1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
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.
8 #ifndef _UAPI__LINUX_BPF_H__
9 #define _UAPI__LINUX_BPF_H__
11 #include <linux/types.h>
12 #include <linux/bpf_common.h>
14 /* Extended instruction set based on top of classic BPF */
16 /* instruction classes */
17 #define BPF_ALU64 0x07 /* alu mode in double word width */
20 #define BPF_DW 0x18 /* double word */
21 #define BPF_XADD 0xc0 /* exclusive add */
24 #define BPF_MOV 0xb0 /* mov reg to reg */
25 #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */
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
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 */
45 /* Register numbers */
61 /* BPF has 10 general purpose 64-bit registers and stack frame. */
62 #define MAX_BPF_REG __MAX_BPF_REG
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 */
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 */
78 /* BPF syscall commands, see bpf(2) man-page for details. */
93 BPF_PROG_GET_FD_BY_ID,
95 BPF_OBJ_GET_INFO_BY_FD,
103 BPF_MAP_TYPE_PROG_ARRAY,
104 BPF_MAP_TYPE_PERF_EVENT_ARRAY,
105 BPF_MAP_TYPE_PERCPU_HASH,
106 BPF_MAP_TYPE_PERCPU_ARRAY,
107 BPF_MAP_TYPE_STACK_TRACE,
108 BPF_MAP_TYPE_CGROUP_ARRAY,
109 BPF_MAP_TYPE_LRU_HASH,
110 BPF_MAP_TYPE_LRU_PERCPU_HASH,
111 BPF_MAP_TYPE_LPM_TRIE,
112 BPF_MAP_TYPE_ARRAY_OF_MAPS,
113 BPF_MAP_TYPE_HASH_OF_MAPS,
115 BPF_MAP_TYPE_SOCKMAP,
120 BPF_PROG_TYPE_UNSPEC,
121 BPF_PROG_TYPE_SOCKET_FILTER,
122 BPF_PROG_TYPE_KPROBE,
123 BPF_PROG_TYPE_SCHED_CLS,
124 BPF_PROG_TYPE_SCHED_ACT,
125 BPF_PROG_TYPE_TRACEPOINT,
127 BPF_PROG_TYPE_PERF_EVENT,
128 BPF_PROG_TYPE_CGROUP_SKB,
129 BPF_PROG_TYPE_CGROUP_SOCK,
130 BPF_PROG_TYPE_LWT_IN,
131 BPF_PROG_TYPE_LWT_OUT,
132 BPF_PROG_TYPE_LWT_XMIT,
133 BPF_PROG_TYPE_SOCK_OPS,
134 BPF_PROG_TYPE_SK_SKB,
137 enum bpf_attach_type {
138 BPF_CGROUP_INET_INGRESS,
139 BPF_CGROUP_INET_EGRESS,
140 BPF_CGROUP_INET_SOCK_CREATE,
142 BPF_SK_SKB_STREAM_PARSER,
143 BPF_SK_SKB_STREAM_VERDICT,
144 __MAX_BPF_ATTACH_TYPE
147 #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE
149 /* cgroup-bpf attach flags used in BPF_PROG_ATTACH command
151 * NONE(default): No further bpf programs allowed in the subtree.
153 * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program,
154 * the program in this cgroup yields to sub-cgroup program.
156 * BPF_F_ALLOW_MULTI: If a sub-cgroup installs some bpf program,
157 * that cgroup program gets run in addition to the program in this cgroup.
159 * Only one program is allowed to be attached to a cgroup with
160 * NONE or BPF_F_ALLOW_OVERRIDE flag.
161 * Attaching another program on top of NONE or BPF_F_ALLOW_OVERRIDE will
162 * release old program and attach the new one. Attach flags has to match.
164 * Multiple programs are allowed to be attached to a cgroup with
165 * BPF_F_ALLOW_MULTI flag. They are executed in FIFO order
166 * (those that were attached first, run first)
167 * The programs of sub-cgroup are executed first, then programs of
168 * this cgroup and then programs of parent cgroup.
169 * When children program makes decision (like picking TCP CA or sock bind)
170 * parent program has a chance to override it.
172 * A cgroup with MULTI or OVERRIDE flag allows any attach flags in sub-cgroups.
173 * A cgroup with NONE doesn't allow any programs in sub-cgroups.
175 * cgrp1 (MULTI progs A, B) ->
176 * cgrp2 (OVERRIDE prog C) ->
177 * cgrp3 (MULTI prog D) ->
178 * cgrp4 (OVERRIDE prog E) ->
179 * cgrp5 (NONE prog F)
180 * the event in cgrp5 triggers execution of F,D,A,B in that order.
181 * if prog F is detached, the execution is E,D,A,B
182 * if prog F and D are detached, the execution is E,A,B
183 * if prog F, E and D are detached, the execution is C,A,B
185 * All eligible programs are executed regardless of return code from
188 #define BPF_F_ALLOW_OVERRIDE (1U << 0)
189 #define BPF_F_ALLOW_MULTI (1U << 1)
191 /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the
192 * verifier will perform strict alignment checking as if the kernel
193 * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set,
194 * and NET_IP_ALIGN defined to 2.
196 #define BPF_F_STRICT_ALIGNMENT (1U << 0)
198 #define BPF_PSEUDO_MAP_FD 1
200 /* flags for BPF_MAP_UPDATE_ELEM command */
201 #define BPF_ANY 0 /* create new element or update existing */
202 #define BPF_NOEXIST 1 /* create new element if it didn't exist */
203 #define BPF_EXIST 2 /* update existing element */
205 /* flags for BPF_MAP_CREATE command */
206 #define BPF_F_NO_PREALLOC (1U << 0)
207 /* Instead of having one common LRU list in the
208 * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
209 * which can scale and perform better.
210 * Note, the LRU nodes (including free nodes) cannot be moved
211 * across different LRU lists.
213 #define BPF_F_NO_COMMON_LRU (1U << 1)
214 /* Specify numa node during map creation */
215 #define BPF_F_NUMA_NODE (1U << 2)
217 /* flags for BPF_PROG_QUERY */
218 #define BPF_F_QUERY_EFFECTIVE (1U << 0)
220 #define BPF_OBJ_NAME_LEN 16U
222 /* Flags for accessing BPF object */
223 #define BPF_F_RDONLY (1U << 3)
224 #define BPF_F_WRONLY (1U << 4)
227 struct { /* anonymous struct used by BPF_MAP_CREATE command */
228 __u32 map_type; /* one of enum bpf_map_type */
229 __u32 key_size; /* size of key in bytes */
230 __u32 value_size; /* size of value in bytes */
231 __u32 max_entries; /* max number of entries in a map */
232 __u32 map_flags; /* BPF_MAP_CREATE related
233 * flags defined above.
235 __u32 inner_map_fd; /* fd pointing to the inner map */
236 __u32 numa_node; /* numa node (effective only if
237 * BPF_F_NUMA_NODE is set).
239 char map_name[BPF_OBJ_NAME_LEN];
242 struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
247 __aligned_u64 next_key;
252 struct { /* anonymous struct used by BPF_PROG_LOAD command */
253 __u32 prog_type; /* one of enum bpf_prog_type */
256 __aligned_u64 license;
257 __u32 log_level; /* verbosity level of verifier */
258 __u32 log_size; /* size of user buffer */
259 __aligned_u64 log_buf; /* user supplied buffer */
260 __u32 kern_version; /* checked when prog_type=kprobe */
262 char prog_name[BPF_OBJ_NAME_LEN];
263 __u32 prog_target_ifindex; /* ifindex of netdev to prep for */
266 struct { /* anonymous struct used by BPF_OBJ_* commands */
267 __aligned_u64 pathname;
272 struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
273 __u32 target_fd; /* container object to attach to */
274 __u32 attach_bpf_fd; /* eBPF program to attach */
279 struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
284 __aligned_u64 data_in;
285 __aligned_u64 data_out;
290 struct { /* anonymous struct used by BPF_*_GET_*_ID */
300 struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
306 struct { /* anonymous struct used by BPF_PROG_QUERY command */
307 __u32 target_fd; /* container object to query */
311 __aligned_u64 prog_ids;
314 } __attribute__((aligned(8)));
316 /* BPF helper function descriptions:
318 * void *bpf_map_lookup_elem(&map, &key)
319 * Return: Map value or NULL
321 * int bpf_map_update_elem(&map, &key, &value, flags)
322 * Return: 0 on success or negative error
324 * int bpf_map_delete_elem(&map, &key)
325 * Return: 0 on success or negative error
327 * int bpf_probe_read(void *dst, int size, void *src)
328 * Return: 0 on success or negative error
330 * u64 bpf_ktime_get_ns(void)
331 * Return: current ktime
333 * int bpf_trace_printk(const char *fmt, int fmt_size, ...)
334 * Return: length of buffer written or negative error
336 * u32 bpf_prandom_u32(void)
337 * Return: random value
339 * u32 bpf_raw_smp_processor_id(void)
340 * Return: SMP processor ID
342 * int bpf_skb_store_bytes(skb, offset, from, len, flags)
343 * store bytes into packet
344 * @skb: pointer to skb
345 * @offset: offset within packet from skb->mac_header
346 * @from: pointer where to copy bytes from
347 * @len: number of bytes to store into packet
348 * @flags: bit 0 - if true, recompute skb->csum
349 * other bits - reserved
350 * Return: 0 on success or negative error
352 * int bpf_l3_csum_replace(skb, offset, from, to, flags)
353 * recompute IP checksum
354 * @skb: pointer to skb
355 * @offset: offset within packet where IP checksum is located
356 * @from: old value of header field
357 * @to: new value of header field
358 * @flags: bits 0-3 - size of header field
359 * other bits - reserved
360 * Return: 0 on success or negative error
362 * int bpf_l4_csum_replace(skb, offset, from, to, flags)
363 * recompute TCP/UDP checksum
364 * @skb: pointer to skb
365 * @offset: offset within packet where TCP/UDP checksum is located
366 * @from: old value of header field
367 * @to: new value of header field
368 * @flags: bits 0-3 - size of header field
369 * bit 4 - is pseudo header
370 * other bits - reserved
371 * Return: 0 on success or negative error
373 * int bpf_tail_call(ctx, prog_array_map, index)
374 * jump into another BPF program
375 * @ctx: context pointer passed to next program
376 * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
377 * @index: 32-bit index inside array that selects specific program to run
378 * Return: 0 on success or negative error
380 * int bpf_clone_redirect(skb, ifindex, flags)
381 * redirect to another netdev
382 * @skb: pointer to skb
383 * @ifindex: ifindex of the net device
384 * @flags: bit 0 - if set, redirect to ingress instead of egress
385 * other bits - reserved
386 * Return: 0 on success or negative error
388 * u64 bpf_get_current_pid_tgid(void)
389 * Return: current->tgid << 32 | current->pid
391 * u64 bpf_get_current_uid_gid(void)
392 * Return: current_gid << 32 | current_uid
394 * int bpf_get_current_comm(char *buf, int size_of_buf)
395 * stores current->comm into buf
396 * Return: 0 on success or negative error
398 * u32 bpf_get_cgroup_classid(skb)
399 * retrieve a proc's classid
400 * @skb: pointer to skb
401 * Return: classid if != 0
403 * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
404 * Return: 0 on success or negative error
406 * int bpf_skb_vlan_pop(skb)
407 * Return: 0 on success or negative error
409 * int bpf_skb_get_tunnel_key(skb, key, size, flags)
410 * int bpf_skb_set_tunnel_key(skb, key, size, flags)
411 * retrieve or populate tunnel metadata
412 * @skb: pointer to skb
413 * @key: pointer to 'struct bpf_tunnel_key'
414 * @size: size of 'struct bpf_tunnel_key'
415 * @flags: room for future extensions
416 * Return: 0 on success or negative error
418 * u64 bpf_perf_event_read(map, flags)
419 * read perf event counter value
420 * @map: pointer to perf_event_array map
421 * @flags: index of event in the map or bitmask flags
422 * Return: value of perf event counter read or error code
424 * int bpf_redirect(ifindex, flags)
425 * redirect to another netdev
426 * @ifindex: ifindex of the net device
429 * bit 0 - if set, redirect to ingress instead of egress
430 * other bits - reserved
432 * all bits - reserved
433 * Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error
434 * xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error
435 * int bpf_redirect_map(map, key, flags)
