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hyperv: Add processing of MTU reduced by the host
[linux/fpc-iii.git] / net / dcb / dcbnl.c
blobca11d283bbebe3ae02345ecd72cb022ae7c43667
1 /*
2 * Copyright (c) 2008-2011, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, see <http://www.gnu.org/licenses/>.
15 *
16 * Author: Lucy Liu <lucy.liu@intel.com>
17 */
18
19 #include <linux/netdevice.h>
20 #include <linux/netlink.h>
21 #include <linux/slab.h>
22 #include <net/netlink.h>
23 #include <net/rtnetlink.h>
24 #include <linux/dcbnl.h>
25 #include <net/dcbevent.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/module.h>
28 #include <net/sock.h>
29
30 /* Data Center Bridging (DCB) is a collection of Ethernet enhancements
31 * intended to allow network traffic with differing requirements
32 * (highly reliable, no drops vs. best effort vs. low latency) to operate
33 * and co-exist on Ethernet. Current DCB features are:
34 *
35 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
36 * framework for assigning bandwidth guarantees to traffic classes.
37 *
38 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
39 * can work independently for each 802.1p priority.
40 *
41 * Congestion Notification - provides a mechanism for end-to-end congestion
42 * control for protocols which do not have built-in congestion management.
43 *
44 * More information about the emerging standards for these Ethernet features
45 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
46 *
47 * This file implements an rtnetlink interface to allow configuration of DCB
48 * features for capable devices.
49 */
50
51 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
52 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
53 MODULE_LICENSE("GPL");
54
55 /**************** DCB attribute policies *************************************/
56
57 /* DCB netlink attributes policy */
58 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
59 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
60 [DCB_ATTR_STATE] = {.type = NLA_U8},
61 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
62 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
63 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
64 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
65 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
66 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
67 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
68 [DCB_ATTR_APP] = {.type = NLA_NESTED},
69 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
70 [DCB_ATTR_DCBX] = {.type = NLA_U8},
71 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
72 };
73
74 /* DCB priority flow control to User Priority nested attributes */
75 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
76 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
85 };
86
87 /* DCB priority grouping nested attributes */
88 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
89 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
107 };
108
109 /* DCB traffic class nested attributes. */
110 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
111 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
112 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
113 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
116 };
117
118 /* DCB capabilities nested attributes. */
119 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
120 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
121 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
122 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
123 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
129 };
130
131 /* DCB capabilities nested attributes. */
132 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
133 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
134 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
135 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
136 };
137
138 /* DCB BCN nested attributes. */
139 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
140 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
141 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
149 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
150 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
165 };
166
167 /* DCB APP nested attributes. */
168 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
169 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
170 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
171 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
172 };
173
174 /* IEEE 802.1Qaz nested attributes. */
175 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
176 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
177 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
178 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
179 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
180 };
181
182 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
183 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
184 };
185
186 /* DCB number of traffic classes nested attributes. */
187 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
188 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
189 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
190 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
191 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
192 };
193
194 static LIST_HEAD(dcb_app_list);
195 static DEFINE_SPINLOCK(dcb_lock);
196
197 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
198 u32 flags, struct nlmsghdr **nlhp)
199 {
200 struct sk_buff *skb;
201 struct dcbmsg *dcb;
202 struct nlmsghdr *nlh;
203
204 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
205 if (!skb)
206 return NULL;
207
208 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
209 BUG_ON(!nlh);
210
211 dcb = nlmsg_data(nlh);
212 dcb->dcb_family = AF_UNSPEC;
213 dcb->cmd = cmd;
214 dcb->dcb_pad = 0;
215
216 if (nlhp)
217 *nlhp = nlh;
218
219 return skb;
220 }
221
