1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) B.A.T.M.A.N. contributors: 3 * 4 * Matthias Schiffer 5 */ 6 7 #include "netlink.h" 8 #include "main.h" 9 10 #include <linux/atomic.h> 11 #include <linux/bitops.h> 12 #include <linux/bug.h> 13 #include <linux/byteorder/generic.h> 14 #include <linux/cache.h> 15 #include <linux/err.h> 16 #include <linux/errno.h> 17 #include <linux/export.h> 18 #include <linux/genetlink.h> 19 #include <linux/gfp.h> 20 #include <linux/if_ether.h> 21 #include <linux/if_vlan.h> 22 #include <linux/init.h> 23 #include <linux/kernel.h> 24 #include <linux/limits.h> 25 #include <linux/list.h> 26 #include <linux/minmax.h> 27 #include <linux/netdevice.h> 28 #include <linux/netlink.h> 29 #include <linux/printk.h> 30 #include <linux/rtnetlink.h> 31 #include <linux/skbuff.h> 32 #include <linux/stddef.h> 33 #include <linux/types.h> 34 #include <net/genetlink.h> 35 #include <net/net_namespace.h> 36 #include <net/netlink.h> 37 #include <net/sock.h> 38 #include <uapi/linux/batadv_packet.h> 39 #include <uapi/linux/batman_adv.h> 40 41 #include "bat_algo.h" 42 #include "bridge_loop_avoidance.h" 43 #include "distributed-arp-table.h" 44 #include "gateway_client.h" 45 #include "gateway_common.h" 46 #include "hard-interface.h" 47 #include "log.h" 48 #include "multicast.h" 49 #include "network-coding.h" 50 #include "originator.h" 51 #include "soft-interface.h" 52 #include "tp_meter.h" 53 #include "translation-table.h" 54 55 struct genl_family batadv_netlink_family; 56 57 /* multicast groups */ 58 enum batadv_netlink_multicast_groups { 59 BATADV_NL_MCGRP_CONFIG, 60 BATADV_NL_MCGRP_TPMETER, 61 }; 62 63 /** 64 * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags 65 */ 66 enum batadv_genl_ops_flags { 67 /** 68 * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in 69 * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be 70 * saved in info->user_ptr[0] 71 */ 72 BATADV_FLAG_NEED_MESH = BIT(0), 73 74 /** 75 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in 76 * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be 77 * saved in info->user_ptr[1] 78 */ 79 BATADV_FLAG_NEED_HARDIF = BIT(1), 80 81 /** 82 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in 83 * attribute BATADV_ATTR_VLANID and expects a pointer to it to be 84 * saved in info->user_ptr[1] 85 */ 86 BATADV_FLAG_NEED_VLAN = BIT(2), 87 }; 88 89 static const struct genl_multicast_group batadv_netlink_mcgrps[] = { 90 [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG }, 91 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER }, 92 }; 93 94 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { 95 [BATADV_ATTR_VERSION] = { .type = NLA_STRING }, 96 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING }, 97 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 }, 98 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING }, 99 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN }, 100 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 }, 101 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING }, 102 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN }, 103 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN }, 104 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 }, 105 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 }, 106 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 }, 107 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 }, 108 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG }, 109 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN }, 110 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 }, 111 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 }, 112 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 }, 113 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 }, 114 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 }, 115 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG }, 116 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, 117 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN }, 118 [BATADV_ATTR_TQ] = { .type = NLA_U8 }, 119 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 }, 120 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 }, 121 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 }, 122 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN }, 123 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG }, 124 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN }, 125 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 }, 126 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN }, 127 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 }, 128 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 }, 129 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN }, 130 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 }, 131 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 }, 132 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 }, 133 [BATADV_ATTR_VLANID] = { .type = NLA_U16 }, 134 [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 }, 135 [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 }, 136 [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 }, 137 [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 }, 138 [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 }, 139 [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 }, 140 [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 }, 141 [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 }, 142 [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 }, 143 [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 }, 144 [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 }, 145 [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 }, 146 [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 }, 147 [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 }, 148 [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 }, 149 [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 }, 150 [BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 }, 151 [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 }, 152 [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 }, 153 [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 }, 154 }; 155 156 /** 157 * batadv_netlink_get_ifindex() - Extract an interface index from a message 158 * @nlh: Message header 159 * @attrtype: Attribute which holds an interface index 160 * 161 * Return: interface index, or 0. 162 */ 163 int 164 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) 165 { 166 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); 167 168 return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0; 169 } 170 171 /** 172 * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute 173 * @msg: Netlink message to dump into 174 * @bat_priv: the bat priv with all the soft interface information 175 * 176 * Return: 0 on success or negative error number in case of failure 177 */ 178 static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg, 179 struct batadv_priv *bat_priv) 180 { 181 struct batadv_softif_vlan *vlan; 182 u8 ap_isolation; 183 184 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); 185 if (!vlan) 186 return 0; 187 188 ap_isolation = atomic_read(&vlan->ap_isolation); 189 batadv_softif_vlan_put(vlan); 190 191 return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED, 192 !!ap_isolation); 193 } 194 195 /** 196 * batadv_netlink_set_mesh_ap_isolation() - Set ap_isolation from genl msg 197 * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute 198 * @bat_priv: the bat priv with all the soft interface information 199 * 200 * Return: 0 on success or negative error number in case of failure 201 */ 202 static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr, 203 struct batadv_priv *bat_priv) 204 { 205 struct batadv_softif_vlan *vlan; 206 207 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); 208 if (!vlan) 209 return -ENOENT; 210 211 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr)); 212 batadv_softif_vlan_put(vlan); 213 214 return 0; 215 } 216 217 /** 218 * batadv_netlink_mesh_fill() - Fill message with mesh attributes 219 * @msg: Netlink message to dump into 220 * @bat_priv: the bat priv with all the soft interface information 221 * @cmd: type of message to generate 222 * @portid: Port making netlink request 223 * @seq: sequence number for message 224 * @flags: Additional flags for message 225 * 226 * Return: 0 on success or negative error number in case of failure 227 */ 228 static int batadv_netlink_mesh_fill(struct sk_buff *msg, 229 struct batadv_priv *bat_priv, 230 enum batadv_nl_commands cmd, 231 u32 portid, u32 seq, int flags) 232 { 233 struct net_device *soft_iface = bat_priv->soft_iface; 234 struct batadv_hard_iface *primary_if = NULL; 235 struct net_device *hard_iface; 236 void *hdr; 237 238 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 239 if (!hdr) 240 return -ENOBUFS; 241 242 if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) || 243 nla_put_string(msg, BATADV_ATTR_ALGO_NAME, 244 bat_priv->algo_ops->name) || 245 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) || 246 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) || 247 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN, 248 soft_iface->dev_addr) || 249 nla_put_u8(msg, BATADV_ATTR_TT_TTVN, 250 (u8)atomic_read(&bat_priv->tt.vn))) 251 goto nla_put_failure; 252 253 #ifdef CONFIG_BATMAN_ADV_BLA 254 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC, 255 ntohs(bat_priv->bla.claim_dest.group))) 256 goto nla_put_failure; 257 #endif 258 259 if (batadv_mcast_mesh_info_put(msg, bat_priv)) 260 goto nla_put_failure; 261 262 primary_if = batadv_primary_if_get_selected(bat_priv); 263 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) { 264 hard_iface = primary_if->net_dev; 265 266 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, 267 hard_iface->ifindex) || 268 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, 269 hard_iface->name) || 270 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, 271 hard_iface->dev_addr)) 272 goto nla_put_failure; 273 } 274 275 if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED, 276 !!atomic_read(&bat_priv->aggregated_ogms))) 277 goto nla_put_failure; 278 279 if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv)) 280 goto nla_put_failure; 281 282 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK, 283 bat_priv->isolation_mark)) 284 goto nla_put_failure; 285 286 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK, 287 bat_priv->isolation_mark_mask)) 288 goto nla_put_failure; 289 290 if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED, 291 !!atomic_read(&bat_priv->bonding))) 292 goto nla_put_failure; 293 294 #ifdef CONFIG_BATMAN_ADV_BLA 295 if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED, 296 !!atomic_read(&bat_priv->bridge_loop_avoidance))) 297 goto nla_put_failure; 298 #endif /* CONFIG_BATMAN_ADV_BLA */ 299 300 #ifdef CONFIG_BATMAN_ADV_DAT 301 if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED, 302 !!atomic_read(&bat_priv->distributed_arp_table))) 303 goto nla_put_failure; 304 #endif /* CONFIG_BATMAN_ADV_DAT */ 305 306 if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED, 307 !!atomic_read(&bat_priv->fragmentation))) 308 goto nla_put_failure; 309 310 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN, 311 atomic_read(&bat_priv->gw.bandwidth_down))) 312 goto nla_put_failure; 313 314 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP, 315 atomic_read(&bat_priv->gw.bandwidth_up))) 316 goto nla_put_failure; 317 318 if (nla_put_u8(msg, BATADV_ATTR_GW_MODE, 319 atomic_read(&bat_priv->gw.mode))) 320 goto nla_put_failure; 321 322 if (bat_priv->algo_ops->gw.get_best_gw_node && 323 bat_priv->algo_ops->gw.is_eligible) { 324 /* GW selection class is not available if the routing algorithm 325 * in use does not implement the GW API 326 */ 327 if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS, 328 atomic_read(&bat_priv->gw.sel_class))) 329 goto nla_put_failure; 330 } 331 332 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY, 333 atomic_read(&bat_priv->hop_penalty))) 334 goto nla_put_failure; 335 336 #ifdef CONFIG_BATMAN_ADV_DEBUG 337 if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL, 338 atomic_read(&bat_priv->log_level))) 339 goto nla_put_failure; 340 #endif /* CONFIG_BATMAN_ADV_DEBUG */ 341 342 #ifdef CONFIG_BATMAN_ADV_MCAST 343 if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED, 344 !atomic_read(&bat_priv->multicast_mode))) 345 goto nla_put_failure; 346 347 if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT, 348 atomic_read(&bat_priv->multicast_fanout))) 349 goto nla_put_failure; 350 #endif /* CONFIG_BATMAN_ADV_MCAST */ 351 352 #ifdef CONFIG_BATMAN_ADV_NC 353 if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED, 354 !!atomic_read(&bat_priv->network_coding))) 355 goto nla_put_failure; 356 #endif /* CONFIG_BATMAN_ADV_NC */ 357 358 if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL, 359 atomic_read(&bat_priv->orig_interval))) 360 goto nla_put_failure; 361 362 if (primary_if) 363 batadv_hardif_put(primary_if); 364 365 genlmsg_end(msg, hdr); 366 return 0; 367 368 nla_put_failure: 369 if (primary_if) 370 batadv_hardif_put(primary_if); 371 372 genlmsg_cancel(msg, hdr); 373 return -EMSGSIZE; 374 } 375 376 /** 377 * batadv_netlink_notify_mesh() - send softif attributes to listener 378 * @bat_priv: the bat priv with all the soft interface information 379 * 380 * Return: 0 on success, < 0 on error 381 */ 382 int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv) 383 { 384 struct sk_buff *msg; 385 int ret; 386 387 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 388 if (!msg) 389 return -ENOMEM; 390 391 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH, 392 0, 0, 0); 393 if (ret < 0) { 394 nlmsg_free(msg); 395 return ret; 396 } 397 398 genlmsg_multicast_netns(&batadv_netlink_family, 399 dev_net(bat_priv->soft_iface), msg, 0, 400 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 401 402 return 0; 403 } 404 405 /** 406 * batadv_netlink_get_mesh() - Get softif attributes 407 * @skb: Netlink message with request data 408 * @info: receiver information 409 * 410 * Return: 0 on success or negative error number in case of failure 411 */ 412 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info) 413 { 414 struct batadv_priv *bat_priv = info->user_ptr[0]; 415 struct sk_buff *msg; 416 int ret; 417 418 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 419 if (!msg) 420 return -ENOMEM; 421 422 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH, 423 info->snd_portid, info->snd_seq, 0); 424 if (ret < 0) { 425 nlmsg_free(msg); 426 return ret; 427 } 428 429 ret = genlmsg_reply(msg, info); 430 431 return ret; 432 } 433 434 /** 435 * batadv_netlink_set_mesh() - Set softif attributes 436 * @skb: Netlink message with request data 437 * @info: receiver information 438 * 439 * Return: 0 on success or negative error number in case of failure 440 */ 441 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info) 442 { 443 struct batadv_priv *bat_priv = info->user_ptr[0]; 444 struct nlattr *attr; 445 446 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) { 447 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]; 448 449 atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr)); 450 } 451 452 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 453 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 454 455 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv); 456 } 457 458 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) { 459 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK]; 460 461 bat_priv->isolation_mark = nla_get_u32(attr); 462 } 463 464 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) { 465 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK]; 466 467 bat_priv->isolation_mark_mask = nla_get_u32(attr); 468 } 469 470 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) { 471 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED]; 472 473 atomic_set(&bat_priv->bonding, !!nla_get_u8(attr)); 474 } 475 476 #ifdef CONFIG_BATMAN_ADV_BLA 477 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) { 478 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]; 479 480 atomic_set(&bat_priv->bridge_loop_avoidance, 481 !!nla_get_u8(attr)); 482 batadv_bla_status_update(bat_priv->soft_iface); 483 } 484 #endif /* CONFIG_BATMAN_ADV_BLA */ 485 486 #ifdef CONFIG_BATMAN_ADV_DAT 487 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) { 488 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]; 489 490 atomic_set(&bat_priv->distributed_arp_table, 491 !!nla_get_u8(attr)); 492 batadv_dat_status_update(bat_priv->soft_iface); 493 } 494 #endif /* CONFIG_BATMAN_ADV_DAT */ 495 496 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) { 497 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]; 498 499 atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr)); 500 batadv_update_min_mtu(bat_priv->soft_iface); 501 } 502 503 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) { 504 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]; 505 506 atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr)); 507 batadv_gw_tvlv_container_update(bat_priv); 508 } 509 510 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) { 511 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]; 512 513 atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr)); 514 batadv_gw_tvlv_container_update(bat_priv); 515 } 516 517 if (info->attrs[BATADV_ATTR_GW_MODE]) { 518 u8 gw_mode; 519 520 attr = info->attrs[BATADV_ATTR_GW_MODE]; 521 gw_mode = nla_get_u8(attr); 522 523 if (gw_mode <= BATADV_GW_MODE_SERVER) { 524 /* Invoking batadv_gw_reselect() is not enough to really 525 * de-select the current GW. It will only instruct the 526 * gateway client code to perform a re-election the next 527 * time that this is needed. 528 * 529 * When gw client mode is being switched off the current 530 * GW must be de-selected explicitly otherwise no GW_ADD 531 * uevent is thrown on client mode re-activation. This 532 * is operation is performed in 533 * batadv_gw_check_client_stop(). 534 */ 535 batadv_gw_reselect(bat_priv); 536 537 /* always call batadv_gw_check_client_stop() before 538 * changing the gateway state 539 */ 540 batadv_gw_check_client_stop(bat_priv); 541 atomic_set(&bat_priv->gw.mode, gw_mode); 542 batadv_gw_tvlv_container_update(bat_priv); 543 } 544 } 545 546 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] && 547 bat_priv->algo_ops->gw.get_best_gw_node && 548 bat_priv->algo_ops->gw.is_eligible) { 549 /* setting the GW selection class is allowed only if the routing 550 * algorithm in use implements the GW API 551 */ 552 553 u32 sel_class_max = 0xffffffffu; 554 u32 sel_class; 555 556 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS]; 557 sel_class = nla_get_u32(attr); 558 559 if (!bat_priv->algo_ops->gw.store_sel_class) 560 sel_class_max = BATADV_TQ_MAX_VALUE; 561 562 if (sel_class >= 1 && sel_class <= sel_class_max) { 563 atomic_set(&bat_priv->gw.sel_class, sel_class); 564 batadv_gw_reselect(bat_priv); 565 } 566 } 567 568 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 569 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 570 571 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr)); 572 } 573 574 #ifdef CONFIG_BATMAN_ADV_DEBUG 575 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) { 576 attr = info->attrs[BATADV_ATTR_LOG_LEVEL]; 577 578 atomic_set(&bat_priv->log_level, 579 nla_get_u32(attr) & BATADV_DBG_ALL); 580 } 581 #endif /* CONFIG_BATMAN_ADV_DEBUG */ 582 583 #ifdef CONFIG_BATMAN_ADV_MCAST 584 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) { 585 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]; 586 587 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr)); 588 } 589 590 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) { 591 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT]; 592 593 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr)); 594 } 595 #endif /* CONFIG_BATMAN_ADV_MCAST */ 596 597 #ifdef CONFIG_BATMAN_ADV_NC 598 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) { 599 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]; 600 601 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr)); 602 batadv_nc_status_update(bat_priv->soft_iface); 603 } 604 #endif /* CONFIG_BATMAN_ADV_NC */ 605 606 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) { 607 u32 orig_interval; 608 609 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL]; 610 orig_interval = nla_get_u32(attr); 611 612 orig_interval = min_t(u32, orig_interval, INT_MAX); 613 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER); 614 615 atomic_set(&bat_priv->orig_interval, orig_interval); 616 } 617 618 batadv_netlink_notify_mesh(bat_priv); 619 620 return 0; 621 } 622 623 /** 624 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session 625 * @msg: netlink message to be sent back 626 * @cookie: tp meter session cookie 627 * 628 * Return: 0 on success, < 0 on error 629 */ 630 static int 631 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie) 632 { 633 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 634 return -ENOBUFS; 635 636 return 0; 637 } 638 639 /** 640 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client 641 * @bat_priv: the bat priv with all the soft interface information 642 * @dst: destination of tp_meter session 643 * @result: reason for tp meter session stop 644 * @test_time: total time of the tp_meter session 645 * @total_bytes: bytes acked to the receiver 646 * @cookie: cookie of tp_meter session 647 * 648 * Return: 0 on success, < 0 on error 649 */ 650 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, 651 u8 result, u32 test_time, u64 total_bytes, 652 u32 cookie) 653 { 654 struct sk_buff *msg; 655 void *hdr; 656 int ret; 657 658 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 659 if (!msg) 660 return -ENOMEM; 661 662 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0, 663 BATADV_CMD_TP_METER); 664 if (!hdr) { 665 ret = -ENOBUFS; 666 goto err_genlmsg; 667 } 668 669 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 670 goto nla_put_failure; 671 672 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time)) 673 goto nla_put_failure; 674 675 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes, 676 BATADV_ATTR_PAD)) 677 goto nla_put_failure; 678 679 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result)) 680 goto nla_put_failure; 681 682 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst)) 683 goto nla_put_failure; 684 685 genlmsg_end(msg, hdr); 686 687 genlmsg_multicast_netns(&batadv_netlink_family, 688 dev_net(bat_priv->soft_iface), msg, 0, 689 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL); 690 691 return 0; 692 693 nla_put_failure: 694 genlmsg_cancel(msg, hdr); 695 ret = -EMSGSIZE; 696 697 err_genlmsg: 698 nlmsg_free(msg); 699 return ret; 700 } 701 702 /** 703 * batadv_netlink_tp_meter_start() - Start a new tp_meter session 704 * @skb: received netlink message 705 * @info: receiver information 706 * 707 * Return: 0 on success, < 0 on error 708 */ 709 static int 710 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info) 711 { 712 struct batadv_priv *bat_priv = info->user_ptr[0]; 713 struct sk_buff *msg = NULL; 714 u32 test_length; 715 void *msg_head; 716 u32 cookie; 717 u8 *dst; 718 int ret; 719 720 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 721 return -EINVAL; 722 723 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]) 724 return -EINVAL; 725 726 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 727 728 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]); 729 730 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 731 if (!msg) { 732 ret = -ENOMEM; 733 goto out; 734 } 735 736 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq, 737 &batadv_netlink_family, 0, 738 BATADV_CMD_TP_METER); 739 if (!msg_head) { 740 ret = -ENOBUFS; 741 goto out; 742 } 743 744 batadv_tp_start(bat_priv, dst, test_length, &cookie); 745 746 ret = batadv_netlink_tp_meter_put(msg, cookie); 747 748 out: 749 if (ret) { 750 if (msg) 751 nlmsg_free(msg); 752 return ret; 753 } 754 755 genlmsg_end(msg, msg_head); 756 return genlmsg_reply(msg, info); 757 } 758 759 /** 760 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session 761 * @skb: received netlink message 762 * @info: receiver information 763 * 764 * Return: 0 on success, < 0 on error 765 */ 766 static int 767 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info) 768 { 769 struct batadv_priv *bat_priv = info->user_ptr[0]; 770 u8 *dst; 771 int ret = 0; 772 773 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 774 return -EINVAL; 775 776 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 777 778 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL); 779 780 return ret; 781 } 782 783 /** 784 * batadv_netlink_hardif_fill() - Fill message with hardif attributes 785 * @msg: Netlink message to dump into 786 * @bat_priv: the bat priv with all the soft interface information 787 * @hard_iface: hard interface which was modified 788 * @cmd: type of message to generate 789 * @portid: Port making netlink request 790 * @seq: sequence number for message 791 * @flags: Additional flags for message 792 * @cb: Control block containing additional options 793 * 794 * Return: 0 on success or negative error number in case of failure 795 */ 796 static int batadv_netlink_hardif_fill(struct sk_buff *msg, 797 struct batadv_priv *bat_priv, 798 struct batadv_hard_iface *hard_iface, 799 enum batadv_nl_commands cmd, 800 u32 portid, u32 seq, int flags, 801 struct netlink_callback *cb) 802 { 803 struct net_device *net_dev = hard_iface->net_dev; 804 void *hdr; 805 806 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 807 if (!hdr) 808 return -ENOBUFS; 809 810 if (cb) 811 genl_dump_check_consistent(cb, hdr); 812 813 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 814 bat_priv->soft_iface->ifindex)) 815 goto nla_put_failure; 816 817 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, 818 bat_priv->soft_iface->name)) 819 goto nla_put_failure; 820 821 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, 822 net_dev->ifindex) || 823 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, 824 net_dev->name) || 825 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, 826 net_dev->dev_addr)) 827 goto nla_put_failure; 828 829 if (hard_iface->if_status == BATADV_IF_ACTIVE) { 830 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE)) 831 goto nla_put_failure; 832 } 833 834 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY, 835 atomic_read(&hard_iface->hop_penalty))) 836 goto nla_put_failure; 837 838 #ifdef CONFIG_BATMAN_ADV_BATMAN_V 839 if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL, 840 atomic_read(&hard_iface->bat_v.elp_interval))) 841 goto nla_put_failure; 842 843 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE, 844 atomic_read(&hard_iface->bat_v.throughput_override))) 845 goto nla_put_failure; 846 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */ 847 848 genlmsg_end(msg, hdr); 849 return 0; 850 851 nla_put_failure: 852 genlmsg_cancel(msg, hdr); 853 return -EMSGSIZE; 854 } 855 856 /** 857 * batadv_netlink_notify_hardif() - send hardif attributes to listener 858 * @bat_priv: the bat priv with all the soft interface information 859 * @hard_iface: hard interface which was modified 860 * 861 * Return: 0 on success, < 0 on error 862 */ 863 int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv, 864 struct batadv_hard_iface *hard_iface) 865 { 866 struct sk_buff *msg; 867 int ret; 868 869 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 870 if (!msg) 871 return -ENOMEM; 872 873 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 874 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL); 875 if (ret < 0) { 876 nlmsg_free(msg); 877 return ret; 878 } 879 880 genlmsg_multicast_netns(&batadv_netlink_family, 881 dev_net(bat_priv->soft_iface), msg, 0, 882 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 883 884 return 0; 885 } 886 887 /** 888 * batadv_netlink_get_hardif() - Get hardif attributes 889 * @skb: Netlink message with request data 890 * @info: receiver information 891 * 892 * Return: 0 on success or negative error number in case of failure 893 */ 894 static int batadv_netlink_get_hardif(struct sk_buff *skb, 895 struct genl_info *info) 896 { 897 struct batadv_hard_iface *hard_iface = info->user_ptr[1]; 898 struct batadv_priv *bat_priv = info->user_ptr[0]; 899 struct sk_buff *msg; 900 int ret; 901 902 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 903 if (!msg) 904 return -ENOMEM; 905 906 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 907 BATADV_CMD_GET_HARDIF, 908 info->snd_portid, info->snd_seq, 0, 909 NULL); 910 if (ret < 0) { 911 nlmsg_free(msg); 912 return ret; 913 } 914 915 ret = genlmsg_reply(msg, info); 916 917 return ret; 918 } 919 920 /** 921 * batadv_netlink_set_hardif() - Set hardif attributes 922 * @skb: Netlink message with request data 923 * @info: receiver information 924 * 925 * Return: 0 on success or negative error number in case of failure 926 */ 927 static int batadv_netlink_set_hardif(struct sk_buff *skb, 928 struct genl_info *info) 929 { 930 struct batadv_hard_iface *hard_iface = info->user_ptr[1]; 931 struct batadv_priv *bat_priv = info->user_ptr[0]; 932 struct nlattr *attr; 933 934 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 935 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 936 937 atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr)); 938 } 939 940 #ifdef CONFIG_BATMAN_ADV_BATMAN_V 941 942 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) { 943 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL]; 944 945 atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr)); 946 } 947 948 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) { 949 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]; 950 951 atomic_set(&hard_iface->bat_v.throughput_override, 952 nla_get_u32(attr)); 953 } 954 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */ 955 956 batadv_netlink_notify_hardif(bat_priv, hard_iface); 957 958 return 0; 959 } 960 961 /** 962 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages 963 * @msg: Netlink message to dump into 964 * @cb: Parameters from query 965 * 966 * Return: error code, or length of reply message on success 967 */ 968 static int 969 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb) 970 { 971 struct net *net = sock_net(cb->skb->sk); 972 struct net_device *soft_iface; 973 struct batadv_hard_iface *hard_iface; 974 struct batadv_priv *bat_priv; 975 int ifindex; 976 int portid = NETLINK_CB(cb->skb).portid; 977 int skip = cb->args[0]; 978 int i = 0; 979 980 ifindex = batadv_netlink_get_ifindex(cb->nlh, 981 BATADV_ATTR_MESH_IFINDEX); 982 if (!ifindex) 983 return -EINVAL; 984 985 soft_iface = dev_get_by_index(net, ifindex); 986 if (!soft_iface) 987 return -ENODEV; 988 989 if (!batadv_softif_is_valid(soft_iface)) { 990 dev_put(soft_iface); 991 return -ENODEV; 992 } 993 994 bat_priv = netdev_priv(soft_iface); 995 996 rtnl_lock(); 997 cb->seq = batadv_hardif_generation << 1 | 1; 998 999 list_for_each_entry(hard_iface, &batadv_hardif_list, list) { 1000 if (hard_iface->soft_iface != soft_iface) 1001 continue; 1002 1003 if (i++ < skip) 1004 continue; 1005 1006 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 1007 BATADV_CMD_GET_HARDIF, 1008 portid, cb->nlh->nlmsg_seq, 1009 NLM_F_MULTI, cb)) { 1010 i--; 1011 break; 1012 } 1013 } 1014 1015 rtnl_unlock(); 1016 1017 dev_put(soft_iface); 1018 1019 cb->args[0] = i; 1020 1021 return msg->len; 1022 } 1023 1024 /** 1025 * batadv_netlink_vlan_fill() - Fill message with vlan attributes 1026 * @msg: Netlink message to dump into 1027 * @bat_priv: the bat priv with all the soft interface information 1028 * @vlan: vlan which was modified 1029 * @cmd: type of message to generate 1030 * @portid: Port making netlink request 1031 * @seq: sequence number for message 1032 * @flags: Additional flags for message 1033 * 1034 * Return: 0 on success or negative error number in case of failure 1035 */ 1036 static int batadv_netlink_vlan_fill(struct sk_buff *msg, 1037 struct batadv_priv *bat_priv, 1038 struct batadv_softif_vlan *vlan, 1039 enum batadv_nl_commands cmd, 1040 u32 portid, u32 seq, int flags) 1041 { 1042 void *hdr; 1043 1044 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 1045 if (!hdr) 1046 return -ENOBUFS; 1047 1048 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 1049 bat_priv->soft_iface->ifindex)) 1050 goto nla_put_failure; 1051 1052 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, 1053 bat_priv->soft_iface->name)) 1054 goto nla_put_failure; 1055 1056 if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK)) 1057 goto nla_put_failure; 1058 1059 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED, 1060 !!atomic_read(&vlan->ap_isolation))) 1061 goto nla_put_failure; 1062 1063 genlmsg_end(msg, hdr); 1064 return 0; 1065 1066 nla_put_failure: 1067 genlmsg_cancel(msg, hdr); 1068 return -EMSGSIZE; 1069 } 1070 1071 /** 1072 * batadv_netlink_notify_vlan() - send vlan attributes to listener 1073 * @bat_priv: the bat priv with all the soft interface information 1074 * @vlan: vlan which was modified 1075 * 1076 * Return: 0 on success, < 0 on error 1077 */ 1078 int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv, 1079 struct batadv_softif_vlan *vlan) 1080 { 1081 struct sk_buff *msg; 1082 int ret; 1083 1084 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1085 if (!msg) 1086 return -ENOMEM; 1087 1088 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, 1089 BATADV_CMD_SET_VLAN, 0, 0, 0); 1090 if (ret < 0) { 1091 nlmsg_free(msg); 1092 return ret; 1093 } 1094 1095 genlmsg_multicast_netns(&batadv_netlink_family, 1096 dev_net(bat_priv->soft_iface), msg, 0, 1097 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 1098 1099 return 0; 1100 } 1101 1102 /** 1103 * batadv_netlink_get_vlan() - Get vlan attributes 1104 * @skb: Netlink message with request data 1105 * @info: receiver information 1106 * 1107 * Return: 0 on success or negative error number in case of failure 1108 */ 1109 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info) 1110 { 1111 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1112 struct batadv_priv *bat_priv = info->user_ptr[0]; 1113 struct sk_buff *msg; 1114 int ret; 1115 1116 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1117 if (!msg) 1118 return -ENOMEM; 1119 1120 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN, 1121 info->snd_portid, info->snd_seq, 0); 1122 if (ret < 0) { 1123 nlmsg_free(msg); 1124 return ret; 1125 } 1126 1127 ret = genlmsg_reply(msg, info); 1128 1129 return ret; 1130 } 1131 1132 /** 1133 * batadv_netlink_set_vlan() - Get vlan attributes 1134 * @skb: Netlink message with request data 1135 * @info: receiver information 1136 * 1137 * Return: 0 on success or negative error number in case of failure 1138 */ 1139 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info) 1140 { 1141 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1142 struct batadv_priv *bat_priv = info->user_ptr[0]; 1143 struct nlattr *attr; 1144 1145 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 1146 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 1147 1148 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr)); 1149 } 1150 1151 batadv_netlink_notify_vlan(bat_priv, vlan); 1152 1153 return 0; 1154 } 1155 1156 /** 1157 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes 1158 * @net: the applicable net namespace 1159 * @info: receiver information 1160 * 1161 * Return: Pointer to soft interface (with increased refcnt) on success, error 1162 * pointer on error 1163 */ 1164 static struct net_device * 1165 batadv_get_softif_from_info(struct net *net, struct genl_info *info) 1166 { 1167 struct net_device *soft_iface; 1168 int ifindex; 1169 1170 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) 1171 return ERR_PTR(-EINVAL); 1172 1173 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); 1174 1175 soft_iface = dev_get_by_index(net, ifindex); 1176 if (!soft_iface) 1177 return ERR_PTR(-ENODEV); 1178 1179 if (!batadv_softif_is_valid(soft_iface)) 1180 goto err_put_softif; 1181 1182 return soft_iface; 1183 1184 err_put_softif: 1185 dev_put(soft_iface); 1186 1187 return ERR_PTR(-EINVAL); 1188 } 1189 1190 /** 1191 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes 1192 * @bat_priv: the bat priv with all the soft interface information 1193 * @net: the applicable net namespace 1194 * @info: receiver information 1195 * 1196 * Return: Pointer to hard interface (with increased refcnt) on success, error 1197 * pointer on error 1198 */ 1199 static struct batadv_hard_iface * 1200 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net, 1201 struct genl_info *info) 1202 { 1203 struct batadv_hard_iface *hard_iface; 1204 struct net_device *hard_dev; 1205 unsigned int hardif_index; 1206 1207 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX]) 1208 return ERR_PTR(-EINVAL); 1209 1210 hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]); 1211 1212 hard_dev = dev_get_by_index(net, hardif_index); 1213 if (!hard_dev) 1214 return ERR_PTR(-ENODEV); 1215 1216 hard_iface = batadv_hardif_get_by_netdev(hard_dev); 1217 if (!hard_iface) 1218 goto err_put_harddev; 1219 1220 if (hard_iface->soft_iface != bat_priv->soft_iface) 1221 goto err_put_hardif; 1222 1223 /* hard_dev is referenced by hard_iface and not needed here */ 1224 dev_put(hard_dev); 1225 1226 return hard_iface; 1227 1228 err_put_hardif: 1229 batadv_hardif_put(hard_iface); 1230 err_put_harddev: 1231 dev_put(hard_dev); 1232 1233 return ERR_PTR(-EINVAL); 1234 } 1235 1236 /** 1237 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes 1238 * @bat_priv: the bat priv with all the soft interface information 1239 * @net: the applicable net namespace 1240 * @info: receiver information 1241 * 1242 * Return: Pointer to vlan on success (with increased refcnt), error pointer 1243 * on error 1244 */ 1245 static struct batadv_softif_vlan * 1246 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net, 1247 struct genl_info *info) 1248 { 1249 struct batadv_softif_vlan *vlan; 1250 u16 vid; 1251 1252 if (!info->attrs[BATADV_ATTR_VLANID]) 1253 return ERR_PTR(-EINVAL); 1254 1255 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]); 1256 1257 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); 1258 if (!vlan) 1259 return ERR_PTR(-ENOENT); 1260 1261 return vlan; 1262 } 1263 1264 /** 1265 * batadv_pre_doit() - Prepare batman-adv genl doit request 1266 * @ops: requested netlink operation 1267 * @skb: Netlink message with request data 1268 * @info: receiver information 1269 * 1270 * Return: 0 on success or negative error number in case of failure 1271 */ 1272 static int batadv_pre_doit(const struct genl_ops *ops, struct sk_buff *skb, 1273 struct genl_info *info) 1274 { 1275 struct net *net = genl_info_net(info); 1276 struct batadv_hard_iface *hard_iface; 1277 struct batadv_priv *bat_priv = NULL; 1278 struct batadv_softif_vlan *vlan; 1279 struct net_device *soft_iface; 1280 u8 user_ptr1_flags; 1281 u8 mesh_dep_flags; 1282 int ret; 1283 1284 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1285 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1)) 1286 return -EINVAL; 1287 1288 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1289 if (WARN_ON((ops->internal_flags & mesh_dep_flags) && 1290 (~ops->internal_flags & BATADV_FLAG_NEED_MESH))) 1291 return -EINVAL; 1292 1293 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) { 1294 soft_iface = batadv_get_softif_from_info(net, info); 1295 if (IS_ERR(soft_iface)) 1296 return PTR_ERR(soft_iface); 1297 1298 bat_priv = netdev_priv(soft_iface); 1299 info->user_ptr[0] = bat_priv; 1300 } 1301 1302 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) { 1303 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info); 1304 if (IS_ERR(hard_iface)) { 1305 ret = PTR_ERR(hard_iface); 1306 goto err_put_softif; 1307 } 1308 1309 info->user_ptr[1] = hard_iface; 1310 } 1311 1312 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) { 1313 vlan = batadv_get_vlan_from_info(bat_priv, net, info); 1314 if (IS_ERR(vlan)) { 1315 ret = PTR_ERR(vlan); 1316 goto err_put_softif; 1317 } 1318 1319 info->user_ptr[1] = vlan; 1320 } 1321 1322 return 0; 1323 1324 err_put_softif: 1325 if (bat_priv) 1326 dev_put(bat_priv->soft_iface); 1327 1328 return ret; 1329 } 1330 1331 /** 1332 * batadv_post_doit() - End batman-adv genl doit request 1333 * @ops: requested netlink operation 1334 * @skb: Netlink message with request data 1335 * @info: receiver information 1336 */ 1337 static void batadv_post_doit(const struct genl_ops *ops, struct sk_buff *skb, 1338 struct genl_info *info) 1339 { 1340 struct batadv_hard_iface *hard_iface; 1341 struct batadv_softif_vlan *vlan; 1342 struct batadv_priv *bat_priv; 1343 1344 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF && 1345 info->user_ptr[1]) { 1346 hard_iface = info->user_ptr[1]; 1347 1348 batadv_hardif_put(hard_iface); 1349 } 1350 1351 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) { 1352 vlan = info->user_ptr[1]; 1353 batadv_softif_vlan_put(vlan); 1354 } 1355 1356 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) { 1357 bat_priv = info->user_ptr[0]; 1358 dev_put(bat_priv->soft_iface); 1359 } 1360 } 1361 1362 static const struct genl_small_ops batadv_netlink_ops[] = { 1363 { 1364 .cmd = BATADV_CMD_GET_MESH, 1365 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1366 /* can be retrieved by unprivileged users */ 1367 .doit = batadv_netlink_get_mesh, 1368 .internal_flags = BATADV_FLAG_NEED_MESH, 1369 }, 1370 { 1371 .cmd = BATADV_CMD_TP_METER, 1372 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1373 .flags = GENL_ADMIN_PERM, 1374 .doit = batadv_netlink_tp_meter_start, 1375 .internal_flags = BATADV_FLAG_NEED_MESH, 1376 }, 1377 { 1378 .cmd = BATADV_CMD_TP_METER_CANCEL, 1379 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1380 .flags = GENL_ADMIN_PERM, 1381 .doit = batadv_netlink_tp_meter_cancel, 1382 .internal_flags = BATADV_FLAG_NEED_MESH, 1383 }, 1384 { 1385 .cmd = BATADV_CMD_GET_ROUTING_ALGOS, 1386 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1387 .flags = GENL_ADMIN_PERM, 1388 .dumpit = batadv_algo_dump, 1389 }, 1390 { 1391 .cmd = BATADV_CMD_GET_HARDIF, 1392 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1393 /* can be retrieved by unprivileged users */ 1394 .dumpit = batadv_netlink_dump_hardif, 1395 .doit = batadv_netlink_get_hardif, 1396 .internal_flags = BATADV_FLAG_NEED_MESH | 1397 BATADV_FLAG_NEED_HARDIF, 1398 }, 1399 { 1400 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, 1401 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1402 .flags = GENL_ADMIN_PERM, 1403 .dumpit = batadv_tt_local_dump, 1404 }, 1405 { 1406 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, 1407 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1408 .flags = GENL_ADMIN_PERM, 1409 .dumpit = batadv_tt_global_dump, 1410 }, 1411 { 1412 .cmd = BATADV_CMD_GET_ORIGINATORS, 1413 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1414 .flags = GENL_ADMIN_PERM, 1415 .dumpit = batadv_orig_dump, 1416 }, 1417 { 1418 .cmd = BATADV_CMD_GET_NEIGHBORS, 1419 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1420 .flags = GENL_ADMIN_PERM, 1421 .dumpit = batadv_hardif_neigh_dump, 1422 }, 1423 { 1424 .cmd = BATADV_CMD_GET_GATEWAYS, 1425 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1426 .flags = GENL_ADMIN_PERM, 1427 .dumpit = batadv_gw_dump, 1428 }, 1429 { 1430 .cmd = BATADV_CMD_GET_BLA_CLAIM, 1431 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1432 .flags = GENL_ADMIN_PERM, 1433 .dumpit = batadv_bla_claim_dump, 1434 }, 1435 { 1436 .cmd = BATADV_CMD_GET_BLA_BACKBONE, 1437 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1438 .flags = GENL_ADMIN_PERM, 1439 .dumpit = batadv_bla_backbone_dump, 1440 }, 1441 { 1442 .cmd = BATADV_CMD_GET_DAT_CACHE, 1443 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1444 .flags = GENL_ADMIN_PERM, 1445 .dumpit = batadv_dat_cache_dump, 1446 }, 1447 { 1448 .cmd = BATADV_CMD_GET_MCAST_FLAGS, 1449 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1450 .flags = GENL_ADMIN_PERM, 1451 .dumpit = batadv_mcast_flags_dump, 1452 }, 1453 { 1454 .cmd = BATADV_CMD_SET_MESH, 1455 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1456 .flags = GENL_ADMIN_PERM, 1457 .doit = batadv_netlink_set_mesh, 1458 .internal_flags = BATADV_FLAG_NEED_MESH, 1459 }, 1460 { 1461 .cmd = BATADV_CMD_SET_HARDIF, 1462 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1463 .flags = GENL_ADMIN_PERM, 1464 .doit = batadv_netlink_set_hardif, 1465 .internal_flags = BATADV_FLAG_NEED_MESH | 1466 BATADV_FLAG_NEED_HARDIF, 1467 }, 1468 { 1469 .cmd = BATADV_CMD_GET_VLAN, 1470 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1471 /* can be retrieved by unprivileged users */ 1472 .doit = batadv_netlink_get_vlan, 1473 .internal_flags = BATADV_FLAG_NEED_MESH | 1474 BATADV_FLAG_NEED_VLAN, 1475 }, 1476 { 1477 .cmd = BATADV_CMD_SET_VLAN, 1478 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1479 .flags = GENL_ADMIN_PERM, 1480 .doit = batadv_netlink_set_vlan, 1481 .internal_flags = BATADV_FLAG_NEED_MESH | 1482 BATADV_FLAG_NEED_VLAN, 1483 }, 1484 }; 1485 1486 struct genl_family batadv_netlink_family __ro_after_init = { 1487 .hdrsize = 0, 1488 .name = BATADV_NL_NAME, 1489 .version = 1, 1490 .maxattr = BATADV_ATTR_MAX, 1491 .policy = batadv_netlink_policy, 1492 .netnsok = true, 1493 .pre_doit = batadv_pre_doit, 1494 .post_doit = batadv_post_doit, 1495 .module = THIS_MODULE, 1496 .small_ops = batadv_netlink_ops, 1497 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops), 1498 .mcgrps = batadv_netlink_mcgrps, 1499 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps), 1500 }; 1501 1502 /** 1503 * batadv_netlink_register() - register batadv genl netlink family 1504 */ 1505 void __init batadv_netlink_register(void) 1506 { 1507 int ret; 1508 1509 ret = genl_register_family(&batadv_netlink_family); 1510 if (ret) 1511 pr_warn("unable to register netlink family"); 1512 } 1513 1514 /** 1515 * batadv_netlink_unregister() - unregister batadv genl netlink family 1516 */ 1517 void batadv_netlink_unregister(void) 1518 { 1519 genl_unregister_family(&batadv_netlink_family); 1520 } 1521