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ixgbe: simplify padding and length checks
[linux-2.6-block.git] / net / dcb / dcbnl.c
CommitLineData
2f90b865 1/*
698e1d23 2 * Copyright (c) 2008-2011, Intel Corporation.
2f90b865
AD		 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>
5a0e3ad6 22#include <linux/slab.h>
2f90b865
AD		 23#include <net/netlink.h>
24#include <net/rtnetlink.h>
25#include <linux/dcbnl.h>
96b99684 26#include <net/dcbevent.h>
2f90b865 27#include <linux/rtnetlink.h>
3a9a231d 28#include <linux/module.h>
2f90b865
AD		 29#include <net/sock.h>
30
31/**
32 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
33 * intended to allow network traffic with differing requirements
34 * (highly reliable, no drops vs. best effort vs. low latency) to operate
35 * and co-exist on Ethernet. Current DCB features are:
36 *
37 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
38 * framework for assigning bandwidth guarantees to traffic classes.
39 *
40 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
41 * can work independently for each 802.1p priority.
42 *
43 * Congestion Notification - provides a mechanism for end-to-end congestion
44 * control for protocols which do not have built-in congestion management.
45 *
46 * More information about the emerging standards for these Ethernet features
47 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
48 *
49 * This file implements an rtnetlink interface to allow configuration of DCB
50 * features for capable devices.
51 */
52
53MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
7a6b6f51 54MODULE_DESCRIPTION("Data Center Bridging netlink interface");
2f90b865
AD		 55MODULE_LICENSE("GPL");
56
57/**************** DCB attribute policies *************************************/
58
59/* DCB netlink attributes policy */
b54452b0 60static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
859ee3c4
AD		 61 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
62 [DCB_ATTR_STATE] = {.type = NLA_U8},
63 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
64 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
65 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
2f90b865 66 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
859ee3c4
AD		 67 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
68 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
69 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
6fa382af 70 [DCB_ATTR_APP] = {.type = NLA_NESTED},
3e29027a 71 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
6241b625 72 [DCB_ATTR_DCBX] = {.type = NLA_U8},
ea45fe4e 73 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
2f90b865
AD		 74};
75
76/* DCB priority flow control to User Priority nested attributes */
b54452b0 77static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
2f90b865
AD		 78 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
85 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
86 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
87};
88
89/* DCB priority grouping nested attributes */
b54452b0 90static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
2f90b865
AD		 91 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
99 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
100 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
107 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
108 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
109};
110
111/* DCB traffic class nested attributes. */
b54452b0 112static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
2f90b865
AD		 113 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
116 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
117 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
118};
119
46132188 120/* DCB capabilities nested attributes. */
b54452b0 121static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
46132188
AD		 122 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
123 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
128 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
129 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
6241b625 130 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
46132188 131};
2f90b865 132
33dbabc4 133/* DCB capabilities nested attributes. */
b54452b0 134static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
33dbabc4
AD		 135 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
136 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
137 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
138};
139
859ee3c4 140/* DCB BCN nested attributes. */
b54452b0 141static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
859ee3c4
AD		 142 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
149 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
150 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
f4314e81
DS		 151 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
859ee3c4
AD		 153 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
165 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
166 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
167};
168
6fa382af 169/* DCB APP nested attributes. */
b54452b0 170static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
6fa382af
YZ		 171 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
172 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
173 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
174};
175
3e29027a
JF		 176/* IEEE 802.1Qaz nested attributes. */
177static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
178 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
179 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
180 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
08f10aff 181 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
3e29027a
JF		 182};
183
184static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
185 [DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
186};
187
ea45fe4e
SR		 188/* DCB number of traffic classes nested attributes. */
189static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
190 [DCB_FEATCFG_ATTR_ALL] = {.type = NLA_FLAG},
191 [DCB_FEATCFG_ATTR_PG] = {.type = NLA_U8},
192 [DCB_FEATCFG_ATTR_PFC] = {.type = NLA_U8},
193 [DCB_FEATCFG_ATTR_APP] = {.type = NLA_U8},
194};
195
9ab933ab
JF		 196static LIST_HEAD(dcb_app_list);
197static DEFINE_SPINLOCK(dcb_lock);
198
33a03aad
TG		 199static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
200 u32 flags, struct nlmsghdr **nlhp)
201{
202 struct sk_buff *skb;
203 struct dcbmsg *dcb;
204 struct nlmsghdr *nlh;
205
206 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
207 if (!skb)
208 return NULL;
209
210 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
b3908e22 211 BUG_ON(!nlh);
33a03aad
TG		 212
213 dcb = nlmsg_data(nlh);
214 dcb->dcb_family = AF_UNSPEC;
215 dcb->cmd = cmd;
216 dcb->dcb_pad = 0;
217
218 if (nlhp)
219 *nlhp = nlh;
220
221 return skb;
222}
223
7be99413
TG		 224static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
225 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 226{
2f90b865
AD		 227 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
228 if (!netdev->dcbnl_ops->getstate)
3d1f4869 229 return -EOPNOTSUPP;
2f90b865 230
7be99413
TG		 231 return nla_put_u8(skb, DCB_ATTR_STATE,
232 netdev->dcbnl_ops->getstate(netdev));
2f90b865
AD		 233}
234
7be99413
TG		 235static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
236 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 237{
2f90b865
AD		 238 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
239 u8 value;
3d1f4869 240 int ret;
2f90b865
AD		 241 int i;
242 int getall = 0;
243
3d1f4869
TG		 244 if (!tb[DCB_ATTR_PFC_CFG])
245 return -EINVAL;
246
247 if (!netdev->dcbnl_ops->getpfccfg)
248 return -EOPNOTSUPP;
2f90b865
AD		 249
250 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
251 tb[DCB_ATTR_PFC_CFG],
252 dcbnl_pfc_up_nest);
253 if (ret)
3d1f4869 254 return ret;
2f90b865 255
7be99413 256 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
2f90b865 257 if (!nest)
3d1f4869 258 return -EMSGSIZE;
2f90b865
AD		 259
260 if (data[DCB_PFC_UP_ATTR_ALL])
261 getall = 1;
262
263 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
264 if (!getall && !data[i])
265 continue;
266
267 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
268 &value);
7be99413 269 ret = nla_put_u8(skb, i, value);
2f90b865 270 if (ret) {
7be99413 271 nla_nest_cancel(skb, nest);
3d1f4869 272 return ret;
2f90b865
AD		 273 }
274 }
7be99413 275 nla_nest_end(skb, nest);
2f90b865
AD		 276
277 return 0;
2f90b865
AD		 278}
279
7be99413
TG		 280static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
281 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 282{
2f90b865 283 u8 perm_addr[MAX_ADDR_LEN];
2f90b865
AD		 284
285 if (!netdev->dcbnl_ops->getpermhwaddr)
3d1f4869 286 return -EOPNOTSUPP;
2f90b865
AD		 287
288 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
289
7be99413 290 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
2f90b865
AD		 291}
292
7be99413
TG		 293static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
294 u32 seq, struct nlattr **tb, struct sk_buff *skb)
46132188 295{
46132188
AD		 296 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
297 u8 value;
3d1f4869 298 int ret;
46132188
AD		 299 int i;
300 int getall = 0;
301
3d1f4869
TG		 302 if (!tb[DCB_ATTR_CAP])
303 return -EINVAL;
304
305 if (!netdev->dcbnl_ops->getcap)
306 return -EOPNOTSUPP;
46132188
AD		 307
308 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
309 dcbnl_cap_nest);
310 if (ret)
3d1f4869 311 return ret;
46132188 312
7be99413 313 nest = nla_nest_start(skb, DCB_ATTR_CAP);
46132188 314 if (!nest)
3d1f4869 315 return -EMSGSIZE;
46132188
AD		 316
317 if (data[DCB_CAP_ATTR_ALL])
318 getall = 1;
319
320 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
321 if (!getall && !data[i])
322 continue;
323
324 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
7be99413 325 ret = nla_put_u8(skb, i, value);
46132188 326 if (ret) {
7be99413 327 nla_nest_cancel(skb, nest);
3d1f4869 328 return ret;
46132188
AD		 329 }
330 }
331 }
7be99413 332 nla_nest_end(skb, nest);
46132188
AD		 333
334 return 0;
46132188
AD		 335}
336
7be99413
TG		 337static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
338 u32 seq, struct nlattr **tb, struct sk_buff *skb)
33dbabc4 339{
33dbabc4
AD		 340 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
341 u8 value;
3d1f4869 342 int ret;
33dbabc4
AD		 343 int i;
344 int getall = 0;
345
3d1f4869
TG		 346 if (!tb[DCB_ATTR_NUMTCS])
347 return -EINVAL;
348
349 if (!netdev->dcbnl_ops->getnumtcs)
350 return -EOPNOTSUPP;
33dbabc4
AD		 351
352 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
353 dcbnl_numtcs_nest);
3d1f4869
TG		 354 if (ret)
355 return ret;
33dbabc4 356
7be99413 357 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
3d1f4869
TG		 358 if (!nest)
359 return -EMSGSIZE;
33dbabc4
AD		 360
361 if (data[DCB_NUMTCS_ATTR_ALL])
362 getall = 1;
363
364 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
365 if (!getall && !data[i])
366 continue;
367
368 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
369 if (!ret) {
7be99413 370 ret = nla_put_u8(skb, i, value);
33dbabc4 371 if (ret) {
7be99413 372 nla_nest_cancel(skb, nest);
3d1f4869 373 return ret;
33dbabc4 374 }
3d1f4869
TG		 375 } else
376 return -EINVAL;
33dbabc4 377 }
7be99413 378 nla_nest_end(skb, nest);
33dbabc4
AD		 379
380 return 0;
33dbabc4
AD		 381}
382
7be99413
TG		 383static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
384 u32 seq, struct nlattr **tb, struct sk_buff *skb)
33dbabc4
AD		 385{
386 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
3d1f4869 387 int ret;
33dbabc4
AD		 388 u8 value;
389 int i;
390
3d1f4869
TG		 391 if (!tb[DCB_ATTR_NUMTCS])
392 return -EINVAL;
393
394 if (!netdev->dcbnl_ops->setnumtcs)
395 return -EOPNOTSUPP;
33dbabc4
AD		 396
397 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
398 dcbnl_numtcs_nest);
7be99413 399 if (ret)
3d1f4869 400 return ret;
33dbabc4
AD		 401
402 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
403 if (data[i] == NULL)
404 continue;
405
406 value = nla_get_u8(data[i]);
407
408 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
33dbabc4 409 if (ret)
7be99413 410 break;
33dbabc4
AD		 411 }
412
7be99413 413 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
33dbabc4
AD		 414}
415
7be99413
TG		 416static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
417 u32 seq, struct nlattr **tb, struct sk_buff *skb)
0eb3aa9b 418{
0eb3aa9b 419 if (!netdev->dcbnl_ops->getpfcstate)
3d1f4869 420 return -EOPNOTSUPP;
0eb3aa9b 421
7be99413
TG		 422 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
423 netdev->dcbnl_ops->getpfcstate(netdev));
0eb3aa9b
AD		 424}
425
7be99413
TG		 426static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
427 u32 seq, struct nlattr **tb, struct sk_buff *skb)
0eb3aa9b 428{
0eb3aa9b
AD		 429 u8 value;
430
3d1f4869 431 if (!tb[DCB_ATTR_PFC_STATE])
7be99413 432 return -EINVAL;
0eb3aa9b 433
3d1f4869
TG		 434 if (!netdev->dcbnl_ops->setpfcstate)
435 return -EOPNOTSUPP;
436
0eb3aa9b
AD		 437 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
438
439 netdev->dcbnl_ops->setpfcstate(netdev, value);
440
7be99413 441 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
0eb3aa9b
AD		 442}
443
7be99413
TG		 444static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
445 u32 seq, struct nlattr **tb, struct sk_buff *skb)
57949686 446{
57949686
YZ		 447 struct nlattr *app_nest;
448 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
449 u16 id;
450 u8 up, idtype;
3d1f4869 451 int ret;
57949686 452
3dce38a0 453 if (!tb[DCB_ATTR_APP])
3d1f4869 454 return -EINVAL;
57949686
YZ		 455
456 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
457 dcbnl_app_nest);
458 if (ret)
3d1f4869 459 return ret;
57949686 460
57949686
YZ		 461 /* all must be non-null */
462 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
463 (!app_tb[DCB_APP_ATTR_ID]))
3d1f4869 464 return -EINVAL;
57949686
YZ		 465
466 /* either by eth type or by socket number */
467 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
468 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
469 (idtype != DCB_APP_IDTYPE_PORTNUM))
3d1f4869 470 return -EINVAL;
57949686
YZ		 471
472 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
3dce38a0
JF		 473
474 if (netdev->dcbnl_ops->getapp) {
475 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
476 } else {
477 struct dcb_app app = {
478 .selector = idtype,
479 .protocol = id,
480 };
481 up = dcb_getapp(netdev, &app);
482 }
57949686 483
7be99413 484 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
d3337de5 485 if (!app_nest)
3d1f4869 486 return -EMSGSIZE;
d3337de5 487
7be99413 488 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
57949686
YZ		 489 if (ret)
490 goto out_cancel;
491
7be99413 492 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
57949686
YZ		 493 if (ret)
494 goto out_cancel;
495
7be99413 496 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
57949686
YZ		 497 if (ret)
498 goto out_cancel;
499
7be99413 500 nla_nest_end(skb, app_nest);
57949686 501
3d1f4869 502 return 0;
57949686
YZ		 503
504out_cancel:
7be99413 505 nla_nest_cancel(skb, app_nest);
57949686
YZ		 506 return ret;
507}
508
7be99413
TG		 509static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
510 u32 seq, struct nlattr **tb, struct sk_buff *skb)
57949686 511{
3d1f4869 512 int ret;
57949686
YZ		 513 u16 id;
514 u8 up, idtype;
515 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
516
9ab933ab 517 if (!tb[DCB_ATTR_APP])
3d1f4869 518 return -EINVAL;
57949686
YZ		 519
520 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
521 dcbnl_app_nest);
522 if (ret)
3d1f4869 523 return ret;
57949686 524
57949686
YZ		 525 /* all must be non-null */
526 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
527 (!app_tb[DCB_APP_ATTR_ID]) ||
528 (!app_tb[DCB_APP_ATTR_PRIORITY]))
3d1f4869 529 return -EINVAL;
57949686
YZ		 530
531 /* either by eth type or by socket number */
532 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
533 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
534 (idtype != DCB_APP_IDTYPE_PORTNUM))
3d1f4869 535 return -EINVAL;
57949686
YZ		 536
537 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
538 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
539
9ab933ab 540 if (netdev->dcbnl_ops->setapp) {
3d1f4869 541 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
9ab933ab
JF		 542 } else {
543 struct dcb_app app;
544 app.selector = idtype;
545 app.protocol = id;
546 app.priority = up;
3d1f4869 547 ret = dcb_setapp(netdev, &app);
9ab933ab
JF		 548 }
549
7be99413 550 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
08157984 551 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
3d1f4869 552
57949686
YZ		 553 return ret;
554}
555
7be99413
TG		 556static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
557 struct nlattr **tb, struct sk_buff *skb, int dir)
2f90b865 558{
2f90b865
AD		 559 struct nlattr *pg_nest, *param_nest, *data;
560 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
561 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
562 u8 prio, pgid, tc_pct, up_map;
3d1f4869 563 int ret;
2f90b865
AD		 564 int getall = 0;
565 int i;
566
3d1f4869
TG		 567 if (!tb[DCB_ATTR_PG_CFG])
568 return -EINVAL;
569
570 if (!netdev->dcbnl_ops->getpgtccfgtx ||
2f90b865
AD		 571 !netdev->dcbnl_ops->getpgtccfgrx ||
572 !netdev->dcbnl_ops->getpgbwgcfgtx ||
573 !netdev->dcbnl_ops->getpgbwgcfgrx)
3d1f4869 574 return -EOPNOTSUPP;
2f90b865
AD		 575
576 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
577 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
2f90b865 578 if (ret)
3d1f4869 579 return ret;
2f90b865 580
7be99413 581 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
2f90b865 582 if (!pg_nest)
3d1f4869 583 return -EMSGSIZE;
2f90b865
AD		 584
585 if (pg_tb[DCB_PG_ATTR_TC_ALL])
586 getall = 1;
587
588 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
589 if (!getall && !pg_tb[i])
590 continue;
591
592 if (pg_tb[DCB_PG_ATTR_TC_ALL])
593 data = pg_tb[DCB_PG_ATTR_TC_ALL];
594 else
595 data = pg_tb[i];
596 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
597 data, dcbnl_tc_param_nest);
598 if (ret)
599 goto err_pg;
600
7be99413 601 param_nest = nla_nest_start(skb, i);
2f90b865
AD		 602 if (!param_nest)
603 goto err_pg;
604
605 pgid = DCB_ATTR_VALUE_UNDEFINED;
606 prio = DCB_ATTR_VALUE_UNDEFINED;
607 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
608 up_map = DCB_ATTR_VALUE_UNDEFINED;
609
610 if (dir) {
611 /* Rx */
612 netdev->dcbnl_ops->getpgtccfgrx(netdev,
613 i - DCB_PG_ATTR_TC_0, &prio,
614 &pgid, &tc_pct, &up_map);
615 } else {
616 /* Tx */
617 netdev->dcbnl_ops->getpgtccfgtx(netdev,
618 i - DCB_PG_ATTR_TC_0, &prio,
619 &pgid, &tc_pct, &up_map);
620 }
621
622 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
623 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
7be99413 624 ret = nla_put_u8(skb,
2f90b865
AD		 625 DCB_TC_ATTR_PARAM_PGID, pgid);
626 if (ret)
627 goto err_param;
628 }
629 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
630 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
7be99413 631 ret = nla_put_u8(skb,
2f90b865
AD		 632 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
633 if (ret)
634 goto err_param;
635 }
636 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
637 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
7be99413 638 ret = nla_put_u8(skb,
2f90b865
AD		 639 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
640 if (ret)
641 goto err_param;
642 }
643 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
644 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
7be99413 645 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
2f90b865
AD		 646 tc_pct);
647 if (ret)
648 goto err_param;
649 }
7be99413 650 nla_nest_end(skb, param_nest);
2f90b865
AD		 651 }
652
653 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
654 getall = 1;
655 else
656 getall = 0;
657
658 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
659 if (!getall && !pg_tb[i])
660 continue;
661
662 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
663
664 if (dir) {
665 /* Rx */
666 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
667 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
668 } else {
669 /* Tx */
670 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
671 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
672 }
7be99413 673 ret = nla_put_u8(skb, i, tc_pct);
2f90b865
AD		 674 if (ret)
675 goto err_pg;
676 }
677
7be99413 678 nla_nest_end(skb, pg_nest);
2f90b865
AD		 679
680 return 0;
681
682err_param:
7be99413 683 nla_nest_cancel(skb, param_nest);
2f90b865 684err_pg:
7be99413 685 nla_nest_cancel(skb, pg_nest);
3d1f4869
TG		 686
687 return -EMSGSIZE;
2f90b865
AD		 688}
689
7be99413
TG		 690static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
691 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 692{
7be99413 693 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
2f90b865
AD		 694}
695
7be99413
TG		 696static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
697 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 698{
7be99413 699 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
2f90b865
AD		 700}
701
7be99413
TG		 702static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
703 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 704{
2f90b865
AD		 705 u8 value;
706
3d1f4869 707 if (!tb[DCB_ATTR_STATE])
7be99413 708 return -EINVAL;
2f90b865 709
3d1f4869
TG		 710 if (!netdev->dcbnl_ops->setstate)
711 return -EOPNOTSUPP;
712
2f90b865
AD		 713 value = nla_get_u8(tb[DCB_ATTR_STATE]);
714
7be99413
TG		 715 return nla_put_u8(skb, DCB_ATTR_STATE,
716 netdev->dcbnl_ops->setstate(netdev, value));
2f90b865
AD		 717}
718
7be99413
TG		 719static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
720 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865
AD		 721{
722 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
723 int i;
3d1f4869 724 int ret;
2f90b865
AD		 725 u8 value;
726
3d1f4869
TG		 727 if (!tb[DCB_ATTR_PFC_CFG])
728 return -EINVAL;
729
730 if (!netdev->dcbnl_ops->setpfccfg)
731 return -EOPNOTSUPP;
2f90b865
AD		 732
733 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
734 tb[DCB_ATTR_PFC_CFG],
735 dcbnl_pfc_up_nest);
736 if (ret)
3d1f4869 737 return ret;
2f90b865
AD		 738
739 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
740 if (data[i] == NULL)
741 continue;
742 value = nla_get_u8(data[i]);
743 netdev->dcbnl_ops->setpfccfg(netdev,
744 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
745 }
746
7be99413 747 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
2f90b865
AD		 748}
749
7be99413
TG		 750static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
751 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 752{
3d1f4869 753 int ret;
2f90b865 754
3d1f4869
TG		 755 if (!tb[DCB_ATTR_SET_ALL])
756 return -EINVAL;
757
758 if (!netdev->dcbnl_ops->setall)
759 return -EOPNOTSUPP;
2f90b865 760
7be99413
TG		 761 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
762 netdev->dcbnl_ops->setall(netdev));
08157984 763 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
2f90b865
AD		 764
765 return ret;
766}
767
7be99413
TG		 768static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
769 u32 seq, struct nlattr **tb, struct sk_buff *skb,
770 int dir)
2f90b865
AD		 771{
772 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
773 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
3d1f4869 774 int ret;
2f90b865
AD		 775 int i;
776 u8 pgid;
777 u8 up_map;
778 u8 prio;
779 u8 tc_pct;
780
3d1f4869
TG		 781 if (!tb[DCB_ATTR_PG_CFG])
782 return -EINVAL;
783
784 if (!netdev->dcbnl_ops->setpgtccfgtx ||
2f90b865
AD		 785 !netdev->dcbnl_ops->setpgtccfgrx ||
786 !netdev->dcbnl_ops->setpgbwgcfgtx ||
787 !netdev->dcbnl_ops->setpgbwgcfgrx)
3d1f4869 788 return -EOPNOTSUPP;
2f90b865
AD		 789
790 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
791 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
792 if (ret)
3d1f4869 793 return ret;
2f90b865
AD		 794
795 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
796 if (!pg_tb[i])
797 continue;
798
799 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
800 pg_tb[i], dcbnl_tc_param_nest);
801 if (ret)
3d1f4869 802 return ret;
2f90b865
AD		 803
804 pgid = DCB_ATTR_VALUE_UNDEFINED;
805 prio = DCB_ATTR_VALUE_UNDEFINED;
806 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
807 up_map = DCB_ATTR_VALUE_UNDEFINED;
808
809 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
810 prio =
811 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
812
813 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
814 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
815
816 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
817 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
818
819 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
820 up_map =
821 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
822
823 /* dir: Tx = 0, Rx = 1 */
824 if (dir) {
825 /* Rx */
826 netdev->dcbnl_ops->setpgtccfgrx(netdev,
827 i - DCB_PG_ATTR_TC_0,
828 prio, pgid, tc_pct, up_map);
829 } else {
830 /* Tx */
831 netdev->dcbnl_ops->setpgtccfgtx(netdev,
832 i - DCB_PG_ATTR_TC_0,
833 prio, pgid, tc_pct, up_map);
834 }
835 }
836
837 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
838 if (!pg_tb[i])
839 continue;
840
841 tc_pct = nla_get_u8(pg_tb[i]);
842
843 /* dir: Tx = 0, Rx = 1 */
844 if (dir) {
845 /* Rx */
846 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
847 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
848 } else {
849 /* Tx */
850 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
851 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
852 }
853 }
854
3d1f4869
TG		 855 return nla_put_u8(skb,
856 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG), 0);
2f90b865
AD		 857}
858
7be99413
TG		 859static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
860 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 861{
7be99413 862 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
2f90b865
AD		 863}
864
7be99413
TG		 865static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
866 u32 seq, struct nlattr **tb, struct sk_buff *skb)
2f90b865 867{
7be99413 868 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
2f90b865
AD		 869}
870
7be99413
TG		 871static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
872 u32 seq, struct nlattr **tb, struct sk_buff *skb)
859ee3c4 873{
859ee3c4
AD		 874 struct nlattr *bcn_nest;
875 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
876 u8 value_byte;
877 u32 value_integer;
3d1f4869 878 int ret;
859ee3c4
AD		 879 bool getall = false;
880 int i;
881
3d1f4869
TG		 882 if (!tb[DCB_ATTR_BCN])
883 return -EINVAL;
884
885 if (!netdev->dcbnl_ops->getbcnrp ||
859ee3c4 886 !netdev->dcbnl_ops->getbcncfg)
3d1f4869 887 return -EOPNOTSUPP;
859ee3c4
AD		 888
889 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
890 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
859ee3c4 891 if (ret)
3d1f4869 892 return ret;
859ee3c4 893
7be99413 894 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
859ee3c4 895 if (!bcn_nest)
3d1f4869 896 return -EMSGSIZE;
859ee3c4
AD		 897
898 if (bcn_tb[DCB_BCN_ATTR_ALL])
899 getall = true;
900
901 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
902 if (!getall && !bcn_tb[i])
903 continue;
904
905 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
906 &value_byte);
7be99413 907 ret = nla_put_u8(skb, i, value_byte);
859ee3c4
AD		 908 if (ret)
909 goto err_bcn;
910 }
911
f4314e81 912 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
859ee3c4
AD		 913 if (!getall && !bcn_tb[i])
914 continue;
915
916 netdev->dcbnl_ops->getbcncfg(netdev, i,
917 &value_integer);
7be99413 918 ret = nla_put_u32(skb, i, value_integer);
859ee3c4
AD		 919 if (ret)
920 goto err_bcn;
921 }
922
7be99413 923 nla_nest_end(skb, bcn_nest);
859ee3c4
AD		 924
925 return 0;
926
927err_bcn:
7be99413 928 nla_nest_cancel(skb, bcn_nest);
859ee3c4
AD		 929 return ret;
930}
931
7be99413
TG		 932static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
933 u32 seq, struct nlattr **tb, struct sk_buff *skb)
859ee3c4
AD		 934{
935 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
936 int i;
3d1f4869 937 int ret;
859ee3c4
AD		 938 u8 value_byte;
939 u32 value_int;
940
3d1f4869
TG		 941 if (!tb[DCB_ATTR_BCN])
942 return -EINVAL;
943
944 if (!netdev->dcbnl_ops->setbcncfg ||
f64f9e71 945 !netdev->dcbnl_ops->setbcnrp)
3d1f4869 946 return -EOPNOTSUPP;
859ee3c4
AD		 947
948 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
949 tb[DCB_ATTR_BCN],
950 dcbnl_pfc_up_nest);
951 if (ret)
3d1f4869 952 return ret;
859ee3c4
AD		 953
954 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
955 if (data[i] == NULL)
956 continue;
957 value_byte = nla_get_u8(data[i]);
958 netdev->dcbnl_ops->setbcnrp(netdev,
959 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
960 }
961
f4314e81 962 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
859ee3c4
AD		 963 if (data[i] == NULL)
964 continue;
965 value_int = nla_get_u32(data[i]);
966 netdev->dcbnl_ops->setbcncfg(netdev,
967 i, value_int);
968 }
969
3d1f4869 970 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
859ee3c4
AD		 971}
972
dc6ed1df
SR		 973static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
974 int app_nested_type, int app_info_type,
975 int app_entry_type)
eed84713
SR		 976{
977 struct dcb_peer_app_info info;
978 struct dcb_app *table = NULL;
979 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
980 u16 app_count;
981 int err;
982
983
984 /**
985 * retrieve the peer app configuration form the driver. If the driver
986 * handlers fail exit without doing anything
987 */
988 err = ops->peer_getappinfo(netdev, &info, &app_count);
989 if (!err && app_count) {
990 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
991 if (!table)
992 return -ENOMEM;
993
994 err = ops->peer_getapptable(netdev, table);
995 }
996
997 if (!err) {
998 u16 i;
999 struct nlattr *app;
1000
1001 /**
1002 * build the message, from here on the only possible failure
1003 * is due to the skb size
1004 */
1005 err = -EMSGSIZE;
1006
dc6ed1df 1007 app = nla_nest_start(skb, app_nested_type);
eed84713
SR		 1008 if (!app)
1009 goto nla_put_failure;
1010
1eb4c977
DM		 1011 if (app_info_type &&
1012 nla_put(skb, app_info_type, sizeof(info), &info))
1013 goto nla_put_failure;
eed84713 1014
1eb4c977
DM		 1015 for (i = 0; i < app_count; i++) {
1016 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1017 &table[i]))
1018 goto nla_put_failure;
1019 }
eed84713
SR		 1020 nla_nest_end(skb, app);
1021 }
1022 err = 0;
1023
1024nla_put_failure:
1025 kfree(table);
1026 return err;
1027}
3e29027a
JF		 1028
1029/* Handle IEEE 802.1Qaz GET commands. */
314b4778 1030static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
3e29027a 1031{
9ab933ab
JF		 1032 struct nlattr *ieee, *app;
1033 struct dcb_app_type *itr;
3e29027a 1034 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
c7797baf 1035 int dcbx;
3d1f4869 1036 int err;
3e29027a 1037
1eb4c977 1038 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
3d1f4869
TG		 1039 return -EMSGSIZE;
1040
3e29027a
JF		 1041 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1042 if (!ieee)
3d1f4869 1043 return -EMSGSIZE;
3e29027a
JF		 1044
1045 if (ops->ieee_getets) {
1046 struct ieee_ets ets;
1047 err = ops->ieee_getets(netdev, &ets);
1eb4c977
DM		 1048 if (!err &&
1049 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
3d1f4869 1050 return -EMSGSIZE;
3e29027a
JF		 1051 }
1052
08f10aff
AV		 1053 if (ops->ieee_getmaxrate) {
1054 struct ieee_maxrate maxrate;
1055 err = ops->ieee_getmaxrate(netdev, &maxrate);
1056 if (!err) {
1057 err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1058 sizeof(maxrate), &maxrate);
1059 if (err)
3d1f4869 1060 return -EMSGSIZE;
08f10aff
AV		 1061 }
1062 }
1063
3e29027a
JF		 1064 if (ops->ieee_getpfc) {
1065 struct ieee_pfc pfc;
1066 err = ops->ieee_getpfc(netdev, &pfc);
1eb4c977
DM		 1067 if (!err &&
1068 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
3d1f4869 1069 return -EMSGSIZE;
3e29027a
JF		 1070 }
1071
9ab933ab
JF		 1072 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1073 if (!app)
3d1f4869 1074 return -EMSGSIZE;
9ab933ab
JF		 1075
1076 spin_lock(&dcb_lock);
1077 list_for_each_entry(itr, &dcb_app_list, list) {
e290ed81 1078 if (itr->ifindex == netdev->ifindex) {
70bfa2d2
DC		 1079 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1080 &itr->app);
1081 if (err) {
1082 spin_unlock(&dcb_lock);
3d1f4869 1083 return -EMSGSIZE;
70bfa2d2
DC		 1084 }
1085 }
9ab933ab 1086 }
c7797baf
JF		 1087
1088 if (netdev->dcbnl_ops->getdcbx)
1089 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1090 else
1091 dcbx = -EOPNOTSUPP;
1092
9ab933ab
JF		 1093 spin_unlock(&dcb_lock);
1094 nla_nest_end(skb, app);
1095
eed84713
SR		 1096 /* get peer info if available */
1097 if (ops->ieee_peer_getets) {
1098 struct ieee_ets ets;
1099 err = ops->ieee_peer_getets(netdev, &ets);
1eb4c977
DM		 1100 if (!err &&
1101 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
3d1f4869 1102 return -EMSGSIZE;
eed84713
SR		 1103 }
1104
1105 if (ops->ieee_peer_getpfc) {
1106 struct ieee_pfc pfc;
1107 err = ops->ieee_peer_getpfc(netdev, &pfc);
1eb4c977
DM		 1108 if (!err &&
1109 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
3d1f4869 1110 return -EMSGSIZE;
eed84713
SR		 1111 }
1112
1113 if (ops->peer_getappinfo && ops->peer_getapptable) {
dc6ed1df
SR		 1114 err = dcbnl_build_peer_app(netdev, skb,
1115 DCB_ATTR_IEEE_PEER_APP,
1116 DCB_ATTR_IEEE_APP_UNSPEC,
1117 DCB_ATTR_IEEE_APP);
eed84713 1118 if (err)
3d1f4869 1119 return -EMSGSIZE;
eed84713
SR		 1120 }
1121
3e29027a 1122 nla_nest_end(skb, ieee);
c7797baf
JF		 1123 if (dcbx >= 0) {
1124 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1125 if (err)
3d1f4869 1126 return -EMSGSIZE;
c7797baf 1127 }
3e29027a 1128
314b4778 1129 return 0;
3e29027a
JF		 1130}
1131
5b7f7626
SR		 1132static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1133 int dir)
1134{
1135 u8 pgid, up_map, prio, tc_pct;
1136 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1137 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1138 struct nlattr *pg = nla_nest_start(skb, i);
1139
1140 if (!pg)
3d1f4869 1141 return -EMSGSIZE;
5b7f7626
SR		 1142
1143 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1144 struct nlattr *tc_nest = nla_nest_start(skb, i);
1145
1146 if (!tc_nest)
3d1f4869 1147 return -EMSGSIZE;
5b7f7626
SR		 1148
1149 pgid = DCB_ATTR_VALUE_UNDEFINED;
1150 prio = DCB_ATTR_VALUE_UNDEFINED;
1151 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1152 up_map = DCB_ATTR_VALUE_UNDEFINED;
1153
1154 if (!dir)
1155 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1156 &prio, &pgid, &tc_pct, &up_map);
1157 else
1158 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1159 &prio, &pgid, &tc_pct, &up_map);
1160
1eb4c977
DM		 1161 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1162 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1163 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1164 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
3d1f4869 1165 return -EMSGSIZE;
5b7f7626
SR		 1166 nla_nest_end(skb, tc_nest);
1167 }
1168
1169 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1170 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1171
1172 if (!dir)
1173 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1174 &tc_pct);
1175 else
1176 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1177 &tc_pct);
1eb4c977 1178 if (nla_put_u8(skb, i, tc_pct))
3d1f4869 1179 return -EMSGSIZE;
5b7f7626
SR		 1180 }
1181 nla_nest_end(skb, pg);
1182 return 0;
5b7f7626
SR		 1183}
1184
1185static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1186{
1187 struct nlattr *cee, *app;
1188 struct dcb_app_type *itr;
1189 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1190 int dcbx, i, err = -EMSGSIZE;
1191 u8 value;
1192
1eb4c977
DM		 1193 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1194 goto nla_put_failure;
5b7f7626
SR		 1195 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1196 if (!cee)
1197 goto nla_put_failure;
1198
1199 /* local pg */
1200 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1201 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1202 if (err)
1203 goto nla_put_failure;
1204 }
1205
1206 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1207 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1208 if (err)
1209 goto nla_put_failure;
1210 }
1211
1212 /* local pfc */
1213 if (ops->getpfccfg) {
1214 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1215
1216 if (!pfc_nest)
1217 goto nla_put_failure;
1218
1219 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1220 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1eb4c977
DM		 1221 if (nla_put_u8(skb, i, value))
1222 goto nla_put_failure;
5b7f7626
SR		 1223 }
1224 nla_nest_end(skb, pfc_nest);
1225 }
1226
1227 /* local app */
1228 spin_lock(&dcb_lock);
1229 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1230 if (!app)
40f5d72a 1231 goto dcb_unlock;
5b7f7626
SR		 1232
1233 list_for_each_entry(itr, &dcb_app_list, list) {
e290ed81 1234 if (itr->ifindex == netdev->ifindex) {
5b7f7626
SR		 1235 struct nlattr *app_nest = nla_nest_start(skb,
1236 DCB_ATTR_APP);
1237 if (!app_nest)
1238 goto dcb_unlock;
1239
1240 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1241 itr->app.selector);
1242 if (err)
1243 goto dcb_unlock;
1244
1245 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1246 itr->app.protocol);
1247 if (err)
1248 goto dcb_unlock;
1249
1250 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1251 itr->app.priority);
1252 if (err)
1253 goto dcb_unlock;
1254
1255 nla_nest_end(skb, app_nest);
1256 }
1257 }
1258 nla_nest_end(skb, app);
1259
1260 if (netdev->dcbnl_ops->getdcbx)
1261 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1262 else
1263 dcbx = -EOPNOTSUPP;
1264
1265 spin_unlock(&dcb_lock);
1266
1267 /* features flags */
1268 if (ops->getfeatcfg) {
1269 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1270 if (!feat)
1271 goto nla_put_failure;
1272
1273 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1274 i++)
1eb4c977
DM		 1275 if (!ops->getfeatcfg(netdev, i, &value) &&
1276 nla_put_u8(skb, i, value))
1277 goto nla_put_failure;
5b7f7626
SR		 1278
1279 nla_nest_end(skb, feat);
1280 }
1281
1282 /* peer info if available */
1283 if (ops->cee_peer_getpg) {
1284 struct cee_pg pg;
1285 err = ops->cee_peer_getpg(netdev, &pg);
1eb4c977
DM		 1286 if (!err &&
1287 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1288 goto nla_put_failure;
5b7f7626
SR		 1289 }
1290
1291 if (ops->cee_peer_getpfc) {
1292 struct cee_pfc pfc;
1293 err = ops->cee_peer_getpfc(netdev, &pfc);
1eb4c977
DM		 1294 if (!err &&
1295 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1296 goto nla_put_failure;
5b7f7626
SR		 1297 }
1298
1299 if (ops->peer_getappinfo && ops->peer_getapptable) {
1300 err = dcbnl_build_peer_app(netdev, skb,
1301 DCB_ATTR_CEE_PEER_APP_TABLE,
1302 DCB_ATTR_CEE_PEER_APP_INFO,
1303 DCB_ATTR_CEE_PEER_APP);
1304 if (err)
1305 goto nla_put_failure;
1306 }
1307 nla_nest_end(skb, cee);
1308
1309 /* DCBX state */
1310 if (dcbx >= 0) {
1311 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1312 if (err)
1313 goto nla_put_failure;
1314 }
1315 return 0;
1316
1317dcb_unlock:
1318 spin_unlock(&dcb_lock);
1319nla_put_failure:
1320 return err;
1321}
1322
1323static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1324 u32 seq, u32 pid, int dcbx_ver)
314b4778
JF		 1325{
1326 struct net *net = dev_net(dev);
1327 struct sk_buff *skb;
1328 struct nlmsghdr *nlh;
314b4778
JF		 1329 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1330 int err;
1331
1332 if (!ops)
1333 return -EOPNOTSUPP;
1334
ab6d4707 1335 skb = dcbnl_newmsg(event, cmd, pid, seq, 0, &nlh);
314b4778
JF		 1336 if (!skb)
1337 return -ENOBUFS;
1338
5b7f7626
SR		 1339 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1340 err = dcbnl_ieee_fill(skb, dev);
1341 else
1342 err = dcbnl_cee_fill(skb, dev);
1343
314b4778
JF		 1344 if (err < 0) {
1345 /* Report error to broadcast listeners */
ab6d4707 1346 nlmsg_free(skb);
314b4778
JF		 1347 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1348 } else {
1349 /* End nlmsg and notify broadcast listeners */
1350 nlmsg_end(skb, nlh);
1351 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1352 }
1353
1354 return err;
1355}
5b7f7626
SR		 1356
1357int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1358 u32 seq, u32 pid)
1359{
1360 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_IEEE);
1361}
1362EXPORT_SYMBOL(dcbnl_ieee_notify);
1363
1364int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1365 u32 seq, u32 pid)
1366{
1367 return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_CEE);
1368}
1369EXPORT_SYMBOL(dcbnl_cee_notify);
314b4778
JF		 1370
1371/* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1372 * be completed the entire msg is aborted and error value is returned.
1373 * No attempt is made to reconcile the case where only part of the
1374 * cmd can be completed.
1375 */
7be99413
TG		 1376static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1377 u32 seq, struct nlattr **tb, struct sk_buff *skb)
314b4778
JF		 1378{
1379 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1380 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
3d1f4869 1381 int err;
314b4778
JF		 1382
1383 if (!ops)
3d1f4869 1384 return -EOPNOTSUPP;
314b4778 1385
4003b658
JF		 1386 if (!tb[DCB_ATTR_IEEE])
1387 return -EINVAL;
1388
314b4778
JF		 1389 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1390 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1391 if (err)
1392 return err;
1393
1394 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1395 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1396 err = ops->ieee_setets(netdev, ets);
1397 if (err)
1398 goto err;
1399 }
1400
08f10aff
AV		 1401 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1402 struct ieee_maxrate *maxrate =
1403 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1404 err = ops->ieee_setmaxrate(netdev, maxrate);
1405 if (err)
1406 goto err;
1407 }
1408
314b4778
JF		 1409 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1410 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1411 err = ops->ieee_setpfc(netdev, pfc);
1412 if (err)
1413 goto err;
1414 }
1415
1416 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1417 struct nlattr *attr;
1418 int rem;
1419
1420 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1421 struct dcb_app *app_data;
1422 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1423 continue;
1424 app_data = nla_data(attr);
1425 if (ops->ieee_setapp)
1426 err = ops->ieee_setapp(netdev, app_data);
1427 else
b6db2174 1428 err = dcb_ieee_setapp(netdev, app_data);
314b4778
JF		 1429 if (err)
1430 goto err;
1431 }
1432 }
1433
1434err:
7be99413 1435 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
5b7f7626 1436 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
314b4778
JF		 1437 return err;
1438}
1439
7be99413
TG		 1440static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1441 u32 seq, struct nlattr **tb, struct sk_buff *skb)
314b4778 1442{
314b4778 1443 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
314b4778
JF		 1444
1445 if (!ops)
1446 return -EOPNOTSUPP;
1447
7be99413 1448 return dcbnl_ieee_fill(skb, netdev);
314b4778 1449}
f9ae7e4b 1450
7be99413
TG		 1451static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1452 u32 seq, struct nlattr **tb, struct sk_buff *skb)
f9ae7e4b
JF		 1453{
1454 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1455 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
3d1f4869 1456 int err;
f9ae7e4b
JF		 1457
1458 if (!ops)
1459 return -EOPNOTSUPP;
1460
1461 if (!tb[DCB_ATTR_IEEE])
1462 return -EINVAL;
1463
1464 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1465 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1466 if (err)
1467 return err;
1468
1469 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1470 struct nlattr *attr;
1471 int rem;
1472
1473 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1474 struct dcb_app *app_data;
1475
1476 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1477 continue;
1478 app_data = nla_data(attr);
1479 if (ops->ieee_delapp)
1480 err = ops->ieee_delapp(netdev, app_data);
1481 else
1482 err = dcb_ieee_delapp(netdev, app_data);
1483 if (err)
1484 goto err;
1485 }
1486 }
1487
1488err:
7be99413 1489 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
5b7f7626 1490 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
f9ae7e4b
JF		 1491 return err;
1492}
1493
1494
6241b625 1495/* DCBX configuration */
7be99413
TG		 1496static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1497 u32 seq, struct nlattr **tb, struct sk_buff *skb)
6241b625 1498{
6241b625 1499 if (!netdev->dcbnl_ops->getdcbx)
7f891cf1 1500 return -EOPNOTSUPP;
6241b625 1501
7be99413
TG		 1502 return nla_put_u8(skb, DCB_ATTR_DCBX,
1503 netdev->dcbnl_ops->getdcbx(netdev));
6241b625
SR		 1504}
1505
7be99413
TG		 1506static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1507 u32 seq, struct nlattr **tb, struct sk_buff *skb)
6241b625 1508{
6241b625
SR		 1509 u8 value;
1510
7f891cf1
SR		 1511 if (!netdev->dcbnl_ops->setdcbx)
1512 return -EOPNOTSUPP;
1513
1514 if (!tb[DCB_ATTR_DCBX])
1515 return -EINVAL;
6241b625