222 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
223 u32 seq, struct nlattr **tb, struct sk_buff *skb)
224 {
225 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
226 if (!netdev->dcbnl_ops->getstate)
227 return -EOPNOTSUPP;
228
229 return nla_put_u8(skb, DCB_ATTR_STATE,
230 netdev->dcbnl_ops->getstate(netdev));
231 }
232
233 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
234 u32 seq, struct nlattr **tb, struct sk_buff *skb)
235 {
236 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
237 u8 value;
238 int ret;
239 int i;
240 int getall = 0;
241
242 if (!tb[DCB_ATTR_PFC_CFG])
243 return -EINVAL;
244
245 if (!netdev->dcbnl_ops->getpfccfg)
246 return -EOPNOTSUPP;
247
248 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
249 tb[DCB_ATTR_PFC_CFG],
250 dcbnl_pfc_up_nest);
251 if (ret)
252 return ret;
253
254 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
255 if (!nest)
256 return -EMSGSIZE;
257
258 if (data[DCB_PFC_UP_ATTR_ALL])
259 getall = 1;
260
261 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
262 if (!getall && !data[i])
263 continue;
264
265 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
266 &value);
267 ret = nla_put_u8(skb, i, value);
268 if (ret) {
269 nla_nest_cancel(skb, nest);
270 return ret;
271 }
272 }
273 nla_nest_end(skb, nest);
274
275 return 0;
276 }
277
278 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
279 u32 seq, struct nlattr **tb, struct sk_buff *skb)
280 {
281 u8 perm_addr[MAX_ADDR_LEN];
282
283 if (!netdev->dcbnl_ops->getpermhwaddr)
284 return -EOPNOTSUPP;
285
286 memset(perm_addr, 0, sizeof(perm_addr));
287 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
288
289 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
290 }
291
292 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
293 u32 seq, struct nlattr **tb, struct sk_buff *skb)
294 {
295 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
296 u8 value;
297 int ret;
298 int i;
299 int getall = 0;
300
301 if (!tb[DCB_ATTR_CAP])
302 return -EINVAL;
303
304 if (!netdev->dcbnl_ops->getcap)
305 return -EOPNOTSUPP;
306
307 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
308 dcbnl_cap_nest);
309 if (ret)
310 return ret;
311
312 nest = nla_nest_start(skb, DCB_ATTR_CAP);
313 if (!nest)
314 return -EMSGSIZE;
315
316 if (data[DCB_CAP_ATTR_ALL])
317 getall = 1;
318
319 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
320 if (!getall && !data[i])
321 continue;
322
323 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
324 ret = nla_put_u8(skb, i, value);
325 if (ret) {
326 nla_nest_cancel(skb, nest);
327 return ret;
328 }
329 }
330 }
331 nla_nest_end(skb, nest);
332
333 return 0;
334 }
335
336 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
337 u32 seq, struct nlattr **tb, struct sk_buff *skb)
338 {
339 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
340 u8 value;
341 int ret;
342 int i;
343 int getall = 0;
344
345 if (!tb[DCB_ATTR_NUMTCS])
346 return -EINVAL;
347
348 if (!netdev->dcbnl_ops->getnumtcs)
349 return -EOPNOTSUPP;
350
351 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
352 dcbnl_numtcs_nest);
353 if (ret)
354 return ret;
355
356 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
357 if (!nest)
358 return -EMSGSIZE;
359
360 if (data[DCB_NUMTCS_ATTR_ALL])
361 getall = 1;
362
363 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
364 if (!getall && !data[i])
365 continue;
366
367 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
368 if (!ret) {
369 ret = nla_put_u8(skb, i, value);
370 if (ret) {
371 nla_nest_cancel(skb, nest);
372 return ret;
373 }
374 } else
375 return -EINVAL;
376 }
377 nla_nest_end(skb, nest);
378
379 return 0;
380 }
381
382 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
383 u32 seq, struct nlattr **tb, struct sk_buff *skb)
384 {
385 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
386 int ret;
387 u8 value;
388 int i;
389
390 if (!tb[DCB_ATTR_NUMTCS])
391 return -EINVAL;
392
393 if (!netdev->dcbnl_ops->setnumtcs)
394 return -EOPNOTSUPP;
395
396 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
397 dcbnl_numtcs_nest);
398 if (ret)
399 return ret;
400
401 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
402 if (data[i] == NULL)
403 continue;
404
405 value = nla_get_u8(data[i]);
406
407 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
408 if (ret)
409 break;
410 }
411
412 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
413 }
414
415 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
416 u32 seq, struct nlattr **tb, struct sk_buff *skb)
417 {
418 if (!netdev->dcbnl_ops->getpfcstate)
419 return -EOPNOTSUPP;
420
421 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
422 netdev->dcbnl_ops->getpfcstate(netdev));
423 }
424
425 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
426 u32 seq, struct nlattr **tb, struct sk_buff *skb)
427 {
428 u8 value;
429
430 if (!tb[DCB_ATTR_PFC_STATE])
431 return -EINVAL;
432
433 if (!netdev->dcbnl_ops->setpfcstate)
434 return -EOPNOTSUPP;
435
436 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
437
438 netdev->dcbnl_ops->setpfcstate(netdev, value);
439
440 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
441 }
442
443 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
444 u32 seq, struct nlattr **tb, struct sk_buff *skb)
445 {
446 struct nlattr *app_nest;
447 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
448 u16 id;
449 u8 up, idtype;
450 int ret;
451
452 if (!tb[DCB_ATTR_APP])
453 return -EINVAL;
454
455 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
456 dcbnl_app_nest);
457 if (ret)
458 return ret;
459
460 /* all must be non-null */
461 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
462 (!app_tb[DCB_APP_ATTR_ID]))
463 return -EINVAL;
464
465 /* either by eth type or by socket number */
466 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
467 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
468 (idtype != DCB_APP_IDTYPE_PORTNUM))
469 return -EINVAL;
470
471 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
472
473 if (netdev->dcbnl_ops->getapp) {
474 ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
475 if (ret < 0)
476 return ret;
477 else
478 up = ret;
479 } else {
480 struct dcb_app app = {
481 .selector = idtype,
482 .protocol = id,
483 };
484 up = dcb_getapp(netdev, &app);
485 }
486
487 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
488 if (!app_nest)
489 return -EMSGSIZE;
490
491 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
492 if (ret)
493 goto out_cancel;
494
495 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
496 if (ret)
497 goto out_cancel;
498
499 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
500 if (ret)
501 goto out_cancel;
502
503 nla_nest_end(skb, app_nest);
504
505 return 0;
506
507 out_cancel:
508 nla_nest_cancel(skb, app_nest);
509 return ret;
510 }
511
512 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
513 u32 seq, struct nlattr **tb, struct sk_buff *skb)
514 {
515 int ret;
516 u16 id;
517 u8 up, idtype;
518 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
519
520 if (!tb[DCB_ATTR_APP])
521 return -EINVAL;
522
523 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
524 dcbnl_app_nest);
525 if (ret)
526 return ret;
527
528 /* all must be non-null */
529 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
530 (!app_tb[DCB_APP_ATTR_ID]) ||
531 (!app_tb[DCB_APP_ATTR_PRIORITY]))
532 return -EINVAL;
533
534 /* either by eth type or by socket number */
535 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
536 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
537 (idtype != DCB_APP_IDTYPE_PORTNUM))
538 return -EINVAL;
539
540 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
541 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
542
543 if (netdev->dcbnl_ops->setapp) {
544 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
545 if (ret < 0)
546 return ret;
547 } else {
548 struct dcb_app app;
549 app.selector = idtype;
550 app.protocol = id;
551 app.priority = up;
552 ret = dcb_setapp(netdev, &app);
553 }
554
555 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
556 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
557
558 return ret;
559 }
560
561 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
562 struct nlattr **tb, struct sk_buff *skb, int dir)
563 {
564 struct nlattr *pg_nest, *param_nest, *data;
565 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
566 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
567 u8 prio, pgid, tc_pct, up_map;
568 int ret;
569 int getall = 0;
570 int i;
571
572 if (!tb[DCB_ATTR_PG_CFG])
573 return -EINVAL;
574
575 if (!netdev->dcbnl_ops->getpgtccfgtx ||
576 !netdev->dcbnl_ops->getpgtccfgrx ||
577 !netdev->dcbnl_ops->getpgbwgcfgtx ||
578 !netdev->dcbnl_ops->getpgbwgcfgrx)
579 return -EOPNOTSUPP;
580
581 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
582 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
583 if (ret)
584 return ret;
585
586 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
587 if (!pg_nest)
588 return -EMSGSIZE;
589
590 if (pg_tb[DCB_PG_ATTR_TC_ALL])
591 getall = 1;
592
593 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
594 if (!getall && !pg_tb[i])
595 continue;
596
597 if (pg_tb[DCB_PG_ATTR_TC_ALL])
598 data = pg_tb[DCB_PG_ATTR_TC_ALL];
599 else
600 data = pg_tb[i];
601 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
602 data, dcbnl_tc_param_nest);
603 if (ret)
604 goto err_pg;
605
606 param_nest = nla_nest_start(skb, i);
607 if (!param_nest)
608 goto err_pg;
609
610 pgid = DCB_ATTR_VALUE_UNDEFINED;
611 prio = DCB_ATTR_VALUE_UNDEFINED;
612 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
613 up_map = DCB_ATTR_VALUE_UNDEFINED;
614
615 if (dir) {
616 /* Rx */
617 netdev->dcbnl_ops->getpgtccfgrx(netdev,
618 i - DCB_PG_ATTR_TC_0, &prio,
619 &pgid, &tc_pct, &up_map);
620 } else {
621 /* Tx */
622 netdev->dcbnl_ops->getpgtccfgtx(netdev,
623 i - DCB_PG_ATTR_TC_0, &prio,
624 &pgid, &tc_pct, &up_map);
625 }
626
627 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
628 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
629 ret = nla_put_u8(skb,
630 DCB_TC_ATTR_PARAM_PGID, pgid);
631 if (ret)
632 goto err_param;
633 }
634 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
635 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
636 ret = nla_put_u8(skb,
637 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
638 if (ret)
639 goto err_param;
640 }
641 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
642 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
643 ret = nla_put_u8(skb,
644 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
645 if (ret)
646 goto err_param;
647 }
648 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
649 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
650 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
651 tc_pct);
652 if (ret)
653 goto err_param;
654 }
655 nla_nest_end(skb, param_nest);
656 }
657
658 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
659 getall = 1;
660 else
661 getall = 0;
662
663 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
664 if (!getall && !pg_tb[i])
665 continue;
666
667 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
668
669 if (dir) {
670 /* Rx */
671 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
672 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
673 } else {
674 /* Tx */
675 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
676 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
677 }
678 ret = nla_put_u8(skb, i, tc_pct);
679 if (ret)
680 goto err_pg;
681 }
682
683 nla_nest_end(skb, pg_nest);
684
685 return 0;
686
687 err_param:
688 nla_nest_cancel(skb, param_nest);
689 err_pg:
690 nla_nest_cancel(skb, pg_nest);
691
692 return -EMSGSIZE;
693 }
694
695 static int dcbnl_pgtx_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, 0);
699 }
700
701 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
702 u32 seq, struct nlattr **tb, struct sk_buff *skb)
703 {
704 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
705 }
706
707 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
708 u32 seq, struct nlattr **tb, struct sk_buff *skb)
709 {
710 u8 value;
711
712 if (!tb[DCB_ATTR_STATE])
713 return -EINVAL;
714
715 if (!netdev->dcbnl_ops->setstate)
716 return -EOPNOTSUPP;
717
718 value = nla_get_u8(tb[DCB_ATTR_STATE]);
719
720 return nla_put_u8(skb, DCB_ATTR_STATE,
721 netdev->dcbnl_ops->setstate(netdev, value));
722 }
723
724 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
725 u32 seq, struct nlattr **tb, struct sk_buff *skb)
726 {
727 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
728 int i;
729 int ret;
730 u8 value;
731
732 if (!tb[DCB_ATTR_PFC_CFG])
733 return -EINVAL;
734
735 if (!netdev->dcbnl_ops->setpfccfg)
736 return -EOPNOTSUPP;
737
738 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
739 tb[DCB_ATTR_PFC_CFG],
740 dcbnl_pfc_up_nest);
741 if (ret)
742 return ret;
743
744 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
745 if (data[i] == NULL)
746 continue;
747 value = nla_get_u8(data[i]);
748 netdev->dcbnl_ops->setpfccfg(netdev,
749 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
750 }
751
752 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
753 }
754
755 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
756 u32 seq, struct nlattr **tb, struct sk_buff *skb)
757 {
758 int ret;
759
760 if (!tb[DCB_ATTR_SET_ALL])
761 return -EINVAL;
762
763 if (!netdev->dcbnl_ops->setall)
764 return -EOPNOTSUPP;
765
766 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
767 netdev->dcbnl_ops->setall(netdev));
768 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
769
770 return ret;
771 }
772
773 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
774 u32 seq, struct nlattr **tb, struct sk_buff *skb,
775 int dir)
776 {
777 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
778 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
779 int ret;
780 int i;
781 u8 pgid;
782 u8 up_map;
783 u8 prio;
784 u8 tc_pct;
785
786 if (!tb[DCB_ATTR_PG_CFG])
787 return -EINVAL;
788
789 if (!netdev->dcbnl_ops->setpgtccfgtx ||
790 !netdev->dcbnl_ops->setpgtccfgrx ||
791 !netdev->dcbnl_ops->setpgbwgcfgtx ||
792 !netdev->dcbnl_ops->setpgbwgcfgrx)
793 return -EOPNOTSUPP;
794
795 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
796 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
797 if (ret)
798 return ret;
799
800 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
801 if (!pg_tb[i])
802 continue;
803
804 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
805 pg_tb[i], dcbnl_tc_param_nest);
806 if (ret)
807 return ret;
808
809 pgid = DCB_ATTR_VALUE_UNDEFINED;
810 prio = DCB_ATTR_VALUE_UNDEFINED;
811 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
812 up_map = DCB_ATTR_VALUE_UNDEFINED;
813
814 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
815 prio =
816 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
817
818 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
819 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
820
821 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
822 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
823
824 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
825 up_map =
826 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
827
828 /* dir: Tx = 0, Rx = 1 */
829 if (dir) {
830 /* Rx */
831 netdev->dcbnl_ops->setpgtccfgrx(netdev,
832 i - DCB_PG_ATTR_TC_0,
833 prio, pgid, tc_pct, up_map);
834 } else {
835 /* Tx */
836 netdev->dcbnl_ops->setpgtccfgtx(netdev,
837 i - DCB_PG_ATTR_TC_0,
838 prio, pgid, tc_pct, up_map);
839 }
840 }
841
842 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
843 if (!pg_tb[i])
844 continue;
845
846 tc_pct = nla_get_u8(pg_tb[i]);
847
848 /* dir: Tx = 0, Rx = 1 */
849 if (dir) {
850 /* Rx */
851 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
852 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
853 } else {
854 /* Tx */
855 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
856 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
857 }
858 }
859
860 return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
861 }
862
863 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
864 u32 seq, struct nlattr **tb, struct sk_buff *skb)
865 {
866 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
867 }
868
869 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
870 u32 seq, struct nlattr **tb, struct sk_buff *skb)
871 {
872 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
873 }
874
875 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
876 u32 seq, struct nlattr **tb, struct sk_buff *skb)
877 {
878 struct nlattr *bcn_nest;
879 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
880 u8 value_byte;
881 u32 value_integer;
882 int ret;
883 bool getall = false;
884 int i;
885
886 if (!tb[DCB_ATTR_BCN])
887 return -EINVAL;
888
889 if (!netdev->dcbnl_ops->getbcnrp ||
890 !netdev->dcbnl_ops->getbcncfg)
891 return -EOPNOTSUPP;
892
893 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
894 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
895 if (ret)
896 return ret;
897
898 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
899 if (!bcn_nest)
900 return -EMSGSIZE;
901
902 if (bcn_tb[DCB_BCN_ATTR_ALL])
903 getall = true;
904
905 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
906 if (!getall && !bcn_tb[i])
907 continue;
908
909 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
910 &value_byte);
911 ret = nla_put_u8(skb, i, value_byte);
912 if (ret)
913 goto err_bcn;
914 }
915
916 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
917 if (!getall && !bcn_tb[i])
918 continue;
919
920 netdev->dcbnl_ops->getbcncfg(netdev, i,
921 &value_integer);
922 ret = nla_put_u32(skb, i, value_integer);
923 if (ret)
924 goto err_bcn;
925 }
926
927 nla_nest_end(skb, bcn_nest);
928
929 return 0;
930
931 err_bcn:
932 nla_nest_cancel(skb, bcn_nest);
933 return ret;
934 }
935
936 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
937 u32 seq, struct nlattr **tb, struct sk_buff *skb)
938 {
939 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
940 int i;
941 int ret;
942 u8 value_byte;
943 u32 value_int;
944
945 if (!tb[DCB_ATTR_BCN])
946 return -EINVAL;
947
948 if (!netdev->dcbnl_ops->setbcncfg ||
949 !netdev->dcbnl_ops->setbcnrp)
950 return -EOPNOTSUPP;
951
952 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
953 tb[DCB_ATTR_BCN],
954 dcbnl_pfc_up_nest);
955 if (ret)
956 return ret;
957
958 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
959 if (data[i] == NULL)
960 continue;
961 value_byte = nla_get_u8(data[i]);
962 netdev->dcbnl_ops->setbcnrp(netdev,
963 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
964 }
965
966 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
967 if (data[i] == NULL)
968 continue;
969 value_int = nla_get_u32(data[i]);
970 netdev->dcbnl_ops->setbcncfg(netdev,
971 i, value_int);
972 }
973
974 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
975 }
976
977 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
978 int app_nested_type, int app_info_type,
979 int app_entry_type)
980 {
981 struct dcb_peer_app_info info;
982 struct dcb_app *table = NULL;
983 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
984 u16 app_count;
985 int err;
986
987
988 /**
989 * retrieve the peer app configuration form the driver. If the driver
990 * handlers fail exit without doing anything
991 */
992 err = ops->peer_getappinfo(netdev, &info, &app_count);
993 if (!err && app_count) {
994 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
995 if (!table)
996 return -ENOMEM;
997
998 err = ops->peer_getapptable(netdev, table);
999 }
1000
1001 if (!err) {
1002 u16 i;
1003 struct nlattr *app;
1004
1005 /**
1006 * build the message, from here on the only possible failure
1007 * is due to the skb size
1008 */
1009 err = -EMSGSIZE;
1010
1011 app = nla_nest_start(skb, app_nested_type);
1012 if (!app)
1013 goto nla_put_failure;
1014
1015 if (app_info_type &&
1016 nla_put(skb, app_info_type, sizeof(info), &info))
1017 goto nla_put_failure;
1018
1019 for (i = 0; i < app_count; i++) {
1020 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1021 &table[i]))
1022 goto nla_put_failure;
1023 }
1024 nla_nest_end(skb, app);
1025 }
1026 err = 0;
1027
1028 nla_put_failure:
1029 kfree(table);
1030 return err;
1031 }
1032
1033 /* Handle IEEE 802.1Qaz GET commands. */
1034 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1035 {
1036 struct nlattr *ieee, *app;
1037 struct dcb_app_type *itr;
1038 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1039 int dcbx;
1040 int err;
1041
1042 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1043 return -EMSGSIZE;
1044
1045 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1046 if (!ieee)
1047 return -EMSGSIZE;
1048
1049 if (ops->ieee_getets) {
1050 struct ieee_ets ets;
1051 memset(&ets, 0, sizeof(ets));
1052 err = ops->ieee_getets(netdev, &ets);
1053 if (!err &&
1054 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1055 return -EMSGSIZE;
1056 }
1057
1058 if (ops->ieee_getmaxrate) {
1059 struct ieee_maxrate maxrate;
1060 memset(&maxrate, 0, sizeof(maxrate));
1061 err = ops->ieee_getmaxrate(netdev, &maxrate);
1062 if (!err) {
1063 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1064 sizeof(maxrate), &maxrate);
1065 if (err)
1066 return -EMSGSIZE;
1067 }
1068 }
1069
1070 if (ops->ieee_getpfc) {
1071 struct ieee_pfc pfc;
1072 memset(&pfc, 0, sizeof(pfc));
1073 err = ops->ieee_getpfc(netdev, &pfc);
1074 if (!err &&
1075 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1076 return -EMSGSIZE;
1077 }
1078
1079 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1080 if (!app)
1081 return -EMSGSIZE;
1082
1083 spin_lock(&dcb_lock);
1084 list_for_each_entry(itr, &dcb_app_list, list) {
1085 if (itr->ifindex == netdev->ifindex) {
1086 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1087 &itr->app);
1088 if (err) {
1089 spin_unlock(&dcb_lock);
1090 return -EMSGSIZE;
1091 }
1092 }
1093 }
1094
1095 if (netdev->dcbnl_ops->getdcbx)
1096 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1097 else
1098 dcbx = -EOPNOTSUPP;
1099
1100 spin_unlock(&dcb_lock);
1101 nla_nest_end(skb, app);
1102
1103 /* get peer info if available */
1104 if (ops->ieee_peer_getets) {
1105 struct ieee_ets ets;
1106 memset(&ets, 0, sizeof(ets));
1107 err = ops->ieee_peer_getets(netdev, &ets);
1108 if (!err &&
1109 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1110 return -EMSGSIZE;
1111 }
1112
1113 if (ops->ieee_peer_getpfc) {
1114 struct ieee_pfc pfc;
1115 memset(&pfc, 0, sizeof(pfc));
1116 err = ops->ieee_peer_getpfc(netdev, &pfc);
1117 if (!err &&
1118 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1119 return -EMSGSIZE;
1120 }
1121
1122 if (ops->peer_getappinfo && ops->peer_getapptable) {
1123 err = dcbnl_build_peer_app(netdev, skb,
1124 DCB_ATTR_IEEE_PEER_APP,
1125 DCB_ATTR_IEEE_APP_UNSPEC,
1126 DCB_ATTR_IEEE_APP);
1127 if (err)
1128 return -EMSGSIZE;
1129 }
1130
1131 nla_nest_end(skb, ieee);
1132 if (dcbx >= 0) {
1133 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1134 if (err)
1135 return -EMSGSIZE;
1136 }
1137
1138 return 0;
1139 }
1140
1141 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1142 int dir)
1143 {
1144 u8 pgid, up_map, prio, tc_pct;
1145 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1146 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1147 struct nlattr *pg = nla_nest_start(skb, i);
1148
1149 if (!pg)
1150 return -EMSGSIZE;
1151
1152 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1153 struct nlattr *tc_nest = nla_nest_start(skb, i);
1154
1155 if (!tc_nest)
1156 return -EMSGSIZE;
1157
1158 pgid = DCB_ATTR_VALUE_UNDEFINED;
1159 prio = DCB_ATTR_VALUE_UNDEFINED;
1160 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1161 up_map = DCB_ATTR_VALUE_UNDEFINED;
1162
1163 if (!dir)
1164 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1165 &prio, &pgid, &tc_pct, &up_map);
