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fs/ext4/inode.c: use pr_warn_ratelimited()
[linux/fpc-iii.git] / net / dcb / dcbnl.c
blobd900ab99814a7e54d8d2d9e14cd828314dd4e7ce
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 <linux/slab.h>
23 #include <net/netlink.h>
24 #include <net/rtnetlink.h>
25 #include <linux/dcbnl.h>
26 #include <net/dcbevent.h>
27 #include <linux/rtnetlink.h>
28 #include <net/sock.h>
29
30 /**
31 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
32 * intended to allow network traffic with differing requirements
33 * (highly reliable, no drops vs. best effort vs. low latency) to operate
34 * and co-exist on Ethernet. Current DCB features are:
35 *
36 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
37 * framework for assigning bandwidth guarantees to traffic classes.
38 *
39 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
40 * can work independently for each 802.1p priority.
41 *
42 * Congestion Notification - provides a mechanism for end-to-end congestion
43 * control for protocols which do not have built-in congestion management.
44 *
45 * More information about the emerging standards for these Ethernet features
46 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
47 *
48 * This file implements an rtnetlink interface to allow configuration of DCB
49 * features for capable devices.
50 */
51
52 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
53 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
54 MODULE_LICENSE("GPL");
55
56 /**************** DCB attribute policies *************************************/
57
58 /* DCB netlink attributes policy */
59 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
60 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
61 [DCB_ATTR_STATE] = {.type = NLA_U8},
62 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
63 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
64 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
65 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
66 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
67 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
68 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
69 [DCB_ATTR_APP] = {.type = NLA_NESTED},
70 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
71 [DCB_ATTR_DCBX] = {.type = NLA_U8},
72 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
73 };
74
75 /* DCB priority flow control to User Priority nested attributes */
76 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
77 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
85 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
86 };
87
88 /* DCB priority grouping nested attributes */
89 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
90 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
99 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
107 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
108 };
109
110 /* DCB traffic class nested attributes. */
111 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
112 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
113 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
116 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
117 };
118
119 /* DCB capabilities nested attributes. */
120 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
121 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
122 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
123 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
129 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
130 };
131
132 /* DCB capabilities nested attributes. */
133 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
134 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
135 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
136 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
137 };
138
139 /* DCB BCN nested attributes. */
140 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
141 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
149 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
150 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
165 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
166 };
167
168 /* DCB APP nested attributes. */
169 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
170 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
171 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
172 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
173 };
174
175 /* IEEE 802.1Qaz nested attributes. */
176 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
177 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
178 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
179 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
180 };
181
182 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
183 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
184 };
185
186 /* DCB number of traffic classes nested attributes. */
187 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
188 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
189 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
190 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
191 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
192 };
193
194 static LIST_HEAD(dcb_app_list);
195 static DEFINE_SPINLOCK(dcb_lock);
196
197 /* standard netlink reply call */
198 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
199 u32 seq, u16 flags)
200 {
201 struct sk_buff *dcbnl_skb;
202 struct dcbmsg *dcb;
203 struct nlmsghdr *nlh;
204 int ret = -EINVAL;
205
206 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
207 if (!dcbnl_skb)
208 return ret;
209
210 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
211
212 dcb = NLMSG_DATA(nlh);
213 dcb->dcb_family = AF_UNSPEC;
214 dcb->cmd = cmd;
215 dcb->dcb_pad = 0;
216
