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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / net / dcb / dcbnl.c
blob8379496de82b92fe298d808981bf55edb9a50a05
1 /*
2 * Copyright (c) 2008, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
16 *
17 * Author: Lucy Liu <lucy.liu@intel.com>
18 */
19
20 #include <linux/netdevice.h>
21 #include <linux/netlink.h>
22 #include <net/netlink.h>
23 #include <net/rtnetlink.h>
24 #include <linux/dcbnl.h>
25 #include <linux/rtnetlink.h>
26 #include <net/sock.h>
27
28 /**
29 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
30 * intended to allow network traffic with differing requirements
31 * (highly reliable, no drops vs. best effort vs. low latency) to operate
32 * and co-exist on Ethernet. Current DCB features are:
33 *
34 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
35 * framework for assigning bandwidth guarantees to traffic classes.
36 *
37 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
38 * can work independently for each 802.1p priority.
39 *
40 * Congestion Notification - provides a mechanism for end-to-end congestion
41 * control for protocols which do not have built-in congestion management.
42 *
43 * More information about the emerging standards for these Ethernet features
44 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
45 *
46 * This file implements an rtnetlink interface to allow configuration of DCB
47 * features for capable devices.
48 */
49
50 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
51 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
52 MODULE_LICENSE("GPL");
53
54 /**************** DCB attribute policies *************************************/
55
56 /* DCB netlink attributes policy */
57 static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
58 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
59 [DCB_ATTR_STATE] = {.type = NLA_U8},
60 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
61 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
62 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
63 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
64 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
65 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
66 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
67 };
68
69 /* DCB priority flow control to User Priority nested attributes */
70 static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
71 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
72 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
73 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
74 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
75 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
76 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
80 };
81
82 /* DCB priority grouping nested attributes */
83 static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
84 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
85 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
86 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
87 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
88 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
89 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
94 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
95 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
96 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
97 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
98 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
102 };
103
104 /* DCB traffic class nested attributes. */
105 static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
106 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
107 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
108 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
109 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
110 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
111 };
112
113 /* DCB capabilities nested attributes. */
114 static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
115 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
116 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
117 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
118 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
119 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
120 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
121 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
122 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
123 };
124
125 /* DCB capabilities nested attributes. */
126 static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
127 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
128 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
129 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
130 };
131
132 /* DCB BCN nested attributes. */
133 static struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
