tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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_TSECR) \
44 FN(TCP_LISTEN_OVERFLOW) \
45 FN(TCP_OLD_SEQUENCE) \
46 FN(TCP_INVALID_SEQUENCE) \
47 FN(TCP_INVALID_ACK_SEQUENCE) \
48 FN(TCP_RESET) \
49 FN(TCP_INVALID_SYN) \
50 FN(TCP_CLOSE) \
51 FN(TCP_FASTOPEN) \
52 FN(TCP_OLD_ACK) \
53 FN(TCP_TOO_OLD_ACK) \
54 FN(TCP_ACK_UNSENT_DATA) \
55 FN(TCP_OFO_QUEUE_PRUNE) \
56 FN(TCP_OFO_DROP) \
57 FN(IP_OUTNOROUTES) \
58 FN(BPF_CGROUP_EGRESS) \
59 FN(IPV6DISABLED) \
60 FN(NEIGH_CREATEFAIL) \
61 FN(NEIGH_FAILED) \
62 FN(NEIGH_QUEUEFULL) \
63 FN(NEIGH_DEAD) \
64 FN(TC_EGRESS) \
65 FN(SECURITY_HOOK) \
66 FN(QDISC_DROP) \
67 FN(QDISC_OVERLIMIT) \
68 FN(QDISC_CONGESTED) \
69 FN(CAKE_FLOOD) \
70 FN(FQ_BAND_LIMIT) \
71 FN(FQ_HORIZON_LIMIT) \
72 FN(FQ_FLOW_LIMIT) \
73 FN(CPU_BACKLOG) \
74 FN(XDP) \
75 FN(TC_INGRESS) \
76 FN(UNHANDLED_PROTO) \
77 FN(SKB_CSUM) \
78 FN(SKB_GSO_SEG) \
79 FN(SKB_UCOPY_FAULT) \
80 FN(DEV_HDR) \
81 FN(DEV_READY) \
82 FN(FULL_RING) \
83 FN(NOMEM) \
84 FN(HDR_TRUNC) \
85 FN(TAP_FILTER) \
86 FN(TAP_TXFILTER) \
87 FN(ICMP_CSUM) \
88 FN(INVALID_PROTO) \
89 FN(IP_INADDRERRORS) \
90 FN(IP_INNOROUTES) \
91 FN(IP_LOCAL_SOURCE) \
92 FN(IP_INVALID_SOURCE) \
93 FN(IP_LOCALNET) \
94 FN(IP_INVALID_DEST) \
95 FN(PKT_TOO_BIG) \
96 FN(DUP_FRAG) \
97 FN(FRAG_REASM_TIMEOUT) \
98 FN(FRAG_TOO_FAR) \
99 FN(TCP_MINTTL) \
100 FN(IPV6_BAD_EXTHDR) \
101 FN(IPV6_NDISC_FRAG) \
102 FN(IPV6_NDISC_HOP_LIMIT) \
103 FN(IPV6_NDISC_BAD_CODE) \
104 FN(IPV6_NDISC_BAD_OPTIONS) \
105 FN(IPV6_NDISC_NS_OTHERHOST) \
106 FN(QUEUE_PURGE) \
107 FN(TC_COOKIE_ERROR) \
108 FN(PACKET_SOCK_ERROR) \
109 FN(TC_CHAIN_NOTFOUND) \
110 FN(TC_RECLASSIFY_LOOP) \
111 FN(VXLAN_INVALID_HDR) \
112 FN(VXLAN_VNI_NOT_FOUND) \
113 FN(MAC_INVALID_SOURCE) \
114 FN(VXLAN_ENTRY_EXISTS) \
115 FN(NO_TX_TARGET) \
116 FN(IP_TUNNEL_ECN) \
117 FN(TUNNEL_TXINFO) \
118 FN(LOCAL_MAC) \
119 FN(ARP_PVLAN_DISABLE) \
120 FN(MAC_IEEE_MAC_CONTROL) \
121 FN(BRIDGE_INGRESS_STP_STATE) \
122 FNe(MAX)
123
124/**
125 * enum skb_drop_reason - the reasons of skb drops
126 *
127 * The reason of skb drop, which is used in kfree_skb_reason().
128 */
129enum skb_drop_reason {
130 /**
131 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case)
132 */
133 SKB_NOT_DROPPED_YET = 0,
134 /** @SKB_CONSUMED: packet has been consumed */
135 SKB_CONSUMED,
136 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */
137 SKB_DROP_REASON_NOT_SPECIFIED,
138 /**
139 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used.