217 ret = nla_put_u8(dcbnl_skb, attr, value);
218 if (ret)
219 goto err;
220
221 /* end the message, assign the nlmsg_len. */
222 nlmsg_end(dcbnl_skb, nlh);
223 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
224 if (ret)
225 return -EINVAL;
226
227 return 0;
228 nlmsg_failure:
229 err:
230 kfree_skb(dcbnl_skb);
231 return ret;
232 }
233
234 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
235 u32 pid, u32 seq, u16 flags)
236 {
237 int ret = -EINVAL;
238
239 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
240 if (!netdev->dcbnl_ops->getstate)
241 return ret;
242
243 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
244 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
245
246 return ret;
247 }
248
249 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
250 u32 pid, u32 seq, u16 flags)
251 {
252 struct sk_buff *dcbnl_skb;
253 struct nlmsghdr *nlh;
254 struct dcbmsg *dcb;
255 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
256 u8 value;
257 int ret = -EINVAL;
258 int i;
259 int getall = 0;
260
261 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
262 return ret;
263
264 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
265 tb[DCB_ATTR_PFC_CFG],
266 dcbnl_pfc_up_nest);
267 if (ret)
268 goto err_out;
269
270 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
271 if (!dcbnl_skb)
272 goto err_out;
273
274 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
275
276 dcb = NLMSG_DATA(nlh);
277 dcb->dcb_family = AF_UNSPEC;
278 dcb->cmd = DCB_CMD_PFC_GCFG;
279
280 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
281 if (!nest)
282 goto err;
283
284 if (data[DCB_PFC_UP_ATTR_ALL])
285 getall = 1;
286
287 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
288 if (!getall && !data[i])
289 continue;
290
291 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
292 &value);
293 ret = nla_put_u8(dcbnl_skb, i, value);
294
295 if (ret) {
296 nla_nest_cancel(dcbnl_skb, nest);
297 goto err;
298 }
299 }
300 nla_nest_end(dcbnl_skb, nest);
301
302 nlmsg_end(dcbnl_skb, nlh);
303
304 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
305 if (ret)
306 goto err_out;
307
308 return 0;
309 nlmsg_failure:
310 err:
311 kfree_skb(dcbnl_skb);
312 err_out:
313 return -EINVAL;
314 }
315
316 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
317 u32 pid, u32 seq, u16 flags)
318 {
319 struct sk_buff *dcbnl_skb;
320 struct nlmsghdr *nlh;
321 struct dcbmsg *dcb;
322 u8 perm_addr[MAX_ADDR_LEN];
323 int ret = -EINVAL;
324
325 if (!netdev->dcbnl_ops->getpermhwaddr)
326 return ret;
327
328 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
329 if (!dcbnl_skb)
330 goto err_out;
331
332 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
333
334 dcb = NLMSG_DATA(nlh);
335 dcb->dcb_family = AF_UNSPEC;
336 dcb->cmd = DCB_CMD_GPERM_HWADDR;
337
338 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
339
340 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
341 perm_addr);
342
343 nlmsg_end(dcbnl_skb, nlh);
344
345 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
346 if (ret)
347 goto err_out;
348
349 return 0;
350
351 nlmsg_failure:
352 kfree_skb(dcbnl_skb);
353 err_out:
354 return -EINVAL;
355 }
356
357 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
358 u32 pid, u32 seq, u16 flags)
359 {
360 struct sk_buff *dcbnl_skb;
361 struct nlmsghdr *nlh;
362 struct dcbmsg *dcb;
363 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
364 u8 value;
365 int ret = -EINVAL;
366 int i;
367 int getall = 0;
368
369 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
370 return ret;
371
372 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
373 dcbnl_cap_nest);
374 if (ret)
375 goto err_out;
376
377 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
378 if (!dcbnl_skb)
379 goto err_out;
380
381 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
382
383 dcb = NLMSG_DATA(nlh);
384 dcb->dcb_family = AF_UNSPEC;
385 dcb->cmd = DCB_CMD_GCAP;
386
387 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
388 if (!nest)
389 goto err;
390
391 if (data[DCB_CAP_ATTR_ALL])
392 getall = 1;
393
394 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
395 if (!getall && !data[i])
396 continue;
397
398 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
399 ret = nla_put_u8(dcbnl_skb, i, value);
400
401 if (ret) {
402 nla_nest_cancel(dcbnl_skb, nest);
403 goto err;
404 }
405 }
406 }
407 nla_nest_end(dcbnl_skb, nest);
408
409 nlmsg_end(dcbnl_skb, nlh);
410
411 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
412 if (ret)
413 goto err_out;
414
415 return 0;
416 nlmsg_failure:
417 err:
418 kfree_skb(dcbnl_skb);
419 err_out:
420 return -EINVAL;
421 }
422
423 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
424 u32 pid, u32 seq, u16 flags)
425 {
426 struct sk_buff *dcbnl_skb;
427 struct nlmsghdr *nlh;
428 struct dcbmsg *dcb;
429 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
430 u8 value;
431 int ret = -EINVAL;
432 int i;
433 int getall = 0;
434
435 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
436 return ret;
437
438 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
439 dcbnl_numtcs_nest);
440 if (ret) {
441 ret = -EINVAL;
442 goto err_out;
443 }
444
445 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
446 if (!dcbnl_skb) {
447 ret = -EINVAL;
448 goto err_out;
449 }
450
451 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
452
453 dcb = NLMSG_DATA(nlh);
454 dcb->dcb_family = AF_UNSPEC;
455 dcb->cmd = DCB_CMD_GNUMTCS;
456
457 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
458 if (!nest) {
459 ret = -EINVAL;
460 goto err;
461 }
462
463 if (data[DCB_NUMTCS_ATTR_ALL])
464 getall = 1;
465
466 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
467 if (!getall && !data[i])
468 continue;
469
470 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
471 if (!ret) {
472 ret = nla_put_u8(dcbnl_skb, i, value);
473
474 if (ret) {
475 nla_nest_cancel(dcbnl_skb, nest);
476 ret = -EINVAL;
477 goto err;
478 }
479 } else {
480 goto err;
481 }
482 }
483 nla_nest_end(dcbnl_skb, nest);
484
485 nlmsg_end(dcbnl_skb, nlh);
486
487 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
488 if (ret) {
489 ret = -EINVAL;
490 goto err_out;
491 }
492
493 return 0;
494 nlmsg_failure:
495 err:
496 kfree_skb(dcbnl_skb);
497 err_out:
498 return ret;
499 }
500
501 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
502 u32 pid, u32 seq, u16 flags)
503 {
504 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
505 int ret = -EINVAL;
506 u8 value;
507 int i;
508
509 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
510 return ret;
511
512 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
513 dcbnl_numtcs_nest);
514
515 if (ret) {
516 ret = -EINVAL;
517 goto err;
518 }
519
520 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
521 if (data[i] == NULL)
522 continue;
523
524 value = nla_get_u8(data[i]);
525
526 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
527
528 if (ret)
529 goto operr;
530 }
531
532 operr:
533 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
534 DCB_ATTR_NUMTCS, pid, seq, flags);
535
536 err:
537 return ret;
538 }
539
540 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
541 u32 pid, u32 seq, u16 flags)
542 {
543 int ret = -EINVAL;
544
545 if (!netdev->dcbnl_ops->getpfcstate)
546 return ret;
547
548 ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
549 DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
550 pid, seq, flags);
551
552 return ret;
553 }
554
555 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
556 u32 pid, u32 seq, u16 flags)
557 {
558 int ret = -EINVAL;
559 u8 value;
560
561 if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
562 return ret;
563
564 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
565
566 netdev->dcbnl_ops->setpfcstate(netdev, value);
567
568 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
569 pid, seq, flags);
570
571 return ret;
572 }
573
574 static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
575 u32 pid, u32 seq, u16 flags)
576 {
577 struct sk_buff *dcbnl_skb;
578 struct nlmsghdr *nlh;
579 struct dcbmsg *dcb;
580 struct nlattr *app_nest;
581 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
582 u16 id;
583 u8 up, idtype;
584 int ret = -EINVAL;
585
586 if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->getapp)
587 goto out;
588
589 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
590 dcbnl_app_nest);
591 if (ret)
592 goto out;
593
594 ret = -EINVAL;
595 /* all must be non-null */
596 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
597 (!app_tb[DCB_APP_ATTR_ID]))
598 goto out;
599
600 /* either by eth type or by socket number */
601 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
602 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
603 (idtype != DCB_APP_IDTYPE_PORTNUM))
604 goto out;
605
606 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
607 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
608
609 /* send this back */
610 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
611 if (!dcbnl_skb)
612 goto out;
613
614 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
615 dcb = NLMSG_DATA(nlh);
616 dcb->dcb_family = AF_UNSPEC;
617 dcb->cmd = DCB_CMD_GAPP;
618
619 app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
620 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
621 if (ret)
622 goto out_cancel;
623
624 ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
625 if (ret)
626 goto out_cancel;
627
628 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
629 if (ret)
630 goto out_cancel;
631
632 nla_nest_end(dcbnl_skb, app_nest);
633 nlmsg_end(dcbnl_skb, nlh);
634
635 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
636 if (ret)
637 goto nlmsg_failure;
638
639 goto out;
640
641 out_cancel:
642 nla_nest_cancel(dcbnl_skb, app_nest);
643 nlmsg_failure:
644 kfree_skb(dcbnl_skb);
645 out:
646 return ret;
647 }
648
649 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
650 u32 pid, u32 seq, u16 flags)
651 {
652 int err, ret = -EINVAL;
653 u16 id;
654 u8 up, idtype;
655 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
656
657 if (!tb[DCB_ATTR_APP])
658 goto out;
659
660 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
661 dcbnl_app_nest);
662 if (ret)
663 goto out;
664
665 ret = -EINVAL;
666 /* all must be non-null */
667 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
668 (!app_tb[DCB_APP_ATTR_ID]) ||
669 (!app_tb[DCB_APP_ATTR_PRIORITY]))
670 goto out;
671
672 /* either by eth type or by socket number */
673 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
674 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
675 (idtype != DCB_APP_IDTYPE_PORTNUM))
676 goto out;
677
678 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
679 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
680
681 if (netdev->dcbnl_ops->setapp) {
682 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
683 } else {
684 struct dcb_app app;
685 app.selector = idtype;
686 app.protocol = id;
687 app.priority = up;
688 err = dcb_setapp(netdev, &app);
689 }
690
691 ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
692 pid, seq, flags);
693 out:
694 return ret;
695 }
696
697 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
698 u32 pid, u32 seq, u16 flags, int dir)
699 {
700 struct sk_buff *dcbnl_skb;
701 struct nlmsghdr *nlh;
702 struct dcbmsg *dcb;
703 struct nlattr *pg_nest, *param_nest, *data;
704 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
705 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
706 u8 prio, pgid, tc_pct, up_map;
707 int ret = -EINVAL;
708 int getall = 0;
709 int i;
710
711 if (!tb[DCB_ATTR_PG_CFG] ||
712 !netdev->dcbnl_ops->getpgtccfgtx ||
713 !netdev->dcbnl_ops->getpgtccfgrx ||
714 !netdev->dcbnl_ops->getpgbwgcfgtx ||
715 !netdev->dcbnl_ops->getpgbwgcfgrx)
716 return ret;
717
718 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
719 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
720
721 if (ret)
722 goto err_out;
723
724 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
725 if (!dcbnl_skb)
726 goto err_out;
727
728 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
729
730 dcb = NLMSG_DATA(nlh);
731 dcb->dcb_family = AF_UNSPEC;
732 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
733
734 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
735 if (!pg_nest)
736 goto err;
737
738 if (pg_tb[DCB_PG_ATTR_TC_ALL])
739 getall = 1;
740
741 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
742 if (!getall && !pg_tb[i])
743 continue;
744
745 if (pg_tb[DCB_PG_ATTR_TC_ALL])
746 data = pg_tb[DCB_PG_ATTR_TC_ALL];
747 else
748 data = pg_tb[i];
749 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
750 data, dcbnl_tc_param_nest);
751 if (ret)
752 goto err_pg;
753
754 param_nest = nla_nest_start(dcbnl_skb, i);
755 if (!param_nest)
756 goto err_pg;
757
758 pgid = DCB_ATTR_VALUE_UNDEFINED;
759 prio = DCB_ATTR_VALUE_UNDEFINED;
760 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
761 up_map = DCB_ATTR_VALUE_UNDEFINED;
762
763 if (dir) {
764 /* Rx */
765 netdev->dcbnl_ops->getpgtccfgrx(netdev,
766 i - DCB_PG_ATTR_TC_0, &prio,
767 &pgid, &tc_pct, &up_map);
768 } else {
769 /* Tx */
770 netdev->dcbnl_ops->getpgtccfgtx(netdev,
771 i - DCB_PG_ATTR_TC_0, &prio,
772 &pgid, &tc_pct, &up_map);
773 }
774
775 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
776 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
777 ret = nla_put_u8(dcbnl_skb,
778 DCB_TC_ATTR_PARAM_PGID, pgid);
779 if (ret)
780 goto err_param;
781 }
782 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
783 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
784 ret = nla_put_u8(dcbnl_skb,
785 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
786 if (ret)
787 goto err_param;
788 }
789 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
790 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
791 ret = nla_put_u8(dcbnl_skb,
792 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
793 if (ret)
794 goto err_param;
795 }
796 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
797 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
798 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
799 tc_pct);
800 if (ret)
801 goto err_param;
802 }
803 nla_nest_end(dcbnl_skb, param_nest);
804 }
805
806 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
807 getall = 1;
808 else
809 getall = 0;
810
811 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
812 if (!getall && !pg_tb[i])
813 continue;
814
815 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
816
817 if (dir) {
818 /* Rx */
819 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
820 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
821 } else {
822 /* Tx */
823 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
824 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
825 }
826 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
827
828 if (ret)
829 goto err_pg;
830 }
831
832 nla_nest_end(dcbnl_skb, pg_nest);
833
834 nlmsg_end(dcbnl_skb, nlh);
835
836 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
837 if (ret)
838 goto err_out;
839
840 return 0;
841
842 err_param:
843 nla_nest_cancel(dcbnl_skb, param_nest);
844 err_pg:
845 nla_nest_cancel(dcbnl_skb, pg_nest);
846 nlmsg_failure:
847 err:
848 kfree_skb(dcbnl_skb);
849 err_out:
850 ret = -EINVAL;
851 return ret;
852 }
853
854 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
855 u32 pid, u32 seq, u16 flags)
856 {
857 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
858 }
859
860 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
861 u32 pid, u32 seq, u16 flags)
862 {
863 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
864 }
865
866 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
867 u32 pid, u32 seq, u16 flags)
868 {
869 int ret = -EINVAL;
870 u8 value;
871
872 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
873 return ret;
874
875 value = nla_get_u8(tb[DCB_ATTR_STATE]);
876
877 ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
878 RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
879 pid, seq, flags);
880
881 return ret;
882 }
883
884 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
885 u32 pid, u32 seq, u16 flags)
886 {
887 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
888 int i;
889 int ret = -EINVAL;
890 u8 value;
891
892 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
893 return ret;
894
895 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
896 tb[DCB_ATTR_PFC_CFG],
897 dcbnl_pfc_up_nest);
898 if (ret)
899 goto err;
900
901 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
902 if (data[i] == NULL)
903 continue;
904 value = nla_get_u8(data[i]);
905 netdev->dcbnl_ops->setpfccfg(netdev,
906 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
907 }
908
909 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
910 pid, seq, flags);
911 err:
912 return ret;
913 }
914
915 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
916 u32 pid, u32 seq, u16 flags)
917 {
918 int ret = -EINVAL;
919
920 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
921 return ret;
922
923 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
924 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
925
926 return ret;
927 }
928
929 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
930 u32 pid, u32 seq, u16 flags, int dir)
931 {
932 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
933 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
934 int ret = -EINVAL;
935 int i;
936 u8 pgid;
937 u8 up_map;
938 u8 prio;
939 u8 tc_pct;
940
941 if (!tb[DCB_ATTR_PG_CFG] ||
942 !netdev->dcbnl_ops->setpgtccfgtx ||
943 !netdev->dcbnl_ops->setpgtccfgrx ||
944 !netdev->dcbnl_ops->setpgbwgcfgtx ||
945 !netdev->dcbnl_ops->setpgbwgcfgrx)
946 return ret;
947
948 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
949 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
950 if (ret)
951 goto err;
952
953 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
954 if (!pg_tb[i])
955 continue;
956
957 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
958 pg_tb[i], dcbnl_tc_param_nest);
959 if (ret)
960 goto err;
961
962 pgid = DCB_ATTR_VALUE_UNDEFINED;
963 prio = DCB_ATTR_VALUE_UNDEFINED;
964 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
965 up_map = DCB_ATTR_VALUE_UNDEFINED;
966
967 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
968 prio =
969 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
970
971 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
972 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
973
974 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
975 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
976
977 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
978 up_map =
979 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
980
981 /* dir: Tx = 0, Rx = 1 */
982 if (dir) {
983 /* Rx */
984 netdev->dcbnl_ops->setpgtccfgrx(netdev,
985 i - DCB_PG_ATTR_TC_0,
986 prio, pgid, tc_pct, up_map);
987 } else {
988 /* Tx */
989 netdev->dcbnl_ops->setpgtccfgtx(netdev,
990 i - DCB_PG_ATTR_TC_0,
991 prio, pgid, tc_pct, up_map);
992 }
993 }
994
995 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
996 if (!pg_tb[i])
997 continue;
998
999 tc_pct = nla_get_u8(pg_tb[i]);
1000
1001 /* dir: Tx = 0, Rx = 1 */
1002 if (dir) {
1003 /* Rx */
1004 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1005 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1006 } else {
1007 /* Tx */
1008 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1009 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1010 }
1011 }
1012
1013 ret = dcbnl_reply(0, RTM_SETDCB,
1014 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1015 DCB_ATTR_PG_CFG, pid, seq, flags);
1016
1017 err:
1018 return ret;
1019 }
1020
1021 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1022 u32 pid, u32 seq, u16 flags)
1023 {
1024 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1025 }
1026
1027 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1028 u32 pid, u32 seq, u16 flags)
1029 {
1030 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1031 }
1032
1033 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1034 u32 pid, u32 seq, u16 flags)
1035 {
1036 struct sk_buff *dcbnl_skb;
1037 struct nlmsghdr *nlh;
1038 struct dcbmsg *dcb;
1039 struct nlattr *bcn_nest;
1040 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1041 u8 value_byte;
1042 u32 value_integer;
1043 int ret = -EINVAL;
1044 bool getall = false;
1045 int i;
1046
1047 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1048 !netdev->dcbnl_ops->getbcncfg)
1049 return ret;
1050
1051 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1052 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1053
1054 if (ret)
1055 goto err_out;
1056
1057 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1058 if (!dcbnl_skb)
1059 goto err_out;
1060
1061 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1062
1063 dcb = NLMSG_DATA(nlh);
1064 dcb->dcb_family = AF_UNSPEC;
1065 dcb->cmd = DCB_CMD_BCN_GCFG;
1066
1067 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1068 if (!bcn_nest)
1069 goto err;
1070
1071 if (bcn_tb[DCB_BCN_ATTR_ALL])
1072 getall = true;
1073
1074 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1075 if (!getall && !bcn_tb[i])
1076 continue;
1077
1078 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1079 &value_byte);
1080 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1081 if (ret)
1082 goto err_bcn;
1083 }
1084
1085 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1086 if (!getall && !bcn_tb[i])
1087 continue;
1088
1089 netdev->dcbnl_ops->getbcncfg(netdev, i,
1090 &value_integer);
1091 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1092 if (ret)
1093 goto err_bcn;
1094 }
1095
1096 nla_nest_end(dcbnl_skb, bcn_nest);
1097
1098 nlmsg_end(dcbnl_skb, nlh);
1099
1100 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1101 if (ret)
1102 goto err_out;
1103
1104 return 0;
1105
1106 err_bcn:
1107 nla_nest_cancel(dcbnl_skb, bcn_nest);
1108 nlmsg_failure:
1109 err:
1110 kfree_skb(dcbnl_skb);
1111 err_out:
1112 ret = -EINVAL;
1113 return ret;
1114 }
1115
1116 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1117 u32 pid, u32 seq, u16 flags)
1118 {
1119 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1120 int i;
1121 int ret = -EINVAL;
1122 u8 value_byte;
1123 u32 value_int;
1124
1125 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1126 !netdev->dcbnl_ops->setbcnrp)
1127 return ret;
1128
1129 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1130 tb[DCB_ATTR_BCN],
1131 dcbnl_pfc_up_nest);
1132 if (ret)
1133 goto err;
1134
1135 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1136 if (data[i] == NULL)
1137 continue;
1138 value_byte = nla_get_u8(data[i]);
1139 netdev->dcbnl_ops->setbcnrp(netdev,
1140 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1141 }
1142
1143 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1144 if (data[i] == NULL)
1145 continue;
1146 value_int = nla_get_u32(data[i]);
1147 netdev->dcbnl_ops->setbcncfg(netdev,
1148 i, value_int);
1149 }
1150
1151 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1152 pid, seq, flags);
1153 err:
1154 return ret;
1155 }
1156
1157 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1158 * be completed the entire msg is aborted and error value is returned.
1159 * No attempt is made to reconcile the case where only part of the
1160 * cmd can be completed.
1161 */
1162 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1163 u32 pid, u32 seq, u16 flags)
1164 {
1165 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1166 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1167 int err = -EOPNOTSUPP;
1168
1169 if (!ops)
1170 goto err;
1171
1172 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1173 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1174 if (err)
1175 goto err;
1176
1177 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1178 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1179 err = ops->ieee_setets(netdev, ets);
1180 if (err)
1181 goto err;
1182 }
1183
1184 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setets) {
1185 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1186 err = ops->ieee_setpfc(netdev, pfc);
1187 if (err)
1188 goto err;
1189 }
1190
1191 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1192 struct nlattr *attr;
1193 int rem;
1194
1195 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1196 struct dcb_app *app_data;
1197 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1198 continue;
1199 app_data = nla_data(attr);
1200 if (ops->ieee_setapp)
1201 err = ops->ieee_setapp(netdev, app_data);
1202 else
1203 err = dcb_setapp(netdev, app_data);
1204 if (err)
1205 goto err;
1206 }
1207 }
1208
1209 err:
1210 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1211 pid, seq, flags);
1212 return err;
1213 }
1214
1215
1216 /* Handle IEEE 802.1Qaz GET commands. */
1217 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1218 u32 pid, u32 seq, u16 flags)
1219 {
1220 struct sk_buff *skb;
1221 struct nlmsghdr *nlh;
1222 struct dcbmsg *dcb;
1223 struct nlattr *ieee, *app;
1224 struct dcb_app_type *itr;
1225 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1226 int err;
1227
1228 if (!ops)
1229 return -EOPNOTSUPP;
1230
1231 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1232 if (!skb)
1233 return -ENOBUFS;
1234
1235 nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1236
1237 dcb = NLMSG_DATA(nlh);
1238 dcb->dcb_family = AF_UNSPEC;
1239 dcb->cmd = DCB_CMD_IEEE_GET;
1240
1241 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1242
1243 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1244 if (!ieee)
1245 goto nla_put_failure;
1246
1247 if (ops->ieee_getets) {
1248 struct ieee_ets ets;
1249 err = ops->ieee_getets(netdev, &ets);
1250 if (!err)
1251 NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1252 }
1253
1254 if (ops->ieee_getpfc) {
1255 struct ieee_pfc pfc;
1256 err = ops->ieee_getpfc(netdev, &pfc);
1257 if (!err)
1258 NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1259 }
1260
1261 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1262 if (!app)
1263 goto nla_put_failure;
1264
1265 spin_lock(&dcb_lock);
1266 list_for_each_entry(itr, &dcb_app_list, list) {
1267 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1268 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1269 &itr->app);
1270 if (err) {
1271 spin_unlock(&dcb_lock);
1272 goto nla_put_failure;
1273 }
1274 }
1275 }
1276 spin_unlock(&dcb_lock);
1277 nla_nest_end(skb, app);
1278
1279 nla_nest_end(skb, ieee);
1280 nlmsg_end(skb, nlh);
1281
1282 return rtnl_unicast(skb, &init_net, pid);
1283 nla_put_failure:
1284 nlmsg_cancel(skb, nlh);
1285 nlmsg_failure:
1286 kfree_skb(skb);
1287 return -1;
1288 }
1289
1290 /* DCBX configuration */
1291 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1292 u32 pid, u32 seq, u16 flags)
1293 {
1294 int ret;
1295
1296 if (!netdev->dcbnl_ops->getdcbx)
1297 return -EOPNOTSUPP;
1298
1299 ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1300 DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1301
1302 return ret;
1303 }
1304
1305 static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1306 u32 pid, u32 seq, u16 flags)
1307 {
1308 int ret;
1309 u8 value;
1310
1311 if (!netdev->dcbnl_ops->setdcbx)
1312 return -EOPNOTSUPP;
1313
1314 if (!tb[DCB_ATTR_DCBX])
1315 return -EINVAL;
1316
1317 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1318
1319 ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1320 RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1321 pid, seq, flags);
1322
1323 return ret;
1324 }
1325
1326 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1327 u32 pid, u32 seq, u16 flags)
1328 {
1329 struct sk_buff *dcbnl_skb;
1330 struct nlmsghdr *nlh;
1331 struct dcbmsg *dcb;
1332 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1333 u8 value;
