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1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
---|---|
2 | /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
3 | * |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public |
6 | * License as published by the Free Software Foundation. |
7 | */ |
8 | #ifndef __LINUX_BPF_H__ |
9 | #define __LINUX_BPF_H__ |
10 | |
11 | #include <linux/types.h> |
12 | #include <linux/bpf_common.h> |
13 | |
14 | /* Extended instruction set based on top of classic BPF */ |
15 | |
16 | /* instruction classes */ |
17 | #define BPF_ALU64 0x07 /* alu mode in double word width */ |
18 | |
19 | /* ld/ldx fields */ |
20 | #define BPF_DW 0x18 /* double word (64-bit) */ |
21 | #define BPF_XADD 0xc0 /* exclusive add */ |
22 | |
23 | /* alu/jmp fields */ |
24 | #define BPF_MOV 0xb0 /* mov reg to reg */ |
25 | #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ |
26 | |
27 | /* change endianness of a register */ |
28 | #define BPF_END 0xd0 /* flags for endianness conversion: */ |
29 | #define BPF_TO_LE 0x00 /* convert to little-endian */ |
30 | #define BPF_TO_BE 0x08 /* convert to big-endian */ |
31 | #define BPF_FROM_LE BPF_TO_LE |
32 | #define BPF_FROM_BE BPF_TO_BE |
33 | |
34 | /* jmp encodings */ |
35 | #define BPF_JNE 0x50 /* jump != */ |
36 | #define BPF_JLT 0xa0 /* LT is unsigned, '<' */ |
37 | #define BPF_JLE 0xb0 /* LE is unsigned, '<=' */ |
38 | #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ |
39 | #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ |
40 | #define BPF_JSLT 0xc0 /* SLT is signed, '<' */ |
41 | #define BPF_JSLE 0xd0 /* SLE is signed, '<=' */ |
42 | #define BPF_CALL 0x80 /* function call */ |
43 | #define BPF_EXIT 0x90 /* function return */ |
44 | |
45 | /* Register numbers */ |
46 | enum { |
47 | BPF_REG_0 = 0, |
48 | BPF_REG_1, |
49 | BPF_REG_2, |
50 | BPF_REG_3, |
51 | BPF_REG_4, |
52 | BPF_REG_5, |
53 | BPF_REG_6, |
54 | BPF_REG_7, |
55 | BPF_REG_8, |
56 | BPF_REG_9, |
57 | BPF_REG_10, |
58 | __MAX_BPF_REG, |
59 | }; |
60 | |
61 | /* BPF has 10 general purpose 64-bit registers and stack frame. */ |
62 | #define MAX_BPF_REG __MAX_BPF_REG |
63 | |
64 | struct bpf_insn { |
65 | __u8 code; /* opcode */ |
66 | __u8 dst_reg:4; /* dest register */ |
67 | __u8 src_reg:4; /* source register */ |
68 | __s16 off; /* signed offset */ |
69 | __s32 imm; /* signed immediate constant */ |
70 | }; |
71 | |
72 | /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */ |
73 | struct bpf_lpm_trie_key { |
74 | __u32 prefixlen; /* up to 32 for AF_INET, 128 for AF_INET6 */ |
75 | __u8 data[0]; /* Arbitrary size */ |
76 | }; |
77 | |
78 | /* BPF syscall commands, see bpf(2) man-page for details. */ |
79 | enum bpf_cmd { |
80 | BPF_MAP_CREATE, |
81 | BPF_MAP_LOOKUP_ELEM, |
82 | BPF_MAP_UPDATE_ELEM, |
83 | BPF_MAP_DELETE_ELEM, |
84 | BPF_MAP_GET_NEXT_KEY, |
85 | BPF_PROG_LOAD, |
86 | BPF_OBJ_PIN, |
87 | BPF_OBJ_GET, |
88 | BPF_PROG_ATTACH, |
89 | BPF_PROG_DETACH, |
90 | BPF_PROG_TEST_RUN, |
91 | BPF_PROG_GET_NEXT_ID, |
92 | BPF_MAP_GET_NEXT_ID, |
93 | BPF_PROG_GET_FD_BY_ID, |
94 | BPF_MAP_GET_FD_BY_ID, |
95 | BPF_OBJ_GET_INFO_BY_FD, |
96 | BPF_PROG_QUERY, |
97 | BPF_RAW_TRACEPOINT_OPEN, |
98 | }; |
99 | |
100 | enum bpf_map_type { |
101 | BPF_MAP_TYPE_UNSPEC, |
102 | BPF_MAP_TYPE_HASH, |
103 | BPF_MAP_TYPE_ARRAY, |
104 | BPF_MAP_TYPE_PROG_ARRAY, |
105 | BPF_MAP_TYPE_PERF_EVENT_ARRAY, |
106 | BPF_MAP_TYPE_PERCPU_HASH, |
107 | BPF_MAP_TYPE_PERCPU_ARRAY, |
108 | BPF_MAP_TYPE_STACK_TRACE, |
109 | BPF_MAP_TYPE_CGROUP_ARRAY, |
110 | BPF_MAP_TYPE_LRU_HASH, |
111 | BPF_MAP_TYPE_LRU_PERCPU_HASH, |
112 | BPF_MAP_TYPE_LPM_TRIE, |
113 | BPF_MAP_TYPE_ARRAY_OF_MAPS, |
114 | BPF_MAP_TYPE_HASH_OF_MAPS, |
115 | BPF_MAP_TYPE_DEVMAP, |
116 | BPF_MAP_TYPE_SOCKMAP, |
117 | BPF_MAP_TYPE_CPUMAP, |
118 | }; |
119 | |
120 | enum bpf_prog_type { |
121 | BPF_PROG_TYPE_UNSPEC, |
122 | BPF_PROG_TYPE_SOCKET_FILTER, |
123 | BPF_PROG_TYPE_KPROBE, |
124 | BPF_PROG_TYPE_SCHED_CLS, |
125 | BPF_PROG_TYPE_SCHED_ACT, |
126 | BPF_PROG_TYPE_TRACEPOINT, |
127 | BPF_PROG_TYPE_XDP, |
128 | BPF_PROG_TYPE_PERF_EVENT, |
129 | BPF_PROG_TYPE_CGROUP_SKB, |
130 | BPF_PROG_TYPE_CGROUP_SOCK, |
131 | BPF_PROG_TYPE_LWT_IN, |
132 | BPF_PROG_TYPE_LWT_OUT, |
133 | BPF_PROG_TYPE_LWT_XMIT, |
134 | BPF_PROG_TYPE_SOCK_OPS, |
135 | BPF_PROG_TYPE_SK_SKB, |
136 | BPF_PROG_TYPE_CGROUP_DEVICE, |
137 | BPF_PROG_TYPE_SK_MSG, |
138 | BPF_PROG_TYPE_RAW_TRACEPOINT, |
139 | BPF_PROG_TYPE_CGROUP_SOCK_ADDR, |
140 | }; |
141 | |
142 | enum bpf_attach_type { |
143 | BPF_CGROUP_INET_INGRESS, |
144 | BPF_CGROUP_INET_EGRESS, |
145 | BPF_CGROUP_INET_SOCK_CREATE, |
146 | BPF_CGROUP_SOCK_OPS, |
147 | BPF_SK_SKB_STREAM_PARSER, |
148 | BPF_SK_SKB_STREAM_VERDICT, |
149 | BPF_CGROUP_DEVICE, |
150 | BPF_SK_MSG_VERDICT, |
151 | BPF_CGROUP_INET4_BIND, |
152 | BPF_CGROUP_INET6_BIND, |
153 | BPF_CGROUP_INET4_CONNECT, |
154 | BPF_CGROUP_INET6_CONNECT, |
155 | BPF_CGROUP_INET4_POST_BIND, |
156 | BPF_CGROUP_INET6_POST_BIND, |
157 | __MAX_BPF_ATTACH_TYPE |
158 | }; |
159 | |
160 | #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE |
161 | |
162 | /* cgroup-bpf attach flags used in BPF_PROG_ATTACH command |
163 | * |
164 | * NONE(default): No further bpf programs allowed in the subtree. |
165 | * |
166 | * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program, |
167 | * the program in this cgroup yields to sub-cgroup program. |
168 | * |
169 | * BPF_F_ALLOW_MULTI: If a sub-cgroup installs some bpf program, |
170 | * that cgroup program gets run in addition to the program in this cgroup. |
171 | * |
172 | * Only one program is allowed to be attached to a cgroup with |
173 | * NONE or BPF_F_ALLOW_OVERRIDE flag. |
174 | * Attaching another program on top of NONE or BPF_F_ALLOW_OVERRIDE will |
175 | * release old program and attach the new one. Attach flags has to match. |
176 | * |
177 | * Multiple programs are allowed to be attached to a cgroup with |
178 | * BPF_F_ALLOW_MULTI flag. They are executed in FIFO order |
179 | * (those that were attached first, run first) |
180 | * The programs of sub-cgroup are executed first, then programs of |
181 | * this cgroup and then programs of parent cgroup. |
182 | * When children program makes decision (like picking TCP CA or sock bind) |
183 | * parent program has a chance to override it. |
184 | * |
185 | * A cgroup with MULTI or OVERRIDE flag allows any attach flags in sub-cgroups. |
186 | * A cgroup with NONE doesn't allow any programs in sub-cgroups. |
187 | * Ex1: |
188 | * cgrp1 (MULTI progs A, B) -> |
189 | * cgrp2 (OVERRIDE prog C) -> |
190 | * cgrp3 (MULTI prog D) -> |
191 | * cgrp4 (OVERRIDE prog E) -> |
192 | * cgrp5 (NONE prog F) |
193 | * the event in cgrp5 triggers execution of F,D,A,B in that order. |
194 | * if prog F is detached, the execution is E,D,A,B |
195 | * if prog F and D are detached, the execution is E,A,B |
196 | * if prog F, E and D are detached, the execution is C,A,B |
197 | * |
198 | * All eligible programs are executed regardless of return code from |
199 | * earlier programs. |
200 | */ |
201 | #define BPF_F_ALLOW_OVERRIDE (1U << 0) |
202 | #define BPF_F_ALLOW_MULTI (1U << 1) |
203 | |
204 | /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the |
205 | * verifier will perform strict alignment checking as if the kernel |
206 | * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set, |
207 | * and NET_IP_ALIGN defined to 2. |
208 | */ |
209 | #define BPF_F_STRICT_ALIGNMENT (1U << 0) |
210 | |
211 | /* when bpf_ldimm64->src_reg == BPF_PSEUDO_MAP_FD, bpf_ldimm64->imm == fd */ |
212 | #define BPF_PSEUDO_MAP_FD 1 |
213 | |
214 | /* when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative |
215 | * offset to another bpf function |
216 | */ |
217 | #define BPF_PSEUDO_CALL 1 |
218 | |
219 | /* flags for BPF_MAP_UPDATE_ELEM command */ |
220 | #define BPF_ANY 0 /* create new element or update existing */ |
221 | #define BPF_NOEXIST 1 /* create new element if it didn't exist */ |
222 | #define BPF_EXIST 2 /* update existing element */ |
223 | |
224 | /* flags for BPF_MAP_CREATE command */ |
225 | #define BPF_F_NO_PREALLOC (1U << 0) |
226 | /* Instead of having one common LRU list in the |
227 | * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list |
228 | * which can scale and perform better. |
229 | * Note, the LRU nodes (including free nodes) cannot be moved |
230 | * across different LRU lists. |
231 | */ |
232 | #define BPF_F_NO_COMMON_LRU (1U << 1) |
233 | /* Specify numa node during map creation */ |
234 | #define BPF_F_NUMA_NODE (1U << 2) |
235 | |
236 | /* flags for BPF_PROG_QUERY */ |
237 | #define BPF_F_QUERY_EFFECTIVE (1U << 0) |
238 | |
239 | #define BPF_OBJ_NAME_LEN 16U |
240 | |
241 | /* Flags for accessing BPF object */ |
242 | #define BPF_F_RDONLY (1U << 3) |
243 | #define BPF_F_WRONLY (1U << 4) |
244 | |
245 | /* Flag for stack_map, store build_id+offset instead of pointer */ |
246 | #define BPF_F_STACK_BUILD_ID (1U << 5) |
247 | |
248 | enum bpf_stack_build_id_status { |
249 | /* user space need an empty entry to identify end of a trace */ |
250 | BPF_STACK_BUILD_ID_EMPTY = 0, |
251 | /* with valid build_id and offset */ |
252 | BPF_STACK_BUILD_ID_VALID = 1, |
253 | /* couldn't get build_id, fallback to ip */ |
254 | BPF_STACK_BUILD_ID_IP = 2, |
255 | }; |
256 | |
257 | #define BPF_BUILD_ID_SIZE 20 |
258 | struct bpf_stack_build_id { |
259 | __s32 status; |
260 | unsigned char build_id[BPF_BUILD_ID_SIZE]; |
261 | union { |
262 | __u64 offset; |
263 | __u64 ip; |
264 | }; |
265 | }; |
266 | |
267 | union bpf_attr { |
268 | struct { /* anonymous struct used by BPF_MAP_CREATE command */ |
269 | __u32 map_type; /* one of enum bpf_map_type */ |
270 | __u32 key_size; /* size of key in bytes */ |
271 | __u32 value_size; /* size of value in bytes */ |
272 | __u32 max_entries; /* max number of entries in a map */ |
273 | __u32 map_flags; /* BPF_MAP_CREATE related |
274 | * flags defined above. |
275 | */ |
276 | __u32 inner_map_fd; /* fd pointing to the inner map */ |
277 | __u32 numa_node; /* numa node (effective only if |
278 | * BPF_F_NUMA_NODE is set). |
279 | */ |
280 | char map_name[BPF_OBJ_NAME_LEN]; |
281 | __u32 map_ifindex; /* ifindex of netdev to create on */ |
282 | }; |
283 | |
284 | struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */ |
285 | __u32 map_fd; |
286 | __aligned_u64 key; |
287 | union { |
288 | __aligned_u64 value; |
289 | __aligned_u64 next_key; |
290 | }; |
291 | __u64 flags; |
292 | }; |
293 | |
294 | struct { /* anonymous struct used by BPF_PROG_LOAD command */ |
295 | __u32 prog_type; /* one of enum bpf_prog_type */ |
296 | __u32 insn_cnt; |
297 | __aligned_u64 insns; |
298 | __aligned_u64 license; |
299 | __u32 log_level; /* verbosity level of verifier */ |
300 | __u32 log_size; /* size of user buffer */ |
301 | __aligned_u64 log_buf; /* user supplied buffer */ |
302 | __u32 kern_version; /* checked when prog_type=kprobe */ |
303 | __u32 prog_flags; |
304 | char prog_name[BPF_OBJ_NAME_LEN]; |
305 | __u32 prog_ifindex; /* ifindex of netdev to prep for */ |
306 | /* For some prog types expected attach type must be known at |
