include/uapi/linux/bpf.h - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /* 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 */
 enum bpf_cmd {
 	/* create a map with given type and attributes
 	 * fd = bpf(BPF_MAP_CREATE, union bpf_attr *, u32 size)
 	 * returns fd or negative error
 	 * map is deleted when fd is closed
 	 */
 	BPF_MAP_CREATE,

 	/* lookup key in a given map
 	 * err = bpf(BPF_MAP_LOOKUP_ELEM, union bpf_attr *attr, u32 size)
 	 * Using attr->map_fd, attr->key, attr->value
 	 * returns zero and stores found elem into value
 	 * or negative error
 	 */
 	BPF_MAP_LOOKUP_ELEM,

 	/* create or update key/value pair in a given map
 	 * err = bpf(BPF_MAP_UPDATE_ELEM, union bpf_attr *attr, u32 size)
 	 * Using attr->map_fd, attr->key, attr->value, attr->flags
 	 * returns zero or negative error
 	 */
 	BPF_MAP_UPDATE_ELEM,

 	/* find and delete elem by key in a given map
 	 * err = bpf(BPF_MAP_DELETE_ELEM, union bpf_attr *attr, u32 size)
 	 * Using attr->map_fd, attr->key
 	 * returns zero or negative error
 	 */
 	BPF_MAP_DELETE_ELEM,

 	/* lookup key in a given map and return next key
 	 * err = bpf(BPF_MAP_GET_NEXT_KEY, union bpf_attr *attr, u32 size)
 	 * Using attr->map_fd, attr->key, attr->next_key
 	 * returns zero and stores next key or negative error
 	 */
 	BPF_MAP_GET_NEXT_KEY,

 	/* verify and load eBPF program
 	 * prog_fd = bpf(BPF_PROG_LOAD, union bpf_attr *attr, u32 size)
 	 * Using attr->prog_type, attr->insns, attr->license
 	 * returns fd or negative error
 	 */
 	BPF_PROG_LOAD,
 };

 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 */
 	};
 } __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_FUNC_MAX_ID,
 };

 /* 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;
 };

 struct bpf_tunnel_key {
 	__u32 tunnel_id;
 	__u32 remote_ipv4;
 };

 #endif /* _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 */
	enum bpf_cmd {
	/* create a map with given type and attributes
	* fd = bpf(BPF_MAP_CREATE, union bpf_attr *, u32 size)
	* returns fd or negative error
	* map is deleted when fd is closed
	*/
	BPF_MAP_CREATE,

	/* lookup key in a given map
	* err = bpf(BPF_MAP_LOOKUP_ELEM, union bpf_attr *attr, u32 size)
	* Using attr->map_fd, attr->key, attr->value
	* returns zero and stores found elem into value
	* or negative error
	*/
	BPF_MAP_LOOKUP_ELEM,

	/* create or update key/value pair in a given map
	* err = bpf(BPF_MAP_UPDATE_ELEM, union bpf_attr *attr, u32 size)
	* Using attr->map_fd, attr->key, attr->value, attr->flags
	* returns zero or negative error
	*/
	BPF_MAP_UPDATE_ELEM,

	/* find and delete elem by key in a given map
	* err = bpf(BPF_MAP_DELETE_ELEM, union bpf_attr *attr, u32 size)
	* Using attr->map_fd, attr->key
	* returns zero or negative error
	*/
	BPF_MAP_DELETE_ELEM,

	/* lookup key in a given map and return next key
	* err = bpf(BPF_MAP_GET_NEXT_KEY, union bpf_attr *attr, u32 size)
	* Using attr->map_fd, attr->key, attr->next_key
	* returns zero and stores next key or negative error
	*/
	BPF_MAP_GET_NEXT_KEY,

	/* verify and load eBPF program
	* prog_fd = bpf(BPF_PROG_LOAD, union bpf_attr *attr, u32 size)
	* Using attr->prog_type, attr->insns, attr->license
	* returns fd or negative error
	*/
	BPF_PROG_LOAD,
	};

	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 */
	};
	} __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_FUNC_MAX_ID,
	};

	/* 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;
	};

	struct bpf_tunnel_key {
	__u32 tunnel_id;
	__u32 remote_ipv4;
	};

	#endif /* _UAPI__LINUX_BPF_H__ */