1334 int ret, i;
1335 int getall = 0;
1336
1337 if (!netdev->dcbnl_ops->getfeatcfg)
1338 return -EOPNOTSUPP;
1339
1340 if (!tb[DCB_ATTR_FEATCFG])
1341 return -EINVAL;
1342
1343 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1344 dcbnl_featcfg_nest);
1345 if (ret)
1346 goto err_out;
1347
1348 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1349 if (!dcbnl_skb) {
1350 ret = -ENOBUFS;
1351 goto err_out;
1352 }
1353
1354 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1355
1356 dcb = NLMSG_DATA(nlh);
1357 dcb->dcb_family = AF_UNSPEC;
1358 dcb->cmd = DCB_CMD_GFEATCFG;
1359
1360 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1361 if (!nest) {
1362 ret = -EMSGSIZE;
1363 goto nla_put_failure;
1364 }
1365
1366 if (data[DCB_FEATCFG_ATTR_ALL])
1367 getall = 1;
1368
1369 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1370 if (!getall && !data[i])
1371 continue;
1372
1373 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1374 if (!ret)
1375 ret = nla_put_u8(dcbnl_skb, i, value);
1376
1377 if (ret) {
1378 nla_nest_cancel(dcbnl_skb, nest);
1379 goto nla_put_failure;
1380 }
1381 }
1382 nla_nest_end(dcbnl_skb, nest);
1383
1384 nlmsg_end(dcbnl_skb, nlh);
1385
1386 return rtnl_unicast(dcbnl_skb, &init_net, pid);
1387 nla_put_failure:
1388 nlmsg_cancel(dcbnl_skb, nlh);
1389 nlmsg_failure:
1390 kfree_skb(dcbnl_skb);
1391 err_out:
1392 return ret;
1393 }
1394
1395 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1396 u32 pid, u32 seq, u16 flags)
1397 {
1398 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1399 int ret, i;
1400 u8 value;
1401
1402 if (!netdev->dcbnl_ops->setfeatcfg)
1403 return -ENOTSUPP;
1404
1405 if (!tb[DCB_ATTR_FEATCFG])
1406 return -EINVAL;
1407
1408 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1409 dcbnl_featcfg_nest);
1410
1411 if (ret)
1412 goto err;
1413
1414 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1415 if (data[i] == NULL)
1416 continue;
1417
1418 value = nla_get_u8(data[i]);
1419
1420 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1421
1422 if (ret)
1423 goto err;
1424 }
1425 err:
1426 dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1427 pid, seq, flags);
1428
1429 return ret;
1430 }
1431
1432 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1433 {
1434 struct net *net = sock_net(skb->sk);
1435 struct net_device *netdev;
1436 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1437 struct nlattr *tb[DCB_ATTR_MAX + 1];
1438 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1439 int ret = -EINVAL;
1440
1441 if (!net_eq(net, &init_net))
1442 return -EINVAL;
1443
1444 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1445 dcbnl_rtnl_policy);
1446 if (ret < 0)
1447 return ret;
1448
1449 if (!tb[DCB_ATTR_IFNAME])
1450 return -EINVAL;
1451
1452 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1453 if (!netdev)
1454 return -EINVAL;
1455
1456 if (!netdev->dcbnl_ops)
1457 goto errout;
1458
1459 switch (dcb->cmd) {
1460 case DCB_CMD_GSTATE:
1461 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1462 nlh->nlmsg_flags);
1463 goto out;
1464 case DCB_CMD_PFC_GCFG:
1465 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1466 nlh->nlmsg_flags);
1467 goto out;
1468 case DCB_CMD_GPERM_HWADDR:
1469 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1470 nlh->nlmsg_flags);
1471 goto out;
1472 case DCB_CMD_PGTX_GCFG:
1473 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1474 nlh->nlmsg_flags);
1475 goto out;
1476 case DCB_CMD_PGRX_GCFG:
1477 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1478 nlh->nlmsg_flags);
1479 goto out;
1480 case DCB_CMD_BCN_GCFG:
1481 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1482 nlh->nlmsg_flags);
1483 goto out;
1484 case DCB_CMD_SSTATE:
1485 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1486 nlh->nlmsg_flags);
1487 goto out;
1488 case DCB_CMD_PFC_SCFG:
1489 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1490 nlh->nlmsg_flags);
1491 goto out;
1492
1493 case DCB_CMD_SET_ALL:
1494 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1495 nlh->nlmsg_flags);
1496 goto out;
1497 case DCB_CMD_PGTX_SCFG:
1498 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1499 nlh->nlmsg_flags);
1500 goto out;
1501 case DCB_CMD_PGRX_SCFG:
1502 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1503 nlh->nlmsg_flags);
1504 goto out;
1505 case DCB_CMD_GCAP:
1506 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1507 nlh->nlmsg_flags);
1508 goto out;
1509 case DCB_CMD_GNUMTCS:
