Commit | Line | Data |
---|---|---|
ff8372a4 MD |
1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | ||
5b8285cc JB |
3 | #ifndef _LINUX_DROPREASON_CORE_H |
4 | #define _LINUX_DROPREASON_CORE_H | |
ff8372a4 | 5 | |
9cb252c4 MD |
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_MD5NOTFOUND) \ | |
24 | FN(TCP_MD5UNEXPECTED) \ | |
25 | FN(TCP_MD5FAILURE) \ | |
26 | FN(SOCKET_BACKLOG) \ | |
27 | FN(TCP_FLAGS) \ | |
28 | FN(TCP_ZEROWINDOW) \ | |
29 | FN(TCP_OLD_DATA) \ | |
30 | FN(TCP_OVERWINDOW) \ | |
31 | FN(TCP_OFOMERGE) \ | |
32 | FN(TCP_RFC7323_PAWS) \ | |
33 | FN(TCP_INVALID_SEQUENCE) \ | |
34 | FN(TCP_RESET) \ | |
35 | FN(TCP_INVALID_SYN) \ | |
36 | FN(TCP_CLOSE) \ | |
37 | FN(TCP_FASTOPEN) \ | |
38 | FN(TCP_OLD_ACK) \ | |
39 | FN(TCP_TOO_OLD_ACK) \ | |
40 | FN(TCP_ACK_UNSENT_DATA) \ | |
41 | FN(TCP_OFO_QUEUE_PRUNE) \ | |
42 | FN(TCP_OFO_DROP) \ | |
43 | FN(IP_OUTNOROUTES) \ | |
44 | FN(BPF_CGROUP_EGRESS) \ | |
45 | FN(IPV6DISABLED) \ | |
46 | FN(NEIGH_CREATEFAIL) \ | |
47 | FN(NEIGH_FAILED) \ | |
48 | FN(NEIGH_QUEUEFULL) \ | |
49 | FN(NEIGH_DEAD) \ | |
50 | FN(TC_EGRESS) \ | |
51 | FN(QDISC_DROP) \ | |
52 | FN(CPU_BACKLOG) \ | |
53 | FN(XDP) \ | |
54 | FN(TC_INGRESS) \ | |
55 | FN(UNHANDLED_PROTO) \ | |
56 | FN(SKB_CSUM) \ | |
57 | FN(SKB_GSO_SEG) \ | |
58 | FN(SKB_UCOPY_FAULT) \ | |
59 | FN(DEV_HDR) \ | |
60 | FN(DEV_READY) \ | |
61 | FN(FULL_RING) \ | |
62 | FN(NOMEM) \ | |
63 | FN(HDR_TRUNC) \ | |
64 | FN(TAP_FILTER) \ | |
65 | FN(TAP_TXFILTER) \ | |
66 | FN(ICMP_CSUM) \ | |
67 | FN(INVALID_PROTO) \ | |
68 | FN(IP_INADDRERRORS) \ | |
69 | FN(IP_INNOROUTES) \ | |
70 | FN(PKT_TOO_BIG) \ | |
4ecbb1c2 | 71 | FN(DUP_FRAG) \ |
77adfd3a | 72 | FN(FRAG_REASM_TIMEOUT) \ |
3bdfb04f | 73 | FN(FRAG_TOO_FAR) \ |
2798e36d | 74 | FN(TCP_MINTTL) \ |
dc68eaf2 | 75 | FN(IPV6_BAD_EXTHDR) \ |
545dbcd1 ED |
76 | FN(IPV6_NDISC_FRAG) \ |
77 | FN(IPV6_NDISC_HOP_LIMIT) \ | |
78 | FN(IPV6_NDISC_BAD_CODE) \ | |
784d4477 | 79 | FN(IPV6_NDISC_BAD_OPTIONS) \ |
c34b8bb1 | 80 | FN(IPV6_NDISC_NS_OTHERHOST) \ |
9cb252c4 MD |
81 | FNe(MAX) |
82 | ||
b160f727 MD |
83 | /** |
84 | * enum skb_drop_reason - the reasons of skb drops | |
ff8372a4 | 85 | * |
b160f727 | 86 | * The reason of skb drop, which is used in kfree_skb_reason(). |
ff8372a4 MD |
87 | */ |
88 | enum skb_drop_reason { | |
b160f727 MD |
89 | /** |
90 | * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) | |
91 | */ | |
ff8372a4 | 92 | SKB_NOT_DROPPED_YET = 0, |
0e84afe8 ED |
93 | /** @SKB_CONSUMED: packet has been consumed */ |
94 | SKB_CONSUMED, | |
b160f727 MD |
95 | /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ |
96 | SKB_DROP_REASON_NOT_SPECIFIED, | |
97 | /** @SKB_DROP_REASON_NO_SOCKET: socket not found */ | |
98 | SKB_DROP_REASON_NO_SOCKET, | |
99 | /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ | |
100 | SKB_DROP_REASON_PKT_TOO_SMALL, | |
101 | /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ | |
102 | SKB_DROP_REASON_TCP_CSUM, | |
103 | /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ | |
104 | SKB_DROP_REASON_SOCKET_FILTER, | |
105 | /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ | |
106 | SKB_DROP_REASON_UDP_CSUM, | |
107 | /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ | |
108 | SKB_DROP_REASON_NETFILTER_DROP, | |
109 | /** | |
110 | * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host | |
111 | * (interface is in promisc mode) | |
112 | */ | |
113 | SKB_DROP_REASON_OTHERHOST, | |
114 | /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ | |
115 | SKB_DROP_REASON_IP_CSUM, | |
116 | /** | |
117 | * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see | |
118 | * IPSTATS_MIB_INHDRERRORS) | |
119 | */ | |
120 | SKB_DROP_REASON_IP_INHDR, | |
121 | /** | |
122 | * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the | |
123 | * document for rp_filter in ip-sysctl.rst for more information | |
124 | */ | |
125 | SKB_DROP_REASON_IP_RPFILTER, | |
126 | /** | |
127 | * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is | |
128 | * multicast, but L3 is unicast. | |
129 | */ | |
130 | SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, | |
131 | /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ | |
132 | SKB_DROP_REASON_XFRM_POLICY, | |
133 | /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ | |
134 | SKB_DROP_REASON_IP_NOPROTO, | |
135 | /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ | |
136 | SKB_DROP_REASON_SOCKET_RCVBUFF, | |
137 | /** | |
138 | * @SKB_DROP_REASON_PROTO_MEM: proto memory limition, such as udp packet | |
139 | * drop out of udp_memory_allocated. | |
140 | */ | |
141 | SKB_DROP_REASON_PROTO_MEM, | |
142 | /** | |
143 | * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, | |
144 | * corresponding to LINUX_MIB_TCPMD5NOTFOUND | |
145 | */ | |
146 | SKB_DROP_REASON_TCP_MD5NOTFOUND, | |
147 | /** | |
148 | * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting | |
149 | * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED | |
150 | */ | |
151 | SKB_DROP_REASON_TCP_MD5UNEXPECTED, | |
152 | /** | |
153 | * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding | |
154 | * to LINUX_MIB_TCPMD5FAILURE | |
155 | */ | |
156 | SKB_DROP_REASON_TCP_MD5FAILURE, | |
157 | /** | |
158 | * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( | |
159 | * see LINUX_MIB_TCPBACKLOGDROP) | |
160 | */ | |
161 | SKB_DROP_REASON_SOCKET_BACKLOG, | |
162 | /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ | |
163 | SKB_DROP_REASON_TCP_FLAGS, | |
164 | /** | |
165 | * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, | |
166 | * see LINUX_MIB_TCPZEROWINDOWDROP | |
167 | */ | |
168 | SKB_DROP_REASON_TCP_ZEROWINDOW, | |
169 | /** | |
170 | * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data reveived is already | |
171 | * received before (spurious retrans may happened), see | |
172 | * LINUX_MIB_DELAYEDACKLOST | |
173 | */ | |
174 | SKB_DROP_REASON_TCP_OLD_DATA, | |
175 | /** | |
176 | * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, | |
177 | * the seq of the first byte exceed the right edges of receive | |
178 | * window | |
179 | */ | |
180 | SKB_DROP_REASON_TCP_OVERWINDOW, | |
181 | /** | |
182 | * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo | |
183 | * queue, corresponding to LINUX_MIB_TCPOFOMERGE | |
184 | */ | |
185 | SKB_DROP_REASON_TCP_OFOMERGE, | |
186 | /** | |
187 | * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to | |
188 | * LINUX_MIB_PAWSESTABREJECTED | |
189 | */ | |
190 | SKB_DROP_REASON_TCP_RFC7323_PAWS, | |
191 | /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */ | |
192 | SKB_DROP_REASON_TCP_INVALID_SEQUENCE, | |
193 | /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ | |
194 | SKB_DROP_REASON_TCP_RESET, | |
195 | /** | |
196 | * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected | |
197 | * SYN flag | |
198 | */ | |
199 | SKB_DROP_REASON_TCP_INVALID_SYN, | |
200 | /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ | |
201 | SKB_DROP_REASON_TCP_CLOSE, | |
202 | /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ | |
203 | SKB_DROP_REASON_TCP_FASTOPEN, | |
204 | /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ | |
205 | SKB_DROP_REASON_TCP_OLD_ACK, | |
206 | /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ | |
207 | SKB_DROP_REASON_TCP_TOO_OLD_ACK, | |
208 | /** | |
209 | * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't | |
210 | * sent yet | |
211 | */ | |
212 | SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, | |
213 | /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ | |
214 | SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, | |
215 | /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ | |
216 | SKB_DROP_REASON_TCP_OFO_DROP, | |
217 | /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ | |
218 | SKB_DROP_REASON_IP_OUTNOROUTES, | |
219 | /** | |
220 | * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB | |
221 | * eBPF program | |
222 | */ | |
223 | SKB_DROP_REASON_BPF_CGROUP_EGRESS, | |
224 | /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ | |
225 | SKB_DROP_REASON_IPV6DISABLED, | |
226 | /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ | |
227 | SKB_DROP_REASON_NEIGH_CREATEFAIL, | |
228 | /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ | |
229 | SKB_DROP_REASON_NEIGH_FAILED, | |
230 | /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ | |
231 | SKB_DROP_REASON_NEIGH_QUEUEFULL, | |
232 | /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ | |
233 | SKB_DROP_REASON_NEIGH_DEAD, | |
234 | /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ | |
235 | SKB_DROP_REASON_TC_EGRESS, | |
236 | /** | |
237 | * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( | |
238 | * failed to enqueue to current qdisc) | |
239 | */ | |
240 | SKB_DROP_REASON_QDISC_DROP, | |
241 | /** | |
242 | * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU | |
243 | * backlog queue. This can be caused by backlog queue full (see | |
244 | * netdev_max_backlog in net.rst) or RPS flow limit | |
245 | */ | |
246 | SKB_DROP_REASON_CPU_BACKLOG, | |
247 | /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ | |
248 | SKB_DROP_REASON_XDP, | |
249 | /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ | |
250 | SKB_DROP_REASON_TC_INGRESS, | |
251 | /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ | |
252 | SKB_DROP_REASON_UNHANDLED_PROTO, | |
253 | /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ | |
254 | SKB_DROP_REASON_SKB_CSUM, | |
255 | /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ | |
256 | SKB_DROP_REASON_SKB_GSO_SEG, | |
257 | /** | |
258 | * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, | |
259 | * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() | |
260 | */ | |
261 | SKB_DROP_REASON_SKB_UCOPY_FAULT, | |
262 | /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ | |
263 | SKB_DROP_REASON_DEV_HDR, | |
264 | /** | |
265 | * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to | |
266 | * any of its data structure that is not up/ready/initialized, | |
267 | * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] | |
268 | * is not initialized | |
ff8372a4 MD |
269 | */ |
270 | SKB_DROP_REASON_DEV_READY, | |
b160f727 MD |
271 | /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ |
272 | SKB_DROP_REASON_FULL_RING, | |
273 | /** @SKB_DROP_REASON_NOMEM: error due to OOM */ | |
274 | SKB_DROP_REASON_NOMEM, | |
275 | /** | |
276 | * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from | |
277 | * networking data, e.g., failed to pull the protocol header from | |
278 | * frags via pskb_may_pull() | |
279 | */ | |
280 | SKB_DROP_REASON_HDR_TRUNC, | |
281 | /** | |
282 | * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached | |
283 | * to tun/tap, e.g., via TUNSETFILTEREBPF | |
284 | */ | |
