[mirror_iproute2.git] / include / 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 __LINUX_BPF_H__
#define __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,
	BPF_MAP_TYPE_PERCPU_HASH,
	BPF_MAP_TYPE_PERCPU_ARRAY,
	BPF_MAP_TYPE_STACK_TRACE,
};

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 */

#define BPF_F_NO_PREALLOC	(1U << 0)

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 */
		__u32	map_flags;	/* prealloc or not */
	};

	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_get_stackid(ctx, map, flags) - walk user or kernel stack and return id
	 * @ctx: struct pt_regs*
	 * @map: pointer to stack_trace map
	 * @flags: bits 0-7 - numer of stack frames to skip
	 *         bit 8 - collect user stack instead of kernel
	 *         bit 9 - compare stacks by hash only
	 *         bit 10 - if two different stacks hash into the same stackid
	 *                  discard old
	 *         other bits - reserved
	 * Return: >= 0 stackid on success or negative error
	 */
	BPF_FUNC_get_stackid,

	/**
	 * bpf_csum_diff(from, from_size, to, to_size, seed) - calculate csum diff
	 * @from: raw from buffer
	 * @from_size: length of from buffer
	 * @to: raw to buffer
	 * @to_size: length of to buffer
	 * @seed: optional seed
	 * Return: csum result
	 */
	BPF_FUNC_csum_diff,

	/**
	 * bpf_skb_[gs]et_tunnel_opt(skb, opt, size)
	 * retrieve or populate tunnel options metadata
	 * @skb: pointer to skb
	 * @opt: pointer to raw tunnel option data
	 * @size: size of @opt
	 * Return: 0 on success for set, option size for get
	 */
	BPF_FUNC_skb_get_tunnel_opt,
	BPF_FUNC_skb_set_tunnel_opt,
	__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)
#define BPF_F_INVALIDATE_HASH		(1ULL << 1)

/* 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)
#define BPF_F_MARK_MANGLED_0		(1ULL << 5)

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

/* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
#define BPF_F_TUNINFO_IPV6		(1ULL << 0)

/* BPF_FUNC_get_stackid flags. */
#define BPF_F_SKIP_FIELD_MASK		0xffULL
#define BPF_F_USER_STACK		(1ULL << 8)
#define BPF_F_FAST_STACK_CMP		(1ULL << 9)
#define BPF_F_REUSE_STACKID		(1ULL << 10)

/* BPF_FUNC_skb_set_tunnel_key flags. */
#define BPF_F_ZERO_CSUM_TX		(1ULL << 1)
#define BPF_F_DONT_FRAGMENT		(1ULL << 2)

/* 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;
	union {
		__u32 remote_ipv4;
		__u32 remote_ipv6[4];
	};
	__u8 tunnel_tos;
	__u8 tunnel_ttl;
	__u16 tunnel_ext;
	__u32 tunnel_label;
};

#endif /* __LINUX_BPF_H__ */
Commit	Line	Data
b54ac87e DB	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 __LINUX_BPF_H__
	8	#define __LINUX_BPF_H__
	9
	10	#include <linux/types.h>
	11	#include <linux/bpf_common.h>
	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
0198930b	66	/* BPF syscall commands, see bpf(2) man-page for details. */
b54ac87e	67	enum bpf_cmd {
b54ac87e	68	BPF_MAP_CREATE,
b54ac87e	69	BPF_MAP_LOOKUP_ELEM,
b54ac87e	70	BPF_MAP_UPDATE_ELEM,
b54ac87e	71	BPF_MAP_DELETE_ELEM,
b54ac87e	72	BPF_MAP_GET_NEXT_KEY,
b54ac87e	73	BPF_PROG_LOAD,
0198930b SH	74	BPF_OBJ_PIN,
0198930b SH	75	BPF_OBJ_GET,
b54ac87e DB	76	};
	77
	78	enum bpf_map_type {
	79	BPF_MAP_TYPE_UNSPEC,
	80	BPF_MAP_TYPE_HASH,
	81	BPF_MAP_TYPE_ARRAY,
8f42ceaf	82	BPF_MAP_TYPE_PROG_ARRAY,
4f3489cd	83	BPF_MAP_TYPE_PERF_EVENT_ARRAY,
8593b2ca SH	84	BPF_MAP_TYPE_PERCPU_HASH,
8593b2ca SH	85	BPF_MAP_TYPE_PERCPU_ARRAY,
2421ab75	86	BPF_MAP_TYPE_STACK_TRACE,
b54ac87e DB	87	};
	88
	89	enum bpf_prog_type {
	90	BPF_PROG_TYPE_UNSPEC,
	91	BPF_PROG_TYPE_SOCKET_FILTER,
aeedd8e1	92	BPF_PROG_TYPE_KPROBE,
b54ac87e	93	BPF_PROG_TYPE_SCHED_CLS,
cbdc3ed8	94	BPF_PROG_TYPE_SCHED_ACT,
b54ac87e DB	95	};
	96
	97	#define BPF_PSEUDO_MAP_FD 1
	98
	99	/* flags for BPF_MAP_UPDATE_ELEM command */
	100	#define BPF_ANY 0 /* create new element or update existing */
	101	#define BPF_NOEXIST 1 /* create new element if it didn't exist */
	102	#define BPF_EXIST 2 /* update existing element */
	103
b7e0091a SH	104	#define BPF_F_NO_PREALLOC (1U << 0)
b7e0091a SH	105
b54ac87e DB	106	union bpf_attr {
	107	struct { /* anonymous struct used by BPF_MAP_CREATE command */
	108	__u32 map_type; /* one of enum bpf_map_type */
	109	__u32 key_size; /* size of key in bytes */
	110	__u32 value_size; /* size of value in bytes */
	111	__u32 max_entries; /* max number of entries in a map */
b7e0091a	112	__u32 map_flags; /* prealloc or not */
b54ac87e DB	113	};
	114
	115	struct { /* anonymous struct used by BPF_MAP__ELEM commands /
	116	__u32 map_fd;
	117	__aligned_u64 key;
	118	union {
	119	__aligned_u64 value;
	120	__aligned_u64 next_key;
	121	};
	122	__u64 flags;
	123	};
	124
	125	struct { /* anonymous struct used by BPF_PROG_LOAD command */
	126	__u32 prog_type; /* one of enum bpf_prog_type */
	127	__u32 insn_cnt;
	128	__aligned_u64 insns;
	129	__aligned_u64 license;
	130	__u32 log_level; /* verbosity level of verifier */
	131	__u32 log_size; /* size of user buffer */
	132	__aligned_u64 log_buf; /* user supplied buffer */
aeedd8e1	133	__u32 kern_version; /* checked when prog_type=kprobe */
b54ac87e	134	};
0198930b SH	135
	136	struct { /* anonymous struct used by BPF_OBJ_* commands */
	137	__aligned_u64 pathname;
	138	__u32 bpf_fd;
	139	};
b54ac87e DB	140	} __attribute__((aligned(8)));
	141
	142	/* integer value in 'imm' field of BPF_CALL instruction selects which helper
	143	* function eBPF program intends to call
	144	*/
	145	enum bpf_func_id {
	146	BPF_FUNC_unspec,
	147	BPF_FUNC_map_lookup_elem, /* void map_lookup_elem(&map, &key) /
	148	BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
	149	BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
aeedd8e1 SH	150	BPF_FUNC_probe_read, /* int bpf_probe_read(void dst, int size, void src) */
	151	BPF_FUNC_ktime_get_ns, /* u64 bpf_ktime_get_ns(void) */
	152	BPF_FUNC_trace_printk, /* int bpf_trace_printk(const char fmt, int fmt_size, ...) /
b54ac87e DB	153	BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
b54ac87e DB	154	BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */
e46efaed SH	155
	156	/**
	157	* skb_store_bytes(skb, offset, from, len, flags) - store bytes into packet
	158	* @skb: pointer to skb
aeedd8e1	159	* @offset: offset within packet from skb->mac_header
e46efaed SH	160	* @from: pointer where to copy bytes from
	161	* @len: number of bytes to store into packet
	162	* @flags: bit 0 - if true, recompute skb->csum
	163	* other bits - reserved
	164	* Return: 0 on success
	165	*/
	166	BPF_FUNC_skb_store_bytes,
	167
	168	/**
	169	* l3_csum_replace(skb, offset, from, to, flags) - recompute IP checksum
	170	* @skb: pointer to skb
	171	* @offset: offset within packet where IP checksum is located
	172	* @from: old value of header field
	173	* @to: new value of header field
	174	* @flags: bits 0-3 - size of header field
	175	* other bits - reserved
	176	* Return: 0 on success
	177	*/
	178	BPF_FUNC_l3_csum_replace,
	179
	180	/**
	181	* l4_csum_replace(skb, offset, from, to, flags) - recompute TCP/UDP checksum
	182	* @skb: pointer to skb
	183	* @offset: offset within packet where TCP/UDP checksum is located
	184	* @from: old value of header field
	185	* @to: new value of header field
	186	* @flags: bits 0-3 - size of header field
	187	* bit 4 - is pseudo header
	188	* other bits - reserved
	189	* Return: 0 on success
	190	*/
	191	BPF_FUNC_l4_csum_replace,
8f42ceaf SH	192
	193	/**
	194	* bpf_tail_call(ctx, prog_array_map, index) - jump into another BPF program
	195	* @ctx: context pointer passed to next program
	196	* @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
	197	* @index: index inside array that selects specific program to run
	198	* Return: 0 on success
	199	*/
	200	BPF_FUNC_tail_call,
ff631c3a SH	201
	202	/**
	203	* bpf_clone_redirect(skb, ifindex, flags) - redirect to another netdev
	204	* @skb: pointer to skb
	205	* @ifindex: ifindex of the net device
	206	* @flags: bit 0 - if set, redirect to ingress instead of egress
	207	* other bits - reserved
	208	* Return: 0 on success
	209	*/
	210	BPF_FUNC_clone_redirect,
	211
	212	/**
	213	* u64 bpf_get_current_pid_tgid(void)
	214	* Return: current->tgid << 32 \| current->pid
	215	*/
	216	BPF_FUNC_get_current_pid_tgid,
	217
	218	/**
	219	* u64 bpf_get_current_uid_gid(void)
	220	* Return: current_gid << 32 \| current_uid
	221	*/
	222	BPF_FUNC_get_current_uid_gid,
	223
	224	/**
	225	* bpf_get_current_comm(char *buf, int size_of_buf)
	226	* stores current->comm into buf
	227	* Return: 0 on success
	228	*/
	229	BPF_FUNC_get_current_comm,
a3563ede SH	230
	231	/**
	232	* bpf_get_cgroup_classid(skb) - retrieve a proc's classid
	233	* @skb: pointer to skb
	234	* Return: classid if != 0
	235	*/
	236	BPF_FUNC_get_cgroup_classid,
	237	BPF_FUNC_skb_vlan_push, /* bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) */
	238	BPF_FUNC_skb_vlan_pop, /* bpf_skb_vlan_pop(skb) */
089d93d6 SH	239
	240	/**
	241	* bpf_skb_[gs]et_tunnel_key(skb, key, size, flags)
	242	* retrieve or populate tunnel metadata
	243	* @skb: pointer to skb
	244	* @key: pointer to 'struct bpf_tunnel_key'
	245	* @size: size of 'struct bpf_tunnel_key'
	246	* @flags: room for future extensions
	247	* Retrun: 0 on success
	248	*/
	249	BPF_FUNC_skb_get_tunnel_key,
	250	BPF_FUNC_skb_set_tunnel_key,
4f3489cd	251	BPF_FUNC_perf_event_read, /* u64 bpf_perf_event_read(&map, index) */
4e39bfb9 SH	252	/**
	253	* bpf_redirect(ifindex, flags) - redirect to another netdev
	254	* @ifindex: ifindex of the net device
	255	* @flags: bit 0 - if set, redirect to ingress instead of egress
	256	* other bits - reserved
	257	* Return: TC_ACT_REDIRECT
	258	*/
	259	BPF_FUNC_redirect,
23e90509 SH	260
	261	/**
	262	* bpf_get_route_realm(skb) - retrieve a dst's tclassid
	263	* @skb: pointer to skb
	264	* Return: realm if != 0
	265	*/
	266	BPF_FUNC_get_route_realm,
c518d3a7 SH	267
	268	/**
	269	* bpf_perf_event_output(ctx, map, index, data, size) - output perf raw sample
