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