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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* 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

/* jmp encodings */
#define BPF_JNE		0x50	/* jump != */
#define BPF_JLT		0xa0	/* LT is unsigned, '<' */
#define BPF_JLE		0xb0	/* LE is unsigned, '<=' */
#define BPF_JSGT	0x60	/* SGT is signed '>', GT in x86 */
#define BPF_JSGE	0x70	/* SGE is signed '>=', GE in x86 */
#define BPF_JSLT	0xc0	/* SLT is signed, '<' */
#define BPF_JSLE	0xd0	/* SLE is signed, '<=' */
#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 */
};

/* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
struct bpf_lpm_trie_key {
	__u32	prefixlen;	/* up to 32 for AF_INET, 128 for AF_INET6 */
	__u8	data[0];	/* Arbitrary size */
};

/* 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,
	BPF_PROG_ATTACH,
	BPF_PROG_DETACH,
	BPF_PROG_TEST_RUN,
	BPF_PROG_GET_NEXT_ID,
	BPF_MAP_GET_NEXT_ID,
	BPF_PROG_GET_FD_BY_ID,
	BPF_MAP_GET_FD_BY_ID,
	BPF_OBJ_GET_INFO_BY_FD,
	BPF_PROG_QUERY,
};

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,
	BPF_MAP_TYPE_CGROUP_ARRAY,
	BPF_MAP_TYPE_LRU_HASH,
	BPF_MAP_TYPE_LRU_PERCPU_HASH,
	BPF_MAP_TYPE_LPM_TRIE,
	BPF_MAP_TYPE_ARRAY_OF_MAPS,
	BPF_MAP_TYPE_HASH_OF_MAPS,
	BPF_MAP_TYPE_DEVMAP,
	BPF_MAP_TYPE_SOCKMAP,
	BPF_MAP_TYPE_CPUMAP,
};

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,
	BPF_PROG_TYPE_TRACEPOINT,
	BPF_PROG_TYPE_XDP,
	BPF_PROG_TYPE_PERF_EVENT,
	BPF_PROG_TYPE_CGROUP_SKB,
	BPF_PROG_TYPE_CGROUP_SOCK,
	BPF_PROG_TYPE_LWT_IN,
	BPF_PROG_TYPE_LWT_OUT,
	BPF_PROG_TYPE_LWT_XMIT,
	BPF_PROG_TYPE_SOCK_OPS,
	BPF_PROG_TYPE_SK_SKB,
	BPF_PROG_TYPE_CGROUP_DEVICE,
};

enum bpf_attach_type {
	BPF_CGROUP_INET_INGRESS,
	BPF_CGROUP_INET_EGRESS,
	BPF_CGROUP_INET_SOCK_CREATE,
	BPF_CGROUP_SOCK_OPS,
	BPF_SK_SKB_STREAM_PARSER,
	BPF_SK_SKB_STREAM_VERDICT,
	BPF_CGROUP_DEVICE,
	__MAX_BPF_ATTACH_TYPE
};

#define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE

/* cgroup-bpf attach flags used in BPF_PROG_ATTACH command
 *
 * NONE(default): No further bpf programs allowed in the subtree.
 *
 * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program,
 * the program in this cgroup yields to sub-cgroup program.
 *
 * BPF_F_ALLOW_MULTI: If a sub-cgroup installs some bpf program,
 * that cgroup program gets run in addition to the program in this cgroup.
 *
 * Only one program is allowed to be attached to a cgroup with
 * NONE or BPF_F_ALLOW_OVERRIDE flag.
 * Attaching another program on top of NONE or BPF_F_ALLOW_OVERRIDE will
 * release old program and attach the new one. Attach flags has to match.
 *
 * Multiple programs are allowed to be attached to a cgroup with
 * BPF_F_ALLOW_MULTI flag. They are executed in FIFO order
 * (those that were attached first, run first)
 * The programs of sub-cgroup are executed first, then programs of
 * this cgroup and then programs of parent cgroup.
 * When children program makes decision (like picking TCP CA or sock bind)
 * parent program has a chance to override it.
 *
 * A cgroup with MULTI or OVERRIDE flag allows any attach flags in sub-cgroups.
 * A cgroup with NONE doesn't allow any programs in sub-cgroups.
 * Ex1:
 * cgrp1 (MULTI progs A, B) ->
 *    cgrp2 (OVERRIDE prog C) ->
 *      cgrp3 (MULTI prog D) ->
 *        cgrp4 (OVERRIDE prog E) ->
 *          cgrp5 (NONE prog F)
 * the event in cgrp5 triggers execution of F,D,A,B in that order.
 * if prog F is detached, the execution is E,D,A,B
 * if prog F and D are detached, the execution is E,A,B
 * if prog F, E and D are detached, the execution is C,A,B
 *
 * All eligible programs are executed regardless of return code from
 * earlier programs.
 */
#define BPF_F_ALLOW_OVERRIDE	(1U << 0)
#define BPF_F_ALLOW_MULTI	(1U << 1)

/* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the
 * verifier will perform strict alignment checking as if the kernel
 * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set,
 * and NET_IP_ALIGN defined to 2.
 */
#define BPF_F_STRICT_ALIGNMENT	(1U << 0)

#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 */

/* flags for BPF_MAP_CREATE command */
#define BPF_F_NO_PREALLOC	(1U << 0)
/* Instead of having one common LRU list in the
 * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
 * which can scale and perform better.
 * Note, the LRU nodes (including free nodes) cannot be moved
 * across different LRU lists.
 */
#define BPF_F_NO_COMMON_LRU	(1U << 1)
/* Specify numa node during map creation */
#define BPF_F_NUMA_NODE		(1U << 2)

/* flags for BPF_PROG_QUERY */
#define BPF_F_QUERY_EFFECTIVE	(1U << 0)

#define BPF_OBJ_NAME_LEN 16U

/* Flags for accessing BPF object */
#define BPF_F_RDONLY		(1U << 3)
#define BPF_F_WRONLY		(1U << 4)

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;	/* BPF_MAP_CREATE related
					 * flags defined above.
					 */
		__u32	inner_map_fd;	/* fd pointing to the inner map */
		__u32	numa_node;	/* numa node (effective only if
					 * BPF_F_NUMA_NODE is set).
					 */
		char	map_name[BPF_OBJ_NAME_LEN];
	};

	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 */
		__u32		prog_flags;
		char		prog_name[BPF_OBJ_NAME_LEN];
		__u32		prog_ifindex;	/* ifindex of netdev to prep for */
	};

	struct { /* anonymous struct used by BPF_OBJ_* commands */
		__aligned_u64	pathname;
		__u32		bpf_fd;
		__u32		file_flags;
	};

	struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
		__u32		target_fd;	/* container object to attach to */
		__u32		attach_bpf_fd;	/* eBPF program to attach */
		__u32		attach_type;
		__u32		attach_flags;
	};

	struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
		__u32		prog_fd;
		__u32		retval;
		__u32		data_size_in;
		__u32		data_size_out;
		__aligned_u64	data_in;
		__aligned_u64	data_out;
		__u32		repeat;
		__u32		duration;
	} test;

	struct { /* anonymous struct used by BPF_*_GET_*_ID */
		union {
			__u32		start_id;
			__u32		prog_id;
			__u32		map_id;
		};
		__u32		next_id;
		__u32		open_flags;
	};

	struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
		__u32		bpf_fd;
		__u32		info_len;
		__aligned_u64	info;
	} info;

	struct { /* anonymous struct used by BPF_PROG_QUERY command */
		__u32		target_fd;	/* container object to query */
		__u32		attach_type;
		__u32		query_flags;
		__u32		attach_flags;
		__aligned_u64	prog_ids;
		__u32		prog_cnt;
	} query;
} __attribute__((aligned(8)));

/* BPF helper function descriptions:
 *
 * void *bpf_map_lookup_elem(&map, &key)
 *     Return: Map value or NULL
 *
 * int bpf_map_update_elem(&map, &key, &value, flags)
 *     Return: 0 on success or negative error
 *
 * int bpf_map_delete_elem(&map, &key)
 *     Return: 0 on success or negative error
 *
 * int bpf_probe_read(void *dst, int size, void *src)
 *     Return: 0 on success or negative error
 *
 * u64 bpf_ktime_get_ns(void)
 *     Return: current ktime
 *
 * int bpf_trace_printk(const char *fmt, int fmt_size, ...)
 *     Return: length of buffer written or negative error
 *
 * u32 bpf_prandom_u32(void)
 *     Return: random value
 *
 * u32 bpf_raw_smp_processor_id(void)
 *     Return: SMP processor ID
 *
 * int bpf_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 or negative error
 *
 * int bpf_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 or negative error
 *
 * int bpf_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 or negative error
 *
 * int 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: 32-bit index inside array that selects specific program to run
 *     Return: 0 on success or negative error
 *
 * int 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 or negative error
 *
 * u64 bpf_get_current_pid_tgid(void)
 *     Return: current->tgid << 32 | current->pid
 *
 * u64 bpf_get_current_uid_gid(void)
 *     Return: current_gid << 32 | current_uid
 *
 * int bpf_get_current_comm(char *buf, int size_of_buf)
 *     stores current->comm into buf
 *     Return: 0 on success or negative error
 *
 * u32 bpf_get_cgroup_classid(skb)
 *     retrieve a proc's classid
 *     @skb: pointer to skb
 *     Return: classid if != 0
 *
 * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
 *     Return: 0 on success or negative error
 *
 * int bpf_skb_vlan_pop(skb)
 *     Return: 0 on success or negative error
 *
 * int bpf_skb_get_tunnel_key(skb, key, size, flags)
 * int bpf_skb_set_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
 *     Return: 0 on success or negative error
 *
 * u64 bpf_perf_event_read(map, flags)
 *     read perf event counter value
 *     @map: pointer to perf_event_array map
 *     @flags: index of event in the map or bitmask flags
 *     Return: value of perf event counter read or error code
 *
 * int bpf_redirect(ifindex, flags)
 *     redirect to another netdev
 *     @ifindex: ifindex of the net device
 *     @flags:
 *	  cls_bpf:
 *          bit 0 - if set, redirect to ingress instead of egress
 *          other bits - reserved
 *	  xdp_bpf:
 *	    all bits - reserved
 *     Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error
 *	       xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error
 * int bpf_redirect_map(map, key, flags)
 *     redirect to endpoint in map
 *     @map: pointer to dev map
 *     @key: index in map to lookup
 *     @flags: --
 *     Return: XDP_REDIRECT on success or XDP_ABORT on error
 *
 * u32 bpf_get_route_realm(skb)
 *     retrieve a dst's tclassid
 *     @skb: pointer to skb
 *     Return: realm if != 0
 *
 * int bpf_perf_event_output(ctx, map, flags, data, size)
 *     output perf raw sample
 *     @ctx: struct pt_regs*
 *     @map: pointer to perf_event_array map
 *     @flags: index of event in the map or bitmask flags
 *     @data: data on stack to be output as raw data
 *     @size: size of data
 *     Return: 0 on success or negative error
 *
 * int 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
 *
 * s64 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 or negative error code
 *
 * int bpf_skb_get_tunnel_opt(skb, opt, size)
 *     retrieve tunnel options metadata
 *     @skb: pointer to skb
 *     @opt: pointer to raw tunnel option data
 *     @size: size of @opt
 *     Return: option size
 *
 * int bpf_skb_set_tunnel_opt(skb, opt, size)
 *     populate tunnel options metadata
 *     @skb: pointer to skb
 *     @opt: pointer to raw tunnel option data
 *     @size: size of @opt
 *     Return: 0 on success or negative error
 *
 * int bpf_skb_change_proto(skb, proto, flags)
 *     Change protocol of the skb. Currently supported is v4 -> v6,
 *     v6 -> v4 transitions. The helper will also resize the skb. eBPF
 *     program is expected to fill the new headers via skb_store_bytes
 *     and lX_csum_replace.
 *     @skb: pointer to skb
 *     @proto: new skb->protocol type
 *     @flags: reserved
 *     Return: 0 on success or negative error
 *
 * int bpf_skb_change_type(skb, type)
 *     Change packet type of skb.
 *     @skb: pointer to skb
 *     @type: new skb->pkt_type type
 *     Return: 0 on success or negative error
 *
 * int bpf_skb_under_cgroup(skb, map, index)
 *     Check cgroup2 membership of skb
 *     @skb: pointer to skb
 *     @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
 *     @index: index of the cgroup in the bpf_map
 *     Return:
 *       == 0 skb failed the cgroup2 descendant test
 *       == 1 skb succeeded the cgroup2 descendant test
 *        < 0 error
 *
 * u32 bpf_get_hash_recalc(skb)
 *     Retrieve and possibly recalculate skb->hash.
 *     @skb: pointer to skb
 *     Return: hash
 *
 * u64 bpf_get_current_task(void)
 *     Returns current task_struct
 *     Return: current
 *
 * int bpf_probe_write_user(void *dst, void *src, int len)
 *     safely attempt to write to a location
 *     @dst: destination address in userspace
 *     @src: source address on stack
 *     @len: number of bytes to copy
 *     Return: 0 on success or negative error
 *
 * int bpf_current_task_under_cgroup(map, index)
 *     Check cgroup2 membership of current task
 *     @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
 *     @index: index of the cgroup in the bpf_map
 *     Return:
 *       == 0 current failed the cgroup2 descendant test
 *       == 1 current succeeded the cgroup2 descendant test
 *        < 0 error
 *
 * int bpf_skb_change_tail(skb, len, flags)
 *     The helper will resize the skb to the given new size, to be used f.e.
 *     with control messages.
 *     @skb: pointer to skb
 *     @len: new skb length
 *     @flags: reserved
 *     Return: 0 on success or negative error
 *
 * int bpf_skb_pull_data(skb, len)
 *     The helper will pull in non-linear data in case the skb is non-linear
 *     and not all of len are part of the linear section. Only needed for
 *     read/write with direct packet access.
 *     @skb: pointer to skb
 *     @len: len to make read/writeable
 *     Return: 0 on success or negative error
 *
 * s64 bpf_csum_update(skb, csum)
 *     Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
 *     @skb: pointer to skb
 *     @csum: csum to add
 *     Return: csum on success or negative error
 *
 * void bpf_set_hash_invalid(skb)
 *     Invalidate current skb->hash.
 *     @skb: pointer to skb
 *
 * int bpf_get_numa_node_id()
 *     Return: Id of current NUMA node.
 *
 * int bpf_skb_change_head()
 *     Grows headroom of skb and adjusts MAC header offset accordingly.
 *     Will extends/reallocae as required automatically.
 *     May change skb data pointer and will thus invalidate any check
 *     performed for direct packet access.
 *     @skb: pointer to skb
 *     @len: length of header to be pushed in front
 *     @flags: Flags (unused for now)
 *     Return: 0 on success or negative error
 *
 * int bpf_xdp_adjust_head(xdp_md, delta)
 *     Adjust the xdp_md.data by delta
 *     @xdp_md: pointer to xdp_md
 *     @delta: An positive/negative integer to be added to xdp_md.data
 *     Return: 0 on success or negative on error
 *
 * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
 *     Copy a NUL terminated string from unsafe address. In case the string
 *     length is smaller than size, the target is not padded with further NUL
 *     bytes. In case the string length is larger than size, just count-1
 *     bytes are copied and the last byte is set to NUL.
 *     @dst: destination address
 *     @size: maximum number of bytes to copy, including the trailing NUL
 *     @unsafe_ptr: unsafe address
 *     Return:
 *       > 0 length of the string including the trailing NUL on success
 *       < 0 error
 *
 * u64 bpf_get_socket_cookie(skb)
 *     Get the cookie for the socket stored inside sk_buff.
 *     @skb: pointer to skb
 *     Return: 8 Bytes non-decreasing number on success or 0 if the socket
 *     field is missing inside sk_buff
 *
 * u32 bpf_get_socket_uid(skb)
 *     Get the owner uid of the socket stored inside sk_buff.
 *     @skb: pointer to skb
 *     Return: uid of the socket owner on success or overflowuid if failed.
 *
 * u32 bpf_set_hash(skb, hash)
 *     Set full skb->hash.
 *     @skb: pointer to skb
 *     @hash: hash to set
 *
 * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
 *     Calls setsockopt. Not all opts are available, only those with
 *     integer optvals plus TCP_CONGESTION.
 *     Supported levels: SOL_SOCKET and IPPROTO_TCP
 *     @bpf_socket: pointer to bpf_socket
 *     @level: SOL_SOCKET or IPPROTO_TCP
 *     @optname: option name
 *     @optval: pointer to option value
 *     @optlen: length of optval in bytes
 *     Return: 0 or negative error
 *
 * int bpf_getsockopt(bpf_socket, level, optname, optval, optlen)
 *     Calls getsockopt. Not all opts are available.
 *     Supported levels: IPPROTO_TCP
 *     @bpf_socket: pointer to bpf_socket
 *     @level: IPPROTO_TCP
 *     @optname: option name
 *     @optval: pointer to option value
 *     @optlen: length of optval in bytes
 *     Return: 0 or negative error
 *
 * int bpf_skb_adjust_room(skb, len_diff, mode, flags)
 *     Grow or shrink room in sk_buff.
 *     @skb: pointer to skb
 *     @len_diff: (signed) amount of room to grow/shrink
 *     @mode: operation mode (enum bpf_adj_room_mode)
 *     @flags: reserved for future use
 *     Return: 0 on success or negative error code
 *
 * int bpf_sk_redirect_map(map, key, flags)
 *     Redirect skb to a sock in map using key as a lookup key for the
 *     sock in map.
 *     @map: pointer to sockmap
 *     @key: key to lookup sock in map
 *     @flags: reserved for future use
 *     Return: SK_PASS
 *
 * int bpf_sock_map_update(skops, map, key, flags)
 *	@skops: pointer to bpf_sock_ops
 *	@map: pointer to sockmap to update
 *	@key: key to insert/update sock in map
 *	@flags: same flags as map update elem
 *
 * int bpf_xdp_adjust_meta(xdp_md, delta)
 *     Adjust the xdp_md.data_meta by delta
 *     @xdp_md: pointer to xdp_md
 *     @delta: An positive/negative integer to be added to xdp_md.data_meta
 *     Return: 0 on success or negative on error
 *
 * int bpf_perf_event_read_value(map, flags, buf, buf_size)
 *     read perf event counter value and perf event enabled/running time
 *     @map: pointer to perf_event_array map
 *     @flags: index of event in the map or bitmask flags
 *     @buf: buf to fill
 *     @buf_size: size of the buf
 *     Return: 0 on success or negative error code
 *
 * int bpf_perf_prog_read_value(ctx, buf, buf_size)
 *     read perf prog attached perf event counter and enabled/running time
 *     @ctx: pointer to ctx
 *     @buf: buf to fill
 *     @buf_size: size of the buf
 *     Return : 0 on success or negative error code
 */
#define __BPF_FUNC_MAPPER(FN)		\
	FN(unspec),			\
	FN(map_lookup_elem),		\
	FN(map_update_elem),		\
	FN(map_delete_elem),		\
	FN(probe_read),			\
	FN(ktime_get_ns),		\
	FN(trace_printk),		\
	FN(get_prandom_u32),		\
	FN(get_smp_processor_id),	\
	FN(skb_store_bytes),		\
	FN(l3_csum_replace),		\
	FN(l4_csum_replace),		\
	FN(tail_call),			\
	FN(clone_redirect),		\
	FN(get_current_pid_tgid),	\
	FN(get_current_uid_gid),	\
	FN(get_current_comm),		\
	FN(get_cgroup_classid),		\
	FN(skb_vlan_push),		\
	FN(skb_vlan_pop),		\
	FN(skb_get_tunnel_key),		\
	FN(skb_set_tunnel_key),		\
	FN(perf_event_read),		\
	FN(redirect),			\
	FN(get_route_realm),		\
	FN(perf_event_output),		\
	FN(skb_load_bytes),		\
	FN(get_stackid),		\
	FN(csum_diff),			\
	FN(skb_get_tunnel_opt),		\
	FN(skb_set_tunnel_opt),		\
	FN(skb_change_proto),		\
	FN(skb_change_type),		\
	FN(skb_under_cgroup),		\
	FN(get_hash_recalc),		\
	FN(get_current_task),		\
	FN(probe_write_user),		\
	FN(current_task_under_cgroup),	\
	FN(skb_change_tail),		\
	FN(skb_pull_data),		\
	FN(csum_update),		\
	FN(set_hash_invalid),		\
	FN(get_numa_node_id),		\
	FN(skb_change_head),		\
	FN(xdp_adjust_head),		\
	FN(probe_read_str),		\
	FN(get_socket_cookie),		\
	FN(get_socket_uid),		\
	FN(set_hash),			\
	FN(setsockopt),			\
	FN(skb_adjust_room),		\
	FN(redirect_map),		\
	FN(sk_redirect_map),		\
	FN(sock_map_update),		\
	FN(xdp_adjust_meta),		\
	FN(perf_event_read_value),	\
	FN(perf_prog_read_value),	\
	FN(getsockopt),

