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ba914908 | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
b54ac87e DB |
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 */ | |
07ed8df6 | 20 | #define BPF_DW 0x18 /* double word (64-bit) */ |
b54ac87e DB |
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 | ||
3af3d358 | 34 | /* jmp encodings */ |
b54ac87e | 35 | #define BPF_JNE 0x50 /* jump != */ |
3af3d358 SH |
36 | #define BPF_JLT 0xa0 /* LT is unsigned, '<' */ |
37 | #define BPF_JLE 0xb0 /* LE is unsigned, '<=' */ | |
b54ac87e DB |
38 | #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ |
39 | #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ | |
3af3d358 SH |
40 | #define BPF_JSLT 0xc0 /* SLT is signed, '<' */ |
41 | #define BPF_JSLE 0xd0 /* SLE is signed, '<=' */ | |
b54ac87e DB |
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 | ||
b479a7d7 SH |
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 | ||
0198930b | 78 | /* BPF syscall commands, see bpf(2) man-page for details. */ |
b54ac87e | 79 | enum bpf_cmd { |
b54ac87e | 80 | BPF_MAP_CREATE, |
b54ac87e | 81 | BPF_MAP_LOOKUP_ELEM, |
b54ac87e | 82 | BPF_MAP_UPDATE_ELEM, |
b54ac87e | 83 | BPF_MAP_DELETE_ELEM, |
b54ac87e | 84 | BPF_MAP_GET_NEXT_KEY, |
b54ac87e | 85 | BPF_PROG_LOAD, |
0198930b SH |
86 | BPF_OBJ_PIN, |
87 | BPF_OBJ_GET, | |
1a97748b SH |
88 | BPF_PROG_ATTACH, |
89 | BPF_PROG_DETACH, | |
45f78b4d | 90 | BPF_PROG_TEST_RUN, |
410556ad SH |
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, | |
f53da99a | 96 | BPF_PROG_QUERY, |
b54ac87e DB |
97 | }; |
98 | ||
99 | enum bpf_map_type { | |
100 | BPF_MAP_TYPE_UNSPEC, | |
101 | BPF_MAP_TYPE_HASH, | |
102 | BPF_MAP_TYPE_ARRAY, | |
8f42ceaf | 103 | BPF_MAP_TYPE_PROG_ARRAY, |
4f3489cd | 104 | BPF_MAP_TYPE_PERF_EVENT_ARRAY, |
8593b2ca SH |
105 | BPF_MAP_TYPE_PERCPU_HASH, |
106 | BPF_MAP_TYPE_PERCPU_ARRAY, | |
2421ab75 | 107 | BPF_MAP_TYPE_STACK_TRACE, |
4824bb41 | 108 | BPF_MAP_TYPE_CGROUP_ARRAY, |
1a97748b SH |
109 | BPF_MAP_TYPE_LRU_HASH, |
110 | BPF_MAP_TYPE_LRU_PERCPU_HASH, | |
b479a7d7 | 111 | BPF_MAP_TYPE_LPM_TRIE, |
45f78b4d SH |
112 | BPF_MAP_TYPE_ARRAY_OF_MAPS, |
113 | BPF_MAP_TYPE_HASH_OF_MAPS, | |
f0b9b795 | 114 | BPF_MAP_TYPE_DEVMAP, |
18d7817c | 115 | BPF_MAP_TYPE_SOCKMAP, |
fa19d6bc | 116 | BPF_MAP_TYPE_CPUMAP, |
b54ac87e DB |
117 | }; |
118 | ||
119 | enum bpf_prog_type { | |
120 | BPF_PROG_TYPE_UNSPEC, | |
121 | BPF_PROG_TYPE_SOCKET_FILTER, | |
aeedd8e1 | 122 | BPF_PROG_TYPE_KPROBE, |
b54ac87e | 123 | BPF_PROG_TYPE_SCHED_CLS, |
cbdc3ed8 | 124 | BPF_PROG_TYPE_SCHED_ACT, |
bc9fb257 | 125 | BPF_PROG_TYPE_TRACEPOINT, |
ba91cd9d | 126 | BPF_PROG_TYPE_XDP, |
e8a67bc4 | 127 | BPF_PROG_TYPE_PERF_EVENT, |
1a97748b | 128 | BPF_PROG_TYPE_CGROUP_SKB, |
143a704b SH |
129 | BPF_PROG_TYPE_CGROUP_SOCK, |
130 | BPF_PROG_TYPE_LWT_IN, | |
131 | BPF_PROG_TYPE_LWT_OUT, | |
132 | BPF_PROG_TYPE_LWT_XMIT, | |
f0b9b795 | 133 | BPF_PROG_TYPE_SOCK_OPS, |
18d7817c | 134 | BPF_PROG_TYPE_SK_SKB, |
665ef5a5 | 135 | BPF_PROG_TYPE_CGROUP_DEVICE, |
b54ac87e DB |
136 | }; |
137 | ||
1a97748b SH |
138 | enum bpf_attach_type { |
139 | BPF_CGROUP_INET_INGRESS, | |
140 | BPF_CGROUP_INET_EGRESS, | |
143a704b | 141 | BPF_CGROUP_INET_SOCK_CREATE, |
f0b9b795 | 142 | BPF_CGROUP_SOCK_OPS, |
8707fd8c SH |
143 | BPF_SK_SKB_STREAM_PARSER, |
144 | BPF_SK_SKB_STREAM_VERDICT, | |
665ef5a5 | 145 | BPF_CGROUP_DEVICE, |
1a97748b SH |
146 | __MAX_BPF_ATTACH_TYPE |
147 | }; | |
148 | ||
149 | #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE | |
150 | ||
f53da99a SH |
151 | /* cgroup-bpf attach flags used in BPF_PROG_ATTACH command |
152 | * | |
153 | * NONE(default): No further bpf programs allowed in the subtree. | |
154 | * | |
155 | * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program, | |
156 | * the program in this cgroup yields to sub-cgroup program. | |
157 | * | |
158 | * BPF_F_ALLOW_MULTI: If a sub-cgroup installs some bpf program, | |
159 | * that cgroup program gets run in addition to the program in this cgroup. | |
160 | * | |
161 | * Only one program is allowed to be attached to a cgroup with | |
162 | * NONE or BPF_F_ALLOW_OVERRIDE flag. | |
163 | * Attaching another program on top of NONE or BPF_F_ALLOW_OVERRIDE will | |
164 | * release old program and attach the new one. Attach flags has to match. | |
165 | * | |
166 | * Multiple programs are allowed to be attached to a cgroup with | |
167 | * BPF_F_ALLOW_MULTI flag. They are executed in FIFO order | |
168 | * (those that were attached first, run first) | |
169 | * The programs of sub-cgroup are executed first, then programs of | |
170 | * this cgroup and then programs of parent cgroup. | |
171 | * When children program makes decision (like picking TCP CA or sock bind) | |
172 | * parent program has a chance to override it. | |
173 | * | |
174 | * A cgroup with MULTI or OVERRIDE flag allows any attach flags in sub-cgroups. | |
175 | * A cgroup with NONE doesn't allow any programs in sub-cgroups. | |
176 | * Ex1: | |
177 | * cgrp1 (MULTI progs A, B) -> | |
178 | * cgrp2 (OVERRIDE prog C) -> | |
179 | * cgrp3 (MULTI prog D) -> | |
180 | * cgrp4 (OVERRIDE prog E) -> | |
181 | * cgrp5 (NONE prog F) | |
182 | * the event in cgrp5 triggers execution of F,D,A,B in that order. | |
183 | * if prog F is detached, the execution is E,D,A,B | |
184 | * if prog F and D are detached, the execution is E,A,B | |