134 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
135 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
136 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
137 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
138 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
139 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
140 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
141 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
143 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
144 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
145 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
146 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
147 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
148 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
149 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
150 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
159 };
160
161 /* standard netlink reply call */
162 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
163 u32 seq, u16 flags)
164 {
165 struct sk_buff *dcbnl_skb;
166 struct dcbmsg *dcb;
167 struct nlmsghdr *nlh;
168 int ret = -EINVAL;
169
170 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
171 if (!dcbnl_skb)
172 return ret;
173
174 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
175
176 dcb = NLMSG_DATA(nlh);
177 dcb->dcb_family = AF_UNSPEC;
178 dcb->cmd = cmd;
179 dcb->dcb_pad = 0;
180
181 ret = nla_put_u8(dcbnl_skb, attr, value);
182 if (ret)
183 goto err;
184
185 /* end the message, assign the nlmsg_len. */
186 nlmsg_end(dcbnl_skb, nlh);
187 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
188 if (ret)
189 goto err;
190
191 return 0;
192 nlmsg_failure:
193 err:
194 kfree_skb(dcbnl_skb);
195 return ret;
196 }
197
198 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
199 u32 pid, u32 seq, u16 flags)
200 {
201 int ret = -EINVAL;
202
203 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
204 if (!netdev->dcbnl_ops->getstate)
205 return ret;
206
207 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
208 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
209
210 return ret;
211 }
212
213 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
214 u32 pid, u32 seq, u16 flags)
215 {
216 struct sk_buff *dcbnl_skb;
217 struct nlmsghdr *nlh;
218 struct dcbmsg *dcb;
219 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
220 u8 value;
221 int ret = -EINVAL;
222 int i;
223 int getall = 0;
224
225 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
226 return ret;
227
228 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
229 tb[DCB_ATTR_PFC_CFG],
230 dcbnl_pfc_up_nest);
231 if (ret)
232 goto err_out;
233
234 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
235 if (!dcbnl_skb)
236 goto err_out;
237
238 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
239
240 dcb = NLMSG_DATA(nlh);
241 dcb->dcb_family = AF_UNSPEC;
242 dcb->cmd = DCB_CMD_PFC_GCFG;
243
244 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
245 if (!nest)
246 goto err;
247
248 if (data[DCB_PFC_UP_ATTR_ALL])
249 getall = 1;
250
251 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
252 if (!getall && !data[i])
253 continue;
254
255 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
256 &value);
257 ret = nla_put_u8(dcbnl_skb, i, value);
258
259 if (ret) {
260 nla_nest_cancel(dcbnl_skb, nest);
261 goto err;
262 }
263 }
264 nla_nest_end(dcbnl_skb, nest);
265
266 nlmsg_end(dcbnl_skb, nlh);
267
268 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
269 if (ret)
270 goto err;
271
272 return 0;
273 nlmsg_failure:
274 err:
275 kfree_skb(dcbnl_skb);
276 err_out:
277 return -EINVAL;
278 }
279
280 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
281 u32 pid, u32 seq, u16 flags)
282 {
283 struct sk_buff *dcbnl_skb;
284 struct nlmsghdr *nlh;
285 struct dcbmsg *dcb;
286 u8 perm_addr[MAX_ADDR_LEN];
287 int ret = -EINVAL;
288
289 if (!netdev->dcbnl_ops->getpermhwaddr)
290 return ret;
291
292 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
293 if (!dcbnl_skb)
294 goto err_out;
295
296 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
297
298 dcb = NLMSG_DATA(nlh);
299 dcb->dcb_family = AF_UNSPEC;
300 dcb->cmd = DCB_CMD_GPERM_HWADDR;
301
302 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
303
304 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
305 perm_addr);
306
307 nlmsg_end(dcbnl_skb, nlh);
308
309 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
310 if (ret)
311 goto err;
312
313 return 0;
314
315 nlmsg_failure:
316 err:
317 kfree_skb(dcbnl_skb);
318 err_out:
319 return -EINVAL;
320 }
321
322 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
323 u32 pid, u32 seq, u16 flags)
324 {
325 struct sk_buff *dcbnl_skb;
326 struct nlmsghdr *nlh;
327 struct dcbmsg *dcb;
328 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
329 u8 value;
330 int ret = -EINVAL;
331 int i;
332 int getall = 0;
333
334 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
