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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
[linux-2.6/linux-2.6-stable.git] / net / dcb / dcbnl.c
blob3cb56af4e13c9945927f67d854c2f82467d8259a
1 /*
2 * Copyright (c) 2008-2011, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
16 *
17 * Author: Lucy Liu <lucy.liu@intel.com>
18 */
19
20 #include <linux/netdevice.h>
21 #include <linux/netlink.h>
22 #include <linux/slab.h>
23 #include <net/netlink.h>
24 #include <net/rtnetlink.h>
25 #include <linux/dcbnl.h>
26 #include <net/dcbevent.h>
27 #include <linux/rtnetlink.h>
28 #include <net/sock.h>
29
30 /**
31 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
32 * intended to allow network traffic with differing requirements
33 * (highly reliable, no drops vs. best effort vs. low latency) to operate
34 * and co-exist on Ethernet. Current DCB features are:
35 *
36 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
37 * framework for assigning bandwidth guarantees to traffic classes.
38 *
39 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
40 * can work independently for each 802.1p priority.
41 *
42 * Congestion Notification - provides a mechanism for end-to-end congestion
43 * control for protocols which do not have built-in congestion management.
44 *
45 * More information about the emerging standards for these Ethernet features
46 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
47 *
48 * This file implements an rtnetlink interface to allow configuration of DCB
49 * features for capable devices.
50 */
51
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])
587 goto out;
588
589 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
590 dcbnl_app_nest);
591 if (ret)
592 goto out;
593
594 ret = -EINVAL;
595 /* all must be non-null */
596 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
597 (!app_tb[DCB_APP_ATTR_ID]))
598 goto out;
599
600 /* either by eth type or by socket number */
601 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
602 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
603 (idtype != DCB_APP_IDTYPE_PORTNUM))
604 goto out;
605
606 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
607
608 if (netdev->dcbnl_ops->getapp) {
609 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
610 } else {
611 struct dcb_app app = {
612 .selector = idtype,
613 .protocol = id,
614 };
615 up = dcb_getapp(netdev, &app);
616 }
617
618 /* send this back */
619 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
620 if (!dcbnl_skb)
621 goto out;
622
623 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
624 dcb = NLMSG_DATA(nlh);
625 dcb->dcb_family = AF_UNSPEC;
626 dcb->cmd = DCB_CMD_GAPP;
627
628 app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
629 if (!app_nest)
630 goto out_cancel;
631
632 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
633 if (ret)
634 goto out_cancel;
635
636 ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
637 if (ret)
638 goto out_cancel;
639
640 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
641 if (ret)
642 goto out_cancel;
643
644 nla_nest_end(dcbnl_skb, app_nest);
645 nlmsg_end(dcbnl_skb, nlh);
646
647 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
648 if (ret)
649 goto nlmsg_failure;
650
651 goto out;
652
653 out_cancel:
654 nla_nest_cancel(dcbnl_skb, app_nest);
655 nlmsg_failure:
656 kfree_skb(dcbnl_skb);
657 out:
658 return ret;
659 }
660
661 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
662 u32 pid, u32 seq, u16 flags)
663 {
664 int err, ret = -EINVAL;
665 u16 id;
666 u8 up, idtype;
667 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
668
669 if (!tb[DCB_ATTR_APP])
670 goto out;
671
672 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
673 dcbnl_app_nest);
674 if (ret)
675 goto out;
676
677 ret = -EINVAL;
678 /* all must be non-null */
679 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
680 (!app_tb[DCB_APP_ATTR_ID]) ||
681 (!app_tb[DCB_APP_ATTR_PRIORITY]))
682 goto out;
683
684 /* either by eth type or by socket number */
685 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
686 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
687 (idtype != DCB_APP_IDTYPE_PORTNUM))
688 goto out;
689
690 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
691 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
692
693 if (netdev->dcbnl_ops->setapp) {
694 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
695 } else {
696 struct dcb_app app;
697 app.selector = idtype;
698 app.protocol = id;
699 app.priority = up;
700 err = dcb_setapp(netdev, &app);
701 }
702
703 ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
704 pid, seq, flags);
705 out:
706 return ret;
707 }
708
709 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
710 u32 pid, u32 seq, u16 flags, int dir)
711 {
712 struct sk_buff *dcbnl_skb;
713 struct nlmsghdr *nlh;
714 struct dcbmsg *dcb;
715 struct nlattr *pg_nest, *param_nest, *data;
716 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
717 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
718 u8 prio, pgid, tc_pct, up_map;
719 int ret = -EINVAL;
720 int getall = 0;
721 int i;
722
723 if (!tb[DCB_ATTR_PG_CFG] ||
724 !netdev->dcbnl_ops->getpgtccfgtx ||
725 !netdev->dcbnl_ops->getpgtccfgrx ||
726 !netdev->dcbnl_ops->getpgbwgcfgtx ||
727 !netdev->dcbnl_ops->getpgbwgcfgrx)
728 return ret;
729
730 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
731 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
732
733 if (ret)
734 goto err_out;
735
736 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
737 if (!dcbnl_skb)
738 goto err_out;
739
740 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
741
742 dcb = NLMSG_DATA(nlh);
743 dcb->dcb_family = AF_UNSPEC;
744 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
745