/* integer value in 'imm' field of BPF_CALL instruction selects which helper
 * function eBPF program intends to call
 */
#define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
enum bpf_func_id {
	__BPF_FUNC_MAPPER(__BPF_ENUM_FN)
	__BPF_FUNC_MAX_ID,
};
#undef __BPF_ENUM_FN

/* 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)
#define BPF_F_MARK_ENFORCE		(1ULL << 6)

/* 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)

/* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and
 * BPF_FUNC_perf_event_read_value flags.
 */
#define BPF_F_INDEX_MASK		0xffffffffULL
#define BPF_F_CURRENT_CPU		BPF_F_INDEX_MASK
/* BPF_FUNC_perf_event_output for sk_buff input context. */
#define BPF_F_CTXLEN_MASK		(0xfffffULL << 32)

/* Mode for BPF_FUNC_skb_adjust_room helper. */
enum bpf_adj_room_mode {
	BPF_ADJ_ROOM_NET,
};

/* 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;
	__u32 data;
	__u32 data_end;
	__u32 napi_id;

	/* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */
	__u32 family;
	__u32 remote_ip4;	/* Stored in network byte order */
	__u32 local_ip4;	/* Stored in network byte order */
	__u32 remote_ip6[4];	/* Stored in network byte order */
	__u32 local_ip6[4];	/* Stored in network byte order */
	__u32 remote_port;	/* Stored in network byte order */
	__u32 local_port;	/* stored in host byte order */
	/* ... here. */

	__u32 data_meta;
};

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;
};

/* Generic BPF return codes which all BPF program types may support.
 * The values are binary compatible with their TC_ACT_* counter-part to
 * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
 * programs.
 *
 * XDP is handled seprately, see XDP_*.
 */
enum bpf_ret_code {
	BPF_OK = 0,
	/* 1 reserved */
	BPF_DROP = 2,
	/* 3-6 reserved */
	BPF_REDIRECT = 7,
	/* >127 are reserved for prog type specific return codes */
};

struct bpf_sock {
	__u32 bound_dev_if;
	__u32 family;
	__u32 type;
	__u32 protocol;
	__u32 mark;
	__u32 priority;
};

#define XDP_PACKET_HEADROOM 256

/* User return codes for XDP prog type.
 * A valid XDP program must return one of these defined values. All other
 * return codes are reserved for future use. Unknown return codes will
 * result in packet drops and a warning via bpf_warn_invalid_xdp_action().
 */
enum xdp_action {
	XDP_ABORTED = 0,
	XDP_DROP,
	XDP_PASS,
	XDP_TX,
	XDP_REDIRECT,
};

/* user accessible metadata for XDP packet hook
 * new fields must be added to the end of this structure
 */
struct xdp_md {
	__u32 data;
	__u32 data_end;
	__u32 data_meta;
};

enum sk_action {
	SK_DROP = 0,
	SK_PASS,
};

#define BPF_TAG_SIZE	8

struct bpf_prog_info {
	__u32 type;
	__u32 id;
	__u8  tag[BPF_TAG_SIZE];
	__u32 jited_prog_len;
	__u32 xlated_prog_len;
	__aligned_u64 jited_prog_insns;
	__aligned_u64 xlated_prog_insns;
	__u64 load_time;	/* ns since boottime */
	__u32 created_by_uid;
	__u32 nr_map_ids;
	__aligned_u64 map_ids;
	char name[BPF_OBJ_NAME_LEN];
} __attribute__((aligned(8)));

struct bpf_map_info {
	__u32 type;
	__u32 id;
	__u32 key_size;
	__u32 value_size;
	__u32 max_entries;
	__u32 map_flags;
	char  name[BPF_OBJ_NAME_LEN];
} __attribute__((aligned(8)));

/* User bpf_sock_ops struct to access socket values and specify request ops
 * and their replies.
 * Some of this fields are in network (bigendian) byte order and may need
 * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
 * New fields can only be added at the end of this structure
 */
struct bpf_sock_ops {
	__u32 op;
	union {
		__u32 reply;
		__u32 replylong[4];
	};
	__u32 family;
	__u32 remote_ip4;	/* Stored in network byte order */
	__u32 local_ip4;	/* Stored in network byte order */
	__u32 remote_ip6[4];	/* Stored in network byte order */
	__u32 local_ip6[4];	/* Stored in network byte order */
	__u32 remote_port;	/* Stored in network byte order */
	__u32 local_port;	/* stored in host byte order */
};

/* List of known BPF sock_ops operators.
 * New entries can only be added at the end
 */
enum {
	BPF_SOCK_OPS_VOID,
	BPF_SOCK_OPS_TIMEOUT_INIT,	/* Should return SYN-RTO value to use or
					 * -1 if default value should be used
					 */
	BPF_SOCK_OPS_RWND_INIT,		/* Should return initial advertized
					 * window (in packets) or -1 if default
					 * value should be used
					 */
	BPF_SOCK_OPS_TCP_CONNECT_CB,	/* Calls BPF program right before an
					 * active connection is initialized
					 */
	BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB,	/* Calls BPF program when an
						 * active connection is
						 * established
						 */
	BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB,	/* Calls BPF program when a
						 * passive connection is
						 * established
						 */
	BPF_SOCK_OPS_NEEDS_ECN,		/* If connection's congestion control
					 * needs ECN
					 */
	BPF_SOCK_OPS_BASE_RTT,		/* Get base RTT. The correct value is
					 * based on the path and may be
					 * dependent on the congestion control
					 * algorithm. In general it indicates
					 * a congestion threshold. RTTs above
					 * this indicate congestion
					 */
};

#define TCP_BPF_IW		1001	/* Set TCP initial congestion window */
#define TCP_BPF_SNDCWND_CLAMP	1002	/* Set sndcwnd_clamp */

struct bpf_perf_event_value {
	__u64 counter;
	__u64 enabled;
	__u64 running;
};

#define BPF_DEVCG_ACC_MKNOD	(1ULL << 0)
#define BPF_DEVCG_ACC_READ	(1ULL << 1)
#define BPF_DEVCG_ACC_WRITE	(1ULL << 2)

#define BPF_DEVCG_DEV_BLOCK	(1ULL << 0)
#define BPF_DEVCG_DEV_CHAR	(1ULL << 1)

struct bpf_cgroup_dev_ctx {
	/* access_type encoded as (BPF_DEVCG_ACC_* << 16) | BPF_DEVCG_DEV_* */
	__u32 access_type;
	__u32 major;
	__u32 minor;
};