335 return ret;
336
337 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
338 dcbnl_cap_nest);
339 if (ret)
340 goto err_out;
341
342 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
343 if (!dcbnl_skb)
344 goto err_out;
345
346 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
347
348 dcb = NLMSG_DATA(nlh);
349 dcb->dcb_family = AF_UNSPEC;
350 dcb->cmd = DCB_CMD_GCAP;
351
352 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
353 if (!nest)
354 goto err;
355
356 if (data[DCB_CAP_ATTR_ALL])
357 getall = 1;
358
359 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
360 if (!getall && !data[i])
361 continue;
362
363 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
364 ret = nla_put_u8(dcbnl_skb, i, value);
365
366 if (ret) {
367 nla_nest_cancel(dcbnl_skb, nest);
368 goto err;
369 }
370 }
371 }
372 nla_nest_end(dcbnl_skb, nest);
373
374 nlmsg_end(dcbnl_skb, nlh);
375
376 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
377 if (ret)
378 goto err;
379
380 return 0;
381 nlmsg_failure:
382 err:
383 kfree_skb(dcbnl_skb);
384 err_out:
385 return -EINVAL;
386 }
387
388 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
389 u32 pid, u32 seq, u16 flags)
390 {
391 struct sk_buff *dcbnl_skb;
392 struct nlmsghdr *nlh;
393 struct dcbmsg *dcb;
394 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
395 u8 value;
396 int ret = -EINVAL;
397 int i;
398 int getall = 0;
399
400 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
401 return ret;
402
403 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
404 dcbnl_numtcs_nest);
405 if (ret) {
406 ret = -EINVAL;
407 goto err_out;
408 }
409
410 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
411 if (!dcbnl_skb) {
412 ret = -EINVAL;
413 goto err_out;
414 }
415
416 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
417
418 dcb = NLMSG_DATA(nlh);
419 dcb->dcb_family = AF_UNSPEC;
420 dcb->cmd = DCB_CMD_GNUMTCS;
421
422 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
423 if (!nest) {
424 ret = -EINVAL;
425 goto err;
426 }
427
428 if (data[DCB_NUMTCS_ATTR_ALL])
429 getall = 1;
430
431 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
432 if (!getall && !data[i])
433 continue;
434
435 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
436 if (!ret) {
437 ret = nla_put_u8(dcbnl_skb, i, value);
438
439 if (ret) {
440 nla_nest_cancel(dcbnl_skb, nest);
441 ret = -EINVAL;
442 goto err;
443 }
444 } else {
445 goto err;
446 }
447 }
448 nla_nest_end(dcbnl_skb, nest);
449
450 nlmsg_end(dcbnl_skb, nlh);
451
452 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
453 if (ret) {
454 ret = -EINVAL;
455 goto err;
456 }
457
458 return 0;
459 nlmsg_failure:
460 err:
461 kfree_skb(dcbnl_skb);
462 err_out:
463 return ret;
464 }
465
466 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
467 u32 pid, u32 seq, u16 flags)
468 {
469 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
470 int ret = -EINVAL;
471 u8 value;
472 int i;
473
474 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
475 return ret;
476
477 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
478 dcbnl_numtcs_nest);
479
480 if (ret) {
481 ret = -EINVAL;
482 goto err;
483 }
484
485 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
486 if (data[i] == NULL)
487 continue;
488
489 value = nla_get_u8(data[i]);
490
491 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
492
493 if (ret)
494 goto operr;
495 }
496
497 operr:
498 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
499 DCB_ATTR_NUMTCS, pid, seq, flags);
500
501 err:
502 return ret;
503 }
504
505 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
506 u32 pid, u32 seq, u16 flags)
507 {
508 int ret = -EINVAL;
509
510 if (!netdev->dcbnl_ops->getpfcstate)
511 return ret;
512
513 ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
514 DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
515 pid, seq, flags);
516
517 return ret;
518 }
519
520 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
521 u32 pid, u32 seq, u16 flags)
522 {
523 int ret = -EINVAL;
524 u8 value;
525
526 if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
527 return ret;
528
529 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
530
531 netdev->dcbnl_ops->setpfcstate(netdev, value);
532
533 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
534 pid, seq, flags);
535
536 return ret;
537 }
538
539 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
540 u32 pid, u32 seq, u16 flags, int dir)
541 {
542 struct sk_buff *dcbnl_skb;
543 struct nlmsghdr *nlh;
544 struct dcbmsg *dcb;
545 struct nlattr *pg_nest, *param_nest, *data;
546 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
547 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
548 u8 prio, pgid, tc_pct, up_map;
549 int ret = -EINVAL;
550 int getall = 0;
551 int i;
552
553 if (!tb[DCB_ATTR_PG_CFG] ||
554 !netdev->dcbnl_ops->getpgtccfgtx ||
555 !netdev->dcbnl_ops->getpgtccfgrx ||