	270	* @ctx: struct pt_regs*
	271	* @map: pointer to perf_event_array map
	272	* @index: index of event in the map
	273	* @data: data on stack to be output as raw data
	274	* @size: size of data
	275	* Return: 0 on success
	276	*/
	277	BPF_FUNC_perf_event_output,
a4c89d80	278	BPF_FUNC_skb_load_bytes,
2421ab75 SH	279
	280	/**
	281	* bpf_get_stackid(ctx, map, flags) - walk user or kernel stack and return id
	282	* @ctx: struct pt_regs*
	283	* @map: pointer to stack_trace map
	284	* @flags: bits 0-7 - numer of stack frames to skip
	285	* bit 8 - collect user stack instead of kernel
	286	* bit 9 - compare stacks by hash only
	287	* bit 10 - if two different stacks hash into the same stackid
	288	* discard old
	289	* other bits - reserved
	290	* Return: >= 0 stackid on success or negative error
	291	*/
	292	BPF_FUNC_get_stackid,
	293
	294	/**
	295	* bpf_csum_diff(from, from_size, to, to_size, seed) - calculate csum diff
	296	* @from: raw from buffer
	297	* @from_size: length of from buffer
	298	* @to: raw to buffer
	299	* @to_size: length of to buffer
	300	* @seed: optional seed
	301	* Return: csum result
	302	*/
	303	BPF_FUNC_csum_diff,
b7e0091a SH	304
	305	/**
	306	* bpf_skb_[gs]et_tunnel_opt(skb, opt, size)
	307	* retrieve or populate tunnel options metadata
	308	* @skb: pointer to skb
	309	* @opt: pointer to raw tunnel option data
	310	* @size: size of @opt
	311	* Return: 0 on success for set, option size for get
	312	*/
	313	BPF_FUNC_skb_get_tunnel_opt,
	314	BPF_FUNC_skb_set_tunnel_opt,
b54ac87e DB	315	__BPF_FUNC_MAX_ID,
	316	};
	317
7321b7db SH	318	/* All flags used by eBPF helper functions, placed here. */
	319
	320	/* BPF_FUNC_skb_store_bytes flags. */
	321	#define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
b7e0091a	322	#define BPF_F_INVALIDATE_HASH (1ULL << 1)
7321b7db SH	323
	324	/* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
	325	* First 4 bits are for passing the header field size.
	326	*/
	327	#define BPF_F_HDR_FIELD_MASK 0xfULL
	328
	329	/* BPF_FUNC_l4_csum_replace flags. */
	330	#define BPF_F_PSEUDO_HDR (1ULL << 4)
2421ab75	331	#define BPF_F_MARK_MANGLED_0 (1ULL << 5)
7321b7db SH	332
	333	/* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
	334	#define BPF_F_INGRESS (1ULL << 0)
	335
	336	/* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
	337	#define BPF_F_TUNINFO_IPV6 (1ULL << 0)
	338
2421ab75 SH	339	/* BPF_FUNC_get_stackid flags. */
	340	#define BPF_F_SKIP_FIELD_MASK 0xffULL
	341	#define BPF_F_USER_STACK (1ULL << 8)
	342	#define BPF_F_FAST_STACK_CMP (1ULL << 9)
	343	#define BPF_F_REUSE_STACKID (1ULL << 10)
	344
b7e0091a SH	345	/* BPF_FUNC_skb_set_tunnel_key flags. */
	346	#define BPF_F_ZERO_CSUM_TX (1ULL << 1)
	347	#define BPF_F_DONT_FRAGMENT (1ULL << 2)
	348
b54ac87e DB	349	/* user accessible mirror of in-kernel sk_buff.
	350	* new fields can only be added to the end of this structure
	351	*/
	352	struct __sk_buff {
	353	__u32 len;
	354	__u32 pkt_type;
	355	__u32 mark;
	356	__u32 queue_mapping;
cbdc3ed8 SH	357	__u32 protocol;
	358	__u32 vlan_present;
	359	__u32 vlan_tci;
	360	__u32 vlan_proto;
e46efaed	361	__u32 priority;
ff631c3a SH	362	__u32 ingress_ifindex;
	363	__u32 ifindex;
	364	__u32 tc_index;
	365	__u32 cb[5];
4f3489cd	366	__u32 hash;
4e39bfb9	367	__u32 tc_classid;
b54ac87e DB	368	};
b54ac87e DB	369
089d93d6 SH	370	struct bpf_tunnel_key {
089d93d6 SH	371	__u32 tunnel_id;
7321b7db SH	372	union {
	373	__u32 remote_ipv4;
	374	__u32 remote_ipv6[4];
	375	};
	376	__u8 tunnel_tos;
	377	__u8 tunnel_ttl;
6268b08c	378	__u16 tunnel_ext;
b7e0091a	379	__u32 tunnel_label;
089d93d6 SH	380	};
089d93d6 SH	381
b54ac87e	382	#endif /* __LINUX_BPF_H__ */