dcbnl: Add netlink attributes for setapp/getapp to dcbnl
[linux-2.6.git] / net / dcb / dcbnl.c
1 /*
2  * Copyright (c) 2008, 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 <net/netlink.h>
23 #include <net/rtnetlink.h>
24 #include <linux/dcbnl.h>
25 #include <linux/rtnetlink.h>
26 #include <net/sock.h>
27
28 /**
29  * Data Center Bridging (DCB) is a collection of Ethernet enhancements
30  * intended to allow network traffic with differing requirements
31  * (highly reliable, no drops vs. best effort vs. low latency) to operate
32  * and co-exist on Ethernet.  Current DCB features are:
33  *
34  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
35  *   framework for assigning bandwidth guarantees to traffic classes.
36  *
37  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
38  *   can work independently for each 802.1p priority.
39  *
40  * Congestion Notification - provides a mechanism for end-to-end congestion
41  *   control for protocols which do not have built-in congestion management.
42  *
43  * More information about the emerging standards for these Ethernet features
44  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
45  *
46  * This file implements an rtnetlink interface to allow configuration of DCB
47  * features for capable devices.
48  */
49
50 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
51 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
52 MODULE_LICENSE("GPL");
53
54 /**************** DCB attribute policies *************************************/
55
56 /* DCB netlink attributes policy */
57 static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
58         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
59         [DCB_ATTR_STATE]       = {.type = NLA_U8},
60         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
61         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
62         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
63         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
64         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
65         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
66         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
67         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
68 };
69
70 /* DCB priority flow control to User Priority nested attributes */
71 static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
72         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
73         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
74         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
75         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
76         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
77         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
78         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
79         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
80         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
81 };
82
83 /* DCB priority grouping nested attributes */
84 static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
85         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
86         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
87         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
88         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
89         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
90         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
91         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
92         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
93         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
94         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
95         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
96         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
97         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
98         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
99         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
100         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
101         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
102         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
103 };
104
105 /* DCB traffic class nested attributes. */
106 static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
107         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
108         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
109         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
110         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
111         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
112 };
113
114 /* DCB capabilities nested attributes. */
115 static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
116         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
117         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
118         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
119         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
120         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
121         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
122         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
123         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
124 };
125
126 /* DCB capabilities nested attributes. */
127 static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
128         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
129         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
130         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
131 };
132
133 /* DCB BCN nested attributes. */
134 static struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
135         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
136         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
137         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
138         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
139         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
140         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
141         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
142         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
143         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
144         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
145         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
146         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
147         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
148         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
149         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
150         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
151         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
152         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
153         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
154         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
155         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
156         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
157         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
158         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
159         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
160 };
161
162 /* DCB APP nested attributes. */
163 static struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
164         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
165         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
166         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
167 };
168
169 /* standard netlink reply call */
170 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
171                        u32 seq, u16 flags)
172 {
173         struct sk_buff *dcbnl_skb;
174         struct dcbmsg *dcb;
175         struct nlmsghdr *nlh;
176         int ret = -EINVAL;
177
178         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
179         if (!dcbnl_skb)
180                 return ret;
181
182         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
183
184         dcb = NLMSG_DATA(nlh);
185         dcb->dcb_family = AF_UNSPEC;
186         dcb->cmd = cmd;
187         dcb->dcb_pad = 0;
188
189         ret = nla_put_u8(dcbnl_skb, attr, value);
190         if (ret)
191                 goto err;
192
193         /* end the message, assign the nlmsg_len. */
194         nlmsg_end(dcbnl_skb, nlh);
195         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
196         if (ret)
197                 goto err;
198
199         return 0;
200 nlmsg_failure:
201 err:
202         kfree_skb(dcbnl_skb);
203         return ret;
204 }
205
206 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
207                           u32 pid, u32 seq, u16 flags)
208 {
209         int ret = -EINVAL;
210
211         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
212         if (!netdev->dcbnl_ops->getstate)
213                 return ret;
214
215         ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
216                           DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
217
218         return ret;
219 }
220
221 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
222                            u32 pid, u32 seq, u16 flags)
223 {
224         struct sk_buff *dcbnl_skb;
225         struct nlmsghdr *nlh;
226         struct dcbmsg *dcb;
227         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
228         u8 value;
229         int ret = -EINVAL;
230         int i;
231         int getall = 0;
232
233         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
234                 return ret;
235
236         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
237                                tb[DCB_ATTR_PFC_CFG],
238                                dcbnl_pfc_up_nest);
239         if (ret)
240                 goto err_out;
241
242         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
243         if (!dcbnl_skb)
244                 goto err_out;
245
246         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
247
248         dcb = NLMSG_DATA(nlh);
249         dcb->dcb_family = AF_UNSPEC;
250         dcb->cmd = DCB_CMD_PFC_GCFG;
251
252         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
253         if (!nest)
254                 goto err;
255
256         if (data[DCB_PFC_UP_ATTR_ALL])
257                 getall = 1;
258
259         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
260                 if (!getall && !data[i])
261                         continue;
262
263                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
264                                              &value);
265                 ret = nla_put_u8(dcbnl_skb, i, value);
266
267                 if (ret) {
268                         nla_nest_cancel(dcbnl_skb, nest);
269                         goto err;
270                 }
271         }
272         nla_nest_end(dcbnl_skb, nest);
273
274         nlmsg_end(dcbnl_skb, nlh);
275
276         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
277         if (ret)
278                 goto err;
279
280         return 0;
281 nlmsg_failure:
282 err:
283         kfree_skb(dcbnl_skb);
284 err_out:
285         return -EINVAL;
286 }
287
288 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
289                                 u32 pid, u32 seq, u16 flags)
290 {
291         struct sk_buff *dcbnl_skb;
292         struct nlmsghdr *nlh;
293         struct dcbmsg *dcb;
294         u8 perm_addr[MAX_ADDR_LEN];
295         int ret = -EINVAL;
296
297         if (!netdev->dcbnl_ops->getpermhwaddr)
298                 return ret;
299
300         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
301         if (!dcbnl_skb)
302                 goto err_out;
303
304         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
305
306         dcb = NLMSG_DATA(nlh);
307         dcb->dcb_family = AF_UNSPEC;
308         dcb->cmd = DCB_CMD_GPERM_HWADDR;
309
310         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
311
312         ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
313                       perm_addr);
314
315         nlmsg_end(dcbnl_skb, nlh);
316
317         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
318         if (ret)
319                 goto err;
320
321         return 0;
322
323 nlmsg_failure:
324 err:
325         kfree_skb(dcbnl_skb);
326 err_out:
327         return -EINVAL;
328 }
329
