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x86: kvm guest: pvclock vsyscall support
[linux-2.6.git] / net / dcb / dcbnl.c
blob70989e672304938a39cdf7b7a0dfd87b7497d2a9
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 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 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
475 } else {
476 struct dcb_app app = {
477 .selector = idtype,
478 .protocol = id,
479 };
480 up = dcb_getapp(netdev, &app);
481 }
482
483 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
484 if (!app_nest)
485 return -EMSGSIZE;
486
487 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
488 if (ret)
489 goto out_cancel;
490
491 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
492 if (ret)
493 goto out_cancel;
494
495 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
496 if (ret)
497 goto out_cancel;
498
499 nla_nest_end(skb, app_nest);
500
501 return 0;
502
503 out_cancel:
504 nla_nest_cancel(skb, app_nest);
505 return ret;
506 }
507
508 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
509 u32 seq, struct nlattr **tb, struct sk_buff *skb)
510 {
511 int ret;
512 u16 id;
513 u8 up, idtype;
514 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
515
516 if (!tb[DCB_ATTR_APP])
517 return -EINVAL;
518
519 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
520 dcbnl_app_nest);
521 if (ret)
522 return ret;
523
524 /* all must be non-null */
525 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
526 (!app_tb[DCB_APP_ATTR_ID]) ||
527 (!app_tb[DCB_APP_ATTR_PRIORITY]))
528 return -EINVAL;
529
530 /* either by eth type or by socket number */
531 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
532 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
533 (idtype != DCB_APP_IDTYPE_PORTNUM))
534 return -EINVAL;
535
536 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
537 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
538
539 if (netdev->dcbnl_ops->setapp) {
540 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
541 } else {
542 struct dcb_app app;
543 app.selector = idtype;
544 app.protocol = id;
545 app.priority = up;
546 ret = dcb_setapp(netdev, &app);
547 }
548
549 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
550 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
551
552 return ret;
553 }
554
555 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
556 struct nlattr **tb, struct sk_buff *skb, int dir)
557 {
558 struct nlattr *pg_nest, *param_nest, *data;
559 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
560 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
561 u8 prio, pgid, tc_pct, up_map;
562 int ret;
563 int getall = 0;
564 int i;
565
566 if (!tb[DCB_ATTR_PG_CFG])
567 return -EINVAL;
568
569 if (!netdev->dcbnl_ops->getpgtccfgtx ||
570 !netdev->dcbnl_ops->getpgtccfgrx ||
571 !netdev->dcbnl_ops->getpgbwgcfgtx ||
572 !netdev->dcbnl_ops->getpgbwgcfgrx)
573 return -EOPNOTSUPP;
574
575 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
576 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
577 if (ret)
578 return ret;
579
580 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
581 if (!pg_nest)
582 return -EMSGSIZE;
583
584 if (pg_tb[DCB_PG_ATTR_TC_ALL])
585 getall = 1;
586
587 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
588 if (!getall && !pg_tb[i])
589 continue;
590
591 if (pg_tb[DCB_PG_ATTR_TC_ALL])
592 data = pg_tb[DCB_PG_ATTR_TC_ALL];
593 else
594 data = pg_tb[i];
595 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
596 data, dcbnl_tc_param_nest);
597 if (ret)
598 goto err_pg;
599
600 param_nest = nla_nest_start(skb, i);
601 if (!param_nest)
602 goto err_pg;
603
604 pgid = DCB_ATTR_VALUE_UNDEFINED;
605 prio = DCB_ATTR_VALUE_UNDEFINED;
606 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
607 up_map = DCB_ATTR_VALUE_UNDEFINED;
608
609 if (dir) {
610 /* Rx */
611 netdev->dcbnl_ops->getpgtccfgrx(netdev,
612 i - DCB_PG_ATTR_TC_0, &prio,
613 &pgid, &tc_pct, &up_map);
614 } else {
615 /* Tx */
616 netdev->dcbnl_ops->getpgtccfgtx(netdev,
617 i - DCB_PG_ATTR_TC_0, &prio,
618 &pgid, &tc_pct, &up_map);
619 }
620
621 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
622 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
623 ret = nla_put_u8(skb,
624 DCB_TC_ATTR_PARAM_PGID, pgid);
625 if (ret)
626 goto err_param;
627 }
628 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
629 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
630 ret = nla_put_u8(skb,
631 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
632 if (ret)
633 goto err_param;
634 }
635 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
636 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
637 ret = nla_put_u8(skb,
638 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
