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proc: fix pagemap_read() error case
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / dcb / dcbnl.c
blob3609eacaf4cedd332cf11e50a7af5096cc45bc26
1 /*
2 * Copyright (c) 2008-2011, 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);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree