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Merge tag 'leds_for_4.10_email_update' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-artful-kernel.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 * 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 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
182 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
183 };
184
185 /* DCB number of traffic classes nested attributes. */
186 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
187 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
188 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
189 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
190 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
191 };
192
193 static LIST_HEAD(dcb_app_list);
194 static DEFINE_SPINLOCK(dcb_lock);
195
196 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
197 u32 flags, struct nlmsghdr **nlhp)
198 {
199 struct sk_buff *skb;
200 struct dcbmsg *dcb;
201 struct nlmsghdr *nlh;
202
203 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
204 if (!skb)
205 return NULL;
206
207 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
208 BUG_ON(!nlh);
209
210 dcb = nlmsg_data(nlh);
211 dcb->dcb_family = AF_UNSPEC;
212 dcb->cmd = cmd;
213 dcb->dcb_pad = 0;
214
215 if (nlhp)
216 *nlhp = nlh;
217
218 return skb;
219 }
220
221 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
222 u32 seq, struct nlattr **tb, struct sk_buff *skb)
223 {
224 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
225 if (!netdev->dcbnl_ops->getstate)
226 return -EOPNOTSUPP;
227
228 return nla_put_u8(skb, DCB_ATTR_STATE,
229 netdev->dcbnl_ops->getstate(netdev));
230 }
231
232 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
233 u32 seq, struct nlattr **tb, struct sk_buff *skb)
234 {
235 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
236 u8 value;
237 int ret;
238 int i;
239 int getall = 0;
240
241 if (!tb[DCB_ATTR_PFC_CFG])
242 return -EINVAL;
243
244 if (!netdev->dcbnl_ops->getpfccfg)
245 return -EOPNOTSUPP;
246
247 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
248 tb[DCB_ATTR_PFC_CFG],
249 dcbnl_pfc_up_nest);
250 if (ret)
251 return ret;
252
253 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
254 if (!nest)
255 return -EMSGSIZE;
256
257 if (data[DCB_PFC_UP_ATTR_ALL])
258 getall = 1;
259
260 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
261 if (!getall && !data[i])
262 continue;
263
264 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
265 &value);
266 ret = nla_put_u8(skb, i, value);
267 if (ret) {
268 nla_nest_cancel(skb, nest);
269 return ret;
270 }
271 }
272 nla_nest_end(skb, nest);
273
274 return 0;
275 }
276
277 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
278 u32 seq, struct nlattr **tb, struct sk_buff *skb)
279 {
280 u8 perm_addr[MAX_ADDR_LEN];
281
282 if (!netdev->dcbnl_ops->getpermhwaddr)
283 return -EOPNOTSUPP;
284
285 memset(perm_addr, 0, sizeof(perm_addr));
286 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
287
288 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
289 }
290
291 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
292 u32 seq, struct nlattr **tb, struct sk_buff *skb)
293 {
294 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
295 u8 value;
296 int ret;
297 int i;
298 int getall = 0;
299
300 if (!tb[DCB_ATTR_CAP])
301 return -EINVAL;
302
303 if (!netdev->dcbnl_ops->getcap)
304 return -EOPNOTSUPP;
305
306 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
307 dcbnl_cap_nest);
308 if (ret)
309 return ret;
310
311 nest = nla_nest_start(skb, DCB_ATTR_CAP);
312 if (!nest)
313 return -EMSGSIZE;
314
315 if (data[DCB_CAP_ATTR_ALL])
316 getall = 1;
317
318 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
319 if (!getall && !data[i])
320 continue;
321
322 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
323 ret = nla_put_u8(skb, i, value);
324 if (ret) {
325 nla_nest_cancel(skb, nest);
326 return ret;
327 }
328 }
329 }
330 nla_nest_end(skb, nest);
331
332 return 0;
333 }
334
335 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
336 u32 seq, struct nlattr **tb, struct sk_buff *skb)
337 {
338 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
339 u8 value;
340 int ret;
341 int i;
342 int getall = 0;
343
344 if (!tb[DCB_ATTR_NUMTCS])
345 return -EINVAL;
346
347 if (!netdev->dcbnl_ops->getnumtcs)
348 return -EOPNOTSUPP;
349
350 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
351 dcbnl_numtcs_nest);
352 if (ret)
353 return ret;
354
355 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
356 if (!nest)
357 return -EMSGSIZE;
358
359 if (data[DCB_NUMTCS_ATTR_ALL])
360 getall = 1;
361
362 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
363 if (!getall && !data[i])
364 continue;
365
366 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
367 if (!ret) {
368 ret = nla_put_u8(skb, i, value);
369 if (ret) {
370 nla_nest_cancel(skb, nest);
371 return ret;
372 }
373 } else
374 return -EINVAL;
375 }
376 nla_nest_end(skb, nest);
377
378 return 0;
379 }
380
381 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
382 u32 seq, struct nlattr **tb, struct sk_buff *skb)
383 {
384 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
385 int ret;
386 u8 value;
387 int i;
388
389 if (!tb[DCB_ATTR_NUMTCS])
