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daedfb22 AS |
1 | /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
2 | * | |
3 | * This program is free software; you can redistribute it and/or | |
4 | * modify it under the terms of version 2 of the GNU General Public | |
5 | * License as published by the Free Software Foundation. | |
6 | */ | |
7 | #ifndef _UAPI__LINUX_BPF_H__ | |
8 | #define _UAPI__LINUX_BPF_H__ | |
9 | ||
10 | #include <linux/types.h> | |
c15952dc | 11 | #include <linux/bpf_common.h> |
daedfb22 AS |
12 | |
13 | /* Extended instruction set based on top of classic BPF */ | |
14 | ||
15 | /* instruction classes */ | |
16 | #define BPF_ALU64 0x07 /* alu mode in double word width */ | |
17 | ||
18 | /* ld/ldx fields */ | |
19 | #define BPF_DW 0x18 /* double word */ | |
20 | #define BPF_XADD 0xc0 /* exclusive add */ | |
21 | ||
22 | /* alu/jmp fields */ | |
23 | #define BPF_MOV 0xb0 /* mov reg to reg */ | |
24 | #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ | |
25 | ||
26 | /* change endianness of a register */ | |
27 | #define BPF_END 0xd0 /* flags for endianness conversion: */ | |
28 | #define BPF_TO_LE 0x00 /* convert to little-endian */ | |
29 | #define BPF_TO_BE 0x08 /* convert to big-endian */ | |
30 | #define BPF_FROM_LE BPF_TO_LE | |
31 | #define BPF_FROM_BE BPF_TO_BE | |
32 | ||
33 | #define BPF_JNE 0x50 /* jump != */ | |
34 | #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ | |
35 | #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ | |
36 | #define BPF_CALL 0x80 /* function call */ | |
37 | #define BPF_EXIT 0x90 /* function return */ | |
38 | ||
39 | /* Register numbers */ | |
40 | enum { | |
41 | BPF_REG_0 = 0, | |
42 | BPF_REG_1, | |
43 | BPF_REG_2, | |
44 | BPF_REG_3, | |
45 | BPF_REG_4, | |
46 | BPF_REG_5, | |
47 | BPF_REG_6, | |
48 | BPF_REG_7, | |
49 | BPF_REG_8, | |
50 | BPF_REG_9, | |
51 | BPF_REG_10, | |
52 | __MAX_BPF_REG, | |
53 | }; | |
54 | ||
55 | /* BPF has 10 general purpose 64-bit registers and stack frame. */ | |
56 | #define MAX_BPF_REG __MAX_BPF_REG | |
57 | ||
58 | struct bpf_insn { | |
59 | __u8 code; /* opcode */ | |
60 | __u8 dst_reg:4; /* dest register */ | |
61 | __u8 src_reg:4; /* source register */ | |
62 | __s16 off; /* signed offset */ | |
63 | __s32 imm; /* signed immediate constant */ | |
64 | }; | |
65 | ||
b2197755 | 66 | /* BPF syscall commands, see bpf(2) man-page for details. */ |
99c55f7d | 67 | enum bpf_cmd { |
99c55f7d | 68 | BPF_MAP_CREATE, |
db20fd2b | 69 | BPF_MAP_LOOKUP_ELEM, |
db20fd2b | 70 | BPF_MAP_UPDATE_ELEM, |
db20fd2b | 71 | BPF_MAP_DELETE_ELEM, |
db20fd2b | 72 | BPF_MAP_GET_NEXT_KEY, |
09756af4 | 73 | BPF_PROG_LOAD, |
b2197755 DB |
74 | BPF_OBJ_PIN, |
75 | BPF_OBJ_GET, | |
f4324551 DM |
76 | BPF_PROG_ATTACH, |
77 | BPF_PROG_DETACH, | |
99c55f7d AS |
78 | }; |
79 | ||
80 | enum bpf_map_type { | |
81 | BPF_MAP_TYPE_UNSPEC, | |
0f8e4bd8 | 82 | BPF_MAP_TYPE_HASH, |
28fbcfa0 | 83 | BPF_MAP_TYPE_ARRAY, |
04fd61ab | 84 | BPF_MAP_TYPE_PROG_ARRAY, |
ea317b26 | 85 | BPF_MAP_TYPE_PERF_EVENT_ARRAY, |
824bd0ce | 86 | BPF_MAP_TYPE_PERCPU_HASH, |
a10423b8 | 87 | BPF_MAP_TYPE_PERCPU_ARRAY, |
d5a3b1f6 | 88 | BPF_MAP_TYPE_STACK_TRACE, |
4ed8ec52 | 89 | BPF_MAP_TYPE_CGROUP_ARRAY, |
29ba732a | 90 | BPF_MAP_TYPE_LRU_HASH, |
8f844938 | 91 | BPF_MAP_TYPE_LRU_PERCPU_HASH, |
99c55f7d AS |
92 | }; |
93 | ||
