[mirror_ubuntu-jammy-kernel.git] / include / uapi / linux / bpf.h

/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#ifndef _UAPI__LINUX_BPF_H__
#define _UAPI__LINUX_BPF_H__

#include <linux/types.h>
#include <linux/bpf_common.h>

/* Extended instruction set based on top of classic BPF */

/* instruction classes */
#define BPF_ALU64	0x07	/* alu mode in double word width */

/* ld/ldx fields */
#define BPF_DW		0x18	/* double word */
#define BPF_XADD	0xc0	/* exclusive add */

/* alu/jmp fields */
#define BPF_MOV		0xb0	/* mov reg to reg */
#define BPF_ARSH	0xc0	/* sign extending arithmetic shift right */

/* change endianness of a register */
#define BPF_END		0xd0	/* flags for endianness conversion: */
#define BPF_TO_LE	0x00	/* convert to little-endian */
#define BPF_TO_BE	0x08	/* convert to big-endian */
#define BPF_FROM_LE	BPF_TO_LE
#define BPF_FROM_BE	BPF_TO_BE

#define BPF_JNE		0x50	/* jump != */
#define BPF_JSGT	0x60	/* SGT is signed '>', GT in x86 */
#define BPF_JSGE	0x70	/* SGE is signed '>=', GE in x86 */
#define BPF_CALL	0x80	/* function call */
#define BPF_EXIT	0x90	/* function return */

/* Register numbers */
enum {
	BPF_REG_0 = 0,
	BPF_REG_1,
	BPF_REG_2,
	BPF_REG_3,
	BPF_REG_4,
	BPF_REG_5,
	BPF_REG_6,
	BPF_REG_7,
	BPF_REG_8,
	BPF_REG_9,
	BPF_REG_10,
	__MAX_BPF_REG,
};

/* BPF has 10 general purpose 64-bit registers and stack frame. */
#define MAX_BPF_REG	__MAX_BPF_REG

struct bpf_insn {
	__u8	code;		/* opcode */
	__u8	dst_reg:4;	/* dest register */
	__u8	src_reg:4;	/* source register */
	__s16	off;		/* signed offset */
	__s32	imm;		/* signed immediate constant */
};

/* BPF syscall commands, see bpf(2) man-page for details. */
enum bpf_cmd {
	BPF_MAP_CREATE,
	BPF_MAP_LOOKUP_ELEM,
	BPF_MAP_UPDATE_ELEM,
	BPF_MAP_DELETE_ELEM,
	BPF_MAP_GET_NEXT_KEY,
	BPF_PROG_LOAD,
	BPF_OBJ_PIN,
	BPF_OBJ_GET,
};

enum bpf_map_type {
	BPF_MAP_TYPE_UNSPEC,
	BPF_MAP_TYPE_HASH,
	BPF_MAP_TYPE_ARRAY,
	BPF_MAP_TYPE_PROG_ARRAY,
	BPF_MAP_TYPE_PERF_EVENT_ARRAY,
};

enum bpf_prog_type {
	BPF_PROG_TYPE_UNSPEC,
	BPF_PROG_TYPE_SOCKET_FILTER,
	BPF_PROG_TYPE_KPROBE,
	BPF_PROG_TYPE_SCHED_CLS,
	BPF_PROG_TYPE_SCHED_ACT,
};

#define BPF_PSEUDO_MAP_FD	1

/* flags for BPF_MAP_UPDATE_ELEM command */
#define BPF_ANY		0 /* create new element or update existing */
#define BPF_NOEXIST	1 /* create new element if it didn't exist */
#define BPF_EXIST	2 /* update existing element */

union bpf_attr {
	struct { /* anonymous struct used by BPF_MAP_CREATE command */
		__u32	map_type;	/* one of enum bpf_map_type */
		__u32	key_size;	/* size of key in bytes */
		__u32	value_size;	/* size of value in bytes */
		__u32	max_entries;	/* max number of entries in a map */
	};

	struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
		__u32		map_fd;
		__aligned_u64	key;
		union {
			__aligned_u64 value;
			__aligned_u64 next_key;
		};
		__u64		flags;
	};

	struct { /* anonymous struct used by BPF_PROG_LOAD command */
		__u32		prog_type;	/* one of enum bpf_prog_type */
		__u32		insn_cnt;
		__aligned_u64	insns;
		__aligned_u64	license;
		__u32		log_level;	/* verbosity level of verifier */
		__u32		log_size;	/* size of user buffer */
		__aligned_u64	log_buf;	/* user supplied buffer */
		__u32		kern_version;	/* checked when prog_type=kprobe */
	};

	struct { /* anonymous struct used by BPF_OBJ_* commands */
		__aligned_u64	pathname;
		__u32		bpf_fd;
	};
} __attribute__((aligned(8)));

/* integer value in 'imm' field of BPF_CALL instruction selects which helper
 * function eBPF program intends to call
 */
enum bpf_func_id {
	BPF_FUNC_unspec,
	BPF_FUNC_map_lookup_elem, /* void *map_lookup_elem(&map, &key) */
	BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
	BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
	BPF_FUNC_probe_read,      /* int bpf_probe_read(void *dst, int size, void *src) */
	BPF_FUNC_ktime_get_ns,    /* u64 bpf_ktime_get_ns(void) */
	BPF_FUNC_trace_printk,    /* int bpf_trace_printk(const char *fmt, int fmt_size, ...) */
	BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
	BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */

	/**
	 * skb_store_bytes(skb, offset, from, len, flags) - store bytes into packet
	 * @skb: pointer to skb
	 * @offset: offset within packet from skb->mac_header
	 * @from: pointer where to copy bytes from
	 * @len: number of bytes to store into packet
	 * @flags: bit 0 - if true, recompute skb->csum
	 *         other bits - reserved
	 * Return: 0 on success
	 */
	BPF_FUNC_skb_store_bytes,

	/**
	 * l3_csum_replace(skb, offset, from, to, flags) - recompute IP checksum
	 * @skb: pointer to skb
	 * @offset: offset within packet where IP checksum is located
	 * @from: old value of header field
	 * @to: new value of header field
	 * @flags: bits 0-3 - size of header field
	 *         other bits - reserved
	 * Return: 0 on success
	 */
	BPF_FUNC_l3_csum_replace,

	/**
	 * l4_csum_replace(skb, offset, from, to, flags) - recompute TCP/UDP checksum
	 * @skb: pointer to skb
	 * @offset: offset within packet where TCP/UDP checksum is located
	 * @from: old value of header field
	 * @to: new value of header field
	 * @flags: bits 0-3 - size of header field
	 *         bit 4 - is pseudo header
	 *         other bits - reserved
	 * Return: 0 on success
	 */
	BPF_FUNC_l4_csum_replace,

	/**
	 * bpf_tail_call(ctx, prog_array_map, index) - jump into another BPF program
	 * @ctx: context pointer passed to next program
	 * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
	 * @index: index inside array that selects specific program to run
	 * Return: 0 on success
	 */
	BPF_FUNC_tail_call,

	/**
	 * bpf_clone_redirect(skb, ifindex, flags) - redirect to another netdev
	 * @skb: pointer to skb
	 * @ifindex: ifindex of the net device
	 * @flags: bit 0 - if set, redirect to ingress instead of egress
	 *         other bits - reserved
	 * Return: 0 on success
	 */
	BPF_FUNC_clone_redirect,

	/**
	 * u64 bpf_get_current_pid_tgid(void)
	 * Return: current->tgid << 32 | current->pid
	 */
	BPF_FUNC_get_current_pid_tgid,

	/**
	 * u64 bpf_get_current_uid_gid(void)
	 * Return: current_gid << 32 | current_uid
	 */
	BPF_FUNC_get_current_uid_gid,

	/**
	 * bpf_get_current_comm(char *buf, int size_of_buf)
	 * stores current->comm into buf
	 * Return: 0 on success
	 */
	BPF_FUNC_get_current_comm,

	/**
	 * bpf_get_cgroup_classid(skb) - retrieve a proc's classid
	 * @skb: pointer to skb
	 * Return: classid if != 0
	 */
	BPF_FUNC_get_cgroup_classid,
	BPF_FUNC_skb_vlan_push, /* bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) */
	BPF_FUNC_skb_vlan_pop,  /* bpf_skb_vlan_pop(skb) */

	/**
	 * bpf_skb_[gs]et_tunnel_key(skb, key, size, flags)
	 * retrieve or populate tunnel metadata
	 * @skb: pointer to skb
	 * @key: pointer to 'struct bpf_tunnel_key'
	 * @size: size of 'struct bpf_tunnel_key'
	 * @flags: room for future extensions
	 * Retrun: 0 on success
	 */
	BPF_FUNC_skb_get_tunnel_key,
	BPF_FUNC_skb_set_tunnel_key,
	BPF_FUNC_perf_event_read,	/* u64 bpf_perf_event_read(&map, index) */
	/**
	 * bpf_redirect(ifindex, flags) - redirect to another netdev
	 * @ifindex: ifindex of the net device
	 * @flags: bit 0 - if set, redirect to ingress instead of egress
	 *         other bits - reserved
	 * Return: TC_ACT_REDIRECT
	 */
	BPF_FUNC_redirect,

	/**
	 * bpf_get_route_realm(skb) - retrieve a dst's tclassid
	 * @skb: pointer to skb
	 * Return: realm if != 0
	 */
	BPF_FUNC_get_route_realm,

	/**
	 * bpf_perf_event_output(ctx, map, index, data, size) - output perf raw sample
	 * @ctx: struct pt_regs*
	 * @map: pointer to perf_event_array map
	 * @index: index of event in the map
	 * @data: data on stack to be output as raw data
	 * @size: size of data
	 * Return: 0 on success
	 */
	BPF_FUNC_perf_event_output,
	BPF_FUNC_skb_load_bytes,
	__BPF_FUNC_MAX_ID,
};

/* All flags used by eBPF helper functions, placed here. */

/* BPF_FUNC_skb_store_bytes flags. */
#define BPF_F_RECOMPUTE_CSUM		(1ULL << 0)

/* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
 * First 4 bits are for passing the header field size.
 */
#define BPF_F_HDR_FIELD_MASK		0xfULL

/* BPF_FUNC_l4_csum_replace flags. */
#define BPF_F_PSEUDO_HDR		(1ULL << 4)

/* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
#define BPF_F_INGRESS			(1ULL << 0)

/* user accessible mirror of in-kernel sk_buff.
 * new fields can only be added to the end of this structure
 */
struct __sk_buff {
	__u32 len;
	__u32 pkt_type;
	__u32 mark;
	__u32 queue_mapping;
	__u32 protocol;
	__u32 vlan_present;
	__u32 vlan_tci;
	__u32 vlan_proto;
	__u32 priority;
	__u32 ingress_ifindex;
	__u32 ifindex;
	__u32 tc_index;
	__u32 cb[5];
	__u32 hash;
	__u32 tc_classid;
};

struct bpf_tunnel_key {
	__u32 tunnel_id;
	__u32 remote_ipv4;
};