390 return -EINVAL;
391
392 if (!netdev->dcbnl_ops->setnumtcs)
393 return -EOPNOTSUPP;
394
395 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
396 dcbnl_numtcs_nest);
397 if (ret)
398 return ret;
399
400 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
401 if (data[i] == NULL)
402 continue;
403
404 value = nla_get_u8(data[i]);
405
406 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
407 if (ret)
408 break;
409 }
410
411 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
412 }
413
414 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
415 u32 seq, struct nlattr **tb, struct sk_buff *skb)
416 {
417 if (!netdev->dcbnl_ops->getpfcstate)
418 return -EOPNOTSUPP;
419
420 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
421 netdev->dcbnl_ops->getpfcstate(netdev));
422 }
423
424 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
425 u32 seq, struct nlattr **tb, struct sk_buff *skb)
426 {
427 u8 value;
428
429 if (!tb[DCB_ATTR_PFC_STATE])
430 return -EINVAL;
431
432 if (!netdev->dcbnl_ops->setpfcstate)
433 return -EOPNOTSUPP;
434
435 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
436
437 netdev->dcbnl_ops->setpfcstate(netdev, value);
438
439 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
440 }
441
442 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
443 u32 seq, struct nlattr **tb, struct sk_buff *skb)
444 {
445 struct nlattr *app_nest;
446 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
447 u16 id;
448 u8 up, idtype;
449 int ret;
450
451 if (!tb[DCB_ATTR_APP])
452 return -EINVAL;
453
454 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
455 dcbnl_app_nest);
456 if (ret)
457 return ret;
458
459 /* all must be non-null */
460 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
461 (!app_tb[DCB_APP_ATTR_ID]))
462 return -EINVAL;
463
464 /* either by eth type or by socket number */
465 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
466 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
467 (idtype != DCB_APP_IDTYPE_PORTNUM))
468 return -EINVAL;
469
470 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
471
472 if (netdev->dcbnl_ops->getapp) {
473 ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
474 if (ret < 0)
475 return ret;
476 else
477 up = ret;
478 } else {
479 struct dcb_app app = {
480 .selector = idtype,
481 .protocol = id,
482 };
483 up = dcb_getapp(netdev, &app);
484 }
485
486 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
487 if (!app_nest)
488 return -EMSGSIZE;
489
490 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
491 if (ret)
492 goto out_cancel;
493
494 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
495 if (ret)
496 goto out_cancel;
497
498 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
499 if (ret)
500 goto out_cancel;
501
502 nla_nest_end(skb, app_nest);
503
504 return 0;
505
506 out_cancel:
507 nla_nest_cancel(skb, app_nest);
508 return ret;
509 }
510
511 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
512 u32 seq, struct nlattr **tb, struct sk_buff *skb)
513 {
514 int ret;
515 u16 id;
516 u8 up, idtype;
517 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
518
519 if (!tb[DCB_ATTR_APP])
520 return -EINVAL;
521
522 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
523 dcbnl_app_nest);
524 if (ret)
525 return ret;
526
527 /* all must be non-null */
528 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
529 (!app_tb[DCB_APP_ATTR_ID]) ||
530 (!app_tb[DCB_APP_ATTR_PRIORITY]))
531 return -EINVAL;
532
533 /* either by eth type or by socket number */
534 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
535 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
536 (idtype != DCB_APP_IDTYPE_PORTNUM))
537 return -EINVAL;
538
539 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
540 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
541
542 if (netdev->dcbnl_ops->setapp) {
543 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
544 if (ret < 0)
545 return ret;
546 } else {
547 struct dcb_app app;
548 app.selector = idtype;
549 app.protocol = id;
550 app.priority = up;
551 ret = dcb_setapp(netdev, &app);
552 }
553
554 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
555 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
556
557 return ret;
558 }
559
560 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
561 struct nlattr **tb, struct sk_buff *skb, int dir)
562 {
563 struct nlattr *pg_nest, *param_nest, *data;
564 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
565 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
566 u8 prio, pgid, tc_pct, up_map;
567 int ret;
568 int getall = 0;
569 int i;
570
571 if (!tb[DCB_ATTR_PG_CFG])
572 return -EINVAL;
573
574 if (!netdev->dcbnl_ops->getpgtccfgtx ||
575 !netdev->dcbnl_ops->getpgtccfgrx ||
576 !netdev->dcbnl_ops->getpgbwgcfgtx ||
577 !netdev->dcbnl_ops->getpgbwgcfgrx)
578 return -EOPNOTSUPP;
579
580 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
581 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
582 if (ret)
583 return ret;
584
585 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
586 if (!pg_nest)
587 return -EMSGSIZE;
588
589 if (pg_tb[DCB_PG_ATTR_TC_ALL])
590 getall = 1;
591
592 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
593 if (!getall && !pg_tb[i])
594 continue;
595
596 if (pg_tb[DCB_PG_ATTR_TC_ALL])
597 data = pg_tb[DCB_PG_ATTR_TC_ALL];
598 else
599 data = pg_tb[i];
600 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
601 data, dcbnl_tc_param_nest);
602 if (ret)
603 goto err_pg;
604
605 param_nest = nla_nest_start(skb, i);
606 if (!param_nest)
607 goto err_pg;
608
609 pgid = DCB_ATTR_VALUE_UNDEFINED;
610 prio = DCB_ATTR_VALUE_UNDEFINED;
611 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
612 up_map = DCB_ATTR_VALUE_UNDEFINED;
613
614 if (dir) {
615 /* Rx */
616 netdev->dcbnl_ops->getpgtccfgrx(netdev,
617 i - DCB_PG_ATTR_TC_0, &prio,
618 &pgid, &tc_pct, &up_map);
619 } else {
620 /* Tx */
621 netdev->dcbnl_ops->getpgtccfgtx(netdev,
622 i - DCB_PG_ATTR_TC_0, &prio,
623 &pgid, &tc_pct, &up_map);
624 }
625
626 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
627 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
628 ret = nla_put_u8(skb,
629 DCB_TC_ATTR_PARAM_PGID, pgid);
630 if (ret)
631 goto err_param;
632 }
633 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
634 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
635 ret = nla_put_u8(skb,
636 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
637 if (ret)
638 goto err_param;
639 }
640 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
641 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
642 ret = nla_put_u8(skb,
643 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
644 if (ret)
645 goto err_param;
646 }
647 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
648 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
649 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
650 tc_pct);
651 if (ret)
652 goto err_param;
653 }
654 nla_nest_end(skb, param_nest);
655 }
656
657 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
658 getall = 1;
659 else
660 getall = 0;
661
662 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
663 if (!getall && !pg_tb[i])
664 continue;
665
666 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
667
668 if (dir) {
669 /* Rx */
670 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
671 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
672 } else {
673 /* Tx */
674 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
675 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
676 }
677 ret = nla_put_u8(skb, i, tc_pct);
678 if (ret)
679 goto err_pg;
680 }
681
682 nla_nest_end(skb, pg_nest);
683
684 return 0;
685
686 err_param:
687 nla_nest_cancel(skb, param_nest);
688 err_pg:
689 nla_nest_cancel(skb, pg_nest);
690
691 return -EMSGSIZE;
692 }
693
694 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
695 u32 seq, struct nlattr **tb, struct sk_buff *skb)
696 {
697 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
698 }
699
700 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
701 u32 seq, struct nlattr **tb, struct sk_buff *skb)
702 {
703 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
704 }
705
706 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
707 u32 seq, struct nlattr **tb, struct sk_buff *skb)
708 {
709 u8 value;
710
711 if (!tb[DCB_ATTR_STATE])
712 return -EINVAL;
713
714 if (!netdev->dcbnl_ops->setstate)
715 return -EOPNOTSUPP;
716
717 value = nla_get_u8(tb[DCB_ATTR_STATE]);
718
719 return nla_put_u8(skb, DCB_ATTR_STATE,
720 netdev->dcbnl_ops->setstate(netdev, value));
721 }
722
723 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
724 u32 seq, struct nlattr **tb, struct sk_buff *skb)
725 {
726 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
727 int i;
728 int ret;
729 u8 value;
730
731 if (!tb[DCB_ATTR_PFC_CFG])
732 return -EINVAL;
733
734 if (!netdev->dcbnl_ops->setpfccfg)
735 return -EOPNOTSUPP;
736
737 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
738 tb[DCB_ATTR_PFC_CFG],
739 dcbnl_pfc_up_nest);
740 if (ret)
741 return ret;
742
743 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
744 if (data[i] == NULL)
745 continue;
746 value = nla_get_u8(data[i]);
747 netdev->dcbnl_ops->setpfccfg(netdev,
748 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
749 }
750
751 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
752 }
753
754 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
755 u32 seq, struct nlattr **tb, struct sk_buff *skb)
756 {
757 int ret;
758
759 if (!tb[DCB_ATTR_SET_ALL])
760 return -EINVAL;
761
762 if (!netdev->dcbnl_ops->setall)
763 return -EOPNOTSUPP;
764
765 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
766 netdev->dcbnl_ops->setall(netdev));
767 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
768
769 return ret;
770 }
771
772 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
773 u32 seq, struct nlattr **tb, struct sk_buff *skb,
774 int dir)
775 {
776 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
777 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
778 int ret;
779 int i;
780 u8 pgid;
781 u8 up_map;
782 u8 prio;
783 u8 tc_pct;
784
785 if (!tb[DCB_ATTR_PG_CFG])
786 return -EINVAL;
787
788 if (!netdev->dcbnl_ops->setpgtccfgtx ||
789 !netdev->dcbnl_ops->setpgtccfgrx ||
790 !netdev->dcbnl_ops->setpgbwgcfgtx ||
791 !netdev->dcbnl_ops->setpgbwgcfgrx)
792 return -EOPNOTSUPP;
793
794 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
795 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
796 if (ret)
797 return ret;
798
799 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
800 if (!pg_tb[i])
801 continue;
802
803 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
804 pg_tb[i], dcbnl_tc_param_nest);
805 if (ret)
806 return ret;
807
808 pgid = DCB_ATTR_VALUE_UNDEFINED;
809 prio = DCB_ATTR_VALUE_UNDEFINED;
810 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
811 up_map = DCB_ATTR_VALUE_UNDEFINED;
812
813 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
814 prio =
815 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
816
817 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
818 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
819
820 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
821 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
822
823 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
824 up_map =
825 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
826
827 /* dir: Tx = 0, Rx = 1 */
828 if (dir) {
829 /* Rx */
830 netdev->dcbnl_ops->setpgtccfgrx(netdev,
831 i - DCB_PG_ATTR_TC_0,
832 prio, pgid, tc_pct, up_map);
833 } else {
834 /* Tx */
835 netdev->dcbnl_ops->setpgtccfgtx(netdev,
836 i - DCB_PG_ATTR_TC_0,
837 prio, pgid, tc_pct, up_map);
838 }
839 }
840
841 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
842 if (!pg_tb[i])
843 continue;
844
845 tc_pct = nla_get_u8(pg_tb[i]);
846
847 /* dir: Tx = 0, Rx = 1 */
848 if (dir) {
849 /* Rx */
850 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
851 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
852 } else {
853 /* Tx */
854 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
855 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
856 }
857 }
858
859 return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
860 }
861
862 static int dcbnl_pgtx_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, 0);
866 }
867
868 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
869 u32 seq, struct nlattr **tb, struct sk_buff *skb)
870 {
871 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
872 }
873
874 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
875 u32 seq, struct nlattr **tb, struct sk_buff *skb)
876 {
877 struct nlattr *bcn_nest;
878 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
879 u8 value_byte;
880 u32 value_integer;
881 int ret;
882 bool getall = false;
883 int i;
884
885 if (!tb[DCB_ATTR_BCN])
886 return -EINVAL;
887
888 if (!netdev->dcbnl_ops->getbcnrp ||
889 !netdev->dcbnl_ops->getbcncfg)
890 return -EOPNOTSUPP;
891
892 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
893 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
894 if (ret)
895 return ret;
896
897 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
898 if (!bcn_nest)
899 return -EMSGSIZE;
900
901 if (bcn_tb[DCB_BCN_ATTR_ALL])
902 getall = true;
903
904 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
905 if (!getall && !bcn_tb[i])
906 continue;
907
908 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
909 &value_byte);
910 ret = nla_put_u8(skb, i, value_byte);
911 if (ret)
912 goto err_bcn;
913 }
914
915 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
916 if (!getall && !bcn_tb[i])
917 continue;
918
919 netdev->dcbnl_ops->getbcncfg(netdev, i,
920 &value_integer);
921 ret = nla_put_u32(skb, i, value_integer);
922 if (ret)
923 goto err_bcn;
924 }
925
926 nla_nest_end(skb, bcn_nest);
927
928 return 0;
929
930 err_bcn:
931 nla_nest_cancel(skb, bcn_nest);
932 return ret;
933 }
934
935 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
936 u32 seq, struct nlattr **tb, struct sk_buff *skb)
937 {
938 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
939 int i;
940 int ret;
941 u8 value_byte;
942 u32 value_int;
943
944 if (!tb[DCB_ATTR_BCN])
945 return -EINVAL;
946
947 if (!netdev->dcbnl_ops->setbcncfg ||
948 !netdev->dcbnl_ops->setbcnrp)
949 return -EOPNOTSUPP;
950
951 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
952 tb[DCB_ATTR_BCN],
953 dcbnl_pfc_up_nest);
954 if (ret)
955 return ret;
956
957 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
958 if (data[i] == NULL)
959 continue;
960 value_byte = nla_get_u8(data[i]);
961 netdev->dcbnl_ops->setbcnrp(netdev,
962 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
963 }
964
965 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
966 if (data[i] == NULL)
967 continue;
968 value_int = nla_get_u32(data[i]);
969 netdev->dcbnl_ops->setbcncfg(netdev,
970 i, value_int);
971 }
972
973 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
974 }
975
976 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
977 int app_nested_type, int app_info_type,
978 int app_entry_type)
979 {
980 struct dcb_peer_app_info info;
981 struct dcb_app *table = NULL;
982 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
983 u16 app_count;
984 int err;
985
986
987 /**
988 * retrieve the peer app configuration form the driver. If the driver
989 * handlers fail exit without doing anything
990 */
991 err = ops->peer_getappinfo(netdev, &info, &app_count);
992 if (!err && app_count) {
993 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
994 if (!table)
995 return -ENOMEM;
996
997 err = ops->peer_getapptable(netdev, table);
998 }
999
1000 if (!err) {
1001 u16 i;
1002 struct nlattr *app;
1003
1004 /**
1005 * build the message, from here on the only possible failure
1006 * is due to the skb size
1007 */
1008 err = -EMSGSIZE;
1009
1010 app = nla_nest_start(skb, app_nested_type);
1011 if (!app)
1012 goto nla_put_failure;
1013
1014 if (app_info_type &&
1015 nla_put(skb, app_info_type, sizeof(info), &info))
1016 goto nla_put_failure;
1017
1018 for (i = 0; i < app_count; i++) {
1019 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1020 &table[i]))
1021 goto nla_put_failure;
1022 }
1023 nla_nest_end(skb, app);
1024 }
1025 err = 0;
1026
1027 nla_put_failure:
1028 kfree(table);
1029 return err;
1030 }
1031
1032 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */
1033 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1034 {
1035 struct nlattr *ieee, *app;
1036 struct dcb_app_type *itr;
1037 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1038 int dcbx;
1039 int err;
1040
1041 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1042 return -EMSGSIZE;
1043
1044 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1045 if (!ieee)
1046 return -EMSGSIZE;
1047
1048 if (ops->ieee_getets) {
1049 struct ieee_ets ets;
1050 memset(&ets, 0, sizeof(ets));
1051 err = ops->ieee_getets(netdev, &ets);
1052 if (!err &&
1053 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1054 return -EMSGSIZE;
1055 }
1056
1057 if (ops->ieee_getmaxrate) {
1058 struct ieee_maxrate maxrate;
1059 memset(&maxrate, 0, sizeof(maxrate));
1060 err = ops->ieee_getmaxrate(netdev, &maxrate);
1061 if (!err) {
1062 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1063 sizeof(maxrate), &maxrate);
1064 if (err)
1065 return -EMSGSIZE;
1066 }
1067 }
1068
1069 if (ops->ieee_getqcn) {
1070 struct ieee_qcn qcn;
1071
1072 memset(&qcn, 0, sizeof(qcn));
1073 err = ops->ieee_getqcn(netdev, &qcn);
1074 if (!err) {
1075 err = nla_put(skb, DCB_ATTR_IEEE_QCN,
1076 sizeof(qcn), &qcn);
1077 if (err)
1078 return -EMSGSIZE;
1079 }
1080 }
1081
1082 if (ops->ieee_getqcnstats) {
1083 struct ieee_qcn_stats qcn_stats;
1084
1085 memset(&qcn_stats, 0, sizeof(qcn_stats));
1086 err = ops->ieee_getqcnstats(netdev, &qcn_stats);
1087 if (!err) {
1088 err = nla_put(skb, DCB_ATTR_IEEE_QCN_STATS,
1089 sizeof(qcn_stats), &qcn_stats);
1090 if (err)
1091 return -EMSGSIZE;
1092 }
1093 }
1094
1095 if (ops->ieee_getpfc) {
1096 struct ieee_pfc pfc;
1097 memset(&pfc, 0, sizeof(pfc));
1098 err = ops->ieee_getpfc(netdev, &pfc);
1099 if (!err &&
1100 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1101 return -EMSGSIZE;
1102 }
1103
1104 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1105 if (!app)
1106 return -EMSGSIZE;
1107
1108 spin_lock_bh(&dcb_lock);
1109 list_for_each_entry(itr, &dcb_app_list, list) {
1110 if (itr->ifindex == netdev->ifindex) {
1111 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1112 &itr->app);
1113 if (err) {
1114 spin_unlock_bh(&dcb_lock);
1115 return -EMSGSIZE;
1116 }
1117 }
1118 }
1119
1120 if (netdev->dcbnl_ops->getdcbx)
1121 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1122 else
1123 dcbx = -EOPNOTSUPP;
1124
1125 spin_unlock_bh(&dcb_lock);
1126 nla_nest_end(skb, app);
1127
1128 /* get peer info if available */
1129 if (ops->ieee_peer_getets) {
1130 struct ieee_ets ets;
1131 memset(&ets, 0, sizeof(ets));
1132 err = ops->ieee_peer_getets(netdev, &ets);
1133 if (!err &&
1134 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1135 return -EMSGSIZE;
1136 }
1137
1138 if (ops->ieee_peer_getpfc) {
1139 struct ieee_pfc pfc;
1140 memset(&pfc, 0, sizeof(pfc));
1141 err = ops->ieee_peer_getpfc(netdev, &pfc);
1142 if (!err &&
1143 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1144 return -EMSGSIZE;
1145 }
1146
1147 if (ops->peer_getappinfo && ops->peer_getapptable) {
1148 err = dcbnl_build_peer_app(netdev, skb,
1149 DCB_ATTR_IEEE_PEER_APP,
1150 DCB_ATTR_IEEE_APP_UNSPEC,
1151 DCB_ATTR_IEEE_APP);
1152 if (err)
1153 return -EMSGSIZE;
1154 }
1155
1156 nla_nest_end(skb, ieee);
1157 if (dcbx >= 0) {
1158 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1159 if (err)
1160 return -EMSGSIZE;
1161 }
1162
1163 return 0;
1164 }
1165
1166 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1167 int dir)
1168 {
1169 u8 pgid, up_map, prio, tc_pct;
1170 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1171 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1172 struct nlattr *pg = nla_nest_start(skb, i);
1173
1174 if (!pg)
1175 return -EMSGSIZE;
1176
1177 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1178 struct nlattr *tc_nest = nla_nest_start(skb, i);
1179
1180 if (!tc_nest)
1181 return -EMSGSIZE;
1182
1183 pgid = DCB_ATTR_VALUE_UNDEFINED;
1184 prio = DCB_ATTR_VALUE_UNDEFINED;
1185 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1186 up_map = DCB_ATTR_VALUE_UNDEFINED;
1187
1188 if (!dir)
1189 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1190 &prio, &pgid, &tc_pct, &up_map);
1191 else
1192 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1193 &prio, &pgid, &tc_pct, &up_map);
1194
1195 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1196 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1197 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1198 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1199 return -EMSGSIZE;
1200 nla_nest_end(skb, tc_nest);
1201 }
1202
1203 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1204 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1205
1206 if (!dir)
1207 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1208 &tc_pct);
1209 else
1210 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1211 &tc_pct);
1212 if (nla_put_u8(skb, i, tc_pct))
1213 return -EMSGSIZE;
1214 }
1215 nla_nest_end(skb, pg);
1216 return 0;
1217 }
1218
1219 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1220 {
1221 struct nlattr *cee, *app;
1222 struct dcb_app_type *itr;
1223 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1224 int dcbx, i, err = -EMSGSIZE;
1225 u8 value;
1226
1227 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1228 goto nla_put_failure;
1229 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1230 if (!cee)
1231 goto nla_put_failure;
1232
1233 /* local pg */
1234 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1235 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1236 if (err)
1237 goto nla_put_failure;
1238 }
1239
1240 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1241 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1242 if (err)
1243 goto nla_put_failure;
1244 }
1245
1246 /* local pfc */
1247 if (ops->getpfccfg) {
1248 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1249
1250 if (!pfc_nest)
1251 goto nla_put_failure;
1252
1253 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1254 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1255 if (nla_put_u8(skb, i, value))
1256 goto nla_put_failure;
1257 }
1258 nla_nest_end(skb, pfc_nest);
1259 }
1260
1261 /* local app */
1262 spin_lock_bh(&dcb_lock);
1263 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1264 if (!app)
1265 goto dcb_unlock;
1266
1267 list_for_each_entry(itr, &dcb_app_list, list) {
1268 if (itr->ifindex == netdev->ifindex) {
1269 struct nlattr *app_nest = nla_nest_start(skb,
1270 DCB_ATTR_APP);
1271 if (!app_nest)
1272 goto dcb_unlock;
1273
1274 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1275 itr->app.selector);
1276 if (err)
1277 goto dcb_unlock;
1278
1279 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1280 itr->app.protocol);
1281 if (err)
1282 goto dcb_unlock;
1283
1284 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1285 itr->app.priority);
1286 if (err)
1287 goto dcb_unlock;
1288
1289 nla_nest_end(skb, app_nest);
1290 }
1291 }
1292 nla_nest_end(skb, app);
1293
1294 if (netdev->dcbnl_ops->getdcbx)
1295 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1296 else
1297 dcbx = -EOPNOTSUPP;
1298
1299 spin_unlock_bh(&dcb_lock);
1300
1301 /* features flags */
1302 if (ops->getfeatcfg) {
1303 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1304 if (!feat)
1305 goto nla_put_failure;
1306
1307 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1308 i++)
1309 if (!ops->getfeatcfg(netdev, i, &value) &&
1310 nla_put_u8(skb, i, value))
1311 goto nla_put_failure;
1312
1313 nla_nest_end(skb, feat);
1314 }
1315
1316 /* peer info if available */
1317 if (ops->cee_peer_getpg) {
1318 struct cee_pg pg;
1319 memset(&pg, 0, sizeof(pg));
1320 err = ops->cee_peer_getpg(netdev, &pg);
1321 if (!err &&
1322 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1323 goto nla_put_failure;
1324 }
1325
1326 if (ops->cee_peer_getpfc) {
1327 struct cee_pfc pfc;
1328 memset(&pfc, 0, sizeof(pfc));
1329 err = ops->cee_peer_getpfc(netdev, &pfc);
1330 if (!err &&
1331 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1332 goto nla_put_failure;
1333 }
1334
1335 if (ops->peer_getappinfo && ops->peer_getapptable) {
1336 err = dcbnl_build_peer_app(netdev, skb,
1337 DCB_ATTR_CEE_PEER_APP_TABLE,
1338 DCB_ATTR_CEE_PEER_APP_INFO,
1339 DCB_ATTR_CEE_PEER_APP);
1340 if (err)
1341 goto nla_put_failure;
1342 }
1343 nla_nest_end(skb, cee);
1344
1345 /* DCBX state */
1346 if (dcbx >= 0) {
1347 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1348 if (err)
1349 goto nla_put_failure;
1350 }
1351 return 0;
1352
1353 dcb_unlock:
1354 spin_unlock_bh(&dcb_lock);
1355 nla_put_failure:
1356 err = -EMSGSIZE;
1357 return err;
1358 }
1359
1360 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1361 u32 seq, u32 portid, int dcbx_ver)
1362 {
1363 struct net *net = dev_net(dev);
1364 struct sk_buff *skb;
1365 struct nlmsghdr *nlh;
1366 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1367 int err;
1368
1369 if (!ops)
1370 return -EOPNOTSUPP;
1371
1372 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1373 if (!skb)
1374 return -ENOBUFS;
1375
1376 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1377 err = dcbnl_ieee_fill(skb, dev);
1378 else
1379 err = dcbnl_cee_fill(skb, dev);
1380
1381 if (err < 0) {
1382 /* Report error to broadcast listeners */
1383 nlmsg_free(skb);
1384 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1385 } else {
1386 /* End nlmsg and notify broadcast listeners */
1387 nlmsg_end(skb, nlh);
1388 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1389 }
1390
1391 return err;
1392 }
1393
1394 int dcbnl_ieee_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_IEEE);
1398 }
1399 EXPORT_SYMBOL(dcbnl_ieee_notify);
1400
1401 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1402 u32 seq, u32 portid)
1403 {
1404 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1405 }
1406 EXPORT_SYMBOL(dcbnl_cee_notify);
1407
1408 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb SET commands.
1409 * If any requested operation can not be completed
1410 * the entire msg is aborted and error value is returned.
1411 * No attempt is made to reconcile the case where only part of the
1412 * cmd can be completed.
1413 */
1414 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1415 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1416 {
1417 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1418 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1419 int err;
1420
1421 if (!ops)
1422 return -EOPNOTSUPP;
1423
1424 if (!tb[DCB_ATTR_IEEE])
1425 return -EINVAL;
1426
1427 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1428 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1429 if (err)
1430 return err;
1431
1432 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1433 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1434 err = ops->ieee_setets(netdev, ets);
1435 if (err)
1436 goto err;
1437 }
1438
1439 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1440 struct ieee_maxrate *maxrate =
1441 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1442 err = ops->ieee_setmaxrate(netdev, maxrate);
1443 if (err)
1444 goto err;
1445 }
1446
1447 if (ieee[DCB_ATTR_IEEE_QCN] && ops->ieee_setqcn) {
1448 struct ieee_qcn *qcn =
1449 nla_data(ieee[DCB_ATTR_IEEE_QCN]);
1450
1451 err = ops->ieee_setqcn(netdev, qcn);
1452 if (err)
1453 goto err;
1454 }
1455
1456 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1457 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1458 err = ops->ieee_setpfc(netdev, pfc);
1459 if (err)
1460 goto err;
1461 }
1462
1463 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1464 struct nlattr *attr;
1465 int rem;
1466
1467 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1468 struct dcb_app *app_data;
1469 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1470 continue;
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,
1512 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
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, tb[DCB_ATTR_FEATCFG],
1585 dcbnl_featcfg_nest);
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, tb[DCB_ATTR_FEATCFG],
1629 dcbnl_featcfg_nest);
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 {
1704 struct net *net = sock_net(skb->sk);
1705 struct net_device *netdev;
1706 struct dcbmsg *dcb = nlmsg_data(nlh);
1707 struct nlattr *tb[DCB_ATTR_MAX + 1];
1708 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1709 int ret = -EINVAL;
1710 struct sk_buff *reply_skb;
1711 struct nlmsghdr *reply_nlh = NULL;
1712 const struct reply_func *fn;
1713
1714 if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
1715 return -EPERM;
1716
1717 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1718 dcbnl_rtnl_policy);
1719 if (ret < 0)
1720 return ret;
1721
1722 if (dcb->cmd > DCB_CMD_MAX)
1723 return -EINVAL;
1724
1725 /* check if a reply function has been defined for the command */
1726 fn = &reply_funcs[dcb->cmd];
1727 if (!fn->cb)
1728 return -EOPNOTSUPP;
1729
1730 if (!tb[DCB_ATTR_IFNAME])
1731 return -EINVAL;
1732
1733 netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1734 if (!netdev)
1735 return -ENODEV;
1736
1737 if (!netdev->dcbnl_ops)
1738 return -EOPNOTSUPP;
1739
1740 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1741 nlh->nlmsg_flags, &reply_nlh);
1742 if (!reply_skb)
1743 return -ENOBUFS;
1744
1745 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1746 if (ret < 0) {
1747 nlmsg_free(reply_skb);
1748 goto out;
1749 }
1750
1751 nlmsg_end(reply_skb, reply_nlh);
1752
1753 ret = rtnl_unicast(reply_skb, net, portid);
1754 out:
1755 return ret;
1756 }
1757
1758 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1759 int ifindex, int prio)
1760 {
1761 struct dcb_app_type *itr;
1762
1763 list_for_each_entry(itr, &dcb_app_list, list) {
1764 if (itr->app.selector == app->selector &&
1765 itr->app.protocol == app->protocol &&
1766 itr->ifindex == ifindex &&
1767 (!prio || itr->app.priority == prio))
1768 return itr;
1769 }
1770
1771 return NULL;
1772 }
1773
1774 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1775 {
1776 struct dcb_app_type *entry;
1777
1778 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1779 if (!entry)
1780 return -ENOMEM;
1781
1782 memcpy(&entry->app, app, sizeof(*app));
1783 entry->ifindex = ifindex;
1784 list_add(&entry->list, &dcb_app_list);
1785
1786 return 0;
1787 }
1788
1789 /**
1790 * dcb_getapp - retrieve the DCBX application user priority
1791 *
1792 * On success returns a non-zero 802.1p user priority bitmap
1793 * otherwise returns 0 as the invalid user priority bitmap to
1794 * indicate an error.
