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_BURST_DROP) \ 71 FN(CPU_BACKLOG) \ 72 FN(MACVLAN_BROADCAST_BACKLOG) \ 73 FN(IPVLAN_MULTICAST_BACKLOG) \ 74 FN(XDP) \ 75 FN(TC_INGRESS) \ 76 FN(UNHANDLED_PROTO) \ 77 FN(SKB_CSUM) \ 78 FN(SKB_GSO_SEG) \ 79 FN(SKB_BAD_GSO) \ 80 FN(SKB_UCOPY_FAULT) \ 81 FN(DEV_HDR) \ 82 FN(DEV_READY) \ 83 FN(FULL_RING) \ 84 FN(NOMEM) \ 85 FN(HDR_TRUNC) \ 86 FN(TAP_FILTER) \ 87 FN(TAP_TXFILTER) \ 88 FN(ICMP_CSUM) \ 89 FN(INVALID_PROTO) \ 90 FN(IP_INADDRERRORS) \ 91 FN(IP_INNOROUTES) \ 92 FN(IP_LOCAL_SOURCE) \ 93 FN(IP_INVALID_SOURCE) \ 94 FN(IP_LOCALNET) \ 95 FN(IP_INVALID_DEST) \ 96 FN(PKT_TOO_BIG) \ 97 FN(DUP_FRAG) \ 98 FN(FRAG_REASM_TIMEOUT) \ 99 FN(FRAG_TOO_FAR) \ 100 FN(TCP_MINTTL) \ 101 FN(IPV6_BAD_EXTHDR) \ 102 FN(IPV6_TOO_MANY_EXTHDRS) \ 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 FN(PFMEMALLOC) \ 128 FN(PSP_INPUT) \ 129 FN(PSP_OUTPUT) \ 130 FN(RECURSION_LIMIT) \ 131 FNe(MAX) 132 133 /** 134 * enum skb_drop_reason - the reasons of skb drops 135 * 136 * The reason of skb drop, which is used in kfree_skb_reason(). 137 */ 138 enum skb_drop_reason { 139 /** 140 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 141 */ 142 SKB_NOT_DROPPED_YET = 0, 143 /** @SKB_CONSUMED: packet has been consumed */ 144 SKB_CONSUMED, 145 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 146 SKB_DROP_REASON_NOT_SPECIFIED, 147 /** 148 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 149 * Reason could be one of three cases: 150 * 1) no established/listening socket found during lookup process 151 * 2) no valid request socket during 3WHS process 152 * 3) no valid child socket during 3WHS process 153 */ 154 SKB_DROP_REASON_NO_SOCKET, 155 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 156 SKB_DROP_REASON_SOCKET_CLOSE, 157 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 158 SKB_DROP_REASON_SOCKET_FILTER, 159 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 160 SKB_DROP_REASON_SOCKET_RCVBUFF, 161 /** 162 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 163 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 164 * during send() that the peer has been close()d. 165 */ 166 SKB_DROP_REASON_UNIX_DISCONNECT, 167 /** 168 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 169 * recv() without MSG_OOB so dropped. 170 */ 171 SKB_DROP_REASON_UNIX_SKIP_OOB, 172 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 173 SKB_DROP_REASON_PKT_TOO_SMALL, 174 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 175 SKB_DROP_REASON_TCP_CSUM, 176 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 177 SKB_DROP_REASON_UDP_CSUM, 178 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 179 SKB_DROP_REASON_NETFILTER_DROP, 180 /** 181 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 182 * (interface is in promisc mode) 183 */ 184 SKB_DROP_REASON_OTHERHOST, 185 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 186 SKB_DROP_REASON_IP_CSUM, 187 /** 188 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 189 * IPSTATS_MIB_INHDRERRORS) 190 */ 191 SKB_DROP_REASON_IP_INHDR, 192 /** 193 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 194 * document for rp_filter in ip-sysctl.rst for more information 195 */ 196 SKB_DROP_REASON_IP_RPFILTER, 197 /** 198 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 199 * multicast, but L3 is unicast. 200 */ 201 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 202 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 203 SKB_DROP_REASON_XFRM_POLICY, 204 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 205 SKB_DROP_REASON_IP_NOPROTO, 206 /** 207 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 208 * udp packet drop out of udp_memory_allocated. 209 */ 210 SKB_DROP_REASON_PROTO_MEM, 211 /** 212 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 213 * twice or set incorrectly. 214 */ 215 SKB_DROP_REASON_TCP_AUTH_HDR, 216 /** 217 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 218 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 219 */ 220 SKB_DROP_REASON_TCP_MD5NOTFOUND, 221 /** 222 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 223 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 224 */ 225 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 226 /** 227 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 228 * to LINUX_MIB_TCPMD5FAILURE 229 */ 230 SKB_DROP_REASON_TCP_MD5FAILURE, 231 /** 232 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 233 * corresponding to LINUX_MIB_TCPAOREQUIRED 234 */ 235 SKB_DROP_REASON_TCP_AONOTFOUND, 236 /** 237 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 238 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 239 */ 240 SKB_DROP_REASON_TCP_AOUNEXPECTED, 241 /** 242 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 243 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 