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_END_SEQUENCE) \ 49 FN(TCP_INVALID_ACK_SEQUENCE) \ 50 FN(TCP_RESET) \ 51 FN(TCP_INVALID_SYN) \ 52 FN(TCP_CLOSE) \ 53 FN(TCP_FASTOPEN) \ 54 FN(TCP_OLD_ACK) \ 55 FN(TCP_TOO_OLD_ACK) \ 56 FN(TCP_ACK_UNSENT_DATA) \ 57 FN(TCP_OFO_QUEUE_PRUNE) \ 58 FN(TCP_OFO_DROP) \ 59 FN(IP_OUTNOROUTES) \ 60 FN(BPF_CGROUP_EGRESS) \ 61 FN(IPV6DISABLED) \ 62 FN(NEIGH_CREATEFAIL) \ 63 FN(NEIGH_FAILED) \ 64 FN(NEIGH_QUEUEFULL) \ 65 FN(NEIGH_DEAD) \ 66 FN(NEIGH_HH_FILLFAIL) \ 67 FN(TC_EGRESS) \ 68 FN(SECURITY_HOOK) \ 69 FN(QDISC_DROP) \ 70 FN(QDISC_OVERLIMIT) \ 71 FN(QDISC_CONGESTED) \ 72 FN(CAKE_FLOOD) \ 73 FN(FQ_BAND_LIMIT) \ 74 FN(FQ_HORIZON_LIMIT) \ 75 FN(FQ_FLOW_LIMIT) \ 76 FN(CPU_BACKLOG) \ 77 FN(XDP) \ 78 FN(TC_INGRESS) \ 79 FN(UNHANDLED_PROTO) \ 80 FN(SKB_CSUM) \ 81 FN(SKB_GSO_SEG) \ 82 FN(SKB_UCOPY_FAULT) \ 83 FN(DEV_HDR) \ 84 FN(DEV_READY) \ 85 FN(FULL_RING) \ 86 FN(NOMEM) \ 87 FN(HDR_TRUNC) \ 88 FN(TAP_FILTER) \ 89 FN(TAP_TXFILTER) \ 90 FN(ICMP_CSUM) \ 91 FN(INVALID_PROTO) \ 92 FN(IP_INADDRERRORS) \ 93 FN(IP_INNOROUTES) \ 94 FN(IP_LOCAL_SOURCE) \ 95 FN(IP_INVALID_SOURCE) \ 96 FN(IP_LOCALNET) \ 97 FN(IP_INVALID_DEST) \ 98 FN(PKT_TOO_BIG) \ 99 FN(DUP_FRAG) \ 100 FN(FRAG_REASM_TIMEOUT) \ 101 FN(FRAG_TOO_FAR) \ 102 FN(TCP_MINTTL) \ 103 FN(IPV6_BAD_EXTHDR) \ 104 FN(IPV6_NDISC_FRAG) \ 105 FN(IPV6_NDISC_HOP_LIMIT) \ 106 FN(IPV6_NDISC_BAD_CODE) \ 107 FN(IPV6_NDISC_BAD_OPTIONS) \ 108 FN(IPV6_NDISC_NS_OTHERHOST) \ 109 FN(QUEUE_PURGE) \ 110 FN(TC_COOKIE_ERROR) \ 111 FN(PACKET_SOCK_ERROR) \ 112 FN(TC_CHAIN_NOTFOUND) \ 113 FN(TC_RECLASSIFY_LOOP) \ 114 FN(VXLAN_INVALID_HDR) \ 115 FN(VXLAN_VNI_NOT_FOUND) \ 116 FN(MAC_INVALID_SOURCE) \ 117 FN(VXLAN_ENTRY_EXISTS) \ 118 FN(NO_TX_TARGET) \ 119 FN(IP_TUNNEL_ECN) \ 120 FN(TUNNEL_TXINFO) \ 121 FN(LOCAL_MAC) \ 122 FN(ARP_PVLAN_DISABLE) \ 123 FN(MAC_IEEE_MAC_CONTROL) \ 124 FN(BRIDGE_INGRESS_STP_STATE) \ 125 FN(CAN_RX_INVALID_FRAME) \ 126 FN(CANFD_RX_INVALID_FRAME) \ 127 FN(CANXL_RX_INVALID_FRAME) \ 128 FNe(MAX) 129 130 /** 131 * enum skb_drop_reason - the reasons of skb drops 132 * 133 * The reason of skb drop, which is used in kfree_skb_reason(). 134 */ 135 enum skb_drop_reason { 136 /** 137 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 138 */ 139 SKB_NOT_DROPPED_YET = 0, 140 /** @SKB_CONSUMED: packet has been consumed */ 141 SKB_CONSUMED, 142 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 143 SKB_DROP_REASON_NOT_SPECIFIED, 144 /** 145 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 146 * Reason could be one of three cases: 147 * 1) no established/listening socket found during lookup process 148 * 2) no valid request socket during 3WHS process 149 * 3) no valid child socket during 3WHS process 150 */ 151 SKB_DROP_REASON_NO_SOCKET, 152 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 153 SKB_DROP_REASON_SOCKET_CLOSE, 154 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 155 SKB_DROP_REASON_SOCKET_FILTER, 156 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 157 SKB_DROP_REASON_SOCKET_RCVBUFF, 158 /** 159 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 160 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 161 * during send() that the peer has been close()d. 162 */ 163 SKB_DROP_REASON_UNIX_DISCONNECT, 164 /** 165 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 166 * recv() without MSG_OOB so dropped. 167 */ 168 SKB_DROP_REASON_UNIX_SKIP_OOB, 169 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 170 SKB_DROP_REASON_PKT_TOO_SMALL, 171 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 172 SKB_DROP_REASON_TCP_CSUM, 173 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 174 SKB_DROP_REASON_UDP_CSUM, 175 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 176 SKB_DROP_REASON_NETFILTER_DROP, 177 /** 178 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 179 * (interface is in promisc mode) 180 */ 181 SKB_DROP_REASON_OTHERHOST, 182 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 183 SKB_DROP_REASON_IP_CSUM, 184 /** 185 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 186 * IPSTATS_MIB_INHDRERRORS) 187 */ 188 SKB_DROP_REASON_IP_INHDR, 189 /** 190 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 191 * document for rp_filter in ip-sysctl.rst for more information 192 */ 193 SKB_DROP_REASON_IP_RPFILTER, 194 /** 195 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 196 * multicast, but L3 is unicast. 197 */ 198 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 199 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 200 SKB_DROP_REASON_XFRM_POLICY, 201 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 202 SKB_DROP_REASON_IP_NOPROTO, 203 /** 204 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 205 * udp packet drop out of udp_memory_allocated. 206 */ 207 SKB_DROP_REASON_PROTO_MEM, 208 /** 209 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 210 * twice or set incorrectly. 211 */ 212 SKB_DROP_REASON_TCP_AUTH_HDR, 213 /** 214 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 215 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 216 */ 217 SKB_DROP_REASON_TCP_MD5NOTFOUND, 218 /** 219 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 220 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 221 */ 222 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 223 /** 224 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 225 * to LINUX_MIB_TCPMD5FAILURE 226 */ 227 SKB_DROP_REASON_TCP_MD5FAILURE, 228 /** 229 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 230 * corresponding to LINUX_MIB_TCPAOREQUIRED 231 */ 232 SKB_DROP_REASON_TCP_AONOTFOUND, 233 /** 234 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 235 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 236 */ 237 SKB_DROP_REASON_TCP_AOUNEXPECTED, 238 /** 239 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 240 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 241 */ 242 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 243 /** 244 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 245 * corresponding to LINUX_MIB_TCPAOBAD 246 */ 247 SKB_DROP_REASON_TCP_AOFAILURE, 248 /** 249 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 250 * see LINUX_MIB_TCPBACKLOGDROP) 251 */ 252 SKB_DROP_REASON_SOCKET_BACKLOG, 253 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 254 SKB_DROP_REASON_TCP_FLAGS, 255 /** 256 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 257 * LINUX_MIB_TCPABORTONDATA 258 */ 259 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 260 /** 261 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 262 * see LINUX_MIB_TCPZEROWINDOWDROP 263 */ 264 SKB_DROP_REASON_TCP_ZEROWINDOW, 265 /** 266 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 267 * received before (spurious retrans may happened), see 268 * LINUX_MIB_DELAYEDACKLOST 269 */ 270 SKB_DROP_REASON_TCP_OLD_DATA, 271 /** 272 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 273 * the seq of the first byte exceed the right edges of receive 274 * window 275 */ 276 SKB_DROP_REASON_TCP_OVERWINDOW, 277 /** 278 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 279 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 280 */ 281 SKB_DROP_REASON_TCP_OFOMERGE, 282 /** 283 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 284 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 285 */ 286 SKB_DROP_REASON_TCP_RFC7323_PAWS, 287 /** 288 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 289 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 290 */ 291 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 292 /** 293 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 294 * TIME_WAIT state. 295 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 296 */ 297 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 298 /** 299 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 300 * Corresponds to LINUX_MIB_TSECRREJECTED. 301 */ 302 SKB_DROP_REASON_TCP_RFC7323_TSECR, 303 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 304 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 305 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 306 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 307 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field. */ 308 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 309 /** 310 * @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE: 311 * Not acceptable END_SEQ field. 312 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 313 */ 314 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 315 /** 316 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 317 * field because ack sequence is not in the window between snd_una 318 * and snd_nxt 319 */ 320 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 321 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 322 SKB_DROP_REASON_TCP_RESET, 323 /** 324 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 325 * SYN flag 326 */ 327 SKB_DROP_REASON_TCP_INVALID_SYN, 328 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 329 SKB_DROP_REASON_TCP_CLOSE, 330 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 331 SKB_DROP_REASON_TCP_FASTOPEN, 332 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 333 SKB_DROP_REASON_TCP_OLD_ACK, 334 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 335 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 336 /** 337 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 338 * sent yet 339 */ 340 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 341 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 342 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 343 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 344 SKB_DROP_REASON_TCP_OFO_DROP, 345 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 346 SKB_DROP_REASON_IP_OUTNOROUTES, 347 /** 348 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 349 * eBPF program 350 */ 351 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 352 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 353 SKB_DROP_REASON_IPV6DISABLED, 354 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 355 SKB_DROP_REASON_NEIGH_CREATEFAIL, 356 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 357 SKB_DROP_REASON_NEIGH_FAILED, 358 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 359 SKB_DROP_REASON_NEIGH_QUEUEFULL, 360 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 361 SKB_DROP_REASON_NEIGH_DEAD, 362 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 363 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 364 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 365 SKB_DROP_REASON_TC_EGRESS, 366 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 367 SKB_DROP_REASON_SECURITY_HOOK, 368 /** 369 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 370 * failed to enqueue to current qdisc) 371 */ 372 SKB_DROP_REASON_QDISC_DROP, 373 /** 374 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc 375 * instance exceeds its total buffer size limit. 376 */ 377 SKB_DROP_REASON_QDISC_OVERLIMIT, 378 /** 379 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm 380 * due to congestion. 381 */ 382 SKB_DROP_REASON_QDISC_CONGESTED, 383 /** 384 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of 385 * CAKE qdisc AQM algorithm (BLUE). 386 */ 387 SKB_DROP_REASON_CAKE_FLOOD, 388 /** 389 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band 390 * limit is reached. 391 */ 392 SKB_DROP_REASON_FQ_BAND_LIMIT, 393 /** 394 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet 395 * timestamp is too far in the future. 396 */ 397 SKB_DROP_REASON_FQ_HORIZON_LIMIT, 398 /** 399 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow 400 * exceeds its limits. 401 */ 402 SKB_DROP_REASON_FQ_FLOW_LIMIT, 403 /** 404 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 405 * backlog queue. This can be caused by backlog queue full (see 406 * netdev_max_backlog in net.rst) or RPS flow limit 407 */ 408 SKB_DROP_REASON_CPU_BACKLOG, 409 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 410 SKB_DROP_REASON_XDP, 411 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 412 SKB_DROP_REASON_TC_INGRESS, 413 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 414 SKB_DROP_REASON_UNHANDLED_PROTO, 415 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 416 SKB_DROP_REASON_SKB_CSUM, 417 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 418 SKB_DROP_REASON_SKB_GSO_SEG, 419 /** 420 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 421 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 422 */ 423 SKB_DROP_REASON_SKB_UCOPY_FAULT, 424 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 425 SKB_DROP_REASON_DEV_HDR, 426 /** 427 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 428 * any of its data structure that is not up/ready/initialized, 429 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 430 * is not initialized 431 */ 432 SKB_DROP_REASON_DEV_READY, 433 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 434 SKB_DROP_REASON_FULL_RING, 435 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 436 SKB_DROP_REASON_NOMEM, 437 /** 438 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 439 * networking data, e.g., failed to pull the protocol header from 440 * frags via pskb_may_pull() 441 */ 442 SKB_DROP_REASON_HDR_TRUNC, 443 /** 444 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 445 * to tun/tap, e.g., via TUNSETFILTEREBPF 446 */ 447 SKB_DROP_REASON_TAP_FILTER, 448 /** 449 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 450 * tun/tap, e.g., check_filter() 451 */ 452 SKB_DROP_REASON_TAP_TXFILTER, 453 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 454 SKB_DROP_REASON_ICMP_CSUM, 455 /** 456 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 457 * such as a broadcasts ICMP_TIMESTAMP 458 */ 459 SKB_DROP_REASON_INVALID_PROTO, 460 /** 461 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 462 * IPSTATS_MIB_INADDRERRORS 463 */ 464 SKB_DROP_REASON_IP_INADDRERRORS, 465 /** 466 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 467 * IPSTATS_MIB_INADDRERRORS 468 */ 469 SKB_DROP_REASON_IP_INNOROUTES, 470 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 471 SKB_DROP_REASON_IP_LOCAL_SOURCE, 472 /** 473 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 474 * 1) source ip is multicast or limited broadcast 475 * 2) source ip is zero and not IGMP 476 */ 477 SKB_DROP_REASON_IP_INVALID_SOURCE, 478 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 479 SKB_DROP_REASON_IP_LOCALNET, 480 /** 481 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 482 * 1) dest ip is 0 483 */ 484 SKB_DROP_REASON_IP_INVALID_DEST, 485 /** 486 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 487 * MTU) 488 */ 489 SKB_DROP_REASON_PKT_TOO_BIG, 490 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 491 SKB_DROP_REASON_DUP_FRAG, 492 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 