xref: /aosp_15_r20/external/iproute2/include/uapi/linux/bpf.h (revision de1e4e894b0c224df933550f0afdecc354b238c4)
1*de1e4e89SAndroid Build Coastguard Worker /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2*de1e4e89SAndroid Build Coastguard Worker /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
3*de1e4e89SAndroid Build Coastguard Worker  *
4*de1e4e89SAndroid Build Coastguard Worker  * This program is free software; you can redistribute it and/or
5*de1e4e89SAndroid Build Coastguard Worker  * modify it under the terms of version 2 of the GNU General Public
6*de1e4e89SAndroid Build Coastguard Worker  * License as published by the Free Software Foundation.
7*de1e4e89SAndroid Build Coastguard Worker  */
8*de1e4e89SAndroid Build Coastguard Worker #ifndef __LINUX_BPF_H__
9*de1e4e89SAndroid Build Coastguard Worker #define __LINUX_BPF_H__
10*de1e4e89SAndroid Build Coastguard Worker 
11*de1e4e89SAndroid Build Coastguard Worker #include <linux/types.h>
12*de1e4e89SAndroid Build Coastguard Worker #include <linux/bpf_common.h>
13*de1e4e89SAndroid Build Coastguard Worker 
14*de1e4e89SAndroid Build Coastguard Worker /* Extended instruction set based on top of classic BPF */
15*de1e4e89SAndroid Build Coastguard Worker 
16*de1e4e89SAndroid Build Coastguard Worker /* instruction classes */
17*de1e4e89SAndroid Build Coastguard Worker #define BPF_ALU64	0x07	/* alu mode in double word width */
18*de1e4e89SAndroid Build Coastguard Worker 
19*de1e4e89SAndroid Build Coastguard Worker /* ld/ldx fields */
20*de1e4e89SAndroid Build Coastguard Worker #define BPF_DW		0x18	/* double word */
21*de1e4e89SAndroid Build Coastguard Worker #define BPF_XADD	0xc0	/* exclusive add */
22*de1e4e89SAndroid Build Coastguard Worker 
23*de1e4e89SAndroid Build Coastguard Worker /* alu/jmp fields */
24*de1e4e89SAndroid Build Coastguard Worker #define BPF_MOV		0xb0	/* mov reg to reg */
25*de1e4e89SAndroid Build Coastguard Worker #define BPF_ARSH	0xc0	/* sign extending arithmetic shift right */
26*de1e4e89SAndroid Build Coastguard Worker 
27*de1e4e89SAndroid Build Coastguard Worker /* change endianness of a register */
28*de1e4e89SAndroid Build Coastguard Worker #define BPF_END		0xd0	/* flags for endianness conversion: */
29*de1e4e89SAndroid Build Coastguard Worker #define BPF_TO_LE	0x00	/* convert to little-endian */
30*de1e4e89SAndroid Build Coastguard Worker #define BPF_TO_BE	0x08	/* convert to big-endian */
31*de1e4e89SAndroid Build Coastguard Worker #define BPF_FROM_LE	BPF_TO_LE
32*de1e4e89SAndroid Build Coastguard Worker #define BPF_FROM_BE	BPF_TO_BE
33*de1e4e89SAndroid Build Coastguard Worker 
34*de1e4e89SAndroid Build Coastguard Worker /* jmp encodings */
35*de1e4e89SAndroid Build Coastguard Worker #define BPF_JNE		0x50	/* jump != */
36*de1e4e89SAndroid Build Coastguard Worker #define BPF_JLT		0xa0	/* LT is unsigned, '<' */
37*de1e4e89SAndroid Build Coastguard Worker #define BPF_JLE		0xb0	/* LE is unsigned, '<=' */
38*de1e4e89SAndroid Build Coastguard Worker #define BPF_JSGT	0x60	/* SGT is signed '>', GT in x86 */
39*de1e4e89SAndroid Build Coastguard Worker #define BPF_JSGE	0x70	/* SGE is signed '>=', GE in x86 */
40*de1e4e89SAndroid Build Coastguard Worker #define BPF_JSLT	0xc0	/* SLT is signed, '<' */
41*de1e4e89SAndroid Build Coastguard Worker #define BPF_JSLE	0xd0	/* SLE is signed, '<=' */
42*de1e4e89SAndroid Build Coastguard Worker #define BPF_CALL	0x80	/* function call */
43*de1e4e89SAndroid Build Coastguard Worker #define BPF_EXIT	0x90	/* function return */
44*de1e4e89SAndroid Build Coastguard Worker 
45*de1e4e89SAndroid Build Coastguard Worker /* Register numbers */
46*de1e4e89SAndroid Build Coastguard Worker enum {
47*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_0 = 0,
48*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_1,
49*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_2,
50*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_3,
51*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_4,
52*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_5,
53*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_6,
54*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_7,
55*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_8,
56*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_9,
57*de1e4e89SAndroid Build Coastguard Worker 	BPF_REG_10,
58*de1e4e89SAndroid Build Coastguard Worker 	__MAX_BPF_REG,
59*de1e4e89SAndroid Build Coastguard Worker };
60*de1e4e89SAndroid Build Coastguard Worker 
61*de1e4e89SAndroid Build Coastguard Worker /* BPF has 10 general purpose 64-bit registers and stack frame. */
62*de1e4e89SAndroid Build Coastguard Worker #define MAX_BPF_REG	__MAX_BPF_REG
63*de1e4e89SAndroid Build Coastguard Worker 
64*de1e4e89SAndroid Build Coastguard Worker struct bpf_insn {
65*de1e4e89SAndroid Build Coastguard Worker 	__u8	code;		/* opcode */
66*de1e4e89SAndroid Build Coastguard Worker 	__u8	dst_reg:4;	/* dest register */
67*de1e4e89SAndroid Build Coastguard Worker 	__u8	src_reg:4;	/* source register */
68*de1e4e89SAndroid Build Coastguard Worker 	__s16	off;		/* signed offset */
69*de1e4e89SAndroid Build Coastguard Worker 	__s32	imm;		/* signed immediate constant */
70*de1e4e89SAndroid Build Coastguard Worker };
71*de1e4e89SAndroid Build Coastguard Worker 
72*de1e4e89SAndroid Build Coastguard Worker /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
73*de1e4e89SAndroid Build Coastguard Worker struct bpf_lpm_trie_key {
74*de1e4e89SAndroid Build Coastguard Worker 	__u32	prefixlen;	/* up to 32 for AF_INET, 128 for AF_INET6 */
75*de1e4e89SAndroid Build Coastguard Worker 	__u8	data[0];	/* Arbitrary size */
76*de1e4e89SAndroid Build Coastguard Worker };
77*de1e4e89SAndroid Build Coastguard Worker 
78*de1e4e89SAndroid Build Coastguard Worker /* BPF syscall commands, see bpf(2) man-page for details. */
79*de1e4e89SAndroid Build Coastguard Worker enum bpf_cmd {
80*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_CREATE,
81*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_LOOKUP_ELEM,
82*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_UPDATE_ELEM,
83*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_DELETE_ELEM,
84*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_GET_NEXT_KEY,
85*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_LOAD,
86*de1e4e89SAndroid Build Coastguard Worker 	BPF_OBJ_PIN,
87*de1e4e89SAndroid Build Coastguard Worker 	BPF_OBJ_GET,
88*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_ATTACH,
89*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_DETACH,
90*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TEST_RUN,
91*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_GET_NEXT_ID,
92*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_GET_NEXT_ID,
93*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_GET_FD_BY_ID,
94*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_GET_FD_BY_ID,
95*de1e4e89SAndroid Build Coastguard Worker 	BPF_OBJ_GET_INFO_BY_FD,
96*de1e4e89SAndroid Build Coastguard Worker };
97*de1e4e89SAndroid Build Coastguard Worker 
98*de1e4e89SAndroid Build Coastguard Worker enum bpf_map_type {
99*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_UNSPEC,
100*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_HASH,
101*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_ARRAY,
102*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_PROG_ARRAY,
103*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_PERF_EVENT_ARRAY,
104*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_PERCPU_HASH,
105*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_PERCPU_ARRAY,
106*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_STACK_TRACE,
107*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_CGROUP_ARRAY,
108*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_LRU_HASH,
109*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_LRU_PERCPU_HASH,
110*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_LPM_TRIE,
111*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_ARRAY_OF_MAPS,
112*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_HASH_OF_MAPS,
113*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_DEVMAP,
114*de1e4e89SAndroid Build Coastguard Worker 	BPF_MAP_TYPE_SOCKMAP,
115*de1e4e89SAndroid Build Coastguard Worker };
116*de1e4e89SAndroid Build Coastguard Worker 
117*de1e4e89SAndroid Build Coastguard Worker enum bpf_prog_type {
118*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_UNSPEC,
119*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_SOCKET_FILTER,
120*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_KPROBE,
121*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_SCHED_CLS,
122*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_SCHED_ACT,
123*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_TRACEPOINT,
124*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_XDP,
125*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_PERF_EVENT,
126*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_CGROUP_SKB,
127*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_CGROUP_SOCK,
128*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_LWT_IN,
129*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_LWT_OUT,
130*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_LWT_XMIT,
131*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_SOCK_OPS,
132*de1e4e89SAndroid Build Coastguard Worker 	BPF_PROG_TYPE_SK_SKB,
133*de1e4e89SAndroid Build Coastguard Worker };
134*de1e4e89SAndroid Build Coastguard Worker 
135*de1e4e89SAndroid Build Coastguard Worker enum bpf_attach_type {
136*de1e4e89SAndroid Build Coastguard Worker 	BPF_CGROUP_INET_INGRESS,
137*de1e4e89SAndroid Build Coastguard Worker 	BPF_CGROUP_INET_EGRESS,
138*de1e4e89SAndroid Build Coastguard Worker 	BPF_CGROUP_INET_SOCK_CREATE,
139*de1e4e89SAndroid Build Coastguard Worker 	BPF_CGROUP_SOCK_OPS,
140*de1e4e89SAndroid Build Coastguard Worker 	BPF_SK_SKB_STREAM_PARSER,
141*de1e4e89SAndroid Build Coastguard Worker 	BPF_SK_SKB_STREAM_VERDICT,
142*de1e4e89SAndroid Build Coastguard Worker 	__MAX_BPF_ATTACH_TYPE
143*de1e4e89SAndroid Build Coastguard Worker };
144*de1e4e89SAndroid Build Coastguard Worker 
145*de1e4e89SAndroid Build Coastguard Worker #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE
146*de1e4e89SAndroid Build Coastguard Worker 
147*de1e4e89SAndroid Build Coastguard Worker /* If BPF_F_ALLOW_OVERRIDE flag is used in BPF_PROG_ATTACH command
148*de1e4e89SAndroid Build Coastguard Worker  * to the given target_fd cgroup the descendent cgroup will be able to
149*de1e4e89SAndroid Build Coastguard Worker  * override effective bpf program that was inherited from this cgroup
150*de1e4e89SAndroid Build Coastguard Worker  */
151*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_ALLOW_OVERRIDE	(1U << 0)
152*de1e4e89SAndroid Build Coastguard Worker 
153*de1e4e89SAndroid Build Coastguard Worker /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the
154*de1e4e89SAndroid Build Coastguard Worker  * verifier will perform strict alignment checking as if the kernel
155*de1e4e89SAndroid Build Coastguard Worker  * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set,
156*de1e4e89SAndroid Build Coastguard Worker  * and NET_IP_ALIGN defined to 2.
157*de1e4e89SAndroid Build Coastguard Worker  */
158*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_STRICT_ALIGNMENT	(1U << 0)
159*de1e4e89SAndroid Build Coastguard Worker 
160*de1e4e89SAndroid Build Coastguard Worker #define BPF_PSEUDO_MAP_FD	1
161*de1e4e89SAndroid Build Coastguard Worker 
162*de1e4e89SAndroid Build Coastguard Worker /* flags for BPF_MAP_UPDATE_ELEM command */
163*de1e4e89SAndroid Build Coastguard Worker #define BPF_ANY		0 /* create new element or update existing */
164*de1e4e89SAndroid Build Coastguard Worker #define BPF_NOEXIST	1 /* create new element if it didn't exist */
165*de1e4e89SAndroid Build Coastguard Worker #define BPF_EXIST	2 /* update existing element */
166*de1e4e89SAndroid Build Coastguard Worker 
167*de1e4e89SAndroid Build Coastguard Worker /* flags for BPF_MAP_CREATE command */
168*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_NO_PREALLOC	(1U << 0)
169*de1e4e89SAndroid Build Coastguard Worker /* Instead of having one common LRU list in the
170*de1e4e89SAndroid Build Coastguard Worker  * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
171*de1e4e89SAndroid Build Coastguard Worker  * which can scale and perform better.
172*de1e4e89SAndroid Build Coastguard Worker  * Note, the LRU nodes (including free nodes) cannot be moved
173*de1e4e89SAndroid Build Coastguard Worker  * across different LRU lists.
174*de1e4e89SAndroid Build Coastguard Worker  */
175*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_NO_COMMON_LRU	(1U << 1)
176*de1e4e89SAndroid Build Coastguard Worker /* Specify numa node during map creation */
177*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_NUMA_NODE		(1U << 2)
178*de1e4e89SAndroid Build Coastguard Worker 
179*de1e4e89SAndroid Build Coastguard Worker union bpf_attr {
180*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_MAP_CREATE command */
181*de1e4e89SAndroid Build Coastguard Worker 		__u32	map_type;	/* one of enum bpf_map_type */
182*de1e4e89SAndroid Build Coastguard Worker 		__u32	key_size;	/* size of key in bytes */
183*de1e4e89SAndroid Build Coastguard Worker 		__u32	value_size;	/* size of value in bytes */
184*de1e4e89SAndroid Build Coastguard Worker 		__u32	max_entries;	/* max number of entries in a map */
185*de1e4e89SAndroid Build Coastguard Worker 		__u32	map_flags;	/* BPF_MAP_CREATE related
186*de1e4e89SAndroid Build Coastguard Worker 					 * flags defined above.
187*de1e4e89SAndroid Build Coastguard Worker 					 */
188*de1e4e89SAndroid Build Coastguard Worker 		__u32	inner_map_fd;	/* fd pointing to the inner map */
189*de1e4e89SAndroid Build Coastguard Worker 		__u32	numa_node;	/* numa node (effective only if
190*de1e4e89SAndroid Build Coastguard Worker 					 * BPF_F_NUMA_NODE is set).