639 if (ret)
640 goto err_param;
641 }
642 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
643 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
644 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
645 tc_pct);
646 if (ret)
647 goto err_param;
648 }
649 nla_nest_end(skb, param_nest);
650 }
651
652 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
653 getall = 1;
654 else
655 getall = 0;
656
657 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
658 if (!getall && !pg_tb[i])
659 continue;
660
661 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
662
663 if (dir) {
664 /* Rx */
665 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
666 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
667 } else {
668 /* Tx */
669 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
670 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
671 }
672 ret = nla_put_u8(skb, i, tc_pct);
673 if (ret)
674 goto err_pg;
675 }
676
677 nla_nest_end(skb, pg_nest);
678
679 return 0;
680
681 err_param:
682 nla_nest_cancel(skb, param_nest);
683 err_pg:
684 nla_nest_cancel(skb, pg_nest);
685
686 return -EMSGSIZE;
687 }
688
689 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
690 u32 seq, struct nlattr **tb, struct sk_buff *skb)
691 {
692 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
693 }
694
695 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
696 u32 seq, struct nlattr **tb, struct sk_buff *skb)
697 {
698 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
699 }
700
701 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
702 u32 seq, struct nlattr **tb, struct sk_buff *skb)
703 {
704 u8 value;
705
706 if (!tb[DCB_ATTR_STATE])
707 return -EINVAL;
708
709 if (!netdev->dcbnl_ops->setstate)
710 return -EOPNOTSUPP;
711
712 value = nla_get_u8(tb[DCB_ATTR_STATE]);
713
714 return nla_put_u8(skb, DCB_ATTR_STATE,
715 netdev->dcbnl_ops->setstate(netdev, value));
716 }
717
718 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
719 u32 seq, struct nlattr **tb, struct sk_buff *skb)
720 {
721 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
722 int i;
723 int ret;
724 u8 value;
725
726 if (!tb[DCB_ATTR_PFC_CFG])
727 return -EINVAL;
728
729 if (!netdev->dcbnl_ops->setpfccfg)
730 return -EOPNOTSUPP;
731
732 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
733 tb[DCB_ATTR_PFC_CFG],
734 dcbnl_pfc_up_nest);
735 if (ret)
736 return ret;
737
738 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
739 if (data[i] == NULL)
740 continue;
741 value = nla_get_u8(data[i]);
742 netdev->dcbnl_ops->setpfccfg(netdev,
743 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
744 }
745
746 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
747 }
748
749 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
750 u32 seq, struct nlattr **tb, struct sk_buff *skb)
751 {
752 int ret;
753
754 if (!tb[DCB_ATTR_SET_ALL])
755 return -EINVAL;
756
757 if (!netdev->dcbnl_ops->setall)
758 return -EOPNOTSUPP;
759
760 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
761 netdev->dcbnl_ops->setall(netdev));
762 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
763
764 return ret;
765 }
766
767 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
768 u32 seq, struct nlattr **tb, struct sk_buff *skb,
769 int dir)
770 {
771 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
772 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
773 int ret;
774 int i;
775 u8 pgid;
776 u8 up_map;
777 u8 prio;
778 u8 tc_pct;
779
780 if (!tb[DCB_ATTR_PG_CFG])
781 return -EINVAL;
782
783 if (!netdev->dcbnl_ops->setpgtccfgtx ||
784 !netdev->dcbnl_ops->setpgtccfgrx ||
785 !netdev->dcbnl_ops->setpgbwgcfgtx ||
786 !netdev->dcbnl_ops->setpgbwgcfgrx)
787 return -EOPNOTSUPP;
788
789 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
790 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
791 if (ret)
792 return ret;
793
794 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
795 if (!pg_tb[i])
796 continue;
797
798 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
799 pg_tb[i], dcbnl_tc_param_nest);
800 if (ret)
801 return ret;
802
803 pgid = DCB_ATTR_VALUE_UNDEFINED;
804 prio = DCB_ATTR_VALUE_UNDEFINED;
805 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
806 up_map = DCB_ATTR_VALUE_UNDEFINED;
807
808 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
809 prio =
810 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
811
812 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
813 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
814
815 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
816 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
817
818 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
819 up_map =
820 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
821
822 /* dir: Tx = 0, Rx = 1 */
823 if (dir) {
824 /* Rx */
825 netdev->dcbnl_ops->setpgtccfgrx(netdev,
826 i - DCB_PG_ATTR_TC_0,
827 prio, pgid, tc_pct, up_map);
828 } else {
829 /* Tx */
830 netdev->dcbnl_ops->setpgtccfgtx(netdev,
831 i - DCB_PG_ATTR_TC_0,
832 prio, pgid, tc_pct, up_map);
833 }
834 }
835
836 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
837 if (!pg_tb[i])
838 continue;
839
840 tc_pct = nla_get_u8(pg_tb[i]);
841
842 /* dir: Tx = 0, Rx = 1 */
843 if (dir) {
844 /* Rx */
845 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
846 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
847 } else {
848 /* Tx */
849 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
850 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
851 }
852 }
853
854 return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
855 }
856
857 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
858 u32 seq, struct nlattr **tb, struct sk_buff *skb)
859 {
860 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
861 }
862
863 static int dcbnl_pgrx_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, 1);
867 }
868
869 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
870 u32 seq, struct nlattr **tb, struct sk_buff *skb)
871 {
872 struct nlattr *bcn_nest;
873 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
874 u8 value_byte;
875 u32 value_integer;
876 int ret;
877 bool getall = false;
878 int i;
879
880 if (!tb[DCB_ATTR_BCN])
881 return -EINVAL;
882
883 if (!netdev->dcbnl_ops->getbcnrp ||
884 !netdev->dcbnl_ops->getbcncfg)
885 return -EOPNOTSUPP;
886
887 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
888 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
889 if (ret)
890 return ret;
891
892 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
893 if (!bcn_nest)
894 return -EMSGSIZE;
895
896 if (bcn_tb[DCB_BCN_ATTR_ALL])
897 getall = true;
898
899 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
900 if (!getall && !bcn_tb[i])
901 continue;
902
903 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
904 &value_byte);
905 ret = nla_put_u8(skb, i, value_byte);
906 if (ret)
907 goto err_bcn;
908 }
909
910 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
911 if (!getall && !bcn_tb[i])
912 continue;
913
914 netdev->dcbnl_ops->getbcncfg(netdev, i,
915 &value_integer);
916 ret = nla_put_u32(skb, i, value_integer);
917 if (ret)
918 goto err_bcn;
919 }
920
921 nla_nest_end(skb, bcn_nest);
922
923 return 0;
924
925 err_bcn:
926 nla_nest_cancel(skb, bcn_nest);
927 return ret;
928 }
929
930 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
931 u32 seq, struct nlattr **tb, struct sk_buff *skb)
932 {
933 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
934 int i;
935 int ret;
936 u8 value_byte;
937 u32 value_int;
938
939 if (!tb[DCB_ATTR_BCN])
940 return -EINVAL;
941
942 if (!netdev->dcbnl_ops->setbcncfg ||
943 !netdev->dcbnl_ops->setbcnrp)
944 return -EOPNOTSUPP;
945
946 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
947 tb[DCB_ATTR_BCN],
948 dcbnl_pfc_up_nest);
949 if (ret)
950 return ret;
951
952 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
953 if (data[i] == NULL)
954 continue;
955 value_byte = nla_get_u8(data[i]);
956 netdev->dcbnl_ops->setbcnrp(netdev,
957 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
958 }
959
960 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
961 if (data[i] == NULL)
962 continue;
963 value_int = nla_get_u32(data[i]);
964 netdev->dcbnl_ops->setbcncfg(netdev,
965 i, value_int);
966 }
967
968 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
969 }
970
971 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
972 int app_nested_type, int app_info_type,
973 int app_entry_type)
974 {
975 struct dcb_peer_app_info info;
976 struct dcb_app *table = NULL;
977 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
978 u16 app_count;
979 int err;
980
981
982 /**
983 * retrieve the peer app configuration form the driver. If the driver
984 * handlers fail exit without doing anything
985 */
986 err = ops->peer_getappinfo(netdev, &info, &app_count);
987 if (!err && app_count) {
988 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
989 if (!table)
990 return -ENOMEM;
991
992 err = ops->peer_getapptable(netdev, table);
993 }
994
995 if (!err) {
996 u16 i;
997 struct nlattr *app;
998
999 /**
1000 * build the message, from here on the only possible failure
1001 * is due to the skb size
1002 */
1003 err = -EMSGSIZE;
1004
1005 app = nla_nest_start(skb, app_nested_type);
1006 if (!app)
1007 goto nla_put_failure;
1008
1009 if (app_info_type &&
1010 nla_put(skb, app_info_type, sizeof(info), &info))
1011 goto nla_put_failure;
1012
1013 for (i = 0; i < app_count; i++) {
