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