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