330 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
331                         u32 pid, u32 seq, u16 flags)
332 {
333         struct sk_buff *dcbnl_skb;
334         struct nlmsghdr *nlh;
335         struct dcbmsg *dcb;
336         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
337         u8 value;
338         int ret = -EINVAL;
339         int i;
340         int getall = 0;
341
342         if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
343                 return ret;
344
345         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
346                                dcbnl_cap_nest);
347         if (ret)
348                 goto err_out;
349
350         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
351         if (!dcbnl_skb)
352                 goto err_out;
353
354         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
355
356         dcb = NLMSG_DATA(nlh);
357         dcb->dcb_family = AF_UNSPEC;
358         dcb->cmd = DCB_CMD_GCAP;
359
360         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
361         if (!nest)
362                 goto err;
363
364         if (data[DCB_CAP_ATTR_ALL])
365                 getall = 1;
366
367         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
368                 if (!getall && !data[i])
369                         continue;
370
371                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
372                         ret = nla_put_u8(dcbnl_skb, i, value);
373
374                         if (ret) {
375                                 nla_nest_cancel(dcbnl_skb, nest);
376                                 goto err;
377                         }
378                 }
379         }
380         nla_nest_end(dcbnl_skb, nest);
381
382         nlmsg_end(dcbnl_skb, nlh);
383
384         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
385         if (ret)
386                 goto err;
387
388         return 0;
389 nlmsg_failure:
390 err:
391         kfree_skb(dcbnl_skb);
392 err_out:
393         return -EINVAL;
394 }
395
396 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
397                            u32 pid, u32 seq, u16 flags)
398 {
399         struct sk_buff *dcbnl_skb;
400         struct nlmsghdr *nlh;
401         struct dcbmsg *dcb;
402         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
403         u8 value;
404         int ret = -EINVAL;
405         int i;
406         int getall = 0;
407
408         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
409                 return ret;
410
411         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
412                                dcbnl_numtcs_nest);
413         if (ret) {
414                 ret = -EINVAL;
415                 goto err_out;
416         }
417
418         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
419         if (!dcbnl_skb) {
420                 ret = -EINVAL;
421                 goto err_out;
422         }
423
424         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
425
426         dcb = NLMSG_DATA(nlh);
427         dcb->dcb_family = AF_UNSPEC;
428         dcb->cmd = DCB_CMD_GNUMTCS;
429
430         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
431         if (!nest) {
432                 ret = -EINVAL;
433                 goto err;
434         }
435
436         if (data[DCB_NUMTCS_ATTR_ALL])
437                 getall = 1;
438
439         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
440                 if (!getall && !data[i])
441                         continue;
442
443                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
444                 if (!ret) {
445                         ret = nla_put_u8(dcbnl_skb, i, value);
446
447                         if (ret) {
448                                 nla_nest_cancel(dcbnl_skb, nest);
449                                 ret = -EINVAL;
450                                 goto err;
451                         }
452                 } else {
453                         goto err;
454                 }
455         }
456         nla_nest_end(dcbnl_skb, nest);
457
458         nlmsg_end(dcbnl_skb, nlh);
459
460         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
461         if (ret) {
462                 ret = -EINVAL;
463                 goto err;
464         }
465
466         return 0;
467 nlmsg_failure:
468 err:
469         kfree_skb(dcbnl_skb);
470 err_out:
471         return ret;
472 }
473
474 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
475                            u32 pid, u32 seq, u16 flags)
476 {
477         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
478         int ret = -EINVAL;
479         u8 value;
480         int i;
481
482         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
483                 return ret;
484
485         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
486                                dcbnl_numtcs_nest);
487
488         if (ret) {
489                 ret = -EINVAL;
490                 goto err;
491         }
492
493         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
494                 if (data[i] == NULL)
495                         continue;
496
497                 value = nla_get_u8(data[i]);
498
499                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
500
501                 if (ret)
502                         goto operr;
503         }
504
505 operr:
506         ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
507                           DCB_ATTR_NUMTCS, pid, seq, flags);
508
509 err:
510         return ret;
511 }
512
513 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
514                              u32 pid, u32 seq, u16 flags)
515 {
516         int ret = -EINVAL;
517
518         if (!netdev->dcbnl_ops->getpfcstate)
519                 return ret;
520
521         ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
522                           DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
523                           pid, seq, flags);
524
525         return ret;
526 }
527
528 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
529                              u32 pid, u32 seq, u16 flags)
530 {
531         int ret = -EINVAL;
532         u8 value;
533
534         if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