09756af4 AS |
94 | enum bpf_prog_type { |
95 | BPF_PROG_TYPE_UNSPEC, | |
ddd872bc | 96 | BPF_PROG_TYPE_SOCKET_FILTER, |
2541517c | 97 | BPF_PROG_TYPE_KPROBE, |
96be4325 | 98 | BPF_PROG_TYPE_SCHED_CLS, |
94caee8c | 99 | BPF_PROG_TYPE_SCHED_ACT, |
98b5c2c6 | 100 | BPF_PROG_TYPE_TRACEPOINT, |
6a773a15 | 101 | BPF_PROG_TYPE_XDP, |
0515e599 | 102 | BPF_PROG_TYPE_PERF_EVENT, |
0e33661d | 103 | BPF_PROG_TYPE_CGROUP_SKB, |
61023658 | 104 | BPF_PROG_TYPE_CGROUP_SOCK, |
3a0af8fd TG |
105 | BPF_PROG_TYPE_LWT_IN, |
106 | BPF_PROG_TYPE_LWT_OUT, | |
107 | BPF_PROG_TYPE_LWT_XMIT, | |
09756af4 AS |
108 | }; |
109 | ||
0e33661d DM |
110 | enum bpf_attach_type { |
111 | BPF_CGROUP_INET_INGRESS, | |
112 | BPF_CGROUP_INET_EGRESS, | |
61023658 | 113 | BPF_CGROUP_INET_SOCK_CREATE, |
0e33661d DM |
114 | __MAX_BPF_ATTACH_TYPE |
115 | }; | |
116 | ||
117 | #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE | |
118 | ||
f1a66f85 DB |
119 | #define BPF_PSEUDO_MAP_FD 1 |
120 | ||
3274f520 AS |
121 | /* flags for BPF_MAP_UPDATE_ELEM command */ |
122 | #define BPF_ANY 0 /* create new element or update existing */ | |
123 | #define BPF_NOEXIST 1 /* create new element if it didn't exist */ | |
124 | #define BPF_EXIST 2 /* update existing element */ | |
125 | ||
6c905981 | 126 | #define BPF_F_NO_PREALLOC (1U << 0) |
29ba732a | 127 | /* Instead of having one common LRU list in the |
8f844938 | 128 | * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list |
29ba732a MKL |
129 | * which can scale and perform better. |
130 | * Note, the LRU nodes (including free nodes) cannot be moved | |
131 | * across different LRU lists. | |
132 | */ | |
133 | #define BPF_F_NO_COMMON_LRU (1U << 1) | |
6c905981 | 134 | |
99c55f7d AS |
135 | union bpf_attr { |
136 | struct { /* anonymous struct used by BPF_MAP_CREATE command */ | |
137 | __u32 map_type; /* one of enum bpf_map_type */ | |
138 | __u32 key_size; /* size of key in bytes */ | |
139 | __u32 value_size; /* size of value in bytes */ | |
140 | __u32 max_entries; /* max number of entries in a map */ | |
6c905981 | 141 | __u32 map_flags; /* prealloc or not */ |
99c55f7d | 142 | }; |
db20fd2b AS |
143 | |
144 | struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */ | |
145 | __u32 map_fd; | |
146 | __aligned_u64 key; | |
147 | union { | |
148 | __aligned_u64 value; | |
149 | __aligned_u64 next_key; | |
150 | }; | |
3274f520 | 151 | __u64 flags; |
db20fd2b | 152 | }; |
09756af4 AS |
153 | |
154 | struct { /* anonymous struct used by BPF_PROG_LOAD command */ | |
155 | __u32 prog_type; /* one of enum bpf_prog_type */ | |
156 | __u32 insn_cnt; | |
157 | __aligned_u64 insns; | |
158 | __aligned_u64 license; | |
cbd35700 AS |
159 | __u32 log_level; /* verbosity level of verifier */ |
160 | __u32 log_size; /* size of user buffer */ | |
161 | __aligned_u64 log_buf; /* user supplied buffer */ | |
2541517c | 162 | __u32 kern_version; /* checked when prog_type=kprobe */ |
09756af4 | 163 | }; |
b2197755 DB |
164 | |
165 | struct { /* anonymous struct used by BPF_OBJ_* commands */ | |
166 | __aligned_u64 pathname; | |
167 | __u32 bpf_fd; | |
168 | }; | |
f4324551 DM |
169 | |
170 | struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */ | |
171 | __u32 target_fd; /* container object to attach to */ | |
172 | __u32 attach_bpf_fd; /* eBPF program to attach */ | |
173 | __u32 attach_type; | |