556 !netdev->dcbnl_ops->getpgbwgcfgtx ||
557 !netdev->dcbnl_ops->getpgbwgcfgrx)
558 return ret;
559
560 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
561 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
562
563 if (ret)
564 goto err_out;
565
566 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
567 if (!dcbnl_skb)
568 goto err_out;
569
570 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
571
572 dcb = NLMSG_DATA(nlh);
573 dcb->dcb_family = AF_UNSPEC;
574 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
575
576 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
577 if (!pg_nest)
578 goto err;
579
580 if (pg_tb[DCB_PG_ATTR_TC_ALL])
581 getall = 1;
582
583 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
584 if (!getall && !pg_tb[i])
585 continue;
586
587 if (pg_tb[DCB_PG_ATTR_TC_ALL])
588 data = pg_tb[DCB_PG_ATTR_TC_ALL];
589 else
590 data = pg_tb[i];
591 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
592 data, dcbnl_tc_param_nest);
593 if (ret)
594 goto err_pg;
595
596 param_nest = nla_nest_start(dcbnl_skb, i);
597 if (!param_nest)
598 goto err_pg;
599
600 pgid = DCB_ATTR_VALUE_UNDEFINED;
601 prio = DCB_ATTR_VALUE_UNDEFINED;
602 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
603 up_map = DCB_ATTR_VALUE_UNDEFINED;
604
605 if (dir) {
606 /* Rx */
607 netdev->dcbnl_ops->getpgtccfgrx(netdev,
608 i - DCB_PG_ATTR_TC_0, &prio,
609 &pgid, &tc_pct, &up_map);
610 } else {
611 /* Tx */
612 netdev->dcbnl_ops->getpgtccfgtx(netdev,
613 i - DCB_PG_ATTR_TC_0, &prio,
614 &pgid, &tc_pct, &up_map);
615 }
616
617 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
618 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
619 ret = nla_put_u8(dcbnl_skb,
620 DCB_TC_ATTR_PARAM_PGID, pgid);
621 if (ret)
622 goto err_param;
623 }
624 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
625 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
626 ret = nla_put_u8(dcbnl_skb,
627 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
628 if (ret)
629 goto err_param;
630 }
631 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
632 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
633 ret = nla_put_u8(dcbnl_skb,
634 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
635 if (ret)
636 goto err_param;
637 }
638 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
639 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
640 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
641 tc_pct);
642 if (ret)
643 goto err_param;
644 }
645 nla_nest_end(dcbnl_skb, param_nest);
646 }
647
648 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
649 getall = 1;
650 else
651 getall = 0;
652
653 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
654 if (!getall && !pg_tb[i])
655 continue;
656
657 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
658
659 if (dir) {
660 /* Rx */
661 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
662 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
663 } else {
664 /* Tx */
665 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
666 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
667 }
668 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
669
670 if (ret)
671 goto err_pg;
672 }
673
674 nla_nest_end(dcbnl_skb, pg_nest);
675
676 nlmsg_end(dcbnl_skb, nlh);
677
678 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
679 if (ret)
680 goto err;
681
682 return 0;
683
684 err_param:
685 nla_nest_cancel(dcbnl_skb, param_nest);
686 err_pg:
687 nla_nest_cancel(dcbnl_skb, pg_nest);
688 nlmsg_failure:
689 err:
690 kfree_skb(dcbnl_skb);
691 err_out:
692 ret = -EINVAL;
693 return ret;
694 }
695
696 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
697 u32 pid, u32 seq, u16 flags)
698 {
699 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
700 }
701
702 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
703 u32 pid, u32 seq, u16 flags)
704 {
705 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
706 }
707
708 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
709 u32 pid, u32 seq, u16 flags)
710 {
711 int ret = -EINVAL;
712 u8 value;
713
714 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
715 return ret;
716
717 value = nla_get_u8(tb[DCB_ATTR_STATE]);
718
719 ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
720 RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
721 pid, seq, flags);
722
723 return ret;
724 }
725
726 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
727 u32 pid, u32 seq, u16 flags)
728 {
729 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
730 int i;
731 int ret = -EINVAL;
732 u8 value;
733
734 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
735 return ret;
736
737 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
738 tb[DCB_ATTR_PFC_CFG],
739 dcbnl_pfc_up_nest);
740 if (ret)
741 goto err;
742
743 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
744 if (data[i] == NULL)
745 continue;
746 value = nla_get_u8(data[i]);