191*de1e4e89SAndroid Build Coastguard Worker 					 */
192*de1e4e89SAndroid Build Coastguard Worker 	};
193*de1e4e89SAndroid Build Coastguard Worker 
194*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
195*de1e4e89SAndroid Build Coastguard Worker 		__u32		map_fd;
196*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	key;
197*de1e4e89SAndroid Build Coastguard Worker 		union {
198*de1e4e89SAndroid Build Coastguard Worker 			__aligned_u64 value;
199*de1e4e89SAndroid Build Coastguard Worker 			__aligned_u64 next_key;
200*de1e4e89SAndroid Build Coastguard Worker 		};
201*de1e4e89SAndroid Build Coastguard Worker 		__u64		flags;
202*de1e4e89SAndroid Build Coastguard Worker 	};
203*de1e4e89SAndroid Build Coastguard Worker 
204*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_PROG_LOAD command */
205*de1e4e89SAndroid Build Coastguard Worker 		__u32		prog_type;	/* one of enum bpf_prog_type */
206*de1e4e89SAndroid Build Coastguard Worker 		__u32		insn_cnt;
207*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	insns;
208*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	license;
209*de1e4e89SAndroid Build Coastguard Worker 		__u32		log_level;	/* verbosity level of verifier */
210*de1e4e89SAndroid Build Coastguard Worker 		__u32		log_size;	/* size of user buffer */
211*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	log_buf;	/* user supplied buffer */
212*de1e4e89SAndroid Build Coastguard Worker 		__u32		kern_version;	/* checked when prog_type=kprobe */
213*de1e4e89SAndroid Build Coastguard Worker 		__u32		prog_flags;
214*de1e4e89SAndroid Build Coastguard Worker 	};
215*de1e4e89SAndroid Build Coastguard Worker 
216*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_OBJ_* commands */
217*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	pathname;
218*de1e4e89SAndroid Build Coastguard Worker 		__u32		bpf_fd;
219*de1e4e89SAndroid Build Coastguard Worker 	};
220*de1e4e89SAndroid Build Coastguard Worker 
221*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
222*de1e4e89SAndroid Build Coastguard Worker 		__u32		target_fd;	/* container object to attach to */
223*de1e4e89SAndroid Build Coastguard Worker 		__u32		attach_bpf_fd;	/* eBPF program to attach */
224*de1e4e89SAndroid Build Coastguard Worker 		__u32		attach_type;
225*de1e4e89SAndroid Build Coastguard Worker 		__u32		attach_flags;
226*de1e4e89SAndroid Build Coastguard Worker 	};
227*de1e4e89SAndroid Build Coastguard Worker 
228*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
229*de1e4e89SAndroid Build Coastguard Worker 		__u32		prog_fd;
230*de1e4e89SAndroid Build Coastguard Worker 		__u32		retval;
231*de1e4e89SAndroid Build Coastguard Worker 		__u32		data_size_in;
232*de1e4e89SAndroid Build Coastguard Worker 		__u32		data_size_out;
233*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	data_in;
234*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	data_out;
235*de1e4e89SAndroid Build Coastguard Worker 		__u32		repeat;
236*de1e4e89SAndroid Build Coastguard Worker 		__u32		duration;
237*de1e4e89SAndroid Build Coastguard Worker 	} test;
238*de1e4e89SAndroid Build Coastguard Worker 
239*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_*_GET_*_ID */
240*de1e4e89SAndroid Build Coastguard Worker 		union {
241*de1e4e89SAndroid Build Coastguard Worker 			__u32		start_id;
242*de1e4e89SAndroid Build Coastguard Worker 			__u32		prog_id;
243*de1e4e89SAndroid Build Coastguard Worker 			__u32		map_id;
244*de1e4e89SAndroid Build Coastguard Worker 		};
245*de1e4e89SAndroid Build Coastguard Worker 		__u32		next_id;
246*de1e4e89SAndroid Build Coastguard Worker 	};
247*de1e4e89SAndroid Build Coastguard Worker 
248*de1e4e89SAndroid Build Coastguard Worker 	struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
249*de1e4e89SAndroid Build Coastguard Worker 		__u32		bpf_fd;
250*de1e4e89SAndroid Build Coastguard Worker 		__u32		info_len;
251*de1e4e89SAndroid Build Coastguard Worker 		__aligned_u64	info;
252*de1e4e89SAndroid Build Coastguard Worker 	} info;
253*de1e4e89SAndroid Build Coastguard Worker } __attribute__((aligned(8)));
254*de1e4e89SAndroid Build Coastguard Worker 
255*de1e4e89SAndroid Build Coastguard Worker /* BPF helper function descriptions:
256*de1e4e89SAndroid Build Coastguard Worker  *
257*de1e4e89SAndroid Build Coastguard Worker  * void *bpf_map_lookup_elem(&map, &key)
258*de1e4e89SAndroid Build Coastguard Worker  *     Return: Map value or NULL
259*de1e4e89SAndroid Build Coastguard Worker  *
260*de1e4e89SAndroid Build Coastguard Worker  * int bpf_map_update_elem(&map, &key, &value, flags)
261*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
262*de1e4e89SAndroid Build Coastguard Worker  *
263*de1e4e89SAndroid Build Coastguard Worker  * int bpf_map_delete_elem(&map, &key)
264*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
265*de1e4e89SAndroid Build Coastguard Worker  *
266*de1e4e89SAndroid Build Coastguard Worker  * int bpf_probe_read(void *dst, int size, void *src)
267*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
268*de1e4e89SAndroid Build Coastguard Worker  *
269*de1e4e89SAndroid Build Coastguard Worker  * u64 bpf_ktime_get_ns(void)
270*de1e4e89SAndroid Build Coastguard Worker  *     Return: current ktime
271*de1e4e89SAndroid Build Coastguard Worker  *
272*de1e4e89SAndroid Build Coastguard Worker  * int bpf_trace_printk(const char *fmt, int fmt_size, ...)
273*de1e4e89SAndroid Build Coastguard Worker  *     Return: length of buffer written or negative error
274*de1e4e89SAndroid Build Coastguard Worker  *
275*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_prandom_u32(void)
276*de1e4e89SAndroid Build Coastguard Worker  *     Return: random value
277*de1e4e89SAndroid Build Coastguard Worker  *
278*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_raw_smp_processor_id(void)
279*de1e4e89SAndroid Build Coastguard Worker  *     Return: SMP processor ID
280*de1e4e89SAndroid Build Coastguard Worker  *
281*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_store_bytes(skb, offset, from, len, flags)
282*de1e4e89SAndroid Build Coastguard Worker  *     store bytes into packet
283*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
284*de1e4e89SAndroid Build Coastguard Worker  *     @offset: offset within packet from skb->mac_header
285*de1e4e89SAndroid Build Coastguard Worker  *     @from: pointer where to copy bytes from
286*de1e4e89SAndroid Build Coastguard Worker  *     @len: number of bytes to store into packet
287*de1e4e89SAndroid Build Coastguard Worker  *     @flags: bit 0 - if true, recompute skb->csum
288*de1e4e89SAndroid Build Coastguard Worker  *             other bits - reserved
289*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
290*de1e4e89SAndroid Build Coastguard Worker  *
291*de1e4e89SAndroid Build Coastguard Worker  * int bpf_l3_csum_replace(skb, offset, from, to, flags)
292*de1e4e89SAndroid Build Coastguard Worker  *     recompute IP checksum
293*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
294*de1e4e89SAndroid Build Coastguard Worker  *     @offset: offset within packet where IP checksum is located
295*de1e4e89SAndroid Build Coastguard Worker  *     @from: old value of header field
296*de1e4e89SAndroid Build Coastguard Worker  *     @to: new value of header field
297*de1e4e89SAndroid Build Coastguard Worker  *     @flags: bits 0-3 - size of header field
298*de1e4e89SAndroid Build Coastguard Worker  *             other bits - reserved
299*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
300*de1e4e89SAndroid Build Coastguard Worker  *
301*de1e4e89SAndroid Build Coastguard Worker  * int bpf_l4_csum_replace(skb, offset, from, to, flags)
302*de1e4e89SAndroid Build Coastguard Worker  *     recompute TCP/UDP checksum
303*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
304*de1e4e89SAndroid Build Coastguard Worker  *     @offset: offset within packet where TCP/UDP checksum is located
305*de1e4e89SAndroid Build Coastguard Worker  *     @from: old value of header field
306*de1e4e89SAndroid Build Coastguard Worker  *     @to: new value of header field
307*de1e4e89SAndroid Build Coastguard Worker  *     @flags: bits 0-3 - size of header field
308*de1e4e89SAndroid Build Coastguard Worker  *             bit 4 - is pseudo header
309*de1e4e89SAndroid Build Coastguard Worker  *             other bits - reserved
310*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
311*de1e4e89SAndroid Build Coastguard Worker  *
312*de1e4e89SAndroid Build Coastguard Worker  * int bpf_tail_call(ctx, prog_array_map, index)
313*de1e4e89SAndroid Build Coastguard Worker  *     jump into another BPF program
314*de1e4e89SAndroid Build Coastguard Worker  *     @ctx: context pointer passed to next program
315*de1e4e89SAndroid Build Coastguard Worker  *     @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
316*de1e4e89SAndroid Build Coastguard Worker  *     @index: 32-bit index inside array that selects specific program to run
317*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
318*de1e4e89SAndroid Build Coastguard Worker  *
319*de1e4e89SAndroid Build Coastguard Worker  * int bpf_clone_redirect(skb, ifindex, flags)
320*de1e4e89SAndroid Build Coastguard Worker  *     redirect to another netdev
321*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
322*de1e4e89SAndroid Build Coastguard Worker  *     @ifindex: ifindex of the net device
323*de1e4e89SAndroid Build Coastguard Worker  *     @flags: bit 0 - if set, redirect to ingress instead of egress
324*de1e4e89SAndroid Build Coastguard Worker  *             other bits - reserved
325*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
326*de1e4e89SAndroid Build Coastguard Worker  *
327*de1e4e89SAndroid Build Coastguard Worker  * u64 bpf_get_current_pid_tgid(void)
328*de1e4e89SAndroid Build Coastguard Worker  *     Return: current->tgid << 32 | current->pid
329*de1e4e89SAndroid Build Coastguard Worker  *
330*de1e4e89SAndroid Build Coastguard Worker  * u64 bpf_get_current_uid_gid(void)
331*de1e4e89SAndroid Build Coastguard Worker  *     Return: current_gid << 32 | current_uid
332*de1e4e89SAndroid Build Coastguard Worker  *
333*de1e4e89SAndroid Build Coastguard Worker  * int bpf_get_current_comm(char *buf, int size_of_buf)
334*de1e4e89SAndroid Build Coastguard Worker  *     stores current->comm into buf
335*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
336*de1e4e89SAndroid Build Coastguard Worker  *
337*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_get_cgroup_classid(skb)
338*de1e4e89SAndroid Build Coastguard Worker  *     retrieve a proc's classid
339*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
340*de1e4e89SAndroid Build Coastguard Worker  *     Return: classid if != 0
341*de1e4e89SAndroid Build Coastguard Worker  *
342*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
343*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
344*de1e4e89SAndroid Build Coastguard Worker  *
345*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_vlan_pop(skb)
346*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
347*de1e4e89SAndroid Build Coastguard Worker  *
348*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_get_tunnel_key(skb, key, size, flags)
349*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_set_tunnel_key(skb, key, size, flags)
350*de1e4e89SAndroid Build Coastguard Worker  *     retrieve or populate tunnel metadata
351*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
352*de1e4e89SAndroid Build Coastguard Worker  *     @key: pointer to 'struct bpf_tunnel_key'
353*de1e4e89SAndroid Build Coastguard Worker  *     @size: size of 'struct bpf_tunnel_key'
354*de1e4e89SAndroid Build Coastguard Worker  *     @flags: room for future extensions
355*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
356*de1e4e89SAndroid Build Coastguard Worker  *
357*de1e4e89SAndroid Build Coastguard Worker  * u64 bpf_perf_event_read(map, flags)
358*de1e4e89SAndroid Build Coastguard Worker  *     read perf event counter value
359*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to perf_event_array map
360*de1e4e89SAndroid Build Coastguard Worker  *     @flags: index of event in the map or bitmask flags
361*de1e4e89SAndroid Build Coastguard Worker  *     Return: value of perf event counter read or error code
362*de1e4e89SAndroid Build Coastguard Worker  *
363*de1e4e89SAndroid Build Coastguard Worker  * int bpf_redirect(ifindex, flags)
364*de1e4e89SAndroid Build Coastguard Worker  *     redirect to another netdev
365*de1e4e89SAndroid Build Coastguard Worker  *     @ifindex: ifindex of the net device
366*de1e4e89SAndroid Build Coastguard Worker  *     @flags:
367*de1e4e89SAndroid Build Coastguard Worker  *	  cls_bpf:
368*de1e4e89SAndroid Build Coastguard Worker  *          bit 0 - if set, redirect to ingress instead of egress
369*de1e4e89SAndroid Build Coastguard Worker  *          other bits - reserved
370*de1e4e89SAndroid Build Coastguard Worker  *	  xdp_bpf:
371*de1e4e89SAndroid Build Coastguard Worker  *	    all bits - reserved
372*de1e4e89SAndroid Build Coastguard Worker  *     Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error
373*de1e4e89SAndroid Build Coastguard Worker  *	       xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error
374*de1e4e89SAndroid Build Coastguard Worker  * int bpf_redirect_map(map, key, flags)
375*de1e4e89SAndroid Build Coastguard Worker  *     redirect to endpoint in map
376*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to dev map
377*de1e4e89SAndroid Build Coastguard Worker  *     @key: index in map to lookup
378*de1e4e89SAndroid Build Coastguard Worker  *     @flags: --
379*de1e4e89SAndroid Build Coastguard Worker  *     Return: XDP_REDIRECT on success or XDP_ABORT on error
380*de1e4e89SAndroid Build Coastguard Worker  *
381*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_get_route_realm(skb)
382*de1e4e89SAndroid Build Coastguard Worker  *     retrieve a dst's tclassid
383*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
384*de1e4e89SAndroid Build Coastguard Worker  *     Return: realm if != 0
385*de1e4e89SAndroid Build Coastguard Worker  *
386*de1e4e89SAndroid Build Coastguard Worker  * int bpf_perf_event_output(ctx, map, flags, data, size)
387*de1e4e89SAndroid Build Coastguard Worker  *     output perf raw sample
388*de1e4e89SAndroid Build Coastguard Worker  *     @ctx: struct pt_regs*
389*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to perf_event_array map
390*de1e4e89SAndroid Build Coastguard Worker  *     @flags: index of event in the map or bitmask flags
391*de1e4e89SAndroid Build Coastguard Worker  *     @data: data on stack to be output as raw data
392*de1e4e89SAndroid Build Coastguard Worker  *     @size: size of data
393*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
394*de1e4e89SAndroid Build Coastguard Worker  *
395*de1e4e89SAndroid Build Coastguard Worker  * int bpf_get_stackid(ctx, map, flags)
396*de1e4e89SAndroid Build Coastguard Worker  *     walk user or kernel stack and return id
397*de1e4e89SAndroid Build Coastguard Worker  *     @ctx: struct pt_regs*
398*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to stack_trace map
399*de1e4e89SAndroid Build Coastguard Worker  *     @flags: bits 0-7 - numer of stack frames to skip
400*de1e4e89SAndroid Build Coastguard Worker  *             bit 8 - collect user stack instead of kernel
401*de1e4e89SAndroid Build Coastguard Worker  *             bit 9 - compare stacks by hash only
402*de1e4e89SAndroid Build Coastguard Worker  *             bit 10 - if two different stacks hash into the same stackid
403*de1e4e89SAndroid Build Coastguard Worker  *                      discard old
404*de1e4e89SAndroid Build Coastguard Worker  *             other bits - reserved
405*de1e4e89SAndroid Build Coastguard Worker  *     Return: >= 0 stackid on success or negative error
406*de1e4e89SAndroid Build Coastguard Worker  *
407*de1e4e89SAndroid Build Coastguard Worker  * s64 bpf_csum_diff(from, from_size, to, to_size, seed)
408*de1e4e89SAndroid Build Coastguard Worker  *     calculate csum diff
409*de1e4e89SAndroid Build Coastguard Worker  *     @from: raw from buffer
410*de1e4e89SAndroid Build Coastguard Worker  *     @from_size: length of from buffer
411*de1e4e89SAndroid Build Coastguard Worker  *     @to: raw to buffer
412*de1e4e89SAndroid Build Coastguard Worker  *     @to_size: length of to buffer
413*de1e4e89SAndroid Build Coastguard Worker  *     @seed: optional seed
414*de1e4e89SAndroid Build Coastguard Worker  *     Return: csum result or negative error code
415*de1e4e89SAndroid Build Coastguard Worker  *
416*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_get_tunnel_opt(skb, opt, size)
417*de1e4e89SAndroid Build Coastguard Worker  *     retrieve tunnel options metadata
418*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
419*de1e4e89SAndroid Build Coastguard Worker  *     @opt: pointer to raw tunnel option data
420*de1e4e89SAndroid Build Coastguard Worker  *     @size: size of @opt
421*de1e4e89SAndroid Build Coastguard Worker  *     Return: option size
422*de1e4e89SAndroid Build Coastguard Worker  *
423*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_set_tunnel_opt(skb, opt, size)
424*de1e4e89SAndroid Build Coastguard Worker  *     populate tunnel options metadata
425*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
426*de1e4e89SAndroid Build Coastguard Worker  *     @opt: pointer to raw tunnel option data
427*de1e4e89SAndroid Build Coastguard Worker  *     @size: size of @opt
428*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
429*de1e4e89SAndroid Build Coastguard Worker  *
430*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_change_proto(skb, proto, flags)
431*de1e4e89SAndroid Build Coastguard Worker  *     Change protocol of the skb. Currently supported is v4 -> v6,
432*de1e4e89SAndroid Build Coastguard Worker  *     v6 -> v4 transitions. The helper will also resize the skb. eBPF
433*de1e4e89SAndroid Build Coastguard Worker  *     program is expected to fill the new headers via skb_store_bytes
434*de1e4e89SAndroid Build Coastguard Worker  *     and lX_csum_replace.
435*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
436*de1e4e89SAndroid Build Coastguard Worker  *     @proto: new skb->protocol type
437*de1e4e89SAndroid Build Coastguard Worker  *     @flags: reserved
438*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
439*de1e4e89SAndroid Build Coastguard Worker  *
440*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_change_type(skb, type)
441*de1e4e89SAndroid Build Coastguard Worker  *     Change packet type of skb.
442*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
443*de1e4e89SAndroid Build Coastguard Worker  *     @type: new skb->pkt_type type
444*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
445*de1e4e89SAndroid Build Coastguard Worker  *
446*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_under_cgroup(skb, map, index)
447*de1e4e89SAndroid Build Coastguard Worker  *     Check cgroup2 membership of skb
448*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
449*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
450*de1e4e89SAndroid Build Coastguard Worker  *     @index: index of the cgroup in the bpf_map
451*de1e4e89SAndroid Build Coastguard Worker  *     Return:
452*de1e4e89SAndroid Build Coastguard Worker  *       == 0 skb failed the cgroup2 descendant test
453*de1e4e89SAndroid Build Coastguard Worker  *       == 1 skb succeeded the cgroup2 descendant test
454*de1e4e89SAndroid Build Coastguard Worker  *        < 0 error
455*de1e4e89SAndroid Build Coastguard Worker  *
456*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_get_hash_recalc(skb)
457*de1e4e89SAndroid Build Coastguard Worker  *     Retrieve and possibly recalculate skb->hash.
