118392f3872e669d0c131ddd9bd3394df414848a
[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 <net/dcbevent.h>
27 #include <linux/rtnetlink.h>
28 #include <net/sock.h>
29
30 /**
31  * Data Center Bridging (DCB) is a collection of Ethernet enhancements
32  * intended to allow network traffic with differing requirements
33  * (highly reliable, no drops vs. best effort vs. low latency) to operate
34  * and co-exist on Ethernet.  Current DCB features are:
35  *
36  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
37  *   framework for assigning bandwidth guarantees to traffic classes.
38  *
39  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
40  *   can work independently for each 802.1p priority.
41  *
42  * Congestion Notification - provides a mechanism for end-to-end congestion
43  *   control for protocols which do not have built-in congestion management.
44  *
45  * More information about the emerging standards for these Ethernet features
46  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
47  *
48  * This file implements an rtnetlink interface to allow configuration of DCB
49  * features for capable devices.
50  */
51
52 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
53 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
54 MODULE_LICENSE("GPL");
55
56 /**************** DCB attribute policies *************************************/
57
58 /* DCB netlink attributes policy */
59 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
60         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
61         [DCB_ATTR_STATE]       = {.type = NLA_U8},
62         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
63         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
64         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
65         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
66         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
67         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
68         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
69         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
70         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
71         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
72         [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
73 };
74
75 /* DCB priority flow control to User Priority nested attributes */
76 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
77         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
78         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
79         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
80         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
81         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
82         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
83         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
84         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
85         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
86 };
87
88 /* DCB priority grouping nested attributes */
89 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
90         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
91         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
92         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
93         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
94         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
95         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
96         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
97         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
98         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
99         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
100         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
101         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
102         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
103         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
104         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
105         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
106         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
107         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
108 };
109
110 /* DCB traffic class nested attributes. */
111 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
112         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
113         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
114         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
115         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
116         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
117 };
118
119 /* DCB capabilities nested attributes. */
120 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
121         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
122         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
123         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
124         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
125         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
126         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
127         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
128         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
129         [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
130 };
131
132 /* DCB capabilities nested attributes. */
133 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
134         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
135         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
136         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
137 };
138
139 /* DCB BCN nested attributes. */
140 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
141         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
142         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
143         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
144         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
145         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
146         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
147         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
148         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
149         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
150         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
151         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
152         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
153         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
154         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
155         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
156         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
157         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
158         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
159         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
160         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
161         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
162         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
163         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
164         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
165         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
166 };
167
168 /* DCB APP nested attributes. */
169 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
170         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
171         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
172         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
173 };
174
175 /* IEEE 802.1Qaz nested attributes. */
176 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
177         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
178         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
179         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
180 };
181
182 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
183         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
184 };
185
186 /* DCB number of traffic classes nested attributes. */
187 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
188         [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
189         [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
190         [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
191         [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
192 };
193
194 static LIST_HEAD(dcb_app_list);
195 static DEFINE_SPINLOCK(dcb_lock);
196
197 /* standard netlink reply call */
198 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
199                        u32 seq, u16 flags)
200 {
201         struct sk_buff *dcbnl_skb;
202         struct dcbmsg *dcb;
203         struct nlmsghdr *nlh;
204         int ret = -EINVAL;
205
206         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
207         if (!dcbnl_skb)
208                 return ret;
209
210         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
211
212         dcb = NLMSG_DATA(nlh);
213         dcb->dcb_family = AF_UNSPEC;
214         dcb->cmd = cmd;
215         dcb->dcb_pad = 0;
216
217         ret = nla_put_u8(dcbnl_skb, attr, value);
218         if (ret)
219                 goto err;
220
221         /* end the message, assign the nlmsg_len. */
222         nlmsg_end(dcbnl_skb, nlh);
223         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
224         if (ret)
225                 return -EINVAL;
226
227         return 0;
228 nlmsg_failure:
229 err:
230         kfree_skb(dcbnl_skb);
231         return ret;
232 }
233
234 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
235                           u32 pid, u32 seq, u16 flags)
236 {
237         int ret = -EINVAL;
238
239         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
240         if (!netdev->dcbnl_ops->getstate)
241                 return ret;
242
243         ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
244                           DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
245
246         return ret;
247 }
248
249 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
250                            u32 pid, u32 seq, u16 flags)
251 {
252         struct sk_buff *dcbnl_skb;
253         struct nlmsghdr *nlh;
254         struct dcbmsg *dcb;
255         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
256         u8 value;
257         int ret = -EINVAL;
258         int i;
259         int getall = 0;
260
261         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
262                 return ret;
263
264         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
265                                tb[DCB_ATTR_PFC_CFG],
266                                dcbnl_pfc_up_nest);
267         if (ret)
268                 goto err_out;
269
270         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
271         if (!dcbnl_skb)
272                 goto err_out;
273
274         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
275
276         dcb = NLMSG_DATA(nlh);
277         dcb->dcb_family = AF_UNSPEC;
278         dcb->cmd = DCB_CMD_PFC_GCFG;
279
280         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
281         if (!nest)
282                 goto err;
283
284         if (data[DCB_PFC_UP_ATTR_ALL])
285                 getall = 1;
286
287         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
288                 if (!getall && !data[i])
289                         continue;
290
291                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
292                                              &value);
293                 ret = nla_put_u8(dcbnl_skb, i, value);
294
295                 if (ret) {
296                         nla_nest_cancel(dcbnl_skb, nest);
297                         goto err;
298                 }
299         }
300         nla_nest_end(dcbnl_skb, nest);
301
302         nlmsg_end(dcbnl_skb, nlh);
303
304         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
305         if (ret)
306                 goto err_out;
307
308         return 0;
309 nlmsg_failure:
310 err:
311         kfree_skb(dcbnl_skb);
312 err_out:
313         return -EINVAL;
314 }
315
316 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
317                                 u32 pid, u32 seq, u16 flags)
318 {
319         struct sk_buff *dcbnl_skb;
320         struct nlmsghdr *nlh;
321         struct dcbmsg *dcb;
322         u8 perm_addr[MAX_ADDR_LEN];
323         int ret = -EINVAL;
324
325         if (!netdev->dcbnl_ops->getpermhwaddr)
326                 return ret;
327
328         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
329         if (!dcbnl_skb)
330                 goto err_out;
331
332         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
333
334         dcb = NLMSG_DATA(nlh);
335         dcb->dcb_family = AF_UNSPEC;
336         dcb->cmd = DCB_CMD_GPERM_HWADDR;
337
338         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
339
340         ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
341                       perm_addr);
342
343         nlmsg_end(dcbnl_skb, nlh);
344
345         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
346         if (ret)
347                 goto err_out;
348
349         return 0;
350
351 nlmsg_failure:
352         kfree_skb(dcbnl_skb);
353 err_out:
354         return -EINVAL;
355 }
356
357 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
358                         u32 pid, u32 seq, u16 flags)
359 {
360         struct sk_buff *dcbnl_skb;
361         struct nlmsghdr *nlh;
362         struct dcbmsg *dcb;
363         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
364         u8 value;
365         int ret = -EINVAL;
366         int i;
367         int getall = 0;
368
369         if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
370                 return ret;
371
372         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
373                                dcbnl_cap_nest);
374         if (ret)
375                 goto err_out;
376
377         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
378         if (!dcbnl_skb)
379                 goto err_out;
380
381         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
382
383         dcb = NLMSG_DATA(nlh);
384         dcb->dcb_family = AF_UNSPEC;
385         dcb->cmd = DCB_CMD_GCAP;
386
387         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
388         if (!nest)
389                 goto err;
390
391         if (data[DCB_CAP_ATTR_ALL])
392                 getall = 1;
393
394         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
395                 if (!getall && !data[i])
396                         continue;
397
398                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
399                         ret = nla_put_u8(dcbnl_skb, i, value);
400
401                         if (ret) {
402                                 nla_nest_cancel(dcbnl_skb, nest);
403                                 goto err;
404                         }
405                 }
406         }
407         nla_nest_end(dcbnl_skb, nest);
408
409         nlmsg_end(dcbnl_skb, nlh);
410
411         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
412         if (ret)
413                 goto err_out;
414
415         return 0;
416 nlmsg_failure:
417 err:
418         kfree_skb(dcbnl_skb);
419 err_out:
420         return -EINVAL;
421 }
422
423 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
424                            u32 pid, u32 seq, u16 flags)
425 {
426         struct sk_buff *dcbnl_skb;
427         struct nlmsghdr *nlh;
428         struct dcbmsg *dcb;
429         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
430         u8 value;
431         int ret = -EINVAL;
432         int i;
433         int getall = 0;
434
435         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
436                 return ret;
437
438         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
439                                dcbnl_numtcs_nest);
440         if (ret) {
441                 ret = -EINVAL;
442                 goto err_out;
443         }
444
445         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
446         if (!dcbnl_skb) {
447                 ret = -EINVAL;
448                 goto err_out;
449         }
450
451         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
452
453         dcb = NLMSG_DATA(nlh);
454         dcb->dcb_family = AF_UNSPEC;
455         dcb->cmd = DCB_CMD_GNUMTCS;
456
457         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
458         if (!nest) {
459                 ret = -EINVAL;
460                 goto err;
461         }
462
463         if (data[DCB_NUMTCS_ATTR_ALL])
464                 getall = 1;
465
466         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
467                 if (!getall && !data[i])
468                         continue;
469
470                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
471                 if (!ret) {
472                         ret = nla_put_u8(dcbnl_skb, i, value);
473
474                         if (ret) {
475                                 nla_nest_cancel(dcbnl_skb, nest);
476                                 ret = -EINVAL;
477                                 goto err;
478                         }
479                 } else {
480                         goto err;
481                 }
482         }
483         nla_nest_end(dcbnl_skb, nest);
484
485         nlmsg_end(dcbnl_skb, nlh);
486
487         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
488         if (ret) {
489                 ret = -EINVAL;
490                 goto err_out;
491         }
492
493         return 0;
494 nlmsg_failure:
495 err:
496         kfree_skb(dcbnl_skb);
497 err_out:
498         return ret;
499 }
500
501 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
502                            u32 pid, u32 seq, u16 flags)
503 {
504         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
505         int ret = -EINVAL;
506         u8 value;
507         int i;
508
509         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
510                 return ret;
511
512         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
513                                dcbnl_numtcs_nest);
514
515         if (ret) {
516                 ret = -EINVAL;
517                 goto err;
518         }
519
520         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
521                 if (data[i] == NULL)
522                         continue;
523
524                 value = nla_get_u8(data[i]);
525
526                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
527
528                 if (ret)
529                         goto operr;
530         }
531
532 operr:
533         ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
534                           DCB_ATTR_NUMTCS, pid, seq, flags);
535
536 err:
537         return ret;
538 }
539
540 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
541                              u32 pid, u32 seq, u16 flags)
542 {
543         int ret = -EINVAL;
544
545         if (!netdev->dcbnl_ops->getpfcstate)
546                 return ret;
547
548         ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
549                           DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
550                           pid, seq, flags);
551
552         return ret;
553 }
554
555 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
556                              u32 pid, u32 seq, u16 flags)
557 {
558         int ret = -EINVAL;
559         u8 value;
560
561         if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
562                 return ret;
563
564         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
565
566         netdev->dcbnl_ops->setpfcstate(netdev, value);
567
568         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
569                           pid, seq, flags);
570
571         return ret;
572 }
573
574 static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
575                         u32 pid, u32 seq, u16 flags)
576 {
577         struct sk_buff *dcbnl_skb;
578         struct nlmsghdr *nlh;
579         struct dcbmsg *dcb;
580         struct nlattr *app_nest;
581         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
582         u16 id;
583         u8 up, idtype;
584         int ret = -EINVAL;
585
586         if (!tb[DCB_ATTR_APP])
587                 goto out;
588
589         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
590                                dcbnl_app_nest);
591         if (ret)
592                 goto out;
593
594         ret = -EINVAL;
595         /* all must be non-null */
596         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
597             (!app_tb[DCB_APP_ATTR_ID]))
598                 goto out;
599
600         /* either by eth type or by socket number */
601         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
602         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
603             (idtype != DCB_APP_IDTYPE_PORTNUM))
604                 goto out;
605
606         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
607
608         if (netdev->dcbnl_ops->getapp) {
609                 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
610         } else {
611                 struct dcb_app app = {
612                                         .selector = idtype,
613                                         .protocol = id,
614                                      };
615                 up = dcb_getapp(netdev, &app);
616         }
617
618         /* send this back */
619         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
620         if (!dcbnl_skb)
621                 goto out;
622
623         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
624         dcb = NLMSG_DATA(nlh);
625         dcb->dcb_family = AF_UNSPEC;
626         dcb->cmd = DCB_CMD_GAPP;
627
628         app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
629         if (!app_nest)
630                 goto out_cancel;
631
632         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
633         if (ret)
634                 goto out_cancel;
635
636         ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
637         if (ret)
638                 goto out_cancel;
639
640         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
641         if (ret)
642                 goto out_cancel;
643
644         nla_nest_end(dcbnl_skb, app_nest);
645         nlmsg_end(dcbnl_skb, nlh);
646
647         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
648         if (ret)
649                 goto nlmsg_failure;
650
651         goto out;
652
653 out_cancel:
654         nla_nest_cancel(dcbnl_skb, app_nest);
655 nlmsg_failure:
656         kfree_skb(dcbnl_skb);
657 out:
658         return ret;
659 }
660
661 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
662                         u32 pid, u32 seq, u16 flags)
663 {
664         int err, ret = -EINVAL;
665         u16 id;
666         u8 up, idtype;
667         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
668
669         if (!tb[DCB_ATTR_APP])
670                 goto out;
671
672         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
673                                dcbnl_app_nest);
674         if (ret)
675                 goto out;
676
677         ret = -EINVAL;
678         /* all must be non-null */
679         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
680             (!app_tb[DCB_APP_ATTR_ID]) ||
681             (!app_tb[DCB_APP_ATTR_PRIORITY]))
682                 goto out;
683
684         /* either by eth type or by socket number */
685         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
686         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
687             (idtype != DCB_APP_IDTYPE_PORTNUM))
688                 goto out;
689
690         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
691         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
692
693         if (netdev->dcbnl_ops->setapp) {
694                 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
695         } else {
696                 struct dcb_app app;
697                 app.selector = idtype;
698                 app.protocol = id;
699                 app.priority = up;
700                 err = dcb_setapp(netdev, &app);
701         }
702
703         ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
704                           pid, seq, flags);
705 out:
706         return ret;
707 }
708
709 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
710                              u32 pid, u32 seq, u16 flags, int dir)
711 {
712         struct sk_buff *dcbnl_skb;
713         struct nlmsghdr *nlh;
714         struct dcbmsg *dcb;
715         struct nlattr *pg_nest, *param_nest, *data;
716         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
717         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
718         u8 prio, pgid, tc_pct, up_map;
719         int ret  = -EINVAL;
720         int getall = 0;
721         int i;
722
723         if (!tb[DCB_ATTR_PG_CFG] ||
724             !netdev->dcbnl_ops->getpgtccfgtx ||
725             !netdev->dcbnl_ops->getpgtccfgrx ||
726             !netdev->dcbnl_ops->getpgbwgcfgtx ||
727             !netdev->dcbnl_ops->getpgbwgcfgrx)
728                 return ret;
729
730         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
731                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
732
733         if (ret)
734                 goto err_out;
735
736         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
737         if (!dcbnl_skb)
738                 goto err_out;
739
740         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
741
742         dcb = NLMSG_DATA(nlh);
743         dcb->dcb_family = AF_UNSPEC;
744         dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
745
746         pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
747         if (!pg_nest)
748                 goto err;
749
750         if (pg_tb[DCB_PG_ATTR_TC_ALL])
751                 getall = 1;
752
753         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
754                 if (!getall && !pg_tb[i])
755                         continue;
756
757                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
758                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
759                 else
760                         data = pg_tb[i];
761                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
762                                        data, dcbnl_tc_param_nest);
763                 if (ret)
764                         goto err_pg;
765
766                 param_nest = nla_nest_start(dcbnl_skb, i);
767                 if (!param_nest)
768                         goto err_pg;
769
770                 pgid = DCB_ATTR_VALUE_UNDEFINED;
771                 prio = DCB_ATTR_VALUE_UNDEFINED;
772                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
773                 up_map = DCB_ATTR_VALUE_UNDEFINED;
774
775                 if (dir) {
776                         /* Rx */
777                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
778                                                 i - DCB_PG_ATTR_TC_0, &prio,
779                                                 &pgid, &tc_pct, &up_map);
780                 } else {
781                         /* Tx */
782                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
783                                                 i - DCB_PG_ATTR_TC_0, &prio,
784                                                 &pgid, &tc_pct, &up_map);
785                 }
786
787                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
788                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
789                         ret = nla_put_u8(dcbnl_skb,
790                                          DCB_TC_ATTR_PARAM_PGID, pgid);
791                         if (ret)
792                                 goto err_param;
793                 }
794                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
795                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
796                         ret = nla_put_u8(dcbnl_skb,
797                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
798                         if (ret)
799                                 goto err_param;
800                 }
801                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
802                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
803                         ret = nla_put_u8(dcbnl_skb,
804                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
805                         if (ret)
806                                 goto err_param;
807                 }
808                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
809                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
810                         ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
811                                          tc_pct);
812                         if (ret)
813                                 goto err_param;
814                 }
815                 nla_nest_end(dcbnl_skb, param_nest);
816         }
817
818         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
819                 getall = 1;
820         else
821                 getall = 0;
822
823         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
824                 if (!getall && !pg_tb[i])
825                         continue;
826
827                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
828
829                 if (dir) {
830                         /* Rx */
831                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
832                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
833                 } else {
834                         /* Tx */
835                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
836                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
837                 }
838                 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
839
840                 if (ret)
841                         goto err_pg;
842         }
843
844         nla_nest_end(dcbnl_skb, pg_nest);
845
846         nlmsg_end(dcbnl_skb, nlh);
847
848         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
849         if (ret)
850                 goto err_out;
851
852         return 0;
853
854 err_param:
855         nla_nest_cancel(dcbnl_skb, param_nest);
856 err_pg:
857         nla_nest_cancel(dcbnl_skb, pg_nest);
858 nlmsg_failure:
859 err:
860         kfree_skb(dcbnl_skb);
861 err_out:
862         ret  = -EINVAL;
863         return ret;
864 }
865
866 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
867                              u32 pid, u32 seq, u16 flags)
868 {
869         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
870 }
871
872 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
873                              u32 pid, u32 seq, u16 flags)
874 {
875         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
876 }
877
878 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
879                           u32 pid, u32 seq, u16 flags)
880 {
881         int ret = -EINVAL;
882         u8 value;
883
884         if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
885                 return ret;
886
887         value = nla_get_u8(tb[DCB_ATTR_STATE]);
888
889         ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
890                           RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
891                           pid, seq, flags);
892
893         return ret;
894 }
895
896 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
897                            u32 pid, u32 seq, u16 flags)
898 {
899         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
900         int i;
901         int ret = -EINVAL;
902         u8 value;
903
904         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
905                 return ret;
906
907         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
908                                tb[DCB_ATTR_PFC_CFG],
909                                dcbnl_pfc_up_nest);
910         if (ret)
911                 goto err;
912
913         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
914                 if (data[i] == NULL)
915                         continue;
916                 value = nla_get_u8(data[i]);
917                 netdev->dcbnl_ops->setpfccfg(netdev,
918                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
919         }
920
921         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
922                           pid, seq, flags);
923 err:
924         return ret;
925 }
926
927 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
928                         u32 pid, u32 seq, u16 flags)
929 {
930         int ret = -EINVAL;
931
932         if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
933                 return ret;
934
935         ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
936                           DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
937
938         return ret;
939 }
940
941 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
942                              u32 pid, u32 seq, u16 flags, int dir)
943 {
944         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
945         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
946         int ret = -EINVAL;
947         int i;
948         u8 pgid;
949         u8 up_map;
950         u8 prio;
951         u8 tc_pct;
952
953         if (!tb[DCB_ATTR_PG_CFG] ||
954             !netdev->dcbnl_ops->setpgtccfgtx ||
955             !netdev->dcbnl_ops->setpgtccfgrx ||
956             !netdev->dcbnl_ops->setpgbwgcfgtx ||
957             !netdev->dcbnl_ops->setpgbwgcfgrx)
958                 return ret;
959
960         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
961                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
962         if (ret)
963                 goto err;
964
965         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
966                 if (!pg_tb[i])
967                         continue;
968
969                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
970                                        pg_tb[i], dcbnl_tc_param_nest);
971                 if (ret)
972                         goto err;
973
974                 pgid = DCB_ATTR_VALUE_UNDEFINED;
975                 prio = DCB_ATTR_VALUE_UNDEFINED;
976                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
977                 up_map = DCB_ATTR_VALUE_UNDEFINED;
978
979                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
980                         prio =
981                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
982
983                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
984                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
985
986                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
987                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
988
989                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
990                         up_map =
991                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
992
993                 /* dir: Tx = 0, Rx = 1 */
994                 if (dir) {
995                         /* Rx */
996                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
997                                 i - DCB_PG_ATTR_TC_0,
998                                 prio, pgid, tc_pct, up_map);
999                 } else {
1000                         /* Tx */
1001                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
1002                                 i - DCB_PG_ATTR_TC_0,
1003                                 prio, pgid, tc_pct, up_map);
1004                 }
1005         }
1006
1007         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1008                 if (!pg_tb[i])
1009                         continue;
1010
1011                 tc_pct = nla_get_u8(pg_tb[i]);
1012
1013                 /* dir: Tx = 0, Rx = 1 */
1014                 if (dir) {
1015                         /* Rx */
1016                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1017                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1018                 } else {
1019                         /* Tx */
1020                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1021                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1022                 }
1023         }
1024
1025         ret = dcbnl_reply(0, RTM_SETDCB,
1026                           (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1027                           DCB_ATTR_PG_CFG, pid, seq, flags);
1028
1029 err:
1030         return ret;
1031 }
1032
1033 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1034                              u32 pid, u32 seq, u16 flags)
1035 {
1036         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1037 }
1038
1039 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1040                              u32 pid, u32 seq, u16 flags)
1041 {
1042         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1043 }
1044
1045 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1046                             u32 pid, u32 seq, u16 flags)
1047 {
1048         struct sk_buff *dcbnl_skb;
1049         struct nlmsghdr *nlh;
1050         struct dcbmsg *dcb;
1051         struct nlattr *bcn_nest;
1052         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1053         u8 value_byte;
1054         u32 value_integer;
1055         int ret  = -EINVAL;
1056         bool getall = false;
1057         int i;
1058
1059         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1060             !netdev->dcbnl_ops->getbcncfg)
1061                 return ret;
1062
1063         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1064                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1065
1066         if (ret)
1067                 goto err_out;
1068
1069         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1070         if (!dcbnl_skb)
1071                 goto err_out;
1072
1073         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1074
1075         dcb = NLMSG_DATA(nlh);
1076         dcb->dcb_family = AF_UNSPEC;
1077         dcb->cmd = DCB_CMD_BCN_GCFG;
1078
1079         bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1080         if (!bcn_nest)
1081                 goto err;
1082
1083         if (bcn_tb[DCB_BCN_ATTR_ALL])
1084                 getall = true;
1085
1086         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1087                 if (!getall && !bcn_tb[i])
1088                         continue;
1089
1090                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1091                                             &value_byte);
1092                 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1093                 if (ret)
1094                         goto err_bcn;
1095         }
1096
1097         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1098                 if (!getall && !bcn_tb[i])
1099                         continue;
1100
1101                 netdev->dcbnl_ops->getbcncfg(netdev, i,
1102                                              &value_integer);
1103                 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1104                 if (ret)
1105                         goto err_bcn;
1106         }
1107
1108         nla_nest_end(dcbnl_skb, bcn_nest);
1109
1110         nlmsg_end(dcbnl_skb, nlh);
1111
1112         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1113         if (ret)
1114                 goto err_out;
1115
1116         return 0;
1117
1118 err_bcn:
1119         nla_nest_cancel(dcbnl_skb, bcn_nest);
1120 nlmsg_failure:
1121 err:
1122         kfree_skb(dcbnl_skb);
1123 err_out:
1124         ret  = -EINVAL;
1125         return ret;
1126 }
1127
1128 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1129                             u32 pid, u32 seq, u16 flags)
1130 {
1131         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1132         int i;
1133         int ret = -EINVAL;
1134         u8 value_byte;
1135         u32 value_int;
1136
1137         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1138             !netdev->dcbnl_ops->setbcnrp)
1139                 return ret;
1140
1141         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1142                                tb[DCB_ATTR_BCN],
1143                                dcbnl_pfc_up_nest);
1144         if (ret)
1145                 goto err;
1146
1147         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1148                 if (data[i] == NULL)
1149                         continue;
1150                 value_byte = nla_get_u8(data[i]);
1151                 netdev->dcbnl_ops->setbcnrp(netdev,
1152                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1153         }
1154
1155         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1156                 if (data[i] == NULL)
1157                         continue;
1158                 value_int = nla_get_u32(data[i]);
1159                 netdev->dcbnl_ops->setbcncfg(netdev,
1160                                              i, value_int);
1161         }
1162
1163         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1164                           pid, seq, flags);
1165 err:
1166         return ret;
1167 }
1168
1169 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1170  * be completed the entire msg is aborted and error value is returned.
1171  * No attempt is made to reconcile the case where only part of the
1172  * cmd can be completed.
1173  */
1174 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1175                           u32 pid, u32 seq, u16 flags)
1176 {
1177         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1178         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1179         int err = -EOPNOTSUPP;
1180
1181         if (!ops)
1182                 goto err;
1183
1184         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1185                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1186         if (err)
1187                 goto err;
1188
1189         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1190                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1191                 err = ops->ieee_setets(netdev, ets);
1192                 if (err)
1193                         goto err;
1194         }
1195
1196         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1197                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1198                 err = ops->ieee_setpfc(netdev, pfc);
1199                 if (err)
1200                         goto err;
1201         }
1202
1203         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1204                 struct nlattr *attr;
1205                 int rem;
1206
1207                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1208                         struct dcb_app *app_data;
1209                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1210                                 continue;
1211                         app_data = nla_data(attr);
1212                         if (ops->ieee_setapp)
1213                                 err = ops->ieee_setapp(netdev, app_data);
1214                         else
1215                                 err = dcb_setapp(netdev, app_data);
1216                         if (err)
1217                                 goto err;
1218                 }
1219         }
1220
1221 err:
1222         dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1223                     pid, seq, flags);
1224         return err;
1225 }
1226
1227 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
1228                                 int app_nested_type, int app_info_type,
1229                                 int app_entry_type)
1230 {
1231         struct dcb_peer_app_info info;
1232         struct dcb_app *table = NULL;
1233         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1234         u16 app_count;
1235         int err;
1236
1237
1238         /**
1239          * retrieve the peer app configuration form the driver. If the driver
1240          * handlers fail exit without doing anything
1241          */
1242         err = ops->peer_getappinfo(netdev, &info, &app_count);
1243         if (!err && app_count) {
1244                 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
1245                 if (!table)
1246                         return -ENOMEM;
1247
1248                 err = ops->peer_getapptable(netdev, table);
1249         }
1250
1251         if (!err) {
1252                 u16 i;
1253                 struct nlattr *app;
1254
1255                 /**
1256                  * build the message, from here on the only possible failure
1257                  * is due to the skb size
1258                  */
1259                 err = -EMSGSIZE;
1260
1261                 app = nla_nest_start(skb, app_nested_type);
1262                 if (!app)
1263                         goto nla_put_failure;
1264
1265                 if (app_info_type)
1266                         NLA_PUT(skb, app_info_type, sizeof(info), &info);
1267
1268                 for (i = 0; i < app_count; i++)
1269                         NLA_PUT(skb, app_entry_type, sizeof(struct dcb_app),
1270                                 &table[i]);
1271
1272                 nla_nest_end(skb, app);
1273         }
1274         err = 0;
1275
1276 nla_put_failure:
1277         kfree(table);
1278         return err;
1279 }
1280
1281 /* Handle IEEE 802.1Qaz GET commands. */
1282 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1283                           u32 pid, u32 seq, u16 flags)
1284 {
1285         struct sk_buff *skb;
1286         struct nlmsghdr *nlh;
1287         struct dcbmsg *dcb;
1288         struct nlattr *ieee, *app;
1289         struct dcb_app_type *itr;
1290         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1291         int err;
1292
1293         if (!ops)
1294                 return -EOPNOTSUPP;
1295
1296         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1297         if (!skb)
1298                 return -ENOBUFS;
1299
1300         nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1301
1302         dcb = NLMSG_DATA(nlh);
1303         dcb->dcb_family = AF_UNSPEC;
1304         dcb->cmd = DCB_CMD_IEEE_GET;
1305
1306         NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1307
1308         ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1309         if (!ieee)
1310                 goto nla_put_failure;
1311
1312         if (ops->ieee_getets) {
1313                 struct ieee_ets ets;
1314                 err = ops->ieee_getets(netdev, &ets);
1315                 if (!err)
1316                         NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1317         }
1318
1319         if (ops->ieee_getpfc) {
1320                 struct ieee_pfc pfc;
1321                 err = ops->ieee_getpfc(netdev, &pfc);
1322                 if (!err)
1323                         NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1324         }
1325
1326         app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1327         if (!app)
1328                 goto nla_put_failure;
1329
1330         spin_lock(&dcb_lock);
1331         list_for_each_entry(itr, &dcb_app_list, list) {
1332                 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1333                         err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1334                                          &itr->app);
1335                         if (err) {
1336                                 spin_unlock(&dcb_lock);
1337                                 goto nla_put_failure;
1338                         }
1339                 }
1340         }
1341         spin_unlock(&dcb_lock);
1342         nla_nest_end(skb, app);
1343
1344         /* get peer info if available */
1345         if (ops->ieee_peer_getets) {
1346                 struct ieee_ets ets;
1347                 err = ops->ieee_peer_getets(netdev, &ets);
1348                 if (!err)
1349                         NLA_PUT(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets);
1350         }
1351
1352         if (ops->ieee_peer_getpfc) {
1353                 struct ieee_pfc pfc;
1354                 err = ops->ieee_peer_getpfc(netdev, &pfc);
1355                 if (!err)
1356                         NLA_PUT(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc);
1357         }
1358
1359         if (ops->peer_getappinfo && ops->peer_getapptable) {
1360                 err = dcbnl_build_peer_app(netdev, skb,
1361                                            DCB_ATTR_IEEE_PEER_APP,
1362                                            DCB_ATTR_IEEE_APP_UNSPEC,
1363                                            DCB_ATTR_IEEE_APP);
1364                 if (err)
1365                         goto nla_put_failure;
1366         }
1367
1368         nla_nest_end(skb, ieee);
1369         nlmsg_end(skb, nlh);
1370
1371         return rtnl_unicast(skb, &init_net, pid);
1372 nla_put_failure:
1373         nlmsg_cancel(skb, nlh);
1374 nlmsg_failure:
1375         kfree_skb(skb);
1376         return -1;
1377 }
1378
1379 /* DCBX configuration */
1380 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1381                          u32 pid, u32 seq, u16 flags)
1382 {
1383         int ret;
1384
1385         if (!netdev->dcbnl_ops->getdcbx)
1386                 return -EOPNOTSUPP;
1387
1388         ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1389                           DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1390
1391         return ret;
1392 }
1393
1394 static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1395                          u32 pid, u32 seq, u16 flags)
1396 {
1397         int ret;
1398         u8 value;
1399
1400         if (!netdev->dcbnl_ops->setdcbx)
1401                 return -EOPNOTSUPP;
1402
1403         if (!tb[DCB_ATTR_DCBX])
1404                 return -EINVAL;
1405
1406         value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1407
1408         ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1409                           RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1410                           pid, seq, flags);
1411
1412         return ret;
1413 }
1414
1415 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1416                             u32 pid, u32 seq, u16 flags)
1417 {
1418         struct sk_buff *dcbnl_skb;
1419         struct nlmsghdr *nlh;
1420         struct dcbmsg *dcb;
1421         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1422         u8 value;
1423         int ret, i;
1424         int getall = 0;
1425
1426         if (!netdev->dcbnl_ops->getfeatcfg)
1427                 return -EOPNOTSUPP;
1428
1429         if (!tb[DCB_ATTR_FEATCFG])
1430                 return -EINVAL;
1431
1432         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1433                                dcbnl_featcfg_nest);
1434         if (ret)
1435                 goto err_out;
1436
1437         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1438         if (!dcbnl_skb) {
1439                 ret = -ENOBUFS;
1440                 goto err_out;
1441         }
1442
1443         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1444
1445         dcb = NLMSG_DATA(nlh);
1446         dcb->dcb_family = AF_UNSPEC;
1447         dcb->cmd = DCB_CMD_GFEATCFG;
1448
1449         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1450         if (!nest) {
1451                 ret = -EMSGSIZE;
1452                 goto nla_put_failure;
1453         }
1454
1455         if (data[DCB_FEATCFG_ATTR_ALL])
1456                 getall = 1;
1457
1458         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1459                 if (!getall && !data[i])
1460                         continue;
1461
1462                 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1463                 if (!ret)
1464                         ret = nla_put_u8(dcbnl_skb, i, value);
1465
1466                 if (ret) {
1467                         nla_nest_cancel(dcbnl_skb, nest);
1468                         goto nla_put_failure;
1469                 }
1470         }
1471         nla_nest_end(dcbnl_skb, nest);
1472
1473         nlmsg_end(dcbnl_skb, nlh);
1474
1475         return rtnl_unicast(dcbnl_skb, &init_net, pid);
1476 nla_put_failure:
1477         nlmsg_cancel(dcbnl_skb, nlh);
1478 nlmsg_failure:
1479         kfree_skb(dcbnl_skb);
1480 err_out:
1481         return ret;
1482 }
1483
1484 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1485                             u32 pid, u32 seq, u16 flags)
1486 {
1487         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1488         int ret, i;
1489         u8 value;
1490
1491         if (!netdev->dcbnl_ops->setfeatcfg)
1492                 return -ENOTSUPP;
1493
1494         if (!tb[DCB_ATTR_FEATCFG])
1495                 return -EINVAL;
1496
1497         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1498                                dcbnl_featcfg_nest);
1499
1500         if (ret)
1501                 goto err;
1502
1503         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1504                 if (data[i] == NULL)
1505                         continue;
1506
1507                 value = nla_get_u8(data[i]);
1508
1509                 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1510
1511                 if (ret)
1512                         goto err;
1513         }
1514 err:
1515         dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1516                     pid, seq, flags);
1517
1518         return ret;
1519 }
1520
1521 /* Handle CEE DCBX GET commands. */
1522 static int dcbnl_cee_get(struct net_device *netdev, struct nlattr **tb,
1523                          u32 pid, u32 seq, u16 flags)
1524 {
1525         struct sk_buff *skb;
1526         struct nlmsghdr *nlh;
1527         struct dcbmsg *dcb;
1528         struct nlattr *cee;
1529         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1530         int err;
1531
1532         if (!ops)
1533                 return -EOPNOTSUPP;
1534
1535         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1536         if (!skb)
1537                 return -ENOBUFS;
1538
1539         nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1540
1541         dcb = NLMSG_DATA(nlh);
1542         dcb->dcb_family = AF_UNSPEC;
1543         dcb->cmd = DCB_CMD_CEE_GET;
1544
1545         NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1546
1547         cee = nla_nest_start(skb, DCB_ATTR_CEE);
1548         if (!cee)
1549                 goto nla_put_failure;
1550
1551         /* get peer info if available */
1552         if (ops->cee_peer_getpg) {
1553                 struct cee_pg pg;
1554                 err = ops->cee_peer_getpg(netdev, &pg);
1555                 if (!err)
1556                         NLA_PUT(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg);
1557         }
1558
1559         if (ops->cee_peer_getpfc) {
1560                 struct cee_pfc pfc;
1561                 err = ops->cee_peer_getpfc(netdev, &pfc);
1562                 if (!err)
1563                         NLA_PUT(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc);
1564         }
1565
1566         if (ops->peer_getappinfo && ops->peer_getapptable) {
1567                 err = dcbnl_build_peer_app(netdev, skb,
1568                                            DCB_ATTR_CEE_PEER_APP_TABLE,
1569                                            DCB_ATTR_CEE_PEER_APP_INFO,
1570                                            DCB_ATTR_CEE_PEER_APP);
1571                 if (err)
1572                         goto nla_put_failure;
1573         }
1574
1575         nla_nest_end(skb, cee);
1576         nlmsg_end(skb, nlh);
1577
1578         return rtnl_unicast(skb, &init_net, pid);
1579 nla_put_failure:
1580         nlmsg_cancel(skb, nlh);
1581 nlmsg_failure:
1582         kfree_skb(skb);
1583         return -1;
1584 }
1585
1586 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1587 {
1588         struct net *net = sock_net(skb->sk);
1589         struct net_device *netdev;
1590         struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1591         struct nlattr *tb[DCB_ATTR_MAX + 1];
1592         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1593         int ret = -EINVAL;
1594
1595         if (!net_eq(net, &init_net))
1596                 return -EINVAL;
1597
1598         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1599                           dcbnl_rtnl_policy);
1600         if (ret < 0)
1601                 return ret;
1602
1603         if (!tb[DCB_ATTR_IFNAME])
1604                 return -EINVAL;
1605
1606         netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1607         if (!netdev)
1608                 return -EINVAL;
1609
1610         if (!netdev->dcbnl_ops)
1611                 goto errout;
1612
1613         switch (dcb->cmd) {
1614         case DCB_CMD_GSTATE:
1615                 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1616                                      nlh->nlmsg_flags);
1617                 goto out;
1618         case DCB_CMD_PFC_GCFG:
1619                 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1620                                       nlh->nlmsg_flags);
1621                 goto out;
1622         case DCB_CMD_GPERM_HWADDR:
1623                 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1624                                            nlh->nlmsg_flags);
1625                 goto out;
1626         case DCB_CMD_PGTX_GCFG:
1627                 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1628                                         nlh->nlmsg_flags);
1629                 goto out;
1630         case DCB_CMD_PGRX_GCFG:
1631                 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1632                                         nlh->nlmsg_flags);
1633                 goto out;
1634         case DCB_CMD_BCN_GCFG:
1635                 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1636                                        nlh->nlmsg_flags);
1637                 goto out;
1638         case DCB_CMD_SSTATE:
1639                 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1640                                      nlh->nlmsg_flags);
1641                 goto out;
1642         case DCB_CMD_PFC_SCFG:
1643                 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1644                                       nlh->nlmsg_flags);
1645                 goto out;
1646
1647         case DCB_CMD_SET_ALL:
1648                 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1649                                    nlh->nlmsg_flags);
1650                 goto out;
1651         case DCB_CMD_PGTX_SCFG:
1652                 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1653                                         nlh->nlmsg_flags);
1654                 goto out;
1655         case DCB_CMD_PGRX_SCFG:
1656                 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1657                                         nlh->nlmsg_flags);
1658                 goto out;
1659         case DCB_CMD_GCAP:
1660                 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1661                                    nlh->nlmsg_flags);
1662                 goto out;
1663         case DCB_CMD_GNUMTCS:
1664                 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1665                                       nlh->nlmsg_flags);
1666                 goto out;
1667         case DCB_CMD_SNUMTCS:
1668                 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1669                                       nlh->nlmsg_flags);
1670                 goto out;
1671         case DCB_CMD_PFC_GSTATE:
1672                 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1673                                         nlh->nlmsg_flags);
1674                 goto out;
1675         case DCB_CMD_PFC_SSTATE:
1676                 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1677                                         nlh->nlmsg_flags);
1678                 goto out;
1679         case DCB_CMD_BCN_SCFG:
1680                 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1681                                        nlh->nlmsg_flags);
1682                 goto out;
1683         case DCB_CMD_GAPP:
1684                 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1685                                    nlh->nlmsg_flags);
1686                 goto out;
1687         case DCB_CMD_SAPP:
1688                 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1689                                    nlh->nlmsg_flags);
1690                 goto out;
1691         case DCB_CMD_IEEE_SET:
1692                 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1693                                  nlh->nlmsg_flags);
1694                 goto out;
1695         case DCB_CMD_IEEE_GET:
1696                 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
1697                                  nlh->nlmsg_flags);
1698                 goto out;
1699         case DCB_CMD_GDCBX:
1700                 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1701                                     nlh->nlmsg_flags);
1702                 goto out;
1703         case DCB_CMD_SDCBX:
1704                 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1705                                     nlh->nlmsg_flags);
1706                 goto out;
1707         case DCB_CMD_GFEATCFG:
1708                 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1709                                        nlh->nlmsg_flags);
1710                 goto out;
1711         case DCB_CMD_SFEATCFG:
1712                 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1713                                        nlh->nlmsg_flags);
1714                 goto out;
1715         case DCB_CMD_CEE_GET:
1716                 ret = dcbnl_cee_get(netdev, tb, pid, nlh->nlmsg_seq,
1717                                     nlh->nlmsg_flags);
1718                 goto out;
1719         default:
1720                 goto errout;
1721         }
1722 errout:
1723         ret = -EINVAL;
1724 out:
1725         dev_put(netdev);
1726         return ret;
1727 }
1728
1729 /**
1730  * dcb_getapp - retrieve the DCBX application user priority
1731  *
1732  * On success returns a non-zero 802.1p user priority bitmap
1733  * otherwise returns 0 as the invalid user priority bitmap to
1734  * indicate an error.
1735  */
1736 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1737 {
1738         struct dcb_app_type *itr;
1739         u8 prio = 0;
1740
1741         spin_lock(&dcb_lock);
1742         list_for_each_entry(itr, &dcb_app_list, list) {
1743                 if (itr->app.selector == app->selector &&
1744                     itr->app.protocol == app->protocol &&
1745                     (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1746                         prio = itr->app.priority;
1747                         break;
1748                 }
1749         }
1750         spin_unlock(&dcb_lock);
1751
1752         return prio;
1753 }
1754 EXPORT_SYMBOL(dcb_getapp);
1755
1756 /**
1757  * ixgbe_dcbnl_setapp - add dcb application data to app list
1758  *
1759  * Priority 0 is the default priority this removes applications
1760  * from the app list if the priority is set to zero.
1761  */
1762 u8 dcb_setapp(struct net_device *dev, struct dcb_app *new)
1763 {
1764         struct dcb_app_type *itr;
1765         struct dcb_app_type event;
1766
1767         memcpy(&event.name, dev->name, sizeof(event.name));
1768         memcpy(&event.app, new, sizeof(event.app));
1769
1770         spin_lock(&dcb_lock);
1771         /* Search for existing match and replace */
1772         list_for_each_entry(itr, &dcb_app_list, list) {
1773                 if (itr->app.selector == new->selector &&
1774                     itr->app.protocol == new->protocol &&
1775                     (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1776                         if (new->priority)
1777                                 itr->app.priority = new->priority;
1778                         else {
1779                                 list_del(&itr->list);
1780                                 kfree(itr);
1781                         }
1782                         goto out;
1783                 }
1784         }
1785         /* App type does not exist add new application type */
1786         if (new->priority) {
1787                 struct dcb_app_type *entry;
1788                 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
1789                 if (!entry) {
1790                         spin_unlock(&dcb_lock);
1791                         return -ENOMEM;
1792                 }
1793
1794                 memcpy(&entry->app, new, sizeof(*new));
1795                 strncpy(entry->name, dev->name, IFNAMSIZ);
1796                 list_add(&entry->list, &dcb_app_list);
1797         }
1798 out:
1799         spin_unlock(&dcb_lock);
1800         call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1801         return 0;
1802 }
1803 EXPORT_SYMBOL(dcb_setapp);
1804
1805 static void dcb_flushapp(void)
1806 {
1807         struct dcb_app_type *app;
1808         struct dcb_app_type *tmp;
1809
1810         spin_lock(&dcb_lock);
1811         list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1812                 list_del(&app->list);
1813                 kfree(app);
1814         }
1815         spin_unlock(&dcb_lock);
1816 }
1817
1818 static int __init dcbnl_init(void)
1819 {
1820         INIT_LIST_HEAD(&dcb_app_list);
1821
1822         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1823         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1824
1825         return 0;
1826 }
1827 module_init(dcbnl_init);
1828
1829 static void __exit dcbnl_exit(void)
1830 {
1831         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1832         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1833         dcb_flushapp();
1834 }
1835 module_exit(dcbnl_exit);