535                 return ret;
536
537         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
538
539         netdev->dcbnl_ops->setpfcstate(netdev, value);
540
541         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
542                           pid, seq, flags);
543
544         return ret;
545 }
546
547 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
548                              u32 pid, u32 seq, u16 flags, int dir)
549 {
550         struct sk_buff *dcbnl_skb;
551         struct nlmsghdr *nlh;
552         struct dcbmsg *dcb;
553         struct nlattr *pg_nest, *param_nest, *data;
554         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
555         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
556         u8 prio, pgid, tc_pct, up_map;
557         int ret  = -EINVAL;
558         int getall = 0;
559         int i;
560
561         if (!tb[DCB_ATTR_PG_CFG] ||
562             !netdev->dcbnl_ops->getpgtccfgtx ||
563             !netdev->dcbnl_ops->getpgtccfgrx ||
564             !netdev->dcbnl_ops->getpgbwgcfgtx ||
565             !netdev->dcbnl_ops->getpgbwgcfgrx)
566                 return ret;
567
568         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
569                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
570
571         if (ret)
572                 goto err_out;
573
574         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
575         if (!dcbnl_skb)
576                 goto err_out;
577
578         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
579
580         dcb = NLMSG_DATA(nlh);
581         dcb->dcb_family = AF_UNSPEC;
582         dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
583
584         pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
585         if (!pg_nest)
586                 goto err;
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(dcbnl_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(dcbnl_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(dcbnl_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(dcbnl_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(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
649                                          tc_pct);
650                         if (ret)
651                                 goto err_param;
652                 }
653                 nla_nest_end(dcbnl_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(dcbnl_skb, i, tc_pct);
677
678                 if (ret)
679                         goto err_pg;
680         }
681
682         nla_nest_end(dcbnl_skb, pg_nest);
683
684         nlmsg_end(dcbnl_skb, nlh);
685
686         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
687         if (ret)
688                 goto err;
689
690         return 0;
691
692 err_param:
693         nla_nest_cancel(dcbnl_skb, param_nest);
694 err_pg:
695         nla_nest_cancel(dcbnl_skb, pg_nest);
696 nlmsg_failure:
697 err:
698         kfree_skb(dcbnl_skb);
699 err_out:
700         ret  = -EINVAL;
701         return ret;
702 }
703
704 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
705                              u32 pid, u32 seq, u16 flags)
706 {
707         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
708 }
709
710 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
711                              u32 pid, u32 seq, u16 flags)
712 {
713         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
714 }
715
716 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
717                           u32 pid, u32 seq, u16 flags)
718 {
719         int ret = -EINVAL;
720         u8 value;
721
722         if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
723                 return ret;
724
725         value = nla_get_u8(tb[DCB_ATTR_STATE]);
726
727         ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
728                           RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
729                           pid, seq, flags);
730
731         return ret;
732 }
733
734 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
735                            u32 pid, u32 seq, u16 flags)
736 {
737         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
738         int i;
739         int ret = -EINVAL;
740         u8 value;
741
742         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
743                 return ret;
744
745         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
746                                tb[DCB_ATTR_PFC_CFG],
747                                dcbnl_pfc_up_nest);
748         if (ret)
749                 goto err;
750
751         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
752                 if (data[i] == NULL)
753                         continue;
754                 value = nla_get_u8(data[i]);
755                 netdev->dcbnl_ops->setpfccfg(netdev,
756                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
757         }
758
759         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
760                           pid, seq, flags);
761 err:
762         return ret;
763 }
764
765 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
766                         u32 pid, u32 seq, u16 flags)
767 {
768         int ret = -EINVAL;
769
770         if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
771                 return ret;
772
773         ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
774                           DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
775
776         return ret;
777 }
778
779 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
780                              u32 pid, u32 seq, u16 flags, int dir)
781 {
782         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
783         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
784         int ret = -EINVAL;
785         int i;
786         u8 pgid;
787         u8 up_map;
788         u8 prio;
789         u8 tc_pct;
790
791         if (!tb[DCB_ATTR_PG_CFG] ||
792             !netdev->dcbnl_ops->setpgtccfgtx ||
793             !netdev->dcbnl_ops->setpgtccfgrx ||
794             !netdev->dcbnl_ops->setpgbwgcfgtx ||
795             !netdev->dcbnl_ops->setpgbwgcfgrx)
796                 return ret;
797
798         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