285 | SKB_DROP_REASON_TAP_FILTER, | |
286 | /** | |
287 | * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at | |
288 | * tun/tap, e.g., check_filter() | |
289 | */ | |
290 | SKB_DROP_REASON_TAP_TXFILTER, | |
291 | /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ | |
292 | SKB_DROP_REASON_ICMP_CSUM, | |
293 | /** | |
294 | * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, | |
295 | * such as a broadcasts ICMP_TIMESTAMP | |
296 | */ | |
297 | SKB_DROP_REASON_INVALID_PROTO, | |
298 | /** | |
299 | * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to | |
300 | * IPSTATS_MIB_INADDRERRORS | |
301 | */ | |
302 | SKB_DROP_REASON_IP_INADDRERRORS, | |
303 | /** | |
304 | * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to | |
305 | * IPSTATS_MIB_INADDRERRORS | |
306 | */ | |
307 | SKB_DROP_REASON_IP_INNOROUTES, | |
308 | /** | |
309 | * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the | |
310 | * MTU) | |
311 | */ | |
312 | SKB_DROP_REASON_PKT_TOO_BIG, | |
4ecbb1c2 ED |
313 | /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ |
314 | SKB_DROP_REASON_DUP_FRAG, | |
77adfd3a ED |
315 | /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ |
316 | SKB_DROP_REASON_FRAG_REASM_TIMEOUT, | |
3bdfb04f ED |
317 | /** |
318 | * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. | |
319 | * (/proc/sys/net/ipv4/ipfrag_max_dist) | |
320 | */ | |
321 | SKB_DROP_REASON_FRAG_TOO_FAR, | |
2798e36d ED |
322 | /** |
323 | * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below | |
324 | * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). | |
325 | */ | |
326 | SKB_DROP_REASON_TCP_MINTTL, | |
dc68eaf2 ED |
327 | /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ |
328 | SKB_DROP_REASON_IPV6_BAD_EXTHDR, | |
545dbcd1 ED |
329 | /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ |
330 | SKB_DROP_REASON_IPV6_NDISC_FRAG, | |
331 | /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ | |
332 | SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, | |
333 | /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ | |
334 | SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, | |
784d4477 ED |
335 | /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ |
336 | SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, | |
5b8285cc JB |
337 | /** |
338 | * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION | |
c34b8bb1 ED |
339 | * for another host. |
340 | */ | |
341 | SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, | |
b160f727 | 342 | /** |
071c0fc6 JB |
343 | * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which |
344 | * shouldn't be used as a real 'reason' - only for tracing code gen | |
b160f727 | 345 | */ |
ff8372a4 | 346 | SKB_DROP_REASON_MAX, |
071c0fc6 JB |
347 | |
348 | /** | |
349 | * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, | |
350 | * see &enum skb_drop_reason_subsys | |
351 | */ | |
352 | SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, | |
ff8372a4 MD |
353 | }; |
354 | ||
071c0fc6 JB |
355 | #define SKB_DROP_REASON_SUBSYS_SHIFT 16 |
356 | ||
ff8372a4 MD |
357 | #define SKB_DR_INIT(name, reason) \ |
358 | enum skb_drop_reason name = SKB_DROP_REASON_##reason | |
359 | #define SKB_DR(name) \ | |
360 | SKB_DR_INIT(name, NOT_SPECIFIED) | |
361 | #define SKB_DR_SET(name, reason) \ | |
362 | (name = SKB_DROP_REASON_##reason) | |
363 | #define SKB_DR_OR(name, reason) \ | |
364 | do { \ | |
365 | if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ | |
366 | name == SKB_NOT_DROPPED_YET) \ | |
367 | SKB_DR_SET(name, reason); \ | |
368 | } while (0) | |
369 | ||
370 | #endif |