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 FN(PFMEMALLOC) \ 129 FNe(MAX) 130 131 /** 132 * enum skb_drop_reason - the reasons of skb drops 133 * 134 * The reason of skb drop, which is used in kfree_skb_reason(). 135 */ 136 enum skb_drop_reason { 137 /** 138 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 139 */ 140 SKB_NOT_DROPPED_YET = 0, 141 /** @SKB_CONSUMED: packet has been consumed */ 142 SKB_CONSUMED, 143 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 144 SKB_DROP_REASON_NOT_SPECIFIED, 145 /** 146 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 147 * Reason could be one of three cases: 148 * 1) no established/listening socket found during lookup process 149 * 2) no valid request socket during 3WHS process 150 * 3) no valid child socket during 3WHS process 151 */ 152 SKB_DROP_REASON_NO_SOCKET, 153 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 154 SKB_DROP_REASON_SOCKET_CLOSE, 155 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 156 SKB_DROP_REASON_SOCKET_FILTER, 157 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 158 SKB_DROP_REASON_SOCKET_RCVBUFF, 159 /** 160 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 161 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 162 * during send() that the peer has been close()d. 163 */ 164 SKB_DROP_REASON_UNIX_DISCONNECT, 165 /** 166 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 167 * recv() without MSG_OOB so dropped. 168 */ 169 SKB_DROP_REASON_UNIX_SKIP_OOB, 170 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 171 SKB_DROP_REASON_PKT_TOO_SMALL, 172 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 173 SKB_DROP_REASON_TCP_CSUM, 174 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 175 SKB_DROP_REASON_UDP_CSUM, 176 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 177 SKB_DROP_REASON_NETFILTER_DROP, 178 /** 179 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 180 * (interface is in promisc mode) 181 */ 182 SKB_DROP_REASON_OTHERHOST, 183 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 184 SKB_DROP_REASON_IP_CSUM, 185 /** 186 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 187 * IPSTATS_MIB_INHDRERRORS) 188 */ 189 SKB_DROP_REASON_IP_INHDR, 190 /** 191 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 192 * document for rp_filter in ip-sysctl.rst for more information 193 */ 194 SKB_DROP_REASON_IP_RPFILTER, 195 /** 196 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 197 * multicast, but L3 is unicast. 198 */ 199 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 200 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 201 SKB_DROP_REASON_XFRM_POLICY, 202 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 203 SKB_DROP_REASON_IP_NOPROTO, 204 /** 205 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 206 * udp packet drop out of udp_memory_allocated. 207 */ 208 SKB_DROP_REASON_PROTO_MEM, 209 /** 210 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 211 * twice or set incorrectly. 212 */ 213 SKB_DROP_REASON_TCP_AUTH_HDR, 214 /** 215 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 216 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 217 */ 218 SKB_DROP_REASON_TCP_MD5NOTFOUND, 219 /** 220 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 221 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 222 */ 223 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 224 /** 225 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 226 * to LINUX_MIB_TCPMD5FAILURE 227 */ 228 SKB_DROP_REASON_TCP_MD5FAILURE, 229 /** 230 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 231 * corresponding to LINUX_MIB_TCPAOREQUIRED 232 */ 233 SKB_DROP_REASON_TCP_AONOTFOUND, 234 /** 235 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 236 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 237 */ 238 SKB_DROP_REASON_TCP_AOUNEXPECTED, 239 /** 240 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 241 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 242 */ 243 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 244 /** 245 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 246 * corresponding to LINUX_MIB_TCPAOBAD 247 */ 248 SKB_DROP_REASON_TCP_AOFAILURE, 249 /** 250 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 251 * see LINUX_MIB_TCPBACKLOGDROP) 252 */ 253 SKB_DROP_REASON_SOCKET_BACKLOG, 254 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 255 SKB_DROP_REASON_TCP_FLAGS, 256 /** 257 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 258 * LINUX_MIB_TCPABORTONDATA 259 */ 260 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 261 /** 262 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 263 * see LINUX_MIB_TCPZEROWINDOWDROP 264 */ 265 SKB_DROP_REASON_TCP_ZEROWINDOW, 266 /** 267 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 268 * received before (spurious retrans may happened), see 269 * LINUX_MIB_DELAYEDACKLOST 270 */ 271 SKB_DROP_REASON_TCP_OLD_DATA, 272 /** 273 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 274 * the seq of the first byte exceed the right edges of receive 275 * window 276 */ 277 SKB_DROP_REASON_TCP_OVERWINDOW, 278 /** 279 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 280 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 281 */ 282 SKB_DROP_REASON_TCP_OFOMERGE, 283 /** 284 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 285 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 286 */ 287 SKB_DROP_REASON_TCP_RFC7323_PAWS, 288 /** 289 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 290 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 291 */ 292 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 293 /** 294 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 295 * TIME_WAIT state. 296 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 297 */ 298 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 299 /** 300 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 301 * Corresponds to LINUX_MIB_TSECRREJECTED. 