1510 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1511 nlh->nlmsg_flags);
1512 goto out;
1513 case DCB_CMD_SNUMTCS:
1514 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1515 nlh->nlmsg_flags);
1516 goto out;
1517 case DCB_CMD_PFC_GSTATE:
1518 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1519 nlh->nlmsg_flags);
1520 goto out;
1521 case DCB_CMD_PFC_SSTATE:
1522 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1523 nlh->nlmsg_flags);
1524 goto out;
1525 case DCB_CMD_BCN_SCFG:
1526 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1527 nlh->nlmsg_flags);
1528 goto out;
1529 case DCB_CMD_GAPP:
1530 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1531 nlh->nlmsg_flags);
1532 goto out;
1533 case DCB_CMD_SAPP:
1534 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1535 nlh->nlmsg_flags);
1536 goto out;
1537 case DCB_CMD_IEEE_SET:
1538 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1539 nlh->nlmsg_flags);
1540 goto out;
1541 case DCB_CMD_IEEE_GET:
1542 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
1543 nlh->nlmsg_flags);
1544 goto out;
1545 case DCB_CMD_GDCBX:
1546 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1547 nlh->nlmsg_flags);
1548 goto out;
1549 case DCB_CMD_SDCBX:
1550 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1551 nlh->nlmsg_flags);
1552 goto out;
1553 case DCB_CMD_GFEATCFG:
1554 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1555 nlh->nlmsg_flags);
1556 goto out;
1557 case DCB_CMD_SFEATCFG:
1558 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1559 nlh->nlmsg_flags);
1560 goto out;
1561 default:
1562 goto errout;
1563 }
1564 errout:
1565 ret = -EINVAL;
1566 out:
1567 dev_put(netdev);
1568 return ret;
1569 }
1570
1571 /**
1572 * dcb_getapp - retrieve the DCBX application user priority
1573 *
1574 * On success returns a non-zero 802.1p user priority bitmap
1575 * otherwise returns 0 as the invalid user priority bitmap to
1576 * indicate an error.
1577 */
1578 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1579 {
1580 struct dcb_app_type *itr;
1581 u8 prio = 0;
1582
1583 spin_lock(&dcb_lock);
1584 list_for_each_entry(itr, &dcb_app_list, list) {
1585 if (itr->app.selector == app->selector &&
1586 itr->app.protocol == app->protocol &&
1587 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1588 prio = itr->app.priority;
1589 break;
1590 }
1591 }
1592 spin_unlock(&dcb_lock);
1593
1594 return prio;
1595 }
1596 EXPORT_SYMBOL(dcb_getapp);
1597
1598 /**
1599 * ixgbe_dcbnl_setapp - add dcb application data to app list
1600 *
1601 * Priority 0 is the default priority this removes applications
1602 * from the app list if the priority is set to zero.
1603 */
1604 u8 dcb_setapp(struct net_device *dev, struct dcb_app *new)
1605 {
1606 struct dcb_app_type *itr;
1607
1608 spin_lock(&dcb_lock);
1609 /* Search for existing match and replace */
1610 list_for_each_entry(itr, &dcb_app_list, list) {
1611 if (itr->app.selector == new->selector &&
1612 itr->app.protocol == new->protocol &&
1613 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1614 if (new->priority)
1615 itr->app.priority = new->priority;
1616 else {
1617 list_del(&itr->list);
1618 kfree(itr);
1619 }
1620 goto out;
1621 }
1622 }
1623 /* App type does not exist add new application type */
1624 if (new->priority) {
1625 struct dcb_app_type *entry;
1626 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
1627 if (!entry) {
1628 spin_unlock(&dcb_lock);
1629 return -ENOMEM;
1630 }
1631
1632 memcpy(&entry->app, new, sizeof(*new));
1633 strncpy(entry->name, dev->name, IFNAMSIZ);
1634 list_add(&entry->list, &dcb_app_list);
1635 }
1636 out:
1637 spin_unlock(&dcb_lock);
1638 call_dcbevent_notifiers(DCB_APP_EVENT, new);
1639 return 0;
1640 }
1641 EXPORT_SYMBOL(dcb_setapp);
1642
1643 static void dcb_flushapp(void)
1644 {
1645 struct dcb_app_type *app;
1646 struct dcb_app_type *tmp;
1647
1648 spin_lock(&dcb_lock);
1649 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1650 list_del(&app->list);
1651 kfree(app);
1652 }
1653 spin_unlock(&dcb_lock);
1654 }
1655
1656 static int __init dcbnl_init(void)
1657 {
1658 INIT_LIST_HEAD(&dcb_app_list);
1659
1660 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1661 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1662
1663 return 0;
1664 }
1665 module_init(dcbnl_init);
1666
1667 static void __exit dcbnl_exit(void)
1668 {
1669 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1670 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1671 dcb_flushapp();
1672 }
1673 module_exit(dcbnl_exit);
Linux with added FPC-III support