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Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
[linux-2.6.git] / net / dcb / dcbnl.c
blob40d5829ed36aaa6945c9c4c2056325b68ab64c03
1 /*
2 * Copyright (c) 2008-2011, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
16 *
17 * Author: Lucy Liu <lucy.liu@intel.com>
18 */
19
20 #include <linux/netdevice.h>
21 #include <linux/netlink.h>
22 #include <linux/slab.h>
23 #include <net/netlink.h>
24 #include <net/rtnetlink.h>
25 #include <linux/dcbnl.h>
26 #include <net/dcbevent.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/module.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 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
53 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
54 MODULE_LICENSE("GPL");
55
56 /**************** DCB attribute policies *************************************/
57
58 /* DCB netlink attributes policy */
59 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
60 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
61 [DCB_ATTR_STATE] = {.type = NLA_U8},
62 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
63 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
64 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
65 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
66 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
67 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
68 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
69 [DCB_ATTR_APP] = {.type = NLA_NESTED},
70 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
71 [DCB_ATTR_DCBX] = {.type = NLA_U8},
72 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
73 };
74
75 /* DCB priority flow control to User Priority nested attributes */
76 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
77 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
85 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
86 };
87
88 /* DCB priority grouping nested attributes */
89 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
90 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
99 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
107 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
108 };
109
110 /* DCB traffic class nested attributes. */
111 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
112 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
113 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
116 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
117 };
118
119 /* DCB capabilities nested attributes. */
120 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
121 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
122 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
123 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
129 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
130 };
131
132 /* DCB capabilities nested attributes. */
133 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
134 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
135 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
136 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
137 };
138
139 /* DCB BCN nested attributes. */
140 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
141 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
149 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
150 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
165 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
166 };
167
168 /* DCB APP nested attributes. */
169 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
170 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
171 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
172 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
173 };
174
175 /* IEEE 802.1Qaz nested attributes. */
176 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
177 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
178 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
179 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
180 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
181 };
182
183 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
184 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
185 };
186
187 /* DCB number of traffic classes nested attributes. */
188 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
189 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
190 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
191 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
192 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
193 };
194
195 static LIST_HEAD(dcb_app_list);
196 static DEFINE_SPINLOCK(dcb_lock);
197
198 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
199 u32 flags, struct nlmsghdr **nlhp)
200 {
201 struct sk_buff *skb;
202 struct dcbmsg *dcb;
203 struct nlmsghdr *nlh;
204
205 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
206 if (!skb)
207 return NULL;
208
209 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
210 BUG_ON(!nlh);
211
212 dcb = nlmsg_data(nlh);
213 dcb->dcb_family = AF_UNSPEC;
214 dcb->cmd = cmd;
215 dcb->dcb_pad = 0;
216
217 if (nlhp)
218 *nlhp = nlh;
219
220 return skb;
221 }
222
223 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
224 u32 seq, struct nlattr **tb, struct sk_buff *skb)
225 {
226 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
227 if (!netdev->dcbnl_ops->getstate)
228 return -EOPNOTSUPP;
229
230 return nla_put_u8(skb, DCB_ATTR_STATE,
231 netdev->dcbnl_ops->getstate(netdev));
232 }
233
234 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
235 u32 seq, struct nlattr **tb, struct sk_buff *skb)
236 {
237 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
238 u8 value;
239 int ret;
240 int i;
241 int getall = 0;
242
243 if (!tb[DCB_ATTR_PFC_CFG])
244 return -EINVAL;
245
246 if (!netdev->dcbnl_ops->getpfccfg)
