1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) B.A.T.M.A.N. contributors: 3 * 4 * Matthias Schiffer 5 */ 6 7 #include "netlink.h" 8 #include "main.h" 9 10 #include <linux/atomic.h> 11 #include <linux/bitops.h> 12 #include <linux/bug.h> 13 #include <linux/byteorder/generic.h> 14 #include <linux/cache.h> 15 #include <linux/err.h> 16 #include <linux/errno.h> 17 #include <linux/export.h> 18 #include <linux/genetlink.h> 19 #include <linux/gfp.h> 20 #include <linux/if_ether.h> 21 #include <linux/if_vlan.h> 22 #include <linux/init.h> 23 #include <linux/kernel.h> 24 #include <linux/limits.h> 25 #include <linux/list.h> 26 #include <linux/minmax.h> 27 #include <linux/netdevice.h> 28 #include <linux/netlink.h> 29 #include <linux/printk.h> 30 #include <linux/rtnetlink.h> 31 #include <linux/skbuff.h> 32 #include <linux/stddef.h> 33 #include <linux/types.h> 34 #include <net/genetlink.h> 35 #include <net/net_namespace.h> 36 #include <net/netlink.h> 37 #include <net/sock.h> 38 #include <uapi/linux/batadv_packet.h> 39 #include <uapi/linux/batman_adv.h> 40 41 #include "bat_algo.h" 42 #include "bridge_loop_avoidance.h" 43 #include "distributed-arp-table.h" 44 #include "gateway_client.h" 45 #include "gateway_common.h" 46 #include "hard-interface.h" 47 #include "log.h" 48 #include "multicast.h" 49 #include "network-coding.h" 50 #include "originator.h" 51 #include "soft-interface.h" 52 #include "tp_meter.h" 53 #include "translation-table.h" 54 55 struct genl_family batadv_netlink_family; 56 57 /* multicast groups */ 58 enum batadv_netlink_multicast_groups { 59 BATADV_NL_MCGRP_CONFIG, 60 BATADV_NL_MCGRP_TPMETER, 61 }; 62 63 /** 64 * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags 65 */ 66 enum batadv_genl_ops_flags { 67 /** 68 * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in 69 * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be 70 * saved in info->user_ptr[0] 71 */ 72 BATADV_FLAG_NEED_MESH = BIT(0), 73 74 /** 75 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in 76 * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be 77 * saved in info->user_ptr[1] 78 */ 79 BATADV_FLAG_NEED_HARDIF = BIT(1), 80 81 /** 82 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in 83 * attribute BATADV_ATTR_VLANID and expects a pointer to it to be 84 * saved in info->user_ptr[1] 85 */ 86 BATADV_FLAG_NEED_VLAN = BIT(2), 87 }; 88 89 static const struct genl_multicast_group batadv_netlink_mcgrps[] = { 90 [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG }, 91 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER }, 92 }; 93 94 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { 95 [BATADV_ATTR_VERSION] = { .type = NLA_STRING }, 96 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING }, 97 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 }, 98 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING }, 99 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN }, 100 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 }, 101 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING }, 102 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN }, 103 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN }, 104 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 }, 105 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 }, 106 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 }, 107 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 }, 108 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG }, 109 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN }, 110 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 }, 111 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 }, 112 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 }, 113 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 }, 114 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 }, 115 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG }, 116 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, 117 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN }, 118 [BATADV_ATTR_TQ] = { .type = NLA_U8 }, 119 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 }, 120 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 }, 121 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 }, 122 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN }, 123 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG }, 124 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN }, 125 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 }, 126 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN }, 127 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 }, 128 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 }, 129 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN }, 130 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 }, 131 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 }, 132 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 }, 133 [BATADV_ATTR_VLANID] = { .type = NLA_U16 }, 134 [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 }, 135 [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 }, 136 [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 }, 137 [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 }, 138 [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 }, 139 [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 }, 140 [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 }, 141 [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 }, 142 [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 }, 143 [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 }, 144 [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 }, 145 [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 }, 146 [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 }, 147 [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 }, 148 [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 }, 149 [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 }, 150 [BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 }, 151 [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 }, 152 [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 }, 153 [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 }, 154 }; 155 156 /** 157 * batadv_netlink_get_ifindex() - Extract an interface index from a message 158 * @nlh: Message header 159 * @attrtype: Attribute which holds an interface index 160 * 161 * Return: interface index, or 0. 162 */ 163 int 164 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) 165 { 166 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); 167 168 return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0; 169 } 170 171 /** 172 * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute 173 * @msg: Netlink message to dump into 174 * @bat_priv: the bat priv with all the soft interface information 175 * 176 * Return: 0 on success or negative error number in case of failure 177 */ 178 static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg, 179 struct batadv_priv *bat_priv) 180 { 181 struct batadv_softif_vlan *vlan; 182 u8 ap_isolation; 183 184 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); 185 if (!vlan) 186 return 0; 187 188 ap_isolation = atomic_read(&vlan->ap_isolation); 189 batadv_softif_vlan_put(vlan); 190 191 return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED, 192 !!ap_isolation); 193 } 194 195 /** 196 * batadv_netlink_set_mesh_ap_isolation() - Set ap_isolation from genl msg 197 * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute 198 * @bat_priv: the bat priv with all the soft interface information 199 * 200 * Return: 0 on success or negative error number in case of failure 201 */ 202 static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr, 203 struct batadv_priv *bat_priv) 204 { 205 struct batadv_softif_vlan *vlan; 206 207 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); 208 if (!vlan) 209 return -ENOENT; 210 211 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr)); 212 batadv_softif_vlan_put(vlan); 213 214 return 0; 215 } 216 217 /** 218 * batadv_netlink_mesh_fill() - Fill message with mesh attributes 219 * @msg: Netlink message to dump into 220 * @bat_priv: the bat priv with all the soft interface information 221 * @cmd: type of message to generate 222 * @portid: Port making netlink request 223 * @seq: sequence number for message 224 * @flags: Additional flags for message 225 * 226 * Return: 0 on success or negative error number in case of failure 227 */ 228 static int batadv_netlink_mesh_fill(struct sk_buff *msg, 229 struct batadv_priv *bat_priv, 230 enum batadv_nl_commands cmd, 231 u32 portid, u32 seq, int flags) 232 { 233 struct net_device *soft_iface = bat_priv->soft_iface; 234 struct batadv_hard_iface *primary_if = NULL; 235 struct net_device *hard_iface; 236 void *hdr; 237 238 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 239 if (!hdr) 240 return -ENOBUFS; 241 242 if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) || 243 nla_put_string(msg, BATADV_ATTR_ALGO_NAME, 244 bat_priv->algo_ops->name) || 245 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) || 246 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) || 247 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN, 248 soft_iface->dev_addr) || 249 nla_put_u8(msg, BATADV_ATTR_TT_TTVN, 250 (u8)atomic_read(&bat_priv->tt.vn))) 251 goto nla_put_failure; 252 253 #ifdef CONFIG_BATMAN_ADV_BLA 254 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC, 255 ntohs(bat_priv->bla.claim_dest.group))) 256 goto nla_put_failure; 257 #endif 258 259 if (batadv_mcast_mesh_info_put(msg, bat_priv)) 260 goto nla_put_failure; 261 262 primary_if = batadv_primary_if_get_selected(bat_priv); 263 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) { 264 hard_iface = primary_if->net_dev; 265 266 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, 267 hard_iface->ifindex) || 268 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, 