1014 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1015 &table[i]))
1016 goto nla_put_failure;
1017 }
1018 nla_nest_end(skb, app);
1019 }
1020 err = 0;
1021
1022 nla_put_failure:
1023 kfree(table);
1024 return err;
1025 }
1026
1027 /* Handle IEEE 802.1Qaz GET commands. */
1028 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1029 {
1030 struct nlattr *ieee, *app;
1031 struct dcb_app_type *itr;
1032 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1033 int dcbx;
1034 int err;
1035
1036 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1037 return -EMSGSIZE;
1038
1039 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1040 if (!ieee)
1041 return -EMSGSIZE;
1042
1043 if (ops->ieee_getets) {
1044 struct ieee_ets ets;
1045 err = ops->ieee_getets(netdev, &ets);
1046 if (!err &&
1047 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1048 return -EMSGSIZE;
1049 }
1050
1051 if (ops->ieee_getmaxrate) {
1052 struct ieee_maxrate maxrate;
1053 err = ops->ieee_getmaxrate(netdev, &maxrate);
1054 if (!err) {
1055 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1056 sizeof(maxrate), &maxrate);
1057 if (err)
1058 return -EMSGSIZE;
1059 }
1060 }
1061
1062 if (ops->ieee_getpfc) {
1063 struct ieee_pfc pfc;
1064 err = ops->ieee_getpfc(netdev, &pfc);
1065 if (!err &&
1066 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1067 return -EMSGSIZE;
1068 }
1069
1070 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1071 if (!app)
1072 return -EMSGSIZE;
1073
1074 spin_lock(&dcb_lock);
1075 list_for_each_entry(itr, &dcb_app_list, list) {
1076 if (itr->ifindex == netdev->ifindex) {
1077 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1078 &itr->app);
1079 if (err) {
1080 spin_unlock(&dcb_lock);
1081 return -EMSGSIZE;
1082 }
1083 }
1084 }
1085
1086 if (netdev->dcbnl_ops->getdcbx)
1087 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1088 else
1089 dcbx = -EOPNOTSUPP;
1090
1091 spin_unlock(&dcb_lock);
1092 nla_nest_end(skb, app);
1093
1094 /* get peer info if available */
1095 if (ops->ieee_peer_getets) {
1096 struct ieee_ets ets;
1097 err = ops->ieee_peer_getets(netdev, &ets);
1098 if (!err &&
1099 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1100 return -EMSGSIZE;
1101 }
1102
1103 if (ops->ieee_peer_getpfc) {
1104 struct ieee_pfc pfc;
1105 err = ops->ieee_peer_getpfc(netdev, &pfc);
1106 if (!err &&
1107 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1108 return -EMSGSIZE;
1109 }
1110
1111 if (ops->peer_getappinfo && ops->peer_getapptable) {
1112 err = dcbnl_build_peer_app(netdev, skb,
1113 DCB_ATTR_IEEE_PEER_APP,
1114 DCB_ATTR_IEEE_APP_UNSPEC,
1115 DCB_ATTR_IEEE_APP);
1116 if (err)
1117 return -EMSGSIZE;
1118 }
1119
1120 nla_nest_end(skb, ieee);
1121 if (dcbx >= 0) {
1122 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1123 if (err)
1124 return -EMSGSIZE;
1125 }
1126
1127 return 0;
1128 }
1129
1130 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1131 int dir)
1132 {
1133 u8 pgid, up_map, prio, tc_pct;
1134 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1135 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1136 struct nlattr *pg = nla_nest_start(skb, i);
1137
1138 if (!pg)
1139 return -EMSGSIZE;
1140
1141 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1142 struct nlattr *tc_nest = nla_nest_start(skb, i);
1143
1144 if (!tc_nest)
1145 return -EMSGSIZE;
1146
1147 pgid = DCB_ATTR_VALUE_UNDEFINED;
1148 prio = DCB_ATTR_VALUE_UNDEFINED;
1149 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1150 up_map = DCB_ATTR_VALUE_UNDEFINED;
1151
1152 if (!dir)
1153 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1154 &prio, &pgid, &tc_pct, &up_map);
1155 else
1156 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1157 &prio, &pgid, &tc_pct, &up_map);
1158
1159 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1160 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1161 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1162 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1163 return -EMSGSIZE;
1164 nla_nest_end(skb, tc_nest);
1165 }
1166
1167 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1168 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1169
1170 if (!dir)
1171 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1172 &tc_pct);
1173 else
1174 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1175 &tc_pct);
1176 if (nla_put_u8(skb, i, tc_pct))
1177 return -EMSGSIZE;
1178 }
1179 nla_nest_end(skb, pg);
1180 return 0;
1181 }
1182
1183 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1184 {
1185 struct nlattr *cee, *app;
1186 struct dcb_app_type *itr;
1187 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1188 int dcbx, i, err = -EMSGSIZE;
1189 u8 value;
1190
