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,
135 BPF_PROG_TYPE_CGROUP_DEVICE,
138 enum bpf_attach_type {
139 BPF_CGROUP_INET_INGRESS,
140 BPF_CGROUP_INET_EGRESS,
141 BPF_CGROUP_INET_SOCK_CREATE,
143 BPF_SK_SKB_STREAM_PARSER,
144 BPF_SK_SKB_STREAM_VERDICT,
146 __MAX_BPF_ATTACH_TYPE
149 #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE
151 /* cgroup-bpf attach flags used in BPF_PROG_ATTACH command
153 * NONE(default): No further bpf programs allowed in the subtree.
155 * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program,
156 * the program in this cgroup yields to sub-cgroup program.
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.
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.
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.
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.
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
187 * All eligible programs are executed regardless of return code from
190 #define BPF_F_ALLOW_OVERRIDE (1U << 0)
191 #define BPF_F_ALLOW_MULTI (1U << 1)
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.
198 #define BPF_F_STRICT_ALIGNMENT (1U << 0)
200 #define BPF_PSEUDO_MAP_FD 1
202 /* flags for BPF_MAP_UPDATE_ELEM command */
203 #define BPF_ANY 0 /* create new element or update existing */
204 #define BPF_NOEXIST 1 /* create new element if it didn't exist */
205 #define BPF_EXIST 2 /* update existing element */
207 /* flags for BPF_MAP_CREATE command */
208 #define BPF_F_NO_PREALLOC (1U << 0)
209 /* Instead of having one common LRU list in the
210 * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
211 * which can scale and perform better.
212 * Note, the LRU nodes (including free nodes) cannot be moved
213 * across different LRU lists.
215 #define BPF_F_NO_COMMON_LRU (1U << 1)
216 /* Specify numa node during map creation */
217 #define BPF_F_NUMA_NODE (1U << 2)
219 /* flags for BPF_PROG_QUERY */
220 #define BPF_F_QUERY_EFFECTIVE (1U << 0)
222 #define BPF_OBJ_NAME_LEN 16U
224 /* Flags for accessing BPF object */
225 #define BPF_F_RDONLY (1U << 3)
226 #define BPF_F_WRONLY (1U << 4)
229 struct { /* anonymous struct used by BPF_MAP_CREATE command */
230 __u32 map_type; /* one of enum bpf_map_type */
231 __u32 key_size; /* size of key in bytes */
232 __u32 value_size; /* size of value in bytes */
233 __u32 max_entries; /* max number of entries in a map */
234 __u32 map_flags; /* BPF_MAP_CREATE related
235 * flags defined above.
237 __u32 inner_map_fd; /* fd pointing to the inner map */
238 __u32 numa_node; /* numa node (effective only if
239 * BPF_F_NUMA_NODE is set).
241 char map_name[BPF_OBJ_NAME_LEN];
244 struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
249 __aligned_u64 next_key;
254 struct { /* anonymous struct used by BPF_PROG_LOAD command */
255 __u32 prog_type; /* one of enum bpf_prog_type */
258 __aligned_u64 license;
259 __u32 log_level; /* verbosity level of verifier */
260 __u32 log_size; /* size of user buffer */
261 __aligned_u64 log_buf; /* user supplied buffer */
262 __u32 kern_version; /* checked when prog_type=kprobe */
264 char prog_name[BPF_OBJ_NAME_LEN];
265 __u32 prog_target_ifindex; /* ifindex of netdev to prep for */
268 struct { /* anonymous struct used by BPF_OBJ_* commands */
269 __aligned_u64 pathname;
274 struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
275 __u32 target_fd; /* container object to attach to */
276 __u32 attach_bpf_fd; /* eBPF program to attach */
281 struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
286 __aligned_u64 data_in;
287 __aligned_u64 data_out;
292 struct { /* anonymous struct used by BPF_*_GET_*_ID */
302 struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
308 struct { /* anonymous struct used by BPF_PROG_QUERY command */
309 __u32 target_fd; /* container object to query */
313 __aligned_u64 prog_ids;
316 } __attribute__((aligned(8)));
318 /* BPF helper function descriptions:
320 * void *bpf_map_lookup_elem(&map, &key)
321 * Return: Map value or NULL
323 * int bpf_map_update_elem(&map, &key, &value, flags)
324 * Return: 0 on success or negative error
326 * int bpf_map_delete_elem(&map, &key)
327 * Return: 0 on success or negative error
329 * int bpf_probe_read(void *dst, int size, void *src)
330 * Return: 0 on success or negative error
332 * u64 bpf_ktime_get_ns(void)
333 * Return: current ktime
335 * int bpf_trace_printk(const char *fmt, int fmt_size, ...)
336 * Return: length of buffer written or negative error
338 * u32 bpf_prandom_u32(void)
339 * Return: random value
341 * u32 bpf_raw_smp_processor_id(void)
342 * Return: SMP processor ID
344 * int bpf_skb_store_bytes(skb, offset, from, len, flags)
345 * store bytes into packet
346 * @skb: pointer to skb
347 * @offset: offset within packet from skb->mac_header
348 * @from: pointer where to copy bytes from
349 * @len: number of bytes to store into packet
350 * @flags: bit 0 - if true, recompute skb->csum
351 * other bits - reserved
352 * Return: 0 on success or negative error
354 * int bpf_l3_csum_replace(skb, offset, from, to, flags)
355 * recompute IP checksum
356 * @skb: pointer to skb
357 * @offset: offset within packet where IP checksum is located
358 * @from: old value of header field
359 * @to: new value of header field
360 * @flags: bits 0-3 - size of header field
361 * other bits - reserved
362 * Return: 0 on success or negative error
364 * int bpf_l4_csum_replace(skb, offset, from, to, flags)
365 * recompute TCP/UDP checksum
366 * @skb: pointer to skb
367 * @offset: offset within packet where TCP/UDP checksum is located
368 * @from: old value of header field
369 * @to: new value of header field
370 * @flags: bits 0-3 - size of header field
371 * bit 4 - is pseudo header
372 * other bits - reserved
373 * Return: 0 on success or negative error
375 * int bpf_tail_call(ctx, prog_array_map, index)
376 * jump into another BPF program
377 * @ctx: context pointer passed to next program
378 * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
379 * @index: 32-bit index inside array that selects specific program to run
380 * Return: 0 on success or negative error
382 * int bpf_clone_redirect(skb, ifindex, flags)
383 * redirect to another netdev
384 * @skb: pointer to skb
385 * @ifindex: ifindex of the net device
386 * @flags: bit 0 - if set, redirect to ingress instead of egress
387 * other bits - reserved
388 * Return: 0 on success or negative error
390 * u64 bpf_get_current_pid_tgid(void)
391 * Return: current->tgid << 32 | current->pid
393 * u64 bpf_get_current_uid_gid(void)
394 * Return: current_gid << 32 | current_uid
396 * int bpf_get_current_comm(char *buf, int size_of_buf)
397 * stores current->comm into buf
398 * Return: 0 on success or negative error
400 * u32 bpf_get_cgroup_classid(skb)
401 * retrieve a proc's classid
402 * @skb: pointer to skb
403 * Return: classid if != 0
405 * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
406 * Return: 0 on success or negative error
408 * int bpf_skb_vlan_pop(skb)
409 * Return: 0 on success or negative error
411 * int bpf_skb_get_tunnel_key(skb, key, size, flags)
412 * int bpf_skb_set_tunnel_key(skb, key, size, flags)
413 * retrieve or populate tunnel metadata
414 * @skb: pointer to skb
415 * @key: pointer to 'struct bpf_tunnel_key'
416 * @size: size of 'struct bpf_tunnel_key'
417 * @flags: room for future extensions
418 * Return: 0 on success or negative error
420 * u64 bpf_perf_event_read(map, flags)
421 * read perf event counter value
422 * @map: pointer to perf_event_array map
423 * @flags: index of event in the map or bitmask flags
424 * Return: value of perf event counter read or error code
426 * int bpf_redirect(ifindex, flags)
427 * redirect to another netdev
428 * @ifindex: ifindex of the net device
431 * bit 0 - if set, redirect to ingress instead of egress
432 * other bits - reserved
434 * all bits - reserved
435 * Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error
436 * xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error
437 * int bpf_redirect_map(map, key, flags)
438 * redirect to endpoint in map
439 * @map: pointer to dev map
440 * @key: index in map to lookup
442 * Return: XDP_REDIRECT on success or XDP_ABORT on error