746 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
747 if (!pg_nest)
748 goto err;
749
750 if (pg_tb[DCB_PG_ATTR_TC_ALL])
751 getall = 1;
752
753 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
754 if (!getall && !pg_tb[i])
755 continue;
756
757 if (pg_tb[DCB_PG_ATTR_TC_ALL])
758 data = pg_tb[DCB_PG_ATTR_TC_ALL];
759 else
760 data = pg_tb[i];
761 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
762 data, dcbnl_tc_param_nest);
763 if (ret)
764 goto err_pg;
765
766 param_nest = nla_nest_start(dcbnl_skb, i);
767 if (!param_nest)
768 goto err_pg;
769
770 pgid = DCB_ATTR_VALUE_UNDEFINED;
771 prio = DCB_ATTR_VALUE_UNDEFINED;
772 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
773 up_map = DCB_ATTR_VALUE_UNDEFINED;
774
775 if (dir) {
776 /* Rx */
777 netdev->dcbnl_ops->getpgtccfgrx(netdev,
778 i - DCB_PG_ATTR_TC_0, &prio,
779 &pgid, &tc_pct, &up_map);
780 } else {
781 /* Tx */
782 netdev->dcbnl_ops->getpgtccfgtx(netdev,
783 i - DCB_PG_ATTR_TC_0, &prio,
784 &pgid, &tc_pct, &up_map);
785 }
786
787 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
788 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
789 ret = nla_put_u8(dcbnl_skb,
790 DCB_TC_ATTR_PARAM_PGID, pgid);
791 if (ret)
792 goto err_param;
793 }
794 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
795 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
796 ret = nla_put_u8(dcbnl_skb,
797 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
798 if (ret)
799 goto err_param;
800 }
801 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
802 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
803 ret = nla_put_u8(dcbnl_skb,
804 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
805 if (ret)
806 goto err_param;
807 }
808 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
809 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
810 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
811 tc_pct);
812 if (ret)
813 goto err_param;
814 }
815 nla_nest_end(dcbnl_skb, param_nest);
816 }
817
818 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
819 getall = 1;
820 else
821 getall = 0;
822
823 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
824 if (!getall && !pg_tb[i])
825 continue;
826
827 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
828
829 if (dir) {
830 /* Rx */
831 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
832 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
833 } else {
834 /* Tx */
835 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
836 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
837 }
838 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
839
840 if (ret)
841 goto err_pg;
842 }
843
844 nla_nest_end(dcbnl_skb, pg_nest);
845
846 nlmsg_end(dcbnl_skb, nlh);
847
848 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
849 if (ret)
850 goto err_out;
851
852 return 0;
853
854 err_param:
855 nla_nest_cancel(dcbnl_skb, param_nest);
856 err_pg:
857 nla_nest_cancel(dcbnl_skb, pg_nest);
858 nlmsg_failure:
859 err:
860 kfree_skb(dcbnl_skb);
861 err_out:
862 ret = -EINVAL;
863 return ret;
864 }
865
866 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
867 u32 pid, u32 seq, u16 flags)
868 {
869 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
870 }
871
872 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
873 u32 pid, u32 seq, u16 flags)
874 {
875 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
876 }
877
878 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
879 u32 pid, u32 seq, u16 flags)
880 {
881 int ret = -EINVAL;
882 u8 value;
883
884 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
885 return ret;
886
887 value = nla_get_u8(tb[DCB_ATTR_STATE]);
888
889 ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
890 RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
891 pid, seq, flags);
892
893 return ret;
894 }
895
896 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
897 u32 pid, u32 seq, u16 flags)
898 {
899 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
900 int i;
901 int ret = -EINVAL;
902 u8 value;
903
904 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
905 return ret;
906
907 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
908 tb[DCB_ATTR_PFC_CFG],
909 dcbnl_pfc_up_nest);
910 if (ret)
911 goto err;
912
913 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
914 if (data[i] == NULL)
915 continue;
916 value = nla_get_u8(data[i]);
917 netdev->dcbnl_ops->setpfccfg(netdev,
918 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
919 }
920
921 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
922 pid, seq, flags);
923 err:
924 return ret;
925 }
926
927 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
928 u32 pid, u32 seq, u16 flags)
929 {
930 int ret = -EINVAL;
931
932 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
933 return ret;
934
935 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
936 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
937
938 return ret;
939 }
940
941 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
942 u32 pid, u32 seq, u16 flags, int dir)
943 {
944 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
945 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
946 int ret = -EINVAL;
947 int i;
948 u8 pgid;
949 u8 up_map;
950 u8 prio;
951 u8 tc_pct;
952
953 if (!tb[DCB_ATTR_PG_CFG] ||
954 !netdev->dcbnl_ops->setpgtccfgtx ||
955 !netdev->dcbnl_ops->setpgtccfgrx ||
956 !netdev->dcbnl_ops->setpgbwgcfgtx ||
957 !netdev->dcbnl_ops->setpgbwgcfgrx)
958 return ret;
959
960 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
961 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
962 if (ret)
963 goto err;
964
965 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
966 if (!pg_tb[i])
967 continue;
968
969 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