458*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
459*de1e4e89SAndroid Build Coastguard Worker  *     Return: hash
460*de1e4e89SAndroid Build Coastguard Worker  *
461*de1e4e89SAndroid Build Coastguard Worker  * u64 bpf_get_current_task(void)
462*de1e4e89SAndroid Build Coastguard Worker  *     Returns current task_struct
463*de1e4e89SAndroid Build Coastguard Worker  *     Return: current
464*de1e4e89SAndroid Build Coastguard Worker  *
465*de1e4e89SAndroid Build Coastguard Worker  * int bpf_probe_write_user(void *dst, void *src, int len)
466*de1e4e89SAndroid Build Coastguard Worker  *     safely attempt to write to a location
467*de1e4e89SAndroid Build Coastguard Worker  *     @dst: destination address in userspace
468*de1e4e89SAndroid Build Coastguard Worker  *     @src: source address on stack
469*de1e4e89SAndroid Build Coastguard Worker  *     @len: number of bytes to copy
470*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
471*de1e4e89SAndroid Build Coastguard Worker  *
472*de1e4e89SAndroid Build Coastguard Worker  * int bpf_current_task_under_cgroup(map, index)
473*de1e4e89SAndroid Build Coastguard Worker  *     Check cgroup2 membership of current task
474*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
475*de1e4e89SAndroid Build Coastguard Worker  *     @index: index of the cgroup in the bpf_map
476*de1e4e89SAndroid Build Coastguard Worker  *     Return:
477*de1e4e89SAndroid Build Coastguard Worker  *       == 0 current failed the cgroup2 descendant test
478*de1e4e89SAndroid Build Coastguard Worker  *       == 1 current succeeded the cgroup2 descendant test
479*de1e4e89SAndroid Build Coastguard Worker  *        < 0 error
480*de1e4e89SAndroid Build Coastguard Worker  *
481*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_change_tail(skb, len, flags)
482*de1e4e89SAndroid Build Coastguard Worker  *     The helper will resize the skb to the given new size, to be used f.e.
483*de1e4e89SAndroid Build Coastguard Worker  *     with control messages.
484*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
485*de1e4e89SAndroid Build Coastguard Worker  *     @len: new skb length
486*de1e4e89SAndroid Build Coastguard Worker  *     @flags: reserved
487*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
488*de1e4e89SAndroid Build Coastguard Worker  *
489*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_pull_data(skb, len)
490*de1e4e89SAndroid Build Coastguard Worker  *     The helper will pull in non-linear data in case the skb is non-linear
491*de1e4e89SAndroid Build Coastguard Worker  *     and not all of len are part of the linear section. Only needed for
492*de1e4e89SAndroid Build Coastguard Worker  *     read/write with direct packet access.
493*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
494*de1e4e89SAndroid Build Coastguard Worker  *     @len: len to make read/writeable
495*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
496*de1e4e89SAndroid Build Coastguard Worker  *
497*de1e4e89SAndroid Build Coastguard Worker  * s64 bpf_csum_update(skb, csum)
498*de1e4e89SAndroid Build Coastguard Worker  *     Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
499*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
500*de1e4e89SAndroid Build Coastguard Worker  *     @csum: csum to add
501*de1e4e89SAndroid Build Coastguard Worker  *     Return: csum on success or negative error
502*de1e4e89SAndroid Build Coastguard Worker  *
503*de1e4e89SAndroid Build Coastguard Worker  * void bpf_set_hash_invalid(skb)
504*de1e4e89SAndroid Build Coastguard Worker  *     Invalidate current skb->hash.
505*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
506*de1e4e89SAndroid Build Coastguard Worker  *
507*de1e4e89SAndroid Build Coastguard Worker  * int bpf_get_numa_node_id()
508*de1e4e89SAndroid Build Coastguard Worker  *     Return: Id of current NUMA node.
509*de1e4e89SAndroid Build Coastguard Worker  *
510*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_change_head()
511*de1e4e89SAndroid Build Coastguard Worker  *     Grows headroom of skb and adjusts MAC header offset accordingly.
512*de1e4e89SAndroid Build Coastguard Worker  *     Will extends/reallocae as required automatically.
513*de1e4e89SAndroid Build Coastguard Worker  *     May change skb data pointer and will thus invalidate any check
514*de1e4e89SAndroid Build Coastguard Worker  *     performed for direct packet access.
515*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
516*de1e4e89SAndroid Build Coastguard Worker  *     @len: length of header to be pushed in front
517*de1e4e89SAndroid Build Coastguard Worker  *     @flags: Flags (unused for now)
518*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error
519*de1e4e89SAndroid Build Coastguard Worker  *
520*de1e4e89SAndroid Build Coastguard Worker  * int bpf_xdp_adjust_head(xdp_md, delta)
521*de1e4e89SAndroid Build Coastguard Worker  *     Adjust the xdp_md.data by delta
522*de1e4e89SAndroid Build Coastguard Worker  *     @xdp_md: pointer to xdp_md
523*de1e4e89SAndroid Build Coastguard Worker  *     @delta: An positive/negative integer to be added to xdp_md.data
524*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative on error
525*de1e4e89SAndroid Build Coastguard Worker  *
526*de1e4e89SAndroid Build Coastguard Worker  * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
527*de1e4e89SAndroid Build Coastguard Worker  *     Copy a NUL terminated string from unsafe address. In case the string
528*de1e4e89SAndroid Build Coastguard Worker  *     length is smaller than size, the target is not padded with further NUL
529*de1e4e89SAndroid Build Coastguard Worker  *     bytes. In case the string length is larger than size, just count-1
530*de1e4e89SAndroid Build Coastguard Worker  *     bytes are copied and the last byte is set to NUL.
531*de1e4e89SAndroid Build Coastguard Worker  *     @dst: destination address
532*de1e4e89SAndroid Build Coastguard Worker  *     @size: maximum number of bytes to copy, including the trailing NUL
533*de1e4e89SAndroid Build Coastguard Worker  *     @unsafe_ptr: unsafe address
534*de1e4e89SAndroid Build Coastguard Worker  *     Return:
535*de1e4e89SAndroid Build Coastguard Worker  *       > 0 length of the string including the trailing NUL on success
536*de1e4e89SAndroid Build Coastguard Worker  *       < 0 error
537*de1e4e89SAndroid Build Coastguard Worker  *
538*de1e4e89SAndroid Build Coastguard Worker  * u64 bpf_get_socket_cookie(skb)
539*de1e4e89SAndroid Build Coastguard Worker  *     Get the cookie for the socket stored inside sk_buff.
540*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
541*de1e4e89SAndroid Build Coastguard Worker  *     Return: 8 Bytes non-decreasing number on success or 0 if the socket
542*de1e4e89SAndroid Build Coastguard Worker  *     field is missing inside sk_buff
543*de1e4e89SAndroid Build Coastguard Worker  *
544*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_get_socket_uid(skb)
545*de1e4e89SAndroid Build Coastguard Worker  *     Get the owner uid of the socket stored inside sk_buff.
546*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
547*de1e4e89SAndroid Build Coastguard Worker  *     Return: uid of the socket owner on success or overflowuid if failed.
548*de1e4e89SAndroid Build Coastguard Worker  *
549*de1e4e89SAndroid Build Coastguard Worker  * u32 bpf_set_hash(skb, hash)
550*de1e4e89SAndroid Build Coastguard Worker  *     Set full skb->hash.
551*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
552*de1e4e89SAndroid Build Coastguard Worker  *     @hash: hash to set
553*de1e4e89SAndroid Build Coastguard Worker  *
554*de1e4e89SAndroid Build Coastguard Worker  * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
555*de1e4e89SAndroid Build Coastguard Worker  *     Calls setsockopt. Not all opts are available, only those with
556*de1e4e89SAndroid Build Coastguard Worker  *     integer optvals plus TCP_CONGESTION.
