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Staging: IIO: DDS: AD9832 / AD9835 driver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / dcb / dcbnl.c
blob6b03f561caecfdd72c1fc0df2785c435acdb3cc4
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 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
630 if (ret)
631 goto out_cancel;
632
633 ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
634 if (ret)
635 goto out_cancel;
636
637 ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
638 if (ret)
639 goto out_cancel;
640
641 nla_nest_end(dcbnl_skb, app_nest);
642 nlmsg_end(dcbnl_skb, nlh);
643
644 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
645 if (ret)
646 goto nlmsg_failure;
647
648 goto out;
649
650 out_cancel:
651 nla_nest_cancel(dcbnl_skb, app_nest);
652 nlmsg_failure:
653 kfree_skb(dcbnl_skb);
654 out:
655 return ret;
656 }
657
658 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
659 u32 pid, u32 seq, u16 flags)
660 {
661 int err, ret = -EINVAL;
662 u16 id;
663 u8 up, idtype;
664 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
665
666 if (!tb[DCB_ATTR_APP])
667 goto out;
668
669 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
670 dcbnl_app_nest);
671 if (ret)
672 goto out;
673
674 ret = -EINVAL;
675 /* all must be non-null */
676 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
677 (!app_tb[DCB_APP_ATTR_ID]) ||
678 (!app_tb[DCB_APP_ATTR_PRIORITY]))
679 goto out;
680
681 /* either by eth type or by socket number */
682 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
683 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
684 (idtype != DCB_APP_IDTYPE_PORTNUM))
685 goto out;
686
687 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
688 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
689
690 if (netdev->dcbnl_ops->setapp) {
691 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
692 } else {
693 struct dcb_app app;
694 app.selector = idtype;
695 app.protocol = id;
696 app.priority = up;
697 err = dcb_setapp(netdev, &app);
698 }
699
700 ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
701 pid, seq, flags);
702 out:
703 return ret;
704 }
705
706 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
707 u32 pid, u32 seq, u16 flags, int dir)
708 {
709 struct sk_buff *dcbnl_skb;
710 struct nlmsghdr *nlh;
711 struct dcbmsg *dcb;
712 struct nlattr *pg_nest, *param_nest, *data;
713 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
714 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
715 u8 prio, pgid, tc_pct, up_map;
716 int ret = -EINVAL;
717 int getall = 0;
718 int i;
719
720 if (!tb[DCB_ATTR_PG_CFG] ||
721 !netdev->dcbnl_ops->getpgtccfgtx ||
722 !netdev->dcbnl_ops->getpgtccfgrx ||
723 !netdev->dcbnl_ops->getpgbwgcfgtx ||
724 !netdev->dcbnl_ops->getpgbwgcfgrx)
725 return ret;
726
727 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
728 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
729
730 if (ret)
731 goto err_out;
732
733 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
734 if (!dcbnl_skb)
735 goto err_out;
736
737 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
738
739 dcb = NLMSG_DATA(nlh);
740 dcb->dcb_family = AF_UNSPEC;
741 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
742
743 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
744 if (!pg_nest)
745 goto err;
746
747 if (pg_tb[DCB_PG_ATTR_TC_ALL])
748 getall = 1;
749
750 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
751 if (!getall && !pg_tb[i])
752 continue;
753
754 if (pg_tb[DCB_PG_ATTR_TC_ALL])
755 data = pg_tb[DCB_PG_ATTR_TC_ALL];
756 else
757 data = pg_tb[i];
758 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
759 data, dcbnl_tc_param_nest);
760 if (ret)
761 goto err_pg;
762
763 param_nest = nla_nest_start(dcbnl_skb, i);
764 if (!param_nest)
765 goto err_pg;
766
767 pgid = DCB_ATTR_VALUE_UNDEFINED;
768 prio = DCB_ATTR_VALUE_UNDEFINED;
769 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
770 up_map = DCB_ATTR_VALUE_UNDEFINED;
771
772 if (dir) {
773 /* Rx */
774 netdev->dcbnl_ops->getpgtccfgrx(netdev,
775 i - DCB_PG_ATTR_TC_0, &prio,
776 &pgid, &tc_pct, &up_map);
777 } else {
778 /* Tx */
779 netdev->dcbnl_ops->getpgtccfgtx(netdev,
780 i - DCB_PG_ATTR_TC_0, &prio,
