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dcbnl: Silence harmless gcc warning about uninitialized reply_nlh
[linux-2.6/btrfs-unstable.git] / net / dcb / dcbnl.c
blobda6ee81ce51f4067b919618a766031cc18de99df
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 /**
32 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
33 * intended to allow network traffic with differing requirements
34 * (highly reliable, no drops vs. best effort vs. low latency) to operate
35 * and co-exist on Ethernet. Current DCB features are:
36 *
37 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
38 * framework for assigning bandwidth guarantees to traffic classes.
39 *
40 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
41 * can work independently for each 802.1p priority.
42 *
43 * Congestion Notification - provides a mechanism for end-to-end congestion
44 * control for protocols which do not have built-in congestion management.
45 *
46 * More information about the emerging standards for these Ethernet features
47 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
48 *
49 * This file implements an rtnetlink interface to allow configuration of DCB
50 * features for capable devices.
51 */
52
53 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
54 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
55 MODULE_LICENSE("GPL");
56
57 /**************** DCB attribute policies *************************************/
58
59 /* DCB netlink attributes policy */
60 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
61 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
62 [DCB_ATTR_STATE] = {.type = NLA_U8},
63 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
64 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
65 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
66 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
67 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
68 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
69 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
70 [DCB_ATTR_APP] = {.type = NLA_NESTED},
71 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
72 [DCB_ATTR_DCBX] = {.type = NLA_U8},
73 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
74 };
75
76 /* DCB priority flow control to User Priority nested attributes */
77 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
78 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
85 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
86 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
87 };
88
89 /* DCB priority grouping nested attributes */
90 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
91 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
99 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
100 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
107 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
108 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
109 };
110
111 /* DCB traffic class nested attributes. */
112 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
113 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
116 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
117 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
118 };
119
120 /* DCB capabilities nested attributes. */
121 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
122 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
123 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
129 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
130 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
131 };
132
133 /* DCB capabilities nested attributes. */
134 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
135 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
136 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
137 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
138 };
139
140 /* DCB BCN nested attributes. */
141 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
142 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
149 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
150 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
151 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
165 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
166 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
167 };
168
169 /* DCB APP nested attributes. */
170 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
171 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
172 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
173 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
174 };
175
176 /* IEEE 802.1Qaz nested attributes. */
177 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
178 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
179 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
180 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
181 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
182 };
183
184 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
185 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
186 };
187
188 /* DCB number of traffic classes nested attributes. */
189 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
190 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
191 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
192 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
193 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
194 };
195
196 static LIST_HEAD(dcb_app_list);
197 static DEFINE_SPINLOCK(dcb_lock);
198
199 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
200 u32 flags, struct nlmsghdr **nlhp)
201 {
202 struct sk_buff *skb;
203 struct dcbmsg *dcb;
204 struct nlmsghdr *nlh;
205
206 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
207 if (!skb)
208 return NULL;
209
210 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
211 if (!nlh) {
212 /* header should always fit, allocation must be buggy */
213 BUG();
214 }
215
216 dcb = nlmsg_data(nlh);
217 dcb->dcb_family = AF_UNSPEC;
218 dcb->cmd = cmd;
219 dcb->dcb_pad = 0;
220
221 if (nlhp)
222 *nlhp = nlh;
223
224 return skb;
225 }
226
227 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
228 u32 seq, struct nlattr **tb, struct sk_buff *skb)
229 {
230 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
231 if (!netdev->dcbnl_ops->getstate)
232 return -EOPNOTSUPP;
233
234 return nla_put_u8(skb, DCB_ATTR_STATE,
235 netdev->dcbnl_ops->getstate(netdev));
236 }
237
238 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
239 u32 seq, struct nlattr **tb, struct sk_buff *skb)
240 {
241 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
242 u8 value;
243 int ret;
244 int i;
245 int getall = 0;
246
247 if (!tb[DCB_ATTR_PFC_CFG])
248 return -EINVAL;
249
250 if (!netdev->dcbnl_ops->getpfccfg)
251 return -EOPNOTSUPP;
252
253 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
254 tb[DCB_ATTR_PFC_CFG],
255 dcbnl_pfc_up_nest);
256 if (ret)
257 return ret;
258
259 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
260 if (!nest)
261 return -EMSGSIZE;
262
263 if (data[DCB_PFC_UP_ATTR_ALL])
264 getall = 1;
265
266 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
267 if (!getall && !data[i])
268 continue;
269
270 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
271 &value);
272 ret = nla_put_u8(skb, i, value);
273 if (ret) {
274 nla_nest_cancel(skb, nest);
275 return ret;
276 }
277 }
278 nla_nest_end(skb, nest);
279
280 return 0;
281 }
282
283 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
284 u32 seq, struct nlattr **tb, struct sk_buff *skb)
285 {
286 u8 perm_addr[MAX_ADDR_LEN];
287
288 if (!netdev->dcbnl_ops->getpermhwaddr)
289 return -EOPNOTSUPP;
290
291 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
292
293 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
294 }
295
296 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
297 u32 seq, struct nlattr **tb, struct sk_buff *skb)
298 {
299 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
300 u8 value;
301 int ret;
302 int i;
303 int getall = 0;
304
305 if (!tb[DCB_ATTR_CAP])
306 return -EINVAL;
307
308 if (!netdev->dcbnl_ops->getcap)
309 return -EOPNOTSUPP;
310
311 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
312 dcbnl_cap_nest);
313 if (ret)
314 return ret;
315
316 nest = nla_nest_start(skb, DCB_ATTR_CAP);
317 if (!nest)
318 return -EMSGSIZE;
319
320 if (data[DCB_CAP_ATTR_ALL])
321 getall = 1;
322
323 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
324 if (!getall && !data[i])
325 continue;
326
327 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
328 ret = nla_put_u8(skb, i, value);
329 if (ret) {
330 nla_nest_cancel(skb, nest);
331 return ret;
332 }
333 }
334 }
335 nla_nest_end(skb, nest);
336
337 return 0;
338 }
339
340 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
341 u32 seq, struct nlattr **tb, struct sk_buff *skb)
342 {
343 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
344 u8 value;
345 int ret;
346 int i;
347 int getall = 0;
348
349 if (!tb[DCB_ATTR_NUMTCS])
350 return -EINVAL;
351
352 if (!netdev->dcbnl_ops->getnumtcs)
353 return -EOPNOTSUPP;
354
355 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
356 dcbnl_numtcs_nest);
357 if (ret)
358 return ret;
359
360 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
361 if (!nest)
362 return -EMSGSIZE;
363
364 if (data[DCB_NUMTCS_ATTR_ALL])
365 getall = 1;
366
367 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
368 if (!getall && !data[i])
369 continue;
370
371 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
372 if (!ret) {
373 ret = nla_put_u8(skb, i, value);
374 if (ret) {
375 nla_nest_cancel(skb, nest);
376 return ret;
377 }
378 } else
379 return -EINVAL;
380 }
381 nla_nest_end(skb, nest);
382
383 return 0;
384 }
385
386 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
387 u32 seq, struct nlattr **tb, struct sk_buff *skb)
388 {
389 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
390 int ret;
391 u8 value;
392 int i;
393
394 if (!tb[DCB_ATTR_NUMTCS])
395 return -EINVAL;
396
397 if (!netdev->dcbnl_ops->setnumtcs)
398 return -EOPNOTSUPP;
399
400 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
401 dcbnl_numtcs_nest);
402 if (ret)
403 return ret;
404
405 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
406 if (data[i] == NULL)
407 continue;
408
409 value = nla_get_u8(data[i]);
410
411 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
412 if (ret)
413 break;
414 }
415
416 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
417 }
418
419 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
420 u32 seq, struct nlattr **tb, struct sk_buff *skb)
421 {
422 if (!netdev->dcbnl_ops->getpfcstate)
423 return -EOPNOTSUPP;
424
425 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
426 netdev->dcbnl_ops->getpfcstate(netdev));
427 }
428
429 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
430 u32 seq, struct nlattr **tb, struct sk_buff *skb)
431 {
432 u8 value;
433
434 if (!tb[DCB_ATTR_PFC_STATE])
435 return -EINVAL;
436
437 if (!netdev->dcbnl_ops->setpfcstate)
438 return -EOPNOTSUPP;
439
440 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
441
442 netdev->dcbnl_ops->setpfcstate(netdev, value);
443
444 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
445 }
446
447 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
448 u32 seq, struct nlattr **tb, struct sk_buff *skb)
449 {
450 struct nlattr *app_nest;
451 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
452 u16 id;
453 u8 up, idtype;
454 int ret;
455
456 if (!tb[DCB_ATTR_APP])
457 return -EINVAL;
458
459 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
460 dcbnl_app_nest);
461 if (ret)
462 return ret;
463
464 /* all must be non-null */
465 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
466 (!app_tb[DCB_APP_ATTR_ID]))
467 return -EINVAL;
468
469 /* either by eth type or by socket number */
470 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
471 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
472 (idtype != DCB_APP_IDTYPE_PORTNUM))
473 return -EINVAL;
474
475 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
476
477 if (netdev->dcbnl_ops->getapp) {
478 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
479 } else {
480 struct dcb_app app = {
481 .selector = idtype,
482 .protocol = id,
483 };
484 up = dcb_getapp(netdev, &app);
485 }
486
487 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
488 if (!app_nest)
489 return -EMSGSIZE;
490
491 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
492 if (ret)
493 goto out_cancel;
494
495 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
496 if (ret)
497 goto out_cancel;
498
499 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
500 if (ret)
501 goto out_cancel;
502
503 nla_nest_end(skb, app_nest);
504
505 return 0;
506
507 out_cancel:
508 nla_nest_cancel(skb, app_nest);
509 return ret;
510 }
511
512 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
513 u32 seq, struct nlattr **tb, struct sk_buff *skb)
514 {
515 int ret;
516 u16 id;
517 u8 up, idtype;
518 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
519
520 if (!tb[DCB_ATTR_APP])
521 return -EINVAL;
522
523 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
524 dcbnl_app_nest);
525 if (ret)
526 return ret;
527
528 /* all must be non-null */
529 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
530 (!app_tb[DCB_APP_ATTR_ID]) ||
531 (!app_tb[DCB_APP_ATTR_PRIORITY]))
532 return -EINVAL;
533
534 /* either by eth type or by socket number */
535 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
536 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
537 (idtype != DCB_APP_IDTYPE_PORTNUM))
538 return -EINVAL;
539
540 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
541 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
542
543 if (netdev->dcbnl_ops->setapp) {
544 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
545 } else {
546 struct dcb_app app;
547 app.selector = idtype;
548 app.protocol = id;
549 app.priority = up;
550 ret = dcb_setapp(netdev, &app);
551 }
552
553 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
554 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
555
556 return ret;
557 }
558
559 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
560 struct nlattr **tb, struct sk_buff *skb, int dir)
561 {
562 struct nlattr *pg_nest, *param_nest, *data;
563 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
564 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
565 u8 prio, pgid, tc_pct, up_map;
566 int ret;
567 int getall = 0;
568 int i;
569
570 if (!tb[DCB_ATTR_PG_CFG])
571 return -EINVAL;
572
573 if (!netdev->dcbnl_ops->getpgtccfgtx ||
574 !netdev->dcbnl_ops->getpgtccfgrx ||
575 !netdev->dcbnl_ops->getpgbwgcfgtx ||
576 !netdev->dcbnl_ops->getpgbwgcfgrx)
577 return -EOPNOTSUPP;
578
579 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
580 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
581 if (ret)
582 return ret;
583
584 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
585 if (!pg_nest)
586 return -EMSGSIZE;
587
588 if (pg_tb[DCB_PG_ATTR_TC_ALL])
589 getall = 1;
590
591 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
592 if (!getall && !pg_tb[i])
593 continue;
594
595 if (pg_tb[DCB_PG_ATTR_TC_ALL])
596 data = pg_tb[DCB_PG_ATTR_TC_ALL];
597 else
598 data = pg_tb[i];
599 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
600 data, dcbnl_tc_param_nest);
601 if (ret)
602 goto err_pg;
603
604 param_nest = nla_nest_start(skb, i);
605 if (!param_nest)
606 goto err_pg;
607
608 pgid = DCB_ATTR_VALUE_UNDEFINED;
609 prio = DCB_ATTR_VALUE_UNDEFINED;
610 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
611 up_map = DCB_ATTR_VALUE_UNDEFINED;
612
613 if (dir) {
614 /* Rx */
615 netdev->dcbnl_ops->getpgtccfgrx(netdev,
616 i - DCB_PG_ATTR_TC_0, &prio,
617 &pgid, &tc_pct, &up_map);
618 } else {
619 /* Tx */
620 netdev->dcbnl_ops->getpgtccfgtx(netdev,
621 i - DCB_PG_ATTR_TC_0, &prio,
622 &pgid, &tc_pct, &up_map);
623 }
624
625 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
626 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
627 ret = nla_put_u8(skb,
628 DCB_TC_ATTR_PARAM_PGID, pgid);
629 if (ret)
630 goto err_param;
631 }
632 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
633 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
634 ret = nla_put_u8(skb,
635 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
636 if (ret)
637 goto err_param;
638 }
639 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
640 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
641 ret = nla_put_u8(skb,
642 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
643 if (ret)
644 goto err_param;
645 }
646 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
647 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
648 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
649 tc_pct);
650 if (ret)
651 goto err_param;
652 }
653 nla_nest_end(skb, param_nest);
654 }
655
656 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
657 getall = 1;
658 else
659 getall = 0;
660
661 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
662 if (!getall && !pg_tb[i])
663 continue;
664
665 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
666
667 if (dir) {
668 /* Rx */
669 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
670 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
671 } else {
672 /* Tx */
673 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
674 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
675 }
676 ret = nla_put_u8(skb, i, tc_pct);
677 if (ret)
678 goto err_pg;
679 }
680
681 nla_nest_end(skb, pg_nest);
682
683 return 0;
684
685 err_param:
686 nla_nest_cancel(skb, param_nest);
687 err_pg:
688 nla_nest_cancel(skb, pg_nest);
689
690 return -EMSGSIZE;
691 }
692
693 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
694 u32 seq, struct nlattr **tb, struct sk_buff *skb)
695 {
696 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
697 }
698
699 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
700 u32 seq, struct nlattr **tb, struct sk_buff *skb)
701 {
702 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
703 }
704
705 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
706 u32 seq, struct nlattr **tb, struct sk_buff *skb)
707 {
708 u8 value;
709
710 if (!tb[DCB_ATTR_STATE])
711 return -EINVAL;
712
713 if (!netdev->dcbnl_ops->setstate)
714 return -EOPNOTSUPP;
715
716 value = nla_get_u8(tb[DCB_ATTR_STATE]);
717
718 return nla_put_u8(skb, DCB_ATTR_STATE,
719 netdev->dcbnl_ops->setstate(netdev, value));
720 }
721
722 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
723 u32 seq, struct nlattr **tb, struct sk_buff *skb)
724 {
725 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
726 int i;
727 int ret;
728 u8 value;
729
730 if (!tb[DCB_ATTR_PFC_CFG])
731 return -EINVAL;
732
733 if (!netdev->dcbnl_ops->setpfccfg)
734 return -EOPNOTSUPP;
735
736 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
737 tb[DCB_ATTR_PFC_CFG],
738 dcbnl_pfc_up_nest);
739 if (ret)
740 return ret;
741
742 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
743 if (data[i] == NULL)
744 continue;
745 value = nla_get_u8(data[i]);
746 netdev->dcbnl_ops->setpfccfg(netdev,
747 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
748 }
749
750 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
751 }
752
753 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
754 u32 seq, struct nlattr **tb, struct sk_buff *skb)
755 {
756 int ret;
757
758 if (!tb[DCB_ATTR_SET_ALL])
759 return -EINVAL;
760
761 if (!netdev->dcbnl_ops->setall)
762 return -EOPNOTSUPP;
763
764 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
765 netdev->dcbnl_ops->setall(netdev));
766 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
767
768 return ret;
769 }
770
771 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
772 u32 seq, struct nlattr **tb, struct sk_buff *skb,
773 int dir)
774 {
775 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
776 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
777 int ret;
778 int i;
779 u8 pgid;
780 u8 up_map;
781 u8 prio;
782 u8 tc_pct;
783
784 if (!tb[DCB_ATTR_PG_CFG])
785 return -EINVAL;
786
787 if (!netdev->dcbnl_ops->setpgtccfgtx ||
788 !netdev->dcbnl_ops->setpgtccfgrx ||
789 !netdev->dcbnl_ops->setpgbwgcfgtx ||
790 !netdev->dcbnl_ops->setpgbwgcfgrx)
791 return -EOPNOTSUPP;
792
793 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
794 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
795 if (ret)
796 return ret;
797
798 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
799 if (!pg_tb[i])
800 continue;
801
802 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
803 pg_tb[i], dcbnl_tc_param_nest);
804 if (ret)
805 return ret;
806
807 pgid = DCB_ATTR_VALUE_UNDEFINED;
808 prio = DCB_ATTR_VALUE_UNDEFINED;
809 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
810 up_map = DCB_ATTR_VALUE_UNDEFINED;
811
812 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
813 prio =
814 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
815
816 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
817 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
818
819 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
820 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
821
822 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
823 up_map =
824 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
825
826 /* dir: Tx = 0, Rx = 1 */
827 if (dir) {
828 /* Rx */
829 netdev->dcbnl_ops->setpgtccfgrx(netdev,
830 i - DCB_PG_ATTR_TC_0,
831 prio, pgid, tc_pct, up_map);
832 } else {
833 /* Tx */
834 netdev->dcbnl_ops->setpgtccfgtx(netdev,
835 i - DCB_PG_ATTR_TC_0,
836 prio, pgid, tc_pct, up_map);
837 }
838 }
839
840 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
841 if (!pg_tb[i])
842 continue;
843
844 tc_pct = nla_get_u8(pg_tb[i]);
845
846 /* dir: Tx = 0, Rx = 1 */
847 if (dir) {
848 /* Rx */
849 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
850 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
851 } else {
852 /* Tx */
853 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
854 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
855 }
856 }
857
858 return nla_put_u8(skb,
859 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG), 0);
860 }
861
862 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
863 u32 seq, struct nlattr **tb, struct sk_buff *skb)
864 {
865 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
866 }
867
868 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
869 u32 seq, struct nlattr **tb, struct sk_buff *skb)
870 {
871 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
872 }
873
874 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
875 u32 seq, struct nlattr **tb, struct sk_buff *skb)
876 {
877 struct nlattr *bcn_nest;
878 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
879 u8 value_byte;
880 u32 value_integer;
881 int ret;
882 bool getall = false;
883 int i;
884
885 if (!tb[DCB_ATTR_BCN])
886 return -EINVAL;
887
888 if (!netdev->dcbnl_ops->getbcnrp ||
889 !netdev->dcbnl_ops->getbcncfg)
890 return -EOPNOTSUPP;
891
892 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
893 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
894 if (ret)
895 return ret;
896
897 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
898 if (!bcn_nest)
899 return -EMSGSIZE;
900
901 if (bcn_tb[DCB_BCN_ATTR_ALL])
902 getall = true;
903
904 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
905 if (!getall && !bcn_tb[i])
906 continue;
907
908 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
909 &value_byte);
910 ret = nla_put_u8(skb, i, value_byte);
911 if (ret)
912 goto err_bcn;
913 }
914
915 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
916 if (!getall && !bcn_tb[i])
917 continue;
918
919 netdev->dcbnl_ops->getbcncfg(netdev, i,
920 &value_integer);
921 ret = nla_put_u32(skb, i, value_integer);
922 if (ret)
923 goto err_bcn;
924 }
925
926 nla_nest_end(skb, bcn_nest);
927
928 return 0;
929
930 err_bcn:
931 nla_nest_cancel(skb, bcn_nest);
932 return ret;
933 }
934
935 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
936 u32 seq, struct nlattr **tb, struct sk_buff *skb)
937 {
938 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
939 int i;
940 int ret;
941 u8 value_byte;
942 u32 value_int;
943
944 if (!tb[DCB_ATTR_BCN])
945 return -EINVAL;
946
947 if (!netdev->dcbnl_ops->setbcncfg ||
948 !netdev->dcbnl_ops->setbcnrp)
949 return -EOPNOTSUPP;
950
951 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
952 tb[DCB_ATTR_BCN],
953 dcbnl_pfc_up_nest);
954 if (ret)
955 return ret;
956
957 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
958 if (data[i] == NULL)
959 continue;
960 value_byte = nla_get_u8(data[i]);
961 netdev->dcbnl_ops->setbcnrp(netdev,
962 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
963 }
964
965 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
966 if (data[i] == NULL)
967 continue;
968 value_int = nla_get_u32(data[i]);
969 netdev->dcbnl_ops->setbcncfg(netdev,
970 i, value_int);
971 }
972
973 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
974 }
975
976 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
977 int app_nested_type, int app_info_type,
978 int app_entry_type)
979 {
980 struct dcb_peer_app_info info;
981 struct dcb_app *table = NULL;
982 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
983 u16 app_count;
984 int err;
985
986
987 /**
988 * retrieve the peer app configuration form the driver. If the driver
989 * handlers fail exit without doing anything
990 */
991 err = ops->peer_getappinfo(netdev, &info, &app_count);
992 if (!err && app_count) {
993 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
994 if (!table)
995 return -ENOMEM;
996
997 err = ops->peer_getapptable(netdev, table);
998 }
999
1000 if (!err) {
1001 u16 i;
1002 struct nlattr *app;
1003
1004 /**
1005 * build the message, from here on the only possible failure
1006 * is due to the skb size
1007 */
1008 err = -EMSGSIZE;
1009
1010 app = nla_nest_start(skb, app_nested_type);
1011 if (!app)
1012 goto nla_put_failure;
1013
1014 if (app_info_type &&
1015 nla_put(skb, app_info_type, sizeof(info), &info))
1016 goto nla_put_failure;
1017
1018 for (i = 0; i < app_count; i++) {
1019 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1020 &table[i]))
1021 goto nla_put_failure;
1022 }
1023 nla_nest_end(skb, app);
1024 }
1025 err = 0;
1026
1027 nla_put_failure:
1028 kfree(table);
1029 return err;
1030 }
1031
1032 /* Handle IEEE 802.1Qaz GET commands. */
1033 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1034 {
1035 struct nlattr *ieee, *app;
1036 struct dcb_app_type *itr;
1037 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1038 int dcbx;
1039 int err;
1040
1041 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1042 return -EMSGSIZE;
1043
1044 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1045 if (!ieee)
1046 return -EMSGSIZE;
1047
1048 if (ops->ieee_getets) {
1049 struct ieee_ets ets;
1050 err = ops->ieee_getets(netdev, &ets);
1051 if (!err &&
1052 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1053 return -EMSGSIZE;
1054 }
1055
1056 if (ops->ieee_getmaxrate) {
1057 struct ieee_maxrate maxrate;
1058 err = ops->ieee_getmaxrate(netdev, &maxrate);
1059 if (!err) {
1060 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1061 sizeof(maxrate), &maxrate);
1062 if (err)
1063 return -EMSGSIZE;
1064 }
1065 }
1066
1067 if (ops->ieee_getpfc) {
1068 struct ieee_pfc pfc;
1069 err = ops->ieee_getpfc(netdev, &pfc);
1070 if (!err &&
1071 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1072 return -EMSGSIZE;
1073 }
1074
1075 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1076 if (!app)
1077 return -EMSGSIZE;
1078
1079 spin_lock(&dcb_lock);
1080 list_for_each_entry(itr, &dcb_app_list, list) {
1081 if (itr->ifindex == netdev->ifindex) {
1082 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1083 &itr->app);
1084 if (err) {
1085 spin_unlock(&dcb_lock);
1086 return -EMSGSIZE;
1087 }
1088 }
1089 }
1090
1091 if (netdev->dcbnl_ops->getdcbx)
1092 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1093 else
1094 dcbx = -EOPNOTSUPP;
1095
1096 spin_unlock(&dcb_lock);
1097 nla_nest_end(skb, app);
1098
1099 /* get peer info if available */
1100 if (ops->ieee_peer_getets) {
1101 struct ieee_ets 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 err = ops->ieee_peer_getpfc(netdev, &pfc);
1111 if (!err &&
1112 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1113 return -EMSGSIZE;
1114 }
1115
1116 if (ops->peer_getappinfo && ops->peer_getapptable) {
1117 err = dcbnl_build_peer_app(netdev, skb,
1118 DCB_ATTR_IEEE_PEER_APP,
1119 DCB_ATTR_IEEE_APP_UNSPEC,
1120 DCB_ATTR_IEEE_APP);
1121 if (err)
1122 return -EMSGSIZE;
1123 }
1124
1125 nla_nest_end(skb, ieee);
1126 if (dcbx >= 0) {
1127 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1128 if (err)
1129 return -EMSGSIZE;
1130 }
1131
1132 return 0;
1133 }
1134
1135 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1136 int dir)
1137 {
1138 u8 pgid, up_map, prio, tc_pct;
1139 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1140 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1141 struct nlattr *pg = nla_nest_start(skb, i);
1142
1143 if (!pg)
1144 return -EMSGSIZE;
1145
1146 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1147 struct nlattr *tc_nest = nla_nest_start(skb, i);
1148
1149 if (!tc_nest)
1150 return -EMSGSIZE;
1151
1152 pgid = DCB_ATTR_VALUE_UNDEFINED;
1153 prio = DCB_ATTR_VALUE_UNDEFINED;
1154 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1155 up_map = DCB_ATTR_VALUE_UNDEFINED;
1156
1157 if (!dir)
1158 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1159 &prio, &pgid, &tc_pct, &up_map);
1160 else
1161 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1162 &prio, &pgid, &tc_pct, &up_map);
1163
1164 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1165 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1166 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1167 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1168 return -EMSGSIZE;
1169 nla_nest_end(skb, tc_nest);
1170 }
1171
1172 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1173 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1174
1175 if (!dir)
1176 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1177 &tc_pct);
1178 else
1179 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1180 &tc_pct);
1181 if (nla_put_u8(skb, i, tc_pct))
1182 return -EMSGSIZE;
1183 }
1184 nla_nest_end(skb, pg);
1185 return 0;
1186 }
1187
1188 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1189 {
1190 struct nlattr *cee, *app;
1191 struct dcb_app_type *itr;
1192 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1193 int dcbx, i, err = -EMSGSIZE;
1194 u8 value;
1195
1196 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1197 goto nla_put_failure;
1198 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1199 if (!cee)
1200 goto nla_put_failure;
1201
1202 /* local pg */
1203 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1204 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1205 if (err)
1206 goto nla_put_failure;
1207 }
1208
1209 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1210 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1211 if (err)
1212 goto nla_put_failure;
1213 }
1214
1215 /* local pfc */
1216 if (ops->getpfccfg) {
1217 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1218
1219 if (!pfc_nest)
1220 goto nla_put_failure;
1221
1222 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1223 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1224 if (nla_put_u8(skb, i, value))
1225 goto nla_put_failure;
1226 }
1227 nla_nest_end(skb, pfc_nest);
1228 }
1229
1230 /* local app */
1231 spin_lock(&dcb_lock);
1232 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1233 if (!app)
1234 goto dcb_unlock;
1235
1236 list_for_each_entry(itr, &dcb_app_list, list) {
1237 if (itr->ifindex == netdev->ifindex) {
1238 struct nlattr *app_nest = nla_nest_start(skb,
1239 DCB_ATTR_APP);
1240 if (!app_nest)
1241 goto dcb_unlock;
1242
1243 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1244 itr->app.selector);
1245 if (err)
1246 goto dcb_unlock;
1247
1248 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1249 itr->app.protocol);
1250 if (err)
1251 goto dcb_unlock;
1252
1253 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1254 itr->app.priority);
1255 if (err)
1256 goto dcb_unlock;
1257
1258 nla_nest_end(skb, app_nest);
1259 }
1260 }
1261 nla_nest_end(skb, app);
1262
1263 if (netdev->dcbnl_ops->getdcbx)
1264 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1265 else
1266 dcbx = -EOPNOTSUPP;
1267
1268 spin_unlock(&dcb_lock);
1269
1270 /* features flags */
1271 if (ops->getfeatcfg) {
1272 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1273 if (!feat)
1274 goto nla_put_failure;
1275
1276 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1277 i++)
1278 if (!ops->getfeatcfg(netdev, i, &value) &&
1279 nla_put_u8(skb, i, value))
1280 goto nla_put_failure;
1281
1282 nla_nest_end(skb, feat);
1283 }
1284
1285 /* peer info if available */
1286 if (ops->cee_peer_getpg) {
1287 struct cee_pg pg;
1288 err = ops->cee_peer_getpg(netdev, &pg);
1289 if (!err &&
1290 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1291 goto nla_put_failure;
1292 }
1293
1294 if (ops->cee_peer_getpfc) {
1295 struct cee_pfc pfc;
1296 err = ops->cee_peer_getpfc(netdev, &pfc);
1297 if (!err &&
1298 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1299 goto nla_put_failure;
1300 }
1301
1302 if (ops->peer_getappinfo && ops->peer_getapptable) {
1303 err = dcbnl_build_peer_app(netdev, skb,
1304 DCB_ATTR_CEE_PEER_APP_TABLE,
1305 DCB_ATTR_CEE_PEER_APP_INFO,
1306 DCB_ATTR_CEE_PEER_APP);
1307 if (err)
1308 goto nla_put_failure;
1309 }
1310 nla_nest_end(skb, cee);
1311
1312 /* DCBX state */
1313 if (dcbx >= 0) {
1314 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1315 if (err)
1316 goto nla_put_failure;
1317 }
1318 return 0;
1319
1320 dcb_unlock:
1321 spin_unlock(&dcb_lock);
1322 nla_put_failure:
1323 return err;
1324 }
1325
1326 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1327 u32 seq, u32 pid, int dcbx_ver)
1328 {
1329 struct net *net = dev_net(dev);
1330 struct sk_buff *skb;
1331 struct nlmsghdr *nlh;
1332 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1333 int err;
1334
1335 if (!ops)
1336 return -EOPNOTSUPP;
1337
1338 skb = dcbnl_newmsg(event, cmd, pid, seq, 0, &nlh);
1339 if (!skb)
1340 return -ENOBUFS;
1341
1342 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1343 err = dcbnl_ieee_fill(skb, dev);
1344 else
1345 err = dcbnl_cee_fill(skb, dev);
1346
1347 if (err < 0) {
1348 /* Report error to broadcast listeners */
1349 nlmsg_free(skb);
1350 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1351 } else {
1352 /* End nlmsg and notify broadcast listeners */
1353 nlmsg_end(skb, nlh);
1354 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1355 }
1356
1357 return err;
1358 }
1359
1360 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1361 u32 seq, u32 pid)
1362 {
1363 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_IEEE);
1364 }
1365 EXPORT_SYMBOL(dcbnl_ieee_notify);
1366
1367 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1368 u32 seq, u32 pid)
1369 {
1370 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_CEE);
1371 }
1372 EXPORT_SYMBOL(dcbnl_cee_notify);
1373
1374 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1375 * be completed the entire msg is aborted and error value is returned.
1376 * No attempt is made to reconcile the case where only part of the
1377 * cmd can be completed.
1378 */
1379 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1380 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1381 {
1382 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1383 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1384 int err;
1385
1386 if (!ops)
1387 return -EOPNOTSUPP;
1388
1389 if (!tb[DCB_ATTR_IEEE])
1390 return -EINVAL;
1391
1392 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1393 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1394 if (err)
1395 return err;
1396
1397 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1398 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1399 err = ops->ieee_setets(netdev, ets);
1400 if (err)
1401 goto err;
1402 }
1403
1404 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1405 struct ieee_maxrate *maxrate =
1406 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1407 err = ops->ieee_setmaxrate(netdev, maxrate);
1408 if (err)
1409 goto err;
1410 }
1411
1412 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1413 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1414 err = ops->ieee_setpfc(netdev, pfc);
1415 if (err)
1416 goto err;
1417 }
1418
1419 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1420 struct nlattr *attr;
1421 int rem;
1422
1423 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1424 struct dcb_app *app_data;
1425 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1426 continue;
1427 app_data = nla_data(attr);
1428 if (ops->ieee_setapp)
1429 err = ops->ieee_setapp(netdev, app_data);
1430 else
1431 err = dcb_ieee_setapp(netdev, app_data);
1432 if (err)
1433 goto err;
1434 }
1435 }
1436
1437 err:
1438 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1439 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1440 return err;
1441 }
1442
1443 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1444 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1445 {
1446 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1447
1448 if (!ops)
1449 return -EOPNOTSUPP;
1450
1451 return dcbnl_ieee_fill(skb, netdev);
1452 }
1453
1454 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1455 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1456 {
1457 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1458 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1459 int err;
1460
1461 if (!ops)
1462 return -EOPNOTSUPP;
1463
1464 if (!tb[DCB_ATTR_IEEE])
1465 return -EINVAL;
1466
1467 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1468 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1469 if (err)
1470 return err;
1471
1472 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1473 struct nlattr *attr;
1474 int rem;
1475
1476 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1477 struct dcb_app *app_data;
1478
1479 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1480 continue;
1481 app_data = nla_data(attr);
1482 if (ops->ieee_delapp)
1483 err = ops->ieee_delapp(netdev, app_data);
1484 else
1485 err = dcb_ieee_delapp(netdev, app_data);
1486 if (err)
1487 goto err;
1488 }
1489 }
1490
1491 err:
1492 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1493 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1494 return err;
1495 }
1496
1497
1498 /* DCBX configuration */
1499 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1500 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1501 {
1502 if (!netdev->dcbnl_ops->getdcbx)
1503 return -EOPNOTSUPP;
1504
1505 return nla_put_u8(skb, DCB_ATTR_DCBX,
1506 netdev->dcbnl_ops->getdcbx(netdev));
1507 }
1508
1509 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1510 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1511 {
1512 u8 value;
1513
1514 if (!netdev->dcbnl_ops->setdcbx)
1515 return -EOPNOTSUPP;
1516
1517 if (!tb[DCB_ATTR_DCBX])
1518 return -EINVAL;
1519
1520 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1521
1522 return nla_put_u8(skb, DCB_ATTR_DCBX,
1523 netdev->dcbnl_ops->setdcbx(netdev, value));
1524 }
1525
1526 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1527 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1528 {
1529 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1530 u8 value;
1531 int ret, i;
1532 int getall = 0;
1533
1534 if (!netdev->dcbnl_ops->getfeatcfg)
1535 return -EOPNOTSUPP;
1536
1537 if (!tb[DCB_ATTR_FEATCFG])
1538 return -EINVAL;
1539
1540 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1541 dcbnl_featcfg_nest);
1542 if (ret)
1543 return ret;
1544
1545 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1546 if (!nest)
1547 return -EMSGSIZE;
1548
1549 if (data[DCB_FEATCFG_ATTR_ALL])
1550 getall = 1;
1551
1552 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1553 if (!getall && !data[i])
1554 continue;
1555
1556 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1557 if (!ret)
1558 ret = nla_put_u8(skb, i, value);
1559
1560 if (ret) {
1561 nla_nest_cancel(skb, nest);
1562 goto nla_put_failure;
1563 }
1564 }
1565 nla_nest_end(skb, nest);
1566
1567 nla_put_failure:
1568 return ret;
1569 }
1570
1571 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1572 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1573 {
1574 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1575 int ret, i;
1576 u8 value;
1577
1578 if (!netdev->dcbnl_ops->setfeatcfg)
1579 return -ENOTSUPP;
1580
1581 if (!tb[DCB_ATTR_FEATCFG])
1582 return -EINVAL;
1583
1584 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1585 dcbnl_featcfg_nest);
1586
1587 if (ret)
1588 goto err;
1589
1590 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1591 if (data[i] == NULL)
1592 continue;
1593
1594 value = nla_get_u8(data[i]);
1595
1596 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1597
1598 if (ret)
1599 goto err;
1600 }
1601 err:
1602 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1603
1604 return ret;
1605 }
1606
1607 /* Handle CEE DCBX GET commands. */
1608 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1609 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1610 {
1611 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1612
1613 if (!ops)
1614 return -EOPNOTSUPP;
1615
1616 return dcbnl_cee_fill(skb, netdev);
1617 }
1618
1619 struct reply_func {
1620 /* reply netlink message type */
1621 int type;
1622
1623 /* function to fill message contents */
1624 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1625 struct nlattr **, struct sk_buff *);
1626 };
1627
1628 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1629 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1630 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1631 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1632 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1633 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1634 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1635 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1636 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1637 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1638 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1639 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1640 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1641 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1642 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1643 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1644 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1645 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1646 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1647 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1648 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1649 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1650 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1651 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1652 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1653 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1654 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1655 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
1656 };
1657
1658 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1659 {
1660 struct net *net = sock_net(skb->sk);
1661 struct net_device *netdev;
1662 struct dcbmsg *dcb = nlmsg_data(nlh);
1663 struct nlattr *tb[DCB_ATTR_MAX + 1];
1664 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1665 int ret = -EINVAL;
1666 struct sk_buff *reply_skb;
1667 struct nlmsghdr *reply_nlh = NULL;
1668 const struct reply_func *fn;
1669
1670 if (!net_eq(net, &init_net))
1671 return -EINVAL;
1672
1673 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1674 dcbnl_rtnl_policy);
1675 if (ret < 0)
1676 return ret;
1677
1678 if (dcb->cmd > DCB_CMD_MAX)
1679 return -EINVAL;
1680
1681 /* check if a reply function has been defined for the command */
1682 fn = &reply_funcs[dcb->cmd];
1683 if (!fn->cb)
1684 return -EOPNOTSUPP;
1685
1686 if (!tb[DCB_ATTR_IFNAME])
1687 return -EINVAL;
1688
1689 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1690 if (!netdev)
1691 return -ENODEV;
1692
1693 if (!netdev->dcbnl_ops) {
1694 ret = -EOPNOTSUPP;
1695 goto out;
1696 }
1697
1698 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, pid, nlh->nlmsg_seq,
1699 nlh->nlmsg_flags, &reply_nlh);
1700 if (!reply_skb) {
1701 ret = -ENOBUFS;
1702 goto out;
1703 }
1704
1705 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1706 if (ret < 0) {
1707 nlmsg_free(reply_skb);
1708 goto out;
1709 }
1710
1711 nlmsg_end(reply_skb, reply_nlh);
1712
1713 ret = rtnl_unicast(reply_skb, &init_net, pid);
1714 out:
1715 dev_put(netdev);
1716 return ret;
1717 }
1718
1719 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1720 int ifindex, int prio)
1721 {
1722 struct dcb_app_type *itr;
1723
1724 list_for_each_entry(itr, &dcb_app_list, list) {
1725 if (itr->app.selector == app->selector &&
1726 itr->app.protocol == app->protocol &&
1727 itr->ifindex == ifindex &&
1728 (!prio || itr->app.priority == prio))
1729 return itr;
1730 }
1731
1732 return NULL;
1733 }
1734
1735 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1736 {
1737 struct dcb_app_type *entry;
1738
1739 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1740 if (!entry)
1741 return -ENOMEM;
1742
1743 memcpy(&entry->app, app, sizeof(*app));
1744 entry->ifindex = ifindex;
1745 list_add(&entry->list, &dcb_app_list);
1746
1747 return 0;
1748 }
1749
1750 /**
1751 * dcb_getapp - retrieve the DCBX application user priority
1752 *
1753 * On success returns a non-zero 802.1p user priority bitmap
1754 * otherwise returns 0 as the invalid user priority bitmap to
1755 * indicate an error.
