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(PKT_TOO_SMALL) \ 10 FN(TCP_CSUM) \ 11 FN(SOCKET_FILTER) \ 12 FN(UDP_CSUM) \ 13 FN(NETFILTER_DROP) \ 14 FN(OTHERHOST) \ 15 FN(IP_CSUM) \ 16 FN(IP_INHDR) \ 17 FN(IP_RPFILTER) \ 18 FN(UNICAST_IN_L2_MULTICAST) \ 19 FN(XFRM_POLICY) \ 20 FN(IP_NOPROTO) \ 21 FN(SOCKET_RCVBUFF) \ 22 FN(PROTO_MEM) \ 23 FN(TCP_AUTH_HDR) \ 24 FN(TCP_MD5NOTFOUND) \ 25 FN(TCP_MD5UNEXPECTED) \ 26 FN(TCP_MD5FAILURE) \ 27 FN(TCP_AONOTFOUND) \ 28 FN(TCP_AOUNEXPECTED) \ 29 FN(TCP_AOKEYNOTFOUND) \ 30 FN(TCP_AOFAILURE) \ 31 FN(SOCKET_BACKLOG) \ 32 FN(TCP_FLAGS) \ 33 FN(TCP_ABORT_ON_DATA) \ 34 FN(TCP_ZEROWINDOW) \ 35 FN(TCP_OLD_DATA) \ 36 FN(TCP_OVERWINDOW) \ 37 FN(TCP_OFOMERGE) \ 38 FN(TCP_RFC7323_PAWS) \ 39 FN(TCP_OLD_SEQUENCE) \ 40 FN(TCP_INVALID_SEQUENCE) \ 41 FN(TCP_INVALID_ACK_SEQUENCE) \ 42 FN(TCP_RESET) \ 43 FN(TCP_INVALID_SYN) \ 44 FN(TCP_CLOSE) \ 45 FN(TCP_FASTOPEN) \ 46 FN(TCP_OLD_ACK) \ 47 FN(TCP_TOO_OLD_ACK) \ 48 FN(TCP_ACK_UNSENT_DATA) \ 49 FN(TCP_OFO_QUEUE_PRUNE) \ 50 FN(TCP_OFO_DROP) \ 51 FN(IP_OUTNOROUTES) \ 52 FN(BPF_CGROUP_EGRESS) \ 53 FN(IPV6DISABLED) \ 54 FN(NEIGH_CREATEFAIL) \ 55 FN(NEIGH_FAILED) \ 56 FN(NEIGH_QUEUEFULL) \ 57 FN(NEIGH_DEAD) \ 58 FN(TC_EGRESS) \ 59 FN(SECURITY_HOOK) \ 60 FN(QDISC_DROP) \ 61 FN(CPU_BACKLOG) \ 62 FN(XDP) \ 63 FN(TC_INGRESS) \ 64 FN(UNHANDLED_PROTO) \ 65 FN(SKB_CSUM) \ 66 FN(SKB_GSO_SEG) \ 67 FN(SKB_UCOPY_FAULT) \ 68 FN(DEV_HDR) \ 69 FN(DEV_READY) \ 70 FN(FULL_RING) \ 71 FN(NOMEM) \ 72 FN(HDR_TRUNC) \ 73 FN(TAP_FILTER) \ 74 FN(TAP_TXFILTER) \ 75 FN(ICMP_CSUM) \ 76 FN(INVALID_PROTO) \ 77 FN(IP_INADDRERRORS) \ 78 FN(IP_INNOROUTES) \ 79 FN(IP_LOCAL_SOURCE) \ 80 FN(IP_INVALID_SOURCE) \ 81 FN(IP_LOCALNET) \ 82 FN(IP_INVALID_DEST) \ 83 FN(PKT_TOO_BIG) \ 84 FN(DUP_FRAG) \ 85 FN(FRAG_REASM_TIMEOUT) \ 86 FN(FRAG_TOO_FAR) \ 87 FN(TCP_MINTTL) \ 88 FN(IPV6_BAD_EXTHDR) \ 89 FN(IPV6_NDISC_FRAG) \ 90 FN(IPV6_NDISC_HOP_LIMIT) \ 91 FN(IPV6_NDISC_BAD_CODE) \ 92 FN(IPV6_NDISC_BAD_OPTIONS) \ 93 FN(IPV6_NDISC_NS_OTHERHOST) \ 94 FN(QUEUE_PURGE) \ 95 FN(TC_COOKIE_ERROR) \ 96 FN(PACKET_SOCK_ERROR) \ 97 FN(TC_CHAIN_NOTFOUND) \ 98 FN(TC_RECLASSIFY_LOOP) \ 99 FN(VXLAN_INVALID_HDR) \ 100 FN(VXLAN_VNI_NOT_FOUND) \ 101 FN(MAC_INVALID_SOURCE) \ 102 FN(VXLAN_ENTRY_EXISTS) \ 103 FN(VXLAN_NO_REMOTE) \ 104 FN(IP_TUNNEL_ECN) \ 105 FN(TUNNEL_TXINFO) \ 106 FN(LOCAL_MAC) \ 107 FN(ARP_PVLAN_DISABLE) \ 108 FNe(MAX) 109 110 /** 111 * enum skb_drop_reason - the reasons of skb drops 112 * 113 * The reason of skb drop, which is used in kfree_skb_reason(). 114 */ 115 enum skb_drop_reason { 116 /** 117 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 118 */ 119 SKB_NOT_DROPPED_YET = 0, 120 /** @SKB_CONSUMED: packet has been consumed */ 121 SKB_CONSUMED, 122 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 123 SKB_DROP_REASON_NOT_SPECIFIED, 124 /** 125 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 126 * Reason could be one of three cases: 127 * 1) no established/listening socket found during lookup process 128 * 2) no valid request socket during 3WHS process 129 * 3) no valid child socket during 3WHS process 130 */ 131 SKB_DROP_REASON_NO_SOCKET, 132 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 133 SKB_DROP_REASON_PKT_TOO_SMALL, 134 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 135 SKB_DROP_REASON_TCP_CSUM, 136 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 137 SKB_DROP_REASON_SOCKET_FILTER, 138 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 139 SKB_DROP_REASON_UDP_CSUM, 140 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 141 SKB_DROP_REASON_NETFILTER_DROP, 142 /** 143 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 144 * (interface is in promisc mode) 145 */ 146 SKB_DROP_REASON_OTHERHOST, 147 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 148 SKB_DROP_REASON_IP_CSUM, 149 /** 150 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 151 * IPSTATS_MIB_INHDRERRORS) 152 */ 153 SKB_DROP_REASON_IP_INHDR, 154 /** 155 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 156 * document for rp_filter in ip-sysctl.rst for more information 157 */ 158 SKB_DROP_REASON_IP_RPFILTER, 159 /** 160 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 161 * multicast, but L3 is unicast. 162 */ 163 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 164 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 165 SKB_DROP_REASON_XFRM_POLICY, 166 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 167 SKB_DROP_REASON_IP_NOPROTO, 168 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 169 SKB_DROP_REASON_SOCKET_RCVBUFF, 170 /** 171 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 172 * udp packet drop out of udp_memory_allocated. 173 */ 174 SKB_DROP_REASON_PROTO_MEM, 175 /** 176 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 177 * twice or set incorrectly. 178 */ 179 SKB_DROP_REASON_TCP_AUTH_HDR, 180 /** 181 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 182 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 183 */ 184 SKB_DROP_REASON_TCP_MD5NOTFOUND, 185 /** 186 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 187 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 188 */ 189 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 190 /** 191 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 192 * to LINUX_MIB_TCPMD5FAILURE 193 */ 194 SKB_DROP_REASON_TCP_MD5FAILURE, 195 /** 196 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 197 * corresponding to LINUX_MIB_TCPAOREQUIRED 198 */ 199 SKB_DROP_REASON_TCP_AONOTFOUND, 200 /** 201 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 202 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 203 */ 204 SKB_DROP_REASON_TCP_AOUNEXPECTED, 205 /** 206 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 207 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 208 */ 209 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 210 /** 211 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 212 * corresponding to LINUX_MIB_TCPAOBAD 213 */ 214 SKB_DROP_REASON_TCP_AOFAILURE, 215 /** 216 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 217 * see LINUX_MIB_TCPBACKLOGDROP) 218 */ 219 SKB_DROP_REASON_SOCKET_BACKLOG, 220 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 221 SKB_DROP_REASON_TCP_FLAGS, 222 /** 223 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 224 * LINUX_MIB_TCPABORTONDATA 225 */ 226 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 227 /** 228 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 229 * see LINUX_MIB_TCPZEROWINDOWDROP 230 */ 231 SKB_DROP_REASON_TCP_ZEROWINDOW, 232 /** 233 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 234 * received before (spurious retrans may happened), see 235 * LINUX_MIB_DELAYEDACKLOST 236 */ 237 SKB_DROP_REASON_TCP_OLD_DATA, 238 /** 239 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 240 * the seq of the first byte exceed the right edges of receive 241 * window 242 */ 243 SKB_DROP_REASON_TCP_OVERWINDOW, 244 /** 245 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 246 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 247 */ 248 SKB_DROP_REASON_TCP_OFOMERGE, 249 /** 250 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 251 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 252 */ 253 SKB_DROP_REASON_TCP_RFC7323_PAWS, 254 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 255 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 256 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */ 257 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 258 /** 259 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 260 * field because ack sequence is not in the window between snd_una 261 * and snd_nxt 262 */ 263 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 264 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 265 SKB_DROP_REASON_TCP_RESET, 266 /** 267 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 268 * SYN flag 269 */ 270 SKB_DROP_REASON_TCP_INVALID_SYN, 271 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 272 SKB_DROP_REASON_TCP_CLOSE, 273 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 274 SKB_DROP_REASON_TCP_FASTOPEN, 275 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 276 SKB_DROP_REASON_TCP_OLD_ACK, 277 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 278 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 279 /** 280 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 281 * sent yet 282 */ 283 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 284 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 285 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 286 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 287 SKB_DROP_REASON_TCP_OFO_DROP, 288 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 289 SKB_DROP_REASON_IP_OUTNOROUTES, 290 /** 291 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 292 * eBPF program 293 */ 294 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 295 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 296 SKB_DROP_REASON_IPV6DISABLED, 297 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 298 SKB_DROP_REASON_NEIGH_CREATEFAIL, 299 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 300 SKB_DROP_REASON_NEIGH_FAILED, 301 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 302 SKB_DROP_REASON_NEIGH_QUEUEFULL, 303 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 304 SKB_DROP_REASON_NEIGH_DEAD, 305 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 306 SKB_DROP_REASON_TC_EGRESS, 307 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 308 SKB_DROP_REASON_SECURITY_HOOK, 309 /** 310 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 311 * failed to enqueue to current qdisc) 312 */ 313 SKB_DROP_REASON_QDISC_DROP, 314 /** 315 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 316 * backlog queue. This can be caused by backlog queue full (see 317 * netdev_max_backlog in net.rst) or RPS flow limit 318 */ 319 SKB_DROP_REASON_CPU_BACKLOG, 320 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 321 SKB_DROP_REASON_XDP, 322 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 323 SKB_DROP_REASON_TC_INGRESS, 324 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 325 SKB_DROP_REASON_UNHANDLED_PROTO, 326 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 327 SKB_DROP_REASON_SKB_CSUM, 328 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 329 SKB_DROP_REASON_SKB_GSO_SEG, 330 /** 331 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 332 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 333 */ 334 SKB_DROP_REASON_SKB_UCOPY_FAULT, 335 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 336 SKB_DROP_REASON_DEV_HDR, 337 /** 338 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 339 * any of its data structure that is not up/ready/initialized, 340 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 341 * is not initialized 342 */ 343 SKB_DROP_REASON_DEV_READY, 344 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 345 SKB_DROP_REASON_FULL_RING, 346 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 347 SKB_DROP_REASON_NOMEM, 348 /** 349 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 350 * networking data, e.g., failed to pull the protocol header from 351 * frags via pskb_may_pull() 352 */ 353 SKB_DROP_REASON_HDR_TRUNC, 354 /** 355 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 356 * to tun/tap, e.g., via TUNSETFILTEREBPF 357 */ 358 SKB_DROP_REASON_TAP_FILTER, 359 /** 360 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 361 * tun/tap, e.g., check_filter() 362 */ 363 SKB_DROP_REASON_TAP_TXFILTER, 364 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 365 SKB_DROP_REASON_ICMP_CSUM, 366 /** 367 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 368 * such as a broadcasts ICMP_TIMESTAMP 369 */ 370 SKB_DROP_REASON_INVALID_PROTO, 371 /** 372 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 373 * IPSTATS_MIB_INADDRERRORS 374 */ 375 SKB_DROP_REASON_IP_INADDRERRORS, 376 /** 377 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 378 * IPSTATS_MIB_INADDRERRORS 379 */ 380 SKB_DROP_REASON_IP_INNOROUTES, 381 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 382 SKB_DROP_REASON_IP_LOCAL_SOURCE, 383 /** 384 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 385 * 1) source ip is multicast or limited broadcast 386 * 2) source ip is zero and not IGMP 387 */ 388 SKB_DROP_REASON_IP_INVALID_SOURCE, 389 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 390 SKB_DROP_REASON_IP_LOCALNET, 391 /** 392 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 393 * 1) dest ip is 0 394 */ 395 SKB_DROP_REASON_IP_INVALID_DEST, 396 /** 397 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 398 * MTU) 399 */ 400 SKB_DROP_REASON_PKT_TOO_BIG, 401 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 402 SKB_DROP_REASON_DUP_FRAG, 403 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 404 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 405 /** 406 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 407 * (/proc/sys/net/ipv4/ipfrag_max_dist) 408 */ 409 SKB_DROP_REASON_FRAG_TOO_FAR, 410 /** 411 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 412 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 413 */ 414 SKB_DROP_REASON_TCP_MINTTL, 415 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 416 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 417 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 418 SKB_DROP_REASON_IPV6_NDISC_FRAG, 419 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 420 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 421 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 422 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 423 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 424 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 425 /** 426 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 427 * for another host. 428 */ 429 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 430 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 431 SKB_DROP_REASON_QUEUE_PURGE, 432 /** 433 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 434 * processing a tc ext cookie. 435 */ 436 SKB_DROP_REASON_TC_COOKIE_ERROR, 437 /** 438 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 439 * after its filter matches an incoming packet. 440 */ 441 SKB_DROP_REASON_PACKET_SOCK_ERROR, 442 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 443 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 444 /** 445 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 446 * iterations. 447 */ 448 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 449 /** 450 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 451 * 1) reserved fields are not zero 452 * 2) "I" flag is not set 453 */ 454 SKB_DROP_REASON_VXLAN_INVALID_HDR, 455 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 456 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 457 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 458 SKB_DROP_REASON_MAC_INVALID_SOURCE, 459 /** 460 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 461 * entry or an entry pointing to a nexthop. 462 */ 463 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 464 /** @SKB_DROP_REASON_VXLAN_NO_REMOTE: no remote found for xmit */ 465 SKB_DROP_REASON_VXLAN_NO_REMOTE, 466 /** 467 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 468 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 469 */ 470 SKB_DROP_REASON_IP_TUNNEL_ECN, 471 /** 472 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 473 * reached a device which is in "external" mode. 474 */ 475 SKB_DROP_REASON_TUNNEL_TXINFO, 476 /** 477 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 478 * the MAC address of the local netdev. 479 */ 480 SKB_DROP_REASON_LOCAL_MAC, 481 /** 482 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 483 * forwarded to the in_dev, and the proxy_arp_pvlan is not 484 * enabled. 485 */ 486 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 487 /** 488 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 489 * shouldn't be used as a real 'reason' - only for tracing code gen 490 */ 491 SKB_DROP_REASON_MAX, 492 493 /** 494 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 495 * see &enum skb_drop_reason_subsys 496 */ 497 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 498 }; 499 500 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 501 502 #define SKB_DR_INIT(name, reason) \ 503 enum skb_drop_reason name = SKB_DROP_REASON_##reason 504 #define SKB_DR(name) \ 505 SKB_DR_INIT(name, NOT_SPECIFIED) 506 #define SKB_DR_SET(name, reason) \ 507 (name = SKB_DROP_REASON_##reason) 508 #define SKB_DR_OR(name, reason) \ 509 do { \ 510 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 511 name == SKB_NOT_DROPPED_YET) \ 512 SKB_DR_SET(name, reason); \ 513 } while (0) 514 515 #endif 516