174 | }; | |
99c55f7d AS |
175 | } __attribute__((aligned(8))); |
176 | ||
ebb676da TG |
177 | /* BPF helper function descriptions: |
178 | * | |
179 | * void *bpf_map_lookup_elem(&map, &key) | |
180 | * Return: Map value or NULL | |
181 | * | |
182 | * int bpf_map_update_elem(&map, &key, &value, flags) | |
183 | * Return: 0 on success or negative error | |
184 | * | |
185 | * int bpf_map_delete_elem(&map, &key) | |
186 | * Return: 0 on success or negative error | |
187 | * | |
188 | * int bpf_probe_read(void *dst, int size, void *src) | |
189 | * Return: 0 on success or negative error | |
190 | * | |
191 | * u64 bpf_ktime_get_ns(void) | |
192 | * Return: current ktime | |
193 | * | |
194 | * int bpf_trace_printk(const char *fmt, int fmt_size, ...) | |
195 | * Return: length of buffer written or negative error | |
196 | * | |
197 | * u32 bpf_prandom_u32(void) | |
198 | * Return: random value | |
199 | * | |
200 | * u32 bpf_raw_smp_processor_id(void) | |
201 | * Return: SMP processor ID | |
202 | * | |
203 | * int bpf_skb_store_bytes(skb, offset, from, len, flags) | |
204 | * store bytes into packet | |
205 | * @skb: pointer to skb | |
206 | * @offset: offset within packet from skb->mac_header | |
207 | * @from: pointer where to copy bytes from | |
208 | * @len: number of bytes to store into packet | |
209 | * @flags: bit 0 - if true, recompute skb->csum | |
210 | * other bits - reserved | |
211 | * Return: 0 on success or negative error | |
212 | * | |
213 | * int bpf_l3_csum_replace(skb, offset, from, to, flags) | |
214 | * recompute IP checksum | |
215 | * @skb: pointer to skb | |
216 | * @offset: offset within packet where IP checksum is located | |
217 | * @from: old value of header field | |
218 | * @to: new value of header field | |
219 | * @flags: bits 0-3 - size of header field | |
220 | * other bits - reserved | |
221 | * Return: 0 on success or negative error | |
222 | * | |
223 | * int bpf_l4_csum_replace(skb, offset, from, to, flags) | |
224 | * recompute TCP/UDP checksum | |
225 | * @skb: pointer to skb | |
226 | * @offset: offset within packet where TCP/UDP checksum is located | |
227 | * @from: old value of header field | |
228 | * @to: new value of header field | |
229 | * @flags: bits 0-3 - size of header field | |
230 | * bit 4 - is pseudo header | |
231 | * other bits - reserved | |
232 | * Return: 0 on success or negative error | |
233 | * | |
234 | * int bpf_tail_call(ctx, prog_array_map, index) | |
235 | * jump into another BPF program | |
236 | * @ctx: context pointer passed to next program | |
237 | * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY | |
238 | * @index: index inside array that selects specific program to run | |
239 | * Return: 0 on success or negative error | |
240 | * | |
241 | * int bpf_clone_redirect(skb, ifindex, flags) | |
242 | * redirect to another netdev | |
243 | * @skb: pointer to skb | |
244 | * @ifindex: ifindex of the net device | |
245 | * @flags: bit 0 - if set, redirect to ingress instead of egress | |
246 | * other bits - reserved | |
247 | * Return: 0 on success or negative error | |
248 | * | |
249 | * u64 bpf_get_current_pid_tgid(void) | |
250 | * Return: current->tgid << 32 | current->pid | |
251 | * | |
252 | * u64 bpf_get_current_uid_gid(void) | |
253 | * Return: current_gid << 32 | current_uid | |
254 | * | |
