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