cfd731faf6c6db76834216861a7a9ec3d6de4464
[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 <linux/slab.h>
23 #include <net/netlink.h>
24 #include <net/rtnetlink.h>
25 #include <linux/dcbnl.h>
26 #include <linux/rtnetlink.h>
27 #include <net/sock.h>
28
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 };
71
72 /* DCB priority flow control to User Priority nested attributes */
73 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
74         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
75         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
76         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
77         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
78         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
79         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
80         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
81         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
82         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
83 };
84
85 /* DCB priority grouping nested attributes */
86 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
87         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
88         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
89         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
90         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
91         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
92         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
93         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
94         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
95         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
96         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
97         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
98         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
99         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
100         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
101         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
102         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
103         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
104         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
105 };
106
107 /* DCB traffic class nested attributes. */
108 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
109         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
110         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
111         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
112         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
113         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
114 };
115
116 /* DCB capabilities nested attributes. */
117 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
118         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
119         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
120         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
121         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
122         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
123         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
124         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
125         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
126 };
127
128 /* DCB capabilities nested attributes. */
129 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
130         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
131         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
132         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
133 };
134
135 /* DCB BCN nested attributes. */
136 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
137         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
138         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
139         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
140         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
141         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
142         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
143         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
144         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
145         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
146         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
147         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
148         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
149         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
150         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
151         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
152         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
153         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
154         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
155         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
156         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
157         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
158         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
159         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
160         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
161         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
162 };
163
164 /* DCB APP nested attributes. */
165 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
166         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
167         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
168         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
169 };
170
171 /* IEEE 802.1Qaz nested attributes. */
172 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
173         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
174         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
175         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
176 };
177
178 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
179         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
180 };
181
182 static LIST_HEAD(dcb_app_list);
183 static DEFINE_SPINLOCK(dcb_lock);
184
185 /* standard netlink reply call */
186 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
187                        u32 seq, u16 flags)
188 {
189         struct sk_buff *dcbnl_skb;
190         struct dcbmsg *dcb;
191         struct nlmsghdr *nlh;
192         int ret = -EINVAL;
193
194         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
195         if (!dcbnl_skb)
196                 return ret;
197
198         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
199
200         dcb = NLMSG_DATA(nlh);
201         dcb->dcb_family = AF_UNSPEC;
202         dcb->cmd = cmd;
203         dcb->dcb_pad = 0;
204
205         ret = nla_put_u8(dcbnl_skb, attr, value);
206         if (ret)
207                 goto err;
208
209         /* end the message, assign the nlmsg_len. */
210         nlmsg_end(dcbnl_skb, nlh);
211         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
212         if (ret)
213                 return -EINVAL;
214
215         return 0;
216 nlmsg_failure:
217 err:
218         kfree_skb(dcbnl_skb);
219         return ret;
220 }
221
222 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
223                           u32 pid, u32 seq, u16 flags)
224 {
225         int ret = -EINVAL;
226
227         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
228         if (!netdev->dcbnl_ops->getstate)
229                 return ret;
230
231         ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
232                           DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
233
234         return ret;
235 }
236
237 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
238                            u32 pid, u32 seq, u16 flags)
239 {
240         struct sk_buff *dcbnl_skb;
241         struct nlmsghdr *nlh;
242         struct dcbmsg *dcb;
243         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
244         u8 value;
245         int ret = -EINVAL;
246         int i;
247         int getall = 0;
248
249         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
250                 return ret;
251
252         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
253                                tb[DCB_ATTR_PFC_CFG],
254                                dcbnl_pfc_up_nest);
255         if (ret)
256                 goto err_out;
257
258         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
259         if (!dcbnl_skb)
260                 goto err_out;
261
262         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
263
264         dcb = NLMSG_DATA(nlh);
265         dcb->dcb_family = AF_UNSPEC;
266         dcb->cmd = DCB_CMD_PFC_GCFG;
267
268         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
269         if (!nest)
270                 goto err;
271
272         if (data[DCB_PFC_UP_ATTR_ALL])
273                 getall = 1;
274
275         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
276                 if (!getall && !data[i])
277                         continue;
278
279                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
280                                              &value);
281                 ret = nla_put_u8(dcbnl_skb, i, value);
282
283                 if (ret) {
284                         nla_nest_cancel(dcbnl_skb, nest);
285                         goto err;
286                 }
287         }
288         nla_nest_end(dcbnl_skb, nest);
289
290         nlmsg_end(dcbnl_skb, nlh);
291
292         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
293         if (ret)
294                 goto err_out;
295
296         return 0;
297 nlmsg_failure:
298 err:
299         kfree_skb(dcbnl_skb);
300 err_out:
301         return -EINVAL;
302 }
303
304 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
305                                 u32 pid, u32 seq, u16 flags)
306 {
307         struct sk_buff *dcbnl_skb;
308         struct nlmsghdr *nlh;
309         struct dcbmsg *dcb;
310         u8 perm_addr[MAX_ADDR_LEN];
311         int ret = -EINVAL;
312
313         if (!netdev->dcbnl_ops->getpermhwaddr)
314                 return ret;
315
316         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
317         if (!dcbnl_skb)
318                 goto err_out;
319
320         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
321
322         dcb = NLMSG_DATA(nlh);
323         dcb->dcb_family = AF_UNSPEC;
324         dcb->cmd = DCB_CMD_GPERM_HWADDR;
325
326         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
327
328         ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
329                       perm_addr);
330
331         nlmsg_end(dcbnl_skb, nlh);
332
333         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
334         if (ret)
335                 goto err_out;
336
337         return 0;
338
339 nlmsg_failure:
340         kfree_skb(dcbnl_skb);
341 err_out:
342         return -EINVAL;
343 }
344
345 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
346                         u32 pid, u32 seq, u16 flags)
347 {
348         struct sk_buff *dcbnl_skb;
349         struct nlmsghdr *nlh;
350         struct dcbmsg *dcb;
351         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
352         u8 value;
353         int ret = -EINVAL;
354         int i;
355         int getall = 0;
356
357         if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
358                 return ret;
359
360         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
361                                dcbnl_cap_nest);
362         if (ret)
363                 goto err_out;
364
365         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
366         if (!dcbnl_skb)
367                 goto err_out;
368
369         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
370
371         dcb = NLMSG_DATA(nlh);
372         dcb->dcb_family = AF_UNSPEC;
373         dcb->cmd = DCB_CMD_GCAP;
374
375         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
376         if (!nest)
377                 goto err;
378
379         if (data[DCB_CAP_ATTR_ALL])
380                 getall = 1;
381
382         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
383                 if (!getall && !data[i])
384                         continue;
385
386                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
387                         ret = nla_put_u8(dcbnl_skb, i, value);
388
389                         if (ret) {
390                                 nla_nest_cancel(dcbnl_skb, nest);
391                                 goto err;
392                         }
393                 }
394         }
395         nla_nest_end(dcbnl_skb, nest);
396
397         nlmsg_end(dcbnl_skb, nlh);
398
399         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
400         if (ret)
401                 goto err_out;
402
403         return 0;
404 nlmsg_failure:
405 err:
406         kfree_skb(dcbnl_skb);
407 err_out:
408         return -EINVAL;
409 }
410
