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_TW_PAWS) \ 44 FN(TCP_RFC7323_TSECR) \ 45 FN(TCP_LISTEN_OVERFLOW) \ 46 FN(TCP_OLD_SEQUENCE) \ 47 FN(TCP_INVALID_SEQUENCE) \ 48 FN(TCP_INVALID_ACK_SEQUENCE) \ 49 FN(TCP_RESET) \ 50 FN(TCP_INVALID_SYN) \ 51 FN(TCP_CLOSE) \ 52 FN(TCP_FASTOPEN) \ 53 FN(TCP_OLD_ACK) \ 54 FN(TCP_TOO_OLD_ACK) \ 55 FN(TCP_ACK_UNSENT_DATA) \ 56 FN(TCP_OFO_QUEUE_PRUNE) \ 57 FN(TCP_OFO_DROP) \ 58 FN(IP_OUTNOROUTES) \ 59 FN(BPF_CGROUP_EGRESS) \ 60 FN(IPV6DISABLED) \ 61 FN(NEIGH_CREATEFAIL) \ 62 FN(NEIGH_FAILED) \ 63 FN(NEIGH_QUEUEFULL) \ 64 FN(NEIGH_DEAD) \ 65 FN(NEIGH_HH_FILLFAIL) \ 66 FN(TC_EGRESS) \ 67 FN(SECURITY_HOOK) \ 68 FN(QDISC_DROP) \ 69 FN(QDISC_OVERLIMIT) \ 70 FN(QDISC_CONGESTED) \ 71 FN(CAKE_FLOOD) \ 72 FN(FQ_BAND_LIMIT) \ 73 FN(FQ_HORIZON_LIMIT) \ 74 FN(FQ_FLOW_LIMIT) \ 75 FN(CPU_BACKLOG) \ 76 FN(XDP) \ 77 FN(TC_INGRESS) \ 78 FN(UNHANDLED_PROTO) \ 79 FN(SKB_CSUM) \ 80 FN(SKB_GSO_SEG) \ 81 FN(SKB_UCOPY_FAULT) \ 82 FN(DEV_HDR) \ 83 FN(DEV_READY) \ 84 FN(FULL_RING) \ 85 FN(NOMEM) \ 86 FN(HDR_TRUNC) \ 87 FN(TAP_FILTER) \ 88 FN(TAP_TXFILTER) \ 89 FN(ICMP_CSUM) \ 90 FN(INVALID_PROTO) \ 91 FN(IP_INADDRERRORS) \ 92 FN(IP_INNOROUTES) \ 93 FN(IP_LOCAL_SOURCE) \ 94 FN(IP_INVALID_SOURCE) \ 95 FN(IP_LOCALNET) \ 96 FN(IP_INVALID_DEST) \ 97 FN(PKT_TOO_BIG) \ 98 FN(DUP_FRAG) \ 99 FN(FRAG_REASM_TIMEOUT) \ 100 FN(FRAG_TOO_FAR) \ 101 FN(TCP_MINTTL) \ 102 FN(IPV6_BAD_EXTHDR) \ 103 FN(IPV6_NDISC_FRAG) \ 104 FN(IPV6_NDISC_HOP_LIMIT) \ 105 FN(IPV6_NDISC_BAD_CODE) \ 106 FN(IPV6_NDISC_BAD_OPTIONS) \ 107 FN(IPV6_NDISC_NS_OTHERHOST) \ 108 FN(QUEUE_PURGE) \ 109 FN(TC_COOKIE_ERROR) \ 110 FN(PACKET_SOCK_ERROR) \ 111 FN(TC_CHAIN_NOTFOUND) \ 112 FN(TC_RECLASSIFY_LOOP) \ 113 FN(VXLAN_INVALID_HDR) \ 114 FN(VXLAN_VNI_NOT_FOUND) \ 115 FN(MAC_INVALID_SOURCE) \ 116 FN(VXLAN_ENTRY_EXISTS) \ 117 FN(NO_TX_TARGET) \ 118 FN(IP_TUNNEL_ECN) \ 119 FN(TUNNEL_TXINFO) \ 120 FN(LOCAL_MAC) \ 121 FN(ARP_PVLAN_DISABLE) \ 122 FN(MAC_IEEE_MAC_CONTROL) \ 123 FN(BRIDGE_INGRESS_STP_STATE) \ 124 FNe(MAX) 125 126 /** 127 * enum skb_drop_reason - the reasons of skb drops 128 * 129 * The reason of skb drop, which is used in kfree_skb_reason(). 130 */ 131 enum skb_drop_reason { 132 /** 133 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 134 */ 135 SKB_NOT_DROPPED_YET = 0, 136 /** @SKB_CONSUMED: packet has been consumed */ 137 SKB_CONSUMED, 138 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 139 SKB_DROP_REASON_NOT_SPECIFIED, 140 /** 141 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 142 * Reason could be one of three cases: 143 * 1) no established/listening socket found during lookup process 144 * 2) no valid request socket during 3WHS process 145 * 3) no valid child socket during 3WHS process 146 */ 147 SKB_DROP_REASON_NO_SOCKET, 148 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 149 SKB_DROP_REASON_SOCKET_CLOSE, 150 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 151 SKB_DROP_REASON_SOCKET_FILTER, 152 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 153 SKB_DROP_REASON_SOCKET_RCVBUFF, 154 /** 155 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 156 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 157 * during send() that the peer has been close()d. 158 */ 159 SKB_DROP_REASON_UNIX_DISCONNECT, 160 /** 161 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 162 * recv() without MSG_OOB so dropped. 163 */ 164 SKB_DROP_REASON_UNIX_SKIP_OOB, 165 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 166 SKB_DROP_REASON_PKT_TOO_SMALL, 167 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 168 SKB_DROP_REASON_TCP_CSUM, 169 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 170 SKB_DROP_REASON_UDP_CSUM, 171 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 172 SKB_DROP_REASON_NETFILTER_DROP, 173 /** 174 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 175 * (interface is in promisc mode) 176 */ 177 SKB_DROP_REASON_OTHERHOST, 178 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 179 SKB_DROP_REASON_IP_CSUM, 180 /** 181 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 182 * IPSTATS_MIB_INHDRERRORS) 183 */ 184 SKB_DROP_REASON_IP_INHDR, 185 /** 186 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 187 * document for rp_filter in ip-sysctl.rst for more information 188 */ 189 SKB_DROP_REASON_IP_RPFILTER, 190 /** 191 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 192 * multicast, but L3 is unicast. 193 */ 194 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 195 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 196 SKB_DROP_REASON_XFRM_POLICY, 197 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 198 SKB_DROP_REASON_IP_NOPROTO, 199 /** 200 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 201 * udp packet drop out of udp_memory_allocated. 202 */ 203 SKB_DROP_REASON_PROTO_MEM, 204 /** 205 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 206 * twice or set incorrectly. 207 */ 208 SKB_DROP_REASON_TCP_AUTH_HDR, 209 /** 210 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 211 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 212 */ 213 SKB_DROP_REASON_TCP_MD5NOTFOUND, 214 /** 215 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 216 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 217 */ 218 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 219 /** 220 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 221 * to LINUX_MIB_TCPMD5FAILURE 222 */ 223 SKB_DROP_REASON_TCP_MD5FAILURE, 224 /** 225 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 226 * corresponding to LINUX_MIB_TCPAOREQUIRED 227 */ 228 SKB_DROP_REASON_TCP_AONOTFOUND, 229 /** 230 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 231 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 232 */ 233 SKB_DROP_REASON_TCP_AOUNEXPECTED, 234 /** 235 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 236 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 237 */ 238 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 239 /** 240 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 241 * corresponding to LINUX_MIB_TCPAOBAD 242 */ 243 SKB_DROP_REASON_TCP_AOFAILURE, 244 /** 245 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 246 * see LINUX_MIB_TCPBACKLOGDROP) 247 */ 248 SKB_DROP_REASON_SOCKET_BACKLOG, 249 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 250 SKB_DROP_REASON_TCP_FLAGS, 251 /** 252 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 253 * LINUX_MIB_TCPABORTONDATA 254 */ 255 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 256 /** 257 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 258 * see LINUX_MIB_TCPZEROWINDOWDROP 259 */ 260 SKB_DROP_REASON_TCP_ZEROWINDOW, 261 /** 262 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 263 * received before (spurious retrans may happened), see 264 * LINUX_MIB_DELAYEDACKLOST 265 */ 266 SKB_DROP_REASON_TCP_OLD_DATA, 267 /** 268 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 269 * the seq of the first byte exceed the right edges of receive 270 * window 271 */ 272 SKB_DROP_REASON_TCP_OVERWINDOW, 273 /** 274 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 275 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 276 */ 277 SKB_DROP_REASON_TCP_OFOMERGE, 278 /** 279 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 280 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 281 */ 282 SKB_DROP_REASON_TCP_RFC7323_PAWS, 283 /** 284 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 285 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 286 */ 287 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 288 /** 289 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 290 * TIME_WAIT state. 291 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 292 */ 293 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 294 /** 295 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 296 * Corresponds to LINUX_MIB_TSECRREJECTED. 297 */ 298 SKB_DROP_REASON_TCP_RFC7323_TSECR, 299 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 300 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 301 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 302 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 303 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */ 304 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 305 /** 306 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 307 * field because ack sequence is not in the window between snd_una 308 * and snd_nxt 309 */ 310 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 311 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 312 SKB_DROP_REASON_TCP_RESET, 313 /** 314 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 315 * SYN flag 316 */ 317 SKB_DROP_REASON_TCP_INVALID_SYN, 318 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 319 SKB_DROP_REASON_TCP_CLOSE, 320 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 321 SKB_DROP_REASON_TCP_FASTOPEN, 322 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 323 SKB_DROP_REASON_TCP_OLD_ACK, 324 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 325 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 326 /** 327 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 328 * sent yet 329 */ 330 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 331 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 332 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 333 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 334 SKB_DROP_REASON_TCP_OFO_DROP, 335 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 336 SKB_DROP_REASON_IP_OUTNOROUTES, 337 /** 338 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 339 * eBPF program 340 */ 341 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 342 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 343 SKB_DROP_REASON_IPV6DISABLED, 344 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 345 SKB_DROP_REASON_NEIGH_CREATEFAIL, 346 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 347 SKB_DROP_REASON_NEIGH_FAILED, 348 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 349 SKB_DROP_REASON_NEIGH_QUEUEFULL, 350 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 351 SKB_DROP_REASON_NEIGH_DEAD, 352 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 353 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 354 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 355 SKB_DROP_REASON_TC_EGRESS, 356 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 357 SKB_DROP_REASON_SECURITY_HOOK, 358 /** 359 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 360 * failed to enqueue to current qdisc) 361 */ 362 SKB_DROP_REASON_QDISC_DROP, 363 /** 364 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc 365 * instance exceeds its total buffer size limit. 366 */ 367 SKB_DROP_REASON_QDISC_OVERLIMIT, 368 /** 369 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm 370 * due to congestion. 371 */ 372 SKB_DROP_REASON_QDISC_CONGESTED, 373 /** 374 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of 375 * CAKE qdisc AQM algorithm (BLUE). 376 */ 377 SKB_DROP_REASON_CAKE_FLOOD, 378 /** 379 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band 380 * limit is reached. 381 */ 382 SKB_DROP_REASON_FQ_BAND_LIMIT, 383 /** 384 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet 385 * timestamp is too far in the future. 386 */ 387 SKB_DROP_REASON_FQ_HORIZON_LIMIT, 388 /** 389 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow 390 * exceeds its limits. 391 */ 392 SKB_DROP_REASON_FQ_FLOW_LIMIT, 393 /** 394 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 395 * backlog queue. This can be caused by backlog queue full (see 396 * netdev_max_backlog in net.rst) or RPS flow limit 397 */ 398 SKB_DROP_REASON_CPU_BACKLOG, 399 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 400 SKB_DROP_REASON_XDP, 401 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 402 SKB_DROP_REASON_TC_INGRESS, 403 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 404 SKB_DROP_REASON_UNHANDLED_PROTO, 405 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 406 SKB_DROP_REASON_SKB_CSUM, 407 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 408 SKB_DROP_REASON_SKB_GSO_SEG, 409 /** 410 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 411 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 412 */ 413 SKB_DROP_REASON_SKB_UCOPY_FAULT, 414 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 415 SKB_DROP_REASON_DEV_HDR, 416 /** 417 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 418 * any of its data structure that is not up/ready/initialized, 419 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 420 * is not initialized 421 */ 422 SKB_DROP_REASON_DEV_READY, 423 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 424 SKB_DROP_REASON_FULL_RING, 425 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 426 SKB_DROP_REASON_NOMEM, 427 /** 428 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 429 * networking data, e.g., failed to pull the protocol header from 430 * frags via pskb_may_pull() 431 */ 432 SKB_DROP_REASON_HDR_TRUNC, 433 /** 434 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 435 * to tun/tap, e.g., via TUNSETFILTEREBPF 436 */ 437 SKB_DROP_REASON_TAP_FILTER, 438 /** 439 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 440 * tun/tap, e.g., check_filter() 441 */ 442 SKB_DROP_REASON_TAP_TXFILTER, 443 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 444 SKB_DROP_REASON_ICMP_CSUM, 445 /** 446 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 447 * such as a broadcasts ICMP_TIMESTAMP 448 */ 449 SKB_DROP_REASON_INVALID_PROTO, 450 /** 451 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 452 * IPSTATS_MIB_INADDRERRORS 453 */ 454 SKB_DROP_REASON_IP_INADDRERRORS, 455 /** 456 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 457 * IPSTATS_MIB_INADDRERRORS 458 */ 459 SKB_DROP_REASON_IP_INNOROUTES, 460 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 461 SKB_DROP_REASON_IP_LOCAL_SOURCE, 462 /** 463 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 464 * 1) source ip is multicast or limited broadcast 465 * 2) source ip is zero and not IGMP 466 */ 467 SKB_DROP_REASON_IP_INVALID_SOURCE, 468 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 469 SKB_DROP_REASON_IP_LOCALNET, 470 /** 471 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 472 * 1) dest ip is 0 473 */ 474 SKB_DROP_REASON_IP_INVALID_DEST, 475 /** 476 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 477 * MTU) 478 */ 479 SKB_DROP_REASON_PKT_TOO_BIG, 480 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 481 SKB_DROP_REASON_DUP_FRAG, 482 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 483 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 484 /** 485 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 486 * (/proc/sys/net/ipv4/ipfrag_max_dist) 487 */ 488 SKB_DROP_REASON_FRAG_TOO_FAR, 489 /** 490 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 491 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 492 */ 493 SKB_DROP_REASON_TCP_MINTTL, 494 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 495 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 496 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 497 SKB_DROP_REASON_IPV6_NDISC_FRAG, 498 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 499 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 500 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 501 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 502 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 503 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 504 /** 505 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 506 * for another host. 507 */ 508 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 509 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 510 SKB_DROP_REASON_QUEUE_PURGE, 511 /** 512 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 513 * processing a tc ext cookie. 514 */ 515 SKB_DROP_REASON_TC_COOKIE_ERROR, 516 /** 517 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 518 * after its filter matches an incoming packet. 519 */ 520 SKB_DROP_REASON_PACKET_SOCK_ERROR, 521 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 522 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 523 /** 524 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 525 * iterations. 526 */ 527 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 528 /** 529 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 530 * 1) reserved fields are not zero 531 * 2) "I" flag is not set 532 */ 533 SKB_DROP_REASON_VXLAN_INVALID_HDR, 534 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 535 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 536 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 537 SKB_DROP_REASON_MAC_INVALID_SOURCE, 538 /** 539 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 540 * entry or an entry pointing to a nexthop. 541 */ 542 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 543 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 544 SKB_DROP_REASON_NO_TX_TARGET, 545 /** 546 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 547 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 548 */ 549 SKB_DROP_REASON_IP_TUNNEL_ECN, 550 /** 551 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 552 * reached a device which is in "external" mode. 553 */ 554 SKB_DROP_REASON_TUNNEL_TXINFO, 555 /** 556 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 557 * the MAC address of the local netdev. 558 */ 559 SKB_DROP_REASON_LOCAL_MAC, 560 /** 561 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 562 * forwarded to the in_dev, and the proxy_arp_pvlan is not 563 * enabled. 564 */ 565 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 566 /** 567 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 568 * is an IEEE MAC Control address. 569 */ 570 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 571 /** 572 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 573 * ingress bridge port does not allow frames to be forwarded. 574 */ 575 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 576 /** 577 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 578 * shouldn't be used as a real 'reason' - only for tracing code gen 579 */ 580 SKB_DROP_REASON_MAX, 581 582 /** 583 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 584 * see &enum skb_drop_reason_subsys 585 */ 586 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 587 }; 588 589 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 590 591 #define SKB_DR_INIT(name, reason) \ 592 enum skb_drop_reason name = SKB_DROP_REASON_##reason 593 #define SKB_DR(name) \ 594 SKB_DR_INIT(name, NOT_SPECIFIED) 595 #define SKB_DR_SET(name, reason) \ 596 (name = SKB_DROP_REASON_##reason) 597 #define SKB_DR_OR(name, reason) \ 598 do { \ 599 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 600 name == SKB_NOT_DROPPED_YET) \ 601 SKB_DR_SET(name, reason); \ 602 } while (0) 603 604 #endif 605