444 * u32 bpf_get_route_realm(skb)
445 * retrieve a dst's tclassid
446 * @skb: pointer to skb
447 * Return: realm if != 0
449 * int bpf_perf_event_output(ctx, map, flags, data, size)
450 * output perf raw sample
451 * @ctx: struct pt_regs*
452 * @map: pointer to perf_event_array map
453 * @flags: index of event in the map or bitmask flags
454 * @data: data on stack to be output as raw data
455 * @size: size of data
456 * Return: 0 on success or negative error
458 * int bpf_get_stackid(ctx, map, flags)
459 * walk user or kernel stack and return id
460 * @ctx: struct pt_regs*
461 * @map: pointer to stack_trace map
462 * @flags: bits 0-7 - numer of stack frames to skip
463 * bit 8 - collect user stack instead of kernel
464 * bit 9 - compare stacks by hash only
465 * bit 10 - if two different stacks hash into the same stackid
467 * other bits - reserved
468 * Return: >= 0 stackid on success or negative error
470 * s64 bpf_csum_diff(from, from_size, to, to_size, seed)
471 * calculate csum diff
472 * @from: raw from buffer
473 * @from_size: length of from buffer
475 * @to_size: length of to buffer
476 * @seed: optional seed
477 * Return: csum result or negative error code
479 * int bpf_skb_get_tunnel_opt(skb, opt, size)
480 * retrieve tunnel options metadata
481 * @skb: pointer to skb
482 * @opt: pointer to raw tunnel option data
483 * @size: size of @opt
484 * Return: option size
486 * int bpf_skb_set_tunnel_opt(skb, opt, size)
487 * populate tunnel options metadata
488 * @skb: pointer to skb
489 * @opt: pointer to raw tunnel option data
490 * @size: size of @opt
491 * Return: 0 on success or negative error
493 * int bpf_skb_change_proto(skb, proto, flags)
494 * Change protocol of the skb. Currently supported is v4 -> v6,
495 * v6 -> v4 transitions. The helper will also resize the skb. eBPF
496 * program is expected to fill the new headers via skb_store_bytes
497 * and lX_csum_replace.
498 * @skb: pointer to skb
499 * @proto: new skb->protocol type
501 * Return: 0 on success or negative error
503 * int bpf_skb_change_type(skb, type)
504 * Change packet type of skb.
505 * @skb: pointer to skb
506 * @type: new skb->pkt_type type
507 * Return: 0 on success or negative error
509 * int bpf_skb_under_cgroup(skb, map, index)
510 * Check cgroup2 membership of skb
511 * @skb: pointer to skb
512 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
513 * @index: index of the cgroup in the bpf_map
515 * == 0 skb failed the cgroup2 descendant test
516 * == 1 skb succeeded the cgroup2 descendant test
519 * u32 bpf_get_hash_recalc(skb)
520 * Retrieve and possibly recalculate skb->hash.
521 * @skb: pointer to skb
524 * u64 bpf_get_current_task(void)
525 * Returns current task_struct
528 * int bpf_probe_write_user(void *dst, void *src, int len)
529 * safely attempt to write to a location
530 * @dst: destination address in userspace
531 * @src: source address on stack
532 * @len: number of bytes to copy
533 * Return: 0 on success or negative error
535 * int bpf_current_task_under_cgroup(map, index)
536 * Check cgroup2 membership of current task
537 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
538 * @index: index of the cgroup in the bpf_map
540 * == 0 current failed the cgroup2 descendant test
541 * == 1 current succeeded the cgroup2 descendant test
544 * int bpf_skb_change_tail(skb, len, flags)
545 * The helper will resize the skb to the given new size, to be used f.e.
546 * with control messages.
547 * @skb: pointer to skb
548 * @len: new skb length
550 * Return: 0 on success or negative error
552 * int bpf_skb_pull_data(skb, len)
553 * The helper will pull in non-linear data in case the skb is non-linear
554 * and not all of len are part of the linear section. Only needed for
555 * read/write with direct packet access.