970 pg_tb[i], dcbnl_tc_param_nest);
971 if (ret)
972 goto err;
973
974 pgid = DCB_ATTR_VALUE_UNDEFINED;
975 prio = DCB_ATTR_VALUE_UNDEFINED;
976 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
977 up_map = DCB_ATTR_VALUE_UNDEFINED;
978
979 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
980 prio =
981 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
982
983 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
984 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
985
986 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
987 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
988
989 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
990 up_map =
991 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
992
993 /* dir: Tx = 0, Rx = 1 */
994 if (dir) {
995 /* Rx */
996 netdev->dcbnl_ops->setpgtccfgrx(netdev,
997 i - DCB_PG_ATTR_TC_0,
998 prio, pgid, tc_pct, up_map);
999 } else {
1000 /* Tx */
1001 netdev->dcbnl_ops->setpgtccfgtx(netdev,
1002 i - DCB_PG_ATTR_TC_0,
1003 prio, pgid, tc_pct, up_map);
1004 }
1005 }
1006
1007 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1008 if (!pg_tb[i])
1009 continue;
1010
1011 tc_pct = nla_get_u8(pg_tb[i]);
1012
1013 /* dir: Tx = 0, Rx = 1 */
1014 if (dir) {
1015 /* Rx */
1016 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1017 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1018 } else {
1019 /* Tx */
1020 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1021 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1022 }
1023 }
1024
1025 ret = dcbnl_reply(0, RTM_SETDCB,
1026 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1027 DCB_ATTR_PG_CFG, pid, seq, flags);
1028
1029 err:
1030 return ret;
1031 }
1032
1033 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1034 u32 pid, u32 seq, u16 flags)
1035 {
1036 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1037 }
1038
1039 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1040 u32 pid, u32 seq, u16 flags)
1041 {
1042 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1043 }
1044
1045 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1046 u32 pid, u32 seq, u16 flags)
1047 {
1048 struct sk_buff *dcbnl_skb;
1049 struct nlmsghdr *nlh;
1050 struct dcbmsg *dcb;
1051 struct nlattr *bcn_nest;
1052 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1053 u8 value_byte;
1054 u32 value_integer;
1055 int ret = -EINVAL;
1056 bool getall = false;
1057 int i;
1058
1059 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1060 !netdev->dcbnl_ops->getbcncfg)
1061 return ret;
1062
1063 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1064 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1065
1066 if (ret)
1067 goto err_out;
1068
1069 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1070 if (!dcbnl_skb)
1071 goto err_out;
1072
1073 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1074
1075 dcb = NLMSG_DATA(nlh);
1076 dcb->dcb_family = AF_UNSPEC;
1077 dcb->cmd = DCB_CMD_BCN_GCFG;
1078
1079 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1080 if (!bcn_nest)
1081 goto err;
1082
1083 if (bcn_tb[DCB_BCN_ATTR_ALL])
1084 getall = true;
1085
1086 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1087 if (!getall && !bcn_tb[i])
1088 continue;
1089
1090 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1091 &value_byte);
1092 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1093 if (ret)
1094 goto err_bcn;
1095 }
1096
1097 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1098 if (!getall && !bcn_tb[i])
1099 continue;
1100
1101 netdev->dcbnl_ops->getbcncfg(netdev, i,
1102 &value_integer);
1103 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1104 if (ret)
1105 goto err_bcn;
1106 }
1107
1108 nla_nest_end(dcbnl_skb, bcn_nest);
1109
1110 nlmsg_end(dcbnl_skb, nlh);
1111
1112 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1113 if (ret)
1114 goto err_out;
1115
1116 return 0;
1117
1118 err_bcn:
1119 nla_nest_cancel(dcbnl_skb, bcn_nest);
1120 nlmsg_failure:
1121 err:
1122 kfree_skb(dcbnl_skb);
1123 err_out:
1124 ret = -EINVAL;
1125 return ret;
1126 }
1127
1128 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1129 u32 pid, u32 seq, u16 flags)
1130 {
1131 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1132 int i;
1133 int ret = -EINVAL;
1134 u8 value_byte;
1135 u32 value_int;
1136
1137 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1138 !netdev->dcbnl_ops->setbcnrp)
1139 return ret;
1140
1141 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1142 tb[DCB_ATTR_BCN],
1143 dcbnl_pfc_up_nest);
1144 if (ret)
1145 goto err;
1146
1147 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1148 if (data[i] == NULL)
1149 continue;
1150 value_byte = nla_get_u8(data[i]);
1151 netdev->dcbnl_ops->setbcnrp(netdev,
1152 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1153 }
1154
1155 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1156 if (data[i] == NULL)
1157 continue;
1158 value_int = nla_get_u32(data[i]);
1159 netdev->dcbnl_ops->setbcncfg(netdev,
1160 i, value_int);
1161 }
1162
1163 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1164 pid, seq, flags);
1165 err:
1166 return ret;
1167 }
1168
1169 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
1170 int app_nested_type, int app_info_type,
1171 int app_entry_type)
1172 {
1173 struct dcb_peer_app_info info;
1174 struct dcb_app *table = NULL;
1175 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1176 u16 app_count;
1177 int err;
1178
1179
1180 /**
1181 * retrieve the peer app configuration form the driver. If the driver
1182 * handlers fail exit without doing anything
1183 */
1184 err = ops->peer_getappinfo(netdev, &info, &app_count);
1185 if (!err && app_count) {
1186 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
1187 if (!table)
1188 return -ENOMEM;
