net: Move && and || to end of previous line
[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                 return -EINVAL;
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_out;
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_out;
320
321         return 0;
322
323 nlmsg_failure:
324         kfree_skb(dcbnl_skb);
325 err_out:
326         return -EINVAL;
327 }
328
329 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
330                         u32 pid, u32 seq, u16 flags)
331 {
332         struct sk_buff *dcbnl_skb;
333         struct nlmsghdr *nlh;
334         struct dcbmsg *dcb;
335         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
336         u8 value;
337         int ret = -EINVAL;
338         int i;
339         int getall = 0;
340
341         if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
342                 return ret;
343
344         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
345                                dcbnl_cap_nest);
346         if (ret)
347                 goto err_out;
348
349         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
350         if (!dcbnl_skb)
351                 goto err_out;
352
353         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
354
355         dcb = NLMSG_DATA(nlh);
356         dcb->dcb_family = AF_UNSPEC;
357         dcb->cmd = DCB_CMD_GCAP;
358
359         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
360         if (!nest)
361                 goto err;
362
363         if (data[DCB_CAP_ATTR_ALL])
364                 getall = 1;
365
366         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
367                 if (!getall && !data[i])
368                         continue;
369
370                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
371                         ret = nla_put_u8(dcbnl_skb, i, value);
372
373                         if (ret) {
374                                 nla_nest_cancel(dcbnl_skb, nest);
375                                 goto err;
376                         }
377                 }
378         }
379         nla_nest_end(dcbnl_skb, nest);
380
381         nlmsg_end(dcbnl_skb, nlh);
382
383         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
384         if (ret)
385                 goto err_out;
386
387         return 0;
388 nlmsg_failure:
389 err:
390         kfree_skb(dcbnl_skb);
391 err_out:
392         return -EINVAL;
393 }
394
395 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
396                            u32 pid, u32 seq, u16 flags)
397 {
398         struct sk_buff *dcbnl_skb;
399         struct nlmsghdr *nlh;
400         struct dcbmsg *dcb;
401         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
402         u8 value;
403         int ret = -EINVAL;
404         int i;
405         int getall = 0;
406
407         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
408                 return ret;
409
410         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
411                                dcbnl_numtcs_nest);
412         if (ret) {
413                 ret = -EINVAL;
414                 goto err_out;
415         }
416
417         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
418         if (!dcbnl_skb) {
419                 ret = -EINVAL;
420                 goto err_out;
421         }
422
423         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
424
425         dcb = NLMSG_DATA(nlh);
426         dcb->dcb_family = AF_UNSPEC;
427         dcb->cmd = DCB_CMD_GNUMTCS;
428
429         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
430         if (!nest) {
431                 ret = -EINVAL;
432                 goto err;
433         }
434
435         if (data[DCB_NUMTCS_ATTR_ALL])
436                 getall = 1;
437
438         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
439                 if (!getall && !data[i])
440                         continue;
441
442                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
443                 if (!ret) {
444                         ret = nla_put_u8(dcbnl_skb, i, value);
445
446                         if (ret) {
447                                 nla_nest_cancel(dcbnl_skb, nest);
448                                 ret = -EINVAL;
449                                 goto err;
450                         }
451                 } else {
452                         goto err;
453                 }
454         }
455         nla_nest_end(dcbnl_skb, nest);
456
457         nlmsg_end(dcbnl_skb, nlh);
458
459         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
460         if (ret) {
461                 ret = -EINVAL;
462                 goto err_out;
463         }
464
465         return 0;
466 nlmsg_failure:
467 err:
468         kfree_skb(dcbnl_skb);
469 err_out:
470         return ret;
471 }
472
473 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
474                            u32 pid, u32 seq, u16 flags)
475 {
476         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
477         int ret = -EINVAL;
478         u8 value;
479         int i;
480
481         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
482                 return ret;
483
484         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
485                                dcbnl_numtcs_nest);
486
487         if (ret) {
488                 ret = -EINVAL;
489                 goto err;
490         }
491
492         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
493                 if (data[i] == NULL)
494                         continue;
495
496                 value = nla_get_u8(data[i]);
497
498                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
499
500                 if (ret)
501                         goto operr;
502         }
503
504 operr:
505         ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
506                           DCB_ATTR_NUMTCS, pid, seq, flags);
507
508 err:
509         return ret;
510 }
511
512 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
513                              u32 pid, u32 seq, u16 flags)
514 {
515         int ret = -EINVAL;
516
517         if (!netdev->dcbnl_ops->getpfcstate)
518                 return ret;
519
520         ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
521                           DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
522                           pid, seq, flags);
523
524         return ret;
525 }
526
527 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
528                              u32 pid, u32 seq, u16 flags)
529 {
530         int ret = -EINVAL;
531         u8 value;
532
533         if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
534                 return ret;
535
536         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
537
538         netdev->dcbnl_ops->setpfcstate(netdev, value);
539
540         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
541                           pid, seq, flags);
542
543         return ret;
544 }
545
546 static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
547                         u32 pid, u32 seq, u16 flags)
548 {
549         struct sk_buff *dcbnl_skb;
550         struct nlmsghdr *nlh;
551         struct dcbmsg *dcb;
552         struct nlattr *app_nest;
553         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
554         u16 id;
555         u8 up, idtype;
556         int ret = -EINVAL;
557
558         if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->getapp)
559                 goto out;
560
561         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
562                                dcbnl_app_nest);
563         if (ret)
564                 goto out;
565
566         ret = -EINVAL;
567         /* all must be non-null */
568         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
569             (!app_tb[DCB_APP_ATTR_ID]))
570                 goto out;
571
572         /* either by eth type or by socket number */
573         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
574         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
575             (idtype != DCB_APP_IDTYPE_PORTNUM))
576                 goto out;
577
578         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
579         up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
580
581         /* send this back */
582         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
583         if (!dcbnl_skb)
584                 goto out;
585
586         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
587         dcb = NLMSG_DATA(nlh);
588         dcb->dcb_family = AF_UNSPEC;
589         dcb->cmd = DCB_CMD_GAPP;
590
591         app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
592         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
593         if (ret)
594                 goto out_cancel;
595
596         ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
597         if (ret)
598                 goto out_cancel;
599
600         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
601         if (ret)
602                 goto out_cancel;
603
604         nla_nest_end(dcbnl_skb, app_nest);
605         nlmsg_end(dcbnl_skb, nlh);
606
607         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
608         if (ret)
609                 goto nlmsg_failure;
610
611         goto out;
612
613 out_cancel:
614         nla_nest_cancel(dcbnl_skb, app_nest);
615 nlmsg_failure:
616         kfree_skb(dcbnl_skb);
617 out:
618         return ret;
619 }
620
621 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
622                         u32 pid, u32 seq, u16 flags)
623 {
624         int ret = -EINVAL;
625         u16 id;
626         u8 up, idtype;
627         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
628
629         if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->setapp)
630                 goto out;
631
632         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
633                                dcbnl_app_nest);
634         if (ret)
635                 goto out;
636
637         ret = -EINVAL;
638         /* all must be non-null */
639         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
640             (!app_tb[DCB_APP_ATTR_ID]) ||
641             (!app_tb[DCB_APP_ATTR_PRIORITY]))
642                 goto out;
643
644         /* either by eth type or by socket number */
645         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
646         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
647             (idtype != DCB_APP_IDTYPE_PORTNUM))
648                 goto out;
649
650         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
651         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
652
653         ret = dcbnl_reply(netdev->dcbnl_ops->setapp(netdev, idtype, id, up),
654                           RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
655                           pid, seq, flags);
656 out:
657         return ret;
658 }
659
660 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
661                              u32 pid, u32 seq, u16 flags, int dir)
662 {
663         struct sk_buff *dcbnl_skb;
664         struct nlmsghdr *nlh;
665         struct dcbmsg *dcb;
666         struct nlattr *pg_nest, *param_nest, *data;
667         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
668         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
669         u8 prio, pgid, tc_pct, up_map;
670         int ret  = -EINVAL;
671         int getall = 0;
672         int i;
673
674         if (!tb[DCB_ATTR_PG_CFG] ||
675             !netdev->dcbnl_ops->getpgtccfgtx ||
676             !netdev->dcbnl_ops->getpgtccfgrx ||
677             !netdev->dcbnl_ops->getpgbwgcfgtx ||
678             !netdev->dcbnl_ops->getpgbwgcfgrx)
679                 return ret;
680
681         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
682                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
683
684         if (ret)
685                 goto err_out;
686
687         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
688         if (!dcbnl_skb)
689                 goto err_out;
690
691         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
692
693         dcb = NLMSG_DATA(nlh);
694         dcb->dcb_family = AF_UNSPEC;
695         dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
696
697         pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
698         if (!pg_nest)
699                 goto err;
700
701         if (pg_tb[DCB_PG_ATTR_TC_ALL])
702                 getall = 1;
703
704         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
705                 if (!getall && !pg_tb[i])
706                         continue;
707
708                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
709                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
710                 else
711                         data = pg_tb[i];
712                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
713                                        data, dcbnl_tc_param_nest);
714                 if (ret)
715                         goto err_pg;
716
717                 param_nest = nla_nest_start(dcbnl_skb, i);
718                 if (!param_nest)
719                         goto err_pg;
720
721                 pgid = DCB_ATTR_VALUE_UNDEFINED;
722                 prio = DCB_ATTR_VALUE_UNDEFINED;
723                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
724                 up_map = DCB_ATTR_VALUE_UNDEFINED;
725
726                 if (dir) {
727                         /* Rx */
728                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
729                                                 i - DCB_PG_ATTR_TC_0, &prio,
730                                                 &pgid, &tc_pct, &up_map);
731                 } else {
732                         /* Tx */
733                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
734                                                 i - DCB_PG_ATTR_TC_0, &prio,
735                                                 &pgid, &tc_pct, &up_map);
736                 }
737
738                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
739                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
740                         ret = nla_put_u8(dcbnl_skb,
741                                          DCB_TC_ATTR_PARAM_PGID, pgid);
742                         if (ret)
743                                 goto err_param;
744                 }
745                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
746                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
747                         ret = nla_put_u8(dcbnl_skb,
748                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
749                         if (ret)
750                                 goto err_param;
751                 }
752                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
753                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
754                         ret = nla_put_u8(dcbnl_skb,
755                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
756                         if (ret)
757                                 goto err_param;
758                 }
759                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
760                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
761                         ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
762                                          tc_pct);
763                         if (ret)
764                                 goto err_param;
765                 }
766                 nla_nest_end(dcbnl_skb, param_nest);
767         }
768
769         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
770                 getall = 1;
771         else
772                 getall = 0;
773
774         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
775                 if (!getall && !pg_tb[i])
776                         continue;
777
778                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
779
780                 if (dir) {
781                         /* Rx */
782                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
783                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
784                 } else {
785                         /* Tx */
786                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
787                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
788                 }
789                 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
790
791                 if (ret)
792                         goto err_pg;
793         }
794
795         nla_nest_end(dcbnl_skb, pg_nest);
796
797         nlmsg_end(dcbnl_skb, nlh);
798
799         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
800         if (ret)
801                 goto err_out;
802
803         return 0;
804
805 err_param:
806         nla_nest_cancel(dcbnl_skb, param_nest);
807 err_pg:
808         nla_nest_cancel(dcbnl_skb, pg_nest);
809 nlmsg_failure:
810 err:
811         kfree_skb(dcbnl_skb);
812 err_out:
813         ret  = -EINVAL;
814         return ret;
815 }
816
817 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
818                              u32 pid, u32 seq, u16 flags)
819 {
820         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
821 }
822
823 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
824                              u32 pid, u32 seq, u16 flags)
825 {
826         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
827 }
828
829 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
830                           u32 pid, u32 seq, u16 flags)
831 {
832         int ret = -EINVAL;
833         u8 value;
834
835         if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
836                 return ret;
837
838         value = nla_get_u8(tb[DCB_ATTR_STATE]);
839
840         ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
841                           RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
842                           pid, seq, flags);
843
844         return ret;
845 }
846
847 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
848                            u32 pid, u32 seq, u16 flags)
849 {
850         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
851         int i;
852         int ret = -EINVAL;
853         u8 value;
854
855         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
856                 return ret;
857
858         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
859                                tb[DCB_ATTR_PFC_CFG],
860                                dcbnl_pfc_up_nest);
861         if (ret)
862                 goto err;
863
864         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
865                 if (data[i] == NULL)
866                         continue;
867                 value = nla_get_u8(data[i]);
868                 netdev->dcbnl_ops->setpfccfg(netdev,
869                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
870         }
871
872         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
873                           pid, seq, flags);
874 err:
875         return ret;
876 }
877
878 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
879                         u32 pid, u32 seq, u16 flags)
880 {
881         int ret = -EINVAL;
882
883         if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
884                 return ret;
885
886         ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
887                           DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
888
889         return ret;
890 }
891
892 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
893                              u32 pid, u32 seq, u16 flags, int dir)
894 {
895         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
896         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
897         int ret = -EINVAL;
898         int i;
899         u8 pgid;
900         u8 up_map;
901         u8 prio;
902         u8 tc_pct;
903
904         if (!tb[DCB_ATTR_PG_CFG] ||
905             !netdev->dcbnl_ops->setpgtccfgtx ||
906             !netdev->dcbnl_ops->setpgtccfgrx ||
907             !netdev->dcbnl_ops->setpgbwgcfgtx ||
908             !netdev->dcbnl_ops->setpgbwgcfgrx)
909                 return ret;
910
911         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
912                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
913         if (ret)
914                 goto err;
915
916         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
917                 if (!pg_tb[i])
918                         continue;
919
920                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
921                                        pg_tb[i], dcbnl_tc_param_nest);
922                 if (ret)
923                         goto err;
924
925                 pgid = DCB_ATTR_VALUE_UNDEFINED;
926                 prio = DCB_ATTR_VALUE_UNDEFINED;
927                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
928                 up_map = DCB_ATTR_VALUE_UNDEFINED;
929
930                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
931                         prio =
932                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
933
934                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
935                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
936
937                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
938                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
939
940                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
941                         up_map =
942                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
943
944                 /* dir: Tx = 0, Rx = 1 */
945                 if (dir) {
946                         /* Rx */
947                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
948                                 i - DCB_PG_ATTR_TC_0,
949                                 prio, pgid, tc_pct, up_map);
950                 } else {
951                         /* Tx */
952                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
953                                 i - DCB_PG_ATTR_TC_0,
954                                 prio, pgid, tc_pct, up_map);
955                 }
956         }
957
958         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
959                 if (!pg_tb[i])
960                         continue;
961
962                 tc_pct = nla_get_u8(pg_tb[i]);
963
964                 /* dir: Tx = 0, Rx = 1 */
965                 if (dir) {
966                         /* Rx */
967                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
968                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
969                 } else {
970                         /* Tx */
971                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
972                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
973                 }
974         }
975
976         ret = dcbnl_reply(0, RTM_SETDCB,
977                           (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
978                           DCB_ATTR_PG_CFG, pid, seq, flags);
979
980 err:
981         return ret;
982 }
983
984 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
985                              u32 pid, u32 seq, u16 flags)
986 {
987         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
988 }
989
990 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
991                              u32 pid, u32 seq, u16 flags)
992 {
993         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
994 }
995
996 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
997                             u32 pid, u32 seq, u16 flags)
998 {
999         struct sk_buff *dcbnl_skb;
1000         struct nlmsghdr *nlh;
1001         struct dcbmsg *dcb;
1002         struct nlattr *bcn_nest;
1003         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1004         u8 value_byte;
1005         u32 value_integer;
1006         int ret  = -EINVAL;
1007         bool getall = false;
1008         int i;
1009
1010         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1011             !netdev->dcbnl_ops->getbcncfg)
1012                 return ret;
1013
1014         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1015                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1016
1017         if (ret)
1018                 goto err_out;
1019
1020         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1021         if (!dcbnl_skb)
1022                 goto err_out;
1023
1024         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1025
1026         dcb = NLMSG_DATA(nlh);
1027         dcb->dcb_family = AF_UNSPEC;
1028         dcb->cmd = DCB_CMD_BCN_GCFG;
1029
1030         bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1031         if (!bcn_nest)
1032                 goto err;
1033
1034         if (bcn_tb[DCB_BCN_ATTR_ALL])
1035                 getall = true;
1036
1037         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1038                 if (!getall && !bcn_tb[i])
1039                         continue;
1040
1041                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1042                                             &value_byte);
1043                 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1044                 if (ret)
1045                         goto err_bcn;
1046         }
1047
1048         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1049                 if (!getall && !bcn_tb[i])
1050                         continue;
1051
1052                 netdev->dcbnl_ops->getbcncfg(netdev, i,
1053                                              &value_integer);
1054                 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1055                 if (ret)
1056                         goto err_bcn;
1057         }
1058
1059         nla_nest_end(dcbnl_skb, bcn_nest);
1060
1061         nlmsg_end(dcbnl_skb, nlh);
1062
1063         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1064         if (ret)
1065                 goto err_out;
1066
1067         return 0;
1068
1069 err_bcn:
1070         nla_nest_cancel(dcbnl_skb, bcn_nest);
1071 nlmsg_failure:
1072 err:
1073         kfree_skb(dcbnl_skb);
1074 err_out:
1075         ret  = -EINVAL;
1076         return ret;
1077 }
1078
1079 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1080                             u32 pid, u32 seq, u16 flags)
1081 {
1082         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1083         int i;
1084         int ret = -EINVAL;
1085         u8 value_byte;
1086         u32 value_int;
1087
1088         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1089             !netdev->dcbnl_ops->setbcnrp)
1090                 return ret;
1091
1092         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1093                                tb[DCB_ATTR_BCN],
1094                                dcbnl_pfc_up_nest);
1095         if (ret)
1096                 goto err;
1097
1098         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1099                 if (data[i] == NULL)
1100                         continue;
1101                 value_byte = nla_get_u8(data[i]);
1102                 netdev->dcbnl_ops->setbcnrp(netdev,
1103                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1104         }
1105
1106         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1107                 if (data[i] == NULL)
1108                         continue;
1109                 value_int = nla_get_u32(data[i]);
1110                 netdev->dcbnl_ops->setbcncfg(netdev,
1111                                              i, value_int);
1112         }
1113
1114         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1115                           pid, seq, flags);
1116 err:
1117         return ret;
1118 }
1119
1120 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1121 {
1122         struct net *net = sock_net(skb->sk);
1123         struct net_device *netdev;
1124         struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1125         struct nlattr *tb[DCB_ATTR_MAX + 1];
1126         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1127         int ret = -EINVAL;
1128
1129         if (!net_eq(net, &init_net))
1130                 return -EINVAL;
1131
1132         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1133                           dcbnl_rtnl_policy);
1134         if (ret < 0)
1135                 return ret;
1136
1137         if (!tb[DCB_ATTR_IFNAME])
1138                 return -EINVAL;
1139
1140         netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1141         if (!netdev)
1142                 return -EINVAL;
1143
1144         if (!netdev->dcbnl_ops)
1145                 goto errout;
1146
1147         switch (dcb->cmd) {
1148         case DCB_CMD_GSTATE:
1149                 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1150                                      nlh->nlmsg_flags);
1151                 goto out;
1152         case DCB_CMD_PFC_GCFG:
1153                 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1154                                       nlh->nlmsg_flags);
1155                 goto out;
1156         case DCB_CMD_GPERM_HWADDR:
1157                 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1158                                            nlh->nlmsg_flags);
1159                 goto out;
1160         case DCB_CMD_PGTX_GCFG:
1161                 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1162                                         nlh->nlmsg_flags);
1163                 goto out;
1164         case DCB_CMD_PGRX_GCFG:
1165                 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1166                                         nlh->nlmsg_flags);
1167                 goto out;
1168         case DCB_CMD_BCN_GCFG:
1169                 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1170                                        nlh->nlmsg_flags);
1171                 goto out;
1172         case DCB_CMD_SSTATE:
1173                 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1174                                      nlh->nlmsg_flags);
1175                 goto out;
1176         case DCB_CMD_PFC_SCFG:
1177                 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1178                                       nlh->nlmsg_flags);
1179                 goto out;
1180
1181         case DCB_CMD_SET_ALL:
1182                 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1183                                    nlh->nlmsg_flags);
1184                 goto out;
1185         case DCB_CMD_PGTX_SCFG:
1186                 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1187                                         nlh->nlmsg_flags);
1188                 goto out;
1189         case DCB_CMD_PGRX_SCFG:
1190                 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1191                                         nlh->nlmsg_flags);
1192                 goto out;
1193         case DCB_CMD_GCAP:
1194                 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1195                                    nlh->nlmsg_flags);
1196                 goto out;
1197         case DCB_CMD_GNUMTCS:
1198                 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1199                                       nlh->nlmsg_flags);
1200                 goto out;
1201         case DCB_CMD_SNUMTCS:
1202                 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1203                                       nlh->nlmsg_flags);
1204                 goto out;
1205         case DCB_CMD_PFC_GSTATE:
1206                 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1207                                         nlh->nlmsg_flags);
1208                 goto out;
1209         case DCB_CMD_PFC_SSTATE:
1210                 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1211                                         nlh->nlmsg_flags);
1212                 goto out;
1213         case DCB_CMD_BCN_SCFG:
1214                 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1215                                        nlh->nlmsg_flags);
1216                 goto out;
1217         case DCB_CMD_GAPP:
1218                 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1219                                    nlh->nlmsg_flags);
1220                 goto out;
1221         case DCB_CMD_SAPP:
1222                 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1223                                    nlh->nlmsg_flags);
1224                 goto out;
1225         default:
1226                 goto errout;
1227         }
1228 errout:
1229         ret = -EINVAL;
1230 out:
1231         dev_put(netdev);
1232         return ret;
1233 }
1234
1235 static int __init dcbnl_init(void)
1236 {
1237         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1238         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1239
1240         return 0;
1241 }
1242 module_init(dcbnl_init);
1243
1244 static void __exit dcbnl_exit(void)
1245 {
1246         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1247         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1248 }
1249 module_exit(dcbnl_exit);
1250
1251