747 netdev->dcbnl_ops->setpfccfg(netdev,
748 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
749 }
750
751 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
752 pid, seq, flags);
753 err:
754 return ret;
755 }
756
757 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
758 u32 pid, u32 seq, u16 flags)
759 {
760 int ret = -EINVAL;
761
762 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
763 return ret;
764
765 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
766 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
767
768 return ret;
769 }
770
771 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
772 u32 pid, u32 seq, u16 flags, int dir)
773 {
774 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
775 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
776 int ret = -EINVAL;
777 int i;
778 u8 pgid;
779 u8 up_map;
780 u8 prio;
781 u8 tc_pct;
782
783 if (!tb[DCB_ATTR_PG_CFG] ||
784 !netdev->dcbnl_ops->setpgtccfgtx ||
785 !netdev->dcbnl_ops->setpgtccfgrx ||
786 !netdev->dcbnl_ops->setpgbwgcfgtx ||
787 !netdev->dcbnl_ops->setpgbwgcfgrx)
788 return ret;
789
790 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
791 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
792 if (ret)
793 goto err;
794
795 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
796 if (!pg_tb[i])
797 continue;
798
799 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
800 pg_tb[i], dcbnl_tc_param_nest);
801 if (ret)
802 goto err;
803
804 pgid = DCB_ATTR_VALUE_UNDEFINED;
805 prio = DCB_ATTR_VALUE_UNDEFINED;
806 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
807 up_map = DCB_ATTR_VALUE_UNDEFINED;
808
809 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
810 prio =
811 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
812
813 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
814 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
815
816 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
817 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
818
819 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
820 up_map =
821 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
822
823 /* dir: Tx = 0, Rx = 1 */
824 if (dir) {
825 /* Rx */
826 netdev->dcbnl_ops->setpgtccfgrx(netdev,
827 i - DCB_PG_ATTR_TC_0,
828 prio, pgid, tc_pct, up_map);
829 } else {
830 /* Tx */
831 netdev->dcbnl_ops->setpgtccfgtx(netdev,
832 i - DCB_PG_ATTR_TC_0,
833 prio, pgid, tc_pct, up_map);
834 }
835 }
836
837 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
838 if (!pg_tb[i])
839 continue;
840
841 tc_pct = nla_get_u8(pg_tb[i]);
842
843 /* dir: Tx = 0, Rx = 1 */
844 if (dir) {
845 /* Rx */
846 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
847 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
848 } else {
849 /* Tx */
850 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
851 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
852 }
853 }
854
855 ret = dcbnl_reply(0, RTM_SETDCB,
856 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
857 DCB_ATTR_PG_CFG, pid, seq, flags);
858
859 err:
860 return ret;
861 }
862
863 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
864 u32 pid, u32 seq, u16 flags)
865 {
866 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
867 }
868
869 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
870 u32 pid, u32 seq, u16 flags)
871 {
872 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
873 }
874
875 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
876 u32 pid, u32 seq, u16 flags)
877 {
878 struct sk_buff *dcbnl_skb;
879 struct nlmsghdr *nlh;
880 struct dcbmsg *dcb;
881 struct nlattr *bcn_nest;
882 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
883 u8 value_byte;
884 u32 value_integer;
885 int ret = -EINVAL;
886 bool getall = false;
887 int i;
888
889 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
890 !netdev->dcbnl_ops->getbcncfg)
891 return ret;
892
893 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
894 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
895
896 if (ret)
897 goto err_out;
898
899 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
900 if (!dcbnl_skb)
901 goto err_out;
902
903 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
904
905 dcb = NLMSG_DATA(nlh);
906 dcb->dcb_family = AF_UNSPEC;
907 dcb->cmd = DCB_CMD_BCN_GCFG;
908
909 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
910 if (!bcn_nest)
911 goto err;
912
913 if (bcn_tb[DCB_BCN_ATTR_ALL])
914 getall = true;
915
916 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
917 if (!getall && !bcn_tb[i])
918 continue;
919
920 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
921 &value_byte);
922 ret = nla_put_u8(dcbnl_skb, i, value_byte);
923 if (ret)
924 goto err_bcn;
925 }
926
927 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
928 if (!getall && !bcn_tb[i])
929 continue;
930
931 netdev->dcbnl_ops->getbcncfg(netdev, i,
932 &value_integer);
933 ret = nla_put_u32(dcbnl_skb, i, value_integer);
