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 batadv_hardif_put(primary_if); 363 364 genlmsg_end(msg, hdr); 365 return 0; 366 367 nla_put_failure: 368 batadv_hardif_put(primary_if); 369 370 genlmsg_cancel(msg, hdr); 371 return -EMSGSIZE; 372 } 373 374 /** 375 * batadv_netlink_notify_mesh() - send softif attributes to listener 376 * @bat_priv: the bat priv with all the soft interface information 377 * 378 * Return: 0 on success, < 0 on error 379 */ 380 static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv) 381 { 382 struct sk_buff *msg; 383 int ret; 384 385 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 386 if (!msg) 387 return -ENOMEM; 388 389 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH, 390 0, 0, 0); 391 if (ret < 0) { 392 nlmsg_free(msg); 393 return ret; 394 } 395 396 genlmsg_multicast_netns(&batadv_netlink_family, 397 dev_net(bat_priv->soft_iface), msg, 0, 398 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 399 400 return 0; 401 } 402 403 /** 404 * batadv_netlink_get_mesh() - Get softif attributes 405 * @skb: Netlink message with request data 406 * @info: receiver information 407 * 408 * Return: 0 on success or negative error number in case of failure 409 */ 410 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info) 411 { 412 struct batadv_priv *bat_priv = info->user_ptr[0]; 413 struct sk_buff *msg; 414 int ret; 415 416 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 417 if (!msg) 418 return -ENOMEM; 419 420 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH, 421 info->snd_portid, info->snd_seq, 0); 422 if (ret < 0) { 423 nlmsg_free(msg); 424 return ret; 425 } 426 427 ret = genlmsg_reply(msg, info); 428 429 return ret; 430 } 431 432 /** 433 * batadv_netlink_set_mesh() - Set softif attributes 434 * @skb: Netlink message with request data 435 * @info: receiver information 436 * 437 * Return: 0 on success or negative error number in case of failure 438 */ 439 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info) 440 { 441 struct batadv_priv *bat_priv = info->user_ptr[0]; 442 struct nlattr *attr; 443 444 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) { 445 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]; 446 447 atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr)); 448 } 449 450 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 451 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 452 453 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv); 454 } 455 456 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) { 457 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK]; 458 459 bat_priv->isolation_mark = nla_get_u32(attr); 460 } 461 462 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) { 463 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK]; 464 465 bat_priv->isolation_mark_mask = nla_get_u32(attr); 466 } 467 468 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) { 469 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED]; 470 471 atomic_set(&bat_priv->bonding, !!nla_get_u8(attr)); 472 } 473 474 #ifdef CONFIG_BATMAN_ADV_BLA 475 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) { 476 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]; 477 478 atomic_set(&bat_priv->bridge_loop_avoidance, 479 !!nla_get_u8(attr)); 480 batadv_bla_status_update(bat_priv->soft_iface); 481 } 482 #endif /* CONFIG_BATMAN_ADV_BLA */ 483 484 #ifdef CONFIG_BATMAN_ADV_DAT 485 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) { 486 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]; 487 488 atomic_set(&bat_priv->distributed_arp_table, 489 !!nla_get_u8(attr)); 490 batadv_dat_status_update(bat_priv->soft_iface); 491 } 492 #endif /* CONFIG_BATMAN_ADV_DAT */ 493 494 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) { 495 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]; 496 497 atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr)); 498 499 rtnl_lock(); 500 batadv_update_min_mtu(bat_priv->soft_iface); 501 rtnl_unlock(); 502 } 503 504 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) { 505 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]; 506 507 atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr)); 508 batadv_gw_tvlv_container_update(bat_priv); 509 } 510 511 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) { 512 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]; 513 514 atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr)); 515 batadv_gw_tvlv_container_update(bat_priv); 516 } 517 518 if (info->attrs[BATADV_ATTR_GW_MODE]) { 519 u8 gw_mode; 520 521 attr = info->attrs[BATADV_ATTR_GW_MODE]; 522 gw_mode = nla_get_u8(attr); 523 524 if (gw_mode <= BATADV_GW_MODE_SERVER) { 525 /* Invoking batadv_gw_reselect() is not enough to really 526 * de-select the current GW. It will only instruct the 527 * gateway client code to perform a re-election the next 528 * time that this is needed. 529 * 530 * When gw client mode is being switched off the current 531 * GW must be de-selected explicitly otherwise no GW_ADD 532 * uevent is thrown on client mode re-activation. This 533 * is operation is performed in 534 * batadv_gw_check_client_stop(). 535 */ 536 batadv_gw_reselect(bat_priv); 537 538 /* always call batadv_gw_check_client_stop() before 539 * changing the gateway state 540 */ 541 batadv_gw_check_client_stop(bat_priv); 542 atomic_set(&bat_priv->gw.mode, gw_mode); 543 batadv_gw_tvlv_container_update(bat_priv); 544 } 545 } 546 547 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] && 548 bat_priv->algo_ops->gw.get_best_gw_node && 549 bat_priv->algo_ops->gw.is_eligible) { 550 /* setting the GW selection class is allowed only if the routing 551 * algorithm in use implements the GW API 552 */ 553 554 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max; 555 u32 sel_class; 556 557 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS]; 558 sel_class = nla_get_u32(attr); 559 560 if (sel_class >= 1 && sel_class <= sel_class_max) { 561 atomic_set(&bat_priv->gw.sel_class, sel_class); 562 batadv_gw_reselect(bat_priv); 563 } 564 } 565 566 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 567 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 568 569 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr)); 570 } 571 572 #ifdef CONFIG_BATMAN_ADV_DEBUG 573 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) { 574 attr = info->attrs[BATADV_ATTR_LOG_LEVEL]; 575 576 atomic_set(&bat_priv->log_level, 577 nla_get_u32(attr) & BATADV_DBG_ALL); 578 } 579 #endif /* CONFIG_BATMAN_ADV_DEBUG */ 580 581 #ifdef CONFIG_BATMAN_ADV_MCAST 582 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) { 583 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]; 584 585 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr)); 586 } 587 588 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) { 589 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT]; 590 591 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr)); 592 } 593 #endif /* CONFIG_BATMAN_ADV_MCAST */ 594 595 #ifdef CONFIG_BATMAN_ADV_NC 596 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) { 597 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]; 598 599 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr)); 600 batadv_nc_status_update(bat_priv->soft_iface); 601 } 602 #endif /* CONFIG_BATMAN_ADV_NC */ 603 604 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) { 605 u32 orig_interval; 606 607 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL]; 608 orig_interval = nla_get_u32(attr); 609 610 orig_interval = min_t(u32, orig_interval, INT_MAX); 611 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER); 612 613 atomic_set(&bat_priv->orig_interval, orig_interval); 614 } 615 616 batadv_netlink_notify_mesh(bat_priv); 617 618 return 0; 619 } 620 621 /** 622 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session 623 * @msg: netlink message to be sent back 624 * @cookie: tp meter session cookie 625 * 626 * Return: 0 on success, < 0 on error 627 */ 628 static int 629 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie) 630 { 631 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 632 return -ENOBUFS; 633 634 return 0; 635 } 636 637 /** 638 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client 639 * @bat_priv: the bat priv with all the soft interface information 640 * @dst: destination of tp_meter session 641 * @result: reason for tp meter session stop 642 * @test_time: total time of the tp_meter session 643 * @total_bytes: bytes acked to the receiver 644 * @cookie: cookie of tp_meter session 645 * 646 * Return: 0 on success, < 0 on error 647 */ 648 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, 649 u8 result, u32 test_time, u64 total_bytes, 650 u32 cookie) 651 { 652 struct sk_buff *msg; 653 void *hdr; 654 int ret; 655 656 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 657 if (!msg) 658 return -ENOMEM; 659 660 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0, 661 BATADV_CMD_TP_METER); 662 if (!hdr) { 663 ret = -ENOBUFS; 664 goto err_genlmsg; 665 } 666 667 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 668 goto nla_put_failure; 669 670 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time)) 671 goto nla_put_failure; 672 673 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes, 674 BATADV_ATTR_PAD)) 675 goto nla_put_failure; 676 677 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result)) 678 goto nla_put_failure; 679 680 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst)) 681 goto nla_put_failure; 682 683 genlmsg_end(msg, hdr); 684 685 genlmsg_multicast_netns(&batadv_netlink_family, 686 dev_net(bat_priv->soft_iface), msg, 0, 687 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL); 688 689 return 0; 690 691 nla_put_failure: 692 genlmsg_cancel(msg, hdr); 693 ret = -EMSGSIZE; 694 695 err_genlmsg: 696 nlmsg_free(msg); 697 return ret; 698 } 699 700 /** 701 * batadv_netlink_tp_meter_start() - Start a new tp_meter session 702 * @skb: received netlink message 703 * @info: receiver information 704 * 705 * Return: 0 on success, < 0 on error 706 */ 707 static int 708 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info) 709 { 710 struct batadv_priv *bat_priv = info->user_ptr[0]; 711 struct sk_buff *msg = NULL; 712 u32 test_length; 713 void *msg_head; 714 u32 cookie; 715 u8 *dst; 716 int ret; 717 718 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 719 return -EINVAL; 720 721 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]) 722 return -EINVAL; 723 724 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 725 726 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]); 727 728 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 729 if (!msg) { 730 ret = -ENOMEM; 731 goto out; 732 } 733 734 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq, 735 &batadv_netlink_family, 0, 736 BATADV_CMD_TP_METER); 737 if (!msg_head) { 738 ret = -ENOBUFS; 739 goto out; 740 } 741 742 batadv_tp_start(bat_priv, dst, test_length, &cookie); 743 744 ret = batadv_netlink_tp_meter_put(msg, cookie); 745 746 out: 747 if (ret) { 748 if (msg) 749 nlmsg_free(msg); 750 return ret; 751 } 752 753 genlmsg_end(msg, msg_head); 754 return genlmsg_reply(msg, info); 755 } 756 757 /** 758 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session 759 * @skb: received netlink message 760 * @info: receiver information 761 * 762 * Return: 0 on success, < 0 on error 763 */ 764 static int 765 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info) 766 { 767 struct batadv_priv *bat_priv = info->user_ptr[0]; 768 u8 *dst; 769 int ret = 0; 770 771 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 772 return -EINVAL; 773 774 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 775 776 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL); 777 778 return ret; 779 } 780 781 /** 782 * batadv_netlink_hardif_fill() - Fill message with hardif attributes 783 * @msg: Netlink message to dump into 784 * @bat_priv: the bat priv with all the soft interface information 785 * @hard_iface: hard interface which was modified 786 * @cmd: type of message to generate 787 * @portid: Port making netlink request 788 * @seq: sequence number for message 789 * @flags: Additional flags for message 790 * @cb: Control block containing additional options 791 * 792 * Return: 0 on success or negative error number in case of failure 793 */ 794 static int batadv_netlink_hardif_fill(struct sk_buff *msg, 795 struct batadv_priv *bat_priv, 796 struct batadv_hard_iface *hard_iface, 797 enum batadv_nl_commands cmd, 798 u32 portid, u32 seq, int flags, 799 struct netlink_callback *cb) 800 { 801 struct net_device *net_dev = hard_iface->net_dev; 802 void *hdr; 803 804 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 805 if (!hdr) 806 return -ENOBUFS; 807 808 if (cb) 809 genl_dump_check_consistent(cb, hdr); 810 811 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 812 bat_priv->soft_iface->ifindex)) 813 goto nla_put_failure; 814 815 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, 816 bat_priv->soft_iface->name)) 817 goto nla_put_failure; 818 819 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, 820 net_dev->ifindex) || 821 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, 822 net_dev->name) || 823 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, 824 net_dev->dev_addr)) 825 goto nla_put_failure; 826 827 if (hard_iface->if_status == BATADV_IF_ACTIVE) { 828 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE)) 829 goto nla_put_failure; 830 } 831 832 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY, 833 atomic_read(&hard_iface->hop_penalty))) 834 goto nla_put_failure; 835 836 #ifdef CONFIG_BATMAN_ADV_BATMAN_V 837 if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL, 838 atomic_read(&hard_iface->bat_v.elp_interval))) 839 goto nla_put_failure; 840 841 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE, 842 atomic_read(&hard_iface->bat_v.throughput_override))) 843 goto nla_put_failure; 844 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */ 845 846 genlmsg_end(msg, hdr); 847 return 0; 848 849 nla_put_failure: 850 genlmsg_cancel(msg, hdr); 851 return -EMSGSIZE; 852 } 853 854 /** 855 * batadv_netlink_notify_hardif() - send hardif attributes to listener 856 * @bat_priv: the bat priv with all the soft interface information 857 * @hard_iface: hard interface which was modified 858 * 859 * Return: 0 on success, < 0 on error 860 */ 861 static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv, 862 struct batadv_hard_iface *hard_iface) 863 { 864 struct sk_buff *msg; 865 int ret; 866 867 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 868 if (!msg) 869 return -ENOMEM; 870 871 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 872 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL); 873 if (ret < 0) { 874 nlmsg_free(msg); 875 return ret; 876 } 877 878 genlmsg_multicast_netns(&batadv_netlink_family, 879 dev_net(bat_priv->soft_iface), msg, 0, 880 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 881 882 return 0; 883 } 884 885 /** 886 * batadv_netlink_get_hardif() - Get hardif attributes 887 * @skb: Netlink message with request data 888 * @info: receiver information 889 * 890 * Return: 0 on success or negative error number in case of failure 891 */ 892 static int batadv_netlink_get_hardif(struct sk_buff *skb, 893 struct genl_info *info) 894 { 895 struct batadv_hard_iface *hard_iface = info->user_ptr[1]; 896 struct batadv_priv *bat_priv = info->user_ptr[0]; 897 struct sk_buff *msg; 898 int ret; 899 900 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 901 if (!msg) 902 return -ENOMEM; 903 904 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 905 BATADV_CMD_GET_HARDIF, 906 info->snd_portid, info->snd_seq, 0, 907 NULL); 908 if (ret < 0) { 909 nlmsg_free(msg); 910 return ret; 911 } 912 913 ret = genlmsg_reply(msg, info); 914 915 return ret; 916 } 917 918 /** 919 * batadv_netlink_set_hardif() - Set hardif attributes 920 * @skb: Netlink message with request data 921 * @info: receiver information 922 * 923 * Return: 0 on success or negative error number in case of failure 924 */ 925 static int batadv_netlink_set_hardif(struct sk_buff *skb, 926 struct genl_info *info) 927 { 928 struct batadv_hard_iface *hard_iface = info->user_ptr[1]; 929 struct batadv_priv *bat_priv = info->user_ptr[0]; 930 struct nlattr *attr; 931 932 