302 */ 303 SKB_DROP_REASON_TCP_RFC7323_TSECR, 304 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 305 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 306 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 307 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 308 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field. */ 309 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 310 /** 311 * @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE: 312 * Not acceptable END_SEQ field. 313 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 314 */ 315 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 316 /** 317 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 318 * field because ack sequence is not in the window between snd_una 319 * and snd_nxt 320 */ 321 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 322 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 323 SKB_DROP_REASON_TCP_RESET, 324 /** 325 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 326 * SYN flag 327 */ 328 SKB_DROP_REASON_TCP_INVALID_SYN, 329 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 330 SKB_DROP_REASON_TCP_CLOSE, 331 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 332 SKB_DROP_REASON_TCP_FASTOPEN, 333 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 334 SKB_DROP_REASON_TCP_OLD_ACK, 335 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 336 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 337 /** 338 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 339 * sent yet 340 */ 341 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 342 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 343 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 344 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 345 SKB_DROP_REASON_TCP_OFO_DROP, 346 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 347 SKB_DROP_REASON_IP_OUTNOROUTES, 348 /** 349 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 350 * eBPF program 351 */ 352 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 353 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 354 SKB_DROP_REASON_IPV6DISABLED, 355 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 356 SKB_DROP_REASON_NEIGH_CREATEFAIL, 357 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 358 SKB_DROP_REASON_NEIGH_FAILED, 359 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 360 SKB_DROP_REASON_NEIGH_QUEUEFULL, 361 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 362 SKB_DROP_REASON_NEIGH_DEAD, 363 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 364 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 365 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 366 SKB_DROP_REASON_TC_EGRESS, 367 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 368 SKB_DROP_REASON_SECURITY_HOOK, 369 /** 370 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 371 * failed to enqueue to current qdisc) 372 */ 373 SKB_DROP_REASON_QDISC_DROP, 374 /** 375 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc 376 * instance exceeds its total buffer size limit. 377 */ 378 SKB_DROP_REASON_QDISC_OVERLIMIT, 379 /** 380 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm 381 * due to congestion. 382 */ 383 SKB_DROP_REASON_QDISC_CONGESTED, 384 /** 385 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of 386 * CAKE qdisc AQM algorithm (BLUE). 387 */ 388 SKB_DROP_REASON_CAKE_FLOOD, 389 /** 390 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band 391 * limit is reached. 392 */ 393 SKB_DROP_REASON_FQ_BAND_LIMIT, 394 /** 395 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet 396 * timestamp is too far in the future. 397 */ 398 SKB_DROP_REASON_FQ_HORIZON_LIMIT, 399 /** 400 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow 401 * exceeds its limits. 402 */ 403 SKB_DROP_REASON_FQ_FLOW_LIMIT, 404 /** 405 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 406 * backlog queue. This can be caused by backlog queue full (see 407 * netdev_max_backlog in net.rst) or RPS flow limit 408 */ 409 SKB_DROP_REASON_CPU_BACKLOG, 410 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 411 SKB_DROP_REASON_XDP, 412 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 413 SKB_DROP_REASON_TC_INGRESS, 414 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 415 SKB_DROP_REASON_UNHANDLED_PROTO, 416 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 417 SKB_DROP_REASON_SKB_CSUM, 418 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 419 SKB_DROP_REASON_SKB_GSO_SEG, 420 /** 421 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 422 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 423 */ 424 SKB_DROP_REASON_SKB_UCOPY_FAULT, 425 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 426 SKB_DROP_REASON_DEV_HDR, 427 /** 428 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 429 * any of its data structure that is not up/ready/initialized, 430 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 431 * is not initialized 432 */ 433 SKB_DROP_REASON_DEV_READY, 434 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 435 SKB_DROP_REASON_FULL_RING, 436 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 437 SKB_DROP_REASON_NOMEM, 438 /** 439 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 440 * networking data, e.g., failed to pull the protocol header from 441 * frags via pskb_may_pull() 442 */ 443 SKB_DROP_REASON_HDR_TRUNC, 444 /** 445 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 446 * to tun/tap, e.g., via TUNSETFILTEREBPF 447 */ 448 SKB_DROP_REASON_TAP_FILTER, 449 /** 450 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 451 * tun/tap, e.g., check_filter() 452 */ 453 SKB_DROP_REASON_TAP_TXFILTER, 454 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 455 SKB_DROP_REASON_ICMP_CSUM, 456 /** 457 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 458 * such as a broadcasts ICMP_TIMESTAMP 459 */ 460 SKB_DROP_REASON_INVALID_PROTO, 461 /** 462 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 463 * IPSTATS_MIB_INADDRERRORS 464 */ 465 SKB_DROP_REASON_IP_INADDRERRORS, 466 /** 467 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 468 * IPSTATS_MIB_INADDRERRORS 469 */ 470 SKB_DROP_REASON_IP_INNOROUTES, 471 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 472 SKB_DROP_REASON_IP_LOCAL_SOURCE, 473 /** 474 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 475 * 1) source ip is multicast or limited broadcast 476 * 2) source ip is zero and not IGMP 477 */ 478 SKB_DROP_REASON_IP_INVALID_SOURCE, 479 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 480 SKB_DROP_REASON_IP_LOCALNET, 481 /** 482 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 483 * 1) dest ip is 0 484 */ 485 SKB_DROP_REASON_IP_INVALID_DEST, 486 /** 487 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 488 * MTU) 489 */ 490 SKB_DROP_REASON_PKT_TOO_BIG, 491 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 492 SKB_DROP_REASON_DUP_FRAG, 493 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 494 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 495 /** 496 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 497 * (/proc/sys/net/ipv4/ipfrag_max_dist) 498 */ 499 SKB_DROP_REASON_FRAG_TOO_FAR, 500 /** 501 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 502 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 503 */ 504 SKB_DROP_REASON_TCP_MINTTL, 505 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 506 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 507 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 508 SKB_DROP_REASON_IPV6_NDISC_FRAG, 509 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 510 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 511 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 512 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 513 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 514 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 515 /** 516 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 517 * for another host. 518 */ 519 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 520 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 521 SKB_DROP_REASON_QUEUE_PURGE, 522 /** 523 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 524 * processing a tc ext cookie. 525 */ 526 SKB_DROP_REASON_TC_COOKIE_ERROR, 527 /** 528 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 529 * after its filter matches an incoming packet. 530 */ 531 SKB_DROP_REASON_PACKET_SOCK_ERROR, 532 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 533 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 534 /** 535 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 536 * iterations. 537 */ 538 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 539 /** 540 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 541 * 1) reserved fields are not zero 542 * 2) "I" flag is not set 543 */ 544 SKB_DROP_REASON_VXLAN_INVALID_HDR, 545 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 546 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 547 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 548 SKB_DROP_REASON_MAC_INVALID_SOURCE, 549 /** 550 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 551 * entry or an entry pointing to a nexthop. 552 */ 553 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 554 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 555 SKB_DROP_REASON_NO_TX_TARGET, 556 /** 557 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 558 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 559 */ 560 SKB_DROP_REASON_IP_TUNNEL_ECN, 561 /** 562 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 563 * reached a device which is in "external" mode. 564 */ 565 SKB_DROP_REASON_TUNNEL_TXINFO, 566 /** 567 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 568 * the MAC address of the local netdev. 569 */ 570 SKB_DROP_REASON_LOCAL_MAC, 571 /** 572 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 573 * forwarded to the in_dev, and the proxy_arp_pvlan is not 574 * enabled. 575 */ 576 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 577 /** 578 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 579 * is an IEEE MAC Control address. 580 */ 581 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 582 /** 583 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 584 * ingress bridge port does not allow frames to be forwarded. 585 */ 586 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 587 /** 588 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 589 * non conform CAN frame (or device is unable to receive CAN frames) 590 */ 591 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 592 /** 593 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 594 * non conform CAN-FD frame (or device is unable to receive CAN frames) 595 */ 596 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 597 /** 598 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 599 * non conform CAN-XL frame (or device is unable to receive CAN frames) 600 */ 601 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 602 /** 603 * @SKB_DROP_REASON_PFMEMALLOC: packet allocated from memory reserve 604 * reached a path or socket not eligible for use of memory reserves 605 */ 606 SKB_DROP_REASON_PFMEMALLOC, 607 /** 608 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 609 * shouldn't be used as a real 'reason' - only for tracing code gen 610 */ 611 SKB_DROP_REASON_MAX, 612 613 /** 614 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 615 * see &enum skb_drop_reason_subsys 616 */ 617 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 618 }; 619 620 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 621 622 #define SKB_DR_INIT(name, reason) \ 623 enum skb_drop_reason name = SKB_DROP_REASON_##reason 624 #define SKB_DR(name) \ 625 SKB_DR_INIT(name, NOT_SPECIFIED) 626 #define SKB_DR_SET(name, reason) \ 627 (name = SKB_DROP_REASON_##reason) 628 #define SKB_DR_OR(name, reason) \ 629 do { \ 630 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 631 name == SKB_NOT_DROPPED_YET) \ 632 SKB_DR_SET(name, reason); \ 633 } while (0) 634 635 #endif 636