934 if (ret)
935 goto err_bcn;
936 }
937
938 nla_nest_end(dcbnl_skb, bcn_nest);
939
940 nlmsg_end(dcbnl_skb, nlh);
941
942 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
943 if (ret)
944 goto err;
945
946 return 0;
947
948 err_bcn:
949 nla_nest_cancel(dcbnl_skb, bcn_nest);
950 nlmsg_failure:
951 err:
952 kfree_skb(dcbnl_skb);
953 err_out:
954 ret = -EINVAL;
955 return ret;
956 }
957
958 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
959 u32 pid, u32 seq, u16 flags)
960 {
961 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
962 int i;
963 int ret = -EINVAL;
964 u8 value_byte;
965 u32 value_int;
966
967 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg
968 || !netdev->dcbnl_ops->setbcnrp)
969 return ret;
970
971 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
972 tb[DCB_ATTR_BCN],
973 dcbnl_pfc_up_nest);
974 if (ret)
975 goto err;
976
977 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
978 if (data[i] == NULL)
979 continue;
980 value_byte = nla_get_u8(data[i]);
981 netdev->dcbnl_ops->setbcnrp(netdev,
982 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
983 }
984
985 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
986 if (data[i] == NULL)
987 continue;
988 value_int = nla_get_u32(data[i]);
989 netdev->dcbnl_ops->setbcncfg(netdev,
990 i, value_int);
991 }
992
993 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
994 pid, seq, flags);
995 err:
996 return ret;
997 }
998
999 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1000 {
1001 struct net *net = sock_net(skb->sk);
1002 struct net_device *netdev;
1003 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1004 struct nlattr *tb[DCB_ATTR_MAX + 1];
1005 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1006 int ret = -EINVAL;
1007
1008 if (net != &init_net)
1009 return -EINVAL;
1010
1011 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1012 dcbnl_rtnl_policy);
1013 if (ret < 0)
1014 return ret;
1015
1016 if (!tb[DCB_ATTR_IFNAME])
1017 return -EINVAL;
1018
1019 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1020 if (!netdev)
1021 return -EINVAL;
1022
1023 if (!netdev->dcbnl_ops)
1024 goto errout;
1025
1026 switch (dcb->cmd) {
1027 case DCB_CMD_GSTATE:
1028 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1029 nlh->nlmsg_flags);
1030 goto out;
1031 case DCB_CMD_PFC_GCFG:
1032 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1033 nlh->nlmsg_flags);
1034 goto out;
1035 case DCB_CMD_GPERM_HWADDR:
1036 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1037 nlh->nlmsg_flags);
1038 goto out;
1039 case DCB_CMD_PGTX_GCFG:
1040 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1041 nlh->nlmsg_flags);
1042 goto out;
1043 case DCB_CMD_PGRX_GCFG:
1044 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1045 nlh->nlmsg_flags);
1046 goto out;
1047 case DCB_CMD_BCN_GCFG:
1048 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1049 nlh->nlmsg_flags);
1050 goto out;
1051 case DCB_CMD_SSTATE:
1052 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1053 nlh->nlmsg_flags);
1054 goto out;
1055 case DCB_CMD_PFC_SCFG:
1056 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1057 nlh->nlmsg_flags);
1058 goto out;
1059
1060 case DCB_CMD_SET_ALL:
1061 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1062 nlh->nlmsg_flags);
1063 goto out;
1064 case DCB_CMD_PGTX_SCFG:
1065 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1066 nlh->nlmsg_flags);
1067 goto out;
1068 case DCB_CMD_PGRX_SCFG:
1069 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1070 nlh->nlmsg_flags);
1071 goto out;
1072 case DCB_CMD_GCAP:
1073 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1074 nlh->nlmsg_flags);
1075 goto out;
1076 case DCB_CMD_GNUMTCS:
1077 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1078 nlh->nlmsg_flags);
1079 goto out;
1080 case DCB_CMD_SNUMTCS:
1081 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1082 nlh->nlmsg_flags);
1083 goto out;
1084 case DCB_CMD_PFC_GSTATE:
1085 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1086 nlh->nlmsg_flags);
1087 goto out;
1088 case DCB_CMD_PFC_SSTATE:
1089 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1090 nlh->nlmsg_flags);
1091 goto out;
1092 case DCB_CMD_BCN_SCFG:
1093 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1094 nlh->nlmsg_flags);
1095 goto out;
1096 default:
1097 goto errout;
1098 }
1099 errout:
1100 ret = -EINVAL;
1101 out:
1102 dev_put(netdev);
1103 return ret;
1104 }
1105
1106 static int __init dcbnl_init(void)
1107 {
1108 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1109 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1110
1111 return 0;
1112 }
1113 module_init(dcbnl_init);
1114
1115 static void __exit dcbnl_exit(void)
1116 {
1117 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1118 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1119 }
1120 module_exit(dcbnl_exit);
1121
1122
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK