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_NDISC_FRAG) \ 103 FN(IPV6_NDISC_HOP_LIMIT) \ 104 FN(IPV6_NDISC_BAD_CODE) \ 105 FN(IPV6_NDISC_BAD_OPTIONS) \ 106 FN(IPV6_NDISC_NS_OTHERHOST) \ 107 FN(QUEUE_PURGE) \ 108 FN(TC_COOKIE_ERROR) \ 109 FN(PACKET_SOCK_ERROR) \ 110 FN(TC_CHAIN_NOTFOUND) \ 111 FN(TC_RECLASSIFY_LOOP) \ 112 FN(VXLAN_INVALID_HDR) \ 113 FN(VXLAN_VNI_NOT_FOUND) \ 114 FN(MAC_INVALID_SOURCE) \ 115 FN(VXLAN_ENTRY_EXISTS) \ 116 FN(NO_TX_TARGET) \ 117 FN(IP_TUNNEL_ECN) \ 118 FN(TUNNEL_TXINFO) \ 119 FN(LOCAL_MAC) \ 120 FN(ARP_PVLAN_DISABLE) \ 121 FN(MAC_IEEE_MAC_CONTROL) \ 122 FN(BRIDGE_INGRESS_STP_STATE) \ 123 FN(CAN_RX_INVALID_FRAME) \ 124 FN(CANFD_RX_INVALID_FRAME) \ 125 FN(CANXL_RX_INVALID_FRAME) \ 126 FN(PFMEMALLOC) \ 127 FN(PSP_INPUT) \ 128 FN(PSP_OUTPUT) \ 129 FN(RECURSION_LIMIT) \ 130 FNe(MAX) 131 132 /** 133 * enum skb_drop_reason - the reasons of skb drops 134 * 135 * The reason of skb drop, which is used in kfree_skb_reason(). 136 */ 137 enum skb_drop_reason { 138 /** 139 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 140 */ 141 SKB_NOT_DROPPED_YET = 0, 142 /** @SKB_CONSUMED: packet has been consumed */ 143 SKB_CONSUMED, 144 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 145 SKB_DROP_REASON_NOT_SPECIFIED, 146 /** 147 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 148 * Reason could be one of three cases: 149 * 1) no established/listening socket found during lookup process 150 * 2) no valid request socket during 3WHS process 151 * 3) no valid child socket during 3WHS process 152 */ 153 SKB_DROP_REASON_NO_SOCKET, 154 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 155 SKB_DROP_REASON_SOCKET_CLOSE, 156 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 157 SKB_DROP_REASON_SOCKET_FILTER, 158 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 159 SKB_DROP_REASON_SOCKET_RCVBUFF, 160 /** 161 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 162 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 163 * during send() that the peer has been close()d. 164 */ 165 SKB_DROP_REASON_UNIX_DISCONNECT, 166 /** 167 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 168 * recv() without MSG_OOB so dropped. 169 */ 170 SKB_DROP_REASON_UNIX_SKIP_OOB, 171 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 172 SKB_DROP_REASON_PKT_TOO_SMALL, 173 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 174 SKB_DROP_REASON_TCP_CSUM, 175 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 176 SKB_DROP_REASON_UDP_CSUM, 177 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 178 SKB_DROP_REASON_NETFILTER_DROP, 179 /** 180 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 181 * (interface is in promisc mode) 182 */ 183 SKB_DROP_REASON_OTHERHOST, 184 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 185 SKB_DROP_REASON_IP_CSUM, 186 /** 187 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 188 * IPSTATS_MIB_INHDRERRORS) 189 */ 190 SKB_DROP_REASON_IP_INHDR, 191 /** 192 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 193 * document for rp_filter in ip-sysctl.rst for more information 194 */ 195 SKB_DROP_REASON_IP_RPFILTER, 196 /** 197 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 198 * multicast, but L3 is unicast. 199 */ 200 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 201 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 202 SKB_DROP_REASON_XFRM_POLICY, 203 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 204 SKB_DROP_REASON_IP_NOPROTO, 205 /** 206 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 207 * udp packet drop out of udp_memory_allocated. 208 */ 209 SKB_DROP_REASON_PROTO_MEM, 210 /** 211 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 212 * twice or set incorrectly. 213 */ 214 SKB_DROP_REASON_TCP_AUTH_HDR, 215 /** 216 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 217 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 218 */ 219 SKB_DROP_REASON_TCP_MD5NOTFOUND, 220 /** 221 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 222 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 223 */ 224 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 225 /** 226 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 227 * to LINUX_MIB_TCPMD5FAILURE 228 */ 229 SKB_DROP_REASON_TCP_MD5FAILURE, 230 /** 231 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 232 * corresponding to LINUX_MIB_TCPAOREQUIRED 233 */ 234 SKB_DROP_REASON_TCP_AONOTFOUND, 235 /** 236 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 237 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 238 */ 239 SKB_DROP_REASON_TCP_AOUNEXPECTED, 240 /** 241 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 242 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 243 */ 244 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 245 /** 246 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 247 * corresponding to LINUX_MIB_TCPAOBAD 248 */ 249 SKB_DROP_REASON_TCP_AOFAILURE, 250 /** 251 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 252 * see LINUX_MIB_TCPBACKLOGDROP) 253 */ 254 SKB_DROP_REASON_SOCKET_BACKLOG, 255 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 256 SKB_DROP_REASON_TCP_FLAGS, 257 /** 258 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 259 * LINUX_MIB_TCPABORTONDATA 260 */ 261 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 262 /** 263 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 264 * see LINUX_MIB_TCPZEROWINDOWDROP 265 */ 266 SKB_DROP_REASON_TCP_ZEROWINDOW, 267 /** 268 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 269 * received before (spurious retrans may happened), see 270 * LINUX_MIB_DELAYEDACKLOST 271 */ 272 SKB_DROP_REASON_TCP_OLD_DATA, 273 /** 274 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 275 * the seq of the first byte exceed the right edges of receive 276 * window 277 */ 278 SKB_DROP_REASON_TCP_OVERWINDOW, 279 /** 280 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 281 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 282 */ 283 SKB_DROP_REASON_TCP_OFOMERGE, 284 /** 285 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 286 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 287 */ 288 SKB_DROP_REASON_TCP_RFC7323_PAWS, 289 /** 290 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 291 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 292 */ 293 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 294 /** 295 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 296 * TIME_WAIT state. 297 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 298 */ 299 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 300 /** 301 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 302 * Corresponds to LINUX_MIB_TSECRREJECTED. 303 */ 304 SKB_DROP_REASON_TCP_RFC7323_TSECR, 305 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 306 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 307 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 308 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 309 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field. */ 310 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 311 /** 312 * @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE: 313 * Not acceptable END_SEQ field. 314 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 315 */ 316 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 317 /** 318 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 319 * field because ack sequence is not in the window between snd_una 320 * and snd_nxt 321 */ 322 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 323 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 324 SKB_DROP_REASON_TCP_RESET, 325 /** 326 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 327 * SYN flag 328 */ 329 SKB_DROP_REASON_TCP_INVALID_SYN, 330 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 331 SKB_DROP_REASON_TCP_CLOSE, 332 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 333 SKB_DROP_REASON_TCP_FASTOPEN, 334 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 335 SKB_DROP_REASON_TCP_OLD_ACK, 336 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 337 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 338 /** 339 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 340 * sent yet 341 */ 342 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 343 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 344 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 345 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 346 SKB_DROP_REASON_TCP_OFO_DROP, 347 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 348 SKB_DROP_REASON_IP_OUTNOROUTES, 349 /** 350 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 351 * eBPF program 352 */ 353 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 354 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 355 SKB_DROP_REASON_IPV6DISABLED, 356 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 357 SKB_DROP_REASON_NEIGH_CREATEFAIL, 358 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 359 SKB_DROP_REASON_NEIGH_FAILED, 360 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 361 SKB_DROP_REASON_NEIGH_QUEUEFULL, 362 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 363 SKB_DROP_REASON_NEIGH_DEAD, 364 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 365 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 366 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 367 SKB_DROP_REASON_TC_EGRESS, 368 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 369 SKB_DROP_REASON_SECURITY_HOOK, 370 /** 371 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc during enqueue or 372 * dequeue. More specific drop reasons are available via the 373 * qdisc:qdisc_drop tracepoint, which also provides qdisc handle 374 * and name for identifying the source. 