247 return -EOPNOTSUPP;
248
249 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
250 tb[DCB_ATTR_PFC_CFG],
251 dcbnl_pfc_up_nest);
252 if (ret)
253 return ret;
254
255 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
256 if (!nest)
257 return -EMSGSIZE;
258
259 if (data[DCB_PFC_UP_ATTR_ALL])
260 getall = 1;
261
262 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
263 if (!getall && !data[i])
264 continue;
265
266 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
267 &value);
268 ret = nla_put_u8(skb, i, value);
269 if (ret) {
270 nla_nest_cancel(skb, nest);
271 return ret;
272 }
273 }
274 nla_nest_end(skb, nest);
275
276 return 0;
277 }
278
279 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
280 u32 seq, struct nlattr **tb, struct sk_buff *skb)
281 {
282 u8 perm_addr[MAX_ADDR_LEN];
283
284 if (!netdev->dcbnl_ops->getpermhwaddr)
285 return -EOPNOTSUPP;
286
287 memset(perm_addr, 0, sizeof(perm_addr));
288 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
289
290 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
291 }
292
293 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
294 u32 seq, struct nlattr **tb, struct sk_buff *skb)
295 {
296 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
297 u8 value;
298 int ret;
299 int i;
300 int getall = 0;
301
302 if (!tb[DCB_ATTR_CAP])
303 return -EINVAL;
304
305 if (!netdev->dcbnl_ops->getcap)
306 return -EOPNOTSUPP;
307
308 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
309 dcbnl_cap_nest);
310 if (ret)
311 return ret;
312
313 nest = nla_nest_start(skb, DCB_ATTR_CAP);
314 if (!nest)
315 return -EMSGSIZE;
316
317 if (data[DCB_CAP_ATTR_ALL])
318 getall = 1;
319
320 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
321 if (!getall && !data[i])
322 continue;
323
324 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
325 ret = nla_put_u8(skb, i, value);
326 if (ret) {
327 nla_nest_cancel(skb, nest);
328 return ret;
329 }
330 }
331 }
332 nla_nest_end(skb, nest);
333
334 return 0;
335 }
336
337 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
338 u32 seq, struct nlattr **tb, struct sk_buff *skb)
339 {
340 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
341 u8 value;
342 int ret;
343 int i;
344 int getall = 0;
345
346 if (!tb[DCB_ATTR_NUMTCS])
347 return -EINVAL;
348
349 if (!netdev->dcbnl_ops->getnumtcs)
350 return -EOPNOTSUPP;
351
352 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
353 dcbnl_numtcs_nest);
354 if (ret)
355 return ret;
356
357 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
358 if (!nest)
359 return -EMSGSIZE;
360
361 if (data[DCB_NUMTCS_ATTR_ALL])
362 getall = 1;
363
364 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
365 if (!getall && !data[i])
366 continue;
367
368 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
369 if (!ret) {
370 ret = nla_put_u8(skb, i, value);
371 if (ret) {
372 nla_nest_cancel(skb, nest);
373 return ret;
374 }
375 } else
376 return -EINVAL;
377 }
378 nla_nest_end(skb, nest);
379
380 return 0;
381 }
382
383 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
384 u32 seq, struct nlattr **tb, struct sk_buff *skb)
385 {
386 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
387 int ret;
388 u8 value;
389 int i;
390
391 if (!tb[DCB_ATTR_NUMTCS])
392 return -EINVAL;
393
394 if (!netdev->dcbnl_ops->setnumtcs)
395 return -EOPNOTSUPP;
396
397 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
398 dcbnl_numtcs_nest);
399 if (ret)
400 return ret;
401
402 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
403 if (data[i] == NULL)
404 continue;
405
406 value = nla_get_u8(data[i]);
407
408 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
409 if (ret)
410 break;
411 }
412
413 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
414 }
415
416 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
417 u32 seq, struct nlattr **tb, struct sk_buff *skb)
418 {
419 if (!netdev->dcbnl_ops->getpfcstate)
420 return -EOPNOTSUPP;
421
422 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
423 netdev->dcbnl_ops->getpfcstate(netdev));
424 }
425
426 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
427 u32 seq, struct nlattr **tb, struct sk_buff *skb)
428 {
429 u8 value;
430
431 if (!tb[DCB_ATTR_PFC_STATE])
432 return -EINVAL;
433
434 if (!netdev->dcbnl_ops->setpfcstate)
435 return -EOPNOTSUPP;
436
437 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
438
439 netdev->dcbnl_ops->setpfcstate(netdev, value);
440
441 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
442 }
443
444 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
445 u32 seq, struct nlattr **tb, struct sk_buff *skb)
446 {
447 struct nlattr *app_nest;
448 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
449 u16 id;
450 u8 up, idtype;
451 int ret;
452
453 if (!tb[DCB_ATTR_APP])
454 return -EINVAL;
455
456 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
457 dcbnl_app_nest);
458 if (ret)
459 return ret;
460
461 /* all must be non-null */
462 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
463 (!app_tb[DCB_APP_ATTR_ID]))
464 return -EINVAL;
465
466 /* either by eth type or by socket number */
467 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
468 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
469 (idtype != DCB_APP_IDTYPE_PORTNUM))
470 return -EINVAL;
471
472 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
473
474 if (netdev->dcbnl_ops->getapp) {
475 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
476 } else {
477 struct dcb_app app = {
478 .selector = idtype,
479 .protocol = id,
480 };
481 up = dcb_getapp(netdev, &app);
482 }
483
484 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
485 if (!app_nest)
486 return -EMSGSIZE;
487
488 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
489 if (ret)
490 goto out_cancel;
491
492 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