#endif /* _UAPI__LINUX_BPF_H__ */

Filemanager

Name Type Size Permission Actions
android Folder 0755
byteorder Folder 0755
caif Folder 0755
can Folder 0755
cifs Folder 0755
dvb Folder 0755
genwqe Folder 0755
hdlc Folder 0755
hsi Folder 0755
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isdn Folder 0755
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sunrpc Folder 0755
tc_act Folder 0755
tc_ematch Folder 0755
usb Folder 0755
wimax Folder 0755
Kbuild File 352 B 0644
a.out.h File 6.8 KB 0644
acct.h File 3.82 KB 0644
adb.h File 1.13 KB 0644
adfs_fs.h File 951 B 0644
affs_hardblocks.h File 1.51 KB 0644
agpgart.h File 3.91 KB 0644
aio_abi.h File 3.2 KB 0644
am437x-vpfe.h File 3.59 KB 0644
apm_bios.h File 3.61 KB 0644
arcfb.h File 213 B 0644
arm_sdei.h File 2.7 KB 0644
aspeed-lpc-ctrl.h File 1.75 KB 0644
atalk.h File 1.01 KB 0644
atm.h File 7.75 KB 0644
atm_eni.h File 648 B 0644
atm_he.h File 406 B 0644
atm_idt77105.h File 955 B 0644
atm_nicstar.h File 1.25 KB 0644
atm_tcp.h File 1.6 KB 0644
atm_zatm.h File 1.5 KB 0644
atmapi.h File 952 B 0644
atmarp.h File 1.27 KB 0644
atmbr2684.h File 3.19 KB 0644
atmclip.h File 576 B 0644
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atmmpc.h File 4.13 KB 0644
atmppp.h File 639 B 0644
atmsap.h File 4.85 KB 0644
atmsvc.h File 1.81 KB 0644
audit.h File 19.11 KB 0644
aufs_type.h File 12.18 KB 0644
auto_dev-ioctl.h File 4.88 KB 0644
auto_fs.h File 2.65 KB 0644
auto_fs4.h File 4.14 KB 0644
auxvec.h File 1.48 KB 0644
ax25.h File 2.76 KB 0644
b1lli.h File 1.68 KB 0644
batman_adv.h File 9.24 KB 0644
baycom.h File 883 B 0644
bcache.h File 8.11 KB 0644
bcm933xx_hcs.h File 419 B 0644
bfs_fs.h File 1.85 KB 0644
binfmts.h File 643 B 0644
blkpg.h File 1.64 KB 0644
blktrace_api.h File 4.61 KB 0644
blkzoned.h File 5.05 KB 0644
bpf.h File 30.34 KB 0644
bpf_common.h File 1.28 KB 0644
bpf_perf_event.h File 531 B 0644
bpqether.h File 981 B 0644
bsg.h File 2.45 KB 0644
bt-bmc.h File 587 B 0644
btrfs.h File 25.78 KB 0644
btrfs_tree.h File 24.62 KB 0644
can.h File 7.71 KB 0644
capability.h File 11.56 KB 0644
capi.h File 3.08 KB 0644
cciss_defs.h File 3.2 KB 0644
cciss_ioctl.h File 2.72 KB 0644
cdrom.h File 28.22 KB 0644
cec-funcs.h File 53.23 KB 0644
cec.h File 36.69 KB 0644
cgroupstats.h File 2.17 KB 0644
chio.h File 5.23 KB 0644
cm4000_cs.h File 1.78 KB 0644
cn_proc.h File 3.27 KB 0644
coda.h File 17.27 KB 0644
coda_psdev.h File 375 B 0644
coff.h File 12.18 KB 0644
connector.h File 2.21 KB 0644
const.h File 935 B 0644
coresight-stm.h File 706 B 0644
cramfs_fs.h File 3.49 KB 0644
cryptouser.h File 3.31 KB 0644
cuda.h File 920 B 0644
cyclades.h File 16.72 KB 0644
cycx_cfm.h File 2.92 KB 0644
dcbnl.h File 24.37 KB 0644
dccp.h File 6.3 KB 0644
devlink.h File 7.17 KB 0644
dlm.h File 2.51 KB 0644
dlm_device.h File 2.54 KB 0644
dlm_netlink.h File 1.13 KB 0644
dlm_plock.h File 909 B 0644
dlmconstants.h File 4.96 KB 0644
dm-ioctl.h File 10.62 KB 0644
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dma-buf.h File 1.33 KB 0644
dn.h File 4.53 KB 0644
dqblk_xfs.h File 8.79 KB 0644
edd.h File 5.49 KB 0644
efs_fs_sb.h File 2.17 KB 0644
elf-em.h File 2.14 KB 0644
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elf.h File 13 KB 0644
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errno.h File 23 B 0644
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fd.h File 11.45 KB 0644
fdreg.h File 5.29 KB 0644
fib_rules.h File 1.79 KB 0644
fiemap.h File 2.71 KB 0644
filter.h File 2.21 KB 0644
firewire-cdev.h File 42.86 KB 0644
firewire-constants.h File 3.16 KB 0644
flat.h File 2.11 KB 0644
fou.h File 709 B 0644
fs.h File 14.52 KB 0644
fsl_hypervisor.h File 7.14 KB 0644
fsmap.h File 4.28 KB 0644
fuse.h File 17.11 KB 0644
futex.h File 4.93 KB 0644
gameport.h File 912 B 0644
gen_stats.h File 1.54 KB 0644
genetlink.h File 1.89 KB 0644
gfs2_ondisk.h File 12.06 KB 0644
gigaset_dev.h File 1.41 KB 0644
gpio.h File 5.63 KB 0644
gsmmux.h File 1.02 KB 0644
gtp.h File 696 B 0644
hash_info.h File 936 B 0644
hdlc.h File 652 B 0644
hdlcdrv.h File 2.85 KB 0644
hdreg.h File 22.41 KB 0644
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hiddev.h File 6.21 KB 0644
hidraw.h File 1.49 KB 0644
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hsr_netlink.h File 1.06 KB 0644
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if_link.h File 21.48 KB 0644
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if_pppox.h File 4.69 KB 0644
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if_tun.h File 3.89 KB 0644
if_tunnel.h File 3.93 KB 0644
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ife.h File 351 B 0644
igmp.h File 2.96 KB 0644
ila.h File 1.22 KB 0644
in.h File 9.62 KB 0644
in6.h File 7.28 KB 0644
in_route.h File 936 B 0644
inet_diag.h File 4.24 KB 0644
inotify.h File 2.92 KB 0644
input-event-codes.h File 24.12 KB 0644
input.h File 15.14 KB 0644
ioctl.h File 163 B 0644
ip.h File 4.6 KB 0644
ip6_tunnel.h File 1.91 KB 0644
ip_vs.h File 13.31 KB 0644
ipc.h File 2.07 KB 0644
ipmi.h File 15.92 KB 0644
ipmi_msgdefs.h File 4.43 KB 0644
ipsec.h File 947 B 0644
ipv6.h File 3.89 KB 0644
ipv6_route.h File 1.88 KB 0644
ipx.h File 2.29 KB 0644
irda.h File 7.38 KB 0644
irqnr.h File 104 B 0644
isdn.h File 5.65 KB 0644
isdn_divertif.h File 1.19 KB 0644
isdn_ppp.h File 1.89 KB 0644
isdnif.h File 2.33 KB 0644
iso_fs.h File 6.33 KB 0644
ivtv.h File 2.99 KB 0644
ivtvfb.h File 1.21 KB 0644
ixjuser.h File 24.6 KB 0644
jffs2.h File 6.85 KB 0644
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kcmp.h File 537 B 0644
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kd.h File 6.2 KB 0644
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kernel-page-flags.h File 892 B 0644
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kernelcapi.h File 1.01 KB 0644
kexec.h File 1.85 KB 0644
keyboard.h File 12.5 KB 0644
keyctl.h File 3.49 KB 0644
kfd_ioctl.h File 9.37 KB 0644
kvm.h File 40.22 KB 0644
kvm_para.h File 897 B 0644
l2tp.h File 5.52 KB 0644
libc-compat.h File 8.11 KB 0644
lightnvm.h File 4.88 KB 0644
limits.h File 937 B 0644
lirc.h File 4.94 KB 0644
llc.h File 3.1 KB 0644
loop.h File 2.48 KB 0644
lp.h File 3.8 KB 0644
lwtunnel.h File 1.26 KB 0644
magic.h File 3.32 KB 0644
major.h File 4.6 KB 0644
map_to_7segment.h File 7.08 KB 0644
matroxfb.h File 1.43 KB 0644
max2175.h File 1.01 KB 0644
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media-bus-format.h File 6.26 KB 0644
media.h File 12.64 KB 0644
mei.h File 4.7 KB 0644
membarrier.h File 4.14 KB 0644
memfd.h File 1.21 KB 0644
mempolicy.h File 2.12 KB 0644
meye.h File 2.47 KB 0644
mic_common.h File 6.35 KB 0644
mic_ioctl.h File 2.26 KB 0644
mii.h File 7.9 KB 0644
minix_fs.h File 2.07 KB 0644
mman.h File 1.23 KB 0644
mmtimer.h File 2.07 KB 0644
module.h File 270 B 0644
mpls.h File 2.26 KB 0644
mpls_iptunnel.h File 776 B 0644
mqueue.h File 2.15 KB 0644
mroute.h File 5.31 KB 0644
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