436 * redirect to endpoint in map
437 * @map: pointer to dev map
438 * @key: index in map to lookup
440 * Return: XDP_REDIRECT on success or XDP_ABORT on error
442 * u32 bpf_get_route_realm(skb)
443 * retrieve a dst's tclassid
444 * @skb: pointer to skb
445 * Return: realm if != 0
447 * int bpf_perf_event_output(ctx, map, flags, data, size)
448 * output perf raw sample
449 * @ctx: struct pt_regs*
450 * @map: pointer to perf_event_array map
451 * @flags: index of event in the map or bitmask flags
452 * @data: data on stack to be output as raw data
453 * @size: size of data
454 * Return: 0 on success or negative error
456 * int bpf_get_stackid(ctx, map, flags)
457 * walk user or kernel stack and return id
458 * @ctx: struct pt_regs*
459 * @map: pointer to stack_trace map
460 * @flags: bits 0-7 - numer of stack frames to skip
461 * bit 8 - collect user stack instead of kernel
462 * bit 9 - compare stacks by hash only
463 * bit 10 - if two different stacks hash into the same stackid
465 * other bits - reserved
466 * Return: >= 0 stackid on success or negative error
468 * s64 bpf_csum_diff(from, from_size, to, to_size, seed)
469 * calculate csum diff
470 * @from: raw from buffer
471 * @from_size: length of from buffer
473 * @to_size: length of to buffer
474 * @seed: optional seed
475 * Return: csum result or negative error code
477 * int bpf_skb_get_tunnel_opt(skb, opt, size)
478 * retrieve tunnel options metadata
479 * @skb: pointer to skb
480 * @opt: pointer to raw tunnel option data
481 * @size: size of @opt
482 * Return: option size
484 * int bpf_skb_set_tunnel_opt(skb, opt, size)
485 * populate tunnel options metadata
486 * @skb: pointer to skb
487 * @opt: pointer to raw tunnel option data
488 * @size: size of @opt
489 * Return: 0 on success or negative error
491 * int bpf_skb_change_proto(skb, proto, flags)
492 * Change protocol of the skb. Currently supported is v4 -> v6,
493 * v6 -> v4 transitions. The helper will also resize the skb. eBPF
494 * program is expected to fill the new headers via skb_store_bytes
495 * and lX_csum_replace.
496 * @skb: pointer to skb
497 * @proto: new skb->protocol type
499 * Return: 0 on success or negative error
501 * int bpf_skb_change_type(skb, type)
502 * Change packet type of skb.
503 * @skb: pointer to skb
504 * @type: new skb->pkt_type type
505 * Return: 0 on success or negative error
507 * int bpf_skb_under_cgroup(skb, map, index)
508 * Check cgroup2 membership of skb
509 * @skb: pointer to skb
510 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
511 * @index: index of the cgroup in the bpf_map
513 * == 0 skb failed the cgroup2 descendant test
514 * == 1 skb succeeded the cgroup2 descendant test
517 * u32 bpf_get_hash_recalc(skb)
518 * Retrieve and possibly recalculate skb->hash.
519 * @skb: pointer to skb
522 * u64 bpf_get_current_task(void)
523 * Returns current task_struct
526 * int bpf_probe_write_user(void *dst, void *src, int len)
527 * safely attempt to write to a location
528 * @dst: destination address in userspace
529 * @src: source address on stack
530 * @len: number of bytes to copy
531 * Return: 0 on success or negative error
533 * int bpf_current_task_under_cgroup(map, index)
534 * Check cgroup2 membership of current task
535 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
536 * @index: index of the cgroup in the bpf_map
538 * == 0 current failed the cgroup2 descendant test
539 * == 1 current succeeded the cgroup2 descendant test
542 * int bpf_skb_change_tail(skb, len, flags)
543 * The helper will resize the skb to the given new size, to be used f.e.
544 * with control messages.
545 * @skb: pointer to skb
546 * @len: new skb length
548 * Return: 0 on success or negative error
550 * int bpf_skb_pull_data(skb, len)
551 * The helper will pull in non-linear data in case the skb is non-linear
552 * and not all of len are part of the linear section. Only needed for
553 * read/write with direct packet access.
554 * @skb: pointer to skb
555 * @len: len to make read/writeable
556 * Return: 0 on success or negative error
558 * s64 bpf_csum_update(skb, csum)
559 * Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
560 * @skb: pointer to skb
562 * Return: csum on success or negative error
564 * void bpf_set_hash_invalid(skb)
565 * Invalidate current skb->hash.
566 * @skb: pointer to skb
568 * int bpf_get_numa_node_id()
569 * Return: Id of current NUMA node.
571 * int bpf_skb_change_head()
572 * Grows headroom of skb and adjusts MAC header offset accordingly.
573 * Will extends/reallocae as required automatically.
574 * May change skb data pointer and will thus invalidate any check
575 * performed for direct packet access.
576 * @skb: pointer to skb
577 * @len: length of header to be pushed in front
578 * @flags: Flags (unused for now)
579 * Return: 0 on success or negative error
581 * int bpf_xdp_adjust_head(xdp_md, delta)
582 * Adjust the xdp_md.data by delta
583 * @xdp_md: pointer to xdp_md
584 * @delta: An positive/negative integer to be added to xdp_md.data
585 * Return: 0 on success or negative on error
587 * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
588 * Copy a NUL terminated string from unsafe address. In case the string
589 * length is smaller than size, the target is not padded with further NUL
590 * bytes. In case the string length is larger than size, just count-1
591 * bytes are copied and the last byte is set to NUL.
592 * @dst: destination address
593 * @size: maximum number of bytes to copy, including the trailing NUL
594 * @unsafe_ptr: unsafe address
596 * > 0 length of the string including the trailing NUL on success
599 * u64 bpf_get_socket_cookie(skb)
600 * Get the cookie for the socket stored inside sk_buff.
601 * @skb: pointer to skb
602 * Return: 8 Bytes non-decreasing number on success or 0 if the socket
603 * field is missing inside sk_buff
605 * u32 bpf_get_socket_uid(skb)
606 * Get the owner uid of the socket stored inside sk_buff.
607 * @skb: pointer to skb
608 * Return: uid of the socket owner on success or overflowuid if failed.
610 * u32 bpf_set_hash(skb, hash)
611 * Set full skb->hash.
612 * @skb: pointer to skb
615 * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
616 * Calls setsockopt. Not all opts are available, only those with
617 * integer optvals plus TCP_CONGESTION.
618 * Supported levels: SOL_SOCKET and IPPROTO_TCP
619 * @bpf_socket: pointer to bpf_socket
620 * @level: SOL_SOCKET or IPPROTO_TCP
621 * @optname: option name
622 * @optval: pointer to option value
623 * @optlen: length of optval in bytes
624 * Return: 0 or negative error
626 * int bpf_getsockopt(bpf_socket, level, optname, optval, optlen)
627 * Calls getsockopt. Not all opts are available.
628 * Supported levels: IPPROTO_TCP
629 * @bpf_socket: pointer to bpf_socket
630 * @level: IPPROTO_TCP
631 * @optname: option name
632 * @optval: pointer to option value
633 * @optlen: length of optval in bytes
634 * Return: 0 or negative error
636 * int bpf_skb_adjust_room(skb, len_diff, mode, flags)
637 * Grow or shrink room in sk_buff.
638 * @skb: pointer to skb
639 * @len_diff: (signed) amount of room to grow/shrink
640 * @mode: operation mode (enum bpf_adj_room_mode)
641 * @flags: reserved for future use
642 * Return: 0 on success or negative error code
644 * int bpf_sk_redirect_map(map, key, flags)
645 * Redirect skb to a sock in map using key as a lookup key for the
647 * @map: pointer to sockmap
648 * @key: key to lookup sock in map
649 * @flags: reserved for future use
652 * int bpf_sock_map_update(skops, map, key, flags)
653 * @skops: pointer to bpf_sock_ops
654 * @map: pointer to sockmap to update
655 * @key: key to insert/update sock in map
656 * @flags: same flags as map update elem
658 * int bpf_xdp_adjust_meta(xdp_md, delta)
659 * Adjust the xdp_md.data_meta by delta
660 * @xdp_md: pointer to xdp_md
661 * @delta: An positive/negative integer to be added to xdp_md.data_meta
662 * Return: 0 on success or negative on error
664 * int bpf_perf_event_read_value(map, flags, buf, buf_size)
665 * read perf event counter value and perf event enabled/running time
666 * @map: pointer to perf_event_array map
667 * @flags: index of event in the map or bitmask flags
669 * @buf_size: size of the buf
670 * Return: 0 on success or negative error code
672 * int bpf_perf_prog_read_value(ctx, buf, buf_size)
673 * read perf prog attached perf event counter and enabled/running time
674 * @ctx: pointer to ctx
676 * @buf_size: size of the buf
677 * Return : 0 on success or negative error code
679 #define __BPF_FUNC_MAPPER(FN) \
681 FN(map_lookup_elem), \
682 FN(map_update_elem), \
683 FN(map_delete_elem), \
687 FN(get_prandom_u32), \
688 FN(get_smp_processor_id), \
689 FN(skb_store_bytes), \
690 FN(l3_csum_replace), \
691 FN(l4_csum_replace), \
693 FN(clone_redirect), \
694 FN(get_current_pid_tgid), \
695 FN(get_current_uid_gid), \
696 FN(get_current_comm), \
697 FN(get_cgroup_classid), \
700 FN(skb_get_tunnel_key), \
701 FN(skb_set_tunnel_key), \
702 FN(perf_event_read), \
704 FN(get_route_realm), \
705 FN(perf_event_output), \
706 FN(skb_load_bytes), \
709 FN(skb_get_tunnel_opt), \
710 FN(skb_set_tunnel_opt), \
711 FN(skb_change_proto), \
712 FN(skb_change_type), \
713 FN(skb_under_cgroup), \
714 FN(get_hash_recalc), \
715 FN(get_current_task), \
716 FN(probe_write_user), \
717 FN(current_task_under_cgroup), \
718 FN(skb_change_tail), \
721 FN(set_hash_invalid), \
722 FN(get_numa_node_id), \
723 FN(skb_change_head), \
724 FN(xdp_adjust_head), \
725 FN(probe_read_str), \
726 FN(get_socket_cookie), \
727 FN(get_socket_uid), \
730 FN(skb_adjust_room), \
732 FN(sk_redirect_map), \
733 FN(sock_map_update), \
734 FN(xdp_adjust_meta), \
735 FN(perf_event_read_value), \
736 FN(perf_prog_read_value), \
739 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
740 * function eBPF program intends to call
742 #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
744 __BPF_FUNC_MAPPER(__BPF_ENUM_FN)
749 /* All flags used by eBPF helper functions, placed here. */
751 /* BPF_FUNC_skb_store_bytes flags. */
752 #define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
753 #define BPF_F_INVALIDATE_HASH (1ULL << 1)
755 /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
756 * First 4 bits are for passing the header field size.
758 #define BPF_F_HDR_FIELD_MASK 0xfULL
760 /* BPF_FUNC_l4_csum_replace flags. */
761 #define BPF_F_PSEUDO_HDR (1ULL << 4)
762 #define BPF_F_MARK_MANGLED_0 (1ULL << 5)
763 #define BPF_F_MARK_ENFORCE (1ULL << 6)
765 /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
766 #define BPF_F_INGRESS (1ULL << 0)
768 /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
769 #define BPF_F_TUNINFO_IPV6 (1ULL << 0)
771 /* BPF_FUNC_get_stackid flags. */
772 #define BPF_F_SKIP_FIELD_MASK 0xffULL
773 #define BPF_F_USER_STACK (1ULL << 8)
774 #define BPF_F_FAST_STACK_CMP (1ULL << 9)
775 #define BPF_F_REUSE_STACKID (1ULL << 10)
777 /* BPF_FUNC_skb_set_tunnel_key flags. */
778 #define BPF_F_ZERO_CSUM_TX (1ULL << 1)
779 #define BPF_F_DONT_FRAGMENT (1ULL << 2)
781 /* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and
782 * BPF_FUNC_perf_event_read_value flags.
784 #define BPF_F_INDEX_MASK 0xffffffffULL
785 #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK
786 /* BPF_FUNC_perf_event_output for sk_buff input context. */
787 #define BPF_F_CTXLEN_MASK (0xfffffULL << 32)
789 /* Mode for BPF_FUNC_skb_adjust_room helper. */
790 enum bpf_adj_room_mode {
794 /* user accessible mirror of in-kernel sk_buff.
795 * new fields can only be added to the end of this structure
807 __u32 ingress_ifindex;
817 /* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */
819 __u32 remote_ip4; /* Stored in network byte order */
820 __u32 local_ip4; /* Stored in network byte order */
821 __u32 remote_ip6[4]; /* Stored in network byte order */
822 __u32 local_ip6[4]; /* Stored in network byte order */
823 __u32 remote_port; /* Stored in network byte order */
824 __u32 local_port; /* stored in host byte order */
830 struct bpf_tunnel_key {
834 __u32 remote_ipv6[4];
842 /* Generic BPF return codes which all BPF program types may support.
843 * The values are binary compatible with their TC_ACT_* counter-part to
844 * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
847 * XDP is handled seprately, see XDP_*.
855 /* >127 are reserved for prog type specific return codes */
867 #define XDP_PACKET_HEADROOM 256
869 /* User return codes for XDP prog type.
870 * A valid XDP program must return one of these defined values. All other
871 * return codes are reserved for future use. Unknown return codes will
872 * result in packet drops and a warning via bpf_warn_invalid_xdp_action().
882 /* user accessible metadata for XDP packet hook
883 * new fields must be added to the end of this structure
896 #define BPF_TAG_SIZE 8
898 enum bpf_prog_status {
899 BPF_PROG_STATUS_DEV_BOUND = (1 << 0),
902 struct bpf_prog_info {
905 __u8 tag[BPF_TAG_SIZE];
906 __u32 jited_prog_len;
907 __u32 xlated_prog_len;
908 __aligned_u64 jited_prog_insns;
909 __aligned_u64 xlated_prog_insns;
910 __u64 load_time; /* ns since boottime */
911 __u32 created_by_uid;
913 __aligned_u64 map_ids;
914 char name[BPF_OBJ_NAME_LEN];
917 } __attribute__((aligned(8)));
919 struct bpf_map_info {
926 char name[BPF_OBJ_NAME_LEN];
927 } __attribute__((aligned(8)));
929 /* User bpf_sock_ops struct to access socket values and specify request ops
931 * Some of this fields are in network (bigendian) byte order and may need
932 * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
933 * New fields can only be added at the end of this structure
935 struct bpf_sock_ops {
942 __u32 remote_ip4; /* Stored in network byte order */
943 __u32 local_ip4; /* Stored in network byte order */
944 __u32 remote_ip6[4]; /* Stored in network byte order */
945 __u32 local_ip6[4]; /* Stored in network byte order */
946 __u32 remote_port; /* Stored in network byte order */
947 __u32 local_port; /* stored in host byte order */
950 /* List of known BPF sock_ops operators.
951 * New entries can only be added at the end
955 BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or
956 * -1 if default value should be used
958 BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized
959 * window (in packets) or -1 if default
960 * value should be used
962 BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an
963 * active connection is initialized
965 BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an
966 * active connection is
969 BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a
970 * passive connection is
973 BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control
976 BPF_SOCK_OPS_BASE_RTT, /* Get base RTT. The correct value is
977 * based on the path and may be
978 * dependent on the congestion control
979 * algorithm. In general it indicates
980 * a congestion threshold. RTTs above
981 * this indicate congestion
985 #define TCP_BPF_IW 1001 /* Set TCP initial congestion window */
986 #define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */
988 struct bpf_perf_event_value {
994 #endif /* _UAPI__LINUX_BPF_H__ */