411 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
412                            u32 pid, u32 seq, u16 flags)
413 {
414         struct sk_buff *dcbnl_skb;
415         struct nlmsghdr *nlh;
416         struct dcbmsg *dcb;
417         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
418         u8 value;
419         int ret = -EINVAL;
420         int i;
421         int getall = 0;
422
423         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
424                 return ret;
425
426         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
427                                dcbnl_numtcs_nest);
428         if (ret) {
429                 ret = -EINVAL;
430                 goto err_out;
431         }
432
433         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
434         if (!dcbnl_skb) {
435                 ret = -EINVAL;
436                 goto err_out;
437         }
438
439         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
440
441         dcb = NLMSG_DATA(nlh);
442         dcb->dcb_family = AF_UNSPEC;
443         dcb->cmd = DCB_CMD_GNUMTCS;
444
445         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
446         if (!nest) {
447                 ret = -EINVAL;
448                 goto err;
449         }
450
451         if (data[DCB_NUMTCS_ATTR_ALL])
452                 getall = 1;
453
454         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
455                 if (!getall && !data[i])
456                         continue;
457
458                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
459                 if (!ret) {
460                         ret = nla_put_u8(dcbnl_skb, i, value);
461
462                         if (ret) {
463                                 nla_nest_cancel(dcbnl_skb, nest);
464                                 ret = -EINVAL;
465                                 goto err;
466                         }
467                 } else {
468                         goto err;
469                 }
470         }
471         nla_nest_end(dcbnl_skb, nest);
472
473         nlmsg_end(dcbnl_skb, nlh);
474
475         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
476         if (ret) {
477                 ret = -EINVAL;
478                 goto err_out;
479         }
480
481         return 0;
482 nlmsg_failure:
483 err:
484         kfree_skb(dcbnl_skb);
485 err_out:
486         return ret;
487 }
488
489 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
490                            u32 pid, u32 seq, u16 flags)
491 {
492         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
493         int ret = -EINVAL;
494         u8 value;
495         int i;
496
497         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
498                 return ret;
499
500         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
501                                dcbnl_numtcs_nest);
502
503         if (ret) {
504                 ret = -EINVAL;
505                 goto err;
506         }
507
508         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
509                 if (data[i] == NULL)
510                         continue;
511
512                 value = nla_get_u8(data[i]);
513
514                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
515
516                 if (ret)
517                         goto operr;
518         }
519
520 operr:
521         ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
522                           DCB_ATTR_NUMTCS, pid, seq, flags);
523
524 err:
525         return ret;
526 }
527
528 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
529                              u32 pid, u32 seq, u16 flags)
530 {
531         int ret = -EINVAL;
532
533         if (!netdev->dcbnl_ops->getpfcstate)
534                 return ret;
535
536         ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
537                           DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
538                           pid, seq, flags);
539
540         return ret;
541 }
542
543 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
544                              u32 pid, u32 seq, u16 flags)
545 {
546         int ret = -EINVAL;
547         u8 value;
548
549         if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
550                 return ret;
551
552         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
553
554         netdev->dcbnl_ops->setpfcstate(netdev, value);
555
556         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
557                           pid, seq, flags);
558
559         return ret;
560 }
561
562 static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
563                         u32 pid, u32 seq, u16 flags)
564 {
565         struct sk_buff *dcbnl_skb;
566         struct nlmsghdr *nlh;
567         struct dcbmsg *dcb;
568         struct nlattr *app_nest;
569         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
570         u16 id;
571         u8 up, idtype;
572         int ret = -EINVAL;
573
574         if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->getapp)
575                 goto out;
576
577         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
578                                dcbnl_app_nest);
579         if (ret)
580                 goto out;
581
582         ret = -EINVAL;
583         /* all must be non-null */
584         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
585             (!app_tb[DCB_APP_ATTR_ID]))
586                 goto out;
587
588         /* either by eth type or by socket number */
589         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
590         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
591             (idtype != DCB_APP_IDTYPE_PORTNUM))
592                 goto out;
593
594         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
595         up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
596
597         /* send this back */
598         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
599         if (!dcbnl_skb)
600                 goto out;
601
602         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
603         dcb = NLMSG_DATA(nlh);
604         dcb->dcb_family = AF_UNSPEC;
605         dcb->cmd = DCB_CMD_GAPP;
606
607         app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
608         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
609         if (ret)
610                 goto out_cancel;
611
612         ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
613         if (ret)
614                 goto out_cancel;
615
616         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