244 */ 245 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 246 /** 247 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 248 * corresponding to LINUX_MIB_TCPAOBAD 249 */ 250 SKB_DROP_REASON_TCP_AOFAILURE, 251 /** 252 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 253 * see LINUX_MIB_TCPBACKLOGDROP) 254 */ 255 SKB_DROP_REASON_SOCKET_BACKLOG, 256 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 257 SKB_DROP_REASON_TCP_FLAGS, 258 /** 259 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 260 * LINUX_MIB_TCPABORTONDATA 261 */ 262 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 263 /** 264 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 265 * see LINUX_MIB_TCPZEROWINDOWDROP 266 */ 267 SKB_DROP_REASON_TCP_ZEROWINDOW, 268 /** 269 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 270 * received before (spurious retrans may happened), see 271 * LINUX_MIB_DELAYEDACKLOST 272 */ 273 SKB_DROP_REASON_TCP_OLD_DATA, 274 /** 275 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 276 * the seq of the first byte exceed the right edges of receive 277 * window 278 */ 279 SKB_DROP_REASON_TCP_OVERWINDOW, 280 /** 281 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 282 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 283 */ 284 SKB_DROP_REASON_TCP_OFOMERGE, 285 /** 286 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 287 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 288 */ 289 SKB_DROP_REASON_TCP_RFC7323_PAWS, 290 /** 291 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 292 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 293 */ 294 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 295 /** 296 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 297 * TIME_WAIT state. 298 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 299 */ 300 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 301 /** 302 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 303 * Corresponds to LINUX_MIB_TSECRREJECTED. 304 */ 305 SKB_DROP_REASON_TCP_RFC7323_TSECR, 306 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 307 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 308 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 309 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 310 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field. */ 311 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 312 /** 313 * @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE: 314 * Not acceptable END_SEQ field. 315 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 316 */ 317 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 318 /** 319 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 320 * field because ack sequence is not in the window between snd_una 321 * and snd_nxt 322 */ 323 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 324 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 325 SKB_DROP_REASON_TCP_RESET, 326 /** 327 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 328 * SYN flag 329 */ 330 SKB_DROP_REASON_TCP_INVALID_SYN, 331 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 332 SKB_DROP_REASON_TCP_CLOSE, 333 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 334 SKB_DROP_REASON_TCP_FASTOPEN, 335 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 336 SKB_DROP_REASON_TCP_OLD_ACK, 337 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 338 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 339 /** 340 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 341 * sent yet 342 */ 343 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 344 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 345 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 346 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 347 SKB_DROP_REASON_TCP_OFO_DROP, 348 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 349 SKB_DROP_REASON_IP_OUTNOROUTES, 350 /** 351 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 352 * eBPF program 353 */ 354 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 355 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 356 SKB_DROP_REASON_IPV6DISABLED, 357 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 358 SKB_DROP_REASON_NEIGH_CREATEFAIL, 359 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 360 SKB_DROP_REASON_NEIGH_FAILED, 361 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 362 SKB_DROP_REASON_NEIGH_QUEUEFULL, 363 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 364 SKB_DROP_REASON_NEIGH_DEAD, 365 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 366 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 367 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 368 SKB_DROP_REASON_TC_EGRESS, 369 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 370 SKB_DROP_REASON_SECURITY_HOOK, 371 /** 372 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc during enqueue or 373 * dequeue. More specific drop reasons are available via the 374 * qdisc:qdisc_drop tracepoint, which also provides qdisc handle 375 * and name for identifying the source. 376 */ 377 SKB_DROP_REASON_QDISC_DROP, 378 /** 379 * @SKB_DROP_REASON_QDISC_BURST_DROP: dropped when net.core.qdisc_max_burst 380 * limit is hit. 381 */ 382 SKB_DROP_REASON_QDISC_BURST_DROP, 383 /** 384 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 385 * backlog queue. This can be caused by backlog queue full (see 386 * netdev_max_backlog in net.rst) or RPS flow limit 387 */ 388 SKB_DROP_REASON_CPU_BACKLOG, 389 /** 390 * @SKB_DROP_REASON_MACVLAN_BROADCAST_BACKLOG: failed to enqueue the skb 391 * to macvlan broadcast queue. 392 */ 393 SKB_DROP_REASON_MACVLAN_BROADCAST_BACKLOG, 394 /** 395 * @SKB_DROP_REASON_IPVLAN_MULTICAST_BACKLOG: failed to enqueue the skb 396 * to ipvlan multicast queue. 397 */ 398 SKB_DROP_REASON_IPVLAN_MULTICAST_BACKLOG, 399 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 400 SKB_DROP_REASON_XDP, 401 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 402 SKB_DROP_REASON_TC_INGRESS, 403 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 404 SKB_DROP_REASON_UNHANDLED_PROTO, 405 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 406 SKB_DROP_REASON_SKB_CSUM, 407 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 408 SKB_DROP_REASON_SKB_GSO_SEG, 409 /** @SKB_DROP_REASON_SKB_BAD_GSO: malicious gso packet. */ 410 SKB_DROP_REASON_SKB_BAD_GSO, 411 /** 412 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 413 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 414 */ 415 SKB_DROP_REASON_SKB_UCOPY_FAULT, 416 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 417 SKB_DROP_REASON_DEV_HDR, 418 /** 419 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 420 * any of its data structure that is not up/ready/initialized, 421 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 422 * is not initialized 423 */ 424 SKB_DROP_REASON_DEV_READY, 425 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 426 SKB_DROP_REASON_FULL_RING, 427 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 428 SKB_DROP_REASON_NOMEM, 429 /** 430 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 431 * networking data, e.g., failed to pull the protocol header from 432 * frags via pskb_may_pull() 433 */ 434 SKB_DROP_REASON_HDR_TRUNC, 435 /** 436 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 437 * to tun/tap, e.g., via TUNSETFILTEREBPF 438 */ 439 SKB_DROP_REASON_TAP_FILTER, 440 /** 441 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 442 * tun/tap, e.g., check_filter() 443 */ 444 SKB_DROP_REASON_TAP_TXFILTER, 445 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 446 SKB_DROP_REASON_ICMP_CSUM, 447 /** 448 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 449 * such as a broadcasts ICMP_TIMESTAMP 450 */ 451 SKB_DROP_REASON_INVALID_PROTO, 452 /** 453 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 454 * IPSTATS_MIB_INADDRERRORS 455 */ 456 SKB_DROP_REASON_IP_INADDRERRORS, 457 /** 458 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 459 * IPSTATS_MIB_INADDRERRORS 460 */ 461 SKB_DROP_REASON_IP_INNOROUTES, 462 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 463 SKB_DROP_REASON_IP_LOCAL_SOURCE, 464 /** 465 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 466 * 1) source ip is multicast or limited broadcast 467 * 2) source ip is zero and not IGMP 468 */ 469 SKB_DROP_REASON_IP_INVALID_SOURCE, 470 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 471 SKB_DROP_REASON_IP_LOCALNET, 472 /** 473 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 474 * 1) dest ip is 0 475 */ 476 SKB_DROP_REASON_IP_INVALID_DEST, 477 /** 478 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 479 * MTU) 480 */ 481 SKB_DROP_REASON_PKT_TOO_BIG, 482 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 483 SKB_DROP_REASON_DUP_FRAG, 484 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 485 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 486 /** 487 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 488 * (/proc/sys/net/ipv4/ipfrag_max_dist) 489 */ 490 SKB_DROP_REASON_FRAG_TOO_FAR, 491 /** 492 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 493 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 494 */ 495 SKB_DROP_REASON_TCP_MINTTL, 496 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 497 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 498 /** 499 * @SKB_DROP_REASON_IPV6_TOO_MANY_EXTHDRS: Number of IPv6 extension 500 * headers in the packet exceeds IP6_MAX_EXT_HDRS_CNT. 501 */ 502 SKB_DROP_REASON_IPV6_TOO_MANY_EXTHDRS, 503 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 504 SKB_DROP_REASON_IPV6_NDISC_FRAG, 505 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 506 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 507 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 508 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 509 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 510 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 511 /** 512 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 513 * for another host. 514 */ 515 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 516 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 517 SKB_DROP_REASON_QUEUE_PURGE, 518 /** 519 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 520 * processing a tc ext cookie. 