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(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 FN(CAN_RX_INVALID_FRAME) \ 121 FN(CANFD_RX_INVALID_FRAME) \ 122 FN(CANXL_RX_INVALID_FRAME) \ 123 FN(PFMEMALLOC) \ 124 FN(PSP_INPUT) \ 125 FN(PSP_OUTPUT) \ 126 FN(RECURSION_LIMIT) \ 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_END_SEQUENCE: 310 * Not acceptable END_SEQ field. 311 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 312 */ 313 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 314 /** 315 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 316 * field because ack sequence is not in the window between snd_una 317 * and snd_nxt 318 */ 319 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 320 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 321 SKB_DROP_REASON_TCP_RESET, 322 /** 323 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 324 * SYN flag 325 */ 326 SKB_DROP_REASON_TCP_INVALID_SYN, 327 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 328 SKB_DROP_REASON_TCP_CLOSE, 329 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 330 SKB_DROP_REASON_TCP_FASTOPEN, 331 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 332 SKB_DROP_REASON_TCP_OLD_ACK, 333 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 334 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 335 /** 336 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 337 * sent yet 338 */ 339 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 340 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 341 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 342 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 343 SKB_DROP_REASON_TCP_OFO_DROP, 344 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 345 SKB_DROP_REASON_IP_OUTNOROUTES, 346 /** 347 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 348 * eBPF program 349 */ 350 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 351 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 352 SKB_DROP_REASON_IPV6DISABLED, 353 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 354 SKB_DROP_REASON_NEIGH_CREATEFAIL, 355 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 356 SKB_DROP_REASON_NEIGH_FAILED, 357 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 358 SKB_DROP_REASON_NEIGH_QUEUEFULL, 359 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 360 SKB_DROP_REASON_NEIGH_DEAD, 361 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 362 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 363 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 364 SKB_DROP_REASON_TC_EGRESS, 365 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 366 SKB_DROP_REASON_SECURITY_HOOK, 367 /** 368 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc during enqueue or 369 * dequeue. More specific drop reasons are available via the 370 * qdisc:qdisc_drop tracepoint, which also provides qdisc handle 371 * and name for identifying the source. 372 */ 373 SKB_DROP_REASON_QDISC_DROP, 374 /** 375 * @SKB_DROP_REASON_QDISC_BURST_DROP: dropped when net.core.qdisc_max_burst 376 * limit is hit. 377 */ 378 SKB_DROP_REASON_QDISC_BURST_DROP, 379 /** 380 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 381 * backlog queue. This can be caused by backlog queue full (see 382 * netdev_max_backlog in net.rst) or RPS flow limit 383 */ 384 SKB_DROP_REASON_CPU_BACKLOG, 385 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 386 SKB_DROP_REASON_XDP, 387 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 388 SKB_DROP_REASON_TC_INGRESS, 389 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 390 SKB_DROP_REASON_UNHANDLED_PROTO, 391 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 392 SKB_DROP_REASON_SKB_CSUM, 393 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 394 SKB_DROP_REASON_SKB_GSO_SEG, 395 /** 396 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 397 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 398 */ 399 SKB_DROP_REASON_SKB_UCOPY_FAULT, 400 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 401 SKB_DROP_REASON_DEV_HDR, 402 /** 403 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 404 * any of its data structure that is not up/ready/initialized, 405 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 406 * is not initialized 407 */ 408 SKB_DROP_REASON_DEV_READY, 409 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 410 SKB_DROP_REASON_FULL_RING, 411 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 412 SKB_DROP_REASON_NOMEM, 413 /** 414 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 415 * networking data, e.g., failed to pull the protocol header from 416 * frags via pskb_may_pull() 417 */ 418 SKB_DROP_REASON_HDR_TRUNC, 419 /** 420 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 421 * to tun/tap, e.g., via TUNSETFILTEREBPF 422 */ 423 SKB_DROP_REASON_TAP_FILTER, 424 /** 425 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 426 * tun/tap, e.g., check_filter() 427 */ 428 SKB_DROP_REASON_TAP_TXFILTER, 429 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 430 SKB_DROP_REASON_ICMP_CSUM, 431 /** 432 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 433 * such as a broadcasts ICMP_TIMESTAMP 434 */ 435 SKB_DROP_REASON_INVALID_PROTO, 436 /** 437 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 438 * IPSTATS_MIB_INADDRERRORS 439 */ 440 SKB_DROP_REASON_IP_INADDRERRORS, 441 /** 442 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 443 * IPSTATS_MIB_INADDRERRORS 444 */ 445 SKB_DROP_REASON_IP_INNOROUTES, 446 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 447 SKB_DROP_REASON_IP_LOCAL_SOURCE, 448 /** 449 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 450 * 1) source ip is multicast or limited broadcast 451 * 2) source ip is zero and not IGMP 452 */ 453 SKB_DROP_REASON_IP_INVALID_SOURCE, 454 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 455 SKB_DROP_REASON_IP_LOCALNET, 456 /** 457 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 458 * 1) dest ip is 0 459 */ 460 SKB_DROP_REASON_IP_INVALID_DEST, 461 /** 462 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 463 * MTU) 464 */ 465 SKB_DROP_REASON_PKT_TOO_BIG, 466 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 467 SKB_DROP_REASON_DUP_FRAG, 468 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 469 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 470 /** 471 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 472 * (/proc/sys/net/ipv4/ipfrag_max_dist) 473 */ 474 SKB_DROP_REASON_FRAG_TOO_FAR, 475 /** 476 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 477 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 478 */ 479 SKB_DROP_REASON_TCP_MINTTL, 480 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 481 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 482 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 483 SKB_DROP_REASON_IPV6_NDISC_FRAG, 484 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 485 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 486 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 487 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 488 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 489 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 490 /** 491 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 492 * for another host. 493 */ 494 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 495 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 496 SKB_DROP_REASON_QUEUE_PURGE, 497 /** 498 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 499 * processing a tc ext cookie. 500 */ 501 SKB_DROP_REASON_TC_COOKIE_ERROR, 502 /** 503 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 504 * after its filter matches an incoming packet. 505 */ 506 SKB_DROP_REASON_PACKET_SOCK_ERROR, 507 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 508 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 509 /** 510 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 511 * iterations. 512 */ 513 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 514 /** 515 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 516 * 1) reserved fields are not zero 517 * 2) "I" flag is not set 518 */ 519 SKB_DROP_REASON_VXLAN_INVALID_HDR, 520 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 521 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 522 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 523 SKB_DROP_REASON_MAC_INVALID_SOURCE, 524 /** 525 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 526 * entry or an entry pointing to a nexthop. 527 */ 528 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 529 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 530 SKB_DROP_REASON_NO_TX_TARGET, 531 /** 532 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 533 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 534 */ 535 SKB_DROP_REASON_IP_TUNNEL_ECN, 536 /** 537 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 538 * reached a device which is in "external" mode. 539 */ 540 SKB_DROP_REASON_TUNNEL_TXINFO, 541 /** 542 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 543 * the MAC address of the local netdev. 544 */ 545 SKB_DROP_REASON_LOCAL_MAC, 546 /** 547 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 548 * forwarded to the in_dev, and the proxy_arp_pvlan is not 549 * enabled. 550 */ 551 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 552 /** 553 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 554 * is an IEEE MAC Control address. 555 */ 556 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 557 /** 558 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 559 * ingress bridge port does not allow frames to be forwarded. 560 */ 561 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 562 /** 563 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 564 * non conform CAN frame (or device is unable to receive CAN frames) 565 */ 566 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 567 /** 568 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 569 * non conform CAN-FD frame (or device is unable to receive CAN frames) 570 */ 571 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 572 /** 573 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 574 * non conform CAN-XL frame (or device is unable to receive CAN frames) 575 */ 576 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 577 /** 578 * @SKB_DROP_REASON_PFMEMALLOC: packet allocated from memory reserve 579 * reached a path or socket not eligible for use of memory reserves 580 */ 581 SKB_DROP_REASON_PFMEMALLOC, 582 /** @SKB_DROP_REASON_PSP_INPUT: PSP input checks failed */ 583 SKB_DROP_REASON_PSP_INPUT, 584 /** @SKB_DROP_REASON_PSP_OUTPUT: PSP output checks failed */ 585 SKB_DROP_REASON_PSP_OUTPUT, 586 /** @SKB_DROP_REASON_RECURSION_LIMIT: Dead loop on virtual device. */ 587 SKB_DROP_REASON_RECURSION_LIMIT, 588 /** 589 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 590 * shouldn't be used as a real 'reason' - only for tracing code gen 591 */ 592 SKB_DROP_REASON_MAX, 593 594 /** 595 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 596 * see &enum skb_drop_reason_subsys 597 */ 598 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 599 }; 600 601 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 602 603 #define SKB_DR_INIT(name, reason) \ 604 enum skb_drop_reason name = SKB_DROP_REASON_##reason 605 #define SKB_DR(name) \ 606 SKB_DR_INIT(name, NOT_SPECIFIED) 607 #define SKB_DR_SET(name, reason) \ 608 (name = SKB_DROP_REASON_##reason) 609 #define SKB_DR_OR(name, reason) \ 610 do { \ 611 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 612 name == SKB_NOT_DROPPED_YET) \ 613 SKB_DR_SET(name, reason); \ 614 } while (0) 615 616 #endif 617