Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 1 | /* Copyright (C) 2016 B.A.T.M.A.N. contributors: |
| 2 | * |
| 3 | * Matthias Schiffer |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of version 2 of the GNU General Public |
| 7 | * License as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #include "netlink.h" |
| 19 | #include "main.h" |
| 20 | |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 21 | #include <linux/errno.h> |
| 22 | #include <linux/fs.h> |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 23 | #include <linux/genetlink.h> |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 24 | #include <linux/if_ether.h> |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 25 | #include <linux/init.h> |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 26 | #include <linux/netdevice.h> |
| 27 | #include <linux/netlink.h> |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 28 | #include <linux/printk.h> |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 29 | #include <linux/rculist.h> |
| 30 | #include <linux/rcupdate.h> |
| 31 | #include <linux/skbuff.h> |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 32 | #include <linux/stddef.h> |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 33 | #include <linux/types.h> |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 34 | #include <net/genetlink.h> |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 35 | #include <net/netlink.h> |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 36 | #include <net/sock.h> |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 37 | #include <uapi/linux/batman_adv.h> |
| 38 | |
Matthias Schiffer | 07a3061 | 2016-07-03 13:31:35 +0200 | [diff] [blame] | 39 | #include "bat_algo.h" |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 40 | #include "hard-interface.h" |
| 41 | #include "soft-interface.h" |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 42 | #include "tp_meter.h" |
Matthias Schiffer | d34f055 | 2016-07-03 13:31:37 +0200 | [diff] [blame^] | 43 | #include "translation-table.h" |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 44 | |
Matthias Schiffer | 07a3061 | 2016-07-03 13:31:35 +0200 | [diff] [blame] | 45 | struct genl_family batadv_netlink_family = { |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 46 | .id = GENL_ID_GENERATE, |
| 47 | .hdrsize = 0, |
| 48 | .name = BATADV_NL_NAME, |
| 49 | .version = 1, |
| 50 | .maxattr = BATADV_ATTR_MAX, |
| 51 | }; |
| 52 | |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 53 | /* multicast groups */ |
| 54 | enum batadv_netlink_multicast_groups { |
| 55 | BATADV_NL_MCGRP_TPMETER, |
| 56 | }; |
| 57 | |
| 58 | static struct genl_multicast_group batadv_netlink_mcgrps[] = { |
| 59 | [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER }, |
| 60 | }; |
| 61 | |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 62 | static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { |
| 63 | [BATADV_ATTR_VERSION] = { .type = NLA_STRING }, |
| 64 | [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING }, |
| 65 | [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 }, |
| 66 | [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING }, |
| 67 | [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN }, |
| 68 | [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 }, |
| 69 | [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING }, |
| 70 | [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN }, |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 71 | [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN }, |
| 72 | [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 }, |
| 73 | [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 }, |
| 74 | [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 }, |
| 75 | [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 }, |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 76 | [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG }, |
Matthias Schiffer | d34f055 | 2016-07-03 13:31:37 +0200 | [diff] [blame^] | 77 | [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN }, |
| 78 | [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 }, |
| 79 | [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 }, |