307 | * load time to verify attach type specific parts of prog |
308 | * (context accesses, allowed helpers, etc). |
309 | */ |
310 | __u32 expected_attach_type; |
311 | }; |
312 | |
313 | struct { /* anonymous struct used by BPF_OBJ_* commands */ |
314 | __aligned_u64 pathname; |
315 | __u32 bpf_fd; |
316 | __u32 file_flags; |
317 | }; |
318 | |
319 | struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */ |
320 | __u32 target_fd; /* container object to attach to */ |
321 | __u32 attach_bpf_fd; /* eBPF program to attach */ |
322 | __u32 attach_type; |
323 | __u32 attach_flags; |
324 | }; |
325 | |
326 | struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */ |
327 | __u32 prog_fd; |
328 | __u32 retval; |
329 | __u32 data_size_in; |
330 | __u32 data_size_out; |
331 | __aligned_u64 data_in; |
332 | __aligned_u64 data_out; |
333 | __u32 repeat; |
334 | __u32 duration; |
335 | } test; |
336 | |
337 | struct { /* anonymous struct used by BPF_*_GET_*_ID */ |
338 | union { |
339 | __u32 start_id; |
340 | __u32 prog_id; |
341 | __u32 map_id; |
342 | }; |
343 | __u32 next_id; |
344 | __u32 open_flags; |
345 | }; |
346 | |
347 | struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */ |
348 | __u32 bpf_fd; |
349 | __u32 info_len; |
350 | __aligned_u64 info; |
351 | } info; |
352 | |
353 | struct { /* anonymous struct used by BPF_PROG_QUERY command */ |
354 | __u32 target_fd; /* container object to query */ |
355 | __u32 attach_type; |
356 | __u32 query_flags; |
357 | __u32 attach_flags; |
358 | __aligned_u64 prog_ids; |
359 | __u32 prog_cnt; |
360 | } query; |
361 | |
362 | struct { |
363 | __u64 name; |
364 | __u32 prog_fd; |
365 | } raw_tracepoint; |
366 | } __attribute__((aligned(8))); |
367 | |
368 | /* BPF helper function descriptions: |
369 | * |
370 | * void *bpf_map_lookup_elem(&map, &key) |
371 | * Return: Map value or NULL |
372 | * |
373 | * int bpf_map_update_elem(&map, &key, &value, flags) |
374 | * Return: 0 on success or negative error |
375 | * |
376 | * int bpf_map_delete_elem(&map, &key) |
377 | * Return: 0 on success or negative error |
378 | * |
379 | * int bpf_probe_read(void *dst, int size, void *src) |
380 | * Return: 0 on success or negative error |
381 | * |
382 | * u64 bpf_ktime_get_ns(void) |
383 | * Return: current ktime |
384 | * |
385 | * int bpf_trace_printk(const char *fmt, int fmt_size, ...) |
386 | * Return: length of buffer written or negative error |
387 | * |
388 | * u32 bpf_prandom_u32(void) |
389 | * Return: random value |
390 | * |
391 | * u32 bpf_raw_smp_processor_id(void) |
392 | * Return: SMP processor ID |
393 | * |
394 | * int bpf_skb_store_bytes(skb, offset, from, len, flags) |
395 | * store bytes into packet |
396 | * @skb: pointer to skb |
397 | * @offset: offset within packet from skb->mac_header |
398 | * @from: pointer where to copy bytes from |
399 | * @len: number of bytes to store into packet |
400 | * @flags: bit 0 - if true, recompute skb->csum |
401 | * other bits - reserved |
402 | * Return: 0 on success or negative error |
403 | * |
404 | * int bpf_l3_csum_replace(skb, offset, from, to, flags) |
405 | * recompute IP checksum |
406 | * @skb: pointer to skb |
407 | * @offset: offset within packet where IP checksum is located |
408 | * @from: old value of header field |
409 | * @to: new value of header field |
410 | * @flags: bits 0-3 - size of header field |
411 | * other bits - reserved |
412 | * Return: 0 on success or negative error |
413 | * |
414 | * int bpf_l4_csum_replace(skb, offset, from, to, flags) |
415 | * recompute TCP/UDP checksum |
416 | * @skb: pointer to skb |
417 | * @offset: offset within packet where TCP/UDP checksum is located |
418 | * @from: old value of header field |
419 | * @to: new value of header field |
420 | * @flags: bits 0-3 - size of header field |
421 | * bit 4 - is pseudo header |
422 | * other bits - reserved |
423 | * Return: 0 on success or negative error |
424 | * |
425 | * int bpf_tail_call(ctx, prog_array_map, index) |
426 | * jump into another BPF program |
427 | * @ctx: context pointer passed to next program |
428 | * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY |
429 | * @index: 32-bit index inside array that selects specific program to run |
430 | * Return: 0 on success or negative error |
431 | * |
432 | * int bpf_clone_redirect(skb, ifindex, flags) |
433 | * redirect to another netdev |
434 | * @skb: pointer to skb |
435 | * @ifindex: ifindex of the net device |
436 | * @flags: bit 0 - if set, redirect to ingress instead of egress |
437 | * other bits - reserved |
438 | * Return: 0 on success or negative error |
439 | * |
440 | * u64 bpf_get_current_pid_tgid(void) |
441 | * Return: current->tgid << 32 | current->pid |
442 | * |
443 | * u64 bpf_get_current_uid_gid(void) |
444 | * Return: current_gid << 32 | current_uid |
445 | * |
446 | * int bpf_get_current_comm(char *buf, int size_of_buf) |
447 | * stores current->comm into buf |
448 | * Return: 0 on success or negative error |
449 | * |
450 | * u32 bpf_get_cgroup_classid(skb) |
451 | * retrieve a proc's classid |
452 | * @skb: pointer to skb |
453 | * Return: classid if != 0 |
454 | * |
455 | * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) |
456 | * Return: 0 on success or negative error |
457 | * |
458 | * int bpf_skb_vlan_pop(skb) |
459 | * Return: 0 on success or negative error |
460 | * |
461 | * int bpf_skb_get_tunnel_key(skb, key, size, flags) |
462 | * int bpf_skb_set_tunnel_key(skb, key, size, flags) |
463 | * retrieve or populate tunnel metadata |