1189
1190 err = ops->peer_getapptable(netdev, table);
1191 }
1192
1193 if (!err) {
1194 u16 i;
1195 struct nlattr *app;
1196
1197 /**
1198 * build the message, from here on the only possible failure
1199 * is due to the skb size
1200 */
1201 err = -EMSGSIZE;
1202
1203 app = nla_nest_start(skb, app_nested_type);
1204 if (!app)
1205 goto nla_put_failure;
1206
1207 if (app_info_type)
1208 NLA_PUT(skb, app_info_type, sizeof(info), &info);
1209
1210 for (i = 0; i < app_count; i++)
1211 NLA_PUT(skb, app_entry_type, sizeof(struct dcb_app),
1212 &table[i]);
1213
1214 nla_nest_end(skb, app);
1215 }
1216 err = 0;
1217
1218 nla_put_failure:
1219 kfree(table);
1220 return err;
1221 }
1222
1223 /* Handle IEEE 802.1Qaz GET commands. */
1224 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1225 {
1226 struct nlattr *ieee, *app;
1227 struct dcb_app_type *itr;
1228 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1229 int dcbx;
1230 int err = -EMSGSIZE;
1231
1232 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1233
1234 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1235 if (!ieee)
1236 goto nla_put_failure;
1237
1238 if (ops->ieee_getets) {
1239 struct ieee_ets ets;
1240 err = ops->ieee_getets(netdev, &ets);
1241 if (!err)
1242 NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1243 }
1244
1245 if (ops->ieee_getpfc) {
1246 struct ieee_pfc pfc;
1247 err = ops->ieee_getpfc(netdev, &pfc);
1248 if (!err)
1249 NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1250 }
1251
1252 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1253 if (!app)
1254 goto nla_put_failure;
1255
1256 spin_lock(&dcb_lock);
1257 list_for_each_entry(itr, &dcb_app_list, list) {
1258 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1259 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1260 &itr->app);
1261 if (err) {
1262 spin_unlock(&dcb_lock);
1263 goto nla_put_failure;
1264 }
1265 }
1266 }
1267
1268 if (netdev->dcbnl_ops->getdcbx)
1269 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1270 else
1271 dcbx = -EOPNOTSUPP;
1272
1273 spin_unlock(&dcb_lock);
1274 nla_nest_end(skb, app);
1275
1276 /* get peer info if available */
1277 if (ops->ieee_peer_getets) {
1278 struct ieee_ets ets;
1279 err = ops->ieee_peer_getets(netdev, &ets);
1280 if (!err)
1281 NLA_PUT(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets);
1282 }
1283
1284 if (ops->ieee_peer_getpfc) {
1285 struct ieee_pfc pfc;
1286 err = ops->ieee_peer_getpfc(netdev, &pfc);
1287 if (!err)
1288 NLA_PUT(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc);
1289 }
1290
1291 if (ops->peer_getappinfo && ops->peer_getapptable) {
1292 err = dcbnl_build_peer_app(netdev, skb,
1293 DCB_ATTR_IEEE_PEER_APP,
1294 DCB_ATTR_IEEE_APP_UNSPEC,
1295 DCB_ATTR_IEEE_APP);
1296 if (err)
1297 goto nla_put_failure;
1298 }
1299
1300 nla_nest_end(skb, ieee);
1301 if (dcbx >= 0) {
1302 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1303 if (err)
1304 goto nla_put_failure;
1305 }
1306
1307 return 0;
1308
1309 nla_put_failure:
1310 return err;
1311 }
1312
1313 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1314 int dir)
1315 {
1316 u8 pgid, up_map, prio, tc_pct;
1317 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1318 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1319 struct nlattr *pg = nla_nest_start(skb, i);
1320
1321 if (!pg)
1322 goto nla_put_failure;
1323
1324 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1325 struct nlattr *tc_nest = nla_nest_start(skb, i);
1326
1327 if (!tc_nest)
1328 goto nla_put_failure;
1329
1330 pgid = DCB_ATTR_VALUE_UNDEFINED;
1331 prio = DCB_ATTR_VALUE_UNDEFINED;
1332 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1333 up_map = DCB_ATTR_VALUE_UNDEFINED;
1334
1335 if (!dir)
1336 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1337 &prio, &pgid, &tc_pct, &up_map);
1338 else
1339 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1340 &prio, &pgid, &tc_pct, &up_map);
1341
1342 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_PGID, pgid);
1343 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
1344 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
1345 NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct);
1346 nla_nest_end(skb, tc_nest);
1347 }
1348
1349 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1350 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1351
1352 if (!dir)
1353 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1354 &tc_pct);
1355 else
1356 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1357 &tc_pct);
1358 NLA_PUT_U8(skb, i, tc_pct);
1359 }
1360 nla_nest_end(skb, pg);
1361 return 0;
1362
1363 nla_put_failure:
1364 return -EMSGSIZE;
1365 }
1366
1367 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1368 {
1369 struct nlattr *cee, *app;
1370 struct dcb_app_type *itr;
1371 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1372 int dcbx, i, err = -EMSGSIZE;
1373 u8 value;
1374
1375 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1376
1377 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1378 if (!cee)
1379 goto nla_put_failure;
1380
1381 /* local pg */
1382 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1383 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1384 if (err)
1385 goto nla_put_failure;
1386 }
1387
1388 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1389 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1390 if (err)
1391 goto nla_put_failure;
1392 }
1393
1394 /* local pfc */
1395 if (ops->getpfccfg) {
1396 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1397
1398 if (!pfc_nest)
1399 goto nla_put_failure;
1400
1401 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1402 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1403 NLA_PUT_U8(skb, i, value);
1404 }
1405 nla_nest_end(skb, pfc_nest);
1406 }
1407
1408 /* local app */
1409 spin_lock(&dcb_lock);
1410 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1411 if (!app)
1412 goto dcb_unlock;
1413
1414 list_for_each_entry(itr, &dcb_app_list, list) {
1415 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1416 struct nlattr *app_nest = nla_nest_start(skb,
1417 DCB_ATTR_APP);
1418 if (!app_nest)
1419 goto dcb_unlock;
1420
1421 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1422 itr->app.selector);
1423 if (err)
1424 goto dcb_unlock;
1425
1426 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1427 itr->app.protocol);
1428 if (err)
1429 goto dcb_unlock;
1430
1431 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1432 itr->app.priority);
1433 if (err)
1434 goto dcb_unlock;
1435
1436 nla_nest_end(skb, app_nest);
1437 }
1438 }
1439 nla_nest_end(skb, app);
1440
1441 if (netdev->dcbnl_ops->getdcbx)
1442 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1443 else
1444 dcbx = -EOPNOTSUPP;
1445
1446 spin_unlock(&dcb_lock);
1447
1448 /* features flags */
1449 if (ops->getfeatcfg) {
1450 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1451 if (!feat)
1452 goto nla_put_failure;
1453
1454 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1455 i++)
1456 if (!ops->getfeatcfg(netdev, i, &value))
1457 NLA_PUT_U8(skb, i, value);
1458
1459 nla_nest_end(skb, feat);
1460 }
1461
1462 /* peer info if available */
1463 if (ops->cee_peer_getpg) {
1464 struct cee_pg pg;
1465 err = ops->cee_peer_getpg(netdev, &pg);
1466 if (!err)
1467 NLA_PUT(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg);
1468 }
1469
1470 if (ops->cee_peer_getpfc) {
1471 struct cee_pfc pfc;
1472 err = ops->cee_peer_getpfc(netdev, &pfc);
1473 if (!err)
1474 NLA_PUT(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc);
1475 }
1476
1477 if (ops->peer_getappinfo && ops->peer_getapptable) {
1478 err = dcbnl_build_peer_app(netdev, skb,
1479 DCB_ATTR_CEE_PEER_APP_TABLE,
1480 DCB_ATTR_CEE_PEER_APP_INFO,
1481 DCB_ATTR_CEE_PEER_APP);
1482 if (err)
1483 goto nla_put_failure;
1484 }
1485 nla_nest_end(skb, cee);
1486
1487 /* DCBX state */
1488 if (dcbx >= 0) {
1489 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1490 if (err)
1491 goto nla_put_failure;
1492 }
1493 return 0;
1494
1495 dcb_unlock:
1496 spin_unlock(&dcb_lock);
1497 nla_put_failure:
1498 return err;
1499 }
1500
1501 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1502 u32 seq, u32 pid, int dcbx_ver)
1503 {
1504 struct net *net = dev_net(dev);
1505 struct sk_buff *skb;
1506 struct nlmsghdr *nlh;
1507 struct dcbmsg *dcb;
1508 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1509 int err;
1510
1511 if (!ops)
1512 return -EOPNOTSUPP;
1513
1514 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1515 if (!skb)
1516 return -ENOBUFS;
1517
1518 nlh = nlmsg_put(skb, pid, 0, event, sizeof(*dcb), 0);
1519 if (nlh == NULL) {
1520 nlmsg_free(skb);
1521 return -EMSGSIZE;
1522 }
1523
1524 dcb = NLMSG_DATA(nlh);
1525 dcb->dcb_family = AF_UNSPEC;
1526 dcb->cmd = cmd;
1527
1528 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1529 err = dcbnl_ieee_fill(skb, dev);
1530 else
1531 err = dcbnl_cee_fill(skb, dev);
1532
1533 if (err < 0) {
1534 /* Report error to broadcast listeners */
1535 nlmsg_cancel(skb, nlh);
1536 kfree_skb(skb);
1537 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1538 } else {
1539 /* End nlmsg and notify broadcast listeners */
1540 nlmsg_end(skb, nlh);
1541 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1542 }
1543
1544 return err;
1545 }
1546
1547 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1548 u32 seq, u32 pid)
1549 {
1550 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_IEEE);
1551 }
1552 EXPORT_SYMBOL(dcbnl_ieee_notify);
1553
1554 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1555 u32 seq, u32 pid)
1556 {
1557 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_CEE);
1558 }
1559 EXPORT_SYMBOL(dcbnl_cee_notify);
1560
1561 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1562 * be completed the entire msg is aborted and error value is returned.
1563 * No attempt is made to reconcile the case where only part of the
1564 * cmd can be completed.
1565 */
1566 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1567 u32 pid, u32 seq, u16 flags)
1568 {
1569 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1570 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1571 int err = -EOPNOTSUPP;
1572
1573 if (!ops)
1574 return err;
1575
1576 if (!tb[DCB_ATTR_IEEE])
1577 return -EINVAL;
1578
1579 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1580 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1581 if (err)
1582 return err;
1583
1584 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1585 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1586 err = ops->ieee_setets(netdev, ets);
1587 if (err)
1588 goto err;
1589 }
1590
1591 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1592 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1593 err = ops->ieee_setpfc(netdev, pfc);
1594 if (err)
1595 goto err;
1596 }
1597
1598 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1599 struct nlattr *attr;
1600 int rem;
1601
1602 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1603 struct dcb_app *app_data;
1604 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1605 continue;
1606 app_data = nla_data(attr);
1607 if (ops->ieee_setapp)
1608 err = ops->ieee_setapp(netdev, app_data);
1609 else
1610 err = dcb_ieee_setapp(netdev, app_data);
1611 if (err)
1612 goto err;
1613 }
1614 }
1615
1616 err:
1617 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1618 pid, seq, flags);
1619 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1620 return err;
1621 }
1622
1623 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1624 u32 pid, u32 seq, u16 flags)