255 | * int bpf_get_current_comm(char *buf, int size_of_buf) | |
256 | * stores current->comm into buf | |
257 | * Return: 0 on success or negative error | |
258 | * | |
259 | * u32 bpf_get_cgroup_classid(skb) | |
260 | * retrieve a proc's classid | |
261 | * @skb: pointer to skb | |
262 | * Return: classid if != 0 | |
263 | * | |
264 | * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) | |
265 | * Return: 0 on success or negative error | |
266 | * | |
267 | * int bpf_skb_vlan_pop(skb) | |
268 | * Return: 0 on success or negative error | |
269 | * | |
270 | * int bpf_skb_get_tunnel_key(skb, key, size, flags) | |
271 | * int bpf_skb_set_tunnel_key(skb, key, size, flags) | |
272 | * retrieve or populate tunnel metadata | |
273 | * @skb: pointer to skb | |
274 | * @key: pointer to 'struct bpf_tunnel_key' | |
275 | * @size: size of 'struct bpf_tunnel_key' | |
276 | * @flags: room for future extensions | |
277 | * Return: 0 on success or negative error | |
278 | * | |
279 | * u64 bpf_perf_event_read(&map, index) | |
280 | * Return: Number events read or error code | |
281 | * | |
282 | * int bpf_redirect(ifindex, flags) | |
283 | * redirect to another netdev | |
284 | * @ifindex: ifindex of the net device | |
285 | * @flags: bit 0 - if set, redirect to ingress instead of egress | |
286 | * other bits - reserved | |
287 | * Return: TC_ACT_REDIRECT | |
288 | * | |
289 | * u32 bpf_get_route_realm(skb) | |
290 | * retrieve a dst's tclassid | |
291 | * @skb: pointer to skb | |
292 | * Return: realm if != 0 | |
293 | * | |
294 | * int bpf_perf_event_output(ctx, map, index, data, size) | |
295 | * output perf raw sample | |
296 | * @ctx: struct pt_regs* | |
297 | * @map: pointer to perf_event_array map | |
298 | * @index: index of event in the map | |
299 | * @data: data on stack to be output as raw data | |
300 | * @size: size of data | |
301 | * Return: 0 on success or negative error | |
302 | * | |
303 | * int bpf_get_stackid(ctx, map, flags) | |
304 | * walk user or kernel stack and return id | |
305 | * @ctx: struct pt_regs* | |
306 | * @map: pointer to stack_trace map | |
307 | * @flags: bits 0-7 - numer of stack frames to skip | |
308 | * bit 8 - collect user stack instead of kernel | |
309 | * bit 9 - compare stacks by hash only | |
310 | * bit 10 - if two different stacks hash into the same stackid | |
311 | * discard old | |
312 | * other bits - reserved | |
313 | * Return: >= 0 stackid on success or negative error | |
314 | * | |
315 | * s64 bpf_csum_diff(from, from_size, to, to_size, seed) | |
316 | * calculate csum diff | |
317 | * @from: raw from buffer | |
318 | * @from_size: length of from buffer | |
319 | * @to: raw to buffer | |
320 | * @to_size: length of to buffer | |
321 | * @seed: optional seed | |
322 | * Return: csum result or negative error code | |
323 | * | |
324 | * int bpf_skb_get_tunnel_opt(skb, opt, size) | |
325 | * retrieve tunnel options metadata | |
326 | * @skb: pointer to skb | |
327 | * @opt: pointer to raw tunnel option data | |
328 | * @size: size of @opt | |
329 | * Return: option size | |
330 | * | |
331 | * int bpf_skb_set_tunnel_opt(skb, opt, size) | |
332 | * populate tunnel options metadata | |
333 | * @skb: pointer to skb | |
334 | * @opt: pointer to raw tunnel option data | |
335 | * @size: size of @opt | |
336 | * Return: 0 on success or negative error | |
337 | * | |
338 | * int bpf_skb_change_proto(skb, proto, flags) | |
339 | * Change protocol of the skb. Currently supported is v4 -> v6, | |
340 | * v6 -> v4 transitions. The helper will also resize the skb. eBPF | |
341 | * program is expected to fill the new headers via skb_store_bytes | |
342 | * and lX_csum_replace. | |
343 | * @skb: pointer to skb | |
344 | * @proto: new skb->protocol type | |
345 | * @flags: reserved | |
346 | * Return: 0 on success or negative error | |
347 | * | |
348 | * int bpf_skb_change_type(skb, type) | |
349 | * Change packet type of skb. | |
350 | * @skb: pointer to skb | |
351 | * @type: new skb->pkt_type type | |
352 | * Return: 0 on success or negative error | |
353 | * | |
354 | * int bpf_skb_under_cgroup(skb, map, index) | |
355 | * Check cgroup2 membership of skb | |
356 | * @skb: pointer to skb | |
357 | * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type | |
358 | * @index: index of the cgroup in the bpf_map | |
359 | * Return: | |
360 | * == 0 skb failed the cgroup2 descendant test | |
361 | * == 1 skb succeeded the cgroup2 descendant test | |
362 | * < 0 error | |
363 | * | |
364 | * u32 bpf_get_hash_recalc(skb) | |
365 | * Retrieve and possibly recalculate skb->hash. | |
366 | * @skb: pointer to skb | |
367 | * Return: hash | |
368 | * | |
369 | * u64 bpf_get_current_task(void) | |
370 | * Returns current task_struct | |
371 | * Return: current | |
372 | * | |
373 | * int bpf_probe_write_user(void *dst, void *src, int len) | |
374 | * safely attempt to write to a location | |
375 | * @dst: destination address in userspace | |
376 | * @src: source address on stack | |
377 | * @len: number of bytes to copy | |
378 | * Return: 0 on success or negative error | |
379 | * | |
380 | * int bpf_current_task_under_cgroup(map, index) | |
381 | * Check cgroup2 membership of current task | |
382 | * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type | |
383 | * @index: index of the cgroup in the bpf_map | |
384 | * Return: | |
385 | * == 0 current failed the cgroup2 descendant test | |
386 | * == 1 current succeeded the cgroup2 descendant test | |
387 | * < 0 error | |
388 | * | |
389 | * int bpf_skb_change_tail(skb, len, flags) | |
390 | * The helper will resize the skb to the given new size, to be used f.e. | |
391 | * with control messages. | |
392 | * @skb: pointer to skb | |
393 | * @len: new skb length | |
394 | * @flags: reserved | |
395 | * Return: 0 on success or negative error | |
396 | * | |
397 | * int bpf_skb_pull_data(skb, len) | |
398 | * The helper will pull in non-linear data in case the skb is non-linear | |
399 | * and not all of len are part of the linear section. Only needed for | |
400 | * read/write with direct packet access. | |
401 | * @skb: pointer to skb | |
402 | * @len: len to make read/writeable | |
403 | * Return: 0 on success or negative error | |
404 | * | |
405 | * s64 bpf_csum_update(skb, csum) | |
406 | * Adds csum into skb->csum in case of CHECKSUM_COMPLETE. | |
407 | * @skb: pointer to skb | |
408 | * @csum: csum to add | |
409 | * Return: csum on success or negative error | |
410 | * | |
411 | * void bpf_set_hash_invalid(skb) | |
412 | * Invalidate current skb->hash. | |
413 | * @skb: pointer to skb | |
414 | * | |
415 | * int bpf_get_numa_node_id() | |
416 | * Return: Id of current NUMA node. | |