375 */ 376 SKB_DROP_REASON_QDISC_DROP, 377 /** 378 * @SKB_DROP_REASON_QDISC_BURST_DROP: dropped when net.core.qdisc_max_burst 379 * limit is hit. 380 */ 381 SKB_DROP_REASON_QDISC_BURST_DROP, 382 /** 383 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 384 * backlog queue. This can be caused by backlog queue full (see 385 * netdev_max_backlog in net.rst) or RPS flow limit 386 */ 387 SKB_DROP_REASON_CPU_BACKLOG, 388 /** 389 * @SKB_DROP_REASON_MACVLAN_BROADCAST_BACKLOG: failed to enqueue the skb 390 * to macvlan broadcast queue. 391 */ 392 SKB_DROP_REASON_MACVLAN_BROADCAST_BACKLOG, 393 /** 394 * @SKB_DROP_REASON_IPVLAN_MULTICAST_BACKLOG: failed to enqueue the skb 395 * to ipvlan multicast queue. 396 */ 397 SKB_DROP_REASON_IPVLAN_MULTICAST_BACKLOG, 398 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 399 SKB_DROP_REASON_XDP, 400 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 401 SKB_DROP_REASON_TC_INGRESS, 402 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 403 SKB_DROP_REASON_UNHANDLED_PROTO, 404 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 405 SKB_DROP_REASON_SKB_CSUM, 406 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 407 SKB_DROP_REASON_SKB_GSO_SEG, 408 /** @SKB_DROP_REASON_SKB_BAD_GSO: malicious gso packet. */ 409 SKB_DROP_REASON_SKB_BAD_GSO, 410 /** 411 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 412 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 413 */ 414 SKB_DROP_REASON_SKB_UCOPY_FAULT, 415 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 416 SKB_DROP_REASON_DEV_HDR, 417 /** 418 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 419 * any of its data structure that is not up/ready/initialized, 420 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 421 * is not initialized 422 */ 423 SKB_DROP_REASON_DEV_READY, 424 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 425 SKB_DROP_REASON_FULL_RING, 426 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 427 SKB_DROP_REASON_NOMEM, 428 /** 429 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 430 * networking data, e.g., failed to pull the protocol header from 431 * frags via pskb_may_pull() 432 */ 433 SKB_DROP_REASON_HDR_TRUNC, 434 /** 435 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 436 * to tun/tap, e.g., via TUNSETFILTEREBPF 437 */ 438 SKB_DROP_REASON_TAP_FILTER, 439 /** 440 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 441 * tun/tap, e.g., check_filter() 442 */ 443 SKB_DROP_REASON_TAP_TXFILTER, 444 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 445 SKB_DROP_REASON_ICMP_CSUM, 446 /** 447 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 448 * such as a broadcasts ICMP_TIMESTAMP 449 */ 450 SKB_DROP_REASON_INVALID_PROTO, 451 /** 452 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 453 * IPSTATS_MIB_INADDRERRORS 454 */ 455 SKB_DROP_REASON_IP_INADDRERRORS, 456 /** 457 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 458 * IPSTATS_MIB_INADDRERRORS 459 */ 460 SKB_DROP_REASON_IP_INNOROUTES, 461 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 462 SKB_DROP_REASON_IP_LOCAL_SOURCE, 463 /** 464 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 465 * 1) source ip is multicast or limited broadcast 466 * 2) source ip is zero and not IGMP 467 */ 468 SKB_DROP_REASON_IP_INVALID_SOURCE, 469 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 470 SKB_DROP_REASON_IP_LOCALNET, 471 /** 472 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 473 * 1) dest ip is 0 474 */ 475 SKB_DROP_REASON_IP_INVALID_DEST, 476 /** 477 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 478 * MTU) 479 */ 480 SKB_DROP_REASON_PKT_TOO_BIG, 481 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 482 SKB_DROP_REASON_DUP_FRAG, 483 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 484 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 485 /** 486 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 487 * (/proc/sys/net/ipv4/ipfrag_max_dist) 488 */ 489 SKB_DROP_REASON_FRAG_TOO_FAR, 490 /** 491 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 492 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 493 */ 494 SKB_DROP_REASON_TCP_MINTTL, 495 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 496 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 497 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 498 SKB_DROP_REASON_IPV6_NDISC_FRAG, 499 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 500 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 501 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 502 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 503 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 504 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 505 /** 506 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 507 * for another host. 508 */ 509 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 510 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 511 SKB_DROP_REASON_QUEUE_PURGE, 512 /** 513 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 514 * processing a tc ext cookie. 