269 hard_iface->name) || 270 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, 271 hard_iface->dev_addr)) 272 goto nla_put_failure; 273 } 274 275 if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED, 276 !!atomic_read(&bat_priv->aggregated_ogms))) 277 goto nla_put_failure; 278 279 if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv)) 280 goto nla_put_failure; 281 282 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK, 283 bat_priv->isolation_mark)) 284 goto nla_put_failure; 285 286 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK, 287 bat_priv->isolation_mark_mask)) 288 goto nla_put_failure; 289 290 if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED, 291 !!atomic_read(&bat_priv->bonding))) 292 goto nla_put_failure; 293 294 #ifdef CONFIG_BATMAN_ADV_BLA 295 if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED, 296 !!atomic_read(&bat_priv->bridge_loop_avoidance))) 297 goto nla_put_failure; 298 #endif /* CONFIG_BATMAN_ADV_BLA */ 299 300 #ifdef CONFIG_BATMAN_ADV_DAT 301 if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED, 302 !!atomic_read(&bat_priv->distributed_arp_table))) 303 goto nla_put_failure; 304 #endif /* CONFIG_BATMAN_ADV_DAT */ 305 306 if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED, 307 !!atomic_read(&bat_priv->fragmentation))) 308 goto nla_put_failure; 309 310 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN, 311 atomic_read(&bat_priv->gw.bandwidth_down))) 312 goto nla_put_failure; 313 314 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP, 315 atomic_read(&bat_priv->gw.bandwidth_up))) 316 goto nla_put_failure; 317 318 if (nla_put_u8(msg, BATADV_ATTR_GW_MODE, 319 atomic_read(&bat_priv->gw.mode))) 320 goto nla_put_failure; 321 322 if (bat_priv->algo_ops->gw.get_best_gw_node && 323 bat_priv->algo_ops->gw.is_eligible) { 324 /* GW selection class is not available if the routing algorithm 325 * in use does not implement the GW API 326 */ 327 if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS, 328 atomic_read(&bat_priv->gw.sel_class))) 329 goto nla_put_failure; 330 } 331 332 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY, 333 atomic_read(&bat_priv->hop_penalty))) 334 goto nla_put_failure; 335 336 #ifdef CONFIG_BATMAN_ADV_DEBUG 337 if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL, 338 atomic_read(&bat_priv->log_level))) 339 goto nla_put_failure; 340 #endif /* CONFIG_BATMAN_ADV_DEBUG */ 341 342 #ifdef CONFIG_BATMAN_ADV_MCAST 343 if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED, 344 !atomic_read(&bat_priv->multicast_mode))) 345 goto nla_put_failure; 346 347 if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT, 348 atomic_read(&bat_priv->multicast_fanout))) 349 goto nla_put_failure; 350 #endif /* CONFIG_BATMAN_ADV_MCAST */ 351 352 #ifdef CONFIG_BATMAN_ADV_NC 353 if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED, 354 !!atomic_read(&bat_priv->network_coding))) 355 goto nla_put_failure; 356 #endif /* CONFIG_BATMAN_ADV_NC */ 357 358 if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL, 359 atomic_read(&bat_priv->orig_interval))) 360 goto nla_put_failure; 361 362 if (primary_if) 363 batadv_hardif_put(primary_if); 364 365 genlmsg_end(msg, hdr); 366 return 0; 367 368 nla_put_failure: 369 if (primary_if) 370 batadv_hardif_put(primary_if); 371 372 genlmsg_cancel(msg, hdr); 373 return -EMSGSIZE; 374 } 375 376 /** 377 * batadv_netlink_notify_mesh() - send softif attributes to listener 378 * @bat_priv: the bat priv with all the soft interface information 379 * 380 * Return: 0 on success, < 0 on error 381 */ 382 int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv) 383 { 384 struct sk_buff *msg; 385 int ret; 386 387 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 388 if (!msg) 389 return -ENOMEM; 390 391 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH, 392 0, 0, 0); 393 if (ret < 0) { 394 nlmsg_free(msg); 395 return ret; 396 } 397 398 genlmsg_multicast_netns(&batadv_netlink_family, 399 dev_net(bat_priv->soft_iface), msg, 0, 400 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 401 402 return 0; 403 } 404 405 /** 406 * batadv_netlink_get_mesh() - Get softif attributes 407 * @skb: Netlink message with request data 408 * @info: receiver information 409 * 410 * Return: 0 on success or negative error number in case of failure 411 */ 412 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info) 413 { 414 struct batadv_priv *bat_priv = info->user_ptr[0]; 415 struct sk_buff *msg; 416 int ret; 417 418 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 419 if (!msg) 420 return -ENOMEM; 421 422 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH, 423 info->snd_portid, info->snd_seq, 0); 424 if (ret < 0) { 425 nlmsg_free(msg); 426 return ret; 427 } 428 429 ret = genlmsg_reply(msg, info); 430 431 return ret; 432 } 433 434 /** 435 * batadv_netlink_set_mesh() - Set softif attributes 436 * @skb: Netlink message with request data 437 * @info: receiver information 438 * 439 * Return: 0 on success or negative error number in case of failure 440 */ 441 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info) 442 { 443 struct batadv_priv *bat_priv = info->user_ptr[0]; 444 struct nlattr *attr; 445 446 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) { 447 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]; 448 449 atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr)); 450 } 451 452 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 453 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 454 455 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv); 456 } 457 458 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) { 459 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK]; 460 461 bat_priv->isolation_mark = nla_get_u32(attr); 462 } 463 464 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) { 465 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK]; 466 467 bat_priv->isolation_mark_mask = nla_get_u32(attr); 468 } 469 470 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) { 471 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED]; 472 473 atomic_set(&bat_priv->bonding, !!nla_get_u8(attr)); 474 } 475 476 #ifdef CONFIG_BATMAN_ADV_BLA 477 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) { 478 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]; 479 480 atomic_set(&bat_priv->bridge_loop_avoidance, 481 !!nla_get_u8(attr)); 482 batadv_bla_status_update(bat_priv->soft_iface); 483 } 484 #endif /* CONFIG_BATMAN_ADV_BLA */ 485 486 #ifdef CONFIG_BATMAN_ADV_DAT 487 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) { 488 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]; 489 490 atomic_set(&bat_priv->distributed_arp_table, 491 !!nla_get_u8(attr)); 492 batadv_dat_status_update(bat_priv->soft_iface); 493 } 494 #endif /* CONFIG_BATMAN_ADV_DAT */ 495 496 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) { 497 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]; 498 499 atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr)); 500 batadv_update_min_mtu(bat_priv->soft_iface); 501 } 502 503 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) { 504 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]; 505 506 atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr)); 507 batadv_gw_tvlv_container_update(bat_priv); 508 } 509 510 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) { 511 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]; 512 513 atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr)); 514 batadv_gw_tvlv_container_update(bat_priv); 515 } 516 517 if (info->attrs[BATADV_ATTR_GW_MODE]) { 518 u8 gw_mode; 519 520 attr = info->attrs[BATADV_ATTR_GW_MODE]; 521 gw_mode = nla_get_u8(attr); 522 523 if (gw_mode <= BATADV_GW_MODE_SERVER) { 524 /* Invoking batadv_gw_reselect() is not enough to really 525 * de-select the current GW. It will only instruct the 526 * gateway client code to perform a re-election the next 527 * time that this is needed. 528 * 529 * When gw client mode is being switched off the current 530 * GW must be de-selected explicitly otherwise no GW_ADD 531 * uevent is thrown on client mode re-activation. This 532 * is operation is performed in 533 * batadv_gw_check_client_stop(). 534 */ 535 batadv_gw_reselect(bat_priv); 536 537 /* always call batadv_gw_check_client_stop() before 538 * changing the gateway state 539 */ 540 batadv_gw_check_client_stop(bat_priv); 541 atomic_set(&bat_priv->gw.mode, gw_mode); 542 batadv_gw_tvlv_container_update(bat_priv); 543 } 544 } 545 546 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] && 547 bat_priv->algo_ops->gw.get_best_gw_node && 548 bat_priv->algo_ops->gw.is_eligible) { 549 /* setting the GW selection class is allowed only if the routing 550 * algorithm in use implements the GW API 551 */ 552 553 u32 sel_class_max = 0xffffffffu; 554 u32 sel_class; 555 556 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS]; 557 sel_class = nla_get_u32(attr); 558 559 if (!bat_priv->algo_ops->gw.store_sel_class) 560 sel_class_max = BATADV_TQ_MAX_VALUE; 561 562 if (sel_class >= 1 && sel_class <= sel_class_max) { 563 atomic_set(&bat_priv->gw.sel_class, sel_class); 564 batadv_gw_reselect(bat_priv); 565 } 566 } 567 568 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 569 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 570 571 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr)); 572 } 573 574 #ifdef CONFIG_BATMAN_ADV_DEBUG 575 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) { 576 attr = info->attrs[BATADV_ATTR_LOG_LEVEL]; 577 578 atomic_set(&bat_priv->log_level, 579 nla_get_u32(attr) & BATADV_DBG_ALL); 580 } 581 #endif /* CONFIG_BATMAN_ADV_DEBUG */ 582 583 #ifdef CONFIG_BATMAN_ADV_MCAST 584 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) { 585 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]; 586 587 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr)); 588 } 589 590 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) { 