799                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
800         if (ret)
801                 goto err;
802
803         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
804                 if (!pg_tb[i])
805                         continue;
806
807                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
808                                        pg_tb[i], dcbnl_tc_param_nest);
809                 if (ret)
810                         goto err;
811
812                 pgid = DCB_ATTR_VALUE_UNDEFINED;
813                 prio = DCB_ATTR_VALUE_UNDEFINED;
814                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
815                 up_map = DCB_ATTR_VALUE_UNDEFINED;
816
817                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
818                         prio =
819                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
820
821                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
822                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
823
824                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
825                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
826
827                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
828                         up_map =
829                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
830
831                 /* dir: Tx = 0, Rx = 1 */
832                 if (dir) {
833                         /* Rx */
834                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
835                                 i - DCB_PG_ATTR_TC_0,
836                                 prio, pgid, tc_pct, up_map);
837                 } else {
838                         /* Tx */
839                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
840                                 i - DCB_PG_ATTR_TC_0,
841                                 prio, pgid, tc_pct, up_map);
842                 }
843         }
844
845         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
846                 if (!pg_tb[i])
847                         continue;
848
849                 tc_pct = nla_get_u8(pg_tb[i]);
850
851                 /* dir: Tx = 0, Rx = 1 */
852                 if (dir) {
853                         /* Rx */
854                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
855                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
856                 } else {
857                         /* Tx */
858                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
859                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
860                 }
861         }
862
863         ret = dcbnl_reply(0, RTM_SETDCB,
864                           (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
865                           DCB_ATTR_PG_CFG, pid, seq, flags);
866
867 err:
868         return ret;
869 }
870
871 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
872                              u32 pid, u32 seq, u16 flags)
873 {
874         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
875 }
876
877 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
878                              u32 pid, u32 seq, u16 flags)
879 {
880         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
881 }
882
883 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
884                             u32 pid, u32 seq, u16 flags)
885 {
886         struct sk_buff *dcbnl_skb;
887         struct nlmsghdr *nlh;
888         struct dcbmsg *dcb;
889         struct nlattr *bcn_nest;
890         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
891         u8 value_byte;
892         u32 value_integer;
893         int ret  = -EINVAL;
894         bool getall = false;
895         int i;
896
897         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
898             !netdev->dcbnl_ops->getbcncfg)
899                 return ret;
900
901         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
902                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
903
904         if (ret)
905                 goto err_out;
906
907         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
908         if (!dcbnl_skb)
909                 goto err_out;
910
911         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
912
913         dcb = NLMSG_DATA(nlh);
914         dcb->dcb_family = AF_UNSPEC;
915         dcb->cmd = DCB_CMD_BCN_GCFG;
916
917         bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
918         if (!bcn_nest)
919                 goto err;
920
921         if (bcn_tb[DCB_BCN_ATTR_ALL])
922                 getall = true;
923
924         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
925                 if (!getall && !bcn_tb[i])
926                         continue;
927
928                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
929                                             &value_byte);
930                 ret = nla_put_u8(dcbnl_skb, i, value_byte);
931                 if (ret)
932                         goto err_bcn;
933         }
934
935         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
936                 if (!getall && !bcn_tb[i])
937                         continue;
938
939                 netdev->dcbnl_ops->getbcncfg(netdev, i,
940                                              &value_integer);
941                 ret = nla_put_u32(dcbnl_skb, i, value_integer);
942                 if (ret)
943                         goto err_bcn;
944         }
945
946         nla_nest_end(dcbnl_skb, bcn_nest);
947
948         nlmsg_end(dcbnl_skb, nlh);
949
950         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
951         if (ret)
952                 goto err;
953
954         return 0;
955
956 err_bcn:
957         nla_nest_cancel(dcbnl_skb, bcn_nest);
958 nlmsg_failure:
959 err:
960         kfree_skb(dcbnl_skb);
961 err_out:
962         ret  = -EINVAL;
963         return ret;
964 }
965
966 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
967                             u32 pid, u32 seq, u16 flags)
968 {
969         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
970         int i;
971         int ret = -EINVAL;
972         u8 value_byte;
973         u32 value_int;
974
975         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg
976             || !netdev->dcbnl_ops->setbcnrp)
977                 return ret;
978
979         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
980                                tb[DCB_ATTR_BCN],
981                                dcbnl_pfc_up_nest);
982         if (ret)
983                 goto err;
984
985         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
986                 if (data[i] == NULL)
987                         continue;
988                 value_byte = nla_get_u8(data[i]);
989                 netdev->dcbnl_ops->setbcnrp(netdev,
990                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
991         }
992
993         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
994                 if (data[i] == NULL)
995                         continue;
996                 value_int = nla_get_u32(data[i]);
997                 netdev->dcbnl_ops->setbcncfg(netdev,
998                                              i, value_int);
999         }
1000
1001         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1002                           pid, seq, flags);
1003 err:
1004         return ret;
1005 }
1006
1007 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1008 {
1009         struct net *net = sock_net(skb->sk);
1010         struct net_device *netdev;
1011         struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1012         struct nlattr *tb[DCB_ATTR_MAX + 1];
1013         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1014         int ret = -EINVAL;
1015
1016         if (net != &init_net)
1017                 return -EINVAL;
1018
1019         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1020                           dcbnl_rtnl_policy);
1021         if (ret < 0)
1022                 return ret;
1023
1024         if (!tb[DCB_ATTR_IFNAME])
1025                 return -EINVAL;
1026
1027         netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1028         if (!netdev)
1029                 return -EINVAL;
1030
1031         if (!netdev->dcbnl_ops)
1032                 goto errout;
1033
1034         switch (dcb->cmd) {
1035         case DCB_CMD_GSTATE:
1036                 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1037                                      nlh->nlmsg_flags);
1038                 goto out;
1039         case DCB_CMD_PFC_GCFG:
1040                 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1041                                       nlh->nlmsg_flags);
1042                 goto out;
1043         case DCB_CMD_GPERM_HWADDR:
1044                 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1045                                            nlh->nlmsg_flags);
1046                 goto out;
1047         case DCB_CMD_PGTX_GCFG:
1048                 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1049                                         nlh->nlmsg_flags);
1050                 goto out;
1051         case DCB_CMD_PGRX_GCFG:
1052                 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1053                                         nlh->nlmsg_flags);
1054                 goto out;
1055         case DCB_CMD_BCN_GCFG:
1056                 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1057                                        nlh->nlmsg_flags);
1058                 goto out;
1059         case DCB_CMD_SSTATE:
1060                 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1061                                      nlh->nlmsg_flags);
1062                 goto out;
1063         case DCB_CMD_PFC_SCFG:
1064                 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1065                                       nlh->nlmsg_flags);
1066                 goto out;
1067
1068         case DCB_CMD_SET_ALL:
1069                 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1070                                    nlh->nlmsg_flags);
1071                 goto out;
1072         case DCB_CMD_PGTX_SCFG:
1073                 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1074                                         nlh->nlmsg_flags);
1075                 goto out;
1076         case DCB_CMD_PGRX_SCFG:
1077                 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1078                                         nlh->nlmsg_flags);
1079                 goto out;
1080         case DCB_CMD_GCAP:
1081                 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1082                                    nlh->nlmsg_flags);
1083                 goto out;
1084         case DCB_CMD_GNUMTCS:
1085                 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1086                                       nlh->nlmsg_flags);
1087                 goto out;
1088         case DCB_CMD_SNUMTCS:
1089                 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1090                                       nlh->nlmsg_flags);
1091                 goto out;
1092         case DCB_CMD_PFC_GSTATE:
1093                 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1094                                         nlh->nlmsg_flags);
1095                 goto out;
1096         case DCB_CMD_PFC_SSTATE:
1097                 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1098                                         nlh->nlmsg_flags);
1099                 goto out;
1100         case DCB_CMD_BCN_SCFG:
1101                 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1102                                        nlh->nlmsg_flags);
1103                 goto out;
1104         default:
1105                 goto errout;
1106         }
1107 errout:
1108         ret = -EINVAL;
1109 out:
1110         dev_put(netdev);
1111         return ret;
1112 }
1113
1114 static int __init dcbnl_init(void)
1115 {
1116         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1117         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1118
1119         return 0;
1120 }
1121 module_init(dcbnl_init);
1122
1123 static void __exit dcbnl_exit(void)
1124 {
1125         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1126         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1127 }
1128 module_exit(dcbnl_exit);
1129
1130