blob: 553644402670b3461bde7fb26705ddde8729be75 [file] [log] [blame]
Alexander Duyck2f90b862008-11-20 20:52:10 -08001/*
Mark Rustad698e1d22011-03-14 09:01:02 +00002 * Copyright (c) 2008-2011, Intel Corporation.
Alexander Duyck2f90b862008-11-20 20:52:10 -08003 *
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
Jeff Kirsherc057b192013-12-06 09:13:44 -080014 * this program; if not, see <http://www.gnu.org/licenses/>.
Alexander Duyck2f90b862008-11-20 20:52:10 -080015 *
16 * Author: Lucy Liu <lucy.liu@intel.com>
17 */
18
19#include <linux/netdevice.h>
20#include <linux/netlink.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Alexander Duyck2f90b862008-11-20 20:52:10 -080022#include <net/netlink.h>
23#include <net/rtnetlink.h>
24#include <linux/dcbnl.h>
John Fastabend96b99682010-12-30 09:26:37 +000025#include <net/dcbevent.h>
Alexander Duyck2f90b862008-11-20 20:52:10 -080026#include <linux/rtnetlink.h>
Paul Gortmaker3a9a2312011-05-27 09:12:25 -040027#include <linux/module.h>
Alexander Duyck2f90b862008-11-20 20:52:10 -080028#include <net/sock.h>
29
Ben Hutchingsae86b9e2012-07-10 10:55:35 +000030/* Data Center Bridging (DCB) is a collection of Ethernet enhancements
Alexander Duyck2f90b862008-11-20 20:52:10 -080031 * intended to allow network traffic with differing requirements
32 * (highly reliable, no drops vs. best effort vs. low latency) to operate
33 * and co-exist on Ethernet. Current DCB features are:
34 *
35 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
36 * framework for assigning bandwidth guarantees to traffic classes.
37 *
38 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
39 * can work independently for each 802.1p priority.
40 *
41 * Congestion Notification - provides a mechanism for end-to-end congestion
42 * control for protocols which do not have built-in congestion management.
43 *
44 * More information about the emerging standards for these Ethernet features
45 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
46 *
47 * This file implements an rtnetlink interface to allow configuration of DCB
48 * features for capable devices.
49 */
50
51MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
Jeff Kirsher7a6b6f52008-11-25 01:02:08 -080052MODULE_DESCRIPTION("Data Center Bridging netlink interface");
Alexander Duyck2f90b862008-11-20 20:52:10 -080053MODULE_LICENSE("GPL");
54
55/**************** DCB attribute policies *************************************/
56
57/* DCB netlink attributes policy */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +000058static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
Alexander Duyck859ee3c2008-11-20 21:10:23 -080059 [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
60 [DCB_ATTR_STATE] = {.type = NLA_U8},
61 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
62 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
63 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
Alexander Duyck2f90b862008-11-20 20:52:10 -080064 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
Alexander Duyck859ee3c2008-11-20 21:10:23 -080065 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
66 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
67 [DCB_ATTR_BCN] = {.type = NLA_NESTED},
Yi Zou6fa382a2009-08-31 12:33:20 +000068 [DCB_ATTR_APP] = {.type = NLA_NESTED},
John Fastabend3e290272010-12-30 09:25:46 +000069 [DCB_ATTR_IEEE] = {.type = NLA_NESTED},
Shmulik Ravid6241b622010-12-30 06:26:48 +000070 [DCB_ATTR_DCBX] = {.type = NLA_U8},
Shmulik Ravidea45fe42010-12-30 06:26:55 +000071 [DCB_ATTR_FEATCFG] = {.type = NLA_NESTED},
Alexander Duyck2f90b862008-11-20 20:52:10 -080072};
73
74/* DCB priority flow control to User Priority nested attributes */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +000075static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
Alexander Duyck2f90b862008-11-20 20:52:10 -080076 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
79 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
80 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
81 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
82 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
83 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
84 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
85};
86
87/* DCB priority grouping nested attributes */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +000088static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
Alexander Duyck2f90b862008-11-20 20:52:10 -080089 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
93 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
94 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
95 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
96 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
97 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
98 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
101 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
102 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
103 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
104 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
105 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
106 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
107};
108
109/* DCB traffic class nested attributes. */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +0000110static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
Alexander Duyck2f90b862008-11-20 20:52:10 -0800111 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
112 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
113 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
114 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
115 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
116};
117
Alexander Duyck46132182008-11-20 21:05:08 -0800118/* DCB capabilities nested attributes. */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +0000119static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
Alexander Duyck46132182008-11-20 21:05:08 -0800120 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
121 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
122 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
123 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
124 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
125 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
126 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
127 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
Shmulik Ravid6241b622010-12-30 06:26:48 +0000128 [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
Alexander Duyck46132182008-11-20 21:05:08 -0800129};
Alexander Duyck2f90b862008-11-20 20:52:10 -0800130
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800131/* DCB capabilities nested attributes. */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +0000132static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800133 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
134 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
135 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
136};
137
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800138/* DCB BCN nested attributes. */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +0000139static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800140 [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
141 [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
142 [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
143 [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
144 [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
145 [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
146 [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
147 [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
148 [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
Don Skidmoref4314e82008-12-21 20:10:29 -0800149 [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},
150 [DCB_BCN_ATTR_BCNA_1] = {.type = NLA_U32},
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800151 [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
152 [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
153 [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
154 [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
155 [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
156 [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
157 [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
158 [DCB_BCN_ATTR_W] = {.type = NLA_U32},
159 [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
160 [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
161 [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
162 [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
163 [DCB_BCN_ATTR_C] = {.type = NLA_U32},
164 [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
165};
166
Yi Zou6fa382a2009-08-31 12:33:20 +0000167/* DCB APP nested attributes. */
Alexey Dobriyanb54452b2010-02-18 08:14:31 +0000168static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
Yi Zou6fa382a2009-08-31 12:33:20 +0000169 [DCB_APP_ATTR_IDTYPE] = {.type = NLA_U8},
170 [DCB_APP_ATTR_ID] = {.type = NLA_U16},
171 [DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
172};
173
John Fastabend3e290272010-12-30 09:25:46 +0000174/* IEEE 802.1Qaz nested attributes. */
175static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
176 [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
177 [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
178 [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
Amir Vadai08f10af2012-04-04 21:33:30 +0000179 [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
John Fastabend3e290272010-12-30 09:25:46 +0000180};
181
182static 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
Shmulik Ravidea45fe42010-12-30 06:26:55 +0000186/* DCB number of traffic classes nested attributes. */
187static 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
John Fastabend9ab933a2010-12-30 09:26:31 +0000194static LIST_HEAD(dcb_app_list);
195static DEFINE_SPINLOCK(dcb_lock);
196
Thomas Graf33a03aa2012-06-13 02:54:54 +0000197static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
198 u32 flags, struct nlmsghdr **nlhp)
199{
200 struct sk_buff *skb;
201 struct dcbmsg *dcb;
202 struct nlmsghdr *nlh;
203
204 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
205 if (!skb)
206 return NULL;
207
208 nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
Thomas Grafb3908e22012-06-13 22:40:15 +0000209 BUG_ON(!nlh);
Thomas Graf33a03aa2012-06-13 02:54:54 +0000210
211 dcb = nlmsg_data(nlh);
212 dcb->dcb_family = AF_UNSPEC;
213 dcb->cmd = cmd;
214 dcb->dcb_pad = 0;
215
216 if (nlhp)
217 *nlhp = nlh;
218
219 return skb;
220}
221
Thomas Graf7be99412012-06-13 02:54:55 +0000222static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
223 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800224{
Alexander Duyck2f90b862008-11-20 20:52:10 -0800225 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
226 if (!netdev->dcbnl_ops->getstate)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000227 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800228
Thomas Graf7be99412012-06-13 02:54:55 +0000229 return nla_put_u8(skb, DCB_ATTR_STATE,
230 netdev->dcbnl_ops->getstate(netdev));
Alexander Duyck2f90b862008-11-20 20:52:10 -0800231}
232
Thomas Graf7be99412012-06-13 02:54:55 +0000233static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
234 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800235{
Alexander Duyck2f90b862008-11-20 20:52:10 -0800236 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
237 u8 value;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000238 int ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800239 int i;
240 int getall = 0;
241
Thomas Graf3d1f4862012-06-13 02:54:58 +0000242 if (!tb[DCB_ATTR_PFC_CFG])
243 return -EINVAL;
244
245 if (!netdev->dcbnl_ops->getpfccfg)
246 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800247
248 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
249 tb[DCB_ATTR_PFC_CFG],
250 dcbnl_pfc_up_nest);
251 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000252 return ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800253
Thomas Graf7be99412012-06-13 02:54:55 +0000254 nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800255 if (!nest)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000256 return -EMSGSIZE;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800257
258 if (data[DCB_PFC_UP_ATTR_ALL])
259 getall = 1;
260
261 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
262 if (!getall && !data[i])
263 continue;
264
265 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
266 &value);
Thomas Graf7be99412012-06-13 02:54:55 +0000267 ret = nla_put_u8(skb, i, value);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800268 if (ret) {
Thomas Graf7be99412012-06-13 02:54:55 +0000269 nla_nest_cancel(skb, nest);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000270 return ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800271 }
272 }
Thomas Graf7be99412012-06-13 02:54:55 +0000273 nla_nest_end(skb, nest);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800274
275 return 0;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800276}
277
Thomas Graf7be99412012-06-13 02:54:55 +0000278static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
279 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800280{
Alexander Duyck2f90b862008-11-20 20:52:10 -0800281 u8 perm_addr[MAX_ADDR_LEN];
Alexander Duyck2f90b862008-11-20 20:52:10 -0800282
283 if (!netdev->dcbnl_ops->getpermhwaddr)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000284 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800285
Mathias Krause29cd8ae2013-03-09 05:52:21 +0000286 memset(perm_addr, 0, sizeof(perm_addr));
Alexander Duyck2f90b862008-11-20 20:52:10 -0800287 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
288
Thomas Graf7be99412012-06-13 02:54:55 +0000289 return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800290}
291
Thomas Graf7be99412012-06-13 02:54:55 +0000292static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
293 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck46132182008-11-20 21:05:08 -0800294{
Alexander Duyck46132182008-11-20 21:05:08 -0800295 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
296 u8 value;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000297 int ret;
Alexander Duyck46132182008-11-20 21:05:08 -0800298 int i;
299 int getall = 0;
300
Thomas Graf3d1f4862012-06-13 02:54:58 +0000301 if (!tb[DCB_ATTR_CAP])
302 return -EINVAL;
303
304 if (!netdev->dcbnl_ops->getcap)
305 return -EOPNOTSUPP;
Alexander Duyck46132182008-11-20 21:05:08 -0800306
307 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
308 dcbnl_cap_nest);
309 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000310 return ret;
Alexander Duyck46132182008-11-20 21:05:08 -0800311
Thomas Graf7be99412012-06-13 02:54:55 +0000312 nest = nla_nest_start(skb, DCB_ATTR_CAP);
Alexander Duyck46132182008-11-20 21:05:08 -0800313 if (!nest)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000314 return -EMSGSIZE;
Alexander Duyck46132182008-11-20 21:05:08 -0800315
316 if (data[DCB_CAP_ATTR_ALL])
317 getall = 1;
318
319 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
320 if (!getall && !data[i])
321 continue;
322
323 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
Thomas Graf7be99412012-06-13 02:54:55 +0000324 ret = nla_put_u8(skb, i, value);
Alexander Duyck46132182008-11-20 21:05:08 -0800325 if (ret) {
Thomas Graf7be99412012-06-13 02:54:55 +0000326 nla_nest_cancel(skb, nest);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000327 return ret;
Alexander Duyck46132182008-11-20 21:05:08 -0800328 }
329 }
330 }
Thomas Graf7be99412012-06-13 02:54:55 +0000331 nla_nest_end(skb, nest);
Alexander Duyck46132182008-11-20 21:05:08 -0800332
333 return 0;
Alexander Duyck46132182008-11-20 21:05:08 -0800334}
335
Thomas Graf7be99412012-06-13 02:54:55 +0000336static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
337 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800338{
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800339 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
340 u8 value;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000341 int ret;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800342 int i;
343 int getall = 0;
344
Thomas Graf3d1f4862012-06-13 02:54:58 +0000345 if (!tb[DCB_ATTR_NUMTCS])
346 return -EINVAL;
347
348 if (!netdev->dcbnl_ops->getnumtcs)
349 return -EOPNOTSUPP;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800350
351 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
352 dcbnl_numtcs_nest);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000353 if (ret)
354 return ret;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800355
Thomas Graf7be99412012-06-13 02:54:55 +0000356 nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000357 if (!nest)
358 return -EMSGSIZE;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800359
360 if (data[DCB_NUMTCS_ATTR_ALL])
361 getall = 1;
362
363 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
364 if (!getall && !data[i])
365 continue;
366
367 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
368 if (!ret) {
Thomas Graf7be99412012-06-13 02:54:55 +0000369 ret = nla_put_u8(skb, i, value);
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800370 if (ret) {
Thomas Graf7be99412012-06-13 02:54:55 +0000371 nla_nest_cancel(skb, nest);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000372 return ret;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800373 }
Thomas Graf3d1f4862012-06-13 02:54:58 +0000374 } else
375 return -EINVAL;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800376 }
Thomas Graf7be99412012-06-13 02:54:55 +0000377 nla_nest_end(skb, nest);
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800378
379 return 0;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800380}
381
Thomas Graf7be99412012-06-13 02:54:55 +0000382static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
383 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800384{
385 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
Thomas Graf3d1f4862012-06-13 02:54:58 +0000386 int ret;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800387 u8 value;
388 int i;
389
Thomas Graf3d1f4862012-06-13 02:54:58 +0000390 if (!tb[DCB_ATTR_NUMTCS])
391 return -EINVAL;
392
393 if (!netdev->dcbnl_ops->setnumtcs)
394 return -EOPNOTSUPP;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800395
396 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
397 dcbnl_numtcs_nest);
Thomas Graf7be99412012-06-13 02:54:55 +0000398 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000399 return ret;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800400
401 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
402 if (data[i] == NULL)
403 continue;
404
405 value = nla_get_u8(data[i]);
406
407 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800408 if (ret)
Thomas Graf7be99412012-06-13 02:54:55 +0000409 break;
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800410 }
411
Thomas Graf7be99412012-06-13 02:54:55 +0000412 return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
Alexander Duyck33dbabc2008-11-20 21:08:19 -0800413}
414
Thomas Graf7be99412012-06-13 02:54:55 +0000415static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
416 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800417{
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800418 if (!netdev->dcbnl_ops->getpfcstate)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000419 return -EOPNOTSUPP;
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800420
Thomas Graf7be99412012-06-13 02:54:55 +0000421 return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
422 netdev->dcbnl_ops->getpfcstate(netdev));
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800423}
424
Thomas Graf7be99412012-06-13 02:54:55 +0000425static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
426 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800427{
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800428 u8 value;
429
Thomas Graf3d1f4862012-06-13 02:54:58 +0000430 if (!tb[DCB_ATTR_PFC_STATE])
Thomas Graf7be99412012-06-13 02:54:55 +0000431 return -EINVAL;
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800432
Thomas Graf3d1f4862012-06-13 02:54:58 +0000433 if (!netdev->dcbnl_ops->setpfcstate)
434 return -EOPNOTSUPP;
435
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800436 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
437
438 netdev->dcbnl_ops->setpfcstate(netdev, value);
439
Thomas Graf7be99412012-06-13 02:54:55 +0000440 return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
Alexander Duyck0eb3aa92008-11-20 21:09:23 -0800441}
442
Thomas Graf7be99412012-06-13 02:54:55 +0000443static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
444 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Yi Zou57949682009-08-31 12:33:40 +0000445{
Yi Zou57949682009-08-31 12:33:40 +0000446 struct nlattr *app_nest;
447 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
448 u16 id;
449 u8 up, idtype;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000450 int ret;
Yi Zou57949682009-08-31 12:33:40 +0000451
John Fastabend3dce38a2011-01-21 16:35:18 +0000452 if (!tb[DCB_ATTR_APP])
Thomas Graf3d1f4862012-06-13 02:54:58 +0000453 return -EINVAL;
Yi Zou57949682009-08-31 12:33:40 +0000454
455 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
456 dcbnl_app_nest);
457 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000458 return ret;
Yi Zou57949682009-08-31 12:33:40 +0000459
Yi Zou57949682009-08-31 12:33:40 +0000460 /* all must be non-null */
461 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
462 (!app_tb[DCB_APP_ATTR_ID]))
Thomas Graf3d1f4862012-06-13 02:54:58 +0000463 return -EINVAL;
Yi Zou57949682009-08-31 12:33:40 +0000464
465 /* either by eth type or by socket number */
466 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
467 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
468 (idtype != DCB_APP_IDTYPE_PORTNUM))
Thomas Graf3d1f4862012-06-13 02:54:58 +0000469 return -EINVAL;
Yi Zou57949682009-08-31 12:33:40 +0000470
471 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
John Fastabend3dce38a2011-01-21 16:35:18 +0000472
473 if (netdev->dcbnl_ops->getapp) {
474 up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
475 } else {
476 struct dcb_app app = {
477 .selector = idtype,
478 .protocol = id,
479 };
480 up = dcb_getapp(netdev, &app);
481 }
Yi Zou57949682009-08-31 12:33:40 +0000482
Thomas Graf7be99412012-06-13 02:54:55 +0000483 app_nest = nla_nest_start(skb, DCB_ATTR_APP);
484 if (!app_nest)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000485 return -EMSGSIZE;
Yi Zou57949682009-08-31 12:33:40 +0000486
Thomas Graf7be99412012-06-13 02:54:55 +0000487 ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
Yi Zou57949682009-08-31 12:33:40 +0000488 if (ret)
489 goto out_cancel;
490
Thomas Graf7be99412012-06-13 02:54:55 +0000491 ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
Yi Zou57949682009-08-31 12:33:40 +0000492 if (ret)
493 goto out_cancel;
494
Thomas Graf7be99412012-06-13 02:54:55 +0000495 ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
Yi Zou57949682009-08-31 12:33:40 +0000496 if (ret)
497 goto out_cancel;
498
Thomas Graf7be99412012-06-13 02:54:55 +0000499 nla_nest_end(skb, app_nest);
Yi Zou57949682009-08-31 12:33:40 +0000500
Thomas Graf3d1f4862012-06-13 02:54:58 +0000501 return 0;
Yi Zou57949682009-08-31 12:33:40 +0000502
503out_cancel:
Thomas Graf7be99412012-06-13 02:54:55 +0000504 nla_nest_cancel(skb, app_nest);
Yi Zou57949682009-08-31 12:33:40 +0000505 return ret;
506}
507
Thomas Graf7be99412012-06-13 02:54:55 +0000508static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
509 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Yi Zou57949682009-08-31 12:33:40 +0000510{
Thomas Graf3d1f4862012-06-13 02:54:58 +0000511 int ret;
Yi Zou57949682009-08-31 12:33:40 +0000512 u16 id;
513 u8 up, idtype;
514 struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
515
John Fastabend9ab933a2010-12-30 09:26:31 +0000516 if (!tb[DCB_ATTR_APP])
Thomas Graf3d1f4862012-06-13 02:54:58 +0000517 return -EINVAL;
Yi Zou57949682009-08-31 12:33:40 +0000518
519 ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
520 dcbnl_app_nest);
521 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000522 return ret;
Yi Zou57949682009-08-31 12:33:40 +0000523
Yi Zou57949682009-08-31 12:33:40 +0000524 /* all must be non-null */
525 if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
526 (!app_tb[DCB_APP_ATTR_ID]) ||
527 (!app_tb[DCB_APP_ATTR_PRIORITY]))
Thomas Graf3d1f4862012-06-13 02:54:58 +0000528 return -EINVAL;
Yi Zou57949682009-08-31 12:33:40 +0000529
530 /* either by eth type or by socket number */
531 idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
532 if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
533 (idtype != DCB_APP_IDTYPE_PORTNUM))
Thomas Graf3d1f4862012-06-13 02:54:58 +0000534 return -EINVAL;
Yi Zou57949682009-08-31 12:33:40 +0000535
536 id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
537 up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
538
John Fastabend9ab933a2010-12-30 09:26:31 +0000539 if (netdev->dcbnl_ops->setapp) {
Thomas Graf3d1f4862012-06-13 02:54:58 +0000540 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
John Fastabend9ab933a2010-12-30 09:26:31 +0000541 } else {
542 struct dcb_app app;
543 app.selector = idtype;
544 app.protocol = id;
545 app.priority = up;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000546 ret = dcb_setapp(netdev, &app);
John Fastabend9ab933a2010-12-30 09:26:31 +0000547 }
548
Thomas Graf7be99412012-06-13 02:54:55 +0000549 ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
John Fastabend08157982012-04-20 09:49:23 +0000550 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000551
Yi Zou57949682009-08-31 12:33:40 +0000552 return ret;
553}
554
Thomas Graf7be99412012-06-13 02:54:55 +0000555static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
556 struct nlattr **tb, struct sk_buff *skb, int dir)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800557{
Alexander Duyck2f90b862008-11-20 20:52:10 -0800558 struct nlattr *pg_nest, *param_nest, *data;
559 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
560 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
561 u8 prio, pgid, tc_pct, up_map;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000562 int ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800563 int getall = 0;
564 int i;
565
Thomas Graf3d1f4862012-06-13 02:54:58 +0000566 if (!tb[DCB_ATTR_PG_CFG])
567 return -EINVAL;
568
569 if (!netdev->dcbnl_ops->getpgtccfgtx ||
Alexander Duyck2f90b862008-11-20 20:52:10 -0800570 !netdev->dcbnl_ops->getpgtccfgrx ||
571 !netdev->dcbnl_ops->getpgbwgcfgtx ||
572 !netdev->dcbnl_ops->getpgbwgcfgrx)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000573 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800574
575 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
576 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800577 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000578 return ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800579
Thomas Graf7be99412012-06-13 02:54:55 +0000580 pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800581 if (!pg_nest)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000582 return -EMSGSIZE;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800583
584 if (pg_tb[DCB_PG_ATTR_TC_ALL])
585 getall = 1;
586
587 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
588 if (!getall && !pg_tb[i])
589 continue;
590
591 if (pg_tb[DCB_PG_ATTR_TC_ALL])
592 data = pg_tb[DCB_PG_ATTR_TC_ALL];
593 else
594 data = pg_tb[i];
595 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
596 data, dcbnl_tc_param_nest);
597 if (ret)
598 goto err_pg;
599
Thomas Graf7be99412012-06-13 02:54:55 +0000600 param_nest = nla_nest_start(skb, i);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800601 if (!param_nest)
602 goto err_pg;
603
604 pgid = DCB_ATTR_VALUE_UNDEFINED;
605 prio = DCB_ATTR_VALUE_UNDEFINED;
606 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
607 up_map = DCB_ATTR_VALUE_UNDEFINED;
608
609 if (dir) {
610 /* Rx */
611 netdev->dcbnl_ops->getpgtccfgrx(netdev,
612 i - DCB_PG_ATTR_TC_0, &prio,
613 &pgid, &tc_pct, &up_map);
614 } else {
615 /* Tx */
616 netdev->dcbnl_ops->getpgtccfgtx(netdev,
617 i - DCB_PG_ATTR_TC_0, &prio,
618 &pgid, &tc_pct, &up_map);
619 }
620
621 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
622 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
Thomas Graf7be99412012-06-13 02:54:55 +0000623 ret = nla_put_u8(skb,
Alexander Duyck2f90b862008-11-20 20:52:10 -0800624 DCB_TC_ATTR_PARAM_PGID, pgid);
625 if (ret)
626 goto err_param;
627 }
628 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
629 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
Thomas Graf7be99412012-06-13 02:54:55 +0000630 ret = nla_put_u8(skb,
Alexander Duyck2f90b862008-11-20 20:52:10 -0800631 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
632 if (ret)
633 goto err_param;
634 }
635 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
636 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
Thomas Graf7be99412012-06-13 02:54:55 +0000637 ret = nla_put_u8(skb,
Alexander Duyck2f90b862008-11-20 20:52:10 -0800638 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
639 if (ret)
640 goto err_param;
641 }
642 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
643 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
Thomas Graf7be99412012-06-13 02:54:55 +0000644 ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
Alexander Duyck2f90b862008-11-20 20:52:10 -0800645 tc_pct);
646 if (ret)
647 goto err_param;
648 }
Thomas Graf7be99412012-06-13 02:54:55 +0000649 nla_nest_end(skb, param_nest);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800650 }
651
652 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
653 getall = 1;
654 else
655 getall = 0;
656
657 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
658 if (!getall && !pg_tb[i])
659 continue;
660
661 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
662
663 if (dir) {
664 /* Rx */
665 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
666 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
667 } else {
668 /* Tx */
669 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
670 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
671 }
Thomas Graf7be99412012-06-13 02:54:55 +0000672 ret = nla_put_u8(skb, i, tc_pct);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800673 if (ret)
674 goto err_pg;
675 }
676
Thomas Graf7be99412012-06-13 02:54:55 +0000677 nla_nest_end(skb, pg_nest);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800678
679 return 0;
680
681err_param:
Thomas Graf7be99412012-06-13 02:54:55 +0000682 nla_nest_cancel(skb, param_nest);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800683err_pg:
Thomas Graf7be99412012-06-13 02:54:55 +0000684 nla_nest_cancel(skb, pg_nest);
Thomas Graf3d1f4862012-06-13 02:54:58 +0000685
686 return -EMSGSIZE;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800687}
688
Thomas Graf7be99412012-06-13 02:54:55 +0000689static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
690 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800691{
Thomas Graf7be99412012-06-13 02:54:55 +0000692 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800693}
694
Thomas Graf7be99412012-06-13 02:54:55 +0000695static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
696 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800697{
Thomas Graf7be99412012-06-13 02:54:55 +0000698 return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800699}
700
Thomas Graf7be99412012-06-13 02:54:55 +0000701static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
702 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800703{
Alexander Duyck2f90b862008-11-20 20:52:10 -0800704 u8 value;
705
Thomas Graf3d1f4862012-06-13 02:54:58 +0000706 if (!tb[DCB_ATTR_STATE])
Thomas Graf7be99412012-06-13 02:54:55 +0000707 return -EINVAL;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800708
Thomas Graf3d1f4862012-06-13 02:54:58 +0000709 if (!netdev->dcbnl_ops->setstate)
710 return -EOPNOTSUPP;
711
Alexander Duyck2f90b862008-11-20 20:52:10 -0800712 value = nla_get_u8(tb[DCB_ATTR_STATE]);
713
Thomas Graf7be99412012-06-13 02:54:55 +0000714 return nla_put_u8(skb, DCB_ATTR_STATE,
715 netdev->dcbnl_ops->setstate(netdev, value));
Alexander Duyck2f90b862008-11-20 20:52:10 -0800716}
717
Thomas Graf7be99412012-06-13 02:54:55 +0000718static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
719 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800720{
721 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
722 int i;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000723 int ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800724 u8 value;
725
Thomas Graf3d1f4862012-06-13 02:54:58 +0000726 if (!tb[DCB_ATTR_PFC_CFG])
727 return -EINVAL;
728
729 if (!netdev->dcbnl_ops->setpfccfg)
730 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800731
732 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
733 tb[DCB_ATTR_PFC_CFG],
734 dcbnl_pfc_up_nest);
735 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000736 return ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800737
738 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
739 if (data[i] == NULL)
740 continue;
741 value = nla_get_u8(data[i]);
742 netdev->dcbnl_ops->setpfccfg(netdev,
743 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
744 }
745
Thomas Graf7be99412012-06-13 02:54:55 +0000746 return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800747}
748
Thomas Graf7be99412012-06-13 02:54:55 +0000749static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
750 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800751{
Thomas Graf3d1f4862012-06-13 02:54:58 +0000752 int ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800753
Thomas Graf3d1f4862012-06-13 02:54:58 +0000754 if (!tb[DCB_ATTR_SET_ALL])
755 return -EINVAL;
756
757 if (!netdev->dcbnl_ops->setall)
758 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800759
Thomas Graf7be99412012-06-13 02:54:55 +0000760 ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
761 netdev->dcbnl_ops->setall(netdev));
John Fastabend08157982012-04-20 09:49:23 +0000762 dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800763
764 return ret;
765}
766
Thomas Graf7be99412012-06-13 02:54:55 +0000767static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
768 u32 seq, struct nlattr **tb, struct sk_buff *skb,
769 int dir)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800770{
771 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
772 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
Thomas Graf3d1f4862012-06-13 02:54:58 +0000773 int ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800774 int i;
775 u8 pgid;
776 u8 up_map;
777 u8 prio;
778 u8 tc_pct;
779
Thomas Graf3d1f4862012-06-13 02:54:58 +0000780 if (!tb[DCB_ATTR_PG_CFG])
781 return -EINVAL;
782
783 if (!netdev->dcbnl_ops->setpgtccfgtx ||
Alexander Duyck2f90b862008-11-20 20:52:10 -0800784 !netdev->dcbnl_ops->setpgtccfgrx ||
785 !netdev->dcbnl_ops->setpgbwgcfgtx ||
786 !netdev->dcbnl_ops->setpgbwgcfgrx)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000787 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800788
789 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
790 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
791 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000792 return ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800793
794 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
795 if (!pg_tb[i])
796 continue;
797
798 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
799 pg_tb[i], dcbnl_tc_param_nest);
800 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000801 return ret;
Alexander Duyck2f90b862008-11-20 20:52:10 -0800802
803 pgid = DCB_ATTR_VALUE_UNDEFINED;
804 prio = DCB_ATTR_VALUE_UNDEFINED;
805 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
806 up_map = DCB_ATTR_VALUE_UNDEFINED;
807
808 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
809 prio =
810 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
811
812 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
813 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
814
815 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
816 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
817
818 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
819 up_map =
820 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
821
822 /* dir: Tx = 0, Rx = 1 */
823 if (dir) {
824 /* Rx */
825 netdev->dcbnl_ops->setpgtccfgrx(netdev,
826 i - DCB_PG_ATTR_TC_0,
827 prio, pgid, tc_pct, up_map);
828 } else {
829 /* Tx */
830 netdev->dcbnl_ops->setpgtccfgtx(netdev,
831 i - DCB_PG_ATTR_TC_0,
832 prio, pgid, tc_pct, up_map);
833 }
834 }
835
836 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
837 if (!pg_tb[i])
838 continue;
839
840 tc_pct = nla_get_u8(pg_tb[i]);
841
842 /* dir: Tx = 0, Rx = 1 */
843 if (dir) {
844 /* Rx */
845 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
846 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
847 } else {
848 /* Tx */
849 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
850 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
851 }
852 }
853
John Fastabendbb1dfef2012-06-20 19:56:21 +0000854 return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800855}
856
Thomas Graf7be99412012-06-13 02:54:55 +0000857static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
858 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800859{
Thomas Graf7be99412012-06-13 02:54:55 +0000860 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800861}
862
Thomas Graf7be99412012-06-13 02:54:55 +0000863static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
864 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck2f90b862008-11-20 20:52:10 -0800865{
Thomas Graf7be99412012-06-13 02:54:55 +0000866 return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
Alexander Duyck2f90b862008-11-20 20:52:10 -0800867}
868
Thomas Graf7be99412012-06-13 02:54:55 +0000869static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
870 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800871{
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800872 struct nlattr *bcn_nest;
873 struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
874 u8 value_byte;
875 u32 value_integer;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000876 int ret;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800877 bool getall = false;
878 int i;
879
Thomas Graf3d1f4862012-06-13 02:54:58 +0000880 if (!tb[DCB_ATTR_BCN])
881 return -EINVAL;
882
883 if (!netdev->dcbnl_ops->getbcnrp ||
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800884 !netdev->dcbnl_ops->getbcncfg)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000885 return -EOPNOTSUPP;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800886