493 if (ret)
494 goto out_cancel;
495
496 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
497 if (ret)
498 goto out_cancel;
499
500 nla_nest_end(skb, app_nest);
501
502 return 0;
503
504 out_cancel:
505 nla_nest_cancel(skb, app_nest);
506 return ret;
507 }
508
509 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
510 u32 seq, struct nlattr **tb, struct sk_buff *skb)
511 {
512 int ret;
513 u16 id;
514 u8 up, idtype;
515 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
516
517 if (!tb[DCB_ATTR_APP])
518 return -EINVAL;
519
520 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
521 dcbnl_app_nest);
522 if (ret)
523 return ret;
524
525 /* all must be non-null */
526 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
527 (!app_tb[DCB_APP_ATTR_ID]) ||
528 (!app_tb[DCB_APP_ATTR_PRIORITY]))
529 return -EINVAL;
530
531 /* either by eth type or by socket number */
532 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
533 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
534 (idtype != DCB_APP_IDTYPE_PORTNUM))
535 return -EINVAL;
536
537 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
538 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
539
540 if (netdev->dcbnl_ops->setapp) {
541 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
542 } else {
543 struct dcb_app app;
544 app.selector = idtype;
545 app.protocol = id;
546 app.priority = up;
547 ret = dcb_setapp(netdev, &app);
548 }
549
550 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
551 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
552
553 return ret;
554 }
555
556 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
557 struct nlattr **tb, struct sk_buff *skb, int dir)
558 {
559 struct nlattr *pg_nest, *param_nest, *data;
560 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
561 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
562 u8 prio, pgid, tc_pct, up_map;
563 int ret;
564 int getall = 0;
565 int i;
566
567 if (!tb[DCB_ATTR_PG_CFG])
568 return -EINVAL;
569
570 if (!netdev->dcbnl_ops->getpgtccfgtx ||
571 !netdev->dcbnl_ops->getpgtccfgrx ||
572 !netdev->dcbnl_ops->getpgbwgcfgtx ||
573 !netdev->dcbnl_ops->getpgbwgcfgrx)
574 return -EOPNOTSUPP;
575
576 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
577 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
578 if (ret)
579 return ret;
580
581 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
582 if (!pg_nest)
583 return -EMSGSIZE;
584
585 if (pg_tb[DCB_PG_ATTR_TC_ALL])
586 getall = 1;
587
588 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
589 if (!getall && !pg_tb[i])
590 continue;
591
592 if (pg_tb[DCB_PG_ATTR_TC_ALL])
593 data = pg_tb[DCB_PG_ATTR_TC_ALL];
594 else
595 data = pg_tb[i];
596 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
597 data, dcbnl_tc_param_nest);
598 if (ret)
599 goto err_pg;
600
601 param_nest = nla_nest_start(skb, i);
602 if (!param_nest)
603 goto err_pg;
604
605 pgid = DCB_ATTR_VALUE_UNDEFINED;
606 prio = DCB_ATTR_VALUE_UNDEFINED;
607 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
608 up_map = DCB_ATTR_VALUE_UNDEFINED;
609
610 if (dir) {
611 /* Rx */
612 netdev->dcbnl_ops->getpgtccfgrx(netdev,
613 i - DCB_PG_ATTR_TC_0, &prio,
614 &pgid, &tc_pct, &up_map);
615 } else {
616 /* Tx */
617 netdev->dcbnl_ops->getpgtccfgtx(netdev,
618 i - DCB_PG_ATTR_TC_0, &prio,
619 &pgid, &tc_pct, &up_map);
620 }
621
622 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
623 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
624 ret = nla_put_u8(skb,
625 DCB_TC_ATTR_PARAM_PGID, pgid);
626 if (ret)
627 goto err_param;
628 }
629 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
630 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
631 ret = nla_put_u8(skb,
632 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
633 if (ret)
634 goto err_param;
635 }
636 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
637 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
638 ret = nla_put_u8(skb,
639 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
640 if (ret)
641 goto err_param;
642 }
643 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
644 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
645 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
646 tc_pct);
647 if (ret)
648 goto err_param;
649 }
650 nla_nest_end(skb, param_nest);
651 }
652
653 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
654 getall = 1;
655 else
656 getall = 0;
657
658 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
659 if (!getall && !pg_tb[i])
660 continue;
661
662 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
663
664 if (dir) {
665 /* Rx */
666 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
667 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
668 } else {
669 /* Tx */
670 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
671 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
672 }
673 ret = nla_put_u8(skb, i, tc_pct);
674 if (ret)
675 goto err_pg;
676 }
677
678 nla_nest_end(skb, pg_nest);
679
680 return 0;
681
682 err_param:
683 nla_nest_cancel(skb, param_nest);
684 err_pg:
685 nla_nest_cancel(skb, pg_nest);
686
687 return -EMSGSIZE;
688 }
689
690 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
691 u32 seq, struct nlattr **tb, struct sk_buff *skb)
692 {
693 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
694 }
695
696 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
697 u32 seq, struct nlattr **tb, struct sk_buff *skb)
698 {
699 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
700 }
701
702 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
703 u32 seq, struct nlattr **tb, struct sk_buff *skb)
704 {
705 u8 value;
706
707 if (!tb[DCB_ATTR_STATE])
708 return -EINVAL;
709
710 if (!netdev->dcbnl_ops->setstate)
711 return -EOPNOTSUPP;
712