1191 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1192 goto nla_put_failure;
1193 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1194 if (!cee)
1195 goto nla_put_failure;
1196
1197 /* local pg */
1198 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1199 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1200 if (err)
1201 goto nla_put_failure;
1202 }
1203
1204 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1205 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1206 if (err)
1207 goto nla_put_failure;
1208 }
1209
1210 /* local pfc */
1211 if (ops->getpfccfg) {
1212 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1213
1214 if (!pfc_nest)
1215 goto nla_put_failure;
1216
1217 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1218 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1219 if (nla_put_u8(skb, i, value))
1220 goto nla_put_failure;
1221 }
1222 nla_nest_end(skb, pfc_nest);
1223 }
1224
1225 /* local app */
1226 spin_lock(&dcb_lock);
1227 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1228 if (!app)
1229 goto dcb_unlock;
1230
1231 list_for_each_entry(itr, &dcb_app_list, list) {
1232 if (itr->ifindex == netdev->ifindex) {
1233 struct nlattr *app_nest = nla_nest_start(skb,
1234 DCB_ATTR_APP);
1235 if (!app_nest)
1236 goto dcb_unlock;
1237
1238 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1239 itr->app.selector);
1240 if (err)
1241 goto dcb_unlock;
1242
1243 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1244 itr->app.protocol);
1245 if (err)
1246 goto dcb_unlock;
1247
1248 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1249 itr->app.priority);
1250 if (err)
1251 goto dcb_unlock;
1252
1253 nla_nest_end(skb, app_nest);
1254 }
1255 }
1256 nla_nest_end(skb, app);
1257
1258 if (netdev->dcbnl_ops->getdcbx)
1259 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1260 else
1261 dcbx = -EOPNOTSUPP;
1262
1263 spin_unlock(&dcb_lock);
1264
1265 /* features flags */
1266 if (ops->getfeatcfg) {
1267 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1268 if (!feat)
1269 goto nla_put_failure;
1270
1271 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1272 i++)
1273 if (!ops->getfeatcfg(netdev, i, &value) &&
1274 nla_put_u8(skb, i, value))
1275 goto nla_put_failure;
1276
1277 nla_nest_end(skb, feat);
1278 }
1279
1280 /* peer info if available */
1281 if (ops->cee_peer_getpg) {
1282 struct cee_pg pg;
1283 err = ops->cee_peer_getpg(netdev, &pg);
1284 if (!err &&
1285 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1286 goto nla_put_failure;
1287 }
1288
1289 if (ops->cee_peer_getpfc) {
1290 struct cee_pfc pfc;
1291 err = ops->cee_peer_getpfc(netdev, &pfc);
1292 if (!err &&
1293 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1294 goto nla_put_failure;
1295 }
1296
1297 if (ops->peer_getappinfo && ops->peer_getapptable) {
1298 err = dcbnl_build_peer_app(netdev, skb,
1299 DCB_ATTR_CEE_PEER_APP_TABLE,
1300 DCB_ATTR_CEE_PEER_APP_INFO,
1301 DCB_ATTR_CEE_PEER_APP);
1302 if (err)
1303 goto nla_put_failure;
1304 }
1305 nla_nest_end(skb, cee);
1306
1307 /* DCBX state */
1308 if (dcbx >= 0) {
1309 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1310 if (err)
1311 goto nla_put_failure;
1312 }
1313 return 0;
1314
1315 dcb_unlock:
1316 spin_unlock(&dcb_lock);
1317 nla_put_failure:
1318 return err;
1319 }
1320
1321 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1322 u32 seq, u32 portid, int dcbx_ver)
1323 {
1324 struct net *net = dev_net(dev);
1325 struct sk_buff *skb;
1326 struct nlmsghdr *nlh;
1327 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1328 int err;
1329
1330 if (!ops)
1331 return -EOPNOTSUPP;
1332
1333 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1334 if (!skb)
1335 return -ENOBUFS;
1336
1337 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1338 err = dcbnl_ieee_fill(skb, dev);
1339 else
1340 err = dcbnl_cee_fill(skb, dev);
1341
1342 if (err < 0) {
1343 /* Report error to broadcast listeners */
1344 nlmsg_free(skb);
1345 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1346 } else {
1347 /* End nlmsg and notify broadcast listeners */
1348 nlmsg_end(skb, nlh);
1349 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1350 }
1351
1352 return err;
1353 }
1354
1355 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1356 u32 seq, u32 portid)
1357 {
1358 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1359 }
1360 EXPORT_SYMBOL(dcbnl_ieee_notify);
1361
1362 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1363 u32 seq, u32 portid)
1364 {
1365 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1366 }
1367 EXPORT_SYMBOL(dcbnl_cee_notify);
1368
1369 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1370 * be completed the entire msg is aborted and error value is returned.
