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 FN(DUALPI2_STEP_DROP) \ 130 FN(PSP_INPUT) \ 131 FN(PSP_OUTPUT) \ 132 FNe(MAX) 133 134 /** 135 * enum skb_drop_reason - the reasons of skb drops 136 * 137 * The reason of skb drop, which is used in kfree_skb_reason(). 138 */ 139 enum skb_drop_reason { 140 /** 141 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 142 */ 143 SKB_NOT_DROPPED_YET = 0, 144 /** @SKB_CONSUMED: packet has been consumed */ 145 SKB_CONSUMED, 146 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 147 SKB_DROP_REASON_NOT_SPECIFIED, 148 /** 149 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 150 * Reason could be one of three cases: 151 * 1) no established/listening socket found during lookup process 152 * 2) no valid request socket during 3WHS process 153 * 3) no valid child socket during 3WHS process 154 */ 155 SKB_DROP_REASON_NO_SOCKET, 156 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 157 SKB_DROP_REASON_SOCKET_CLOSE, 158 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 159 SKB_DROP_REASON_SOCKET_FILTER, 160 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 161 SKB_DROP_REASON_SOCKET_RCVBUFF, 162 /** 163 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 164 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 165 * during send() that the peer has been close()d. 166 */ 167 SKB_DROP_REASON_UNIX_DISCONNECT, 168 /** 169 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 170 * recv() without MSG_OOB so dropped. 171 */ 172 SKB_DROP_REASON_UNIX_SKIP_OOB, 173 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 174 SKB_DROP_REASON_PKT_TOO_SMALL, 175 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 176 SKB_DROP_REASON_TCP_CSUM, 177 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 178 SKB_DROP_REASON_UDP_CSUM, 179 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 180 SKB_DROP_REASON_NETFILTER_DROP, 181 /** 182 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 183 * (interface is in promisc mode) 184 */ 185 SKB_DROP_REASON_OTHERHOST, 186 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 187 SKB_DROP_REASON_IP_CSUM, 188 /** 189 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 190 * IPSTATS_MIB_INHDRERRORS) 191 */ 192 SKB_DROP_REASON_IP_INHDR, 193 /** 194 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 195 * document for rp_filter in ip-sysctl.rst for more information 196 */ 197 SKB_DROP_REASON_IP_RPFILTER, 198 /** 199 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 200 * multicast, but L3 is unicast. 201 */ 202 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 203 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 204 SKB_DROP_REASON_XFRM_POLICY, 205 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 206 SKB_DROP_REASON_IP_NOPROTO, 207 /** 208 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 209 * udp packet drop out of udp_memory_allocated. 210 */ 211 SKB_DROP_REASON_PROTO_MEM, 212 /** 213 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 214 * twice or set incorrectly. 215 */ 216 SKB_DROP_REASON_TCP_AUTH_HDR, 217 /** 218 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 219 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 220 */ 221 SKB_DROP_REASON_TCP_MD5NOTFOUND, 222 /** 223 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 224 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 225 */ 226 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 227 /** 228 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 229 * to LINUX_MIB_TCPMD5FAILURE 230 */ 231 SKB_DROP_REASON_TCP_MD5FAILURE, 232 /** 233 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 234 * corresponding to LINUX_MIB_TCPAOREQUIRED 235 */ 236 SKB_DROP_REASON_TCP_AONOTFOUND, 237 /** 238 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 239 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 240 */ 241 SKB_DROP_REASON_TCP_AOUNEXPECTED, 242 /** 243 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 244 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 245 */ 246 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 247 /** 248 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 249 * corresponding to LINUX_MIB_TCPAOBAD 250 */ 251 SKB_DROP_REASON_TCP_AOFAILURE, 252 /** 253 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 254 * see LINUX_MIB_TCPBACKLOGDROP) 255 */ 256 SKB_DROP_REASON_SOCKET_BACKLOG, 257 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 258 SKB_DROP_REASON_TCP_FLAGS, 259 /** 260 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 261 * LINUX_MIB_TCPABORTONDATA 262 */ 263 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 264 /** 265 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 266 * see LINUX_MIB_TCPZEROWINDOWDROP 267 */ 268 SKB_DROP_REASON_TCP_ZEROWINDOW, 269 /** 270 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 271 * received before (spurious retrans may happened), see 272 * LINUX_MIB_DELAYEDACKLOST 273 */ 274 SKB_DROP_REASON_TCP_OLD_DATA, 275 /** 276 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 277 * the seq of the first byte exceed the right edges of receive 278 * window 279 */ 280 SKB_DROP_REASON_TCP_OVERWINDOW, 281 /** 282 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 283 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 284 */ 285 SKB_DROP_REASON_TCP_OFOMERGE, 286 /** 287 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 288 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 289 */ 290 SKB_DROP_REASON_TCP_RFC7323_PAWS, 291 /** 292 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 293 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 294 */ 295 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 296 /** 297 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 298 * TIME_WAIT state. 299 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 300 */ 301 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 302 /** 303 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 304 * Corresponds to LINUX_MIB_TSECRREJECTED. 305 */ 306 SKB_DROP_REASON_TCP_RFC7323_TSECR, 307 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 308 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 309 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 310 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 311 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field. */ 312 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 313 /** 314 * @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE: 315 * Not acceptable END_SEQ field. 316 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 317 */ 318 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 319 /** 320 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 321 * field because ack sequence is not in the window between snd_una 322 * and snd_nxt 323 */ 324 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 325 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 326 SKB_DROP_REASON_TCP_RESET, 327 /** 328 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 329 * SYN flag 330 */ 331 SKB_DROP_REASON_TCP_INVALID_SYN, 332 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 333 SKB_DROP_REASON_TCP_CLOSE, 334 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 335 SKB_DROP_REASON_TCP_FASTOPEN, 336 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 337 SKB_DROP_REASON_TCP_OLD_ACK, 338 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 339 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 340 /** 341 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 342 * sent yet 343 */ 344 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 345 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 346 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 347 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 348 SKB_DROP_REASON_TCP_OFO_DROP, 349 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 350 SKB_DROP_REASON_IP_OUTNOROUTES, 351 /** 352 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 353 * eBPF program 354 */ 355 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 356 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 357 SKB_DROP_REASON_IPV6DISABLED, 358 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 359 SKB_DROP_REASON_NEIGH_CREATEFAIL, 360 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 361 SKB_DROP_REASON_NEIGH_FAILED, 362 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 363 SKB_DROP_REASON_NEIGH_QUEUEFULL, 364 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 365 SKB_DROP_REASON_NEIGH_DEAD, 366 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 367 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 368 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 369 SKB_DROP_REASON_TC_EGRESS, 370 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 371 SKB_DROP_REASON_SECURITY_HOOK, 372 /** 373 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 374 * failed to enqueue to current qdisc) 375 */ 376 SKB_DROP_REASON_QDISC_DROP, 377 /** 378 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc 379 * instance exceeds its total buffer size limit. 380 */ 381 SKB_DROP_REASON_QDISC_OVERLIMIT, 382 /** 383 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm 384 * due to congestion. 385 */ 386 SKB_DROP_REASON_QDISC_CONGESTED, 387 /** 388 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of 389 * CAKE qdisc AQM algorithm (BLUE). 390 */ 391 SKB_DROP_REASON_CAKE_FLOOD, 392 /** 393 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band 394 * limit is reached. 395 */ 396 SKB_DROP_REASON_FQ_BAND_LIMIT, 397 /** 398 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet 399 * timestamp is too far in the future. 400 */ 401 SKB_DROP_REASON_FQ_HORIZON_LIMIT, 402 /** 403 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow 404 * exceeds its limits. 405 */ 406 SKB_DROP_REASON_FQ_FLOW_LIMIT, 407 /** 408 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 409 * backlog queue. This can be caused by backlog queue full (see 410 * netdev_max_backlog in net.rst) or RPS flow limit 411 */ 412 SKB_DROP_REASON_CPU_BACKLOG, 413 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 414 SKB_DROP_REASON_XDP, 415 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 416 SKB_DROP_REASON_TC_INGRESS, 417 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 418 SKB_DROP_REASON_UNHANDLED_PROTO, 419 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 420 SKB_DROP_REASON_SKB_CSUM, 421 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 422 SKB_DROP_REASON_SKB_GSO_SEG, 423 /** 424 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 425 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 426 */ 427 SKB_DROP_REASON_SKB_UCOPY_FAULT, 428 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 429 SKB_DROP_REASON_DEV_HDR, 430 /** 431 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 432 * any of its data structure that is not up/ready/initialized, 433 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 434 * is not initialized 435 */ 436 SKB_DROP_REASON_DEV_READY, 437 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 438 SKB_DROP_REASON_FULL_RING, 439 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 440 SKB_DROP_REASON_NOMEM, 441 /** 442 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 443 * networking data, e.g., failed to pull the protocol header from 444 * frags via pskb_may_pull() 445 */ 446 SKB_DROP_REASON_HDR_TRUNC, 447 /** 448 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 449 * to tun/tap, e.g., via TUNSETFILTEREBPF 450 */ 451 SKB_DROP_REASON_TAP_FILTER, 452 /** 453 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 454 * tun/tap, e.g., check_filter() 455 */ 456 SKB_DROP_REASON_TAP_TXFILTER, 457 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 458 SKB_DROP_REASON_ICMP_CSUM, 459 /** 460 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 461 * such as a broadcasts ICMP_TIMESTAMP 462 */ 463 SKB_DROP_REASON_INVALID_PROTO, 464 /** 465 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 466 * IPSTATS_MIB_INADDRERRORS 467 */ 468 SKB_DROP_REASON_IP_INADDRERRORS, 469 /** 470 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 471 * IPSTATS_MIB_INADDRERRORS 472 */ 473 SKB_DROP_REASON_IP_INNOROUTES, 474 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 475 SKB_DROP_REASON_IP_LOCAL_SOURCE, 476 /** 477 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 478 * 1) source ip is multicast or limited broadcast 479 * 2) source ip is zero and not IGMP 480 */ 481 SKB_DROP_REASON_IP_INVALID_SOURCE, 482 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 483 SKB_DROP_REASON_IP_LOCALNET, 484 /** 485 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 486 * 1) dest ip is 0 487 */ 488 SKB_DROP_REASON_IP_INVALID_DEST, 489 /** 490 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 491 * MTU) 492 */ 493 SKB_DROP_REASON_PKT_TOO_BIG, 494 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 495 SKB_DROP_REASON_DUP_FRAG, 496 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 497 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 498 /** 499 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 500 * (/proc/sys/net/ipv4/ipfrag_max_dist) 501 */ 502 SKB_DROP_REASON_FRAG_TOO_FAR, 503 /** 504 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 505 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 506 */ 507 SKB_DROP_REASON_TCP_MINTTL, 508 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 509 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 510 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 511 SKB_DROP_REASON_IPV6_NDISC_FRAG, 512 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 513 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 514 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 515 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 516 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 517 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 518 /** 519 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 520 * for another host. 521 */ 522 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 523 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 524 SKB_DROP_REASON_QUEUE_PURGE, 525 /** 526 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 527 * processing a tc ext cookie. 528 */ 529 SKB_DROP_REASON_TC_COOKIE_ERROR, 530 /** 531 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 532 * after its filter matches an incoming packet. 533 */ 534 SKB_DROP_REASON_PACKET_SOCK_ERROR, 535 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 536 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 537 /** 538 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 539 * iterations. 540 */ 541 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 542 /** 543 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 544 * 1) reserved fields are not zero 545 * 2) "I" flag is not set 546 */ 547 SKB_DROP_REASON_VXLAN_INVALID_HDR, 548 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 549 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 550 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 551 SKB_DROP_REASON_MAC_INVALID_SOURCE, 552 /** 553 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 554 * entry or an entry pointing to a nexthop. 555 */ 556 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 557 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 558 SKB_DROP_REASON_NO_TX_TARGET, 559 /** 560 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 561 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 562 */ 563 SKB_DROP_REASON_IP_TUNNEL_ECN, 564 /** 565 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 566 * reached a device which is in "external" mode. 567 */ 568 SKB_DROP_REASON_TUNNEL_TXINFO, 569 /** 570 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 571 * the MAC address of the local netdev. 572 */ 573 SKB_DROP_REASON_LOCAL_MAC, 574 /** 575 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 576 * forwarded to the in_dev, and the proxy_arp_pvlan is not 577 * enabled. 578 */ 579 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 580 /** 581 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 582 * is an IEEE MAC Control address. 583 */ 584 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 585 /** 586 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 587 * ingress bridge port does not allow frames to be forwarded. 588 */ 589 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 590 /** 591 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 592 * non conform CAN frame (or device is unable to receive CAN frames) 593 */ 594 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 595 /** 596 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 597 * non conform CAN-FD frame (or device is unable to receive CAN frames) 598 */ 599 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 600 /** 601 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 602 * non conform CAN-XL frame (or device is unable to receive CAN frames) 603 */ 604 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 605 /** 606 * @SKB_DROP_REASON_PFMEMALLOC: packet allocated from memory reserve 607 * reached a path or socket not eligible for use of memory reserves 608 */ 609 SKB_DROP_REASON_PFMEMALLOC, 610 /** 611 * @SKB_DROP_REASON_DUALPI2_STEP_DROP: dropped by the step drop 612 * threshold of DualPI2 qdisc. 613 */ 614 SKB_DROP_REASON_DUALPI2_STEP_DROP, 615 /** @SKB_DROP_REASON_PSP_INPUT: PSP input checks failed */ 616 SKB_DROP_REASON_PSP_INPUT, 617 /** @SKB_DROP_REASON_PSP_OUTPUT: PSP output checks failed */ 618 SKB_DROP_REASON_PSP_OUTPUT, 619 /** 620 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 621 * shouldn't be used as a real 'reason' - only for tracing code gen 622 */ 623 SKB_DROP_REASON_MAX, 624 625 /** 626 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 627 * see &enum skb_drop_reason_subsys 628 */ 629 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 630 }; 631 632 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 633 634 #define SKB_DR_INIT(name, reason) \ 635 enum skb_drop_reason name = SKB_DROP_REASON_##reason 636 #define SKB_DR(name) \ 637 SKB_DR_INIT(name, NOT_SPECIFIED) 638 #define SKB_DR_SET(name, reason) \ 639 (name = SKB_DROP_REASON_##reason) 640 #define SKB_DR_OR(name, reason) \ 641 do { \ 642 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 643 name == SKB_NOT_DROPPED_YET) \ 644 SKB_DR_SET(name, reason); \ 645 } while (0) 646 647 #endif 648