515 */ 516 SKB_DROP_REASON_TC_COOKIE_ERROR, 517 /** 518 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 519 * after its filter matches an incoming packet. 520 */ 521 SKB_DROP_REASON_PACKET_SOCK_ERROR, 522 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 523 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 524 /** 525 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 526 * iterations. 527 */ 528 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 529 /** 530 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 531 * 1) reserved fields are not zero 532 * 2) "I" flag is not set 533 */ 534 SKB_DROP_REASON_VXLAN_INVALID_HDR, 535 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 536 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 537 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 538 SKB_DROP_REASON_MAC_INVALID_SOURCE, 539 /** 540 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 541 * entry or an entry pointing to a nexthop. 542 */ 543 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 544 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 545 SKB_DROP_REASON_NO_TX_TARGET, 546 /** 547 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 548 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 549 */ 550 SKB_DROP_REASON_IP_TUNNEL_ECN, 551 /** 552 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 553 * reached a device which is in "external" mode. 554 */ 555 SKB_DROP_REASON_TUNNEL_TXINFO, 556 /** 557 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 558 * the MAC address of the local netdev. 559 */ 560 SKB_DROP_REASON_LOCAL_MAC, 561 /** 562 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 563 * forwarded to the in_dev, and the proxy_arp_pvlan is not 564 * enabled. 565 */ 566 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 567 /** 568 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 569 * is an IEEE MAC Control address. 570 */ 571 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 572 /** 573 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 574 * ingress bridge port does not allow frames to be forwarded. 575 */ 576 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 577 /** 578 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 579 * non conform CAN frame (or device is unable to receive CAN frames) 580 */ 581 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 582 /** 583 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 584 * non conform CAN-FD frame (or device is unable to receive CAN frames) 585 */ 586 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 587 /** 588 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 589 * non conform CAN-XL frame (or device is unable to receive CAN frames) 590 */ 591 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 592 /** 593 * @SKB_DROP_REASON_PFMEMALLOC: packet allocated from memory reserve 594 * reached a path or socket not eligible for use of memory reserves 595 */ 596 SKB_DROP_REASON_PFMEMALLOC, 597 /** @SKB_DROP_REASON_PSP_INPUT: PSP input checks failed */ 598 SKB_DROP_REASON_PSP_INPUT, 599 /** @SKB_DROP_REASON_PSP_OUTPUT: PSP output checks failed */ 600 SKB_DROP_REASON_PSP_OUTPUT, 601 /** @SKB_DROP_REASON_RECURSION_LIMIT: Dead loop on virtual device. */ 602 SKB_DROP_REASON_RECURSION_LIMIT, 603 /** 604 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 605 * shouldn't be used as a real 'reason' - only for tracing code gen 606 */ 607 SKB_DROP_REASON_MAX, 608 609 /** 610 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 611 * see &enum skb_drop_reason_subsys 612 */ 613 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 614 }; 615 616 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 617 618 #define SKB_DR_INIT(name, reason) \ 619 enum skb_drop_reason name = SKB_DROP_REASON_##reason 620 #define SKB_DR(name) \ 621 SKB_DR_INIT(name, NOT_SPECIFIED) 622 #define SKB_DR_SET(name, reason) \ 623 (name = SKB_DROP_REASON_##reason) 624 #define SKB_DR_OR(name, reason) \ 625 do { \ 626 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 627 name == SKB_NOT_DROPPED_YET) \ 628 SKB_DR_SET(name, reason); \ 629 } while (0) 630 631 #endif 632