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 batadv_update_min_mtu(bat_priv->soft_iface); 499 } 500 501 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) { 502 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]; 503 504 atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr)); 505 batadv_gw_tvlv_container_update(bat_priv); 506 } 507 508 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) { 509 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]; 510 511 atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr)); 512 batadv_gw_tvlv_container_update(bat_priv); 513 } 514 515 if (info->attrs[BATADV_ATTR_GW_MODE]) { 516 u8 gw_mode; 517 518 attr = info->attrs[BATADV_ATTR_GW_MODE]; 519 gw_mode = nla_get_u8(attr); 520 521 if (gw_mode <= BATADV_GW_MODE_SERVER) { 522 /* Invoking batadv_gw_reselect() is not enough to really 523 * de-select the current GW. It will only instruct the 524 * gateway client code to perform a re-election the next 525 * time that this is needed. 526 * 527 * When gw client mode is being switched off the current 528 * GW must be de-selected explicitly otherwise no GW_ADD 529 * uevent is thrown on client mode re-activation. This 530 * is operation is performed in 531 * batadv_gw_check_client_stop(). 532 */ 533 batadv_gw_reselect(bat_priv); 534 535 /* always call batadv_gw_check_client_stop() before 536 * changing the gateway state 537 */ 538 batadv_gw_check_client_stop(bat_priv); 539 atomic_set(&bat_priv->gw.mode, gw_mode); 540 batadv_gw_tvlv_container_update(bat_priv); 541 } 542 } 543 544 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] && 545 bat_priv->algo_ops->gw.get_best_gw_node && 546 bat_priv->algo_ops->gw.is_eligible) { 547 /* setting the GW selection class is allowed only if the routing 548 * algorithm in use implements the GW API 549 */ 550 551 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max; 552 u32 sel_class; 553 554 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS]; 555 sel_class = nla_get_u32(attr); 556 557 if (sel_class >= 1 && sel_class <= sel_class_max) { 558 atomic_set(&bat_priv->gw.sel_class, sel_class); 559 batadv_gw_reselect(bat_priv); 560 } 561 } 562 563 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 564 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 565 566 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr)); 567 } 568 569 #ifdef CONFIG_BATMAN_ADV_DEBUG 570 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) { 571 attr = info->attrs[BATADV_ATTR_LOG_LEVEL]; 572 573 atomic_set(&bat_priv->log_level, 574 nla_get_u32(attr) & BATADV_DBG_ALL); 575 } 576 #endif /* CONFIG_BATMAN_ADV_DEBUG */ 577 578 #ifdef CONFIG_BATMAN_ADV_MCAST 579 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) { 580 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]; 581 582 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr)); 583 } 584 585 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) { 586 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT]; 587 588 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr)); 589 } 590 #endif /* CONFIG_BATMAN_ADV_MCAST */ 591 592 #ifdef CONFIG_BATMAN_ADV_NC 593 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) { 594 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]; 595 596 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr)); 597 batadv_nc_status_update(bat_priv->soft_iface); 598 } 599 #endif /* CONFIG_BATMAN_ADV_NC */ 600 601 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) { 602 u32 orig_interval; 603 604 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL]; 605 orig_interval = nla_get_u32(attr); 606 607 orig_interval = min_t(u32, orig_interval, INT_MAX); 608 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER); 609 610 atomic_set(&bat_priv->orig_interval, orig_interval); 611 } 612 613 batadv_netlink_notify_mesh(bat_priv); 614 615 return 0; 616 } 617 618 /** 619 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session 620 * @msg: netlink message to be sent back 621 * @cookie: tp meter session cookie 622 * 623 * Return: 0 on success, < 0 on error 624 */ 625 static int 626 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie) 627 { 628 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 629 return -ENOBUFS; 630 631 return 0; 632 } 633 634 /** 635 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client 636 * @bat_priv: the bat priv with all the soft interface information 637 * @dst: destination of tp_meter session 638 * @result: reason for tp meter session stop 639 * @test_time: total time of the tp_meter session 640 * @total_bytes: bytes acked to the receiver 641 * @cookie: cookie of tp_meter session 642 * 643 * Return: 0 on success, < 0 on error 644 */ 645 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, 646 u8 result, u32 test_time, u64 total_bytes, 647 u32 cookie) 648 { 649 struct sk_buff *msg; 650 void *hdr; 651 int ret; 652 653 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 654 if (!msg) 655 return -ENOMEM; 656 657 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0, 658 BATADV_CMD_TP_METER); 659 if (!hdr) { 660 ret = -ENOBUFS; 661 goto err_genlmsg; 662 } 663 664 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie)) 665 goto nla_put_failure; 666 667 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time)) 668 goto nla_put_failure; 669 670 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes, 671 BATADV_ATTR_PAD)) 672 goto nla_put_failure; 673 674 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result)) 675 goto nla_put_failure; 676 677 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst)) 678 goto nla_put_failure; 679 680 genlmsg_end(msg, hdr); 681 682 genlmsg_multicast_netns(&batadv_netlink_family, 683 dev_net(bat_priv->soft_iface), msg, 0, 684 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL); 685 686 return 0; 687 688 nla_put_failure: 689 genlmsg_cancel(msg, hdr); 690 ret = -EMSGSIZE; 691 692 err_genlmsg: 693 nlmsg_free(msg); 694 return ret; 695 } 696 697 /** 698 * batadv_netlink_tp_meter_start() - Start a new tp_meter session 699 * @skb: received netlink message 700 * @info: receiver information 701 * 702 * Return: 0 on success, < 0 on error 703 */ 704 static int 705 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info) 706 { 707 struct batadv_priv *bat_priv = info->user_ptr[0]; 708 struct sk_buff *msg = NULL; 709 u32 test_length; 710 void *msg_head; 711 u32 cookie; 712 u8 *dst; 713 int ret; 714 715 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 716 return -EINVAL; 717 718 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]) 719 return -EINVAL; 720 721 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 722 723 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]); 724 725 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 726 if (!msg) { 727 ret = -ENOMEM; 728 goto out; 729 } 730 731 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq, 732 &batadv_netlink_family, 0, 733 BATADV_CMD_TP_METER); 734 if (!msg_head) { 735 ret = -ENOBUFS; 736 goto out; 737 } 738 739 batadv_tp_start(bat_priv, dst, test_length, &cookie); 740 741 ret = batadv_netlink_tp_meter_put(msg, cookie); 742 743 out: 744 if (ret) { 745 if (msg) 746 nlmsg_free(msg); 747 return ret; 748 } 749 750 genlmsg_end(msg, msg_head); 751 return genlmsg_reply(msg, info); 752 } 753 754 /** 755 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session 756 * @skb: received netlink message 757 * @info: receiver information 758 * 759 * Return: 0 on success, < 0 on error 760 */ 761 static int 762 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info) 763 { 764 struct batadv_priv *bat_priv = info->user_ptr[0]; 765 u8 *dst; 766 int ret = 0; 767 768 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS]) 769 return -EINVAL; 770 771 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]); 772 773 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL); 774 775 return ret; 776 } 777 778 /** 779 * batadv_netlink_hardif_fill() - Fill message with hardif attributes 780 * @msg: Netlink message to dump into 781 * @bat_priv: the bat priv with all the soft interface information 782 * @hard_iface: hard interface which was modified 783 * @cmd: type of message to generate 784 * @portid: Port making netlink request 785 * @seq: sequence number for message 786 * @flags: Additional flags for message 787 * @cb: Control block containing additional options 788 * 789 * Return: 0 on success or negative error number in case of failure 790 */ 791 static int batadv_netlink_hardif_fill(struct sk_buff *msg, 792 struct batadv_priv *bat_priv, 793 struct batadv_hard_iface *hard_iface, 794 enum batadv_nl_commands cmd, 795 u32 portid, u32 seq, int flags, 796 struct netlink_callback *cb) 797 { 798 struct net_device *net_dev = hard_iface->net_dev; 799 void *hdr; 800 801 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 802 if (!hdr) 803 return -ENOBUFS; 804 805 if (cb) 806 genl_dump_check_consistent(cb, hdr); 807 808 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 809 bat_priv->soft_iface->ifindex)) 810 goto nla_put_failure; 811 812 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, 813 bat_priv->soft_iface->name)) 814 goto nla_put_failure; 815 816 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, 817 net_dev->ifindex) || 818 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, 819 net_dev->name) || 820 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, 821 net_dev->dev_addr)) 822 goto nla_put_failure; 823 824 if (hard_iface->if_status == BATADV_IF_ACTIVE) { 825 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE)) 826 goto nla_put_failure; 827 } 828 829 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY, 830 atomic_read(&hard_iface->hop_penalty))) 831 goto nla_put_failure; 832 833 #ifdef CONFIG_BATMAN_ADV_BATMAN_V 834 if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL, 835 atomic_read(&hard_iface->bat_v.elp_interval))) 836 goto nla_put_failure; 837 838 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE, 839 atomic_read(&hard_iface->bat_v.throughput_override))) 840 goto nla_put_failure; 841 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */ 842 843 genlmsg_end(msg, hdr); 844 return 0; 845 846 nla_put_failure: 847 genlmsg_cancel(msg, hdr); 848 return -EMSGSIZE; 849 } 850 851 /** 852 * batadv_netlink_notify_hardif() - send hardif attributes to listener 853 * @bat_priv: the bat priv with all the soft interface information 854 * @hard_iface: hard interface which was modified 855 * 856 * Return: 0 on success, < 0 on error 857 */ 858 static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv, 859 struct batadv_hard_iface *hard_iface) 860 { 861 struct sk_buff *msg; 862 int ret; 863 864 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 865 if (!msg) 866 return -ENOMEM; 867 868 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 869 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL); 870 if (ret < 0) { 871 nlmsg_free(msg); 872 return ret; 873 } 874 875 genlmsg_multicast_netns(&batadv_netlink_family, 876 dev_net(bat_priv->soft_iface), msg, 0, 877 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 878 879 return 0; 880 } 881 882 /** 883 * batadv_netlink_get_hardif() - Get hardif attributes 884 * @skb: Netlink message with request data 885 * @info: receiver information 886 * 887 * Return: 0 on success or negative error number in case of failure 888 */ 889 static int batadv_netlink_get_hardif(struct sk_buff *skb, 890 struct genl_info *info) 891 { 892 struct batadv_hard_iface *hard_iface = info->user_ptr[1]; 893 struct batadv_priv *bat_priv = info->user_ptr[0]; 894 struct sk_buff *msg; 895 int ret; 896 897 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 898 if (!msg) 899 return -ENOMEM; 900 901 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 902 BATADV_CMD_GET_HARDIF, 903 info->snd_portid, info->snd_seq, 0, 904 NULL); 905 if (ret < 0) { 906 nlmsg_free(msg); 907 return ret; 908 } 909 910 ret = genlmsg_reply(msg, info); 911 912 return ret; 913 } 914 915 /** 916 * batadv_netlink_set_hardif() - Set hardif attributes 917 * @skb: Netlink message with request data 918 * @info: receiver information 919 * 920 * Return: 0 on success or negative error number in case of failure 921 */ 922 static int batadv_netlink_set_hardif(struct sk_buff *skb, 923 struct genl_info *info) 924 { 925 struct batadv_hard_iface *hard_iface = info->user_ptr[1]; 926 struct batadv_priv *bat_priv = info->user_ptr[0]; 927 struct nlattr *attr; 928 929 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { 930 attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; 931 932 atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr)); 933 } 934 935 #ifdef CONFIG_BATMAN_ADV_BATMAN_V 936 937 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) { 938 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL]; 939 940 atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr)); 941 } 942 943 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) { 944 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]; 945 946 atomic_set(&hard_iface->bat_v.throughput_override, 947 nla_get_u32(attr)); 948 } 949 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */ 950 951 batadv_netlink_notify_hardif(bat_priv, hard_iface); 952 953 return 0; 954 } 955 956 /** 957 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages 958 * @msg: Netlink message to dump into 959 * @cb: Parameters from query 960 * 961 * Return: error code, or length of reply message on success 962 */ 963 static int 964 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb) 965 { 966 struct net *net = sock_net(cb->skb->sk); 967 struct net_device *soft_iface; 968 struct batadv_hard_iface *hard_iface; 969 struct batadv_priv *bat_priv; 970 int ifindex; 971 int portid = NETLINK_CB(cb->skb).portid; 972 int skip = cb->args[0]; 973 int i = 0; 974 975 ifindex = batadv_netlink_get_ifindex(cb->nlh, 976 BATADV_ATTR_MESH_IFINDEX); 977 if (!ifindex) 978 return -EINVAL; 979 980 soft_iface = dev_get_by_index(net, ifindex); 981 if (!soft_iface) 982 return -ENODEV; 983 984 if (!batadv_softif_is_valid(soft_iface)) { 985 dev_put(soft_iface); 986 return -ENODEV; 987 } 988 989 bat_priv = netdev_priv(soft_iface); 990 991 rtnl_lock(); 992 cb->seq = batadv_hardif_generation << 1 | 1; 993 994 list_for_each_entry(hard_iface, &batadv_hardif_list, list) { 995 if (hard_iface->soft_iface != soft_iface) 996 continue; 997 998 if (i++ < skip) 999 continue; 1000 1001 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface, 1002 BATADV_CMD_GET_HARDIF, 1003 portid, cb->nlh->nlmsg_seq, 1004 NLM_F_MULTI, cb)) { 1005 i--; 1006 break; 1007 } 1008 } 1009 1010 rtnl_unlock(); 1011 1012 dev_put(soft_iface); 1013 1014 cb->args[0] = i; 1015 1016 return msg->len; 1017 } 1018 1019 /** 1020 * batadv_netlink_vlan_fill() - Fill message with vlan attributes 1021 * @msg: Netlink message to dump into 1022 * @bat_priv: the bat priv with all the soft interface information 1023 * @vlan: vlan which was modified 1024 * @cmd: type of message to generate 1025 * @portid: Port making netlink request 1026 * @seq: sequence number for message 1027 * @flags: Additional flags for message 1028 * 1029 * Return: 0 on success or negative error number in case of failure 1030 */ 1031 static int batadv_netlink_vlan_fill(struct sk_buff *msg, 1032 struct batadv_priv *bat_priv, 1033 struct batadv_softif_vlan *vlan, 1034 enum batadv_nl_commands cmd, 1035 u32 portid, u32 seq, int flags) 1036 { 1037 void *hdr; 1038 1039 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd); 1040 if (!hdr) 1041 return -ENOBUFS; 1042 1043 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, 1044 bat_priv->soft_iface->ifindex)) 1045 goto nla_put_failure; 1046 1047 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, 1048 bat_priv->soft_iface->name)) 1049 goto nla_put_failure; 1050 1051 if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK)) 1052 goto nla_put_failure; 1053 1054 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED, 1055 !!atomic_read(&vlan->ap_isolation))) 1056 goto nla_put_failure; 1057 1058 genlmsg_end(msg, hdr); 1059 return 0; 1060 1061 nla_put_failure: 1062 genlmsg_cancel(msg, hdr); 1063 return -EMSGSIZE; 1064 } 1065 1066 /** 1067 * batadv_netlink_notify_vlan() - send vlan attributes to listener 1068 * @bat_priv: the bat priv with all the soft interface information 1069 * @vlan: vlan which was modified 1070 * 1071 * Return: 0 on success, < 0 on error 1072 */ 1073 static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv, 1074 struct batadv_softif_vlan *vlan) 1075 { 1076 struct sk_buff *msg; 1077 int ret; 1078 1079 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1080 if (!msg) 1081 return -ENOMEM; 1082 1083 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, 1084 BATADV_CMD_SET_VLAN, 0, 0, 0); 1085 if (ret < 0) { 1086 nlmsg_free(msg); 1087 return ret; 1088 } 1089 1090 genlmsg_multicast_netns(&batadv_netlink_family, 1091 dev_net(bat_priv->soft_iface), msg, 0, 1092 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL); 1093 1094 return 0; 1095 } 1096 1097 /** 1098 * batadv_netlink_get_vlan() - Get vlan attributes 1099 * @skb: Netlink message with request data 1100 * @info: receiver information 1101 * 1102 * Return: 0 on success or negative error number in case of failure 1103 */ 1104 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info) 1105 { 1106 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1107 struct batadv_priv *bat_priv = info->user_ptr[0]; 1108 struct sk_buff *msg; 1109 int ret; 1110 1111 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1112 if (!msg) 1113 return -ENOMEM; 1114 1115 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN, 1116 info->snd_portid, info->snd_seq, 0); 1117 if (ret < 0) { 1118 nlmsg_free(msg); 1119 return ret; 1120 } 1121 1122 ret = genlmsg_reply(msg, info); 1123 1124 return ret; 1125 } 1126 1127 /** 1128 * batadv_netlink_set_vlan() - Get vlan attributes 1129 * @skb: Netlink message with request data 1130 * @info: receiver information 1131 * 1132 * Return: 0 on success or negative error number in case of failure 1133 */ 1134 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info) 1135 { 1136 struct batadv_softif_vlan *vlan = info->user_ptr[1]; 1137 struct batadv_priv *bat_priv = info->user_ptr[0]; 1138 struct nlattr *attr; 1139 1140 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) { 1141 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]; 1142 1143 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr)); 1144 } 1145 1146 batadv_netlink_notify_vlan(bat_priv, vlan); 1147 1148 return 0; 1149 } 1150 1151 /** 1152 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes 1153 * @net: the applicable net namespace 1154 * @info: receiver information 1155 * 1156 * Return: Pointer to soft interface (with increased refcnt) on success, error 1157 * pointer on error 1158 */ 1159 static struct net_device * 1160 batadv_get_softif_from_info(struct net *net, struct genl_info *info) 1161 { 1162 struct net_device *soft_iface; 1163 int ifindex; 1164 1165 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) 1166 return ERR_PTR(-EINVAL); 1167 1168 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); 1169 1170 soft_iface = dev_get_by_index(net, ifindex); 1171 if (!soft_iface) 1172 return ERR_PTR(-ENODEV); 1173 1174 if (!batadv_softif_is_valid(soft_iface)) 1175 goto err_put_softif; 1176 1177 return soft_iface; 1178 1179 err_put_softif: 1180 dev_put(soft_iface); 1181 1182 return ERR_PTR(-EINVAL); 1183 } 1184 1185 /** 1186 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes 1187 * @bat_priv: the bat priv with all the soft interface information 1188 * @net: the applicable net namespace 1189 * @info: receiver information 1190 * 1191 * Return: Pointer to hard interface (with increased refcnt) on success, error 1192 * pointer on error 1193 */ 1194 static struct batadv_hard_iface * 1195 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net, 1196 struct genl_info *info) 1197 { 1198 struct batadv_hard_iface *hard_iface; 1199 struct net_device *hard_dev; 1200 unsigned int hardif_index; 1201 1202 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX]) 1203 return ERR_PTR(-EINVAL); 1204 1205 hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]); 1206 1207 hard_dev = dev_get_by_index(net, hardif_index); 1208 if (!hard_dev) 1209 return ERR_PTR(-ENODEV); 1210 1211 hard_iface = batadv_hardif_get_by_netdev(hard_dev); 1212 if (!hard_iface) 1213 goto err_put_harddev; 1214 1215 if (hard_iface->soft_iface != bat_priv->soft_iface) 1216 goto err_put_hardif; 1217 1218 /* hard_dev is referenced by hard_iface and not needed here */ 1219 dev_put(hard_dev); 1220 1221 return hard_iface; 1222 1223 err_put_hardif: 1224 batadv_hardif_put(hard_iface); 1225 err_put_harddev: 1226 dev_put(hard_dev); 1227 1228 return ERR_PTR(-EINVAL); 1229 } 1230 1231 /** 1232 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes 1233 * @bat_priv: the bat priv with all the soft interface information 1234 * @net: the applicable net namespace 1235 * @info: receiver information 1236 * 1237 * Return: Pointer to vlan on success (with increased refcnt), error pointer 1238 * on error 1239 */ 1240 static struct batadv_softif_vlan * 1241 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net, 1242 struct genl_info *info) 1243 { 1244 struct batadv_softif_vlan *vlan; 1245 u16 vid; 1246 1247 if (!info->attrs[BATADV_ATTR_VLANID]) 1248 return ERR_PTR(-EINVAL); 1249 1250 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]); 1251 1252 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); 1253 if (!vlan) 1254 return ERR_PTR(-ENOENT); 1255 1256 return vlan; 1257 } 1258 1259 /** 1260 * batadv_pre_doit() - Prepare batman-adv genl doit request 1261 * @ops: requested netlink operation 1262 * @skb: Netlink message with request data 1263 * @info: receiver information 1264 * 1265 * Return: 0 on success or negative error number in case of failure 1266 */ 1267 static int batadv_pre_doit(const struct genl_split_ops *ops, 1268 struct sk_buff *skb, 1269 struct genl_info *info) 1270 { 1271 struct net *net = genl_info_net(info); 1272 struct batadv_hard_iface *hard_iface; 1273 struct batadv_priv *bat_priv = NULL; 1274 struct batadv_softif_vlan *vlan; 1275 struct net_device *soft_iface; 1276 u8 user_ptr1_flags; 1277 u8 mesh_dep_flags; 1278 int ret; 1279 1280 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1281 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1)) 1282 return -EINVAL; 1283 1284 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN; 1285 if (WARN_ON((ops->internal_flags & mesh_dep_flags) && 1286 (~ops->internal_flags & BATADV_FLAG_NEED_MESH))) 1287 return -EINVAL; 1288 1289 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) { 1290 soft_iface = batadv_get_softif_from_info(net, info); 1291 if (IS_ERR(soft_iface)) 1292 return PTR_ERR(soft_iface); 1293 1294 bat_priv = netdev_priv(soft_iface); 1295 info->user_ptr[0] = bat_priv; 1296 } 1297 1298 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) { 1299 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info); 1300 if (IS_ERR(hard_iface)) { 1301 ret = PTR_ERR(hard_iface); 1302 goto err_put_softif; 1303 } 1304 1305 info->user_ptr[1] = hard_iface; 1306 } 1307 1308 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) { 1309 vlan = batadv_get_vlan_from_info(bat_priv, net, info); 1310 if (IS_ERR(vlan)) { 1311 ret = PTR_ERR(vlan); 1312 goto err_put_softif; 1313 } 1314 1315 info->user_ptr[1] = vlan; 1316 } 1317 1318 return 0; 1319 1320 err_put_softif: 1321 if (bat_priv) 1322 dev_put(bat_priv->soft_iface); 1323 1324 return ret; 1325 } 1326 1327 /** 1328 * batadv_post_doit() - End batman-adv genl doit request 1329 * @ops: requested netlink operation 1330 * @skb: Netlink message with request data 1331 * @info: receiver information 1332 */ 1333 static void batadv_post_doit(const struct genl_split_ops *ops, 1334 struct sk_buff *skb, 1335 struct genl_info *info) 1336 { 1337 struct batadv_hard_iface *hard_iface; 1338 struct batadv_softif_vlan *vlan; 1339 struct batadv_priv *bat_priv; 1340 1341 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF && 1342 info->user_ptr[1]) { 1343 hard_iface = info->user_ptr[1]; 1344 1345 batadv_hardif_put(hard_iface); 1346 } 1347 1348 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) { 1349 vlan = info->user_ptr[1]; 1350 batadv_softif_vlan_put(vlan); 1351 } 1352 1353 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) { 1354 bat_priv = info->user_ptr[0]; 1355 dev_put(bat_priv->soft_iface); 1356 } 1357 } 1358 1359 static const struct genl_small_ops batadv_netlink_ops[] = { 1360 { 1361 .cmd = BATADV_CMD_GET_MESH, 1362 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1363 /* can be retrieved by unprivileged users */ 1364 .doit = batadv_netlink_get_mesh, 1365 .internal_flags = BATADV_FLAG_NEED_MESH, 1366 }, 1367 { 1368 .cmd = BATADV_CMD_TP_METER, 1369 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1370 .flags = GENL_UNS_ADMIN_PERM, 1371 .doit = batadv_netlink_tp_meter_start, 1372 .internal_flags = BATADV_FLAG_NEED_MESH, 1373 }, 1374 { 1375 .cmd = BATADV_CMD_TP_METER_CANCEL, 1376 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1377 .flags = GENL_UNS_ADMIN_PERM, 1378 .doit = batadv_netlink_tp_meter_cancel, 1379 .internal_flags = BATADV_FLAG_NEED_MESH, 1380 }, 1381 { 1382 .cmd = BATADV_CMD_GET_ROUTING_ALGOS, 1383 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1384 .flags = GENL_UNS_ADMIN_PERM, 1385 .dumpit = batadv_algo_dump, 1386 }, 1387 { 1388 .cmd = BATADV_CMD_GET_HARDIF, 1389 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1390 /* can be retrieved by unprivileged users */ 1391 .dumpit = batadv_netlink_dump_hardif, 1392 .doit = batadv_netlink_get_hardif, 1393 .internal_flags = BATADV_FLAG_NEED_MESH | 1394 BATADV_FLAG_NEED_HARDIF, 1395 }, 1396 { 1397 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, 1398 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1399 .flags = GENL_UNS_ADMIN_PERM, 1400 .dumpit = batadv_tt_local_dump, 1401 }, 1402 { 1403 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, 1404 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1405 .flags = GENL_UNS_ADMIN_PERM, 1406 .dumpit = batadv_tt_global_dump, 1407 }, 1408 { 1409 .cmd = BATADV_CMD_GET_ORIGINATORS, 1410 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1411 .flags = GENL_UNS_ADMIN_PERM, 1412 .dumpit = batadv_orig_dump, 1413 }, 1414 { 1415 .cmd = BATADV_CMD_GET_NEIGHBORS, 1416 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1417 .flags = GENL_UNS_ADMIN_PERM, 1418 .dumpit = batadv_hardif_neigh_dump, 1419 }, 1420 { 1421 .cmd = BATADV_CMD_GET_GATEWAYS, 1422 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1423 .flags = GENL_UNS_ADMIN_PERM, 1424 .dumpit = batadv_gw_dump, 1425 }, 1426 { 1427 .cmd = BATADV_CMD_GET_BLA_CLAIM, 1428 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1429 .flags = GENL_UNS_ADMIN_PERM, 1430 .dumpit = batadv_bla_claim_dump, 1431 }, 1432 { 1433 .cmd = BATADV_CMD_GET_BLA_BACKBONE, 1434 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1435 .flags = GENL_UNS_ADMIN_PERM, 1436 .dumpit = batadv_bla_backbone_dump, 1437 }, 1438 { 1439 .cmd = BATADV_CMD_GET_DAT_CACHE, 1440 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1441 .flags = GENL_UNS_ADMIN_PERM, 1442 .dumpit = batadv_dat_cache_dump, 1443 }, 1444 { 1445 .cmd = BATADV_CMD_GET_MCAST_FLAGS, 1446 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1447 .flags = GENL_UNS_ADMIN_PERM, 1448 .dumpit = batadv_mcast_flags_dump, 1449 }, 1450 { 1451 .cmd = BATADV_CMD_SET_MESH, 1452 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1453 .flags = GENL_UNS_ADMIN_PERM, 1454 .doit = batadv_netlink_set_mesh, 1455 .internal_flags = BATADV_FLAG_NEED_MESH, 1456 }, 1457 { 1458 .cmd = BATADV_CMD_SET_HARDIF, 1459 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1460 .flags = GENL_UNS_ADMIN_PERM, 1461 .doit = batadv_netlink_set_hardif, 1462 .internal_flags = BATADV_FLAG_NEED_MESH | 1463 BATADV_FLAG_NEED_HARDIF, 1464 }, 1465 { 1466 .cmd = BATADV_CMD_GET_VLAN, 1467 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1468 /* can be retrieved by unprivileged users */ 1469 .doit = batadv_netlink_get_vlan, 1470 .internal_flags = BATADV_FLAG_NEED_MESH | 1471 BATADV_FLAG_NEED_VLAN, 1472 }, 1473 { 1474 .cmd = BATADV_CMD_SET_VLAN, 1475 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1476 .flags = GENL_UNS_ADMIN_PERM, 1477 .doit = batadv_netlink_set_vlan, 1478 .internal_flags = BATADV_FLAG_NEED_MESH | 1479 BATADV_FLAG_NEED_VLAN, 1480 }, 1481 }; 1482 1483 struct genl_family batadv_netlink_family __ro_after_init = { 1484 .hdrsize = 0, 1485 .name = BATADV_NL_NAME, 1486 .version = 1, 1487 .maxattr = BATADV_ATTR_MAX, 1488 .policy = batadv_netlink_policy, 1489 .netnsok = true, 1490 .pre_doit = batadv_pre_doit, 1491 .post_doit = batadv_post_doit, 1492 .module = THIS_MODULE, 1493 .small_ops = batadv_netlink_ops, 1494 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops), 1495 .resv_start_op = BATADV_CMD_SET_VLAN + 1, 1496 .mcgrps = batadv_netlink_mcgrps, 1497 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps), 1498 }; 1499 1500 /** 1501 * batadv_netlink_register() - register batadv genl netlink family 1502 */ 1503 void __init batadv_netlink_register(void) 1504 { 1505 int ret; 1506 1507 ret = genl_register_family(&batadv_netlink_family); 1508 if (ret) 1509 pr_warn("unable to register netlink family"); 1510 } 1511 1512 /** 1513 * batadv_netlink_unregister() - unregister batadv genl netlink family 1514 */ 1515 void batadv_netlink_unregister(void) 1516 { 1517 genl_unregister_family(&batadv_netlink_family); 1518 } 1519