617         if (ret)
618                 goto out_cancel;
619
620         nla_nest_end(dcbnl_skb, app_nest);
621         nlmsg_end(dcbnl_skb, nlh);
622
623         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
624         if (ret)
625                 goto nlmsg_failure;
626
627         goto out;
628
629 out_cancel:
630         nla_nest_cancel(dcbnl_skb, app_nest);
631 nlmsg_failure:
632         kfree_skb(dcbnl_skb);
633 out:
634         return ret;
635 }
636
637 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
638                         u32 pid, u32 seq, u16 flags)
639 {
640         int err, ret = -EINVAL;
641         u16 id;
642         u8 up, idtype;
643         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
644
645         if (!tb[DCB_ATTR_APP])
646                 goto out;
647
648         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
649                                dcbnl_app_nest);
650         if (ret)
651                 goto out;
652
653         ret = -EINVAL;
654         /* all must be non-null */
655         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
656             (!app_tb[DCB_APP_ATTR_ID]) ||
657             (!app_tb[DCB_APP_ATTR_PRIORITY]))
658                 goto out;
659
660         /* either by eth type or by socket number */
661         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
662         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
663             (idtype != DCB_APP_IDTYPE_PORTNUM))
664                 goto out;
665
666         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
667         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
668
669         if (netdev->dcbnl_ops->setapp) {
670                 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
671         } else {
672                 struct dcb_app app;
673                 app.selector = idtype;
674                 app.protocol = id;
675                 app.priority = up;
676                 err = dcb_setapp(netdev, &app);
677         }
678
679         ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
680                           pid, seq, flags);
681 out:
682         return ret;
683 }
684
685 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
686                              u32 pid, u32 seq, u16 flags, int dir)
687 {
688         struct sk_buff *dcbnl_skb;
689         struct nlmsghdr *nlh;
690         struct dcbmsg *dcb;
691         struct nlattr *pg_nest, *param_nest, *data;
692         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
693         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
694         u8 prio, pgid, tc_pct, up_map;
695         int ret  = -EINVAL;
696         int getall = 0;
697         int i;
698
699         if (!tb[DCB_ATTR_PG_CFG] ||
700             !netdev->dcbnl_ops->getpgtccfgtx ||
701             !netdev->dcbnl_ops->getpgtccfgrx ||
702             !netdev->dcbnl_ops->getpgbwgcfgtx ||
703             !netdev->dcbnl_ops->getpgbwgcfgrx)
704                 return ret;
705
706         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
707                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
708
709         if (ret)
710                 goto err_out;
711
712         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
713         if (!dcbnl_skb)
714                 goto err_out;
715
716         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
717
718         dcb = NLMSG_DATA(nlh);
719         dcb->dcb_family = AF_UNSPEC;
720         dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
721
722         pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
723         if (!pg_nest)
724                 goto err;
725
726         if (pg_tb[DCB_PG_ATTR_TC_ALL])
727                 getall = 1;
728
729         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
730                 if (!getall && !pg_tb[i])
731                         continue;
732
733                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
734                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
735                 else
736                         data = pg_tb[i];
737                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
738                                        data, dcbnl_tc_param_nest);
739                 if (ret)
740                         goto err_pg;
741
742                 param_nest = nla_nest_start(dcbnl_skb, i);
743                 if (!param_nest)
744                         goto err_pg;
745
746                 pgid = DCB_ATTR_VALUE_UNDEFINED;
747                 prio = DCB_ATTR_VALUE_UNDEFINED;
748                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
749                 up_map = DCB_ATTR_VALUE_UNDEFINED;
750
751                 if (dir) {
752                         /* Rx */
753                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
754                                                 i - DCB_PG_ATTR_TC_0, &prio,
755                                                 &pgid, &tc_pct, &up_map);
756                 } else {
757                         /* Tx */
758                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
759                                                 i - DCB_PG_ATTR_TC_0, &prio,
760                                                 &pgid, &tc_pct, &up_map);
761                 }
762
763                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
764                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
765                         ret = nla_put_u8(dcbnl_skb,
766                                          DCB_TC_ATTR_PARAM_PGID, pgid);
767                         if (ret)
768                                 goto err_param;
769                 }
770                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
771                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
772                         ret = nla_put_u8(dcbnl_skb,
773                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
774                         if (ret)
775                                 goto err_param;
776                 }
777                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
778                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
779                         ret = nla_put_u8(dcbnl_skb,
780                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
781                         if (ret)
782                                 goto err_param;
783                 }
784                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