557*de1e4e89SAndroid Build Coastguard Worker  *     Supported levels: SOL_SOCKET and IPROTO_TCP
558*de1e4e89SAndroid Build Coastguard Worker  *     @bpf_socket: pointer to bpf_socket
559*de1e4e89SAndroid Build Coastguard Worker  *     @level: SOL_SOCKET or IPROTO_TCP
560*de1e4e89SAndroid Build Coastguard Worker  *     @optname: option name
561*de1e4e89SAndroid Build Coastguard Worker  *     @optval: pointer to option value
562*de1e4e89SAndroid Build Coastguard Worker  *     @optlen: length of optval in byes
563*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 or negative error
564*de1e4e89SAndroid Build Coastguard Worker  *
565*de1e4e89SAndroid Build Coastguard Worker  * int bpf_skb_adjust_room(skb, len_diff, mode, flags)
566*de1e4e89SAndroid Build Coastguard Worker  *     Grow or shrink room in sk_buff.
567*de1e4e89SAndroid Build Coastguard Worker  *     @skb: pointer to skb
568*de1e4e89SAndroid Build Coastguard Worker  *     @len_diff: (signed) amount of room to grow/shrink
569*de1e4e89SAndroid Build Coastguard Worker  *     @mode: operation mode (enum bpf_adj_room_mode)
570*de1e4e89SAndroid Build Coastguard Worker  *     @flags: reserved for future use
571*de1e4e89SAndroid Build Coastguard Worker  *     Return: 0 on success or negative error code
572*de1e4e89SAndroid Build Coastguard Worker  *
573*de1e4e89SAndroid Build Coastguard Worker  * int bpf_sk_redirect_map(map, key, flags)
574*de1e4e89SAndroid Build Coastguard Worker  *     Redirect skb to a sock in map using key as a lookup key for the
575*de1e4e89SAndroid Build Coastguard Worker  *     sock in map.
576*de1e4e89SAndroid Build Coastguard Worker  *     @map: pointer to sockmap
577*de1e4e89SAndroid Build Coastguard Worker  *     @key: key to lookup sock in map
578*de1e4e89SAndroid Build Coastguard Worker  *     @flags: reserved for future use
579*de1e4e89SAndroid Build Coastguard Worker  *     Return: SK_PASS
580*de1e4e89SAndroid Build Coastguard Worker  *
581*de1e4e89SAndroid Build Coastguard Worker  * int bpf_sock_map_update(skops, map, key, flags)
582*de1e4e89SAndroid Build Coastguard Worker  *	@skops: pointer to bpf_sock_ops
583*de1e4e89SAndroid Build Coastguard Worker  *	@map: pointer to sockmap to update
584*de1e4e89SAndroid Build Coastguard Worker  *	@key: key to insert/update sock in map
585*de1e4e89SAndroid Build Coastguard Worker  *	@flags: same flags as map update elem
586*de1e4e89SAndroid Build Coastguard Worker  */
587*de1e4e89SAndroid Build Coastguard Worker #define __BPF_FUNC_MAPPER(FN)		\
588*de1e4e89SAndroid Build Coastguard Worker 	FN(unspec),			\
589*de1e4e89SAndroid Build Coastguard Worker 	FN(map_lookup_elem),		\
590*de1e4e89SAndroid Build Coastguard Worker 	FN(map_update_elem),		\
591*de1e4e89SAndroid Build Coastguard Worker 	FN(map_delete_elem),		\
592*de1e4e89SAndroid Build Coastguard Worker 	FN(probe_read),			\
593*de1e4e89SAndroid Build Coastguard Worker 	FN(ktime_get_ns),		\
594*de1e4e89SAndroid Build Coastguard Worker 	FN(trace_printk),		\
595*de1e4e89SAndroid Build Coastguard Worker 	FN(get_prandom_u32),		\
596*de1e4e89SAndroid Build Coastguard Worker 	FN(get_smp_processor_id),	\
597*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_store_bytes),		\
598*de1e4e89SAndroid Build Coastguard Worker 	FN(l3_csum_replace),		\
599*de1e4e89SAndroid Build Coastguard Worker 	FN(l4_csum_replace),		\
600*de1e4e89SAndroid Build Coastguard Worker 	FN(tail_call),			\
601*de1e4e89SAndroid Build Coastguard Worker 	FN(clone_redirect),		\
602*de1e4e89SAndroid Build Coastguard Worker 	FN(get_current_pid_tgid),	\
603*de1e4e89SAndroid Build Coastguard Worker 	FN(get_current_uid_gid),	\
604*de1e4e89SAndroid Build Coastguard Worker 	FN(get_current_comm),		\
605*de1e4e89SAndroid Build Coastguard Worker 	FN(get_cgroup_classid),		\
606*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_vlan_push),		\
607*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_vlan_pop),		\
608*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_get_tunnel_key),		\
609*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_set_tunnel_key),		\
610*de1e4e89SAndroid Build Coastguard Worker 	FN(perf_event_read),		\
611*de1e4e89SAndroid Build Coastguard Worker 	FN(redirect),			\
612*de1e4e89SAndroid Build Coastguard Worker 	FN(get_route_realm),		\
613*de1e4e89SAndroid Build Coastguard Worker 	FN(perf_event_output),		\
614*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_load_bytes),		\
615*de1e4e89SAndroid Build Coastguard Worker 	FN(get_stackid),		\
616*de1e4e89SAndroid Build Coastguard Worker 	FN(csum_diff),			\
617*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_get_tunnel_opt),		\
618*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_set_tunnel_opt),		\
619*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_change_proto),		\
620*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_change_type),		\
621*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_under_cgroup),		\
622*de1e4e89SAndroid Build Coastguard Worker 	FN(get_hash_recalc),		\
623*de1e4e89SAndroid Build Coastguard Worker 	FN(get_current_task),		\
624*de1e4e89SAndroid Build Coastguard Worker 	FN(probe_write_user),		\
625*de1e4e89SAndroid Build Coastguard Worker 	FN(current_task_under_cgroup),	\
626*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_change_tail),		\
627*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_pull_data),		\
628*de1e4e89SAndroid Build Coastguard Worker 	FN(csum_update),		\
629*de1e4e89SAndroid Build Coastguard Worker 	FN(set_hash_invalid),		\
630*de1e4e89SAndroid Build Coastguard Worker 	FN(get_numa_node_id),		\
631*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_change_head),		\
632*de1e4e89SAndroid Build Coastguard Worker 	FN(xdp_adjust_head),		\
633*de1e4e89SAndroid Build Coastguard Worker 	FN(probe_read_str),		\
634*de1e4e89SAndroid Build Coastguard Worker 	FN(get_socket_cookie),		\
635*de1e4e89SAndroid Build Coastguard Worker 	FN(get_socket_uid),		\
636*de1e4e89SAndroid Build Coastguard Worker 	FN(set_hash),			\
637*de1e4e89SAndroid Build Coastguard Worker 	FN(setsockopt),			\
638*de1e4e89SAndroid Build Coastguard Worker 	FN(skb_adjust_room),		\
639*de1e4e89SAndroid Build Coastguard Worker 	FN(redirect_map),		\
640*de1e4e89SAndroid Build Coastguard Worker 	FN(sk_redirect_map),		\
641*de1e4e89SAndroid Build Coastguard Worker 	FN(sock_map_update),		\
642*de1e4e89SAndroid Build Coastguard Worker 
643*de1e4e89SAndroid Build Coastguard Worker /* integer value in 'imm' field of BPF_CALL instruction selects which helper
644*de1e4e89SAndroid Build Coastguard Worker  * function eBPF program intends to call
645*de1e4e89SAndroid Build Coastguard Worker  */
646*de1e4e89SAndroid Build Coastguard Worker #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
647*de1e4e89SAndroid Build Coastguard Worker enum bpf_func_id {
648*de1e4e89SAndroid Build Coastguard Worker 	__BPF_FUNC_MAPPER(__BPF_ENUM_FN)
649*de1e4e89SAndroid Build Coastguard Worker 	__BPF_FUNC_MAX_ID,
650*de1e4e89SAndroid Build Coastguard Worker };
651*de1e4e89SAndroid Build Coastguard Worker #undef __BPF_ENUM_FN
652*de1e4e89SAndroid Build Coastguard Worker 
653*de1e4e89SAndroid Build Coastguard Worker /* All flags used by eBPF helper functions, placed here. */
654*de1e4e89SAndroid Build Coastguard Worker 
655*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_skb_store_bytes flags. */
656*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_RECOMPUTE_CSUM		(1ULL << 0)
657*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_INVALIDATE_HASH		(1ULL << 1)
658*de1e4e89SAndroid Build Coastguard Worker 
659*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
660*de1e4e89SAndroid Build Coastguard Worker  * First 4 bits are for passing the header field size.
661*de1e4e89SAndroid Build Coastguard Worker  */
662*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_HDR_FIELD_MASK		0xfULL
663*de1e4e89SAndroid Build Coastguard Worker 
664*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_l4_csum_replace flags. */
665*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_PSEUDO_HDR		(1ULL << 4)
666*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_MARK_MANGLED_0		(1ULL << 5)
667*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_MARK_ENFORCE		(1ULL << 6)
668*de1e4e89SAndroid Build Coastguard Worker 
669*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
670*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_INGRESS			(1ULL << 0)
671*de1e4e89SAndroid Build Coastguard Worker 
672*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
673*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_TUNINFO_IPV6		(1ULL << 0)
674*de1e4e89SAndroid Build Coastguard Worker 
675*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_get_stackid flags. */
676*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_SKIP_FIELD_MASK		0xffULL
677*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_USER_STACK		(1ULL << 8)
678*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_FAST_STACK_CMP		(1ULL << 9)
679*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_REUSE_STACKID		(1ULL << 10)
680*de1e4e89SAndroid Build Coastguard Worker 
681*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_skb_set_tunnel_key flags. */
682*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_ZERO_CSUM_TX		(1ULL << 1)
683*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_DONT_FRAGMENT		(1ULL << 2)
684*de1e4e89SAndroid Build Coastguard Worker 
685*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_perf_event_output and BPF_FUNC_perf_event_read flags. */
686*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_INDEX_MASK		0xffffffffULL
687*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_CURRENT_CPU		BPF_F_INDEX_MASK
688*de1e4e89SAndroid Build Coastguard Worker /* BPF_FUNC_perf_event_output for sk_buff input context. */
689*de1e4e89SAndroid Build Coastguard Worker #define BPF_F_CTXLEN_MASK		(0xfffffULL << 32)
690*de1e4e89SAndroid Build Coastguard Worker 
691*de1e4e89SAndroid Build Coastguard Worker /* Mode for BPF_FUNC_skb_adjust_room helper. */
692*de1e4e89SAndroid Build Coastguard Worker enum bpf_adj_room_mode {
693*de1e4e89SAndroid Build Coastguard Worker 	BPF_ADJ_ROOM_NET,
694*de1e4e89SAndroid Build Coastguard Worker };
695*de1e4e89SAndroid Build Coastguard Worker 
696*de1e4e89SAndroid Build Coastguard Worker /* user accessible mirror of in-kernel sk_buff.
697*de1e4e89SAndroid Build Coastguard Worker  * new fields can only be added to the end of this structure
698*de1e4e89SAndroid Build Coastguard Worker  */
699*de1e4e89SAndroid Build Coastguard Worker struct __sk_buff {
700*de1e4e89SAndroid Build Coastguard Worker 	__u32 len;
701*de1e4e89SAndroid Build Coastguard Worker 	__u32 pkt_type;
702*de1e4e89SAndroid Build Coastguard Worker 	__u32 mark;
703*de1e4e89SAndroid Build Coastguard Worker 	__u32 queue_mapping;
704*de1e4e89SAndroid Build Coastguard Worker 	__u32 protocol;
705*de1e4e89SAndroid Build Coastguard Worker 	__u32 vlan_present;
706*de1e4e89SAndroid Build Coastguard Worker 	__u32 vlan_tci;
707*de1e4e89SAndroid Build Coastguard Worker 	__u32 vlan_proto;
708*de1e4e89SAndroid Build Coastguard Worker 	__u32 priority;
709*de1e4e89SAndroid Build Coastguard Worker 	__u32 ingress_ifindex;
710*de1e4e89SAndroid Build Coastguard Worker 	__u32 ifindex;
711*de1e4e89SAndroid Build Coastguard Worker 	__u32 tc_index;
712*de1e4e89SAndroid Build Coastguard Worker 	__u32 cb[5];
713*de1e4e89SAndroid Build Coastguard Worker 	__u32 hash;
714*de1e4e89SAndroid Build Coastguard Worker 	__u32 tc_classid;
715*de1e4e89SAndroid Build Coastguard Worker 	__u32 data;
716*de1e4e89SAndroid Build Coastguard Worker 	__u32 data_end;
717*de1e4e89SAndroid Build Coastguard Worker 	__u32 napi_id;
718*de1e4e89SAndroid Build Coastguard Worker 
719*de1e4e89SAndroid Build Coastguard Worker 	/* accessed by BPF_PROG_TYPE_sk_skb types */
720*de1e4e89SAndroid Build Coastguard Worker 	__u32 family;
721*de1e4e89SAndroid Build Coastguard Worker 	__u32 remote_ip4;	/* Stored in network byte order */
722*de1e4e89SAndroid Build Coastguard Worker 	__u32 local_ip4;	/* Stored in network byte order */
723*de1e4e89SAndroid Build Coastguard Worker 	__u32 remote_ip6[4];	/* Stored in network byte order */
724*de1e4e89SAndroid Build Coastguard Worker 	__u32 local_ip6[4];	/* Stored in network byte order */
725*de1e4e89SAndroid Build Coastguard Worker 	__u32 remote_port;	/* Stored in network byte order */
726*de1e4e89SAndroid Build Coastguard Worker 	__u32 local_port;	/* stored in host byte order */
727*de1e4e89SAndroid Build Coastguard Worker };
728*de1e4e89SAndroid Build Coastguard Worker 
729*de1e4e89SAndroid Build Coastguard Worker struct bpf_tunnel_key {
730*de1e4e89SAndroid Build Coastguard Worker 	__u32 tunnel_id;
731*de1e4e89SAndroid Build Coastguard Worker 	union {
732*de1e4e89SAndroid Build Coastguard Worker 		__u32 remote_ipv4;
733*de1e4e89SAndroid Build Coastguard Worker 		__u32 remote_ipv6[4];
734*de1e4e89SAndroid Build Coastguard Worker 	};
735*de1e4e89SAndroid Build Coastguard Worker 	__u8 tunnel_tos;
736*de1e4e89SAndroid Build Coastguard Worker 	__u8 tunnel_ttl;
737*de1e4e89SAndroid Build Coastguard Worker 	__u16 tunnel_ext;
738*de1e4e89SAndroid Build Coastguard Worker 	__u32 tunnel_label;
739*de1e4e89SAndroid Build Coastguard Worker };
740*de1e4e89SAndroid Build Coastguard Worker 
741*de1e4e89SAndroid Build Coastguard Worker /* Generic BPF return codes which all BPF program types may support.
742*de1e4e89SAndroid Build Coastguard Worker  * The values are binary compatible with their TC_ACT_* counter-part to
743*de1e4e89SAndroid Build Coastguard Worker  * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
744*de1e4e89SAndroid Build Coastguard Worker  * programs.
745*de1e4e89SAndroid Build Coastguard Worker  *
746*de1e4e89SAndroid Build Coastguard Worker  * XDP is handled seprately, see XDP_*.
747*de1e4e89SAndroid Build Coastguard Worker  */
748*de1e4e89SAndroid Build Coastguard Worker enum bpf_ret_code {
749*de1e4e89SAndroid Build Coastguard Worker 	BPF_OK = 0,
750*de1e4e89SAndroid Build Coastguard Worker 	/* 1 reserved */
751*de1e4e89SAndroid Build Coastguard Worker 	BPF_DROP = 2,
752*de1e4e89SAndroid Build Coastguard Worker 	/* 3-6 reserved */
753*de1e4e89SAndroid Build Coastguard Worker 	BPF_REDIRECT = 7,
754*de1e4e89SAndroid Build Coastguard Worker 	/* >127 are reserved for prog type specific return codes */
755*de1e4e89SAndroid Build Coastguard Worker };
756*de1e4e89SAndroid Build Coastguard Worker 
757*de1e4e89SAndroid Build Coastguard Worker struct bpf_sock {
758*de1e4e89SAndroid Build Coastguard Worker 	__u32 bound_dev_if;
759*de1e4e89SAndroid Build Coastguard Worker 	__u32 family;
760*de1e4e89SAndroid Build Coastguard Worker 	__u32 type;
761*de1e4e89SAndroid Build Coastguard Worker 	__u32 protocol;
762*de1e4e89SAndroid Build Coastguard Worker 	__u32 mark;
763*de1e4e89SAndroid Build Coastguard Worker 	__u32 priority;
764*de1e4e89SAndroid Build Coastguard Worker };
765*de1e4e89SAndroid Build Coastguard Worker 
766*de1e4e89SAndroid Build Coastguard Worker #define XDP_PACKET_HEADROOM 256
767*de1e4e89SAndroid Build Coastguard Worker 
768*de1e4e89SAndroid Build Coastguard Worker /* User return codes for XDP prog type.
769*de1e4e89SAndroid Build Coastguard Worker  * A valid XDP program must return one of these defined values. All other
770*de1e4e89SAndroid Build Coastguard Worker  * return codes are reserved for future use. Unknown return codes will
771*de1e4e89SAndroid Build Coastguard Worker  * result in packet drops and a warning via bpf_warn_invalid_xdp_action().
772*de1e4e89SAndroid Build Coastguard Worker  */
773*de1e4e89SAndroid Build Coastguard Worker enum xdp_action {
774*de1e4e89SAndroid Build Coastguard Worker 	XDP_ABORTED = 0,
775*de1e4e89SAndroid Build Coastguard Worker 	XDP_DROP,
776*de1e4e89SAndroid Build Coastguard Worker 	XDP_PASS,
777*de1e4e89SAndroid Build Coastguard Worker 	XDP_TX,
778*de1e4e89SAndroid Build Coastguard Worker 	XDP_REDIRECT,
779*de1e4e89SAndroid Build Coastguard Worker };
780*de1e4e89SAndroid Build Coastguard Worker 
781*de1e4e89SAndroid Build Coastguard Worker /* user accessible metadata for XDP packet hook
782*de1e4e89SAndroid Build Coastguard Worker  * new fields must be added to the end of this structure
783*de1e4e89SAndroid Build Coastguard Worker  */
784*de1e4e89SAndroid Build Coastguard Worker struct xdp_md {
785*de1e4e89SAndroid Build Coastguard Worker 	__u32 data;
786*de1e4e89SAndroid Build Coastguard Worker 	__u32 data_end;
787*de1e4e89SAndroid Build Coastguard Worker };
788*de1e4e89SAndroid Build Coastguard Worker 
789*de1e4e89SAndroid Build Coastguard Worker enum sk_action {
790*de1e4e89SAndroid Build Coastguard Worker 	SK_DROP = 0,
791*de1e4e89SAndroid Build Coastguard Worker 	SK_PASS,
792*de1e4e89SAndroid Build Coastguard Worker };
793*de1e4e89SAndroid Build Coastguard Worker 
794*de1e4e89SAndroid Build Coastguard Worker #define BPF_TAG_SIZE	8
795*de1e4e89SAndroid Build Coastguard Worker 
796*de1e4e89SAndroid Build Coastguard Worker struct bpf_prog_info {
797*de1e4e89SAndroid Build Coastguard Worker 	__u32 type;
798*de1e4e89SAndroid Build Coastguard Worker 	__u32 id;
799*de1e4e89SAndroid Build Coastguard Worker 	__u8  tag[BPF_TAG_SIZE];
800*de1e4e89SAndroid Build Coastguard Worker 	__u32 jited_prog_len;
801*de1e4e89SAndroid Build Coastguard Worker 	__u32 xlated_prog_len;
802*de1e4e89SAndroid Build Coastguard Worker 	__aligned_u64 jited_prog_insns;
803*de1e4e89SAndroid Build Coastguard Worker 	__aligned_u64 xlated_prog_insns;
804*de1e4e89SAndroid Build Coastguard Worker } __attribute__((aligned(8)));
805*de1e4e89SAndroid Build Coastguard Worker 
806*de1e4e89SAndroid Build Coastguard Worker struct bpf_map_info {
807*de1e4e89SAndroid Build Coastguard Worker 	__u32 type;
808*de1e4e89SAndroid Build Coastguard Worker 	__u32 id;
809*de1e4e89SAndroid Build Coastguard Worker 	__u32 key_size;
810*de1e4e89SAndroid Build Coastguard Worker 	__u32 value_size;
811*de1e4e89SAndroid Build Coastguard Worker 	__u32 max_entries;
812*de1e4e89SAndroid Build Coastguard Worker 	__u32 map_flags;
813*de1e4e89SAndroid Build Coastguard Worker } __attribute__((aligned(8)));
814*de1e4e89SAndroid Build Coastguard Worker 
815*de1e4e89SAndroid Build Coastguard Worker /* User bpf_sock_ops struct to access socket values and specify request ops
816*de1e4e89SAndroid Build Coastguard Worker  * and their replies.
817*de1e4e89SAndroid Build Coastguard Worker  * Some of this fields are in network (bigendian) byte order and may need
818*de1e4e89SAndroid Build Coastguard Worker  * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
819*de1e4e89SAndroid Build Coastguard Worker  * New fields can only be added at the end of this structure
820*de1e4e89SAndroid Build Coastguard Worker  */
821*de1e4e89SAndroid Build Coastguard Worker struct bpf_sock_ops {
822*de1e4e89SAndroid Build Coastguard Worker 	__u32 op;
823*de1e4e89SAndroid Build Coastguard Worker 	union {
824*de1e4e89SAndroid Build Coastguard Worker 		__u32 reply;
825*de1e4e89SAndroid Build Coastguard Worker 		__u32 replylong[4];
826*de1e4e89SAndroid Build Coastguard Worker 	};
827*de1e4e89SAndroid Build Coastguard Worker 	__u32 family;
828*de1e4e89SAndroid Build Coastguard Worker 	__u32 remote_ip4;	/* Stored in network byte order */
829*de1e4e89SAndroid Build Coastguard Worker 	__u32 local_ip4;	/* Stored in network byte order */
830*de1e4e89SAndroid Build Coastguard Worker 	__u32 remote_ip6[4];	/* Stored in network byte order */
831*de1e4e89SAndroid Build Coastguard Worker 	__u32 local_ip6[4];	/* Stored in network byte order */
832*de1e4e89SAndroid Build Coastguard Worker 	__u32 remote_port;	/* Stored in network byte order */
833*de1e4e89SAndroid Build Coastguard Worker 	__u32 local_port;	/* stored in host byte order */
834*de1e4e89SAndroid Build Coastguard Worker };
835*de1e4e89SAndroid Build Coastguard Worker 
836*de1e4e89SAndroid Build Coastguard Worker /* List of known BPF sock_ops operators.
837*de1e4e89SAndroid Build Coastguard Worker  * New entries can only be added at the end
838*de1e4e89SAndroid Build Coastguard Worker  */
839*de1e4e89SAndroid Build Coastguard Worker enum {
840*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_VOID,
841*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_TIMEOUT_INIT,	/* Should return SYN-RTO value to use or
842*de1e4e89SAndroid Build Coastguard Worker 					 * -1 if default value should be used
843*de1e4e89SAndroid Build Coastguard Worker 					 */
844*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_RWND_INIT,		/* Should return initial advertized
845*de1e4e89SAndroid Build Coastguard Worker 					 * window (in packets) or -1 if default
846*de1e4e89SAndroid Build Coastguard Worker 					 * value should be used
847*de1e4e89SAndroid Build Coastguard Worker 					 */
848*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_TCP_CONNECT_CB,	/* Calls BPF program right before an
849*de1e4e89SAndroid Build Coastguard Worker 					 * active connection is initialized
850*de1e4e89SAndroid Build Coastguard Worker 					 */
851*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB,	/* Calls BPF program when an
852*de1e4e89SAndroid Build Coastguard Worker 						 * active connection is
853*de1e4e89SAndroid Build Coastguard Worker 						 * established
854*de1e4e89SAndroid Build Coastguard Worker 						 */
855*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB,	/* Calls BPF program when a
856*de1e4e89SAndroid Build Coastguard Worker 						 * passive connection is
857*de1e4e89SAndroid Build Coastguard Worker 						 * established
858*de1e4e89SAndroid Build Coastguard Worker 						 */
859*de1e4e89SAndroid Build Coastguard Worker 	BPF_SOCK_OPS_NEEDS_ECN,		/* If connection's congestion control
860*de1e4e89SAndroid Build Coastguard Worker 					 * needs ECN
861*de1e4e89SAndroid Build Coastguard Worker 					 */
862*de1e4e89SAndroid Build Coastguard Worker };
863*de1e4e89SAndroid Build Coastguard Worker 
864*de1e4e89SAndroid Build Coastguard Worker #define TCP_BPF_IW		1001	/* Set TCP initial congestion window */
865*de1e4e89SAndroid Build Coastguard Worker #define TCP_BPF_SNDCWND_CLAMP	1002	/* Set sndcwnd_clamp */
866*de1e4e89SAndroid Build Coastguard Worker 
867*de1e4e89SAndroid Build Coastguard Worker #endif /* __LINUX_BPF_H__ */
868