| 80 | [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 }, |
| 81 | [BATADV_ATTR_TT_VID] = { .type = NLA_U16 }, |
| 82 | [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 }, |
| 83 | [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG }, |
| 84 | [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | /** |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 88 | * batadv_netlink_get_ifindex - Extract an interface index from a message |
| 89 | * @nlh: Message header |
| 90 | * @attrtype: Attribute which holds an interface index |
| 91 | * |
| 92 | * Return: interface index, or 0. |
| 93 | */ |
Matthias Schiffer | d34f055 | 2016-07-03 13:31:37 +0200 | [diff] [blame^] | 94 | int |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 95 | batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) |
| 96 | { |
| 97 | struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); |
| 98 | |
| 99 | return attr ? nla_get_u32(attr) : 0; |
| 100 | } |
| 101 | |
| 102 | /** |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 103 | * batadv_netlink_mesh_info_put - fill in generic information about mesh |
| 104 | * interface |
| 105 | * @msg: netlink message to be sent back |
| 106 | * @soft_iface: interface for which the data should be taken |
| 107 | * |
| 108 | * Return: 0 on success, < 0 on error |
| 109 | */ |
| 110 | static int |
| 111 | batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface) |
| 112 | { |
| 113 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
| 114 | struct batadv_hard_iface *primary_if = NULL; |
| 115 | struct net_device *hard_iface; |
| 116 | int ret = -ENOBUFS; |
| 117 | |
| 118 | if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) || |
| 119 | nla_put_string(msg, BATADV_ATTR_ALGO_NAME, |
Antonio Quartulli | 29824a5 | 2016-05-25 23:27:31 +0800 | [diff] [blame] | 120 | bat_priv->algo_ops->name) || |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 121 | nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) || |
| 122 | nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) || |
| 123 | nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN, |
| 124 | soft_iface->dev_addr)) |
| 125 | goto out; |
| 126 | |
| 127 | primary_if = batadv_primary_if_get_selected(bat_priv); |
| 128 | if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) { |
| 129 | hard_iface = primary_if->net_dev; |
| 130 | |
| 131 | if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, |
| 132 | hard_iface->ifindex) || |
| 133 | nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, |
| 134 | hard_iface->name) || |
| 135 | nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, |
| 136 | hard_iface->dev_addr)) |
| 137 | goto out; |
| 138 | } |
| 139 | |
| 140 | ret = 0; |
| 141 | |
| 142 | out: |
| 143 | if (primary_if) |
| 144 | batadv_hardif_put(primary_if); |
| 145 | |
| 146 | return ret; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * batadv_netlink_get_mesh_info - handle incoming BATADV_CMD_GET_MESH_INFO |
| 151 | * netlink request |
| 152 | * @skb: received netlink message |
| 153 | * @info: receiver information |
| 154 | * |
| 155 | * Return: 0 on success, < 0 on error |
| 156 | */ |
| 157 | static int |
| 158 | batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info) |
| 159 | { |
| 160 | struct net *net = genl_info_net(info); |
| 161 | struct net_device *soft_iface; |
| 162 | struct sk_buff *msg = NULL; |
| 163 | void *msg_head; |
| 164 | int ifindex; |
| 165 | int ret; |
| 166 | |
| 167 | if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) |
| 168 | return -EINVAL; |
| 169 | |
| 170 | ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); |
| 171 | if (!ifindex) |
| 172 | return -EINVAL; |
| 173 | |
| 174 | soft_iface = dev_get_by_index(net, ifindex); |
| 175 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { |
| 176 | ret = -ENODEV; |
| 177 | goto out; |
| 178 | } |
| 179 | |
| 180 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 181 | if (!msg) { |
| 182 | ret = -ENOMEM; |
| 183 | goto out; |
| 184 | } |
| 185 | |
| 186 | msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq, |
| 187 | &batadv_netlink_family, 0, |
| 188 | BATADV_CMD_GET_MESH_INFO); |
| 189 | if (!msg_head) { |
| 190 | ret = -ENOBUFS; |
| 191 | goto out; |
| 192 | } |
| 193 | |
| 194 | ret = batadv_netlink_mesh_info_put(msg, soft_iface); |
| 195 | |
| 196 | out: |
| 197 | if (soft_iface) |
| 198 | dev_put(soft_iface); |
| 199 | |
| 200 | if (ret) { |
| 201 | if (msg) |
| 202 | nlmsg_free(msg); |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | genlmsg_end(msg, msg_head); |
| 207 | return genlmsg_reply(msg, info); |
| 208 | } |
| 209 | |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 210 | /** |
| 211 | * batadv_netlink_tp_meter_put - Fill information of started tp_meter session |
| 212 | * @msg: netlink message to be sent back |
| 213 | * @cookie: tp meter session cookie |
| 214 | * |
| 215 | * Return: 0 on success, < 0 on error |
| 216 | */ |
| 217 | static int |
| 218 | batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie) |
| 219 | { |
| 220 | if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) |
| 221 | return -ENOBUFS; |
| 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * batadv_netlink_tpmeter_notify - send tp_meter result via netlink to client |
| 228 | * @bat_priv: the bat priv with all the soft interface information |
| 229 | * @dst: destination of tp_meter session |
| 230 | * @result: reason for tp meter session stop |
| 231 | * @test_time: total time ot the tp_meter session |
| 232 | * @total_bytes: bytes acked to the receiver |
| 233 | * @cookie: cookie of tp_meter session |
| 234 | * |
| 235 | * Return: 0 on success, < 0 on error |
| 236 | */ |
| 237 | int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, |
| 238 | u8 result, u32 test_time, u64 total_bytes, |
| 239 | u32 cookie) |
| 240 | { |
| 241 | struct sk_buff *msg; |
| 242 | void *hdr; |
| 243 | int ret; |
| 244 | |
| 245 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 246 | if (!msg) |
| 247 | return -ENOMEM; |
| 248 | |
| 249 | hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0, |
| 250 | BATADV_CMD_TP_METER); |
| 251 | if (!hdr) { |
| 252 | ret = -ENOBUFS; |
| 253 | goto err_genlmsg; |
| 254 | } |
| 255 | |
| 256 | if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) |
| 257 | goto nla_put_failure; |
| 258 | |
| 259 | if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time)) |
| 260 | goto nla_put_failure; |
| 261 | |
| 262 | if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes, |
| 263 | BATADV_ATTR_PAD)) |
| 264 | goto nla_put_failure; |
| 265 | |
| 266 | if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result)) |
| 267 | goto nla_put_failure; |
| 268 | |
| 269 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst)) |
| 270 | goto nla_put_failure; |
| 271 | |
| 272 | genlmsg_end(msg, hdr); |
| 273 | |
| 274 | genlmsg_multicast_netns(&batadv_netlink_family, |
| 275 | dev_net(bat_priv->soft_iface), msg, 0, |
| 276 | BATADV_NL_MCGRP_TPMETER, GFP_KERNEL); |
| 277 | |
| 278 | return 0; |
| 279 | |
| 280 | nla_put_failure: |
| 281 | genlmsg_cancel(msg, hdr); |
| 282 | ret = -EMSGSIZE; |
| 283 | |
| 284 | err_genlmsg: |
| 285 | nlmsg_free(msg); |
| 286 | return ret; |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * batadv_netlink_tp_meter_start - Start a new tp_meter session |
| 291 | * @skb: received netlink message |
| 292 | * @info: receiver information |
| 293 | * |
| 294 | * Return: 0 on success, < 0 on error |
| 295 | */ |
| 296 | static int |
| 297 | batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info) |
| 298 | { |
| 299 | struct net *net = genl_info_net(info); |
| 300 | struct net_device *soft_iface; |
| 301 | struct batadv_priv *bat_priv; |
| 302 | struct sk_buff *msg = NULL; |
| 303 | u32 test_length; |
| 304 | void *msg_head; |
| 305 | int ifindex; |
| 306 | u32 cookie; |
| 307 | u8 *dst; |
| 308 | int ret; |
| 309 | |
| 310 | if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) |
| 311 | return -EINVAL; |
| 312 | |
| 313 | if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) |
| 314 | return -EINVAL; |
| 315 | |
| 316 | if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]) |
| 317 | return -EINVAL; |
| 318 | |
| 319 | ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); |
| 320 | if (!ifindex) |
| 321 | return -EINVAL; |
| 322 | |
| 323 | dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); |
| 324 | |
| 325 | test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]); |
| 326 | |
| 327 | soft_iface = dev_get_by_index(net, ifindex); |
| 328 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { |
| 329 | ret = -ENODEV; |
| 330 | goto out; |
| 331 | } |
| 332 | |
| 333 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 334 | if (!msg) { |
| 335 | ret = -ENOMEM; |
| 336 | goto out; |
| 337 | } |
| 338 | |
| 339 | msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq, |
| 340 | &batadv_netlink_family, 0, |
| 341 | BATADV_CMD_TP_METER); |
| 342 | if (!msg_head) { |
| 343 | ret = -ENOBUFS; |
| 344 | goto out; |
| 345 | } |
| 346 | |
| 347 | bat_priv = netdev_priv(soft_iface); |
| 348 | batadv_tp_start(bat_priv, dst, test_length, &cookie); |
| 349 | |
| 350 | ret = batadv_netlink_tp_meter_put(msg, cookie); |
| 351 | |
| 352 | out: |
| 353 | if (soft_iface) |
| 354 | dev_put(soft_iface); |
| 355 | |
| 356 | if (ret) { |
| 357 | if (msg) |
| 358 | nlmsg_free(msg); |
| 359 | return ret; |
| 360 | } |
| 361 | |
| 362 | genlmsg_end(msg, msg_head); |
| 363 | return genlmsg_reply(msg, info); |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * batadv_netlink_tp_meter_start - Cancel a running tp_meter session |
| 368 | * @skb: received netlink message |
| 369 | * @info: receiver information |
| 370 | * |
| 371 | * Return: 0 on success, < 0 on error |
| 372 | */ |
| 373 | static int |
| 374 | batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info) |
| 375 | { |
| 376 | struct net *net = genl_info_net(info); |
| 377 | struct net_device *soft_iface; |
| 378 | struct batadv_priv *bat_priv; |
| 379 | int ifindex; |
| 380 | u8 *dst; |
| 381 | int ret = 0; |
| 382 | |
| 383 | if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) |
| 384 | return -EINVAL; |
| 385 | |
| 386 | if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) |
| 387 | return -EINVAL; |
| 388 | |
| 389 | ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); |
| 390 | if (!ifindex) |
| 391 | return -EINVAL; |
| 392 | |
| 393 | dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); |
| 394 | |
| 395 | soft_iface = dev_get_by_index(net, ifindex); |
| 396 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { |
| 397 | ret = -ENODEV; |
| 398 | goto out; |
| 399 | } |
| 400 | |
| 401 | bat_priv = netdev_priv(soft_iface); |
| 402 | batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL); |
| 403 | |
| 404 | out: |
| 405 | if (soft_iface) |
| 406 | dev_put(soft_iface); |
| 407 | |
| 408 | return ret; |
| 409 | } |
| 410 | |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 411 | /** |
| 412 | * batadv_netlink_dump_hardif_entry - Dump one hard interface into a message |
| 413 | * @msg: Netlink message to dump into |
| 414 | * @portid: Port making netlink request |
| 415 | * @seq: Sequence number of netlink message |
| 416 | * @hard_iface: Hard interface to dump |
| 417 | * |
| 418 | * Return: error code, or 0 on success |
| 419 | */ |
| 420 | static int |
| 421 | batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq, |
| 422 | struct batadv_hard_iface *hard_iface) |
| 423 | { |
| 424 | struct net_device *net_dev = hard_iface->net_dev; |
| 425 | void *hdr; |
| 426 | |
| 427 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, |
| 428 | BATADV_CMD_GET_HARDIFS); |
| 429 | if (!hdr) |
| 430 | return -EMSGSIZE; |
| 431 | |
| 432 | if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, |
| 433 | net_dev->ifindex) || |
| 434 | nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, |
| 435 | net_dev->name) || |
| 436 | nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, |
| 437 | net_dev->dev_addr)) |
| 438 | goto nla_put_failure; |
| 439 | |
| 440 | if (hard_iface->if_status == BATADV_IF_ACTIVE) { |
| 441 | if (nla_put_flag(msg, BATADV_ATTR_ACTIVE)) |
| 442 | goto nla_put_failure; |
| 443 | } |
| 444 | |
| 445 | genlmsg_end(msg, hdr); |
| 446 | return 0; |
| 447 | |
| 448 | nla_put_failure: |
| 449 | genlmsg_cancel(msg, hdr); |
| 450 | return -EMSGSIZE; |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * batadv_netlink_dump_hardifs - Dump all hard interface into a messages |
| 455 | * @msg: Netlink message to dump into |
| 456 | * @cb: Parameters from query |
| 457 | * |
| 458 | * Return: error code, or length of reply message on success |
| 459 | */ |
| 460 | static int |
| 461 | batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb) |
| 462 | { |
| 463 | struct net *net = sock_net(cb->skb->sk); |
| 464 | struct net_device *soft_iface; |
| 465 | struct batadv_hard_iface *hard_iface; |
| 466 | int ifindex; |
| 467 | int portid = NETLINK_CB(cb->skb).portid; |
| 468 | int seq = cb->nlh->nlmsg_seq; |
| 469 | int skip = cb->args[0]; |
| 470 | int i = 0; |
| 471 | |
| 472 | ifindex = batadv_netlink_get_ifindex(cb->nlh, |
| 473 | BATADV_ATTR_MESH_IFINDEX); |
| 474 | if (!ifindex) |
| 475 | return -EINVAL; |
| 476 | |
| 477 | soft_iface = dev_get_by_index(net, ifindex); |
| 478 | if (!soft_iface) |
| 479 | return -ENODEV; |
| 480 | |
| 481 | if (!batadv_softif_is_valid(soft_iface)) { |
| 482 | dev_put(soft_iface); |
| 483 | return -ENODEV; |
| 484 | } |
| 485 | |
| 486 | rcu_read_lock(); |
| 487 | |
| 488 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
| 489 | if (hard_iface->soft_iface != soft_iface) |
| 490 | continue; |
| 491 | |
| 492 | if (i++ < skip) |
| 493 | continue; |
| 494 | |
| 495 | if (batadv_netlink_dump_hardif_entry(msg, portid, seq, |
| 496 | hard_iface)) { |
| 497 | i--; |
| 498 | break; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | rcu_read_unlock(); |
| 503 | |
| 504 | dev_put(soft_iface); |
| 505 | |
| 506 | cb->args[0] = i; |
| 507 | |
| 508 | return msg->len; |
| 509 | } |
| 510 | |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 511 | static struct genl_ops batadv_netlink_ops[] = { |
Matthias Schiffer | 5da0aef | 2016-05-09 18:41:09 +0200 | [diff] [blame] | 512 | { |
| 513 | .cmd = BATADV_CMD_GET_MESH_INFO, |
| 514 | .flags = GENL_ADMIN_PERM, |
| 515 | .policy = batadv_netlink_policy, |
| 516 | .doit = batadv_netlink_get_mesh_info, |
| 517 | }, |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 518 | { |
| 519 | .cmd = BATADV_CMD_TP_METER, |
| 520 | .flags = GENL_ADMIN_PERM, |
| 521 | .policy = batadv_netlink_policy, |
| 522 | .doit = batadv_netlink_tp_meter_start, |
| 523 | }, |
| 524 | { |
| 525 | .cmd = BATADV_CMD_TP_METER_CANCEL, |
| 526 | .flags = GENL_ADMIN_PERM, |
| 527 | .policy = batadv_netlink_policy, |
| 528 | .doit = batadv_netlink_tp_meter_cancel, |
| 529 | }, |
Matthias Schiffer | 07a3061 | 2016-07-03 13:31:35 +0200 | [diff] [blame] | 530 | { |
| 531 | .cmd = BATADV_CMD_GET_ROUTING_ALGOS, |
| 532 | .flags = GENL_ADMIN_PERM, |
| 533 | .policy = batadv_netlink_policy, |
| 534 | .dumpit = batadv_algo_dump, |
| 535 | }, |
Matthias Schiffer | b60620c | 2016-07-03 13:31:36 +0200 | [diff] [blame] | 536 | { |
| 537 | .cmd = BATADV_CMD_GET_HARDIFS, |
| 538 | .flags = GENL_ADMIN_PERM, |
| 539 | .policy = batadv_netlink_policy, |
| 540 | .dumpit = batadv_netlink_dump_hardifs, |
| 541 | }, |
Matthias Schiffer | d34f055 | 2016-07-03 13:31:37 +0200 | [diff] [blame^] | 542 | { |
| 543 | .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, |
| 544 | .flags = GENL_ADMIN_PERM, |
| 545 | .policy = batadv_netlink_policy, |
| 546 | .dumpit = batadv_tt_local_dump, |
| 547 | }, |
| 548 | { |
| 549 | .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, |
| 550 | .flags = GENL_ADMIN_PERM, |
| 551 | .policy = batadv_netlink_policy, |
| 552 | .dumpit = batadv_tt_global_dump, |
| 553 | }, |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 554 | }; |
| 555 | |
| 556 | /** |
| 557 | * batadv_netlink_register - register batadv genl netlink family |
| 558 | */ |
| 559 | void __init batadv_netlink_register(void) |
| 560 | { |
| 561 | int ret; |
| 562 | |
Antonio Quartulli | 33a3bb4 | 2016-05-05 13:09:43 +0200 | [diff] [blame] | 563 | ret = genl_register_family_with_ops_groups(&batadv_netlink_family, |
| 564 | batadv_netlink_ops, |
| 565 | batadv_netlink_mcgrps); |
Matthias Schiffer | 09748a2 | 2016-05-09 18:41:08 +0200 | [diff] [blame] | 566 | if (ret) |
| 567 | pr_warn("unable to register netlink family"); |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * batadv_netlink_unregister - unregister batadv genl netlink family |
| 572 | */ |
| 573 | void batadv_netlink_unregister(void) |
| 574 | { |
| 575 | genl_unregister_family(&batadv_netlink_family); |
| 576 | } |