140 * Reason could be one of three cases:
141 * 1) no established/listening socket found during lookup process
142 * 2) no valid request socket during 3WHS process
143 * 3) no valid child socket during 3WHS process
144 */
145 SKB_DROP_REASON_NO_SOCKET,
146 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */
147 SKB_DROP_REASON_SOCKET_CLOSE,
148 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */
149 SKB_DROP_REASON_SOCKET_FILTER,
150 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */
151 SKB_DROP_REASON_SOCKET_RCVBUFF,
152 /**
153 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM
154 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices
155 * during send() that the peer has been close()d.
156 */
157 SKB_DROP_REASON_UNIX_DISCONNECT,
158 /**
159 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by
160 * recv() without MSG_OOB so dropped.
161 */
162 SKB_DROP_REASON_UNIX_SKIP_OOB,
163 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */
164 SKB_DROP_REASON_PKT_TOO_SMALL,
165 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */
166 SKB_DROP_REASON_TCP_CSUM,
167 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */
168 SKB_DROP_REASON_UDP_CSUM,
169 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */
170 SKB_DROP_REASON_NETFILTER_DROP,
171 /**
172 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host
173 * (interface is in promisc mode)
174 */
175 SKB_DROP_REASON_OTHERHOST,
176 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */
177 SKB_DROP_REASON_IP_CSUM,
178 /**
179 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see
180 * IPSTATS_MIB_INHDRERRORS)
181 */
182 SKB_DROP_REASON_IP_INHDR,
183 /**
184 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the
185 * document for rp_filter in ip-sysctl.rst for more information
186 */
187 SKB_DROP_REASON_IP_RPFILTER,
188 /**
189 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is
190 * multicast, but L3 is unicast.
191 */
192 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST,
193 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */
194 SKB_DROP_REASON_XFRM_POLICY,
195 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */
196 SKB_DROP_REASON_IP_NOPROTO,
197 /**
198 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as
199 * udp packet drop out of udp_memory_allocated.
200 */
201 SKB_DROP_REASON_PROTO_MEM,
202 /**
203 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met
204 * twice or set incorrectly.
205 */
206 SKB_DROP_REASON_TCP_AUTH_HDR,
207 /**
208 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected,
209 * corresponding to LINUX_MIB_TCPMD5NOTFOUND
210 */
211 SKB_DROP_REASON_TCP_MD5NOTFOUND,
212 /**
213 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting
214 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED
215 */
216 SKB_DROP_REASON_TCP_MD5UNEXPECTED,
217 /**
218 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding
219 * to LINUX_MIB_TCPMD5FAILURE
220 */
221 SKB_DROP_REASON_TCP_MD5FAILURE,
222 /**
223 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected,
224 * corresponding to LINUX_MIB_TCPAOREQUIRED
225 */
226 SKB_DROP_REASON_TCP_AONOTFOUND,
227 /**
228 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it
229 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND
230 */
231 SKB_DROP_REASON_TCP_AOUNEXPECTED,
232 /**
233 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown,
234 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND
235 */
236 SKB_DROP_REASON_TCP_AOKEYNOTFOUND,
237 /**
238 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong,
239 * corresponding to LINUX_MIB_TCPAOBAD
240 */
241 SKB_DROP_REASON_TCP_AOFAILURE,
242 /**
243 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog (
244 * see LINUX_MIB_TCPBACKLOGDROP)
245 */
246 SKB_DROP_REASON_SOCKET_BACKLOG,
247 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */
248 SKB_DROP_REASON_TCP_FLAGS,
249 /**
250 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to
251 * LINUX_MIB_TCPABORTONDATA
252 */
253 SKB_DROP_REASON_TCP_ABORT_ON_DATA,
254 /**
255 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero,
256 * see LINUX_MIB_TCPZEROWINDOWDROP
257 */
258 SKB_DROP_REASON_TCP_ZEROWINDOW,
259 /**
260 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already
261 * received before (spurious retrans may happened), see
262 * LINUX_MIB_DELAYEDACKLOST
263 */
264 SKB_DROP_REASON_TCP_OLD_DATA,
265 /**
266 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window,
267 * the seq of the first byte exceed the right edges of receive
268 * window
269 */
270 SKB_DROP_REASON_TCP_OVERWINDOW,
271 /**
272 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo
273 * queue, corresponding to LINUX_MIB_TCPOFOMERGE
274 */
275 SKB_DROP_REASON_TCP_OFOMERGE,
276 /**
277 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to
278 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED
279 */
280 SKB_DROP_REASON_TCP_RFC7323_PAWS,
281 /**
282 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet.
283 * Corresponds to LINUX_MIB_PAWS_OLD_ACK.
284 */
285 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK,
286 /**
287 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr.
288 * Corresponds to LINUX_MIB_TSECRREJECTED.
289 */
290 SKB_DROP_REASON_TCP_RFC7323_TSECR,
291 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */
292 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW,
293 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */
294 SKB_DROP_REASON_TCP_OLD_SEQUENCE,
295 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */
296 SKB_DROP_REASON_TCP_INVALID_SEQUENCE,
297 /**
298 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ
299 * field because ack sequence is not in the window between snd_una
300 * and snd_nxt
301 */
302 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE,
303 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */
304 SKB_DROP_REASON_TCP_RESET,
305 /**
306 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected
307 * SYN flag
308 */
309 SKB_DROP_REASON_TCP_INVALID_SYN,
310 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */
311 SKB_DROP_REASON_TCP_CLOSE,
312 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */
313 SKB_DROP_REASON_TCP_FASTOPEN,
314 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */
315 SKB_DROP_REASON_TCP_OLD_ACK,
316 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */
317 SKB_DROP_REASON_TCP_TOO_OLD_ACK,
318 /**
319 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't
320 * sent yet
321 */
322 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA,
323 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */
324 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE,
325 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */
326 SKB_DROP_REASON_TCP_OFO_DROP,
327 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */
328 SKB_DROP_REASON_IP_OUTNOROUTES,
329 /**
330 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB
331 * eBPF program
332 */
333 SKB_DROP_REASON_BPF_CGROUP_EGRESS,
334 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */
335 SKB_DROP_REASON_IPV6DISABLED,
336 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */
337 SKB_DROP_REASON_NEIGH_CREATEFAIL,
338 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */
339 SKB_DROP_REASON_NEIGH_FAILED,
340 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */
341 SKB_DROP_REASON_NEIGH_QUEUEFULL,
342 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */
343 SKB_DROP_REASON_NEIGH_DEAD,
344 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */
345 SKB_DROP_REASON_TC_EGRESS,
346 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */
347 SKB_DROP_REASON_SECURITY_HOOK,
348 /**
349 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting (
350 * failed to enqueue to current qdisc)
351 */
352 SKB_DROP_REASON_QDISC_DROP,
353 /**
354 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc
355 * instance exceeds its total buffer size limit.
356 */
357 SKB_DROP_REASON_QDISC_OVERLIMIT,
358 /**
359 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm
360 * due to congestion.
361 */
362 SKB_DROP_REASON_QDISC_CONGESTED,
363 /**
364 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of
365 * CAKE qdisc AQM algorithm (BLUE).
366 */
367 SKB_DROP_REASON_CAKE_FLOOD,
368 /**
369 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band
370 * limit is reached.
371 */
372 SKB_DROP_REASON_FQ_BAND_LIMIT,
373 /**
374 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet
375 * timestamp is too far in the future.
376 */
377 SKB_DROP_REASON_FQ_HORIZON_LIMIT,
378 /**
379 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow
380 * exceeds its limits.
381 */
382 SKB_DROP_REASON_FQ_FLOW_LIMIT,
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 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */
390 SKB_DROP_REASON_XDP,
391 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */
392 SKB_DROP_REASON_TC_INGRESS,
393 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */
394 SKB_DROP_REASON_UNHANDLED_PROTO,
395 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */
396 SKB_DROP_REASON_SKB_CSUM,
397 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */
398 SKB_DROP_REASON_SKB_GSO_SEG,
399 /**
400 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space,
401 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx()
402 */
403 SKB_DROP_REASON_SKB_UCOPY_FAULT,
404 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */
405 SKB_DROP_REASON_DEV_HDR,
406 /**
407 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to
408 * any of its data structure that is not up/ready/initialized,
409 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq]
410 * is not initialized
411 */
412 SKB_DROP_REASON_DEV_READY,
413 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */
414 SKB_DROP_REASON_FULL_RING,
415 /** @SKB_DROP_REASON_NOMEM: error due to OOM */
416 SKB_DROP_REASON_NOMEM,
417 /**
418 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from
419 * networking data, e.g., failed to pull the protocol header from
420 * frags via pskb_may_pull()
421 */
422 SKB_DROP_REASON_HDR_TRUNC,
423 /**
424 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached
425 * to tun/tap, e.g., via TUNSETFILTEREBPF
426 */
427 SKB_DROP_REASON_TAP_FILTER,
428 /**
429 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at
430 * tun/tap, e.g., check_filter()
431 */
432 SKB_DROP_REASON_TAP_TXFILTER,
433 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */
434 SKB_DROP_REASON_ICMP_CSUM,
435 /**
436 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211,
437 * such as a broadcasts ICMP_TIMESTAMP
438 */
439 SKB_DROP_REASON_INVALID_PROTO,
440 /**
441 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to
442 * IPSTATS_MIB_INADDRERRORS
443 */
444 SKB_DROP_REASON_IP_INADDRERRORS,
445 /**
446 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to
447 * IPSTATS_MIB_INADDRERRORS
448 */
449 SKB_DROP_REASON_IP_INNOROUTES,
450 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */
451 SKB_DROP_REASON_IP_LOCAL_SOURCE,
452 /**
453 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid:
454 * 1) source ip is multicast or limited broadcast
455 * 2) source ip is zero and not IGMP
456 */
457 SKB_DROP_REASON_IP_INVALID_SOURCE,
458 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */
459 SKB_DROP_REASON_IP_LOCALNET,
460 /**
461 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid:
462 * 1) dest ip is 0
463 */
464 SKB_DROP_REASON_IP_INVALID_DEST,
465 /**
466 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the
467 * MTU)
468 */
469 SKB_DROP_REASON_PKT_TOO_BIG,
470 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */
471 SKB_DROP_REASON_DUP_FRAG,
472 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */
473 SKB_DROP_REASON_FRAG_REASM_TIMEOUT,
474 /**
475 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far.