781 &pgid, &tc_pct, &up_map);
782 }
783
784 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
785 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
786 ret = nla_put_u8(dcbnl_skb,
787 DCB_TC_ATTR_PARAM_PGID, pgid);
788 if (ret)
789 goto err_param;
790 }
791 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
792 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
793 ret = nla_put_u8(dcbnl_skb,
794 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
795 if (ret)
796 goto err_param;
797 }
798 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
799 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
800 ret = nla_put_u8(dcbnl_skb,
801 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
802 if (ret)
803 goto err_param;
804 }
805 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
806 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
807 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
808 tc_pct);
809 if (ret)
810 goto err_param;
811 }
812 nla_nest_end(dcbnl_skb, param_nest);
813 }
814
815 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
816 getall = 1;
817 else
818 getall = 0;
819
820 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
821 if (!getall && !pg_tb[i])
822 continue;
823
824 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
825
826 if (dir) {
827 /* Rx */
828 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
829 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
830 } else {
831 /* Tx */
832 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
833 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
834 }
835 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
836
837 if (ret)
838 goto err_pg;
839 }
840
841 nla_nest_end(dcbnl_skb, pg_nest);
842
843 nlmsg_end(dcbnl_skb, nlh);
844
845 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
846 if (ret)
847 goto err_out;
848
849 return 0;
850
851 err_param:
852 nla_nest_cancel(dcbnl_skb, param_nest);
853 err_pg:
854 nla_nest_cancel(dcbnl_skb, pg_nest);
855 nlmsg_failure:
856 err:
857 kfree_skb(dcbnl_skb);
858 err_out:
859 ret = -EINVAL;
860 return ret;
861 }
862
863 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
864 u32 pid, u32 seq, u16 flags)
865 {
866 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
867 }
868
869 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
870 u32 pid, u32 seq, u16 flags)
871 {
872 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
873 }
874
875 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
876 u32 pid, u32 seq, u16 flags)
877 {
878 int ret = -EINVAL;
879 u8 value;
880
881 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
882 return ret;
883
884 value = nla_get_u8(tb[DCB_ATTR_STATE]);
885
886 ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
887 RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
888 pid, seq, flags);
889
890 return ret;
891 }
892
893 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
894 u32 pid, u32 seq, u16 flags)
895 {
896 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
897 int i;
898 int ret = -EINVAL;
899 u8 value;
900
901 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
902 return ret;
903
904 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
905 tb[DCB_ATTR_PFC_CFG],
906 dcbnl_pfc_up_nest);
907 if (ret)
908 goto err;
909
910 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
911 if (data[i] == NULL)
912 continue;
913 value = nla_get_u8(data[i]);
914 netdev->dcbnl_ops->setpfccfg(netdev,
915 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
916 }
917
918 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
919 pid, seq, flags);
920 err:
921 return ret;
922 }
923
924 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
925 u32 pid, u32 seq, u16 flags)
926 {
927 int ret = -EINVAL;
928
929 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
930 return ret;
931
932 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
933 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
934
935 return ret;
936 }
937
938 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
939 u32 pid, u32 seq, u16 flags, int dir)
940 {
941 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
942 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
943 int ret = -EINVAL;
944 int i;
945 u8 pgid;
946 u8 up_map;
947 u8 prio;
948 u8 tc_pct;
949
950 if (!tb[DCB_ATTR_PG_CFG] ||
951 !netdev->dcbnl_ops->setpgtccfgtx ||
952 !netdev->dcbnl_ops->setpgtccfgrx ||
953 !netdev->dcbnl_ops->setpgbwgcfgtx ||
954 !netdev->dcbnl_ops->setpgbwgcfgrx)
955 return ret;
956
957 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
958 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
959 if (ret)
960 goto err;
961
962 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
963 if (!pg_tb[i])
964 continue;
965
966 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
967 pg_tb[i], dcbnl_tc_param_nest);
968 if (ret)
969 goto err;
970
971 pgid = DCB_ATTR_VALUE_UNDEFINED;
972 prio = DCB_ATTR_VALUE_UNDEFINED;
973 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
974 up_map = DCB_ATTR_VALUE_UNDEFINED;
975
976 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
977 prio =
978 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
979
980 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
981 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
982
983 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
984 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
985
986 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
987 up_map =
988 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
989
990 /* dir: Tx = 0, Rx = 1 */
991 if (dir) {
992 /* Rx */
993 netdev->dcbnl_ops->setpgtccfgrx(netdev,
994 i - DCB_PG_ATTR_TC_0,
995 prio, pgid, tc_pct, up_map);
996 } else {
997 /* Tx */
998 netdev->dcbnl_ops->setpgtccfgtx(netdev,
999 i - DCB_PG_ATTR_TC_0,
1000 prio, pgid, tc_pct, up_map);
1001 }
1002 }
1003
1004 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1005 if (!pg_tb[i])
1006 continue;
1007
1008 tc_pct = nla_get_u8(pg_tb[i]);
1009
1010 /* dir: Tx = 0, Rx = 1 */
1011 if (dir) {
1012 /* Rx */
1013 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1014 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1015 } else {
1016 /* Tx */
1017 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1018 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1019 }
1020 }
1021
1022 ret = dcbnl_reply(0, RTM_SETDCB,
1023 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1024 DCB_ATTR_PG_CFG, pid, seq, flags);
1025
1026 err:
1027 return ret;
1028 }
1029
1030 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1031 u32 pid, u32 seq, u16 flags)
1032 {
1033 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1034 }
1035
1036 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1037 u32 pid, u32 seq, u16 flags)
1038 {
1039 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1040 }
1041
1042 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1043 u32 pid, u32 seq, u16 flags)
1044 {
1045 struct sk_buff *dcbnl_skb;
1046 struct nlmsghdr *nlh;
1047 struct dcbmsg *dcb;
1048 struct nlattr *bcn_nest;
1049 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1050 u8 value_byte;
1051 u32 value_integer;
1052 int ret = -EINVAL;
1053 bool getall = false;
1054 int i;
1055
1056 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1057 !netdev->dcbnl_ops->getbcncfg)
1058 return ret;
1059
1060 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1061 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1062
1063 if (ret)
1064 goto err_out;
1065
1066 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1067 if (!dcbnl_skb)
1068 goto err_out;
1069
1070 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1071
1072 dcb = NLMSG_DATA(nlh);
1073 dcb->dcb_family = AF_UNSPEC;
1074 dcb->cmd = DCB_CMD_BCN_GCFG;
1075
1076 bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1077 if (!bcn_nest)
1078 goto err;
1079
1080 if (bcn_tb[DCB_BCN_ATTR_ALL])
1081 getall = true;
1082
1083 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1084 if (!getall && !bcn_tb[i])
1085 continue;
1086
1087 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1088 &value_byte);
1089 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1090 if (ret)
1091 goto err_bcn;
1092 }
1093
1094 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1095 if (!getall && !bcn_tb[i])
1096 continue;
1097
1098 netdev->dcbnl_ops->getbcncfg(netdev, i,
1099 &value_integer);
1100 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1101 if (ret)
1102 goto err_bcn;
1103 }
1104
1105 nla_nest_end(dcbnl_skb, bcn_nest);
1106
1107 nlmsg_end(dcbnl_skb, nlh);
1108
1109 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1110 if (ret)
1111 goto err_out;
1112
1113 return 0;
1114
1115 err_bcn:
1116 nla_nest_cancel(dcbnl_skb, bcn_nest);
1117 nlmsg_failure:
1118 err:
1119 kfree_skb(dcbnl_skb);
1120 err_out:
1121 ret = -EINVAL;
1122 return ret;
1123 }
1124
1125 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1126 u32 pid, u32 seq, u16 flags)
1127 {
1128 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1129 int i;
1130 int ret = -EINVAL;
1131 u8 value_byte;
1132 u32 value_int;
1133
1134 if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1135 !netdev->dcbnl_ops->setbcnrp)
1136 return ret;
1137
1138 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1139 tb[DCB_ATTR_BCN],
1140 dcbnl_pfc_up_nest);
1141 if (ret)
1142 goto err;
1143
1144 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1145 if (data[i] == NULL)
1146 continue;
1147 value_byte = nla_get_u8(data[i]);
1148 netdev->dcbnl_ops->setbcnrp(netdev,
1149 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1150 }
1151
1152 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1153 if (data[i] == NULL)
1154 continue;
1155 value_int = nla_get_u32(data[i]);
1156 netdev->dcbnl_ops->setbcncfg(netdev,
1157 i, value_int);
1158 }
1159
1160 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1161 pid, seq, flags);
1162 err:
1163 return ret;
1164 }
1165
1166 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1167 * be completed the entire msg is aborted and error value is returned.
1168 * No attempt is made to reconcile the case where only part of the
1169 * cmd can be completed.
1170 */
1171 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1172 u32 pid, u32 seq, u16 flags)
1173 {
1174 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1175 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1176 int err = -EOPNOTSUPP;
1177
1178 if (!ops)
1179 goto err;
1180
1181 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1182 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1183 if (err)
1184 goto err;
1185
1186 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1187 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1188 err = ops->ieee_setets(netdev, ets);
1189 if (err)
1190 goto err;
1191 }
1192
1193 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setets) {
1194 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1195 err = ops->ieee_setpfc(netdev, pfc);
1196 if (err)
1197 goto err;
1198 }
1199
1200 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1201 struct nlattr *attr;
1202 int rem;
1203
1204 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1205 struct dcb_app *app_data;
1206 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1207 continue;
1208 app_data = nla_data(attr);
1209 if (ops->ieee_setapp)
1210 err = ops->ieee_setapp(netdev, app_data);
1211 else
1212 err = dcb_setapp(netdev, app_data);
1213 if (err)
1214 goto err;
1215 }
1216 }
1217
1218 err:
1219 dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1220 pid, seq, flags);
1221 return err;
1222 }
1223
1224
1225 /* Handle IEEE 802.1Qaz GET commands. */
1226 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1227 u32 pid, u32 seq, u16 flags)
1228 {
1229 struct sk_buff *skb;
1230 struct nlmsghdr *nlh;
1231 struct dcbmsg *dcb;
1232 struct nlattr *ieee, *app;
1233 struct dcb_app_type *itr;
1234 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1235 int err;
1236
1237 if (!ops)
1238 return -EOPNOTSUPP;
1239
1240 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1241 if (!skb)
1242 return -ENOBUFS;
1243
1244 nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1245
1246 dcb = NLMSG_DATA(nlh);
1247 dcb->dcb_family = AF_UNSPEC;
1248 dcb->cmd = DCB_CMD_IEEE_GET;
1249
1250 NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1251
1252 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1253 if (!ieee)
1254 goto nla_put_failure;
1255
1256 if (ops->ieee_getets) {
1257 struct ieee_ets ets;
1258 err = ops->ieee_getets(netdev, &ets);
1259 if (!err)
1260 NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1261 }
1262
1263 if (ops->ieee_getpfc) {
1264 struct ieee_pfc pfc;
1265 err = ops->ieee_getpfc(netdev, &pfc);
1266 if (!err)
1267 NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1268 }
1269
1270 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1271 if (!app)
1272 goto nla_put_failure;
1273
1274 spin_lock(&dcb_lock);
1275 list_for_each_entry(itr, &dcb_app_list, list) {
1276 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1277 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1278 &itr->app);
1279 if (err) {
1280 spin_unlock(&dcb_lock);
1281 goto nla_put_failure;
1282 }
1283 }
1284 }
1285 spin_unlock(&dcb_lock);
1286 nla_nest_end(skb, app);
1287
1288 nla_nest_end(skb, ieee);
1289 nlmsg_end(skb, nlh);
1290
1291 return rtnl_unicast(skb, &init_net, pid);
1292 nla_put_failure:
1293 nlmsg_cancel(skb, nlh);
1294 nlmsg_failure:
1295 kfree_skb(skb);
1296 return -1;
1297 }
1298
1299 /* DCBX configuration */
1300 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1301 u32 pid, u32 seq, u16 flags)
1302 {
1303 int ret;
1304
1305 if (!netdev->dcbnl_ops->getdcbx)
1306 return -EOPNOTSUPP;
1307
1308 ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1309 DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1310
1311 return ret;
1312 }
1313
1314 static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1315 u32 pid, u32 seq, u16 flags)
1316 {
1317 int ret;
1318 u8 value;
1319
1320 if (!netdev->dcbnl_ops->setdcbx)
1321 return -EOPNOTSUPP;
1322
1323 if (!tb[DCB_ATTR_DCBX])
1324 return -EINVAL;
1325
1326 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1327
1328 ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1329 RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1330 pid, seq, flags);
1331
1332 return ret;
1333 }
1334
1335 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1336 u32 pid, u32 seq, u16 flags)
1337 {
1338 struct sk_buff *dcbnl_skb;
1339 struct nlmsghdr *nlh;
1340 struct dcbmsg *dcb;
1341 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1342 u8 value;
1343 int ret, i;
1344 int getall = 0;
1345
1346 if (!netdev->dcbnl_ops->getfeatcfg)
1347 return -EOPNOTSUPP;
1348
1349 if (!tb[DCB_ATTR_FEATCFG])
1350 return -EINVAL;
1351
1352 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1353 dcbnl_featcfg_nest);
1354 if (ret)
1355 goto err_out;
1356
1357 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1358 if (!dcbnl_skb) {
1359 ret = -ENOBUFS;
1360 goto err_out;
1361 }
1362
1363 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1364
1365 dcb = NLMSG_DATA(nlh);
1366 dcb->dcb_family = AF_UNSPEC;
1367 dcb->cmd = DCB_CMD_GFEATCFG;
1368
1369 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1370 if (!nest) {
1371 ret = -EMSGSIZE;
1372 goto nla_put_failure;
1373 }
1374
1375 if (data[DCB_FEATCFG_ATTR_ALL])
1376 getall = 1;
1377
1378 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1379 if (!getall && !data[i])
1380 continue;
1381
1382 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1383 if (!ret)
1384 ret = nla_put_u8(dcbnl_skb, i, value);
1385
1386 if (ret) {
1387 nla_nest_cancel(dcbnl_skb, nest);
1388 goto nla_put_failure;
1389 }
1390 }
1391 nla_nest_end(dcbnl_skb, nest);
1392
1393 nlmsg_end(dcbnl_skb, nlh);
1394
1395 return rtnl_unicast(dcbnl_skb, &init_net, pid);
1396 nla_put_failure:
1397 nlmsg_cancel(dcbnl_skb, nlh);
1398 nlmsg_failure:
1399 kfree_skb(dcbnl_skb);
1400 err_out:
1401 return ret;
1402 }
1403
1404 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1405 u32 pid, u32 seq, u16 flags)
1406 {
1407 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1408 int ret, i;
1409 u8 value;
1410
1411 if (!netdev->dcbnl_ops->setfeatcfg)
1412 return -ENOTSUPP;
1413
1414 if (!tb[DCB_ATTR_FEATCFG])
1415 return -EINVAL;
1416
1417 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1418 dcbnl_featcfg_nest);
1419
1420 if (ret)
1421 goto err;
1422
1423 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1424 if (data[i] == NULL)
1425 continue;
1426
1427 value = nla_get_u8(data[i]);
1428
1429 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1430
1431 if (ret)
1432 goto err;
1433 }
1434 err:
1435 dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1436 pid, seq, flags);
1437
1438 return ret;
1439 }
1440
1441 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1442 {
1443 struct net *net = sock_net(skb->sk);
1444 struct net_device *netdev;
1445 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1446 struct nlattr *tb[DCB_ATTR_MAX + 1];
1447 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1448 int ret = -EINVAL;
1449
1450 if (!net_eq(net, &init_net))
1451 return -EINVAL;
1452
1453 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1454 dcbnl_rtnl_policy);
1455 if (ret < 0)
1456 return ret;
1457
1458 if (!tb[DCB_ATTR_IFNAME])
1459 return -EINVAL;
1460
1461 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1462 if (!netdev)
1463 return -EINVAL;
1464
1465 if (!netdev->dcbnl_ops)
1466 goto errout;
1467
1468 switch (dcb->cmd) {
1469 case DCB_CMD_GSTATE:
1470 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1471 nlh->nlmsg_flags);
1472 goto out;
1473 case DCB_CMD_PFC_GCFG:
1474 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1475 nlh->nlmsg_flags);
1476 goto out;
1477 case DCB_CMD_GPERM_HWADDR:
1478 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1479 nlh->nlmsg_flags);
1480 goto out;
1481 case DCB_CMD_PGTX_GCFG:
1482 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1483 nlh->nlmsg_flags);
1484 goto out;
1485 case DCB_CMD_PGRX_GCFG:
1486 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1487 nlh->nlmsg_flags);
1488 goto out;
1489 case DCB_CMD_BCN_GCFG:
1490 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1491 nlh->nlmsg_flags);
1492 goto out;
1493 case DCB_CMD_SSTATE:
1494 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1495 nlh->nlmsg_flags);
1496 goto out;
1497 case DCB_CMD_PFC_SCFG:
1498 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1499 nlh->nlmsg_flags);
1500 goto out;
1501
1502 case DCB_CMD_SET_ALL:
1503 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1504 nlh->nlmsg_flags);
1505 goto out;
1506 case DCB_CMD_PGTX_SCFG:
1507 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1508 nlh->nlmsg_flags);
1509 goto out;
1510 case DCB_CMD_PGRX_SCFG:
1511 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1512 nlh->nlmsg_flags);
1513 goto out;
1514 case DCB_CMD_GCAP:
1515 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1516 nlh->nlmsg_flags);
1517 goto out;
1518 case DCB_CMD_GNUMTCS:
1519 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1520 nlh->nlmsg_flags);
1521 goto out;
1522 case DCB_CMD_SNUMTCS:
1523 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1524 nlh->nlmsg_flags);
1525 goto out;
1526 case DCB_CMD_PFC_GSTATE:
1527 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1528 nlh->nlmsg_flags);
1529 goto out;
1530 case DCB_CMD_PFC_SSTATE:
1531 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1532 nlh->nlmsg_flags);
1533 goto out;
1534 case DCB_CMD_BCN_SCFG:
1535 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1536 nlh->nlmsg_flags);
1537 goto out;
1538 case DCB_CMD_GAPP:
1539 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1540 nlh->nlmsg_flags);
1541 goto out;
1542 case DCB_CMD_SAPP:
1543 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1544 nlh->nlmsg_flags);
1545 goto out;
1546 case DCB_CMD_IEEE_SET:
1547 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1548 nlh->nlmsg_flags);
1549 goto out;
1550 case DCB_CMD_IEEE_GET:
1551 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
1552 nlh->nlmsg_flags);
1553 goto out;
1554 case DCB_CMD_GDCBX:
1555 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1556 nlh->nlmsg_flags);
1557 goto out;
1558 case DCB_CMD_SDCBX:
1559 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1560 nlh->nlmsg_flags);
1561 goto out;
1562 case DCB_CMD_GFEATCFG:
1563 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1564 nlh->nlmsg_flags);
1565 goto out;
1566 case DCB_CMD_SFEATCFG:
1567 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1568 nlh->nlmsg_flags);
1569 goto out;
1570 default:
1571 goto errout;
1572 }
1573 errout:
1574 ret = -EINVAL;
1575 out:
1576 dev_put(netdev);
1577 return ret;
1578 }
1579
1580 /**
1581 * dcb_getapp - retrieve the DCBX application user priority
1582 *
1583 * On success returns a non-zero 802.1p user priority bitmap
1584 * otherwise returns 0 as the invalid user priority bitmap to
1585 * indicate an error.
1586 */
1587 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1588 {
1589 struct dcb_app_type *itr;
1590 u8 prio = 0;
1591
1592 spin_lock(&dcb_lock);
1593 list_for_each_entry(itr, &dcb_app_list, list) {
1594 if (itr->app.selector == app->selector &&
1595 itr->app.protocol == app->protocol &&
1596 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1597 prio = itr->app.priority;
1598 break;
1599 }
1600 }
1601 spin_unlock(&dcb_lock);
1602
1603 return prio;
1604 }
1605 EXPORT_SYMBOL(dcb_getapp);
1606
1607 /**
1608 * ixgbe_dcbnl_setapp - add dcb application data to app list
1609 *
1610 * Priority 0 is the default priority this removes applications
1611 * from the app list if the priority is set to zero.
1612 */
1613 u8 dcb_setapp(struct net_device *dev, struct dcb_app *new)
1614 {
1615 struct dcb_app_type *itr;
1616
1617 spin_lock(&dcb_lock);
1618 /* Search for existing match and replace */
1619 list_for_each_entry(itr, &dcb_app_list, list) {
1620 if (itr->app.selector == new->selector &&
1621 itr->app.protocol == new->protocol &&
1622 (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1623 if (new->priority)
1624 itr->app.priority = new->priority;
1625 else {
1626 list_del(&itr->list);
1627 kfree(itr);
1628 }
1629 goto out;
1630 }
1631 }
1632 /* App type does not exist add new application type */
1633 if (new->priority) {
1634 struct dcb_app_type *entry;
1635 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
1636 if (!entry) {
1637 spin_unlock(&dcb_lock);
1638 return -ENOMEM;
1639 }
1640
1641 memcpy(&entry->app, new, sizeof(*new));
1642 strncpy(entry->name, dev->name, IFNAMSIZ);
1643 list_add(&entry->list, &dcb_app_list);
1644 }
1645 out:
1646 spin_unlock(&dcb_lock);
1647 call_dcbevent_notifiers(DCB_APP_EVENT, new);
1648 return 0;
1649 }
1650 EXPORT_SYMBOL(dcb_setapp);
1651
1652 static void dcb_flushapp(void)
1653 {
1654 struct dcb_app_type *app;
1655 struct dcb_app_type *tmp;
1656
1657 spin_lock(&dcb_lock);
1658 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1659 list_del(&app->list);
1660 kfree(app);
1661 }
1662 spin_unlock(&dcb_lock);
1663 }
1664
1665 static int __init dcbnl_init(void)
1666 {
1667 INIT_LIST_HEAD(&dcb_app_list);
1668
1669 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1670 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1671
1672 return 0;
1673 }
1674 module_init(dcbnl_init);
1675
1676 static void __exit dcbnl_exit(void)
1677 {
1678 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1679 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1680 dcb_flushapp();
1681 }
1682 module_exit(dcbnl_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree