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