476 * (/proc/sys/net/ipv4/ipfrag_max_dist)
477 */
478 SKB_DROP_REASON_FRAG_TOO_FAR,
479 /**
480 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below
481 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT).
482 */
483 SKB_DROP_REASON_TCP_MINTTL,
484 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */
485 SKB_DROP_REASON_IPV6_BAD_EXTHDR,
486 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */
487 SKB_DROP_REASON_IPV6_NDISC_FRAG,
488 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */
489 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT,
490 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */
491 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE,
492 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */
493 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS,
494 /**
495 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION
496 * for another host.
497 */
498 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST,
499 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */
500 SKB_DROP_REASON_QUEUE_PURGE,
501 /**
502 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst
503 * processing a tc ext cookie.
504 */
505 SKB_DROP_REASON_TC_COOKIE_ERROR,
506 /**
507 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors
508 * after its filter matches an incoming packet.
509 */
510 SKB_DROP_REASON_PACKET_SOCK_ERROR,
511 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */
512 SKB_DROP_REASON_TC_CHAIN_NOTFOUND,
513 /**
514 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop
515 * iterations.
516 */
517 SKB_DROP_REASON_TC_RECLASSIFY_LOOP,
518 /**
519 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.:
520 * 1) reserved fields are not zero
521 * 2) "I" flag is not set
522 */
523 SKB_DROP_REASON_VXLAN_INVALID_HDR,
524 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */
525 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND,
526 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */
527 SKB_DROP_REASON_MAC_INVALID_SOURCE,
528 /**
529 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static
530 * entry or an entry pointing to a nexthop.
531 */
532 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS,
533 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */
534 SKB_DROP_REASON_NO_TX_TARGET,
535 /**
536 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to
537 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail.
538 */
539 SKB_DROP_REASON_IP_TUNNEL_ECN,
540 /**
541 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata
542 * reached a device which is in "external" mode.
543 */
544 SKB_DROP_REASON_TUNNEL_TXINFO,
545 /**
546 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to
547 * the MAC address of the local netdev.
548 */
549 SKB_DROP_REASON_LOCAL_MAC,
550 /**
551 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is
552 * forwarded to the in_dev, and the proxy_arp_pvlan is not
553 * enabled.
554 */
555 SKB_DROP_REASON_ARP_PVLAN_DISABLE,
556 /**
557 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address
558 * is an IEEE MAC Control address.
559 */
560 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL,
561 /**
562 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the
563 * ingress bridge port does not allow frames to be forwarded.
564 */
565 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE,
566 /**
567 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which
568 * shouldn't be used as a real 'reason' - only for tracing code gen
569 */
570 SKB_DROP_REASON_MAX,
571
572 /**
573 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons,
574 * see &enum skb_drop_reason_subsys
575 */
576 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000,
577};
578
579#define SKB_DROP_REASON_SUBSYS_SHIFT 16
580
581#define SKB_DR_INIT(name, reason) \
582 enum skb_drop_reason name = SKB_DROP_REASON_##reason
583#define SKB_DR(name) \
584 SKB_DR_INIT(name, NOT_SPECIFIED)
585#define SKB_DR_SET(name, reason) \
586 (name = SKB_DROP_REASON_##reason)
587#define SKB_DR_OR(name, reason) \
588 do { \
589 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \
590 name == SKB_NOT_DROPPED_YET) \
591 SKB_DR_SET(name, reason); \
592 } while (0)
593
594#endif