785                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
786                         ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
787                                          tc_pct);
788                         if (ret)
789                                 goto err_param;
790                 }
791                 nla_nest_end(dcbnl_skb, param_nest);
792         }
793
794         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
795                 getall = 1;
796         else
797                 getall = 0;
798
799         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
800                 if (!getall && !pg_tb[i])
801                         continue;
802
803                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
804
805                 if (dir) {
806                         /* Rx */
807                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
808                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
809                 } else {
810                         /* Tx */
811                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
812                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
813                 }
814                 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
815
816                 if (ret)
817                         goto err_pg;
818         }
819
820         nla_nest_end(dcbnl_skb, pg_nest);
821
822         nlmsg_end(dcbnl_skb, nlh);
823
824         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
825         if (ret)
826                 goto err_out;
827
828         return 0;
829
830 err_param:
831         nla_nest_cancel(dcbnl_skb, param_nest);
832 err_pg:
833         nla_nest_cancel(dcbnl_skb, pg_nest);
834 nlmsg_failure:
835 err:
836         kfree_skb(dcbnl_skb);
837 err_out:
838         ret  = -EINVAL;
839         return ret;
840 }
841
842 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
843                              u32 pid, u32 seq, u16 flags)
844 {
845         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
846 }
847
848 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
849                              u32 pid, u32 seq, u16 flags)
850 {
851         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
852 }
853
854 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
855                           u32 pid, u32 seq, u16 flags)
856 {
857         int ret = -EINVAL;
858         u8 value;
859
860         if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
861                 return ret;
862
863         value = nla_get_u8(tb[DCB_ATTR_STATE]);
864
865         ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
866                           RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
867                           pid, seq, flags);
868
869         return ret;
870 }
871
872 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
873                            u32 pid, u32 seq, u16 flags)
874 {
875         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
876         int i;
877         int ret = -EINVAL;
878         u8 value;
879
880         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
881                 return ret;
882
883         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
884                                tb[DCB_ATTR_PFC_CFG],
885                                dcbnl_pfc_up_nest);
886         if (ret)
887                 goto err;
888
889         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
890                 if (data[i] == NULL)
891                         continue;
892                 value = nla_get_u8(data[i]);
893                 netdev->dcbnl_ops->setpfccfg(netdev,
894                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
895         }
896
897         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
898                           pid, seq, flags);
899 err:
900         return ret;
901 }
902
903 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
904                         u32 pid, u32 seq, u16 flags)
905 {
906         int ret = -EINVAL;
907
908         if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
909                 return ret;
910
911         ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
912                           DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
913
914         return ret;
915 }
916
917 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
918                              u32 pid, u32 seq, u16 flags, int dir)
919 {
920         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
921         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
922         int ret = -EINVAL;
923         int i;
924         u8 pgid;
925         u8 up_map;
926         u8 prio;
927         u8 tc_pct;
928
929         if (!tb[DCB_ATTR_PG_CFG] ||
930             !netdev->dcbnl_ops->setpgtccfgtx ||
931             !netdev->dcbnl_ops->setpgtccfgrx ||
932             !netdev->dcbnl_ops->setpgbwgcfgtx ||
933             !netdev->dcbnl_ops->setpgbwgcfgrx)
934                 return ret;
935
936         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
937                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
938         if (ret)
939                 goto err;
940
941         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
942                 if (!pg_tb[i])
943                         continue;
944
945                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
946                                        pg_tb[i], dcbnl_tc_param_nest);
947                 if (ret)
948                         goto err;
949
950                 pgid = DCB_ATTR_VALUE_UNDEFINED;
951                 prio = DCB_ATTR_VALUE_UNDEFINED;
952                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
953                 up_map = DCB_ATTR_VALUE_UNDEFINED;
954
955                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
956                         prio =
957                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
958
959                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
960                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
961
962                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
963                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
964
965                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
966                         up_map =
967                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
968
969                 /* dir: Tx = 0, Rx = 1 */
970                 if (dir) {
971                         /* Rx */
972                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
973                                 i - DCB_PG_ATTR_TC_0,
974                                 prio, pgid, tc_pct, up_map);
975                 } else {
976                         /* Tx */
977                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
978                                 i - DCB_PG_ATTR_TC_0,
979                                 prio, pgid, tc_pct, up_map);
980                 }
981         }
982
983         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
984                 if (!pg_tb[i])
985                         continue;
986
987                 tc_pct = nla_get_u8(pg_tb[i]);
988
989                 /* dir: Tx = 0, Rx = 1 */
990                 if (dir) {
991                         /* Rx */
992                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
993                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
994                 } else {
995                         /* Tx */
996                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
997                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
998                 }
999         }
1000
1001         ret = dcbnl_reply(0, RTM_SETDCB,
1002                           (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1003                           DCB_ATTR_PG_CFG, pid, seq, flags);
1004
1005 err:
1006         return ret;
1007 }
1008
1009 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1010                              u32 pid, u32 seq, u16 flags)
1011 {
1012         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1013 }
1014
1015 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1016                              u32 pid, u32 seq, u16 flags)
1017 {
1018         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1019 }
1020
1021 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1022                             u32 pid, u32 seq, u16 flags)
1023 {
1024         struct sk_buff *dcbnl_skb;
1025         struct nlmsghdr *nlh;
1026         struct dcbmsg *dcb;
1027         struct nlattr *bcn_nest;
1028         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1029         u8 value_byte;
1030         u32 value_integer;
1031         int ret  = -EINVAL;
1032         bool getall = false;
1033         int i;
1034
1035         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1036             !netdev->dcbnl_ops->getbcncfg)
1037                 return ret;
1038
1039         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1040                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1041
1042         if (ret)
1043                 goto err_out;
1044
1045         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1046         if (!dcbnl_skb)
1047                 goto err_out;
1048
1049         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1050
1051         dcb = NLMSG_DATA(nlh);
1052         dcb->dcb_family = AF_UNSPEC;
1053         dcb->cmd = DCB_CMD_BCN_GCFG;
1054
1055         bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1056         if (!bcn_nest)
1057                 goto err;
1058
1059         if (bcn_tb[DCB_BCN_ATTR_ALL])
1060                 getall = true;
1061
1062         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1063                 if (!getall && !bcn_tb[i])
1064                         continue;
1065
1066                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1067                                             &value_byte);
1068                 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1069                 if (ret)
1070                         goto err_bcn;
1071         }
1072
1073         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1074                 if (!getall && !bcn_tb[i])
1075                         continue;
1076
1077                 netdev->dcbnl_ops->getbcncfg(netdev, i,
1078                                              &value_integer);
1079                 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1080                 if (ret)
1081                         goto err_bcn;
1082         }
1083
1084         nla_nest_end(dcbnl_skb, bcn_nest);
1085
1086         nlmsg_end(dcbnl_skb, nlh);
1087
1088         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1089         if (ret)
1090                 goto err_out;
1091
1092         return 0;
1093
1094 err_bcn:
1095         nla_nest_cancel(dcbnl_skb, bcn_nest);
1096 nlmsg_failure:
1097 err:
1098         kfree_skb(dcbnl_skb);
1099 err_out:
1100         ret  = -EINVAL;
1101         return ret;
1102 }
1103
1104 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1105                             u32 pid, u32 seq, u16 flags)
1106 {
1107         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1108         int i;
1109         int ret = -EINVAL;
1110         u8 value_byte;
1111         u32 value_int;
1112
1113         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1114             !netdev->dcbnl_ops->setbcnrp)
1115                 return ret;
1116
1117         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1118                                tb[DCB_ATTR_BCN],
1119                                dcbnl_pfc_up_nest);
1120         if (ret)
1121                 goto err;
1122
1123         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1124                 if (data[i] == NULL)
1125                         continue;
1126                 value_byte = nla_get_u8(data[i]);
1127                 netdev->dcbnl_ops->setbcnrp(netdev,
1128                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1129         }
1130
1131         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1132                 if (data[i] == NULL)
1133                         continue;
1134                 value_int = nla_get_u32(data[i]);
1135                 netdev->dcbnl_ops->setbcncfg(netdev,
1136                                              i, value_int);
1137         }
1138
1139         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1140                           pid, seq, flags);
1141 err:
1142         return ret;
1143 }
1144
1145 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1146  * be completed the entire msg is aborted and error value is returned.
1147  * No attempt is made to reconcile the case where only part of the
1148  * cmd can be completed.
1149  */
1150 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1151                           u32 pid, u32 seq, u16 flags)
1152 {
