Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008, Intel Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Author: Lucy Liu <lucy.liu@intel.com> |
| 18 | */ |
| 19 | |
| 20 | #include <linux/netdevice.h> |
| 21 | #include <linux/netlink.h> |
| 22 | #include <net/netlink.h> |
| 23 | #include <net/rtnetlink.h> |
| 24 | #include <linux/dcbnl.h> |
| 25 | #include <linux/rtnetlink.h> |
| 26 | #include <net/sock.h> |
| 27 | |
| 28 | /** |
| 29 | * Data Center Bridging (DCB) is a collection of Ethernet enhancements |
| 30 | * intended to allow network traffic with differing requirements |
| 31 | * (highly reliable, no drops vs. best effort vs. low latency) to operate |
| 32 | * and co-exist on Ethernet. Current DCB features are: |
| 33 | * |
| 34 | * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a |
| 35 | * framework for assigning bandwidth guarantees to traffic classes. |
| 36 | * |
| 37 | * Priority-based Flow Control (PFC) - provides a flow control mechanism which |
| 38 | * can work independently for each 802.1p priority. |
| 39 | * |
| 40 | * Congestion Notification - provides a mechanism for end-to-end congestion |
| 41 | * control for protocols which do not have built-in congestion management. |
| 42 | * |
| 43 | * More information about the emerging standards for these Ethernet features |
| 44 | * can be found at: http://www.ieee802.org/1/pages/dcbridges.html |
| 45 | * |
| 46 | * This file implements an rtnetlink interface to allow configuration of DCB |
| 47 | * features for capable devices. |
| 48 | */ |
| 49 | |
| 50 | MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>"); |
| 51 | MODULE_DESCRIPTION("Data Center Bridging generic netlink interface"); |
| 52 | MODULE_LICENSE("GPL"); |
| 53 | |
| 54 | /**************** DCB attribute policies *************************************/ |
| 55 | |
| 56 | /* DCB netlink attributes policy */ |
| 57 | static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = { |
| 58 | [DCB_ATTR_IFNAME] = {.type = NLA_STRING, .len = IFNAMSIZ - 1}, |
| 59 | [DCB_ATTR_STATE] = {.type = NLA_U8}, |
| 60 | [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED}, |
| 61 | [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED}, |
| 62 | [DCB_ATTR_SET_ALL] = {.type = NLA_U8}, |
| 63 | [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG}, |
Alexander Duyck | 4613218 | 2008-11-20 21:05:08 -0800 | [diff] [blame^] | 64 | [DCB_ATTR_CAP] = {.type = NLA_NESTED}, |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | /* DCB priority flow control to User Priority nested attributes */ |
| 68 | static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = { |
| 69 | [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8}, |
| 70 | [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8}, |
| 71 | [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8}, |
| 72 | [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8}, |
| 73 | [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8}, |
| 74 | [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8}, |
| 75 | [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8}, |
| 76 | [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8}, |
| 77 | [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG}, |
| 78 | }; |
| 79 | |
| 80 | /* DCB priority grouping nested attributes */ |
| 81 | static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = { |
| 82 | [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED}, |
| 83 | [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED}, |
| 84 | [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED}, |
| 85 | [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED}, |
| 86 | [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED}, |
| 87 | [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED}, |
| 88 | [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED}, |
| 89 | [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED}, |
| 90 | [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED}, |
| 91 | [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8}, |
| 92 | [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8}, |
| 93 | [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8}, |
| 94 | [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8}, |
| 95 | [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8}, |
| 96 | [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8}, |
| 97 | [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8}, |
| 98 | [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8}, |
| 99 | [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG}, |
| 100 | }; |
| 101 | |
| 102 | /* DCB traffic class nested attributes. */ |
| 103 | static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = { |
| 104 | [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8}, |
| 105 | [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8}, |
| 106 | [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8}, |
| 107 | [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8}, |
| 108 | [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG}, |
| 109 | }; |
| 110 | |
Alexander Duyck | 4613218 | 2008-11-20 21:05:08 -0800 | [diff] [blame^] | 111 | /* DCB capabilities nested attributes. */ |
| 112 | static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = { |
| 113 | [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG}, |
| 114 | [DCB_CAP_ATTR_PG] = {.type = NLA_U8}, |
| 115 | [DCB_CAP_ATTR_PFC] = {.type = NLA_U8}, |
| 116 | [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8}, |
| 117 | [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8}, |
| 118 | [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8}, |
| 119 | [DCB_CAP_ATTR_GSP] = {.type = NLA_U8}, |
| 120 | [DCB_CAP_ATTR_BCN] = {.type = NLA_U8}, |
| 121 | }; |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 122 | |
| 123 | /* standard netlink reply call */ |
| 124 | static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid, |
| 125 | u32 seq, u16 flags) |
| 126 | { |
| 127 | struct sk_buff *dcbnl_skb; |
| 128 | struct dcbmsg *dcb; |
| 129 | struct nlmsghdr *nlh; |
| 130 | int ret = -EINVAL; |
| 131 | |
| 132 | dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 133 | if (!dcbnl_skb) |
| 134 | return ret; |
| 135 | |
| 136 | nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags); |
| 137 | |
| 138 | dcb = NLMSG_DATA(nlh); |
| 139 | dcb->dcb_family = AF_UNSPEC; |
| 140 | dcb->cmd = cmd; |
| 141 | dcb->dcb_pad = 0; |
| 142 | |
| 143 | ret = nla_put_u8(dcbnl_skb, attr, value); |
| 144 | if (ret) |
| 145 | goto err; |
| 146 | |
| 147 | /* end the message, assign the nlmsg_len. */ |
| 148 | nlmsg_end(dcbnl_skb, nlh); |
| 149 | ret = rtnl_unicast(dcbnl_skb, &init_net, pid); |
| 150 | if (ret) |
| 151 | goto err; |
| 152 | |
| 153 | return 0; |
| 154 | nlmsg_failure: |
| 155 | err: |
| 156 | kfree(dcbnl_skb); |
| 157 | return ret; |
| 158 | } |
| 159 | |
| 160 | static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb, |
| 161 | u32 pid, u32 seq, u16 flags) |
| 162 | { |
| 163 | int ret = -EINVAL; |
| 164 | |
| 165 | /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */ |
| 166 | if (!netdev->dcbnl_ops->getstate) |
| 167 | return ret; |
| 168 | |
| 169 | ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB, |
| 170 | DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags); |
| 171 | |
| 172 | return ret; |
| 173 | } |
| 174 | |
| 175 | static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb, |
| 176 | u32 pid, u32 seq, u16 flags) |
| 177 | { |
| 178 | struct sk_buff *dcbnl_skb; |
| 179 | struct nlmsghdr *nlh; |
| 180 | struct dcbmsg *dcb; |
| 181 | struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest; |
| 182 | u8 value; |
| 183 | int ret = -EINVAL; |
| 184 | int i; |
| 185 | int getall = 0; |
| 186 | |
| 187 | if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg) |
| 188 | return ret; |
| 189 | |
| 190 | ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX, |
| 191 | tb[DCB_ATTR_PFC_CFG], |
| 192 | dcbnl_pfc_up_nest); |
| 193 | if (ret) |
| 194 | goto err_out; |
| 195 | |
| 196 | dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 197 | if (!dcbnl_skb) |
| 198 | goto err_out; |
| 199 | |
| 200 | nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags); |
| 201 | |
| 202 | dcb = NLMSG_DATA(nlh); |
| 203 | dcb->dcb_family = AF_UNSPEC; |
| 204 | dcb->cmd = DCB_CMD_PFC_GCFG; |
| 205 | |
| 206 | nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG); |
| 207 | if (!nest) |
| 208 | goto err; |
| 209 | |
| 210 | if (data[DCB_PFC_UP_ATTR_ALL]) |
| 211 | getall = 1; |
| 212 | |
| 213 | for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) { |
| 214 | if (!getall && !data[i]) |
| 215 | continue; |
| 216 | |
| 217 | netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, |
| 218 | &value); |
| 219 | ret = nla_put_u8(dcbnl_skb, i, value); |
| 220 | |
| 221 | if (ret) { |
| 222 | nla_nest_cancel(dcbnl_skb, nest); |
| 223 | goto err; |
| 224 | } |
| 225 | } |
| 226 | nla_nest_end(dcbnl_skb, nest); |
| 227 | |
| 228 | nlmsg_end(dcbnl_skb, nlh); |
| 229 | |
| 230 | ret = rtnl_unicast(dcbnl_skb, &init_net, pid); |
| 231 | if (ret) |
| 232 | goto err; |
| 233 | |
| 234 | return 0; |
| 235 | nlmsg_failure: |
| 236 | err: |
| 237 | kfree(dcbnl_skb); |
| 238 | err_out: |
| 239 | return -EINVAL; |
| 240 | } |
| 241 | |
| 242 | static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb, |
| 243 | u32 pid, u32 seq, u16 flags) |
| 244 | { |
| 245 | struct sk_buff *dcbnl_skb; |
| 246 | struct nlmsghdr *nlh; |
| 247 | struct dcbmsg *dcb; |
| 248 | u8 perm_addr[MAX_ADDR_LEN]; |
| 249 | int ret = -EINVAL; |
| 250 | |
| 251 | if (!netdev->dcbnl_ops->getpermhwaddr) |
| 252 | return ret; |
| 253 | |
| 254 | dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 255 | if (!dcbnl_skb) |
| 256 | goto err_out; |
| 257 | |
| 258 | nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags); |
| 259 | |
| 260 | dcb = NLMSG_DATA(nlh); |
| 261 | dcb->dcb_family = AF_UNSPEC; |
| 262 | dcb->cmd = DCB_CMD_GPERM_HWADDR; |
| 263 | |
| 264 | netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr); |
| 265 | |
| 266 | ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), |
| 267 | perm_addr); |
| 268 | |
| 269 | nlmsg_end(dcbnl_skb, nlh); |
| 270 | |
| 271 | ret = rtnl_unicast(dcbnl_skb, &init_net, pid); |
| 272 | if (ret) |
| 273 | goto err; |
| 274 | |
| 275 | return 0; |
| 276 | |
| 277 | nlmsg_failure: |
| 278 | err: |
| 279 | kfree(dcbnl_skb); |
| 280 | err_out: |
| 281 | return -EINVAL; |
| 282 | } |
| 283 | |
Alexander Duyck | 4613218 | 2008-11-20 21:05:08 -0800 | [diff] [blame^] | 284 | static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb, |
| 285 | u32 pid, u32 seq, u16 flags) |
| 286 | { |
| 287 | struct sk_buff *dcbnl_skb; |
| 288 | struct nlmsghdr *nlh; |
| 289 | struct dcbmsg *dcb; |
| 290 | struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest; |
| 291 | u8 value; |
| 292 | int ret = -EINVAL; |
| 293 | int i; |
| 294 | int getall = 0; |
| 295 | |
| 296 | if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap) |
| 297 | return ret; |
| 298 | |
| 299 | ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP], |
| 300 | dcbnl_cap_nest); |
| 301 | if (ret) |
| 302 | goto err_out; |
| 303 | |
| 304 | dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 305 | if (!dcbnl_skb) |
| 306 | goto err_out; |
| 307 | |
| 308 | nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags); |
| 309 | |
| 310 | dcb = NLMSG_DATA(nlh); |
| 311 | dcb->dcb_family = AF_UNSPEC; |
| 312 | dcb->cmd = DCB_CMD_GCAP; |
| 313 | |
| 314 | nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP); |
| 315 | if (!nest) |
| 316 | goto err; |
| 317 | |
| 318 | if (data[DCB_CAP_ATTR_ALL]) |
| 319 | getall = 1; |
| 320 | |
| 321 | for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) { |
| 322 | if (!getall && !data[i]) |
| 323 | continue; |
| 324 | |
| 325 | if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) { |
| 326 | ret = nla_put_u8(dcbnl_skb, i, value); |
| 327 | |
| 328 | if (ret) { |
| 329 | nla_nest_cancel(dcbnl_skb, nest); |
| 330 | goto err; |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | nla_nest_end(dcbnl_skb, nest); |
| 335 | |
| 336 | nlmsg_end(dcbnl_skb, nlh); |
| 337 | |
| 338 | ret = rtnl_unicast(dcbnl_skb, &init_net, pid); |
| 339 | if (ret) |
| 340 | goto err; |
| 341 | |
| 342 | return 0; |
| 343 | nlmsg_failure: |
| 344 | err: |
| 345 | kfree(dcbnl_skb); |
| 346 | err_out: |
| 347 | return -EINVAL; |
| 348 | } |
| 349 | |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 350 | static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb, |
| 351 | u32 pid, u32 seq, u16 flags, int dir) |
| 352 | { |
| 353 | struct sk_buff *dcbnl_skb; |
| 354 | struct nlmsghdr *nlh; |
| 355 | struct dcbmsg *dcb; |
| 356 | struct nlattr *pg_nest, *param_nest, *data; |
| 357 | struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1]; |
| 358 | struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1]; |
| 359 | u8 prio, pgid, tc_pct, up_map; |
| 360 | int ret = -EINVAL; |
| 361 | int getall = 0; |
| 362 | int i; |
| 363 | |
| 364 | if (!tb[DCB_ATTR_PG_CFG] || |
| 365 | !netdev->dcbnl_ops->getpgtccfgtx || |
| 366 | !netdev->dcbnl_ops->getpgtccfgrx || |
| 367 | !netdev->dcbnl_ops->getpgbwgcfgtx || |
| 368 | !netdev->dcbnl_ops->getpgbwgcfgrx) |
| 369 | return ret; |
| 370 | |
| 371 | ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, |
| 372 | tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest); |
| 373 | |
| 374 | if (ret) |
| 375 | goto err_out; |
| 376 | |
| 377 | dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 378 | if (!dcbnl_skb) |
| 379 | goto err_out; |
| 380 | |
| 381 | nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags); |
| 382 | |
| 383 | dcb = NLMSG_DATA(nlh); |
| 384 | dcb->dcb_family = AF_UNSPEC; |
| 385 | dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG; |
| 386 | |
| 387 | pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG); |
| 388 | if (!pg_nest) |
| 389 | goto err; |
| 390 | |
| 391 | if (pg_tb[DCB_PG_ATTR_TC_ALL]) |
| 392 | getall = 1; |
| 393 | |
| 394 | for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) { |
| 395 | if (!getall && !pg_tb[i]) |
| 396 | continue; |
| 397 | |
| 398 | if (pg_tb[DCB_PG_ATTR_TC_ALL]) |
| 399 | data = pg_tb[DCB_PG_ATTR_TC_ALL]; |
| 400 | else |
| 401 | data = pg_tb[i]; |
| 402 | ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX, |
| 403 | data, dcbnl_tc_param_nest); |
| 404 | if (ret) |
| 405 | goto err_pg; |
| 406 | |
| 407 | param_nest = nla_nest_start(dcbnl_skb, i); |
| 408 | if (!param_nest) |
| 409 | goto err_pg; |
| 410 | |
| 411 | pgid = DCB_ATTR_VALUE_UNDEFINED; |
| 412 | prio = DCB_ATTR_VALUE_UNDEFINED; |
| 413 | tc_pct = DCB_ATTR_VALUE_UNDEFINED; |
| 414 | up_map = DCB_ATTR_VALUE_UNDEFINED; |
| 415 | |
| 416 | if (dir) { |
| 417 | /* Rx */ |
| 418 | netdev->dcbnl_ops->getpgtccfgrx(netdev, |
| 419 | i - DCB_PG_ATTR_TC_0, &prio, |
| 420 | &pgid, &tc_pct, &up_map); |
| 421 | } else { |
| 422 | /* Tx */ |
| 423 | netdev->dcbnl_ops->getpgtccfgtx(netdev, |
| 424 | i - DCB_PG_ATTR_TC_0, &prio, |
| 425 | &pgid, &tc_pct, &up_map); |
| 426 | } |
| 427 | |
| 428 | if (param_tb[DCB_TC_ATTR_PARAM_PGID] || |
| 429 | param_tb[DCB_TC_ATTR_PARAM_ALL]) { |
| 430 | ret = nla_put_u8(dcbnl_skb, |
| 431 | DCB_TC_ATTR_PARAM_PGID, pgid); |
| 432 | if (ret) |
| 433 | goto err_param; |
| 434 | } |
| 435 | if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] || |
| 436 | param_tb[DCB_TC_ATTR_PARAM_ALL]) { |
| 437 | ret = nla_put_u8(dcbnl_skb, |
| 438 | DCB_TC_ATTR_PARAM_UP_MAPPING, up_map); |
| 439 | if (ret) |
| 440 | goto err_param; |
| 441 | } |
| 442 | if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] || |
| 443 | param_tb[DCB_TC_ATTR_PARAM_ALL]) { |
| 444 | ret = nla_put_u8(dcbnl_skb, |
| 445 | DCB_TC_ATTR_PARAM_STRICT_PRIO, prio); |
| 446 | if (ret) |
| 447 | goto err_param; |
| 448 | } |
| 449 | if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] || |
| 450 | param_tb[DCB_TC_ATTR_PARAM_ALL]) { |
| 451 | ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT, |
| 452 | tc_pct); |
| 453 | if (ret) |
| 454 | goto err_param; |
| 455 | } |
| 456 | nla_nest_end(dcbnl_skb, param_nest); |
| 457 | } |
| 458 | |
| 459 | if (pg_tb[DCB_PG_ATTR_BW_ID_ALL]) |
| 460 | getall = 1; |
| 461 | else |
| 462 | getall = 0; |
| 463 | |
| 464 | for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) { |
| 465 | if (!getall && !pg_tb[i]) |
| 466 | continue; |
| 467 | |
| 468 | tc_pct = DCB_ATTR_VALUE_UNDEFINED; |
| 469 | |
| 470 | if (dir) { |
| 471 | /* Rx */ |
| 472 | netdev->dcbnl_ops->getpgbwgcfgrx(netdev, |
| 473 | i - DCB_PG_ATTR_BW_ID_0, &tc_pct); |
| 474 | } else { |
| 475 | /* Tx */ |
| 476 | netdev->dcbnl_ops->getpgbwgcfgtx(netdev, |
| 477 | i - DCB_PG_ATTR_BW_ID_0, &tc_pct); |
| 478 | } |
| 479 | ret = nla_put_u8(dcbnl_skb, i, tc_pct); |
| 480 | |
| 481 | if (ret) |
| 482 | goto err_pg; |
| 483 | } |
| 484 | |
| 485 | nla_nest_end(dcbnl_skb, pg_nest); |
| 486 | |
| 487 | nlmsg_end(dcbnl_skb, nlh); |
| 488 | |
| 489 | ret = rtnl_unicast(dcbnl_skb, &init_net, pid); |
| 490 | if (ret) |
| 491 | goto err; |
| 492 | |
| 493 | return 0; |
| 494 | |
| 495 | err_param: |
| 496 | nla_nest_cancel(dcbnl_skb, param_nest); |
| 497 | err_pg: |
| 498 | nla_nest_cancel(dcbnl_skb, pg_nest); |
| 499 | nlmsg_failure: |
| 500 | err: |
| 501 | kfree(dcbnl_skb); |
| 502 | err_out: |
| 503 | ret = -EINVAL; |
| 504 | return ret; |
| 505 | } |
| 506 | |
| 507 | static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb, |
| 508 | u32 pid, u32 seq, u16 flags) |
| 509 | { |
| 510 | return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0); |
| 511 | } |
| 512 | |
| 513 | static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb, |
| 514 | u32 pid, u32 seq, u16 flags) |
| 515 | { |
| 516 | return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1); |
| 517 | } |
| 518 | |
| 519 | static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb, |
| 520 | u32 pid, u32 seq, u16 flags) |
| 521 | { |
| 522 | int ret = -EINVAL; |
| 523 | u8 value; |
| 524 | |
| 525 | if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate) |
| 526 | return ret; |
| 527 | |
| 528 | value = nla_get_u8(tb[DCB_ATTR_STATE]); |
| 529 | |
| 530 | netdev->dcbnl_ops->setstate(netdev, value); |
| 531 | |
| 532 | ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE, |
| 533 | pid, seq, flags); |
| 534 | |
| 535 | return ret; |
| 536 | } |
| 537 | |
| 538 | static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb, |
| 539 | u32 pid, u32 seq, u16 flags) |
| 540 | { |
| 541 | struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1]; |
| 542 | int i; |
| 543 | int ret = -EINVAL; |
| 544 | u8 value; |
| 545 | |
| 546 | if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg) |
| 547 | return ret; |
| 548 | |
| 549 | ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX, |
| 550 | tb[DCB_ATTR_PFC_CFG], |
| 551 | dcbnl_pfc_up_nest); |
| 552 | if (ret) |
| 553 | goto err; |
| 554 | |
| 555 | for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) { |
| 556 | if (data[i] == NULL) |
| 557 | continue; |
| 558 | value = nla_get_u8(data[i]); |
| 559 | netdev->dcbnl_ops->setpfccfg(netdev, |
| 560 | data[i]->nla_type - DCB_PFC_UP_ATTR_0, value); |
| 561 | } |
| 562 | |
| 563 | ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG, |
| 564 | pid, seq, flags); |
| 565 | err: |
| 566 | return ret; |
| 567 | } |
| 568 | |
| 569 | static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb, |
| 570 | u32 pid, u32 seq, u16 flags) |
| 571 | { |
| 572 | int ret = -EINVAL; |
| 573 | |
| 574 | if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall) |
| 575 | return ret; |
| 576 | |
| 577 | ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB, |
| 578 | DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags); |
| 579 | |
| 580 | return ret; |
| 581 | } |
| 582 | |
| 583 | static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb, |
| 584 | u32 pid, u32 seq, u16 flags, int dir) |
| 585 | { |
| 586 | struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1]; |
| 587 | struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1]; |
| 588 | int ret = -EINVAL; |
| 589 | int i; |
| 590 | u8 pgid; |
| 591 | u8 up_map; |
| 592 | u8 prio; |
| 593 | u8 tc_pct; |
| 594 | |
| 595 | if (!tb[DCB_ATTR_PG_CFG] || |
| 596 | !netdev->dcbnl_ops->setpgtccfgtx || |
| 597 | !netdev->dcbnl_ops->setpgtccfgrx || |
| 598 | !netdev->dcbnl_ops->setpgbwgcfgtx || |
| 599 | !netdev->dcbnl_ops->setpgbwgcfgrx) |
| 600 | return ret; |
| 601 | |
| 602 | ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, |
| 603 | tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest); |
| 604 | if (ret) |
| 605 | goto err; |
| 606 | |
| 607 | for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) { |
| 608 | if (!pg_tb[i]) |
| 609 | continue; |
| 610 | |
| 611 | ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX, |
| 612 | pg_tb[i], dcbnl_tc_param_nest); |
| 613 | if (ret) |
| 614 | goto err; |
| 615 | |
| 616 | pgid = DCB_ATTR_VALUE_UNDEFINED; |
| 617 | prio = DCB_ATTR_VALUE_UNDEFINED; |
| 618 | tc_pct = DCB_ATTR_VALUE_UNDEFINED; |
| 619 | up_map = DCB_ATTR_VALUE_UNDEFINED; |
| 620 | |
| 621 | if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]) |
| 622 | prio = |
| 623 | nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]); |
| 624 | |
| 625 | if (param_tb[DCB_TC_ATTR_PARAM_PGID]) |
| 626 | pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]); |
| 627 | |
| 628 | if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT]) |
| 629 | tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]); |
| 630 | |
| 631 | if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]) |
| 632 | up_map = |
| 633 | nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]); |
| 634 | |
| 635 | /* dir: Tx = 0, Rx = 1 */ |
| 636 | if (dir) { |
| 637 | /* Rx */ |
| 638 | netdev->dcbnl_ops->setpgtccfgrx(netdev, |
| 639 | i - DCB_PG_ATTR_TC_0, |
| 640 | prio, pgid, tc_pct, up_map); |
| 641 | } else { |
| 642 | /* Tx */ |
| 643 | netdev->dcbnl_ops->setpgtccfgtx(netdev, |
| 644 | i - DCB_PG_ATTR_TC_0, |
| 645 | prio, pgid, tc_pct, up_map); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) { |
| 650 | if (!pg_tb[i]) |
| 651 | continue; |
| 652 | |
| 653 | tc_pct = nla_get_u8(pg_tb[i]); |
| 654 | |
| 655 | /* dir: Tx = 0, Rx = 1 */ |
| 656 | if (dir) { |
| 657 | /* Rx */ |
| 658 | netdev->dcbnl_ops->setpgbwgcfgrx(netdev, |
| 659 | i - DCB_PG_ATTR_BW_ID_0, tc_pct); |
| 660 | } else { |
| 661 | /* Tx */ |
| 662 | netdev->dcbnl_ops->setpgbwgcfgtx(netdev, |
| 663 | i - DCB_PG_ATTR_BW_ID_0, tc_pct); |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | ret = dcbnl_reply(0, RTM_SETDCB, |
| 668 | (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG), |
| 669 | DCB_ATTR_PG_CFG, pid, seq, flags); |
| 670 | |
| 671 | err: |
| 672 | return ret; |
| 673 | } |
| 674 | |
| 675 | static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb, |
| 676 | u32 pid, u32 seq, u16 flags) |
| 677 | { |
| 678 | return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0); |
| 679 | } |
| 680 | |
| 681 | static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb, |
| 682 | u32 pid, u32 seq, u16 flags) |
| 683 | { |
| 684 | return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1); |
| 685 | } |
| 686 | |
| 687 | static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 688 | { |
| 689 | struct net *net = sock_net(skb->sk); |
| 690 | struct net_device *netdev; |
| 691 | struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh); |
| 692 | struct nlattr *tb[DCB_ATTR_MAX + 1]; |
| 693 | u32 pid = skb ? NETLINK_CB(skb).pid : 0; |
| 694 | int ret = -EINVAL; |
| 695 | |
| 696 | if (net != &init_net) |
| 697 | return -EINVAL; |
| 698 | |
| 699 | ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX, |
| 700 | dcbnl_rtnl_policy); |
| 701 | if (ret < 0) |
| 702 | return ret; |
| 703 | |
| 704 | if (!tb[DCB_ATTR_IFNAME]) |
| 705 | return -EINVAL; |
| 706 | |
| 707 | netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME])); |
| 708 | if (!netdev) |
| 709 | return -EINVAL; |
| 710 | |
| 711 | if (!netdev->dcbnl_ops) |
| 712 | goto errout; |
| 713 | |
| 714 | switch (dcb->cmd) { |
| 715 | case DCB_CMD_GSTATE: |
| 716 | ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq, |
| 717 | nlh->nlmsg_flags); |
| 718 | goto out; |
| 719 | case DCB_CMD_PFC_GCFG: |
| 720 | ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq, |
| 721 | nlh->nlmsg_flags); |
| 722 | goto out; |
| 723 | case DCB_CMD_GPERM_HWADDR: |
| 724 | ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq, |
| 725 | nlh->nlmsg_flags); |
| 726 | goto out; |
| 727 | case DCB_CMD_PGTX_GCFG: |
| 728 | ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq, |
| 729 | nlh->nlmsg_flags); |
| 730 | goto out; |
| 731 | case DCB_CMD_PGRX_GCFG: |
| 732 | ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq, |
| 733 | nlh->nlmsg_flags); |
| 734 | goto out; |
| 735 | case DCB_CMD_SSTATE: |
| 736 | ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq, |
| 737 | nlh->nlmsg_flags); |
| 738 | goto out; |
| 739 | case DCB_CMD_PFC_SCFG: |
| 740 | ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq, |
| 741 | nlh->nlmsg_flags); |
| 742 | goto out; |
| 743 | |
| 744 | case DCB_CMD_SET_ALL: |
| 745 | ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq, |
| 746 | nlh->nlmsg_flags); |
| 747 | goto out; |
| 748 | case DCB_CMD_PGTX_SCFG: |
| 749 | ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq, |
| 750 | nlh->nlmsg_flags); |
| 751 | goto out; |
| 752 | case DCB_CMD_PGRX_SCFG: |
| 753 | ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq, |
| 754 | nlh->nlmsg_flags); |
| 755 | goto out; |
Alexander Duyck | 4613218 | 2008-11-20 21:05:08 -0800 | [diff] [blame^] | 756 | case DCB_CMD_GCAP: |
| 757 | ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq, |
| 758 | nlh->nlmsg_flags); |
| 759 | goto out; |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 760 | default: |
| 761 | goto errout; |
| 762 | } |
| 763 | errout: |
| 764 | ret = -EINVAL; |
| 765 | out: |
| 766 | dev_put(netdev); |
| 767 | return ret; |
| 768 | } |
| 769 | |
| 770 | static int __init dcbnl_init(void) |
| 771 | { |
| 772 | rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL); |
| 773 | rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL); |
| 774 | |
| 775 | return 0; |
| 776 | } |
| 777 | module_init(dcbnl_init); |
| 778 | |
| 779 | static void __exit dcbnl_exit(void) |
| 780 | { |
| 781 | rtnl_unregister(PF_UNSPEC, RTM_GETDCB); |
| 782 | rtnl_unregister(PF_UNSPEC, RTM_SETDCB); |
| 783 | } |
| 784 | module_exit(dcbnl_exit); |
| 785 | |
| 786 | |