464 | * @skb: pointer to skb |
465 | * @key: pointer to 'struct bpf_tunnel_key' |
466 | * @size: size of 'struct bpf_tunnel_key' |
467 | * @flags: room for future extensions |
468 | * Return: 0 on success or negative error |
469 | * |
470 | * u64 bpf_perf_event_read(map, flags) |
471 | * read perf event counter value |
472 | * @map: pointer to perf_event_array map |
473 | * @flags: index of event in the map or bitmask flags |
474 | * Return: value of perf event counter read or error code |
475 | * |
476 | * int bpf_redirect(ifindex, flags) |
477 | * redirect to another netdev |
478 | * @ifindex: ifindex of the net device |
479 | * @flags: |
480 | * cls_bpf: |
481 | * bit 0 - if set, redirect to ingress instead of egress |
482 | * other bits - reserved |
483 | * xdp_bpf: |
484 | * all bits - reserved |
485 | * Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error |
486 | * xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error |
487 | * int bpf_redirect_map(map, key, flags) |
488 | * redirect to endpoint in map |
489 | * @map: pointer to dev map |
490 | * @key: index in map to lookup |
491 | * @flags: -- |
492 | * Return: XDP_REDIRECT on success or XDP_ABORT on error |
493 | * |
494 | * u32 bpf_get_route_realm(skb) |
495 | * retrieve a dst's tclassid |
496 | * @skb: pointer to skb |
497 | * Return: realm if != 0 |
498 | * |
499 | * int bpf_perf_event_output(ctx, map, flags, data, size) |
500 | * output perf raw sample |
501 | * @ctx: struct pt_regs* |
502 | * @map: pointer to perf_event_array map |
503 | * @flags: index of event in the map or bitmask flags |
504 | * @data: data on stack to be output as raw data |
505 | * @size: size of data |
506 | * Return: 0 on success or negative error |
507 | * |
508 | * int bpf_get_stackid(ctx, map, flags) |
509 | * walk user or kernel stack and return id |
510 | * @ctx: struct pt_regs* |
511 | * @map: pointer to stack_trace map |
512 | * @flags: bits 0-7 - numer of stack frames to skip |
513 | * bit 8 - collect user stack instead of kernel |
514 | * bit 9 - compare stacks by hash only |
515 | * bit 10 - if two different stacks hash into the same stackid |
516 | * discard old |
517 | * other bits - reserved |
518 | * Return: >= 0 stackid on success or negative error |
519 | * |
520 | * s64 bpf_csum_diff(from, from_size, to, to_size, seed) |
521 | * calculate csum diff |
522 | * @from: raw from buffer |
523 | * @from_size: length of from buffer |
524 | * @to: raw to buffer |
525 | * @to_size: length of to buffer |
526 | * @seed: optional seed |
527 | * Return: csum result or negative error code |
528 | * |
529 | * int bpf_skb_get_tunnel_opt(skb, opt, size) |
530 | * retrieve tunnel options metadata |
531 | * @skb: pointer to skb |
532 | * @opt: pointer to raw tunnel option data |
533 | * @size: size of @opt |
534 | * Return: option size |
535 | * |
536 | * int bpf_skb_set_tunnel_opt(skb, opt, size) |
537 | * populate tunnel options metadata |
538 | * @skb: pointer to skb |
539 | * @opt: pointer to raw tunnel option data |
540 | * @size: size of @opt |
541 | * Return: 0 on success or negative error |
542 | * |
543 | * int bpf_skb_change_proto(skb, proto, flags) |
544 | * Change protocol of the skb. Currently supported is v4 -> v6, |
545 | * v6 -> v4 transitions. The helper will also resize the skb. eBPF |
546 | * program is expected to fill the new headers via skb_store_bytes |
547 | * and lX_csum_replace. |
548 | * @skb: pointer to skb |
549 | * @proto: new skb->protocol type |
550 | * @flags: reserved |
551 | * Return: 0 on success or negative error |
552 | * |
553 | * int bpf_skb_change_type(skb, type) |
554 | * Change packet type of skb. |
555 | * @skb: pointer to skb |
556 | * @type: new skb->pkt_type type |
557 | * Return: 0 on success or negative error |
558 | * |
559 | * int bpf_skb_under_cgroup(skb, map, index) |
560 | * Check cgroup2 membership of skb |
561 | * @skb: pointer to skb |
562 | * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type |
563 | * @index: index of the cgroup in the bpf_map |
564 | * Return: |
565 | * == 0 skb failed the cgroup2 descendant test |
566 | * == 1 skb succeeded the cgroup2 descendant test |
567 | * < 0 error |
568 | * |
569 | * u32 bpf_get_hash_recalc(skb) |
570 | * Retrieve and possibly recalculate skb->hash. |
571 | * @skb: pointer to skb |
572 | * Return: hash |
573 | * |
574 | * u64 bpf_get_current_task(void) |
575 | * Returns current task_struct |
576 | * Return: current |
577 | * |
578 | * int bpf_probe_write_user(void *dst, void *src, int len) |
579 | * safely attempt to write to a location |
580 | * @dst: destination address in userspace |
581 | * @src: source address on stack |
582 | * @len: number of bytes to copy |
583 | * Return: 0 on success or negative error |
584 | * |
585 | * int bpf_current_task_under_cgroup(map, index) |
586 | * Check cgroup2 membership of current task |
587 | * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type |
588 | * @index: index of the cgroup in the bpf_map |
589 | * Return: |
590 | * == 0 current failed the cgroup2 descendant test |
591 | * == 1 current succeeded the cgroup2 descendant test |
592 | * < 0 error |
593 | * |
594 | * int bpf_skb_change_tail(skb, len, flags) |
595 | * The helper will resize the skb to the given new size, to be used f.e. |
596 | * with control messages. |
597 | * @skb: pointer to skb |
598 | * @len: new skb length |
599 | * @flags: reserved |
600 | * Return: 0 on success or negative error |
601 | * |
602 | * int bpf_skb_pull_data(skb, len) |
603 | * The helper will pull in non-linear data in case the skb is non-linear |
604 | * and not all of len are part of the linear section. Only needed for |
605 | * read/write with direct packet access. |
606 | * @skb: pointer to skb |
607 | * @len: len to make read/writeable |
608 | * Return: 0 on success or negative error |
609 | * |
610 | * s64 bpf_csum_update(skb, csum) |
611 | * Adds csum into skb->csum in case of CHECKSUM_COMPLETE. |
612 | * @skb: pointer to skb |
613 | * @csum: csum to add |
614 | * Return: csum on success or negative error |
615 | * |
616 | * void bpf_set_hash_invalid(skb) |
617 | * Invalidate current skb->hash. |
618 | * @skb: pointer to skb |
619 | * |
620 | * int bpf_get_numa_node_id() |
621 | * Return: Id of current NUMA node. |
622 | * |
623 | * int bpf_skb_change_head() |
624 | * Grows headroom of skb and adjusts MAC header offset accordingly. |
625 | * Will extends/reallocae as required automatically. |
626 | * May change skb data pointer and will thus invalidate any check |
627 | * performed for direct packet access. |
628 | * @skb: pointer to skb |
629 | * @len: length of header to be pushed in front |
630 | * @flags: Flags (unused for now) |
631 | * Return: 0 on success or negative error |
632 | * |
633 | * int bpf_xdp_adjust_head(xdp_md, delta) |
634 | * Adjust the xdp_md.data by delta |
635 | * @xdp_md: pointer to xdp_md |
636 | * @delta: An positive/negative integer to be added to xdp_md.data |
637 | * Return: 0 on success or negative on error |
638 | * |
639 | * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr) |
640 | * Copy a NUL terminated string from unsafe address. In case the string |
641 | * length is smaller than size, the target is not padded with further NUL |
642 | * bytes. In case the string length is larger than size, just count-1 |
643 | * bytes are copied and the last byte is set to NUL. |
644 | * @dst: destination address |
645 | * @size: maximum number of bytes to copy, including the trailing NUL |
646 | * @unsafe_ptr: unsafe address |
647 | * Return: |
648 | * > 0 length of the string including the trailing NUL on success |
649 | * < 0 error |
650 | * |
651 | * u64 bpf_get_socket_cookie(skb) |
652 | * Get the cookie for the socket stored inside sk_buff. |
653 | * @skb: pointer to skb |
654 | * Return: 8 Bytes non-decreasing number on success or 0 if the socket |
655 | * field is missing inside sk_buff |
656 | * |
657 | * u32 bpf_get_socket_uid(skb) |
658 | * Get the owner uid of the socket stored inside sk_buff. |
659 | * @skb: pointer to skb |
660 | * Return: uid of the socket owner on success or overflowuid if failed. |
661 | * |
662 | * u32 bpf_set_hash(skb, hash) |
663 | * Set full skb->hash. |
664 | * @skb: pointer to skb |
665 | * @hash: hash to set |
666 | * |
667 | * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen) |
668 | * Calls setsockopt. Not all opts are available, only those with |
669 | * integer optvals plus TCP_CONGESTION. |
670 | * Supported levels: SOL_SOCKET and IPPROTO_TCP |
671 | * @bpf_socket: pointer to bpf_socket |
672 | * @level: SOL_SOCKET or IPPROTO_TCP |
673 | * @optname: option name |
674 | * @optval: pointer to option value |
675 | * @optlen: length of optval in bytes |
676 | * Return: 0 or negative error |
677 | * |
678 | * int bpf_getsockopt(bpf_socket, level, optname, optval, optlen) |
679 | * Calls getsockopt. Not all opts are available. |
680 | * Supported levels: IPPROTO_TCP |
681 | * @bpf_socket: pointer to bpf_socket |
682 | * @level: IPPROTO_TCP |
683 | * @optname: option name |
684 | * @optval: pointer to option value |
685 | * @optlen: length of optval in bytes |
686 | * Return: 0 or negative error |
687 | * |
688 | * int bpf_sock_ops_cb_flags_set(bpf_sock_ops, flags) |
689 | * Set callback flags for sock_ops |
690 | * @bpf_sock_ops: pointer to bpf_sock_ops_kern struct |
691 | * @flags: flags value |
692 | * Return: 0 for no error |
693 | * -EINVAL if there is no full tcp socket |
694 | * bits in flags that are not supported by current kernel |
695 | * |
696 | * int bpf_skb_adjust_room(skb, len_diff, mode, flags) |
697 | * Grow or shrink room in sk_buff. |
698 | * @skb: pointer to skb |
699 | * @len_diff: (signed) amount of room to grow/shrink |
700 | * @mode: operation mode (enum bpf_adj_room_mode) |
701 | * @flags: reserved for future use |
702 | * Return: 0 on success or negative error code |
703 | * |
704 | * int bpf_sk_redirect_map(map, key, flags) |
705 | * Redirect skb to a sock in map using key as a lookup key for the |
706 | * sock in map. |
707 | * @map: pointer to sockmap |
708 | * @key: key to lookup sock in map |
709 | * @flags: reserved for future use |
710 | * Return: SK_PASS |
711 | * |
712 | * int bpf_sock_map_update(skops, map, key, flags) |
713 | * @skops: pointer to bpf_sock_ops |
714 | * @map: pointer to sockmap to update |
715 | * @key: key to insert/update sock in map |
716 | * @flags: same flags as map update elem |
717 | * |
718 | * int bpf_xdp_adjust_meta(xdp_md, delta) |
719 | * Adjust the xdp_md.data_meta by delta |
720 | * @xdp_md: pointer to xdp_md |
721 | * @delta: An positive/negative integer to be added to xdp_md.data_meta |
722 | * Return: 0 on success or negative on error |
723 | * |
724 | * int bpf_perf_event_read_value(map, flags, buf, buf_size) |
725 | * read perf event counter value and perf event enabled/running time |
726 | * @map: pointer to perf_event_array map |
727 | * @flags: index of event in the map or bitmask flags |
728 | * @buf: buf to fill |
729 | * @buf_size: size of the buf |
730 | * Return: 0 on success or negative error code |
731 | * |
732 | * int bpf_perf_prog_read_value(ctx, buf, buf_size) |
733 | * read perf prog attached perf event counter and enabled/running time |
734 | * @ctx: pointer to ctx |
735 | * @buf: buf to fill |
736 | * @buf_size: size of the buf |
737 | * Return : 0 on success or negative error code |
738 | * |
739 | * int bpf_override_return(pt_regs, rc) |
740 | * @pt_regs: pointer to struct pt_regs |
741 | * @rc: the return value to set |
742 | * |
743 | * int bpf_msg_redirect_map(map, key, flags) |
744 | * Redirect msg to a sock in map using key as a lookup key for the |
745 | * sock in map. |
746 | * @map: pointer to sockmap |
747 | * @key: key to lookup sock in map |
748 | * @flags: reserved for future use |
749 | * Return: SK_PASS |
750 | * |
751 | * int bpf_bind(ctx, addr, addr_len) |
752 | * Bind socket to address. Only binding to IP is supported, no port can be |
753 | * set in addr. |
754 | * @ctx: pointer to context of type bpf_sock_addr |
755 | * @addr: pointer to struct sockaddr to bind socket to |
756 | * @addr_len: length of sockaddr structure |
757 | * Return: 0 on success or negative error code |
758 | */ |
759 | #define __BPF_FUNC_MAPPER(FN) \ |
760 | FN(unspec), \ |
761 | FN(map_lookup_elem), \ |
762 | FN(map_update_elem), \ |
763 | FN(map_delete_elem), \ |
764 | FN(probe_read), \ |
765 | FN(ktime_get_ns), \ |
766 | FN(trace_printk), \ |
767 | FN(get_prandom_u32), \ |
768 | FN(get_smp_processor_id), \ |
769 | FN(skb_store_bytes), \ |
770 | FN(l3_csum_replace), \ |
771 | FN(l4_csum_replace), \ |
772 | FN(tail_call), \ |
773 | FN(clone_redirect), \ |
774 | FN(get_current_pid_tgid), \ |
775 | FN(get_current_uid_gid), \ |
776 | FN(get_current_comm), \ |
777 | FN(get_cgroup_classid), \ |
778 | FN(skb_vlan_push), \ |
779 | FN(skb_vlan_pop), \ |
780 | FN(skb_get_tunnel_key), \ |
781 | FN(skb_set_tunnel_key), \ |
782 | FN(perf_event_read), \ |
783 | FN(redirect), \ |
784 | FN(get_route_realm), \ |
785 | FN(perf_event_output), \ |
786 | FN(skb_load_bytes), \ |
787 | FN(get_stackid), \ |
788 | FN(csum_diff), \ |
789 | FN(skb_get_tunnel_opt), \ |
790 | FN(skb_set_tunnel_opt), \ |
791 | FN(skb_change_proto), \ |
792 | FN(skb_change_type), \ |
793 | FN(skb_under_cgroup), \ |
794 | FN(get_hash_recalc), \ |
795 | FN(get_current_task), \ |
796 | FN(probe_write_user), \ |
797 | FN(current_task_under_cgroup), \ |
798 | FN(skb_change_tail), \ |
799 | FN(skb_pull_data), \ |
800 | FN(csum_update), \ |
801 | FN(set_hash_invalid), \ |
802 | FN(get_numa_node_id), \ |
803 | FN(skb_change_head), \ |
804 | FN(xdp_adjust_head), \ |
805 | FN(probe_read_str), \ |
806 | FN(get_socket_cookie), \ |
807 | FN(get_socket_uid), \ |
808 | FN(set_hash), \ |
809 | FN(setsockopt), \ |
810 | FN(skb_adjust_room), \ |
811 | FN(redirect_map), \ |
812 | FN(sk_redirect_map), \ |
813 | FN(sock_map_update), \ |
814 | FN(xdp_adjust_meta), \ |
815 | FN(perf_event_read_value), \ |
816 | FN(perf_prog_read_value), \ |
817 | FN(getsockopt), \ |
818 | FN(override_return), \ |
819 | FN(sock_ops_cb_flags_set), \ |
820 | FN(msg_redirect_map), \ |
821 | FN(msg_apply_bytes), \ |
822 | FN(msg_cork_bytes), \ |
823 | FN(msg_pull_data), \ |
824 | FN(bind), |
825 | |
826 | /* integer value in 'imm' field of BPF_CALL instruction selects which helper |
827 | * function eBPF program intends to call |
828 | */ |
829 | #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x |
830 | enum bpf_func_id { |
831 | __BPF_FUNC_MAPPER(__BPF_ENUM_FN) |
832 | __BPF_FUNC_MAX_ID, |
833 | }; |
834 | #undef __BPF_ENUM_FN |
835 | |
836 | /* All flags used by eBPF helper functions, placed here. */ |
837 | |
838 | /* BPF_FUNC_skb_store_bytes flags. */ |
839 | #define BPF_F_RECOMPUTE_CSUM (1ULL << 0) |
840 | #define BPF_F_INVALIDATE_HASH (1ULL << 1) |
841 | |
842 | /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags. |
843 | * First 4 bits are for passing the header field size. |
844 | */ |
845 | #define BPF_F_HDR_FIELD_MASK 0xfULL |
846 | |
847 | /* BPF_FUNC_l4_csum_replace flags. */ |
848 | #define BPF_F_PSEUDO_HDR (1ULL << 4) |
849 | #define BPF_F_MARK_MANGLED_0 (1ULL << 5) |
850 | #define BPF_F_MARK_ENFORCE (1ULL << 6) |
851 | |
852 | /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */ |
853 | #define BPF_F_INGRESS (1ULL << 0) |
854 | |
855 | /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */ |
856 | #define BPF_F_TUNINFO_IPV6 (1ULL << 0) |
857 | |
858 | /* BPF_FUNC_get_stackid flags. */ |
859 | #define BPF_F_SKIP_FIELD_MASK 0xffULL |
860 | #define BPF_F_USER_STACK (1ULL << 8) |
861 | #define BPF_F_FAST_STACK_CMP (1ULL << 9) |
862 | #define BPF_F_REUSE_STACKID (1ULL << 10) |
863 | |
864 | /* BPF_FUNC_skb_set_tunnel_key flags. */ |
865 | #define BPF_F_ZERO_CSUM_TX (1ULL << 1) |
866 | #define BPF_F_DONT_FRAGMENT (1ULL << 2) |
867 | #define BPF_F_SEQ_NUMBER (1ULL << 3) |
868 | |
869 | /* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and |
870 | * BPF_FUNC_perf_event_read_value flags. |
871 | */ |
872 | #define BPF_F_INDEX_MASK 0xffffffffULL |
873 | #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK |
874 | /* BPF_FUNC_perf_event_output for sk_buff input context. */ |
875 | #define BPF_F_CTXLEN_MASK (0xfffffULL << 32) |
876 | |
877 | /* Mode for BPF_FUNC_skb_adjust_room helper. */ |
878 | enum bpf_adj_room_mode { |
879 | BPF_ADJ_ROOM_NET, |
880 | }; |
881 | |
882 | /* user accessible mirror of in-kernel sk_buff. |
883 | * new fields can only be added to the end of this structure |
884 | */ |
885 | struct __sk_buff { |
886 | __u32 len; |
887 | __u32 pkt_type; |