591 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT]; 592 593 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr)); 594 } 595 #endif /* CONFIG_BATMAN_ADV_MCAST */ 596 597 #ifdef CONFIG_BATMAN_ADV_NC 598 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) { 599 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]; 600 601 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr)); 602 batadv_nc_status_update(bat_priv->soft_iface); 603 } 604 #endif /* CONFIG_BATMAN_ADV_NC */ 605 606 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) { 607 u32 orig_interval; 608 609 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL]; 610 orig_interval = nla_get_u32(attr); 611 612 orig_interval = min_t(u32, orig_interval, INT_MAX); 613 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER); 614 615 atomic_set(&bat_priv->orig_interval, orig_interval); 616 } 617 618 batadv_netlink_notify_mesh(bat_priv); 619 620 return 0; 621 } 622 623 /** 624 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session 625 * @msg: netlink message to be sent back 626 * @cookie: tp meter session cookie 627 * 628 * Return: 0 on success, < 0 on error 629 */ 630 static int 631 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie) 632 { 633 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 634 return -ENOBUFS; 635 636 return 0; 637 } 638 639 /** 640 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client 641 * @bat_priv: the bat priv with all the soft interface information 642 * @dst: destination of tp_meter session 643 * @result: reason for tp meter session stop 644 * @test_time: total time of the tp_meter session 645 * @total_bytes: bytes acked to the receiver 646 * @cookie: cookie of tp_meter session 647 * 648 * Return: 0 on success, < 0 on error 649 */ 650 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, 651 u8 result, u32 test_time, u64 total_bytes, 652 u32 cookie) 653 { 654 struct sk_buff *msg; 655 void *hdr; 656 int ret; 657 658 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 659 if (!msg) 660 return -ENOMEM; 661 662 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0, 663 BATADV_CMD_TP_METER); 664 if (!hdr) { 665 ret = -ENOBUFS; 666 goto err_genlmsg; 667 } 668 669 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 670 goto nla_put_failure; 671 672 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time)) 673 goto nla_put_failure; 674 675 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes, 676 BATADV_ATTR_PAD)) 677 goto nla_put_failure; 678 679 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result)) 680 goto nla_put_failure; 681 682 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst)) 683 goto nla_put_failure; 684 685 genlmsg_end(msg, hdr); 686 687 genlmsg_multicast_netns(&batadv_netlink_family, 688 dev_net(bat_priv->soft_iface), msg, 0, 689 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL); 690 691 return 0; 692 693 nla_put_failure: 694 genlmsg_cancel(msg, hdr); 695 ret = -EMSGSIZE; 696 697 err_genlmsg: 698 nlmsg_free(msg); 699 return ret; 700 } 701 702 /** 703 * batadv_netlink_tp_meter_start() - Start a new tp_meter session 704 * @skb: received netlink message 705 * @info: receiver information 706 * 707 * Return: 0 on success, < 0 on error 708 */ 709 static int 710 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info) 711 { 712 struct batadv_priv *bat_priv = info->user_ptr[0]; 713 struct sk_buff *msg = NULL; 714 u32 test_length; 715 void *msg_head; 716 u32 cookie; 717 u8 *dst; 718 int ret; 719 720 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 721 return -EINVAL; 722 723 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]) 724 return -EINVAL; 725 726 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 727 728 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]); 729 730 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 731 if (!msg) { 732 ret = -ENOMEM; 733 goto out; 734 } 735 736 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq, 737 &batadv_netlink_family, 0, 738 BATADV_CMD_TP_METER); 739 if (!msg_head) { 740 ret = -ENOBUFS; 741 goto out; 742 } 743 744 batadv_tp_start(bat_priv, dst, test_length, &cookie); 745 746 ret = batadv_netlink_tp_meter_put(msg, cookie); 747 748 out: 749 if (ret) { 750 if (msg) 751 nlmsg_free(msg); 752 return ret; 753 } 754 755 genlmsg_end(msg, msg_head); 756 return genlmsg_reply(msg, info); 757 } 758 759 /** 760 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session 761 * @skb: received netlink message 762 * @info: receiver information 763 * 764 * Return: 0 on success, < 0 on error 765 */ 766 static int 767 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info) 768 { 769 struct batadv_priv *bat_priv = info->user_ptr[0]; 770 u8 *dst; 771 int ret = 0; 772 773 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 774 return -EINVAL; 775 776 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 777 778 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL); 779 780 return ret; 781 } 782 783 /** 784 * batadv_netlink_hardif_fill() - Fill message with hardif attributes 785 * @msg: Netlink message to dump into 786 * @bat_priv: the bat priv with all the soft interface information 787 * @hard_iface: hard interface which was modified 788 * @cmd: type of message to generate 789 * @portid: Port making netlink request 790 * @seq: sequence number for message 791 * @flags: Additional flags for message 792 * @cb: Control block containing additional options 793 * 794 * Return: 0 on success or negative error number in case of failure 795 */ 796 static int batadv_netlink_hardif_fill(struct sk_buff *msg, 797 struct batadv_priv *bat_priv, 798 struct batadv_hard_iface *hard_iface, 799 enum batadv_nl_commands cmd, 800 u32 portid, u32 seq, int flags, 801 struct netlink_callback *cb) 802 { 803 struct net_device *net_dev = hard_iface->net_dev; 804 void *hdr; 805 806 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 807 if (!hdr) 808 return -ENOBUFS; 809 810 if (cb) 811 genl_dump_check_consistent(cb, hdr); 812 813 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 814 bat_priv->soft_iface->ifindex)) 815 goto nla_put_failure; 816 817 if (nla_put_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 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_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK)) 1049 goto nla_put_failure; 1050 1051 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED, 1052 !!atomic_read(&vlan->ap_isolation))) 1053 goto nla_put_failure; 1054 1055 genlmsg_end(msg, hdr); 1056 return 0; 1057 1058 nla_put_failure: 1059 genlmsg_cancel(msg, hdr); 1060 return -EMSGSIZE; 1061 } 1062 1063 /** 1064 * batadv_netlink_notify_vlan() - send vlan attributes to listener 1065 * @bat_priv: the bat priv with all the soft interface information 1066 * @vlan: vlan which was modified 1067 * 1068 * Return: 0 on success, < 0 on error 1069 */ 1070 int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv, 1071 struct batadv_softif_vlan *vlan) 1072 { 1073 struct sk_buff *msg; 1074 int ret; 1075 1076 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1077 if (!msg) 1078 return -ENOMEM; 1079 1080 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, 1081 BATADV_CMD_SET_VLAN, 0, 0, 0); 1082 if (ret < 0) { 1083 nlmsg_free(msg); 1084 return ret; 1085 } 1086 1087 genlmsg_multicast_netns(&batadv_netlink_family, 1088 dev_net(bat_priv->soft_iface), msg, 0, 1089 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 1090 1091 return 0; 1092 } 1093 1094 /** 1095 * batadv_netlink_get_vlan() - Get vlan attributes 1096 * @skb: Netlink message with request data 1097 * @info: receiver information 1098 * 1099 * Return: 0 on success or negative error number in case of failure 1100 */ 1101 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info) 1102 { 1103 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1104 struct batadv_priv *bat_priv = info->user_ptr[0]; 1105 struct sk_buff *msg; 1106 int ret; 1107 1108 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1109 if (!msg) 1110 return -ENOMEM; 1111 1112 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN, 1113 info->snd_portid, info->snd_seq, 0); 1114 if (ret < 0) { 1115 nlmsg_free(msg); 1116 return ret; 1117 } 1118 1119 ret = genlmsg_reply(msg, info); 1120 1121 return ret; 1122 } 1123 1124 /** 1125 * batadv_netlink_set_vlan() - Get vlan attributes 1126 * @skb: Netlink message with request data 1127 * @info: receiver information 1128 * 1129 * Return: 0 on success or negative error number in case of failure 1130 */ 1131 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info) 1132 { 1133 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1134 struct batadv_priv *bat_priv = info->user_ptr[0]; 1135 struct nlattr *attr; 1136 1137 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 1138 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 1139 1140 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr)); 1141 } 1142 1143 batadv_netlink_notify_vlan(bat_priv, vlan); 1144 1145 return 0; 1146 } 1147 1148 /** 1149 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes 1150 * @net: the applicable net namespace 1151 * @info: receiver information 1152 * 1153 * Return: Pointer to soft interface (with increased refcnt) on success, error 1154 * pointer on error 1155 */ 1156 static struct net_device * 1157 batadv_get_softif_from_info(struct net *net, struct genl_info *info) 1158 { 1159 struct net_device *soft_iface; 1160 int ifindex; 1161 1162 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) 1163 return ERR_PTR(-EINVAL); 1164 1165 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); 1166 1167 soft_iface = dev_get_by_index(net, ifindex); 1168 if (!soft_iface) 1169 return ERR_PTR(-ENODEV); 1170 1171 if (!batadv_softif_is_valid(soft_iface)) 1172 goto err_put_softif; 1173 1174 return soft_iface; 1175 1176 err_put_softif: 1177 dev_put(soft_iface); 1178 1179 return ERR_PTR(-EINVAL); 1180 } 1181 1182 /** 1183 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes 1184 * @bat_priv: the bat priv with all the soft interface information 1185 * @net: the applicable net namespace 1186 * @info: receiver information 1187 * 1188 * Return: Pointer to hard interface (with increased refcnt) on success, error 1189 * pointer on error 1190 */ 1191 static struct batadv_hard_iface * 1192 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net, 1193 struct genl_info *info) 1194 { 1195 struct batadv_hard_iface *hard_iface; 1196 struct net_device *hard_dev; 1197 unsigned int hardif_index; 1198 1199 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX]) 1200 return ERR_PTR(-EINVAL); 1201 1202 hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]); 1203 1204 hard_dev = dev_get_by_index(net, hardif_index); 1205 if (!hard_dev) 1206 return ERR_PTR(-ENODEV); 1207 1208 hard_iface = batadv_hardif_get_by_netdev(hard_dev); 1209 if (!hard_iface) 1210 goto err_put_harddev; 1211 1212 if (hard_iface->soft_iface != bat_priv->soft_iface) 1213 goto err_put_hardif; 1214 1215 /* hard_dev is referenced by hard_iface and not needed here */ 1216 dev_put(hard_dev); 1217 1218 return hard_iface; 1219 1220 err_put_hardif: 1221 batadv_hardif_put(hard_iface); 1222 err_put_harddev: 1223 dev_put(hard_dev); 1224 1225 return ERR_PTR(-EINVAL); 1226 } 1227 1228 /** 1229 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes 1230 * @bat_priv: the bat priv with all the soft interface information 1231 * @net: the applicable net namespace 1232 * @info: receiver information 1233 * 1234 * Return: Pointer to vlan on success (with increased refcnt), error pointer 1235 * on error 1236 */ 1237 static struct batadv_softif_vlan * 1238 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net, 1239 struct genl_info *info) 1240 { 1241 struct batadv_softif_vlan *vlan; 1242 u16 vid; 1243 1244 if (!info->attrs[BATADV_ATTR_VLANID]) 1245 return ERR_PTR(-EINVAL); 1246 1247 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]); 1248 1249 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); 1250 if (!vlan) 1251 return ERR_PTR(-ENOENT); 1252 1253 return vlan; 1254 } 1255 1256 /** 1257 * batadv_pre_doit() - Prepare batman-adv genl doit request 1258 * @ops: requested netlink operation 1259 * @skb: Netlink message with request data 1260 * @info: receiver information 1261 * 1262 * Return: 0 on success or negative error number in case of failure 1263 */ 1264 static int batadv_pre_doit(const struct genl_ops *ops, struct sk_buff *skb, 1265 struct genl_info *info) 1266 { 1267 struct net *net = genl_info_net(info); 1268 struct batadv_hard_iface *hard_iface; 1269 struct batadv_priv *bat_priv = NULL; 1270 struct batadv_softif_vlan *vlan; 1271 struct net_device *soft_iface; 1272 u8 user_ptr1_flags; 1273 u8 mesh_dep_flags; 1274 int ret; 1275 1276 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1277 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1)) 1278 return -EINVAL; 1279 1280 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1281 if (WARN_ON((ops->internal_flags & mesh_dep_flags) && 1282 (~ops->internal_flags & BATADV_FLAG_NEED_MESH))) 1283 return -EINVAL; 1284 1285 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) { 1286 soft_iface = batadv_get_softif_from_info(net, info); 1287 if (IS_ERR(soft_iface)) 1288 return PTR_ERR(soft_iface); 1289 1290 bat_priv = netdev_priv(soft_iface); 1291 info->user_ptr[0] = bat_priv; 1292 } 1293 1294 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) { 1295 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info); 1296 if (IS_ERR(hard_iface)) { 1297 ret = PTR_ERR(hard_iface); 1298 goto err_put_softif; 1299 } 1300 1301 info->user_ptr[1] = hard_iface; 1302 } 1303 1304 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) { 1305 vlan = batadv_get_vlan_from_info(bat_priv, net, info); 1306 if (IS_ERR(vlan)) { 1307 ret = PTR_ERR(vlan); 1308 goto err_put_softif; 1309 } 1310 1311 info->user_ptr[1] = vlan; 1312 } 1313 1314 return 0; 1315 1316 err_put_softif: 1317 if (bat_priv) 1318 dev_put(bat_priv->soft_iface); 1319 1320 return ret; 1321 } 1322 1323 /** 1324 * batadv_post_doit() - End batman-adv genl doit request 1325 * @ops: requested netlink operation 1326 * @skb: Netlink message with request data 1327 * @info: receiver information 1328 */ 1329 static void batadv_post_doit(const struct genl_ops *ops, struct sk_buff *skb, 1330 struct genl_info *info) 1331 { 1332 struct batadv_hard_iface *hard_iface; 1333 struct batadv_softif_vlan *vlan; 1334 struct batadv_priv *bat_priv; 1335 1336 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF && 1337 info->user_ptr[1]) { 1338 hard_iface = info->user_ptr[1]; 1339 1340 batadv_hardif_put(hard_iface); 1341 } 1342 1343 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) { 1344 vlan = info->user_ptr[1]; 1345 batadv_softif_vlan_put(vlan); 1346 } 1347 1348 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) { 1349 bat_priv = info->user_ptr[0]; 1350 dev_put(bat_priv->soft_iface); 1351 } 1352 } 1353 