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