1795 */
1796 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1797 {
1798 struct dcb_app_type *itr;
1799 u8 prio = 0;
1800
1801 spin_lock_bh(&dcb_lock);
1802 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1803 prio = itr->app.priority;
1804 spin_unlock_bh(&dcb_lock);
1805
1806 return prio;
1807 }
1808 EXPORT_SYMBOL(dcb_getapp);
1809
1810 /**
1811 * dcb_setapp - add CEE dcb application data to app list
1812 *
1813 * Priority 0 is an invalid priority in CEE spec. This routine
1814 * removes applications from the app list if the priority is
1815 * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap
1816 */
1817 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1818 {
1819 struct dcb_app_type *itr;
1820 struct dcb_app_type event;
1821 int err = 0;
1822
1823 event.ifindex = dev->ifindex;
1824 memcpy(&event.app, new, sizeof(event.app));
1825 if (dev->dcbnl_ops->getdcbx)
1826 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1827
1828 spin_lock_bh(&dcb_lock);
1829 /* Search for existing match and replace */
1830 if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1831 if (new->priority)
1832 itr->app.priority = new->priority;
1833 else {
1834 list_del(&itr->list);
1835 kfree(itr);
1836 }
1837 goto out;
1838 }
1839 /* App type does not exist add new application type */
1840 if (new->priority)
1841 err = dcb_app_add(new, dev->ifindex);
1842 out:
1843 spin_unlock_bh(&dcb_lock);
1844 if (!err)
1845 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1846 return err;
1847 }
1848 EXPORT_SYMBOL(dcb_setapp);
1849
1850 /**
1851 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1852 *
1853 * Helper routine which on success returns a non-zero 802.1Qaz user
1854 * priority bitmap otherwise returns 0 to indicate the dcb_app was
1855 * not found in APP list.
1856 */
1857 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1858 {
1859 struct dcb_app_type *itr;
1860 u8 prio = 0;
1861
1862 spin_lock_bh(&dcb_lock);
1863 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1864 prio |= 1 << itr->app.priority;
1865 spin_unlock_bh(&dcb_lock);
1866
1867 return prio;
1868 }
1869 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1870
1871 /**
1872 * dcb_ieee_setapp - add IEEE dcb application data to app list
1873 *
1874 * This adds Application data to the list. Multiple application
1875 * entries may exists for the same selector and protocol as long
1876 * as the priorities are different. Priority is expected to be a
1877 * 3-bit unsigned integer
1878 */
1879 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1880 {
1881 struct dcb_app_type event;
1882 int err = 0;
1883
1884 event.ifindex = dev->ifindex;
1885 memcpy(&event.app, new, sizeof(event.app));
1886 if (dev->dcbnl_ops->getdcbx)
1887 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1888
1889 spin_lock_bh(&dcb_lock);
1890 /* Search for existing match and abort if found */
1891 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1892 err = -EEXIST;
1893 goto out;
1894 }
1895
1896 err = dcb_app_add(new, dev->ifindex);
1897 out:
1898 spin_unlock_bh(&dcb_lock);
1899 if (!err)
1900 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1901 return err;
1902 }
1903 EXPORT_SYMBOL(dcb_ieee_setapp);
1904
1905 /**
1906 * dcb_ieee_delapp - delete IEEE dcb application data from list
1907 *
1908 * This removes a matching APP data from the APP list
1909 */
1910 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1911 {
1912 struct dcb_app_type *itr;
1913 struct dcb_app_type event;
1914 int err = -ENOENT;
1915
1916 event.ifindex = dev->ifindex;
1917 memcpy(&event.app, del, sizeof(event.app));
1918 if (dev->dcbnl_ops->getdcbx)
1919 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1920
1921 spin_lock_bh(&dcb_lock);
1922 /* Search for existing match and remove it. */
1923 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1924 list_del(&itr->list);
1925 kfree(itr);
1926 err = 0;
1927 }
1928
1929 spin_unlock_bh(&dcb_lock);
1930 if (!err)
1931 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1932 return err;
1933 }
1934 EXPORT_SYMBOL(dcb_ieee_delapp);
1935
1936 static int __init dcbnl_init(void)
1937 {
1938 INIT_LIST_HEAD(&dcb_app_list);
1939
1940 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1941 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1942
1943 return 0;
1944 }
1945 device_initcall(dcbnl_init);
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