2047 struct dcb_app_type *itr;
2048 u8 prio = 0;
2049
2050 spin_lock(&dcb_lock);
2051 list_for_each_entry(itr, &dcb_app_list, list) {
2052 if (itr->app.selector == app->selector &&
2053 itr->app.protocol == app->protocol &&
2054 itr->ifindex == dev->ifindex) {
2055 prio = itr->app.priority;
2056 break;
2057 }
2058 }
2059 spin_unlock(&dcb_lock);
2060
2061 return prio;
2062 }
2063 EXPORT_SYMBOL(dcb_getapp);
2064
2065 /**
2066 * dcb_setapp - add CEE dcb application data to app list
2067 *
2068 * Priority 0 is an invalid priority in CEE spec. This routine
2069 * removes applications from the app list if the priority is
2070 * set to zero.
2071 */
2072 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
2073 {
2074 struct dcb_app_type *itr;
2075 struct dcb_app_type event;
2076
2077 event.ifindex = dev->ifindex;
2078 memcpy(&event.app, new, sizeof(event.app));
2079 if (dev->dcbnl_ops->getdcbx)
2080 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
2081
2082 spin_lock(&dcb_lock);
2083 /* Search for existing match and replace */
2084 list_for_each_entry(itr, &dcb_app_list, list) {
2085 if (itr->app.selector == new->selector &&
2086 itr->app.protocol == new->protocol &&
2087 itr->ifindex == dev->ifindex) {
2088 if (new->priority)
2089 itr->app.priority = new->priority;
2090 else {
2091 list_del(&itr->list);
2092 kfree(itr);
2093 }
2094 goto out;
2095 }
2096 }
2097 /* App type does not exist add new application type */
2098 if (new->priority) {
2099 struct dcb_app_type *entry;
2100 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
2101 if (!entry) {
2102 spin_unlock(&dcb_lock);
2103 return -ENOMEM;
2104 }
2105
2106 memcpy(&entry->app, new, sizeof(*new));
2107 entry->ifindex = dev->ifindex;
2108 list_add(&entry->list, &dcb_app_list);
2109 }
2110 out:
2111 spin_unlock(&dcb_lock);
2112 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2113 return 0;
2114 }
2115 EXPORT_SYMBOL(dcb_setapp);
2116
2117 /**
2118 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
2119 *
2120 * Helper routine which on success returns a non-zero 802.1Qaz user
2121 * priority bitmap otherwise returns 0 to indicate the dcb_app was
2122 * not found in APP list.
2123 */
2124 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
2125 {
2126 struct dcb_app_type *itr;
2127 u8 prio = 0;
2128
2129 spin_lock(&dcb_lock);
2130 list_for_each_entry(itr, &dcb_app_list, list) {
2131 if (itr->app.selector == app->selector &&
2132 itr->app.protocol == app->protocol &&
2133 itr->ifindex == dev->ifindex) {
2134 prio |= 1 << itr->app.priority;
2135 }
2136 }
2137 spin_unlock(&dcb_lock);
2138
2139 return prio;
2140 }
2141 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
2142
2143 /**
2144 * dcb_ieee_setapp - add IEEE dcb application data to app list
2145 *
2146 * This adds Application data to the list. Multiple application
2147 * entries may exists for the same selector and protocol as long
2148 * as the priorities are different.
2149 */
2150 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
2151 {
2152 struct dcb_app_type *itr, *entry;
2153 struct dcb_app_type event;
2154 int err = 0;
2155
2156 event.ifindex = dev->ifindex;
2157 memcpy(&event.app, new, sizeof(event.app));
2158 if (dev->dcbnl_ops->getdcbx)
2159 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
2160
2161 spin_lock(&dcb_lock);
2162 /* Search for existing match and abort if found */
2163 list_for_each_entry(itr, &dcb_app_list, list) {
2164 if (itr->app.selector == new->selector &&
2165 itr->app.protocol == new->protocol &&
2166 itr->app.priority == new->priority &&
2167 itr->ifindex == dev->ifindex) {
2168 err = -EEXIST;
2169 goto out;
2170 }
2171 }
2172
2173 /* App entry does not exist add new entry */
2174 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
2175 if (!entry) {
2176 err = -ENOMEM;
2177 goto out;
2178 }
2179
2180 memcpy(&entry->app, new, sizeof(*new));
2181 entry->ifindex = dev->ifindex;
2182 list_add(&entry->list, &dcb_app_list);
2183 out:
2184 spin_unlock(&dcb_lock);
2185 if (!err)
2186 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2187 return err;
2188 }
2189 EXPORT_SYMBOL(dcb_ieee_setapp);
2190
2191 /**
2192 * dcb_ieee_delapp - delete IEEE dcb application data from list
2193 *
2194 * This removes a matching APP data from the APP list
2195 */
2196 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
2197 {
2198 struct dcb_app_type *itr;
2199 struct dcb_app_type event;
2200 int err = -ENOENT;
2201
2202 event.ifindex = dev->ifindex;
2203 memcpy(&event.app, del, sizeof(event.app));
2204 if (dev->dcbnl_ops->getdcbx)
2205 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
2206
2207 spin_lock(&dcb_lock);
2208 /* Search for existing match and remove it. */
2209 list_for_each_entry(itr, &dcb_app_list, list) {
2210 if (itr->app.selector == del->selector &&
2211 itr->app.protocol == del->protocol &&
2212 itr->app.priority == del->priority &&
2213 itr->ifindex == dev->ifindex) {
2214 list_del(&itr->list);
2215 kfree(itr);
2216 err = 0;
2217 goto out;
2218 }
2219 }
2220
2221 out:
2222 spin_unlock(&dcb_lock);
2223 if (!err)
2224 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2225 return err;
2226 }
2227 EXPORT_SYMBOL(dcb_ieee_delapp);
2228
2229 static void dcb_flushapp(void)
2230 {
2231 struct dcb_app_type *app;
2232 struct dcb_app_type *tmp;
2233
2234 spin_lock(&dcb_lock);
2235 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
2236 list_del(&app->list);
2237 kfree(app);
2238 }
2239 spin_unlock(&dcb_lock);
2240 }
2241
2242 static int __init dcbnl_init(void)
2243 {
2244 INIT_LIST_HEAD(&dcb_app_list);
2245
2246 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
2247 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
2248
2249 return 0;
2250 }
2251 module_init(dcbnl_init);
2252
2253 static void __exit dcbnl_exit(void)
2254 {
2255 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
2256 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
2257 dcb_flushapp();
2258 }
2259 module_exit(dcbnl_exit);