888 | __u32 mark; |
889 | __u32 queue_mapping; |
890 | __u32 protocol; |
891 | __u32 vlan_present; |
892 | __u32 vlan_tci; |
893 | __u32 vlan_proto; |
894 | __u32 priority; |
895 | __u32 ingress_ifindex; |
896 | __u32 ifindex; |
897 | __u32 tc_index; |
898 | __u32 cb[5]; |
899 | __u32 hash; |
900 | __u32 tc_classid; |
901 | __u32 data; |
902 | __u32 data_end; |
903 | __u32 napi_id; |
904 | |
905 | /* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */ |
906 | __u32 family; |
907 | __u32 remote_ip4; /* Stored in network byte order */ |
908 | __u32 local_ip4; /* Stored in network byte order */ |
909 | __u32 remote_ip6[4]; /* Stored in network byte order */ |
910 | __u32 local_ip6[4]; /* Stored in network byte order */ |
911 | __u32 remote_port; /* Stored in network byte order */ |
912 | __u32 local_port; /* stored in host byte order */ |
913 | /* ... here. */ |
914 | |
915 | __u32 data_meta; |
916 | }; |
917 | |
918 | struct bpf_tunnel_key { |
919 | __u32 tunnel_id; |
920 | union { |
921 | __u32 remote_ipv4; |
922 | __u32 remote_ipv6[4]; |
923 | }; |
924 | __u8 tunnel_tos; |
925 | __u8 tunnel_ttl; |
926 | __u16 tunnel_ext; |
927 | __u32 tunnel_label; |
928 | }; |
929 | |
930 | /* Generic BPF return codes which all BPF program types may support. |
931 | * The values are binary compatible with their TC_ACT_* counter-part to |
932 | * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT |
933 | * programs. |
934 | * |
935 | * XDP is handled seprately, see XDP_*. |
936 | */ |
937 | enum bpf_ret_code { |
938 | BPF_OK = 0, |
939 | /* 1 reserved */ |
940 | BPF_DROP = 2, |
941 | /* 3-6 reserved */ |
942 | BPF_REDIRECT = 7, |
943 | /* >127 are reserved for prog type specific return codes */ |
944 | }; |
945 | |
946 | struct bpf_sock { |
947 | __u32 bound_dev_if; |
948 | __u32 family; |
949 | __u32 type; |
950 | __u32 protocol; |
951 | __u32 mark; |
952 | __u32 priority; |
953 | __u32 src_ip4; /* Allows 1,2,4-byte read. |
954 | * Stored in network byte order. |
955 | */ |
956 | __u32 src_ip6[4]; /* Allows 1,2,4-byte read. |
957 | * Stored in network byte order. |
958 | */ |
959 | __u32 src_port; /* Allows 4-byte read. |
960 | * Stored in host byte order |
961 | */ |
962 | }; |
963 | |
964 | #define XDP_PACKET_HEADROOM 256 |
965 | |
966 | /* User return codes for XDP prog type. |
967 | * A valid XDP program must return one of these defined values. All other |
968 | * return codes are reserved for future use. Unknown return codes will |
969 | * result in packet drops and a warning via bpf_warn_invalid_xdp_action(). |
970 | */ |
971 | enum xdp_action { |
972 | XDP_ABORTED = 0, |
973 | XDP_DROP, |
974 | XDP_PASS, |
975 | XDP_TX, |
976 | XDP_REDIRECT, |
977 | }; |
978 | |
979 | /* user accessible metadata for XDP packet hook |
980 | * new fields must be added to the end of this structure |
981 | */ |
982 | struct xdp_md { |
983 | __u32 data; |
984 | __u32 data_end; |
985 | __u32 data_meta; |
986 | /* Below access go through struct xdp_rxq_info */ |
987 | __u32 ingress_ifindex; /* rxq->dev->ifindex */ |
988 | __u32 rx_queue_index; /* rxq->queue_index */ |
989 | }; |
990 | |
991 | enum sk_action { |
992 | SK_DROP = 0, |
993 | SK_PASS, |
994 | }; |
995 | |
996 | /* user accessible metadata for SK_MSG packet hook, new fields must |
997 | * be added to the end of this structure |
998 | */ |
999 | struct sk_msg_md { |
1000 | void *data; |
1001 | void *data_end; |
1002 | }; |
1003 | |
1004 | #define BPF_TAG_SIZE 8 |
1005 | |
1006 | struct bpf_prog_info { |
1007 | __u32 type; |
1008 | __u32 id; |
1009 | __u8 tag[BPF_TAG_SIZE]; |
1010 | __u32 jited_prog_len; |
1011 | __u32 xlated_prog_len; |
1012 | __aligned_u64 jited_prog_insns; |
1013 | __aligned_u64 xlated_prog_insns; |
1014 | __u64 load_time; /* ns since boottime */ |
1015 | __u32 created_by_uid; |
1016 | __u32 nr_map_ids; |
1017 | __aligned_u64 map_ids; |
1018 | char name[BPF_OBJ_NAME_LEN]; |
1019 | __u32 ifindex; |
1020 | __u32 :32; |
1021 | __u64 netns_dev; |
1022 | __u64 netns_ino; |
1023 | } __attribute__((aligned(8))); |
1024 | |
1025 | struct bpf_map_info { |
1026 | __u32 type; |
1027 | __u32 id; |
1028 | __u32 key_size; |
1029 | __u32 value_size; |
1030 | __u32 max_entries; |
1031 | __u32 map_flags; |
1032 | char name[BPF_OBJ_NAME_LEN]; |
1033 | __u32 ifindex; |
1034 | __u32 :32; |
1035 | __u64 netns_dev; |
1036 | __u64 netns_ino; |
1037 | } __attribute__((aligned(8))); |
1038 | |
1039 | /* User bpf_sock_addr struct to access socket fields and sockaddr struct passed |
1040 | * by user and intended to be used by socket (e.g. to bind to, depends on |
1041 | * attach attach type). |
1042 | */ |
1043 | struct bpf_sock_addr { |
1044 | __u32 user_family; /* Allows 4-byte read, but no write. */ |
1045 | __u32 user_ip4; /* Allows 1,2,4-byte read and 4-byte write. |
1046 | * Stored in network byte order. |
1047 | */ |
1048 | __u32 user_ip6[4]; /* Allows 1,2,4-byte read an 4-byte write. |
1049 | * Stored in network byte order. |
1050 | */ |
1051 | __u32 user_port; /* Allows 4-byte read and write. |
1052 | * Stored in network byte order |
1053 | */ |
1054 | __u32 family; /* Allows 4-byte read, but no write */ |
1055 | __u32 type; /* Allows 4-byte read, but no write */ |
1056 | __u32 protocol; /* Allows 4-byte read, but no write */ |
1057 | }; |
1058 | |
1059 | /* User bpf_sock_ops struct to access socket values and specify request ops |
1060 | * and their replies. |
1061 | * Some of this fields are in network (bigendian) byte order and may need |
1062 | * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h). |