1625 {
1626 struct net *net = dev_net(netdev);
1627 struct sk_buff *skb;
1628 struct nlmsghdr *nlh;
1629 struct dcbmsg *dcb;
1630 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1631 int err;
1632
1633 if (!ops)
1634 return -EOPNOTSUPP;
1635
1636 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1637 if (!skb)
1638 return -ENOBUFS;
1639
1640 nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1641 if (nlh == NULL) {
1642 nlmsg_free(skb);
1643 return -EMSGSIZE;
1644 }
1645
1646 dcb = NLMSG_DATA(nlh);
1647 dcb->dcb_family = AF_UNSPEC;
1648 dcb->cmd = DCB_CMD_IEEE_GET;
1649
1650 err = dcbnl_ieee_fill(skb, netdev);
1651
1652 if (err < 0) {
1653 nlmsg_cancel(skb, nlh);
1654 kfree_skb(skb);
1655 } else {
1656 nlmsg_end(skb, nlh);
1657 err = rtnl_unicast(skb, net, pid);
1658 }
1659
1660 return err;
1661 }
1662
1663 static int dcbnl_ieee_del(struct net_device *netdev, struct nlattr **tb,
1664 u32 pid, u32 seq, u16 flags)
1665 {
1666 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1667 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1668 int err = -EOPNOTSUPP;
1669
1670 if (!ops)
1671 return -EOPNOTSUPP;
1672
1673 if (!tb[DCB_ATTR_IEEE])
1674 return -EINVAL;
1675
1676 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1677 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1678 if (err)
1679 return err;
1680
1681 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1682 struct nlattr *attr;
1683 int rem;
1684
1685 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1686 struct dcb_app *app_data;
1687
1688 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1689 continue;
1690 app_data = nla_data(attr);
1691 if (ops->ieee_delapp)
1692 err = ops->ieee_delapp(netdev, app_data);
1693 else
1694 err = dcb_ieee_delapp(netdev, app_data);
1695 if (err)
1696 goto err;
1697 }
1698 }
1699
1700 err:
1701 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_DEL, DCB_ATTR_IEEE,
1702 pid, seq, flags);
1703 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1704 return err;
1705 }
1706
1707
1708 /* DCBX configuration */
1709 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1710 u32 pid, u32 seq, u16 flags)
1711 {
1712 int ret;
1713
1714 if (!netdev->dcbnl_ops->getdcbx)
1715 return -EOPNOTSUPP;
1716
1717 ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1718 DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1719
1720 return ret;
1721 }
1722
1723 static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1724 u32 pid, u32 seq, u16 flags)
1725 {
1726 int ret;
1727 u8 value;
1728
1729 if (!netdev->dcbnl_ops->setdcbx)
1730 return -EOPNOTSUPP;
1731
1732 if (!tb[DCB_ATTR_DCBX])
1733 return -EINVAL;
1734
1735 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1736
1737 ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1738 RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1739 pid, seq, flags);
1740
1741 return ret;
1742 }
1743
1744 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1745 u32 pid, u32 seq, u16 flags)
1746 {
1747 struct sk_buff *dcbnl_skb;
1748 struct nlmsghdr *nlh;
1749 struct dcbmsg *dcb;
1750 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1751 u8 value;
1752 int ret, i;
1753 int getall = 0;
1754
1755 if (!netdev->dcbnl_ops->getfeatcfg)
1756 return -EOPNOTSUPP;
1757
1758 if (!tb[DCB_ATTR_FEATCFG])
1759 return -EINVAL;
1760
1761 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1762 dcbnl_featcfg_nest);
1763 if (ret)
1764 goto err_out;
1765
1766 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1767 if (!dcbnl_skb) {
1768 ret = -ENOBUFS;
1769 goto err_out;
1770 }
1771
1772 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1773
1774 dcb = NLMSG_DATA(nlh);
1775 dcb->dcb_family = AF_UNSPEC;
1776 dcb->cmd = DCB_CMD_GFEATCFG;
1777
1778 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1779 if (!nest) {
1780 ret = -EMSGSIZE;
1781 goto nla_put_failure;
1782 }
1783
1784 if (data[DCB_FEATCFG_ATTR_ALL])
1785 getall = 1;
1786
1787 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1788 if (!getall && !data[i])
1789 continue;
1790
1791 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1792 if (!ret)
1793 ret = nla_put_u8(dcbnl_skb, i, value);
1794
1795 if (ret) {
1796 nla_nest_cancel(dcbnl_skb, nest);
1797 goto nla_put_failure;
1798 }
1799 }
1800 nla_nest_end(dcbnl_skb, nest);
1801
1802 nlmsg_end(dcbnl_skb, nlh);
1803
1804 return rtnl_unicast(dcbnl_skb, &init_net, pid);
1805 nla_put_failure:
1806 nlmsg_cancel(dcbnl_skb, nlh);
1807 nlmsg_failure:
1808 kfree_skb(dcbnl_skb);
1809 err_out:
1810 return ret;
1811 }
1812
1813 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1814 u32 pid, u32 seq, u16 flags)
1815 {
1816 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1817 int ret, i;
1818 u8 value;
1819
1820 if (!netdev->dcbnl_ops->setfeatcfg)
1821 return -ENOTSUPP;
1822
1823 if (!tb[DCB_ATTR_FEATCFG])
1824 return -EINVAL;
1825
1826 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1827 dcbnl_featcfg_nest);
1828
1829 if (ret)
1830 goto err;
1831
1832 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1833 if (data[i] == NULL)
1834 continue;
1835
1836 value = nla_get_u8(data[i]);
1837
1838 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1839
1840 if (ret)
1841 goto err;
1842 }
1843 err:
1844 dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1845 pid, seq, flags);
1846
1847 return ret;
1848 }
1849
1850 /* Handle CEE DCBX GET commands. */
1851 static int dcbnl_cee_get(struct net_device *netdev, struct nlattr **tb,
1852 u32 pid, u32 seq, u16 flags)
1853 {
1854 struct net *net = dev_net(netdev);
1855 struct sk_buff *skb;
1856 struct nlmsghdr *nlh;
1857 struct dcbmsg *dcb;
1858 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1859 int err;
1860
1861 if (!ops)
1862 return -EOPNOTSUPP;
1863