1166 else
1167 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1168 &prio, &pgid, &tc_pct, &up_map);
1169
1170 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1171 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1172 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1173 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1174 return -EMSGSIZE;
1175 nla_nest_end(skb, tc_nest);
1176 }
1177
1178 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1179 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1180
1181 if (!dir)
1182 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1183 &tc_pct);
1184 else
1185 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1186 &tc_pct);
1187 if (nla_put_u8(skb, i, tc_pct))
1188 return -EMSGSIZE;
1189 }
1190 nla_nest_end(skb, pg);
1191 return 0;
1192 }
1193
1194 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1195 {
1196 struct nlattr *cee, *app;
1197 struct dcb_app_type *itr;
1198 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1199 int dcbx, i, err = -EMSGSIZE;
1200 u8 value;
1201
1202 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1203 goto nla_put_failure;
1204 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1205 if (!cee)
1206 goto nla_put_failure;
1207
1208 /* local pg */
1209 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1210 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1211 if (err)
1212 goto nla_put_failure;
1213 }
1214
1215 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1216 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1217 if (err)
1218 goto nla_put_failure;
1219 }
1220
1221 /* local pfc */
1222 if (ops->getpfccfg) {
1223 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1224
1225 if (!pfc_nest)
1226 goto nla_put_failure;
1227
1228 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1229 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1230 if (nla_put_u8(skb, i, value))
1231 goto nla_put_failure;
1232 }
1233 nla_nest_end(skb, pfc_nest);
1234 }
1235
1236 /* local app */
1237 spin_lock(&dcb_lock);
1238 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1239 if (!app)
1240 goto dcb_unlock;
1241
1242 list_for_each_entry(itr, &dcb_app_list, list) {
1243 if (itr->ifindex == netdev->ifindex) {
1244 struct nlattr *app_nest = nla_nest_start(skb,
1245 DCB_ATTR_APP);
1246 if (!app_nest)
1247 goto dcb_unlock;
1248
1249 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1250 itr->app.selector);
1251 if (err)
1252 goto dcb_unlock;
1253
1254 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1255 itr->app.protocol);
1256 if (err)
1257 goto dcb_unlock;
1258
1259 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1260 itr->app.priority);
1261 if (err)
1262 goto dcb_unlock;
1263
1264 nla_nest_end(skb, app_nest);
1265 }
1266 }
1267 nla_nest_end(skb, app);
1268
1269 if (netdev->dcbnl_ops->getdcbx)
1270 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1271 else
1272 dcbx = -EOPNOTSUPP;
1273
1274 spin_unlock(&dcb_lock);
1275
1276 /* features flags */
1277 if (ops->getfeatcfg) {
1278 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1279 if (!feat)
1280 goto nla_put_failure;
1281
1282 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1283 i++)
1284 if (!ops->getfeatcfg(netdev, i, &value) &&
1285 nla_put_u8(skb, i, value))
1286 goto nla_put_failure;
1287
1288 nla_nest_end(skb, feat);
1289 }
1290
1291 /* peer info if available */
1292 if (ops->cee_peer_getpg) {
1293 struct cee_pg pg;
1294 memset(&pg, 0, sizeof(pg));
1295 err = ops->cee_peer_getpg(netdev, &pg);
1296 if (!err &&
1297 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1298 goto nla_put_failure;
1299 }
1300
1301 if (ops->cee_peer_getpfc) {
1302 struct cee_pfc pfc;
1303 memset(&pfc, 0, sizeof(pfc));
1304 err = ops->cee_peer_getpfc(netdev, &pfc);
1305 if (!err &&
1306 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1307 goto nla_put_failure;
1308 }
1309
1310 if (ops->peer_getappinfo && ops->peer_getapptable) {
1311 err = dcbnl_build_peer_app(netdev, skb,
1312 DCB_ATTR_CEE_PEER_APP_TABLE,
1313 DCB_ATTR_CEE_PEER_APP_INFO,
1314 DCB_ATTR_CEE_PEER_APP);
1315 if (err)
1316 goto nla_put_failure;
1317 }
1318 nla_nest_end(skb, cee);
1319
1320 /* DCBX state */
1321 if (dcbx >= 0) {
1322 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1323 if (err)
1324 goto nla_put_failure;
1325 }
1326 return 0;
1327
1328 dcb_unlock:
1329 spin_unlock(&dcb_lock);
1330 nla_put_failure:
1331 return err;
1332 }
1333
1334 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1335 u32 seq, u32 portid, int dcbx_ver)
1336 {
1337 struct net *net = dev_net(dev);
1338 struct sk_buff *skb;
1339 struct nlmsghdr *nlh;
1340 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1341 int err;
1342
1343 if (!ops)
1344 return -EOPNOTSUPP;
1345
1346 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1347 if (!skb)
1348 return -ENOBUFS;
1349
1350 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1351 err = dcbnl_ieee_fill(skb, dev);
1352 else
1353 err = dcbnl_cee_fill(skb, dev);
1354
1355 if (err < 0) {
1356 /* Report error to broadcast listeners */
1357 nlmsg_free(skb);
1358 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1359 } else {
1360 /* End nlmsg and notify broadcast listeners */
1361 nlmsg_end(skb, nlh);
1362 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1363 }
1364
1365 return err;
1366 }
1367
1368 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1369 u32 seq, u32 portid)
1370 {
1371 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1372 }
1373 EXPORT_SYMBOL(dcbnl_ieee_notify);
1374
1375 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1376 u32 seq, u32 portid)
1377 {
1378 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1379 }
1380 EXPORT_SYMBOL(dcbnl_cee_notify);
1381
1382 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1383 * be completed the entire msg is aborted and error value is returned.
1384 * No attempt is made to reconcile the case where only part of the
1385 * cmd can be completed.