493 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 494 /** 495 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 496 * (/proc/sys/net/ipv4/ipfrag_max_dist) 497 */ 498 SKB_DROP_REASON_FRAG_TOO_FAR, 499 /** 500 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 501 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 502 */ 503 SKB_DROP_REASON_TCP_MINTTL, 504 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 505 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 506 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 507 SKB_DROP_REASON_IPV6_NDISC_FRAG, 508 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 509 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 510 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 511 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 512 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 513 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 514 /** 515 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 516 * for another host. 517 */ 518 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 519 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 520 SKB_DROP_REASON_QUEUE_PURGE, 521 /** 522 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 523 * processing a tc ext cookie. 524 */ 525 SKB_DROP_REASON_TC_COOKIE_ERROR, 526 /** 527 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 528 * after its filter matches an incoming packet. 529 */ 530 SKB_DROP_REASON_PACKET_SOCK_ERROR, 531 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 532 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 533 /** 534 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 535 * iterations. 536 */ 537 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 538 /** 539 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 540 * 1) reserved fields are not zero 541 * 2) "I" flag is not set 542 */ 543 SKB_DROP_REASON_VXLAN_INVALID_HDR, 544 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 545 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 546 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 547 SKB_DROP_REASON_MAC_INVALID_SOURCE, 548 /** 549 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 550 * entry or an entry pointing to a nexthop. 551 */ 552 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 553 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 554 SKB_DROP_REASON_NO_TX_TARGET, 555 /** 556 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 557 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 558 */ 559 SKB_DROP_REASON_IP_TUNNEL_ECN, 560 /** 561 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 562 * reached a device which is in "external" mode. 563 */ 564 SKB_DROP_REASON_TUNNEL_TXINFO, 565 /** 566 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 567 * the MAC address of the local netdev. 568 */ 569 SKB_DROP_REASON_LOCAL_MAC, 570 /** 571 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 572 * forwarded to the in_dev, and the proxy_arp_pvlan is not 573 * enabled. 574 */ 575 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 576 /** 577 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 578 * is an IEEE MAC Control address. 579 */ 580 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 581 /** 582 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 583 * ingress bridge port does not allow frames to be forwarded. 584 */ 585 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 586 /** 587 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 588 * non conform CAN frame (or device is unable to receive CAN frames) 589 */ 590 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 591 /** 592 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 593 * non conform CAN-FD frame (or device is unable to receive CAN frames) 594 */ 595 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 596 /** 597 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 598 * non conform CAN-XL frame (or device is unable to receive CAN frames) 599 */ 600 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 601 /** 602 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 603 * shouldn't be used as a real 'reason' - only for tracing code gen 604 */ 605 SKB_DROP_REASON_MAX, 606 607 /** 608 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 609 * see &enum skb_drop_reason_subsys 610 */ 611 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 612 }; 613 614 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 615 616 #define SKB_DR_INIT(name, reason) \ 617 enum skb_drop_reason name = SKB_DROP_REASON_##reason 618 #define SKB_DR(name) \ 619 SKB_DR_INIT(name, NOT_SPECIFIED) 620 #define SKB_DR_SET(name, reason) \ 621 (name = SKB_DROP_REASON_##reason) 622 #define SKB_DR_OR(name, reason) \ 623 do { \ 624 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 625 name == SKB_NOT_DROPPED_YET) \ 626 SKB_DR_SET(name, reason); \ 627 } while (0) 628 629 #endif 630