1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 3 #ifndef _LINUX_DROPREASON_CORE_H 4 #define _LINUX_DROPREASON_CORE_H 5 6 #define DEFINE_DROP_REASON(FN, FNe) \ 7 FN(NOT_SPECIFIED) \ 8 FN(NO_SOCKET) \ 9 FN(SOCKET_CLOSE) \ 10 FN(SOCKET_FILTER) \ 11 FN(SOCKET_RCVBUFF) \ 12 FN(UNIX_DISCONNECT) \ 13 FN(UNIX_SKIP_OOB) \ 14 FN(PKT_TOO_SMALL) \ 15 FN(TCP_CSUM) \ 16 FN(UDP_CSUM) \ 17 FN(NETFILTER_DROP) \ 18 FN(OTHERHOST) \ 19 FN(IP_CSUM) \ 20 FN(IP_INHDR) \ 21 FN(IP_RPFILTER) \ 22 FN(UNICAST_IN_L2_MULTICAST) \ 23 FN(XFRM_POLICY) \ 24 FN(IP_NOPROTO) \ 25 FN(PROTO_MEM) \ 26 FN(TCP_AUTH_HDR) \ 27 FN(TCP_MD5NOTFOUND) \ 28 FN(TCP_MD5UNEXPECTED) \ 29 FN(TCP_MD5FAILURE) \ 30 FN(TCP_AONOTFOUND) \ 31 FN(TCP_AOUNEXPECTED) \ 32 FN(TCP_AOKEYNOTFOUND) \ 33 FN(TCP_AOFAILURE) \ 34 FN(SOCKET_BACKLOG) \ 35 FN(TCP_FLAGS) \ 36 FN(TCP_ABORT_ON_DATA) \ 37 FN(TCP_ZEROWINDOW) \ 38 FN(TCP_OLD_DATA) \ 39 FN(TCP_OVERWINDOW) \ 40 FN(TCP_OFOMERGE) \ 41 FN(TCP_RFC7323_PAWS) \ 42 FN(TCP_RFC7323_PAWS_ACK) \ 43 FN(TCP_RFC7323_TSECR) \ 44 FN(TCP_LISTEN_OVERFLOW) \ 45 FN(TCP_OLD_SEQUENCE) \ 46 FN(TCP_INVALID_SEQUENCE) \ 47 FN(TCP_INVALID_ACK_SEQUENCE) \ 48 FN(TCP_RESET) \ 49 FN(TCP_INVALID_SYN) \ 50 FN(TCP_CLOSE) \ 51 FN(TCP_FASTOPEN) \ 52 FN(TCP_OLD_ACK) \ 53 FN(TCP_TOO_OLD_ACK) \ 54 FN(TCP_ACK_UNSENT_DATA) \ 55 FN(TCP_OFO_QUEUE_PRUNE) \ 56 FN(TCP_OFO_DROP) \ 57 FN(IP_OUTNOROUTES) \ 58 FN(BPF_CGROUP_EGRESS) \ 59 FN(IPV6DISABLED) \ 60 FN(NEIGH_CREATEFAIL) \ 61 FN(NEIGH_FAILED) \ 62 FN(NEIGH_QUEUEFULL) \ 63 FN(NEIGH_DEAD) \ 64 FN(TC_EGRESS) \ 65 FN(SECURITY_HOOK) \ 66 FN(QDISC_DROP) \ 67 FN(QDISC_OVERLIMIT) \ 68 FN(QDISC_CONGESTED) \ 69 FN(CAKE_FLOOD) \ 70 FN(FQ_BAND_LIMIT) \ 71 FN(FQ_HORIZON_LIMIT) \ 72 FN(FQ_FLOW_LIMIT) \ 73 FN(CPU_BACKLOG) \ 74 FN(XDP) \ 75 FN(TC_INGRESS) \ 76 FN(UNHANDLED_PROTO) \ 77 FN(SKB_CSUM) \ 78 FN(SKB_GSO_SEG) \ 79 FN(SKB_UCOPY_FAULT) \ 80 FN(DEV_HDR) \ 81 FN(DEV_READY) \ 82 FN(FULL_RING) \ 83 FN(NOMEM) \ 84 FN(HDR_TRUNC) \ 85 FN(TAP_FILTER) \ 86 FN(TAP_TXFILTER) \ 87 FN(ICMP_CSUM) \ 88 FN(INVALID_PROTO) \ 89 FN(IP_INADDRERRORS) \ 90 FN(IP_INNOROUTES) \ 91 FN(IP_LOCAL_SOURCE) \ 92 FN(IP_INVALID_SOURCE) \ 93 FN(IP_LOCALNET) \ 94 FN(IP_INVALID_DEST) \ 95 FN(PKT_TOO_BIG) \ 96 FN(DUP_FRAG) \ 97 FN(FRAG_REASM_TIMEOUT) \ 98 FN(FRAG_TOO_FAR) \ 99 FN(TCP_MINTTL) \ 100 FN(IPV6_BAD_EXTHDR) \ 101 FN(IPV6_NDISC_FRAG) \ 102 FN(IPV6_NDISC_HOP_LIMIT) \ 103 FN(IPV6_NDISC_BAD_CODE) \ 104 FN(IPV6_NDISC_BAD_OPTIONS) \ 105 FN(IPV6_NDISC_NS_OTHERHOST) \ 106 FN(QUEUE_PURGE) \ 107 FN(TC_COOKIE_ERROR) \ 108 FN(PACKET_SOCK_ERROR) \ 109 FN(TC_CHAIN_NOTFOUND) \ 110 FN(TC_RECLASSIFY_LOOP) \ 111 FN(VXLAN_INVALID_HDR) \ 112 FN(VXLAN_VNI_NOT_FOUND) \ 113 FN(MAC_INVALID_SOURCE) \ 114 FN(VXLAN_ENTRY_EXISTS) \ 115 FN(NO_TX_TARGET) \ 116 FN(IP_TUNNEL_ECN) \ 117 FN(TUNNEL_TXINFO) \ 118 FN(LOCAL_MAC) \ 119 FN(ARP_PVLAN_DISABLE) \ 120 FN(MAC_IEEE_MAC_CONTROL) \ 121 FN(BRIDGE_INGRESS_STP_STATE) \ 122 FNe(MAX) 123 124 /** 125 * enum skb_drop_reason - the reasons of skb drops 126 * 127 * The reason of skb drop, which is used in kfree_skb_reason(). 128 */ 129 enum skb_drop_reason { 130 /** 131 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 132 */ 133 SKB_NOT_DROPPED_YET = 0, 134 /** @SKB_CONSUMED: packet has been consumed */ 135 SKB_CONSUMED, 136 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 137 SKB_DROP_REASON_NOT_SPECIFIED, 138 /** 139 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 140 * Reason could be one of three cases: 141 * 1) no established/listening socket found during lookup process 142 * 2) no valid request socket during 3WHS process 143 * 3) no valid child socket during 3WHS process 144 */ 145 SKB_DROP_REASON_NO_SOCKET, 146 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 147 SKB_DROP_REASON_SOCKET_CLOSE, 148 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 149 SKB_DROP_REASON_SOCKET_FILTER, 150 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 151 SKB_DROP_REASON_SOCKET_RCVBUFF, 152 /** 153 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 154 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 155 * during send() that the peer has been close()d. 156 */ 157 SKB_DROP_REASON_UNIX_DISCONNECT, 158 /** 159 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 160 * recv() without MSG_OOB so dropped. 161 */ 162 SKB_DROP_REASON_UNIX_SKIP_OOB, 163 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 164 SKB_DROP_REASON_PKT_TOO_SMALL, 165 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 166 SKB_DROP_REASON_TCP_CSUM, 167 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 168 SKB_DROP_REASON_UDP_CSUM, 169 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 170 SKB_DROP_REASON_NETFILTER_DROP, 171 /** 172 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 173 * (interface is in promisc mode) 174 */ 175 SKB_DROP_REASON_OTHERHOST, 176 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 177 SKB_DROP_REASON_IP_CSUM, 178 /** 179 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 180 * IPSTATS_MIB_INHDRERRORS) 181 */ 182 SKB_DROP_REASON_IP_INHDR, 183 /** 184 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 185 * document for rp_filter in ip-sysctl.rst for more information 186 */ 187 SKB_DROP_REASON_IP_RPFILTER, 188 /** 189 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 190 * multicast, but L3 is unicast. 191 */ 192 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 193 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 194 SKB_DROP_REASON_XFRM_POLICY, 195 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 196 SKB_DROP_REASON_IP_NOPROTO, 197 /** 198 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 199 * udp packet drop out of udp_memory_allocated. 200 */ 201 SKB_DROP_REASON_PROTO_MEM, 202 /** 203 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 204 * twice or set incorrectly. 205 */ 206 SKB_DROP_REASON_TCP_AUTH_HDR, 207 /** 208 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 209 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 210 */ 211 SKB_DROP_REASON_TCP_MD5NOTFOUND, 212 /** 213 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 214 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 215 */ 216 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 217 /** 218 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 219 * to LINUX_MIB_TCPMD5FAILURE 220 */ 221 SKB_DROP_REASON_TCP_MD5FAILURE, 222 /** 223 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 224 * corresponding to LINUX_MIB_TCPAOREQUIRED 225 */ 226 SKB_DROP_REASON_TCP_AONOTFOUND, 227 /** 228 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 229 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 230 */ 231 SKB_DROP_REASON_TCP_AOUNEXPECTED, 232 /** 233 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 234 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 235 */ 236 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 237 /** 238 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 239 * corresponding to LINUX_MIB_TCPAOBAD 240 */ 241 SKB_DROP_REASON_TCP_AOFAILURE, 242 /** 243 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 244 * see LINUX_MIB_TCPBACKLOGDROP) 245 */ 246 SKB_DROP_REASON_SOCKET_BACKLOG, 247 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 248 SKB_DROP_REASON_TCP_FLAGS, 249 /** 250 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 251 * LINUX_MIB_TCPABORTONDATA 252 */ 253 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 254 /** 255 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 256 * see LINUX_MIB_TCPZEROWINDOWDROP 257 */ 258 SKB_DROP_REASON_TCP_ZEROWINDOW, 259 /** 260 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 261 * received before (spurious retrans may happened), see 262 * LINUX_MIB_DELAYEDACKLOST 263 */ 264 SKB_DROP_REASON_TCP_OLD_DATA, 265 /** 266 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 267 * the seq of the first byte exceed the right edges of receive 268 * window 269 */ 270 SKB_DROP_REASON_TCP_OVERWINDOW, 271 /** 272 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 273 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 274 */ 275 SKB_DROP_REASON_TCP_OFOMERGE, 276 /** 277 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 278 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 279 */ 280 SKB_DROP_REASON_TCP_RFC7323_PAWS, 281 /** 282 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 283 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 284 */ 285 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 286 /** 287 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 288 * Corresponds to LINUX_MIB_TSECRREJECTED. 289 */ 290 SKB_DROP_REASON_TCP_RFC7323_TSECR, 291 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 292 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 293 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 294 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 295 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */ 296 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 297 /** 298 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 299 * field because ack sequence is not in the window between snd_una 300 * and snd_nxt 301 */ 302 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 303 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 304 SKB_DROP_REASON_TCP_RESET, 305 /** 306 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 307 * SYN flag 308 */ 309 SKB_DROP_REASON_TCP_INVALID_SYN, 310 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 311 SKB_DROP_REASON_TCP_CLOSE, 312 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 313 SKB_DROP_REASON_TCP_FASTOPEN, 314 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 315 SKB_DROP_REASON_TCP_OLD_ACK, 316 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 317 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 318 /** 319 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 320 * sent yet 321 */ 322 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 323 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 324 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 325 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 326 SKB_DROP_REASON_TCP_OFO_DROP, 327 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 328 SKB_DROP_REASON_IP_OUTNOROUTES, 329 /** 330 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 331 * eBPF program 332 */ 333 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 334 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 335 SKB_DROP_REASON_IPV6DISABLED, 336 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 337 SKB_DROP_REASON_NEIGH_CREATEFAIL, 338 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 339 SKB_DROP_REASON_NEIGH_FAILED, 340 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 341 SKB_DROP_REASON_NEIGH_QUEUEFULL, 342 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 343 SKB_DROP_REASON_NEIGH_DEAD, 344 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 345 SKB_DROP_REASON_TC_EGRESS, 346 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 347 SKB_DROP_REASON_SECURITY_HOOK, 348 /** 349 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 350 * failed to enqueue to current qdisc) 351 */ 352 SKB_DROP_REASON_QDISC_DROP, 353 /** 354 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc 355 * instance exceeds its total buffer size limit. 356 */ 357 SKB_DROP_REASON_QDISC_OVERLIMIT, 358 /** 359 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm 360 * due to congestion. 361 */ 362 SKB_DROP_REASON_QDISC_CONGESTED, 363 /** 364 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of 365 * CAKE qdisc AQM algorithm (BLUE). 366 */ 367 SKB_DROP_REASON_CAKE_FLOOD, 368 /** 369 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band 370 * limit is reached. 371 */ 372 SKB_DROP_REASON_FQ_BAND_LIMIT, 373 /** 374 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet 375 * timestamp is too far in the future. 376 */ 377 SKB_DROP_REASON_FQ_HORIZON_LIMIT, 378 /** 379 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow 380 * exceeds its limits. 381 */ 382 SKB_DROP_REASON_FQ_FLOW_LIMIT, 383 /** 384 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 385 * backlog queue. This can be caused by backlog queue full (see 386 * netdev_max_backlog in net.rst) or RPS flow limit 387 */ 388 SKB_DROP_REASON_CPU_BACKLOG, 389 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 390 SKB_DROP_REASON_XDP, 391 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 392 SKB_DROP_REASON_TC_INGRESS, 393 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 394 SKB_DROP_REASON_UNHANDLED_PROTO, 395 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 396 SKB_DROP_REASON_SKB_CSUM, 397 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 398 SKB_DROP_REASON_SKB_GSO_SEG, 399 /** 400 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 401 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 402 */ 403 SKB_DROP_REASON_SKB_UCOPY_FAULT, 404 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 405 SKB_DROP_REASON_DEV_HDR, 406 /** 407 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 408 * any of its data structure that is not up/ready/initialized, 409 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 410 * is not initialized 411 */ 412 SKB_DROP_REASON_DEV_READY, 413 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 414 SKB_DROP_REASON_FULL_RING, 415 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 416 SKB_DROP_REASON_NOMEM, 417 /** 418 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 419 * networking data, e.g., failed to pull the protocol header from 420 * frags via pskb_may_pull() 421 */ 422 SKB_DROP_REASON_HDR_TRUNC, 423 /** 424 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 425 * to tun/tap, e.g., via TUNSETFILTEREBPF 426 */ 427 SKB_DROP_REASON_TAP_FILTER, 428 /** 429 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 430 * tun/tap, e.g., check_filter() 431 */ 432 SKB_DROP_REASON_TAP_TXFILTER, 433 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 434 SKB_DROP_REASON_ICMP_CSUM, 435 /** 436 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 437 * such as a broadcasts ICMP_TIMESTAMP 438 */ 439 SKB_DROP_REASON_INVALID_PROTO, 440 /** 441 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 442 * IPSTATS_MIB_INADDRERRORS 443 */ 444 SKB_DROP_REASON_IP_INADDRERRORS, 445 /** 446 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 447 * IPSTATS_MIB_INADDRERRORS 448 */ 449 SKB_DROP_REASON_IP_INNOROUTES, 450 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 451 SKB_DROP_REASON_IP_LOCAL_SOURCE, 452 /** 453 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 454 * 1) source ip is multicast or limited broadcast 455 * 2) source ip is zero and not IGMP 456 */ 457 SKB_DROP_REASON_IP_INVALID_SOURCE, 458 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 459 SKB_DROP_REASON_IP_LOCALNET, 460 /** 461 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 462 * 1) dest ip is 0 463 */ 464 SKB_DROP_REASON_IP_INVALID_DEST, 465 /** 466 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 467 * MTU) 468 */ 469 SKB_DROP_REASON_PKT_TOO_BIG, 470 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 471 SKB_DROP_REASON_DUP_FRAG, 472 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 473 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 474 /** 475 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 476 * (/proc/sys/net/ipv4/ipfrag_max_dist) 477 */ 478 SKB_DROP_REASON_FRAG_TOO_FAR, 479 /** 480 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 481 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 482 */ 483 SKB_DROP_REASON_TCP_MINTTL, 484 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 485 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 486 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 487 SKB_DROP_REASON_IPV6_NDISC_FRAG, 488 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 489 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 490 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 491 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 492 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 493 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 494 /** 495 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 496 * for another host. 497 */ 498 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 499 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 500 SKB_DROP_REASON_QUEUE_PURGE, 501 /** 502 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 503 * processing a tc ext cookie. 504 */ 505 SKB_DROP_REASON_TC_COOKIE_ERROR, 506 /** 507 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 508 * after its filter matches an incoming packet. 509 */ 510 SKB_DROP_REASON_PACKET_SOCK_ERROR, 511 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 512 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 513 /** 514 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 515 * iterations. 516 */ 517 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 518 /** 519 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 520 * 1) reserved fields are not zero 521 * 2) "I" flag is not set 522 */ 523 SKB_DROP_REASON_VXLAN_INVALID_HDR, 524 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 525 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 526 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 527 SKB_DROP_REASON_MAC_INVALID_SOURCE, 528 /** 529 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 530 * entry or an entry pointing to a nexthop. 531 */ 532 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 533 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 534 SKB_DROP_REASON_NO_TX_TARGET, 535 /** 536 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 537 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 538 */ 539 SKB_DROP_REASON_IP_TUNNEL_ECN, 540 /** 541 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 542 * reached a device which is in "external" mode. 543 */ 544 SKB_DROP_REASON_TUNNEL_TXINFO, 545 /** 546 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 547 * the MAC address of the local netdev. 548 */ 549 SKB_DROP_REASON_LOCAL_MAC, 550 /** 551 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 552 * forwarded to the in_dev, and the proxy_arp_pvlan is not 553 * enabled. 554 */ 555 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 556 /** 557 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 558 * is an IEEE MAC Control address. 559 */ 560 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 561 /** 562 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 563 * ingress bridge port does not allow frames to be forwarded. 564 */ 565 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 566 /** 567 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 568 * shouldn't be used as a real 'reason' - only for tracing code gen 569 */ 570 SKB_DROP_REASON_MAX, 571 572 /** 573 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 574 * see &enum skb_drop_reason_subsys 575 */ 576 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 577 }; 578 579 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 580 581 #define SKB_DR_INIT(name, reason) \ 582 enum skb_drop_reason name = SKB_DROP_REASON_##reason 583 #define SKB_DR(name) \ 584 SKB_DR_INIT(name, NOT_SPECIFIED) 585 #define SKB_DR_SET(name, reason) \ 586 (name = SKB_DROP_REASON_##reason) 587 #define SKB_DR_OR(name, reason) \ 588 do { \ 589 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 590 name == SKB_NOT_DROPPED_YET) \ 591 SKB_DR_SET(name, reason); \ 592 } while (0) 593 594 #endif 595