1386 */
1387 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1388 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1389 {
1390 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1391 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1392 int err;
1393
1394 if (!ops)
1395 return -EOPNOTSUPP;
1396
1397 if (!tb[DCB_ATTR_IEEE])
1398 return -EINVAL;
1399
1400 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1401 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1402 if (err)
1403 return err;
1404
1405 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1406 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1407 err = ops->ieee_setets(netdev, ets);
1408 if (err)
1409 goto err;
1410 }
1411
1412 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1413 struct ieee_maxrate *maxrate =
1414 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1415 err = ops->ieee_setmaxrate(netdev, maxrate);
1416 if (err)
1417 goto err;
1418 }
1419
1420 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1421 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1422 err = ops->ieee_setpfc(netdev, pfc);
1423 if (err)
1424 goto err;
1425 }
1426
1427 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1428 struct nlattr *attr;
1429 int rem;
1430
1431 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1432 struct dcb_app *app_data;
1433 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1434 continue;
1435 app_data = nla_data(attr);
1436 if (ops->ieee_setapp)
1437 err = ops->ieee_setapp(netdev, app_data);
1438 else
1439 err = dcb_ieee_setapp(netdev, app_data);
1440 if (err)
1441 goto err;
1442 }
1443 }
1444
1445 err:
1446 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1447 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1448 return err;
1449 }
1450
1451 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1452 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1453 {
1454 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1455
1456 if (!ops)
1457 return -EOPNOTSUPP;
1458
1459 return dcbnl_ieee_fill(skb, netdev);
1460 }
1461
1462 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1463 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1464 {
1465 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1466 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1467 int err;
1468
1469 if (!ops)
1470 return -EOPNOTSUPP;
1471
1472 if (!tb[DCB_ATTR_IEEE])
1473 return -EINVAL;
1474
1475 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1476 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1477 if (err)
1478 return err;
1479
1480 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1481 struct nlattr *attr;
1482 int rem;
1483
1484 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1485 struct dcb_app *app_data;
1486
1487 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1488 continue;
1489 app_data = nla_data(attr);
1490 if (ops->ieee_delapp)
1491 err = ops->ieee_delapp(netdev, app_data);
1492 else
1493 err = dcb_ieee_delapp(netdev, app_data);
1494 if (err)
1495 goto err;
1496 }
1497 }
1498
1499 err:
1500 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1501 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1502 return err;
1503 }
1504
1505
1506 /* DCBX configuration */
1507 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1508 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1509 {
1510 if (!netdev->dcbnl_ops->getdcbx)
1511 return -EOPNOTSUPP;
1512
1513 return nla_put_u8(skb, DCB_ATTR_DCBX,
1514 netdev->dcbnl_ops->getdcbx(netdev));
1515 }
1516
1517 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1518 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1519 {
1520 u8 value;
1521
1522 if (!netdev->dcbnl_ops->setdcbx)
1523 return -EOPNOTSUPP;
1524
1525 if (!tb[DCB_ATTR_DCBX])
1526 return -EINVAL;
1527
1528 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1529
1530 return nla_put_u8(skb, DCB_ATTR_DCBX,
1531 netdev->dcbnl_ops->setdcbx(netdev, value));
1532 }
1533
1534 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1535 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1536 {
1537 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1538 u8 value;
1539 int ret, i;
1540 int getall = 0;
1541
1542 if (!netdev->dcbnl_ops->getfeatcfg)
1543 return -EOPNOTSUPP;
1544
1545 if (!tb[DCB_ATTR_FEATCFG])
1546 return -EINVAL;
1547
1548 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1549 dcbnl_featcfg_nest);
1550 if (ret)
1551 return ret;
1552
1553 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1554 if (!nest)
1555 return -EMSGSIZE;
1556
1557 if (data[DCB_FEATCFG_ATTR_ALL])
1558 getall = 1;
1559
1560 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1561 if (!getall && !data[i])
1562 continue;
1563
1564 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1565 if (!ret)
1566 ret = nla_put_u8(skb, i, value);
1567
1568 if (ret) {
1569 nla_nest_cancel(skb, nest);
1570 goto nla_put_failure;
1571 }
1572 }
1573 nla_nest_end(skb, nest);
1574
1575 nla_put_failure:
1576 return ret;
1577 }
1578
1579 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1580 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1581 {
1582 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1583 int ret, i;
1584 u8 value;
1585
1586 if (!netdev->dcbnl_ops->setfeatcfg)
1587 return -ENOTSUPP;
1588
1589 if (!tb[DCB_ATTR_FEATCFG])
1590 return -EINVAL;
1591
1592 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1593 dcbnl_featcfg_nest);
1594
1595 if (ret)
1596 goto err;
1597
1598 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1599 if (data[i] == NULL)
1600 continue;
1601
1602 value = nla_get_u8(data[i]);
1603
1604 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1605
1606 if (ret)
1607 goto err;
1608 }
1609 err:
1610 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1611
1612 return ret;
1613 }
1614
1615 /* Handle CEE DCBX GET commands. */
1616 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1617 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1618 {
1619 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1620
1621 if (!ops)
1622 return -EOPNOTSUPP;
1623
1624 return dcbnl_cee_fill(skb, netdev);
1625 }
1626
1627 struct reply_func {
1628 /* reply netlink message type */
1629 int type;
1630
1631 /* function to fill message contents */
1632 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1633 struct nlattr **, struct sk_buff *);
1634 };
1635
1636 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1637 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1638 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1639 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1640 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1641 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1642 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1643 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1644 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1645 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1646 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1647 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1648 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1649 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1650 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1651 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1652 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1653 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1654 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1655 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1656 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1657 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1658 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1659 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1660 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1661 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1662 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1663 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
1664 };
1665
1666 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
1667 {
1668 struct net *net = sock_net(skb->sk);
1669 struct net_device *netdev;
1670 struct dcbmsg *dcb = nlmsg_data(nlh);
1671 struct nlattr *tb[DCB_ATTR_MAX + 1];
1672 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1673 int ret = -EINVAL;
1674 struct sk_buff *reply_skb;
1675 struct nlmsghdr *reply_nlh = NULL;
1676 const struct reply_func *fn;
1677
1678 if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
1679 return -EPERM;
1680
1681 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1682 dcbnl_rtnl_policy);
1683 if (ret < 0)
1684 return ret;
1685
1686 if (dcb->cmd > DCB_CMD_MAX)
1687 return -EINVAL;
1688
1689 /* check if a reply function has been defined for the command */
1690 fn = &reply_funcs[dcb->cmd];
1691 if (!fn->cb)
1692 return -EOPNOTSUPP;
1693
1694 if (!tb[DCB_ATTR_IFNAME])
1695 return -EINVAL;
1696
1697 netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1698 if (!netdev)
1699 return -ENODEV;
1700
1701 if (!netdev->dcbnl_ops)
1702 return -EOPNOTSUPP;
1703
1704 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1705 nlh->nlmsg_flags, &reply_nlh);
1706 if (!reply_skb)
1707 return -ENOBUFS;
1708
1709 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1710 if (ret < 0) {
1711 nlmsg_free(reply_skb);
1712 goto out;
1713 }
1714
1715 nlmsg_end(reply_skb, reply_nlh);
1716
1717 ret = rtnl_unicast(reply_skb, net, portid);
1718 out:
1719 return ret;
1720 }
1721
1722 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1723 int ifindex, int prio)
1724 {
1725 struct dcb_app_type *itr;
1726
1727 list_for_each_entry(itr, &dcb_app_list, list) {
1728 if (itr->app.selector == app->selector &&
1729 itr->app.protocol == app->protocol &&
1730 itr->ifindex == ifindex &&
1731 (!prio || itr->app.priority == prio))
1732 return itr;
1733 }
1734
1735 return NULL;
1736 }
1737
1738 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1739 {
1740 struct dcb_app_type *entry;
1741
1742 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1743 if (!entry)
1744 return -ENOMEM;
1745
1746 memcpy(&entry->app, app, sizeof(*app));
1747 entry->ifindex = ifindex;
1748 list_add(&entry->list, &dcb_app_list);
1749
1750 return 0;
1751 }
1752
1753 /**
1754 * dcb_getapp - retrieve the DCBX application user priority
1755 *
1756 * On success returns a non-zero 802.1p user priority bitmap
1757 * otherwise returns 0 as the invalid user priority bitmap to
1758 * indicate an error.