SR		 1516
1517 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1518
7be99413
TG		 1519 return nla_put_u8(skb, DCB_ATTR_DCBX,
1520 netdev->dcbnl_ops->setdcbx(netdev, value));
6241b625
SR		 1521}
1522
7be99413
TG		 1523static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1524 u32 seq, struct nlattr **tb, struct sk_buff *skb)
ea45fe4e 1525{
ea45fe4e
SR		 1526 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1527 u8 value;
7f891cf1 1528 int ret, i;
ea45fe4e
SR		 1529 int getall = 0;
1530
7f891cf1
SR		 1531 if (!netdev->dcbnl_ops->getfeatcfg)
1532 return -EOPNOTSUPP;
1533
1534 if (!tb[DCB_ATTR_FEATCFG])
1535 return -EINVAL;
ea45fe4e
SR		 1536
1537 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1538 dcbnl_featcfg_nest);
7f891cf1 1539 if (ret)
7be99413 1540 return ret;
ea45fe4e 1541
7be99413
TG		 1542 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1543 if (!nest)
1544 return -EMSGSIZE;
ea45fe4e
SR		 1545
1546 if (data[DCB_FEATCFG_ATTR_ALL])
1547 getall = 1;
1548
1549 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1550 if (!getall && !data[i])
1551 continue;
1552
1553 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
7f891cf1 1554 if (!ret)
7be99413 1555 ret = nla_put_u8(skb, i, value);
ea45fe4e 1556
7f891cf1 1557 if (ret) {
7be99413 1558 nla_nest_cancel(skb, nest);
7f891cf1
SR		 1559 goto nla_put_failure;
1560 }
ea45fe4e 1561 }
7be99413 1562 nla_nest_end(skb, nest);
ea45fe4e 1563
7f891cf1 1564nla_put_failure:
ea45fe4e
SR		 1565 return ret;
1566}
1567
7be99413
TG		 1568static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1569 u32 seq, struct nlattr **tb, struct sk_buff *skb)
ea45fe4e
SR		 1570{
1571 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
7f891cf1 1572 int ret, i;
ea45fe4e 1573 u8 value;
ea45fe4e 1574
7f891cf1
SR		 1575 if (!netdev->dcbnl_ops->setfeatcfg)
1576 return -ENOTSUPP;
1577
1578 if (!tb[DCB_ATTR_FEATCFG])
1579 return -EINVAL;
ea45fe4e
SR		 1580
1581 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1582 dcbnl_featcfg_nest);
1583
7f891cf1 1584 if (ret)
ea45fe4e 1585 goto err;
ea45fe4e
SR		 1586
1587 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1588 if (data[i] == NULL)
1589 continue;
1590
1591 value = nla_get_u8(data[i]);
1592
1593 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1594
1595 if (ret)
7f891cf1 1596 goto err;
ea45fe4e 1597 }
ea45fe4e 1598err:
7be99413 1599 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
7f891cf1 1600
ea45fe4e
SR		 1601 return ret;
1602}
1603
dc6ed1df 1604/* Handle CEE DCBX GET commands. */
7be99413
TG		 1605static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1606 u32 seq, struct nlattr **tb, struct sk_buff *skb)
dc6ed1df 1607{
dc6ed1df 1608 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
dc6ed1df
SR		 1609
1610 if (!ops)
1611 return -EOPNOTSUPP;
1612
7be99413 1613 return dcbnl_cee_fill(skb, netdev);
dc6ed1df
SR		 1614}
1615
33a03aad
TG		 1616struct reply_func {
1617 /* reply netlink message type */
1618 int type;
1619
1620 /* function to fill message contents */
1621 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1622 struct nlattr **, struct sk_buff *);
1623};
1624
1625static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
7be99413
TG		 1626 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1627 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1628 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1629 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1630 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1631 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1632 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1633 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1634 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1635 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1636 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1637 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1638 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1639 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1640 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1641 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1642 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1643 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1644 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1645 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1646 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1647 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1648 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1649 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1650 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1651 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1652 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
33a03aad
TG		 1653};
1654
2f90b865
AD		 1655static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1656{
1657 struct net *net = sock_net(skb->sk);
1658 struct net_device *netdev;
7a282bc3 1659 struct dcbmsg *dcb = nlmsg_data(nlh);
2f90b865
AD		 1660 struct nlattr *tb[DCB_ATTR_MAX + 1];
1661 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1662 int ret = -EINVAL;
33a03aad 1663 struct sk_buff *reply_skb;
39912f9c 1664 struct nlmsghdr *reply_nlh = NULL;
33a03aad 1665 const struct reply_func *fn;
2f90b865 1666
09ad9bc7 1667 if (!net_eq(net, &init_net))
2f90b865
AD		 1668 return -EINVAL;
1669
1670 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1671 dcbnl_rtnl_policy);
1672 if (ret < 0)
1673 return ret;
1674
33a03aad
TG		 1675 if (dcb->cmd > DCB_CMD_MAX)
1676 return -EINVAL;
1677
1678 /* check if a reply function has been defined for the command */
1679 fn = &reply_funcs[dcb->cmd];
1680 if (!fn->cb)
1681 return -EOPNOTSUPP;
1682
2f90b865
AD		 1683 if (!tb[DCB_ATTR_IFNAME])
1684 return -EINVAL;
1685
1686 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1687 if (!netdev)
3d1f4869 1688 return -ENODEV;
2f90b865 1689
3d1f4869
TG		 1690 if (!netdev->dcbnl_ops) {
1691 ret = -EOPNOTSUPP;
1692 goto out;
1693 }
2f90b865 1694
33a03aad
TG		 1695 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, pid, nlh->nlmsg_seq,
1696 nlh->nlmsg_flags, &reply_nlh);
1697 if (!reply_skb) {
1698 ret = -ENOBUFS;
1699 goto out;
1700 }
1701
1702 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1703 if (ret < 0) {
1704 nlmsg_free(reply_skb);
1705 goto out;
1706 }
1707
1708 nlmsg_end(reply_skb, reply_nlh);
1709
1710 ret = rtnl_unicast(reply_skb, &init_net, pid);
2f90b865
AD		 1711out:
1712 dev_put(netdev);
1713 return ret;
1714}
1715
716b31ab
TG		 1716static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1717 int ifindex, int prio)
1718{
1719 struct dcb_app_type *itr;
1720
1721 list_for_each_entry(itr, &dcb_app_list, list) {
1722 if (itr->app.selector == app->selector &&
1723 itr->app.protocol == app->protocol &&
1724 itr->ifindex == ifindex &&
1725 (!prio || itr->app.priority == prio))
1726 return itr;
1727 }
1728
1729 return NULL;
1730}
1731
4e4f2f69
TG		 1732static int dcb_app_add(const struct dcb_app *app, int ifindex)
1733{
1734 struct dcb_app_type *entry;
1735
1736 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1737 if (!entry)
1738 return -ENOMEM;
1739
1740 memcpy(&entry->app, app, sizeof(*app));
1741 entry->ifindex = ifindex;
1742 list_add(&entry->list, &dcb_app_list);
1743
1744 return 0;
1745}
1746
9ab933ab
JF		 1747/**
1748 * dcb_getapp - retrieve the DCBX application user priority
1749 *
1750 * On success returns a non-zero 802.1p user priority bitmap
1751 * otherwise returns 0 as the invalid user priority bitmap to
1752 * indicate an error.
1753 */
1754u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1755{
1756 struct dcb_app_type *itr;
1757 u8 prio = 0;
1758
1759 spin_lock(&dcb_lock);
716b31ab
TG		 1760 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1761 prio = itr->app.priority;
9ab933ab
JF		 1762 spin_unlock(&dcb_lock);
1763
1764 return prio;
1765}
1766EXPORT_SYMBOL(dcb_getapp);
1767
1768/**
b6db2174 1769 * dcb_setapp - add CEE dcb application data to app list
9ab933ab 1770 *
b6db2174
JF		 1771 * Priority 0 is an invalid priority in CEE spec. This routine
1772 * removes applications from the app list if the priority is
1773 * set to zero.
9ab933ab 1774 */
ab6baf98 1775int dcb_setapp(struct net_device *dev, struct dcb_app *new)
9ab933ab
JF		 1776{
1777 struct dcb_app_type *itr;
7ec79270 1778 struct dcb_app_type event;
4e4f2f69 1779 int err = 0;
7ec79270 1780
e290ed81 1781 event.ifindex = dev->ifindex;
7ec79270 1782 memcpy(&event.app, new, sizeof(event.app));
6bd0e1cb
JF		 1783 if (dev->dcbnl_ops->getdcbx)
1784 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
9ab933ab
JF		 1785
1786 spin_lock(&dcb_lock);
1787 /* Search for existing match and replace */
716b31ab
TG		 1788 if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1789 if (new->priority)
1790 itr->app.priority = new->priority;
1791 else {
1792 list_del(&itr->list);
1793 kfree(itr);
9ab933ab 1794 }
716b31ab 1795 goto out;
9ab933ab
JF		 1796 }
1797 /* App type does not exist add new application type */
4e4f2f69
TG		 1798 if (new->priority)
1799 err = dcb_app_add(new, dev->ifindex);
9ab933ab
JF		 1800out:
1801 spin_unlock(&dcb_lock);
4e4f2f69
TG		 1802 if (!err)
1803 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1804 return err;
9ab933ab
JF		 1805}
1806EXPORT_SYMBOL(dcb_setapp);
1807
a364c8cf
JF		 1808/**
1809 * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1810 *
1811 * Helper routine which on success returns a non-zero 802.1Qaz user
1812 * priority bitmap otherwise returns 0 to indicate the dcb_app was
1813 * not found in APP list.
1814 */
1815u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1816{
1817 struct dcb_app_type *itr;
1818 u8 prio = 0;
1819
1820 spin_lock(&dcb_lock);
716b31ab
TG		 1821 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1822 prio |= 1 << itr->app.priority;
a364c8cf
JF		 1823 spin_unlock(&dcb_lock);
1824
1825 return prio;
1826}
1827EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1828
b6db2174
JF		 1829/**
1830 * dcb_ieee_setapp - add IEEE dcb application data to app list
1831 *
1832 * This adds Application data to the list. Multiple application
1833 * entries may exists for the same selector and protocol as long
1834 * as the priorities are different.
1835 */
1836int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1837{
b6db2174
JF		 1838 struct dcb_app_type event;
1839 int err = 0;
1840
e290ed81 1841 event.ifindex = dev->ifindex;
b6db2174 1842 memcpy(&event.app, new, sizeof(event.app));
6bd0e1cb
JF		 1843 if (dev->dcbnl_ops->getdcbx)
1844 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
b6db2174
JF		 1845
1846 spin_lock(&dcb_lock);
1847 /* Search for existing match and abort if found */
716b31ab
TG		 1848 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1849 err = -EEXIST;
1850 goto out;
b6db2174
JF		 1851 }
1852
4e4f2f69 1853 err = dcb_app_add(new, dev->ifindex);
b6db2174
JF		 1854out:
1855 spin_unlock(&dcb_lock);
1856 if (!err)
1857 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1858 return err;
1859}
1860EXPORT_SYMBOL(dcb_ieee_setapp);
1861
f9ae7e4b
JF		 1862/**
1863 * dcb_ieee_delapp - delete IEEE dcb application data from list
1864 *
1865 * This removes a matching APP data from the APP list
1866 */
1867int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1868{
1869 struct dcb_app_type *itr;
1870 struct dcb_app_type event;
1871 int err = -ENOENT;
1872
e290ed81 1873 event.ifindex = dev->ifindex;
f9ae7e4b 1874 memcpy(&event.app, del, sizeof(event.app));
6bd0e1cb
JF		 1875 if (dev->dcbnl_ops->getdcbx)
1876 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
f9ae7e4b
JF		 1877
1878 spin_lock(&dcb_lock);
1879 /* Search for existing match and remove it. */
716b31ab
TG		 1880 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1881 list_del(&itr->list);
1882 kfree(itr);
1883 err = 0;
f9ae7e4b
JF		 1884 }
1885
f9ae7e4b
JF		 1886 spin_unlock(&dcb_lock);
1887 if (!err)
1888 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1889 return err;
1890}
1891EXPORT_SYMBOL(dcb_ieee_delapp);
1892
7c14c3f1 1893static void dcb_flushapp(void)
9ab933ab
JF		 1894{
1895 struct dcb_app_type *app;
2a8fe003 1896 struct dcb_app_type *tmp;
9ab933ab
JF		 1897
1898 spin_lock(&dcb_lock);
2a8fe003 1899 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
9ab933ab
JF		 1900 list_del(&app->list);
1901 kfree(app);
1902 }
1903 spin_unlock(&dcb_lock);
1904}
1905
2f90b865
AD		 1906static int __init dcbnl_init(void)
1907{
9ab933ab
JF		 1908 INIT_LIST_HEAD(&dcb_app_list);
1909
c7ac8679
GR		 1910 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1911 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
2f90b865
AD		 1912
1913 return 0;
1914}
1915module_init(dcbnl_init);
1916
1917static void __exit dcbnl_exit(void)
1918{
1919 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1920 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
9ab933ab 1921 dcb_flushapp();
2f90b865
AD		 1922}
1923module_exit(dcbnl_exit);
Linux 6.x block layer and io_uring tree(s)