1153         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1154         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1155         int err = -EOPNOTSUPP;
1156
1157         if (!ops)
1158                 goto err;
1159
1160         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1161                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1162         if (err)
1163                 goto err;
1164
1165         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1166                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1167                 err = ops->ieee_setets(netdev, ets);
1168                 if (err)
1169                         goto err;
1170         }
1171
1172         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setets) {
1173                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1174                 err = ops->ieee_setpfc(netdev, pfc);
1175                 if (err)
1176                         goto err;
1177         }
1178
1179         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1180                 struct nlattr *attr;
1181                 int rem;
1182
1183                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1184                         struct dcb_app *app_data;
1185                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1186                                 continue;
1187                         app_data = nla_data(attr);
1188                         if (ops->ieee_setapp)
1189                                 err = ops->ieee_setapp(netdev, app_data);
1190                         else
1191                                 err = dcb_setapp(netdev, app_data);
1192                         if (err)
1193                                 goto err;
1194                 }
1195         }
1196
1197 err:
1198         dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1199                     pid, seq, flags);
1200         return err;
1201 }
1202
1203
1204 /* Handle IEEE 802.1Qaz GET commands. */
1205 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1206                           u32 pid, u32 seq, u16 flags)
1207 {
1208         struct sk_buff *skb;
1209         struct nlmsghdr *nlh;
1210         struct dcbmsg *dcb;
1211         struct nlattr *ieee, *app;
1212         struct dcb_app_type *itr;
1213         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1214         int err;
1215
1216         if (!ops)
1217                 return -EOPNOTSUPP;
1218
1219         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1220         if (!skb)
1221                 return -ENOBUFS;
1222
1223         nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1224
1225         dcb = NLMSG_DATA(nlh);
1226         dcb->dcb_family = AF_UNSPEC;
1227         dcb->cmd = DCB_CMD_IEEE_GET;
1228
1229         NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1230
1231         ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1232         if (!ieee)
1233                 goto nla_put_failure;
1234
1235         if (ops->ieee_getets) {
1236                 struct ieee_ets ets;
1237                 err = ops->ieee_getets(netdev, &ets);
1238                 if (!err)
1239                         NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1240         }
1241
1242         if (ops->ieee_getpfc) {
1243                 struct ieee_pfc pfc;
1244                 err = ops->ieee_getpfc(netdev, &pfc);
1245                 if (!err)
1246                         NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1247         }
1248
1249         app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1250         if (!app)
1251                 goto nla_put_failure;
1252
1253         spin_lock(&dcb_lock);
1254         list_for_each_entry(itr, &dcb_app_list, list) {
1255                 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0)
1256                         NLA_PUT(skb, DCB_ATTR_IEEE_APP,
1257                                 sizeof(itr->app), &itr->app);
1258         }
1259         spin_unlock(&dcb_lock);
1260         nla_nest_end(skb, app);
1261
1262         nla_nest_end(skb, ieee);
1263         nlmsg_end(skb, nlh);
1264
1265         return rtnl_unicast(skb, &init_net, pid);
1266 nla_put_failure:
1267         nlmsg_cancel(skb, nlh);
1268 nlmsg_failure:
1269         kfree_skb(skb);
1270         return -1;
1271 }
1272
1273 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1274 {
1275         struct net *net = sock_net(skb->sk);
1276         struct net_device *netdev;
1277         struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1278         struct nlattr *tb[DCB_ATTR_MAX + 1];
1279         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1280         int ret = -EINVAL;
1281
1282         if (!net_eq(net, &init_net))
1283                 return -EINVAL;
1284
1285         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1286                           dcbnl_rtnl_policy);
1287         if (ret < 0)
1288                 return ret;
1289
1290         if (!tb[DCB_ATTR_IFNAME])
1291                 return -EINVAL;
1292
1293         netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1294         if (!netdev)
1295                 return -EINVAL;
1296
1297         if (!netdev->dcbnl_ops)
1298                 goto errout;
1299
1300         switch (dcb->cmd) {
1301         case DCB_CMD_GSTATE:
1302                 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1303                                      nlh->nlmsg_flags);
1304                 goto out;
1305         case DCB_CMD_PFC_GCFG:
1306                 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1307                                       nlh->nlmsg_flags);
1308                 goto out;
1309         case DCB_CMD_GPERM_HWADDR:
1310                 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1311                                            nlh->nlmsg_flags);
1312                 goto out;
1313         case DCB_CMD_PGTX_GCFG:
1314                 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1315                                         nlh->nlmsg_flags);
1316                 goto out;
1317         case DCB_CMD_PGRX_GCFG:
1318                 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1319                                         nlh->nlmsg_flags);
1320                 goto out;
1321         case DCB_CMD_BCN_GCFG:
1322                 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1323                                        nlh->nlmsg_flags);
1324                 goto out;
1325         case DCB_CMD_SSTATE:
1326                 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1327                                      nlh->nlmsg_flags);
1328                 goto out;
1329         case DCB_CMD_PFC_SCFG:
1330                 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1331                                       nlh->nlmsg_flags);
1332                 goto out;
1333
1334         case DCB_CMD_SET_ALL:
1335                 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1336                                    nlh->nlmsg_flags);
1337                 goto out;
1338         case DCB_CMD_PGTX_SCFG:
1339                 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1340                                         nlh->nlmsg_flags);
1341                 goto out;
1342         case DCB_CMD_PGRX_SCFG:
1343                 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1344                                         nlh->nlmsg_flags);
1345                 goto out;
1346         case DCB_CMD_GCAP:
1347                 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1348                                    nlh->nlmsg_flags);
1349                 goto out;
1350         case DCB_CMD_GNUMTCS:
1351                 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1352                                       nlh->nlmsg_flags);
1353                 goto out;
1354         case DCB_CMD_SNUMTCS:
1355                 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1356                                       nlh->nlmsg_flags);
1357                 goto out;
1358         case DCB_CMD_PFC_GSTATE:
1359                 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1360                                         nlh->nlmsg_flags);
1361                 goto out;
1362         case DCB_CMD_PFC_SSTATE:
1363                 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1364                                         nlh->nlmsg_flags);
1365                 goto out;
1366         case DCB_CMD_BCN_SCFG:
1367                 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1368                                        nlh->nlmsg_flags);
1369                 goto out;
1370         case DCB_CMD_GAPP:
1371                 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1372                                    nlh->nlmsg_flags);
1373                 goto out;
1374         case DCB_CMD_SAPP:
1375                 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1376                                    nlh->nlmsg_flags);
1377                 goto out;
1378         case DCB_CMD_IEEE_SET:
1379                 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1380                                  nlh->nlmsg_flags);
1381                 goto out;
1382         case DCB_CMD_IEEE_GET:
1383                 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
1384                                  nlh->nlmsg_flags);
1385                 goto out;
1386         default:
1387                 goto errout;
1388         }
1389 errout:
1390         ret = -EINVAL;
1391 out:
1392         dev_put(netdev);
1393         return ret;
1394 }
1395
1396 /**
1397  * dcb_getapp - retrieve the DCBX application user priority
1398  *
1399  * On success returns a non-zero 802.1p user priority bitmap
1400  * otherwise returns 0 as the invalid user priority bitmap to
1401  * indicate an error.
1402  */
1403 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1404 {
1405         struct dcb_app_type *itr;
1406         u8 prio = 0;
1407
1408         spin_lock(&dcb_lock);
1409         list_for_each_entry(itr, &dcb_app_list, list) {
1410                 if (itr->app.selector == app->selector &&
1411                     itr->app.protocol == app->protocol &&
1412                     (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1413                         prio = itr->app.priority;
1414                         break;
1415                 }
1416         }
1417         spin_unlock(&dcb_lock);
1418
1419         return prio;
1420 }
1421 EXPORT_SYMBOL(dcb_getapp);
1422
1423 /**
1424  * ixgbe_dcbnl_setapp - add dcb application data to app list
1425  *
1426  * Priority 0 is the default priority this removes applications
1427  * from the app list if the priority is set to zero.
1428  */
1429 u8 dcb_setapp(struct net_device *dev, struct dcb_app *new)
1430 {
1431         struct dcb_app_type *itr;
1432
1433         spin_lock(&dcb_lock);
1434         /* Search for existing match and replace */
1435         list_for_each_entry(itr, &dcb_app_list, list) {
1436                 if (itr->app.selector == new->selector &&
1437                     itr->app.protocol == new->protocol &&
1438                     (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1439                         if (new->priority)
1440                                 itr->app.priority = new->priority;
1441                         else {
1442                                 list_del(&itr->list);
1443                                 kfree(itr);
1444                         }
1445                         goto out;
1446                 }
1447         }
1448         /* App type does not exist add new application type */
1449         if (new->priority) {
1450                 struct dcb_app_type *entry;
1451                 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
1452                 if (!entry) {
1453                         spin_unlock(&dcb_lock);
1454                         return -ENOMEM;
1455                 }
1456
1457                 memcpy(&entry->app, new, sizeof(*new));
1458                 strncpy(entry->name, dev->name, IFNAMSIZ);
1459                 list_add(&entry->list, &dcb_app_list);
1460         }
1461 out:
1462         spin_unlock(&dcb_lock);
1463         return 0;
1464 }
1465 EXPORT_SYMBOL(dcb_setapp);
1466
1467 void dcb_flushapp(void)
1468 {
1469         struct dcb_app_type *app;
1470
1471         spin_lock(&dcb_lock);
1472         list_for_each_entry(app, &dcb_app_list, list) {
1473                 list_del(&app->list);
1474                 kfree(app);
1475         }
1476         spin_unlock(&dcb_lock);
1477 }
1478
1479 static int __init dcbnl_init(void)
1480 {
1481         INIT_LIST_HEAD(&dcb_app_list);
1482
1483         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1484         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1485
1486         return 0;
1487 }
1488 module_init(dcbnl_init);
1489
1490 static void __exit dcbnl_exit(void)
1491 {
1492         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1493         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1494         dcb_flushapp();
1495 }
1496 module_exit(dcbnl_exit);