1354 static const struct genl_small_ops batadv_netlink_ops[] = { 1355 { 1356 .cmd = BATADV_CMD_GET_MESH, 1357 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1358 /* can be retrieved by unprivileged users */ 1359 .doit = batadv_netlink_get_mesh, 1360 .internal_flags = BATADV_FLAG_NEED_MESH, 1361 }, 1362 { 1363 .cmd = BATADV_CMD_TP_METER, 1364 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1365 .flags = GENL_ADMIN_PERM, 1366 .doit = batadv_netlink_tp_meter_start, 1367 .internal_flags = BATADV_FLAG_NEED_MESH, 1368 }, 1369 { 1370 .cmd = BATADV_CMD_TP_METER_CANCEL, 1371 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1372 .flags = GENL_ADMIN_PERM, 1373 .doit = batadv_netlink_tp_meter_cancel, 1374 .internal_flags = BATADV_FLAG_NEED_MESH, 1375 }, 1376 { 1377 .cmd = BATADV_CMD_GET_ROUTING_ALGOS, 1378 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1379 .flags = GENL_ADMIN_PERM, 1380 .dumpit = batadv_algo_dump, 1381 }, 1382 { 1383 .cmd = BATADV_CMD_GET_HARDIF, 1384 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1385 /* can be retrieved by unprivileged users */ 1386 .dumpit = batadv_netlink_dump_hardif, 1387 .doit = batadv_netlink_get_hardif, 1388 .internal_flags = BATADV_FLAG_NEED_MESH | 1389 BATADV_FLAG_NEED_HARDIF, 1390 }, 1391 { 1392 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, 1393 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1394 .flags = GENL_ADMIN_PERM, 1395 .dumpit = batadv_tt_local_dump, 1396 }, 1397 { 1398 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, 1399 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1400 .flags = GENL_ADMIN_PERM, 1401 .dumpit = batadv_tt_global_dump, 1402 }, 1403 { 1404 .cmd = BATADV_CMD_GET_ORIGINATORS, 1405 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1406 .flags = GENL_ADMIN_PERM, 1407 .dumpit = batadv_orig_dump, 1408 }, 1409 { 1410 .cmd = BATADV_CMD_GET_NEIGHBORS, 1411 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1412 .flags = GENL_ADMIN_PERM, 1413 .dumpit = batadv_hardif_neigh_dump, 1414 }, 1415 { 1416 .cmd = BATADV_CMD_GET_GATEWAYS, 1417 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1418 .flags = GENL_ADMIN_PERM, 1419 .dumpit = batadv_gw_dump, 1420 }, 1421 { 1422 .cmd = BATADV_CMD_GET_BLA_CLAIM, 1423 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1424 .flags = GENL_ADMIN_PERM, 1425 .dumpit = batadv_bla_claim_dump, 1426 }, 1427 { 1428 .cmd = BATADV_CMD_GET_BLA_BACKBONE, 1429 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1430 .flags = GENL_ADMIN_PERM, 1431 .dumpit = batadv_bla_backbone_dump, 1432 }, 1433 { 1434 .cmd = BATADV_CMD_GET_DAT_CACHE, 1435 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1436 .flags = GENL_ADMIN_PERM, 1437 .dumpit = batadv_dat_cache_dump, 1438 }, 1439 { 1440 .cmd = BATADV_CMD_GET_MCAST_FLAGS, 1441 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1442 .flags = GENL_ADMIN_PERM, 1443 .dumpit = batadv_mcast_flags_dump, 1444 }, 1445 { 1446 .cmd = BATADV_CMD_SET_MESH, 1447 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1448 .flags = GENL_ADMIN_PERM, 1449 .doit = batadv_netlink_set_mesh, 1450 .internal_flags = BATADV_FLAG_NEED_MESH, 1451 }, 1452 { 1453 .cmd = BATADV_CMD_SET_HARDIF, 1454 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1455 .flags = GENL_ADMIN_PERM, 1456 .doit = batadv_netlink_set_hardif, 1457 .internal_flags = BATADV_FLAG_NEED_MESH | 1458 BATADV_FLAG_NEED_HARDIF, 1459 }, 1460 { 1461 .cmd = BATADV_CMD_GET_VLAN, 1462 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1463 /* can be retrieved by unprivileged users */ 1464 .doit = batadv_netlink_get_vlan, 1465 .internal_flags = BATADV_FLAG_NEED_MESH | 1466 BATADV_FLAG_NEED_VLAN, 1467 }, 1468 { 1469 .cmd = BATADV_CMD_SET_VLAN, 1470 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1471 .flags = GENL_ADMIN_PERM, 1472 .doit = batadv_netlink_set_vlan, 1473 .internal_flags = BATADV_FLAG_NEED_MESH | 1474 BATADV_FLAG_NEED_VLAN, 1475 }, 1476 }; 1477 1478 struct genl_family batadv_netlink_family __ro_after_init = { 1479 .hdrsize = 0, 1480 .name = BATADV_NL_NAME, 1481 .version = 1, 1482 .maxattr = BATADV_ATTR_MAX, 1483 .policy = batadv_netlink_policy, 1484 .netnsok = true, 1485 .pre_doit = batadv_pre_doit, 1486 .post_doit = batadv_post_doit, 1487 .module = THIS_MODULE, 1488 .small_ops = batadv_netlink_ops, 1489 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops), 1490 .mcgrps = batadv_netlink_mcgrps, 1491 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps), 1492 }; 1493 1494 /** 1495 * batadv_netlink_register() - register batadv genl netlink family 1496 */ 1497 void __init batadv_netlink_register(void) 1498 { 1499 int ret; 1500 1501 ret = genl_register_family(&batadv_netlink_family); 1502 if (ret) 1503 pr_warn("unable to register netlink family"); 1504 } 1505 1506 /** 1507 * batadv_netlink_unregister() - unregister batadv genl netlink family 1508 */ 1509 void batadv_netlink_unregister(void) 1510 { 1511 genl_unregister_family(&batadv_netlink_family); 1512 } 1513