887 ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
888 tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800889 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000890 return ret;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800891
Thomas Graf7be99412012-06-13 02:54:55 +0000892 bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800893 if (!bcn_nest)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000894 return -EMSGSIZE;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800895
896 if (bcn_tb[DCB_BCN_ATTR_ALL])
897 getall = true;
898
899 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
900 if (!getall && !bcn_tb[i])
901 continue;
902
903 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
904 &value_byte);
Thomas Graf7be99412012-06-13 02:54:55 +0000905 ret = nla_put_u8(skb, i, value_byte);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800906 if (ret)
907 goto err_bcn;
908 }
909
Don Skidmoref4314e82008-12-21 20:10:29 -0800910 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800911 if (!getall && !bcn_tb[i])
912 continue;
913
914 netdev->dcbnl_ops->getbcncfg(netdev, i,
915 &value_integer);
Thomas Graf7be99412012-06-13 02:54:55 +0000916 ret = nla_put_u32(skb, i, value_integer);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800917 if (ret)
918 goto err_bcn;
919 }
920
Thomas Graf7be99412012-06-13 02:54:55 +0000921 nla_nest_end(skb, bcn_nest);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800922
923 return 0;
924
925err_bcn:
Thomas Graf7be99412012-06-13 02:54:55 +0000926 nla_nest_cancel(skb, bcn_nest);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800927 return ret;
928}
929
Thomas Graf7be99412012-06-13 02:54:55 +0000930static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
931 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800932{
933 struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
934 int i;
Thomas Graf3d1f4862012-06-13 02:54:58 +0000935 int ret;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800936 u8 value_byte;
937 u32 value_int;
938
Thomas Graf3d1f4862012-06-13 02:54:58 +0000939 if (!tb[DCB_ATTR_BCN])
940 return -EINVAL;
941
942 if (!netdev->dcbnl_ops->setbcncfg ||
Joe Perchesf64f9e72009-11-29 16:55:45 -0800943 !netdev->dcbnl_ops->setbcnrp)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000944 return -EOPNOTSUPP;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800945
946 ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
947 tb[DCB_ATTR_BCN],
948 dcbnl_pfc_up_nest);
949 if (ret)
Thomas Graf3d1f4862012-06-13 02:54:58 +0000950 return ret;
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800951
952 for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
953 if (data[i] == NULL)
954 continue;
955 value_byte = nla_get_u8(data[i]);
956 netdev->dcbnl_ops->setbcnrp(netdev,
957 data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
958 }
959
Don Skidmoref4314e82008-12-21 20:10:29 -0800960 for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800961 if (data[i] == NULL)
962 continue;
963 value_int = nla_get_u32(data[i]);
964 netdev->dcbnl_ops->setbcncfg(netdev,
965 i, value_int);
966 }
967
Thomas Graf3d1f4862012-06-13 02:54:58 +0000968 return nla_put_u8(skb, DCB_ATTR_BCN, 0);
Alexander Duyck859ee3c2008-11-20 21:10:23 -0800969}
970
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +0000971static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
972 int app_nested_type, int app_info_type,
973 int app_entry_type)
Shmulik Ravideed84712011-02-27 05:04:31 +0000974{
975 struct dcb_peer_app_info info;
976 struct dcb_app *table = NULL;
977 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
978 u16 app_count;
979 int err;
980
981
982 /**
983 * retrieve the peer app configuration form the driver. If the driver
984 * handlers fail exit without doing anything
985 */
986 err = ops->peer_getappinfo(netdev, &info, &app_count);
987 if (!err && app_count) {
988 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
989 if (!table)
990 return -ENOMEM;
991
992 err = ops->peer_getapptable(netdev, table);
993 }
994
995 if (!err) {
996 u16 i;
997 struct nlattr *app;
998
999 /**
1000 * build the message, from here on the only possible failure
1001 * is due to the skb size
1002 */
1003 err = -EMSGSIZE;
1004
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001005 app = nla_nest_start(skb, app_nested_type);
Shmulik Ravideed84712011-02-27 05:04:31 +00001006 if (!app)
1007 goto nla_put_failure;
1008
David S. Miller1eb4c972012-04-01 20:03:01 -04001009 if (app_info_type &&
1010 nla_put(skb, app_info_type, sizeof(info), &info))
1011 goto nla_put_failure;
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001012
David S. Miller1eb4c972012-04-01 20:03:01 -04001013 for (i = 0; i < app_count; i++) {
1014 if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1015 &table[i]))
1016 goto nla_put_failure;
1017 }
Shmulik Ravideed84712011-02-27 05:04:31 +00001018 nla_nest_end(skb, app);
1019 }
1020 err = 0;
1021
1022nla_put_failure:
1023 kfree(table);
1024 return err;
1025}
John Fastabend3e290272010-12-30 09:25:46 +00001026
1027/* Handle IEEE 802.1Qaz GET commands. */
John Fastabend314b4772011-06-21 07:34:37 +00001028static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
John Fastabend3e290272010-12-30 09:25:46 +00001029{
John Fastabend9ab933a2010-12-30 09:26:31 +00001030 struct nlattr *ieee, *app;
1031 struct dcb_app_type *itr;
John Fastabend3e290272010-12-30 09:25:46 +00001032 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
John Fastabendc7797ba2011-06-21 07:34:31 +00001033 int dcbx;
Thomas Graf3d1f4862012-06-13 02:54:58 +00001034 int err;
John Fastabend3e290272010-12-30 09:25:46 +00001035
David S. Miller1eb4c972012-04-01 20:03:01 -04001036 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001037 return -EMSGSIZE;
1038
John Fastabend3e290272010-12-30 09:25:46 +00001039 ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1040 if (!ieee)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001041 return -EMSGSIZE;
John Fastabend3e290272010-12-30 09:25:46 +00001042
1043 if (ops->ieee_getets) {
1044 struct ieee_ets ets;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001045 memset(&ets, 0, sizeof(ets));
John Fastabend3e290272010-12-30 09:25:46 +00001046 err = ops->ieee_getets(netdev, &ets);
David S. Miller1eb4c972012-04-01 20:03:01 -04001047 if (!err &&
1048 nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001049 return -EMSGSIZE;
John Fastabend3e290272010-12-30 09:25:46 +00001050 }
1051
Amir Vadai08f10af2012-04-04 21:33:30 +00001052 if (ops->ieee_getmaxrate) {
1053 struct ieee_maxrate maxrate;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001054 memset(&maxrate, 0, sizeof(maxrate));
Amir Vadai08f10af2012-04-04 21:33:30 +00001055 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)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001060 return -EMSGSIZE;
Amir Vadai08f10af2012-04-04 21:33:30 +00001061 }
1062 }
1063
John Fastabend3e290272010-12-30 09:25:46 +00001064 if (ops->ieee_getpfc) {
1065 struct ieee_pfc pfc;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001066 memset(&pfc, 0, sizeof(pfc));
John Fastabend3e290272010-12-30 09:25:46 +00001067 err = ops->ieee_getpfc(netdev, &pfc);
David S. Miller1eb4c972012-04-01 20:03:01 -04001068 if (!err &&
1069 nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001070 return -EMSGSIZE;
John Fastabend3e290272010-12-30 09:25:46 +00001071 }
1072
John Fastabend9ab933a2010-12-30 09:26:31 +00001073 app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1074 if (!app)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001075 return -EMSGSIZE;
John Fastabend9ab933a2010-12-30 09:26:31 +00001076
1077 spin_lock(&dcb_lock);
1078 list_for_each_entry(itr, &dcb_app_list, list) {
Mark Rustade290ed82011-10-06 08:52:33 +00001079 if (itr->ifindex == netdev->ifindex) {
Dan Carpenter70bfa2d2011-01-04 21:03:12 +00001080 err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1081 &itr->app);
1082 if (err) {
1083 spin_unlock(&dcb_lock);
Thomas Graf3d1f4862012-06-13 02:54:58 +00001084 return -EMSGSIZE;
Dan Carpenter70bfa2d2011-01-04 21:03:12 +00001085 }
1086 }
John Fastabend9ab933a2010-12-30 09:26:31 +00001087 }
John Fastabendc7797ba2011-06-21 07:34:31 +00001088
1089 if (netdev->dcbnl_ops->getdcbx)
1090 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1091 else
1092 dcbx = -EOPNOTSUPP;
1093
John Fastabend9ab933a2010-12-30 09:26:31 +00001094 spin_unlock(&dcb_lock);
1095 nla_nest_end(skb, app);
1096
Shmulik Ravideed84712011-02-27 05:04:31 +00001097 /* get peer info if available */
1098 if (ops->ieee_peer_getets) {
1099 struct ieee_ets ets;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001100 memset(&ets, 0, sizeof(ets));
Shmulik Ravideed84712011-02-27 05:04:31 +00001101 err = ops->ieee_peer_getets(netdev, &ets);
David S. Miller1eb4c972012-04-01 20:03:01 -04001102 if (!err &&
1103 nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001104 return -EMSGSIZE;
Shmulik Ravideed84712011-02-27 05:04:31 +00001105 }
1106
1107 if (ops->ieee_peer_getpfc) {
1108 struct ieee_pfc pfc;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001109 memset(&pfc, 0, sizeof(pfc));
Shmulik Ravideed84712011-02-27 05:04:31 +00001110 err = ops->ieee_peer_getpfc(netdev, &pfc);
David S. Miller1eb4c972012-04-01 20:03:01 -04001111 if (!err &&
1112 nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001113 return -EMSGSIZE;
Shmulik Ravideed84712011-02-27 05:04:31 +00001114 }
1115
1116 if (ops->peer_getappinfo && ops->peer_getapptable) {
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001117 err = dcbnl_build_peer_app(netdev, skb,
1118 DCB_ATTR_IEEE_PEER_APP,
1119 DCB_ATTR_IEEE_APP_UNSPEC,
1120 DCB_ATTR_IEEE_APP);
Shmulik Ravideed84712011-02-27 05:04:31 +00001121 if (err)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001122 return -EMSGSIZE;
Shmulik Ravideed84712011-02-27 05:04:31 +00001123 }
1124
John Fastabend3e290272010-12-30 09:25:46 +00001125 nla_nest_end(skb, ieee);
John Fastabendc7797ba2011-06-21 07:34:31 +00001126 if (dcbx >= 0) {
1127 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1128 if (err)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001129 return -EMSGSIZE;
John Fastabendc7797ba2011-06-21 07:34:31 +00001130 }
John Fastabend3e290272010-12-30 09:25:46 +00001131
John Fastabend314b4772011-06-21 07:34:37 +00001132 return 0;
John Fastabend3e290272010-12-30 09:25:46 +00001133}
1134
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001135static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1136 int dir)
1137{
1138 u8 pgid, up_map, prio, tc_pct;
1139 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1140 int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1141 struct nlattr *pg = nla_nest_start(skb, i);
1142
1143 if (!pg)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001144 return -EMSGSIZE;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001145
1146 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1147 struct nlattr *tc_nest = nla_nest_start(skb, i);
1148
1149 if (!tc_nest)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001150 return -EMSGSIZE;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001151
1152 pgid = DCB_ATTR_VALUE_UNDEFINED;
1153 prio = DCB_ATTR_VALUE_UNDEFINED;
1154 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1155 up_map = DCB_ATTR_VALUE_UNDEFINED;
1156
1157 if (!dir)
1158 ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1159 &prio, &pgid, &tc_pct, &up_map);
1160 else
1161 ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1162 &prio, &pgid, &tc_pct, &up_map);
1163
David S. Miller1eb4c972012-04-01 20:03:01 -04001164 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1165 nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1166 nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1167 nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001168 return -EMSGSIZE;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001169 nla_nest_end(skb, tc_nest);
1170 }
1171
1172 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1173 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1174
1175 if (!dir)
1176 ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1177 &tc_pct);
1178 else
1179 ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1180 &tc_pct);
David S. Miller1eb4c972012-04-01 20:03:01 -04001181 if (nla_put_u8(skb, i, tc_pct))
Thomas Graf3d1f4862012-06-13 02:54:58 +00001182 return -EMSGSIZE;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001183 }
1184 nla_nest_end(skb, pg);
1185 return 0;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001186}
1187
1188static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1189{
1190 struct nlattr *cee, *app;
1191 struct dcb_app_type *itr;
1192 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1193 int dcbx, i, err = -EMSGSIZE;
1194 u8 value;
1195
David S. Miller1eb4c972012-04-01 20:03:01 -04001196 if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1197 goto nla_put_failure;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001198 cee = nla_nest_start(skb, DCB_ATTR_CEE);
1199 if (!cee)
1200 goto nla_put_failure;
1201
1202 /* local pg */
1203 if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1204 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1205 if (err)
1206 goto nla_put_failure;
1207 }
1208
1209 if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1210 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1211 if (err)
1212 goto nla_put_failure;
1213 }
1214
1215 /* local pfc */
1216 if (ops->getpfccfg) {
1217 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1218
1219 if (!pfc_nest)
1220 goto nla_put_failure;
1221
1222 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1223 ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
David S. Miller1eb4c972012-04-01 20:03:01 -04001224 if (nla_put_u8(skb, i, value))
1225 goto nla_put_failure;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001226 }
1227 nla_nest_end(skb, pfc_nest);
1228 }
1229
1230 /* local app */
1231 spin_lock(&dcb_lock);
1232 app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1233 if (!app)
Dan Carpenter40f5d722011-07-07 21:27:24 +00001234 goto dcb_unlock;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001235
1236 list_for_each_entry(itr, &dcb_app_list, list) {
Mark Rustade290ed82011-10-06 08:52:33 +00001237 if (itr->ifindex == netdev->ifindex) {
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001238 struct nlattr *app_nest = nla_nest_start(skb,
1239 DCB_ATTR_APP);
1240 if (!app_nest)
1241 goto dcb_unlock;
1242
1243 err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1244 itr->app.selector);
1245 if (err)
1246 goto dcb_unlock;
1247
1248 err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1249 itr->app.protocol);
1250 if (err)
1251 goto dcb_unlock;
1252
1253 err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1254 itr->app.priority);
1255 if (err)
1256 goto dcb_unlock;
1257
1258 nla_nest_end(skb, app_nest);
1259 }
1260 }
1261 nla_nest_end(skb, app);
1262
1263 if (netdev->dcbnl_ops->getdcbx)
1264 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1265 else
1266 dcbx = -EOPNOTSUPP;
1267
1268 spin_unlock(&dcb_lock);
1269
1270 /* features flags */
1271 if (ops->getfeatcfg) {
1272 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1273 if (!feat)
1274 goto nla_put_failure;
1275
1276 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1277 i++)
David S. Miller1eb4c972012-04-01 20:03:01 -04001278 if (!ops->getfeatcfg(netdev, i, &value) &&
1279 nla_put_u8(skb, i, value))
1280 goto nla_put_failure;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001281
1282 nla_nest_end(skb, feat);
1283 }
1284
1285 /* peer info if available */
1286 if (ops->cee_peer_getpg) {
1287 struct cee_pg pg;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001288 memset(&pg, 0, sizeof(pg));
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001289 err = ops->cee_peer_getpg(netdev, &pg);
David S. Miller1eb4c972012-04-01 20:03:01 -04001290 if (!err &&
1291 nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1292 goto nla_put_failure;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001293 }
1294
1295 if (ops->cee_peer_getpfc) {
1296 struct cee_pfc pfc;
Mathias Krause29cd8ae2013-03-09 05:52:21 +00001297 memset(&pfc, 0, sizeof(pfc));
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001298 err = ops->cee_peer_getpfc(netdev, &pfc);
David S. Miller1eb4c972012-04-01 20:03:01 -04001299 if (!err &&
1300 nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1301 goto nla_put_failure;
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001302 }
1303
1304 if (ops->peer_getappinfo && ops->peer_getapptable) {
1305 err = dcbnl_build_peer_app(netdev, skb,
1306 DCB_ATTR_CEE_PEER_APP_TABLE,
1307 DCB_ATTR_CEE_PEER_APP_INFO,
1308 DCB_ATTR_CEE_PEER_APP);
1309 if (err)
1310 goto nla_put_failure;
1311 }
1312 nla_nest_end(skb, cee);
1313
1314 /* DCBX state */
1315 if (dcbx >= 0) {
1316 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1317 if (err)
1318 goto nla_put_failure;
1319 }
1320 return 0;
1321
1322dcb_unlock:
1323 spin_unlock(&dcb_lock);
1324nla_put_failure:
1325 return err;
1326}
1327
1328static int dcbnl_notify(struct net_device *dev, int event, int cmd,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001329 u32 seq, u32 portid, int dcbx_ver)
John Fastabend314b4772011-06-21 07:34:37 +00001330{
1331 struct net *net = dev_net(dev);
1332 struct sk_buff *skb;
1333 struct nlmsghdr *nlh;
John Fastabend314b4772011-06-21 07:34:37 +00001334 const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1335 int err;
1336
1337 if (!ops)
1338 return -EOPNOTSUPP;
1339
Eric W. Biederman15e47302012-09-07 20:12:54 +00001340 skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
John Fastabend314b4772011-06-21 07:34:37 +00001341 if (!skb)
1342 return -ENOBUFS;
1343
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001344 if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1345 err = dcbnl_ieee_fill(skb, dev);
1346 else
1347 err = dcbnl_cee_fill(skb, dev);
1348
John Fastabend314b4772011-06-21 07:34:37 +00001349 if (err < 0) {
1350 /* Report error to broadcast listeners */
Thomas Grafab6d4702012-06-13 02:54:57 +00001351 nlmsg_free(skb);
John Fastabend314b4772011-06-21 07:34:37 +00001352 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1353 } else {
1354 /* End nlmsg and notify broadcast listeners */
1355 nlmsg_end(skb, nlh);
1356 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1357 }
1358
1359 return err;
1360}
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001361
1362int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001363 u32 seq, u32 portid)
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001364{
Eric W. Biederman15e47302012-09-07 20:12:54 +00001365 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001366}
1367EXPORT_SYMBOL(dcbnl_ieee_notify);
1368
1369int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001370 u32 seq, u32 portid)
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001371{
Eric W. Biederman15e47302012-09-07 20:12:54 +00001372 return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001373}
1374EXPORT_SYMBOL(dcbnl_cee_notify);
John Fastabend314b4772011-06-21 07:34:37 +00001375
1376/* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1377 * be completed the entire msg is aborted and error value is returned.
1378 * No attempt is made to reconcile the case where only part of the
1379 * cmd can be completed.
1380 */
Thomas Graf7be99412012-06-13 02:54:55 +00001381static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1382 u32 seq, struct nlattr **tb, struct sk_buff *skb)
John Fastabend314b4772011-06-21 07:34:37 +00001383{
1384 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1385 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
Thomas Graf3d1f4862012-06-13 02:54:58 +00001386 int err;
John Fastabend314b4772011-06-21 07:34:37 +00001387
1388 if (!ops)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001389 return -EOPNOTSUPP;
John Fastabend314b4772011-06-21 07:34:37 +00001390
John Fastabend4003b652011-06-21 07:35:04 +00001391 if (!tb[DCB_ATTR_IEEE])
1392 return -EINVAL;
1393
John Fastabend314b4772011-06-21 07:34:37 +00001394 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1395 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1396 if (err)
1397 return err;
1398
1399 if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1400 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1401 err = ops->ieee_setets(netdev, ets);
1402 if (err)
1403 goto err;
1404 }
1405
Amir Vadai08f10af2012-04-04 21:33:30 +00001406 if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1407 struct ieee_maxrate *maxrate =
1408 nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1409 err = ops->ieee_setmaxrate(netdev, maxrate);
1410 if (err)
1411 goto err;
1412 }
1413
John Fastabend314b4772011-06-21 07:34:37 +00001414 if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1415 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1416 err = ops->ieee_setpfc(netdev, pfc);
1417 if (err)
1418 goto err;
1419 }
1420
1421 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1422 struct nlattr *attr;
1423 int rem;
1424
1425 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1426 struct dcb_app *app_data;
1427 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1428 continue;
1429 app_data = nla_data(attr);
1430 if (ops->ieee_setapp)
1431 err = ops->ieee_setapp(netdev, app_data);
1432 else
John Fastabendb6db2172011-06-21 07:34:42 +00001433 err = dcb_ieee_setapp(netdev, app_data);
John Fastabend314b4772011-06-21 07:34:37 +00001434 if (err)
1435 goto err;
1436 }
1437 }
1438
1439err:
Thomas Graf7be99412012-06-13 02:54:55 +00001440 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001441 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
John Fastabend314b4772011-06-21 07:34:37 +00001442 return err;
1443}
1444
Thomas Graf7be99412012-06-13 02:54:55 +00001445static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1446 u32 seq, struct nlattr **tb, struct sk_buff *skb)
John Fastabend314b4772011-06-21 07:34:37 +00001447{
John Fastabend314b4772011-06-21 07:34:37 +00001448 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
John Fastabend314b4772011-06-21 07:34:37 +00001449
1450 if (!ops)
1451 return -EOPNOTSUPP;
1452
Thomas Graf7be99412012-06-13 02:54:55 +00001453 return dcbnl_ieee_fill(skb, netdev);
John Fastabend314b4772011-06-21 07:34:37 +00001454}
John Fastabendf9ae7e42011-06-21 07:34:48 +00001455
Thomas Graf7be99412012-06-13 02:54:55 +00001456static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1457 u32 seq, struct nlattr **tb, struct sk_buff *skb)
John Fastabendf9ae7e42011-06-21 07:34:48 +00001458{
1459 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1460 struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
Thomas Graf3d1f4862012-06-13 02:54:58 +00001461 int err;
John Fastabendf9ae7e42011-06-21 07:34:48 +00001462
1463 if (!ops)
1464 return -EOPNOTSUPP;
1465
1466 if (!tb[DCB_ATTR_IEEE])
1467 return -EINVAL;
1468
1469 err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1470 tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1471 if (err)
1472 return err;
1473
1474 if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1475 struct nlattr *attr;
1476 int rem;
1477
1478 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1479 struct dcb_app *app_data;
1480
1481 if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1482 continue;
1483 app_data = nla_data(attr);
1484 if (ops->ieee_delapp)
1485 err = ops->ieee_delapp(netdev, app_data);
1486 else
1487 err = dcb_ieee_delapp(netdev, app_data);
1488 if (err)
1489 goto err;
1490 }
1491 }
1492
1493err:
Thomas Graf7be99412012-06-13 02:54:55 +00001494 err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
Shmulik Ravid5b7f7622011-07-05 06:16:25 +00001495 dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
John Fastabendf9ae7e42011-06-21 07:34:48 +00001496 return err;
1497}
1498
1499
Shmulik Ravid6241b622010-12-30 06:26:48 +00001500/* DCBX configuration */
Thomas Graf7be99412012-06-13 02:54:55 +00001501static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1502 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Shmulik Ravid6241b622010-12-30 06:26:48 +00001503{
Shmulik Ravid6241b622010-12-30 06:26:48 +00001504 if (!netdev->dcbnl_ops->getdcbx)
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001505 return -EOPNOTSUPP;
Shmulik Ravid6241b622010-12-30 06:26:48 +00001506
Thomas Graf7be99412012-06-13 02:54:55 +00001507 return nla_put_u8(skb, DCB_ATTR_DCBX,
1508 netdev->dcbnl_ops->getdcbx(netdev));
Shmulik Ravid6241b622010-12-30 06:26:48 +00001509}
1510
Thomas Graf7be99412012-06-13 02:54:55 +00001511static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1512 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Shmulik Ravid6241b622010-12-30 06:26:48 +00001513{
Shmulik Ravid6241b622010-12-30 06:26:48 +00001514 u8 value;
1515
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001516 if (!netdev->dcbnl_ops->setdcbx)
1517 return -EOPNOTSUPP;
1518
1519 if (!tb[DCB_ATTR_DCBX])
1520 return -EINVAL;
Shmulik Ravid6241b622010-12-30 06:26:48 +00001521
1522 value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1523
Thomas Graf7be99412012-06-13 02:54:55 +00001524 return nla_put_u8(skb, DCB_ATTR_DCBX,
1525 netdev->dcbnl_ops->setdcbx(netdev, value));
Shmulik Ravid6241b622010-12-30 06:26:48 +00001526}
1527
Thomas Graf7be99412012-06-13 02:54:55 +00001528static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1529 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001530{
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001531 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1532 u8 value;
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001533 int ret, i;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001534 int getall = 0;
1535
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001536 if (!netdev->dcbnl_ops->getfeatcfg)
1537 return -EOPNOTSUPP;
1538
1539 if (!tb[DCB_ATTR_FEATCFG])
1540 return -EINVAL;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001541
1542 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1543 dcbnl_featcfg_nest);
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001544 if (ret)
Thomas Graf7be99412012-06-13 02:54:55 +00001545 return ret;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001546
Thomas Graf7be99412012-06-13 02:54:55 +00001547 nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1548 if (!nest)
1549 return -EMSGSIZE;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001550
1551 if (data[DCB_FEATCFG_ATTR_ALL])
1552 getall = 1;
1553
1554 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1555 if (!getall && !data[i])
1556 continue;
1557
1558 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001559 if (!ret)
Thomas Graf7be99412012-06-13 02:54:55 +00001560 ret = nla_put_u8(skb, i, value);
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001561
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001562 if (ret) {
Thomas Graf7be99412012-06-13 02:54:55 +00001563 nla_nest_cancel(skb, nest);
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001564 goto nla_put_failure;
1565 }
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001566 }
Thomas Graf7be99412012-06-13 02:54:55 +00001567 nla_nest_end(skb, nest);
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001568
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001569nla_put_failure:
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001570 return ret;
1571}
1572
Thomas Graf7be99412012-06-13 02:54:55 +00001573static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1574 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001575{
1576 struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001577 int ret, i;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001578 u8 value;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001579
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001580 if (!netdev->dcbnl_ops->setfeatcfg)
1581 return -ENOTSUPP;
1582
1583 if (!tb[DCB_ATTR_FEATCFG])
1584 return -EINVAL;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001585
1586 ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1587 dcbnl_featcfg_nest);
1588
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001589 if (ret)
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001590 goto err;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001591
1592 for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1593 if (data[i] == NULL)
1594 continue;
1595
1596 value = nla_get_u8(data[i]);
1597
1598 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1599
1600 if (ret)
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001601 goto err;
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001602 }
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001603err:
Thomas Graf7be99412012-06-13 02:54:55 +00001604 ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
Shmulik Ravid7f891cf2011-01-03 08:04:59 +00001605
Shmulik Ravidea45fe42010-12-30 06:26:55 +00001606 return ret;
1607}
1608
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001609/* Handle CEE DCBX GET commands. */
Thomas Graf7be99412012-06-13 02:54:55 +00001610static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1611 u32 seq, struct nlattr **tb, struct sk_buff *skb)
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001612{
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001613 const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001614
1615 if (!ops)
1616 return -EOPNOTSUPP;
1617
Thomas Graf7be99412012-06-13 02:54:55 +00001618 return dcbnl_cee_fill(skb, netdev);
Shmulik Raviddc6ed1d2011-02-27 05:04:38 +00001619}
1620
Thomas Graf33a03aa2012-06-13 02:54:54 +00001621struct reply_func {
1622 /* reply netlink message type */
1623 int type;
1624
1625 /* function to fill message contents */
1626 int (*cb)(struct net_device *, struct nlmsghdr *, u32,
1627 struct nlattr **, struct sk_buff *);
1628};
1629
1630static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
Thomas Graf7be99412012-06-13 02:54:55 +00001631 [DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
1632 [DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
1633 [DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
1634 [DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
1635 [DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1636 [DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
1637 [DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
1638 [DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
1639 [DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
1640 [DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
1641 [DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
1642 [DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
1643 [DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1644 [DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1645 [DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1646 [DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1647 [DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
1648 [DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
1649 [DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
1650 [DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
1651 [DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
1652 [DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
1653 [DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
1654 [DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
1655 [DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
1656 [DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
1657 [DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
Thomas Graf33a03aa2012-06-13 02:54:54 +00001658};
1659
Thomas Graf661d2962013-03-21 07:45:29 +00001660static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
Alexander Duyck2f90b862008-11-20 20:52:10 -08001661{
1662 struct net *net = sock_net(skb->sk);
1663 struct net_device *netdev;
Thomas Graf7a282bc32012-06-13 02:55:01 +00001664 struct dcbmsg *dcb = nlmsg_data(nlh);
Alexander Duyck2f90b862008-11-20 20:52:10 -08001665 struct nlattr *tb[DCB_ATTR_MAX + 1];
Eric W. Biederman15e47302012-09-07 20:12:54 +00001666 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
Alexander Duyck2f90b862008-11-20 20:52:10 -08001667 int ret = -EINVAL;
Thomas Graf33a03aa2012-06-13 02:54:54 +00001668 struct sk_buff *reply_skb;
Thomas Graf39912f92012-06-13 22:34:03 +00001669 struct nlmsghdr *reply_nlh = NULL;
Thomas Graf33a03aa2012-06-13 02:54:54 +00001670 const struct reply_func *fn;
Alexander Duyck2f90b862008-11-20 20:52:10 -08001671
Eric W. Biedermandfc47ef2012-11-16 03:03:00 +00001672 if ((nlh->nlmsg_type == RTM_SETDCB) && !capable(CAP_NET_ADMIN))
1673 return -EPERM;
1674
Alexander Duyck2f90b862008-11-20 20:52:10 -08001675 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1676 dcbnl_rtnl_policy);
1677 if (ret < 0)
1678 return ret;
1679
Thomas Graf33a03aa2012-06-13 02:54:54 +00001680 if (dcb->cmd > DCB_CMD_MAX)
1681 return -EINVAL;
1682
1683 /* check if a reply function has been defined for the command */
1684 fn = &reply_funcs[dcb->cmd];
1685 if (!fn->cb)
1686 return -EOPNOTSUPP;
1687
Alexander Duyck2f90b862008-11-20 20:52:10 -08001688 if (!tb[DCB_ATTR_IFNAME])
1689 return -EINVAL;
1690
Ying Xued9ac62b2014-01-15 10:23:39 +08001691 netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
Alexander Duyck2f90b862008-11-20 20:52:10 -08001692 if (!netdev)
Thomas Graf3d1f4862012-06-13 02:54:58 +00001693 return -ENODEV;
Alexander Duyck2f90b862008-11-20 20:52:10 -08001694
Ying Xued9ac62b2014-01-15 10:23:39 +08001695 if (!netdev->dcbnl_ops)
1696 return -EOPNOTSUPP;
Alexander Duyck2f90b862008-11-20 20:52:10 -08001697
Eric W. Biederman15e47302012-09-07 20:12:54 +00001698 reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
Thomas Graf33a03aa2012-06-13 02:54:54 +00001699 nlh->nlmsg_flags, &reply_nlh);
Ying Xued9ac62b2014-01-15 10:23:39 +08001700 if (!reply_skb)
1701 return -ENOBUFS;
Thomas Graf33a03aa2012-06-13 02:54:54 +00001702
1703 ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1704 if (ret < 0) {
1705 nlmsg_free(reply_skb);
1706 goto out;
1707 }
1708
1709 nlmsg_end(reply_skb, reply_nlh);
1710
John Fastabend7c77ab22012-12-09 20:48:13 +00001711 ret = rtnl_unicast(reply_skb, net, portid);
Alexander Duyck2f90b862008-11-20 20:52:10 -08001712out:
Alexander Duyck2f90b862008-11-20 20:52:10 -08001713 return ret;
1714}
1715
Thomas Graf716b31a2012-06-13 02:54:59 +00001716static 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
Thomas Graf4e4f2f62012-06-13 02:55:00 +00001732static 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
John Fastabend9ab933a2010-12-30 09:26:31 +00001747/**
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);
Thomas Graf716b31a2012-06-13 02:54:59 +00001760 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1761 prio = itr->app.priority;
John Fastabend9ab933a2010-12-30 09:26:31 +00001762 spin_unlock(&dcb_lock);
1763
1764 return prio;
1765}
1766EXPORT_SYMBOL(dcb_getapp);
1767
1768/**
John Fastabendb6db2172011-06-21 07:34:42 +00001769 * dcb_setapp - add CEE dcb application data to app list
John Fastabend9ab933a2010-12-30 09:26:31 +00001770 *
John Fastabendb6db2172011-06-21 07:34:42 +00001771 * 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.
John Fastabend9ab933a2010-12-30 09:26:31 +00001774 */
John Fastabendab6baf92011-06-21 07:34:58 +00001775int dcb_setapp(struct net_device *dev, struct dcb_app *new)
John Fastabend9ab933a2010-12-30 09:26:31 +00001776{
1777 struct dcb_app_type *itr;
John Fastabend7ec79272011-01-31 12:00:59 +00001778 struct dcb_app_type event;
Thomas Graf4e4f2f62012-06-13 02:55:00 +00001779 int err = 0;
John Fastabend7ec79272011-01-31 12:00:59 +00001780
Mark Rustade290ed82011-10-06 08:52:33 +00001781 event.ifindex = dev->ifindex;
John Fastabend7ec79272011-01-31 12:00:59 +00001782 memcpy(&event.app, new, sizeof(event.app));
John Fastabend6bd0e1c2011-10-06 08:52:38 +00001783 if (dev->dcbnl_ops->getdcbx)
1784 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
John Fastabend9ab933a2010-12-30 09:26:31 +00001785
1786 spin_lock(&dcb_lock);
1787 /* Search for existing match and replace */
Thomas Graf716b31a2012-06-13 02:54:59 +00001788 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);
John Fastabend9ab933a2010-12-30 09:26:31 +00001794 }
Thomas Graf716b31a2012-06-13 02:54:59 +00001795 goto out;
John Fastabend9ab933a2010-12-30 09:26:31 +00001796 }
1797 /* App type does not exist add new application type */
Thomas Graf4e4f2f62012-06-13 02:55:00 +00001798 if (new->priority)
1799 err = dcb_app_add(new, dev->ifindex);
John Fastabend9ab933a2010-12-30 09:26:31 +00001800out:
1801 spin_unlock(&dcb_lock);
Thomas Graf4e4f2f62012-06-13 02:55:00 +00001802 if (!err)
1803 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1804 return err;
John Fastabend9ab933a2010-12-30 09:26:31 +00001805}
1806EXPORT_SYMBOL(dcb_setapp);
1807
John Fastabendb6db2172011-06-21 07:34:42 +00001808/**
John Fastabenda364c8c2011-06-21 07:34:53 +00001809 * 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);
Thomas Graf716b31a2012-06-13 02:54:59 +00001821 if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1822 prio |= 1 << itr->app.priority;
John Fastabenda364c8c2011-06-21 07:34:53 +00001823 spin_unlock(&dcb_lock);
1824
1825 return prio;
1826}
1827EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1828
1829/**
John Fastabendb6db2172011-06-21 07:34:42 +00001830 * 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{
John Fastabendb6db2172011-06-21 07:34:42 +00001838 struct dcb_app_type event;
1839 int err = 0;
1840
Mark Rustade290ed82011-10-06 08:52:33 +00001841 event.ifindex = dev->ifindex;
John Fastabendb6db2172011-06-21 07:34:42 +00001842 memcpy(&event.app, new, sizeof(event.app));
John Fastabend6bd0e1c2011-10-06 08:52:38 +00001843 if (dev->dcbnl_ops->getdcbx)
1844 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
John Fastabendb6db2172011-06-21 07:34:42 +00001845
1846 spin_lock(&dcb_lock);
1847 /* Search for existing match and abort if found */
Thomas Graf716b31a2012-06-13 02:54:59 +00001848 if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1849 err = -EEXIST;
1850 goto out;
John Fastabendb6db2172011-06-21 07:34:42 +00001851 }
1852
Thomas Graf4e4f2f62012-06-13 02:55:00 +00001853 err = dcb_app_add(new, dev->ifindex);
John Fastabendb6db2172011-06-21 07:34:42 +00001854out:
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
John Fastabendf9ae7e42011-06-21 07:34:48 +00001862/**
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
Mark Rustade290ed82011-10-06 08:52:33 +00001873 event.ifindex = dev->ifindex;
John Fastabendf9ae7e42011-06-21 07:34:48 +00001874 memcpy(&event.app, del, sizeof(event.app));
John Fastabend6bd0e1c2011-10-06 08:52:38 +00001875 if (dev->dcbnl_ops->getdcbx)
1876 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
John Fastabendf9ae7e42011-06-21 07:34:48 +00001877
1878 spin_lock(&dcb_lock);
1879 /* Search for existing match and remove it. */
Thomas Graf716b31a2012-06-13 02:54:59 +00001880 if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1881 list_del(&itr->list);
1882 kfree(itr);
1883 err = 0;
John Fastabendf9ae7e42011-06-21 07:34:48 +00001884 }
1885
John Fastabendf9ae7e42011-06-21 07:34:48 +00001886 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
Shmulik Ravid7c14c3f2010-12-30 06:27:10 +00001893static void dcb_flushapp(void)
John Fastabend9ab933a2010-12-30 09:26:31 +00001894{
1895 struct dcb_app_type *app;
Dan Carpenter2a8fe002011-01-04 21:03:44 +00001896 struct dcb_app_type *tmp;
John Fastabend9ab933a2010-12-30 09:26:31 +00001897
1898 spin_lock(&dcb_lock);
Dan Carpenter2a8fe002011-01-04 21:03:44 +00001899 list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
John Fastabend9ab933a2010-12-30 09:26:31 +00001900 list_del(&app->list);
1901 kfree(app);
1902 }
1903 spin_unlock(&dcb_lock);
1904}
1905
Alexander Duyck2f90b862008-11-20 20:52:10 -08001906static int __init dcbnl_init(void)
1907{
John Fastabend9ab933a2010-12-30 09:26:31 +00001908 INIT_LIST_HEAD(&dcb_app_list);
1909
Greg Rosec7ac8672011-06-10 01:27:09 +00001910 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1911 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
Alexander Duyck2f90b862008-11-20 20:52:10 -08001912
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);
John Fastabend9ab933a2010-12-30 09:26:31 +00001921 dcb_flushapp();
Alexander Duyck2f90b862008-11-20 20:52:10 -08001922}
1923module_exit(dcbnl_exit);