185 | * if prog F, E and D are detached, the execution is C,A,B | |
186 | * | |
187 | * All eligible programs are executed regardless of return code from | |
188 | * earlier programs. | |
cad54934 SH |
189 | */ |
190 | #define BPF_F_ALLOW_OVERRIDE (1U << 0) | |
f53da99a | 191 | #define BPF_F_ALLOW_MULTI (1U << 1) |
cad54934 | 192 | |
a2325adf SH |
193 | /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the |
194 | * verifier will perform strict alignment checking as if the kernel | |
195 | * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set, | |
196 | * and NET_IP_ALIGN defined to 2. | |
197 | */ | |
198 | #define BPF_F_STRICT_ALIGNMENT (1U << 0) | |
199 | ||
f82517f8 | 200 | /* when bpf_ldimm64->src_reg == BPF_PSEUDO_MAP_FD, bpf_ldimm64->imm == fd */ |
b54ac87e DB |
201 | #define BPF_PSEUDO_MAP_FD 1 |
202 | ||
f82517f8 DA |
203 | /* when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative |
204 | * offset to another bpf function | |
205 | */ | |
206 | #define BPF_PSEUDO_CALL 1 | |
207 | ||
b54ac87e DB |
208 | /* flags for BPF_MAP_UPDATE_ELEM command */ |
209 | #define BPF_ANY 0 /* create new element or update existing */ | |
210 | #define BPF_NOEXIST 1 /* create new element if it didn't exist */ | |
211 | #define BPF_EXIST 2 /* update existing element */ | |
212 | ||
18d7817c | 213 | /* flags for BPF_MAP_CREATE command */ |
b7e0091a | 214 | #define BPF_F_NO_PREALLOC (1U << 0) |
1a97748b SH |
215 | /* Instead of having one common LRU list in the |
216 | * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list | |
217 | * which can scale and perform better. | |
218 | * Note, the LRU nodes (including free nodes) cannot be moved | |
219 | * across different LRU lists. | |
220 | */ | |
221 | #define BPF_F_NO_COMMON_LRU (1U << 1) | |
18d7817c SH |
222 | /* Specify numa node during map creation */ |
223 | #define BPF_F_NUMA_NODE (1U << 2) | |
b7e0091a | 224 | |
f53da99a SH |
225 | /* flags for BPF_PROG_QUERY */ |
226 | #define BPF_F_QUERY_EFFECTIVE (1U << 0) | |
227 | ||
1db903de SH |
228 | #define BPF_OBJ_NAME_LEN 16U |
229 | ||
fa19d6bc SH |
230 | /* Flags for accessing BPF object */ |
231 | #define BPF_F_RDONLY (1U << 3) | |
232 | #define BPF_F_WRONLY (1U << 4) | |
233 | ||
b54ac87e DB |
234 | union bpf_attr { |
235 | struct { /* anonymous struct used by BPF_MAP_CREATE command */ | |
236 | __u32 map_type; /* one of enum bpf_map_type */ | |
237 | __u32 key_size; /* size of key in bytes */ | |
238 | __u32 value_size; /* size of value in bytes */ | |
239 | __u32 max_entries; /* max number of entries in a map */ | |
18d7817c SH |
240 | __u32 map_flags; /* BPF_MAP_CREATE related |
241 | * flags defined above. | |
242 | */ | |
45f78b4d | 243 | __u32 inner_map_fd; /* fd pointing to the inner map */ |
18d7817c SH |
244 | __u32 numa_node; /* numa node (effective only if |
245 | * BPF_F_NUMA_NODE is set). | |
246 | */ | |
f53da99a | 247 | char map_name[BPF_OBJ_NAME_LEN]; |
c0788a09 | 248 | __u32 map_ifindex; /* ifindex of netdev to create on */ |
b54ac87e DB |
249 | }; |
250 | ||
251 | struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */ | |
252 | __u32 map_fd; | |
253 | __aligned_u64 key; | |
254 | union { | |
255 | __aligned_u64 value; | |
256 | __aligned_u64 next_key; | |
257 | }; | |
258 | __u64 flags; | |
259 | }; | |
260 | ||
261 | struct { /* anonymous struct used by BPF_PROG_LOAD command */ | |
262 | __u32 prog_type; /* one of enum bpf_prog_type */ | |
263 | __u32 insn_cnt; | |
264 | __aligned_u64 insns; | |
265 | __aligned_u64 license; | |
266 | __u32 log_level; /* verbosity level of verifier */ | |
267 | __u32 log_size; /* size of user buffer */ | |
268 | __aligned_u64 log_buf; /* user supplied buffer */ | |
aeedd8e1 | 269 | __u32 kern_version; /* checked when prog_type=kprobe */ |
a2325adf | 270 | __u32 prog_flags; |
f53da99a | 271 | char prog_name[BPF_OBJ_NAME_LEN]; |
b38778bb | 272 | __u32 prog_ifindex; /* ifindex of netdev to prep for */ |
b54ac87e | 273 | }; |
0198930b SH |
274 | |
275 | struct { /* anonymous struct used by BPF_OBJ_* commands */ | |
276 | __aligned_u64 pathname; | |
277 | __u32 bpf_fd; | |
fa19d6bc | 278 | __u32 file_flags; |
0198930b | 279 | }; |
1a97748b SH |
280 | |
281 | struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */ | |
282 | __u32 target_fd; /* container object to attach to */ | |
283 | __u32 attach_bpf_fd; /* eBPF program to attach */ | |
284 | __u32 attach_type; | |
cad54934 | 285 | __u32 attach_flags; |
1a97748b | 286 | }; |
45f78b4d SH |
287 | |
288 | struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */ | |
289 | __u32 prog_fd; | |
290 | __u32 retval; | |
291 | __u32 data_size_in; | |
292 | __u32 data_size_out; | |
293 | __aligned_u64 data_in; | |
294 | __aligned_u64 data_out; | |
295 | __u32 repeat; | |
296 | __u32 duration; | |
297 | } test; | |
410556ad SH |
298 | |
299 | struct { /* anonymous struct used by BPF_*_GET_*_ID */ | |
300 | union { | |
301 | __u32 start_id; | |
302 | __u32 prog_id; | |
303 | __u32 map_id; | |
304 | }; | |
305 | __u32 next_id; | |
fa19d6bc | 306 | __u32 open_flags; |
410556ad SH |
307 | }; |
308 | ||
309 | struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */ | |
310 | __u32 bpf_fd; | |
311 | __u32 info_len; | |
312 | __aligned_u64 info; | |
313 | } info; | |
f53da99a SH |
314 | |
315 | struct { /* anonymous struct used by BPF_PROG_QUERY command */ | |
316 | __u32 target_fd; /* container object to query */ | |
317 | __u32 attach_type; | |
318 | __u32 query_flags; | |
319 | __u32 attach_flags; | |
320 | __aligned_u64 prog_ids; | |
321 | __u32 prog_cnt; | |
322 | } query; | |
b54ac87e DB |
323 | } __attribute__((aligned(8))); |
324 | ||
1a97748b SH |
325 | /* BPF helper function descriptions: |
326 | * | |
327 | * void *bpf_map_lookup_elem(&map, &key) | |
328 | * Return: Map value or NULL | |
329 | * | |
330 | * int bpf_map_update_elem(&map, &key, &value, flags) | |
331 | * Return: 0 on success or negative error | |
332 | * | |
333 | * int bpf_map_delete_elem(&map, &key) | |
334 | * Return: 0 on success or negative error | |
335 | * | |
336 | * int bpf_probe_read(void *dst, int size, void *src) | |
337 | * Return: 0 on success or negative error | |
338 | * | |
339 | * u64 bpf_ktime_get_ns(void) | |
340 | * Return: current ktime | |
341 | * | |
342 | * int bpf_trace_printk(const char *fmt, int fmt_size, ...) | |
343 | * Return: length of buffer written or negative error | |
344 | * | |
345 | * u32 bpf_prandom_u32(void) | |
346 | * Return: random value | |
347 | * | |
348 | * u32 bpf_raw_smp_processor_id(void) | |
349 | * Return: SMP processor ID | |
350 | * | |
351 | * int bpf_skb_store_bytes(skb, offset, from, len, flags) | |
352 | * store bytes into packet | |
353 | * @skb: pointer to skb | |
354 | * @offset: offset within packet from skb->mac_header | |
355 | * @from: pointer where to copy bytes from | |
356 | * @len: number of bytes to store into packet | |
357 | * @flags: bit 0 - if true, recompute skb->csum | |
358 | * other bits - reserved | |
359 | * Return: 0 on success or negative error | |
360 | * | |
361 | * int bpf_l3_csum_replace(skb, offset, from, to, flags) | |
362 | * recompute IP checksum | |
363 | * @skb: pointer to skb | |
364 | * @offset: offset within packet where IP checksum is located | |
365 | * @from: old value of header field | |
366 | * @to: new value of header field | |
367 | * @flags: bits 0-3 - size of header field | |
368 | * other bits - reserved | |
369 | * Return: 0 on success or negative error | |
370 | * | |
371 | * int bpf_l4_csum_replace(skb, offset, from, to, flags) | |
372 | * recompute TCP/UDP checksum | |
373 | * @skb: pointer to skb | |
374 | * @offset: offset within packet where TCP/UDP checksum is located | |
375 | * @from: old value of header field | |
376 | * @to: new value of header field | |
377 | * @flags: bits 0-3 - size of header field | |
378 | * bit 4 - is pseudo header | |
379 | * other bits - reserved | |
380 | * Return: 0 on success or negative error | |
381 | * | |
382 | * int bpf_tail_call(ctx, prog_array_map, index) | |
383 | * jump into another BPF program | |
384 | * @ctx: context pointer passed to next program | |
385 | * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY | |
f53da99a | 386 | * @index: 32-bit index inside array that selects specific program to run |
1a97748b SH |
387 | * Return: 0 on success or negative error |
388 | * | |
389 | * int bpf_clone_redirect(skb, ifindex, flags) | |
390 | * redirect to another netdev | |
391 | * @skb: pointer to skb | |
392 | * @ifindex: ifindex of the net device | |
393 | * @flags: bit 0 - if set, redirect to ingress instead of egress | |
394 | * other bits - reserved | |
395 | * Return: 0 on success or negative error | |
396 | * | |
397 | * u64 bpf_get_current_pid_tgid(void) | |
398 | * Return: current->tgid << 32 | current->pid | |
399 | * | |
400 | * u64 bpf_get_current_uid_gid(void) | |
401 | * Return: current_gid << 32 | current_uid | |
402 | * | |
403 | * int bpf_get_current_comm(char *buf, int size_of_buf) | |
404 | * stores current->comm into buf | |
405 | * Return: 0 on success or negative error | |
406 | * | |
407 | * u32 bpf_get_cgroup_classid(skb) | |
408 | * retrieve a proc's classid | |
409 | * @skb: pointer to skb | |
410 | * Return: classid if != 0 | |
411 | * | |
412 | * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) | |
413 | * Return: 0 on success or negative error | |
414 | * | |
415 | * int bpf_skb_vlan_pop(skb) | |
416 | * Return: 0 on success or negative error | |
417 | * | |
418 | * int bpf_skb_get_tunnel_key(skb, key, size, flags) | |
419 | * int bpf_skb_set_tunnel_key(skb, key, size, flags) | |
420 | * retrieve or populate tunnel metadata | |
421 | * @skb: pointer to skb | |
422 | * @key: pointer to 'struct bpf_tunnel_key' | |
423 | * @size: size of 'struct bpf_tunnel_key' | |
424 | * @flags: room for future extensions | |
425 | * Return: 0 on success or negative error | |
426 | * | |
d9bcafb4 SH |
427 | * u64 bpf_perf_event_read(map, flags) |
428 | * read perf event counter value | |
429 | * @map: pointer to perf_event_array map | |
430 | * @flags: index of event in the map or bitmask flags | |
431 | * Return: value of perf event counter read or error code | |
1a97748b SH |
432 | * |
433 | * int bpf_redirect(ifindex, flags) | |
434 | * redirect to another netdev | |
435 | * @ifindex: ifindex of the net device | |
96421f92 SH |
436 | * @flags: |
437 | * cls_bpf: | |
438 | * bit 0 - if set, redirect to ingress instead of egress | |
439 | * other bits - reserved | |
440 | * xdp_bpf: | |
441 | * all bits - reserved | |
442 | * Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error | |
443 | * xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error | |
444 | * int bpf_redirect_map(map, key, flags) | |
f0b9b795 | 445 | * redirect to endpoint in map |
96421f92 | 446 | * @map: pointer to dev map |
f0b9b795 | 447 | * @key: index in map to lookup |
f0b9b795 | 448 | * @flags: -- |
96421f92 | 449 | * Return: XDP_REDIRECT on success or XDP_ABORT on error |
1a97748b SH |
450 | * |
451 | * u32 bpf_get_route_realm(skb) | |
452 | * retrieve a dst's tclassid | |
453 | * @skb: pointer to skb | |
454 | * Return: realm if != 0 | |
455 | * | |
d9bcafb4 | 456 | * int bpf_perf_event_output(ctx, map, flags, data, size) |
1a97748b SH |
457 | * output perf raw sample |
458 | * @ctx: struct pt_regs* | |
459 | * @map: pointer to perf_event_array map | |
d9bcafb4 | 460 | * @flags: index of event in the map or bitmask flags |
1a97748b SH |
461 | * @data: data on stack to be output as raw data |
462 | * @size: size of data | |
463 | * Return: 0 on success or negative error | |
464 | * | |
465 | * int bpf_get_stackid(ctx, map, flags) | |
466 | * walk user or kernel stack and return id | |
467 | * @ctx: struct pt_regs* | |
468 | * @map: pointer to stack_trace map | |
469 | * @flags: bits 0-7 - numer of stack frames to skip | |
470 | * bit 8 - collect user stack instead of kernel | |
471 | * bit 9 - compare stacks by hash only | |
472 | * bit 10 - if two different stacks hash into the same stackid | |
473 | * discard old | |
474 | * other bits - reserved | |
475 | * Return: >= 0 stackid on success or negative error | |
476 | * | |
477 | * s64 bpf_csum_diff(from, from_size, to, to_size, seed) | |
478 | * calculate csum diff | |
479 | * @from: raw from buffer | |
480 | * @from_size: length of from buffer | |
481 | * @to: raw to buffer | |
482 | * @to_size: length of to buffer | |
483 | * @seed: optional seed | |
484 | * Return: csum result or negative error code | |
485 | * | |
486 | * int bpf_skb_get_tunnel_opt(skb, opt, size) | |
487 | * retrieve tunnel options metadata | |
488 | * @skb: pointer to skb | |
489 | * @opt: pointer to raw tunnel option data | |
490 | * @size: size of @opt | |
491 | * Return: option size | |
492 | * | |
493 | * int bpf_skb_set_tunnel_opt(skb, opt, size) | |
494 | * populate tunnel options metadata | |
495 | * @skb: pointer to skb | |
496 | * @opt: pointer to raw tunnel option data | |
497 | * @size: size of @opt | |
498 | * Return: 0 on success or negative error | |
499 | * | |
500 | * int bpf_skb_change_proto(skb, proto, flags) | |
501 | * Change protocol of the skb. Currently supported is v4 -> v6, | |
502 | * v6 -> v4 transitions. The helper will also resize the skb. eBPF | |
503 | * program is expected to fill the new headers via skb_store_bytes | |
504 | * and lX_csum_replace. | |
505 | * @skb: pointer to skb | |
506 | * @proto: new skb->protocol type | |
507 | * @flags: reserved | |
508 | * Return: 0 on success or negative error | |
509 | * | |
510 | * int bpf_skb_change_type(skb, type) | |
511 | * Change packet type of skb. | |
512 | * @skb: pointer to skb | |
513 | * @type: new skb->pkt_type type | |
514 | * Return: 0 on success or negative error | |
515 | * | |
516 | * int bpf_skb_under_cgroup(skb, map, index) | |
517 | * Check cgroup2 membership of skb | |
518 | * @skb: pointer to skb | |
519 | * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type | |
520 | * @index: index of the cgroup in the bpf_map | |
521 | * Return: | |
522 | * == 0 skb failed the cgroup2 descendant test | |
523 | * == 1 skb succeeded the cgroup2 descendant test | |
524 | * < 0 error | |
525 | * | |
526 | * u32 bpf_get_hash_recalc(skb) | |
527 | * Retrieve and possibly recalculate skb->hash. | |
528 | * @skb: pointer to skb | |
529 | * Return: hash | |
530 | * | |
531 | * u64 bpf_get_current_task(void) | |
532 | * Returns current task_struct | |
533 | * Return: current | |
534 | * | |
535 | * int bpf_probe_write_user(void *dst, void *src, int len) | |
536 | * safely attempt to write to a location | |
537 | * @dst: destination address in userspace | |
538 | * @src: source address on stack | |
539 | * @len: number of bytes to copy | |
540 | * Return: 0 on success or negative error | |
541 | * | |
542 | * int bpf_current_task_under_cgroup(map, index) | |
543 | * Check cgroup2 membership of current task | |
544 | * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type | |
545 | * @index: index of the cgroup in the bpf_map | |
546 | * Return: | |
547 | * == 0 current failed the cgroup2 descendant test | |
548 | * == 1 current succeeded the cgroup2 descendant test | |
549 | * < 0 error | |
550 | * | |
551 | * int bpf_skb_change_tail(skb, len, flags) | |
552 | * The helper will resize the skb to the given new size, to be used f.e. | |
553 | * with control messages. | |
554 | * @skb: pointer to skb | |
555 | * @len: new skb length | |
556 | * @flags: reserved | |
557 | * Return: 0 on success or negative error | |
558 | * | |
559 | * int bpf_skb_pull_data(skb, len) | |
560 | * The helper will pull in non-linear data in case the skb is non-linear | |
561 | * and not all of len are part of the linear section. Only needed for | |
562 | * read/write with direct packet access. | |
563 | * @skb: pointer to skb | |
564 | * @len: len to make read/writeable | |
565 | * Return: 0 on success or negative error | |
566 | * | |
567 | * s64 bpf_csum_update(skb, csum) | |
568 | * Adds csum into skb->csum in case of CHECKSUM_COMPLETE. | |
569 | * @skb: pointer to skb | |
570 | * @csum: csum to add | |
571 | * Return: csum on success or negative error | |
572 | * | |
573 | * void bpf_set_hash_invalid(skb) | |
574 | * Invalidate current skb->hash. | |
575 | * @skb: pointer to skb | |
576 | * | |
577 | * int bpf_get_numa_node_id() | |
578 | * Return: Id of current NUMA node. | |
143a704b SH |
579 | * |
580 | * int bpf_skb_change_head() | |
581 | * Grows headroom of skb and adjusts MAC header offset accordingly. | |
582 | * Will extends/reallocae as required automatically. | |
583 | * May change skb data pointer and will thus invalidate any check | |
584 | * performed for direct packet access. | |
585 | * @skb: pointer to skb | |
586 | * @len: length of header to be pushed in front | |
587 | * @flags: Flags (unused for now) | |
588 | * Return: 0 on success or negative error | |
3dd0bb51 SH |
589 | * |
590 | * int bpf_xdp_adjust_head(xdp_md, delta) | |
591 | * Adjust the xdp_md.data by delta | |
592 | * @xdp_md: pointer to xdp_md | |
593 | * @delta: An positive/negative integer to be added to xdp_md.data | |
594 | * Return: 0 on success or negative on error | |
a044b36a SH |
595 | * |
596 | * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr) | |
597 | * Copy a NUL terminated string from unsafe address. In case the string | |
598 | * length is smaller than size, the target is not padded with further NUL | |
599 | * bytes. In case the string length is larger than size, just count-1 | |
600 | * bytes are copied and the last byte is set to NUL. | |
601 | * @dst: destination address | |
602 | * @size: maximum number of bytes to copy, including the trailing NUL | |
603 | * @unsafe_ptr: unsafe address | |
604 | * Return: | |
605 | * > 0 length of the string including the trailing NUL on success | |
606 | * < 0 error | |
45f78b4d | 607 | * |
2c6a0636 | 608 | * u64 bpf_get_socket_cookie(skb) |
45f78b4d SH |
609 | * Get the cookie for the socket stored inside sk_buff. |
610 | * @skb: pointer to skb | |
611 | * Return: 8 Bytes non-decreasing number on success or 0 if the socket | |
612 | * field is missing inside sk_buff | |
613 | * | |
614 | * u32 bpf_get_socket_uid(skb) | |
615 | * Get the owner uid of the socket stored inside sk_buff. | |
616 | * @skb: pointer to skb | |
7ff1fce5 | 617 | * Return: uid of the socket owner on success or overflowuid if failed. |
b68581d4 SH |
618 | * |
619 | * u32 bpf_set_hash(skb, hash) | |
620 | * Set full skb->hash. | |
621 | * @skb: pointer to skb | |
622 | * @hash: hash to set | |
f0b9b795 SH |
623 | * |
624 | * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen) | |
625 | * Calls setsockopt. Not all opts are available, only those with | |
626 | * integer optvals plus TCP_CONGESTION. | |
fa19d6bc | 627 | * Supported levels: SOL_SOCKET and IPPROTO_TCP |
f0b9b795 | 628 | * @bpf_socket: pointer to bpf_socket |
fa19d6bc | 629 | * @level: SOL_SOCKET or IPPROTO_TCP |
f0b9b795 SH |
630 | * @optname: option name |
631 | * @optval: pointer to option value | |
fa19d6bc SH |
632 | * @optlen: length of optval in bytes |
633 | * Return: 0 or negative error | |
634 | * | |
635 | * int bpf_getsockopt(bpf_socket, level, optname, optval, optlen) | |
636 | * Calls getsockopt. Not all opts are available. | |
637 | * Supported levels: IPPROTO_TCP | |
638 | * @bpf_socket: pointer to bpf_socket | |
639 | * @level: IPPROTO_TCP | |
640 | * @optname: option name | |
641 | * @optval: pointer to option value | |
642 | * @optlen: length of optval in bytes | |
f0b9b795 SH |
643 | * Return: 0 or negative error |
644 | * | |
07ed8df6 DA |
645 | * int bpf_sock_ops_cb_flags_set(bpf_sock_ops, flags) |
646 | * Set callback flags for sock_ops | |
647 | * @bpf_sock_ops: pointer to bpf_sock_ops_kern struct | |
648 | * @flags: flags value | |
649 | * Return: 0 for no error | |
650 | * -EINVAL if there is no full tcp socket | |
651 | * bits in flags that are not supported by current kernel | |
652 | * | |
f0b9b795 SH |
653 | * int bpf_skb_adjust_room(skb, len_diff, mode, flags) |
654 | * Grow or shrink room in sk_buff. | |
655 | * @skb: pointer to skb | |
656 | * @len_diff: (signed) amount of room to grow/shrink | |
657 | * @mode: operation mode (enum bpf_adj_room_mode) | |
658 | * @flags: reserved for future use | |
659 | * Return: 0 on success or negative error code | |
18d7817c SH |
660 | * |
661 | * int bpf_sk_redirect_map(map, key, flags) | |
662 | * Redirect skb to a sock in map using key as a lookup key for the | |
663 | * sock in map. | |
664 | * @map: pointer to sockmap | |
665 | * @key: key to lookup sock in map | |
666 | * @flags: reserved for future use | |
fe388b9e | 667 | * Return: SK_PASS |
18d7817c | 668 | * |
8707fd8c | 669 | * int bpf_sock_map_update(skops, map, key, flags) |
18d7817c SH |
670 | * @skops: pointer to bpf_sock_ops |
671 | * @map: pointer to sockmap to update | |
672 | * @key: key to insert/update sock in map | |
673 | * @flags: same flags as map update elem | |
1db903de SH |
674 | * |
675 | * int bpf_xdp_adjust_meta(xdp_md, delta) | |
676 | * Adjust the xdp_md.data_meta by delta | |
677 | * @xdp_md: pointer to xdp_md | |
678 | * @delta: An positive/negative integer to be added to xdp_md.data_meta | |
679 | * Return: 0 on success or negative on error | |
f53da99a SH |
680 | * |
681 | * int bpf_perf_event_read_value(map, flags, buf, buf_size) | |
682 | * read perf event counter value and perf event enabled/running time | |
683 | * @map: pointer to perf_event_array map | |
684 | * @flags: index of event in the map or bitmask flags | |
685 | * @buf: buf to fill | |
686 | * @buf_size: size of the buf | |
687 | * Return: 0 on success or negative error code | |
688 | * | |
689 | * int bpf_perf_prog_read_value(ctx, buf, buf_size) | |
690 | * read perf prog attached perf event counter and enabled/running time | |
691 | * @ctx: pointer to ctx | |
692 | * @buf: buf to fill | |
693 | * @buf_size: size of the buf | |
694 | * Return : 0 on success or negative error code | |
f82517f8 DA |
695 | * |
696 | * int bpf_override_return(pt_regs, rc) | |
697 | * @pt_regs: pointer to struct pt_regs | |
698 | * @rc: the return value to set | |
1a97748b SH |
699 | */ |
700 | #define __BPF_FUNC_MAPPER(FN) \ | |
701 | FN(unspec), \ | |
702 | FN(map_lookup_elem), \ | |
703 | FN(map_update_elem), \ | |
704 | FN(map_delete_elem), \ | |
705 | FN(probe_read), \ | |
706 | FN(ktime_get_ns), \ | |
707 | FN(trace_printk), \ | |
708 | FN(get_prandom_u32), \ | |
709 | FN(get_smp_processor_id), \ | |
710 | FN(skb_store_bytes), \ | |
711 | FN(l3_csum_replace), \ | |
712 | FN(l4_csum_replace), \ | |
713 | FN(tail_call), \ | |
714 | FN(clone_redirect), \ | |
715 | FN(get_current_pid_tgid), \ | |
716 | FN(get_current_uid_gid), \ | |
717 | FN(get_current_comm), \ | |
718 | FN(get_cgroup_classid), \ | |
719 | FN(skb_vlan_push), \ | |
720 | FN(skb_vlan_pop), \ | |
721 | FN(skb_get_tunnel_key), \ | |
722 | FN(skb_set_tunnel_key), \ | |
723 | FN(perf_event_read), \ | |
724 | FN(redirect), \ | |
725 | FN(get_route_realm), \ | |
726 | FN(perf_event_output), \ | |
727 | FN(skb_load_bytes), \ | |
728 | FN(get_stackid), \ | |
729 | FN(csum_diff), \ | |
730 | FN(skb_get_tunnel_opt), \ | |
731 | FN(skb_set_tunnel_opt), \ | |
732 | FN(skb_change_proto), \ | |
733 | FN(skb_change_type), \ | |
734 | FN(skb_under_cgroup), \ | |
735 | FN(get_hash_recalc), \ | |
736 | FN(get_current_task), \ | |
737 | FN(probe_write_user), \ | |
738 | FN(current_task_under_cgroup), \ | |
739 | FN(skb_change_tail), \ | |
740 | FN(skb_pull_data), \ | |
741 | FN(csum_update), \ | |
742 | FN(set_hash_invalid), \ | |
143a704b | 743 | FN(get_numa_node_id), \ |
3dd0bb51 | 744 | FN(skb_change_head), \ |
a044b36a | 745 | FN(xdp_adjust_head), \ |
45f78b4d SH |
746 | FN(probe_read_str), \ |
747 | FN(get_socket_cookie), \ | |
b68581d4 | 748 | FN(get_socket_uid), \ |
f0b9b795 SH |
749 | FN(set_hash), \ |
750 | FN(setsockopt), \ | |
751 | FN(skb_adjust_room), \ | |
18d7817c SH |
752 | FN(redirect_map), \ |
753 | FN(sk_redirect_map), \ | |
754 | FN(sock_map_update), \ | |
f53da99a SH |
755 | FN(xdp_adjust_meta), \ |
756 | FN(perf_event_read_value), \ | |
fa19d6bc | 757 | FN(perf_prog_read_value), \ |
f82517f8 | 758 | FN(getsockopt), \ |
07ed8df6 DA |
759 | FN(override_return), \ |
760 | FN(sock_ops_cb_flags_set), | |
1a97748b | 761 | |
b54ac87e DB |
762 | /* integer value in 'imm' field of BPF_CALL instruction selects which helper |
763 | * function eBPF program intends to call | |
764 | */ | |
1a97748b | 765 | #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x |
b54ac87e | 766 | enum bpf_func_id { |
1a97748b | 767 | __BPF_FUNC_MAPPER(__BPF_ENUM_FN) |
b54ac87e DB |
768 | __BPF_FUNC_MAX_ID, |
769 | }; | |
1a97748b | 770 | #undef __BPF_ENUM_FN |
b54ac87e | 771 | |
7321b7db SH |
772 | /* All flags used by eBPF helper functions, placed here. */ |
773 | ||
774 | /* BPF_FUNC_skb_store_bytes flags. */ | |
775 | #define BPF_F_RECOMPUTE_CSUM (1ULL << 0) | |
b7e0091a | 776 | #define BPF_F_INVALIDATE_HASH (1ULL << 1) |
7321b7db SH |
777 | |
778 | /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags. | |
779 | * First 4 bits are for passing the header field size. | |
780 | */ | |
781 | #define BPF_F_HDR_FIELD_MASK 0xfULL | |
782 | ||
783 | /* BPF_FUNC_l4_csum_replace flags. */ | |
784 | #define BPF_F_PSEUDO_HDR (1ULL << 4) | |
2421ab75 | 785 | #define BPF_F_MARK_MANGLED_0 (1ULL << 5) |
b479a7d7 | 786 | #define BPF_F_MARK_ENFORCE (1ULL << 6) |
7321b7db SH |
787 | |
788 | /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */ | |
789 | #define BPF_F_INGRESS (1ULL << 0) | |
790 | ||
791 | /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */ | |
792 | #define BPF_F_TUNINFO_IPV6 (1ULL << 0) | |
793 | ||
2421ab75 SH |
794 | /* BPF_FUNC_get_stackid flags. */ |
795 | #define BPF_F_SKIP_FIELD_MASK 0xffULL | |
796 | #define BPF_F_USER_STACK (1ULL << 8) | |
797 | #define BPF_F_FAST_STACK_CMP (1ULL << 9) | |
798 | #define BPF_F_REUSE_STACKID (1ULL << 10) | |
799 | ||
b7e0091a SH |
800 | /* BPF_FUNC_skb_set_tunnel_key flags. */ |
801 | #define BPF_F_ZERO_CSUM_TX (1ULL << 1) | |
802 | #define BPF_F_DONT_FRAGMENT (1ULL << 2) | |
803 | ||
f53da99a SH |
804 | /* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and |
805 | * BPF_FUNC_perf_event_read_value flags. | |
806 | */ | |
32c0b9b7 SH |
807 | #define BPF_F_INDEX_MASK 0xffffffffULL |
808 | #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK | |
ba91cd9d SH |
809 | /* BPF_FUNC_perf_event_output for sk_buff input context. */ |
810 | #define BPF_F_CTXLEN_MASK (0xfffffULL << 32) | |
32c0b9b7 | 811 | |
f0b9b795 SH |
812 | /* Mode for BPF_FUNC_skb_adjust_room helper. */ |
813 | enum bpf_adj_room_mode { | |
814 | BPF_ADJ_ROOM_NET, | |
815 | }; | |
816 | ||
b54ac87e DB |
817 | /* user accessible mirror of in-kernel sk_buff. |
818 | * new fields can only be added to the end of this structure | |
819 | */ | |
820 | struct __sk_buff { | |
821 | __u32 len; | |
822 | __u32 pkt_type; | |
823 | __u32 mark; | |
824 | __u32 queue_mapping; | |
cbdc3ed8 SH |
825 | __u32 protocol; |
826 | __u32 vlan_present; | |
827 | __u32 vlan_tci; | |
828 | __u32 vlan_proto; | |
e46efaed | 829 | __u32 priority; |
ff631c3a SH |
830 | __u32 ingress_ifindex; |
831 | __u32 ifindex; | |
832 | __u32 tc_index; | |
833 | __u32 cb[5]; | |
4f3489cd | 834 | __u32 hash; |
4e39bfb9 | 835 | __u32 tc_classid; |
31ce6e01 SH |
836 | __u32 data; |
837 | __u32 data_end; | |
5b0aa887 | 838 | __u32 napi_id; |
18d7817c | 839 | |
1db903de | 840 | /* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */ |
18d7817c SH |
841 | __u32 family; |
842 | __u32 remote_ip4; /* Stored in network byte order */ | |
843 | __u32 local_ip4; /* Stored in network byte order */ | |
844 | __u32 remote_ip6[4]; /* Stored in network byte order */ | |
845 | __u32 local_ip6[4]; /* Stored in network byte order */ | |
846 | __u32 remote_port; /* Stored in network byte order */ | |
847 | __u32 local_port; /* stored in host byte order */ | |
1db903de SH |
848 | /* ... here. */ |
849 | ||
850 | __u32 data_meta; | |
b54ac87e DB |
851 | }; |
852 | ||
089d93d6 SH |
853 | struct bpf_tunnel_key { |
854 | __u32 tunnel_id; | |
7321b7db SH |
855 | union { |
856 | __u32 remote_ipv4; | |
857 | __u32 remote_ipv6[4]; | |
858 | }; | |
859 | __u8 tunnel_tos; | |
860 | __u8 tunnel_ttl; | |
6268b08c | 861 | __u16 tunnel_ext; |
b7e0091a | 862 | __u32 tunnel_label; |
089d93d6 SH |
863 | }; |
864 | ||
143a704b SH |
865 | /* Generic BPF return codes which all BPF program types may support. |
866 | * The values are binary compatible with their TC_ACT_* counter-part to | |
867 | * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT | |
868 | * programs. | |
869 | * | |
870 | * XDP is handled seprately, see XDP_*. | |
871 | */ | |
872 | enum bpf_ret_code { | |
873 | BPF_OK = 0, | |
874 | /* 1 reserved */ | |
875 | BPF_DROP = 2, | |
876 | /* 3-6 reserved */ | |
877 | BPF_REDIRECT = 7, | |
878 | /* >127 are reserved for prog type specific return codes */ | |
879 | }; | |
880 | ||
881 | struct bpf_sock { | |
882 | __u32 bound_dev_if; | |
883 | __u32 family; | |
884 | __u32 type; | |
885 | __u32 protocol; | |
4a5b3035 SH |
886 | __u32 mark; |
887 | __u32 priority; | |
143a704b SH |
888 | }; |
889 | ||
3dd0bb51 SH |
890 | #define XDP_PACKET_HEADROOM 256 |
891 | ||
ba91cd9d SH |
892 | /* User return codes for XDP prog type. |
893 | * A valid XDP program must return one of these defined values. All other | |
44cf8415 SH |
894 | * return codes are reserved for future use. Unknown return codes will |
895 | * result in packet drops and a warning via bpf_warn_invalid_xdp_action(). | |
ba91cd9d SH |
896 | */ |
897 | enum xdp_action { | |
898 | XDP_ABORTED = 0, | |
899 | XDP_DROP, | |
900 | XDP_PASS, | |
901 | XDP_TX, | |
f0b9b795 | 902 | XDP_REDIRECT, |
ba91cd9d SH |
903 | }; |
904 | ||
905 | /* user accessible metadata for XDP packet hook | |
906 | * new fields must be added to the end of this structure | |
907 | */ | |
908 | struct xdp_md { | |
909 | __u32 data; | |
910 | __u32 data_end; | |
1db903de | 911 | __u32 data_meta; |
c0788a09 DA |
912 | /* Below access go through struct xdp_rxq_info */ |
913 | __u32 ingress_ifindex; /* rxq->dev->ifindex */ | |
914 | __u32 rx_queue_index; /* rxq->queue_index */ | |
ba91cd9d SH |
915 | }; |
916 | ||
18d7817c | 917 | enum sk_action { |
fe388b9e SH |
918 | SK_DROP = 0, |
919 | SK_PASS, | |
18d7817c SH |
920 | }; |
921 | ||
410556ad SH |
922 | #define BPF_TAG_SIZE 8 |
923 | ||
924 | struct bpf_prog_info { | |
925 | __u32 type; | |
926 | __u32 id; | |
927 | __u8 tag[BPF_TAG_SIZE]; | |
928 | __u32 jited_prog_len; | |
929 | __u32 xlated_prog_len; | |
930 | __aligned_u64 jited_prog_insns; | |
931 | __aligned_u64 xlated_prog_insns; | |
1db903de SH |
932 | __u64 load_time; /* ns since boottime */ |
933 | __u32 created_by_uid; | |
934 | __u32 nr_map_ids; | |
935 | __aligned_u64 map_ids; | |
f53da99a | 936 | char name[BPF_OBJ_NAME_LEN]; |
c0788a09 DA |
937 | __u32 ifindex; |
938 | __u64 netns_dev; | |
939 | __u64 netns_ino; | |
410556ad SH |
940 | } __attribute__((aligned(8))); |
941 | ||
942 | struct bpf_map_info { | |
943 | __u32 type; | |
944 | __u32 id; | |
945 | __u32 key_size; | |
946 | __u32 value_size; | |
947 | __u32 max_entries; | |
948 | __u32 map_flags; | |
f53da99a | 949 | char name[BPF_OBJ_NAME_LEN]; |
07ed8df6 DA |
950 | __u32 ifindex; |
951 | __u64 netns_dev; | |
952 | __u64 netns_ino; | |
410556ad SH |
953 | } __attribute__((aligned(8))); |
954 | ||
f0b9b795 SH |
955 | /* User bpf_sock_ops struct to access socket values and specify request ops |
956 | * and their replies. | |
957 | * Some of this fields are in network (bigendian) byte order and may need | |
958 | * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h). | |
959 | * New fields can only be added at the end of this structure | |
960 | */ | |
961 | struct bpf_sock_ops { | |
962 | __u32 op; | |
963 | union { | |
07ed8df6 DA |
964 | __u32 args[4]; /* Optionally passed to bpf program */ |
965 | __u32 reply; /* Returned by bpf program */ | |
966 | __u32 replylong[4]; /* Optionally returned by bpf prog */ | |
f0b9b795 SH |
967 | }; |
968 | __u32 family; | |
969 | __u32 remote_ip4; /* Stored in network byte order */ | |
970 | __u32 local_ip4; /* Stored in network byte order */ | |
971 | __u32 remote_ip6[4]; /* Stored in network byte order */ | |
972 | __u32 local_ip6[4]; /* Stored in network byte order */ | |
973 | __u32 remote_port; /* Stored in network byte order */ | |
974 | __u32 local_port; /* stored in host byte order */ | |
b7f5fd36 SH |
975 | __u32 is_fullsock; /* Some TCP fields are only valid if |
976 | * there is a full socket. If not, the | |
977 | * fields read as zero. | |
978 | */ | |
979 | __u32 snd_cwnd; | |
980 | __u32 srtt_us; /* Averaged RTT << 3 in usecs */ | |
07ed8df6 DA |
981 | __u32 bpf_sock_ops_cb_flags; /* flags defined in uapi/linux/tcp.h */ |
982 | __u32 state; | |
983 | __u32 rtt_min; | |
984 | __u32 snd_ssthresh; | |
985 | __u32 rcv_nxt; | |
986 | __u32 snd_nxt; | |
987 | __u32 snd_una; | |
988 | __u32 mss_cache; | |
989 | __u32 ecn_flags; | |
990 | __u32 rate_delivered; | |
991 | __u32 rate_interval_us; | |
992 | __u32 packets_out; | |
993 | __u32 retrans_out; | |
994 | __u32 total_retrans; | |
995 | __u32 segs_in; | |
996 | __u32 data_segs_in; | |
997 | __u32 segs_out; | |
998 | __u32 data_segs_out; | |
999 | __u32 lost_out; | |
1000 | __u32 sacked_out; | |
1001 | __u32 sk_txhash; | |
1002 | __u64 bytes_received; | |
1003 | __u64 bytes_acked; | |
f0b9b795 SH |
1004 | }; |
1005 | ||
07ed8df6 DA |
1006 | /* Definitions for bpf_sock_ops_cb_flags */ |
1007 | #define BPF_SOCK_OPS_RTO_CB_FLAG (1<<0) | |
1008 | #define BPF_SOCK_OPS_RETRANS_CB_FLAG (1<<1) | |
1009 | #define BPF_SOCK_OPS_STATE_CB_FLAG (1<<2) | |
1010 | #define BPF_SOCK_OPS_ALL_CB_FLAGS 0x7 /* Mask of all currently | |
1011 | * supported cb flags | |
1012 | */ | |
1013 | ||
f0b9b795 SH |
1014 | /* List of known BPF sock_ops operators. |
1015 | * New entries can only be added at the end | |
1016 | */ | |
1017 | enum { | |
1018 | BPF_SOCK_OPS_VOID, | |
1019 | BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or | |
1020 | * -1 if default value should be used | |
1021 | */ | |
1022 | BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized | |
1023 | * window (in packets) or -1 if default | |
1024 | * value should be used | |
1025 | */ | |
1026 | BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an | |
1027 | * active connection is initialized | |
1028 | */ | |
1029 | BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an | |
1030 | * active connection is | |
1031 | * established | |
1032 | */ | |
1033 | BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a | |
1034 | * passive connection is | |
1035 | * established | |
1036 | */ | |
1037 | BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control | |
1038 | * needs ECN | |
1039 | */ | |
fa19d6bc SH |
1040 | BPF_SOCK_OPS_BASE_RTT, /* Get base RTT. The correct value is |
1041 | * based on the path and may be | |
1042 | * dependent on the congestion control | |
1043 | * algorithm. In general it indicates | |
1044 | * a congestion threshold. RTTs above | |
1045 | * this indicate congestion | |
1046 | */ | |
07ed8df6 DA |
1047 | BPF_SOCK_OPS_RTO_CB, /* Called when an RTO has triggered. |
1048 | * Arg1: value of icsk_retransmits | |
1049 | * Arg2: value of icsk_rto | |
1050 | * Arg3: whether RTO has expired | |
1051 | */ | |
1052 | BPF_SOCK_OPS_RETRANS_CB, /* Called when skb is retransmitted. | |
1053 | * Arg1: sequence number of 1st byte | |
1054 | * Arg2: # segments | |
1055 | * Arg3: return value of | |
1056 | * tcp_transmit_skb (0 => success) | |
1057 | */ | |
1058 | BPF_SOCK_OPS_STATE_CB, /* Called when TCP changes state. | |
1059 | * Arg1: old_state | |
1060 | * Arg2: new_state | |
1061 | */ | |
1062 | }; | |
1063 | ||
1064 | /* List of TCP states. There is a build check in net/ipv4/tcp.c to detect | |
1065 | * changes between the TCP and BPF versions. Ideally this should never happen. | |
1066 | * If it does, we need to add code to convert them before calling | |
1067 | * the BPF sock_ops function. | |
1068 | */ | |
1069 | enum { | |
1070 | BPF_TCP_ESTABLISHED = 1, | |
1071 | BPF_TCP_SYN_SENT, | |
1072 | BPF_TCP_SYN_RECV, | |
1073 | BPF_TCP_FIN_WAIT1, | |
1074 | BPF_TCP_FIN_WAIT2, | |
1075 | BPF_TCP_TIME_WAIT, | |
1076 | BPF_TCP_CLOSE, | |
1077 | BPF_TCP_CLOSE_WAIT, | |
1078 | BPF_TCP_LAST_ACK, | |
1079 | BPF_TCP_LISTEN, | |
1080 | BPF_TCP_CLOSING, /* Now a valid state */ | |
1081 | BPF_TCP_NEW_SYN_RECV, | |
1082 | ||
1083 | BPF_TCP_MAX_STATES /* Leave at the end! */ | |
f0b9b795 SH |
1084 | }; |
1085 | ||
1086 | #define TCP_BPF_IW 1001 /* Set TCP initial congestion window */ | |
1087 | #define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */ | |
1088 | ||
f53da99a SH |
1089 | struct bpf_perf_event_value { |
1090 | __u64 counter; | |
1091 | __u64 enabled; | |
1092 | __u64 running; | |
1093 | }; | |
1094 | ||
665ef5a5 SH |
1095 | #define BPF_DEVCG_ACC_MKNOD (1ULL << 0) |
1096 | #define BPF_DEVCG_ACC_READ (1ULL << 1) | |
1097 | #define BPF_DEVCG_ACC_WRITE (1ULL << 2) | |
1098 | ||
1099 | #define BPF_DEVCG_DEV_BLOCK (1ULL << 0) | |
1100 | #define BPF_DEVCG_DEV_CHAR (1ULL << 1) | |
1101 | ||
1102 | struct bpf_cgroup_dev_ctx { | |
c0788a09 DA |
1103 | /* access_type encoded as (BPF_DEVCG_ACC_* << 16) | BPF_DEVCG_DEV_* */ |
1104 | __u32 access_type; | |
665ef5a5 SH |
1105 | __u32 major; |
1106 | __u32 minor; | |
1107 | }; | |
1108 | ||
b54ac87e | 1109 | #endif /* __LINUX_BPF_H__ */ |