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 933 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 934 935 atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr)); 936 } 937 938 #ifdef CONFIG_BATMAN_ADV_BATMAN_V 939 940 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) { 941 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL]; 942 943 atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr)); 944 } 945 946 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) { 947 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]; 948 949 atomic_set(&hard_iface->bat_v.throughput_override, 950 nla_get_u32(attr)); 951 } 952 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */ 953 954 batadv_netlink_notify_hardif(bat_priv, hard_iface); 955 956 return 0; 957 } 958 959 /** 960 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages 961 * @msg: Netlink message to dump into 962 * @cb: Parameters from query 963 * 964 * Return: error code, or length of reply message on success 965 */ 966 static int 967 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb) 968 { 969 struct net *net = sock_net(cb->skb->sk); 970 struct net_device *soft_iface; 971 struct batadv_hard_iface *hard_iface; 972 struct batadv_priv *bat_priv; 973 int ifindex; 974 int portid = NETLINK_CB(cb->skb).portid; 975 int skip = cb->args[0]; 976 int i = 0; 977 978 ifindex = batadv_netlink_get_ifindex(cb->nlh, 979 BATADV_ATTR_MESH_IFINDEX); 980 if (!ifindex) 981 return -EINVAL; 982 983 soft_iface = dev_get_by_index(net, ifindex); 984 if (!soft_iface) 985 return -ENODEV; 986 987 if (!batadv_softif_is_valid(soft_iface)) { 988 dev_put(soft_iface); 989 return -ENODEV; 990 } 991 992 bat_priv = netdev_priv(soft_iface); 993 994 rtnl_lock(); 995 cb->seq = batadv_hardif_generation << 1 | 1; 996 997 list_for_each_entry(hard_iface, &batadv_hardif_list, list) { 998 if (hard_iface->soft_iface != soft_iface) 999 continue; 1000 1001 if (i++ < skip) 1002 continue; 1003 1004 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 1005 BATADV_CMD_GET_HARDIF, 1006 portid, cb->nlh->nlmsg_seq, 1007 NLM_F_MULTI, cb)) { 1008 i--; 1009 break; 1010 } 1011 } 1012 1013 rtnl_unlock(); 1014 1015 dev_put(soft_iface); 1016 1017 cb->args[0] = i; 1018 1019 return msg->len; 1020 } 1021 1022 /** 1023 * batadv_netlink_vlan_fill() - Fill message with vlan attributes 1024 * @msg: Netlink message to dump into 1025 * @bat_priv: the bat priv with all the soft interface information 1026 * @vlan: vlan which was modified 1027 * @cmd: type of message to generate 1028 * @portid: Port making netlink request 1029 * @seq: sequence number for message 1030 * @flags: Additional flags for message 1031 * 1032 * Return: 0 on success or negative error number in case of failure 1033 */ 1034 static int batadv_netlink_vlan_fill(struct sk_buff *msg, 1035 struct batadv_priv *bat_priv, 1036 struct batadv_softif_vlan *vlan, 1037 enum batadv_nl_commands cmd, 1038 u32 portid, u32 seq, int flags) 1039 { 1040 void *hdr; 1041 1042 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 1043 if (!hdr) 1044 return -ENOBUFS; 1045 1046 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 1047 bat_priv->soft_iface->ifindex)) 1048 goto nla_put_failure; 1049 1050 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, 1051 bat_priv->soft_iface->name)) 1052 goto nla_put_failure; 1053 1054 if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK)) 1055 goto nla_put_failure; 1056 1057 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED, 1058 !!atomic_read(&vlan->ap_isolation))) 1059 goto nla_put_failure; 1060 1061 genlmsg_end(msg, hdr); 1062 return 0; 1063 1064 nla_put_failure: 1065 genlmsg_cancel(msg, hdr); 1066 return -EMSGSIZE; 1067 } 1068 1069 /** 1070 * batadv_netlink_notify_vlan() - send vlan attributes to listener 1071 * @bat_priv: the bat priv with all the soft interface information 1072 * @vlan: vlan which was modified 1073 * 1074 * Return: 0 on success, < 0 on error 1075 */ 1076 static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv, 1077 struct batadv_softif_vlan *vlan) 1078 { 1079 struct sk_buff *msg; 1080 int ret; 1081 1082 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1083 if (!msg) 1084 return -ENOMEM; 1085 1086 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, 1087 BATADV_CMD_SET_VLAN, 0, 0, 0); 1088 if (ret < 0) { 1089 nlmsg_free(msg); 1090 return ret; 1091 } 1092 1093 genlmsg_multicast_netns(&batadv_netlink_family, 1094 dev_net(bat_priv->soft_iface), msg, 0, 1095 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 1096 1097 return 0; 1098 } 1099 1100 /** 1101 * batadv_netlink_get_vlan() - Get vlan attributes 1102 * @skb: Netlink message with request data 1103 * @info: receiver information 1104 * 1105 * Return: 0 on success or negative error number in case of failure 1106 */ 1107 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info) 1108 { 1109 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1110 struct batadv_priv *bat_priv = info->user_ptr[0]; 1111 struct sk_buff *msg; 1112 int ret; 1113 1114 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1115 if (!msg) 1116 return -ENOMEM; 1117 1118 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN, 1119 info->snd_portid, info->snd_seq, 0); 1120 if (ret < 0) { 1121 nlmsg_free(msg); 1122 return ret; 1123 } 1124 1125 ret = genlmsg_reply(msg, info); 1126 1127 return ret; 1128 } 1129 1130 /** 1131 * batadv_netlink_set_vlan() - Get vlan attributes 1132 * @skb: Netlink message with request data 1133 * @info: receiver information 1134 * 1135 * Return: 0 on success or negative error number in case of failure 1136 */ 1137 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info) 1138 { 1139 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1140 struct batadv_priv *bat_priv = info->user_ptr[0]; 1141 struct nlattr *attr; 1142 1143 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 1144 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 1145 1146 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr)); 1147 } 1148 1149 batadv_netlink_notify_vlan(bat_priv, vlan); 1150 1151 return 0; 1152 } 1153 1154 /** 1155 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes 1156 * @net: the applicable net namespace 1157 * @info: receiver information 1158 * 1159 * Return: Pointer to soft interface (with increased refcnt) on success, error 1160 * pointer on error 1161 */ 1162 static struct net_device * 1163 batadv_get_softif_from_info(struct net *net, struct genl_info *info) 1164 { 1165 struct net_device *soft_iface; 1166 int ifindex; 1167 1168 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) 1169 return ERR_PTR(-EINVAL); 1170 1171 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); 1172 1173 soft_iface = dev_get_by_index(net, ifindex); 1174 if (!soft_iface) 1175 return ERR_PTR(-ENODEV); 1176 1177 if (!batadv_softif_is_valid(soft_iface)) 1178 goto err_put_softif; 1179 1180 return soft_iface; 1181 1182 err_put_softif: 1183 dev_put(soft_iface); 1184 1185 return ERR_PTR(-EINVAL); 1186 } 1187 1188 /** 1189 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes 1190 * @bat_priv: the bat priv with all the soft interface information 1191 * @net: the applicable net namespace 1192 * @info: receiver information 1193 * 1194 * Return: Pointer to hard interface (with increased refcnt) on success, error 1195 * pointer on error 1196 */ 1197 static struct batadv_hard_iface * 1198 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net, 1199 struct genl_info *info) 1200 { 1201 struct batadv_hard_iface *hard_iface; 1202 struct net_device *hard_dev; 1203 unsigned int hardif_index; 1204 1205 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX]) 1206 return ERR_PTR(-EINVAL); 1207 1208 hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]); 1209 1210 hard_dev = dev_get_by_index(net, hardif_index); 1211 if (!hard_dev) 1212 return ERR_PTR(-ENODEV); 1213 1214 hard_iface = batadv_hardif_get_by_netdev(hard_dev); 1215 if (!hard_iface) 1216 goto err_put_harddev; 1217 1218 if (hard_iface->soft_iface != bat_priv->soft_iface) 1219 goto err_put_hardif; 1220 1221 /* hard_dev is referenced by hard_iface and not needed here */ 1222 dev_put(hard_dev); 1223 1224 return