1756 */
1757 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1758 {
1759 struct dcb_app_type *itr;
1760 u8 prio = 0;
1761
1762 spin_lock(&dcb_lock);
1763 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1764 prio = itr->app.priority;
1765 spin_unlock(&dcb_lock);
1766
1767 return prio;
1768 }
1769 EXPORT_SYMBOL(dcb_getapp);
1770
1771 /**
1772 * dcb_setapp - add CEE dcb application data to app list
1773 *
1774 * Priority 0 is an invalid priority in CEE spec. This routine
1775 * removes applications from the app list if the priority is
1776 * set to zero.
1777 */
1778 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1779 {
1780 struct dcb_app_type *itr;
1781 struct dcb_app_type event;
1782 int err = 0;
1783
1784 event.ifindex = dev->ifindex;
1785 memcpy(&event.app, new, sizeof(event.app));
1786 if (dev->dcbnl_ops->getdcbx)
1787 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1788
1789 spin_lock(&dcb_lock);
1790 /* Search for existing match and replace */
1791 if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1792 if (new->priority)
1793 itr->app.priority = new->priority;
1794 else {
1795 list_del(&itr->list);
1796 kfree(itr);
1797 }
1798 goto out;
1799 }
1800 /* App type does not exist add new application type */
1801 if (new->priority)
1802 err = dcb_app_add(new, dev->ifindex);
1803 out:
1804 spin_unlock(&dcb_lock);
1805 if (!err)
1806 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1807 return err;
1808 }
1809 EXPORT_SYMBOL(dcb_setapp);
1810
1811 /**
1812 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1813 *
1814 * Helper routine which on success returns a non-zero 802.1Qaz user
1815 * priority bitmap otherwise returns 0 to indicate the dcb_app was
1816 * not found in APP list.
1817 */
1818 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1819 {
1820 struct dcb_app_type *itr;
1821 u8 prio = 0;
1822
1823 spin_lock(&dcb_lock);
1824 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1825 prio |= 1 << itr->app.priority;
1826 spin_unlock(&dcb_lock);
1827
1828 return prio;
1829 }
1830 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1831
1832 /**
1833 * dcb_ieee_setapp - add IEEE dcb application data to app list
1834 *
1835 * This adds Application data to the list. Multiple application
1836 * entries may exists for the same selector and protocol as long
1837 * as the priorities are different.
1838 */
1839 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1840 {
1841 struct dcb_app_type event;
1842 int err = 0;
1843
1844 event.ifindex = dev->ifindex;
1845 memcpy(&event.app, new, sizeof(event.app));
1846 if (dev->dcbnl_ops->getdcbx)
1847 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1848
1849 spin_lock(&dcb_lock);
1850 /* Search for existing match and abort if found */
1851 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1852 err = -EEXIST;
1853 goto out;
1854 }
1855
1856 err = dcb_app_add(new, dev->ifindex);
1857 out:
1858 spin_unlock(&dcb_lock);
1859 if (!err)
1860 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1861 return err;
1862 }
1863 EXPORT_SYMBOL(dcb_ieee_setapp);
1864
1865 /**
1866 * dcb_ieee_delapp - delete IEEE dcb application data from list
1867 *
1868 * This removes a matching APP data from the APP list
1869 */
1870 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1871 {
1872 struct dcb_app_type *itr;
1873 struct dcb_app_type event;
1874 int err = -ENOENT;
1875
1876 event.ifindex = dev->ifindex;
1877 memcpy(&event.app, del, sizeof(event.app));
1878 if (dev->dcbnl_ops->getdcbx)
1879 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1880
1881 spin_lock(&dcb_lock);
1882 /* Search for existing match and remove it. */
1883 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1884 list_del(&itr->list);
1885 kfree(itr);
1886 err = 0;
1887 }
1888
1889 spin_unlock(&dcb_lock);
1890 if (!err)
1891 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1892 return err;
1893 }
1894 EXPORT_SYMBOL(dcb_ieee_delapp);
1895
1896 static void dcb_flushapp(void)
1897 {
1898 struct dcb_app_type *app;
1899 struct dcb_app_type *tmp;
1900
1901 spin_lock(&dcb_lock);
1902 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1903 list_del(&app->list);
1904 kfree(app);
1905 }
1906 spin_unlock(&dcb_lock);
1907 }
1908
1909 static int __init dcbnl_init(void)
1910 {
1911 INIT_LIST_HEAD(&dcb_app_list);
1912
1913 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1914 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1915
1916 return 0;
1917 }
1918 module_init(dcbnl_init);
1919
1920 static void __exit dcbnl_exit(void)
1921 {
1922 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1923 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1924 dcb_flushapp();
1925 }
1926 module_exit(dcbnl_exit);
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