1864 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1865 if (!skb)
1866 return -ENOBUFS;
1867
1868 nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1869 if (nlh == NULL) {
1870 nlmsg_free(skb);
1871 return -EMSGSIZE;
1872 }
1873
1874 dcb = NLMSG_DATA(nlh);
1875 dcb->dcb_family = AF_UNSPEC;
1876 dcb->cmd = DCB_CMD_CEE_GET;
1877
1878 err = dcbnl_cee_fill(skb, netdev);
1879
1880 if (err < 0) {
1881 nlmsg_cancel(skb, nlh);
1882 nlmsg_free(skb);
1883 } else {
1884 nlmsg_end(skb, nlh);
1885 err = rtnl_unicast(skb, net, pid);
1886 }
1887 return err;
1888 }
1889
1890 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1891 {
1892 struct net *net = sock_net(skb->sk);
1893 struct net_device *netdev;
1894 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1895 struct nlattr *tb[DCB_ATTR_MAX + 1];
1896 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1897 int ret = -EINVAL;
1898
1899 if (!net_eq(net, &init_net))
1900 return -EINVAL;
1901
1902 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1903 dcbnl_rtnl_policy);
1904 if (ret < 0)
1905 return ret;
1906
1907 if (!tb[DCB_ATTR_IFNAME])
1908 return -EINVAL;
1909
1910 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1911 if (!netdev)
1912 return -EINVAL;
1913
1914 if (!netdev->dcbnl_ops)
1915 goto errout;
1916
1917 switch (dcb->cmd) {
1918 case DCB_CMD_GSTATE:
1919 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1920 nlh->nlmsg_flags);
1921 goto out;
1922 case DCB_CMD_PFC_GCFG:
1923 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1924 nlh->nlmsg_flags);
1925 goto out;
1926 case DCB_CMD_GPERM_HWADDR:
1927 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1928 nlh->nlmsg_flags);
1929 goto out;
1930 case DCB_CMD_PGTX_GCFG:
1931 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1932 nlh->nlmsg_flags);
1933 goto out;
1934 case DCB_CMD_PGRX_GCFG:
1935 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1936 nlh->nlmsg_flags);
1937 goto out;
1938 case DCB_CMD_BCN_GCFG:
1939 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1940 nlh->nlmsg_flags);
1941 goto out;
1942 case DCB_CMD_SSTATE:
1943 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1944 nlh->nlmsg_flags);
1945 goto out;
1946 case DCB_CMD_PFC_SCFG:
1947 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1948 nlh->nlmsg_flags);
1949 goto out;
1950
1951 case DCB_CMD_SET_ALL:
1952 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1953 nlh->nlmsg_flags);
1954 goto out;
1955 case DCB_CMD_PGTX_SCFG:
1956 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1957 nlh->nlmsg_flags);
1958 goto out;
1959 case DCB_CMD_PGRX_SCFG:
1960 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1961 nlh->nlmsg_flags);
1962 goto out;
1963 case DCB_CMD_GCAP:
1964 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1965 nlh->nlmsg_flags);
1966 goto out;
1967 case DCB_CMD_GNUMTCS:
1968 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1969 nlh->nlmsg_flags);
1970 goto out;
1971 case DCB_CMD_SNUMTCS:
1972 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1973 nlh->nlmsg_flags);
1974 goto out;
1975 case DCB_CMD_PFC_GSTATE:
1976 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1977 nlh->nlmsg_flags);
1978 goto out;
1979 case DCB_CMD_PFC_SSTATE:
1980 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1981 nlh->nlmsg_flags);
1982 goto out;
1983 case DCB_CMD_BCN_SCFG:
1984 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1985 nlh->nlmsg_flags);
1986 goto out;
1987 case DCB_CMD_GAPP:
1988 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1989 nlh->nlmsg_flags);
1990 goto out;
1991 case DCB_CMD_SAPP:
1992 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1993 nlh->nlmsg_flags);
1994 goto out;
1995 case DCB_CMD_IEEE_SET:
1996 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1997 nlh->nlmsg_flags);
1998 goto out;
1999 case DCB_CMD_IEEE_GET:
2000 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
2001 nlh->nlmsg_flags);
2002 goto out;
2003 case DCB_CMD_IEEE_DEL:
2004 ret = dcbnl_ieee_del(netdev, tb, pid, nlh->nlmsg_seq,
2005 nlh->nlmsg_flags);
2006 goto out;
2007 case DCB_CMD_GDCBX:
2008 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
2009 nlh->nlmsg_flags);
2010 goto out;
2011 case DCB_CMD_SDCBX:
2012 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
2013 nlh->nlmsg_flags);
2014 goto out;
2015 case DCB_CMD_GFEATCFG:
2016 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
2017 nlh->nlmsg_flags);
2018 goto out;
2019 case DCB_CMD_SFEATCFG:
2020 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
2021 nlh->nlmsg_flags);
2022 goto out;
2023 case DCB_CMD_CEE_GET:
2024 ret = dcbnl_cee_get(netdev, tb, pid, nlh->nlmsg_seq,
2025 nlh->nlmsg_flags);
2026 goto out;
2027 default:
2028 goto errout;
2029 }
2030 errout:
2031 ret = -EINVAL;
2032 out:
2033 dev_put(netdev);
2034 return ret;
2035 }
2036
2037 /**
2038 * dcb_getapp - retrieve the DCBX application user priority
2039 *
2040 * On success returns a non-zero 802.1p user priority bitmap
2041 * otherwise returns 0 as the invalid user priority bitmap to
2042 * indicate an error.
2043 */
2044 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
2045 {
2046 struct dcb_app_type *itr;
2047 u8 prio = 0;
2048
2049 spin_lock(&dcb_lock);
2050 list_for_each_entry(itr, &dcb_app_list, list) {
2051 if (itr->app.selector == app->selector &&
2052 itr->app.protocol == app->protocol &&
2053 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2054 prio = itr->app.priority;
2055 break;
2056 }
2057 }
2058 spin_unlock(&dcb_lock);
2059
2060 return prio;
2061 }
2062 EXPORT_SYMBOL(dcb_getapp);
2063
2064 /**
2065 * dcb_setapp - add CEE dcb application data to app list
2066 *
2067 * Priority 0 is an invalid priority in CEE spec. This routine
2068 * removes applications from the app list if the priority is
2069 * set to zero.