713 value = nla_get_u8(tb[DCB_ATTR_STATE]);
714
715 return nla_put_u8(skb, DCB_ATTR_STATE,
716 netdev->dcbnl_ops->setstate(netdev, value));
717 }
718
719 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
720 u32 seq, struct nlattr **tb, struct sk_buff *skb)
721 {
722 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
723 int i;
724 int ret;
725 u8 value;
726
727 if (!tb[DCB_ATTR_PFC_CFG])
728 return -EINVAL;
729
730 if (!netdev->dcbnl_ops->setpfccfg)
731 return -EOPNOTSUPP;
732
733 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
734 tb[DCB_ATTR_PFC_CFG],
735 dcbnl_pfc_up_nest);
736 if (ret)
737 return ret;
738
739 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
740 if (data[i] == NULL)
741 continue;
742 value = nla_get_u8(data[i]);
743 netdev->dcbnl_ops->setpfccfg(netdev,
744 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
745 }
746
747 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
748 }
749
750 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
751 u32 seq, struct nlattr **tb, struct sk_buff *skb)
752 {
753 int ret;
754
755 if (!tb[DCB_ATTR_SET_ALL])
756 return -EINVAL;
757
758 if (!netdev->dcbnl_ops->setall)
759 return -EOPNOTSUPP;
760
761 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
762 netdev->dcbnl_ops->setall(netdev));
763 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
764
765 return ret;
766 }
767
768 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
769 u32 seq, struct nlattr **tb, struct sk_buff *skb,
770 int dir)
771 {
772 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
773 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
774 int ret;
775 int i;
776 u8 pgid;
777 u8 up_map;
778 u8 prio;
779 u8 tc_pct;
780
781 if (!tb[DCB_ATTR_PG_CFG])
782 return -EINVAL;
783
784 if (!netdev->dcbnl_ops->setpgtccfgtx ||
785 !netdev->dcbnl_ops->setpgtccfgrx ||
786 !netdev->dcbnl_ops->setpgbwgcfgtx ||
787 !netdev->dcbnl_ops->setpgbwgcfgrx)
788 return -EOPNOTSUPP;
789
790 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
791 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
792 if (ret)
793 return ret;
794
795 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
796 if (!pg_tb[i])
797 continue;
798
799 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
800 pg_tb[i], dcbnl_tc_param_nest);
801 if (ret)
802 return ret;
803
804 pgid = DCB_ATTR_VALUE_UNDEFINED;
805 prio = DCB_ATTR_VALUE_UNDEFINED;
806 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
807 up_map = DCB_ATTR_VALUE_UNDEFINED;
808
809 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
810 prio =
811 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
812
813 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
814 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
815
816 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
817 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
818
819 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
820 up_map =
821 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
822
823 /* dir: Tx = 0, Rx = 1 */
824 if (dir) {
825 /* Rx */
826 netdev->dcbnl_ops->setpgtccfgrx(netdev,
827 i - DCB_PG_ATTR_TC_0,
828 prio, pgid, tc_pct, up_map);
829 } else {
830 /* Tx */
831 netdev->dcbnl_ops->setpgtccfgtx(netdev,
832 i - DCB_PG_ATTR_TC_0,
833 prio, pgid, tc_pct, up_map);
834 }
835 }
836
837 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
838 if (!pg_tb[i])
839 continue;
840
841 tc_pct = nla_get_u8(pg_tb[i]);
842
843 /* dir: Tx = 0, Rx = 1 */
844 if (dir) {
845 /* Rx */
846 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
847 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
848 } else {
849 /* Tx */
850 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
851 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
852 }
853 }
854
855 return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
856 }
857
858 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
859 u32 seq, struct nlattr **tb, struct sk_buff *skb)
860 {
861 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
862 }
863
864 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
865 u32 seq, struct nlattr **tb, struct sk_buff *skb)
866 {
867 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
868 }
869
870 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
871 u32 seq, struct nlattr **tb, struct sk_buff *skb)
872 {
873 struct nlattr *bcn_nest;
874 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
875 u8 value_byte;
876 u32 value_integer;
877 int ret;
878 bool getall = false;
879 int i;
880
881 if (!tb[DCB_ATTR_BCN])
882 return -EINVAL;
883
884 if (!netdev->dcbnl_ops->getbcnrp ||
885 !netdev->dcbnl_ops->getbcncfg)
886 return -EOPNOTSUPP;
887
888 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
889 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
890 if (ret)
891 return ret;
892
893 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
894 if (!bcn_nest)
895 return -EMSGSIZE;
896
897 if (bcn_tb[DCB_BCN_ATTR_ALL])
898 getall = true;
899
900 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
901 if (!getall && !bcn_tb[i])
902 continue;
903
904 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
905 &value_byte);
906 ret = nla_put_u8(skb, i, value_byte);
907 if (ret)
908 goto err_bcn;
909 }
910
911 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
912 if (!getall && !bcn_tb[i])
913 continue;
914
915 netdev->dcbnl_ops->getbcncfg(netdev, i,
916 &value_integer);
917 ret = nla_put_u32(skb, i, value_integer);
918 if (ret)
919 goto err_bcn;
920 }
921
922 nla_nest_end(skb, bcn_nest);
923
924 return 0;
925
926 err_bcn:
927 nla_nest_cancel(skb, bcn_nest);
928 return ret;
929 }
930
931 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
932 u32 seq, struct nlattr **tb, struct sk_buff *skb)
933 {
934 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
935 int i;
936 int ret;
937 u8 value_byte;
938 u32 value_int;
939
940 if (!tb[DCB_ATTR_BCN])
941 return -EINVAL;
942
943 if (!netdev->dcbnl_ops->setbcncfg ||
944 !netdev->dcbnl_ops->setbcnrp)
945 return -EOPNOTSUPP;
946
947 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
948 tb[DCB_ATTR_BCN],
949 dcbnl_pfc_up_nest);
950 if (ret)
951 return ret;
952
953 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
954 if (data[i] == NULL)
955 continue;
956 value_byte = nla_get_u8(data[i]);
957 netdev->dcbnl_ops->setbcnrp(netdev,
958 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
959 }
960
961 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
962 if (data[i] == NULL)
963 continue;
964 value_int = nla_get_u32(data[i]);
965 netdev->dcbnl_ops->setbcncfg(netdev,
966 i, value_int);
967 }
968
969 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
970 }
971
972 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
973 int app_nested_type, int app_info_type,
974 int app_entry_type)
975 {
976 struct dcb_peer_app_info info;
977 struct dcb_app *table = NULL;
978 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
979 u16 app_count;
980 int err;
981
982
983 /**
984 * retrieve the peer app configuration form the driver. If the driver
985 * handlers fail exit without doing anything
986 */
987 err = ops->peer_getappinfo(netdev, &info, &app_count);
988 if (!err && app_count) {
989 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
990 if (!table)
991 return -ENOMEM;
992
993 err = ops->peer_getapptable(netdev, table);
994 }
995
996 if (!err) {
997 u16 i;
998 struct nlattr *app;
999
1000 /**
1001 * build the message, from here on the only possible failure
1002 * is due to the skb size
1003 */
1004 err = -EMSGSIZE;
1005
1006 app = nla_nest_start(skb, app_nested_type);
1007 if (!app)
1008 goto nla_put_failure;
1009
1010 if (app_info_type &&
1011 nla_put(skb, app_info_type, sizeof(info), &info))
1012 goto nla_put_failure;
1013
1014 for (i = 0; i < app_count; i++) {
1015 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1016 &table[i]))
1017 goto nla_put_failure;
1018 }
1019 nla_nest_end(skb, app);
1020 }
1021 err = 0;
1022
1023 nla_put_failure:
1024 kfree(table);
1025 return err;
1026 }
1027
1028 /* Handle IEEE 802.1Qaz GET commands. */
1029 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1030 {
1031 struct nlattr *ieee, *app;
1032 struct dcb_app_type *itr;
1033 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1034 int dcbx;
1035 int err;
1036
1037 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1038 return -EMSGSIZE;
1039
1040 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1041 if (!ieee)
1042 return -EMSGSIZE;
1043
1044 if (ops->ieee_getets) {
1045 struct ieee_ets ets;
1046 memset(&ets, 0, sizeof(ets));
1047 err = ops->ieee_getets(netdev, &ets);
1048 if (!err &&
1049 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1050 return -EMSGSIZE;
1051 }
1052
1053 if (ops->ieee_getmaxrate) {
1054 struct ieee_maxrate maxrate;
1055 memset(&maxrate, 0, sizeof(maxrate));
1056 err = ops->ieee_getmaxrate(netdev, &maxrate);
1057 if (!err) {
1058 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1059 sizeof(maxrate), &maxrate);
1060 if (err)
1061 return -EMSGSIZE;
1062 }
1063 }
1064
1065 if (ops->ieee_getpfc) {
1066 struct ieee_pfc pfc;
1067 memset(&pfc, 0, sizeof(pfc));
1068 err = ops->ieee_getpfc(netdev, &pfc);
1069 if (!err &&
1070 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1071 return -EMSGSIZE;
1072 }
1073
1074 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1075 if (!app)
1076 return -EMSGSIZE;
1077
1078 spin_lock(&dcb_lock);
1079 list_for_each_entry(itr, &dcb_app_list, list) {
1080 if (itr->ifindex == netdev->ifindex) {
1081 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1082 &itr->app);
1083 if (err) {
1084 spin_unlock(&dcb_lock);
1085 return -EMSGSIZE;
1086 }
1087 }
1088 }
1089
1090 if (netdev->dcbnl_ops->getdcbx)
1091 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1092 else
1093 dcbx = -EOPNOTSUPP;
1094
1095 spin_unlock(&dcb_lock);
1096 nla_nest_end(skb, app);
1097
1098 /* get peer info if available */
1099 if (ops->ieee_peer_getets) {
1100 struct ieee_ets ets;
1101 memset(&ets, 0, sizeof(ets));
1102 err = ops->ieee_peer_getets(netdev, &ets);
1103 if (!err &&
1104 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1105 return -EMSGSIZE;
1106 }
1107
1108 if (ops->ieee_peer_getpfc) {
1109 struct ieee_pfc pfc;
1110 memset(&pfc, 0, sizeof(pfc));
1111 err = ops->ieee_peer_getpfc(netdev, &pfc);
1112 if (!err &&
1113 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1114 return -EMSGSIZE;
1115 }
1116
1117 if (ops->peer_getappinfo && ops->peer_getapptable) {
1118 err = dcbnl_build_peer_app(netdev, skb,
1119 DCB_ATTR_IEEE_PEER_APP,
1120 DCB_ATTR_IEEE_APP_UNSPEC,
1121 DCB_ATTR_IEEE_APP);
1122 if (err)
1123 return -EMSGSIZE;
1124 }
1125
1126 nla_nest_end(skb, ieee);
1127 if (dcbx >= 0) {
1128 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1129 if (err)
1130 return -EMSGSIZE;
1131 }
1132
1133 return 0;
1134 }
1135
1136 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1137 int dir)
1138 {
1139 u8 pgid, up_map, prio, tc_pct;
1140 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1141 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1142 struct nlattr *pg = nla_nest_start(skb, i);
1143
1144 if (!pg)
1145 return -EMSGSIZE;
1146
1147 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1148 struct nlattr *tc_nest = nla_nest_start(skb, i);
1149
1150 if (!tc_nest)
1151 return -EMSGSIZE;
1152
1153 pgid = DCB_ATTR_VALUE_UNDEFINED;
1154 prio = DCB_ATTR_VALUE_UNDEFINED;
1155 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1156 up_map = DCB_ATTR_VALUE_UNDEFINED;
1157
1158 if (!dir)
1159 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1160 &prio, &pgid, &tc_pct, &up_map);
1161 else
1162 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1163 &prio, &pgid, &tc_pct, &up_map);
1164
1165 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1166 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1167 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1168 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1169 return -EMSGSIZE;
1170 nla_nest_end(skb, tc_nest);
1171 }
1172
1173 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1174 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1175
1176 if (!dir)
1177 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1178 &tc_pct);
1179 else
1180 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1181 &tc_pct);
1182 if (nla_put_u8(skb, i, tc_pct))
1183 return -EMSGSIZE;
1184 }
1185 nla_nest_end(skb, pg);
1186 return 0;
1187 }
1188
1189 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1190 {
1191 struct nlattr *cee, *app;
1192 struct dcb_app_type *itr;
1193 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1194 int dcbx, i, err = -EMSGSIZE;
1195 u8 value;
1196
1197 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1198 goto nla_put_failure;
1199 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1200 if (!cee)
1201 goto nla_put_failure;
1202
1203 /* local pg */
1204 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1205 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1206 if (err)
1207 goto nla_put_failure;
1208 }
1209
1210 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1211 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1212 if (err)
1213 goto nla_put_failure;
1214 }
1215
1216 /* local pfc */
1217 if (ops->getpfccfg) {
1218 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1219
1220 if (!pfc_nest)
1221 goto nla_put_failure;
1222
1223 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1224 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1225 if (nla_put_u8(skb, i, value))
1226 goto nla_put_failure;
1227 }
1228 nla_nest_end(skb, pfc_nest);
1229 }
1230
1231 /* local app */
1232 spin_lock(&dcb_lock);
1233 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1234 if (!app)
1235 goto dcb_unlock;
1236
1237 list_for_each_entry(itr, &dcb_app_list, list) {
1238 if (itr->ifindex == netdev->ifindex) {
1239 struct nlattr *app_nest = nla_nest_start(skb,
1240 DCB_ATTR_APP);
1241 if (!app_nest)
1242 goto dcb_unlock;
1243
1244 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1245 itr->app.selector);
1246 if (err)
1247 goto dcb_unlock;
1248
1249 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1250 itr->app.protocol);
1251 if (err)
1252 goto dcb_unlock;
1253
1254 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1255 itr->app.priority);
1256 if (err)
1257 goto dcb_unlock;
1258
1259 nla_nest_end(skb, app_nest);
1260 }
1261 }
1262 nla_nest_end(skb, app);
1263
1264 if (netdev->dcbnl_ops->getdcbx)
1265 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1266 else
1267 dcbx = -EOPNOTSUPP;
1268
1269 spin_unlock(&dcb_lock);
1270
1271 /* features flags */
1272 if (ops->getfeatcfg) {
1273 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1274 if (!feat)
1275 goto nla_put_failure;
1276
1277 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1278 i++)
1279 if (!ops->getfeatcfg(netdev, i, &value) &&
1280 nla_put_u8(skb, i, value))
1281 goto nla_put_failure;
1282
1283 nla_nest_end(skb, feat);
1284 }
1285
1286 /* peer info if available */
1287 if (ops->cee_peer_getpg) {
1288 struct cee_pg pg;
1289 memset(&pg, 0, sizeof(pg));
1290 err = ops->cee_peer_getpg(netdev, &pg);
1291 if (!err &&
1292 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1293 goto nla_put_failure;
1294 }
1295
1296 if (ops->cee_peer_getpfc) {
1297 struct cee_pfc pfc;
1298 memset(&pfc, 0, sizeof(pfc));
1299 err = ops->cee_peer_getpfc(netdev, &pfc);
1300 if (!err &&
1301 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1302 goto nla_put_failure;
1303 }
1304
1305 if (ops->peer_getappinfo && ops->peer_getapptable) {
1306 err = dcbnl_build_peer_app(netdev, skb,
1307 DCB_ATTR_CEE_PEER_APP_TABLE,
1308 DCB_ATTR_CEE_PEER_APP_INFO,
1309 DCB_ATTR_CEE_PEER_APP);
1310 if (err)
1311 goto nla_put_failure;
1312 }
1313 nla_nest_end(skb, cee);
1314
1315 /* DCBX state */
1316 if (dcbx >= 0) {
1317 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1318 if (err)
1319 goto nla_put_failure;
1320 }
1321 return 0;
1322
1323 dcb_unlock:
1324 spin_unlock(&dcb_lock);
1325 nla_put_failure:
1326 return err;
1327 }
1328
1329 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1330 u32 seq, u32 portid, int dcbx_ver)
1331 {
1332 struct net *net = dev_net(dev);
1333 struct sk_buff *skb;
1334 struct nlmsghdr *nlh;
1335 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1336 int err;
1337
1338 if (!ops)
1339 return -EOPNOTSUPP;
1340
1341 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1342 if (!skb)
1343 return -ENOBUFS;
1344
1345 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1346 err = dcbnl_ieee_fill(skb, dev);
1347 else
1348 err = dcbnl_cee_fill(skb, dev);
1349
1350 if (err < 0) {
1351 /* Report error to broadcast listeners */
1352 nlmsg_free(skb);
1353 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1354 } else {
1355 /* End nlmsg and notify broadcast listeners */
1356 nlmsg_end(skb, nlh);
1357 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1358 }
1359
1360 return err;
1361 }
1362
1363 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1364 u32 seq, u32 portid)
1365 {
1366 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1367 }
1368 EXPORT_SYMBOL(dcbnl_ieee_notify);
1369
1370 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1371 u32 seq, u32 portid)
1372 {
1373 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1374 }
1375 EXPORT_SYMBOL(dcbnl_cee_notify);
1376
1377 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1378 * be completed the entire msg is aborted and error value is returned.
1379 * No attempt is made to reconcile the case where only part of the
1380 * cmd can be completed.
1381 */
1382 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1383 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1384 {
1385 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1386 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1387 int err;
1388
1389 if (!ops)
1390 return -EOPNOTSUPP;
1391
1392 if (!tb[DCB_ATTR_IEEE])
1393 return -EINVAL;
1394
1395 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1396 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1397 if (err)
1398 return err;
1399
1400 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1401 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1402 err = ops->ieee_setets(netdev, ets);
1403 if (err)
1404 goto err;
1405 }
1406
1407 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1408 struct ieee_maxrate *maxrate =
1409 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1410 err = ops->ieee_setmaxrate(netdev, maxrate);
1411 if (err)
1412 goto err;
1413 }
1414
1415 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1416 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1417 err = ops->ieee_setpfc(netdev, pfc);
1418 if (err)
1419 goto err;
1420 }
1421
1422 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1423 struct nlattr *attr;
1424 int rem;
1425
1426 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1427 struct dcb_app *app_data;
1428 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1429 continue;
1430 app_data = nla_data(attr);
1431 if (ops->ieee_setapp)
1432 err = ops->ieee_setapp(netdev, app_data);
1433 else
1434 err = dcb_ieee_setapp(netdev, app_data);
1435 if (err)
1436 goto err;
1437 }
1438 }
1439
1440 err:
1441 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1442 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1443 return err;
1444 }
1445
1446 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1447 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1448 {
1449 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1450
1451 if (!ops)
1452 return -EOPNOTSUPP;
1453
1454 return dcbnl_ieee_fill(skb, netdev);
1455 }
1456
1457 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1458 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1459 {
1460 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1461 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1462 int err;
1463
1464 if (!ops)
1465 return -EOPNOTSUPP;
1466
1467 if (!tb[DCB_ATTR_IEEE])
1468 return -EINVAL;
1469
1470 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1471 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1472 if (err)
1473 return err;
1474
1475 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1476 struct nlattr *attr;
1477 int rem;
1478
1479 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1480 struct dcb_app *app_data;
1481
1482 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1483 continue;
1484 app_data = nla_data(attr);
1485 if (ops->ieee_delapp)
1486 err = ops->ieee_delapp(netdev, app_data);
1487 else
1488 err = dcb_ieee_delapp(netdev, app_data);
1489 if (err)
1490 goto err;
1491 }
1492 }
1493
1494 err:
1495 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1496 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1497 return err;
1498 }
1499
1500
1501 /* DCBX configuration */
1502 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1503 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1504 {
1505 if (!netdev->dcbnl_ops->getdcbx)
1506 return -EOPNOTSUPP;
1507
1508 return nla_put_u8(skb, DCB_ATTR_DCBX,
1509 netdev->dcbnl_ops->getdcbx(netdev));
1510 }
1511
1512 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1513 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1514 {
1515 u8 value;
1516
1517 if (!netdev->dcbnl_ops->setdcbx)
1518 return -EOPNOTSUPP;
1519
1520 if (!tb[DCB_ATTR_DCBX])
1521 return -EINVAL;
1522
1523 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1524
1525 return nla_put_u8(skb, DCB_ATTR_DCBX,
1526 netdev->dcbnl_ops->setdcbx(netdev, value));
1527 }
1528
1529 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1530 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1531 {
1532 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1533 u8 value;
1534 int ret, i;
1535 int getall = 0;
1536
1537 if (!netdev->dcbnl_ops->getfeatcfg)
1538 return -EOPNOTSUPP;
1539
1540 if (!tb[DCB_ATTR_FEATCFG])
1541 return -EINVAL;
1542
1543 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1544 dcbnl_featcfg_nest);
1545 if (ret)
1546 return ret;
1547
1548 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1549 if (!nest)
1550 return -EMSGSIZE;
1551
1552 if (data[DCB_FEATCFG_ATTR_ALL])
1553 getall = 1;
1554
1555 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1556 if (!getall && !data[i])
1557 continue;
1558
1559 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1560 if (!ret)
1561 ret = nla_put_u8(skb, i, value);
1562
1563 if (ret) {
1564 nla_nest_cancel(skb, nest);
1565 goto nla_put_failure;
1566 }
1567 }
1568 nla_nest_end(skb, nest);
1569
1570 nla_put_failure:
1571 return ret;
1572 }
1573
1574 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1575 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1576 {
1577 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1578 int ret, i;
1579 u8 value;
1580
1581 if (!netdev->dcbnl_ops->setfeatcfg)
1582 return -ENOTSUPP;
1583
1584 if (!tb[DCB_ATTR_FEATCFG])
1585 return -EINVAL;
1586
1587 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1588 dcbnl_featcfg_nest);
1589
1590 if (ret)
1591 goto err;
1592
1593 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1594 if (data[i] == NULL)
1595 continue;
1596
1597 value = nla_get_u8(data[i]);
1598
1599 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1600
1601 if (ret)
1602 goto err;
1603 }
1604 err:
1605 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1606
1607 return ret;
1608 }
1609
1610 /* Handle CEE DCBX GET commands. */
1611 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1612 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1613 {