521 */ 522 SKB_DROP_REASON_TC_COOKIE_ERROR, 523 /** 524 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 525 * after its filter matches an incoming packet. 526 */ 527 SKB_DROP_REASON_PACKET_SOCK_ERROR, 528 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 529 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 530 /** 531 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 532 * iterations. 533 */ 534 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 535 /** 536 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 537 * 1) reserved fields are not zero 538 * 2) "I" flag is not set 539 */ 540 SKB_DROP_REASON_VXLAN_INVALID_HDR, 541 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 542 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 543 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 544 SKB_DROP_REASON_MAC_INVALID_SOURCE, 545 /** 546 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 547 * entry or an entry pointing to a nexthop. 548 */ 549 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 550 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 551 SKB_DROP_REASON_NO_TX_TARGET, 552 /** 553 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 554 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 555 */ 556 SKB_DROP_REASON_IP_TUNNEL_ECN, 557 /** 558 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 559 * reached a device which is in "external" mode. 560 */ 561 SKB_DROP_REASON_TUNNEL_TXINFO, 562 /** 563 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 564 * the MAC address of the local netdev. 565 */ 566 SKB_DROP_REASON_LOCAL_MAC, 567 /** 568 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 569 * forwarded to the in_dev, and the proxy_arp_pvlan is not 570 * enabled. 571 */ 572 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 573 /** 574 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 575 * is an IEEE MAC Control address. 576 */ 577 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 578 /** 579 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 580 * ingress bridge port does not allow frames to be forwarded. 581 */ 582 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 583 /** 584 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 585 * non conform CAN frame (or device is unable to receive CAN frames) 586 */ 587 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 588 /** 589 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 590 * non conform CAN-FD frame (or device is unable to receive CAN frames) 591 */ 592 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 593 /** 594 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 595 * non conform CAN-XL frame (or device is unable to receive CAN frames) 596 */ 597 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 598 /** 599 * @SKB_DROP_REASON_PFMEMALLOC: packet allocated from memory reserve 600 * reached a path or socket not eligible for use of memory reserves 601 */ 602 SKB_DROP_REASON_PFMEMALLOC, 603 /** @SKB_DROP_REASON_PSP_INPUT: PSP input checks failed */ 604 SKB_DROP_REASON_PSP_INPUT, 605 /** @SKB_DROP_REASON_PSP_OUTPUT: PSP output checks failed */ 606 SKB_DROP_REASON_PSP_OUTPUT, 607 /** @SKB_DROP_REASON_RECURSION_LIMIT: Dead loop on virtual device. */ 608 SKB_DROP_REASON_RECURSION_LIMIT, 609 /** 610 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 611 * shouldn't be used as a real 'reason' - only for tracing code gen 612 */ 613 SKB_DROP_REASON_MAX, 614 615 /** 616 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 617 * see &enum skb_drop_reason_subsys 618 */ 619 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 620 }; 621 622 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 623 624 #define SKB_DR_INIT(name, reason) \ 625 enum skb_drop_reason name = SKB_DROP_REASON_##reason 626 #define SKB_DR(name) \ 627 SKB_DR_INIT(name, NOT_SPECIFIED) 628 #define SKB_DR_SET(name, reason) \ 629 (name = SKB_DROP_REASON_##reason) 630 #define SKB_DR_OR(name, reason) \ 631 do { \ 632 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 633 name == SKB_NOT_DROPPED_YET) \ 634 SKB_DR_SET(name, reason); \ 635 } while (0) 636 637 #endif 638