#endif /* _UAPI__LINUX_BPF_H__ */
Commit	Line	Data
daedfb22 AS	1	/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
	2	*
	3	* This program is free software; you can redistribute it and/or
	4	* modify it under the terms of version 2 of the GNU General Public
	5	* License as published by the Free Software Foundation.
	6	*/
	7	#ifndef _UAPI__LINUX_BPF_H__
	8	#define _UAPI__LINUX_BPF_H__
	9
	10	#include <linux/types.h>
c15952dc	11	#include <linux/bpf_common.h>
daedfb22 AS	12
	13	/* Extended instruction set based on top of classic BPF */
	14
	15	/* instruction classes */
	16	#define BPF_ALU64 0x07 /* alu mode in double word width */
	17
	18	/* ld/ldx fields */
	19	#define BPF_DW 0x18 /* double word */
	20	#define BPF_XADD 0xc0 /* exclusive add */
	21
	22	/* alu/jmp fields */
	23	#define BPF_MOV 0xb0 /* mov reg to reg */
	24	#define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */
	25
	26	/* change endianness of a register */
	27	#define BPF_END 0xd0 /* flags for endianness conversion: */
	28	#define BPF_TO_LE 0x00 /* convert to little-endian */
	29	#define BPF_TO_BE 0x08 /* convert to big-endian */
	30	#define BPF_FROM_LE BPF_TO_LE
	31	#define BPF_FROM_BE BPF_TO_BE
	32
	33	#define BPF_JNE 0x50 /* jump != */
	34	#define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */
	35	#define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */
	36	#define BPF_CALL 0x80 /* function call */
	37	#define BPF_EXIT 0x90 /* function return */
	38
	39	/* Register numbers */
	40	enum {
	41	BPF_REG_0 = 0,
	42	BPF_REG_1,
	43	BPF_REG_2,
	44	BPF_REG_3,
	45	BPF_REG_4,
	46	BPF_REG_5,
	47	BPF_REG_6,
	48	BPF_REG_7,
	49	BPF_REG_8,
	50	BPF_REG_9,
	51	BPF_REG_10,
	52	__MAX_BPF_REG,
	53	};
	54
	55	/* BPF has 10 general purpose 64-bit registers and stack frame. */
	56	#define MAX_BPF_REG __MAX_BPF_REG
	57
	58	struct bpf_insn {
	59	__u8 code; /* opcode */
	60	__u8 dst_reg:4; /* dest register */
	61	__u8 src_reg:4; /* source register */
	62	__s16 off; /* signed offset */
	63	__s32 imm; /* signed immediate constant */
	64	};
	65
b2197755	66	/* BPF syscall commands, see bpf(2) man-page for details. */
99c55f7d	67	enum bpf_cmd {
99c55f7d	68	BPF_MAP_CREATE,
db20fd2b	69	BPF_MAP_LOOKUP_ELEM,
db20fd2b	70	BPF_MAP_UPDATE_ELEM,
db20fd2b	71	BPF_MAP_DELETE_ELEM,
db20fd2b	72	BPF_MAP_GET_NEXT_KEY,
09756af4	73	BPF_PROG_LOAD,
b2197755 DB	74	BPF_OBJ_PIN,
b2197755 DB	75	BPF_OBJ_GET,
99c55f7d AS	76	};
	77
	78	enum bpf_map_type {
	79	BPF_MAP_TYPE_UNSPEC,
0f8e4bd8	80	BPF_MAP_TYPE_HASH,
28fbcfa0	81	BPF_MAP_TYPE_ARRAY,
04fd61ab	82	BPF_MAP_TYPE_PROG_ARRAY,
ea317b26	83	BPF_MAP_TYPE_PERF_EVENT_ARRAY,
99c55f7d AS	84	};
99c55f7d AS	85
09756af4 AS	86	enum bpf_prog_type {
09756af4 AS	87	BPF_PROG_TYPE_UNSPEC,
ddd872bc	88	BPF_PROG_TYPE_SOCKET_FILTER,
2541517c	89	BPF_PROG_TYPE_KPROBE,
96be4325	90	BPF_PROG_TYPE_SCHED_CLS,
94caee8c	91	BPF_PROG_TYPE_SCHED_ACT,
09756af4 AS	92	};
09756af4 AS	93
f1a66f85 DB	94	#define BPF_PSEUDO_MAP_FD 1
f1a66f85 DB	95
3274f520 AS	96	/* flags for BPF_MAP_UPDATE_ELEM command */
	97	#define BPF_ANY 0 /* create new element or update existing */
	98	#define BPF_NOEXIST 1 /* create new element if it didn't exist */
	99	#define BPF_EXIST 2 /* update existing element */
	100
99c55f7d AS	101	union bpf_attr {
	102	struct { /* anonymous struct used by BPF_MAP_CREATE command */
	103	__u32 map_type; /* one of enum bpf_map_type */
	104	__u32 key_size; /* size of key in bytes */
	105	__u32 value_size; /* size of value in bytes */
	106	__u32 max_entries; /* max number of entries in a map */
	107	};
db20fd2b AS	108
	109	struct { /* anonymous struct used by BPF_MAP__ELEM commands /
	110	__u32 map_fd;
	111	__aligned_u64 key;
	112	union {
	113	__aligned_u64 value;
	114	__aligned_u64 next_key;
	115	};
3274f520	116	__u64 flags;
db20fd2b	117	};
09756af4 AS	118
	119	struct { /* anonymous struct used by BPF_PROG_LOAD command */
	120	__u32 prog_type; /* one of enum bpf_prog_type */
	121	__u32 insn_cnt;
	122	__aligned_u64 insns;
	123	__aligned_u64 license;
cbd35700 AS	124	__u32 log_level; /* verbosity level of verifier */
	125	__u32 log_size; /* size of user buffer */
	126	__aligned_u64 log_buf; /* user supplied buffer */
2541517c	127	__u32 kern_version; /* checked when prog_type=kprobe */
09756af4	128	};
b2197755 DB	129
	130	struct { /* anonymous struct used by BPF_OBJ_* commands */
	131	__aligned_u64 pathname;
	132	__u32 bpf_fd;
	133	};
99c55f7d AS	134	} __attribute__((aligned(8)));
99c55f7d AS	135
09756af4 AS	136	/* integer value in 'imm' field of BPF_CALL instruction selects which helper
	137	* function eBPF program intends to call
	138	*/
	139	enum bpf_func_id {
	140	BPF_FUNC_unspec,
d0003ec0 AS	141	BPF_FUNC_map_lookup_elem, /* void map_lookup_elem(&map, &key) /
	142	BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
	143	BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
2541517c	144	BPF_FUNC_probe_read, /* int bpf_probe_read(void dst, int size, void src) */
d9847d31	145	BPF_FUNC_ktime_get_ns, /* u64 bpf_ktime_get_ns(void) */
9c959c86	146	BPF_FUNC_trace_printk, /* int bpf_trace_printk(const char fmt, int fmt_size, ...) /
03e69b50	147	BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
c04167ce	148	BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */
91bc4822 AS	149
	150	/**
	151	* skb_store_bytes(skb, offset, from, len, flags) - store bytes into packet
	152	* @skb: pointer to skb
a166151c	153	* @offset: offset within packet from skb->mac_header
91bc4822 AS	154	* @from: pointer where to copy bytes from
	155	* @len: number of bytes to store into packet
	156	* @flags: bit 0 - if true, recompute skb->csum
	157	* other bits - reserved
	158	* Return: 0 on success
	159	*/
	160	BPF_FUNC_skb_store_bytes,
	161
	162	/**
	163	* l3_csum_replace(skb, offset, from, to, flags) - recompute IP checksum
	164	* @skb: pointer to skb
	165	* @offset: offset within packet where IP checksum is located
	166	* @from: old value of header field
	167	* @to: new value of header field
	168	* @flags: bits 0-3 - size of header field
	169	* other bits - reserved
	170	* Return: 0 on success
	171	*/
	172	BPF_FUNC_l3_csum_replace,
	173
	174	/**
	175	* l4_csum_replace(skb, offset, from, to, flags) - recompute TCP/UDP checksum
	176	* @skb: pointer to skb
	177	* @offset: offset within packet where TCP/UDP checksum is located
	178	* @from: old value of header field
	179	* @to: new value of header field
	180	* @flags: bits 0-3 - size of header field
	181	* bit 4 - is pseudo header
	182	* other bits - reserved
	183	* Return: 0 on success
	184	*/
	185	BPF_FUNC_l4_csum_replace,
04fd61ab AS	186
	187	/**
	188	* bpf_tail_call(ctx, prog_array_map, index) - jump into another BPF program
	189	* @ctx: context pointer passed to next program
	190	* @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
	191	* @index: index inside array that selects specific program to run
	192	* Return: 0 on success
	193	*/
	194	BPF_FUNC_tail_call,
3896d655 AS	195
	196	/**
	197	* bpf_clone_redirect(skb, ifindex, flags) - redirect to another netdev
	198	* @skb: pointer to skb
	199	* @ifindex: ifindex of the net device
	200	* @flags: bit 0 - if set, redirect to ingress instead of egress
	201	* other bits - reserved
	202	* Return: 0 on success
	203	*/
	204	BPF_FUNC_clone_redirect,
ffeedafb AS	205
	206	/**
	207	* u64 bpf_get_current_pid_tgid(void)
	208	* Return: current->tgid << 32 \| current->pid
	209	*/
	210	BPF_FUNC_get_current_pid_tgid,
	211
	212	/**
	213	* u64 bpf_get_current_uid_gid(void)
	214	* Return: current_gid << 32 \| current_uid
	215	*/
	216	BPF_FUNC_get_current_uid_gid,
	217
	218	/**
	219	* bpf_get_current_comm(char *buf, int size_of_buf)
	220	* stores current->comm into buf
	221	* Return: 0 on success
	222	*/
	223	BPF_FUNC_get_current_comm,
8d20aabe DB	224
	225	/**
	226	* bpf_get_cgroup_classid(skb) - retrieve a proc's classid
	227	* @skb: pointer to skb
	228	* Return: classid if != 0
	229	*/
	230	BPF_FUNC_get_cgroup_classid,
4e10df9a AS	231	BPF_FUNC_skb_vlan_push, /* bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) */
4e10df9a AS	232	BPF_FUNC_skb_vlan_pop, /* bpf_skb_vlan_pop(skb) */
d3aa45ce AS	233
	234	/**
	235	* bpf_skb_[gs]et_tunnel_key(skb, key, size, flags)
	236	* retrieve or populate tunnel metadata
	237	* @skb: pointer to skb
	238	* @key: pointer to 'struct bpf_tunnel_key'
	239	* @size: size of 'struct bpf_tunnel_key'
	240	* @flags: room for future extensions
	241	* Retrun: 0 on success
	242	*/
	243	BPF_FUNC_skb_get_tunnel_key,
	244	BPF_FUNC_skb_set_tunnel_key,
35578d79	245	BPF_FUNC_perf_event_read, /* u64 bpf_perf_event_read(&map, index) */
27b29f63 AS	246	/**
	247	* bpf_redirect(ifindex, flags) - redirect to another netdev
	248	* @ifindex: ifindex of the net device
	249	* @flags: bit 0 - if set, redirect to ingress instead of egress
	250	* other bits - reserved
	251	* Return: TC_ACT_REDIRECT
	252	*/
	253	BPF_FUNC_redirect,
c46646d0 DB	254
	255	/**
	256	* bpf_get_route_realm(skb) - retrieve a dst's tclassid
	257	* @skb: pointer to skb
	258	* Return: realm if != 0
	259	*/
	260	BPF_FUNC_get_route_realm,
a43eec30 AS	261
	262	/**
	263	* bpf_perf_event_output(ctx, map, index, data, size) - output perf raw sample
	264	* @ctx: struct pt_regs*
	265	* @map: pointer to perf_event_array map
	266	* @index: index of event in the map
	267	* @data: data on stack to be output as raw data
	268	* @size: size of data
	269	* Return: 0 on success
	270	*/
	271	BPF_FUNC_perf_event_output,
05c74e5e	272	BPF_FUNC_skb_load_bytes,
09756af4 AS	273	__BPF_FUNC_MAX_ID,
	274	};
	275
781c53bc DB	276	/* All flags used by eBPF helper functions, placed here. */
	277
	278	/* BPF_FUNC_skb_store_bytes flags. */
	279	#define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
	280
	281	/* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
	282	* First 4 bits are for passing the header field size.
	283	*/
	284	#define BPF_F_HDR_FIELD_MASK 0xfULL
	285
	286	/* BPF_FUNC_l4_csum_replace flags. */
	287	#define BPF_F_PSEUDO_HDR (1ULL << 4)
	288
	289	/* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
	290	#define BPF_F_INGRESS (1ULL << 0)
	291
9bac3d6d AS	292	/* user accessible mirror of in-kernel sk_buff.
	293	* new fields can only be added to the end of this structure
	294	*/
	295	struct __sk_buff {
	296	__u32 len;
	297	__u32 pkt_type;
	298	__u32 mark;
	299	__u32 queue_mapping;
c2497395 AS	300	__u32 protocol;
	301	__u32 vlan_present;
	302	__u32 vlan_tci;
27cd5452	303	__u32 vlan_proto;
bcad5718	304	__u32 priority;
37e82c2f AS	305	__u32 ingress_ifindex;
37e82c2f AS	306	__u32 ifindex;
d691f9e8 AS	307	__u32 tc_index;
d691f9e8 AS	308	__u32 cb[5];
ba7591d8	309	__u32 hash;
045efa82	310	__u32 tc_classid;
9bac3d6d AS	311	};
9bac3d6d AS	312
d3aa45ce AS	313	struct bpf_tunnel_key {
	314	__u32 tunnel_id;
	315	__u32 remote_ipv4;
	316	};
	317
daedfb22	318	#endif /* _UAPI__LINUX_BPF_H__ */