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