1371 * No attempt is made to reconcile the case where only part of the
1372 * cmd can be completed.
1373 */
1374 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1375 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1376 {
1377 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1378 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1379 int err;
1380
1381 if (!ops)
1382 return -EOPNOTSUPP;
1383
1384 if (!tb[DCB_ATTR_IEEE])
1385 return -EINVAL;
1386
1387 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1388 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1389 if (err)
1390 return err;
1391
1392 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1393 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1394 err = ops->ieee_setets(netdev, ets);
1395 if (err)
1396 goto err;
1397 }
1398
1399 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1400 struct ieee_maxrate *maxrate =
1401 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1402 err = ops->ieee_setmaxrate(netdev, maxrate);
1403 if (err)
1404 goto err;
1405 }
1406
1407 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1408 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1409 err = ops->ieee_setpfc(netdev, pfc);
1410 if (err)
1411 goto err;
1412 }
1413
1414 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1415 struct nlattr *attr;
1416 int rem;
1417
1418 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1419 struct dcb_app *app_data;
1420 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1421 continue;
1422 app_data = nla_data(attr);
1423 if (ops->ieee_setapp)
1424 err = ops->ieee_setapp(netdev, app_data);
1425 else
1426 err = dcb_ieee_setapp(netdev, app_data);
1427 if (err)
1428 goto err;
1429 }
1430 }
1431
1432 err:
1433 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1434 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1435 return err;
1436 }
1437
1438 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1439 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1440 {
1441 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1442
1443 if (!ops)
1444 return -EOPNOTSUPP;
1445
1446 return dcbnl_ieee_fill(skb, netdev);
1447 }
1448
1449 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1450 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1451 {
1452 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1453 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1454 int err;
1455
1456 if (!ops)
1457 return -EOPNOTSUPP;
1458
1459 if (!tb[DCB_ATTR_IEEE])
1460 return -EINVAL;
1461
1462 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1463 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1464 if (err)
1465 return err;
1466
1467 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1468 struct nlattr *attr;
1469 int rem;
1470
1471 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1472 struct dcb_app *app_data;
1473
1474 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1475 continue;
1476 app_data = nla_data(attr);
1477 if (ops->ieee_delapp)
1478 err = ops->ieee_delapp(netdev, app_data);
1479 else
1480 err = dcb_ieee_delapp(netdev, app_data);
1481 if (err)
1482 goto err;
1483 }
1484 }
1485
1486 err:
1487 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1488 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1489 return err;
1490 }
1491
1492
1493 /* DCBX configuration */
1494 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1495 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1496 {
1497 if (!netdev->dcbnl_ops->getdcbx)
1498 return -EOPNOTSUPP;
1499
1500 return nla_put_u8(skb, DCB_ATTR_DCBX,
1501 netdev->dcbnl_ops->getdcbx(netdev));
1502 }
1503
1504 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1505 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1506 {
1507 u8 value;
1508
1509 if (!netdev->dcbnl_ops->setdcbx)
1510 return -EOPNOTSUPP;
1511
1512 if (!tb[DCB_ATTR_DCBX])
1513 return -EINVAL;
1514
1515 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1516
1517 return nla_put_u8(skb, DCB_ATTR_DCBX,
1518 netdev->dcbnl_ops->setdcbx(netdev, value));
1519 }
1520
1521 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1522 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1523 {
1524 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1525 u8 value;
1526 int ret, i;
1527 int getall = 0;
1528
1529 if (!netdev->dcbnl_ops->getfeatcfg)
1530 return -EOPNOTSUPP;
1531
1532 if (!tb[DCB_ATTR_FEATCFG])
1533 return -EINVAL;
1534
1535 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1536 dcbnl_featcfg_nest);
1537 if (ret)
1538 return ret;
1539
1540 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1541 if (!nest)
1542 return -EMSGSIZE;
1543
1544 if (data[DCB_FEATCFG_ATTR_ALL])
1545 getall = 1;
1546
1547 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1548 if (!getall && !data[i])
1549 continue;
1550
1551 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1552 if (!ret)
1553 ret = nla_put_u8(skb, i, value);
1554
1555 if (ret) {
1556 nla_nest_cancel(skb, nest);
1557 goto nla_put_failure;
1558 }
1559 }
1560 nla_nest_end(skb, nest);
1561
1562 nla_put_failure:
1563 return ret;
1564 }
1565
1566 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1567 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1568 {
1569 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1570 int ret, i;