556 * @skb: pointer to skb
557 * @len: len to make read/writeable
558 * Return: 0 on success or negative error
560 * s64 bpf_csum_update(skb, csum)
561 * Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
562 * @skb: pointer to skb
564 * Return: csum on success or negative error
566 * void bpf_set_hash_invalid(skb)
567 * Invalidate current skb->hash.
568 * @skb: pointer to skb
570 * int bpf_get_numa_node_id()
571 * Return: Id of current NUMA node.
573 * int bpf_skb_change_head()
574 * Grows headroom of skb and adjusts MAC header offset accordingly.
575 * Will extends/reallocae as required automatically.
576 * May change skb data pointer and will thus invalidate any check
577 * performed for direct packet access.
578 * @skb: pointer to skb
579 * @len: length of header to be pushed in front
580 * @flags: Flags (unused for now)
581 * Return: 0 on success or negative error
583 * int bpf_xdp_adjust_head(xdp_md, delta)
584 * Adjust the xdp_md.data by delta
585 * @xdp_md: pointer to xdp_md
586 * @delta: An positive/negative integer to be added to xdp_md.data
587 * Return: 0 on success or negative on error
589 * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
590 * Copy a NUL terminated string from unsafe address. In case the string
591 * length is smaller than size, the target is not padded with further NUL
592 * bytes. In case the string length is larger than size, just count-1
593 * bytes are copied and the last byte is set to NUL.
594 * @dst: destination address
595 * @size: maximum number of bytes to copy, including the trailing NUL
596 * @unsafe_ptr: unsafe address
598 * > 0 length of the string including the trailing NUL on success
601 * u64 bpf_get_socket_cookie(skb)
602 * Get the cookie for the socket stored inside sk_buff.
603 * @skb: pointer to skb
604 * Return: 8 Bytes non-decreasing number on success or 0 if the socket
605 * field is missing inside sk_buff
607 * u32 bpf_get_socket_uid(skb)
608 * Get the owner uid of the socket stored inside sk_buff.
609 * @skb: pointer to skb
610 * Return: uid of the socket owner on success or overflowuid if failed.
612 * u32 bpf_set_hash(skb, hash)
613 * Set full skb->hash.
614 * @skb: pointer to skb
617 * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
618 * Calls setsockopt. Not all opts are available, only those with
619 * integer optvals plus TCP_CONGESTION.
620 * Supported levels: SOL_SOCKET and IPPROTO_TCP
621 * @bpf_socket: pointer to bpf_socket
622 * @level: SOL_SOCKET or IPPROTO_TCP
623 * @optname: option name
624 * @optval: pointer to option value
625 * @optlen: length of optval in bytes
626 * Return: 0 or negative error
628 * int bpf_getsockopt(bpf_socket, level, optname, optval, optlen)
629 * Calls getsockopt. Not all opts are available.
630 * Supported levels: IPPROTO_TCP
631 * @bpf_socket: pointer to bpf_socket
632 * @level: IPPROTO_TCP
633 * @optname: option name
634 * @optval: pointer to option value
635 * @optlen: length of optval in bytes
636 * Return: 0 or negative error
638 * int bpf_skb_adjust_room(skb, len_diff, mode, flags)
639 * Grow or shrink room in sk_buff.
640 * @skb: pointer to skb
641 * @len_diff: (signed) amount of room to grow/shrink
642 * @mode: operation mode (enum bpf_adj_room_mode)
643 * @flags: reserved for future use
644 * Return: 0 on success or negative error code
646 * int bpf_sk_redirect_map(map, key, flags)
647 * Redirect skb to a sock in map using key as a lookup key for the
649 * @map: pointer to sockmap
650 * @key: key to lookup sock in map
651 * @flags: reserved for future use
654 * int bpf_sock_map_update(skops, map, key, flags)
655 * @skops: pointer to bpf_sock_ops
656 * @map: pointer to sockmap to update
657 * @key: key to insert/update sock in map
658 * @flags: same flags as map update elem
660 * int bpf_xdp_adjust_meta(xdp_md, delta)
661 * Adjust the xdp_md.data_meta by delta
662 * @xdp_md: pointer to xdp_md
663 * @delta: An positive/negative integer to be added to xdp_md.data_meta
664 * Return: 0 on success or negative on error
666 * int bpf_perf_event_read_value(map, flags, buf, buf_size)
667 * read perf event counter value and perf event enabled/running time
668 * @map: pointer to perf_event_array map
669 * @flags: index of event in the map or bitmask flags
671 * @buf_size: size of the buf
672 * Return: 0 on success or negative error code
674 * int bpf_perf_prog_read_value(ctx, buf, buf_size)
675 * read perf prog attached perf event counter and enabled/running time
676 * @ctx: pointer to ctx
678 * @buf_size: size of the buf
679 * Return : 0 on success or negative error code
681 #define __BPF_FUNC_MAPPER(FN) \
683 FN(map_lookup_elem), \
684 FN(map_update_elem), \
685 FN(map_delete_elem), \
689 FN(get_prandom_u32), \
690 FN(get_smp_processor_id), \
691 FN(skb_store_bytes), \
692 FN(l3_csum_replace), \
693 FN(l4_csum_replace), \
695 FN(clone_redirect), \
696 FN(get_current_pid_tgid), \
697 FN(get_current_uid_gid), \
698 FN(get_current_comm), \
699 FN(get_cgroup_classid), \
702 FN(skb_get_tunnel_key), \
703 FN(skb_set_tunnel_key), \
704 FN(perf_event_read), \
706 FN(get_route_realm), \
707 FN(perf_event_output), \
708 FN(skb_load_bytes), \
711 FN(skb_get_tunnel_opt), \
712 FN(skb_set_tunnel_opt), \
713 FN(skb_change_proto), \
714 FN(skb_change_type), \
715 FN(skb_under_cgroup), \
716 FN(get_hash_recalc), \
717 FN(get_current_task), \
718 FN(probe_write_user), \
719 FN(current_task_under_cgroup), \
720 FN(skb_change_tail), \
723 FN(set_hash_invalid), \
724 FN(get_numa_node_id), \
725 FN(skb_change_head), \
726 FN(xdp_adjust_head), \
727 FN(probe_read_str), \
728 FN(get_socket_cookie), \
729 FN(get_socket_uid), \
732 FN(skb_adjust_room), \
734 FN(sk_redirect_map), \
735 FN(sock_map_update), \
736 FN(xdp_adjust_meta), \
737 FN(perf_event_read_value), \
738 FN(perf_prog_read_value), \
741 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
742 * function eBPF program intends to call
744 #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
746 __BPF_FUNC_MAPPER(__BPF_ENUM_FN)
751 /* All flags used by eBPF helper functions, placed here. */
753 /* BPF_FUNC_skb_store_bytes flags. */
754 #define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
755 #define BPF_F_INVALIDATE_HASH (1ULL << 1)
757 /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
758 * First 4 bits are for passing the header field size.
760 #define BPF_F_HDR_FIELD_MASK 0xfULL
762 /* BPF_FUNC_l4_csum_replace flags. */
763 #define BPF_F_PSEUDO_HDR (1ULL << 4)
764 #define BPF_F_MARK_MANGLED_0 (1ULL << 5)
765 #define BPF_F_MARK_ENFORCE (1ULL << 6)
767 /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
768 #define BPF_F_INGRESS (1ULL << 0)
770 /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
771 #define BPF_F_TUNINFO_IPV6 (1ULL << 0)
773 /* BPF_FUNC_get_stackid flags. */
774 #define BPF_F_SKIP_FIELD_MASK 0xffULL
775 #define BPF_F_USER_STACK (1ULL << 8)
776 #define BPF_F_FAST_STACK_CMP (1ULL << 9)
777 #define BPF_F_REUSE_STACKID (1ULL << 10)
779 /* BPF_FUNC_skb_set_tunnel_key flags. */
780 #define BPF_F_ZERO_CSUM_TX (1ULL << 1)
781 #define BPF_F_DONT_FRAGMENT (1ULL << 2)
783 /* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and
784 * BPF_FUNC_perf_event_read_value flags.
786 #define BPF_F_INDEX_MASK 0xffffffffULL
787 #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK
788 /* BPF_FUNC_perf_event_output for sk_buff input context. */
789 #define BPF_F_CTXLEN_MASK (0xfffffULL << 32)
791 /* Mode for BPF_FUNC_skb_adjust_room helper. */
792 enum bpf_adj_room_mode {
796 /* user accessible mirror of in-kernel sk_buff.
797 * new fields can only be added to the end of this structure
809 __u32 ingress_ifindex;
819 /* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */
821 __u32 remote_ip4; /* Stored in network byte order */
822 __u32 local_ip4; /* Stored in network byte order */
823 __u32 remote_ip6[4]; /* Stored in network byte order */
824 __u32 local_ip6[4]; /* Stored in network byte order */
825 __u32 remote_port; /* Stored in network byte order */
826 __u32 local_port; /* stored in host byte order */
832 struct bpf_tunnel_key {
836 __u32 remote_ipv6[4];
844 /* Generic BPF return codes which all BPF program types may support.
845 * The values are binary compatible with their TC_ACT_* counter-part to
846 * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
849 * XDP is handled seprately, see XDP_*.
857 /* >127 are reserved for prog type specific return codes */
869 #define XDP_PACKET_HEADROOM 256
871 /* User return codes for XDP prog type.
872 * A valid XDP program must return one of these defined values. All other
873 * return codes are reserved for future use. Unknown return codes will
874 * result in packet drops and a warning via bpf_warn_invalid_xdp_action().
884 /* user accessible metadata for XDP packet hook
885 * new fields must be added to the end of this structure
898 #define BPF_TAG_SIZE 8
900 enum bpf_prog_status {
901 BPF_PROG_STATUS_DEV_BOUND = (1 << 0),
904 struct bpf_prog_info {
907 __u8 tag[BPF_TAG_SIZE];
908 __u32 jited_prog_len;
909 __u32 xlated_prog_len;
910 __aligned_u64 jited_prog_insns;
911 __aligned_u64 xlated_prog_insns;
912 __u64 load_time; /* ns since boottime */
913 __u32 created_by_uid;
915 __aligned_u64 map_ids;
916 char name[BPF_OBJ_NAME_LEN];
919 } __attribute__((aligned(8)));
921 struct bpf_map_info {
928 char name[BPF_OBJ_NAME_LEN];
929 } __attribute__((aligned(8)));
931 /* User bpf_sock_ops struct to access socket values and specify request ops
933 * Some of this fields are in network (bigendian) byte order and may need
934 * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
935 * New fields can only be added at the end of this structure
937 struct bpf_sock_ops {
944 __u32 remote_ip4; /* Stored in network byte order */
945 __u32 local_ip4; /* Stored in network byte order */
946 __u32 remote_ip6[4]; /* Stored in network byte order */
947 __u32 local_ip6[4]; /* Stored in network byte order */
948 __u32 remote_port; /* Stored in network byte order */
949 __u32 local_port; /* stored in host byte order */
952 /* List of known BPF sock_ops operators.
953 * New entries can only be added at the end
957 BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or
958 * -1 if default value should be used
960 BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized
961 * window (in packets) or -1 if default
962 * value should be used
964 BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an
965 * active connection is initialized
967 BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an
968 * active connection is
971 BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a
972 * passive connection is
975 BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control
978 BPF_SOCK_OPS_BASE_RTT, /* Get base RTT. The correct value is
979 * based on the path and may be
980 * dependent on the congestion control
981 * algorithm. In general it indicates
982 * a congestion threshold. RTTs above
983 * this indicate congestion
987 #define TCP_BPF_IW 1001 /* Set TCP initial congestion window */
988 #define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */
990 struct bpf_perf_event_value {
996 #define BPF_DEVCG_ACC_MKNOD (1ULL << 0)
997 #define BPF_DEVCG_ACC_READ (1ULL << 1)
998 #define BPF_DEVCG_ACC_WRITE (1ULL << 2)
1000 #define BPF_DEVCG_DEV_BLOCK (1ULL << 0)
1001 #define BPF_DEVCG_DEV_CHAR (1ULL << 1)
1003 struct bpf_cgroup_dev_ctx {
1004 __u32 access_type; /* (access << 16) | type */
1009 #endif /* _UAPI__LINUX_BPF_H__ */