1614 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1615
1616 if (!ops)
1617 return -EOPNOTSUPP;
1618
1619 return dcbnl_cee_fill(skb, netdev);
1620 }
1621
1622 struct reply_func {
1623 /* reply netlink message type */
1624 int type;
1625
1626 /* function to fill message contents */
1627 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1628 struct nlattr **, struct sk_buff *);
1629 };
1630
1631 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1632 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1633 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1634 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1635 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1636 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1637 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1638 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1639 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1640 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1641 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1642 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1643 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1644 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1645 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1646 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1647 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1648 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1649 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1650 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1651 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1652 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1653 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1654 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1655 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1656 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1657 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1658 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
1659 };
1660
1661 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
1662 {
1663 struct net *net = sock_net(skb->sk);
1664 struct net_device *netdev;
1665 struct dcbmsg *dcb = nlmsg_data(nlh);
1666 struct nlattr *tb[DCB_ATTR_MAX + 1];
1667 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1668 int ret = -EINVAL;
1669 struct sk_buff *reply_skb;
1670 struct nlmsghdr *reply_nlh = NULL;
1671 const struct reply_func *fn;
1672
1673 if ((nlh->nlmsg_type == RTM_SETDCB) && !capable(CAP_NET_ADMIN))
1674 return -EPERM;
1675
1676 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1677 dcbnl_rtnl_policy);
1678 if (ret < 0)
1679 return ret;
1680
1681 if (dcb->cmd > DCB_CMD_MAX)
1682 return -EINVAL;
1683
1684 /* check if a reply function has been defined for the command */
1685 fn = &reply_funcs[dcb->cmd];
1686 if (!fn->cb)
1687 return -EOPNOTSUPP;
1688
1689 if (!tb[DCB_ATTR_IFNAME])
1690 return -EINVAL;
1691
1692 netdev = dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1693 if (!netdev)
1694 return -ENODEV;
1695
1696 if (!netdev->dcbnl_ops) {
1697 ret = -EOPNOTSUPP;
1698 goto out;
1699 }
1700
1701 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1702 nlh->nlmsg_flags, &reply_nlh);
1703 if (!reply_skb) {
1704 ret = -ENOBUFS;
1705 goto out;
1706 }
1707
1708 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1709 if (ret < 0) {
1710 nlmsg_free(reply_skb);
1711 goto out;
1712 }
1713
1714 nlmsg_end(reply_skb, reply_nlh);
1715
1716 ret = rtnl_unicast(reply_skb, net, portid);
1717 out:
1718 dev_put(netdev);
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.
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.
1841 */
1842 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1843 {
1844 struct dcb_app_type event;
1845 int err = 0;
1846
1847 event.ifindex = dev->ifindex;
1848 memcpy(&event.app, new, sizeof(event.app));
1849 if (dev->dcbnl_ops->getdcbx)
1850 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1851
1852 spin_lock(&dcb_lock);
1853 /* Search for existing match and abort if found */
1854 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1855 err = -EEXIST;
1856 goto out;
1857 }
1858
1859 err = dcb_app_add(new, dev->ifindex);
1860 out:
1861 spin_unlock(&dcb_lock);
1862 if (!err)
1863 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1864 return err;
1865 }
1866 EXPORT_SYMBOL(dcb_ieee_setapp);
1867
1868 /**
1869 * dcb_ieee_delapp - delete IEEE dcb application data from list
1870 *
1871 * This removes a matching APP data from the APP list
1872 */
1873 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1874 {
1875 struct dcb_app_type *itr;
1876 struct dcb_app_type event;
1877 int err = -ENOENT;
1878
1879 event.ifindex = dev->ifindex;
1880 memcpy(&event.app, del, sizeof(event.app));
1881 if (dev->dcbnl_ops->getdcbx)
1882 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1883
1884 spin_lock(&dcb_lock);
1885 /* Search for existing match and remove it. */
1886 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1887 list_del(&itr->list);
1888 kfree(itr);
1889 err = 0;
1890 }
1891
1892 spin_unlock(&dcb_lock);
1893 if (!err)
1894 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1895 return err;
1896 }
1897 EXPORT_SYMBOL(dcb_ieee_delapp);
1898
1899 static void dcb_flushapp(void)
1900 {
1901 struct dcb_app_type *app;
1902 struct dcb_app_type *tmp;
1903
1904 spin_lock(&dcb_lock);
1905 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1906 list_del(&app->list);
1907 kfree(app);
1908 }
1909 spin_unlock(&dcb_lock);
1910 }
1911
1912 static int __init dcbnl_init(void)
1913 {
1914 INIT_LIST_HEAD(&dcb_app_list);
1915
1916 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1917 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1918
1919 return 0;
1920 }
1921 module_init(dcbnl_init);
1922
1923 static void __exit dcbnl_exit(void)
1924 {
1925 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1926 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1927 dcb_flushapp();
1928 }
1929 module_exit(dcbnl_exit);
Linus' kernel tree