1571 u8 value;
1572
1573 if (!netdev->dcbnl_ops->setfeatcfg)
1574 return -ENOTSUPP;
1575
1576 if (!tb[DCB_ATTR_FEATCFG])
1577 return -EINVAL;
1578
1579 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1580 dcbnl_featcfg_nest);
1581
1582 if (ret)
1583 goto err;
1584
1585 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1586 if (data[i] == NULL)
1587 continue;
1588
1589 value = nla_get_u8(data[i]);
1590
1591 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1592
1593 if (ret)
1594 goto err;
1595 }
1596 err:
1597 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1598
1599 return ret;
1600 }
1601
1602 /* Handle CEE DCBX GET commands. */
1603 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1604 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1605 {
1606 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1607
1608 if (!ops)
1609 return -EOPNOTSUPP;
1610
1611 return dcbnl_cee_fill(skb, netdev);
1612 }
1613
1614 struct reply_func {
1615 /* reply netlink message type */
1616 int type;
1617
1618 /* function to fill message contents */
1619 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1620 struct nlattr **, struct sk_buff *);
1621 };
1622
1623 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1624 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1625 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1626 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1627 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1628 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1629 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1630 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1631 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1632 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1633 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1634 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1635 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1636 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1637 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1638 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1639 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1640 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1641 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1642 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1643 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1644 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1645 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1646 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1647 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1648 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1649 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1650 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
1651 };
1652
1653 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1654 {
1655 struct net *net = sock_net(skb->sk);
1656 struct net_device *netdev;
1657 struct dcbmsg *dcb = nlmsg_data(nlh);
1658 struct nlattr *tb[DCB_ATTR_MAX + 1];
1659 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1660 int ret = -EINVAL;
1661 struct sk_buff *reply_skb;
1662 struct nlmsghdr *reply_nlh = NULL;
1663 const struct reply_func *fn;
1664
1665 if (!net_eq(net, &init_net))
1666 return -EINVAL;
1667
1668 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1669 dcbnl_rtnl_policy);
1670 if (ret < 0)
1671 return ret;
1672
1673 if (dcb->cmd > DCB_CMD_MAX)
1674 return -EINVAL;
1675
1676 /* check if a reply function has been defined for the command */
1677 fn = &reply_funcs[dcb->cmd];
1678 if (!fn->cb)
1679 return -EOPNOTSUPP;
1680
1681 if (!tb[DCB_ATTR_IFNAME])
1682 return -EINVAL;
1683
1684 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1685 if (!netdev)
1686 return -ENODEV;
1687
1688 if (!netdev->dcbnl_ops) {
1689 ret = -EOPNOTSUPP;
1690 goto out;
1691 }
1692
1693 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1694 nlh->nlmsg_flags, &reply_nlh);
1695 if (!reply_skb) {
1696 ret = -ENOBUFS;
1697 goto out;
1698 }
1699
1700 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1701 if (ret < 0) {
1702 nlmsg_free(reply_skb);
1703 goto out;
1704 }
1705
1706 nlmsg_end(reply_skb, reply_nlh);
1707
1708 ret = rtnl_unicast(reply_skb, &init_net, portid);
1709 out:
1710 dev_put(netdev);
1711 return ret;
1712 }
1713
1714 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1715 int ifindex, int prio)
1716 {
1717 struct dcb_app_type *itr;
1718
1719 list_for_each_entry(itr, &dcb_app_list, list) {
1720 if (itr->app.selector == app->selector &&
1721 itr->app.protocol == app->protocol &&
1722 itr->ifindex == ifindex &&
1723 (!prio || itr->app.priority == prio))
1724 return itr;
1725 }
1726
1727 return NULL;
1728 }
1729
1730 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1731 {
1732 struct dcb_app_type *entry;
1733
1734 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1735 if (!entry)
1736 return -ENOMEM;
1737
1738 memcpy(&entry->app, app, sizeof(*app));
1739 entry->ifindex = ifindex;
1740 list_add(&entry->list, &dcb_app_list);
1741
1742 return 0;
1743 }
1744
1745 /**
1746 * dcb_getapp - retrieve the DCBX application user priority
1747 *
1748 * On success returns a non-zero 802.1p user priority bitmap
1749 * otherwise returns 0 as the invalid user priority bitmap to
1750 * indicate an error.