1759 */
1760 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1761 {
1762 struct dcb_app_type *itr;
1763 u8 prio = 0;
1764
1765 spin_lock(&dcb_lock);
1766 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1767 prio = itr->app.priority;
1768 spin_unlock(&dcb_lock);
1769
1770 return prio;
1771 }
1772 EXPORT_SYMBOL(dcb_getapp);
1773
1774 /**
1775 * dcb_setapp - add CEE dcb application data to app list
1776 *
1777 * Priority 0 is an invalid priority in CEE spec. This routine
1778 * removes applications from the app list if the priority is
1779 * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap
1780 */
1781 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1782 {
1783 struct dcb_app_type *itr;
1784 struct dcb_app_type event;
1785 int err = 0;
1786
1787 event.ifindex = dev->ifindex;
1788 memcpy(&event.app, new, sizeof(event.app));
1789 if (dev->dcbnl_ops->getdcbx)
1790 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1791
1792 spin_lock(&dcb_lock);
1793 /* Search for existing match and replace */
1794 if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1795 if (new->priority)
1796 itr->app.priority = new->priority;
1797 else {
1798 list_del(&itr->list);
1799 kfree(itr);
1800 }
1801 goto out;
1802 }
1803 /* App type does not exist add new application type */
1804 if (new->priority)
1805 err = dcb_app_add(new, dev->ifindex);
1806 out:
1807 spin_unlock(&dcb_lock);
1808 if (!err)
1809 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1810 return err;
1811 }
1812 EXPORT_SYMBOL(dcb_setapp);
1813
1814 /**
1815 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1816 *
1817 * Helper routine which on success returns a non-zero 802.1Qaz user
1818 * priority bitmap otherwise returns 0 to indicate the dcb_app was
1819 * not found in APP list.
1820 */
1821 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1822 {
1823 struct dcb_app_type *itr;
1824 u8 prio = 0;
1825
1826 spin_lock(&dcb_lock);
1827 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1828 prio |= 1 << itr->app.priority;
1829 spin_unlock(&dcb_lock);
1830
1831 return prio;
1832 }
1833 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1834
1835 /**
1836 * dcb_ieee_setapp - add IEEE dcb application data to app list
1837 *
1838 * This adds Application data to the list. Multiple application
1839 * entries may exists for the same selector and protocol as long
1840 * as the priorities are different. Priority is expected to be a
1841 * 3-bit unsigned integer
1842 */
1843 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1844 {
1845 struct dcb_app_type event;
1846 int err = 0;
1847
1848 event.ifindex = dev->ifindex;
1849 memcpy(&event.app, new, sizeof(event.app));
1850 if (dev->dcbnl_ops->getdcbx)
1851 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1852
1853 spin_lock(&dcb_lock);
1854 /* Search for existing match and abort if found */
1855 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1856 err = -EEXIST;
1857 goto out;
1858 }
1859
1860 err = dcb_app_add(new, dev->ifindex);
1861 out:
1862 spin_unlock(&dcb_lock);
1863 if (!err)
1864 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1865 return err;
1866 }
1867 EXPORT_SYMBOL(dcb_ieee_setapp);
1868
1869 /**
1870 * dcb_ieee_delapp - delete IEEE dcb application data from list
1871 *
1872 * This removes a matching APP data from the APP list
1873 */
1874 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1875 {
1876 struct dcb_app_type *itr;
1877 struct dcb_app_type event;
1878 int err = -ENOENT;
1879
1880 event.ifindex = dev->ifindex;
1881 memcpy(&event.app, del, sizeof(event.app));
1882 if (dev->dcbnl_ops->getdcbx)
1883 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1884
1885 spin_lock(&dcb_lock);
1886 /* Search for existing match and remove it. */
1887 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1888 list_del(&itr->list);
1889 kfree(itr);
1890 err = 0;
1891 }
1892
1893 spin_unlock(&dcb_lock);
1894 if (!err)
1895 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1896 return err;
1897 }
1898 EXPORT_SYMBOL(dcb_ieee_delapp);
1899
1900 static void dcb_flushapp(void)
1901 {
1902 struct dcb_app_type *app;
1903 struct dcb_app_type *tmp;
1904
1905 spin_lock(&dcb_lock);
1906 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1907 list_del(&app->list);
1908 kfree(app);
1909 }
1910 spin_unlock(&dcb_lock);
1911 }
1912
1913 static int __init dcbnl_init(void)
1914 {
1915 INIT_LIST_HEAD(&dcb_app_list);
1916
1917 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1918 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1919
1920 return 0;
1921 }
1922 module_init(dcbnl_init);
1923
1924 static void __exit dcbnl_exit(void)
1925 {
1926 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1927 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1928 dcb_flushapp();
1929 }
1930 module_exit(dcbnl_exit);
Linux with added FPC-III support