?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
vxlan: leave multicast group when vxlan device down
[linux-2.6/btrfs-unstable.git] / net / dcb / dcbnl.c
blob66fbe1948fb5d290a867a8517ffd0e70e85038e4
1 /*
2 * Copyright (c) 2008-2011, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, see <http://www.gnu.org/licenses/>.
15 *
16 * Author: Lucy Liu <lucy.liu@intel.com>
17 */
18
19 #include <linux/netdevice.h>
20 #include <linux/netlink.h>
21 #include <linux/slab.h>
22 #include <net/netlink.h>
23 #include <net/rtnetlink.h>
24 #include <linux/dcbnl.h>
25 #include <net/dcbevent.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/module.h>
28 #include <net/sock.h>
29
30 /* Data Center Bridging (DCB) is a collection of Ethernet enhancements
31 * intended to allow network traffic with differing requirements
32 * (highly reliable, no drops vs. best effort vs. low latency) to operate
33 * and co-exist on Ethernet. Current DCB features are:
34 *
35 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
36 * framework for assigning bandwidth guarantees to traffic classes.
37 *
38 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
39 * can work independently for each 802.1p priority.
40 *
41 * Congestion Notification - provides a mechanism for end-to-end congestion
42 * control for protocols which do not have built-in congestion management.
43 *
44 * More information about the emerging standards for these Ethernet features
45 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
46 *
47 * This file implements an rtnetlink interface to allow configuration of DCB
48 * features for capable devices.
49 */
50
51 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
52 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
53 MODULE_LICENSE("GPL");
54
55 /**************** DCB attribute policies *************************************/
56
57 /* DCB netlink attributes policy */
58 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
59 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
60 [DCB_ATTR_STATE] = {.type = NLA_U8},
61 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
62 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
63 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
64 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
65 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
66 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
67 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
68 [DCB_ATTR_APP] = {.type = NLA_NESTED},
69 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
70 [DCB_ATTR_DCBX] = {.type = NLA_U8},
71 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
72 };
73
74 /* DCB priority flow control to User Priority nested attributes */
75 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
76 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
85 };
86
87 /* DCB priority grouping nested attributes */
88 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
89 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
107 };
108
109 /* DCB traffic class nested attributes. */
110 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
111 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
112 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
113 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
116 };
117
118 /* DCB capabilities nested attributes. */
119 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
120 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
121 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
122 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
123 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
129 };
130
131 /* DCB capabilities nested attributes. */
132 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
133 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
134 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
135 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
136 };
137
138 /* DCB BCN nested attributes. */
139 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
140 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
141 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
149 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
150 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
151 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
165 };
166
167 /* DCB APP nested attributes. */
168 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
169 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
170 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
171 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
172 };
173
174 /* IEEE 802.1Qaz nested attributes. */
175 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
176 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
177 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
178 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
179 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
180 };
181
182 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
183 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
184 };
185
186 /* DCB number of traffic classes nested attributes. */
187 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
188 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
189 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
190 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
191 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
192 };
193
194 static LIST_HEAD(dcb_app_list);
195 static DEFINE_SPINLOCK(dcb_lock);
196
197 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
198 u32 flags, struct nlmsghdr **nlhp)
199 {
200 struct sk_buff *skb;
201 struct dcbmsg *dcb;
202 struct nlmsghdr *nlh;
203
204 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
205 if (!skb)
206 return NULL;
207
208 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
209 BUG_ON(!nlh);
210
211 dcb = nlmsg_data(nlh);
212 dcb->dcb_family = AF_UNSPEC;
213 dcb->cmd = cmd;
214 dcb->dcb_pad = 0;
215
216 if (nlhp)
217 *nlhp = nlh;
218
219 return skb;
220 }
221
222 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
223 u32 seq, struct nlattr **tb, struct sk_buff *skb)
224 {
225 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
226 if (!netdev->dcbnl_ops->getstate)
227 return -EOPNOTSUPP;
228
229 return nla_put_u8(skb, DCB_ATTR_STATE,
230 netdev->dcbnl_ops->getstate(netdev));
231 }
232
233 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
234 u32 seq, struct nlattr **tb, struct sk_buff *skb)
235 {
236 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
237 u8 value;
238 int ret;
239 int i;
240 int getall = 0;
241
242 if (!tb[DCB_ATTR_PFC_CFG])
243 return -EINVAL;
244
245 if (!netdev->dcbnl_ops->getpfccfg)
246 return -EOPNOTSUPP;
247
248 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
249 tb[DCB_ATTR_PFC_CFG],
250 dcbnl_pfc_up_nest);
251 if (ret)
252 return ret;
253
254 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
255 if (!nest)
256 return -EMSGSIZE;
257
258 if (data[DCB_PFC_UP_ATTR_ALL])
259 getall = 1;
260
261 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
262 if (!getall && !data[i])
263 continue;
264
265 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
266 &value);
267 ret = nla_put_u8(skb, i, value);
268 if (ret) {
269 nla_nest_cancel(skb, nest);
270 return ret;
271 }
272 }
273 nla_nest_end(skb, nest);
274
275 return 0;
276 }
277
278 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
279 u32 seq, struct nlattr **tb, struct sk_buff *skb)
280 {
281 u8 perm_addr[MAX_ADDR_LEN];
282
283 if (!netdev->dcbnl_ops->getpermhwaddr)
284 return -EOPNOTSUPP;
285
286 memset(perm_addr, 0, sizeof(perm_addr));
287 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
288
289 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
290 }
291
292 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
293 u32 seq, struct nlattr **tb, struct sk_buff *skb)
294 {
295 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
296 u8 value;
297 int ret;
298 int i;
299 int getall = 0;
300
301 if (!tb[DCB_ATTR_CAP])
302 return -EINVAL;
303
304 if (!netdev->dcbnl_ops->getcap)
305 return -EOPNOTSUPP;
306
307 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
308 dcbnl_cap_nest);
309 if (ret)
310 return ret;
311
312 nest = nla_nest_start(skb, DCB_ATTR_CAP);
313 if (!nest)
314 return -EMSGSIZE;
315
316 if (data[DCB_CAP_ATTR_ALL])
317 getall = 1;
318
319 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
320 if (!getall && !data[i])
321 continue;
322
323 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
324 ret = nla_put_u8(skb, i, value);
325 if (ret) {
326 nla_nest_cancel(skb, nest);
327 return ret;
328 }
329 }
330 }
331 nla_nest_end(skb, nest);
332
333 return 0;
334 }
335
336 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
337 u32 seq, struct nlattr **tb, struct sk_buff *skb)
338 {
339 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
340 u8 value;
341 int ret;
342 int i;
343 int getall = 0;
344
345 if (!tb[DCB_ATTR_NUMTCS])
346 return -EINVAL;
347
348 if (!netdev->dcbnl_ops->getnumtcs)
349 return -EOPNOTSUPP;
350
351 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
352 dcbnl_numtcs_nest);
353 if (ret)
354 return ret;
355
356 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
357 if (!nest)
358 return -EMSGSIZE;
359
360 if (data[DCB_NUMTCS_ATTR_ALL])
361 getall = 1;
362
363 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
364 if (!getall && !data[i])
365 continue;
366
367 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
368 if (!ret) {
369 ret = nla_put_u8(skb, i, value);
370 if (ret) {
371 nla_nest_cancel(skb, nest);
372 return ret;
373 }
374 } else
375 return -EINVAL;
376 }
377 nla_nest_end(skb, nest);
378
379 return 0;
380 }
381
382 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
383 u32 seq, struct nlattr **tb, struct sk_buff *skb)
384 {
385 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
386 int ret;
387 u8 value;
388 int i;
389
390 if (!tb[DCB_ATTR_NUMTCS])
391 return -EINVAL;
392
393 if (!netdev->dcbnl_ops->setnumtcs)
394 return -EOPNOTSUPP;
395
396 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
397 dcbnl_numtcs_nest);
398 if (ret)
399 return ret;
400
401 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
402 if (data[i] == NULL)
403 continue;
404
405 value = nla_get_u8(data[i]);
406
407 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
408 if (ret)
409 break;
410 }
411
412 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
413 }
414
415 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
416 u32 seq, struct nlattr **tb, struct sk_buff *skb)
417 {
418 if (!netdev->dcbnl_ops->getpfcstate)
419 return -EOPNOTSUPP;
420
421 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
422 netdev->dcbnl_ops->getpfcstate(netdev));
423 }
424
425 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
426 u32 seq, struct nlattr **tb, struct sk_buff *skb)
427 {
428 u8 value;
429
430 if (!tb[DCB_ATTR_PFC_STATE])
431 return -EINVAL;
432
433 if (!netdev->dcbnl_ops->setpfcstate)
434 return -EOPNOTSUPP;
435
436 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
437
438 netdev->dcbnl_ops->setpfcstate(netdev, value);
439
440 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
441 }
442
443 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
444 u32 seq, struct nlattr **tb, struct sk_buff *skb)
445 {
446 struct nlattr *app_nest;
447 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
448 u16 id;
449 u8 up, idtype;
450 int ret;
451
452 if (!tb[DCB_ATTR_APP])
453 return -EINVAL;
454
455 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
456 dcbnl_app_nest);
457 if (ret)
458 return ret;
459
460 /* all must be non-null */
461 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
462 (!app_tb[DCB_APP_ATTR_ID]))
463 return -EINVAL;
464
465 /* either by eth type or by socket number */
466 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
467 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
468 (idtype != DCB_APP_IDTYPE_PORTNUM))
469 return -EINVAL;
470
471 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
472
473 if (netdev->dcbnl_ops->getapp) {
474 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 memset(&ets, 0, sizeof(ets));
1046 err = ops->ieee_getets(netdev, &ets);
1047 if (!err &&
1048 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1049 return -EMSGSIZE;
1050 }
1051
1052 if (ops->ieee_getmaxrate) {
1053 struct ieee_maxrate maxrate;
1054 memset(&maxrate, 0, sizeof(maxrate));
1055 err = ops->ieee_getmaxrate(netdev, &maxrate);
1056 if (!err) {
1057 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1058 sizeof(maxrate), &maxrate);
1059 if (err)
1060 return -EMSGSIZE;
1061 }
1062 }
1063
1064 if (ops->ieee_getpfc) {
1065 struct ieee_pfc pfc;
1066 memset(&pfc, 0, sizeof(pfc));
1067 err = ops->ieee_getpfc(netdev, &pfc);
1068 if (!err &&
1069 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1070 return -EMSGSIZE;
1071 }
1072
1073 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1074 if (!app)
1075 return -EMSGSIZE;
1076
1077 spin_lock(&dcb_lock);
1078 list_for_each_entry(itr, &dcb_app_list, list) {
1079 if (itr->ifindex == netdev->ifindex) {
1080 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1081 &itr->app);
1082 if (err) {
1083 spin_unlock(&dcb_lock);
1084 return -EMSGSIZE;
1085 }
1086 }
1087 }
1088
1089 if (netdev->dcbnl_ops->getdcbx)
1090 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1091 else
1092 dcbx = -EOPNOTSUPP;
1093
1094 spin_unlock(&dcb_lock);
1095 nla_nest_end(skb, app);
1096
1097 /* get peer info if available */
1098 if (ops->ieee_peer_getets) {
1099 struct ieee_ets ets;
1100 memset(&ets, 0, sizeof(ets));
1101 err = ops->ieee_peer_getets(netdev, &ets);
1102 if (!err &&
1103 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1104 return -EMSGSIZE;
1105 }
1106
1107 if (ops->ieee_peer_getpfc) {
1108 struct ieee_pfc pfc;
1109 memset(&pfc, 0, sizeof(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 memset(&pg, 0, sizeof(pg));
1289 err = ops->cee_peer_getpg(netdev, &pg);
1290 if (!err &&
1291 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1292 goto nla_put_failure;
1293 }
1294
1295 if (ops->cee_peer_getpfc) {
1296 struct cee_pfc pfc;
1297 memset(&pfc, 0, sizeof(pfc));
1298 err = ops->cee_peer_getpfc(netdev, &pfc);
1299 if (!err &&
1300 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1301 goto nla_put_failure;
1302 }
1303
1304 if (ops->peer_getappinfo && ops->peer_getapptable) {
1305 err = dcbnl_build_peer_app(netdev, skb,
1306 DCB_ATTR_CEE_PEER_APP_TABLE,
1307 DCB_ATTR_CEE_PEER_APP_INFO,
1308 DCB_ATTR_CEE_PEER_APP);
1309 if (err)
1310 goto nla_put_failure;
1311 }
1312 nla_nest_end(skb, cee);
1313
1314 /* DCBX state */
1315 if (dcbx >= 0) {
1316 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1317 if (err)
1318 goto nla_put_failure;
1319 }
1320 return 0;
1321
1322 dcb_unlock:
1323 spin_unlock(&dcb_lock);
1324 nla_put_failure:
1325 return err;
1326 }
1327
1328 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1329 u32 seq, u32 portid, int dcbx_ver)
1330 {
1331 struct net *net = dev_net(dev);
1332 struct sk_buff *skb;
1333 struct nlmsghdr *nlh;
1334 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1335 int err;
1336
1337 if (!ops)
1338 return -EOPNOTSUPP;
1339
1340 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1341 if (!skb)
1342 return -ENOBUFS;
1343
1344 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1345 err = dcbnl_ieee_fill(skb, dev);
1346 else
1347 err = dcbnl_cee_fill(skb, dev);
1348
1349 if (err < 0) {
1350 /* Report error to broadcast listeners */
1351 nlmsg_free(skb);
1352 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1353 } else {
1354 /* End nlmsg and notify broadcast listeners */
1355 nlmsg_end(skb, nlh);
1356 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1357 }
1358
1359 return err;
1360 }
1361
1362 int dcbnl_ieee_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_IEEE);
1366 }
1367 EXPORT_SYMBOL(dcbnl_ieee_notify);
1368
1369 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1370 u32 seq, u32 portid)
1371 {
1372 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1373 }
1374 EXPORT_SYMBOL(dcbnl_cee_notify);
1375
1376 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1377 * be completed the entire msg is aborted and error value is returned.
1378 * No attempt is made to reconcile the case where only part of the
1379 * cmd can be completed.
1380 */
1381 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1382 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1383 {
1384 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1385 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1386 int err;
1387
1388 if (!ops)
1389 return -EOPNOTSUPP;
1390
1391 if (!tb[DCB_ATTR_IEEE])
1392 return -EINVAL;
1393
1394 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1395 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1396 if (err)
1397 return err;
1398
1399 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1400 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1401 err = ops->ieee_setets(netdev, ets);
1402 if (err)
1403 goto err;
1404 }
1405
1406 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1407 struct ieee_maxrate *maxrate =
1408 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1409 err = ops->ieee_setmaxrate(netdev, maxrate);
1410 if (err)
1411 goto err;
1412 }
1413
1414 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1415 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1416 err = ops->ieee_setpfc(netdev, pfc);
1417 if (err)
1418 goto err;
1419 }
1420
1421 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1422 struct nlattr *attr;
1423 int rem;
1424
1425 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1426 struct dcb_app *app_data;
1427 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1428 continue;
1429 app_data = nla_data(attr);
1430 if (ops->ieee_setapp)
1431 err = ops->ieee_setapp(netdev, app_data);
1432 else
1433 err = dcb_ieee_setapp(netdev, app_data);
1434 if (err)
1435 goto err;
1436 }
1437 }
1438
1439 err:
1440 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1441 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1442 return err;
1443 }
1444
1445 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1446 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1447 {
1448 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1449
1450 if (!ops)
1451 return -EOPNOTSUPP;
1452
1453 return dcbnl_ieee_fill(skb, netdev);
1454 }
1455
1456 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1457 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1458 {
1459 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1460 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1461 int err;
1462
1463 if (!ops)
1464 return -EOPNOTSUPP;
1465
1466 if (!tb[DCB_ATTR_IEEE])
1467 return -EINVAL;
1468
1469 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1470 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1471 if (err)
1472 return err;
1473
1474 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1475 struct nlattr *attr;
1476 int rem;
1477
1478 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1479 struct dcb_app *app_data;
1480
1481 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1482 continue;
1483 app_data = nla_data(attr);
1484 if (ops->ieee_delapp)
1485 err = ops->ieee_delapp(netdev, app_data);
1486 else
1487 err = dcb_ieee_delapp(netdev, app_data);
1488 if (err)
1489 goto err;
1490 }
1491 }
1492
1493 err:
1494 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1495 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1496 return err;
1497 }
1498
1499
1500 /* DCBX configuration */
1501 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1502 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1503 {
1504 if (!netdev->dcbnl_ops->getdcbx)
1505 return -EOPNOTSUPP;
1506
1507 return nla_put_u8(skb, DCB_ATTR_DCBX,
1508 netdev->dcbnl_ops->getdcbx(netdev));
1509 }
1510
1511 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1512 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1513 {
1514 u8 value;
1515
1516 if (!netdev->dcbnl_ops->setdcbx)
1517 return -EOPNOTSUPP;
1518
1519 if (!tb[DCB_ATTR_DCBX])
1520 return -EINVAL;
1521
1522 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1523
1524 return nla_put_u8(skb, DCB_ATTR_DCBX,
1525 netdev->dcbnl_ops->setdcbx(netdev, value));
1526 }
1527
1528 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1529 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1530 {
1531 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1532 u8 value;
1533 int ret, i;
1534 int getall = 0;
1535
1536 if (!netdev->dcbnl_ops->getfeatcfg)
1537 return -EOPNOTSUPP;
1538
1539 if (!tb[DCB_ATTR_FEATCFG])
1540 return -EINVAL;
1541
1542 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1543 dcbnl_featcfg_nest);
1544 if (ret)
1545 return ret;
1546
1547 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1548 if (!nest)
1549 return -EMSGSIZE;
1550
1551 if (data[DCB_FEATCFG_ATTR_ALL])
1552 getall = 1;
1553
1554 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1555 if (!getall && !data[i])
1556 continue;
1557
1558 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1559 if (!ret)
1560 ret = nla_put_u8(skb, i, value);
1561
1562 if (ret) {
1563 nla_nest_cancel(skb, nest);
1564 goto nla_put_failure;
1565 }
1566 }
1567 nla_nest_end(skb, nest);
1568
1569 nla_put_failure:
1570 return ret;
1571 }
1572
1573 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1574 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1575 {
1576 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1577 int ret, i;
1578 u8 value;
1579
1580 if (!netdev->dcbnl_ops->setfeatcfg)
1581 return -ENOTSUPP;
1582
1583 if (!tb[DCB_ATTR_FEATCFG])
1584 return -EINVAL;
1585
1586 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1587 dcbnl_featcfg_nest);
1588
1589 if (ret)
1590 goto err;
1591
1592 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1593 if (data[i] == NULL)
1594 continue;
1595
1596 value = nla_get_u8(data[i]);
1597
1598 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1599
1600 if (ret)
1601 goto err;
1602 }
1603 err:
1604 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1605
1606 return ret;
1607 }
1608
1609 /* Handle CEE DCBX GET commands. */
1610 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1611 u32 seq, struct nlattr **tb, struct sk_buff *skb)
1612 {
1613 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1614
1615 if (!ops)
1616 return -EOPNOTSUPP;
1617
1618 return dcbnl_cee_fill(skb, netdev);
1619 }
1620
1621 struct reply_func {
1622 /* reply netlink message type */
1623 int type;
1624
1625 /* function to fill message contents */
1626 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1627 struct nlattr **, struct sk_buff *);
1628 };
1629
1630 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1631 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1632 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1633 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1634 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1635 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1636 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1637 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1638 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1639 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1640 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1641 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1642 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1643 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1644 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1645 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1646 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1647 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1648 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1649 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1650 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1651 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1652 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1653 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1654 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1655 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1656 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1657 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
1658 };
1659
1660 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
1661 {
1662 struct net *net = sock_net(skb->sk);
1663 struct net_device *netdev;
1664 struct dcbmsg *dcb = nlmsg_data(nlh);
1665 struct nlattr *tb[DCB_ATTR_MAX + 1];
1666 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1667 int ret = -EINVAL;
1668 struct sk_buff *reply_skb;
1669 struct nlmsghdr *reply_nlh = NULL;
1670 const struct reply_func *fn;
1671
1672 if ((nlh->nlmsg_type == RTM_SETDCB) && !capable(CAP_NET_ADMIN))
1673 return -EPERM;
1674
1675 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1676 dcbnl_rtnl_policy);
1677 if (ret < 0)
1678 return ret;
1679
1680 if (dcb->cmd > DCB_CMD_MAX)
1681 return -EINVAL;
1682
1683 /* check if a reply function has been defined for the command */
1684 fn = &reply_funcs[dcb->cmd];
1685 if (!fn->cb)
1686 return -EOPNOTSUPP;
1687
1688 if (!tb[DCB_ATTR_IFNAME])
1689 return -EINVAL;
1690
1691 netdev = dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1692 if (!netdev)
1693 return -ENODEV;
1694
1695 if (!netdev->dcbnl_ops) {
1696 ret = -EOPNOTSUPP;
1697 goto out;
1698 }
1699
1700 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1701 nlh->nlmsg_flags, &reply_nlh);
1702 if (!reply_skb) {
1703 ret = -ENOBUFS;
1704 goto out;
1705 }
1706
1707 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1708 if (ret < 0) {
1709 nlmsg_free(reply_skb);
1710 goto out;
1711 }
1712
1713 nlmsg_end(reply_skb, reply_nlh);
1714
1715 ret = rtnl_unicast(reply_skb, net, portid);
1716 out:
1717 dev_put(netdev);
1718 return ret;
1719 }
1720
1721 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1722 int ifindex, int prio)
1723 {
1724 struct dcb_app_type *itr;
1725
1726 list_for_each_entry(itr, &dcb_app_list, list) {
1727 if (itr->app.selector == app->selector &&
1728 itr->app.protocol == app->protocol &&
1729 itr->ifindex == ifindex &&
1730 (!prio || itr->app.priority == prio))
1731 return itr;
1732 }
1733
1734 return NULL;
1735 }
1736
1737 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1738 {
1739 struct dcb_app_type *entry;
1740
1741 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1742 if (!entry)
1743 return -ENOMEM;
1744
1745 memcpy(&entry->app, app, sizeof(*app));
1746 entry->ifindex = ifindex;
1747 list_add(&entry->list, &dcb_app_list);
1748
1749 return 0;
1750 }
1751
1752 /**
1753 * dcb_getapp - retrieve the DCBX application user priority
1754 *
1755 * On success returns a non-zero 802.1p user priority bitmap
1756 * otherwise returns 0 as the invalid user priority bitmap to
1757 * indicate an error.
1758 */
1759 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1760 {
1761 struct dcb_app_type *itr;
1762 u8 prio = 0;
1763
1764 spin_lock(&dcb_lock);
1765 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1766 prio = itr->app.priority;
1767 spin_unlock(&dcb_lock);
1768
1769 return prio;
1770 }
1771 EXPORT_SYMBOL(dcb_getapp);
1772
1773 /**
1774 * dcb_setapp - add CEE dcb application data to app list
1775 *
1776 * Priority 0 is an invalid priority in CEE spec. This routine
1777 * removes applications from the app list if the priority is
1778 * set to zero.
1779 */
1780 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1781 {
1782 struct dcb_app_type *itr;
1783 struct dcb_app_type event;
1784 int err = 0;
1785
1786 event.ifindex = dev->ifindex;
1787 memcpy(&event.app, new, sizeof(event.app));
1788 if (dev->dcbnl_ops->getdcbx)
1789 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1790
1791 spin_lock(&dcb_lock);
1792 /* Search for existing match and replace */
1793 if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1794 if (new->priority)
1795 itr->app.priority = new->priority;
1796 else {
1797 list_del(&itr->list);
1798 kfree(itr);
1799 }
1800 goto out;
1801 }
1802 /* App type does not exist add new application type */
1803 if (new->priority)
1804 err = dcb_app_add(new, dev->ifindex);
1805 out:
1806 spin_unlock(&dcb_lock);
1807 if (!err)
1808 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1809 return err;
1810 }
1811 EXPORT_SYMBOL(dcb_setapp);
1812
1813 /**
1814 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1815 *
1816 * Helper routine which on success returns a non-zero 802.1Qaz user
1817 * priority bitmap otherwise returns 0 to indicate the dcb_app was
1818 * not found in APP list.
1819 */
1820 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1821 {
1822 struct dcb_app_type *itr;
1823 u8 prio = 0;
1824
1825 spin_lock(&dcb_lock);
1826 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1827 prio |= 1 << itr->app.priority;
1828 spin_unlock(&dcb_lock);
1829
1830 return prio;
1831 }
1832 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1833
1834 /**
1835 * dcb_ieee_setapp - add IEEE dcb application data to app list
1836 *
1837 * This adds Application data to the list. Multiple application
1838 * entries may exists for the same selector and protocol as long
1839 * as the priorities are different.
1840 */
1841 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1842 {
1843 struct dcb_app_type event;
1844 int err = 0;
1845
1846 event.ifindex = dev->ifindex;
1847 memcpy(&event.app, new, sizeof(event.app));
1848 if (dev->dcbnl_ops->getdcbx)
1849 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1850
1851 spin_lock(&dcb_lock);
1852 /* Search for existing match and abort if found */
1853 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1854 err = -EEXIST;
1855 goto out;
1856 }
1857
1858 err = dcb_app_add(new, dev->ifindex);
1859 out:
1860 spin_unlock(&dcb_lock);
1861 if (!err)
1862 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1863 return err;
1864 }
1865 EXPORT_SYMBOL(dcb_ieee_setapp);
1866
1867 /**
1868 * dcb_ieee_delapp - delete IEEE dcb application data from list
1869 *
1870 * This removes a matching APP data from the APP list
1871 */
1872 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1873 {
1874 struct dcb_app_type *itr;
1875 struct dcb_app_type event;
1876 int err = -ENOENT;
1877
1878 event.ifindex = dev->ifindex;
1879 memcpy(&event.app, del, sizeof(event.app));
1880 if (dev->dcbnl_ops->getdcbx)
1881 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1882
1883 spin_lock(&dcb_lock);
1884 /* Search for existing match and remove it. */
1885 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1886 list_del(&itr->list);
1887 kfree(itr);
1888 err = 0;
1889 }
1890
1891 spin_unlock(&dcb_lock);
1892 if (!err)
1893 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1894 return err;
1895 }
1896 EXPORT_SYMBOL(dcb_ieee_delapp);
1897
1898 static void dcb_flushapp(void)
1899 {
1900 struct dcb_app_type *app;
1901 struct dcb_app_type *tmp;
1902
1903 spin_lock(&dcb_lock);
1904 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1905 list_del(&app->list);
1906 kfree(app);
1907 }
1908 spin_unlock(&dcb_lock);
1909 }
1910
1911 static int __init dcbnl_init(void)
1912 {
1913 INIT_LIST_HEAD(&dcb_app_list);
1914
1915 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1916 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1917
1918 return 0;
1919 }
1920 module_init(dcbnl_init);
1921
1922 static void __exit dcbnl_exit(void)
1923 {
1924 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1925 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1926 dcb_flushapp();
1927 }
1928 module_exit(dcbnl_exit);
(deprecated) Btrfs devel tree