1751 */
1752 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1753 {
1754 struct dcb_app_type *itr;
1755 u8 prio = 0;
1756
1757 spin_lock(&dcb_lock);
1758 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1759 prio = itr->app.priority;
1760 spin_unlock(&dcb_lock);
1761
1762 return prio;
1763 }
1764 EXPORT_SYMBOL(dcb_getapp);
1765
1766 /**
1767 * dcb_setapp - add CEE dcb application data to app list
1768 *
1769 * Priority 0 is an invalid priority in CEE spec. This routine
1770 * removes applications from the app list if the priority is
1771 * set to zero.
1772 */
1773 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1774 {
1775 struct dcb_app_type *itr;
1776 struct dcb_app_type event;
1777 int err = 0;
1778
1779 event.ifindex = dev->ifindex;
1780 memcpy(&event.app, new, sizeof(event.app));
1781 if (dev->dcbnl_ops->getdcbx)
1782 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1783
1784 spin_lock(&dcb_lock);
1785 /* Search for existing match and replace */
1786 if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1787 if (new->priority)
1788 itr->app.priority = new->priority;
1789 else {
1790 list_del(&itr->list);
1791 kfree(itr);
1792 }
1793 goto out;
1794 }
1795 /* App type does not exist add new application type */
1796 if (new->priority)
1797 err = dcb_app_add(new, dev->ifindex);
1798 out:
1799 spin_unlock(&dcb_lock);
1800 if (!err)
1801 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1802 return err;
1803 }
1804 EXPORT_SYMBOL(dcb_setapp);
1805
1806 /**
1807 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1808 *
1809 * Helper routine which on success returns a non-zero 802.1Qaz user
1810 * priority bitmap otherwise returns 0 to indicate the dcb_app was
1811 * not found in APP list.
1812 */
1813 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1814 {
1815 struct dcb_app_type *itr;
1816 u8 prio = 0;
1817
1818 spin_lock(&dcb_lock);
1819 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1820 prio |= 1 << itr->app.priority;
1821 spin_unlock(&dcb_lock);
1822
1823 return prio;
1824 }
1825 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1826
1827 /**
1828 * dcb_ieee_setapp - add IEEE dcb application data to app list
1829 *
1830 * This adds Application data to the list. Multiple application
1831 * entries may exists for the same selector and protocol as long
1832 * as the priorities are different.
1833 */
1834 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1835 {
1836 struct dcb_app_type event;
1837 int err = 0;
1838
1839 event.ifindex = dev->ifindex;
1840 memcpy(&event.app, new, sizeof(event.app));
1841 if (dev->dcbnl_ops->getdcbx)
1842 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1843
1844 spin_lock(&dcb_lock);
1845 /* Search for existing match and abort if found */
1846 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1847 err = -EEXIST;
1848 goto out;
1849 }
1850
1851 err = dcb_app_add(new, dev->ifindex);
1852 out:
1853 spin_unlock(&dcb_lock);
1854 if (!err)
1855 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1856 return err;
1857 }
1858 EXPORT_SYMBOL(dcb_ieee_setapp);
1859
1860 /**
1861 * dcb_ieee_delapp - delete IEEE dcb application data from list
1862 *
1863 * This removes a matching APP data from the APP list
1864 */
1865 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1866 {
1867 struct dcb_app_type *itr;
1868 struct dcb_app_type event;
1869 int err = -ENOENT;
1870
1871 event.ifindex = dev->ifindex;
1872 memcpy(&event.app, del, sizeof(event.app));
1873 if (dev->dcbnl_ops->getdcbx)
1874 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1875
1876 spin_lock(&dcb_lock);
1877 /* Search for existing match and remove it. */
1878 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1879 list_del(&itr->list);
1880 kfree(itr);
1881 err = 0;
1882 }
1883
1884 spin_unlock(&dcb_lock);
1885 if (!err)
1886 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1887 return err;
1888 }
1889 EXPORT_SYMBOL(dcb_ieee_delapp);
1890
1891 static void dcb_flushapp(void)
1892 {
1893 struct dcb_app_type *app;
1894 struct dcb_app_type *tmp;
1895
1896 spin_lock(&dcb_lock);
1897 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1898 list_del(&app->list);
1899 kfree(app);
1900 }
1901 spin_unlock(&dcb_lock);
1902 }
1903
1904 static int __init dcbnl_init(void)
1905 {
1906 INIT_LIST_HEAD(&dcb_app_list);
1907
1908 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1909 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1910
1911 return 0;
1912 }
1913 module_init(dcbnl_init);
1914
1915 static void __exit dcbnl_exit(void)
1916 {
1917 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1918 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1919 dcb_flushapp();
1920 }
1921 module_exit(dcbnl_exit);
Linus' kernel tree