hard_iface; 1225 1226 err_put_hardif: 1227 batadv_hardif_put(hard_iface); 1228 err_put_harddev: 1229 dev_put(hard_dev); 1230 1231 return ERR_PTR(-EINVAL); 1232 } 1233 1234 /** 1235 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes 1236 * @bat_priv: the bat priv with all the soft interface information 1237 * @net: the applicable net namespace 1238 * @info: receiver information 1239 * 1240 * Return: Pointer to vlan on success (with increased refcnt), error pointer 1241 * on error 1242 */ 1243 static struct batadv_softif_vlan * 1244 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net, 1245 struct genl_info *info) 1246 { 1247 struct batadv_softif_vlan *vlan; 1248 u16 vid; 1249 1250 if (!info->attrs[BATADV_ATTR_VLANID]) 1251 return ERR_PTR(-EINVAL); 1252 1253 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]); 1254 1255 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); 1256 if (!vlan) 1257 return ERR_PTR(-ENOENT); 1258 1259 return vlan; 1260 } 1261 1262 /** 1263 * batadv_pre_doit() - Prepare batman-adv genl doit request 1264 * @ops: requested netlink operation 1265 * @skb: Netlink message with request data 1266 * @info: receiver information 1267 * 1268 * Return: 0 on success or negative error number in case of failure 1269 */ 1270 static int batadv_pre_doit(const struct genl_split_ops *ops, 1271 struct sk_buff *skb, 1272 struct genl_info *info) 1273 { 1274 struct net *net = genl_info_net(info); 1275 struct batadv_hard_iface *hard_iface; 1276 struct batadv_priv *bat_priv = NULL; 1277 struct batadv_softif_vlan *vlan; 1278 struct net_device *soft_iface; 1279 u8 user_ptr1_flags; 1280 u8 mesh_dep_flags; 1281 int ret; 1282 1283 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1284 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1)) 1285 return -EINVAL; 1286 1287 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1288 if (WARN_ON((ops->internal_flags & mesh_dep_flags) && 1289 (~ops->internal_flags & BATADV_FLAG_NEED_MESH))) 1290 return -EINVAL; 1291 1292 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) { 1293 soft_iface = batadv_get_softif_from_info(net, info); 1294 if (IS_ERR(soft_iface)) 1295 return PTR_ERR(soft_iface); 1296 1297 bat_priv = netdev_priv(soft_iface); 1298 info->user_ptr[0] = bat_priv; 1299 } 1300 1301 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) { 1302 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info); 1303 if (IS_ERR(hard_iface)) { 1304 ret = PTR_ERR(hard_iface); 1305 goto err_put_softif; 1306 } 1307 1308 info->user_ptr[1] = hard_iface; 1309 } 1310 1311 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) { 1312 vlan = batadv_get_vlan_from_info(bat_priv, net, info); 1313 if (IS_ERR(vlan)) { 1314 ret = PTR_ERR(vlan); 1315 goto err_put_softif; 1316 } 1317 1318 info->user_ptr[1] = vlan; 1319 } 1320 1321 return 0; 1322 1323 err_put_softif: 1324 if (bat_priv) 1325 dev_put(bat_priv->soft_iface); 1326 1327 return ret; 1328 } 1329 1330 /** 1331 * batadv_post_doit() - End batman-adv genl doit request 1332 * @ops: requested netlink operation 1333 * @skb: Netlink message with request data 1334 * @info: receiver information 1335 */ 1336 static void batadv_post_doit(const struct genl_split_ops *ops, 1337 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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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_UNS_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 .resv_start_op = BATADV_CMD_SET_VLAN + 1, 1499 .mcgrps = batadv_netlink_mcgrps, 1500 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps), 1501 }; 1502 1503 /** 1504 * batadv_netlink_register() - register batadv genl netlink family 1505 */ 1506 void __init batadv_netlink_register(void) 1507 { 1508 int ret; 1509 1510 ret = genl_register_family(&batadv_netlink_family); 1511 if (ret) 1512 pr_warn("unable to register netlink family"); 1513 } 1514 1515 /** 1516 * batadv_netlink_unregister() - unregister batadv genl netlink family 1517 */ 1518 void batadv_netlink_unregister(void) 1519 { 1520 genl_unregister_family(&batadv_netlink_family); 1521 } 1522