3a0af8fd TG |
417 | * |
418 | * int bpf_skb_change_head() | |
419 | * Grows headroom of skb and adjusts MAC header offset accordingly. | |
420 | * Will extends/reallocae as required automatically. | |
421 | * May change skb data pointer and will thus invalidate any check | |
422 | * performed for direct packet access. | |
423 | * @skb: pointer to skb | |
424 | * @len: length of header to be pushed in front | |
425 | * @flags: Flags (unused for now) | |
426 | * Return: 0 on success or negative error | |
ebb676da TG |
427 | */ |
428 | #define __BPF_FUNC_MAPPER(FN) \ | |
429 | FN(unspec), \ | |
430 | FN(map_lookup_elem), \ | |
431 | FN(map_update_elem), \ | |
432 | FN(map_delete_elem), \ | |
433 | FN(probe_read), \ | |
434 | FN(ktime_get_ns), \ | |
435 | FN(trace_printk), \ | |
436 | FN(get_prandom_u32), \ | |
437 | FN(get_smp_processor_id), \ | |
438 | FN(skb_store_bytes), \ | |
439 | FN(l3_csum_replace), \ | |
440 | FN(l4_csum_replace), \ | |
441 | FN(tail_call), \ | |
442 | FN(clone_redirect), \ | |
443 | FN(get_current_pid_tgid), \ | |
444 | FN(get_current_uid_gid), \ | |
445 | FN(get_current_comm), \ | |
446 | FN(get_cgroup_classid), \ | |
447 | FN(skb_vlan_push), \ | |
448 | FN(skb_vlan_pop), \ | |
449 | FN(skb_get_tunnel_key), \ | |
450 | FN(skb_set_tunnel_key), \ | |
451 | FN(perf_event_read), \ | |
452 | FN(redirect), \ | |
453 | FN(get_route_realm), \ | |
454 | FN(perf_event_output), \ | |
455 | FN(skb_load_bytes), \ | |
456 | FN(get_stackid), \ | |
457 | FN(csum_diff), \ | |
458 | FN(skb_get_tunnel_opt), \ | |
459 | FN(skb_set_tunnel_opt), \ | |
460 | FN(skb_change_proto), \ | |
461 | FN(skb_change_type), \ | |
462 | FN(skb_under_cgroup), \ | |
463 | FN(get_hash_recalc), \ | |
464 | FN(get_current_task), \ | |
465 | FN(probe_write_user), \ | |
466 | FN(current_task_under_cgroup), \ | |
467 | FN(skb_change_tail), \ | |
468 | FN(skb_pull_data), \ | |
469 | FN(csum_update), \ | |
470 | FN(set_hash_invalid), \ | |
3a0af8fd TG |
471 | FN(get_numa_node_id), \ |
472 | FN(skb_change_head), | |
ebb676da | 473 | |
09756af4 AS |
474 | /* integer value in 'imm' field of BPF_CALL instruction selects which helper |
475 | * function eBPF program intends to call | |
476 | */ | |
ebb676da | 477 | #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x |
09756af4 | 478 | enum bpf_func_id { |
ebb676da | 479 | __BPF_FUNC_MAPPER(__BPF_ENUM_FN) |
09756af4 AS |
480 | __BPF_FUNC_MAX_ID, |
481 | }; | |
ebb676da | 482 | #undef __BPF_ENUM_FN |
09756af4 | 483 | |
781c53bc DB |
484 | /* All flags used by eBPF helper functions, placed here. */ |
485 | ||
486 | /* BPF_FUNC_skb_store_bytes flags. */ | |
487 | #define BPF_F_RECOMPUTE_CSUM (1ULL << 0) | |
8afd54c8 | 488 | #define BPF_F_INVALIDATE_HASH (1ULL << 1) |
781c53bc DB |
489 | |
490 | /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags. | |
491 | * First 4 bits are for passing the header field size. | |
492 | */ | |
493 | #define BPF_F_HDR_FIELD_MASK 0xfULL | |
494 | ||
495 | /* BPF_FUNC_l4_csum_replace flags. */ | |
496 | #define BPF_F_PSEUDO_HDR (1ULL << 4) | |
2f72959a | 497 | #define BPF_F_MARK_MANGLED_0 (1ULL << 5) |
781c53bc DB |
498 | |
499 | /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */ | |
500 | #define BPF_F_INGRESS (1ULL << 0) | |
501 | ||
c6c33454 DB |
502 | /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */ |
503 | #define BPF_F_TUNINFO_IPV6 (1ULL << 0) | |
504 | ||
d5a3b1f6 AS |
505 | /* BPF_FUNC_get_stackid flags. */ |
506 | #define BPF_F_SKIP_FIELD_MASK 0xffULL | |
507 | #define BPF_F_USER_STACK (1ULL << 8) | |
508 | #define BPF_F_FAST_STACK_CMP (1ULL << 9) | |
509 | #define BPF_F_REUSE_STACKID (1ULL << 10) | |
510 | ||
2da897e5 DB |
511 | /* BPF_FUNC_skb_set_tunnel_key flags. */ |
512 | #define BPF_F_ZERO_CSUM_TX (1ULL << 1) | |
22080870 | 513 | #define BPF_F_DONT_FRAGMENT (1ULL << 2) |
2da897e5 | 514 | |
6816a7ff | 515 | /* BPF_FUNC_perf_event_output and BPF_FUNC_perf_event_read flags. */ |
1e33759c DB |
516 | #define BPF_F_INDEX_MASK 0xffffffffULL |
517 | #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK | |
555c8a86 DB |
518 | /* BPF_FUNC_perf_event_output for sk_buff input context. */ |
519 | #define BPF_F_CTXLEN_MASK (0xfffffULL << 32) | |
1e33759c | 520 | |
9bac3d6d AS |
521 | /* user accessible mirror of in-kernel sk_buff. |
522 | * new fields can only be added to the end of this structure | |
523 | */ | |
524 | struct __sk_buff { | |
525 | __u32 len; | |
526 | __u32 pkt_type; | |
527 | __u32 mark; | |
528 | __u32 queue_mapping; | |
c2497395 AS |
529 | __u32 protocol; |
530 | __u32 vlan_present; | |
531 | __u32 vlan_tci; | |
27cd5452 | 532 | __u32 vlan_proto; |
bcad5718 | 533 | __u32 priority; |
37e82c2f AS |
534 | __u32 ingress_ifindex; |
535 | __u32 ifindex; | |
d691f9e8 AS |
536 | __u32 tc_index; |
537 | __u32 cb[5]; | |
ba7591d8 | 538 | __u32 hash; |
045efa82 | 539 | __u32 tc_classid; |
969bf05e AS |
540 | __u32 data; |
541 | __u32 data_end; | |
9bac3d6d AS |
542 | }; |
543 | ||
d3aa45ce AS |
544 | struct bpf_tunnel_key { |
545 | __u32 tunnel_id; | |
c6c33454 DB |
546 | union { |
547 | __u32 remote_ipv4; | |
548 | __u32 remote_ipv6[4]; | |
549 | }; | |
550 | __u8 tunnel_tos; | |
551 | __u8 tunnel_ttl; | |
c0e760c9 | 552 | __u16 tunnel_ext; |
4018ab18 | 553 | __u32 tunnel_label; |
d3aa45ce AS |
554 | }; |
555 | ||
3a0af8fd TG |
556 | /* Generic BPF return codes which all BPF program types may support. |
557 | * The values are binary compatible with their TC_ACT_* counter-part to | |
558 | * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT | |
559 | * programs. | |
560 | * | |
561 | * XDP is handled seprately, see XDP_*. | |
562 | */ | |
563 | enum bpf_ret_code { | |
564 | BPF_OK = 0, | |
565 | /* 1 reserved */ | |
566 | BPF_DROP = 2, | |
567 | /* 3-6 reserved */ | |
568 | BPF_REDIRECT = 7, | |
569 | /* >127 are reserved for prog type specific return codes */ | |
570 | }; | |
571 | ||
61023658 DA |
572 | struct bpf_sock { |
573 | __u32 bound_dev_if; | |
574 | }; | |
575 | ||
6a773a15 BB |
576 | /* User return codes for XDP prog type. |
577 | * A valid XDP program must return one of these defined values. All other | |
578 | * return codes are reserved for future use. Unknown return codes will result | |
579 | * in packet drop. | |
580 | */ | |
581 | enum xdp_action { | |
582 | XDP_ABORTED = 0, | |
583 | XDP_DROP, | |
584 | XDP_PASS, | |
6ce96ca3 | 585 | XDP_TX, |
6a773a15 BB |
586 | }; |
587 | ||
588 | /* user accessible metadata for XDP packet hook | |
589 | * new fields must be added to the end of this structure | |
590 | */ | |
591 | struct xdp_md { | |
592 | __u32 data; | |
593 | __u32 data_end; | |
594 | }; | |
595 | ||
daedfb22 | 596 | #endif /* _UAPI__LINUX_BPF_H__ */ |