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