2070 */
2071 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
2072 {
2073 struct dcb_app_type *itr;
2074 struct dcb_app_type event;
2075
2076 memcpy(&event.name, dev->name, sizeof(event.name));
2077 memcpy(&event.app, new, sizeof(event.app));
2078
2079 spin_lock(&dcb_lock);
2080 /* Search for existing match and replace */
2081 list_for_each_entry(itr, &dcb_app_list, list) {
2082 if (itr->app.selector == new->selector &&
2083 itr->app.protocol == new->protocol &&
2084 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2085 if (new->priority)
2086 itr->app.priority = new->priority;
2087 else {
2088 list_del(&itr->list);
2089 kfree(itr);
2090 }
2091 goto out;
2092 }
2093 }
2094 /* App type does not exist add new application type */
2095 if (new->priority) {
2096 struct dcb_app_type *entry;
2097 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
2098 if (!entry) {
2099 spin_unlock(&dcb_lock);
2100 return -ENOMEM;
2101 }
2102
2103 memcpy(&entry->app, new, sizeof(*new));
2104 strncpy(entry->name, dev->name, IFNAMSIZ);
2105 list_add(&entry->list, &dcb_app_list);
2106 }
2107 out:
2108 spin_unlock(&dcb_lock);
2109 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2110 return 0;
2111 }
2112 EXPORT_SYMBOL(dcb_setapp);
2113
2114 /**
2115 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
2116 *
2117 * Helper routine which on success returns a non-zero 802.1Qaz user
2118 * priority bitmap otherwise returns 0 to indicate the dcb_app was
2119 * not found in APP list.
2120 */
2121 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
2122 {
2123 struct dcb_app_type *itr;
2124 u8 prio = 0;
2125
2126 spin_lock(&dcb_lock);
2127 list_for_each_entry(itr, &dcb_app_list, list) {
2128 if (itr->app.selector == app->selector &&
2129 itr->app.protocol == app->protocol &&
2130 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2131 prio |= 1 << itr->app.priority;
2132 }
2133 }
2134 spin_unlock(&dcb_lock);
2135
2136 return prio;
2137 }
2138 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
2139
2140 /**
2141 * dcb_ieee_setapp - add IEEE dcb application data to app list
2142 *
2143 * This adds Application data to the list. Multiple application
2144 * entries may exists for the same selector and protocol as long
2145 * as the priorities are different.
2146 */
2147 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
2148 {
2149 struct dcb_app_type *itr, *entry;
2150 struct dcb_app_type event;
2151 int err = 0;
2152
2153 memcpy(&event.name, dev->name, sizeof(event.name));
2154 memcpy(&event.app, new, sizeof(event.app));
2155
2156 spin_lock(&dcb_lock);
2157 /* Search for existing match and abort if found */
2158 list_for_each_entry(itr, &dcb_app_list, list) {
2159 if (itr->app.selector == new->selector &&
2160 itr->app.protocol == new->protocol &&
2161 itr->app.priority == new->priority &&
2162 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2163 err = -EEXIST;
2164 goto out;
2165 }
2166 }
2167
2168 /* App entry does not exist add new entry */
2169 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
2170 if (!entry) {
2171 err = -ENOMEM;
2172 goto out;
2173 }
2174
2175 memcpy(&entry->app, new, sizeof(*new));
2176 strncpy(entry->name, dev->name, IFNAMSIZ);
2177 list_add(&entry->list, &dcb_app_list);
2178 out:
2179 spin_unlock(&dcb_lock);
2180 if (!err)
2181 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2182 return err;
2183 }
2184 EXPORT_SYMBOL(dcb_ieee_setapp);
2185
2186 /**
2187 * dcb_ieee_delapp - delete IEEE dcb application data from list
2188 *
2189 * This removes a matching APP data from the APP list
2190 */
2191 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
2192 {
2193 struct dcb_app_type *itr;
2194 struct dcb_app_type event;
2195 int err = -ENOENT;
2196
2197 memcpy(&event.name, dev->name, sizeof(event.name));
2198 memcpy(&event.app, del, sizeof(event.app));
2199
2200 spin_lock(&dcb_lock);
2201 /* Search for existing match and remove it. */
2202 list_for_each_entry(itr, &dcb_app_list, list) {
2203 if (itr->app.selector == del->selector &&
2204 itr->app.protocol == del->protocol &&
2205 itr->app.priority == del->priority &&
2206 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
2207 list_del(&itr->list);
2208 kfree(itr);
2209 err = 0;
2210 goto out;
2211 }
2212 }
2213
2214 out:
2215 spin_unlock(&dcb_lock);
2216 if (!err)
2217 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
2218 return err;
2219 }
2220 EXPORT_SYMBOL(dcb_ieee_delapp);
2221
2222 static void dcb_flushapp(void)
2223 {
2224 struct dcb_app_type *app;
2225 struct dcb_app_type *tmp;
2226
2227 spin_lock(&dcb_lock);
2228 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
2229 list_del(&app->list);
2230 kfree(app);
2231 }
2232 spin_unlock(&dcb_lock);
2233 }
2234
2235 static int __init dcbnl_init(void)
2236 {
2237 INIT_LIST_HEAD(&dcb_app_list);
2238
2239 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
2240 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
2241
2242 return 0;
2243 }
2244 module_init(dcbnl_init);
2245
2246 static void __exit dcbnl_exit(void)
2247 {
2248 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
2249 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
2250 dcb_flushapp();
2251 }
2252 module_exit(dcbnl_exit);
Linux kernel 2.6 stable trees (mirror)