1063 | * New fields can only be added at the end of this structure |
1064 | */ |
1065 | struct bpf_sock_ops { |
1066 | __u32 op; |
1067 | union { |
1068 | __u32 args[4]; /* Optionally passed to bpf program */ |
1069 | __u32 reply; /* Returned by bpf program */ |
1070 | __u32 replylong[4]; /* Optionally returned by bpf prog */ |
1071 | }; |
1072 | __u32 family; |
1073 | __u32 remote_ip4; /* Stored in network byte order */ |
1074 | __u32 local_ip4; /* Stored in network byte order */ |
1075 | __u32 remote_ip6[4]; /* Stored in network byte order */ |
1076 | __u32 local_ip6[4]; /* Stored in network byte order */ |
1077 | __u32 remote_port; /* Stored in network byte order */ |
1078 | __u32 local_port; /* stored in host byte order */ |
1079 | __u32 is_fullsock; /* Some TCP fields are only valid if |
1080 | * there is a full socket. If not, the |
1081 | * fields read as zero. |
1082 | */ |
1083 | __u32 snd_cwnd; |
1084 | __u32 srtt_us; /* Averaged RTT << 3 in usecs */ |
1085 | __u32 bpf_sock_ops_cb_flags; /* flags defined in uapi/linux/tcp.h */ |
1086 | __u32 state; |
1087 | __u32 rtt_min; |
1088 | __u32 snd_ssthresh; |
1089 | __u32 rcv_nxt; |
1090 | __u32 snd_nxt; |
1091 | __u32 snd_una; |
1092 | __u32 mss_cache; |
1093 | __u32 ecn_flags; |
1094 | __u32 rate_delivered; |
1095 | __u32 rate_interval_us; |
1096 | __u32 packets_out; |
1097 | __u32 retrans_out; |
1098 | __u32 total_retrans; |
1099 | __u32 segs_in; |
1100 | __u32 data_segs_in; |
1101 | __u32 segs_out; |
1102 | __u32 data_segs_out; |
1103 | __u32 lost_out; |
1104 | __u32 sacked_out; |
1105 | __u32 sk_txhash; |
1106 | __u64 bytes_received; |
1107 | __u64 bytes_acked; |
1108 | }; |
1109 | |
1110 | /* Definitions for bpf_sock_ops_cb_flags */ |
1111 | #define BPF_SOCK_OPS_RTO_CB_FLAG (1<<0) |
1112 | #define BPF_SOCK_OPS_RETRANS_CB_FLAG (1<<1) |
1113 | #define BPF_SOCK_OPS_STATE_CB_FLAG (1<<2) |
1114 | #define BPF_SOCK_OPS_ALL_CB_FLAGS 0x7 /* Mask of all currently |
1115 | * supported cb flags |
1116 | */ |
1117 | |
1118 | /* List of known BPF sock_ops operators. |
1119 | * New entries can only be added at the end |
1120 | */ |
1121 | enum { |
1122 | BPF_SOCK_OPS_VOID, |
1123 | BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or |
1124 | * -1 if default value should be used |
1125 | */ |
1126 | BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized |
1127 | * window (in packets) or -1 if default |
1128 | * value should be used |
1129 | */ |
1130 | BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an |
1131 | * active connection is initialized |
1132 | */ |
1133 | BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an |
1134 | * active connection is |
1135 | * established |
1136 | */ |
1137 | BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a |
1138 | * passive connection is |
1139 | * established |
1140 | */ |
1141 | BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control |
1142 | * needs ECN |
1143 | */ |
1144 | BPF_SOCK_OPS_BASE_RTT, /* Get base RTT. The correct value is |
1145 | * based on the path and may be |
1146 | * dependent on the congestion control |
1147 | * algorithm. In general it indicates |
1148 | * a congestion threshold. RTTs above |
1149 | * this indicate congestion |
1150 | */ |
1151 | BPF_SOCK_OPS_RTO_CB, /* Called when an RTO has triggered. |
1152 | * Arg1: value of icsk_retransmits |
1153 | * Arg2: value of icsk_rto |
1154 | * Arg3: whether RTO has expired |
1155 | */ |
1156 | BPF_SOCK_OPS_RETRANS_CB, /* Called when skb is retransmitted. |
1157 | * Arg1: sequence number of 1st byte |
1158 | * Arg2: # segments |
1159 | * Arg3: return value of |
1160 | * tcp_transmit_skb (0 => success) |
1161 | */ |
1162 | BPF_SOCK_OPS_STATE_CB, /* Called when TCP changes state. |
1163 | * Arg1: old_state |
1164 | * Arg2: new_state |
1165 | */ |
1166 | }; |
1167 | |
1168 | /* List of TCP states. There is a build check in net/ipv4/tcp.c to detect |
1169 | * changes between the TCP and BPF versions. Ideally this should never happen. |
1170 | * If it does, we need to add code to convert them before calling |
1171 | * the BPF sock_ops function. |
1172 | */ |
1173 | enum { |
1174 | BPF_TCP_ESTABLISHED = 1, |
1175 | BPF_TCP_SYN_SENT, |
1176 | BPF_TCP_SYN_RECV, |
1177 | BPF_TCP_FIN_WAIT1, |
1178 | BPF_TCP_FIN_WAIT2, |
1179 | BPF_TCP_TIME_WAIT, |
1180 | BPF_TCP_CLOSE, |
1181 | BPF_TCP_CLOSE_WAIT, |
1182 | BPF_TCP_LAST_ACK, |
1183 | BPF_TCP_LISTEN, |
1184 | BPF_TCP_CLOSING, /* Now a valid state */ |
1185 | BPF_TCP_NEW_SYN_RECV, |
1186 | |
1187 | BPF_TCP_MAX_STATES /* Leave at the end! */ |
1188 | }; |
1189 | |
1190 | #define TCP_BPF_IW 1001 /* Set TCP initial congestion window */ |
1191 | #define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */ |
1192 | |
1193 | struct bpf_perf_event_value { |
1194 | __u64 counter; |
1195 | __u64 enabled; |
1196 | __u64 running; |
1197 | }; |
1198 | |
1199 | #define BPF_DEVCG_ACC_MKNOD (1ULL << 0) |
1200 | #define BPF_DEVCG_ACC_READ (1ULL << 1) |
1201 | #define BPF_DEVCG_ACC_WRITE (1ULL << 2) |
1202 | |
1203 | #define BPF_DEVCG_DEV_BLOCK (1ULL << 0) |
1204 | #define BPF_DEVCG_DEV_CHAR (1ULL << 1) |
1205 | |
1206 | struct bpf_cgroup_dev_ctx { |
1207 | /* access_type encoded as (BPF_DEVCG_ACC_* << 16) | BPF_DEVCG_DEV_* */ |
1208 | __u32 access_type; |
1209 | __u32 major; |
1210 | __u32 minor; |
1211 | }; |
1212 | |
1213 | struct bpf_raw_tracepoint_args { |
1214 | __u64 args[0]; |
1215 | }; |
1216 | |
1217 | #endif /* __LINUX_BPF_H__ */ |
1218 |
Warning: That file was not part of the compilation database. It may have many parsing errors.